/* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #include "config.h" #include #include #include "gtklabel.h" #include "gtkaccellabel.h" #include "gtkdnd.h" #include "gtkmainprivate.h" #include "gtkmarshalers.h" #include "gtkpango.h" #include "gtkwindow.h" #include "gtkclipboard.h" #include "gtkimagemenuitem.h" #include "gtkintl.h" #include "gtkseparatormenuitem.h" #include "gtktextutil.h" #include "gtkmenuitem.h" #include "gtkmenushellprivate.h" #include "gtknotebook.h" #include "gtkstock.h" #include "gtkbindings.h" #include "gtkbuildable.h" #include "gtkimage.h" #include "gtkshow.h" #include "gtktooltip.h" #include "gtkprivate.h" #include "gtktypebuiltins.h" /*rint() is only available in GCC and/or C99*/ #if (__STDC_VERSION__ < 199901L && !defined __GNUC__) double rint(double x) { if (ceil(x+0.5) == floor(x+0.5)) { int a = (int)ceil(x); if (a%2 == 0) return ceil(x); else return floor(x); } else return floor(x+0.5); } #endif struct _GtkLabelPrivate { GtkLabelSelectionInfo *select_info; GtkWidget *mnemonic_widget; GtkWindow *mnemonic_window; PangoAttrList *attrs; PangoAttrList *effective_attrs; PangoLayout *layout; gboolean mnemonics_visible; gchar *label; gchar *text; guint jtype : 2; guint wrap : 1; guint use_underline : 1; guint use_markup : 1; guint ellipsize : 3; guint single_line_mode : 1; guint have_transform : 1; guint in_click : 1; guint wrap_mode : 3; guint pattern_set : 1; guint track_links : 1; guint mnemonic_keyval; gint wrap_width; gint width_chars; gint max_width_chars; gdouble angle; }; /* Notes about the handling of links: * * Links share the GtkLabelSelectionInfo struct with selectable labels. * There are some new fields for links. The links field contains the list * of GtkLabelLink structs that describe the links which are embedded in * the label. The active_link field points to the link under the mouse * pointer. For keyboard navigation, the 'focus' link is determined by * finding the link which contains the selection_anchor position. * The link_clicked field is used with button press and release events * to ensure that pressing inside a link and releasing outside of it * does not activate the link. * * Links are rendered with the link-color/visited-link-color colors * that are determined by the style and with an underline. When the mouse * pointer is over a link, the pointer is changed to indicate the link, * and the background behind the link is rendered with the base[PRELIGHT] * color. While a button is pressed over a link, the background is rendered * with the base[ACTIVE] color. * * Labels with links accept keyboard focus, and it is possible to move * the focus between the embedded links using Tab/Shift-Tab. The focus * is indicated by a focus rectangle that is drawn around the link text. * Pressing Enter activates the focussed link, and there is a suitable * context menu for links that can be opened with the Menu key. Pressing * Control-C copies the link URI to the clipboard. * * In selectable labels with links, link functionality is only available * when the selection is empty. */ typedef struct { gchar *uri; gchar *title; /* the title attribute, used as tooltip */ gboolean visited; /* get set when the link is activated; this flag * gets preserved over later set_markup() calls */ gint start; /* position of the link in the PangoLayout */ gint end; } GtkLabelLink; struct _GtkLabelSelectionInfo { GdkWindow *window; gint selection_anchor; gint selection_end; GtkWidget *popup_menu; GList *links; GtkLabelLink *active_link; gint drag_start_x; gint drag_start_y; guint in_drag : 1; guint select_words : 1; guint selectable : 1; guint link_clicked : 1; }; enum { MOVE_CURSOR, COPY_CLIPBOARD, POPULATE_POPUP, ACTIVATE_LINK, ACTIVATE_CURRENT_LINK, LAST_SIGNAL }; enum { PROP_0, PROP_LABEL, PROP_ATTRIBUTES, PROP_USE_MARKUP, PROP_USE_UNDERLINE, PROP_JUSTIFY, PROP_PATTERN, PROP_WRAP, PROP_WRAP_MODE, PROP_SELECTABLE, PROP_MNEMONIC_KEYVAL, PROP_MNEMONIC_WIDGET, PROP_CURSOR_POSITION, PROP_SELECTION_BOUND, PROP_ELLIPSIZE, PROP_WIDTH_CHARS, PROP_SINGLE_LINE_MODE, PROP_ANGLE, PROP_MAX_WIDTH_CHARS, PROP_TRACK_VISITED_LINKS }; /* When rotating ellipsizable text we want the natural size to request * more to ensure the label wont ever ellipsize in an allocation of full natural size. * */ #define ROTATION_ELLIPSIZE_PADDING 2 static guint signals[LAST_SIGNAL] = { 0 }; static const GdkColor default_link_color = { 0, 0, 0, 0xeeee }; static const GdkColor default_visited_link_color = { 0, 0x5555, 0x1a1a, 0x8b8b }; static void gtk_label_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_label_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_label_finalize (GObject *object); static void gtk_label_destroy (GtkWidget *widget); static void gtk_label_size_allocate (GtkWidget *widget, GtkAllocation *allocation); static void gtk_label_state_changed (GtkWidget *widget, GtkStateType state); static void gtk_label_style_updated (GtkWidget *widget); static void gtk_label_direction_changed (GtkWidget *widget, GtkTextDirection previous_dir); static gint gtk_label_draw (GtkWidget *widget, cairo_t *cr); static gboolean gtk_label_focus (GtkWidget *widget, GtkDirectionType direction); static void gtk_label_realize (GtkWidget *widget); static void gtk_label_unrealize (GtkWidget *widget); static void gtk_label_map (GtkWidget *widget); static void gtk_label_unmap (GtkWidget *widget); static gboolean gtk_label_button_press (GtkWidget *widget, GdkEventButton *event); static gboolean gtk_label_button_release (GtkWidget *widget, GdkEventButton *event); static gboolean gtk_label_motion (GtkWidget *widget, GdkEventMotion *event); static gboolean gtk_label_leave_notify (GtkWidget *widget, GdkEventCrossing *event); static void gtk_label_grab_focus (GtkWidget *widget); static gboolean gtk_label_query_tooltip (GtkWidget *widget, gint x, gint y, gboolean keyboard_tip, GtkTooltip *tooltip); static void gtk_label_set_text_internal (GtkLabel *label, gchar *str); static void gtk_label_set_label_internal (GtkLabel *label, gchar *str); static void gtk_label_set_use_markup_internal (GtkLabel *label, gboolean val); static void gtk_label_set_use_underline_internal (GtkLabel *label, gboolean val); static void gtk_label_set_attributes_internal (GtkLabel *label, PangoAttrList *attrs); static void gtk_label_set_uline_text_internal (GtkLabel *label, const gchar *str); static void gtk_label_set_pattern_internal (GtkLabel *label, const gchar *pattern, gboolean is_mnemonic); static void gtk_label_set_markup_internal (GtkLabel *label, const gchar *str, gboolean with_uline); static void gtk_label_recalculate (GtkLabel *label); static void gtk_label_hierarchy_changed (GtkWidget *widget, GtkWidget *old_toplevel); static void gtk_label_screen_changed (GtkWidget *widget, GdkScreen *old_screen); static gboolean gtk_label_popup_menu (GtkWidget *widget); static void gtk_label_create_window (GtkLabel *label); static void gtk_label_destroy_window (GtkLabel *label); static void gtk_label_ensure_select_info (GtkLabel *label); static void gtk_label_clear_select_info (GtkLabel *label); static void gtk_label_update_cursor (GtkLabel *label); static void gtk_label_clear_layout (GtkLabel *label); static void gtk_label_ensure_layout (GtkLabel *label); static void gtk_label_invalidate_wrap_width (GtkLabel *label); static void gtk_label_select_region_index (GtkLabel *label, gint anchor_index, gint end_index); static gboolean gtk_label_mnemonic_activate (GtkWidget *widget, gboolean group_cycling); static void gtk_label_setup_mnemonic (GtkLabel *label, guint last_key); static void gtk_label_drag_data_get (GtkWidget *widget, GdkDragContext *context, GtkSelectionData *selection_data, guint info, guint time); static void gtk_label_buildable_interface_init (GtkBuildableIface *iface); static gboolean gtk_label_buildable_custom_tag_start (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const gchar *tagname, GMarkupParser *parser, gpointer *data); static void gtk_label_buildable_custom_finished (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const gchar *tagname, gpointer user_data); static void connect_mnemonics_visible_notify (GtkLabel *label); static gboolean separate_uline_pattern (const gchar *str, guint *accel_key, gchar **new_str, gchar **pattern); /* For selectable labels: */ static void gtk_label_move_cursor (GtkLabel *label, GtkMovementStep step, gint count, gboolean extend_selection); static void gtk_label_copy_clipboard (GtkLabel *label); static void gtk_label_select_all (GtkLabel *label); static void gtk_label_do_popup (GtkLabel *label, GdkEventButton *event); static gint gtk_label_move_forward_word (GtkLabel *label, gint start); static gint gtk_label_move_backward_word (GtkLabel *label, gint start); /* For links: */ static void gtk_label_rescan_links (GtkLabel *label); static void gtk_label_clear_links (GtkLabel *label); static gboolean gtk_label_activate_link (GtkLabel *label, const gchar *uri); static void gtk_label_activate_current_link (GtkLabel *label); static GtkLabelLink *gtk_label_get_current_link (GtkLabel *label); static void gtk_label_get_link_colors (GtkWidget *widget, GdkColor **link_color, GdkColor **visited_link_color); static void emit_activate_link (GtkLabel *label, GtkLabelLink *link); static GtkSizeRequestMode gtk_label_get_request_mode (GtkWidget *widget); static void gtk_label_get_preferred_width (GtkWidget *widget, gint *minimum_size, gint *natural_size); static void gtk_label_get_preferred_height (GtkWidget *widget, gint *minimum_size, gint *natural_size); static void gtk_label_get_preferred_width_for_height (GtkWidget *widget, gint height, gint *minimum_width, gint *natural_width); static void gtk_label_get_preferred_height_for_width (GtkWidget *widget, gint width, gint *minimum_height, gint *natural_height); static GtkBuildableIface *buildable_parent_iface = NULL; G_DEFINE_TYPE_WITH_CODE (GtkLabel, gtk_label, GTK_TYPE_MISC, G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE, gtk_label_buildable_interface_init)) static void add_move_binding (GtkBindingSet *binding_set, guint keyval, guint modmask, GtkMovementStep step, gint count) { g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0); gtk_binding_entry_add_signal (binding_set, keyval, modmask, "move-cursor", 3, G_TYPE_ENUM, step, G_TYPE_INT, count, G_TYPE_BOOLEAN, FALSE); /* Selection-extending version */ gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK, "move-cursor", 3, G_TYPE_ENUM, step, G_TYPE_INT, count, G_TYPE_BOOLEAN, TRUE); } static void gtk_label_class_init (GtkLabelClass *class) { GObjectClass *gobject_class = G_OBJECT_CLASS (class); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class); GtkBindingSet *binding_set; gobject_class->set_property = gtk_label_set_property; gobject_class->get_property = gtk_label_get_property; gobject_class->finalize = gtk_label_finalize; widget_class->destroy = gtk_label_destroy; widget_class->size_allocate = gtk_label_size_allocate; widget_class->state_changed = gtk_label_state_changed; widget_class->style_updated = gtk_label_style_updated; widget_class->query_tooltip = gtk_label_query_tooltip; widget_class->direction_changed = gtk_label_direction_changed; widget_class->draw = gtk_label_draw; widget_class->realize = gtk_label_realize; widget_class->unrealize = gtk_label_unrealize; widget_class->map = gtk_label_map; widget_class->unmap = gtk_label_unmap; widget_class->button_press_event = gtk_label_button_press; widget_class->button_release_event = gtk_label_button_release; widget_class->motion_notify_event = gtk_label_motion; widget_class->leave_notify_event = gtk_label_leave_notify; widget_class->hierarchy_changed = gtk_label_hierarchy_changed; widget_class->screen_changed = gtk_label_screen_changed; widget_class->mnemonic_activate = gtk_label_mnemonic_activate; widget_class->drag_data_get = gtk_label_drag_data_get; widget_class->grab_focus = gtk_label_grab_focus; widget_class->popup_menu = gtk_label_popup_menu; widget_class->focus = gtk_label_focus; widget_class->get_request_mode = gtk_label_get_request_mode; widget_class->get_preferred_width = gtk_label_get_preferred_width; widget_class->get_preferred_height = gtk_label_get_preferred_height; widget_class->get_preferred_width_for_height = gtk_label_get_preferred_width_for_height; widget_class->get_preferred_height_for_width = gtk_label_get_preferred_height_for_width; class->move_cursor = gtk_label_move_cursor; class->copy_clipboard = gtk_label_copy_clipboard; class->activate_link = gtk_label_activate_link; /** * GtkLabel::move-cursor: * @entry: the object which received the signal * @step: the granularity of the move, as a #GtkMovementStep * @count: the number of @step units to move * @extend_selection: %TRUE if the move should extend the selection * * The ::move-cursor signal is a * keybinding signal * which gets emitted when the user initiates a cursor movement. * If the cursor is not visible in @entry, this signal causes * the viewport to be moved instead. * * Applications should not connect to it, but may emit it with * g_signal_emit_by_name() if they need to control the cursor * programmatically. * * The default bindings for this signal come in two variants, * the variant with the Shift modifier extends the selection, * the variant without the Shift modifer does not. * There are too many key combinations to list them all here. * * Arrow keys move by individual characters/lines * Ctrl-arrow key combinations move by words/paragraphs * Home/End keys move to the ends of the buffer * */ signals[MOVE_CURSOR] = g_signal_new (I_("move-cursor"), G_OBJECT_CLASS_TYPE (gobject_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkLabelClass, move_cursor), NULL, NULL, _gtk_marshal_VOID__ENUM_INT_BOOLEAN, G_TYPE_NONE, 3, GTK_TYPE_MOVEMENT_STEP, G_TYPE_INT, G_TYPE_BOOLEAN); /** * GtkLabel::copy-clipboard: * @label: the object which received the signal * * The ::copy-clipboard signal is a * keybinding signal * which gets emitted to copy the selection to the clipboard. * * The default binding for this signal is Ctrl-c. */ signals[COPY_CLIPBOARD] = g_signal_new (I_("copy-clipboard"), G_OBJECT_CLASS_TYPE (gobject_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkLabelClass, copy_clipboard), NULL, NULL, _gtk_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * GtkLabel::populate-popup: * @label: The label on which the signal is emitted * @menu: the menu that is being populated * * The ::populate-popup signal gets emitted before showing the * context menu of the label. Note that only selectable labels * have context menus. * * If you need to add items to the context menu, connect * to this signal and append your menuitems to the @menu. */ signals[POPULATE_POPUP] = g_signal_new (I_("populate-popup"), G_OBJECT_CLASS_TYPE (gobject_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkLabelClass, populate_popup), NULL, NULL, _gtk_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GTK_TYPE_MENU); /** * GtkLabel::activate-current-link: * @label: The label on which the signal was emitted * * A keybinding signal * which gets emitted when the user activates a link in the label. * * Applications may also emit the signal with g_signal_emit_by_name() * if they need to control activation of URIs programmatically. * * The default bindings for this signal are all forms of the Enter key. * * Since: 2.18 */ signals[ACTIVATE_CURRENT_LINK] = g_signal_new_class_handler ("activate-current-link", G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_CALLBACK (gtk_label_activate_current_link), NULL, NULL, _gtk_marshal_VOID__VOID, G_TYPE_NONE, 0); /** * GtkLabel::activate-link: * @label: The label on which the signal was emitted * @uri: the URI that is activated * * The signal which gets emitted to activate a URI. * Applications may connect to it to override the default behaviour, * which is to call gtk_show_uri(). * * Returns: %TRUE if the link has been activated * * Since: 2.18 */ signals[ACTIVATE_LINK] = g_signal_new ("activate-link", G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkLabelClass, activate_link), _gtk_boolean_handled_accumulator, NULL, _gtk_marshal_BOOLEAN__STRING, G_TYPE_BOOLEAN, 1, G_TYPE_STRING); g_object_class_install_property (gobject_class, PROP_LABEL, g_param_spec_string ("label", P_("Label"), P_("The text of the label"), "", GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_ATTRIBUTES, g_param_spec_boxed ("attributes", P_("Attributes"), P_("A list of style attributes to apply to the text of the label"), PANGO_TYPE_ATTR_LIST, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_USE_MARKUP, g_param_spec_boolean ("use-markup", P_("Use markup"), P_("The text of the label includes XML markup. See pango_parse_markup()"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_USE_UNDERLINE, g_param_spec_boolean ("use-underline", P_("Use underline"), P_("If set, an underline in the text indicates the next character should be used for the mnemonic accelerator key"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_JUSTIFY, g_param_spec_enum ("justify", P_("Justification"), P_("The alignment of the lines in the text of the label relative to each other. This does NOT affect the alignment of the label within its allocation. See GtkMisc::xalign for that"), GTK_TYPE_JUSTIFICATION, GTK_JUSTIFY_LEFT, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_PATTERN, g_param_spec_string ("pattern", P_("Pattern"), P_("A string with _ characters in positions correspond to characters in the text to underline"), NULL, GTK_PARAM_WRITABLE)); g_object_class_install_property (gobject_class, PROP_WRAP, g_param_spec_boolean ("wrap", P_("Line wrap"), P_("If set, wrap lines if the text becomes too wide"), FALSE, GTK_PARAM_READWRITE)); /** * GtkLabel:wrap-mode: * * If line wrapping is on (see the #GtkLabel:wrap property) this controls * how the line wrapping is done. The default is %PANGO_WRAP_WORD, which * means wrap on word boundaries. * * Since: 2.10 */ g_object_class_install_property (gobject_class, PROP_WRAP_MODE, g_param_spec_enum ("wrap-mode", P_("Line wrap mode"), P_("If wrap is set, controls how linewrapping is done"), PANGO_TYPE_WRAP_MODE, PANGO_WRAP_WORD, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_SELECTABLE, g_param_spec_boolean ("selectable", P_("Selectable"), P_("Whether the label text can be selected with the mouse"), FALSE, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_MNEMONIC_KEYVAL, g_param_spec_uint ("mnemonic-keyval", P_("Mnemonic key"), P_("The mnemonic accelerator key for this label"), 0, G_MAXUINT, GDK_KEY_VoidSymbol, GTK_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_MNEMONIC_WIDGET, g_param_spec_object ("mnemonic-widget", P_("Mnemonic widget"), P_("The widget to be activated when the label's mnemonic " "key is pressed"), GTK_TYPE_WIDGET, GTK_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_CURSOR_POSITION, g_param_spec_int ("cursor-position", P_("Cursor Position"), P_("The current position of the insertion cursor in chars"), 0, G_MAXINT, 0, GTK_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_SELECTION_BOUND, g_param_spec_int ("selection-bound", P_("Selection Bound"), P_("The position of the opposite end of the selection from the cursor in chars"), 0, G_MAXINT, 0, GTK_PARAM_READABLE)); /** * GtkLabel:ellipsize: * * The preferred place to ellipsize the string, if the label does * not have enough room to display the entire string, specified as a * #PangoEllisizeMode. * * Note that setting this property to a value other than * %PANGO_ELLIPSIZE_NONE has the side-effect that the label requests * only enough space to display the ellipsis "...". In particular, this * means that ellipsizing labels do not work well in notebook tabs, unless * the tab's #GtkNotebook:tab-expand property is set to %TRUE. Other ways * to set a label's width are gtk_widget_set_size_request() and * gtk_label_set_width_chars(). * * Since: 2.6 */ g_object_class_install_property (gobject_class, PROP_ELLIPSIZE, g_param_spec_enum ("ellipsize", P_("Ellipsize"), P_("The preferred place to ellipsize the string, if the label does not have enough room to display the entire string"), PANGO_TYPE_ELLIPSIZE_MODE, PANGO_ELLIPSIZE_NONE, GTK_PARAM_READWRITE)); /** * GtkLabel:width-chars: * * The desired width of the label, in characters. If this property is set to * -1, the width will be calculated automatically. * * See the section on text layout * for details of how #GtkLabel:width-chars and #GtkLabel:max-width-chars * determine the width of ellipsized and wrapped labels. * * Since: 2.6 **/ g_object_class_install_property (gobject_class, PROP_WIDTH_CHARS, g_param_spec_int ("width-chars", P_("Width In Characters"), P_("The desired width of the label, in characters"), -1, G_MAXINT, -1, GTK_PARAM_READWRITE)); /** * GtkLabel:single-line-mode: * * Whether the label is in single line mode. In single line mode, * the height of the label does not depend on the actual text, it * is always set to ascent + descent of the font. This can be an * advantage in situations where resizing the label because of text * changes would be distracting, e.g. in a statusbar. * * Since: 2.6 **/ g_object_class_install_property (gobject_class, PROP_SINGLE_LINE_MODE, g_param_spec_boolean ("single-line-mode", P_("Single Line Mode"), P_("Whether the label is in single line mode"), FALSE, GTK_PARAM_READWRITE)); /** * GtkLabel:angle: * * The angle that the baseline of the label makes with the horizontal, * in degrees, measured counterclockwise. An angle of 90 reads from * from bottom to top, an angle of 270, from top to bottom. Ignored * if the label is selectable, wrapped, or ellipsized. * * Since: 2.6 **/ g_object_class_install_property (gobject_class, PROP_ANGLE, g_param_spec_double ("angle", P_("Angle"), P_("Angle at which the label is rotated"), 0.0, 360.0, 0.0, GTK_PARAM_READWRITE)); /** * GtkLabel:max-width-chars: * * The desired maximum width of the label, in characters. If this property * is set to -1, the width will be calculated automatically. * * See the section on text layout * for details of how #GtkLabel:width-chars and #GtkLabel:max-width-chars * determine the width of ellipsized and wrapped labels. * * Since: 2.6 **/ g_object_class_install_property (gobject_class, PROP_MAX_WIDTH_CHARS, g_param_spec_int ("max-width-chars", P_("Maximum Width In Characters"), P_("The desired maximum width of the label, in characters"), -1, G_MAXINT, -1, GTK_PARAM_READWRITE)); /** * GtkLabel:track-visited-links: * * Set this property to %TRUE to make the label track which links * have been clicked. It will then apply the ::visited-link-color * color, instead of ::link-color. * * Since: 2.18 */ g_object_class_install_property (gobject_class, PROP_TRACK_VISITED_LINKS, g_param_spec_boolean ("track-visited-links", P_("Track visited links"), P_("Whether visited links should be tracked"), TRUE, GTK_PARAM_READWRITE)); /* * Key bindings */ binding_set = gtk_binding_set_by_class (class); /* Moving the insertion point */ add_move_binding (binding_set, GDK_KEY_Right, 0, GTK_MOVEMENT_VISUAL_POSITIONS, 1); add_move_binding (binding_set, GDK_KEY_Left, 0, GTK_MOVEMENT_VISUAL_POSITIONS, -1); add_move_binding (binding_set, GDK_KEY_KP_Right, 0, GTK_MOVEMENT_VISUAL_POSITIONS, 1); add_move_binding (binding_set, GDK_KEY_KP_Left, 0, GTK_MOVEMENT_VISUAL_POSITIONS, -1); add_move_binding (binding_set, GDK_KEY_f, GDK_CONTROL_MASK, GTK_MOVEMENT_LOGICAL_POSITIONS, 1); add_move_binding (binding_set, GDK_KEY_b, GDK_CONTROL_MASK, GTK_MOVEMENT_LOGICAL_POSITIONS, -1); add_move_binding (binding_set, GDK_KEY_Right, GDK_CONTROL_MASK, GTK_MOVEMENT_WORDS, 1); add_move_binding (binding_set, GDK_KEY_Left, GDK_CONTROL_MASK, GTK_MOVEMENT_WORDS, -1); add_move_binding (binding_set, GDK_KEY_KP_Right, GDK_CONTROL_MASK, GTK_MOVEMENT_WORDS, 1); add_move_binding (binding_set, GDK_KEY_KP_Left, GDK_CONTROL_MASK, GTK_MOVEMENT_WORDS, -1); /* select all */ gtk_binding_entry_add_signal (binding_set, GDK_KEY_a, GDK_CONTROL_MASK, "move-cursor", 3, G_TYPE_ENUM, GTK_MOVEMENT_PARAGRAPH_ENDS, G_TYPE_INT, -1, G_TYPE_BOOLEAN, FALSE); gtk_binding_entry_add_signal (binding_set, GDK_KEY_a, GDK_CONTROL_MASK, "move-cursor", 3, G_TYPE_ENUM, GTK_MOVEMENT_PARAGRAPH_ENDS, G_TYPE_INT, 1, G_TYPE_BOOLEAN, TRUE); gtk_binding_entry_add_signal (binding_set, GDK_KEY_slash, GDK_CONTROL_MASK, "move-cursor", 3, G_TYPE_ENUM, GTK_MOVEMENT_PARAGRAPH_ENDS, G_TYPE_INT, -1, G_TYPE_BOOLEAN, FALSE); gtk_binding_entry_add_signal (binding_set, GDK_KEY_slash, GDK_CONTROL_MASK, "move-cursor", 3, G_TYPE_ENUM, GTK_MOVEMENT_PARAGRAPH_ENDS, G_TYPE_INT, 1, G_TYPE_BOOLEAN, TRUE); /* unselect all */ gtk_binding_entry_add_signal (binding_set, GDK_KEY_a, GDK_SHIFT_MASK | GDK_CONTROL_MASK, "move-cursor", 3, G_TYPE_ENUM, GTK_MOVEMENT_PARAGRAPH_ENDS, G_TYPE_INT, 0, G_TYPE_BOOLEAN, FALSE); gtk_binding_entry_add_signal (binding_set, GDK_KEY_backslash, GDK_CONTROL_MASK, "move-cursor", 3, G_TYPE_ENUM, GTK_MOVEMENT_PARAGRAPH_ENDS, G_TYPE_INT, 0, G_TYPE_BOOLEAN, FALSE); add_move_binding (binding_set, GDK_KEY_f, GDK_MOD1_MASK, GTK_MOVEMENT_WORDS, 1); add_move_binding (binding_set, GDK_KEY_b, GDK_MOD1_MASK, GTK_MOVEMENT_WORDS, -1); add_move_binding (binding_set, GDK_KEY_Home, 0, GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1); add_move_binding (binding_set, GDK_KEY_End, 0, GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1); add_move_binding (binding_set, GDK_KEY_KP_Home, 0, GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1); add_move_binding (binding_set, GDK_KEY_KP_End, 0, GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1); add_move_binding (binding_set, GDK_KEY_Home, GDK_CONTROL_MASK, GTK_MOVEMENT_BUFFER_ENDS, -1); add_move_binding (binding_set, GDK_KEY_End, GDK_CONTROL_MASK, GTK_MOVEMENT_BUFFER_ENDS, 1); add_move_binding (binding_set, GDK_KEY_KP_Home, GDK_CONTROL_MASK, GTK_MOVEMENT_BUFFER_ENDS, -1); add_move_binding (binding_set, GDK_KEY_KP_End, GDK_CONTROL_MASK, GTK_MOVEMENT_BUFFER_ENDS, 1); /* copy */ gtk_binding_entry_add_signal (binding_set, GDK_KEY_c, GDK_CONTROL_MASK, "copy-clipboard", 0); gtk_binding_entry_add_signal (binding_set, GDK_KEY_Return, 0, "activate-current-link", 0); gtk_binding_entry_add_signal (binding_set, GDK_KEY_ISO_Enter, 0, "activate-current-link", 0); gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Enter, 0, "activate-current-link", 0); g_type_class_add_private (class, sizeof (GtkLabelPrivate)); } static void gtk_label_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkLabel *label = GTK_LABEL (object); switch (prop_id) { case PROP_LABEL: gtk_label_set_label (label, g_value_get_string (value)); break; case PROP_ATTRIBUTES: gtk_label_set_attributes (label, g_value_get_boxed (value)); break; case PROP_USE_MARKUP: gtk_label_set_use_markup (label, g_value_get_boolean (value)); break; case PROP_USE_UNDERLINE: gtk_label_set_use_underline (label, g_value_get_boolean (value)); break; case PROP_JUSTIFY: gtk_label_set_justify (label, g_value_get_enum (value)); break; case PROP_PATTERN: gtk_label_set_pattern (label, g_value_get_string (value)); break; case PROP_WRAP: gtk_label_set_line_wrap (label, g_value_get_boolean (value)); break; case PROP_WRAP_MODE: gtk_label_set_line_wrap_mode (label, g_value_get_enum (value)); break; case PROP_SELECTABLE: gtk_label_set_selectable (label, g_value_get_boolean (value)); break; case PROP_MNEMONIC_WIDGET: gtk_label_set_mnemonic_widget (label, (GtkWidget*) g_value_get_object (value)); break; case PROP_ELLIPSIZE: gtk_label_set_ellipsize (label, g_value_get_enum (value)); break; case PROP_WIDTH_CHARS: gtk_label_set_width_chars (label, g_value_get_int (value)); break; case PROP_SINGLE_LINE_MODE: gtk_label_set_single_line_mode (label, g_value_get_boolean (value)); break; case PROP_ANGLE: gtk_label_set_angle (label, g_value_get_double (value)); break; case PROP_MAX_WIDTH_CHARS: gtk_label_set_max_width_chars (label, g_value_get_int (value)); break; case PROP_TRACK_VISITED_LINKS: gtk_label_set_track_visited_links (label, g_value_get_boolean (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_label_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkLabel *label = GTK_LABEL (object); GtkLabelPrivate *priv = label->priv; switch (prop_id) { case PROP_LABEL: g_value_set_string (value, priv->label); break; case PROP_ATTRIBUTES: g_value_set_boxed (value, priv->attrs); break; case PROP_USE_MARKUP: g_value_set_boolean (value, priv->use_markup); break; case PROP_USE_UNDERLINE: g_value_set_boolean (value, priv->use_underline); break; case PROP_JUSTIFY: g_value_set_enum (value, priv->jtype); break; case PROP_WRAP: g_value_set_boolean (value, priv->wrap); break; case PROP_WRAP_MODE: g_value_set_enum (value, priv->wrap_mode); break; case PROP_SELECTABLE: g_value_set_boolean (value, gtk_label_get_selectable (label)); break; case PROP_MNEMONIC_KEYVAL: g_value_set_uint (value, priv->mnemonic_keyval); break; case PROP_MNEMONIC_WIDGET: g_value_set_object (value, (GObject*) priv->mnemonic_widget); break; case PROP_CURSOR_POSITION: if (priv->select_info && priv->select_info->selectable) { gint offset = g_utf8_pointer_to_offset (priv->text, priv->text + priv->select_info->selection_end); g_value_set_int (value, offset); } else g_value_set_int (value, 0); break; case PROP_SELECTION_BOUND: if (priv->select_info && priv->select_info->selectable) { gint offset = g_utf8_pointer_to_offset (priv->text, priv->text + priv->select_info->selection_anchor); g_value_set_int (value, offset); } else g_value_set_int (value, 0); break; case PROP_ELLIPSIZE: g_value_set_enum (value, priv->ellipsize); break; case PROP_WIDTH_CHARS: g_value_set_int (value, gtk_label_get_width_chars (label)); break; case PROP_SINGLE_LINE_MODE: g_value_set_boolean (value, gtk_label_get_single_line_mode (label)); break; case PROP_ANGLE: g_value_set_double (value, gtk_label_get_angle (label)); break; case PROP_MAX_WIDTH_CHARS: g_value_set_int (value, gtk_label_get_max_width_chars (label)); break; case PROP_TRACK_VISITED_LINKS: g_value_set_boolean (value, gtk_label_get_track_visited_links (label)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_label_init (GtkLabel *label) { GtkLabelPrivate *priv; label->priv = G_TYPE_INSTANCE_GET_PRIVATE (label, GTK_TYPE_LABEL, GtkLabelPrivate); priv = label->priv; gtk_widget_set_has_window (GTK_WIDGET (label), FALSE); priv->width_chars = -1; priv->max_width_chars = -1; priv->wrap_width = -1; priv->label = NULL; priv->jtype = GTK_JUSTIFY_LEFT; priv->wrap = FALSE; priv->wrap_mode = PANGO_WRAP_WORD; priv->ellipsize = PANGO_ELLIPSIZE_NONE; priv->use_underline = FALSE; priv->use_markup = FALSE; priv->pattern_set = FALSE; priv->track_links = TRUE; priv->mnemonic_keyval = GDK_KEY_VoidSymbol; priv->layout = NULL; priv->text = NULL; priv->attrs = NULL; priv->mnemonic_widget = NULL; priv->mnemonic_window = NULL; priv->mnemonics_visible = TRUE; gtk_label_set_text (label, ""); } static void gtk_label_buildable_interface_init (GtkBuildableIface *iface) { buildable_parent_iface = g_type_interface_peek_parent (iface); iface->custom_tag_start = gtk_label_buildable_custom_tag_start; iface->custom_finished = gtk_label_buildable_custom_finished; } typedef struct { GtkBuilder *builder; GObject *object; PangoAttrList *attrs; } PangoParserData; static PangoAttribute * attribute_from_text (GtkBuilder *builder, const gchar *name, const gchar *value, GError **error) { PangoAttribute *attribute = NULL; PangoAttrType type; PangoLanguage *language; PangoFontDescription *font_desc; GdkColor *color; GValue val = { 0, }; if (!gtk_builder_value_from_string_type (builder, PANGO_TYPE_ATTR_TYPE, name, &val, error)) return NULL; type = g_value_get_enum (&val); g_value_unset (&val); switch (type) { /* PangoAttrLanguage */ case PANGO_ATTR_LANGUAGE: if ((language = pango_language_from_string (value))) { attribute = pango_attr_language_new (language); g_value_init (&val, G_TYPE_INT); } break; /* PangoAttrInt */ case PANGO_ATTR_STYLE: if (gtk_builder_value_from_string_type (builder, PANGO_TYPE_STYLE, value, &val, error)) attribute = pango_attr_style_new (g_value_get_enum (&val)); break; case PANGO_ATTR_WEIGHT: if (gtk_builder_value_from_string_type (builder, PANGO_TYPE_WEIGHT, value, &val, error)) attribute = pango_attr_weight_new (g_value_get_enum (&val)); break; case PANGO_ATTR_VARIANT: if (gtk_builder_value_from_string_type (builder, PANGO_TYPE_VARIANT, value, &val, error)) attribute = pango_attr_variant_new (g_value_get_enum (&val)); break; case PANGO_ATTR_STRETCH: if (gtk_builder_value_from_string_type (builder, PANGO_TYPE_STRETCH, value, &val, error)) attribute = pango_attr_stretch_new (g_value_get_enum (&val)); break; case PANGO_ATTR_UNDERLINE: if (gtk_builder_value_from_string_type (builder, G_TYPE_BOOLEAN, value, &val, error)) attribute = pango_attr_underline_new (g_value_get_boolean (&val)); break; case PANGO_ATTR_STRIKETHROUGH: if (gtk_builder_value_from_string_type (builder, G_TYPE_BOOLEAN, value, &val, error)) attribute = pango_attr_strikethrough_new (g_value_get_boolean (&val)); break; case PANGO_ATTR_GRAVITY: if (gtk_builder_value_from_string_type (builder, PANGO_TYPE_GRAVITY, value, &val, error)) attribute = pango_attr_gravity_new (g_value_get_enum (&val)); break; case PANGO_ATTR_GRAVITY_HINT: if (gtk_builder_value_from_string_type (builder, PANGO_TYPE_GRAVITY_HINT, value, &val, error)) attribute = pango_attr_gravity_hint_new (g_value_get_enum (&val)); break; /* PangoAttrString */ case PANGO_ATTR_FAMILY: attribute = pango_attr_family_new (value); g_value_init (&val, G_TYPE_INT); break; /* PangoAttrSize */ case PANGO_ATTR_SIZE: if (gtk_builder_value_from_string_type (builder, G_TYPE_INT, value, &val, error)) attribute = pango_attr_size_new (g_value_get_int (&val)); break; case PANGO_ATTR_ABSOLUTE_SIZE: if (gtk_builder_value_from_string_type (builder, G_TYPE_INT, value, &val, error)) attribute = pango_attr_size_new_absolute (g_value_get_int (&val)); break; /* PangoAttrFontDesc */ case PANGO_ATTR_FONT_DESC: if ((font_desc = pango_font_description_from_string (value))) { attribute = pango_attr_font_desc_new (font_desc); pango_font_description_free (font_desc); g_value_init (&val, G_TYPE_INT); } break; /* PangoAttrColor */ case PANGO_ATTR_FOREGROUND: if (gtk_builder_value_from_string_type (builder, GDK_TYPE_COLOR, value, &val, error)) { color = g_value_get_boxed (&val); attribute = pango_attr_foreground_new (color->red, color->green, color->blue); } break; case PANGO_ATTR_BACKGROUND: if (gtk_builder_value_from_string_type (builder, GDK_TYPE_COLOR, value, &val, error)) { color = g_value_get_boxed (&val); attribute = pango_attr_background_new (color->red, color->green, color->blue); } break; case PANGO_ATTR_UNDERLINE_COLOR: if (gtk_builder_value_from_string_type (builder, GDK_TYPE_COLOR, value, &val, error)) { color = g_value_get_boxed (&val); attribute = pango_attr_underline_color_new (color->red, color->green, color->blue); } break; case PANGO_ATTR_STRIKETHROUGH_COLOR: if (gtk_builder_value_from_string_type (builder, GDK_TYPE_COLOR, value, &val, error)) { color = g_value_get_boxed (&val); attribute = pango_attr_strikethrough_color_new (color->red, color->green, color->blue); } break; /* PangoAttrShape */ case PANGO_ATTR_SHAPE: /* Unsupported for now */ break; /* PangoAttrFloat */ case PANGO_ATTR_SCALE: if (gtk_builder_value_from_string_type (builder, G_TYPE_DOUBLE, value, &val, error)) attribute = pango_attr_scale_new (g_value_get_double (&val)); break; case PANGO_ATTR_INVALID: case PANGO_ATTR_LETTER_SPACING: case PANGO_ATTR_RISE: case PANGO_ATTR_FALLBACK: default: break; } g_value_unset (&val); return attribute; } static void pango_start_element (GMarkupParseContext *context, const gchar *element_name, const gchar **names, const gchar **values, gpointer user_data, GError **error) { PangoParserData *data = (PangoParserData*)user_data; GValue val = { 0, }; guint i; gint line_number, char_number; if (strcmp (element_name, "attribute") == 0) { PangoAttribute *attr = NULL; const gchar *name = NULL; const gchar *value = NULL; const gchar *start = NULL; const gchar *end = NULL; guint start_val = 0; guint end_val = G_MAXUINT; for (i = 0; names[i]; i++) { if (strcmp (names[i], "name") == 0) name = values[i]; else if (strcmp (names[i], "value") == 0) value = values[i]; else if (strcmp (names[i], "start") == 0) start = values[i]; else if (strcmp (names[i], "end") == 0) end = values[i]; else { g_markup_parse_context_get_position (context, &line_number, &char_number); g_set_error (error, GTK_BUILDER_ERROR, GTK_BUILDER_ERROR_INVALID_ATTRIBUTE, "%s:%d:%d '%s' is not a valid attribute of <%s>", "", line_number, char_number, names[i], "attribute"); return; } } if (!name || !value) { g_markup_parse_context_get_position (context, &line_number, &char_number); g_set_error (error, GTK_BUILDER_ERROR, GTK_BUILDER_ERROR_MISSING_ATTRIBUTE, "%s:%d:%d <%s> requires attribute \"%s\"", "", line_number, char_number, "attribute", name ? "value" : "name"); return; } if (start) { if (!gtk_builder_value_from_string_type (data->builder, G_TYPE_UINT, start, &val, error)) return; start_val = g_value_get_uint (&val); g_value_unset (&val); } if (end) { if (!gtk_builder_value_from_string_type (data->builder, G_TYPE_UINT, end, &val, error)) return; end_val = g_value_get_uint (&val); g_value_unset (&val); } attr = attribute_from_text (data->builder, name, value, error); attr->start_index = start_val; attr->end_index = end_val; if (attr) { if (!data->attrs) data->attrs = pango_attr_list_new (); pango_attr_list_insert (data->attrs, attr); } } else if (strcmp (element_name, "attributes") == 0) ; else g_warning ("Unsupported tag for GtkLabel: %s\n", element_name); } static const GMarkupParser pango_parser = { pango_start_element, }; static gboolean gtk_label_buildable_custom_tag_start (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const gchar *tagname, GMarkupParser *parser, gpointer *data) { if (buildable_parent_iface->custom_tag_start (buildable, builder, child, tagname, parser, data)) return TRUE; if (strcmp (tagname, "attributes") == 0) { PangoParserData *parser_data; parser_data = g_slice_new0 (PangoParserData); parser_data->builder = g_object_ref (builder); parser_data->object = g_object_ref (buildable); *parser = pango_parser; *data = parser_data; return TRUE; } return FALSE; } static void gtk_label_buildable_custom_finished (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const gchar *tagname, gpointer user_data) { PangoParserData *data; buildable_parent_iface->custom_finished (buildable, builder, child, tagname, user_data); if (strcmp (tagname, "attributes") == 0) { data = (PangoParserData*)user_data; if (data->attrs) { gtk_label_set_attributes (GTK_LABEL (buildable), data->attrs); pango_attr_list_unref (data->attrs); } g_object_unref (data->object); g_object_unref (data->builder); g_slice_free (PangoParserData, data); } } /** * gtk_label_new: * @str: The text of the label * * Creates a new label with the given text inside it. You can * pass %NULL to get an empty label widget. * * Return value: the new #GtkLabel **/ GtkWidget* gtk_label_new (const gchar *str) { GtkLabel *label; label = g_object_new (GTK_TYPE_LABEL, NULL); if (str && *str) gtk_label_set_text (label, str); return GTK_WIDGET (label); } /** * gtk_label_new_with_mnemonic: * @str: The text of the label, with an underscore in front of the * mnemonic character * * Creates a new #GtkLabel, containing the text in @str. * * If characters in @str are preceded by an underscore, they are * underlined. If you need a literal underscore character in a label, use * '__' (two underscores). The first underlined character represents a * keyboard accelerator called a mnemonic. The mnemonic key can be used * to activate another widget, chosen automatically, or explicitly using * gtk_label_set_mnemonic_widget(). * * If gtk_label_set_mnemonic_widget() is not called, then the first * activatable ancestor of the #GtkLabel will be chosen as the mnemonic * widget. For instance, if the label is inside a button or menu item, * the button or menu item will automatically become the mnemonic widget * and be activated by the mnemonic. * * Return value: the new #GtkLabel **/ GtkWidget* gtk_label_new_with_mnemonic (const gchar *str) { GtkLabel *label; label = g_object_new (GTK_TYPE_LABEL, NULL); if (str && *str) gtk_label_set_text_with_mnemonic (label, str); return GTK_WIDGET (label); } static gboolean gtk_label_mnemonic_activate (GtkWidget *widget, gboolean group_cycling) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GtkWidget *parent; if (priv->mnemonic_widget) return gtk_widget_mnemonic_activate (priv->mnemonic_widget, group_cycling); /* Try to find the widget to activate by traversing the * widget's ancestry. */ parent = gtk_widget_get_parent (widget); if (GTK_IS_NOTEBOOK (parent)) return FALSE; while (parent) { if (gtk_widget_get_can_focus (parent) || (!group_cycling && GTK_WIDGET_GET_CLASS (parent)->activate_signal) || GTK_IS_NOTEBOOK (gtk_widget_get_parent (parent)) || GTK_IS_MENU_ITEM (parent)) return gtk_widget_mnemonic_activate (parent, group_cycling); parent = gtk_widget_get_parent (parent); } /* barf if there was nothing to activate */ g_warning ("Couldn't find a target for a mnemonic activation."); gtk_widget_error_bell (widget); return FALSE; } static void gtk_label_setup_mnemonic (GtkLabel *label, guint last_key) { GtkLabelPrivate *priv = label->priv; GtkWidget *widget = GTK_WIDGET (label); GtkWidget *toplevel; GtkWidget *mnemonic_menu; mnemonic_menu = g_object_get_data (G_OBJECT (label), "gtk-mnemonic-menu"); if (last_key != GDK_KEY_VoidSymbol) { if (priv->mnemonic_window) { gtk_window_remove_mnemonic (priv->mnemonic_window, last_key, widget); priv->mnemonic_window = NULL; } if (mnemonic_menu) { _gtk_menu_shell_remove_mnemonic (GTK_MENU_SHELL (mnemonic_menu), last_key, widget); mnemonic_menu = NULL; } } if (priv->mnemonic_keyval == GDK_KEY_VoidSymbol) goto done; connect_mnemonics_visible_notify (GTK_LABEL (widget)); toplevel = gtk_widget_get_toplevel (widget); if (gtk_widget_is_toplevel (toplevel)) { GtkWidget *menu_shell; menu_shell = gtk_widget_get_ancestor (widget, GTK_TYPE_MENU_SHELL); if (menu_shell) { _gtk_menu_shell_add_mnemonic (GTK_MENU_SHELL (menu_shell), priv->mnemonic_keyval, widget); mnemonic_menu = menu_shell; } if (!GTK_IS_MENU (menu_shell)) { gtk_window_add_mnemonic (GTK_WINDOW (toplevel), priv->mnemonic_keyval, widget); priv->mnemonic_window = GTK_WINDOW (toplevel); } } done: g_object_set_data (G_OBJECT (label), I_("gtk-mnemonic-menu"), mnemonic_menu); } static void gtk_label_hierarchy_changed (GtkWidget *widget, GtkWidget *old_toplevel) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; gtk_label_setup_mnemonic (label, priv->mnemonic_keyval); } static void label_shortcut_setting_apply (GtkLabel *label) { gtk_label_recalculate (label); if (GTK_IS_ACCEL_LABEL (label)) gtk_accel_label_refetch (GTK_ACCEL_LABEL (label)); } static void label_shortcut_setting_traverse_container (GtkWidget *widget, gpointer data) { if (GTK_IS_LABEL (widget)) label_shortcut_setting_apply (GTK_LABEL (widget)); else if (GTK_IS_CONTAINER (widget)) gtk_container_forall (GTK_CONTAINER (widget), label_shortcut_setting_traverse_container, data); } static void label_shortcut_setting_changed (GtkSettings *settings) { GList *list, *l; list = gtk_window_list_toplevels (); for (l = list; l ; l = l->next) { GtkWidget *widget = l->data; if (gtk_widget_get_settings (widget) == settings) gtk_container_forall (GTK_CONTAINER (widget), label_shortcut_setting_traverse_container, NULL); } g_list_free (list); } static void mnemonics_visible_apply (GtkWidget *widget, gboolean mnemonics_visible) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; mnemonics_visible = mnemonics_visible != FALSE; if (priv->mnemonics_visible != mnemonics_visible) { priv->mnemonics_visible = mnemonics_visible; gtk_label_recalculate (label); } } static void label_mnemonics_visible_traverse_container (GtkWidget *widget, gpointer data) { gboolean mnemonics_visible = GPOINTER_TO_INT (data); _gtk_label_mnemonics_visible_apply_recursively (widget, mnemonics_visible); } void _gtk_label_mnemonics_visible_apply_recursively (GtkWidget *widget, gboolean mnemonics_visible) { if (GTK_IS_LABEL (widget)) mnemonics_visible_apply (widget, mnemonics_visible); else if (GTK_IS_CONTAINER (widget)) gtk_container_forall (GTK_CONTAINER (widget), label_mnemonics_visible_traverse_container, GINT_TO_POINTER (mnemonics_visible)); } static void label_mnemonics_visible_changed (GtkWindow *window, GParamSpec *pspec, gpointer data) { gboolean mnemonics_visible; g_object_get (window, "mnemonics-visible", &mnemonics_visible, NULL); gtk_container_forall (GTK_CONTAINER (window), label_mnemonics_visible_traverse_container, GINT_TO_POINTER (mnemonics_visible)); } static void gtk_label_screen_changed (GtkWidget *widget, GdkScreen *old_screen) { GtkSettings *settings; gboolean shortcuts_connected; if (!gtk_widget_has_screen (widget)) return; settings = gtk_widget_get_settings (widget); shortcuts_connected = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (settings), "gtk-label-shortcuts-connected")); if (! shortcuts_connected) { g_signal_connect (settings, "notify::gtk-enable-mnemonics", G_CALLBACK (label_shortcut_setting_changed), NULL); g_signal_connect (settings, "notify::gtk-enable-accels", G_CALLBACK (label_shortcut_setting_changed), NULL); g_object_set_data (G_OBJECT (settings), "gtk-label-shortcuts-connected", GINT_TO_POINTER (TRUE)); } label_shortcut_setting_apply (GTK_LABEL (widget)); } static void label_mnemonic_widget_weak_notify (gpointer data, GObject *where_the_object_was) { GtkLabel *label = data; GtkLabelPrivate *priv = label->priv; priv->mnemonic_widget = NULL; g_object_notify (G_OBJECT (label), "mnemonic-widget"); } /** * gtk_label_set_mnemonic_widget: * @label: a #GtkLabel * @widget: (allow-none): the target #GtkWidget * * If the label has been set so that it has an mnemonic key (using * i.e. gtk_label_set_markup_with_mnemonic(), * gtk_label_set_text_with_mnemonic(), gtk_label_new_with_mnemonic() * or the "use_underline" property) the label can be associated with a * widget that is the target of the mnemonic. When the label is inside * a widget (like a #GtkButton or a #GtkNotebook tab) it is * automatically associated with the correct widget, but sometimes * (i.e. when the target is a #GtkEntry next to the label) you need to * set it explicitly using this function. * * The target widget will be accelerated by emitting the * GtkWidget::mnemonic-activate signal on it. The default handler for * this signal will activate the widget if there are no mnemonic collisions * and toggle focus between the colliding widgets otherwise. **/ void gtk_label_set_mnemonic_widget (GtkLabel *label, GtkWidget *widget) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; if (widget) g_return_if_fail (GTK_IS_WIDGET (widget)); if (priv->mnemonic_widget) { gtk_widget_remove_mnemonic_label (priv->mnemonic_widget, GTK_WIDGET (label)); g_object_weak_unref (G_OBJECT (priv->mnemonic_widget), label_mnemonic_widget_weak_notify, label); } priv->mnemonic_widget = widget; if (priv->mnemonic_widget) { g_object_weak_ref (G_OBJECT (priv->mnemonic_widget), label_mnemonic_widget_weak_notify, label); gtk_widget_add_mnemonic_label (priv->mnemonic_widget, GTK_WIDGET (label)); } g_object_notify (G_OBJECT (label), "mnemonic-widget"); } /** * gtk_label_get_mnemonic_widget: * @label: a #GtkLabel * * Retrieves the target of the mnemonic (keyboard shortcut) of this * label. See gtk_label_set_mnemonic_widget(). * * Return value: (transfer none): the target of the label's mnemonic, * or %NULL if none has been set and the default algorithm will be used. **/ GtkWidget * gtk_label_get_mnemonic_widget (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), NULL); return label->priv->mnemonic_widget; } /** * gtk_label_get_mnemonic_keyval: * @label: a #GtkLabel * * If the label has been set so that it has an mnemonic key this function * returns the keyval used for the mnemonic accelerator. If there is no * mnemonic set up it returns #GDK_VoidSymbol. * * Returns: GDK keyval usable for accelerators, or #GDK_VoidSymbol **/ guint gtk_label_get_mnemonic_keyval (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), GDK_KEY_VoidSymbol); return label->priv->mnemonic_keyval; } static void gtk_label_set_text_internal (GtkLabel *label, gchar *str) { GtkLabelPrivate *priv = label->priv; g_free (priv->text); priv->text = str; gtk_label_select_region_index (label, 0, 0); } static void gtk_label_set_label_internal (GtkLabel *label, gchar *str) { GtkLabelPrivate *priv = label->priv; g_free (priv->label); priv->label = str; g_object_notify (G_OBJECT (label), "label"); } static void gtk_label_set_use_markup_internal (GtkLabel *label, gboolean val) { GtkLabelPrivate *priv = label->priv; val = val != FALSE; if (priv->use_markup != val) { priv->use_markup = val; g_object_notify (G_OBJECT (label), "use-markup"); } } static void gtk_label_set_use_underline_internal (GtkLabel *label, gboolean val) { GtkLabelPrivate *priv = label->priv; val = val != FALSE; if (priv->use_underline != val) { priv->use_underline = val; g_object_notify (G_OBJECT (label), "use-underline"); } } static void gtk_label_compose_effective_attrs (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; PangoAttrIterator *iter; PangoAttribute *attr; GSList *iter_attrs, *l; if (priv->attrs) { if (priv->effective_attrs) { if ((iter = pango_attr_list_get_iterator (priv->attrs))) { do { iter_attrs = pango_attr_iterator_get_attrs (iter); for (l = iter_attrs; l; l = l->next) { attr = l->data; pango_attr_list_insert (priv->effective_attrs, attr); } g_slist_free (iter_attrs); } while (pango_attr_iterator_next (iter)); pango_attr_iterator_destroy (iter); } } else priv->effective_attrs = pango_attr_list_ref (priv->attrs); } } static void gtk_label_set_attributes_internal (GtkLabel *label, PangoAttrList *attrs) { GtkLabelPrivate *priv = label->priv; if (attrs) pango_attr_list_ref (attrs); if (priv->attrs) pango_attr_list_unref (priv->attrs); priv->attrs = attrs; g_object_notify (G_OBJECT (label), "attributes"); } /* Calculates text, attrs and mnemonic_keyval from * label, use_underline and use_markup */ static void gtk_label_recalculate (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; guint keyval = priv->mnemonic_keyval; if (priv->use_markup) gtk_label_set_markup_internal (label, priv->label, priv->use_underline); else { if (priv->use_underline) gtk_label_set_uline_text_internal (label, priv->label); else { if (priv->effective_attrs) pango_attr_list_unref (priv->effective_attrs); priv->effective_attrs = NULL; gtk_label_set_text_internal (label, g_strdup (priv->label)); } } gtk_label_compose_effective_attrs (label); if (!priv->use_underline) priv->mnemonic_keyval = GDK_KEY_VoidSymbol; if (keyval != priv->mnemonic_keyval) { gtk_label_setup_mnemonic (label, keyval); g_object_notify (G_OBJECT (label), "mnemonic-keyval"); } gtk_label_clear_layout (label); gtk_label_clear_select_info (label); gtk_widget_queue_resize (GTK_WIDGET (label)); } /** * gtk_label_set_text: * @label: a #GtkLabel * @str: The text you want to set * * Sets the text within the #GtkLabel widget. It overwrites any text that * was there before. * * This will also clear any previously set mnemonic accelerators. **/ void gtk_label_set_text (GtkLabel *label, const gchar *str) { g_return_if_fail (GTK_IS_LABEL (label)); g_object_freeze_notify (G_OBJECT (label)); gtk_label_set_label_internal (label, g_strdup (str ? str : "")); gtk_label_set_use_markup_internal (label, FALSE); gtk_label_set_use_underline_internal (label, FALSE); gtk_label_recalculate (label); g_object_thaw_notify (G_OBJECT (label)); } /** * gtk_label_set_attributes: * @label: a #GtkLabel * @attrs: a #PangoAttrList * * Sets a #PangoAttrList; the attributes in the list are applied to the * label text. * * The attributes set with this function will be applied * and merged with any other attributes previously effected by way * of the #GtkLabel:use-underline or #GtkLabel:use-markup properties. * While it is not recommended to mix markup strings with manually set * attributes, if you must; know that the attributes will be applied * to the label after the markup string is parsed. **/ void gtk_label_set_attributes (GtkLabel *label, PangoAttrList *attrs) { g_return_if_fail (GTK_IS_LABEL (label)); gtk_label_set_attributes_internal (label, attrs); gtk_label_recalculate (label); gtk_label_clear_layout (label); gtk_widget_queue_resize (GTK_WIDGET (label)); } /** * gtk_label_get_attributes: * @label: a #GtkLabel * * Gets the attribute list that was set on the label using * gtk_label_set_attributes(), if any. This function does * not reflect attributes that come from the labels markup * (see gtk_label_set_markup()). If you want to get the * effective attributes for the label, use * pango_layout_get_attribute (gtk_label_get_layout (label)). * * Return value: (transfer none): the attribute list, or %NULL * if none was set. **/ PangoAttrList * gtk_label_get_attributes (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), NULL); return label->priv->attrs; } /** * gtk_label_set_label: * @label: a #GtkLabel * @str: the new text to set for the label * * Sets the text of the label. The label is interpreted as * including embedded underlines and/or Pango markup depending * on the values of the #GtkLabel:use-underline" and * #GtkLabel:use-markup properties. **/ void gtk_label_set_label (GtkLabel *label, const gchar *str) { g_return_if_fail (GTK_IS_LABEL (label)); g_object_freeze_notify (G_OBJECT (label)); gtk_label_set_label_internal (label, g_strdup (str ? str : "")); gtk_label_recalculate (label); g_object_thaw_notify (G_OBJECT (label)); } /** * gtk_label_get_label: * @label: a #GtkLabel * * Fetches the text from a label widget including any embedded * underlines indicating mnemonics and Pango markup. (See * gtk_label_get_text()). * * Return value: the text of the label widget. This string is * owned by the widget and must not be modified or freed. **/ G_CONST_RETURN gchar * gtk_label_get_label (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), NULL); return label->priv->label; } typedef struct { GtkLabel *label; GList *links; GString *new_str; GdkColor *link_color; GdkColor *visited_link_color; } UriParserData; static void start_element_handler (GMarkupParseContext *context, const gchar *element_name, const gchar **attribute_names, const gchar **attribute_values, gpointer user_data, GError **error) { GtkLabelPrivate *priv; UriParserData *pdata = user_data; if (strcmp (element_name, "a") == 0) { GtkLabelLink *link; const gchar *uri = NULL; const gchar *title = NULL; gboolean visited = FALSE; gint line_number; gint char_number; gint i; GdkColor *color = NULL; g_markup_parse_context_get_position (context, &line_number, &char_number); for (i = 0; attribute_names[i] != NULL; i++) { const gchar *attr = attribute_names[i]; if (strcmp (attr, "href") == 0) uri = attribute_values[i]; else if (strcmp (attr, "title") == 0) title = attribute_values[i]; else { g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE, "Attribute '%s' is not allowed on the tag " "on line %d char %d", attr, line_number, char_number); return; } } if (uri == NULL) { g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT, "Attribute 'href' was missing on the tag " "on line %d char %d", line_number, char_number); return; } visited = FALSE; priv = pdata->label->priv; if (priv->track_links && priv->select_info) { GList *l; for (l = priv->select_info->links; l; l = l->next) { link = l->data; if (strcmp (uri, link->uri) == 0) { visited = link->visited; break; } } } if (visited) color = pdata->visited_link_color; else color = pdata->link_color; g_string_append_printf (pdata->new_str, "", color->red, color->green, color->blue); link = g_new0 (GtkLabelLink, 1); link->uri = g_strdup (uri); link->title = g_strdup (title); link->visited = visited; pdata->links = g_list_append (pdata->links, link); } else { gint i; g_string_append_c (pdata->new_str, '<'); g_string_append (pdata->new_str, element_name); for (i = 0; attribute_names[i] != NULL; i++) { const gchar *attr = attribute_names[i]; const gchar *value = attribute_values[i]; gchar *newvalue; newvalue = g_markup_escape_text (value, -1); g_string_append_c (pdata->new_str, ' '); g_string_append (pdata->new_str, attr); g_string_append (pdata->new_str, "=\""); g_string_append (pdata->new_str, newvalue); g_string_append_c (pdata->new_str, '\"'); g_free (newvalue); } g_string_append_c (pdata->new_str, '>'); } } static void end_element_handler (GMarkupParseContext *context, const gchar *element_name, gpointer user_data, GError **error) { UriParserData *pdata = user_data; if (!strcmp (element_name, "a")) g_string_append (pdata->new_str, ""); else { g_string_append (pdata->new_str, "new_str, element_name); g_string_append_c (pdata->new_str, '>'); } } static void text_handler (GMarkupParseContext *context, const gchar *text, gsize text_len, gpointer user_data, GError **error) { UriParserData *pdata = user_data; gchar *newtext; newtext = g_markup_escape_text (text, text_len); g_string_append (pdata->new_str, newtext); g_free (newtext); } static const GMarkupParser markup_parser = { start_element_handler, end_element_handler, text_handler, NULL, NULL }; static gboolean xml_isspace (gchar c) { return (c == ' ' || c == '\t' || c == '\n' || c == '\r'); } static void link_free (GtkLabelLink *link) { g_free (link->uri); g_free (link->title); g_free (link); } static void gtk_label_get_link_colors (GtkWidget *widget, GdkColor **link_color, GdkColor **visited_link_color) { GtkStyleContext *context; context = gtk_widget_get_style_context (widget); gtk_style_context_get_style (context, "link-color", link_color, "visited-link-color", visited_link_color, NULL); if (!*link_color) *link_color = gdk_color_copy (&default_link_color); if (!*visited_link_color) *visited_link_color = gdk_color_copy (&default_visited_link_color); } static gboolean parse_uri_markup (GtkLabel *label, const gchar *str, gchar **new_str, GList **links, GError **error) { GMarkupParseContext *context = NULL; const gchar *p, *end; gboolean needs_root = TRUE; gsize length; UriParserData pdata; length = strlen (str); p = str; end = str + length; pdata.label = label; pdata.links = NULL; pdata.new_str = g_string_sized_new (length); gtk_label_get_link_colors (GTK_WIDGET (label), &pdata.link_color, &pdata.visited_link_color); while (p != end && xml_isspace (*p)) p++; if (end - p >= 8 && strncmp (p, "", 8) == 0) needs_root = FALSE; context = g_markup_parse_context_new (&markup_parser, 0, &pdata, NULL); if (needs_root) { if (!g_markup_parse_context_parse (context, "", -1, error)) goto failed; } if (!g_markup_parse_context_parse (context, str, length, error)) goto failed; if (needs_root) { if (!g_markup_parse_context_parse (context, "", -1, error)) goto failed; } if (!g_markup_parse_context_end_parse (context, error)) goto failed; g_markup_parse_context_free (context); *new_str = g_string_free (pdata.new_str, FALSE); *links = pdata.links; gdk_color_free (pdata.link_color); gdk_color_free (pdata.visited_link_color); return TRUE; failed: g_markup_parse_context_free (context); g_string_free (pdata.new_str, TRUE); g_list_foreach (pdata.links, (GFunc)link_free, NULL); g_list_free (pdata.links); gdk_color_free (pdata.link_color); gdk_color_free (pdata.visited_link_color); return FALSE; } static void gtk_label_ensure_has_tooltip (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; GList *l; gboolean has_tooltip = FALSE; for (l = priv->select_info->links; l; l = l->next) { GtkLabelLink *link = l->data; if (link->title) { has_tooltip = TRUE; break; } } gtk_widget_set_has_tooltip (GTK_WIDGET (label), has_tooltip); } static void gtk_label_set_markup_internal (GtkLabel *label, const gchar *str, gboolean with_uline) { GtkLabelPrivate *priv = label->priv; gchar *text = NULL; GError *error = NULL; PangoAttrList *attrs = NULL; gunichar accel_char = 0; gchar *new_str; GList *links = NULL; if (!parse_uri_markup (label, str, &new_str, &links, &error)) { g_warning ("Failed to set text from markup due to error parsing markup: %s", error->message); g_error_free (error); return; } gtk_label_clear_links (label); if (links) { gtk_label_ensure_select_info (label); priv->select_info->links = links; gtk_label_ensure_has_tooltip (label); } if (with_uline) { gboolean enable_mnemonics; gboolean auto_mnemonics; g_object_get (gtk_widget_get_settings (GTK_WIDGET (label)), "gtk-enable-mnemonics", &enable_mnemonics, "gtk-auto-mnemonics", &auto_mnemonics, NULL); if (!(enable_mnemonics && priv->mnemonics_visible && (!auto_mnemonics || (gtk_widget_is_sensitive (GTK_WIDGET (label)) && (!priv->mnemonic_widget || gtk_widget_is_sensitive (priv->mnemonic_widget)))))) { gchar *tmp; gchar *pattern; guint key; if (separate_uline_pattern (new_str, &key, &tmp, &pattern)) { g_free (new_str); new_str = tmp; g_free (pattern); } } } if (!pango_parse_markup (new_str, -1, with_uline ? '_' : 0, &attrs, &text, with_uline ? &accel_char : NULL, &error)) { g_warning ("Failed to set text from markup due to error parsing markup: %s", error->message); g_free (new_str); g_error_free (error); return; } g_free (new_str); if (text) gtk_label_set_text_internal (label, text); if (attrs) { if (priv->effective_attrs) pango_attr_list_unref (priv->effective_attrs); priv->effective_attrs = attrs; } if (accel_char != 0) priv->mnemonic_keyval = gdk_keyval_to_lower (gdk_unicode_to_keyval (accel_char)); else priv->mnemonic_keyval = GDK_KEY_VoidSymbol; } /** * gtk_label_set_markup: * @label: a #GtkLabel * @str: a markup string (see Pango markup format) * * Parses @str which is marked up with the Pango text markup language, setting the * label's text and attribute list based on the parse results. If the @str is * external data, you may need to escape it with g_markup_escape_text() or * g_markup_printf_escaped(): * |[ * char *markup; * * markup = g_markup_printf_escaped ("<span style=\"italic\">%s</span>", str); * gtk_label_set_markup (GTK_LABEL (label), markup); * g_free (markup); * ]| **/ void gtk_label_set_markup (GtkLabel *label, const gchar *str) { g_return_if_fail (GTK_IS_LABEL (label)); g_object_freeze_notify (G_OBJECT (label)); gtk_label_set_label_internal (label, g_strdup (str ? str : "")); gtk_label_set_use_markup_internal (label, TRUE); gtk_label_set_use_underline_internal (label, FALSE); gtk_label_recalculate (label); g_object_thaw_notify (G_OBJECT (label)); } /** * gtk_label_set_markup_with_mnemonic: * @label: a #GtkLabel * @str: a markup string (see * Pango markup format) * * Parses @str which is marked up with the * Pango text markup language, * setting the label's text and attribute list based on the parse results. * If characters in @str are preceded by an underscore, they are underlined * indicating that they represent a keyboard accelerator called a mnemonic. * * The mnemonic key can be used to activate another widget, chosen * automatically, or explicitly using gtk_label_set_mnemonic_widget(). */ void gtk_label_set_markup_with_mnemonic (GtkLabel *label, const gchar *str) { g_return_if_fail (GTK_IS_LABEL (label)); g_object_freeze_notify (G_OBJECT (label)); gtk_label_set_label_internal (label, g_strdup (str ? str : "")); gtk_label_set_use_markup_internal (label, TRUE); gtk_label_set_use_underline_internal (label, TRUE); gtk_label_recalculate (label); g_object_thaw_notify (G_OBJECT (label)); } /** * gtk_label_get_text: * @label: a #GtkLabel * * Fetches the text from a label widget, as displayed on the * screen. This does not include any embedded underlines * indicating mnemonics or Pango markup. (See gtk_label_get_label()) * * Return value: the text in the label widget. This is the internal * string used by the label, and must not be modified. **/ G_CONST_RETURN gchar * gtk_label_get_text (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), NULL); return label->priv->text; } static PangoAttrList * gtk_label_pattern_to_attrs (GtkLabel *label, const gchar *pattern) { GtkLabelPrivate *priv = label->priv; const char *start; const char *p = priv->text; const char *q = pattern; PangoAttrList *attrs; attrs = pango_attr_list_new (); while (1) { while (*p && *q && *q != '_') { p = g_utf8_next_char (p); q++; } start = p; while (*p && *q && *q == '_') { p = g_utf8_next_char (p); q++; } if (p > start) { PangoAttribute *attr = pango_attr_underline_new (PANGO_UNDERLINE_LOW); attr->start_index = start - priv->text; attr->end_index = p - priv->text; pango_attr_list_insert (attrs, attr); } else break; } return attrs; } static void gtk_label_set_pattern_internal (GtkLabel *label, const gchar *pattern, gboolean is_mnemonic) { GtkLabelPrivate *priv = label->priv; PangoAttrList *attrs; gboolean enable_mnemonics; gboolean auto_mnemonics; if (priv->pattern_set) return; if (is_mnemonic) { g_object_get (gtk_widget_get_settings (GTK_WIDGET (label)), "gtk-enable-mnemonics", &enable_mnemonics, "gtk-auto-mnemonics", &auto_mnemonics, NULL); if (enable_mnemonics && priv->mnemonics_visible && pattern && (!auto_mnemonics || (gtk_widget_is_sensitive (GTK_WIDGET (label)) && (!priv->mnemonic_widget || gtk_widget_is_sensitive (priv->mnemonic_widget))))) attrs = gtk_label_pattern_to_attrs (label, pattern); else attrs = NULL; } else attrs = gtk_label_pattern_to_attrs (label, pattern); if (priv->effective_attrs) pango_attr_list_unref (priv->effective_attrs); priv->effective_attrs = attrs; } void gtk_label_set_pattern (GtkLabel *label, const gchar *pattern) { GtkLabelPrivate *priv = label->priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; priv->pattern_set = FALSE; if (pattern) { gtk_label_set_pattern_internal (label, pattern, FALSE); priv->pattern_set = TRUE; } else gtk_label_recalculate (label); gtk_label_clear_layout (label); gtk_widget_queue_resize (GTK_WIDGET (label)); } /** * gtk_label_set_justify: * @label: a #GtkLabel * @jtype: a #GtkJustification * * Sets the alignment of the lines in the text of the label relative to * each other. %GTK_JUSTIFY_LEFT is the default value when the * widget is first created with gtk_label_new(). If you instead want * to set the alignment of the label as a whole, use * gtk_misc_set_alignment() instead. gtk_label_set_justify() has no * effect on labels containing only a single line. **/ void gtk_label_set_justify (GtkLabel *label, GtkJustification jtype) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); g_return_if_fail (jtype >= GTK_JUSTIFY_LEFT && jtype <= GTK_JUSTIFY_FILL); priv = label->priv; if ((GtkJustification) priv->jtype != jtype) { priv->jtype = jtype; /* No real need to be this drastic, but easier than duplicating the code */ gtk_label_clear_layout (label); g_object_notify (G_OBJECT (label), "justify"); gtk_widget_queue_resize (GTK_WIDGET (label)); } } /** * gtk_label_get_justify: * @label: a #GtkLabel * * Returns the justification of the label. See gtk_label_set_justify(). * * Return value: #GtkJustification **/ GtkJustification gtk_label_get_justify (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), 0); return label->priv->jtype; } /** * gtk_label_set_ellipsize: * @label: a #GtkLabel * @mode: a #PangoEllipsizeMode * * Sets the mode used to ellipsize (add an ellipsis: "...") to the text * if there is not enough space to render the entire string. * * Since: 2.6 **/ void gtk_label_set_ellipsize (GtkLabel *label, PangoEllipsizeMode mode) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); g_return_if_fail (mode >= PANGO_ELLIPSIZE_NONE && mode <= PANGO_ELLIPSIZE_END); priv = label->priv; if ((PangoEllipsizeMode) priv->ellipsize != mode) { priv->ellipsize = mode; /* No real need to be this drastic, but easier than duplicating the code */ gtk_label_clear_layout (label); g_object_notify (G_OBJECT (label), "ellipsize"); gtk_widget_queue_resize (GTK_WIDGET (label)); } } /** * gtk_label_get_ellipsize: * @label: a #GtkLabel * * Returns the ellipsizing position of the label. See gtk_label_set_ellipsize(). * * Return value: #PangoEllipsizeMode * * Since: 2.6 **/ PangoEllipsizeMode gtk_label_get_ellipsize (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), PANGO_ELLIPSIZE_NONE); return label->priv->ellipsize; } /** * gtk_label_set_width_chars: * @label: a #GtkLabel * @n_chars: the new desired width, in characters. * * Sets the desired width in characters of @label to @n_chars. * * Since: 2.6 **/ void gtk_label_set_width_chars (GtkLabel *label, gint n_chars) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; if (priv->width_chars != n_chars) { priv->width_chars = n_chars; g_object_notify (G_OBJECT (label), "width-chars"); gtk_label_invalidate_wrap_width (label); gtk_widget_queue_resize (GTK_WIDGET (label)); } } /** * gtk_label_get_width_chars: * @label: a #GtkLabel * * Retrieves the desired width of @label, in characters. See * gtk_label_set_width_chars(). * * Return value: the width of the label in characters. * * Since: 2.6 **/ gint gtk_label_get_width_chars (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), -1); return label->priv->width_chars; } /** * gtk_label_set_max_width_chars: * @label: a #GtkLabel * @n_chars: the new desired maximum width, in characters. * * Sets the desired maximum width in characters of @label to @n_chars. * * Since: 2.6 **/ void gtk_label_set_max_width_chars (GtkLabel *label, gint n_chars) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; if (priv->max_width_chars != n_chars) { priv->max_width_chars = n_chars; g_object_notify (G_OBJECT (label), "max-width-chars"); gtk_label_invalidate_wrap_width (label); gtk_widget_queue_resize (GTK_WIDGET (label)); } } /** * gtk_label_get_max_width_chars: * @label: a #GtkLabel * * Retrieves the desired maximum width of @label, in characters. See * gtk_label_set_width_chars(). * * Return value: the maximum width of the label in characters. * * Since: 2.6 **/ gint gtk_label_get_max_width_chars (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), -1); return label->priv->max_width_chars; } /** * gtk_label_set_line_wrap: * @label: a #GtkLabel * @wrap: the setting * * Toggles line wrapping within the #GtkLabel widget. %TRUE makes it break * lines if text exceeds the widget's size. %FALSE lets the text get cut off * by the edge of the widget if it exceeds the widget size. * * Note that setting line wrapping to %TRUE does not make the label * wrap at its parent container's width, because GTK+ widgets * conceptually can't make their requisition depend on the parent * container's size. For a label that wraps at a specific position, * set the label's width using gtk_widget_set_size_request(). **/ void gtk_label_set_line_wrap (GtkLabel *label, gboolean wrap) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; wrap = wrap != FALSE; if (priv->wrap != wrap) { priv->wrap = wrap; gtk_label_clear_layout (label); gtk_widget_queue_resize (GTK_WIDGET (label)); g_object_notify (G_OBJECT (label), "wrap"); } } /** * gtk_label_get_line_wrap: * @label: a #GtkLabel * * Returns whether lines in the label are automatically wrapped. * See gtk_label_set_line_wrap(). * * Return value: %TRUE if the lines of the label are automatically wrapped. */ gboolean gtk_label_get_line_wrap (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); return label->priv->wrap; } /** * gtk_label_set_line_wrap_mode: * @label: a #GtkLabel * @wrap_mode: the line wrapping mode * * If line wrapping is on (see gtk_label_set_line_wrap()) this controls how * the line wrapping is done. The default is %PANGO_WRAP_WORD which means * wrap on word boundaries. * * Since: 2.10 **/ void gtk_label_set_line_wrap_mode (GtkLabel *label, PangoWrapMode wrap_mode) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; if (priv->wrap_mode != wrap_mode) { priv->wrap_mode = wrap_mode; g_object_notify (G_OBJECT (label), "wrap-mode"); gtk_widget_queue_resize (GTK_WIDGET (label)); } } /** * gtk_label_get_line_wrap_mode: * @label: a #GtkLabel * * Returns line wrap mode used by the label. See gtk_label_set_line_wrap_mode(). * * Return value: %TRUE if the lines of the label are automatically wrapped. * * Since: 2.10 */ PangoWrapMode gtk_label_get_line_wrap_mode (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); return label->priv->wrap_mode; } static void gtk_label_destroy (GtkWidget *widget) { GtkLabel *label = GTK_LABEL (widget); gtk_label_set_mnemonic_widget (label, NULL); GTK_WIDGET_CLASS (gtk_label_parent_class)->destroy (widget); } static void gtk_label_finalize (GObject *object) { GtkLabel *label = GTK_LABEL (object); GtkLabelPrivate *priv = label->priv; g_free (priv->label); g_free (priv->text); if (priv->layout) g_object_unref (priv->layout); if (priv->attrs) pango_attr_list_unref (priv->attrs); if (priv->effective_attrs) pango_attr_list_unref (priv->effective_attrs); gtk_label_clear_links (label); g_free (priv->select_info); G_OBJECT_CLASS (gtk_label_parent_class)->finalize (object); } static void gtk_label_clear_layout (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; if (priv->layout) { g_object_unref (priv->layout); priv->layout = NULL; //gtk_label_clear_links (label); } } static PangoFontMetrics * get_font_metrics (PangoContext *context, GtkWidget *widget) { GtkStyleContext *style_context; PangoFontDescription *font; PangoFontMetrics *retval; style_context = gtk_widget_get_style_context (widget); gtk_style_context_get (style_context, 0, "font", &font, NULL); retval = pango_context_get_metrics (context, font, pango_context_get_language (context)); if (font != NULL) pango_font_description_free (font); return retval; } /** * gtk_label_get_measuring_layout: * @label: the label * @existing_layout: %NULL or an existing layout already in use. * @width: the width to measure with in pango units, or -1 for infinite * * Gets a layout that can be used for measuring sizes. The returned * layout will be identical to the label's layout except for the * layout's width, which will be set to @width. Do not modify the returned * layout. * * Returns: a new reference to a pango layout **/ static PangoLayout * gtk_label_get_measuring_layout (GtkLabel * label, PangoLayout *existing_layout, int width) { GtkLabelPrivate *priv = label->priv; PangoRectangle rect; PangoLayout *copy; if (existing_layout != NULL) { if (existing_layout != priv->layout) { pango_layout_set_width (existing_layout, width); return existing_layout; } g_object_unref (existing_layout); } gtk_label_ensure_layout (label); if (pango_layout_get_width (priv->layout) == width) { g_object_ref (priv->layout); return priv->layout; } /* We can use the label's own layout if we're not allocated a size yet, * because we don't need it to be properly setup at that point. * This way we can make use of caching upon the label's creation. */ if (gtk_widget_get_allocated_width (GTK_WIDGET (label)) <= 1) { g_object_ref (priv->layout); pango_layout_set_width (priv->layout, width); return priv->layout; } /* oftentimes we want to measure a width that is far wider than the current width, * even though the layout is not wrapped. In that case, we can just return the * current layout, because for measuring purposes, it will be identical. */ pango_layout_get_extents (priv->layout, NULL, &rect); if ((width == -1 || rect.width <= width) && !pango_layout_is_wrapped (priv->layout)) { g_object_ref (priv->layout); return priv->layout; } copy = pango_layout_copy (priv->layout); pango_layout_set_width (copy, width); return copy; } static void gtk_label_invalidate_wrap_width (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; priv->wrap_width = -1; } static gint get_label_wrap_width (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; if (priv->wrap_width < 0) { if (priv->width_chars > 0) { PangoLayout *layout; PangoContext *context; PangoFontMetrics *metrics; PangoRectangle rect; gint char_width, digit_width, char_pixels, text_width; layout = gtk_label_get_measuring_layout (label, NULL, -1); context = pango_layout_get_context (layout); metrics = get_font_metrics (context, GTK_WIDGET (label)); char_width = pango_font_metrics_get_approximate_char_width (metrics); digit_width = pango_font_metrics_get_approximate_digit_width (metrics); char_pixels = MAX (char_width, digit_width); pango_font_metrics_unref (metrics); pango_layout_get_extents (layout, NULL, &rect); g_object_unref (layout); text_width = rect.width; priv->wrap_width = PANGO_PIXELS (MAX (text_width, char_pixels * priv->width_chars)); } else { PangoLayout *layout; layout = gtk_widget_create_pango_layout (GTK_WIDGET (label), "This string is just about long enough."); pango_layout_get_size (layout, &priv->wrap_width, NULL); g_object_unref (layout); } } return priv->wrap_width; } static PangoLayout * gtk_label_get_layout_with_guessed_wrap_width (GtkLabel *label) { GdkScreen *screen; PangoRectangle logical_rect; gint wrap_width, width, height, longest_paragraph; PangoLayout *layout; if (!label->priv->wrap) return gtk_label_get_measuring_layout (label, NULL, -1); screen = gtk_widget_get_screen (GTK_WIDGET (label)); layout = gtk_label_get_measuring_layout (label, NULL, -1); pango_layout_get_extents (layout, NULL, &logical_rect); width = logical_rect.width; /* Try to guess a reasonable maximum width */ longest_paragraph = width; wrap_width = get_label_wrap_width (label); width = MIN (width, wrap_width); width = MIN (width, PANGO_SCALE * (gdk_screen_get_width (screen) + 1) / 2); layout = gtk_label_get_measuring_layout (label, layout, width); pango_layout_get_extents (layout, NULL, &logical_rect); width = logical_rect.width; height = logical_rect.height; /* Unfortunately, the above may leave us with a very unbalanced looking paragraph, * so we try short search for a narrower width that leaves us with the same height */ if (longest_paragraph > 0) { gint nlines, perfect_width; nlines = pango_layout_get_line_count (layout); perfect_width = (longest_paragraph + nlines - 1) / nlines; if (perfect_width < width) { layout = gtk_label_get_measuring_layout (label, layout, perfect_width); pango_layout_get_extents (layout, NULL, &logical_rect); if (logical_rect.height <= height) width = logical_rect.width; else { gint mid_width = (perfect_width + width) / 2; if (mid_width > perfect_width) { layout = gtk_label_get_measuring_layout (label, layout, mid_width); pango_layout_get_extents (layout, NULL, &logical_rect); if (logical_rect.height <= height) width = logical_rect.width; } } } } return gtk_label_get_measuring_layout (label, layout, width); } static void gtk_label_update_layout_width (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; GtkWidget *widget = GTK_WIDGET (label); GtkAllocation allocation; g_assert (priv->layout); gtk_widget_get_allocation (widget, &allocation); if (priv->ellipsize) { PangoRectangle logical; PangoRectangle bounds; gint xpad, ypad; gtk_misc_get_padding (GTK_MISC (label), &xpad, &ypad); bounds.x = bounds.y = 0; bounds.width = allocation.width - xpad * 2; bounds.height = allocation.height - ypad * 2; pango_layout_set_width (priv->layout, -1); pango_layout_get_pixel_extents (priv->layout, NULL, &logical); if (priv->have_transform) { PangoContext *context = gtk_widget_get_pango_context (widget); const PangoMatrix *matrix = pango_context_get_matrix (context); const gdouble dx = matrix->xx; /* cos (M_PI * angle / 180) */ const gdouble dy = matrix->xy; /* sin (M_PI * angle / 180) */ if (fabs (dy) < 0.01) { if (logical.width > bounds.width) pango_layout_set_width (priv->layout, bounds.width * PANGO_SCALE); } else if (fabs (dx) < 0.01) { if (logical.width > bounds.height) pango_layout_set_width (priv->layout, bounds.height * PANGO_SCALE); } else { gdouble x0, y0, x1, y1, length; gboolean vertical; gint cy; x0 = bounds.width / 2; y0 = dx ? x0 * dy / dx : G_MAXDOUBLE; vertical = fabs (y0) > bounds.height / 2; if (vertical) { y0 = bounds.height/2; x0 = dy ? y0 * dx / dy : G_MAXDOUBLE; } length = 2 * sqrt (x0 * x0 + y0 * y0); pango_layout_set_width (priv->layout, rint (length * PANGO_SCALE)); pango_layout_get_pixel_size (priv->layout, NULL, &cy); x1 = +dy * cy/2; y1 = -dx * cy/2; if (vertical) { y0 = bounds.height/2 + y1 - y0; x0 = -y0 * dx/dy; } else { x0 = bounds.width/2 + x1 - x0; y0 = -x0 * dy/dx; } length = length - sqrt (x0 * x0 + y0 * y0) * 2; pango_layout_set_width (priv->layout, rint (length * PANGO_SCALE)); } } else if (logical.width > bounds.width) pango_layout_set_width (priv->layout, bounds.width * PANGO_SCALE); } else if (priv->wrap) { GtkWidgetAuxInfo *aux_info = _gtk_widget_get_aux_info (widget, FALSE); gdouble angle = gtk_label_get_angle (label); gint width; gint aux_width = 0; if ((angle == 90 || angle == 270) && aux_info && aux_info->height > 0) aux_width = aux_info->height; else if (aux_info && aux_info->width > 0) aux_width = aux_info->width; if (aux_width > 0) pango_layout_set_width (priv->layout, aux_width * PANGO_SCALE); else { gint xpad, ypad; gtk_misc_get_padding (GTK_MISC (label), &xpad, &ypad); if (angle == 90 || angle == 270) width = allocation.height - ypad * 2; else width = allocation.width - xpad * 2; pango_layout_set_wrap (priv->layout, priv->wrap_mode); pango_layout_set_width (priv->layout, MAX (width, 1) * PANGO_SCALE); } } else /* !priv->wrap */ pango_layout_set_width (priv->layout, -1); } static void gtk_label_ensure_layout (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; GtkWidget *widget; gboolean rtl; widget = GTK_WIDGET (label); rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL; if (!priv->layout) { PangoAlignment align = PANGO_ALIGN_LEFT; /* Quiet gcc */ gdouble angle = gtk_label_get_angle (label); if (angle != 0.0 && !priv->select_info) { PangoMatrix matrix = PANGO_MATRIX_INIT; /* We rotate the standard singleton PangoContext for the widget, * depending on the fact that it's meant pretty much exclusively * for our use. */ pango_matrix_rotate (&matrix, angle); pango_context_set_matrix (gtk_widget_get_pango_context (widget), &matrix); priv->have_transform = TRUE; } else { if (priv->have_transform) pango_context_set_matrix (gtk_widget_get_pango_context (widget), NULL); priv->have_transform = FALSE; } priv->layout = gtk_widget_create_pango_layout (widget, priv->text); if (priv->effective_attrs) pango_layout_set_attributes (priv->layout, priv->effective_attrs); gtk_label_rescan_links (label); switch (priv->jtype) { case GTK_JUSTIFY_LEFT: align = rtl ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT; break; case GTK_JUSTIFY_RIGHT: align = rtl ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT; break; case GTK_JUSTIFY_CENTER: align = PANGO_ALIGN_CENTER; break; case GTK_JUSTIFY_FILL: align = rtl ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT; pango_layout_set_justify (priv->layout, TRUE); break; default: g_assert_not_reached(); } pango_layout_set_alignment (priv->layout, align); pango_layout_set_ellipsize (priv->layout, priv->ellipsize); pango_layout_set_single_paragraph_mode (priv->layout, priv->single_line_mode); gtk_label_update_layout_width (label); } } static gint get_single_line_height (GtkWidget *widget, PangoLayout *layout) { PangoContext *context; PangoFontMetrics *metrics; gint ascent, descent; context = pango_layout_get_context (layout); metrics = get_font_metrics (context, widget); ascent = pango_font_metrics_get_ascent (metrics); descent = pango_font_metrics_get_descent (metrics); pango_font_metrics_unref (metrics); return ascent + descent; } static GtkSizeRequestMode gtk_label_get_request_mode (GtkWidget *widget) { GtkLabel *label = GTK_LABEL (widget); gdouble angle = gtk_label_get_angle (label); if (label->priv->wrap) return (angle == 90 || angle == 270) ? GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT : GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH; return GTK_SIZE_REQUEST_CONSTANT_SIZE; } static void get_size_for_allocation (GtkLabel *label, GtkOrientation orientation, gint allocation, gint *minimum_size, gint *natural_size) { PangoLayout *layout; GtkWidgetAuxInfo *aux_info = _gtk_widget_get_aux_info (GTK_WIDGET (label), FALSE); gint aux_size; gint text_height; if (aux_info) { if (orientation == GTK_ORIENTATION_HORIZONTAL) aux_size = aux_info->width; else aux_size = aux_info->height; } else aux_size = 0; if (aux_size > 0) layout = gtk_label_get_measuring_layout (label, NULL, aux_size * PANGO_SCALE); else layout = gtk_label_get_measuring_layout (label, NULL, allocation * PANGO_SCALE); pango_layout_get_pixel_size (layout, NULL, &text_height); if (minimum_size) *minimum_size = text_height; if (natural_size) *natural_size = text_height; g_object_unref (layout); } static void gtk_label_get_preferred_layout_size (GtkLabel *label, PangoRectangle *required, PangoRectangle *natural) { GtkLabelPrivate *priv = label->priv; PangoLayout *layout; PangoRectangle rect; gint text_width, ellipsize_chars, guess_width; /* "width-chars" Hard-coded minimum width: * - minimum size should be MAX (width-chars, strlen ("...")); * - natural size should be MAX (width-chars, strlen (priv->text)); * * "max-width-chars" User specified maximum size requisition * - minimum size should be MAX (width-chars, 0) * - natural size should be MIN (max-width-chars, strlen (priv->text)) * */ /* When calculating ->wrap sometimes we need to invent a size; Ideally we should be doing * that stuff here instead of inside gtk_label_ensure_layout() */ layout = gtk_label_get_layout_with_guessed_wrap_width (label); /* Start off with the pixel extents of the rendered layout */ pango_layout_get_extents (layout, NULL, required); required->x = required->y = 0; if (priv->single_line_mode || priv->wrap) required->height = get_single_line_height (GTK_WIDGET (label), layout); *natural = *required; guess_width = required->width; layout = gtk_label_get_measuring_layout (label, layout, -1); /* Fetch the length of the complete unwrapped text */ pango_layout_get_extents (layout, NULL, &rect); text_width = rect.width; /* enforce minimum width for ellipsized labels at ~3 chars */ if (priv->ellipsize) ellipsize_chars = 3; else ellipsize_chars = 0; /* "width-chars" Hard-coded minimum width: * - minimum size should be MAX (width-chars, strlen ("...")); * - natural size should be MAX (width-chars, strlen (priv->text)); * * "max-width-chars" User specified maximum size requisition * - minimum size should be MAX (width-chars, 0) * - natural size should be MIN (max-width-chars, strlen (priv->text)) * * For ellipsizing labels; if max-width-chars is specified: either it is used as * a minimum size or the label text as a minimum size (natural size still overflows). * * For wrapping labels; A reasonable minimum size is useful to naturally layout * interfaces automatically. In this case if no "width-chars" is specified, the minimum * width will default to the wrap guess that gtk_label_ensure_layout() does. * * In *any* case the minimum width is completely overridden if an explicit width * request was provided. */ if (priv->ellipsize || priv->wrap) { PangoContext *context; PangoFontMetrics *metrics; gint char_width, digit_width, char_pixels; context = pango_layout_get_context (layout); metrics = get_font_metrics (context, GTK_WIDGET (label)); char_width = pango_font_metrics_get_approximate_char_width (metrics); digit_width = pango_font_metrics_get_approximate_digit_width (metrics); char_pixels = MAX (char_width, digit_width); pango_font_metrics_unref (metrics); required->width = char_pixels * MAX (priv->width_chars, ellipsize_chars); /* Default to the minimum width regularly guessed by GTK+ if no minimum * width was specified, only allow unwrapping of these labels. * * Note that when specifying a small width_chars for a long text; * an accordingly large size will be required for the label height. */ if (priv->wrap && priv->width_chars <= 0) required->width = guess_width; if (priv->max_width_chars < 0) { natural->width = MAX (required->width, text_width); } else { gint max_char_width = char_pixels * priv->max_width_chars; gint max_width = MIN (text_width, max_char_width); /* With max-char-width specified, we let the minimum widths of * ellipsized text crawl up to the max-char-width * (note that we dont want to limit the minimum width for wrapping text). */ if (priv->ellipsize) required->width = MIN (text_width, max_width); natural->width = MAX (required->width, max_width); } } else { required->width = text_width; natural->width = required->width; } /* if a width-request is set, use that as the requested label width */ if (priv->wrap || priv->ellipsize || priv->width_chars > 0 || priv->max_width_chars > 0) { GtkWidgetAuxInfo *aux_info; aux_info = _gtk_widget_get_aux_info (GTK_WIDGET (label), FALSE); if (aux_info && aux_info->width > 0) { required->width = aux_info->width * PANGO_SCALE; natural->width = MAX (natural->width, required->width); } } g_object_unref (layout); } static void gtk_label_get_preferred_size (GtkWidget *widget, GtkOrientation orientation, gint *minimum_size, gint *natural_size) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; PangoRectangle required_rect; PangoRectangle natural_rect; gint xpad, ypad; gtk_label_get_preferred_layout_size (label, &required_rect, &natural_rect); /* Now that we have minimum and natural sizes in pango extents, apply a possible transform */ if (priv->have_transform) { PangoLayout *copy; PangoContext *context; const PangoMatrix *matrix; copy = pango_layout_copy (priv->layout); context = pango_layout_get_context (copy); matrix = pango_context_get_matrix (context); pango_layout_set_width (copy, -1); pango_layout_set_ellipsize (copy, PANGO_ELLIPSIZE_NONE); pango_layout_get_extents (copy, NULL, &natural_rect); g_object_unref (copy); pango_matrix_transform_rectangle (matrix, &required_rect); pango_matrix_transform_rectangle (matrix, &natural_rect); /* Bump the natural size in case of ellipsize to ensure pango has * enough space in the angles (note, we could alternatively set the * layout to not ellipsize when we know we have been allocated our * full natural size, or it may be that pango needs a fix here). */ if (priv->ellipsize && priv->angle != 0 && priv->angle != 90 && priv->angle != 180 && priv->angle != 270 && priv->angle != 360) { /* For some reason we only need this at about 110 degrees, and only * when gaining in height */ natural_rect.height += ROTATION_ELLIPSIZE_PADDING * 2 * PANGO_SCALE; natural_rect.width += ROTATION_ELLIPSIZE_PADDING * 2 * PANGO_SCALE; } } required_rect.width = PANGO_PIXELS_CEIL (required_rect.width); required_rect.height = PANGO_PIXELS_CEIL (required_rect.height); natural_rect.width = PANGO_PIXELS_CEIL (natural_rect.width); natural_rect.height = PANGO_PIXELS_CEIL (natural_rect.height); gtk_misc_get_padding (GTK_MISC (label), &xpad, &ypad); if (orientation == GTK_ORIENTATION_HORIZONTAL) { /* Note, we cant use get_size_for_allocation() when rotating * ellipsized labels. */ if (!(priv->ellipsize && priv->have_transform) && (priv->angle == 90 || priv->angle == 270)) { /* Doing a h4w request on a rotated label here, return the * required width for the minimum height. */ get_size_for_allocation (label, GTK_ORIENTATION_VERTICAL, required_rect.height, minimum_size, natural_size); } else { /* Normal desired width */ *minimum_size = required_rect.width; *natural_size = natural_rect.width; } *minimum_size += xpad * 2; *natural_size += xpad * 2; } else /* GTK_ORIENTATION_VERTICAL */ { /* Note, we cant use get_size_for_allocation() when rotating * ellipsized labels. */ if (!(priv->ellipsize && priv->have_transform) && (priv->angle == 0 || priv->angle == 180 || priv->angle == 360)) { /* Doing a w4h request on a label here, return the required * height for the minimum width. */ get_size_for_allocation (label, GTK_ORIENTATION_HORIZONTAL, required_rect.width, minimum_size, natural_size); } else { /* A vertically rotated label does w4h, so return the base * desired height (text length) */ *minimum_size = required_rect.height; *natural_size = natural_rect.height; } *minimum_size += ypad * 2; *natural_size += ypad * 2; } } static void gtk_label_get_preferred_width (GtkWidget *widget, gint *minimum_size, gint *natural_size) { gtk_label_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum_size, natural_size); } static void gtk_label_get_preferred_height (GtkWidget *widget, gint *minimum_size, gint *natural_size) { gtk_label_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum_size, natural_size); } static void gtk_label_get_preferred_width_for_height (GtkWidget *widget, gint height, gint *minimum_width, gint *natural_width) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; if (priv->wrap && (priv->angle == 90 || priv->angle == 270)) { gint xpad, ypad; gtk_misc_get_padding (GTK_MISC (label), &xpad, &ypad); if (priv->wrap) gtk_label_clear_layout (label); get_size_for_allocation (label, GTK_ORIENTATION_VERTICAL, MAX (1, height - (ypad * 2)), minimum_width, natural_width); if (minimum_width) *minimum_width += xpad * 2; if (natural_width) *natural_width += xpad * 2; } else GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width); } static void gtk_label_get_preferred_height_for_width (GtkWidget *widget, gint width, gint *minimum_height, gint *natural_height) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; if (priv->wrap && (priv->angle == 0 || priv->angle == 180 || priv->angle == 360)) { gint xpad, ypad; gtk_misc_get_padding (GTK_MISC (label), &xpad, &ypad); if (priv->wrap) gtk_label_clear_layout (label); get_size_for_allocation (label, GTK_ORIENTATION_HORIZONTAL, MAX (1, width - xpad * 2), minimum_height, natural_height); if (minimum_height) *minimum_height += ypad * 2; if (natural_height) *natural_height += ypad * 2; } else GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, minimum_height, natural_height); } static void gtk_label_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GTK_WIDGET_CLASS (gtk_label_parent_class)->size_allocate (widget, allocation); if (priv->layout) gtk_label_update_layout_width (label); if (priv->select_info && priv->select_info->window) { gdk_window_move_resize (priv->select_info->window, allocation->x, allocation->y, allocation->width, allocation->height); } } static void gtk_label_update_cursor (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; GtkWidget *widget; if (!priv->select_info) return; widget = GTK_WIDGET (label); if (gtk_widget_get_realized (widget)) { GdkDisplay *display; GdkCursor *cursor; if (gtk_widget_is_sensitive (widget)) { display = gtk_widget_get_display (widget); if (priv->select_info->active_link) cursor = gdk_cursor_new_for_display (display, GDK_HAND2); else if (priv->select_info->selectable) cursor = gdk_cursor_new_for_display (display, GDK_XTERM); else cursor = NULL; } else cursor = NULL; gdk_window_set_cursor (priv->select_info->window, cursor); if (cursor) g_object_unref (cursor); } } static void gtk_label_state_changed (GtkWidget *widget, GtkStateType prev_state) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; if (priv->select_info) { if (!gtk_widget_is_sensitive (widget)) gtk_label_select_region (label, 0, 0); gtk_label_update_cursor (label); } if (GTK_WIDGET_CLASS (gtk_label_parent_class)->state_changed) GTK_WIDGET_CLASS (gtk_label_parent_class)->state_changed (widget, prev_state); } static void gtk_label_style_updated (GtkWidget *widget) { GtkLabel *label = GTK_LABEL (widget); GTK_WIDGET_CLASS (gtk_label_parent_class)->style_updated (widget); /* We have to clear the layout, fonts etc. may have changed */ gtk_label_clear_layout (label); gtk_label_invalidate_wrap_width (label); } static void gtk_label_direction_changed (GtkWidget *widget, GtkTextDirection previous_dir) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; if (priv->layout) pango_layout_context_changed (priv->layout); GTK_WIDGET_CLASS (gtk_label_parent_class)->direction_changed (widget, previous_dir); } static void get_layout_location (GtkLabel *label, gint *xp, gint *yp) { GtkAllocation allocation; GtkMisc *misc; GtkWidget *widget; GtkLabelPrivate *priv; gint req_width, x, y; gint req_height; gint xpad, ypad; gfloat xalign, yalign; PangoRectangle logical; misc = GTK_MISC (label); widget = GTK_WIDGET (label); priv = label->priv; gtk_misc_get_alignment (misc, &xalign, &yalign); gtk_misc_get_padding (misc, &xpad, &ypad); if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR) xalign = 1.0 - xalign; pango_layout_get_extents (priv->layout, NULL, &logical); if (priv->have_transform) { PangoContext *context = gtk_widget_get_pango_context (widget); const PangoMatrix *matrix = pango_context_get_matrix (context); pango_matrix_transform_rectangle (matrix, &logical); } pango_extents_to_pixels (&logical, NULL); req_width = logical.width; req_height = logical.height; req_width += 2 * xpad; req_height += 2 * ypad; gtk_widget_get_allocation (widget, &allocation); x = floor (allocation.x + xpad + xalign * (allocation.width - req_width)); if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR) x = MAX (x, allocation.x + xpad); else x = MIN (x, allocation.x + allocation.width - xpad); /* bgo#315462 - For single-line labels, *do* align the requisition with * respect to the allocation, even if we are under-allocated. For multi-line * labels, always show the top of the text when they are under-allocated. The * rationale is this: * * - Single-line labels appear in GtkButtons, and it is very easy to get them * to be smaller than their requisition. The button may clip the label, but * the label will still be able to show most of itself and the focus * rectangle. Also, it is fairly easy to read a single line of clipped text. * * - Multi-line labels should not be clipped to showing "something in the * middle". You want to read the first line, at least, to get some context. */ if (pango_layout_get_line_count (priv->layout) == 1) y = floor (allocation.y + ypad + (allocation.height - req_height) * yalign); else y = floor (allocation.y + ypad + MAX ((allocation.height - req_height) * yalign, 0)); if (xp) *xp = x; if (yp) *yp = y; } static void draw_insertion_cursor (GtkLabel *label, cairo_t *cr, GdkRectangle *cursor_location, gboolean is_primary, PangoDirection direction, gboolean draw_arrow) { GtkWidget *widget = GTK_WIDGET (label); GtkTextDirection text_dir; if (direction == PANGO_DIRECTION_LTR) text_dir = GTK_TEXT_DIR_LTR; else text_dir = GTK_TEXT_DIR_RTL; gtk_draw_insertion_cursor (widget, cr, cursor_location, is_primary, text_dir, draw_arrow); } static PangoDirection get_cursor_direction (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; GSList *l; g_assert (priv->select_info); gtk_label_ensure_layout (label); for (l = pango_layout_get_lines_readonly (priv->layout); l; l = l->next) { PangoLayoutLine *line = l->data; /* If priv->select_info->selection_end is at the very end of * the line, we don't know if the cursor is on this line or * the next without looking ahead at the next line. (End * of paragraph is different from line break.) But it's * definitely in this paragraph, which is good enough * to figure out the resolved direction. */ if (line->start_index + line->length >= priv->select_info->selection_end) return line->resolved_dir; } return PANGO_DIRECTION_LTR; } static void gtk_label_draw_cursor (GtkLabel *label, cairo_t *cr, gint xoffset, gint yoffset) { GtkLabelPrivate *priv = label->priv; GtkWidget *widget; if (priv->select_info == NULL) return; widget = GTK_WIDGET (label); if (gtk_widget_is_drawable (widget)) { PangoDirection keymap_direction; PangoDirection cursor_direction; PangoRectangle strong_pos, weak_pos; gboolean split_cursor; PangoRectangle *cursor1 = NULL; PangoRectangle *cursor2 = NULL; GdkRectangle cursor_location; PangoDirection dir1 = PANGO_DIRECTION_NEUTRAL; PangoDirection dir2 = PANGO_DIRECTION_NEUTRAL; keymap_direction = gdk_keymap_get_direction (gdk_keymap_get_for_display (gtk_widget_get_display (widget))); cursor_direction = get_cursor_direction (label); gtk_label_ensure_layout (label); pango_layout_get_cursor_pos (priv->layout, priv->select_info->selection_end, &strong_pos, &weak_pos); g_object_get (gtk_widget_get_settings (widget), "gtk-split-cursor", &split_cursor, NULL); dir1 = cursor_direction; if (split_cursor) { cursor1 = &strong_pos; if (strong_pos.x != weak_pos.x || strong_pos.y != weak_pos.y) { dir2 = (cursor_direction == PANGO_DIRECTION_LTR) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR; cursor2 = &weak_pos; } } else { if (keymap_direction == cursor_direction) cursor1 = &strong_pos; else cursor1 = &weak_pos; } cursor_location.x = xoffset + PANGO_PIXELS (cursor1->x); cursor_location.y = yoffset + PANGO_PIXELS (cursor1->y); cursor_location.width = 0; cursor_location.height = PANGO_PIXELS (cursor1->height); draw_insertion_cursor (label, cr, &cursor_location, TRUE, dir1, dir2 != PANGO_DIRECTION_NEUTRAL); if (dir2 != PANGO_DIRECTION_NEUTRAL) { cursor_location.x = xoffset + PANGO_PIXELS (cursor2->x); cursor_location.y = yoffset + PANGO_PIXELS (cursor2->y); cursor_location.width = 0; cursor_location.height = PANGO_PIXELS (cursor2->height); draw_insertion_cursor (label, cr, &cursor_location, FALSE, dir2, TRUE); } } } static GtkLabelLink * gtk_label_get_focus_link (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; GtkLabelSelectionInfo *info = priv->select_info; GList *l; if (!info) return NULL; if (info->selection_anchor != info->selection_end) return NULL; for (l = info->links; l; l = l->next) { GtkLabelLink *link = l->data; if (link->start <= info->selection_anchor && info->selection_anchor <= link->end) return link; } return NULL; } static gint gtk_label_draw (GtkWidget *widget, cairo_t *cr) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GtkLabelSelectionInfo *info = priv->select_info; GtkAllocation allocation; GtkStyleContext *context; GtkStateFlags state; gint x, y; gtk_label_ensure_layout (label); if (priv->text && (*priv->text != '\0')) { GdkRGBA *bg_color, *fg_color; get_layout_location (label, &x, &y); context = gtk_widget_get_style_context (widget); gtk_widget_get_allocation (widget, &allocation); cairo_translate (cr, -allocation.x, -allocation.y); state = gtk_widget_get_state_flags (widget); gtk_style_context_set_state (context, state); gtk_render_layout (context, cr, x, y, priv->layout); if (info && (info->selection_anchor != info->selection_end)) { gint range[2]; cairo_region_t *clip; range[0] = info->selection_anchor; range[1] = info->selection_end; if (range[0] > range[1]) { gint tmp = range[0]; range[0] = range[1]; range[1] = tmp; } clip = gdk_pango_layout_get_clip_region (priv->layout, x, y, range, 1); /* FIXME should use gtk_paint, but it can't use a clip region */ cairo_save (cr); gdk_cairo_region (cr, clip); cairo_clip (cr); state = GTK_STATE_FLAG_SELECTED; if (gtk_widget_has_focus (widget)) state |= GTK_STATE_FLAG_FOCUSED; gtk_style_context_get (context, state, "background-color", &bg_color, "color", &fg_color, NULL); gdk_cairo_set_source_rgba (cr, bg_color); cairo_paint (cr); gdk_cairo_set_source_rgba (cr, fg_color); cairo_move_to (cr, x, y); _gtk_pango_fill_layout (cr, priv->layout); cairo_restore (cr); cairo_region_destroy (clip); gdk_rgba_free (bg_color); gdk_rgba_free (fg_color); } else if (info) { GtkLabelLink *focus_link; GtkLabelLink *active_link; gint range[2]; cairo_region_t *clip; GdkRectangle rect; GdkColor *text_color; GdkColor *link_color; GdkColor *visited_link_color; if (info->selectable && gtk_widget_has_focus (widget)) gtk_label_draw_cursor (label, cr, x, y); focus_link = gtk_label_get_focus_link (label); active_link = info->active_link; if (active_link) { GdkRGBA *bg_color; range[0] = active_link->start; range[1] = active_link->end; cairo_save (cr); clip = gdk_pango_layout_get_clip_region (priv->layout, x, y, range, 1); gdk_cairo_region (cr, clip); cairo_clip (cr); cairo_region_destroy (clip); gtk_label_get_link_colors (widget, &link_color, &visited_link_color); if (active_link->visited) text_color = visited_link_color; else text_color = link_color; if (info->link_clicked) state = GTK_STATE_FLAG_ACTIVE; else state = GTK_STATE_FLAG_PRELIGHT; gtk_style_context_get (context, state, "background-color", &bg_color, NULL); gdk_cairo_set_source_rgba (cr, bg_color); cairo_paint (cr); gdk_cairo_set_source_color (cr, text_color); cairo_move_to (cr, x, y); _gtk_pango_fill_layout (cr, priv->layout); gdk_color_free (link_color); gdk_color_free (visited_link_color); gdk_rgba_free (bg_color); cairo_restore (cr); } if (focus_link && gtk_widget_has_focus (widget)) { range[0] = focus_link->start; range[1] = focus_link->end; clip = gdk_pango_layout_get_clip_region (priv->layout, x, y, range, 1); cairo_region_get_extents (clip, &rect); state = gtk_widget_get_state_flags (widget); gtk_style_context_set_state (context, state); gtk_render_focus (context, cr, rect.x, rect.y, rect.width, rect.height); cairo_region_destroy (clip); } } } return FALSE; } static gboolean separate_uline_pattern (const gchar *str, guint *accel_key, gchar **new_str, gchar **pattern) { gboolean underscore; const gchar *src; gchar *dest; gchar *pattern_dest; *accel_key = GDK_KEY_VoidSymbol; *new_str = g_new (gchar, strlen (str) + 1); *pattern = g_new (gchar, g_utf8_strlen (str, -1) + 1); underscore = FALSE; src = str; dest = *new_str; pattern_dest = *pattern; while (*src) { gunichar c; const gchar *next_src; c = g_utf8_get_char (src); if (c == (gunichar)-1) { g_warning ("Invalid input string"); g_free (*new_str); g_free (*pattern); return FALSE; } next_src = g_utf8_next_char (src); if (underscore) { if (c == '_') *pattern_dest++ = ' '; else { *pattern_dest++ = '_'; if (*accel_key == GDK_KEY_VoidSymbol) *accel_key = gdk_keyval_to_lower (gdk_unicode_to_keyval (c)); } while (src < next_src) *dest++ = *src++; underscore = FALSE; } else { if (c == '_') { underscore = TRUE; src = next_src; } else { while (src < next_src) *dest++ = *src++; *pattern_dest++ = ' '; } } } *dest = 0; *pattern_dest = 0; return TRUE; } static void gtk_label_set_uline_text_internal (GtkLabel *label, const gchar *str) { GtkLabelPrivate *priv = label->priv; guint accel_key = GDK_KEY_VoidSymbol; gchar *new_str; gchar *pattern; g_return_if_fail (GTK_IS_LABEL (label)); g_return_if_fail (str != NULL); /* Split text into the base text and a separate pattern * of underscores. */ if (!separate_uline_pattern (str, &accel_key, &new_str, &pattern)) return; gtk_label_set_text_internal (label, new_str); gtk_label_set_pattern_internal (label, pattern, TRUE); priv->mnemonic_keyval = accel_key; g_free (pattern); } /** * gtk_label_set_text_with_mnemonic: * @label: a #GtkLabel * @str: a string * * Sets the label's text from the string @str. * If characters in @str are preceded by an underscore, they are underlined * indicating that they represent a keyboard accelerator called a mnemonic. * The mnemonic key can be used to activate another widget, chosen * automatically, or explicitly using gtk_label_set_mnemonic_widget(). **/ void gtk_label_set_text_with_mnemonic (GtkLabel *label, const gchar *str) { g_return_if_fail (GTK_IS_LABEL (label)); g_return_if_fail (str != NULL); g_object_freeze_notify (G_OBJECT (label)); gtk_label_set_label_internal (label, g_strdup (str ? str : "")); gtk_label_set_use_markup_internal (label, FALSE); gtk_label_set_use_underline_internal (label, TRUE); gtk_label_recalculate (label); g_object_thaw_notify (G_OBJECT (label)); } static void gtk_label_realize (GtkWidget *widget) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GTK_WIDGET_CLASS (gtk_label_parent_class)->realize (widget); if (priv->select_info) gtk_label_create_window (label); } static void gtk_label_unrealize (GtkWidget *widget) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; if (priv->select_info) gtk_label_destroy_window (label); GTK_WIDGET_CLASS (gtk_label_parent_class)->unrealize (widget); } static void gtk_label_map (GtkWidget *widget) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GTK_WIDGET_CLASS (gtk_label_parent_class)->map (widget); if (priv->select_info) gdk_window_show (priv->select_info->window); } static void gtk_label_unmap (GtkWidget *widget) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; if (priv->select_info) gdk_window_hide (priv->select_info->window); GTK_WIDGET_CLASS (gtk_label_parent_class)->unmap (widget); } static void window_to_layout_coords (GtkLabel *label, gint *x, gint *y) { GtkAllocation allocation; gint lx, ly; GtkWidget *widget; widget = GTK_WIDGET (label); /* get layout location in widget->window coords */ get_layout_location (label, &lx, &ly); gtk_widget_get_allocation (widget, &allocation); if (x) { *x += allocation.x; /* go to widget->window */ *x -= lx; /* go to layout */ } if (y) { *y += allocation.y; /* go to widget->window */ *y -= ly; /* go to layout */ } } #if 0 static void layout_to_window_coords (GtkLabel *label, gint *x, gint *y) { gint lx, ly; GtkWidget *widget; widget = GTK_WIDGET (label); /* get layout location in widget->window coords */ get_layout_location (label, &lx, &ly); if (x) { *x += lx; /* go to widget->window */ *x -= widget->allocation.x; /* go to selection window */ } if (y) { *y += ly; /* go to widget->window */ *y -= widget->allocation.y; /* go to selection window */ } } #endif static gboolean get_layout_index (GtkLabel *label, gint x, gint y, gint *index) { GtkLabelPrivate *priv = label->priv; gint trailing = 0; const gchar *cluster; const gchar *cluster_end; gboolean inside; *index = 0; gtk_label_ensure_layout (label); window_to_layout_coords (label, &x, &y); x *= PANGO_SCALE; y *= PANGO_SCALE; inside = pango_layout_xy_to_index (priv->layout, x, y, index, &trailing); cluster = priv->text + *index; cluster_end = cluster; while (trailing) { cluster_end = g_utf8_next_char (cluster_end); --trailing; } *index += (cluster_end - cluster); return inside; } static void gtk_label_select_word (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; gint min, max; gint start_index = gtk_label_move_backward_word (label, priv->select_info->selection_end); gint end_index = gtk_label_move_forward_word (label, priv->select_info->selection_end); min = MIN (priv->select_info->selection_anchor, priv->select_info->selection_end); max = MAX (priv->select_info->selection_anchor, priv->select_info->selection_end); min = MIN (min, start_index); max = MAX (max, end_index); gtk_label_select_region_index (label, min, max); } static void gtk_label_grab_focus (GtkWidget *widget) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; gboolean select_on_focus; GtkLabelLink *link; if (priv->select_info == NULL) return; GTK_WIDGET_CLASS (gtk_label_parent_class)->grab_focus (widget); if (priv->select_info->selectable) { g_object_get (gtk_widget_get_settings (widget), "gtk-label-select-on-focus", &select_on_focus, NULL); if (select_on_focus && !priv->in_click) gtk_label_select_region (label, 0, -1); } else { if (priv->select_info->links && !priv->in_click) { link = priv->select_info->links->data; priv->select_info->selection_anchor = link->start; priv->select_info->selection_end = link->start; } } } static gboolean gtk_label_focus (GtkWidget *widget, GtkDirectionType direction) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GtkLabelSelectionInfo *info = priv->select_info; GtkLabelLink *focus_link; GList *l; if (!gtk_widget_is_focus (widget)) { gtk_widget_grab_focus (widget); if (info) { focus_link = gtk_label_get_focus_link (label); if (focus_link && direction == GTK_DIR_TAB_BACKWARD) { l = g_list_last (info->links); focus_link = l->data; info->selection_anchor = focus_link->start; info->selection_end = focus_link->start; } } return TRUE; } if (!info) return FALSE; if (info->selectable) { gint index; if (info->selection_anchor != info->selection_end) goto out; index = info->selection_anchor; if (direction == GTK_DIR_TAB_FORWARD) for (l = info->links; l; l = l->next) { GtkLabelLink *link = l->data; if (link->start > index) { gtk_label_select_region_index (label, link->start, link->start); return TRUE; } } else if (direction == GTK_DIR_TAB_BACKWARD) for (l = g_list_last (info->links); l; l = l->prev) { GtkLabelLink *link = l->data; if (link->end < index) { gtk_label_select_region_index (label, link->start, link->start); return TRUE; } } goto out; } else { focus_link = gtk_label_get_focus_link (label); switch (direction) { case GTK_DIR_TAB_FORWARD: if (focus_link) { l = g_list_find (info->links, focus_link); l = l->next; } else l = info->links; break; case GTK_DIR_TAB_BACKWARD: if (focus_link) { l = g_list_find (info->links, focus_link); l = l->prev; } else l = g_list_last (info->links); break; default: goto out; } if (l) { focus_link = l->data; info->selection_anchor = focus_link->start; info->selection_end = focus_link->start; gtk_widget_queue_draw (widget); return TRUE; } } out: return FALSE; } static gboolean gtk_label_button_press (GtkWidget *widget, GdkEventButton *event) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GtkLabelSelectionInfo *info = priv->select_info; gint index = 0; gint min, max; if (info == NULL) return FALSE; if (info->active_link) { if (event->button == 1) { info->link_clicked = 1; gtk_widget_queue_draw (widget); } else if (event->button == 3 && event->type == GDK_BUTTON_PRESS) { info->link_clicked = 1; gtk_label_do_popup (label, event); return TRUE; } } if (!info->selectable) return FALSE; info->in_drag = FALSE; info->select_words = FALSE; if (event->button == 1) { if (!gtk_widget_has_focus (widget)) { priv->in_click = TRUE; gtk_widget_grab_focus (widget); priv->in_click = FALSE; } if (event->type == GDK_3BUTTON_PRESS) { gtk_label_select_region_index (label, 0, strlen (priv->text)); return TRUE; } if (event->type == GDK_2BUTTON_PRESS) { info->select_words = TRUE; gtk_label_select_word (label); return TRUE; } get_layout_index (label, event->x, event->y, &index); min = MIN (info->selection_anchor, info->selection_end); max = MAX (info->selection_anchor, info->selection_end); if ((info->selection_anchor != info->selection_end) && (event->state & GDK_SHIFT_MASK)) { /* extend (same as motion) */ min = MIN (min, index); max = MAX (max, index); /* ensure the anchor is opposite index */ if (index == min) { gint tmp = min; min = max; max = tmp; } gtk_label_select_region_index (label, min, max); } else { if (event->type == GDK_3BUTTON_PRESS) gtk_label_select_region_index (label, 0, strlen (priv->text)); else if (event->type == GDK_2BUTTON_PRESS) gtk_label_select_word (label); else if (min < max && min <= index && index <= max) { info->in_drag = TRUE; info->drag_start_x = event->x; info->drag_start_y = event->y; } else /* start a replacement */ gtk_label_select_region_index (label, index, index); } return TRUE; } else if (event->button == 3 && event->type == GDK_BUTTON_PRESS) { gtk_label_do_popup (label, event); return TRUE; } return FALSE; } static gboolean gtk_label_button_release (GtkWidget *widget, GdkEventButton *event) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GtkLabelSelectionInfo *info = priv->select_info; gint index; if (info == NULL) return FALSE; if (info->in_drag) { info->in_drag = 0; get_layout_index (label, event->x, event->y, &index); gtk_label_select_region_index (label, index, index); return FALSE; } if (event->button != 1) return FALSE; if (info->active_link && info->selection_anchor == info->selection_end && info->link_clicked) { emit_activate_link (label, info->active_link); info->link_clicked = 0; return TRUE; } /* The goal here is to return TRUE iff we ate the * button press to start selecting. */ return TRUE; } static void connect_mnemonics_visible_notify (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; GtkWidget *toplevel; gboolean connected; toplevel = gtk_widget_get_toplevel (GTK_WIDGET (label)); if (!GTK_IS_WINDOW (toplevel)) return; /* always set up this widgets initial value */ priv->mnemonics_visible = gtk_window_get_mnemonics_visible (GTK_WINDOW (toplevel)); connected = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (toplevel), "gtk-label-mnemonics-visible-connected")); if (!connected) { g_signal_connect (toplevel, "notify::mnemonics-visible", G_CALLBACK (label_mnemonics_visible_changed), label); g_object_set_data (G_OBJECT (toplevel), "gtk-label-mnemonics-visible-connected", GINT_TO_POINTER (1)); } } static void drag_begin_cb (GtkWidget *widget, GdkDragContext *context, gpointer data) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; cairo_surface_t *surface = NULL; g_signal_handlers_disconnect_by_func (widget, drag_begin_cb, NULL); if ((priv->select_info->selection_anchor != priv->select_info->selection_end) && priv->text) { gint start, end; gint len; start = MIN (priv->select_info->selection_anchor, priv->select_info->selection_end); end = MAX (priv->select_info->selection_anchor, priv->select_info->selection_end); len = strlen (priv->text); if (end > len) end = len; if (start > len) start = len; surface = _gtk_text_util_create_drag_icon (widget, priv->text + start, end - start); } if (surface) { gtk_drag_set_icon_surface (context, surface); cairo_surface_destroy (surface); } else { gtk_drag_set_icon_default (context); } } static gboolean gtk_label_motion (GtkWidget *widget, GdkEventMotion *event) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GtkLabelSelectionInfo *info = priv->select_info; gint index; if (info == NULL) return FALSE; if (info->links && !info->in_drag) { GList *l; GtkLabelLink *link; gboolean found = FALSE; if (info->selection_anchor == info->selection_end) { if (get_layout_index (label, event->x, event->y, &index)) { for (l = info->links; l != NULL; l = l->next) { link = l->data; if (index >= link->start && index <= link->end) { found = TRUE; break; } } } } if (found) { if (info->active_link != link) { info->link_clicked = 0; info->active_link = link; gtk_label_update_cursor (label); gtk_widget_queue_draw (widget); } } else { if (info->active_link != NULL) { info->link_clicked = 0; info->active_link = NULL; gtk_label_update_cursor (label); gtk_widget_queue_draw (widget); } } } if (!info->selectable) return FALSE; if ((event->state & GDK_BUTTON1_MASK) == 0) return FALSE; if (info->in_drag) { if (gtk_drag_check_threshold (widget, info->drag_start_x, info->drag_start_y, event->x, event->y)) { GtkTargetList *target_list = gtk_target_list_new (NULL, 0); gtk_target_list_add_text_targets (target_list, 0); g_signal_connect (widget, "drag-begin", G_CALLBACK (drag_begin_cb), NULL); gtk_drag_begin (widget, target_list, GDK_ACTION_COPY, 1, (GdkEvent *)event); info->in_drag = FALSE; gtk_target_list_unref (target_list); } } else { gint x, y; gdk_window_get_device_position (info->window, event->device, &x, &y, NULL); get_layout_index (label, x, y, &index); if (info->select_words) { gint min, max; gint old_min, old_max; gint anchor, end; min = gtk_label_move_backward_word (label, index); max = gtk_label_move_forward_word (label, index); anchor = info->selection_anchor; end = info->selection_end; old_min = MIN (anchor, end); old_max = MAX (anchor, end); if (min < old_min) { anchor = min; end = old_max; } else if (old_max < max) { anchor = max; end = old_min; } else if (anchor == old_min) { if (anchor != min) anchor = max; } else { if (anchor != max) anchor = min; } gtk_label_select_region_index (label, anchor, end); } else gtk_label_select_region_index (label, info->selection_anchor, index); } return TRUE; } static gboolean gtk_label_leave_notify (GtkWidget *widget, GdkEventCrossing *event) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; if (priv->select_info) { priv->select_info->active_link = NULL; gtk_label_update_cursor (label); gtk_widget_queue_draw (widget); } if (GTK_WIDGET_CLASS (gtk_label_parent_class)->leave_notify_event) return GTK_WIDGET_CLASS (gtk_label_parent_class)->leave_notify_event (widget, event); return FALSE; } static void gtk_label_create_window (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; GtkAllocation allocation; GtkWidget *widget; GdkWindowAttr attributes; gint attributes_mask; g_assert (priv->select_info); widget = GTK_WIDGET (label); g_assert (gtk_widget_get_realized (widget)); if (priv->select_info->window) return; gtk_widget_get_allocation (widget, &allocation); attributes.x = allocation.x; attributes.y = allocation.y; attributes.width = allocation.width; attributes.height = allocation.height; attributes.window_type = GDK_WINDOW_CHILD; attributes.wclass = GDK_INPUT_ONLY; attributes.override_redirect = TRUE; attributes.event_mask = gtk_widget_get_events (widget) | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_BUTTON_MOTION_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK; attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR; if (gtk_widget_is_sensitive (widget)) { attributes.cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget), GDK_XTERM); attributes_mask |= GDK_WA_CURSOR; } priv->select_info->window = gdk_window_new (gtk_widget_get_window (widget), &attributes, attributes_mask); gdk_window_set_user_data (priv->select_info->window, widget); if (attributes_mask & GDK_WA_CURSOR) g_object_unref (attributes.cursor); } static void gtk_label_destroy_window (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; g_assert (priv->select_info); if (priv->select_info->window == NULL) return; gdk_window_set_user_data (priv->select_info->window, NULL); gdk_window_destroy (priv->select_info->window); priv->select_info->window = NULL; } static void gtk_label_ensure_select_info (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; if (priv->select_info == NULL) { priv->select_info = g_new0 (GtkLabelSelectionInfo, 1); gtk_widget_set_can_focus (GTK_WIDGET (label), TRUE); if (gtk_widget_get_realized (GTK_WIDGET (label))) gtk_label_create_window (label); if (gtk_widget_get_mapped (GTK_WIDGET (label))) gdk_window_show (priv->select_info->window); } } static void gtk_label_clear_select_info (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; if (priv->select_info == NULL) return; if (!priv->select_info->selectable && !priv->select_info->links) { gtk_label_destroy_window (label); g_free (priv->select_info); priv->select_info = NULL; gtk_widget_set_can_focus (GTK_WIDGET (label), FALSE); } } /** * gtk_label_set_selectable: * @label: a #GtkLabel * @setting: %TRUE to allow selecting text in the label * * Selectable labels allow the user to select text from the label, for * copy-and-paste. **/ void gtk_label_set_selectable (GtkLabel *label, gboolean setting) { GtkLabelPrivate *priv; gboolean old_setting; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; setting = setting != FALSE; old_setting = priv->select_info && priv->select_info->selectable; if (setting) { gtk_label_ensure_select_info (label); priv->select_info->selectable = TRUE; gtk_label_update_cursor (label); } else { if (old_setting) { /* unselect, to give up the selection */ gtk_label_select_region (label, 0, 0); priv->select_info->selectable = FALSE; gtk_label_clear_select_info (label); gtk_label_update_cursor (label); } } if (setting != old_setting) { g_object_freeze_notify (G_OBJECT (label)); g_object_notify (G_OBJECT (label), "selectable"); g_object_notify (G_OBJECT (label), "cursor-position"); g_object_notify (G_OBJECT (label), "selection-bound"); g_object_thaw_notify (G_OBJECT (label)); gtk_widget_queue_draw (GTK_WIDGET (label)); } } /** * gtk_label_get_selectable: * @label: a #GtkLabel * * Gets the value set by gtk_label_set_selectable(). * * Return value: %TRUE if the user can copy text from the label **/ gboolean gtk_label_get_selectable (GtkLabel *label) { GtkLabelPrivate *priv; g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); priv = label->priv; return priv->select_info && priv->select_info->selectable; } /** * gtk_label_set_angle: * @label: a #GtkLabel * @angle: the angle that the baseline of the label makes with * the horizontal, in degrees, measured counterclockwise * * Sets the angle of rotation for the label. An angle of 90 reads from * from bottom to top, an angle of 270, from top to bottom. The angle * setting for the label is ignored if the label is selectable, * wrapped, or ellipsized. * * Since: 2.6 **/ void gtk_label_set_angle (GtkLabel *label, gdouble angle) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; /* Canonicalize to [0,360]. We don't canonicalize 360 to 0, because * double property ranges are inclusive, and changing 360 to 0 would * make a property editor behave strangely. */ if (angle < 0 || angle > 360.0) angle = angle - 360. * floor (angle / 360.); if (priv->angle != angle) { priv->angle = angle; gtk_label_clear_layout (label); gtk_widget_queue_resize (GTK_WIDGET (label)); g_object_notify (G_OBJECT (label), "angle"); } } /** * gtk_label_get_angle: * @label: a #GtkLabel * * Gets the angle of rotation for the label. See * gtk_label_set_angle(). * * Return value: the angle of rotation for the label * * Since: 2.6 **/ gdouble gtk_label_get_angle (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), 0.0); return label->priv->angle; } static void gtk_label_set_selection_text (GtkLabel *label, GtkSelectionData *selection_data) { GtkLabelPrivate *priv = label->priv; if ((priv->select_info->selection_anchor != priv->select_info->selection_end) && priv->text) { gint start, end; gint len; start = MIN (priv->select_info->selection_anchor, priv->select_info->selection_end); end = MAX (priv->select_info->selection_anchor, priv->select_info->selection_end); len = strlen (priv->text); if (end > len) end = len; if (start > len) start = len; gtk_selection_data_set_text (selection_data, priv->text + start, end - start); } } static void gtk_label_drag_data_get (GtkWidget *widget, GdkDragContext *context, GtkSelectionData *selection_data, guint info, guint time) { gtk_label_set_selection_text (GTK_LABEL (widget), selection_data); } static void get_text_callback (GtkClipboard *clipboard, GtkSelectionData *selection_data, guint info, gpointer user_data_or_owner) { gtk_label_set_selection_text (GTK_LABEL (user_data_or_owner), selection_data); } static void clear_text_callback (GtkClipboard *clipboard, gpointer user_data_or_owner) { GtkLabel *label; GtkLabelPrivate *priv; label = GTK_LABEL (user_data_or_owner); priv = label->priv; if (priv->select_info) { priv->select_info->selection_anchor = priv->select_info->selection_end; gtk_widget_queue_draw (GTK_WIDGET (label)); } } static void gtk_label_select_region_index (GtkLabel *label, gint anchor_index, gint end_index) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; if (priv->select_info && priv->select_info->selectable) { GtkClipboard *clipboard; if (priv->select_info->selection_anchor == anchor_index && priv->select_info->selection_end == end_index) return; priv->select_info->selection_anchor = anchor_index; priv->select_info->selection_end = end_index; clipboard = gtk_widget_get_clipboard (GTK_WIDGET (label), GDK_SELECTION_PRIMARY); if (anchor_index != end_index) { GtkTargetList *list; GtkTargetEntry *targets; gint n_targets; list = gtk_target_list_new (NULL, 0); gtk_target_list_add_text_targets (list, 0); targets = gtk_target_table_new_from_list (list, &n_targets); gtk_clipboard_set_with_owner (clipboard, targets, n_targets, get_text_callback, clear_text_callback, G_OBJECT (label)); gtk_target_table_free (targets, n_targets); gtk_target_list_unref (list); } else { if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (label)) gtk_clipboard_clear (clipboard); } gtk_widget_queue_draw (GTK_WIDGET (label)); g_object_freeze_notify (G_OBJECT (label)); g_object_notify (G_OBJECT (label), "cursor-position"); g_object_notify (G_OBJECT (label), "selection-bound"); g_object_thaw_notify (G_OBJECT (label)); } } /** * gtk_label_select_region: * @label: a #GtkLabel * @start_offset: start offset (in characters not bytes) * @end_offset: end offset (in characters not bytes) * * Selects a range of characters in the label, if the label is selectable. * See gtk_label_set_selectable(). If the label is not selectable, * this function has no effect. If @start_offset or * @end_offset are -1, then the end of the label will be substituted. **/ void gtk_label_select_region (GtkLabel *label, gint start_offset, gint end_offset) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; if (priv->text && priv->select_info) { if (start_offset < 0) start_offset = g_utf8_strlen (priv->text, -1); if (end_offset < 0) end_offset = g_utf8_strlen (priv->text, -1); gtk_label_select_region_index (label, g_utf8_offset_to_pointer (priv->text, start_offset) - priv->text, g_utf8_offset_to_pointer (priv->text, end_offset) - priv->text); } } /** * gtk_label_get_selection_bounds: * @label: a #GtkLabel * @start: (out): return location for start of selection, as a character offset * @end: (out): return location for end of selection, as a character offset * * Gets the selected range of characters in the label, returning %TRUE * if there's a selection. * * Return value: %TRUE if selection is non-empty **/ gboolean gtk_label_get_selection_bounds (GtkLabel *label, gint *start, gint *end) { GtkLabelPrivate *priv; g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); priv = label->priv; if (priv->select_info == NULL) { /* not a selectable label */ if (start) *start = 0; if (end) *end = 0; return FALSE; } else { gint start_index, end_index; gint start_offset, end_offset; gint len; start_index = MIN (priv->select_info->selection_anchor, priv->select_info->selection_end); end_index = MAX (priv->select_info->selection_anchor, priv->select_info->selection_end); len = strlen (priv->text); if (end_index > len) end_index = len; if (start_index > len) start_index = len; start_offset = g_utf8_strlen (priv->text, start_index); end_offset = g_utf8_strlen (priv->text, end_index); if (start_offset > end_offset) { gint tmp = start_offset; start_offset = end_offset; end_offset = tmp; } if (start) *start = start_offset; if (end) *end = end_offset; return start_offset != end_offset; } } /** * gtk_label_get_layout: * @label: a #GtkLabel * * Gets the #PangoLayout used to display the label. * The layout is useful to e.g. convert text positions to * pixel positions, in combination with gtk_label_get_layout_offsets(). * The returned layout is owned by the @label so need not be * freed by the caller. The @label is free to recreate its layout at * any time, so it should be considered read-only. * * Return value: (transfer none): the #PangoLayout for this label **/ PangoLayout* gtk_label_get_layout (GtkLabel *label) { GtkLabelPrivate *priv; g_return_val_if_fail (GTK_IS_LABEL (label), NULL); priv = label->priv; gtk_label_ensure_layout (label); return priv->layout; } /** * gtk_label_get_layout_offsets: * @label: a #GtkLabel * @x: (out) (allow-none): location to store X offset of layout, or %NULL * @y: (out) (allow-none): location to store Y offset of layout, or %NULL * * Obtains the coordinates where the label will draw the #PangoLayout * representing the text in the label; useful to convert mouse events * into coordinates inside the #PangoLayout, e.g. to take some action * if some part of the label is clicked. Of course you will need to * create a #GtkEventBox to receive the events, and pack the label * inside it, since labels are a #GTK_NO_WINDOW widget. Remember * when using the #PangoLayout functions you need to convert to * and from pixels using PANGO_PIXELS() or #PANGO_SCALE. **/ void gtk_label_get_layout_offsets (GtkLabel *label, gint *x, gint *y) { g_return_if_fail (GTK_IS_LABEL (label)); gtk_label_ensure_layout (label); get_layout_location (label, x, y); } /** * gtk_label_set_use_markup: * @label: a #GtkLabel * @setting: %TRUE if the label's text should be parsed for markup. * * Sets whether the text of the label contains markup in Pango's text markup * language. See gtk_label_set_markup(). **/ void gtk_label_set_use_markup (GtkLabel *label, gboolean setting) { g_return_if_fail (GTK_IS_LABEL (label)); gtk_label_set_use_markup_internal (label, setting); gtk_label_recalculate (label); } /** * gtk_label_get_use_markup: * @label: a #GtkLabel * * Returns whether the label's text is interpreted as marked up with * the Pango text markup * language. See gtk_label_set_use_markup (). * * Return value: %TRUE if the label's text will be parsed for markup. **/ gboolean gtk_label_get_use_markup (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); return label->priv->use_markup; } /** * gtk_label_set_use_underline: * @label: a #GtkLabel * @setting: %TRUE if underlines in the text indicate mnemonics * * If true, an underline in the text indicates the next character should be * used for the mnemonic accelerator key. */ void gtk_label_set_use_underline (GtkLabel *label, gboolean setting) { g_return_if_fail (GTK_IS_LABEL (label)); gtk_label_set_use_underline_internal (label, setting); gtk_label_recalculate (label); } /** * gtk_label_get_use_underline: * @label: a #GtkLabel * * Returns whether an embedded underline in the label indicates a * mnemonic. See gtk_label_set_use_underline(). * * Return value: %TRUE whether an embedded underline in the label indicates * the mnemonic accelerator keys. **/ gboolean gtk_label_get_use_underline (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); return label->priv->use_underline; } /** * gtk_label_set_single_line_mode: * @label: a #GtkLabel * @single_line_mode: %TRUE if the label should be in single line mode * * Sets whether the label is in single line mode. * * Since: 2.6 */ void gtk_label_set_single_line_mode (GtkLabel *label, gboolean single_line_mode) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; single_line_mode = single_line_mode != FALSE; if (priv->single_line_mode != single_line_mode) { priv->single_line_mode = single_line_mode; gtk_label_clear_layout (label); gtk_widget_queue_resize (GTK_WIDGET (label)); g_object_notify (G_OBJECT (label), "single-line-mode"); } } /** * gtk_label_get_single_line_mode: * @label: a #GtkLabel * * Returns whether the label is in single line mode. * * Return value: %TRUE when the label is in single line mode. * * Since: 2.6 **/ gboolean gtk_label_get_single_line_mode (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); return label->priv->single_line_mode; } /* Compute the X position for an offset that corresponds to the "more important * cursor position for that offset. We use this when trying to guess to which * end of the selection we should go to when the user hits the left or * right arrow key. */ static void get_better_cursor (GtkLabel *label, gint index, gint *x, gint *y) { GtkLabelPrivate *priv = label->priv; GdkKeymap *keymap = gdk_keymap_get_for_display (gtk_widget_get_display (GTK_WIDGET (label))); PangoDirection keymap_direction = gdk_keymap_get_direction (keymap); PangoDirection cursor_direction = get_cursor_direction (label); gboolean split_cursor; PangoRectangle strong_pos, weak_pos; g_object_get (gtk_widget_get_settings (GTK_WIDGET (label)), "gtk-split-cursor", &split_cursor, NULL); gtk_label_ensure_layout (label); pango_layout_get_cursor_pos (priv->layout, index, &strong_pos, &weak_pos); if (split_cursor) { *x = strong_pos.x / PANGO_SCALE; *y = strong_pos.y / PANGO_SCALE; } else { if (keymap_direction == cursor_direction) { *x = strong_pos.x / PANGO_SCALE; *y = strong_pos.y / PANGO_SCALE; } else { *x = weak_pos.x / PANGO_SCALE; *y = weak_pos.y / PANGO_SCALE; } } } static gint gtk_label_move_logically (GtkLabel *label, gint start, gint count) { GtkLabelPrivate *priv = label->priv; gint offset = g_utf8_pointer_to_offset (priv->text, priv->text + start); if (priv->text) { PangoLogAttr *log_attrs; gint n_attrs; gint length; gtk_label_ensure_layout (label); length = g_utf8_strlen (priv->text, -1); pango_layout_get_log_attrs (priv->layout, &log_attrs, &n_attrs); while (count > 0 && offset < length) { do offset++; while (offset < length && !log_attrs[offset].is_cursor_position); count--; } while (count < 0 && offset > 0) { do offset--; while (offset > 0 && !log_attrs[offset].is_cursor_position); count++; } g_free (log_attrs); } return g_utf8_offset_to_pointer (priv->text, offset) - priv->text; } static gint gtk_label_move_visually (GtkLabel *label, gint start, gint count) { GtkLabelPrivate *priv = label->priv; gint index; index = start; while (count != 0) { int new_index, new_trailing; gboolean split_cursor; gboolean strong; gtk_label_ensure_layout (label); g_object_get (gtk_widget_get_settings (GTK_WIDGET (label)), "gtk-split-cursor", &split_cursor, NULL); if (split_cursor) strong = TRUE; else { GdkKeymap *keymap = gdk_keymap_get_for_display (gtk_widget_get_display (GTK_WIDGET (label))); PangoDirection keymap_direction = gdk_keymap_get_direction (keymap); strong = keymap_direction == get_cursor_direction (label); } if (count > 0) { pango_layout_move_cursor_visually (priv->layout, strong, index, 0, 1, &new_index, &new_trailing); count--; } else { pango_layout_move_cursor_visually (priv->layout, strong, index, 0, -1, &new_index, &new_trailing); count++; } if (new_index < 0 || new_index == G_MAXINT) break; index = new_index; while (new_trailing--) index = g_utf8_next_char (priv->text + new_index) - priv->text; } return index; } static gint gtk_label_move_forward_word (GtkLabel *label, gint start) { GtkLabelPrivate *priv = label->priv; gint new_pos = g_utf8_pointer_to_offset (priv->text, priv->text + start); gint length; length = g_utf8_strlen (priv->text, -1); if (new_pos < length) { PangoLogAttr *log_attrs; gint n_attrs; gtk_label_ensure_layout (label); pango_layout_get_log_attrs (priv->layout, &log_attrs, &n_attrs); /* Find the next word end */ new_pos++; while (new_pos < n_attrs && !log_attrs[new_pos].is_word_end) new_pos++; g_free (log_attrs); } return g_utf8_offset_to_pointer (priv->text, new_pos) - priv->text; } static gint gtk_label_move_backward_word (GtkLabel *label, gint start) { GtkLabelPrivate *priv = label->priv; gint new_pos = g_utf8_pointer_to_offset (priv->text, priv->text + start); if (new_pos > 0) { PangoLogAttr *log_attrs; gint n_attrs; gtk_label_ensure_layout (label); pango_layout_get_log_attrs (priv->layout, &log_attrs, &n_attrs); new_pos -= 1; /* Find the previous word beginning */ while (new_pos > 0 && !log_attrs[new_pos].is_word_start) new_pos--; g_free (log_attrs); } return g_utf8_offset_to_pointer (priv->text, new_pos) - priv->text; } static void gtk_label_move_cursor (GtkLabel *label, GtkMovementStep step, gint count, gboolean extend_selection) { GtkLabelPrivate *priv = label->priv; gint old_pos; gint new_pos; if (priv->select_info == NULL) return; old_pos = new_pos = priv->select_info->selection_end; if (priv->select_info->selection_end != priv->select_info->selection_anchor && !extend_selection) { /* If we have a current selection and aren't extending it, move to the * start/or end of the selection as appropriate */ switch (step) { case GTK_MOVEMENT_VISUAL_POSITIONS: { gint end_x, end_y; gint anchor_x, anchor_y; gboolean end_is_left; get_better_cursor (label, priv->select_info->selection_end, &end_x, &end_y); get_better_cursor (label, priv->select_info->selection_anchor, &anchor_x, &anchor_y); end_is_left = (end_y < anchor_y) || (end_y == anchor_y && end_x < anchor_x); if (count < 0) new_pos = end_is_left ? priv->select_info->selection_end : priv->select_info->selection_anchor; else new_pos = !end_is_left ? priv->select_info->selection_end : priv->select_info->selection_anchor; break; } case GTK_MOVEMENT_LOGICAL_POSITIONS: case GTK_MOVEMENT_WORDS: if (count < 0) new_pos = MIN (priv->select_info->selection_end, priv->select_info->selection_anchor); else new_pos = MAX (priv->select_info->selection_end, priv->select_info->selection_anchor); break; case GTK_MOVEMENT_DISPLAY_LINE_ENDS: case GTK_MOVEMENT_PARAGRAPH_ENDS: case GTK_MOVEMENT_BUFFER_ENDS: /* FIXME: Can do better here */ new_pos = count < 0 ? 0 : strlen (priv->text); break; case GTK_MOVEMENT_DISPLAY_LINES: case GTK_MOVEMENT_PARAGRAPHS: case GTK_MOVEMENT_PAGES: case GTK_MOVEMENT_HORIZONTAL_PAGES: break; } } else { switch (step) { case GTK_MOVEMENT_LOGICAL_POSITIONS: new_pos = gtk_label_move_logically (label, new_pos, count); break; case GTK_MOVEMENT_VISUAL_POSITIONS: new_pos = gtk_label_move_visually (label, new_pos, count); if (new_pos == old_pos) { if (!extend_selection) { if (!gtk_widget_keynav_failed (GTK_WIDGET (label), count > 0 ? GTK_DIR_RIGHT : GTK_DIR_LEFT)) { GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (label)); if (toplevel) gtk_widget_child_focus (toplevel, count > 0 ? GTK_DIR_RIGHT : GTK_DIR_LEFT); } } else { gtk_widget_error_bell (GTK_WIDGET (label)); } } break; case GTK_MOVEMENT_WORDS: while (count > 0) { new_pos = gtk_label_move_forward_word (label, new_pos); count--; } while (count < 0) { new_pos = gtk_label_move_backward_word (label, new_pos); count++; } if (new_pos == old_pos) gtk_widget_error_bell (GTK_WIDGET (label)); break; case GTK_MOVEMENT_DISPLAY_LINE_ENDS: case GTK_MOVEMENT_PARAGRAPH_ENDS: case GTK_MOVEMENT_BUFFER_ENDS: /* FIXME: Can do better here */ new_pos = count < 0 ? 0 : strlen (priv->text); if (new_pos == old_pos) gtk_widget_error_bell (GTK_WIDGET (label)); break; case GTK_MOVEMENT_DISPLAY_LINES: case GTK_MOVEMENT_PARAGRAPHS: case GTK_MOVEMENT_PAGES: case GTK_MOVEMENT_HORIZONTAL_PAGES: break; } } if (extend_selection) gtk_label_select_region_index (label, priv->select_info->selection_anchor, new_pos); else gtk_label_select_region_index (label, new_pos, new_pos); } static void gtk_label_copy_clipboard (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; if (priv->text && priv->select_info) { gint start, end; gint len; GtkClipboard *clipboard; start = MIN (priv->select_info->selection_anchor, priv->select_info->selection_end); end = MAX (priv->select_info->selection_anchor, priv->select_info->selection_end); len = strlen (priv->text); if (end > len) end = len; if (start > len) start = len; clipboard = gtk_widget_get_clipboard (GTK_WIDGET (label), GDK_SELECTION_CLIPBOARD); if (start != end) gtk_clipboard_set_text (clipboard, priv->text + start, end - start); else { GtkLabelLink *link; link = gtk_label_get_focus_link (label); if (link) gtk_clipboard_set_text (clipboard, link->uri, -1); } } } static void gtk_label_select_all (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; gtk_label_select_region_index (label, 0, strlen (priv->text)); } /* Quick hack of a popup menu */ static void activate_cb (GtkWidget *menuitem, GtkLabel *label) { const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal"); g_signal_emit_by_name (label, signal); } static void append_action_signal (GtkLabel *label, GtkWidget *menu, const gchar *stock_id, const gchar *signal, gboolean sensitive) { GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL); g_object_set_data (G_OBJECT (menuitem), I_("gtk-signal"), (char *)signal); g_signal_connect (menuitem, "activate", G_CALLBACK (activate_cb), label); gtk_widget_set_sensitive (menuitem, sensitive); gtk_widget_show (menuitem); gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem); } static void popup_menu_detach (GtkWidget *attach_widget, GtkMenu *menu) { GtkLabel *label = GTK_LABEL (attach_widget); GtkLabelPrivate *priv = label->priv; if (priv->select_info) priv->select_info->popup_menu = NULL; } static void popup_position_func (GtkMenu *menu, gint *x, gint *y, gboolean *push_in, gpointer user_data) { GtkLabel *label; GtkWidget *widget; GtkAllocation allocation; GtkRequisition req; GdkScreen *screen; label = GTK_LABEL (user_data); widget = GTK_WIDGET (label); g_return_if_fail (gtk_widget_get_realized (widget)); screen = gtk_widget_get_screen (widget); gdk_window_get_origin (gtk_widget_get_window (widget), x, y); gtk_widget_get_allocation (widget, &allocation); *x += allocation.x; *y += allocation.y; gtk_widget_get_preferred_size (GTK_WIDGET (menu), &req, NULL); gtk_widget_get_allocation (widget, &allocation); *x += allocation.width / 2; *y += allocation.height; *x = CLAMP (*x, 0, MAX (0, gdk_screen_get_width (screen) - req.width)); *y = CLAMP (*y, 0, MAX (0, gdk_screen_get_height (screen) - req.height)); } static void open_link_activate_cb (GtkMenuItem *menu_item, GtkLabel *label) { GtkLabelLink *link; link = gtk_label_get_current_link (label); if (link) emit_activate_link (label, link); } static void copy_link_activate_cb (GtkMenuItem *menu_item, GtkLabel *label) { GtkClipboard *clipboard; const gchar *uri; uri = gtk_label_get_current_uri (label); if (uri) { clipboard = gtk_widget_get_clipboard (GTK_WIDGET (label), GDK_SELECTION_CLIPBOARD); gtk_clipboard_set_text (clipboard, uri, -1); } } static gboolean gtk_label_popup_menu (GtkWidget *widget) { gtk_label_do_popup (GTK_LABEL (widget), NULL); return TRUE; } static void gtk_label_do_popup (GtkLabel *label, GdkEventButton *event) { GtkLabelPrivate *priv = label->priv; GtkWidget *menuitem; GtkWidget *menu; GtkWidget *image; gboolean have_selection; GtkLabelLink *link; if (!priv->select_info) return; if (priv->select_info->popup_menu) gtk_widget_destroy (priv->select_info->popup_menu); priv->select_info->popup_menu = menu = gtk_menu_new (); gtk_menu_attach_to_widget (GTK_MENU (menu), GTK_WIDGET (label), popup_menu_detach); have_selection = priv->select_info->selection_anchor != priv->select_info->selection_end; if (event) { if (priv->select_info->link_clicked) link = priv->select_info->active_link; else link = NULL; } else link = gtk_label_get_focus_link (label); if (!have_selection && link) { /* Open Link */ menuitem = gtk_image_menu_item_new_with_mnemonic (_("_Open Link")); gtk_widget_show (menuitem); gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem); g_signal_connect (G_OBJECT (menuitem), "activate", G_CALLBACK (open_link_activate_cb), label); image = gtk_image_new_from_stock (GTK_STOCK_JUMP_TO, GTK_ICON_SIZE_MENU); gtk_widget_show (image); gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (menuitem), image); /* Copy Link Address */ menuitem = gtk_image_menu_item_new_with_mnemonic (_("Copy _Link Address")); gtk_widget_show (menuitem); gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem); g_signal_connect (G_OBJECT (menuitem), "activate", G_CALLBACK (copy_link_activate_cb), label); image = gtk_image_new_from_stock (GTK_STOCK_COPY, GTK_ICON_SIZE_MENU); gtk_widget_show (image); gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (menuitem), image); } else { append_action_signal (label, menu, GTK_STOCK_CUT, "cut-clipboard", FALSE); append_action_signal (label, menu, GTK_STOCK_COPY, "copy-clipboard", have_selection); append_action_signal (label, menu, GTK_STOCK_PASTE, "paste-clipboard", FALSE); menuitem = gtk_image_menu_item_new_from_stock (GTK_STOCK_DELETE, NULL); gtk_widget_set_sensitive (menuitem, FALSE); gtk_widget_show (menuitem); gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem); menuitem = gtk_separator_menu_item_new (); gtk_widget_show (menuitem); gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem); menuitem = gtk_image_menu_item_new_from_stock (GTK_STOCK_SELECT_ALL, NULL); g_signal_connect_swapped (menuitem, "activate", G_CALLBACK (gtk_label_select_all), label); gtk_widget_show (menuitem); gtk_menu_shell_append (GTK_MENU_SHELL (menu), menuitem); } g_signal_emit (label, signals[POPULATE_POPUP], 0, menu); if (event) gtk_menu_popup (GTK_MENU (menu), NULL, NULL, NULL, NULL, event->button, event->time); else { gtk_menu_popup (GTK_MENU (menu), NULL, NULL, popup_position_func, label, 0, gtk_get_current_event_time ()); gtk_menu_shell_select_first (GTK_MENU_SHELL (menu), FALSE); } } static void gtk_label_clear_links (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; if (!priv->select_info) return; g_list_foreach (priv->select_info->links, (GFunc)link_free, NULL); g_list_free (priv->select_info->links); priv->select_info->links = NULL; priv->select_info->active_link = NULL; } static void gtk_label_rescan_links (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; PangoLayout *layout = priv->layout; PangoAttrList *attlist; PangoAttrIterator *iter; GList *links; if (!priv->select_info || !priv->select_info->links) return; attlist = pango_layout_get_attributes (layout); if (attlist == NULL) return; iter = pango_attr_list_get_iterator (attlist); links = priv->select_info->links; do { PangoAttribute *underline; PangoAttribute *color; underline = pango_attr_iterator_get (iter, PANGO_ATTR_UNDERLINE); color = pango_attr_iterator_get (iter, PANGO_ATTR_FOREGROUND); if (underline != NULL && color != NULL) { gint start, end; PangoRectangle start_pos; PangoRectangle end_pos; GtkLabelLink *link; pango_attr_iterator_range (iter, &start, &end); pango_layout_index_to_pos (layout, start, &start_pos); pango_layout_index_to_pos (layout, end, &end_pos); if (links == NULL) { g_warning ("Ran out of links"); break; } link = links->data; links = links->next; link->start = start; link->end = end; } } while (pango_attr_iterator_next (iter)); pango_attr_iterator_destroy (iter); } static gboolean gtk_label_activate_link (GtkLabel *label, const gchar *uri) { GtkWidget *widget = GTK_WIDGET (label); GError *error = NULL; if (!gtk_show_uri (gtk_widget_get_screen (widget), uri, gtk_get_current_event_time (), &error)) { g_warning ("Unable to show '%s': %s", uri, error->message); g_error_free (error); } return TRUE; } static void emit_activate_link (GtkLabel *label, GtkLabelLink *link) { GtkLabelPrivate *priv = label->priv; gboolean handled; g_signal_emit (label, signals[ACTIVATE_LINK], 0, link->uri, &handled); if (handled && priv->track_links && !link->visited) { link->visited = TRUE; /* FIXME: shouldn't have to redo everything here */ gtk_label_recalculate (label); } } static void gtk_label_activate_current_link (GtkLabel *label) { GtkLabelLink *link; GtkWidget *widget = GTK_WIDGET (label); link = gtk_label_get_focus_link (label); if (link) { emit_activate_link (label, link); } else { GtkWidget *toplevel; GtkWindow *window; GtkWidget *default_widget, *focus_widget; toplevel = gtk_widget_get_toplevel (widget); if (GTK_IS_WINDOW (toplevel)) { window = GTK_WINDOW (toplevel); if (window) { default_widget = gtk_window_get_default_widget (window); focus_widget = gtk_window_get_focus (window); if (default_widget != widget && !(widget == focus_widget && (!default_widget || !gtk_widget_is_sensitive (default_widget)))) gtk_window_activate_default (window); } } } } static GtkLabelLink * gtk_label_get_current_link (GtkLabel *label) { GtkLabelPrivate *priv = label->priv; GtkLabelLink *link; if (!priv->select_info) return NULL; if (priv->select_info->link_clicked) link = priv->select_info->active_link; else link = gtk_label_get_focus_link (label); return link; } /** * gtk_label_get_current_uri: * @label: a #GtkLabel * * Returns the URI for the currently active link in the label. * The active link is the one under the mouse pointer or, in a * selectable label, the link in which the text cursor is currently * positioned. * * This function is intended for use in a #GtkLabel::activate-link handler * or for use in a #GtkWidget::query-tooltip handler. * * Returns: the currently active URI. The string is owned by GTK+ and must * not be freed or modified. * * Since: 2.18 */ G_CONST_RETURN gchar * gtk_label_get_current_uri (GtkLabel *label) { GtkLabelLink *link; g_return_val_if_fail (GTK_IS_LABEL (label), NULL); link = gtk_label_get_current_link (label); if (link) return link->uri; return NULL; } /** * gtk_label_set_track_visited_links: * @label: a #GtkLabel * @track_links: %TRUE to track visited links * * Sets whether the label should keep track of clicked * links (and use a different color for them). * * Since: 2.18 */ void gtk_label_set_track_visited_links (GtkLabel *label, gboolean track_links) { GtkLabelPrivate *priv; g_return_if_fail (GTK_IS_LABEL (label)); priv = label->priv; track_links = track_links != FALSE; if (priv->track_links != track_links) { priv->track_links = track_links; /* FIXME: shouldn't have to redo everything here */ gtk_label_recalculate (label); g_object_notify (G_OBJECT (label), "track-visited-links"); } } /** * gtk_label_get_track_visited_links: * @label: a #GtkLabel * * Returns whether the label is currently keeping track * of clicked links. * * Returns: %TRUE if clicked links are remembered * * Since: 2.18 */ gboolean gtk_label_get_track_visited_links (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); return label->priv->track_links; } static gboolean gtk_label_query_tooltip (GtkWidget *widget, gint x, gint y, gboolean keyboard_tip, GtkTooltip *tooltip) { GtkLabel *label = GTK_LABEL (widget); GtkLabelPrivate *priv = label->priv; GtkLabelSelectionInfo *info = priv->select_info; gint index = -1; GList *l; if (info && info->links) { if (keyboard_tip) { if (info->selection_anchor == info->selection_end) index = info->selection_anchor; } else { if (!get_layout_index (label, x, y, &index)) index = -1; } if (index != -1) { for (l = info->links; l != NULL; l = l->next) { GtkLabelLink *link = l->data; if (index >= link->start && index <= link->end) { if (link->title) { gtk_tooltip_set_markup (tooltip, link->title); return TRUE; } break; } } } } return GTK_WIDGET_CLASS (gtk_label_parent_class)->query_tooltip (widget, x, y, keyboard_tip, tooltip); }