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mutter-performance-source/clutter/cally/cally-text.c
Emmanuele Bassi 2b81d90dd7 Eliminate G_CONST_RETURN 
The G_CONST_RETURN define in GLib is, and has always been, a bit fuzzy.

We always used it to conform to the platform, at least for public-facing
API.

At first I assumed it has something to do with brain-damaged compilers
or with weird platforms where const was not really supported; sadly,
it's something much, much worse: it's a define that can be toggled at
compile-time to remove const from the signature of public API. This is a
truly terrifying feature that I assume was added in the past century,
and whose inception clearly had something to do with massive doses of
absynthe and opium — because any other explanation would make the
existence of such a feature even worse than assuming drugs had anything
to do with it.

Anyway, and pleasing the gods, this dubious feature is being
removed/deprecated in GLib; see bug:

  https://bugzilla.gnome.org/show_bug.cgi?id=644611

Before deprecation, though, we should just remove its usage from the
whole API. We should especially remove its usage from Cally's internals,
since there it never made sense in the first place.
2011-06-07 16:06:24 +01:00

1275 lines
43 KiB
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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.
*
* 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
*
*
*/
/*
* IMPLEMENTATION NOTES:
*
* * AtkText: There are still some methods not implemented yet:
* atk_text_get_default_attributes
* atk_text_get_character_extents
* atk_text_get_offset_at_point
*
* See details on bug CB#1733
*
* * AtkEditableText: some methods will not be implemented
*
* * atk_editable_text_set_run_attributes: ClutterText has some
* properties equivalent to the AtkAttributte, but it doesn't
* allow you to define it by
*
* * atk_editable_text_copy: Clutter has no Clipboard support
*
* * atk_editable_text_paste: Clutter has no Clipboard support
*
* * atk_editable_text_cut: Clutter has no Clipboard support. In
* this case, as cut is basically a copy&delete combination,
* we could have implemented it using the delete, but IMHO,
* it would be weird to cut a text, get the text removed and
* then not be able to paste the text
*
* See details on bug CB#1734
*/
#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_class_init (CallyTextClass *klass);
static void cally_text_init (CallyText *cally_text);
static void cally_text_finalize (GObject *obj);
/* AtkObject */
static void cally_text_real_initialize (AtkObject *obj,
gpointer data);
static const gchar * cally_text_get_name (AtkObject *obj);
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 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,
PangoLayout *layout,
gchar *text,
gint offset,
gint *start_offset,
gint *end_offset);
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 */
gchar *signal_name_insert;
gint position_insert;
gint length_insert;
guint insert_idle_handler;
/* text_changed::delete stuff */
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->get_name = cally_text_get_name;
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);
obj->role = ATK_ROLE_TEXT;
}
static const gchar *
cally_text_get_name (AtkObject *obj)
{
const gchar *name;
g_return_val_if_fail (CALLY_IS_ACTOR (obj), NULL);
name = ATK_OBJECT_CLASS (cally_text_parent_class)->get_name (obj);
if (name == NULL)
{
ClutterActor *actor = NULL;
actor = CALLY_GET_CLUTTER_ACTOR (obj);
if (actor == NULL) /* State is defunct */
name = NULL;
else
name = clutter_text_get_text (CLUTTER_TEXT (actor));
}
return name;
}
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;
}
/***** 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 = */
/* iface->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;
#if 0
ClutterText *clutter_text = NULL;
CallyText *cally_text = NULL;
#endif
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return NULL;
#if 0
clutter_text = CLUTTER_TEXT (actor);
cally_text = CALLY_TEXT (text);
return gail_text_util_get_text (cally_text->priv->textutil,
clutter_text_get_layout (clutter_text),
GAIL_BEFORE_OFFSET,
boundary_type,
offset,
start_offset, end_offset);
#endif
return NULL;
}
static gchar*
cally_text_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
ClutterActor *actor = NULL;
#if 0
ClutterText *clutter_text = NULL;
CallyText *cally_text = NULL;
#endif
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return NULL;
#if 0
clutter_text = CLUTTER_TEXT (actor);
cally_text = CALLY_TEXT (text);
return gail_text_util_get_text (cally_text->priv->textutil,
clutter_text_get_layout (clutter_text),
GAIL_AT_OFFSET,
boundary_type,
offset,
start_offset, end_offset);
#endif
return NULL;
}
static gchar*
cally_text_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
ClutterActor *actor = NULL;
#if 0
ClutterText *clutter_text = NULL;
CallyText *cally_text = NULL;
#endif
actor = CALLY_GET_CLUTTER_ACTOR (text);
if (actor == NULL) /* State is defunct */
return NULL;
#if 0
clutter_text = CLUTTER_TEXT (actor);
cally_text = CALLY_TEXT (text);
return gail_text_util_get_text (cally_text->priv->textutil,
clutter_text_get_layout (clutter_text),
GAIL_AFTER_OFFSET,
boundary_type,
offset,
start_offset, end_offset);
#endif
return NULL;
}
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_get_layout (clutter_text),
(gchar*)clutter_text_get_text (clutter_text),
offset,
start_offset,
end_offset);
return at_set;
}
/******** 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;
/* Not implemented, see IMPLEMENTATION NOTES*/
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
{
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;
}
/**
* _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,
PangoLayout *layout,
gchar *text,
gint offset,
gint *start_offset,
gint *end_offset)
{
PangoAttrIterator *iter;
PangoAttrList *attr;
PangoAttrString *pango_string;
PangoAttrInt *pango_int;
PangoAttrColor *pango_color;
PangoAttrLanguage *pango_lang;
PangoAttrFloat *pango_float;
gint index, start_index, end_index;
gboolean is_next = TRUE;
gchar *value = NULL;
glong len;
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;
return attrib_set;
}
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 */
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);
}
pango_attr_iterator_destroy (iter);
return attrib_set;
}
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