Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 412 insertions, 0 deletions

diff --git a/Source/WebCore/rendering/RenderReplaced.cpp b/Source/WebCore/rendering/RenderReplaced.cpp
new file mode 100644
index 0000000..974a8d0
--- /dev/null
+++ b/Source/WebCore/rendering/RenderReplaced.cpp
@@ -0,0 +1,412 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
+ * Copyright (C) 2004, 2006, 2007 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 "RenderReplaced.h"
+
+#include "GraphicsContext.h"
+#include "RenderBlock.h"
+#include "RenderLayer.h"
+#include "RenderTheme.h"
+#include "RenderView.h"
+#include "VisiblePosition.h"
+
+using namespace std;
+
+namespace WebCore {
+
+const int cDefaultWidth = 300;
+const int cDefaultHeight = 150;
+
+RenderReplaced::RenderReplaced(Node* node)
+    : RenderBox(node)
+    , m_intrinsicSize(cDefaultWidth, cDefaultHeight)
+    , m_hasIntrinsicSize(false)
+{
+    setReplaced(true);
+}
+
+RenderReplaced::RenderReplaced(Node* node, const IntSize& intrinsicSize)
+    : RenderBox(node)
+    , m_intrinsicSize(intrinsicSize)
+    , m_hasIntrinsicSize(true)
+{
+    setReplaced(true);
+}
+
+RenderReplaced::~RenderReplaced()
+{
+}
+
+void RenderReplaced::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
+{
+    RenderBox::styleDidChange(diff, oldStyle);
+
+    bool hadStyle = (oldStyle != 0);
+    float oldZoom = hadStyle ? oldStyle->effectiveZoom() : RenderStyle::initialZoom();
+    if (style() && style()->effectiveZoom() != oldZoom)
+        intrinsicSizeChanged();
+}
+
+void RenderReplaced::layout()
+{
+    ASSERT(needsLayout());
+    
+    LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
+    
+    setHeight(minimumReplacedHeight());
+
+    computeLogicalWidth();
+    computeLogicalHeight();
+
+    m_overflow.clear();
+    addShadowOverflow();
+    updateLayerTransform();
+    
+    repainter.repaintAfterLayout();
+    setNeedsLayout(false);
+}
+ 
+void RenderReplaced::intrinsicSizeChanged()
+{
+    int scaledWidth = static_cast<int>(cDefaultWidth * style()->effectiveZoom());
+    int scaledHeight = static_cast<int>(cDefaultHeight * style()->effectiveZoom());
+    m_intrinsicSize = IntSize(scaledWidth, scaledHeight);
+    setNeedsLayoutAndPrefWidthsRecalc();
+}
+
+void RenderReplaced::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 ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())
+        paintOutline(paintInfo.context, tx, ty, width(), height());
+    
+    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection)
+        return;
+    
+    if (!paintInfo.shouldPaintWithinRoot(this))
+        return;
+    
+    bool drawSelectionTint = selectionState() != SelectionNone && !document()->printing();
+    if (paintInfo.phase == PaintPhaseSelection) {
+        if (selectionState() == SelectionNone)
+            return;
+        drawSelectionTint = false;
+    }
+
+    bool completelyClippedOut = false;
+    if (style()->hasBorderRadius()) {
+        IntRect borderRect = IntRect(tx, ty, width(), height());
+
+        if (borderRect.isEmpty())
+            completelyClippedOut = true;
+        else {
+            // 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 (!completelyClippedOut) {
+        paintReplaced(paintInfo, tx, ty);
+
+        if (style()->hasBorderRadius())
+            paintInfo.context->restore();
+    }
+        
+    // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of
+    // surrounding content.
+    if (drawSelectionTint) {
+        IntRect selectionPaintingRect = localSelectionRect();
+        selectionPaintingRect.move(tx, ty);
+        paintInfo.context->fillRect(selectionPaintingRect, selectionBackgroundColor(), style()->colorSpace());
+    }
+}
+
+bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, int& tx, int& ty)
+{
+    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseOutline && paintInfo.phase != PaintPhaseSelfOutline 
+            && paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseMask)
+        return false;
+
+    if (!paintInfo.shouldPaintWithinRoot(this))
+        return false;
+        
+    // if we're invisible or haven't received a layout yet, then just bail.
+    if (style()->visibility() != VISIBLE)
+        return false;
+
+    int currentTX = tx + x();
+    int currentTY = ty + y();
+
+    // Early exit if the element touches the edges.
+    int top = currentTY + topVisualOverflow();
+    int bottom = currentTY + bottomVisualOverflow();
+    if (isSelected() && m_inlineBoxWrapper) {
+        int selTop = ty + m_inlineBoxWrapper->root()->selectionTop();
+        int selBottom = ty + selTop + m_inlineBoxWrapper->root()->selectionHeight();
+        top = min(selTop, top);
+        bottom = max(selBottom, bottom);
+    }
+    
+    int os = 2 * maximalOutlineSize(paintInfo.phase);
+    if (currentTX + leftVisualOverflow() >= paintInfo.rect.right() + os || currentTX + rightVisualOverflow() <= paintInfo.rect.x() - os)
+        return false;
+    if (top >= paintInfo.rect.bottom() + os || bottom <= paintInfo.rect.y() - os)
+        return false;
+
+    return true;
+}
+
+static inline bool lengthIsSpecified(Length length)
+{
+    LengthType lengthType = length.type();
+    return lengthType == Fixed || lengthType == Percent;
+}
+
+int RenderReplaced::computeReplacedLogicalWidth(bool includeMaxWidth) const
+{
+    int logicalWidth;
+    if (lengthIsSpecified(style()->width()))
+        logicalWidth = computeReplacedLogicalWidthUsing(style()->logicalWidth());
+    else if (m_hasIntrinsicSize)
+        logicalWidth = calcAspectRatioLogicalWidth();
+    else
+        logicalWidth = intrinsicLogicalWidth();
+
+    int minLogicalWidth = computeReplacedLogicalWidthUsing(style()->logicalMinWidth());
+    int maxLogicalWidth = !includeMaxWidth || style()->logicalMaxWidth().isUndefined() ? logicalWidth : computeReplacedLogicalWidthUsing(style()->logicalMaxWidth());
+
+    return max(minLogicalWidth, min(logicalWidth, maxLogicalWidth));
+}
+
+int RenderReplaced::computeReplacedLogicalHeight() const
+{
+    int logicalHeight;
+    if (lengthIsSpecified(style()->logicalHeight()))
+        logicalHeight = computeReplacedLogicalHeightUsing(style()->logicalHeight());
+    else if (m_hasIntrinsicSize)
+        logicalHeight = calcAspectRatioLogicalHeight();
+    else
+        logicalHeight = intrinsicLogicalHeight();
+
+    int minLogicalHeight = computeReplacedLogicalHeightUsing(style()->logicalMinHeight());
+    int maxLogicalHeight = style()->logicalMaxHeight().isUndefined() ? logicalHeight : computeReplacedLogicalHeightUsing(style()->logicalMaxHeight());
+
+    return max(minLogicalHeight, min(logicalHeight, maxLogicalHeight));
+}
+
+int RenderReplaced::calcAspectRatioLogicalWidth() const
+{
+    int intrinsicWidth = intrinsicLogicalWidth();
+    int intrinsicHeight = intrinsicLogicalHeight();
+    if (!intrinsicHeight)
+        return 0;
+    return RenderBox::computeReplacedLogicalHeight() * intrinsicWidth / intrinsicHeight;
+}
+
+int RenderReplaced::calcAspectRatioLogicalHeight() const
+{
+    int intrinsicWidth = intrinsicLogicalWidth();
+    int intrinsicHeight = intrinsicLogicalHeight();
+    if (!intrinsicWidth)
+        return 0;
+    return RenderBox::computeReplacedLogicalWidth() * intrinsicHeight / intrinsicWidth;
+}
+
+void RenderReplaced::computePreferredLogicalWidths()
+{
+    ASSERT(preferredLogicalWidthsDirty());
+
+    int borderAndPadding = borderAndPaddingWidth();
+    m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(false) + borderAndPadding;
+
+    if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength)
+        m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, style()->maxWidth().value() + (style()->boxSizing() == CONTENT_BOX ? borderAndPadding : 0));
+
+    if (style()->width().isPercent() || style()->height().isPercent()
+        || style()->maxWidth().isPercent() || style()->maxHeight().isPercent()
+        || style()->minWidth().isPercent() || style()->minHeight().isPercent())
+        m_minPreferredLogicalWidth = 0;
+    else
+        m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth;
+
+    setPreferredLogicalWidthsDirty(false);
+}
+
+unsigned RenderReplaced::caretMaxRenderedOffset() const
+{
+    return 1; 
+}
+
+VisiblePosition RenderReplaced::positionForPoint(const IntPoint& point)
+{
+    InlineBox* box = inlineBoxWrapper();
+    if (!box)
+        return createVisiblePosition(0, DOWNSTREAM);
+
+    // FIXME: This code is buggy if the replaced element is relative positioned.
+
+    RootInlineBox* root = box->root();
+
+    int top = root->selectionTop();
+    int bottom = root->selectionBottom();
+
+    int blockDirectionPosition = box->isHorizontal() ? point.y() + y() : point.x() + x();
+    int lineDirectionPosition = box->isHorizontal() ? point.x() + x() : point.y() + y();
+
+    if (blockDirectionPosition < top)
+        return createVisiblePosition(caretMinOffset(), DOWNSTREAM); // coordinates are above
+    
+    if (blockDirectionPosition >= bottom)
+        return createVisiblePosition(caretMaxOffset(), DOWNSTREAM); // coordinates are below
+    
+    if (node()) {
+        if (lineDirectionPosition <= box->logicalLeft() + (box->logicalWidth() / 2))
+            return createVisiblePosition(0, DOWNSTREAM);
+        return createVisiblePosition(1, DOWNSTREAM);
+    }
+
+    return RenderBox::positionForPoint(point);
+}
+
+IntRect RenderReplaced::selectionRectForRepaint(RenderBoxModelObject* repaintContainer, bool clipToVisibleContent)
+{
+    ASSERT(!needsLayout());
+
+    if (!isSelected())
+        return IntRect();
+    
+    IntRect rect = localSelectionRect();
+    if (clipToVisibleContent)
+        computeRectForRepaint(repaintContainer, rect);
+    else
+        rect = localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox();
+    
+    return rect;
+}
+
+IntRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const
+{
+    if (checkWhetherSelected && !isSelected())
+        return IntRect();
+
+    if (!m_inlineBoxWrapper)
+        // We're a block-level replaced element.  Just return our own dimensions.
+        return IntRect(0, 0, width(), height());
+    
+    RootInlineBox* root = m_inlineBoxWrapper->root();
+    int newLogicalTop = root->block()->style()->isFlippedBlocksWritingMode() ? m_inlineBoxWrapper->logicalBottom() - root->selectionBottom() : root->selectionTop() - m_inlineBoxWrapper->logicalTop();
+    if (root->block()->style()->isHorizontalWritingMode())
+        return IntRect(0, newLogicalTop, width(), root->selectionHeight());
+    return IntRect(newLogicalTop, 0, root->selectionHeight(), height());
+}
+
+void RenderReplaced::setSelectionState(SelectionState s)
+{
+    RenderBox::setSelectionState(s); // The selection state for our containing block hierarchy is updated by the base class call.
+    if (m_inlineBoxWrapper) {
+        RootInlineBox* line = m_inlineBoxWrapper->root();
+        if (line)
+            line->setHasSelectedChildren(isSelected());
+    }
+}
+
+bool RenderReplaced::isSelected() const
+{
+    SelectionState s = selectionState();
+    if (s == SelectionNone)
+        return false;
+    if (s == SelectionInside)
+        return true;
+
+    int selectionStart, selectionEnd;
+    selectionStartEnd(selectionStart, selectionEnd);
+    if (s == SelectionStart)
+        return selectionStart == 0;
+        
+    int end = node()->hasChildNodes() ? node()->childNodeCount() : 1;
+    if (s == SelectionEnd)
+        return selectionEnd == end;
+    if (s == SelectionBoth)
+        return selectionStart == 0 && selectionEnd == end;
+        
+    ASSERT(0);
+    return false;
+}
+
+IntSize RenderReplaced::intrinsicSize() const
+{
+    return m_intrinsicSize;
+}
+
+void RenderReplaced::setIntrinsicSize(const IntSize& size)
+{
+    ASSERT(m_hasIntrinsicSize);
+    m_intrinsicSize = size;
+}
+
+IntRect RenderReplaced::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)
+{
+    if (style()->visibility() != VISIBLE && !enclosingLayer()->hasVisibleContent())
+        return IntRect();
+
+    // The selectionRect can project outside of the overflowRect, so take their union
+    // for repainting to avoid selection painting glitches.
+    IntRect r = unionRect(localSelectionRect(false), visualOverflowRect());
+
+    RenderView* v = view();
+    if (v) {
+        // FIXME: layoutDelta needs to be applied in parts before/after transforms and
+        // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308
+        r.move(v->layoutDelta());
+    }
+
+    if (style()) {
+        if (style()->hasAppearance())
+            // The theme may wish to inflate the rect used when repainting.
+            theme()->adjustRepaintRect(this, r);
+        if (v)
+            r.inflate(style()->outlineSize());
+    }
+    computeRectForRepaint(repaintContainer, r);
+    return r;
+}
+
+}