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gtk2/gtk/gtklabel.c
Benjamin Otte 8f1f743903 gtk: Use g_object_unref instead of gdk_cursor_unref
2010-12-21 12:07:05 -05:00

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/* 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 <math.h>
#include <string.h>
#include "gtklabel.h"
#include "gtkaccellabel.h"
#include "gtkdnd.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkpango.h"
#include "gtkwindow.h"
#include "gdk/gdkkeysyms.h"
#include "gtkclipboard.h"
#include "gtkimagemenuitem.h"
#include "gtkintl.h"
#include "gtkseparatormenuitem.h"
#include "gtktextutil.h"
#include "gtkmenuitem.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"
/*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, gboolean guess_wrap_width);
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
* <link linkend="keybinding-signals">keybinding signal</link>
* 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.
* <itemizedlist>
* <listitem>Arrow keys move by individual characters/lines</listitem>
* <listitem>Ctrl-arrow key combinations move by words/paragraphs</listitem>
* <listitem>Home/End keys move to the ends of the buffer</listitem>
* </itemizedlist>
*/
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
* <link linkend="keybinding-signals">keybinding signal</link>
* 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 <link linkend="keybinding-signals">keybinding signal</link>
* 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 <link linkend="label-text-layout">text layout</link>
* 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 <link linkend="label-text-layout">text layout</link>
* 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>",
"<input>",
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\"",
"<input>",
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.
*
* <note><para>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.</para></note>
**/
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: 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 <a> 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 <a> 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,
"<span color=\"#%04x%04x%04x\" underline=\"single\">",
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, "</span>");
else
{
g_string_append (pdata->new_str, "</");
g_string_append (pdata->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, "<markup>", 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, "<markup>", -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, "</markup>", -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 <link linkend="PangoMarkupFormat">Pango markup format</link>)
*
* Parses @str which is marked up with the <link
* linkend="PangoMarkupFormat">Pango text markup language</link>, 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 ("&lt;span style=\"italic\"&gt;&percnt;s&lt;/span&gt;", str);
* gtk_label_set_markup (GTK_LABEL (label), markup);
* g_free (markup);
* ]|
**/
void
gtk_label_set_markup (GtkLabel *label,
const gchar *str)
{
GtkLabelPrivate *priv;
g_return_if_fail (GTK_IS_LABEL (label));
priv = label->priv;
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 <link linkend="PangoMarkupFormat">Pango markup format</link>)
*
* Parses @str which is marked up with the <link linkend="PangoMarkupFormat">Pango text markup language</link>,
* 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)
{
GtkLabelPrivate *priv;
g_return_if_fail (GTK_IS_LABEL (label));
priv = label->priv;
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;
}
static void
get_label_width (GtkLabel *label,
gint *minimum,
gint *natural)
{
GtkLabelPrivate *priv;
PangoLayout *layout;
PangoContext *context;
PangoFontMetrics *metrics;
PangoRectangle rect;
gint char_width, digit_width, char_pixels, text_width, ellipsize_chars, guess_width;
priv = label->priv;
layout = pango_layout_copy (priv->layout);
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);
/* Fetch the length of the complete unwrapped text */
pango_layout_set_width (layout, -1);
pango_layout_get_extents (layout, NULL, &rect);
text_width = rect.width;
/* Fetch the width that was guessed by gtk_label_ensure_layout() */
pango_layout_get_extents (priv->layout, NULL, &rect);
guess_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)
{
*minimum = 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)
*minimum = guess_width;
if (priv->max_width_chars < 0)
{
*natural = MAX (*minimum, 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)
*minimum = MIN (text_width, max_width);
*natural = MAX (*minimum, max_width);
}
}
else
{
*minimum = text_width;
*natural = *minimum;
}
/* 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)
{
*minimum = aux_info->width * PANGO_SCALE;
*natural = MAX (*natural, *minimum);
}
}
g_object_unref (layout);
}
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 = pango_layout_copy (priv->layout);
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_set_width (layout, -1);
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 void
gtk_label_ensure_layout (GtkLabel *label, gboolean guess_wrap_width)
{
GtkLabelPrivate *priv = label->priv;
GtkWidget *widget;
PangoRectangle logical_rect;
gboolean rtl;
widget = GTK_WIDGET (label);
rtl = gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL;
if (!priv->layout)
{
GtkAllocation allocation;
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_widget_get_allocation (widget, &allocation);
if (priv->ellipsize)
pango_layout_set_width (priv->layout, allocation.width * PANGO_SCALE);
else if (priv->wrap)
{
GtkWidgetAuxInfo *aux_info = _gtk_widget_get_aux_info (widget, FALSE);
gint longest_paragraph;
gint width, height;
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 if (guess_wrap_width == FALSE && allocation.width > 1 && allocation.height > 1)
{
PangoRectangle rect;
gint xpad, ypad, natural_width;
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;
/* dont set a wrap width wider than the label's natural width
* incase we're allocated more space than needed */
pango_layout_get_extents (priv->layout, NULL, &rect);
natural_width = PANGO_PIXELS (rect.width);
width = MIN (natural_width, width);
pango_layout_set_wrap (priv->layout, priv->wrap_mode);
pango_layout_set_width (priv->layout, MAX (width, 1) * PANGO_SCALE);
}
else
{
GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (label));
gint wrap_width;
pango_layout_set_width (priv->layout, -1);
pango_layout_get_extents (priv->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 (priv->layout, width);
pango_layout_get_extents (priv->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 (priv->layout);
perfect_width = (longest_paragraph + nlines - 1) / nlines;
if (perfect_width < width)
{
pango_layout_set_width (priv->layout, perfect_width);
pango_layout_get_extents (priv->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 (priv->layout, mid_width);
pango_layout_get_extents (priv->layout, NULL, &logical_rect);
if (logical_rect.height <= height)
width = logical_rect.width;
}
}
}
}
pango_layout_set_width (priv->layout, width);
}
}
else /* !priv->wrap */
pango_layout_set_width (priv->layout, -1);
}
}
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 (angle == 90 || angle == 270)
return GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT;
return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
}
static void
get_size_for_allocation (GtkLabel *label,
GtkOrientation orientation,
gint allocation,
gint *minimum_size,
gint *natural_size)
{
GtkLabelPrivate *priv = label->priv;
PangoLayout *layout;
GtkWidgetAuxInfo *aux_info =
_gtk_widget_get_aux_info (GTK_WIDGET (label), FALSE);
gint aux_size;
gint text_height;
gtk_label_ensure_layout (label, FALSE);
layout = pango_layout_copy (priv->layout);
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)
pango_layout_set_width (layout, aux_size * PANGO_SCALE);
else
pango_layout_set_width (layout, 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_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;
/* "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() */
if (priv->wrap)
gtk_label_clear_layout (label);
gtk_label_ensure_layout (label, TRUE);
/* Start off with the pixel extents of the rendered layout */
pango_layout_get_extents (priv->layout, NULL, &required_rect);
required_rect.x = required_rect.y = 0;
if (priv->single_line_mode || priv->wrap)
required_rect.height = get_single_line_height (GTK_WIDGET (label), priv->layout);
natural_rect = required_rect;
/* Calculate text width itself based on GtkLabel property rules */
get_label_width (label, &required_rect.width, &natural_rect.width);
/* Now that we have minimum and natural sizes in pango extents, apply a possible transform */
if (priv->have_transform)
{
PangoLayout *layout = pango_layout_copy (priv->layout);
PangoContext *context = pango_layout_get_context (priv->layout);
const PangoMatrix *matrix = pango_context_get_matrix (context);
pango_layout_set_width (layout, -1);
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_NONE);
pango_layout_get_extents (layout, NULL, &natural_rect);
g_object_unref (layout);
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;
}
/* Restore real allocated size of layout; sometimes size-requests
* are randomly called without a following allocation; for this case
* we need to make sure we dont have a mucked up layout because we
* went and guessed the wrap-size.
*/
if (priv->wrap)
gtk_label_clear_layout (label);
gtk_label_ensure_layout (label, FALSE);
}
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);
/* The layout may have been recently cleared in get_size_for_orientation(),
* but the width at that point may not be the same as the allocated width
*/
if (priv->wrap)
gtk_label_clear_layout (label);
gtk_label_ensure_layout (label, FALSE);
if (priv->ellipsize)
{
if (priv->layout)
{
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);
}
}
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)
{
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);
/* 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, FALSE);
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, FALSE);
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;
GdkWindow *window;
gint x, y;
gtk_label_ensure_layout (label, FALSE);
if (priv->text && (*priv->text != '\0'))
{
GdkRGBA *bg_color, *fg_color;
get_layout_location (label, &x, &y);
context = gtk_widget_get_style_context (widget);
window = gtk_widget_get_window (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;
GtkStateType state;
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, FALSE);
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);
else
gtk_drag_set_icon_default (context);
if (surface)
g_object_unref (surface);
}
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: 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)
{
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, FALSE);
return priv->layout;
}
/**
* gtk_label_get_layout_offsets:
* @label: a #GtkLabel
* @x: (allow-none): location to store X offset of layout, or %NULL
* @y: (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, FALSE);
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 <link
* linkend="PangoMarkupFormat">Pango's text markup
* language</link>. 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 <link linkend="PangoMarkupFormat">Pango text markup
* language</link>. 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, FALSE);
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, FALSE);
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, FALSE);
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, FALSE);
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, FALSE);
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);
}
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