external/webkit r30707

1 files changed, 363 insertions, 0 deletions

diff --git a/WebCore/rendering/RenderReplaced.cpp b/WebCore/rendering/RenderReplaced.cpp
new file mode 100644
index 0000000..32d6332
--- /dev/null
+++ b/WebCore/rendering/RenderReplaced.cpp
@@ -0,0 +1,363 @@
+/*
+ * 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"
+
+using namespace std;
+
+namespace WebCore {
+
+typedef WTF::HashMap<const RenderReplaced*, IntRect> OverflowRectMap;
+static OverflowRectMap* gOverflowRectMap = 0;
+
+RenderReplaced::RenderReplaced(Node* node)
+    : RenderBox(node)
+    , m_intrinsicSize(300, 150)
+    , m_selectionState(SelectionNone)
+    , m_hasOverflow(false)
+{
+    setReplaced(true);
+}
+
+RenderReplaced::RenderReplaced(Node* node, const IntSize& intrinsicSize)
+    : RenderBox(node)
+    , m_intrinsicSize(intrinsicSize)
+    , m_selectionState(SelectionNone)
+    , m_hasOverflow(false)
+{
+    setReplaced(true);
+}
+
+RenderReplaced::~RenderReplaced()
+{
+    if (m_hasOverflow)
+        gOverflowRectMap->remove(this);
+}
+    
+void RenderReplaced::layout()
+{
+    ASSERT(needsLayout());
+    
+    IntRect oldBounds;
+    IntRect oldOutlineBox;
+    bool checkForRepaint = checkForRepaintDuringLayout();
+    if (checkForRepaint) {
+        oldBounds = absoluteClippedOverflowRect();
+        oldOutlineBox = absoluteOutlineBox();
+    }
+    
+    m_height = minimumReplacedHeight();
+    
+    calcWidth();
+    calcHeight();
+    adjustOverflowForBoxShadow();
+    
+    if (checkForRepaint)
+        repaintAfterLayoutIfNeeded(oldBounds, oldOutlineBox);
+    
+    setNeedsLayout(false);
+}
+    
+void RenderReplaced::paint(PaintInfo& paintInfo, int tx, int ty)
+{
+    if (!shouldPaint(paintInfo, tx, ty))
+        return;
+    
+    tx += m_x;
+    ty += m_y;
+    
+    if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 
+        paintBoxDecorations(paintInfo, tx, ty);
+    
+    if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && style()->visibility() == VISIBLE)
+        paintOutline(paintInfo.context, tx, ty, width(), height(), style());
+    
+    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection)
+        return;
+    
+    if (!shouldPaintWithinRoot(paintInfo))
+        return;
+    
+    bool drawSelectionTint = selectionState() != SelectionNone && !document()->printing();
+    if (paintInfo.phase == PaintPhaseSelection) {
+        if (selectionState() == SelectionNone)
+            return;
+        drawSelectionTint = false;
+    }
+
+    paintReplaced(paintInfo, tx, ty);
+    
+    if (drawSelectionTint)
+        paintInfo.context->fillRect(selectionRect(), selectionBackgroundColor());
+}
+
+bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, int& tx, int& ty)
+{
+    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseOutline && paintInfo.phase != PaintPhaseSelfOutline 
+            && paintInfo.phase != PaintPhaseSelection)
+        return false;
+
+    if (!shouldPaintWithinRoot(paintInfo))
+        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 + m_x;
+    int currentTY = ty + m_y;
+
+    // Early exit if the element touches the edges.
+    int top = currentTY + overflowTop();
+    int bottom = currentTY + overflowHeight();
+    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 + overflowLeft() >= paintInfo.rect.right() + os || currentTX + overflowWidth() <= paintInfo.rect.x() - os)
+        return false;
+    if (top >= paintInfo.rect.bottom() + os || bottom <= paintInfo.rect.y() - os)
+        return false;
+
+    return true;
+}
+
+void RenderReplaced::calcPrefWidths()
+{
+    ASSERT(prefWidthsDirty());
+
+    int width = calcReplacedWidth() + paddingLeft() + paddingRight() + borderLeft() + borderRight();
+    if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent())) {
+        m_minPrefWidth = 0;
+        m_maxPrefWidth = width;
+    } else
+        m_minPrefWidth = m_maxPrefWidth = width;
+
+    setPrefWidthsDirty(false);
+}
+
+short RenderReplaced::lineHeight(bool, bool) const
+{
+    return height() + marginTop() + marginBottom();
+}
+
+short RenderReplaced::baselinePosition(bool, bool) const
+{
+    return height() + marginTop() + marginBottom();
+}
+
+int RenderReplaced::caretMinOffset() const 
+{ 
+    return 0; 
+}
+
+// Returns 1 since a replaced element can have the caret positioned 
+// at its beginning (0), or at its end (1).
+// NOTE: Yet, "select" elements can have any number of "option" elements
+// as children, so this "0 or 1" idea does not really hold up.
+int RenderReplaced::caretMaxOffset() const 
+{ 
+    return 1; 
+}
+
+unsigned RenderReplaced::caretMaxRenderedOffset() const
+{
+    return 1; 
+}
+
+VisiblePosition RenderReplaced::positionForCoordinates(int x, int y)
+{
+    InlineBox* box = inlineBoxWrapper();
+    if (!box)
+        return VisiblePosition(element(), 0, DOWNSTREAM);
+
+    // FIXME: This code is buggy if the replaced element is relative positioned.
+
+    RootInlineBox* root = box->root();
+
+    int top = root->topOverflow();
+    int bottom = root->nextRootBox() ? root->nextRootBox()->topOverflow() : root->bottomOverflow();
+
+    if (y + yPos() < top)
+        return VisiblePosition(element(), caretMinOffset(), DOWNSTREAM); // coordinates are above
+    
+    if (y + yPos() >= bottom)
+        return VisiblePosition(element(), caretMaxOffset(), DOWNSTREAM); // coordinates are below
+    
+    if (element()) {
+        if (x <= width() / 2)
+            return VisiblePosition(element(), 0, DOWNSTREAM);
+        return VisiblePosition(element(), 1, DOWNSTREAM);
+    }
+
+    return RenderBox::positionForCoordinates(x, y);
+}
+
+IntRect RenderReplaced::selectionRect(bool clipToVisibleContent)
+{
+    ASSERT(!needsLayout());
+
+    if (!isSelected())
+        return IntRect();
+    if (!m_inlineBoxWrapper)
+        // We're a block-level replaced element.  Just return our own dimensions.
+        return absoluteBoundingBoxRect();
+
+    RenderBlock* cb =  containingBlock();
+    if (!cb)
+        return IntRect();
+    
+    RootInlineBox* root = m_inlineBoxWrapper->root();
+    IntRect rect(0, root->selectionTop() - yPos(), width(), root->selectionHeight());
+    
+    if (clipToVisibleContent)
+        computeAbsoluteRepaintRect(rect);
+    else {
+        int absx, absy;
+        absolutePositionForContent(absx, absy);
+        rect.move(absx, absy);
+    }
+    
+    return rect;
+}
+
+void RenderReplaced::setSelectionState(SelectionState s)
+{
+    m_selectionState = s;
+    if (m_inlineBoxWrapper) {
+        RootInlineBox* line = m_inlineBoxWrapper->root();
+        if (line)
+            line->setHasSelectedChildren(isSelected());
+    }
+    
+    containingBlock()->setSelectionState(s);
+}
+
+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 = element()->hasChildNodes() ? element()->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)
+{
+    m_intrinsicSize = size;
+}
+
+void RenderReplaced::adjustOverflowForBoxShadow()
+{
+    if (ShadowData* boxShadow = style()->boxShadow()) {
+        if (!gOverflowRectMap)
+            gOverflowRectMap = new OverflowRectMap();
+
+        IntRect shadow = borderBox();
+        shadow.move(boxShadow->x, boxShadow->y);
+        shadow.inflate(boxShadow->blur);
+        shadow.unite(borderBox());
+
+        gOverflowRectMap->set(this, shadow);
+        m_hasOverflow = true;
+        return;
+    }
+
+    if (m_hasOverflow) {
+        gOverflowRectMap->remove(this);
+        m_hasOverflow = false;
+    }
+}
+
+int RenderReplaced::overflowHeight(bool includeInterior) const
+{
+    if (m_hasOverflow) {
+        IntRect *r = &gOverflowRectMap->find(this)->second;
+        return r->height() + r->y();
+    }
+
+    return height();
+}
+
+int RenderReplaced::overflowWidth(bool includeInterior) const
+{
+    if (m_hasOverflow) {
+        IntRect *r = &gOverflowRectMap->find(this)->second;
+        return r->width() + r->x();
+    }
+
+    return width();
+}
+
+int RenderReplaced::overflowLeft(bool includeInterior) const
+{
+    if (m_hasOverflow)
+        return gOverflowRectMap->get(this).x();
+
+    return 0;
+}
+
+int RenderReplaced::overflowTop(bool includeInterior) const
+{
+    if (m_hasOverflow)
+        return gOverflowRectMap->get(this).y();
+
+    return 0;
+}
+
+IntRect RenderReplaced::overflowRect(bool includeInterior) const
+{
+    if (m_hasOverflow)
+        return gOverflowRectMap->find(this)->second;
+
+    return borderBox();
+}
+
+}