1 files changed, 292 insertions, 0 deletions
diff --git a/Source/WebCore/page/PageOverlay.cpp b/Source/WebCore/page/PageOverlay.cpp
new file mode 100644
index 000000000..2ca86f982
--- /dev/null
+++ b/Source/WebCore/page/PageOverlay.cpp
@@ -0,0 +1,292 @@
+/*
+ * Copyright (C) 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. AND ITS CONTRIBUTORS ``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 ITS 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 "PageOverlay.h"
+
+#include "FrameView.h"
+#include "GraphicsContext.h"
+#include "MainFrame.h"
+#include "Page.h"
+#include "PageOverlayController.h"
+#include "PlatformMouseEvent.h"
+#include "ScrollbarTheme.h"
+#include <wtf/CurrentTime.h>
+
+namespace WebCore {
+
+static const double fadeAnimationDuration = 0.2;
+static const double fadeAnimationFrameRate = 30;
+
+static PageOverlay::PageOverlayID generatePageOverlayID()
+{
+    static PageOverlay::PageOverlayID pageOverlayID;
+    return ++pageOverlayID;
+}
+
+Ref<PageOverlay> PageOverlay::create(Client& client, OverlayType overlayType)
+{
+    return adoptRef(*new PageOverlay(client, overlayType));
+}
+
+PageOverlay::PageOverlay(Client& client, OverlayType overlayType)
+    : m_client(client)
+    , m_fadeAnimationTimer(*this, &PageOverlay::fadeAnimationTimerFired)
+    , m_fadeAnimationDuration(fadeAnimationDuration)
+    , m_needsSynchronousScrolling(overlayType == OverlayType::View)
+    , m_overlayType(overlayType)
+    , m_pageOverlayID(generatePageOverlayID())
+{
+}
+
+PageOverlay::~PageOverlay()
+{
+}
+
+PageOverlayController* PageOverlay::controller() const
+{
+    if (!m_page)
+        return nullptr;
+    return &m_page->mainFrame().pageOverlayController();
+}
+
+IntRect PageOverlay::bounds() const
+{
+    if (!m_overrideFrame.isEmpty())
+        return { { }, m_overrideFrame.size() };
+
+    FrameView* frameView = m_page->mainFrame().view();
+
+    if (!frameView)
+        return IntRect();
+
+    switch (m_overlayType) {
+    case OverlayType::View: {
+        int width = frameView->width();
+        int height = frameView->height();
+
+        if (!ScrollbarTheme::theme().usesOverlayScrollbars()) {
+            if (frameView->verticalScrollbar())
+                width -= frameView->verticalScrollbar()->width();
+            if (frameView->horizontalScrollbar())
+                height -= frameView->horizontalScrollbar()->height();
+        }
+        return IntRect(0, 0, width, height);
+    }
+    case OverlayType::Document:
+        return IntRect(IntPoint(), frameView->contentsSize());
+    }
+
+    ASSERT_NOT_REACHED();
+    return IntRect(IntPoint(), frameView->contentsSize());
+}
+
+IntRect PageOverlay::frame() const
+{
+    if (!m_overrideFrame.isEmpty())
+        return m_overrideFrame;
+
+    return bounds();
+}
+
+void PageOverlay::setFrame(IntRect frame)
+{
+    if (m_overrideFrame == frame)
+        return;
+
+    m_overrideFrame = frame;
+
+    if (auto pageOverlayController = controller())
+        pageOverlayController->didChangeOverlayFrame(*this);
+}
+
+IntSize PageOverlay::viewToOverlayOffset() const
+{
+    switch (m_overlayType) {
+    case OverlayType::View:
+        return IntSize();
+
+    case OverlayType::Document: {
+        FrameView* frameView = m_page->mainFrame().view();
+        return frameView ? toIntSize(frameView->viewToContents(IntPoint())) : IntSize();
+    }
+    }
+    return IntSize();
+}
+
+void PageOverlay::setBackgroundColor(const Color& backgroundColor)
+{
+    if (m_backgroundColor == backgroundColor)
+        return;
+
+    m_backgroundColor = backgroundColor;
+
+    if (auto pageOverlayController = controller())
+        pageOverlayController->didChangeOverlayBackgroundColor(*this);
+}
+
+void PageOverlay::setPage(Page* page)
+{
+    m_client.willMoveToPage(*this, page);
+    m_page = page;
+    m_client.didMoveToPage(*this, page);
+
+    m_fadeAnimationTimer.stop();
+}
+
+void PageOverlay::setNeedsDisplay(const IntRect& dirtyRect)
+{
+    if (auto pageOverlayController = controller()) {
+        if (m_fadeAnimationType != FadeAnimationType::NoAnimation)
+            pageOverlayController->setPageOverlayOpacity(*this, m_fractionFadedIn);
+        pageOverlayController->setPageOverlayNeedsDisplay(*this, dirtyRect);
+    }
+}
+
+void PageOverlay::setNeedsDisplay()
+{
+    setNeedsDisplay(bounds());
+}
+
+void PageOverlay::drawRect(GraphicsContext& graphicsContext, const IntRect& dirtyRect)
+{
+    // If the dirty rect is outside the bounds, ignore it.
+    IntRect paintRect = intersection(dirtyRect, bounds());
+    if (paintRect.isEmpty())
+        return;
+
+    GraphicsContextStateSaver stateSaver(graphicsContext);
+
+    if (m_overlayType == PageOverlay::OverlayType::Document) {
+        if (FrameView* frameView = m_page->mainFrame().view()) {
+            auto offset = frameView->scrollOrigin();
+            graphicsContext.translate(toFloatSize(offset));
+            paintRect.moveBy(-offset);
+        }
+    }
+
+    m_client.drawRect(*this, graphicsContext, paintRect);
+}
+    
+bool PageOverlay::mouseEvent(const PlatformMouseEvent& mouseEvent)
+{
+    IntPoint mousePositionInOverlayCoordinates(mouseEvent.position());
+
+    if (m_overlayType == PageOverlay::OverlayType::Document)
+        mousePositionInOverlayCoordinates = m_page->mainFrame().view()->windowToContents(mousePositionInOverlayCoordinates);
+    mousePositionInOverlayCoordinates.moveBy(-frame().location());
+
+    // Ignore events outside the bounds.
+    if (m_shouldIgnoreMouseEventsOutsideBounds && !bounds().contains(mousePositionInOverlayCoordinates))
+        return false;
+
+    return m_client.mouseEvent(*this, mouseEvent);
+}
+
+void PageOverlay::didScrollFrame(Frame& frame)
+{
+    m_client.didScrollFrame(*this, frame);
+}
+
+bool PageOverlay::copyAccessibilityAttributeStringValueForPoint(String attribute, FloatPoint parameter, String& value)
+{
+    return m_client.copyAccessibilityAttributeStringValueForPoint(*this, attribute, parameter, value);
+}
+
+bool PageOverlay::copyAccessibilityAttributeBoolValueForPoint(String attribute, FloatPoint parameter, bool& value)
+{
+    return m_client.copyAccessibilityAttributeBoolValueForPoint(*this, attribute, parameter, value);
+}
+
+Vector<String> PageOverlay::copyAccessibilityAttributeNames(bool parameterizedNames)
+{
+    return m_client.copyAccessibilityAttributeNames(*this, parameterizedNames);
+}
+
+void PageOverlay::startFadeInAnimation()
+{
+    m_fractionFadedIn = 0;
+    m_fadeAnimationType = FadeInAnimation;
+
+    startFadeAnimation();
+}
+
+void PageOverlay::startFadeOutAnimation()
+{
+    m_fractionFadedIn = 1;
+    m_fadeAnimationType = FadeOutAnimation;
+
+    startFadeAnimation();
+}
+
+void PageOverlay::stopFadeOutAnimation()
+{
+    m_fractionFadedIn = 1.0;
+    m_fadeAnimationTimer.stop();
+}
+
+void PageOverlay::startFadeAnimation()
+{
+    m_fadeAnimationStartTime = currentTime();
+    m_fadeAnimationTimer.startRepeating(1 / fadeAnimationFrameRate);
+}
+
+void PageOverlay::fadeAnimationTimerFired()
+{
+    float animationProgress = (currentTime() - m_fadeAnimationStartTime) / m_fadeAnimationDuration;
+
+    if (animationProgress >= 1.0)
+        animationProgress = 1.0;
+
+    double sine = sin(piOverTwoFloat * animationProgress);
+    float fadeAnimationValue = sine * sine;
+
+    m_fractionFadedIn = (m_fadeAnimationType == FadeInAnimation) ? fadeAnimationValue : 1 - fadeAnimationValue;
+    controller()->setPageOverlayOpacity(*this, m_fractionFadedIn);
+
+    if (animationProgress == 1.0) {
+        m_fadeAnimationTimer.stop();
+
+        bool wasFadingOut = m_fadeAnimationType == FadeOutAnimation;
+        m_fadeAnimationType = NoAnimation;
+
+        // If this was a fade out, uninstall the page overlay.
+        if (wasFadingOut)
+            controller()->uninstallPageOverlay(*this, PageOverlay::FadeMode::DoNotFade);
+    }
+}
+
+void PageOverlay::clear()
+{
+    if (auto pageOverlayController = controller())
+        pageOverlayController->clearPageOverlay(*this);
+}
+
+GraphicsLayer& PageOverlay::layer()
+{
+    return controller()->layerForOverlay(*this);
+}
+
+} // namespace WebKit