Revert of Reland r165710 "Replace RenderFullScreen with top layer"

Source/core/rendering/RenderFullScreen.cpp

Index: Source/core/rendering/RenderFullScreen.cpp
diff --git a/Source/core/rendering/RenderFullScreen.cpp b/Source/core/rendering/RenderFullScreen.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..664bc0244dd79477e63a5af4046dd5ac99180ed3
--- /dev/null
+++ b/Source/core/rendering/RenderFullScreen.cpp
@@ -0,0 +1,189 @@
+/*
+ * 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 "core/rendering/RenderFullScreen.h"
+
+#include "core/dom/FullscreenElementStack.h"
+#include "core/rendering/RenderBlockFlow.h"
+
+using namespace WebCore;
+
+class RenderFullScreenPlaceholder FINAL : public RenderBlockFlow {
+public:
+    RenderFullScreenPlaceholder(RenderFullScreen* owner)
+        : RenderBlockFlow(0)
+        , m_owner(owner)
+    {
+        setDocumentForAnonymous(&owner->document());
+    }
+private:
+    virtual bool isRenderFullScreenPlaceholder() const OVERRIDE { return true; }
+    virtual bool supportsPartialLayout() const OVERRIDE { return false; }
+    virtual void willBeDestroyed() OVERRIDE;
+    RenderFullScreen* m_owner;
+};
+
+void RenderFullScreenPlaceholder::willBeDestroyed()
+{
+    m_owner->setPlaceholder(0);
+    RenderBlock::willBeDestroyed();
+}
+
+RenderFullScreen::RenderFullScreen()
+    : RenderFlexibleBox(0)
+    , m_placeholder(0)
+{
+    setReplaced(false);
+}
+
+RenderFullScreen* RenderFullScreen::createAnonymous(Document* document)
+{
+    RenderFullScreen* renderer = new RenderFullScreen();
+    renderer->setDocumentForAnonymous(document);
+    return renderer;
+}
+
+void RenderFullScreen::willBeDestroyed()
+{
+    if (m_placeholder) {
+        remove();
+        if (!m_placeholder->beingDestroyed())
+            m_placeholder->destroy();
+        ASSERT(!m_placeholder);
+    }
+
+    // RenderObjects are unretained, so notify the document (which holds a pointer to a RenderFullScreen)
+    // if it's RenderFullScreen is destroyed.
+    FullscreenElementStack* controller = FullscreenElementStack::from(&document());
+    if (controller->fullScreenRenderer() == this)
+        controller->fullScreenRendererDestroyed();
+
+    RenderFlexibleBox::willBeDestroyed();
+}
+
+static PassRefPtr<RenderStyle> createFullScreenStyle()
+{
+    RefPtr<RenderStyle> fullscreenStyle = RenderStyle::createDefaultStyle();
+
+    // Create a stacking context:
+    fullscreenStyle->setZIndex(INT_MAX);
+
+    fullscreenStyle->setFontDescription(FontDescription());
+    fullscreenStyle->font().update(0);
+
+    fullscreenStyle->setDisplay(FLEX);
+    fullscreenStyle->setJustifyContent(JustifyCenter);
+    fullscreenStyle->setAlignItems(ItemPositionCenter);
+    fullscreenStyle->setFlexDirection(FlowColumn);
+
+    fullscreenStyle->setPosition(FixedPosition);
+    fullscreenStyle->setWidth(Length(100.0, Percent));
+    fullscreenStyle->setHeight(Length(100.0, Percent));
+    fullscreenStyle->setLeft(Length(0, WebCore::Fixed));
+    fullscreenStyle->setTop(Length(0, WebCore::Fixed));
+
+    fullscreenStyle->setBackgroundColor(StyleColor(Color::black));
+
+    return fullscreenStyle.release();
+}
+
+RenderObject* RenderFullScreen::wrapRenderer(RenderObject* object, RenderObject* parent, Document* document)
+{
+    RenderFullScreen* fullscreenRenderer = RenderFullScreen::createAnonymous(document);
+    fullscreenRenderer->setStyle(createFullScreenStyle());
+    if (parent && !parent->isChildAllowed(fullscreenRenderer, fullscreenRenderer->style())) {
+        fullscreenRenderer->destroy();
+        return 0;
+    }
+    if (object) {
+        // |object->parent()| can be null if the object is not yet attached
+        // to |parent|.
+        if (RenderObject* parent = object->parent()) {
+            RenderBlock* containingBlock = object->containingBlock();
+            ASSERT(containingBlock);
+            // Since we are moving the |object| to a new parent |fullscreenRenderer|,
+            // the line box tree underneath our |containingBlock| is not longer valid.
+            containingBlock->deleteLineBoxTree();
+
+            parent->addChild(fullscreenRenderer, object);
+            object->remove();
+
+            // Always just do a full layout to ensure that line boxes get deleted properly.
+            // Because objects moved from |parent| to |fullscreenRenderer|, we want to
+            // make new line boxes instead of leaving the old ones around.
+            parent->setNeedsLayoutAndPrefWidthsRecalc();
+            containingBlock->setNeedsLayoutAndPrefWidthsRecalc();
+        }
+        fullscreenRenderer->addChild(object);
+        fullscreenRenderer->setNeedsLayoutAndPrefWidthsRecalc();
+    }
+
+    FullscreenElementStack::from(document)->setFullScreenRenderer(fullscreenRenderer);
+    return fullscreenRenderer;
+}
+
+void RenderFullScreen::unwrapRenderer()
+{
+    if (parent()) {
+        RenderObject* child;
+        while ((child = firstChild())) {
+            // We have to clear the override size, because as a flexbox, we
+            // may have set one on the child, and we don't want to leave that
+            // lying around on the child.
+            if (child->isBox())
+                toRenderBox(child)->clearOverrideSize();
+            child->remove();
+            parent()->addChild(child, this);
+            parent()->setNeedsLayoutAndPrefWidthsRecalc();
+        }
+    }
+    if (placeholder())
+        placeholder()->remove();
+    remove();
+    FullscreenElementStack::from(&document())->setFullScreenRenderer(0);
+}
+
+void RenderFullScreen::setPlaceholder(RenderBlock* placeholder)
+{
+    m_placeholder = placeholder;
+}
+
+void RenderFullScreen::createPlaceholder(PassRefPtr<RenderStyle> style, const LayoutRect& frameRect)
+{
+    if (style->width().isAuto())
+        style->setWidth(Length(frameRect.width(), Fixed));
+    if (style->height().isAuto())
+        style->setHeight(Length(frameRect.height(), Fixed));
+
+    if (!m_placeholder) {
+        m_placeholder = new RenderFullScreenPlaceholder(this);
+        m_placeholder->setStyle(style);
+        if (parent()) {
+            parent()->addChild(m_placeholder, this);
+            parent()->setNeedsLayoutAndPrefWidthsRecalc();
+        }
+    } else
+        m_placeholder->setStyle(style);
+}