Add initial Blink-side support for the Screen Orientation API

Source/modules/screen_orientation/testing/ScreenOrientationClientMock.cpp

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "ScreenOrientationClientMock.h"
+
+#include "modules/screen_orientation/ScreenOrientationController.h"
+
+namespace WebCore {
+
+ScreenOrientationClientMock::ScreenOrientationClientMock()
+    : m_controllerTimer(this, &ScreenOrientationClientMock::controllerTimerFired)
+    , m_controller(0)
+    , m_orientation(OrientationPortraitPrimary)
+    , m_lockedOrientations(OrientationAny)
+{
+}
+
+ScreenOrientationClientMock::~ScreenOrientationClientMock()
+{
+}
+
+void ScreenOrientationClientMock::setController(ScreenOrientationController* controller)
+{
+    ASSERT(controller && !m_controller);
+    m_controller = controller;
+}
+
+void ScreenOrientationClientMock::setScreenOrientation(ScreenOrientationValue orientation)
+{
+    if (orientation == m_orientation)
+        return;
+
+    m_orientation = orientation;
+    if (m_lockedOrientations & orientation)
+        asyncUpdateController();
+}
+
+void ScreenOrientationClientMock::asyncUpdateController()
+{
+    ASSERT(m_controller);
+    if (!m_controllerTimer.isActive())
+        m_controllerTimer.startOneShot(0);
+}
+
+void ScreenOrientationClientMock::controllerTimerFired(Timer<ScreenOrientationClientMock>* timer)
+{
+    ASSERT_UNUSED(timer, timer == &m_controllerTimer);
+    ASSERT(m_controller);
+
+    m_controller->orientationChanged(m_orientation);
+}
+
+void ScreenOrientationClientMock::maybeUpdateOrientationAfterLocking()
+{
+    if (m_orientation & m_lockedOrientations)
+        return;
+
+    // We need to change our current screen orientation to meet the locking requirements.
+    ScreenOrientationValue supportedOrientationValues[] = {
+        OrientationPortraitPrimary,
+        OrientationLandscapePrimary,
+        OrientationPortraitSecondary,
+        OrientationLandscapeSecondary
+    };
+
+    for (unsigned i = 0; i < WTF_ARRAY_LENGTH(supportedOrientationValues); ++i) {
+        if (m_lockedOrientations & supportedOrientationValues[i]) {
+            m_orientation = supportedOrientationValues[i];
+            asyncUpdateController();
+            return;
+        }
+    }
+    ASSERT_NOT_REACHED();
+}
+
+void ScreenOrientationClientMock::lockOrientation(ScreenOrientationValues orientations)
+{
+    m_lockedOrientations = orientations;
+    maybeUpdateOrientationAfterLocking();
+}
+
+void ScreenOrientationClientMock::unlockOrientation()
+{
+    m_lockedOrientations = OrientationAny;
+    if (m_orientation != m_controller->orientation())
+        asyncUpdateController();
+}
+
+} // namespace WebCore