Remove GTK AX support, we've never used it

Source/WebCore/accessibility/atk/AXObjectCacheAtk.cpp

-/*
- * Copyright (C) 2008 Nuanti Ltd.
- *
- * 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 "AXObjectCache.h"
-
-#if HAVE(ACCESSIBILITY)
-
-#include "AccessibilityObject.h"
-#include "AccessibilityRenderObject.h"
-#include "Document.h"
-#include "Element.h"
-#include "HTMLSelectElement.h"
-#include "Range.h"
-#include "TextIterator.h"
-#include "WebKitAccessibleWrapperAtk.h"
-#include <wtf/gobject/GOwnPtr.h>
-
-namespace WebCore {
-
-void AXObjectCache::detachWrapper(AccessibilityObject* obj)
-{
-    webkitAccessibleDetach(WEBKIT_ACCESSIBLE(obj->wrapper()));
-}
-
-void AXObjectCache::attachWrapper(AccessibilityObject* obj)
-{
-    AtkObject* atkObj = ATK_OBJECT(webkitAccessibleNew(obj));
-    obj->setWrapper(atkObj);
-    g_object_unref(atkObj);
-}
-
-static AccessibilityObject* getListObject(AccessibilityObject* object)
-{
-    // Only list boxes and menu lists supported so far.
-    if (!object->isListBox() && !object->isMenuList())
-        return 0;
-
-    // For list boxes the list object is just itself.
-    if (object->isListBox())
-        return object;
-
-    // For menu lists we need to return the first accessible child,
-    // with role MenuListPopupRole, since that's the one holding the list
-    // of items with role MenuListOptionRole.
-    AccessibilityObject::AccessibilityChildrenVector children = object->children();
-    if (!children.size())
-        return 0;
-
-    AccessibilityObject* listObject = children.at(0).get();
-    if (!listObject->isMenuListPopup())
-        return 0;
-
-    return listObject;
-}
-
-static void notifyChildrenSelectionChange(AccessibilityObject* object)
-{
-    // This static variables are needed to keep track of the old
-    // focused object and its associated list 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>, oldListObject, ());
-    DEFINE_STATIC_LOCAL(RefPtr<AccessibilityObject>, oldFocusedObject, ());
-
-    // Only list boxes and menu lists supported so far.
-    if (!object || !(object->isListBox() || object->isMenuList()))
-        return;
-
-    // Only support HTML select elements so far (ARIA selectors not supported).
-    Node* node = object->node();
-    if (!node || !node->hasTagName(HTMLNames::selectTag))
-        return;
-
-    // Emit signal from the listbox's point of view first.
-    g_signal_emit_by_name(object->wrapper(), "selection-changed");
-
-    // Find the item where the selection change was triggered from.
-    HTMLSelectElement* select = toHTMLSelectElement(node);
-    if (!select)
-        return;
-    int changedItemIndex = select->activeSelectionStartListIndex();
-
-    AccessibilityObject* listObject = getListObject(object);
-    if (!listObject) {
-        oldListObject = 0;
-        return;
-    }
-
-    AccessibilityObject::AccessibilityChildrenVector items = listObject->children();
-    if (changedItemIndex < 0 || changedItemIndex >= static_cast<int>(items.size()))
-        return;
-    AccessibilityObject* item = items.at(changedItemIndex).get();
-
-    // Ensure the current list object is the same than the old one so
-    // further comparisons make sense. Otherwise, just reset
-    // oldFocusedObject so it won't be taken into account.
-    if (oldListObject != listObject)
-        oldFocusedObject = 0;
-
-    AtkObject* axItem = item ? item->wrapper() : 0;
-    AtkObject* axOldFocusedObject = oldFocusedObject ? oldFocusedObject->wrapper() : 0;
-
-    // Old focused object just lost focus, so emit the events.
-    if (axOldFocusedObject && axItem != axOldFocusedObject) {
-        g_signal_emit_by_name(axOldFocusedObject, "focus-event", false);
-        g_signal_emit_by_name(axOldFocusedObject, "state-change", "focused", false);
-    }
-
-    // Emit needed events for the currently (un)selected item.
-    if (axItem) {
-        bool isSelected = item->isSelected();
-        g_signal_emit_by_name(axItem, "state-change", "selected", isSelected);
-        g_signal_emit_by_name(axItem, "focus-event", isSelected);
-        g_signal_emit_by_name(axItem, "state-change", "focused", isSelected);
-    }
-
-    // Update pointers to the previously involved objects.
-    oldListObject = listObject;
-    oldFocusedObject = item;
-}
-
-void AXObjectCache::postPlatformNotification(AccessibilityObject* coreObject, AXNotification notification)
-{
-    AtkObject* axObject = coreObject->wrapper();
-    if (!axObject)
-        return;
-
-    if (notification == AXCheckedStateChanged) {
-        if (!coreObject->isCheckboxOrRadio())
-            return;
-        g_signal_emit_by_name(axObject, "state-change", "checked", coreObject->isChecked());
-    } else if (notification == AXSelectedChildrenChanged || notification == AXMenuListValueChanged) {
-        if (notification == AXMenuListValueChanged && coreObject->isMenuList()) {
-            g_signal_emit_by_name(axObject, "focus-event", true);
-            g_signal_emit_by_name(axObject, "state-change", "focused", true);
-        }
-        notifyChildrenSelectionChange(coreObject);
-    } else if (notification == AXValueChanged) {
-        if (!ATK_IS_VALUE(axObject))
-            return;
-
-        AtkPropertyValues propertyValues;
-        propertyValues.property_name = "accessible-value";
-
-        memset(&propertyValues.new_value,  0, sizeof(GValue));
-        atk_value_get_current_value(ATK_VALUE(axObject), &propertyValues.new_value);
-
-        g_signal_emit_by_name(ATK_OBJECT(axObject), "property-change::accessible-value", &propertyValues, NULL);
-    }
-}
-
-void AXObjectCache::nodeTextChangePlatformNotification(AccessibilityObject* object, AXTextChange textChange, unsigned offset, const String& text)
-{
-    if (!object || text.isEmpty())
-        return;
-
-    AccessibilityObject* parentObject = object->parentObjectUnignored();
-    if (!parentObject)
-        return;
-
-    AtkObject* wrapper = parentObject->wrapper();
-    if (!wrapper || !ATK_IS_TEXT(wrapper))
-        return;
-
-    Node* node = object->node();
-    if (!node)
-        return;
-
-    // Ensure document's layout is up-to-date before using TextIterator.
-    Document* document = node->document();
-    document->updateLayout();
-
-    // Select the right signal to be emitted
-    CString detail;
-    switch (textChange) {
-    case AXObjectCache::AXTextInserted:
-        detail = "text-insert";
-        break;
-    case AXObjectCache::AXTextDeleted:
-        detail = "text-remove";
-        break;
-    }
-
-    String textToEmit = text;
-    unsigned offsetToEmit = offset;
-
-    // If the object we're emitting the signal from represents a
-    // password field, we will emit the masked text.
-    if (parentObject->isPasswordField()) {
-        String maskedText = parentObject->passwordFieldValue();
-        textToEmit = maskedText.substring(offset, text.length());
-    } else {
-        // Consider previous text objects that might be present for
-        // the current accessibility object to ensure we emit the
-        // right offset (e.g. multiline text areas).
-        RefPtr<Range> range = Range::create(document, node->parentNode(), 0, node, 0);
-        offsetToEmit = offset + TextIterator::rangeLength(range.get());
-    }
-
-    g_signal_emit_by_name(wrapper, detail.data(), offsetToEmit, textToEmit.length(), textToEmit.utf8().data());
-}
-
-void AXObjectCache::frameLoadingEventPlatformNotification(AccessibilityObject* object, AXLoadingEvent loadingEvent)
-{
-    if (!object)
-        return;
-
-    AtkObject* axObject = object->wrapper();
-    if (!axObject || !ATK_IS_DOCUMENT(axObject))
-        return;
-
-    switch (loadingEvent) {
-    case AXObjectCache::AXLoadingStarted:
-        g_signal_emit_by_name(axObject, "state-change", "busy", true);
-        break;
-    case AXObjectCache::AXLoadingReloaded:
-        g_signal_emit_by_name(axObject, "state-change", "busy", true);
-        g_signal_emit_by_name(axObject, "reload");
-        break;
-    case AXObjectCache::AXLoadingFailed:
-        g_signal_emit_by_name(axObject, "load-stopped");
-        g_signal_emit_by_name(axObject, "state-change", "busy", false);
-        break;
-    case AXObjectCache::AXLoadingFinished:
-        g_signal_emit_by_name(axObject, "load-complete");
-        g_signal_emit_by_name(axObject, "state-change", "busy", false);
-        break;
-    }
-}
-
-void AXObjectCache::handleFocusedUIElementChanged(Node* oldFocusedNode, Node* newFocusedNode)
-{
-    RefPtr<AccessibilityObject> oldObject = getOrCreate(oldFocusedNode);
-    if (oldObject) {
-        g_signal_emit_by_name(oldObject->wrapper(), "focus-event", false);
-        g_signal_emit_by_name(oldObject->wrapper(), "state-change", "focused", false);
-    }
-    RefPtr<AccessibilityObject> newObject = getOrCreate(newFocusedNode);
-    if (newObject) {
-        g_signal_emit_by_name(newObject->wrapper(), "focus-event", true);
-        g_signal_emit_by_name(newObject->wrapper(), "state-change", "focused", true);
-    }
-}
-
-void AXObjectCache::handleScrolledToAnchor(const Node*)
-{
-}
-
-} // namespace WebCore
-
-#endif