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gtk2/gtk/gtklabel.c
Michael Natterer 17fed85c24 add new boolean settings gtk-enable-accels and gtk-enable-mnemonics which 
2007-02-05  Michael Natterer  <mitch@imendio.com>

	* gtk/gtksettings.c: add new boolean settings gtk-enable-accels
	and gtk-enable-mnemonics which enable/disable accelerators and
	mnemonics (bug #72375, based on a patch from Tommi Komulainen).

	* gtk/gtkwindow.c (gtk_window_activate_key)
	* gtk/gtkmenushell.c (gtk_menu_shell_key_press): don't invoke them
	if the resp. setting is FALSE.

	* gtk/gtkaccellabel.c (gtk_accel_label_refetch)
	* gtk/gtklabel.c (gtk_label_set_pattern_internal): don't display
	them if the setting is FALSE.

	* gtk/gtklabel.c: added signal connection to the screen's settings
	object and traverse all widgets on the screen when the setting
	changes. It's slightly ugly to also update GtkAccelLabels here,
	but less ugly than connecting and traversing all widgets twice.


svn path=/trunk/; revision=17262
2007-02-05 14:11:39 +00:00

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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 "gtkwindow.h"
#include "gdk/gdkkeysyms.h"
#include "gtkclipboard.h"
#include <pango/pango.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 "gtkprivate.h"
#include "gtkalias.h"
#define GTK_LABEL_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_LABEL, GtkLabelPrivate))
typedef struct
{
gint wrap_width;
gint width_chars;
gint max_width_chars;
}
GtkLabelPrivate;
struct _GtkLabelSelectionInfo
{
GdkWindow *window;
gint selection_anchor;
gint selection_end;
GtkWidget *popup_menu;
gint drag_start_x;
gint drag_start_y;
guint in_drag : 1;
};
enum {
MOVE_CURSOR,
COPY_CLIPBOARD,
POPULATE_POPUP,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_LABEL,
PROP_ATTRIBUTES,
PROP_USE_MARKUP,
PROP_USE_UNDERLINE,
PROP_JUSTIFY,
PROP_PATTERN,
PROP_WRAP,
PROP_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
};
static guint signals[LAST_SIGNAL] = { 0 };
static void gtk_label_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_label_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_label_destroy (GtkObject *object);
static void gtk_label_finalize (GObject *object);
static void gtk_label_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_label_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_label_state_changed (GtkWidget *widget,
GtkStateType state);
static void gtk_label_style_set (GtkWidget *widget,
GtkStyle *previous_style);
static void gtk_label_direction_changed (GtkWidget *widget,
GtkTextDirection previous_dir);
static gint gtk_label_expose (GtkWidget *widget,
GdkEventExpose *event);
static void gtk_label_realize (GtkWidget *widget);
static void gtk_label_unrealize (GtkWidget *widget);
static void gtk_label_map (GtkWidget *widget);
static void gtk_label_unmap (GtkWidget *widget);
static gboolean gtk_label_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_label_button_release (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_label_motion (GtkWidget *widget,
GdkEventMotion *event);
static void gtk_label_grab_focus (GtkWidget *widget);
static void gtk_label_set_text_internal (GtkLabel *label,
gchar *str);
static void gtk_label_set_label_internal (GtkLabel *label,
gchar *str);
static void gtk_label_set_use_markup_internal (GtkLabel *label,
gboolean val);
static void gtk_label_set_use_underline_internal (GtkLabel *label,
gboolean val);
static void gtk_label_set_attributes_internal (GtkLabel *label,
PangoAttrList *attrs);
static void gtk_label_set_uline_text_internal (GtkLabel *label,
const gchar *str);
static void gtk_label_set_pattern_internal (GtkLabel *label,
const gchar *pattern);
static void set_markup (GtkLabel *label,
const gchar *str,
gboolean with_uline);
static void gtk_label_recalculate (GtkLabel *label);
static void gtk_label_hierarchy_changed (GtkWidget *widget,
GtkWidget *old_toplevel);
static void gtk_label_screen_changed (GtkWidget *widget,
GdkScreen *old_screen);
static void gtk_label_create_window (GtkLabel *label);
static void gtk_label_destroy_window (GtkLabel *label);
static void gtk_label_clear_layout (GtkLabel *label);
static void gtk_label_ensure_layout (GtkLabel *label);
static void gtk_label_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);
/* For selectable lables: */
static void gtk_label_move_cursor (GtkLabel *label,
GtkMovementStep step,
gint count,
gboolean extend_selection);
static void gtk_label_copy_clipboard (GtkLabel *label);
static void gtk_label_select_all (GtkLabel *label);
static void gtk_label_do_popup (GtkLabel *label,
GdkEventButton *event);
static gint gtk_label_move_forward_word (GtkLabel *label,
gint start);
static gint gtk_label_move_backward_word (GtkLabel *label,
gint start);
static GQuark quark_angle = 0;
G_DEFINE_TYPE (GtkLabel, gtk_label, GTK_TYPE_MISC)
static void
add_move_binding (GtkBindingSet *binding_set,
guint keyval,
guint modmask,
GtkMovementStep step,
gint count)
{
g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
gtk_binding_entry_add_signal (binding_set, keyval, modmask,
"move_cursor", 3,
G_TYPE_ENUM, step,
G_TYPE_INT, count,
G_TYPE_BOOLEAN, FALSE);
/* Selection-extending version */
gtk_binding_entry_add_signal (binding_set, keyval, modmask | GDK_SHIFT_MASK,
"move_cursor", 3,
G_TYPE_ENUM, step,
G_TYPE_INT, count,
G_TYPE_BOOLEAN, TRUE);
}
static void
gtk_label_class_init (GtkLabelClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkObjectClass *object_class = GTK_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkBindingSet *binding_set;
quark_angle = g_quark_from_static_string ("angle");
gobject_class->set_property = gtk_label_set_property;
gobject_class->get_property = gtk_label_get_property;
gobject_class->finalize = gtk_label_finalize;
object_class->destroy = gtk_label_destroy;
widget_class->size_request = gtk_label_size_request;
widget_class->size_allocate = gtk_label_size_allocate;
widget_class->state_changed = gtk_label_state_changed;
widget_class->style_set = gtk_label_style_set;
widget_class->direction_changed = gtk_label_direction_changed;
widget_class->expose_event = gtk_label_expose;
widget_class->realize = gtk_label_realize;
widget_class->unrealize = gtk_label_unrealize;
widget_class->map = gtk_label_map;
widget_class->unmap = gtk_label_unmap;
widget_class->button_press_event = gtk_label_button_press;
widget_class->button_release_event = gtk_label_button_release;
widget_class->motion_notify_event = gtk_label_motion;
widget_class->hierarchy_changed = gtk_label_hierarchy_changed;
widget_class->screen_changed = gtk_label_screen_changed;
widget_class->mnemonic_activate = gtk_label_mnemonic_activate;
widget_class->drag_data_get = gtk_label_drag_data_get;
widget_class->grab_focus = gtk_label_grab_focus;
class->move_cursor = gtk_label_move_cursor;
class->copy_clipboard = gtk_label_copy_clipboard;
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);
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);
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);
g_object_class_install_property (gobject_class,
PROP_LABEL,
g_param_spec_string ("label",
P_("Label"),
P_("The text of the label"),
NULL,
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 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_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 don't
* work well in notebook tabs, unless the tab's ::tab-expand property is set
* to %TRUE. Other means 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, otherwise the label will
* request either 3 characters or the property value, whichever is greater.
* If the width-chars property is set to a positive value, then the
* max-width-chars property is ignored.
*
* 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, otherwise the
* label will request space for no more than the requested number of
* characters. If the width-chars property is set to a positive value,
* then the max-width-chars property is ignored.
*
* 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));
/*
* Key bindings
*/
binding_set = gtk_binding_set_by_class (class);
/* Moving the insertion point */
add_move_binding (binding_set, GDK_Right, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, 1);
add_move_binding (binding_set, GDK_Left, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, -1);
add_move_binding (binding_set, GDK_KP_Right, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, 1);
add_move_binding (binding_set, GDK_KP_Left, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, -1);
add_move_binding (binding_set, GDK_f, GDK_CONTROL_MASK,
GTK_MOVEMENT_LOGICAL_POSITIONS, 1);
add_move_binding (binding_set, GDK_b, GDK_CONTROL_MASK,
GTK_MOVEMENT_LOGICAL_POSITIONS, -1);
add_move_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, 1);
add_move_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, -1);
add_move_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, 1);
add_move_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, -1);
/* select all */
gtk_binding_entry_add_signal (binding_set, GDK_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_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_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_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_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_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_f, GDK_MOD1_MASK,
GTK_MOVEMENT_WORDS, 1);
add_move_binding (binding_set, GDK_b, GDK_MOD1_MASK,
GTK_MOVEMENT_WORDS, -1);
add_move_binding (binding_set, GDK_Home, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
add_move_binding (binding_set, GDK_End, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
add_move_binding (binding_set, GDK_KP_Home, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
add_move_binding (binding_set, GDK_KP_End, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
add_move_binding (binding_set, GDK_Home, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, -1);
add_move_binding (binding_set, GDK_End, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, 1);
add_move_binding (binding_set, GDK_KP_Home, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, -1);
add_move_binding (binding_set, GDK_KP_End, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, 1);
/* copy */
gtk_binding_entry_add_signal (binding_set, GDK_c, GDK_CONTROL_MASK,
"copy_clipboard", 0);
gtk_settings_install_property (g_param_spec_boolean ("gtk-label-select-on-focus",
P_("Select on focus"),
P_("Whether to select the contents of a selectable label when it is focused"),
TRUE,
GTK_PARAM_READWRITE));
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;
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;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_label_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkLabel *label;
label = GTK_LABEL (object);
switch (prop_id)
{
case PROP_LABEL:
g_value_set_string (value, label->label);
break;
case PROP_ATTRIBUTES:
g_value_set_boxed (value, label->attrs);
break;
case PROP_USE_MARKUP:
g_value_set_boolean (value, label->use_markup);
break;
case PROP_USE_UNDERLINE:
g_value_set_boolean (value, label->use_underline);
break;
case PROP_JUSTIFY:
g_value_set_enum (value, label->jtype);
break;
case PROP_WRAP:
g_value_set_boolean (value, label->wrap);
break;
case PROP_WRAP_MODE:
g_value_set_enum (value, label->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, label->mnemonic_keyval);
break;
case PROP_MNEMONIC_WIDGET:
g_value_set_object (value, (GObject*) label->mnemonic_widget);
break;
case PROP_CURSOR_POSITION:
if (label->select_info)
{
gint offset = g_utf8_pointer_to_offset (label->text,
label->text + label->select_info->selection_end);
g_value_set_int (value, offset);
}
else
g_value_set_int (value, 0);
break;
case PROP_SELECTION_BOUND:
if (label->select_info)
{
gint offset = g_utf8_pointer_to_offset (label->text,
label->text + label->select_info->selection_anchor);
g_value_set_int (value, offset);
}
else
g_value_set_int (value, 0);
break;
case PROP_ELLIPSIZE:
g_value_set_enum (value, label->ellipsize);
break;
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;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_label_init (GtkLabel *label)
{
GtkLabelPrivate *priv;
GTK_WIDGET_SET_FLAGS (label, GTK_NO_WINDOW);
priv = GTK_LABEL_GET_PRIVATE (label);
priv->width_chars = -1;
priv->max_width_chars = -1;
priv->wrap_width = -1;
label->label = NULL;
label->jtype = GTK_JUSTIFY_LEFT;
label->wrap = FALSE;
label->wrap_mode = PANGO_WRAP_WORD;
label->ellipsize = PANGO_ELLIPSIZE_NONE;
label->use_underline = FALSE;
label->use_markup = FALSE;
label->mnemonic_keyval = GDK_VoidSymbol;
label->layout = NULL;
label->text = NULL;
label->attrs = NULL;
label->mnemonic_widget = NULL;
label->mnemonic_window = NULL;
gtk_label_set_text (label, "");
}
/**
* gtk_label_new:
* @str: The text of the label
*
* Creates a new label with the given text inside it. You can
* pass %NULL to get an empty label widget.
*
* Return value: the new #GtkLabel
**/
GtkWidget*
gtk_label_new (const gchar *str)
{
GtkLabel *label;
label = g_object_new (GTK_TYPE_LABEL, NULL);
if (str && *str)
gtk_label_set_text (label, str);
return GTK_WIDGET (label);
}
/**
* gtk_label_new_with_mnemonic:
* @str: The text of the label, with an underscore in front of the
* mnemonic character
*
* Creates a new #GtkLabel, containing the text in @str.
*
* If characters in @str are preceded by an underscore, they are
* underlined. If you need a literal underscore character in a label, use
* '__' (two underscores). The first underlined character represents a
* keyboard accelerator called a mnemonic. The mnemonic key can be used
* to activate another widget, chosen automatically, or explicitly using
* gtk_label_set_mnemonic_widget().
*
* If gtk_label_set_mnemonic_widget()
* is not called, then the first activatable ancestor of the #GtkLabel
* will be chosen as the mnemonic widget. For instance, if the
* label is inside a button or menu item, the button or menu item will
* automatically become the mnemonic widget and be activated by
* the mnemonic.
*
* Return value: the new #GtkLabel
**/
GtkWidget*
gtk_label_new_with_mnemonic (const gchar *str)
{
GtkLabel *label;
label = g_object_new (GTK_TYPE_LABEL, NULL);
if (str && *str)
gtk_label_set_text_with_mnemonic (label, str);
return GTK_WIDGET (label);
}
static gboolean
gtk_label_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling)
{
GtkWidget *parent;
if (GTK_LABEL (widget)->mnemonic_widget)
return gtk_widget_mnemonic_activate (GTK_LABEL (widget)->mnemonic_widget, group_cycling);
/* Try to find the widget to activate by traversing the
* widget's ancestry.
*/
parent = widget->parent;
if (parent && GTK_IS_NOTEBOOK (parent))
return FALSE;
while (parent)
{
if (GTK_WIDGET_CAN_FOCUS (parent) ||
(!group_cycling && GTK_WIDGET_GET_CLASS (parent)->activate_signal) ||
(parent->parent && GTK_IS_NOTEBOOK (parent->parent)) ||
(GTK_IS_MENU_ITEM (parent)))
return gtk_widget_mnemonic_activate (parent, group_cycling);
parent = parent->parent;
}
/* barf if there was nothing to activate */
g_warning ("Couldn't find a target for a mnemonic activation.");
gtk_widget_error_bell (widget);
return FALSE;
}
static void
gtk_label_setup_mnemonic (GtkLabel *label,
guint last_key)
{
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_VoidSymbol)
{
if (label->mnemonic_window)
{
gtk_window_remove_mnemonic (label->mnemonic_window,
last_key,
widget);
label->mnemonic_window = NULL;
}
if (mnemonic_menu)
{
_gtk_menu_shell_remove_mnemonic (GTK_MENU_SHELL (mnemonic_menu),
last_key,
widget);
mnemonic_menu = NULL;
}
}
if (label->mnemonic_keyval == GDK_VoidSymbol)
goto done;
toplevel = gtk_widget_get_toplevel (widget);
if (GTK_WIDGET_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),
label->mnemonic_keyval,
widget);
mnemonic_menu = menu_shell;
}
if (!(menu_shell && GTK_IS_MENU (menu_shell)))
{
gtk_window_add_mnemonic (GTK_WINDOW (toplevel),
label->mnemonic_keyval,
widget);
label->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);
gtk_label_setup_mnemonic (label, label->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
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;
label->mnemonic_widget = NULL;
g_object_notify (G_OBJECT (label), "mnemonic-widget");
}
/**
* gtk_label_set_mnemonic_widget:
* @label: a #GtkLabel
* @widget: the target #GtkWidget
*
* If the label has been set so that it has an mnemonic key (using
* i.e. gtk_label_set_markup_with_mnemonic(),
* gtk_label_set_text_with_mnemonic(), gtk_label_new_with_mnemonic()
* or the "use_underline" property) the label can be associated with a
* widget that is the target of the mnemonic. When the label is inside
* a widget (like a #GtkButton or a #GtkNotebook tab) it is
* automatically associated with the correct widget, but sometimes
* (i.e. when the target is a #GtkEntry next to the label) you need to
* set it explicitly using this function.
*
* The target widget will be accelerated by emitting "mnemonic_activate" on it.
* The default handler for this signal will activate the widget if there are no
* mnemonic collisions and toggle focus between the colliding widgets otherwise.
**/
void
gtk_label_set_mnemonic_widget (GtkLabel *label,
GtkWidget *widget)
{
g_return_if_fail (GTK_IS_LABEL (label));
if (widget)
g_return_if_fail (GTK_IS_WIDGET (widget));
if (label->mnemonic_widget)
{
gtk_widget_remove_mnemonic_label (label->mnemonic_widget, GTK_WIDGET (label));
g_object_weak_unref (G_OBJECT (label->mnemonic_widget),
label_mnemonic_widget_weak_notify,
label);
}
label->mnemonic_widget = widget;
if (label->mnemonic_widget)
{
g_object_weak_ref (G_OBJECT (label->mnemonic_widget),
label_mnemonic_widget_weak_notify,
label);
gtk_widget_add_mnemonic_label (label->mnemonic_widget, GTK_WIDGET (label));
}
g_object_notify (G_OBJECT (label), "mnemonic-widget");
}
/**
* gtk_label_get_mnemonic_widget:
* @label: a #GtkLabel
*
* Retrieves the target of the mnemonic (keyboard shortcut) of this
* label. See gtk_label_set_mnemonic_widget ().
*
* Return value: the target of the label's mnemonic, or %NULL if none
* has been set and the default algorithm will be used.
**/
GtkWidget *
gtk_label_get_mnemonic_widget (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), NULL);
return label->mnemonic_widget;
}
/**
* gtk_label_get_mnemonic_keyval:
* @label: a #GtkLabel
*
* If the label has been set so that it has an mnemonic key this function
* returns the keyval used for the mnemonic accelerator. If there is no
* mnemonic set up it returns #GDK_VoidSymbol.
*
* Returns: GDK keyval usable for accelerators, or #GDK_VoidSymbol
**/
guint
gtk_label_get_mnemonic_keyval (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), GDK_VoidSymbol);
return label->mnemonic_keyval;
}
static void
gtk_label_set_text_internal (GtkLabel *label,
gchar *str)
{
g_free (label->text);
label->text = str;
gtk_label_select_region_index (label, 0, 0);
}
static void
gtk_label_set_label_internal (GtkLabel *label,
gchar *str)
{
g_free (label->label);
label->label = str;
g_object_notify (G_OBJECT (label), "label");
}
static void
gtk_label_set_use_markup_internal (GtkLabel *label,
gboolean val)
{
val = val != FALSE;
if (label->use_markup != val)
{
label->use_markup = val;
g_object_notify (G_OBJECT (label), "use-markup");
}
}
static void
gtk_label_set_use_underline_internal (GtkLabel *label,
gboolean val)
{
val = val != FALSE;
if (label->use_underline != val)
{
label->use_underline = val;
g_object_notify (G_OBJECT (label), "use-underline");
}
}
static void
gtk_label_set_attributes_internal (GtkLabel *label,
PangoAttrList *attrs)
{
if (attrs)
pango_attr_list_ref (attrs);
if (label->attrs)
pango_attr_list_unref (label->attrs);
if (!label->use_markup && !label->use_underline)
{
if (attrs)
pango_attr_list_ref (attrs);
if (label->effective_attrs)
pango_attr_list_unref (label->effective_attrs);
label->effective_attrs = attrs;
}
label->attrs = attrs;
g_object_notify (G_OBJECT (label), "attributes");
}
/* Calculates text, attrs and mnemonic_keyval from
* label, use_underline and use_markup
*/
static void
gtk_label_recalculate (GtkLabel *label)
{
if (label->use_markup)
set_markup (label, label->label, label->use_underline);
else
{
if (label->use_underline)
gtk_label_set_uline_text_internal (label, label->label);
else
{
gtk_label_set_text_internal (label, g_strdup (label->label));
if (label->attrs)
pango_attr_list_ref (label->attrs);
if (label->effective_attrs)
pango_attr_list_unref (label->effective_attrs);
label->effective_attrs = label->attrs;
}
}
if (!label->use_underline)
{
guint keyval = label->mnemonic_keyval;
label->mnemonic_keyval = GDK_VoidSymbol;
gtk_label_setup_mnemonic (label, keyval);
}
gtk_label_clear_layout (label);
gtk_widget_queue_resize (GTK_WIDGET (label));
}
/**
* gtk_label_set_text:
* @label: a #GtkLabel
* @str: The text you want to set.
*
* Sets the text within the #GtkLabel widget. It overwrites any text that
* was there before.
*
* This will also clear any previously set mnemonic accelerators.
**/
void
gtk_label_set_text (GtkLabel *label,
const gchar *str)
{
g_return_if_fail (GTK_IS_LABEL (label));
g_object_freeze_notify (G_OBJECT (label));
gtk_label_set_label_internal (label, g_strdup (str ? str : ""));
gtk_label_set_use_markup_internal (label, FALSE);
gtk_label_set_use_underline_internal (label, FALSE);
gtk_label_recalculate (label);
g_object_thaw_notify (G_OBJECT (label));
}
/**
* gtk_label_set_attributes:
* @label: a #GtkLabel
* @attrs: a #PangoAttrList
*
* Sets a #PangoAttrList; the attributes in the list are applied to the
* label text. The attributes set with this function will be ignored
* if the "use_underline" property or the "use_markup" property
* is %TRUE.
**/
void
gtk_label_set_attributes (GtkLabel *label,
PangoAttrList *attrs)
{
g_return_if_fail (GTK_IS_LABEL (label));
gtk_label_set_attributes_internal (label, attrs);
gtk_label_clear_layout (label);
gtk_widget_queue_resize (GTK_WIDGET (label));
}
/**
* gtk_label_get_attributes:
* @label: a #GtkLabel
*
* Gets the attribute list that was set on the label using
* gtk_label_set_attributes(), if any. This function does
* not reflect attributes that come from the labels markup
* (see gtk_label_set_markup()). If you want to get the
* effective attributes for the label, use
* pango_layout_get_attribute (gtk_label_get_layout (label)).
*
* Return value: the attribute list, or %NULL if none was set.
**/
PangoAttrList *
gtk_label_get_attributes (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), NULL);
return label->attrs;
}
/**
* gtk_label_set_label:
* @label: a #GtkLabel
* @str: the new text to set for the label
*
* Sets the text of the label. The label is interpreted as
* including embedded underlines and/or Pango markup depending
* on the values of label->use_underline and label->use_markup.
**/
void
gtk_label_set_label (GtkLabel *label,
const gchar *str)
{
guint last_keyval;
g_return_if_fail (GTK_IS_LABEL (label));
g_return_if_fail (str != NULL);
last_keyval = label->mnemonic_keyval;
gtk_label_set_label_internal (label, g_strdup (str));
gtk_label_recalculate (label);
if (last_keyval != label->mnemonic_keyval)
gtk_label_setup_mnemonic (label, last_keyval);
}
/**
* gtk_label_get_label:
* @label: a #GtkLabel
*
* Fetches the text from a label widget including any embedded
* underlines indicating mnemonics and Pango markup. (See
* gtk_label_get_text ()).
*
* Return value: the text of the label widget. This string is
* owned by the widget and must not be modified or freed.
**/
G_CONST_RETURN gchar *
gtk_label_get_label (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), NULL);
return label->label;
}
static void
set_markup (GtkLabel *label,
const gchar *str,
gboolean with_uline)
{
gchar *text = NULL;
GError *error = NULL;
PangoAttrList *attrs = NULL;
gunichar accel_char = 0;
if (!pango_parse_markup (str,
-1,
with_uline ? '_' : 0,
&attrs,
&text,
with_uline ? &accel_char : NULL,
&error))
{
g_warning ("Failed to set text from markup due to error parsing markup: %s",
error->message);
g_error_free (error);
return;
}
if (text)
gtk_label_set_text_internal (label, text);
if (attrs)
{
if (label->effective_attrs)
pango_attr_list_unref (label->effective_attrs);
label->effective_attrs = attrs;
}
if (accel_char != 0)
label->mnemonic_keyval = gdk_keyval_to_lower (gdk_unicode_to_keyval (accel_char));
else
label->mnemonic_keyval = GDK_VoidSymbol;
}
/**
* gtk_label_set_markup:
* @label: a #GtkLabel
* @str: a markup string (see <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()<!-- -->:
* <informalexample><programlisting>
* 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);
* </programlisting></informalexample>
**/
void
gtk_label_set_markup (GtkLabel *label,
const gchar *str)
{
g_return_if_fail (GTK_IS_LABEL (label));
g_object_freeze_notify (G_OBJECT (label));
gtk_label_set_label_internal (label, g_strdup (str ? str : ""));
gtk_label_set_use_markup_internal (label, TRUE);
gtk_label_set_use_underline_internal (label, FALSE);
gtk_label_recalculate (label);
g_object_thaw_notify (G_OBJECT (label));
}
/**
* gtk_label_set_markup_with_mnemonic:
* @label: a #GtkLabel
* @str: a markup string (see <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)
{
guint last_keyval;
g_return_if_fail (GTK_IS_LABEL (label));
g_object_freeze_notify (G_OBJECT (label));
last_keyval = label->mnemonic_keyval;
gtk_label_set_label_internal (label, g_strdup (str ? str : ""));
gtk_label_set_use_markup_internal (label, TRUE);
gtk_label_set_use_underline_internal (label, TRUE);
gtk_label_recalculate (label);
gtk_label_setup_mnemonic (label, last_keyval);
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->text;
}
static PangoAttrList *
gtk_label_pattern_to_attrs (GtkLabel *label,
const gchar *pattern)
{
const char *start;
const char *p = label->text;
const char *q = pattern;
PangoAttrList *attrs;
attrs = pango_attr_list_new ();
while (1)
{
while (*p && *q && *q != '_')
{
p = g_utf8_next_char (p);
q++;
}
start = p;
while (*p && *q && *q == '_')
{
p = g_utf8_next_char (p);
q++;
}
if (p > start)
{
PangoAttribute *attr = pango_attr_underline_new (PANGO_UNDERLINE_LOW);
attr->start_index = start - label->text;
attr->end_index = p - label->text;
pango_attr_list_insert (attrs, attr);
}
else
break;
}
return attrs;
}
static void
gtk_label_set_pattern_internal (GtkLabel *label,
const gchar *pattern)
{
PangoAttrList *attrs;
gboolean enable_mnemonics;
g_return_if_fail (GTK_IS_LABEL (label));
g_object_get (gtk_widget_get_settings (GTK_WIDGET (label)),
"gtk-enable-mnemonics", &enable_mnemonics,
NULL);
if (enable_mnemonics && pattern)
attrs = gtk_label_pattern_to_attrs (label, pattern);
else
attrs = NULL;
if (label->effective_attrs)
pango_attr_list_unref (label->effective_attrs);
label->effective_attrs = attrs;
}
void
gtk_label_set_pattern (GtkLabel *label,
const gchar *pattern)
{
g_return_if_fail (GTK_IS_LABEL (label));
gtk_label_set_pattern_internal (label, pattern);
gtk_label_clear_layout (label);
gtk_widget_queue_resize (GTK_WIDGET (label));
}
/**
* gtk_label_set_justify:
* @label: a #GtkLabel
* @jtype: a #GtkJustification
*
* Sets the alignment of the lines in the text of the label relative to
* each other. %GTK_JUSTIFY_LEFT is the default value when the
* widget is first created with gtk_label_new(). If you instead want
* to set the alignment of the label as a whole, use
* gtk_misc_set_alignment() instead. gtk_label_set_justify() has no
* effect on labels containing only a single line.
**/
void
gtk_label_set_justify (GtkLabel *label,
GtkJustification jtype)
{
g_return_if_fail (GTK_IS_LABEL (label));
g_return_if_fail (jtype >= GTK_JUSTIFY_LEFT && jtype <= GTK_JUSTIFY_FILL);
if ((GtkJustification) label->jtype != jtype)
{
label->jtype = jtype;
/* No real need to be this drastic, but easier than duplicating the code */
gtk_label_clear_layout (label);
g_object_notify (G_OBJECT (label), "justify");
gtk_widget_queue_resize (GTK_WIDGET (label));
}
}
/**
* gtk_label_get_justify:
* @label: a #GtkLabel
*
* Returns the justification of the label. See gtk_label_set_justify ().
*
* Return value: #GtkJustification
**/
GtkJustification
gtk_label_get_justify (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), 0);
return label->jtype;
}
/**
* gtk_label_set_ellipsize:
* @label: a #GtkLabel
* @mode: a #PangoEllipsizeMode
*
* Sets the mode used to ellipsize (add an ellipsis: "...") to the text if there
* is not enough space to render the entire string.
*
* Since: 2.6
**/
void
gtk_label_set_ellipsize (GtkLabel *label,
PangoEllipsizeMode mode)
{
g_return_if_fail (GTK_IS_LABEL (label));
g_return_if_fail (mode >= PANGO_ELLIPSIZE_NONE && mode <= PANGO_ELLIPSIZE_END);
if ((PangoEllipsizeMode) label->ellipsize != mode)
{
label->ellipsize = mode;
/* No real need to be this drastic, but easier than duplicating the code */
gtk_label_clear_layout (label);
g_object_notify (G_OBJECT (label), "ellipsize");
gtk_widget_queue_resize (GTK_WIDGET (label));
}
}
/**
* gtk_label_get_ellipsize:
* @label: a #GtkLabel
*
* Returns the ellipsizing position of the label. See gtk_label_set_ellipsize().
*
* Return value: #PangoEllipsizeMode
*
* Since: 2.6
**/
PangoEllipsizeMode
gtk_label_get_ellipsize (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), PANGO_ELLIPSIZE_NONE);
return label->ellipsize;
}
/**
* gtk_label_set_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 = GTK_LABEL_GET_PRIVATE (label);
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 GTK_LABEL_GET_PRIVATE (label)->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 = GTK_LABEL_GET_PRIVATE (label);
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 GTK_LABEL_GET_PRIVATE (label)->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)
{
g_return_if_fail (GTK_IS_LABEL (label));
wrap = wrap != FALSE;
if (label->wrap != wrap)
{
label->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->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)
{
g_return_if_fail (GTK_IS_LABEL (label));
if (label->wrap_mode != wrap_mode)
{
label->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->wrap_mode;
}
void
gtk_label_get (GtkLabel *label,
gchar **str)
{
g_return_if_fail (GTK_IS_LABEL (label));
g_return_if_fail (str != NULL);
*str = label->text;
}
static void
gtk_label_destroy (GtkObject *object)
{
GtkLabel *label = GTK_LABEL (object);
gtk_label_set_mnemonic_widget (label, NULL);
GTK_OBJECT_CLASS (gtk_label_parent_class)->destroy (object);
}
static void
gtk_label_finalize (GObject *object)
{
GtkLabel *label;
g_return_if_fail (GTK_IS_LABEL (object));
label = GTK_LABEL (object);
g_free (label->label);
g_free (label->text);
if (label->layout)
g_object_unref (label->layout);
if (label->attrs)
pango_attr_list_unref (label->attrs);
if (label->effective_attrs)
pango_attr_list_unref (label->effective_attrs);
g_free (label->select_info);
G_OBJECT_CLASS (gtk_label_parent_class)->finalize (object);
}
static void
gtk_label_clear_layout (GtkLabel *label)
{
if (label->layout)
{
g_object_unref (label->layout);
label->layout = NULL;
}
}
static gint
get_label_char_width (GtkLabel *label)
{
GtkLabelPrivate *priv;
PangoContext *context;
PangoFontMetrics *metrics;
gint char_width, digit_width, char_pixels, w;
priv = GTK_LABEL_GET_PRIVATE (label);
context = pango_layout_get_context (label->layout);
metrics = pango_context_get_metrics (context, GTK_WIDGET (label)->style->font_desc,
pango_context_get_language (context));
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);
if (priv->width_chars < 0)
{
PangoRectangle rect;
pango_layout_set_width (label->layout, -1);
pango_layout_get_extents (label->layout, NULL, &rect);
w = char_pixels * MAX (priv->max_width_chars, 3);
w = MIN (rect.width, w);
}
else
{
/* enforce minimum width for ellipsized labels at ~3 chars */
w = char_pixels * MAX (priv->width_chars, 3);
}
return w;
}
static void
gtk_label_invalidate_wrap_width (GtkLabel *label)
{
GtkLabelPrivate *priv;
priv = GTK_LABEL_GET_PRIVATE (label);
priv->wrap_width = -1;
}
static gint
get_label_wrap_width (GtkLabel *label)
{
GtkLabelPrivate *priv;
priv = GTK_LABEL_GET_PRIVATE (label);
if (priv->wrap_width < 0)
{
if (priv->width_chars > 0 || priv->max_width_chars > 0)
priv->wrap_width = get_label_char_width (label);
else
{
PangoLayout *layout;
layout = gtk_widget_create_pango_layout (GTK_WIDGET (label),
"This long string gives a good enough length for any line to have.");
pango_layout_get_size (layout, &priv->wrap_width, NULL);
g_object_unref (layout);
}
}
return priv->wrap_width;
}
static void
gtk_label_ensure_layout (GtkLabel *label)
{
GtkWidget *widget;
PangoRectangle logical_rect;
gboolean rtl;
widget = GTK_WIDGET (label);
rtl = gtk_widget_get_direction(widget) == GTK_TEXT_DIR_RTL;
if (!label->layout)
{
PangoAlignment align = PANGO_ALIGN_LEFT; /* Quiet gcc */
gdouble angle = gtk_label_get_angle (label);
if (angle != 0.0 && !label->wrap && !label->ellipsize && !label->select_info)
{
/* We rotate the standard singleton PangoContext for the widget,
* depending on the fact that it's meant pretty much exclusively
* for our use.
*/
PangoMatrix matrix = PANGO_MATRIX_INIT;
pango_matrix_rotate (&matrix, angle);
pango_context_set_matrix (gtk_widget_get_pango_context (widget), &matrix);
label->have_transform = TRUE;
}
else
{
if (label->have_transform)
pango_context_set_matrix (gtk_widget_get_pango_context (widget), NULL);
label->have_transform = FALSE;
}
label->layout = gtk_widget_create_pango_layout (widget, label->text);
if (label->effective_attrs)
pango_layout_set_attributes (label->layout, label->effective_attrs);
switch (label->jtype)
{
case GTK_JUSTIFY_LEFT:
align = rtl ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
break;
case GTK_JUSTIFY_RIGHT:
align = rtl ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
break;
case GTK_JUSTIFY_CENTER:
align = PANGO_ALIGN_CENTER;
break;
case GTK_JUSTIFY_FILL:
/* FIXME: This just doesn't work to do this */
align = rtl ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
pango_layout_set_justify (label->layout, TRUE);
break;
default:
g_assert_not_reached();
}
pango_layout_set_alignment (label->layout, align);
pango_layout_set_ellipsize (label->layout, label->ellipsize);
pango_layout_set_single_paragraph_mode (label->layout, label->single_line_mode);
if (label->ellipsize)
pango_layout_set_width (label->layout,
widget->allocation.width * PANGO_SCALE);
else if (label->wrap)
{
GtkWidgetAuxInfo *aux_info;
gint longest_paragraph;
gint width, height;
pango_layout_set_wrap (label->layout, label->wrap_mode);
aux_info = _gtk_widget_get_aux_info (widget, FALSE);
if (aux_info && aux_info->width > 0)
pango_layout_set_width (label->layout, aux_info->width * PANGO_SCALE);
else
{
GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (label));
gint wrap_width;
pango_layout_set_width (label->layout, -1);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
width = logical_rect.width;
/* Try to guess a reasonable maximum width */
longest_paragraph = width;
wrap_width = get_label_wrap_width (label);
width = MIN (width, wrap_width);
width = MIN (width,
PANGO_SCALE * (gdk_screen_get_width (screen) + 1) / 2);
pango_layout_set_width (label->layout, width);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
width = logical_rect.width;
height = logical_rect.height;
/* Unfortunately, the above may leave us with a very unbalanced looking paragraph,
* so we try short search for a narrower width that leaves us with the same height
*/
if (longest_paragraph > 0)
{
gint nlines, perfect_width;
nlines = pango_layout_get_line_count (label->layout);
perfect_width = (longest_paragraph + nlines - 1) / nlines;
if (perfect_width < width)
{
pango_layout_set_width (label->layout, perfect_width);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
if (logical_rect.height <= height)
width = logical_rect.width;
else
{
gint mid_width = (perfect_width + width) / 2;
if (mid_width > perfect_width)
{
pango_layout_set_width (label->layout, mid_width);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
if (logical_rect.height <= height)
width = logical_rect.width;
}
}
}
}
pango_layout_set_width (label->layout, width);
}
}
else /* !label->wrap */
pango_layout_set_width (label->layout, -1);
}
}
static void
gtk_label_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkLabel *label;
GtkLabelPrivate *priv;
gint width, height;
PangoRectangle logical_rect;
GtkWidgetAuxInfo *aux_info;
g_return_if_fail (GTK_IS_LABEL (widget));
g_return_if_fail (requisition != NULL);
label = GTK_LABEL (widget);
priv = GTK_LABEL_GET_PRIVATE (widget);
/*
* If word wrapping is on, then the height requisition can depend
* on:
*
* - Any width set on the widget via gtk_widget_set_usize().
* - The padding of the widget (xpad, set by gtk_misc_set_padding)
*
* Instead of trying to detect changes to these quantities, if we
* are wrapping, we just rewrap for each size request. Since
* size requisitions are cached by the GTK+ core, this is not
* expensive.
*/
if (label->wrap)
gtk_label_clear_layout (label);
gtk_label_ensure_layout (label);
width = label->misc.xpad * 2;
height = label->misc.ypad * 2;
aux_info = _gtk_widget_get_aux_info (widget, FALSE);
if (label->have_transform)
{
PangoRectangle rect;
PangoContext *context = pango_layout_get_context (label->layout);
const PangoMatrix *matrix = pango_context_get_matrix (context);
pango_layout_get_extents (label->layout, NULL, &rect);
pango_matrix_transform_rectangle (matrix, &rect);
pango_extents_to_pixels (&rect, NULL);
requisition->width = width + rect.width;
requisition->height = height + rect.height;
return;
}
else
pango_layout_get_extents (label->layout, NULL, &logical_rect);
if ((label->wrap || label->ellipsize ||
priv->width_chars > 0 || priv->max_width_chars > 0) &&
aux_info && aux_info->width > 0)
width += aux_info->width;
else if (label->ellipsize || priv->width_chars > 0 || priv->max_width_chars > 0)
{
width += PANGO_PIXELS (get_label_char_width (label));
}
else
width += PANGO_PIXELS (logical_rect.width);
if (label->single_line_mode)
{
PangoContext *context;
PangoFontMetrics *metrics;
gint ascent, descent;
context = pango_layout_get_context (label->layout);
metrics = pango_context_get_metrics (context, widget->style->font_desc,
pango_context_get_language (context));
ascent = pango_font_metrics_get_ascent (metrics);
descent = pango_font_metrics_get_descent (metrics);
pango_font_metrics_unref (metrics);
height += PANGO_PIXELS (ascent + descent);
}
else
height += PANGO_PIXELS (logical_rect.height);
requisition->width = width;
requisition->height = height;
}
static void
gtk_label_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkLabel *label;
label = GTK_LABEL (widget);
(* GTK_WIDGET_CLASS (gtk_label_parent_class)->size_allocate) (widget, allocation);
if (label->ellipsize)
{
if (label->layout)
{
gint width;
PangoRectangle logical;
width = (allocation->width - label->misc.xpad * 2) * PANGO_SCALE;
pango_layout_set_width (label->layout, -1);
pango_layout_get_extents (label->layout, NULL, &logical);
if (logical.width > width)
pango_layout_set_width (label->layout, width);
}
}
if (label->select_info && label->select_info->window)
{
gdk_window_move_resize (label->select_info->window,
allocation->x,
allocation->y,
allocation->width,
allocation->height);
}
}
static void
gtk_label_state_changed (GtkWidget *widget,
GtkStateType prev_state)
{
GtkLabel *label;
GdkCursor *cursor;
label = GTK_LABEL (widget);
if (label->select_info)
{
gtk_label_select_region (label, 0, 0);
if (GTK_WIDGET_REALIZED (widget))
{
if (GTK_WIDGET_IS_SENSITIVE (widget))
cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget), GDK_XTERM);
else
cursor = NULL;
gdk_window_set_cursor (label->select_info->window, cursor);
if (cursor)
gdk_cursor_unref (cursor);
}
}
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_set (GtkWidget *widget,
GtkStyle *previous_style)
{
GtkLabel *label;
g_return_if_fail (GTK_IS_LABEL (widget));
label = GTK_LABEL (widget);
/* We have to clear the layout, fonts etc. may have changed */
gtk_label_clear_layout (label);
gtk_label_invalidate_wrap_width (label);
}
static void
gtk_label_direction_changed (GtkWidget *widget,
GtkTextDirection previous_dir)
{
GtkLabel *label = GTK_LABEL (widget);
if (label->layout)
pango_layout_context_changed (label->layout);
GTK_WIDGET_CLASS (gtk_label_parent_class)->direction_changed (widget, previous_dir);
}
static void
get_layout_location (GtkLabel *label,
gint *xp,
gint *yp)
{
GtkMisc *misc;
GtkWidget *widget;
GtkLabelPrivate *priv;
gfloat xalign;
gint req_width, x, y;
misc = GTK_MISC (label);
widget = GTK_WIDGET (label);
priv = GTK_LABEL_GET_PRIVATE (label);
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
xalign = misc->xalign;
else
xalign = 1.0 - misc->xalign;
if (label->ellipsize || priv->width_chars > 0)
{
int width;
PangoRectangle logical;
width = pango_layout_get_width (label->layout);
pango_layout_get_pixel_extents (label->layout, NULL, &logical);
req_width = logical.width;
if (width != -1)
req_width = MIN(PANGO_PIXELS (width), req_width);
req_width += 2 * misc->xpad;
}
else
req_width = widget->requisition.width;
x = floor (widget->allocation.x + (gint)misc->xpad +
xalign * (widget->allocation.width - req_width));
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
x = MAX (x, widget->allocation.x + misc->xpad);
else
x = MIN (x, widget->allocation.x + widget->allocation.width - misc->xpad);
y = floor (widget->allocation.y + (gint)misc->ypad
+ MAX (((widget->allocation.height - widget->requisition.height) * misc->yalign),
0));
if (xp)
*xp = x;
if (yp)
*yp = y;
}
static void
draw_insertion_cursor (GtkLabel *label,
GdkRectangle *cursor_location,
gboolean is_primary,
PangoDirection direction,
gboolean draw_arrow)
{
GtkWidget *widget = GTK_WIDGET (label);
GtkTextDirection text_dir;
if (direction == PANGO_DIRECTION_LTR)
text_dir = GTK_TEXT_DIR_LTR;
else
text_dir = GTK_TEXT_DIR_RTL;
gtk_draw_insertion_cursor (widget, widget->window, &(widget->allocation),
cursor_location,
is_primary, text_dir, draw_arrow);
}
static PangoDirection
get_cursor_direction (GtkLabel *label)
{
GSList *l;
g_assert (label->select_info);
gtk_label_ensure_layout (label);
for (l = pango_layout_get_lines_readonly (label->layout); l; l = l->next)
{
PangoLayoutLine *line = l->data;
/* If label->select_info->selection_end is at the very end of
* the line, we don't know if the cursor is on this line or
* the next without looking ahead at the next line. (End
* of paragraph is different from line break.) But it's
* definitely in this paragraph, which is good enough
* to figure out the resolved direction.
*/
if (line->start_index + line->length >= label->select_info->selection_end)
return line->resolved_dir;
}
return PANGO_DIRECTION_LTR;
}
static void
gtk_label_draw_cursor (GtkLabel *label, gint xoffset, gint yoffset)
{
if (label->select_info == NULL)
return;
if (GTK_WIDGET_DRAWABLE (label))
{
GtkWidget *widget = GTK_WIDGET (label);
PangoDirection keymap_direction;
PangoDirection cursor_direction;
PangoRectangle strong_pos, weak_pos;
gboolean split_cursor;
PangoRectangle *cursor1 = NULL;
PangoRectangle *cursor2 = NULL;
GdkRectangle cursor_location;
PangoDirection dir1 = PANGO_DIRECTION_NEUTRAL;
PangoDirection dir2 = PANGO_DIRECTION_NEUTRAL;
keymap_direction = gdk_keymap_get_direction (gdk_keymap_get_for_display (gtk_widget_get_display (widget)));
cursor_direction = get_cursor_direction (label);
gtk_label_ensure_layout (label);
pango_layout_get_cursor_pos (label->layout, label->select_info->selection_end,
&strong_pos, &weak_pos);
g_object_get (gtk_widget_get_settings (widget),
"gtk-split-cursor", &split_cursor,
NULL);
dir1 = cursor_direction;
if (split_cursor)
{
cursor1 = &strong_pos;
if (strong_pos.x != weak_pos.x ||
strong_pos.y != weak_pos.y)
{
dir2 = (cursor_direction == PANGO_DIRECTION_LTR) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR;
cursor2 = &weak_pos;
}
}
else
{
if (keymap_direction == cursor_direction)
cursor1 = &strong_pos;
else
cursor1 = &weak_pos;
}
cursor_location.x = xoffset + PANGO_PIXELS (cursor1->x);
cursor_location.y = yoffset + PANGO_PIXELS (cursor1->y);
cursor_location.width = 0;
cursor_location.height = PANGO_PIXELS (cursor1->height);
draw_insertion_cursor (label,
&cursor_location, TRUE, dir1,
dir2 != PANGO_DIRECTION_NEUTRAL);
if (dir2 != PANGO_DIRECTION_NEUTRAL)
{
cursor_location.x = xoffset + PANGO_PIXELS (cursor2->x);
cursor_location.y = yoffset + PANGO_PIXELS (cursor2->y);
cursor_location.width = 0;
cursor_location.height = PANGO_PIXELS (cursor2->height);
draw_insertion_cursor (label,
&cursor_location, FALSE, dir2,
TRUE);
}
}
}
static gint
gtk_label_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkLabel *label;
gint x, y;
g_return_val_if_fail (GTK_IS_LABEL (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
label = GTK_LABEL (widget);
gtk_label_ensure_layout (label);
if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget) &&
label->text && (*label->text != '\0'))
{
get_layout_location (label, &x, &y);
gtk_paint_layout (widget->style,
widget->window,
GTK_WIDGET_STATE (widget),
FALSE,
&event->area,
widget,
"label",
x, y,
label->layout);
if (label->select_info &&
(label->select_info->selection_anchor !=
label->select_info->selection_end))
{
gint range[2];
GdkRegion *clip;
GtkStateType state;
range[0] = label->select_info->selection_anchor;
range[1] = label->select_info->selection_end;
if (range[0] > range[1])
{
gint tmp = range[0];
range[0] = range[1];
range[1] = tmp;
}
clip = gdk_pango_layout_get_clip_region (label->layout,
x, y,
range,
1);
gdk_region_intersect (clip, event->region);
/* FIXME should use gtk_paint, but it can't use a clip
* region
*/
gdk_gc_set_clip_region (widget->style->black_gc, clip);
state = GTK_STATE_SELECTED;
if (!GTK_WIDGET_HAS_FOCUS (widget))
state = GTK_STATE_ACTIVE;
gdk_draw_layout_with_colors (widget->window,
widget->style->black_gc,
x, y,
label->layout,
&widget->style->text[state],
&widget->style->base[state]);
gdk_gc_set_clip_region (widget->style->black_gc, NULL);
gdk_region_destroy (clip);
}
else if (label->select_info && GTK_WIDGET_HAS_FOCUS (widget))
gtk_label_draw_cursor (label, x, y);
}
return FALSE;
}
static void
gtk_label_set_uline_text_internal (GtkLabel *label,
const gchar *str)
{
guint accel_key = GDK_VoidSymbol;
gchar *new_str;
gchar *pattern;
const gchar *src;
gchar *dest, *pattern_dest;
gboolean underscore;
g_return_if_fail (GTK_IS_LABEL (label));
g_return_if_fail (str != NULL);
/* Split text into the base text and a separate pattern
* of underscores.
*/
new_str = g_new (gchar, strlen (str) + 1);
pattern = g_new (gchar, g_utf8_strlen (str, -1) + 1);
underscore = FALSE;
if (str == NULL)
str = "";
src = str;
dest = new_str;
pattern_dest = pattern;
while (*src)
{
gunichar c;
gchar *next_src;
c = g_utf8_get_char (src);
if (c == (gunichar)-1)
{
g_warning ("Invalid input string");
g_free (new_str);
g_free (pattern);
return;
}
next_src = g_utf8_next_char (src);
if (underscore)
{
if (c == '_')
*pattern_dest++ = ' ';
else
{
*pattern_dest++ = '_';
if (accel_key == GDK_VoidSymbol)
accel_key = gdk_keyval_to_lower (gdk_unicode_to_keyval (c));
}
while (src < next_src)
*dest++ = *src++;
underscore = FALSE;
}
else
{
if (c == '_')
{
underscore = TRUE;
src = next_src;
}
else
{
while (src < next_src)
*dest++ = *src++;
*pattern_dest++ = ' ';
}
}
}
*dest = 0;
*pattern_dest = 0;
gtk_label_set_text_internal (label, new_str);
gtk_label_set_pattern_internal (label, pattern);
g_free (pattern);
label->mnemonic_keyval = accel_key;
}
guint
gtk_label_parse_uline (GtkLabel *label,
const gchar *str)
{
guint keyval;
guint orig_keyval;
g_return_val_if_fail (GTK_IS_LABEL (label), GDK_VoidSymbol);
g_return_val_if_fail (str != NULL, GDK_VoidSymbol);
orig_keyval = label->mnemonic_keyval;
g_object_freeze_notify (G_OBJECT (label));
gtk_label_set_label_internal (label, g_strdup (str ? str : ""));
gtk_label_set_use_markup_internal (label, FALSE);
gtk_label_set_use_underline_internal (label, TRUE);
gtk_label_recalculate (label);
keyval = label->mnemonic_keyval;
label->mnemonic_keyval = GDK_VoidSymbol;
gtk_label_setup_mnemonic (label, orig_keyval);
g_object_thaw_notify (G_OBJECT (label));
return keyval;
}
/**
* gtk_label_set_text_with_mnemonic:
* @label: a #GtkLabel
* @str: a string
*
* Sets the label's text from the string @str.
* If characters in @str are preceded by an underscore, they are underlined
* indicating that they represent a keyboard accelerator called a mnemonic.
* The mnemonic key can be used to activate another widget, chosen automatically,
* or explicitly using gtk_label_set_mnemonic_widget().
**/
void
gtk_label_set_text_with_mnemonic (GtkLabel *label,
const gchar *str)
{
guint last_keyval;
g_return_if_fail (GTK_IS_LABEL (label));
g_return_if_fail (str != NULL);
last_keyval = label->mnemonic_keyval;
g_object_freeze_notify (G_OBJECT (label));
gtk_label_set_label_internal (label, g_strdup (str ? str : ""));
gtk_label_set_use_markup_internal (label, FALSE);
gtk_label_set_use_underline_internal (label, TRUE);
gtk_label_recalculate (label);
gtk_label_setup_mnemonic (label, last_keyval);
g_object_thaw_notify (G_OBJECT (label));
}
static void
gtk_label_realize (GtkWidget *widget)
{
GtkLabel *label;
label = GTK_LABEL (widget);
(* GTK_WIDGET_CLASS (gtk_label_parent_class)->realize) (widget);
if (label->select_info)
gtk_label_create_window (label);
}
static void
gtk_label_unrealize (GtkWidget *widget)
{
GtkLabel *label;
label = GTK_LABEL (widget);
if (label->select_info)
gtk_label_destroy_window (label);
(* GTK_WIDGET_CLASS (gtk_label_parent_class)->unrealize) (widget);
}
static void
gtk_label_map (GtkWidget *widget)
{
GtkLabel *label;
label = GTK_LABEL (widget);
(* GTK_WIDGET_CLASS (gtk_label_parent_class)->map) (widget);
if (label->select_info)
gdk_window_show (label->select_info->window);
}
static void
gtk_label_unmap (GtkWidget *widget)
{
GtkLabel *label;
label = GTK_LABEL (widget);
if (label->select_info)
gdk_window_hide (label->select_info->window);
(* GTK_WIDGET_CLASS (gtk_label_parent_class)->unmap) (widget);
}
static void
window_to_layout_coords (GtkLabel *label,
gint *x,
gint *y)
{
gint lx, ly;
GtkWidget *widget;
widget = GTK_WIDGET (label);
/* get layout location in widget->window coords */
get_layout_location (label, &lx, &ly);
if (x)
{
*x += widget->allocation.x; /* go to widget->window */
*x -= lx; /* go to layout */
}
if (y)
{
*y += widget->allocation.y; /* go to widget->window */
*y -= ly; /* go to layout */
}
}
#if 0
static void
layout_to_window_coords (GtkLabel *label,
gint *x,
gint *y)
{
gint lx, ly;
GtkWidget *widget;
widget = GTK_WIDGET (label);
/* get layout location in widget->window coords */
get_layout_location (label, &lx, &ly);
if (x)
{
*x += lx; /* go to widget->window */
*x -= widget->allocation.x; /* go to selection window */
}
if (y)
{
*y += ly; /* go to widget->window */
*y -= widget->allocation.y; /* go to selection window */
}
}
#endif
static void
get_layout_index (GtkLabel *label,
gint x,
gint y,
gint *index)
{
gint trailing = 0;
const gchar *cluster;
const gchar *cluster_end;
*index = 0;
gtk_label_ensure_layout (label);
window_to_layout_coords (label, &x, &y);
x *= PANGO_SCALE;
y *= PANGO_SCALE;
pango_layout_xy_to_index (label->layout,
x, y,
index, &trailing);
cluster = label->text + *index;
cluster_end = cluster;
while (trailing)
{
cluster_end = g_utf8_next_char (cluster_end);
--trailing;
}
*index += (cluster_end - cluster);
}
static void
gtk_label_select_word (GtkLabel *label)
{
gint min, max;
gint start_index = gtk_label_move_backward_word (label, label->select_info->selection_end);
gint end_index = gtk_label_move_forward_word (label, label->select_info->selection_end);
min = MIN (label->select_info->selection_anchor,
label->select_info->selection_end);
max = MAX (label->select_info->selection_anchor,
label->select_info->selection_end);
min = MIN (min, start_index);
max = MAX (max, end_index);
gtk_label_select_region_index (label, min, max);
}
static void
gtk_label_grab_focus (GtkWidget *widget)
{
GtkLabel *label;
gboolean select_on_focus;
label = GTK_LABEL (widget);
if (label->select_info == NULL)
return;
GTK_WIDGET_CLASS (gtk_label_parent_class)->grab_focus (widget);
g_object_get (gtk_widget_get_settings (widget),
"gtk-label-select-on-focus",
&select_on_focus,
NULL);
if (select_on_focus && !label->in_click)
gtk_label_select_region (label, 0, -1);
}
static gboolean
gtk_label_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkLabel *label;
gint index = 0;
gint min, max;
label = GTK_LABEL (widget);
if (label->select_info == NULL)
return FALSE;
label->select_info->in_drag = FALSE;
if (event->button == 1)
{
if (!GTK_WIDGET_HAS_FOCUS (widget))
{
label->in_click = TRUE;
gtk_widget_grab_focus (widget);
label->in_click = FALSE;
}
if (event->type == GDK_3BUTTON_PRESS)
{
gtk_label_select_region_index (label, 0, strlen (label->text));
return TRUE;
}
if (event->type == GDK_2BUTTON_PRESS)
{
gtk_label_select_word (label);
return TRUE;
}
get_layout_index (label, event->x, event->y, &index);
min = MIN (label->select_info->selection_anchor,
label->select_info->selection_end);
max = MAX (label->select_info->selection_anchor,
label->select_info->selection_end);
if ((label->select_info->selection_anchor !=
label->select_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 (label->text));
else if (event->type == GDK_2BUTTON_PRESS)
gtk_label_select_word (label);
else if (min < max && min <= index && index <= max)
{
label->select_info->in_drag = TRUE;
label->select_info->drag_start_x = event->x;
label->select_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);
gint index;
if (label->select_info == NULL)
return FALSE;
if (label->select_info->in_drag)
{
label->select_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;
/* The goal here is to return TRUE iff we ate the
* button press to start selecting.
*/
return TRUE;
}
static void
drag_begin_cb (GtkWidget *widget,
GdkDragContext *context,
gpointer data)
{
GtkLabel *label;
GdkPixmap *pixmap = NULL;
g_signal_handlers_disconnect_by_func (widget, drag_begin_cb, NULL);
label = GTK_LABEL (widget);
if ((label->select_info->selection_anchor !=
label->select_info->selection_end) &&
label->text)
{
gint start, end;
gint len;
start = MIN (label->select_info->selection_anchor,
label->select_info->selection_end);
end = MAX (label->select_info->selection_anchor,
label->select_info->selection_end);
len = strlen (label->text);
if (end > len)
end = len;
if (start > len)
start = len;
pixmap = _gtk_text_util_create_drag_icon (widget,
label->text + start,
end - start);
}
if (pixmap)
gtk_drag_set_icon_pixmap (context,
gdk_drawable_get_colormap (pixmap),
pixmap,
NULL,
-2, -2);
else
gtk_drag_set_icon_default (context);
if (pixmap)
g_object_unref (pixmap);
}
static gboolean
gtk_label_motion (GtkWidget *widget,
GdkEventMotion *event)
{
GtkLabel *label;
gint index;
gint x, y;
label = GTK_LABEL (widget);
if (label->select_info == NULL)
return FALSE;
if ((event->state & GDK_BUTTON1_MASK) == 0)
return FALSE;
gdk_window_get_pointer (label->select_info->window,
&x, &y, NULL);
if (label->select_info->in_drag)
{
if (gtk_drag_check_threshold (widget,
label->select_info->drag_start_x,
label->select_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);
label->select_info->in_drag = FALSE;
gtk_target_list_unref (target_list);
}
}
else
{
get_layout_index (label, x, y, &index);
gtk_label_select_region_index (label,
label->select_info->selection_anchor,
index);
}
return TRUE;
}
static void
gtk_label_create_window (GtkLabel *label)
{
GtkWidget *widget;
GdkWindowAttr attributes;
gint attributes_mask;
g_assert (label->select_info);
g_assert (GTK_WIDGET_REALIZED (label));
if (label->select_info->window)
return;
widget = GTK_WIDGET (label);
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.window_type = GDK_WINDOW_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_BUTTON_MOTION_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;
}
label->select_info->window = gdk_window_new (widget->window,
&attributes, attributes_mask);
gdk_window_set_user_data (label->select_info->window, widget);
if (attributes_mask & GDK_WA_CURSOR)
gdk_cursor_unref (attributes.cursor);
}
static void
gtk_label_destroy_window (GtkLabel *label)
{
g_assert (label->select_info);
if (label->select_info->window == NULL)
return;
gdk_window_set_user_data (label->select_info->window, NULL);
gdk_window_destroy (label->select_info->window);
label->select_info->window = NULL;
}
/**
* gtk_label_set_selectable:
* @label: a #GtkLabel
* @setting: %TRUE to allow selecting text in the label
*
* Selectable labels allow the user to select text from the label, for
* copy-and-paste.
*
**/
void
gtk_label_set_selectable (GtkLabel *label,
gboolean setting)
{
gboolean old_setting;
g_return_if_fail (GTK_IS_LABEL (label));
setting = setting != FALSE;
old_setting = label->select_info != NULL;
if (setting)
{
if (label->select_info == NULL)
{
label->select_info = g_new0 (GtkLabelSelectionInfo, 1);
GTK_WIDGET_SET_FLAGS (label, GTK_CAN_FOCUS);
if (GTK_WIDGET_REALIZED (label))
gtk_label_create_window (label);
if (GTK_WIDGET_MAPPED (label))
gdk_window_show (label->select_info->window);
}
}
else
{
if (label->select_info)
{
/* unselect, to give up the selection */
gtk_label_select_region (label, 0, 0);
if (label->select_info->window)
{
gtk_label_destroy_window (label);
}
g_free (label->select_info);
label->select_info = NULL;
GTK_WIDGET_UNSET_FLAGS (label, GTK_CAN_FOCUS);
}
}
if (setting != old_setting)
{
g_object_freeze_notify (G_OBJECT (label));
g_object_notify (G_OBJECT (label), "selectable");
g_object_notify (G_OBJECT (label), "cursor-position");
g_object_notify (G_OBJECT (label), "selection-bound");
g_object_thaw_notify (G_OBJECT (label));
gtk_widget_queue_draw (GTK_WIDGET (label));
}
}
/**
* gtk_label_get_selectable:
* @label: a #GtkLabel
*
* Gets the value set by gtk_label_set_selectable().
*
* Return value: %TRUE if the user can copy text from the label
**/
gboolean
gtk_label_get_selectable (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), FALSE);
return label->select_info != NULL;
}
static void
free_angle (gpointer angle)
{
g_slice_free (gdouble, angle);
}
/**
* 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)
{
gdouble *label_angle;
g_return_if_fail (GTK_IS_LABEL (label));
label_angle = (gdouble *)g_object_get_qdata (G_OBJECT (label), quark_angle);
if (!label_angle)
{
label_angle = g_slice_new (gdouble);
*label_angle = 0.0;
g_object_set_qdata_full (G_OBJECT (label), quark_angle,
label_angle, free_angle);
}
/* 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 (*label_angle != angle)
{
*label_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)
{
gdouble *angle;
g_return_val_if_fail (GTK_IS_LABEL (label), 0.0);
angle = (gdouble *)g_object_get_qdata (G_OBJECT (label), quark_angle);
if (angle)
return *angle;
else
return 0.0;
}
static void
gtk_label_set_selection_text (GtkLabel *label,
GtkSelectionData *selection_data)
{
if ((label->select_info->selection_anchor !=
label->select_info->selection_end) &&
label->text)
{
gint start, end;
gint len;
start = MIN (label->select_info->selection_anchor,
label->select_info->selection_end);
end = MAX (label->select_info->selection_anchor,
label->select_info->selection_end);
len = strlen (label->text);
if (end > len)
end = len;
if (start > len)
start = len;
gtk_selection_data_set_text (selection_data,
label->text + start,
end - start);
}
}
static void
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;
label = GTK_LABEL (user_data_or_owner);
if (label->select_info)
{
label->select_info->selection_anchor = label->select_info->selection_end;
gtk_widget_queue_draw (GTK_WIDGET (label));
}
}
static void
gtk_label_select_region_index (GtkLabel *label,
gint anchor_index,
gint end_index)
{
static const GtkTargetEntry targets[] = {
{ "STRING", 0, 0 },
{ "TEXT", 0, 0 },
{ "COMPOUND_TEXT", 0, 0 },
{ "UTF8_STRING", 0, 0 }
};
g_return_if_fail (GTK_IS_LABEL (label));
if (label->select_info)
{
GtkClipboard *clipboard;
if (label->select_info->selection_anchor == anchor_index &&
label->select_info->selection_end == end_index)
return;
label->select_info->selection_anchor = anchor_index;
label->select_info->selection_end = end_index;
clipboard = gtk_widget_get_clipboard (GTK_WIDGET (label),
GDK_SELECTION_PRIMARY);
if (anchor_index != end_index)
{
gtk_clipboard_set_with_owner (clipboard,
targets,
G_N_ELEMENTS (targets),
get_text_callback,
clear_text_callback,
G_OBJECT (label));
}
else
{
if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (label))
gtk_clipboard_clear (clipboard);
}
gtk_widget_queue_draw (GTK_WIDGET (label));
g_object_freeze_notify (G_OBJECT (label));
g_object_notify (G_OBJECT (label), "cursor-position");
g_object_notify (G_OBJECT (label), "selection-bound");
g_object_thaw_notify (G_OBJECT (label));
}
}
/**
* gtk_label_select_region:
* @label: a #GtkLabel
* @start_offset: start offset (in characters not bytes)
* @end_offset: end offset (in characters not bytes)
*
* Selects a range of characters in the label, if the label is selectable.
* See gtk_label_set_selectable(). If the label is not selectable,
* this function has no effect. If @start_offset or
* @end_offset are -1, then the end of the label will be substituted.
*
**/
void
gtk_label_select_region (GtkLabel *label,
gint start_offset,
gint end_offset)
{
g_return_if_fail (GTK_IS_LABEL (label));
if (label->text && label->select_info)
{
if (start_offset < 0)
start_offset = g_utf8_strlen (label->text, -1);
if (end_offset < 0)
end_offset = g_utf8_strlen (label->text, -1);
gtk_label_select_region_index (label,
g_utf8_offset_to_pointer (label->text, start_offset) - label->text,
g_utf8_offset_to_pointer (label->text, end_offset) - label->text);
}
}
/**
* gtk_label_get_selection_bounds:
* @label: a #GtkLabel
* @start: return location for start of selection, as a character offset
* @end: return location for end of selection, as a character offset
*
* Gets the selected range of characters in the label, returning %TRUE
* if there's a selection.
*
* Return value: %TRUE if selection is non-empty
**/
gboolean
gtk_label_get_selection_bounds (GtkLabel *label,
gint *start,
gint *end)
{
g_return_val_if_fail (GTK_IS_LABEL (label), FALSE);
if (label->select_info == NULL)
{
/* not a selectable label */
if (start)
*start = 0;
if (end)
*end = 0;
return FALSE;
}
else
{
gint start_index, end_index;
gint start_offset, end_offset;
gint len;
start_index = MIN (label->select_info->selection_anchor,
label->select_info->selection_end);
end_index = MAX (label->select_info->selection_anchor,
label->select_info->selection_end);
len = strlen (label->text);
if (end_index > len)
end_index = len;
if (start_index > len)
start_index = len;
start_offset = g_utf8_strlen (label->text, start_index);
end_offset = g_utf8_strlen (label->text, end_index);
if (start_offset > end_offset)
{
gint tmp = start_offset;
start_offset = end_offset;
end_offset = tmp;
}
if (start)
*start = start_offset;
if (end)
*end = end_offset;
return start_offset != end_offset;
}
}
/**
* gtk_label_get_layout:
* @label: a #GtkLabel
*
* Gets the #PangoLayout used to display the label.
* The layout is useful to e.g. convert text positions to
* pixel positions, in combination with gtk_label_get_layout_offsets().
* The returned layout is owned by the label so need not be
* freed by the caller.
*
* Return value: the #PangoLayout for this label
**/
PangoLayout*
gtk_label_get_layout (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), NULL);
gtk_label_ensure_layout (label);
return label->layout;
}
/**
* gtk_label_get_layout_offsets:
* @label: a #GtkLabel
* @x: location to store X offset of layout, or %NULL
* @y: location to store Y offset of layout, or %NULL
*
* Obtains the coordinates where the label will draw the #PangoLayout
* representing the text in the label; useful to convert mouse events
* into coordinates inside the #PangoLayout, e.g. to take some action
* if some part of the label is clicked. Of course you will need to
* create a #GtkEventBox to receive the events, and pack the label
* inside it, since labels are a #GTK_NO_WINDOW widget. Remember
* when using the #PangoLayout functions you need to convert to
* and from pixels using PANGO_PIXELS() or #PANGO_SCALE.
*
**/
void
gtk_label_get_layout_offsets (GtkLabel *label,
gint *x,
gint *y)
{
g_return_if_fail (GTK_IS_LABEL (label));
get_layout_location (label, x, y);
}
/**
* gtk_label_set_use_markup:
* @label: a #GtkLabel
* @setting: %TRUE if the label's text should be parsed for markup.
*
* Sets whether the text of the label contains markup in <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->use_markup;
}
/**
* gtk_label_set_use_underline:
* @label: a #GtkLabel
* @setting: %TRUE if underlines in the text indicate mnemonics
*
* If true, an underline in the text indicates the next character should be
* used for the mnemonic accelerator key.
*/
void
gtk_label_set_use_underline (GtkLabel *label,
gboolean setting)
{
g_return_if_fail (GTK_IS_LABEL (label));
gtk_label_set_use_underline_internal (label, setting);
gtk_label_recalculate (label);
if (label->use_underline)
gtk_label_setup_mnemonic (label, label->mnemonic_keyval);
}
/**
* gtk_label_get_use_underline:
* @label: a #GtkLabel
*
* Returns whether an embedded underline in the label indicates a
* mnemonic. See gtk_label_set_use_underline ().
*
* Return value: %TRUE whether an embedded underline in the label indicates
* the mnemonic accelerator keys.
**/
gboolean
gtk_label_get_use_underline (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), FALSE);
return label->use_underline;
}
/**
* 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)
{
g_return_if_fail (GTK_IS_LABEL (label));
single_line_mode = single_line_mode != FALSE;
if (label->single_line_mode != single_line_mode)
{
label->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->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)
{
GdkKeymap *keymap = gdk_keymap_get_for_display (gtk_widget_get_display (GTK_WIDGET (label)));
PangoDirection keymap_direction = gdk_keymap_get_direction (keymap);
PangoDirection cursor_direction = get_cursor_direction (label);
gboolean split_cursor;
PangoRectangle strong_pos, weak_pos;
g_object_get (gtk_widget_get_settings (GTK_WIDGET (label)),
"gtk-split-cursor", &split_cursor,
NULL);
gtk_label_ensure_layout (label);
pango_layout_get_cursor_pos (label->layout, index,
&strong_pos, &weak_pos);
if (split_cursor)
{
*x = strong_pos.x / PANGO_SCALE;
*y = strong_pos.y / PANGO_SCALE;
}
else
{
if (keymap_direction == cursor_direction)
{
*x = strong_pos.x / PANGO_SCALE;
*y = strong_pos.y / PANGO_SCALE;
}
else
{
*x = weak_pos.x / PANGO_SCALE;
*y = weak_pos.y / PANGO_SCALE;
}
}
}
static gint
gtk_label_move_logically (GtkLabel *label,
gint start,
gint count)
{
gint offset = g_utf8_pointer_to_offset (label->text,
label->text + start);
if (label->text)
{
PangoLogAttr *log_attrs;
gint n_attrs;
gint length;
gtk_label_ensure_layout (label);
length = g_utf8_strlen (label->text, -1);
pango_layout_get_log_attrs (label->layout, &log_attrs, &n_attrs);
while (count > 0 && offset < length)
{
do
offset++;
while (offset < length && !log_attrs[offset].is_cursor_position);
count--;
}
while (count < 0 && offset > 0)
{
do
offset--;
while (offset > 0 && !log_attrs[offset].is_cursor_position);
count++;
}
g_free (log_attrs);
}
return g_utf8_offset_to_pointer (label->text, offset) - label->text;
}
static gint
gtk_label_move_visually (GtkLabel *label,
gint start,
gint count)
{
gint index;
index = start;
while (count != 0)
{
int new_index, new_trailing;
gboolean split_cursor;
gboolean strong;
gtk_label_ensure_layout (label);
g_object_get (gtk_widget_get_settings (GTK_WIDGET (label)),
"gtk-split-cursor", &split_cursor,
NULL);
if (split_cursor)
strong = TRUE;
else
{
GdkKeymap *keymap = gdk_keymap_get_for_display (gtk_widget_get_display (GTK_WIDGET (label)));
PangoDirection keymap_direction = gdk_keymap_get_direction (keymap);
strong = keymap_direction == get_cursor_direction (label);
}
if (count > 0)
{
pango_layout_move_cursor_visually (label->layout, strong, index, 0, 1, &new_index, &new_trailing);
count--;
}
else
{
pango_layout_move_cursor_visually (label->layout, strong, index, 0, -1, &new_index, &new_trailing);
count++;
}
if (new_index < 0 || new_index == G_MAXINT)
break;
index = new_index;
while (new_trailing--)
index = g_utf8_next_char (label->text + new_index) - label->text;
}
return index;
}
static gint
gtk_label_move_forward_word (GtkLabel *label,
gint start)
{
gint new_pos = g_utf8_pointer_to_offset (label->text,
label->text + start);
gint length;
length = g_utf8_strlen (label->text, -1);
if (new_pos < length)
{
PangoLogAttr *log_attrs;
gint n_attrs;
gtk_label_ensure_layout (label);
pango_layout_get_log_attrs (label->layout, &log_attrs, &n_attrs);
/* Find the next word end */
new_pos++;
while (new_pos < n_attrs && !log_attrs[new_pos].is_word_end)
new_pos++;
g_free (log_attrs);
}
return g_utf8_offset_to_pointer (label->text, new_pos) - label->text;
}
static gint
gtk_label_move_backward_word (GtkLabel *label,
gint start)
{
gint new_pos = g_utf8_pointer_to_offset (label->text,
label->text + start);
if (new_pos > 0)
{
PangoLogAttr *log_attrs;
gint n_attrs;
gtk_label_ensure_layout (label);
pango_layout_get_log_attrs (label->layout, &log_attrs, &n_attrs);
new_pos -= 1;
/* Find the previous word beginning */
while (new_pos > 0 && !log_attrs[new_pos].is_word_start)
new_pos--;
g_free (log_attrs);
}
return g_utf8_offset_to_pointer (label->text, new_pos) - label->text;
}
static void
gtk_label_move_cursor (GtkLabel *label,
GtkMovementStep step,
gint count,
gboolean extend_selection)
{
gint old_pos;
gint new_pos;
if (label->select_info == NULL)
return;
old_pos = new_pos = label->select_info->selection_end;
if (label->select_info->selection_end != label->select_info->selection_anchor &&
!extend_selection)
{
/* If we have a current selection and aren't extending it, move to the
* start/or end of the selection as appropriate
*/
switch (step)
{
case GTK_MOVEMENT_VISUAL_POSITIONS:
{
gint end_x, end_y;
gint anchor_x, anchor_y;
gboolean end_is_left;
get_better_cursor (label, label->select_info->selection_end, &end_x, &end_y);
get_better_cursor (label, label->select_info->selection_anchor, &anchor_x, &anchor_y);
end_is_left = (end_y < anchor_y) || (end_y == anchor_y && end_x < anchor_x);
if (count < 0)
new_pos = end_is_left ? label->select_info->selection_end : label->select_info->selection_anchor;
else
new_pos = !end_is_left ? label->select_info->selection_end : label->select_info->selection_anchor;
break;
}
case GTK_MOVEMENT_LOGICAL_POSITIONS:
case GTK_MOVEMENT_WORDS:
if (count < 0)
new_pos = MIN (label->select_info->selection_end, label->select_info->selection_anchor);
else
new_pos = MAX (label->select_info->selection_end, label->select_info->selection_anchor);
break;
case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
case GTK_MOVEMENT_PARAGRAPH_ENDS:
case GTK_MOVEMENT_BUFFER_ENDS:
/* FIXME: Can do better here */
new_pos = count < 0 ? 0 : strlen (label->text);
break;
case GTK_MOVEMENT_DISPLAY_LINES:
case GTK_MOVEMENT_PARAGRAPHS:
case GTK_MOVEMENT_PAGES:
case GTK_MOVEMENT_HORIZONTAL_PAGES:
break;
}
}
else
{
switch (step)
{
case GTK_MOVEMENT_LOGICAL_POSITIONS:
new_pos = gtk_label_move_logically (label, new_pos, count);
break;
case GTK_MOVEMENT_VISUAL_POSITIONS:
new_pos = gtk_label_move_visually (label, new_pos, count);
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 (label->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,
label->select_info->selection_anchor,
new_pos);
else
gtk_label_select_region_index (label, new_pos, new_pos);
}
static void
gtk_label_copy_clipboard (GtkLabel *label)
{
if (label->text && label->select_info)
{
gint start, end;
gint len;
start = MIN (label->select_info->selection_anchor,
label->select_info->selection_end);
end = MAX (label->select_info->selection_anchor,
label->select_info->selection_end);
len = strlen (label->text);
if (end > len)
end = len;
if (start > len)
start = len;
if (start != end)
gtk_clipboard_set_text (gtk_widget_get_clipboard (GTK_WIDGET (label),
GDK_SELECTION_CLIPBOARD),
label->text + start, end - start);
}
}
static void
gtk_label_select_all (GtkLabel *label)
{
gtk_label_select_region_index (label, 0, strlen (label->text));
}
/* Quick hack of a popup menu
*/
static void
activate_cb (GtkWidget *menuitem,
GtkLabel *label)
{
const gchar *signal = g_object_get_data (G_OBJECT (menuitem), "gtk-signal");
g_signal_emit_by_name (label, signal);
}
static void
append_action_signal (GtkLabel *label,
GtkWidget *menu,
const gchar *stock_id,
const gchar *signal,
gboolean sensitive)
{
GtkWidget *menuitem = gtk_image_menu_item_new_from_stock (stock_id, NULL);
g_object_set_data (G_OBJECT (menuitem), 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;
label = GTK_LABEL (attach_widget);
if (label->select_info)
label->select_info->popup_menu = NULL;
}
static void
popup_position_func (GtkMenu *menu,
gint *x,
gint *y,
gboolean *push_in,
gpointer user_data)
{
GtkLabel *label;
GtkWidget *widget;
GtkRequisition req;
GdkScreen *screen;
label = GTK_LABEL (user_data);
widget = GTK_WIDGET (label);
if (label->select_info == NULL)
return;
g_return_if_fail (GTK_WIDGET_REALIZED (label));
screen = gtk_widget_get_screen (widget);
gdk_window_get_origin (widget->window, x, y);
gtk_widget_size_request (label->select_info->popup_menu, &req);
*x += widget->allocation.width / 2;
*y += widget->allocation.height;
*x = CLAMP (*x, 0, MAX (0, gdk_screen_get_width (screen) - req.width));
*y = CLAMP (*y, 0, MAX (0, gdk_screen_get_height (screen) - req.height));
}
static void
gtk_label_do_popup (GtkLabel *label,
GdkEventButton *event)
{
GtkWidget *menuitem;
gboolean have_selection;
if (label->select_info == NULL)
return;
if (label->select_info->popup_menu)
gtk_widget_destroy (label->select_info->popup_menu);
label->select_info->popup_menu = gtk_menu_new ();
gtk_menu_attach_to_widget (GTK_MENU (label->select_info->popup_menu),
GTK_WIDGET (label),
popup_menu_detach);
have_selection =
label->select_info->selection_anchor != label->select_info->selection_end;
append_action_signal (label, label->select_info->popup_menu, GTK_STOCK_CUT, "cut_clipboard",
FALSE);
append_action_signal (label, label->select_info->popup_menu, GTK_STOCK_COPY, "copy_clipboard",
have_selection);
append_action_signal (label, label->select_info->popup_menu, GTK_STOCK_PASTE, "paste_clipboard",
FALSE);
menuitem = gtk_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 (label->select_info->popup_menu), menuitem);
menuitem = gtk_separator_menu_item_new ();
gtk_widget_show (menuitem);
gtk_menu_shell_append (GTK_MENU_SHELL (label->select_info->popup_menu), menuitem);
menuitem = gtk_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 (label->select_info->popup_menu), menuitem);
g_signal_emit (label,
signals[POPULATE_POPUP],
0,
label->select_info->popup_menu);
if (event)
gtk_menu_popup (GTK_MENU (label->select_info->popup_menu), NULL, NULL,
NULL, NULL,
event->button, event->time);
else
gtk_menu_popup (GTK_MENU (label->select_info->popup_menu), NULL, NULL,
popup_position_func, label,
0, gtk_get_current_event_time ());
}
#define __GTK_LABEL_C__
#include "gtkaliasdef.c"
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