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-rw-r--r--accessible/atk/nsMaiInterfaceComponent.cpp186
1 files changed, 186 insertions, 0 deletions
diff --git a/accessible/atk/nsMaiInterfaceComponent.cpp b/accessible/atk/nsMaiInterfaceComponent.cpp
new file mode 100644
index 0000000000..81e82a8f53
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+++ b/accessible/atk/nsMaiInterfaceComponent.cpp
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "InterfaceInitFuncs.h"
+
+#include "LocalAccessible-inl.h"
+#include "AccessibleWrap.h"
+#include "nsAccUtils.h"
+#include "nsMai.h"
+#include "nsWindow.h"
+#include "mozilla/Likely.h"
+#include "mozilla/a11y/DocAccessibleParent.h"
+#include "mozilla/a11y/RemoteAccessible.h"
+#include "mozilla/dom/BrowserParent.h"
+#include "mozilla/dom/Document.h"
+#include "nsAccessibilityService.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+extern "C" {
+
+static AtkObject* refAccessibleAtPointCB(AtkComponent* aComponent, gint aAccX,
+ gint aAccY, AtkCoordType aCoordType) {
+ return refAccessibleAtPointHelper(ATK_OBJECT(aComponent), aAccX, aAccY,
+ aCoordType);
+}
+
+static void getExtentsCB(AtkComponent* aComponent, gint* aX, gint* aY,
+ gint* aWidth, gint* aHeight, AtkCoordType aCoordType) {
+ getExtentsHelper(ATK_OBJECT(aComponent), aX, aY, aWidth, aHeight, aCoordType);
+}
+
+static gboolean grabFocusCB(AtkComponent* aComponent) {
+ AtkObject* atkObject = ATK_OBJECT(aComponent);
+ Accessible* acc = GetInternalObj(atkObject);
+ if (acc) {
+ acc->TakeFocus();
+ return TRUE;
+ }
+ return FALSE;
+}
+
+// ScrollType is compatible
+MOZ_CAN_RUN_SCRIPT_BOUNDARY
+static gboolean scrollToCB(AtkComponent* aComponent, AtkScrollType type) {
+ AtkObject* atkObject = ATK_OBJECT(aComponent);
+ if (Accessible* acc = GetInternalObj(atkObject)) {
+ acc->ScrollTo(type);
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+// CoordType is compatible
+static gboolean scrollToPointCB(AtkComponent* aComponent, AtkCoordType coords,
+ gint x, gint y) {
+ AtkObject* atkObject = ATK_OBJECT(aComponent);
+ AccessibleWrap* accWrap = GetAccessibleWrap(atkObject);
+ if (accWrap) {
+ accWrap->ScrollToPoint(coords, x, y);
+ return TRUE;
+ }
+
+ RemoteAccessible* proxy = GetProxy(atkObject);
+ if (proxy) {
+ proxy->ScrollToPoint(coords, x, y);
+ return TRUE;
+ }
+
+ return FALSE;
+}
+}
+
+AtkObject* refAccessibleAtPointHelper(AtkObject* aAtkObj, gint aX, gint aY,
+ AtkCoordType aCoordType) {
+ Accessible* acc = GetInternalObj(aAtkObj);
+ if (!acc) {
+ return nullptr;
+ }
+
+ // Accessible::ChildAtPoint(x,y) is in screen pixels.
+ if (aCoordType == ATK_XY_WINDOW) {
+ mozilla::LayoutDeviceIntPoint winCoords =
+ nsAccUtils::GetScreenCoordsForWindow(acc);
+ aX += winCoords.x;
+ aY += winCoords.y;
+ }
+
+ Accessible* accAtPoint =
+ acc->ChildAtPoint(aX, aY, Accessible::EWhichChildAtPoint::DeepestChild);
+ if (!accAtPoint) {
+ return nullptr;
+ }
+ roles::Role role = accAtPoint->Role();
+ if (role == roles::TEXT_LEAF || role == roles::STATICTEXT) {
+ // We don't include text leaf nodes in the ATK tree, so return the parent.
+ accAtPoint = accAtPoint->Parent();
+ MOZ_ASSERT(accAtPoint, "Text leaf should always have a parent");
+ }
+ AtkObject* atkObj = GetWrapperFor(accAtPoint);
+ if (atkObj) {
+ g_object_ref(atkObj);
+ }
+ return atkObj;
+}
+
+static double getScaleFactor(Accessible* aAccessible) {
+ DocAccessible* docAcc = nullptr;
+ if (LocalAccessible* localAcc = aAccessible->AsLocal()) {
+ docAcc = localAcc->Document();
+ } else {
+ RemoteAccessible* remote = aAccessible->AsRemote();
+ LocalAccessible* outerDoc = remote->OuterDocOfRemoteBrowser();
+ if (outerDoc) {
+ docAcc = outerDoc->Document();
+ }
+ }
+
+ if (!docAcc || !docAcc->DocumentNode()) {
+ return 1.0;
+ }
+
+ nsCOMPtr<nsIWidget> rootWidget =
+ nsContentUtils::WidgetForDocument(docAcc->DocumentNode());
+ if (!rootWidget) {
+ return 1.0;
+ }
+
+ if (RefPtr<nsWindow> window =
+ static_cast<nsWindow*>(rootWidget->GetTopLevelWidget())) {
+ return window->FractionalScaleFactor();
+ }
+
+ return 1.0;
+}
+
+void getExtentsHelper(AtkObject* aAtkObj, gint* aX, gint* aY, gint* aWidth,
+ gint* aHeight, AtkCoordType aCoordType) {
+ *aX = *aY = *aWidth = *aHeight = -1;
+
+ Accessible* acc = GetInternalObj(aAtkObj);
+ if (!acc) {
+ return;
+ }
+
+ mozilla::LayoutDeviceIntRect screenRect = acc->Bounds();
+ if (screenRect.IsEmpty()) {
+ return;
+ }
+
+ if (aCoordType == ATK_XY_WINDOW) {
+ mozilla::LayoutDeviceIntPoint winCoords =
+ nsAccUtils::GetScreenCoordsForWindow(acc);
+ screenRect.x -= winCoords.x;
+ screenRect.y -= winCoords.y;
+ }
+
+ double scaleFactor = getScaleFactor(acc);
+
+ *aX = screenRect.x / scaleFactor;
+ *aY = screenRect.y / scaleFactor;
+ *aWidth = screenRect.width / scaleFactor;
+ *aHeight = screenRect.height / scaleFactor;
+}
+
+void componentInterfaceInitCB(AtkComponentIface* aIface) {
+ NS_ASSERTION(aIface, "Invalid Interface");
+ if (MOZ_UNLIKELY(!aIface)) return;
+
+ /*
+ * Use default implementation in atk for contains, get_position,
+ * and get_size
+ */
+ aIface->ref_accessible_at_point = refAccessibleAtPointCB;
+ aIface->get_extents = getExtentsCB;
+ aIface->grab_focus = grabFocusCB;
+ if (IsAtkVersionAtLeast(2, 30)) {
+ aIface->scroll_to = scrollToCB;
+ aIface->scroll_to_point = scrollToPointCB;
+ }
+}