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mutter/clutter/cally/cally-text.c
Alejandro Piñeiro a92e29d923 a11y: removed implementation notes comment from CallyText 
Part of those notes were outdated. The other part is irrelevant
or has a bug assigned.
2012-12-10 18:09:06 +01:00

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/* CALLY - The Clutter Accessibility Implementation Library
*
* Copyright (C) 2009 Igalia, S.L.
*
* Author: Alejandro Piñeiro Iglesias <apinheiro@igalia.com>
*
* Some parts are based on GailLabel, GailEntry, GailTextView from GAIL
* GAIL - The GNOME Accessibility Implementation Library
* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
*
* Implementation of atk_text_get_text_[before/at/after]_offset
* copied from gtkpango.c, part of GTK+ project
* Copyright (c) 2010 Red Hat, 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.
*/
/**
* SECTION:cally-text
* @short_description: Implementation of the ATK interfaces for a #ClutterText
* @see_also: #ClutterText
*
* #CallyText implements the required ATK interfaces of
* #ClutterText, #AtkText and #AtkEditableText
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cally-text.h"
#include "cally-actor-private.h"
#include "clutter-main.h"
static void cally_text_finalize (GObject *obj);
/* AtkObject */
static void cally_text_real_initialize (AtkObject *obj,
gpointer data);
static AtkStateSet* cally_text_ref_state_set (AtkObject *obj);
/* atkaction */
static void _cally_text_activate_action (CallyActor *cally_actor);
static void _check_activate_action (CallyText *cally_text,
ClutterText *clutter_text);
/* AtkText */
static void cally_text_text_interface_init (AtkTextIface *iface);
static gchar* cally_text_get_text (AtkText *text,
gint start_offset,
gint end_offset);
static gunichar cally_text_get_character_at_offset (AtkText *text,
gint offset);
static gchar* cally_text_get_text_before_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gchar* cally_text_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gchar* cally_text_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gint cally_text_get_caret_offset (AtkText *text);
static gboolean cally_text_set_caret_offset (AtkText *text,
gint offset);
static gint cally_text_get_character_count (AtkText *text);
static gint cally_text_get_n_selections (AtkText *text);
static gchar* cally_text_get_selection (AtkText *text,
gint selection_num,
gint *start_offset,
gint *end_offset);
static gboolean cally_text_add_selection (AtkText *text,
gint start_offset,
gint end_offset);
static gboolean cally_text_remove_selection (AtkText *text,
gint selection_num);
static gboolean cally_text_set_selection (AtkText *text,
gint selection_num,
gint start_offset,
gint end_offset);
static AtkAttributeSet* cally_text_get_run_attributes (AtkText *text,
gint offset,
gint *start_offset,
gint *end_offset);
static AtkAttributeSet* cally_text_get_default_attributes (AtkText *text);
static void cally_text_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords);
static gint cally_text_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords);
static void _cally_text_get_selection_bounds (ClutterText *clutter_text,
gint *start_offset,
gint *end_offset);
static void _cally_text_insert_text_cb (ClutterText *clutter_text,
gchar *new_text,
gint new_text_length,
gint *position,
gpointer data);
static void _cally_text_delete_text_cb (ClutterText *clutter_text,
gint start_pos,
gint end_pos,
gpointer data);
static gboolean _idle_notify_insert (gpointer data);
static void _notify_insert (CallyText *cally_text);
static void _notify_delete (CallyText *cally_text);
/* AtkEditableText */
static void cally_text_editable_text_interface_init (AtkEditableTextIface *iface);
static void cally_text_set_text_contents (AtkEditableText *text,
const gchar *string);
static void cally_text_insert_text (AtkEditableText *text,
const gchar *string,
gint length,
gint *position);
static void cally_text_delete_text (AtkEditableText *text,
gint start_pos,
gint end_pos);
/* CallyActor */
static void cally_text_notify_clutter (GObject *obj,
GParamSpec *pspec);
static gboolean _check_for_selection_change (CallyText *cally_text,
ClutterText *clutter_text);
/* Misc functions */
static AtkAttributeSet* _cally_misc_add_attribute (AtkAttributeSet *attrib_set,
AtkTextAttribute attr,
gchar *value);
static AtkAttributeSet* _cally_misc_layout_get_run_attributes (AtkAttributeSet *attrib_set,
ClutterText *clutter_text,
gint offset,
gint *start_offset,
gint *end_offset);
static AtkAttributeSet* _cally_misc_layout_get_default_attributes (AtkAttributeSet *attrib_set,
ClutterText *text);
static int _cally_misc_get_index_at_point (ClutterText *clutter_text,
gint x,
gint y,
AtkCoordType coords);
G_DEFINE_TYPE_WITH_CODE (CallyText,
cally_text,
CALLY_TYPE_ACTOR,
G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT,
cally_text_text_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_EDITABLE_TEXT,
cally_text_editable_text_interface_init));
#define CALLY_TEXT_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), CALLY_TYPE_TEXT, CallyTextPrivate))
struct _CallyTextPrivate
{
/* Cached ClutterText values*/
gint cursor_position;
gint selection_bound;
/* text_changed::insert stuff */
const gchar *signal_name_insert;
gint position_insert;
gint length_insert;
guint insert_idle_handler;
/* text_changed::delete stuff */
const gchar *signal_name_delete;
gint position_delete;
gint length_delete;
/* action */
guint activate_action_id;
};
static void
cally_text_class_init (CallyTextClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
CallyActorClass *cally_class = CALLY_ACTOR_CLASS (klass);
gobject_class->finalize = cally_text_finalize;
class->initialize = cally_text_real_initialize;
class->ref_state_set = cally_text_ref_state_set;
cally_class->notify_clutter = cally_text_notify_clutter;
g_type_class_add_private (gobject_class, sizeof (CallyTextPrivate));
}
static void
cally_text_init (CallyText *cally_text)
{
CallyTextPrivate *priv = CALLY_TEXT_GET_PRIVATE (cally_text);
cally_text->priv = priv;
priv->cursor_position = 0;
priv->selection_bound = 0;
priv->signal_name_insert = NULL;
priv->position_insert = -1;
priv->length_insert = -1;
priv->insert_idle_handler = 0;
priv->signal_name_delete = NULL;
priv->position_delete = -1;
priv->length_delete = -1;
priv->activate_action_id = 0;
}
static void
cally_text_finalize (GObject *obj)
{
CallyText *cally_text = CALLY_TEXT (obj);
/* g_object_unref (cally_text->priv->textutil); */
/* cally_text->priv->textutil = NULL; */
if (cally_text->priv->insert_idle_handler)
{
g_source_remove (cally_text->priv->insert_idle_handler);
cally_text->priv->insert_idle_handler = 0;
}
G_OBJECT_CLASS (cally_text_parent_class)->finalize (obj);
}
/**
* cally_text_new:
* @actor: a #ClutterActor
*
* Creates a new #CallyText for the given @actor. @actor must be a
* #ClutterText.
*
* Return value: the newly created #AtkObject
*
* Since: 1.4
*/
AtkObject*
cally_text_new (ClutterActor *actor)
{
GObject *object = NULL;
AtkObject *accessible = NULL;
g_return_val_if_fail (CLUTTER_IS_TEXT (actor), NULL);
object = g_object_new (CALLY_TYPE_TEXT, NULL);
accessible = ATK_OBJECT (object);
atk_object_initialize (accessible, actor);
return accessible;
}
/* atkobject.h */
static void
cally_text_real_initialize(AtkObject *obj,
gpointer data)
{
ClutterText *clutter_text = NULL;
CallyText *cally_text = NULL;
ATK_OBJECT_CLASS (cally_text_parent_class)->initialize (obj, data);
g_return_if_fail (CLUTTER_TEXT (data));
cally_text = CALLY_TEXT (obj);
clutter_text = CLUTTER_TEXT (data);
cally_text->priv->cursor_position = clutter_text_get_cursor_position (clutter_text);
cally_text->priv->selection_bound = clutter_text_get_selection_bound (clutter_text);
g_signal_connect (clutter_text, "insert-text",
G_CALLBACK (_cally_text_insert_text_cb),
cally_text);
g_signal_connect (clutter_text, "delete-text",
G_CALLBACK (_cally_text_delete_text_cb),
cally_text);
_check_activate_action (cally_text, clutter_text);
if (clutter_text_get_password_char (clutter_text) != 0)
obj->role = ATK_ROLE_PASSWORD_TEXT;
else
obj->role = ATK_ROLE_TEXT;
}
static AtkStateSet*
cally_text_ref_state_set (AtkObject *obj)
{
AtkStateSet *result = NULL;
ClutterActor *actor = NULL;
result = ATK_OBJECT_CLASS (cally_text_parent_class)->ref_state_set (obj);
actor = CALLY_GET_CLUTTER_ACTOR (obj);
if (actor == NULL)
return result;
if (clutter_text_get_editable (CLUTTER_TEXT (actor)))
atk_state_set_add_state (result, ATK_STATE_EDITABLE);
if (clutter_text_get_selectable (CLUTTER_TEXT (actor)))
atk_state_set_add_state (result, ATK_STATE_SELECTABLE_TEXT);
return result;
}
/***** pango stuff ****
*
* FIXME: all this pango related code used to implement
* atk_text_get_text_[before/at/after]_offset was copied from GTK, and
* should be on a common library (like pango itself).
*
*********************/
/*
* _gtk_pango_move_chars:
* @layout: a #PangoLayout
* @offset: a character offset in @layout
* @count: the number of characters to move from @offset
*
* Returns the position that is @count characters from the
* given @offset. @count may be positive or negative.
*
* For the purpose of this function, characters are defined
* by what Pango considers cursor positions.
*
* Returns: the new position
*/
static gint
_gtk_pango_move_chars (PangoLayout *layout,
gint offset,
gint count)
{
const PangoLogAttr *attrs;
gint n_attrs;
attrs = pango_layout_get_log_attrs_readonly (layout, &n_attrs);
while (count > 0 && offset < n_attrs - 1)
{
do
offset++;
while (offset < n_attrs - 1 && !attrs[offset].is_cursor_position);
count--;
}
while (count < 0 && offset > 0)
{
do
offset--;
while (offset > 0 && !attrs[offset].is_cursor_position);
count++;
}
return offset;
}
/*
* _gtk_pango_move_words:
* @layout: a #PangoLayout
* @offset: a character offset in @layout
* @count: the number of words to move from @offset
*
* Returns the position that is @count words from the
* given @offset. @count may be positive or negative.
*
* If @count is positive, the returned position will
* be a word end, otherwise it will be a word start.
* See the Pango documentation for details on how
* word starts and ends are defined.
*
* Returns: the new position
*/
static gint
_gtk_pango_move_words (PangoLayout *layout,
gint offset,
gint count)
{
const PangoLogAttr *attrs;
gint n_attrs;
attrs = pango_layout_get_log_attrs_readonly (layout, &n_attrs);
while (count > 0 && offset < n_attrs - 1)
{
do
offset++;
while (offset < n_attrs - 1 && !attrs[offset].is_word_end);
count--;
}
while (count < 0 && offset > 0)
{
do
offset--;
while (offset > 0 && !attrs[offset].is_word_start);
count++;
}
return offset;
}
/*
* _gtk_pango_move_sentences:
* @layout: a #PangoLayout
* @offset: a character offset in @layout
* @count: the number of sentences to move from @offset
*
* Returns the position that is @count sentences from the
* given @offset. @count may be positive or negative.
*
* If @count is positive, the returned position will
* be a sentence end, otherwise it will be a sentence start.
* See the Pango documentation for details on how
* sentence starts and ends are defined.
*
* Returns: the new position
*/
static gint
_gtk_pango_move_sentences (PangoLayout *layout,
gint offset,
gint count)
{
const PangoLogAttr *attrs;
gint n_attrs;
attrs = pango_layout_get_log_attrs_readonly (layout, &n_attrs);
while (count > 0 && offset < n_attrs - 1)
{
do
offset++;
while (offset < n_attrs - 1 && !attrs[offset].is_sentence_end);
count--;
}
while (count < 0 && offset > 0)
{
do
offset--;
while (offset > 0 && !attrs[offset].is_sentence_start);
count++;
}
return offset;
}
/*
* _gtk_pango_is_inside_word:
* @layout: a #PangoLayout
* @offset: a character offset in @layout
*
* Returns whether the given position is inside
* a word.
*
* Returns: %TRUE if @offset is inside a word
*/
static gboolean
_gtk_pango_is_inside_word (PangoLayout *layout,
gint offset)
{
const PangoLogAttr *attrs;
gint n_attrs;
attrs = pango_layout_get_log_attrs_readonly (layout, &n_attrs);
while (offset >= 0 &&
!(attrs[offset].is_word_start || attrs[offset].is_word_end))
offset--;
if (offset >= 0)
return attrs[offset].is_word_start;
return FALSE;
}
/*
* _gtk_pango_is_inside_sentence:
* @layout: a #PangoLayout
* @offset: a character offset in @layout
*
* Returns whether the given position is inside
* a sentence.
*
* Returns: %TRUE if @offset is inside a sentence
*/
static gboolean
_gtk_pango_is_inside_sentence (PangoLayout *layout,
gint offset)
{
const PangoLogAttr *attrs;
gint n_attrs;
attrs = pango_layout_get_log_attrs_readonly (layout, &n_attrs);
while (offset >= 0 &&
!(attrs[offset].is_sentence_start || attrs[offset].is_sentence_end))
offset--;
if (offset >= 0)
return attrs[offset].is_sentence_start;
return FALSE;
}
static void
pango_layout_get_line_before (PangoLayout *layout,
AtkTextBoundary boundary_type,
gint offset,
gint *start_offset,
gint *end_offset)
{
PangoLayoutIter *iter;
PangoLayoutLine *line, *prev_line = NULL, *prev_prev_line = NULL;
gint index, start_index, end_index;
const gchar *text;
gboolean found = FALSE;
text = pango_layout_get_text (layout);
index = g_utf8_offset_to_pointer (text, offset) - text;
iter = pango_layout_get_iter (layout);
do
{
line = pango_layout_iter_get_line (iter);
start_index = line->start_index;
end_index = start_index + line->length;
if (index >= start_index && index <= end_index)
{
/* Found line for offset */
if (prev_line)
{
switch (boundary_type)
{
case ATK_TEXT_BOUNDARY_LINE_START:
end_index = start_index;
start_index = prev_line->start_index;
break;
case ATK_TEXT_BOUNDARY_LINE_END:
if (prev_prev_line)
start_index = prev_prev_line->start_index + prev_prev_line->length;
else
start_index = 0;
end_index = prev_line->start_index + prev_line->length;
break;
default:
g_assert_not_reached();
}
}
else
start_index = end_index = 0;
found = TRUE;
break;
}
prev_prev_line = prev_line;
prev_line = line;
}
while (pango_layout_iter_next_line (iter));
if (!found)
{
start_index = prev_line->start_index + prev_line->length;
end_index = start_index;
}
pango_layout_iter_free (iter);
*start_offset = g_utf8_pointer_to_offset (text, text + start_index);
*end_offset = g_utf8_pointer_to_offset (text, text + end_index);
}
static void
pango_layout_get_line_at (PangoLayout *layout,
AtkTextBoundary boundary_type,
gint offset,
gint *start_offset,
gint *end_offset)
{
PangoLayoutIter *iter;
PangoLayoutLine *line, *prev_line = NULL;
gint index, start_index, end_index;
const gchar *text;
gboolean found = FALSE;
text = pango_layout_get_text (layout);
index = g_utf8_offset_to_pointer (text, offset) - text;
iter = pango_layout_get_iter (layout);
do
{
line = pango_layout_iter_get_line (iter);
start_index = line->start_index;
end_index = start_index + line->length;
if (index >= start_index && index <= end_index)
{
/* Found line for offset */
switch (boundary_type)
{
case ATK_TEXT_BOUNDARY_LINE_START:
if (pango_layout_iter_next_line (iter))
end_index = pango_layout_iter_get_line (iter)->start_index;
break;
case ATK_TEXT_BOUNDARY_LINE_END:
if (prev_line)
start_index = prev_line->start_index + prev_line->length;
break;
default:
g_assert_not_reached();
}
found = TRUE;
break;
}
prev_line = line;
}
while (pango_layout_iter_next_line (iter));
if (!found)
{
start_index = prev_line->start_index + prev_line->length;
end_index = start_index;
}
pango_layout_iter_free (iter);
*start_offset = g_utf8_pointer_to_offset (text, text + start_index);
*end_offset = g_utf8_pointer_to_offset (text, text + end_index);
}
static void
pango_layout_get_line_after (PangoLayout *layout,
AtkTextBoundary boundary_type,
gint offset,
gint *start_offset,
gint *end_offset)
{
PangoLayoutIter *iter;
PangoLayoutLine *line, *prev_line = NULL;
gint index, start_index, end_index;
const gchar *text;
gboolean found = FALSE;
text = pango_layout_get_text (layout);
index = g_utf8_offset_to_pointer (text, offset) - text;
iter = pango_layout_get_iter (layout);
do
{
line = pango_layout_iter_get_line (iter);
start_index = line->start_index;
end_index = start_index + line->length;
if (index >= start_index && index <= end_index)
{
/* Found line for offset */
if (pango_layout_iter_next_line (iter))
{
line = pango_layout_iter_get_line (iter);
switch (boundary_type)
{
case ATK_TEXT_BOUNDARY_LINE_START:
start_index = line->start_index;
if (pango_layout_iter_next_line (iter))
end_index = pango_layout_iter_get_line (iter)->start_index;
else
end_index = start_index + line->length;
break;
case ATK_TEXT_BOUNDARY_LINE_END:
start_index = end_index;
end_index = line->start_index + line->length;
break;
default:
g_assert_not_reached();
}
}
else
start_index = end_index;
found = TRUE;
break;
}
prev_line = line;
}
while (pango_layout_iter_next_line (iter));
if (!found)
{
start_index = prev_line->start_index + prev_line->length;
end_index = start_index;
}
pango_layout_iter_free (iter);
*start_offset = g_utf8_pointer_to_offset (text, text + start_index);
*end_offset = g_utf8_pointer_to_offset (text, text + end_index);
}
/*
* _gtk_pango_get_text_at:
* @layout: a #PangoLayout
* @boundary_type: a #AtkTextBoundary
* @offset: a character offset in @layout
* @start_offset: return location for the start of the returned text
* @end_offset: return location for the end of the return text
*
* Gets a slice of the text from @layout at @offset.
*
* The @boundary_type determines the size of the returned slice of
* text. For the exact semantics of this function, see
* atk_text_get_text_after_offset().
*
* Returns: a newly allocated string containing a slice of text
* from layout. Free with g_free().
*/
static gchar *
_gtk_pango_get_text_at (PangoLayout *layout,
AtkTextBoundary boundary_type,
gint offset,
gint *start_offset,
gint *end_offset)
{
const gchar *text;
gint start, end;
const PangoLogAttr *attrs;
gint n_attrs;
text = pango_layout_get_text (layout);
if (text[0] == 0)
{
*start_offset = 0;
*end_offset = 0;
return g_strdup ("");
}
attrs = pango_layout_get_log_attrs_readonly (layout, &n_attrs);
start = offset;
end = start;
switch (boundary_type)
{
case ATK_TEXT_BOUNDARY_CHAR:
end = _gtk_pango_move_chars (layout, end, 1);
break;
case ATK_TEXT_BOUNDARY_WORD_START:
if (!attrs[start].is_word_start)
start = _gtk_pango_move_words (layout, start, -1);
if (_gtk_pango_is_inside_word (layout, end))
end = _gtk_pango_move_words (layout, end, 1);
while (!attrs[end].is_word_start && end < n_attrs - 1)
end = _gtk_pango_move_chars (layout, end, 1);
break;
case ATK_TEXT_BOUNDARY_WORD_END:
if (_gtk_pango_is_inside_word (layout, start) &&
!attrs[start].is_word_start)
start = _gtk_pango_move_words (layout, start, -1);
while (!attrs[start].is_word_end && start > 0)
start = _gtk_pango_move_chars (layout, start, -1);
end = _gtk_pango_move_words (layout, end, 1);
break;
case ATK_TEXT_BOUNDARY_SENTENCE_START:
if (!attrs[start].is_sentence_start)
start = _gtk_pango_move_sentences (layout, start, -1);
if (_gtk_pango_is_inside_sentence (layout, end))
end = _gtk_pango_move_sentences (layout, end, 1);
while (!attrs[end].is_sentence_start && end < n_attrs - 1)
end = _gtk_pango_move_chars (layout, end, 1);
break;
case ATK_TEXT_BOUNDARY_SENTENCE_END:
if (_gtk_pango_is_inside_sentence (layout, start) &&
!attrs[start].is_sentence_start)
start = _gtk_pango_move_sentences (layout, start, -1);
while (!attrs[start].is_sentence_end && start > 0)
start = _gtk_pango_move_chars (layout, start, -1);
end = _gtk_pango_move_sentences (layout, end, 1);
break;
case ATK_TEXT_BOUNDARY_LINE_START:
case ATK_TEXT_BOUNDARY_LINE_END:
pango_layout_get_line_at (layout, boundary_type, offset, &start, &end);
break;
}
*start_offset = start;
*end_offset = end;
g_assert (start <= end);
return g_utf8_substring (text, start, end);
}
/*
* _gtk_pango_get_text_before:
* @layout: a #PangoLayout
* @boundary_type: a #AtkTextBoundary
* @offset: a character offset in @layout
* @start_offset: return location for the start of the returned text
* @end_offset: return location for the end of the return text
*
* Gets a slice of the text from @layout before @offset.
*
* The @boundary_type determines the size of the returned slice of
* text. For the exact semantics of this function, see
* atk_text_get_text_before_offset().
*
* Returns: a newly allocated string containing a slice of text
* from layout. Free with g_free().
*/
static gchar *
_gtk_pango_get_text_before (PangoLayout *layout,
AtkTextBoundary boundary_type,
gint offset,
gint *start_offset,
gint *end_offset)
{
const gchar *text;
gint start, end;
const PangoLogAttr *attrs;
gint n_attrs;
text = pango_layout_get_text (layout);
if (text[0] == 0)
{
*start_offset = 0;
*end_offset = 0;
return g_strdup ("");
}
attrs = pango_layout_get_log_attrs_readonly (layout, &n_attrs);
start = offset;
end = start;
switch (boundary_type)
{
case ATK_TEXT_BOUNDARY_CHAR:
start = _gtk_pango_move_chars (layout, start, -1);
break;
case ATK_TEXT_BOUNDARY_WORD_START:
if (!attrs[start].is_word_start)
start = _gtk_pango_move_words (layout, start, -1);
end = start;
start = _gtk_pango_move_words (layout, start, -1);
break;
case ATK_TEXT_BOUNDARY_WORD_END:
if (_gtk_pango_is_inside_word (layout, start) &&
!attrs[start].is_word_start)
start = _gtk_pango_move_words (layout, start, -1);
while (!attrs[start].is_word_end && start > 0)
start = _gtk_pango_move_chars (layout, start, -1);
end = start;
start = _gtk_pango_move_words (layout, start, -1);
while (!attrs[start].is_word_end && start > 0)
start = _gtk_pango_move_chars (layout, start, -1);
break;
case ATK_TEXT_BOUNDARY_SENTENCE_START:
if (!attrs[start].is_sentence_start)
start = _gtk_pango_move_sentences (layout, start, -1);
end = start;
start = _gtk_pango_move_sentences (layout, start, -1);
break;
case ATK_TEXT_BOUNDARY_SENTENCE_END:
if (_gtk_pango_is_inside_sentence (layout, start) &&
!attrs[start].is_sentence_start)
start = _gtk_pango_move_sentences (layout, start, -1);
while (!attrs[start].is_sentence_end && start > 0)
start = _gtk_pango_move_chars (layout, start, -1);
end = start;
start = _gtk_pango_move_sentences (layout, start, -1);
while (!attrs[start].is_sentence_end && start > 0)
start = _gtk_pango_move_chars (layout, start, -1);
break;
case ATK_TEXT_BOUNDARY_LINE_START:
case ATK_TEXT_BOUNDARY_LINE_END:
pango_layout_get_line_before (layout, boundary_type, offset, &start, &end);
break;
}
*start_offset = start;
*end_offset = end;
g_assert (start <= end);
return g_utf8_substring (text, start, end);
}
/*
* _gtk_pango_get_text_after:
* @layout: a #PangoLayout
* @boundary_type: a #AtkTextBoundary
* @offset: a character offset in @layout
* @start_offset: return location for the start of the returned text
* @end_offset: return location for the end of the return text
*
* Gets a slice of the text from @layout after @offset.
*
* The @boundary_type determines the size of the returned slice of
* text. For the exact semantics of this function, see
* atk_text_get_text_after_offset().
*
* Returns: a newly allocated string containing a slice of text
* from layout. Free with g_free().
*/
static gchar *
_gtk_pango_get_text_after (PangoLayout *layout,
AtkTextBoundary boundary_type,
gint offset,
gint *start_offset,
gint *end_offset)
{
const gchar *text;
gint start, end;
const PangoLogAttr *attrs;
gint n_attrs;
text = pango_layout_get_text (layout);
if (text[0] == 0)
{
*start_offset = 0;
*end_offset = 0;
return g_strdup ("");
}
attrs = pango_layout_get_log_attrs_readonly (layout, &n_attrs);
start = offset;
end = start;
switch (boundary_type)
{
case ATK_TEXT_BOUNDARY_CHAR:
start = _gtk_pango_move_chars (layout, start, 1);
end = start;
end = _gtk_pango_move_chars (layout, end, 1);
break;
case ATK_TEXT_BOUNDARY_WORD_START:
if (_gtk_pango_is_inside_word (layout, end))
end = _gtk_pango_move_words (layout, end, 1);
while (!attrs[end].is_word_start && end < n_attrs - 1)
end = _gtk_pango_move_chars (layout, end, 1);
start = end;
if (end < n_attrs - 1)
{
end = _gtk_pango_move_words (layout, end, 1);
while (!attrs[end].is_word_start && end < n_attrs - 1)
end = _gtk_pango_move_chars (layout, end, 1);
}
break;
case ATK_TEXT_BOUNDARY_WORD_END:
end = _gtk_pango_move_words (layout, end, 1);
start = end;
if (end < n_attrs - 1)
end = _gtk_pango_move_words (layout, end, 1);
break;
case ATK_TEXT_BOUNDARY_SENTENCE_START:
if (_gtk_pango_is_inside_sentence (layout, end))
end = _gtk_pango_move_sentences (layout, end, 1);
while (!attrs[end].is_sentence_start && end < n_attrs - 1)
end = _gtk_pango_move_chars (layout, end, 1);
start = end;
if (end < n_attrs - 1)
{
end = _gtk_pango_move_sentences (layout, end, 1);
while (!attrs[end].is_sentence_start && end < n_attrs - 1)
end = _gtk_pango_move_chars (layout, end, 1);
}
break;
case ATK_TEXT_BOUNDARY_SENTENCE_END:
end = _gtk_pango_move_sentences (layout, end, 1);
start = end;
if (end < n_attrs - 1)
end = _gtk_pango_move_sentences (layout, end, 1);
break;
case ATK_TEXT_BOUNDARY_LINE_START:
case ATK_TEXT_BOUNDARY_LINE_END:
pango_layout_get_line_after (layout, boundary_type, offset, &start, &end);
break;
}
*start_offset = start;
*end_offset = end;
g_assert (start <= end);
return g_utf8_substring (text, start, end);
}
/***** atktext.h ******/
static void
cally_text_text_interface_init (AtkTextIface *iface)
{
g_return_if_fail (iface != NULL);
iface->get_text = cally_text_get_text;
iface->get_character_at_offset = cally_text_get_character_at_offset;
iface->get_text_before_offset = cally_text_get_text_before_offset;
iface->get_text_at_offset = cally_text_get_text_at_offset;
iface->get_text_after_offset = cally_text_get_text_after_offset;
iface->get_character_count = cally_text_get_character_count;
iface->get_caret_offset = cally_text_get_caret_offset;
iface->set_caret_offset = cally_text_set_caret_offset;
iface->get_n_selections = cally_text_get_n_selections;
iface->get_selection = cally_text_get_selection;
iface->add_selection = cally_text_add_selection;
iface->remove_selection = cally_text_remove_selection;
iface->set_selection = cally_text_set_selection;
iface->get_run_attributes = cally_text_get_run_attributes;
iface->get_default_attributes = cally_text_get_default_attributes;
iface->get_character_extents = cally_text_get_character_extents;
iface->get_offset_at_point = cally_text_get_offset_at_point;
}
static gchar*
cally_text_get_text (AtkText *text,
gint start_offset,
gint end_offset)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* Object is defunct */
return NULL;
return clutter_text_get_chars (CLUTTER_TEXT (actor),
start_offset, end_offset);
}
static gunichar
cally_text_get_character_at_offset (AtkText *text,
gint offset)
{
ClutterActor *actor = NULL;
gchar *string = NULL;
gchar *index = NULL;
gunichar unichar;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return '\0';
string = clutter_text_get_chars (CLUTTER_TEXT (actor), 0, -1);
if (offset >= g_utf8_strlen (string, -1))
{
unichar = '\0';
}
else
{
index = g_utf8_offset_to_pointer (string, offset);
unichar = g_utf8_get_char(index);
}
g_free(string);
return unichar;
}
static gchar*
cally_text_get_text_before_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return NULL;
return _gtk_pango_get_text_before (clutter_text_get_layout (CLUTTER_TEXT (actor)),
boundary_type, offset,
start_offset, end_offset);
}
static gchar*
cally_text_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return NULL;
return _gtk_pango_get_text_at (clutter_text_get_layout (CLUTTER_TEXT (actor)),
boundary_type, offset,
start_offset, end_offset);
}
static gchar*
cally_text_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return NULL;
return _gtk_pango_get_text_after (clutter_text_get_layout (CLUTTER_TEXT (actor)),
boundary_type, offset,
start_offset, end_offset);
}
static gint
cally_text_get_caret_offset (AtkText *text)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return -1;
return clutter_text_get_cursor_position (CLUTTER_TEXT (actor));
}
static gboolean
cally_text_set_caret_offset (AtkText *text,
gint offset)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return FALSE;
clutter_text_set_cursor_position (CLUTTER_TEXT (actor), offset);
/* like in gailentry, we suppose that this always works, as clutter text
doesn't return anything */
return TRUE;
}
static gint
cally_text_get_character_count (AtkText *text)
{
ClutterActor *actor = NULL;
ClutterText *clutter_text = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return 0;
clutter_text = CLUTTER_TEXT (actor);
return g_utf8_strlen (clutter_text_get_text (clutter_text), -1);
}
static gint
cally_text_get_n_selections (AtkText *text)
{
ClutterActor *actor = NULL;
gint selection_bound = -1;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return 0;
if (!clutter_text_get_selectable (CLUTTER_TEXT (actor)))
return 0;
selection_bound = clutter_text_get_selection_bound (CLUTTER_TEXT (actor));
if (selection_bound > 0)
return 1;
else
return 0;
}
static gchar*
cally_text_get_selection (AtkText *text,
gint selection_num,
gint *start_offset,
gint *end_offset)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return NULL;
/* As in gailentry, only let the user get the selection if one is set, and if
* the selection_num is 0.
*/
if (selection_num != 0)
return NULL;
_cally_text_get_selection_bounds (CLUTTER_TEXT (actor), start_offset, end_offset);
if (*start_offset != *end_offset)
return clutter_text_get_selection (CLUTTER_TEXT (actor));
else
return NULL;
}
/* ClutterText only allows one selection. So this method will set the selection
if no selection exists, but as in gailentry, it will not change the current
selection */
static gboolean
cally_text_add_selection (AtkText *text,
gint start_offset,
gint end_offset)
{
ClutterActor *actor;
gint select_start, select_end;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return FALSE;
_cally_text_get_selection_bounds (CLUTTER_TEXT (actor),
&select_start, &select_end);
/* Like in gailentry, if there is already a selection, then don't allow another
* to be added, since ClutterText only supports one selected region.
*/
if (select_start == select_end)
{
clutter_text_set_selection (CLUTTER_TEXT (actor),
start_offset, end_offset);
return TRUE;
}
else
return FALSE;
}
static gboolean
cally_text_remove_selection (AtkText *text,
gint selection_num)
{
ClutterActor *actor = NULL;
gint caret_pos = -1;
gint select_start = -1;
gint select_end = -1;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return FALSE;
/* only one selection is allowed */
if (selection_num != 0)
return FALSE;
_cally_text_get_selection_bounds (CLUTTER_TEXT (actor),
&select_start, &select_end);
if (select_start != select_end)
{
/* Setting the start & end of the selected region to the caret position
* turns off the selection.
*/
caret_pos = clutter_text_get_cursor_position (CLUTTER_TEXT (actor));
clutter_text_set_selection (CLUTTER_TEXT (actor),
caret_pos, caret_pos);
return TRUE;
}
else
return FALSE;
}
static gboolean
cally_text_set_selection (AtkText *text,
gint selection_num,
gint start_offset,
gint end_offset)
{
ClutterActor *actor = NULL;
gint select_start = -1;
gint select_end = -1;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return FALSE;
/* Like in gailentry, only let the user move the selection if one is set,
* and if the selection_num is 0
*/
if (selection_num != 0)
return FALSE;
_cally_text_get_selection_bounds (CLUTTER_TEXT (actor),
&select_start, &select_end);
if (select_start != select_end)
{
clutter_text_set_selection (CLUTTER_TEXT (actor),
start_offset, end_offset);
return TRUE;
}
else
return FALSE;
}
static AtkAttributeSet*
cally_text_get_run_attributes (AtkText *text,
gint offset,
gint *start_offset,
gint *end_offset)
{
ClutterActor *actor = NULL;
ClutterText *clutter_text = NULL;
AtkAttributeSet *at_set = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return NULL;
/* Clutter don't have any reference to the direction*/
clutter_text = CLUTTER_TEXT (actor);
at_set = _cally_misc_layout_get_run_attributes (at_set,
clutter_text,
offset,
start_offset,
end_offset);
return at_set;
}
static AtkAttributeSet*
cally_text_get_default_attributes (AtkText *text)
{
ClutterActor *actor = NULL;
ClutterText *clutter_text = NULL;
AtkAttributeSet *at_set = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return NULL;
clutter_text = CLUTTER_TEXT (actor);
at_set = _cally_misc_layout_get_default_attributes (at_set, clutter_text);
return at_set;
}
static void cally_text_get_character_extents (AtkText *text,
gint offset,
gint *xp,
gint *yp,
gint *widthp,
gint *heightp,
AtkCoordType coords)
{
ClutterActor *actor = NULL;
ClutterText *clutter_text = NULL;
gint x = 0, y = 0, width = 0, height = 0;
gint index, x_window, y_window, x_toplevel, y_toplevel;
gint x_layout, y_layout;
PangoLayout *layout;
PangoRectangle extents;
const gchar *text_value;
ClutterVertex verts[4];
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
goto done;
clutter_text = CLUTTER_TEXT (actor);
text_value = clutter_text_get_text (clutter_text);
index = g_utf8_offset_to_pointer (text_value, offset) - text_value;
layout = clutter_text_get_layout (clutter_text);
pango_layout_index_to_pos (layout, index, &extents);
/* handle RTL text layout */
if (extents.width < 0)
{
extents.x += extents.width;
extents.width = -extents.width;
}
clutter_actor_get_abs_allocation_vertices (actor, verts);
x_window = verts[0].x;
y_window = verts[0].y;
clutter_text_get_layout_offsets (clutter_text, &x_layout, &y_layout);
x = (extents.x / PANGO_SCALE) + x_layout + x_window;
y = (extents.y / PANGO_SCALE) + y_layout + y_window;
width = extents.width / PANGO_SCALE;
height = extents.height / PANGO_SCALE;
if (coords == ATK_XY_SCREEN)
{
_cally_actor_get_top_level_origin (actor, &x_toplevel, &y_toplevel);
x += x_toplevel;
y += y_toplevel;
}
done:
if (widthp)
*widthp = width;
if (heightp)
*heightp = height;
if (xp)
*xp = x;
if (yp)
*yp = y;
}
static gint
cally_text_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords)
{
ClutterActor *actor = NULL;
ClutterText *clutter_text = NULL;
const gchar *text_value;
gint index;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return -1;
clutter_text = CLUTTER_TEXT (actor);
index = _cally_misc_get_index_at_point (clutter_text, x, y, coords);
text_value = clutter_text_get_text (clutter_text);
if (index == -1)
return g_utf8_strlen (text_value, -1);
else
return g_utf8_pointer_to_offset (text_value, text_value + index);
}
/******** Auxiliar private methods ******/
/* ClutterText only maintains the current cursor position and a extra selection
bound, but this could be before or after the cursor. This method returns
the start and end positions in a proper order (so start<=end). This is
similar to the function gtk_editable_get_selection_bounds */
static void
_cally_text_get_selection_bounds (ClutterText *clutter_text,
gint *start_offset,
gint *end_offset)
{
gint pos = -1;
gint selection_bound = -1;
pos = clutter_text_get_cursor_position (clutter_text);
selection_bound = clutter_text_get_selection_bound (clutter_text);
if (pos < selection_bound)
{
*start_offset = pos;
*end_offset = selection_bound;
}
else
{
*start_offset = selection_bound;
*end_offset = pos;
}
}
static void
_cally_text_delete_text_cb (ClutterText *clutter_text,
gint start_pos,
gint end_pos,
gpointer data)
{
CallyText *cally_text = NULL;
g_return_if_fail (CALLY_IS_TEXT (data));
/* Ignore zero lengh deletions */
if (end_pos - start_pos == 0)
return;
cally_text = CALLY_TEXT (data);
if (!cally_text->priv->signal_name_delete)
{
cally_text->priv->signal_name_delete = "text_changed::delete";
cally_text->priv->position_delete = start_pos;
cally_text->priv->length_delete = end_pos - start_pos;
}
_notify_delete (cally_text);
}
static void
_cally_text_insert_text_cb (ClutterText *clutter_text,
gchar *new_text,
gint new_text_length,
gint *position,
gpointer data)
{
CallyText *cally_text = NULL;
g_return_if_fail (CALLY_IS_TEXT (data));
cally_text = CALLY_TEXT (data);
if (!cally_text->priv->signal_name_insert)
{
cally_text->priv->signal_name_insert = "text_changed::insert";
cally_text->priv->position_insert = *position;
cally_text->priv->length_insert = g_utf8_strlen (new_text, new_text_length);
}
/*
* The signal will be emitted when the cursor position is updated,
* or in an idle handler if it not updated.
*/
if (cally_text->priv->insert_idle_handler == 0)
cally_text->priv->insert_idle_handler = clutter_threads_add_idle (_idle_notify_insert,
cally_text);
}
/***** atkeditabletext.h ******/
static void
cally_text_editable_text_interface_init (AtkEditableTextIface *iface)
{
g_return_if_fail (iface != NULL);
iface->set_text_contents = cally_text_set_text_contents;
iface->insert_text = cally_text_insert_text;
iface->delete_text = cally_text_delete_text;
iface->set_run_attributes = NULL;
iface->copy_text = NULL;
iface->cut_text = NULL;
iface->paste_text = NULL;
}
static void
cally_text_set_text_contents (AtkEditableText *text,
const gchar *string)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL)
return;
if (!clutter_text_get_editable (CLUTTER_TEXT (actor)))
return;
clutter_text_set_text (CLUTTER_TEXT (actor),
string);
}
static void
cally_text_insert_text (AtkEditableText *text,
const gchar *string,
gint length,
gint *position)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL)
return;
if (!clutter_text_get_editable (CLUTTER_TEXT (actor)))
return;
if (length < 0)
length = g_utf8_strlen (string, -1);
clutter_text_insert_text (CLUTTER_TEXT (actor),
string, *position);
/* we suppose that the text insertion will be succesful,
clutter-text doesn't warn about it. A option would be search for
the text, but it seems not really required */
*position += length;
}
static void cally_text_delete_text (AtkEditableText *text,
gint start_pos,
gint end_pos)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL)
return;
if (!clutter_text_get_editable (CLUTTER_TEXT (actor)))
return;
clutter_text_delete_text (CLUTTER_TEXT (actor),
start_pos, end_pos);
}
/* CallyActor */
static void
cally_text_notify_clutter (GObject *obj,
GParamSpec *pspec)
{
ClutterText *clutter_text = NULL;
CallyText *cally_text = NULL;
AtkObject *atk_obj = NULL;
clutter_text = CLUTTER_TEXT (obj);
atk_obj = clutter_actor_get_accessible (CLUTTER_ACTOR (obj));
cally_text = CALLY_TEXT (atk_obj);
if (g_strcmp0 (pspec->name, "position") == 0)
{
/* the selection can change also for the cursor position */
if (_check_for_selection_change (cally_text, clutter_text))
g_signal_emit_by_name (atk_obj, "text_selection_changed");
g_signal_emit_by_name (atk_obj, "text_caret_moved",
clutter_text_get_cursor_position (clutter_text));
}
else if (g_strcmp0 (pspec->name, "selection-bound") == 0)
{
if (_check_for_selection_change (cally_text, clutter_text))
g_signal_emit_by_name (atk_obj, "text_selection_changed");
}
else if (g_strcmp0 (pspec->name, "editable") == 0)
{
atk_object_notify_state_change (atk_obj, ATK_STATE_EDITABLE,
clutter_text_get_editable (clutter_text));
}
else if (g_strcmp0 (pspec->name, "activatable") == 0)
{
_check_activate_action (cally_text, clutter_text);
}
else if (g_strcmp0 (pspec->name, "password-char") == 0)
{
if (clutter_text_get_password_char (clutter_text) != 0)
atk_object_set_role (atk_obj, ATK_ROLE_PASSWORD_TEXT);
else
atk_object_set_role (atk_obj, ATK_ROLE_TEXT);
}
else
{
CALLY_ACTOR_CLASS (cally_text_parent_class)->notify_clutter (obj, pspec);
}
}
static gboolean
_check_for_selection_change (CallyText *cally_text,
ClutterText *clutter_text)
{
gboolean ret_val = FALSE;
gint clutter_pos = -1;
gint clutter_bound = -1;
clutter_pos = clutter_text_get_cursor_position (clutter_text);
clutter_bound = clutter_text_get_selection_bound (clutter_text);
if (clutter_pos != clutter_bound)
{
if (clutter_pos != cally_text->priv->cursor_position ||
clutter_bound != cally_text->priv->selection_bound)
/*
* This check is here as this function can be called for
* notification of selection_bound and current_pos. The
* values of current_pos and selection_bound may be the same
* for both notifications and we only want to generate one
* text_selection_changed signal.
*/
ret_val = TRUE;
}
else
{
/* We had a selection */
ret_val = (cally_text->priv->cursor_position != cally_text->priv->selection_bound);
}
cally_text->priv->cursor_position = clutter_pos;
cally_text->priv->selection_bound = clutter_bound;
return ret_val;
}
static gboolean
_idle_notify_insert (gpointer data)
{
CallyText *cally_text = NULL;
cally_text = CALLY_TEXT (data);
cally_text->priv->insert_idle_handler = 0;
_notify_insert (cally_text);
return FALSE;
}
static void
_notify_insert (CallyText *cally_text)
{
if (cally_text->priv->signal_name_insert)
{
g_signal_emit_by_name (cally_text,
cally_text->priv->signal_name_insert,
cally_text->priv->position_insert,
cally_text->priv->length_insert);
cally_text->priv->signal_name_insert = NULL;
}
}
static void
_notify_delete (CallyText *cally_text)
{
if (cally_text->priv->signal_name_delete)
{
g_signal_emit_by_name (cally_text,
cally_text->priv->signal_name_delete,
cally_text->priv->position_delete,
cally_text->priv->length_delete);
cally_text->priv->signal_name_delete = NULL;
}
}
/* atkaction */
static void
_cally_text_activate_action (CallyActor *cally_actor)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (cally_actor);
clutter_text_activate (CLUTTER_TEXT (actor));
}
static void
_check_activate_action (CallyText *cally_text,
ClutterText *clutter_text)
{
if (clutter_text_get_activatable (clutter_text))
{
if (cally_text->priv->activate_action_id != 0)
return;
cally_text->priv->activate_action_id = cally_actor_add_action (CALLY_ACTOR (cally_text),
"activate", NULL, NULL,
_cally_text_activate_action);
}
else
{
if (cally_text->priv->activate_action_id == 0)
return;
if (cally_actor_remove_action (CALLY_ACTOR (cally_text),
cally_text->priv->activate_action_id))
{
cally_text->priv->activate_action_id = 0;
}
}
}
/* GailTextUtil/GailMisc reimplementation methods */
/**
* _cally_misc_add_attribute:
*
* Reimplementation of gail_misc_layout_get_run_attributes (check this
* function for more documentation).
*
* Returns: A pointer to the new #AtkAttributeSet.
**/
static AtkAttributeSet*
_cally_misc_add_attribute (AtkAttributeSet *attrib_set,
AtkTextAttribute attr,
gchar *value)
{
AtkAttributeSet *return_set;
AtkAttribute *at = g_malloc (sizeof (AtkAttribute));
at->name = g_strdup (atk_text_attribute_get_name (attr));
at->value = value;
return_set = g_slist_prepend(attrib_set, at);
return return_set;
}
static gint
_cally_atk_attribute_lookup_func (gconstpointer data,
gconstpointer user_data)
{
AtkTextAttribute attr = (AtkTextAttribute) user_data;
AtkAttribute *at = (AtkAttribute *) data;
if (!g_strcmp0 (at->name, atk_text_attribute_get_name (attr)))
return 0;
return -1;
}
static gboolean
_cally_misc_find_atk_attribute (AtkAttributeSet *attrib_set,
AtkTextAttribute attr)
{
GSList* result = g_slist_find_custom ((GSList*) attrib_set,
(gconstpointer) attr,
_cally_atk_attribute_lookup_func);
return (result != NULL);
}
/**
* _cally_misc_layout_atk_attributes_from_pango:
*
* Store the pango attributes as their ATK equivalent in an existing
* #AtkAttributeSet.
*
* Returns: A pointer to the updated #AtkAttributeSet.
**/
static AtkAttributeSet*
_cally_misc_layout_atk_attributes_from_pango (AtkAttributeSet *attrib_set,
PangoAttrIterator *iter)
{
PangoAttrString *pango_string;
PangoAttrInt *pango_int;
PangoAttrColor *pango_color;
PangoAttrLanguage *pango_lang;
PangoAttrFloat *pango_float;
gchar *value = NULL;
if ((pango_string = (PangoAttrString*) pango_attr_iterator_get (iter,
PANGO_ATTR_FAMILY)) != NULL)
{
value = g_strdup_printf("%s", pango_string->value);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_FAMILY_NAME,
value);
}
if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
PANGO_ATTR_STYLE)) != NULL)
{
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_STYLE,
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STYLE, pango_int->value)));
}
if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
PANGO_ATTR_WEIGHT)) != NULL)
{
value = g_strdup_printf("%i", pango_int->value);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_WEIGHT,
value);
}
if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
PANGO_ATTR_VARIANT)) != NULL)
{
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_VARIANT,
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_VARIANT, pango_int->value)));
}
if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
PANGO_ATTR_STRETCH)) != NULL)
{
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_STRETCH,
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STRETCH, pango_int->value)));
}
if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
PANGO_ATTR_SIZE)) != NULL)
{
value = g_strdup_printf("%i", pango_int->value / PANGO_SCALE);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_SIZE,
value);
}
if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
PANGO_ATTR_UNDERLINE)) != NULL)
{
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_UNDERLINE,
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_UNDERLINE, pango_int->value)));
}
if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
PANGO_ATTR_STRIKETHROUGH)) != NULL)
{
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_STRIKETHROUGH,
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STRIKETHROUGH, pango_int->value)));
}
if ((pango_int = (PangoAttrInt*) pango_attr_iterator_get (iter,
PANGO_ATTR_RISE)) != NULL)
{
value = g_strdup_printf("%i", pango_int->value);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_RISE,
value);
}
if ((pango_lang = (PangoAttrLanguage*) pango_attr_iterator_get (iter,
PANGO_ATTR_LANGUAGE)) != NULL)
{
value = g_strdup( pango_language_to_string( pango_lang->value));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_LANGUAGE,
value);
}
if ((pango_float = (PangoAttrFloat*) pango_attr_iterator_get (iter,
PANGO_ATTR_SCALE)) != NULL)
{
value = g_strdup_printf("%g", pango_float->value);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_SCALE,
value);
}
if ((pango_color = (PangoAttrColor*) pango_attr_iterator_get (iter,
PANGO_ATTR_FOREGROUND)) != NULL)
{
value = g_strdup_printf ("%u,%u,%u",
pango_color->color.red,
pango_color->color.green,
pango_color->color.blue);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_FG_COLOR,
value);
}
if ((pango_color = (PangoAttrColor*) pango_attr_iterator_get (iter,
PANGO_ATTR_BACKGROUND)) != NULL)
{
value = g_strdup_printf ("%u,%u,%u",
pango_color->color.red,
pango_color->color.green,
pango_color->color.blue);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_BG_COLOR,
value);
}
return attrib_set;
}
static AtkAttributeSet*
_cally_misc_add_actor_color_to_attribute_set (AtkAttributeSet *attrib_set,
ClutterText *clutter_text)
{
ClutterColor color;
gchar *value;
clutter_text_get_color (clutter_text, &color);
value = g_strdup_printf ("%u,%u,%u",
(guint) (color.red * 65535 / 255),
(guint) (color.green * 65535 / 255),
(guint) (color.blue * 65535 / 255));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_FG_COLOR,
value);
return attrib_set;
}
/**
* _cally_misc_layout_get_run_attributes:
*
* Reimplementation of gail_misc_layout_get_run_attributes (check this
* function for more documentation).
*
* Returns: A pointer to the #AtkAttributeSet.
**/
static AtkAttributeSet*
_cally_misc_layout_get_run_attributes (AtkAttributeSet *attrib_set,
ClutterText *clutter_text,
gint offset,
gint *start_offset,
gint *end_offset)
{
PangoAttrIterator *iter;
PangoAttrList *attr;
gint index, start_index, end_index;
gboolean is_next = TRUE;
glong len;
PangoLayout *layout = clutter_text_get_layout (clutter_text);
gchar *text = (gchar*) clutter_text_get_text (clutter_text);
len = g_utf8_strlen (text, -1);
/* Grab the attributes of the PangoLayout, if any */
if ((attr = pango_layout_get_attributes (layout)) == NULL)
{
*start_offset = 0;
*end_offset = len;
_cally_misc_add_actor_color_to_attribute_set (attrib_set, clutter_text);
}
else
{
iter = pango_attr_list_get_iterator (attr);
/* Get invariant range offsets */
/* If offset out of range, set offset in range */
if (offset > len)
offset = len;
else if (offset < 0)
offset = 0;
index = g_utf8_offset_to_pointer (text, offset) - text;
pango_attr_iterator_range (iter, &start_index, &end_index);
while (is_next)
{
if (index >= start_index && index < end_index)
{
*start_offset = g_utf8_pointer_to_offset (text,
text + start_index);
if (end_index == G_MAXINT)
/* Last iterator */
end_index = len;
*end_offset = g_utf8_pointer_to_offset (text,
text + end_index);
break;
}
is_next = pango_attr_iterator_next (iter);
pango_attr_iterator_range (iter, &start_index, &end_index);
}
/* Get attributes */
attrib_set = _cally_misc_layout_atk_attributes_from_pango (attrib_set, iter);
pango_attr_iterator_destroy (iter);
}
if (!_cally_misc_find_atk_attribute (attrib_set, ATK_TEXT_ATTR_FG_COLOR))
attrib_set = _cally_misc_add_actor_color_to_attribute_set (attrib_set, clutter_text);
return attrib_set;
}
/**
* _cally_misc_layout_get_default_attributes:
*
* Reimplementation of gail_misc_layout_get_default_attributes (check this
* function for more documentation).
*
* Returns: A pointer to the #AtkAttributeSet.
**/
static AtkAttributeSet*
_cally_misc_layout_get_default_attributes (AtkAttributeSet *attrib_set,
ClutterText *clutter_text)
{
PangoLayout *layout;
PangoContext *context;
PangoLanguage* language;
PangoFontDescription* font;
PangoWrapMode mode;
gchar *value = NULL;
gint int_value;
ClutterTextDirection text_direction;
PangoAttrIterator *iter;
PangoAttrList *attr;
text_direction = clutter_actor_get_text_direction (CLUTTER_ACTOR (clutter_text));
switch (text_direction)
{
case CLUTTER_TEXT_DIRECTION_DEFAULT:
value = g_strdup ("none");
break;
case CLUTTER_TEXT_DIRECTION_LTR:
value = g_strdup ("ltr");
break;
case CLUTTER_TEXT_DIRECTION_RTL:
value = g_strdup ("rtl");
break;
default:
value = g_strdup ("none");
break;
}
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_DIRECTION,
value);
layout = clutter_text_get_layout (clutter_text);
context = pango_layout_get_context (layout);
if (context)
{
if ((language = pango_context_get_language (context)))
{
value = g_strdup (pango_language_to_string (language));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_LANGUAGE, value);
}
if ((font = pango_context_get_font_description (context)))
{
value = g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STYLE,
pango_font_description_get_style (font)));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_STYLE,
value);
value = g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_VARIANT,
pango_font_description_get_variant (font)));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_VARIANT, value);
value = g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_STRETCH,
pango_font_description_get_stretch (font)));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_STRETCH, value);
value = g_strdup (pango_font_description_get_family (font));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_FAMILY_NAME, value);
value = g_strdup_printf ("%d", pango_font_description_get_weight (font));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_WEIGHT, value);
value = g_strdup_printf ("%i", pango_font_description_get_size (font) / PANGO_SCALE);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_SIZE, value);
}
}
if (pango_layout_get_justify (layout))
int_value = 3;
else
{
PangoAlignment align;
align = pango_layout_get_alignment (layout);
if (align == PANGO_ALIGN_LEFT)
int_value = 0;
else if (align == PANGO_ALIGN_CENTER)
int_value = 2;
else /* if (align == PANGO_ALIGN_RIGHT) */
int_value = 1;
}
value = g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_JUSTIFICATION,
int_value));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_JUSTIFICATION,
value);
mode = pango_layout_get_wrap (layout);
if (mode == PANGO_WRAP_WORD)
int_value = 2;
else /* if (mode == PANGO_WRAP_CHAR) */
int_value = 1;
value = g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_WRAP_MODE,
int_value));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_WRAP_MODE, value);
if ((attr = clutter_text_get_attributes (clutter_text)))
{
iter = pango_attr_list_get_iterator (attr);
/* Get attributes */
attrib_set = _cally_misc_layout_atk_attributes_from_pango (attrib_set, iter);
pango_attr_iterator_destroy (iter);
}
if (!_cally_misc_find_atk_attribute (attrib_set, ATK_TEXT_ATTR_FG_COLOR))
attrib_set = _cally_misc_add_actor_color_to_attribute_set (attrib_set,
clutter_text);
value = g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_FG_STIPPLE, 0));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_FG_STIPPLE,
value);
value = g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_BG_STIPPLE, 0));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_BG_STIPPLE,
value);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_BG_FULL_HEIGHT,
g_strdup_printf ("%i", 0));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_PIXELS_INSIDE_WRAP,
g_strdup_printf ("%i", 0));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_PIXELS_BELOW_LINES,
g_strdup_printf ("%i", 0));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_PIXELS_ABOVE_LINES,
g_strdup_printf ("%i", 0));
value = g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_EDITABLE,
clutter_text_get_editable (clutter_text)));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_EDITABLE,
value);
value = g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_INVISIBLE,
!CLUTTER_ACTOR_IS_VISIBLE (clutter_text)));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_INVISIBLE, value);
value = g_strdup_printf ("%i", pango_layout_get_indent (layout));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_INDENT, value);
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_RIGHT_MARGIN,
g_strdup_printf ("%i", 0));
attrib_set = _cally_misc_add_attribute (attrib_set,
ATK_TEXT_ATTR_LEFT_MARGIN,
g_strdup_printf ("%i", 0));
return attrib_set;
}
static int
_cally_misc_get_index_at_point (ClutterText *clutter_text,
gint x,
gint y,
AtkCoordType coords)
{
gint index, x_window, y_window, x_toplevel, y_toplevel;
gint x_temp, y_temp;
gboolean ret;
ClutterVertex verts[4];
PangoLayout *layout;
gint x_layout, y_layout;
clutter_text_get_layout_offsets (clutter_text, &x_layout, &y_layout);
clutter_actor_get_abs_allocation_vertices (CLUTTER_ACTOR (clutter_text), verts);
x_window = verts[0].x;
y_window = verts[0].y;
x_temp = x - x_layout - x_window;
y_temp = y - y_layout - y_window;
if (coords == ATK_XY_SCREEN)
{
_cally_actor_get_top_level_origin (CLUTTER_ACTOR (clutter_text), &x_toplevel,
&y_toplevel);
x_temp -= x_toplevel;
y_temp -= y_toplevel;
}
layout = clutter_text_get_layout (clutter_text);
ret = pango_layout_xy_to_index (layout,
x_temp * PANGO_SCALE,
y_temp * PANGO_SCALE,
&index, NULL);
if (!ret)
{
if (x_temp < 0 || y_temp < 0)
index = 0;
else
index = -1;
}
return index;
}
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