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/*
* Copyright (C) 2009 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "SelectionController.h"
#include "AccessibilityObjectWrapperAtk.h"
#include "AXObjectCache.h"
#include "Frame.h"
#include "RefPtr.h"
#include <gtk/gtk.h>
namespace WebCore {
static void emitTextSelectionChange(AccessibilityObject* object, VisibleSelection selection, int offset)
{
AtkObject* axObject = object->wrapper();
if (!axObject || !ATK_IS_TEXT(axObject))
return;
g_signal_emit_by_name(axObject, "text-caret-moved", offset);
if (selection.isRange())
g_signal_emit_by_name(axObject, "text-selection-changed");
}
static void maybeEmitTextFocusChange(PassRefPtr<AccessibilityObject> prpObject)
{
// This static variable is needed to keep track of the old object
// as per previous calls to this function, in order to properly
// decide whether to emit some signals or not.
DEFINE_STATIC_LOCAL(RefPtr<AccessibilityObject>, oldObject, ());
RefPtr<AccessibilityObject> object = prpObject;
// Ensure the oldObject belongs to the same document that the
// current object so further comparisons make sense. Otherwise,
// just reset oldObject to 0 so it won't be taken into account in
// the immediately following call to this function.
if (object && oldObject && oldObject->document() != object->document())
oldObject = 0;
AtkObject* axObject = object ? object->wrapper() : 0;
AtkObject* oldAxObject = oldObject ? oldObject->wrapper() : 0;
if (axObject != oldAxObject) {
if (oldAxObject && ATK_IS_TEXT(oldAxObject)) {
g_signal_emit_by_name(oldAxObject, "focus-event", false);
g_signal_emit_by_name(oldAxObject, "state-change", "focused", false);
}
if (axObject && ATK_IS_TEXT(axObject)) {
g_signal_emit_by_name(axObject, "focus-event", true);
g_signal_emit_by_name(axObject, "state-change", "focused", true);
}
}
// Update pointer to last focused object.
oldObject = object;
}
void SelectionController::notifyAccessibilityForSelectionChange()
{
if (!AXObjectCache::accessibilityEnabled())
return;
// Reset lastFocuseNode and return for no valid selections.
if (!m_selection.start().isNotNull() || !m_selection.end().isNotNull())
return;
RenderObject* focusedNode = m_selection.end().node()->renderer();
AccessibilityObject* accessibilityObject = m_frame->document()->axObjectCache()->getOrCreate(focusedNode);
// Need to check this as getOrCreate could return 0,
if (!accessibilityObject)
return;
int offset;
// Always report the events w.r.t. the non-linked unignored parent. (i.e. ignoreLinks == true).
RefPtr<AccessibilityObject> object = objectAndOffsetUnignored(accessibilityObject, offset, true);
if (!object)
return;
// Emit relatedsignals.
emitTextSelectionChange(object.get(), m_selection, offset);
maybeEmitTextFocusChange(object.release());
}
} // namespace WebCore
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