--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKitTools/DumpRenderTree/win/AccessibilityControllerWin.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,294 @@
+/*
+ * Copyright (C) 2008, 2009, 2010 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "AccessibilityController.h"
+
+#include "AccessibilityUIElement.h"
+#include "DumpRenderTree.h"
+#include "FrameLoadDelegate.h"
+#include <JavaScriptCore/Assertions.h>
+#include <JavaScriptCore/JSRetainPtr.h>
+#include <JavaScriptCore/JSStringRef.h>
+#include <WebCore/COMPtr.h>
+#include <WebKit/WebKit.h>
+#include <oleacc.h>
+#include <string>
+
+using namespace std;
+
+AccessibilityController::AccessibilityController()
+ : m_focusEventHook(0)
+ , m_scrollingStartEventHook(0)
+ , m_valueChangeEventHook(0)
+ , m_allEventsHook(0)
+{
+}
+
+AccessibilityController::~AccessibilityController()
+{
+ setLogFocusEvents(false);
+ setLogValueChangeEvents(false);
+
+ if (m_allEventsHook)
+ UnhookWinEvent(m_allEventsHook);
+
+ for (HashMap<PlatformUIElement, JSObjectRef>::iterator it = m_notificationListeners.begin(); it != m_notificationListeners.end(); ++it)
+ JSValueUnprotect(frame->globalContext(), it->second);
+}
+
+AccessibilityUIElement AccessibilityController::elementAtPoint(int x, int y)
+{
+ // FIXME: implement
+ return 0;
+}
+
+AccessibilityUIElement AccessibilityController::focusedElement()
+{
+ COMPtr<IAccessible> rootAccessible = rootElement().platformUIElement();
+
+ VARIANT vFocus;
+ if (FAILED(rootAccessible->get_accFocus(&vFocus)))
+ return 0;
+
+ if (V_VT(&vFocus) == VT_I4) {
+ ASSERT(V_I4(&vFocus) == CHILDID_SELF);
+ // The root accessible object is the focused object.
+ return rootAccessible;
+ }
+
+ ASSERT(V_VT(&vFocus) == VT_DISPATCH);
+ // We have an IDispatch; query for IAccessible.
+ return COMPtr<IAccessible>(Query, V_DISPATCH(&vFocus));
+}
+
+AccessibilityUIElement AccessibilityController::rootElement()
+{
+ COMPtr<IWebView> view;
+ if (FAILED(frame->webView(&view)))
+ return 0;
+
+ COMPtr<IWebViewPrivate> viewPrivate(Query, view);
+ if (!viewPrivate)
+ return 0;
+
+ HWND webViewWindow;
+ if (FAILED(viewPrivate->viewWindow((OLE_HANDLE*)&webViewWindow)))
+ return 0;
+
+ // Get the root accessible object by querying for the accessible object for the
+ // WebView's window.
+ COMPtr<IAccessible> rootAccessible;
+ if (FAILED(AccessibleObjectFromWindow(webViewWindow, static_cast<DWORD>(OBJID_CLIENT), __uuidof(IAccessible), reinterpret_cast<void**>(&rootAccessible))))
+ return 0;
+
+ return rootAccessible;
+}
+
+static void CALLBACK logEventProc(HWINEVENTHOOK, DWORD event, HWND hwnd, LONG idObject, LONG idChild, DWORD, DWORD)
+{
+ // Get the accessible object for this event.
+ COMPtr<IAccessible> parentObject;
+
+ VARIANT vChild;
+ VariantInit(&vChild);
+
+ HRESULT hr = AccessibleObjectFromEvent(hwnd, idObject, idChild, &parentObject, &vChild);
+ ASSERT(SUCCEEDED(hr));
+
+ // Get the name of the focused element, and log it to stdout.
+ BSTR nameBSTR;
+ hr = parentObject->get_accName(vChild, &nameBSTR);
+ ASSERT(SUCCEEDED(hr));
+ wstring name(nameBSTR, ::SysStringLen(nameBSTR));
+ SysFreeString(nameBSTR);
+
+ switch (event) {
+ case EVENT_OBJECT_FOCUS:
+ printf("Received focus event for object '%S'.\n", name.c_str());
+ break;
+
+ case EVENT_OBJECT_VALUECHANGE: {
+ BSTR valueBSTR;
+ hr = parentObject->get_accValue(vChild, &valueBSTR);
+ ASSERT(SUCCEEDED(hr));
+ wstring value(valueBSTR, ::SysStringLen(valueBSTR));
+ SysFreeString(valueBSTR);
+
+ printf("Received value change event for object '%S', value '%S'.\n", name.c_str(), value.c_str());
+ break;
+ }
+
+ case EVENT_SYSTEM_SCROLLINGSTART:
+ printf("Received scrolling start event for object '%S'.\n", name.c_str());
+ break;
+
+ default:
+ printf("Received unknown event for object '%S'.\n", name.c_str());
+ break;
+ }
+
+ VariantClear(&vChild);
+}
+
+void AccessibilityController::setLogFocusEvents(bool logFocusEvents)
+{
+ if (!!m_focusEventHook == logFocusEvents)
+ return;
+
+ if (!logFocusEvents) {
+ UnhookWinEvent(m_focusEventHook);
+ m_focusEventHook = 0;
+ return;
+ }
+
+ // Ensure that accessibility is initialized for the WebView by querying for
+ // the root accessible object.
+ rootElement();
+
+ m_focusEventHook = SetWinEventHook(EVENT_OBJECT_FOCUS, EVENT_OBJECT_FOCUS, GetModuleHandle(0), logEventProc, GetCurrentProcessId(), 0, WINEVENT_INCONTEXT);
+
+ ASSERT(m_focusEventHook);
+}
+
+void AccessibilityController::setLogValueChangeEvents(bool logValueChangeEvents)
+{
+ if (!!m_valueChangeEventHook == logValueChangeEvents)
+ return;
+
+ if (!logValueChangeEvents) {
+ UnhookWinEvent(m_valueChangeEventHook);
+ m_valueChangeEventHook = 0;
+ return;
+ }
+
+ // Ensure that accessibility is initialized for the WebView by querying for
+ // the root accessible object.
+ rootElement();
+
+ m_valueChangeEventHook = SetWinEventHook(EVENT_OBJECT_VALUECHANGE, EVENT_OBJECT_VALUECHANGE, GetModuleHandle(0), logEventProc, GetCurrentProcessId(), 0, WINEVENT_INCONTEXT);
+
+ ASSERT(m_valueChangeEventHook);
+}
+
+void AccessibilityController::setLogScrollingStartEvents(bool logScrollingStartEvents)
+{
+ if (!!m_scrollingStartEventHook == logScrollingStartEvents)
+ return;
+
+ if (!logScrollingStartEvents) {
+ UnhookWinEvent(m_scrollingStartEventHook);
+ m_scrollingStartEventHook = 0;
+ return;
+ }
+
+ // Ensure that accessibility is initialized for the WebView by querying for
+ // the root accessible object.
+ rootElement();
+
+ m_scrollingStartEventHook = SetWinEventHook(EVENT_SYSTEM_SCROLLINGSTART, EVENT_SYSTEM_SCROLLINGSTART, GetModuleHandle(0), logEventProc, GetCurrentProcessId(), 0, WINEVENT_INCONTEXT);
+
+ ASSERT(m_scrollingStartEventHook);
+}
+
+static string stringEvent(DWORD event)
+{
+ switch(event) {
+ case EVENT_OBJECT_VALUECHANGE:
+ return "value change event";
+ default:
+ return "unknown event";
+ }
+}
+
+static void CALLBACK notificationListenerProc(HWINEVENTHOOK, DWORD event, HWND hwnd, LONG idObject, LONG idChild, DWORD, DWORD)
+{
+ // Get the accessible object for this event.
+ COMPtr<IAccessible> parentObject;
+
+ VARIANT vChild;
+ VariantInit(&vChild);
+
+ HRESULT hr = AccessibleObjectFromEvent(hwnd, idObject, idChild, &parentObject, &vChild);
+ ASSERT(SUCCEEDED(hr));
+
+ COMPtr<IDispatch> childDispatch;
+ if (FAILED(parentObject->get_accChild(vChild, &childDispatch))) {
+ VariantClear(&vChild);
+ return;
+ }
+
+ COMPtr<IAccessible> childAccessible(Query, childDispatch);
+
+ sharedFrameLoadDelegate->accessibilityController()->notificationReceived(childAccessible, stringEvent(event));
+
+ VariantClear(&vChild);
+}
+
+static COMPtr<IAccessibleComparable> comparableObject(const COMPtr<IServiceProvider>& serviceProvider)
+{
+ COMPtr<IAccessibleComparable> comparable;
+ serviceProvider->QueryService(SID_AccessibleComparable, __uuidof(IAccessibleComparable), reinterpret_cast<void**>(&comparable));
+ return comparable;
+}
+
+void AccessibilityController::notificationReceived(PlatformUIElement element, const string& eventName)
+{
+ for (HashMap<PlatformUIElement, JSObjectRef>::iterator it = m_notificationListeners.begin(); it != m_notificationListeners.end(); ++it) {
+ COMPtr<IServiceProvider> thisServiceProvider(Query, it->first);
+ if (!thisServiceProvider)
+ continue;
+
+ COMPtr<IAccessibleComparable> thisComparable = comparableObject(thisServiceProvider);
+ if (!thisComparable)
+ continue;
+
+ COMPtr<IServiceProvider> elementServiceProvider(Query, element);
+ if (!elementServiceProvider)
+ continue;
+
+ COMPtr<IAccessibleComparable> elementComparable = comparableObject(elementServiceProvider);
+ if (!elementComparable)
+ continue;
+
+ BOOL isSame = FALSE;
+ thisComparable->isSameObject(elementComparable.get(), &isSame);
+ if (!isSame)
+ continue;
+
+ JSRetainPtr<JSStringRef> jsNotification(Adopt, JSStringCreateWithUTF8CString(eventName.c_str()));
+ JSValueRef argument = JSValueMakeString(frame->globalContext(), jsNotification.get());
+ JSObjectCallAsFunction(frame->globalContext(), it->second, NULL, 1, &argument, NULL);
+ }
+}
+
+void AccessibilityController::addNotificationListener(PlatformUIElement element, JSObjectRef functionCallback)
+{
+ if (!m_allEventsHook)
+ m_allEventsHook = SetWinEventHook(EVENT_MIN, EVENT_MAX, GetModuleHandle(0), notificationListenerProc, GetCurrentProcessId(), 0, WINEVENT_INCONTEXT);
+
+ JSValueProtect(frame->globalContext(), functionCallback);
+ m_notificationListeners.add(element, functionCallback);
+}