/* GAIL - The GNOME Accessibility Enabling Library
* Copyright 2001 Sun Microsystems Inc.
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "gailtextcell.h"
#include "gailcontainercell.h"
#include "gailcellparent.h"
#include <libgail-util/gailmisc.h>
#include "gail-private-macros.h"
static void gail_text_cell_class_init (GailTextCellClass *klass);
static void gail_text_cell_init (GailTextCell *text_cell);
static void gail_text_cell_finalize (GObject *object);
static const gchar* gail_text_cell_get_name (AtkObject *atk_obj);
static void atk_text_interface_init (AtkTextIface *iface);
/* atktext.h */
static gchar* gail_text_cell_get_text (AtkText *text,
gint start_pos,
gint end_pos);
static gunichar gail_text_cell_get_character_at_offset (AtkText *text,
gint offset);
static gchar* gail_text_cell_get_text_before_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gchar* gail_text_cell_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gchar* gail_text_cell_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gint gail_text_cell_get_character_count (AtkText *text);
static gint gail_text_cell_get_caret_offset (AtkText *text);
static gboolean gail_text_cell_set_caret_offset (AtkText *text,
gint offset);
static void gail_text_cell_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords);
static gint gail_text_cell_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords);
static AtkAttributeSet* gail_text_cell_get_run_attributes
(AtkText *text,
gint offset,
gint *start_offset,
gint *end_offset);
static AtkAttributeSet* gail_text_cell_get_default_attributes
(AtkText *text);
static PangoLayout* create_pango_layout (GtkCellRendererText *gtk_renderer,
GtkWidget *widget);
static void add_attr (PangoAttrList *attr_list,
PangoAttribute *attr);
/* Misc */
static gboolean gail_text_cell_update_cache (GailRendererCell *cell,
gboolean emit_change_signal);
gchar *gail_text_cell_property_list[] = {
/* Set font_desc first since it resets other values if it is NULL */
"font_desc",
"attributes",
"background_gdk",
"editable",
"family",
"foreground_gdk",
"rise",
"scale",
"size",
"size_points",
"stretch",
"strikethrough",
"style",
"text",
"underline",
"variant",
"weight",
/* Also need the sets */
"background_set",
"editable_set",
"family_set",
"foreground_set",
"rise_set",
"scale_set",
"size_set",
"stretch_set",
"strikethrough_set",
"style_set",
"underline_set",
"variant_set",
"weight_set",
NULL
};
G_DEFINE_TYPE_WITH_CODE (GailTextCell, gail_text_cell, GAIL_TYPE_RENDERER_CELL,
G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, atk_text_interface_init))
static void
gail_text_cell_class_init (GailTextCellClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *atk_object_class = ATK_OBJECT_CLASS (klass);
GailRendererCellClass *renderer_cell_class = GAIL_RENDERER_CELL_CLASS (klass);
renderer_cell_class->update_cache = gail_text_cell_update_cache;
renderer_cell_class->property_list = gail_text_cell_property_list;
atk_object_class->get_name = gail_text_cell_get_name;
gobject_class->finalize = gail_text_cell_finalize;
}
/* atktext.h */
static void
gail_text_cell_init (GailTextCell *text_cell)
{
text_cell->cell_text = NULL;
text_cell->caret_pos = 0;
text_cell->cell_length = 0;
text_cell->textutil = gail_text_util_new ();
atk_state_set_add_state (GAIL_CELL (text_cell)->state_set,
ATK_STATE_SINGLE_LINE);
}
AtkObject*
gail_text_cell_new (void)
{
GObject *object;
AtkObject *atk_object;
GailRendererCell *cell;
object = g_object_new (GAIL_TYPE_TEXT_CELL, NULL);
g_return_val_if_fail (object != NULL, NULL);
atk_object = ATK_OBJECT (object);
atk_object->role = ATK_ROLE_TABLE_CELL;
cell = GAIL_RENDERER_CELL(object);
cell->renderer = gtk_cell_renderer_text_new ();
g_object_ref_sink (cell->renderer);
return atk_object;
}
static void
gail_text_cell_finalize (GObject *object)
{
GailTextCell *text_cell = GAIL_TEXT_CELL (object);
g_object_unref (text_cell->textutil);
g_free (text_cell->cell_text);
G_OBJECT_CLASS (gail_text_cell_parent_class)->finalize (object);
}
static const gchar*
gail_text_cell_get_name (AtkObject *atk_obj)
{
if (atk_obj->name)
return atk_obj->name;
else
{
GailTextCell *text_cell = GAIL_TEXT_CELL (atk_obj);
return text_cell->cell_text;
}
}
static gboolean
gail_text_cell_update_cache (GailRendererCell *cell,
gboolean emit_change_signal)
{
GailTextCell *text_cell = GAIL_TEXT_CELL (cell);
AtkObject *obj = ATK_OBJECT (cell);
gboolean rv = FALSE;
gint temp_length;
gchar *new_cache;
g_object_get (G_OBJECT (cell->renderer), "text", &new_cache, NULL);
if (text_cell->cell_text)
{
/*
* If the new value is NULL and the old value isn't NULL, then the
* value has changed.
*/
if (new_cache == NULL ||
strcmp (text_cell->cell_text, new_cache))
{
g_free (text_cell->cell_text);
temp_length = text_cell->cell_length;
text_cell->cell_text = NULL;
text_cell->cell_length = 0;
if (emit_change_signal)
{
g_signal_emit_by_name (cell, "text_changed::delete", 0, temp_length);
if (obj->name == NULL)
g_object_notify (G_OBJECT (obj), "accessible-name");
}
if (new_cache)
rv = TRUE;
}
}
else
rv = TRUE;
if (rv)
{
if (new_cache == NULL)
{
text_cell->cell_text = g_strdup ("");
text_cell->cell_length = 0;
}
else
{
text_cell->cell_text = g_strdup (new_cache);
text_cell->cell_length = g_utf8_strlen (new_cache, -1);
}
}
g_free (new_cache);
gail_text_util_text_setup (text_cell->textutil, text_cell->cell_text);
if (rv)
{
if (emit_change_signal)
{
g_signal_emit_by_name (cell, "text_changed::insert",
0, text_cell->cell_length);
if (obj->name == NULL)
g_object_notify (G_OBJECT (obj), "accessible-name");
}
}
return rv;
}
static void
atk_text_interface_init (AtkTextIface *iface)
{
iface->get_text = gail_text_cell_get_text;
iface->get_character_at_offset = gail_text_cell_get_character_at_offset;
iface->get_text_before_offset = gail_text_cell_get_text_before_offset;
iface->get_text_at_offset = gail_text_cell_get_text_at_offset;
iface->get_text_after_offset = gail_text_cell_get_text_after_offset;
iface->get_character_count = gail_text_cell_get_character_count;
iface->get_caret_offset = gail_text_cell_get_caret_offset;
iface->set_caret_offset = gail_text_cell_set_caret_offset;
iface->get_run_attributes = gail_text_cell_get_run_attributes;
iface->get_default_attributes = gail_text_cell_get_default_attributes;
iface->get_character_extents = gail_text_cell_get_character_extents;
iface->get_offset_at_point = gail_text_cell_get_offset_at_point;
}
static gchar*
gail_text_cell_get_text (AtkText *text,
gint start_pos,
gint end_pos)
{
if (GAIL_TEXT_CELL (text)->cell_text)
return gail_text_util_get_substring (GAIL_TEXT_CELL (text)->textutil,
start_pos, end_pos);
else
return g_strdup ("");
}
static gchar*
gail_text_cell_get_text_before_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
return gail_text_util_get_text (GAIL_TEXT_CELL (text)->textutil,
NULL, GAIL_BEFORE_OFFSET, boundary_type, offset, start_offset,
end_offset);
}
static gchar*
gail_text_cell_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
return gail_text_util_get_text (GAIL_TEXT_CELL (text)->textutil,
NULL, GAIL_AT_OFFSET, boundary_type, offset, start_offset, end_offset);
}
static gchar*
gail_text_cell_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
return gail_text_util_get_text (GAIL_TEXT_CELL (text)->textutil,
NULL, GAIL_AFTER_OFFSET, boundary_type, offset, start_offset,
end_offset);
}
static gint
gail_text_cell_get_character_count (AtkText *text)
{
if (GAIL_TEXT_CELL (text)->cell_text != NULL)
return GAIL_TEXT_CELL (text)->cell_length;
else
return 0;
}
static gint
gail_text_cell_get_caret_offset (AtkText *text)
{
return GAIL_TEXT_CELL (text)->caret_pos;
}
static gboolean
gail_text_cell_set_caret_offset (AtkText *text,
gint offset)
{
GailTextCell *text_cell = GAIL_TEXT_CELL (text);
if (text_cell->cell_text == NULL)
return FALSE;
else
{
/* Only set the caret within the bounds and if it is to a new position. */
if (offset >= 0 &&
offset <= text_cell->cell_length &&
offset != text_cell->caret_pos)
{
text_cell->caret_pos = offset;
/* emit the signal */
g_signal_emit_by_name (text, "text_caret_moved", offset);
return TRUE;
}
else
return FALSE;
}
}
static AtkAttributeSet*
gail_text_cell_get_run_attributes (AtkText *text,
gint offset,
gint *start_offset,
gint *end_offset)
{
GailRendererCell *gail_renderer;
GtkCellRendererText *gtk_renderer;
AtkAttributeSet *attrib_set = NULL;
PangoLayout *layout;
AtkObject *parent;
GtkWidget *widget;
gail_renderer = GAIL_RENDERER_CELL (text);
gtk_renderer = GTK_CELL_RENDERER_TEXT (gail_renderer->renderer);
parent = atk_object_get_parent (ATK_OBJECT (text));
if (GAIL_IS_CONTAINER_CELL (parent))
parent = atk_object_get_parent (parent);
g_return_val_if_fail (GAIL_IS_CELL_PARENT (parent), NULL);
widget = GTK_ACCESSIBLE (parent)->widget;
layout = create_pango_layout (gtk_renderer, widget),
attrib_set = gail_misc_layout_get_run_attributes (attrib_set,
layout,
gtk_renderer->text,
offset,
start_offset,
end_offset);
g_object_unref (G_OBJECT (layout));
return attrib_set;
}
static AtkAttributeSet*
gail_text_cell_get_default_attributes (AtkText *text)
{
GailRendererCell *gail_renderer;
GtkCellRendererText *gtk_renderer;
AtkAttributeSet *attrib_set = NULL;
PangoLayout *layout;
AtkObject *parent;
GtkWidget *widget;
gail_renderer = GAIL_RENDERER_CELL (text);
gtk_renderer = GTK_CELL_RENDERER_TEXT (gail_renderer->renderer);
parent = atk_object_get_parent (ATK_OBJECT (text));
if (GAIL_IS_CONTAINER_CELL (parent))
parent = atk_object_get_parent (parent);
g_return_val_if_fail (GAIL_IS_CELL_PARENT (parent), NULL);
widget = GTK_ACCESSIBLE (parent)->widget;
layout = create_pango_layout (gtk_renderer, widget),
attrib_set = gail_misc_get_default_attributes (attrib_set,
layout,
widget);
g_object_unref (G_OBJECT (layout));
return attrib_set;
}
/*
* This function is used by gail_text_cell_get_offset_at_point()
* and gail_text_cell_get_character_extents(). There is no
* cached PangoLayout for gailtextcell so we must create a temporary
* one using this function.
*/
static PangoLayout*
create_pango_layout(GtkCellRendererText *gtk_renderer,
GtkWidget *widget)
{
PangoAttrList *attr_list;
PangoLayout *layout;
PangoUnderline uline;
PangoFontMask mask;
layout = gtk_widget_create_pango_layout (widget, gtk_renderer->text);
if (gtk_renderer->extra_attrs)
attr_list = pango_attr_list_copy (gtk_renderer->extra_attrs);
else
attr_list = pango_attr_list_new ();
if (gtk_renderer->foreground_set)
{
PangoColor color;
color = gtk_renderer->foreground;
add_attr (attr_list, pango_attr_foreground_new (color.red,
color.green, color.blue));
}
if (gtk_renderer->strikethrough_set)
add_attr (attr_list,
pango_attr_strikethrough_new (gtk_renderer->strikethrough));
mask = pango_font_description_get_set_fields (gtk_renderer->font);
if (mask & PANGO_FONT_MASK_FAMILY)
add_attr (attr_list,
pango_attr_family_new (pango_font_description_get_family (gtk_renderer->font)));
if (mask & PANGO_FONT_MASK_STYLE)
add_attr (attr_list, pango_attr_style_new (pango_font_description_get_style (gtk_renderer->font)));
if (mask & PANGO_FONT_MASK_VARIANT)
add_attr (attr_list, pango_attr_variant_new (pango_font_description_get_variant (gtk_renderer->font)));
if (mask & PANGO_FONT_MASK_WEIGHT)
add_attr (attr_list, pango_attr_weight_new (pango_font_description_get_weight (gtk_renderer->font)));
if (mask & PANGO_FONT_MASK_STRETCH)
add_attr (attr_list, pango_attr_stretch_new (pango_font_description_get_stretch (gtk_renderer->font)));
if (mask & PANGO_FONT_MASK_SIZE)
add_attr (attr_list, pango_attr_size_new (pango_font_description_get_size (gtk_renderer->font)));
if (gtk_renderer->scale_set &&
gtk_renderer->font_scale != 1.0)
add_attr (attr_list, pango_attr_scale_new (gtk_renderer->font_scale));
if (gtk_renderer->underline_set)
uline = gtk_renderer->underline_style;
else
uline = PANGO_UNDERLINE_NONE;
if (uline != PANGO_UNDERLINE_NONE)
add_attr (attr_list,
pango_attr_underline_new (gtk_renderer->underline_style));
if (gtk_renderer->rise_set)
add_attr (attr_list, pango_attr_rise_new (gtk_renderer->rise));
pango_layout_set_attributes (layout, attr_list);
pango_layout_set_width (layout, -1);
pango_attr_list_unref (attr_list);
return layout;
}
static void
add_attr (PangoAttrList *attr_list,
PangoAttribute *attr)
{
attr->start_index = 0;
attr->end_index = G_MAXINT;
pango_attr_list_insert (attr_list, attr);
}
static void
gail_text_cell_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords)
{
GailRendererCell *gail_renderer;
GtkCellRendererText *gtk_renderer;
GdkRectangle rendered_rect;
GtkWidget *widget;
AtkObject *parent;
PangoRectangle char_rect;
PangoLayout *layout;
gint x_offset, y_offset, index, cell_height, cell_width;
if (!GAIL_TEXT_CELL (text)->cell_text)
{
*x = *y = *height = *width = 0;
return;
}
if (offset < 0 || offset >= GAIL_TEXT_CELL (text)->cell_length)
{
*x = *y = *height = *width = 0;
return;
}
gail_renderer = GAIL_RENDERER_CELL (text);
gtk_renderer = GTK_CELL_RENDERER_TEXT (gail_renderer->renderer);
/*
* Thus would be inconsistent with the cache
*/
gail_return_if_fail (gtk_renderer->text);
parent = atk_object_get_parent (ATK_OBJECT (text));
if (GAIL_IS_CONTAINER_CELL (parent))
parent = atk_object_get_parent (parent);
widget = GTK_ACCESSIBLE (parent)->widget;
g_return_if_fail (GAIL_IS_CELL_PARENT (parent));
gail_cell_parent_get_cell_area (GAIL_CELL_PARENT (parent), GAIL_CELL (text),
&rendered_rect);
gtk_cell_renderer_get_size (GTK_CELL_RENDERER (gtk_renderer), widget,
&rendered_rect, &x_offset, &y_offset, &cell_width, &cell_height);
layout = create_pango_layout (gtk_renderer, widget);
index = g_utf8_offset_to_pointer (gtk_renderer->text,
offset) - gtk_renderer->text;
pango_layout_index_to_pos (layout, index, &char_rect);
gail_misc_get_extents_from_pango_rectangle (widget,
&char_rect,
x_offset + rendered_rect.x + gail_renderer->renderer->xpad,
y_offset + rendered_rect.y + gail_renderer->renderer->ypad,
x, y, width, height, coords);
g_object_unref (layout);
return;
}
static gint
gail_text_cell_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords)
{
AtkObject *parent;
GailRendererCell *gail_renderer;
GtkCellRendererText *gtk_renderer;
GtkWidget *widget;
GdkRectangle rendered_rect;
PangoLayout *layout;
gint x_offset, y_offset, index;
if (!GAIL_TEXT_CELL (text)->cell_text)
return -1;
gail_renderer = GAIL_RENDERER_CELL (text);
gtk_renderer = GTK_CELL_RENDERER_TEXT (gail_renderer->renderer);
parent = atk_object_get_parent (ATK_OBJECT (text));
g_return_val_if_fail (gtk_renderer->text, -1);
if (GAIL_IS_CONTAINER_CELL (parent))
parent = atk_object_get_parent (parent);
widget = GTK_ACCESSIBLE (parent)->widget;
g_return_val_if_fail (GAIL_IS_CELL_PARENT (parent), -1);
gail_cell_parent_get_cell_area (GAIL_CELL_PARENT (parent), GAIL_CELL (text),
&rendered_rect);
gtk_cell_renderer_get_size (GTK_CELL_RENDERER (gtk_renderer), widget,
&rendered_rect, &x_offset, &y_offset, NULL, NULL);
layout = create_pango_layout (gtk_renderer, widget);
index = gail_misc_get_index_at_point_in_layout (widget, layout,
x_offset + rendered_rect.x + gail_renderer->renderer->xpad,
y_offset + rendered_rect.y + gail_renderer->renderer->ypad,
x, y, coords);
g_object_unref (layout);
if (index == -1)
{
if (coords == ATK_XY_WINDOW || coords == ATK_XY_SCREEN)
return g_utf8_strlen (gtk_renderer->text, -1);
return index;
}
else
return g_utf8_pointer_to_offset (gtk_renderer->text,
gtk_renderer->text + index);
}
static gunichar
gail_text_cell_get_character_at_offset (AtkText *text,
gint offset)
{
gchar *index;
gchar *string;
string = GAIL_TEXT_CELL(text)->cell_text;
if (!string)
return '\0';
if (offset >= g_utf8_strlen (string, -1))
return '\0';
index = g_utf8_offset_to_pointer (string, offset);
return g_utf8_get_char (index);
}