1 files changed, 259 insertions, 0 deletions
diff --git a/Tools/WebKitTestRunner/InjectedBundle/atk/AccessibilityNotificationHandlerAtk.cpp b/Tools/WebKitTestRunner/InjectedBundle/atk/AccessibilityNotificationHandlerAtk.cpp
new file mode 100644
index 000000000..95cf8ae4b
--- /dev/null
+++ b/Tools/WebKitTestRunner/InjectedBundle/atk/AccessibilityNotificationHandlerAtk.cpp
@@ -0,0 +1,259 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics Inc. All rights reserved.
+ *
+ * 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 "AccessibilityNotificationHandlerAtk.h"
+
+#if HAVE(ACCESSIBILITY)
+
+#include "InjectedBundle.h"
+#include "InjectedBundlePage.h"
+#include "JSWrapper.h"
+#include <WebKit/WKBundleFrame.h>
+#include <WebKit/WKBundlePage.h>
+#include <WebKit/WKBundlePagePrivate.h>
+#include <wtf/HashMap.h>
+#include <wtf/Vector.h>
+#include <wtf/glib/GUniquePtr.h>
+#include <wtf/text/CString.h>
+#include <wtf/text/WTFString.h>
+
+namespace WTR {
+
+namespace {
+
+typedef HashMap<AtkObject*, AccessibilityNotificationHandler*> NotificationHandlersMap;
+
+WTF::Vector<unsigned> listenerIds;
+NotificationHandlersMap notificationHandlers;
+AccessibilityNotificationHandler* globalNotificationHandler = nullptr;
+
+gboolean axObjectEventListener(GSignalInvocationHint* signalHint, unsigned numParamValues, const GValue* paramValues, gpointer data)
+{
+    // At least we should receive the instance emitting the signal.
+    if (!numParamValues)
+        return true;
+
+    AtkObject* accessible = ATK_OBJECT(g_value_get_object(&paramValues[0]));
+    if (!accessible || !ATK_IS_OBJECT(accessible))
+        return true;
+
+#if PLATFORM(GTK) || PLATFORM(EFL)
+    WKBundlePageRef page = InjectedBundle::singleton().page()->page();
+    WKBundleFrameRef mainFrame = WKBundlePageGetMainFrame(page);
+    JSContextRef jsContext = WKBundleFrameGetJavaScriptContext(mainFrame);
+#else
+    JSContextRef jsContext = nullptr;
+#endif
+
+    GSignalQuery signalQuery;
+    const char* notificationName = nullptr;
+    Vector<JSValueRef> extraArgs;
+
+    g_signal_query(signalHint->signal_id, &signalQuery);
+
+    if (!g_strcmp0(signalQuery.signal_name, "state-change")) {
+        if (!g_strcmp0(g_value_get_string(&paramValues[1]), "checked"))
+            notificationName = "CheckedStateChanged";
+        else if (!g_strcmp0(g_value_get_string(&paramValues[1]), "invalid-entry"))
+            notificationName = "AXInvalidStatusChanged";
+    } else if (!g_strcmp0(signalQuery.signal_name, "focus-event")) {
+        if (g_value_get_boolean(&paramValues[1]))
+            notificationName = "AXFocusedUIElementChanged";
+    } else if (!g_strcmp0(signalQuery.signal_name, "selection-changed")) {
+        notificationName = "AXSelectedChildrenChanged";
+    } else if (!g_strcmp0(signalQuery.signal_name, "children-changed")) {
+        const gchar* childrenChangedDetail = g_quark_to_string(signalHint->detail);
+        notificationName = !g_strcmp0(childrenChangedDetail, "add") ? "AXChildrenAdded" : "AXChildrenRemoved";
+    } else if (!g_strcmp0(signalQuery.signal_name, "property-change")) {
+        if (!g_strcmp0(g_quark_to_string(signalHint->detail), "accessible-value"))
+            notificationName = "AXValueChanged";
+    } else if (!g_strcmp0(signalQuery.signal_name, "load-complete"))
+        notificationName = "AXLoadComplete";
+    else if (!g_strcmp0(signalQuery.signal_name, "text-caret-moved")) {
+        notificationName = "AXTextCaretMoved";
+        GUniquePtr<char> signalValue(g_strdup_printf("%d", g_value_get_int(&paramValues[1])));
+        JSRetainPtr<JSStringRef> jsSignalValue(Adopt, JSStringCreateWithUTF8CString(signalValue.get()));
+        extraArgs.append(JSValueMakeString(jsContext, jsSignalValue.get()));
+    }
+
+    if (!jsContext)
+        return true;
+
+    if (notificationName) {
+        JSRetainPtr<JSStringRef> jsNotificationEventName(Adopt, JSStringCreateWithUTF8CString(notificationName));
+        JSValueRef notificationNameArgument = JSValueMakeString(jsContext, jsNotificationEventName.get());
+        NotificationHandlersMap::iterator elementNotificationHandler = notificationHandlers.find(accessible);
+        JSValueRef arguments[5]; // this dimension must be >= 2 + max(extraArgs.size())
+        arguments[0] = toJS(jsContext, WTF::getPtr(WTR::AccessibilityUIElement::create(accessible)));
+        arguments[1] = notificationNameArgument;
+        size_t numOfExtraArgs = extraArgs.size();
+        for (int i = 0; i < numOfExtraArgs; i++)
+            arguments[i + 2] = extraArgs[i];
+        if (elementNotificationHandler != notificationHandlers.end()) {
+            // Listener for one element. As arguments, it gets the notification name
+            // and sometimes extra arguments.
+            JSObjectCallAsFunction(jsContext,
+                const_cast<JSObjectRef>(elementNotificationHandler->value->notificationFunctionCallback()),
+                0, numOfExtraArgs + 1, arguments + 1, 0);
+        }
+
+        if (globalNotificationHandler) {
+            // A global listener gets additionally the element as the first argument.
+            JSObjectCallAsFunction(jsContext,
+                const_cast<JSObjectRef>(globalNotificationHandler->notificationFunctionCallback()),
+                0, numOfExtraArgs + 2, arguments, 0);
+        }
+    }
+
+    return true;
+}
+
+} // namespace
+
+AccessibilityNotificationHandler::AccessibilityNotificationHandler()
+    : m_platformElement(0)
+    , m_notificationFunctionCallback(0)
+{
+}
+
+AccessibilityNotificationHandler::~AccessibilityNotificationHandler()
+{
+    removeAccessibilityNotificationHandler();
+    disconnectAccessibilityCallbacks();
+}
+
+void AccessibilityNotificationHandler::setNotificationFunctionCallback(JSValueRef notificationFunctionCallback)
+{
+    if (!notificationFunctionCallback) {
+        removeAccessibilityNotificationHandler();
+        disconnectAccessibilityCallbacks();
+        return;
+    }
+
+    m_notificationFunctionCallback = notificationFunctionCallback;
+
+#if PLATFORM(GTK) || PLATFORM(EFL)
+    WKBundlePageRef page = InjectedBundle::singleton().page()->page();
+    WKBundleFrameRef mainFrame = WKBundlePageGetMainFrame(page);
+    JSContextRef jsContext = WKBundleFrameGetJavaScriptContext(mainFrame);
+#else
+    JSContextRef jsContext = nullptr;
+#endif
+    if (!jsContext)
+        return;
+
+    connectAccessibilityCallbacks();
+
+    JSValueProtect(jsContext, m_notificationFunctionCallback);
+    // Check if this notification handler is related to a specific element.
+    if (m_platformElement) {
+        NotificationHandlersMap::iterator currentNotificationHandler = notificationHandlers.find(m_platformElement.get());
+        if (currentNotificationHandler != notificationHandlers.end()) {
+            ASSERT(currentNotificationHandler->value->platformElement());
+            JSValueUnprotect(jsContext, currentNotificationHandler->value->notificationFunctionCallback());
+            notificationHandlers.remove(currentNotificationHandler->value->platformElement().get());
+        }
+        notificationHandlers.add(m_platformElement.get(), this);
+    } else {
+        if (globalNotificationHandler)
+            JSValueUnprotect(jsContext, globalNotificationHandler->notificationFunctionCallback());
+        globalNotificationHandler = this;
+    }
+}
+
+void AccessibilityNotificationHandler::removeAccessibilityNotificationHandler()
+{
+#if PLATFORM(GTK) || PLATFORM(EFL)
+    WKBundlePageRef page = InjectedBundle::singleton().page()->page();
+    WKBundleFrameRef mainFrame = WKBundlePageGetMainFrame(page);
+    JSContextRef jsContext = WKBundleFrameGetJavaScriptContext(mainFrame);
+#else
+    JSContextRef jsContext = nullptr;
+#endif
+    if (!jsContext)
+        return;
+
+    if (globalNotificationHandler == this) {
+        JSValueUnprotect(jsContext, globalNotificationHandler->notificationFunctionCallback());
+        globalNotificationHandler = nullptr;
+    } else if (m_platformElement.get()) {
+        NotificationHandlersMap::iterator removeNotificationHandler = notificationHandlers.find(m_platformElement.get());
+        if (removeNotificationHandler != notificationHandlers.end()) {
+            JSValueUnprotect(jsContext, removeNotificationHandler->value->notificationFunctionCallback());
+            notificationHandlers.remove(removeNotificationHandler);
+        }
+    }
+}
+
+void AccessibilityNotificationHandler::connectAccessibilityCallbacks()
+{
+    // Ensure no callbacks are connected before.
+    if (!disconnectAccessibilityCallbacks())
+        return;
+
+    const char* signalNames[] = {
+        "ATK:AtkObject:state-change",
+        "ATK:AtkObject:focus-event",
+        "ATK:AtkObject:active-descendant-changed",
+        "ATK:AtkObject:children-changed",
+        "ATK:AtkObject:property-change",
+        "ATK:AtkObject:visible-data-changed",
+        "ATK:AtkDocument:load-complete",
+        "ATK:AtkSelection:selection-changed",
+        "ATK:AtkText:text-caret-moved",
+        0
+    };
+
+    // Register atk interfaces, otherwise add_global may fail.
+    GObject* dummyObject = (GObject*)g_object_new(G_TYPE_OBJECT, NULL, NULL);
+    g_object_unref(atk_no_op_object_new(dummyObject));
+    g_object_unref(dummyObject);
+
+    // Add global listeners for AtkObject's signals.
+    for (const char** signalName = signalNames; *signalName; signalName++) {
+        unsigned id = atk_add_global_event_listener(axObjectEventListener, *signalName);
+        if (!id) {
+            String message = String::format("atk_add_global_event_listener failed for signal %s\n", *signalName);
+            InjectedBundle::singleton().outputText(message);
+            continue;
+        }
+
+        listenerIds.append(id);
+    }
+}
+
+bool AccessibilityNotificationHandler::disconnectAccessibilityCallbacks()
+{
+    // Only disconnect if there is no notification handler.
+    if (!notificationHandlers.isEmpty() || globalNotificationHandler)
+        return false;
+
+    // AtkObject signals.
+    for (int i = 0; i < listenerIds.size(); i++) {
+        ASSERT(listenerIds[i]);
+        atk_remove_global_event_listener(listenerIds[i]);
+    }
+    listenerIds.clear();
+    return true;
+}
+
+} // namespace WTR
+
+#endif // HAVE(ACCESSIBILITY)