Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 409 insertions, 0 deletions

diff --git a/Source/WebCore/rendering/RenderWidget.cpp b/Source/WebCore/rendering/RenderWidget.cpp
new file mode 100644
index 0000000..152bb2f
--- /dev/null
+++ b/Source/WebCore/rendering/RenderWidget.cpp
@@ -0,0 +1,409 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2006, 2009, 2010 Apple 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 "RenderWidget.h"
+
+#include "AXObjectCache.h"
+#include "AnimationController.h"
+#include "GraphicsContext.h"
+#include "HitTestResult.h"
+#include "RenderCounter.h"
+#include "RenderLayer.h"
+#include "RenderView.h"
+#include "RenderWidgetProtector.h"
+
+#if USE(ACCELERATED_COMPOSITING)
+#include "RenderLayerBacking.h"
+#endif
+
+using namespace std;
+
+namespace WebCore {
+
+static HashMap<const Widget*, RenderWidget*>& widgetRendererMap()
+{
+    static HashMap<const Widget*, RenderWidget*>* staticWidgetRendererMap = new HashMap<const Widget*, RenderWidget*>;
+    return *staticWidgetRendererMap;
+}
+
+static size_t widgetHierarchyUpdateSuspendCount;
+
+typedef HashMap<RefPtr<Widget>, FrameView*> WidgetToParentMap;
+
+static WidgetToParentMap& widgetNewParentMap()
+{
+    DEFINE_STATIC_LOCAL(WidgetToParentMap, map, ());
+    return map;
+}
+
+void RenderWidget::suspendWidgetHierarchyUpdates()
+{
+    widgetHierarchyUpdateSuspendCount++;
+}
+
+void RenderWidget::resumeWidgetHierarchyUpdates()
+{
+    ASSERT(widgetHierarchyUpdateSuspendCount);
+    if (widgetHierarchyUpdateSuspendCount == 1) {
+        WidgetToParentMap map = widgetNewParentMap();
+        widgetNewParentMap().clear();
+        WidgetToParentMap::iterator end = map.end();
+        for (WidgetToParentMap::iterator it = map.begin(); it != end; ++it) {
+            Widget* child = it->first.get();
+            ScrollView* currentParent = child->parent();
+            FrameView* newParent = it->second;
+            if (newParent != currentParent) {
+                if (currentParent)
+                    currentParent->removeChild(child);
+                if (newParent)
+                    newParent->addChild(child);
+            }
+        }
+    }
+    widgetHierarchyUpdateSuspendCount--;
+}
+
+static void moveWidgetToParentSoon(Widget* child, FrameView* parent)
+{
+    if (!widgetHierarchyUpdateSuspendCount) {
+        if (parent)
+            parent->addChild(child);
+        else
+            child->removeFromParent();
+        return;
+    }
+    widgetNewParentMap().set(child, parent);
+}
+
+RenderWidget::RenderWidget(Node* node)
+    : RenderReplaced(node)
+    , m_widget(0)
+    , m_frameView(node->document()->view())
+    // Reference counting is used to prevent the widget from being
+    // destroyed while inside the Widget code, which might not be
+    // able to handle that.
+    , m_refCount(1)
+{
+    view()->addWidget(this);
+}
+
+void RenderWidget::destroy()
+{
+    // We can't call the base class's destroy because we don't
+    // want to unconditionally delete ourselves (we're ref-counted).
+    // So the code below includes copied and pasted contents of
+    // both RenderBox::destroy() and RenderObject::destroy().
+    // Fix originally made for <rdar://problem/4228818>.
+
+    animation()->cancelAnimations(this);
+
+    if (RenderView* v = view())
+        v->removeWidget(this);
+
+    if (m_hasCounterNodeMap)
+        RenderCounter::destroyCounterNodes(this);
+    
+    if (AXObjectCache::accessibilityEnabled()) {
+        document()->axObjectCache()->childrenChanged(this->parent());
+        document()->axObjectCache()->remove(this);
+    }
+    remove();
+
+    setWidget(0);
+
+    // removes from override size map
+    if (hasOverrideSize())
+        setOverrideSize(-1);
+
+    if (style() && (style()->height().isPercent() || style()->minHeight().isPercent() || style()->maxHeight().isPercent()))
+        RenderBlock::removePercentHeightDescendant(this);
+
+    if (hasLayer()) {
+        layer()->clearClipRects();
+        setHasLayer(false);
+        destroyLayer();
+    }
+
+    // Grab the arena from node()->document()->renderArena() before clearing the node pointer.
+    // Clear the node before deref-ing, as this may be deleted when deref is called.
+    RenderArena* arena = renderArena();
+    setNode(0);
+    deref(arena);
+}
+
+RenderWidget::~RenderWidget()
+{
+    ASSERT(m_refCount <= 0);
+    clearWidget();
+}
+
+bool RenderWidget::setWidgetGeometry(const IntRect& frame)
+{
+    ASSERT(!widgetHierarchyUpdateSuspendCount);
+    if (!node())
+        return false;
+
+    IntRect clipRect = enclosingLayer()->childrenClipRect();
+    bool clipChanged = m_clipRect != clipRect;
+    bool boundsChanged = m_widget->frameRect() != frame;
+
+    if (!boundsChanged && !clipChanged)
+        return false;
+
+    m_clipRect = clipRect;
+
+    RenderWidgetProtector protector(this);
+    RefPtr<Node> protectedNode(node());
+    m_widget->setFrameRect(frame);
+    
+#if USE(ACCELERATED_COMPOSITING)
+    if (hasLayer() && layer()->isComposited())
+        layer()->backing()->updateAfterWidgetResize();
+#endif
+    
+    return boundsChanged;
+}
+
+void RenderWidget::setWidget(PassRefPtr<Widget> widget)
+{
+    if (widget == m_widget)
+        return;
+
+    if (m_widget) {
+        moveWidgetToParentSoon(m_widget.get(), 0);
+        widgetRendererMap().remove(m_widget.get());
+        clearWidget();
+    }
+    m_widget = widget;
+    if (m_widget) {
+        widgetRendererMap().add(m_widget.get(), this);
+        // If we've already received a layout, apply the calculated space to the
+        // widget immediately, but we have to have really been fully constructed (with a non-null
+        // style pointer).
+        if (style()) {
+            if (!needsLayout())
+                setWidgetGeometry(absoluteContentBox());
+            if (style()->visibility() != VISIBLE)
+                m_widget->hide();
+            else
+                m_widget->show();
+        }
+        moveWidgetToParentSoon(m_widget.get(), m_frameView);
+    }
+}
+
+void RenderWidget::layout()
+{
+    ASSERT(needsLayout());
+
+    setNeedsLayout(false);
+}
+
+void RenderWidget::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
+{
+    RenderReplaced::styleDidChange(diff, oldStyle);
+    if (m_widget) {
+        if (style()->visibility() != VISIBLE)
+            m_widget->hide();
+        else
+            m_widget->show();
+    }
+}
+
+void RenderWidget::showSubstituteImage(PassRefPtr<Image> prpImage)
+{
+    m_substituteImage = prpImage;
+    repaint();
+}
+
+void RenderWidget::notifyWidget(WidgetNotification notification)
+{
+    if (m_widget)
+        m_widget->notifyWidget(notification);
+}
+
+void RenderWidget::paint(PaintInfo& paintInfo, int tx, int ty)
+{
+    if (!shouldPaint(paintInfo, tx, ty))
+        return;
+
+    tx += x();
+    ty += y();
+
+    if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection))
+        paintBoxDecorations(paintInfo, tx, ty);
+
+    if (paintInfo.phase == PaintPhaseMask) {
+        paintMask(paintInfo, tx, ty);
+        return;
+    }
+
+    if (!m_frameView || paintInfo.phase != PaintPhaseForeground || style()->visibility() != VISIBLE)
+        return;
+
+#if PLATFORM(MAC)
+    if (style()->highlight() != nullAtom && !paintInfo.context->paintingDisabled())
+        paintCustomHighlight(tx - x(), ty - y(), style()->highlight(), true);
+#endif
+
+    if (style()->hasBorderRadius()) {
+        IntRect borderRect = IntRect(tx, ty, width(), height());
+
+        if (borderRect.isEmpty())
+            return;
+
+        // Push a clip if we have a border radius, since we want to round the foreground content that gets painted.
+        paintInfo.context->save();
+        
+        IntSize topLeft, topRight, bottomLeft, bottomRight;
+        style()->getBorderRadiiForRect(borderRect, topLeft, topRight, bottomLeft, bottomRight);
+
+        paintInfo.context->addRoundedRectClip(borderRect, topLeft, topRight, bottomLeft, bottomRight);
+    }
+
+    if (m_widget) {
+        // Tell the widget to paint now.  This is the only time the widget is allowed
+        // to paint itself.  That way it will composite properly with z-indexed layers.
+        if (m_substituteImage)
+            paintInfo.context->drawImage(m_substituteImage.get(), style()->colorSpace(), m_widget->frameRect());
+        else {
+            IntPoint widgetLocation = m_widget->frameRect().location();
+            IntPoint paintLocation(tx + borderLeft() + paddingLeft(), ty + borderTop() + paddingTop());
+            IntRect paintRect = paintInfo.rect;
+
+            IntSize paintOffset = paintLocation - widgetLocation;
+            // When painting widgets into compositing layers, tx and ty are relative to the enclosing compositing layer,
+            // not the root. In this case, shift the CTM and adjust the paintRect to be root-relative to fix plug-in drawing.
+            if (!paintOffset.isZero()) {
+                paintInfo.context->translate(paintOffset);
+                paintRect.move(-paintOffset);
+            }
+            m_widget->paint(paintInfo.context, paintRect);
+
+            if (!paintOffset.isZero())
+                paintInfo.context->translate(-paintOffset);
+        }
+
+        if (m_widget->isFrameView()) {
+            FrameView* frameView = static_cast<FrameView*>(m_widget.get());
+            bool runOverlapTests = !frameView->useSlowRepaintsIfNotOverlapped() || frameView->hasCompositedContentIncludingDescendants();
+            if (paintInfo.overlapTestRequests && runOverlapTests) {
+                ASSERT(!paintInfo.overlapTestRequests->contains(this));
+                paintInfo.overlapTestRequests->set(this, m_widget->frameRect());
+            }
+         }
+    }
+
+    if (style()->hasBorderRadius())
+        paintInfo.context->restore();
+
+    // Paint a partially transparent wash over selected widgets.
+    if (isSelected() && !document()->printing()) {
+        // FIXME: selectionRect() is in absolute, not painting coordinates.
+        paintInfo.context->fillRect(selectionRect(), selectionBackgroundColor(), style()->colorSpace());
+    }
+}
+
+void RenderWidget::setOverlapTestResult(bool isOverlapped)
+{
+    ASSERT(m_widget);
+    ASSERT(m_widget->isFrameView());
+    static_cast<FrameView*>(m_widget.get())->setIsOverlapped(isOverlapped);
+}
+
+void RenderWidget::deref(RenderArena *arena)
+{
+    if (--m_refCount <= 0)
+        arenaDelete(arena, this);
+}
+
+void RenderWidget::updateWidgetPosition()
+{
+    if (!m_widget || !node()) // Check the node in case destroy() has been called.
+        return;
+
+    // FIXME: This doesn't work correctly with transforms.
+    FloatPoint absPos = localToAbsolute();
+    absPos.move(borderLeft() + paddingLeft(), borderTop() + paddingTop());
+
+    int w = width() - borderAndPaddingWidth();
+    int h = height() - borderAndPaddingHeight();
+
+    bool boundsChanged = setWidgetGeometry(IntRect(absPos.x(), absPos.y(), w, h));
+
+    // if the frame bounds got changed, or if view needs layout (possibly indicating
+    // content size is wrong) we have to do a layout to set the right widget size
+    if (m_widget && m_widget->isFrameView()) {
+        FrameView* frameView = static_cast<FrameView*>(m_widget.get());
+        // Check the frame's page to make sure that the frame isn't in the process of being destroyed.
+        if ((boundsChanged || frameView->needsLayout()) && frameView->frame()->page())
+            frameView->layout();
+    }
+}
+
+void RenderWidget::widgetPositionsUpdated()
+{
+    if (!m_widget)
+        return;
+    m_widget->widgetPositionsUpdated();
+}
+
+IntRect RenderWidget::windowClipRect() const
+{
+    if (!m_frameView)
+        return IntRect();
+
+    return intersection(m_frameView->contentsToWindow(m_clipRect), m_frameView->windowClipRect());
+}
+
+void RenderWidget::setSelectionState(SelectionState state)
+{
+    if (selectionState() != state) {
+        RenderReplaced::setSelectionState(state);
+        if (m_widget)
+            m_widget->setIsSelected(isSelected());
+    }
+}
+
+void RenderWidget::clearWidget()
+{
+    m_widget = 0;
+}
+
+RenderWidget* RenderWidget::find(const Widget* widget)
+{
+    return widgetRendererMap().get(widget);
+}
+
+bool RenderWidget::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, HitTestAction action)
+{
+    bool hadResult = result.innerNode();
+    bool inside = RenderReplaced::nodeAtPoint(request, result, x, y, tx, ty, action);
+    
+    // Check to see if we are really over the widget itself (and not just in the border/padding area).
+    if ((inside || result.isRectBasedTest()) && !hadResult && result.innerNode() == node())
+        result.setIsOverWidget(contentBoxRect().contains(result.localPoint()));
+    return inside;
+}
+
+} // namespace WebCore