forked from AuroraMiddleware/gtk
a38d119f16
Instead fold the code into the sole caller and get rid of gailmisc usage in the text view accessible altogether.
562 lines
23 KiB
C
562 lines
23 KiB
C
/* GAIL - The GNOME Accessibility Implementation Library
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* Copyright 2001 Sun Microsystems Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <math.h>
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#include <stdlib.h>
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#include <gtk/gtk.h>
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#include "gailmisc.h"
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/* IMPORTANT!!! This source file does NOT contain the implementation
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* code for AtkUtil - for that code, please see gail/gail.c.
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*/
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/**
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* SECTION:gailmisc
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* @Short_description: GailMisc is a set of utility functions which may be
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* useful to implementors of Atk interfaces for custom widgets.
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* @Title: GailMisc
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*
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* GailMisc is a set of utility function which are used in the implemementation
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* of Atk interfaces for GTK+ widgets. They may be useful to implementors of
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* Atk interfaces for custom widgets.
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*/
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/**
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* gail_misc_get_extents_from_pango_rectangle:
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* @widget: The widget that contains the PangoLayout, that contains
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* the PangoRectangle
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* @char_rect: The #PangoRectangle from which to calculate extents
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* @x_layout: The x-offset at which the widget displays the
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* PangoLayout that contains the PangoRectangle, relative to @widget
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* @y_layout: The y-offset at which the widget displays the
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* PangoLayout that contains the PangoRectangle, relative to @widget
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* @x: The x-position of the #PangoRectangle relative to @coords
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* @y: The y-position of the #PangoRectangle relative to @coords
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* @width: The width of the #PangoRectangle
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* @height: The height of the #PangoRectangle
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* @coords: An #AtkCoordType enumeration
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*
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* Gets the extents of @char_rect in device coordinates,
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* relative to either top-level window or screen coordinates as
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* specified by @coords.
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**/
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void
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gail_misc_get_extents_from_pango_rectangle (GtkWidget *widget,
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PangoRectangle *char_rect,
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gint x_layout,
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gint y_layout,
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gint *x,
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gint *y,
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gint *width,
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gint *height,
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AtkCoordType coords)
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{
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gint x_window, y_window, x_toplevel, y_toplevel;
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gail_misc_get_origins (widget, &x_window, &y_window,
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&x_toplevel, &y_toplevel);
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*x = (char_rect->x / PANGO_SCALE) + x_layout + x_window;
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*y = (char_rect->y / PANGO_SCALE) + y_layout + y_window;
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if (coords == ATK_XY_WINDOW)
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{
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*x -= x_toplevel;
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*y -= y_toplevel;
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}
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else if (coords != ATK_XY_SCREEN)
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{
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*x = 0;
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*y = 0;
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*height = 0;
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*width = 0;
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return;
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}
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*height = char_rect->height / PANGO_SCALE;
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*width = char_rect->width / PANGO_SCALE;
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return;
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}
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/**
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* gail_misc_get_index_at_point_in_layout:
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* @widget: A #GtkWidget
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* @layout: The #PangoLayout from which to get the index at the
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* specified point.
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* @x_layout: The x-offset at which the widget displays the
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* #PangoLayout, relative to @widget
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* @y_layout: The y-offset at which the widget displays the
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* #PangoLayout, relative to @widget
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* @x: The x-coordinate relative to @coords at which to
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* calculate the index
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* @y: The y-coordinate relative to @coords at which to
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* calculate the index
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* @coords: An #AtkCoordType enumeration
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*
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* Gets the byte offset at the specified @x and @y in a #PangoLayout.
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*
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* Returns: the byte offset at the specified @x and @y in a
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* #PangoLayout
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**/
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gint
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gail_misc_get_index_at_point_in_layout (GtkWidget *widget,
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PangoLayout *layout,
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gint x_layout,
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gint y_layout,
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gint x,
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gint y,
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AtkCoordType coords)
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{
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gint index, x_window, y_window, x_toplevel, y_toplevel;
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gint x_temp, y_temp;
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gboolean ret;
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gail_misc_get_origins (widget, &x_window, &y_window,
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&x_toplevel, &y_toplevel);
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x_temp = x - x_layout - x_window;
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y_temp = y - y_layout - y_window;
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if (coords == ATK_XY_WINDOW)
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{
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x_temp += x_toplevel;
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y_temp += y_toplevel;
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}
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else if (coords != ATK_XY_SCREEN)
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return -1;
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ret = pango_layout_xy_to_index (layout,
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x_temp * PANGO_SCALE,
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y_temp * PANGO_SCALE,
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&index, NULL);
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if (!ret)
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{
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if (x_temp < 0 || y_temp < 0)
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index = 0;
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else
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index = -1;
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}
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return index;
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}
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/**
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* gail_misc_add_attribute:
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* @attrib_set: The #AtkAttributeSet to add the attribute to
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* @attr: The AtkTextAttrribute which identifies the attribute to be added
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* @value: The attribute value
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*
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* Creates an #AtkAttribute from @attr and @value, and adds it
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* to @attrib_set.
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*
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* Returns: A pointer to the new #AtkAttributeSet.
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**/
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AtkAttributeSet*
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gail_misc_add_attribute (AtkAttributeSet *attrib_set,
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AtkTextAttribute attr,
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gchar *value)
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{
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AtkAttributeSet *return_set;
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AtkAttribute *at = g_malloc (sizeof (AtkAttribute));
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at->name = g_strdup (atk_text_attribute_get_name (attr));
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at->value = value;
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return_set = g_slist_prepend(attrib_set, at);
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return return_set;
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}
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/**
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* gail_misc_layout_get_run_attributes:
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* @attrib_set: The #AtkAttributeSet to add the attribute to
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* @layout: The PangoLayout from which the attributes will be obtained
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* @text: The text
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* @offset: The offset at which the attributes are required
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* @start_offset: The start offset of the current run
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* @end_offset: The end offset of the current run
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*
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* Adds the attributes for the run starting at offset to the specified
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* attribute set.
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*
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* Returns: A pointer to the #AtkAttributeSet.
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**/
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AtkAttributeSet*
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gail_misc_layout_get_run_attributes (AtkAttributeSet *attrib_set,
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PangoLayout *layout,
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const gchar *text,
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gint offset,
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gint *start_offset,
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gint *end_offset)
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{
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PangoAttrIterator *iter;
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PangoAttrList *attr;
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PangoAttrString *pango_string;
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PangoAttrInt *pango_int;
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PangoAttrColor *pango_color;
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PangoAttrLanguage *pango_lang;
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PangoAttrFloat *pango_float;
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gint index, start_index, end_index;
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gboolean is_next = TRUE;
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gchar *value = NULL;
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glong len;
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len = g_utf8_strlen (text, -1);
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/* Grab the attributes of the PangoLayout, if any */
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if ((attr = pango_layout_get_attributes (layout)) == NULL)
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{
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*start_offset = 0;
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*end_offset = len;
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return attrib_set;
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}
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iter = pango_attr_list_get_iterator (attr);
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/* Get invariant range offsets */
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/* If offset out of range, set offset in range */
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if (offset > len)
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offset = len;
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else if (offset < 0)
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offset = 0;
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index = g_utf8_offset_to_pointer (text, offset) - text;
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pango_attr_iterator_range (iter, &start_index, &end_index);
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while (is_next)
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{
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if (index >= start_index && index < end_index)
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{
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*start_offset = g_utf8_pointer_to_offset (text,
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text + start_index);
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if (end_index == G_MAXINT)
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/* Last iterator */
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end_index = len;
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*end_offset = g_utf8_pointer_to_offset (text,
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text + end_index);
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break;
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}
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is_next = pango_attr_iterator_next (iter);
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pango_attr_iterator_range (iter, &start_index, &end_index);
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}
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/* Get attributes */
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if ((pango_string = (PangoAttrString*) pango_attr_iterator_get (iter,
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PANGO_ATTR_FAMILY)) != NULL)
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{
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value = g_strdup_printf("%s", pango_string->value);
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_FAMILY_NAME,
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value);
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}
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if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
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PANGO_ATTR_STYLE)) != NULL)
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{
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_STYLE,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STYLE, pango_int->value)));
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}
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if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
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PANGO_ATTR_WEIGHT)) != NULL)
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{
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value = g_strdup_printf("%i", pango_int->value);
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_WEIGHT,
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value);
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}
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if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
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PANGO_ATTR_VARIANT)) != NULL)
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{
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_VARIANT,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_VARIANT, pango_int->value)));
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}
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if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
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PANGO_ATTR_STRETCH)) != NULL)
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{
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_STRETCH,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STRETCH, pango_int->value)));
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}
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if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
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PANGO_ATTR_SIZE)) != NULL)
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{
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value = g_strdup_printf("%i", pango_int->value / PANGO_SCALE);
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_SIZE,
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value);
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}
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if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
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PANGO_ATTR_UNDERLINE)) != NULL)
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{
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_UNDERLINE,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_UNDERLINE, pango_int->value)));
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}
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if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
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PANGO_ATTR_STRIKETHROUGH)) != NULL)
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{
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_STRIKETHROUGH,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STRIKETHROUGH, pango_int->value)));
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}
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if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
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PANGO_ATTR_RISE)) != NULL)
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{
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value = g_strdup_printf("%i", pango_int->value);
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_RISE,
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value);
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}
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if ((pango_lang = (PangoAttrLanguage*) pango_attr_iterator_get (iter,
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PANGO_ATTR_LANGUAGE)) != NULL)
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{
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value = g_strdup( pango_language_to_string( pango_lang->value));
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_LANGUAGE,
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value);
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}
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if ((pango_float = (PangoAttrFloat*) pango_attr_iterator_get (iter,
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PANGO_ATTR_SCALE)) != NULL)
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{
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value = g_strdup_printf("%g", pango_float->value);
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_SCALE,
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value);
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}
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if ((pango_color = (PangoAttrColor*) pango_attr_iterator_get (iter,
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PANGO_ATTR_FOREGROUND)) != NULL)
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{
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value = g_strdup_printf ("%u,%u,%u",
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pango_color->color.red,
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pango_color->color.green,
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pango_color->color.blue);
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_FG_COLOR,
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value);
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}
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if ((pango_color = (PangoAttrColor*) pango_attr_iterator_get (iter,
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PANGO_ATTR_BACKGROUND)) != NULL)
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{
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value = g_strdup_printf ("%u,%u,%u",
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pango_color->color.red,
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pango_color->color.green,
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pango_color->color.blue);
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_BG_COLOR,
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value);
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}
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pango_attr_iterator_destroy (iter);
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return attrib_set;
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}
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/**
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* gail_misc_get_default_attributes:
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* @attrib_set: The #AtkAttributeSet to add the attribute to
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* @layout: The PangoLayout from which the attributes will be obtained
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* @widget: The GtkWidget for which the default attributes are required.
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*
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* Adds the default attributes to the specified attribute set.
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*
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* Returns: A pointer to the #AtkAttributeSet.
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**/
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AtkAttributeSet*
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gail_misc_get_default_attributes (AtkAttributeSet *attrib_set,
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PangoLayout *layout,
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GtkWidget *widget)
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{
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PangoContext *context;
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GtkStyleContext *style_context;
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gint int_value;
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PangoWrapMode mode;
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GdkRGBA color;
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gchar *value;
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_DIRECTION,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_DIRECTION,
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gtk_widget_get_direction (widget))));
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context = pango_layout_get_context (layout);
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if (context)
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{
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PangoLanguage* language;
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PangoFontDescription* font;
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language = pango_context_get_language (context);
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if (language)
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{
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_LANGUAGE,
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g_strdup (pango_language_to_string (language)));
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}
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font = pango_context_get_font_description (context);
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if (font)
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{
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_STYLE,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STYLE,
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pango_font_description_get_style (font))));
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_VARIANT,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_VARIANT,
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pango_font_description_get_variant (font))));
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_STRETCH,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STRETCH,
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pango_font_description_get_stretch (font))));
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_FAMILY_NAME,
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g_strdup (pango_font_description_get_family (font)));
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_WEIGHT,
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g_strdup_printf ("%d",
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pango_font_description_get_weight (font)));
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_SIZE,
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g_strdup_printf ("%i",
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pango_font_description_get_size (font) / PANGO_SCALE));
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}
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}
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if (pango_layout_get_justify (layout))
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{
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int_value = 3;
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}
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else
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{
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PangoAlignment align;
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align = pango_layout_get_alignment (layout);
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if (align == PANGO_ALIGN_LEFT)
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int_value = 0;
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else if (align == PANGO_ALIGN_CENTER)
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int_value = 2;
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else /* if (align == PANGO_ALIGN_RIGHT) */
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int_value = 1;
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}
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_JUSTIFICATION,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_JUSTIFICATION,
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int_value)));
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mode = pango_layout_get_wrap (layout);
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if (mode == PANGO_WRAP_WORD)
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int_value = 2;
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else /* if (mode == PANGO_WRAP_CHAR) */
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int_value = 1;
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attrib_set = gail_misc_add_attribute (attrib_set,
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ATK_TEXT_ATTR_WRAP_MODE,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_WRAP_MODE,
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int_value)));
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style_context = gtk_widget_get_style_context (widget);
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gtk_style_context_get_background_color (style_context, 0, &color);
|
|
value = g_strdup_printf ("%u,%u,%u",
|
|
(guint) ceil (color.red * 65536 - color.red),
|
|
(guint) ceil (color.green * 65536 - color.green),
|
|
(guint) ceil (color.blue * 65536 - color.blue));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_BG_COLOR,
|
|
value);
|
|
|
|
gtk_style_context_get_color (style_context, 0, &color);
|
|
value = g_strdup_printf ("%u,%u,%u",
|
|
(guint) ceil (color.red * 65536 - color.red),
|
|
(guint) ceil (color.green * 65536 - color.green),
|
|
(guint) ceil (color.blue * 65536 - color.blue));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_FG_COLOR,
|
|
value);
|
|
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_FG_STIPPLE,
|
|
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_FG_STIPPLE,
|
|
0)));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_BG_STIPPLE,
|
|
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_BG_STIPPLE,
|
|
0)));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_STRIKETHROUGH,
|
|
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STRIKETHROUGH,
|
|
0)));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_UNDERLINE,
|
|
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_UNDERLINE,
|
|
0)));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_RISE,
|
|
g_strdup_printf ("%i", 0));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_SCALE,
|
|
g_strdup_printf ("%g", 1.0));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_BG_FULL_HEIGHT,
|
|
g_strdup_printf ("%i", 0));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_PIXELS_INSIDE_WRAP,
|
|
g_strdup_printf ("%i", 0));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_PIXELS_BELOW_LINES,
|
|
g_strdup_printf ("%i", 0));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_PIXELS_ABOVE_LINES,
|
|
g_strdup_printf ("%i", 0));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_EDITABLE,
|
|
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_EDITABLE,
|
|
0)));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_INVISIBLE,
|
|
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_INVISIBLE,
|
|
0)));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_INDENT,
|
|
g_strdup_printf ("%i", 0));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_RIGHT_MARGIN,
|
|
g_strdup_printf ("%i", 0));
|
|
attrib_set = gail_misc_add_attribute (attrib_set,
|
|
ATK_TEXT_ATTR_LEFT_MARGIN,
|
|
g_strdup_printf ("%i", 0));
|
|
return attrib_set;
|
|
}
|
|
|
|
/**
|
|
* gail_misc_get_origins:
|
|
* @widget: a #GtkWidget
|
|
* @x_window: the x-origin of the widget->window
|
|
* @y_window: the y-origin of the widget->window
|
|
* @x_toplevel: the x-origin of the toplevel window for widget->window
|
|
* @y_toplevel: the y-origin of the toplevel window for widget->window
|
|
*
|
|
* Gets the origin of the widget window, and the origin of the
|
|
* widgets top-level window.
|
|
**/
|
|
void
|
|
gail_misc_get_origins (GtkWidget *widget,
|
|
gint *x_window,
|
|
gint *y_window,
|
|
gint *x_toplevel,
|
|
gint *y_toplevel)
|
|
{
|
|
GdkWindow *window;
|
|
|
|
if (GTK_IS_TREE_VIEW (widget))
|
|
window = gtk_tree_view_get_bin_window (GTK_TREE_VIEW (widget));
|
|
else
|
|
window = gtk_widget_get_window (widget);
|
|
|
|
gdk_window_get_origin (window, x_window, y_window);
|
|
window = gdk_window_get_toplevel (gtk_widget_get_window (widget));
|
|
gdk_window_get_origin (window, x_toplevel, y_toplevel);
|
|
}
|