/* 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 #include #include #include "gtkalias.h" #include "gtklabel.h" #include "gtkmain.h" #include "gtkmarshalers.h" #include "gtkwindow.h" #include "gdk/gdkkeysyms.h" #include "gtkclipboard.h" #include #include "gtkimagemenuitem.h" #include "gtkintl.h" #include "gtkseparatormenuitem.h" #include "gtkmenuitem.h" #include "gtknotebook.h" #include "gtkstock.h" #include "gtkbindings.h" struct _GtkLabelSelectionInfo { GdkWindow *window; gint selection_anchor; gint selection_end; GtkWidget *popup_menu; }; enum { MOVE_CURSOR, COPY_CLIPBOARD, POPULATE_POPUP, LAST_SIGNAL }; enum { PROP_0, PROP_LABEL, PROP_ATTRIBUTES, PROP_USE_MARKUP, PROP_USE_UNDERLINE, PROP_JUSTIFY, PROP_PATTERN, PROP_WRAP, PROP_SELECTABLE, PROP_MNEMONIC_KEYVAL, PROP_MNEMONIC_WIDGET, PROP_CURSOR_POSITION, PROP_SELECTION_BOUND, PROP_ELLIPSIZE }; static guint signals[LAST_SIGNAL] = { 0 }; static void gtk_label_class_init (GtkLabelClass *klass); static void gtk_label_init (GtkLabel *label); 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_destroy (GtkObject *object); static void gtk_label_finalize (GObject *object); static void gtk_label_size_request (GtkWidget *widget, GtkRequisition *requisition); 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_set (GtkWidget *widget, GtkStyle *previous_style); static void gtk_label_direction_changed (GtkWidget *widget, GtkTextDirection previous_dir); static gint gtk_label_expose (GtkWidget *widget, GdkEventExpose *event); 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 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); static void set_markup (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 void gtk_label_create_window (GtkLabel *label); static void gtk_label_destroy_window (GtkLabel *label); static void gtk_label_clear_layout (GtkLabel *label); static void gtk_label_ensure_layout (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); /* For selectable lables: */ 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); static GtkMiscClass *parent_class = NULL; GType gtk_label_get_type (void) { static GType label_type = 0; if (!label_type) { static const GTypeInfo label_info = { sizeof (GtkLabelClass), NULL, /* base_init */ NULL, /* base_finalize */ (GClassInitFunc) gtk_label_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GtkLabel), 32, /* n_preallocs */ (GInstanceInitFunc) gtk_label_init, }; label_type = g_type_register_static (GTK_TYPE_MISC, "GtkLabel", &label_info, 0); } return label_type; } 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); GtkObjectClass *object_class = GTK_OBJECT_CLASS (class); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class); GtkBindingSet *binding_set; parent_class = g_type_class_peek_parent (class); gobject_class->set_property = gtk_label_set_property; gobject_class->get_property = gtk_label_get_property; gobject_class->finalize = gtk_label_finalize; object_class->destroy = gtk_label_destroy; widget_class->size_request = gtk_label_size_request; widget_class->size_allocate = gtk_label_size_allocate; widget_class->state_changed = gtk_label_state_changed; widget_class->style_set = gtk_label_style_set; widget_class->direction_changed = gtk_label_direction_changed; widget_class->expose_event = gtk_label_expose; 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->hierarchy_changed = gtk_label_hierarchy_changed; widget_class->screen_changed = gtk_label_screen_changed; widget_class->mnemonic_activate = gtk_label_mnemonic_activate; class->move_cursor = gtk_label_move_cursor; class->copy_clipboard = gtk_label_copy_clipboard; signals[MOVE_CURSOR] = g_signal_new ("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); signals[COPY_CLIPBOARD] = g_signal_new ("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); signals[POPULATE_POPUP] = g_signal_new ("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); g_object_class_install_property (gobject_class, PROP_LABEL, g_param_spec_string ("label", P_("Label"), P_("The text of the label"), NULL, G_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, G_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, G_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, G_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, G_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, G_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, G_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, G_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_VoidSymbol, G_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, G_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, G_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, G_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 "...". Ellipsizing labels must be packed in a container which * ensures that the label gets a reasonable size allocated. In particular, * this means that ellipsizing labels don't work well in notebook tabs, unless * the tab's ::tab-expand property is set to %TRUE. * * 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, if at all"), PANGO_TYPE_ELLIPSIZE_MODE, PANGO_ELLIPSIZE_NONE, G_PARAM_READWRITE)); /* * Key bindings */ binding_set = gtk_binding_set_by_class (class); /* Moving the insertion point */ add_move_binding (binding_set, GDK_Right, 0, GTK_MOVEMENT_VISUAL_POSITIONS, 1); add_move_binding (binding_set, GDK_Left, 0, GTK_MOVEMENT_VISUAL_POSITIONS, -1); add_move_binding (binding_set, GDK_KP_Right, 0, GTK_MOVEMENT_VISUAL_POSITIONS, 1); add_move_binding (binding_set, GDK_KP_Left, 0, GTK_MOVEMENT_VISUAL_POSITIONS, -1); add_move_binding (binding_set, GDK_f, GDK_CONTROL_MASK, GTK_MOVEMENT_LOGICAL_POSITIONS, 1); add_move_binding (binding_set, GDK_b, GDK_CONTROL_MASK, GTK_MOVEMENT_LOGICAL_POSITIONS, -1); add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK, GTK_MOVEMENT_WORDS, 1); add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK, GTK_MOVEMENT_WORDS, -1); add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK, GTK_MOVEMENT_WORDS, 1); add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK, GTK_MOVEMENT_WORDS, -1); add_move_binding (binding_set, GDK_a, GDK_CONTROL_MASK, GTK_MOVEMENT_PARAGRAPH_ENDS, -1); add_move_binding (binding_set, GDK_e, GDK_CONTROL_MASK, GTK_MOVEMENT_PARAGRAPH_ENDS, 1); add_move_binding (binding_set, GDK_f, GDK_MOD1_MASK, GTK_MOVEMENT_WORDS, 1); add_move_binding (binding_set, GDK_b, GDK_MOD1_MASK, GTK_MOVEMENT_WORDS, -1); add_move_binding (binding_set, GDK_Home, 0, GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1); add_move_binding (binding_set, GDK_End, 0, GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1); add_move_binding (binding_set, GDK_KP_Home, 0, GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1); add_move_binding (binding_set, GDK_KP_End, 0, GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1); add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK, GTK_MOVEMENT_BUFFER_ENDS, -1); add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK, GTK_MOVEMENT_BUFFER_ENDS, 1); add_move_binding (binding_set, GDK_KP_Home, GDK_CONTROL_MASK, GTK_MOVEMENT_BUFFER_ENDS, -1); add_move_binding (binding_set, GDK_KP_End, GDK_CONTROL_MASK, GTK_MOVEMENT_BUFFER_ENDS, 1); /* copy */ gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK, "copy_clipboard", 0); } static void gtk_label_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkLabel *label; 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_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; 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; label = GTK_LABEL (object); switch (prop_id) { case PROP_LABEL: g_value_set_string (value, label->label); break; case PROP_ATTRIBUTES: g_value_set_boxed (value, label->attrs); break; case PROP_USE_MARKUP: g_value_set_boolean (value, label->use_markup); break; case PROP_USE_UNDERLINE: g_value_set_boolean (value, label->use_underline); break; case PROP_JUSTIFY: g_value_set_enum (value, label->jtype); break; case PROP_WRAP: g_value_set_boolean (value, label->wrap); break; case PROP_SELECTABLE: g_value_set_boolean (value, gtk_label_get_selectable (label)); break; case PROP_MNEMONIC_KEYVAL: g_value_set_uint (value, label->mnemonic_keyval); break; case PROP_MNEMONIC_WIDGET: g_value_set_object (value, (GObject*) label->mnemonic_widget); break; case PROP_CURSOR_POSITION: if (label->select_info) { gint offset = g_utf8_pointer_to_offset (label->text, label->text + label->select_info->selection_end); g_value_set_int (value, offset); } else g_value_set_int (value, 0); break; case PROP_SELECTION_BOUND: if (label->select_info) { gint offset = g_utf8_pointer_to_offset (label->text, label->text + label->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, label->ellipsize); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_label_init (GtkLabel *label) { GTK_WIDGET_SET_FLAGS (label, GTK_NO_WINDOW); label->label = NULL; label->jtype = GTK_JUSTIFY_LEFT; label->wrap = FALSE; label->ellipsize = PANGO_ELLIPSIZE_NONE; label->use_underline = FALSE; label->use_markup = FALSE; label->mnemonic_keyval = GDK_VoidSymbol; label->layout = NULL; label->text = NULL; label->attrs = NULL; label->mnemonic_widget = NULL; label->mnemonic_window = NULL; gtk_label_set_text (label, ""); } /** * 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) { GtkWidget *parent; if (GTK_LABEL (widget)->mnemonic_widget) return gtk_widget_mnemonic_activate (GTK_LABEL (widget)->mnemonic_widget, group_cycling); /* Try to find the widget to activate by traversing the * widget's ancestry. */ parent = widget->parent; if (parent && GTK_IS_NOTEBOOK (parent)) return FALSE; while (parent) { if (GTK_WIDGET_CAN_FOCUS (parent) || (!group_cycling && GTK_WIDGET_GET_CLASS (parent)->activate_signal) || (parent->parent && GTK_IS_NOTEBOOK (parent->parent)) || (GTK_IS_MENU_ITEM (parent))) return gtk_widget_mnemonic_activate (parent, group_cycling); parent = parent->parent; } /* barf if there was nothing to activate */ g_warning ("Couldn't find a target for a mnemonic activation."); gdk_display_beep (gtk_widget_get_display (widget)); return FALSE; } static void gtk_label_setup_mnemonic (GtkLabel *label, guint last_key) { GtkWidget *toplevel; if (last_key != GDK_VoidSymbol && label->mnemonic_window) { gtk_window_remove_mnemonic (label->mnemonic_window, last_key, GTK_WIDGET (label)); label->mnemonic_window = NULL; } if (label->mnemonic_keyval == GDK_VoidSymbol) return; toplevel = gtk_widget_get_toplevel (GTK_WIDGET (label)); if (GTK_WIDGET_TOPLEVEL (toplevel)) { gtk_window_add_mnemonic (GTK_WINDOW (toplevel), label->mnemonic_keyval, GTK_WIDGET (label)); label->mnemonic_window = GTK_WINDOW (toplevel); } } static void gtk_label_hierarchy_changed (GtkWidget *widget, GtkWidget *old_toplevel) { GtkLabel *label = GTK_LABEL (widget); gtk_label_setup_mnemonic (label, label->mnemonic_keyval); } static void gtk_label_screen_changed (GtkWidget *widget, GdkScreen *old_screen) { gtk_label_clear_layout (GTK_LABEL (widget)); } static void label_mnemonic_widget_weak_notify (gpointer data, GObject *where_the_object_was) { GtkLabel *label = data; label->mnemonic_widget = NULL; g_object_notify (G_OBJECT (label), "mnemonic_widget"); } /** * gtk_label_set_mnemonic_widget: * @label: a #GtkLabel * @widget: 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 "mnemonic_activate" 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) { g_return_if_fail (GTK_IS_LABEL (label)); if (widget) g_return_if_fail (GTK_IS_WIDGET (widget)); if (label->mnemonic_widget) { gtk_widget_remove_mnemonic_label (label->mnemonic_widget, GTK_WIDGET (label)); g_object_weak_unref (G_OBJECT (label->mnemonic_widget), label_mnemonic_widget_weak_notify, label); } label->mnemonic_widget = widget; if (label->mnemonic_widget) { g_object_weak_ref (G_OBJECT (label->mnemonic_widget), label_mnemonic_widget_weak_notify, label); gtk_widget_add_mnemonic_label (label->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: 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->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_VoidSymbol); return label->mnemonic_keyval; } static void gtk_label_set_text_internal (GtkLabel *label, gchar *str) { g_free (label->text); label->text = str; gtk_label_select_region_index (label, 0, 0); } static void gtk_label_set_label_internal (GtkLabel *label, gchar *str) { g_free (label->label); label->label = str; g_object_notify (G_OBJECT (label), "label"); } static void gtk_label_set_use_markup_internal (GtkLabel *label, gboolean val) { val = val != FALSE; if (label->use_markup != val) { g_object_notify (G_OBJECT (label), "use_markup"); label->use_markup = val; } } static void gtk_label_set_use_underline_internal (GtkLabel *label, gboolean val) { val = val != FALSE; if (label->use_underline != val) { g_object_notify (G_OBJECT (label), "use_underline"); label->use_underline = val; } } static void gtk_label_set_attributes_internal (GtkLabel *label, PangoAttrList *attrs) { if (attrs) pango_attr_list_ref (attrs); if (label->attrs) pango_attr_list_unref (label->attrs); if (!label->use_markup && !label->use_underline) { if (attrs) pango_attr_list_ref (attrs); if (label->effective_attrs) pango_attr_list_unref (label->effective_attrs); label->effective_attrs = attrs; } label->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) { if (label->use_markup) set_markup (label, label->label, label->use_underline); else { if (label->use_underline) gtk_label_set_uline_text_internal (label, label->label); else { gtk_label_set_text_internal (label, g_strdup (label->label)); if (label->attrs) pango_attr_list_ref (label->attrs); if (label->effective_attrs) pango_attr_list_unref (label->effective_attrs); label->effective_attrs = label->attrs; } } if (!label->use_underline) { guint keyval = label->mnemonic_keyval; label->mnemonic_keyval = GDK_VoidSymbol; gtk_label_setup_mnemonic (label, keyval); } gtk_label_clear_layout (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 ignored * if the "use_underline" property or the "use_markup" property * is %TRUE. **/ 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_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: 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->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 label->use_underline and label->use_markup. **/ void gtk_label_set_label (GtkLabel *label, const gchar *str) { guint last_keyval; g_return_if_fail (GTK_IS_LABEL (label)); g_return_if_fail (str != NULL); last_keyval = label->mnemonic_keyval; gtk_label_set_label_internal (label, g_strdup (str)); gtk_label_recalculate (label); if (last_keyval != label->mnemonic_keyval) gtk_label_setup_mnemonic (label, last_keyval); } /** * 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->label; } static void set_markup (GtkLabel *label, const gchar *str, gboolean with_uline) { gchar *text = NULL; GError *error = NULL; PangoAttrList *attrs = NULL; gunichar accel_char = 0; if (!pango_parse_markup (str, -1, with_uline ? '_' : 0, &attrs, &text, with_uline ? &accel_char : NULL, &error)) { g_warning ("Failed to set label from markup due to error parsing markup: %s", error->message); g_error_free (error); return; } if (text) gtk_label_set_text_internal (label, text); if (attrs) { if (label->effective_attrs) pango_attr_list_unref (label->effective_attrs); label->effective_attrs = attrs; } if (accel_char != 0) label->mnemonic_keyval = gdk_keyval_to_lower (gdk_unicode_to_keyval (accel_char)); else label->mnemonic_keyval = GDK_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)); 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); } /** * 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) { guint last_keyval; g_return_if_fail (GTK_IS_LABEL (label)); last_keyval = label->mnemonic_keyval; 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); gtk_label_setup_mnemonic (label, last_keyval); } /** * 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->text; } static PangoAttrList * gtk_label_pattern_to_attrs (GtkLabel *label, const gchar *pattern) { const char *start; const char *p = label->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 - label->text; attr->end_index = p - label->text; pango_attr_list_insert (attrs, attr); } else break; } return attrs; } static void gtk_label_set_pattern_internal (GtkLabel *label, const gchar *pattern) { PangoAttrList *attrs; g_return_if_fail (GTK_IS_LABEL (label)); attrs = gtk_label_pattern_to_attrs (label, pattern); if (label->effective_attrs) pango_attr_list_unref (label->effective_attrs); label->effective_attrs = attrs; } void gtk_label_set_pattern (GtkLabel *label, const gchar *pattern) { g_return_if_fail (GTK_IS_LABEL (label)); gtk_label_set_pattern_internal (label, pattern); 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) { g_return_if_fail (GTK_IS_LABEL (label)); g_return_if_fail (jtype >= GTK_JUSTIFY_LEFT && jtype <= GTK_JUSTIFY_FILL); if ((GtkJustification) label->jtype != jtype) { label->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->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) { g_return_if_fail (GTK_IS_LABEL (label)); g_return_if_fail (mode >= PANGO_ELLIPSIZE_NONE && mode <= PANGO_ELLIPSIZE_END); if ((PangoEllipsizeMode) label->ellipsize != mode) { label->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->ellipsize; } /** * 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. **/ void gtk_label_set_line_wrap (GtkLabel *label, gboolean wrap) { g_return_if_fail (GTK_IS_LABEL (label)); wrap = wrap != FALSE; if (label->wrap != wrap) { label->wrap = wrap; g_object_notify (G_OBJECT (label), "wrap"); gtk_widget_queue_resize (GTK_WIDGET (label)); } } /** * 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->wrap; } void gtk_label_get (GtkLabel *label, gchar **str) { g_return_if_fail (GTK_IS_LABEL (label)); g_return_if_fail (str != NULL); *str = label->text; } static void gtk_label_destroy (GtkObject *object) { GtkLabel *label = GTK_LABEL (object); gtk_label_set_mnemonic_widget (label, NULL); GTK_OBJECT_CLASS (parent_class)->destroy (object); } static void gtk_label_finalize (GObject *object) { GtkLabel *label; g_return_if_fail (GTK_IS_LABEL (object)); label = GTK_LABEL (object); g_free (label->label); g_free (label->text); if (label->layout) g_object_unref (label->layout); if (label->attrs) pango_attr_list_unref (label->attrs); if (label->effective_attrs) pango_attr_list_unref (label->effective_attrs); g_free (label->select_info); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gtk_label_clear_layout (GtkLabel *label) { if (label->layout) { g_object_unref (label->layout); label->layout = NULL; } } typedef struct _LabelWrapWidth LabelWrapWidth; struct _LabelWrapWidth { gint width; PangoFontDescription *font_desc; }; static void label_wrap_width_free (gpointer data) { LabelWrapWidth *wrap_width = data; pango_font_description_free (wrap_width->font_desc); g_free (wrap_width); } static gint get_label_wrap_width (GtkLabel *label) { PangoLayout *layout; GtkStyle *style = GTK_WIDGET (label)->style; LabelWrapWidth *wrap_width = g_object_get_data (G_OBJECT (style), "gtk-label-wrap-width"); if (!wrap_width) { wrap_width = g_new0 (LabelWrapWidth, 1); g_object_set_data_full (G_OBJECT (style), "gtk-label-wrap-width", wrap_width, label_wrap_width_free); } if (wrap_width->font_desc && pango_font_description_equal (wrap_width->font_desc, style->font_desc)) return wrap_width->width; if (wrap_width->font_desc) pango_font_description_free (wrap_width->font_desc); wrap_width->font_desc = pango_font_description_copy (style->font_desc); layout = gtk_widget_create_pango_layout (GTK_WIDGET (label), "This long string gives a good enough length for any line to have."); pango_layout_get_size (layout, &wrap_width->width, NULL); g_object_unref (layout); return wrap_width->width; } static void gtk_label_ensure_layout (GtkLabel *label) { GtkWidget *widget; PangoRectangle logical_rect; gint rwidth, rheight; gboolean rtl; widget = GTK_WIDGET (label); rtl = gtk_widget_get_direction(widget) == GTK_TEXT_DIR_RTL; rwidth = label->misc.xpad * 2; rheight = label->misc.ypad * 2; if (!label->layout) { PangoAlignment align = PANGO_ALIGN_LEFT; /* Quiet gcc */ label->layout = gtk_widget_create_pango_layout (widget, label->text); if (label->effective_attrs) pango_layout_set_attributes (label->layout, label->effective_attrs); switch (label->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: /* FIXME: This just doesn't work to do this */ align = rtl ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT; pango_layout_set_justify (label->layout, TRUE); break; default: g_assert_not_reached(); } pango_layout_set_alignment (label->layout, align); pango_layout_set_ellipsize (label->layout, label->ellipsize); if (label->ellipsize) pango_layout_set_width (label->layout, widget->allocation.width * PANGO_SCALE); else if (label->wrap) { GtkWidgetAuxInfo *aux_info; gint longest_paragraph; gint width, height; aux_info = _gtk_widget_get_aux_info (widget, FALSE); if (aux_info && aux_info->width > 0) pango_layout_set_width (label->layout, aux_info->width * PANGO_SCALE); else { GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (label)); gint wrap_width; pango_layout_set_width (label->layout, -1); pango_layout_get_extents (label->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); pango_layout_set_width (label->layout, width); pango_layout_get_extents (label->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 (label->layout); perfect_width = (longest_paragraph + nlines - 1) / nlines; if (perfect_width < width) { pango_layout_set_width (label->layout, perfect_width); pango_layout_get_extents (label->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) { pango_layout_set_width (label->layout, mid_width); pango_layout_get_extents (label->layout, NULL, &logical_rect); if (logical_rect.height <= height) width = logical_rect.width; } } } } pango_layout_set_width (label->layout, width); } } else /* !label->wrap */ pango_layout_set_width (label->layout, -1); } } static void gtk_label_size_request (GtkWidget *widget, GtkRequisition *requisition) { GtkLabel *label; gint width, height; PangoRectangle logical_rect; GtkWidgetAuxInfo *aux_info; g_return_if_fail (GTK_IS_LABEL (widget)); g_return_if_fail (requisition != NULL); label = GTK_LABEL (widget); /* * If word wrapping is on, then the height requisition can depend * on: * * - Any width set on the widget via gtk_widget_set_usize(). * - The padding of the widget (xpad, set by gtk_misc_set_padding) * * Instead of trying to detect changes to these quantities, if we * are wrapping, we just rewrap for each size request. Since * size requisitions are cached by the GTK+ core, this is not * expensive. */ if (label->wrap) gtk_label_clear_layout (label); gtk_label_ensure_layout (label); width = label->misc.xpad * 2; height = label->misc.ypad * 2; pango_layout_get_extents (label->layout, NULL, &logical_rect); aux_info = _gtk_widget_get_aux_info (widget, FALSE); if (label->ellipsize) { PangoContext *context; PangoFontMetrics *metrics; gint char_width; /* The minimum size for ellipsized labels is ~ 3 chars */ context = pango_layout_get_context (label->layout); metrics = pango_context_get_metrics (context, widget->style->font_desc, NULL); char_width = pango_font_metrics_get_approximate_char_width (metrics); pango_font_metrics_unref (metrics); width += (PANGO_PIXELS (char_width) * 3); } else { if (label->wrap && aux_info && aux_info->width > 0) width += aux_info->width; else width += PANGO_PIXELS (logical_rect.width); } height += PANGO_PIXELS (logical_rect.height); requisition->width = width; requisition->height = height; } static void gtk_label_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkLabel *label; label = GTK_LABEL (widget); (* GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation); if (label->ellipsize) { if (label->layout) pango_layout_set_width (label->layout, allocation->width * PANGO_SCALE); } if (label->select_info && label->select_info->window) { gdk_window_move_resize (label->select_info->window, allocation->x, allocation->y, allocation->width, allocation->height); } } static void gtk_label_state_changed (GtkWidget *widget, GtkStateType prev_state) { GtkLabel *label; label = GTK_LABEL (widget); if (label->select_info) gtk_label_select_region (label, 0, 0); if (GTK_WIDGET_CLASS (parent_class)->state_changed) GTK_WIDGET_CLASS (parent_class)->state_changed (widget, prev_state); } static void gtk_label_style_set (GtkWidget *widget, GtkStyle *previous_style) { GtkLabel *label; g_return_if_fail (GTK_IS_LABEL (widget)); label = GTK_LABEL (widget); /* We have to clear the layout, fonts etc. may have changed */ gtk_label_clear_layout (label); } static void gtk_label_direction_changed (GtkWidget *widget, GtkTextDirection previous_dir) { GtkLabel *label = GTK_LABEL (widget); if (label->layout) pango_layout_context_changed (label->layout); GTK_WIDGET_CLASS (parent_class)->direction_changed (widget, previous_dir); } #if 0 static void gtk_label_paint_word (GtkLabel *label, gint x, gint y, GtkLabelWord *word, GdkRectangle *area) { GtkWidget *widget = GTK_WIDGET (label); GtkLabelULine *uline; gchar *tmp_str; tmp_str = gdk_wcstombs (word->beginning); if (tmp_str) { gtk_paint_string (widget->style, widget->window, widget->state, area, widget, "label", x + word->x, y + word->y, tmp_str); g_free (tmp_str); } for (uline = word->uline; uline; uline = uline->next) gtk_paint_hline (widget->style, widget->window, widget->state, area, widget, "label", x + uline->x1, x + uline->x2, y + uline->y); } #endif static void get_layout_location (GtkLabel *label, gint *xp, gint *yp) { GtkMisc *misc; GtkWidget *widget; gfloat xalign; gint req_width, x, y; misc = GTK_MISC (label); widget = GTK_WIDGET (label); if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR) xalign = misc->xalign; else xalign = 1.0 - misc->xalign; if (label->ellipsize) { PangoRectangle ink_rect; pango_layout_get_extents (label->layout, &ink_rect, NULL); req_width = PANGO_PIXELS (ink_rect.width); } else req_width = widget->requisition.width; x = floor (widget->allocation.x + (gint)misc->xpad + xalign * (widget->allocation.width - req_width) + 0.5); if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR) x = MAX (x, widget->allocation.x + misc->xpad); else x = MIN (x, widget->allocation.x + widget->allocation.width - req_width - misc->xpad); y = floor (widget->allocation.y + (gint)misc->ypad + MAX (((widget->allocation.height - widget->requisition.height) * misc->yalign) + 0.5, 0)); if (xp) *xp = x; if (yp) *yp = y; } static void draw_insertion_cursor (GtkLabel *label, 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, widget->window, NULL, cursor_location, is_primary, text_dir, draw_arrow); } static PangoDirection get_cursor_direction (GtkLabel *label) { GSList *l; g_assert (label->select_info); gtk_label_ensure_layout (label); for (l = pango_layout_get_lines (label->layout); l; l = l->next) { PangoLayoutLine *line = l->data; /* If label->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 >= label->select_info->selection_end) return line->resolved_dir; } return PANGO_DIRECTION_LTR; } static void gtk_label_draw_cursor (GtkLabel *label, gint xoffset, gint yoffset) { if (label->select_info == NULL) return; if (GTK_WIDGET_DRAWABLE (label)) { GtkWidget *widget = GTK_WIDGET (label); 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 (label->layout, label->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, &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, &cursor_location, FALSE, dir2, TRUE); } } } static gint gtk_label_expose (GtkWidget *widget, GdkEventExpose *event) { GtkLabel *label; gint x, y; g_return_val_if_fail (GTK_IS_LABEL (widget), FALSE); g_return_val_if_fail (event != NULL, FALSE); label = GTK_LABEL (widget); gtk_label_ensure_layout (label); if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget) && label->text && (*label->text != '\0')) { get_layout_location (label, &x, &y); gtk_paint_layout (widget->style, widget->window, GTK_WIDGET_STATE (widget), FALSE, &event->area, widget, "label", x, y, label->layout); if (label->select_info && (label->select_info->selection_anchor != label->select_info->selection_end)) { gint range[2]; GdkRegion *clip; GtkStateType state; range[0] = label->select_info->selection_anchor; range[1] = label->select_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 (label->layout, x, y, range, 1); /* FIXME should use gtk_paint, but it can't use a clip * region */ gdk_gc_set_clip_region (widget->style->black_gc, clip); state = GTK_STATE_SELECTED; if (!GTK_WIDGET_HAS_FOCUS (widget)) state = GTK_STATE_ACTIVE; gdk_draw_layout_with_colors (widget->window, widget->style->black_gc, x, y, label->layout, &widget->style->text[state], &widget->style->base[state]); gdk_gc_set_clip_region (widget->style->black_gc, NULL); gdk_region_destroy (clip); } else if (label->select_info && GTK_WIDGET_HAS_FOCUS (widget)) gtk_label_draw_cursor (label, x, y); } return FALSE; } static void gtk_label_set_uline_text_internal (GtkLabel *label, const gchar *str) { guint accel_key = GDK_VoidSymbol; gchar *new_str; gchar *pattern; const gchar *src; gchar *dest, *pattern_dest; gboolean underscore; 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. */ new_str = g_new (gchar, strlen (str) + 1); pattern = g_new (gchar, g_utf8_strlen (str, -1) + 1); underscore = FALSE; if (str == NULL) str = ""; src = str; dest = new_str; pattern_dest = pattern; while (*src) { gunichar c; 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; } next_src = g_utf8_next_char (src); if (underscore) { if (c == '_') *pattern_dest++ = ' '; else { *pattern_dest++ = '_'; if (accel_key == GDK_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; gtk_label_set_text_internal (label, new_str); gtk_label_set_pattern_internal (label, pattern); g_free (pattern); label->mnemonic_keyval = accel_key; } guint gtk_label_parse_uline (GtkLabel *label, const gchar *str) { guint keyval; guint orig_keyval; g_return_val_if_fail (GTK_IS_LABEL (label), GDK_VoidSymbol); g_return_val_if_fail (str != NULL, GDK_VoidSymbol); orig_keyval = label->mnemonic_keyval; 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); keyval = label->mnemonic_keyval; label->mnemonic_keyval = GDK_VoidSymbol; gtk_label_setup_mnemonic (label, orig_keyval); g_object_thaw_notify (G_OBJECT (label)); return keyval; } /** * 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) { guint last_keyval; g_return_if_fail (GTK_IS_LABEL (label)); g_return_if_fail (str != NULL); last_keyval = label->mnemonic_keyval; 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); gtk_label_setup_mnemonic (label, last_keyval); g_object_thaw_notify (G_OBJECT (label)); } static void gtk_label_realize (GtkWidget *widget) { GtkLabel *label; label = GTK_LABEL (widget); (* GTK_WIDGET_CLASS (parent_class)->realize) (widget); if (label->select_info) gtk_label_create_window (label); } static void gtk_label_unrealize (GtkWidget *widget) { GtkLabel *label; label = GTK_LABEL (widget); if (label->select_info) gtk_label_destroy_window (label); (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget); } static void gtk_label_map (GtkWidget *widget) { GtkLabel *label; label = GTK_LABEL (widget); (* GTK_WIDGET_CLASS (parent_class)->map) (widget); if (label->select_info) gdk_window_show (label->select_info->window); } static void gtk_label_unmap (GtkWidget *widget) { GtkLabel *label; label = GTK_LABEL (widget); if (label->select_info) gdk_window_hide (label->select_info->window); (* GTK_WIDGET_CLASS (parent_class)->unmap) (widget); } static void window_to_layout_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 += widget->allocation.x; /* go to widget->window */ *x -= lx; /* go to layout */ } if (y) { *y += widget->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 void get_layout_index (GtkLabel *label, gint x, gint y, gint *index) { gint trailing = 0; const gchar *cluster; const gchar *cluster_end; *index = 0; gtk_label_ensure_layout (label); window_to_layout_coords (label, &x, &y); x *= PANGO_SCALE; y *= PANGO_SCALE; pango_layout_xy_to_index (label->layout, x, y, index, &trailing); cluster = label->text + *index; cluster_end = cluster; while (trailing) { cluster_end = g_utf8_next_char (cluster_end); --trailing; } *index += (cluster_end - cluster); } static void gtk_label_select_word (GtkLabel *label) { gint min, max; gint start_index = gtk_label_move_backward_word (label, label->select_info->selection_end); gint end_index = gtk_label_move_forward_word (label, label->select_info->selection_end); min = MIN (label->select_info->selection_anchor, label->select_info->selection_end); max = MAX (label->select_info->selection_anchor, label->select_info->selection_end); min = MIN (min, start_index); max = MAX (max, end_index); gtk_label_select_region_index (label, min, max); } static gboolean gtk_label_button_press (GtkWidget *widget, GdkEventButton *event) { GtkLabel *label; gint index = 0; label = GTK_LABEL (widget); if (label->select_info == NULL) return FALSE; if (event->button == 1) { if (!GTK_WIDGET_HAS_FOCUS (widget)) gtk_widget_grab_focus (widget); if (event->type == GDK_3BUTTON_PRESS) { gtk_label_select_region_index (label, 0, strlen (label->text)); return TRUE; } if (event->type == GDK_2BUTTON_PRESS) { gtk_label_select_word (label); return TRUE; } get_layout_index (label, event->x, event->y, &index); if ((label->select_info->selection_anchor != label->select_info->selection_end) && (event->state & GDK_SHIFT_MASK)) { gint min, max; /* extend (same as motion) */ min = MIN (label->select_info->selection_anchor, label->select_info->selection_end); max = MAX (label->select_info->selection_anchor, label->select_info->selection_end); 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 (label->text)); else if (event->type == GDK_2BUTTON_PRESS) gtk_label_select_word (label); 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; label = GTK_LABEL (widget); if (label->select_info == NULL) return FALSE; if (event->button != 1) return FALSE; /* The goal here is to return TRUE iff we ate the * button press to start selecting. */ return TRUE; } static gboolean gtk_label_motion (GtkWidget *widget, GdkEventMotion *event) { GtkLabel *label; gint index; gint x, y; label = GTK_LABEL (widget); if (label->select_info == NULL) return FALSE; if ((event->state & GDK_BUTTON1_MASK) == 0) return FALSE; gdk_window_get_pointer (label->select_info->window, &x, &y, NULL); get_layout_index (label, x, y, &index); gtk_label_select_region_index (label, label->select_info->selection_anchor, index); return TRUE; } static void gtk_label_create_window (GtkLabel *label) { GtkWidget *widget; GdkWindowAttr attributes; gint attributes_mask; g_assert (label->select_info); g_assert (GTK_WIDGET_REALIZED (label)); if (label->select_info->window) return; widget = GTK_WIDGET (label); attributes.x = widget->allocation.x; attributes.y = widget->allocation.y; attributes.width = widget->allocation.width; attributes.height = widget->allocation.height; attributes.window_type = GDK_WINDOW_TEMP; attributes.wclass = GDK_INPUT_ONLY; attributes.override_redirect = TRUE; attributes.cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget), GDK_XTERM); attributes.event_mask = gtk_widget_get_events (widget) | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_MOTION_MASK; attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR | GDK_WA_CURSOR; label->select_info->window = gdk_window_new (widget->window, &attributes, attributes_mask); gdk_window_set_user_data (label->select_info->window, widget); gdk_cursor_unref (attributes.cursor); } static void gtk_label_destroy_window (GtkLabel *label) { g_assert (label->select_info); if (label->select_info->window == NULL) return; gdk_window_set_user_data (label->select_info->window, NULL); gdk_window_destroy (label->select_info->window); label->select_info->window = NULL; } /** * 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) { gboolean old_setting; g_return_if_fail (GTK_IS_LABEL (label)); setting = setting != FALSE; old_setting = label->select_info != NULL; if (setting) { if (label->select_info == NULL) { label->select_info = g_new0 (GtkLabelSelectionInfo, 1); GTK_WIDGET_SET_FLAGS (label, GTK_CAN_FOCUS); if (GTK_WIDGET_REALIZED (label)) gtk_label_create_window (label); if (GTK_WIDGET_MAPPED (label)) gdk_window_show (label->select_info->window); } } else { if (label->select_info) { /* unselect, to give up the selection */ gtk_label_select_region (label, 0, 0); if (label->select_info->window) { gtk_label_destroy_window (label); } g_free (label->select_info); label->select_info = NULL; GTK_WIDGET_UNSET_FLAGS (label, GTK_CAN_FOCUS); } } 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) { g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); return label->select_info != NULL; } static void get_text_callback (GtkClipboard *clipboard, GtkSelectionData *selection_data, guint info, gpointer user_data_or_owner) { GtkLabel *label; label = GTK_LABEL (user_data_or_owner); if ((label->select_info->selection_anchor != label->select_info->selection_end) && label->text) { gint start, end; gint len; start = MIN (label->select_info->selection_anchor, label->select_info->selection_end); end = MAX (label->select_info->selection_anchor, label->select_info->selection_end); len = strlen (label->text); if (end > len) end = len; if (start > len) start = len; gtk_selection_data_set_text (selection_data, label->text + start, end - start); } } static void clear_text_callback (GtkClipboard *clipboard, gpointer user_data_or_owner) { GtkLabel *label; label = GTK_LABEL (user_data_or_owner); if (label->select_info) { label->select_info->selection_anchor = label->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) { static const GtkTargetEntry targets[] = { { "STRING", 0, 0 }, { "TEXT", 0, 0 }, { "COMPOUND_TEXT", 0, 0 }, { "UTF8_STRING", 0, 0 } }; g_return_if_fail (GTK_IS_LABEL (label)); if (label->select_info) { GtkClipboard *clipboard; if (label->select_info->selection_anchor == anchor_index && label->select_info->selection_end == end_index) return; label->select_info->selection_anchor = anchor_index; label->select_info->selection_end = end_index; clipboard = gtk_widget_get_clipboard (GTK_WIDGET (label), GDK_SELECTION_PRIMARY); if (anchor_index != end_index) { gtk_clipboard_set_with_owner (clipboard, targets, G_N_ELEMENTS (targets), get_text_callback, clear_text_callback, G_OBJECT (label)); } 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) { g_return_if_fail (GTK_IS_LABEL (label)); if (label->text && label->select_info) { if (start_offset < 0) start_offset = g_utf8_strlen (label->text, -1); if (end_offset < 0) end_offset = g_utf8_strlen (label->text, -1); gtk_label_select_region_index (label, g_utf8_offset_to_pointer (label->text, start_offset) - label->text, g_utf8_offset_to_pointer (label->text, end_offset) - label->text); } } /** * gtk_label_get_selection_bounds: * @label: a #GtkLabel * @start: return location for start of selection, as a character offset * @end: 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) { g_return_val_if_fail (GTK_IS_LABEL (label), FALSE); if (label->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 (label->select_info->selection_anchor, label->select_info->selection_end); end_index = MAX (label->select_info->selection_anchor, label->select_info->selection_end); len = strlen (label->text); if (end_index > len) end_index = len; if (start_index > len) start_index = len; start_offset = g_utf8_strlen (label->text, start_index); end_offset = g_utf8_strlen (label->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. * * Return value: the #PangoLayout for this label **/ PangoLayout* gtk_label_get_layout (GtkLabel *label) { g_return_val_if_fail (GTK_IS_LABEL (label), NULL); gtk_label_ensure_layout (label); return label->layout; } /** * gtk_label_get_layout_offsets: * @label: a #GtkLabel * @x: location to store X offset of layout, or %NULL * @y: 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)); 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->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); if (label->use_underline) gtk_label_setup_mnemonic (label, label->mnemonic_keyval); } /** * 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->use_underline; } /* 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) { 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 (label->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) { gint offset = g_utf8_pointer_to_offset (label->text, label->text + start); if (label->text) { PangoLogAttr *log_attrs; gint n_attrs; gint length; gtk_label_ensure_layout (label); length = g_utf8_strlen (label->text, -1); pango_layout_get_log_attrs (label->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 (label->text, offset) - label->text; } static gint gtk_label_move_visually (GtkLabel *label, gint start, gint count) { 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 (label->layout, strong, index, 0, 1, &new_index, &new_trailing); count--; } else { pango_layout_move_cursor_visually (label->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 (label->text + new_index) - label->text; } return index; } static gint gtk_label_move_forward_word (GtkLabel *label, gint start) { gint new_pos = g_utf8_pointer_to_offset (label->text, label->text + start); gint length; length = g_utf8_strlen (label->text, -1); if (new_pos < length) { PangoLogAttr *log_attrs; gint n_attrs; gtk_label_ensure_layout (label); pango_layout_get_log_attrs (label->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 (label->text, new_pos) - label->text; } static gint gtk_label_move_backward_word (GtkLabel *label, gint start) { gint new_pos = g_utf8_pointer_to_offset (label->text, label->text + start); gint length; length = g_utf8_strlen (label->text, -1); if (new_pos > 0) { PangoLogAttr *log_attrs; gint n_attrs; gtk_label_ensure_layout (label); pango_layout_get_log_attrs (label->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 (label->text, new_pos) - label->text; } static void gtk_label_move_cursor (GtkLabel *label, GtkMovementStep step, gint count, gboolean extend_selection) { gint new_pos; if (label->select_info == NULL) return; new_pos = label->select_info->selection_end; if (label->select_info->selection_end != label->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, label->select_info->selection_end, &end_x, &end_y); get_better_cursor (label, label->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 ? label->select_info->selection_end : label->select_info->selection_anchor; else new_pos = !end_is_left ? label->select_info->selection_end : label->select_info->selection_anchor; break; } case GTK_MOVEMENT_LOGICAL_POSITIONS: case GTK_MOVEMENT_WORDS: if (count < 0) new_pos = MIN (label->select_info->selection_end, label->select_info->selection_anchor); else new_pos = MAX (label->select_info->selection_end, label->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 (label->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); 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++; } 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 (label->text); 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, label->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) { if (label->text && label->select_info) { gint start, end; gint len; start = MIN (label->select_info->selection_anchor, label->select_info->selection_end); end = MAX (label->select_info->selection_anchor, label->select_info->selection_end); len = strlen (label->text); if (end > len) end = len; if (start > len) start = len; if (start != end) gtk_clipboard_set_text (gtk_widget_get_clipboard (GTK_WIDGET (label), GDK_SELECTION_CLIPBOARD), label->text + start, end - start); } } static void gtk_label_select_all (GtkLabel *label) { gtk_label_select_region_index (label, 0, strlen (label->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), "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; label = GTK_LABEL (attach_widget); if (label->select_info) label->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; GtkRequisition req; GdkScreen *screen; label = GTK_LABEL (user_data); widget = GTK_WIDGET (label); if (label->select_info == NULL) return; g_return_if_fail (GTK_WIDGET_REALIZED (label)); screen = gtk_widget_get_screen (widget); gdk_window_get_origin (widget->window, x, y); gtk_widget_size_request (label->select_info->popup_menu, &req); *x += widget->allocation.width / 2; *y += widget->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 gtk_label_do_popup (GtkLabel *label, GdkEventButton *event) { GtkWidget *menuitem; gboolean have_selection; if (label->select_info == NULL) return; if (label->select_info->popup_menu) gtk_widget_destroy (label->select_info->popup_menu); label->select_info->popup_menu = gtk_menu_new (); gtk_menu_attach_to_widget (GTK_MENU (label->select_info->popup_menu), GTK_WIDGET (label), popup_menu_detach); have_selection = label->select_info->selection_anchor != label->select_info->selection_end; append_action_signal (label, label->select_info->popup_menu, GTK_STOCK_CUT, "cut_clipboard", FALSE); append_action_signal (label, label->select_info->popup_menu, GTK_STOCK_COPY, "copy_clipboard", have_selection); append_action_signal (label, label->select_info->popup_menu, GTK_STOCK_PASTE, "paste_clipboard", FALSE); menuitem = gtk_menu_item_new_with_label (_("Select All")); g_signal_connect_swapped (menuitem, "activate", G_CALLBACK (gtk_label_select_all), label); gtk_widget_show (menuitem); gtk_menu_shell_append (GTK_MENU_SHELL (label->select_info->popup_menu), menuitem); menuitem = gtk_separator_menu_item_new (); gtk_widget_show (menuitem); gtk_menu_shell_append (GTK_MENU_SHELL (label->select_info->popup_menu), menuitem); menuitem = gtk_menu_item_new_with_label (_("Input Methods")); gtk_widget_show (menuitem); gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), gtk_menu_new ()); gtk_widget_set_sensitive (menuitem, FALSE); gtk_menu_shell_append (GTK_MENU_SHELL (label->select_info->popup_menu), menuitem); g_signal_emit (label, signals[POPULATE_POPUP], 0, label->select_info->popup_menu); if (event) gtk_menu_popup (GTK_MENU (label->select_info->popup_menu), NULL, NULL, NULL, NULL, event->button, event->time); else gtk_menu_popup (GTK_MENU (label->select_info->popup_menu), NULL, NULL, popup_position_func, label, 0, gtk_get_current_event_time ()); }