151 lines
3.8 KiB
C++
151 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "InterfaceInitFuncs.h"
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#include "AccessibleWrap.h"
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#include "nsAccUtils.h"
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#include "nsCoreUtils.h"
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#include "nsMai.h"
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#include "mozilla/Likely.h"
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#include "mozilla/a11y/ProxyAccessible.h"
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using namespace mozilla::a11y;
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extern "C" {
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static AtkObject*
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refAccessibleAtPointCB(AtkComponent* aComponent, gint aAccX, gint aAccY,
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AtkCoordType aCoordType)
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{
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return refAccessibleAtPointHelper(ATK_OBJECT(aComponent),
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aAccX, aAccY, aCoordType);
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}
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static void
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getExtentsCB(AtkComponent* aComponent, gint* aX, gint* aY,
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gint* aWidth, gint* aHeight, AtkCoordType aCoordType)
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{
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getExtentsHelper(ATK_OBJECT(aComponent),
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aX, aY, aWidth, aHeight, aCoordType);
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}
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static gboolean
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grabFocusCB(AtkComponent* aComponent)
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{
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AtkObject* atkObject = ATK_OBJECT(aComponent);
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AccessibleWrap* accWrap = GetAccessibleWrap(atkObject);
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if (accWrap) {
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accWrap->TakeFocus();
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return TRUE;
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}
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ProxyAccessible* proxy = GetProxy(atkObject);
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if (proxy) {
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proxy->TakeFocus();
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return TRUE;
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}
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return FALSE;
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}
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}
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AtkObject*
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refAccessibleAtPointHelper(AtkObject* aAtkObj, gint aX, gint aY,
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AtkCoordType aCoordType)
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{
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AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
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if (accWrap) {
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if (accWrap->IsDefunct() || nsAccUtils::MustPrune(accWrap)) {
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return nullptr;
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}
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// Accessible::ChildAtPoint(x,y) is in screen pixels.
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if (aCoordType == ATK_XY_WINDOW) {
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nsIntPoint winCoords =
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nsCoreUtils::GetScreenCoordsForWindow(accWrap->GetNode());
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aX += winCoords.x;
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aY += winCoords.y;
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}
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Accessible* accAtPoint = accWrap->ChildAtPoint(aX, aY,
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Accessible::eDirectChild);
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if (!accAtPoint) {
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return nullptr;
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}
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AtkObject* atkObj = AccessibleWrap::GetAtkObject(accAtPoint);
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if (atkObj) {
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g_object_ref(atkObj);
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}
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return atkObj;
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}
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if (ProxyAccessible* proxy = GetProxy(aAtkObj)) {
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ProxyAccessible* result =
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proxy->AccessibleAtPoint(aX, aY, aCoordType == ATK_XY_WINDOW);
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AtkObject* atkObj = result ? GetWrapperFor(result) : nullptr;
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if (atkObj) {
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g_object_ref(atkObj);
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}
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return atkObj;
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}
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return nullptr;
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}
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void
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getExtentsHelper(AtkObject* aAtkObj,
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gint* aX, gint* aY, gint* aWidth, gint* aHeight,
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AtkCoordType aCoordType)
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{
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AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
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*aX = *aY = *aWidth = *aHeight = 0;
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if (accWrap) {
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if (accWrap->IsDefunct()) {
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return;
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}
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nsIntRect screenRect = accWrap->Bounds();
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if (screenRect.IsEmpty())
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return;
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if (aCoordType == ATK_XY_WINDOW) {
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nsIntPoint winCoords =
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nsCoreUtils::GetScreenCoordsForWindow(accWrap->GetNode());
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screenRect.x -= winCoords.x;
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screenRect.y -= winCoords.y;
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}
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*aX = screenRect.x;
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*aY = screenRect.y;
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*aWidth = screenRect.width;
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*aHeight = screenRect.height;
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return;
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}
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if (ProxyAccessible* proxy = GetProxy(aAtkObj)) {
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proxy->Extents(aCoordType == ATK_XY_WINDOW, aX, aY, aWidth, aHeight);
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}
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}
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void
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componentInterfaceInitCB(AtkComponentIface* aIface)
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{
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NS_ASSERTION(aIface, "Invalid Interface");
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if(MOZ_UNLIKELY(!aIface))
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return;
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/*
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* Use default implementation in atk for contains, get_position,
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* and get_size
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*/
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aIface->ref_accessible_at_point = refAccessibleAtPointCB;
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aIface->get_extents = getExtentsCB;
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aIface->grab_focus = grabFocusCB;
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}
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