1 files changed, 405 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/rendering/RootInlineBox.cpp b/src/3rdparty/webkit/WebCore/rendering/RootInlineBox.cpp
new file mode 100644
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--- /dev/null
+++ b/src/3rdparty/webkit/WebCore/rendering/RootInlineBox.cpp
@@ -0,0 +1,405 @@
+/*
+ * Copyright (C) 2003, 2006, 2008 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 "RootInlineBox.h"
+
+#include "BidiResolver.h"
+#include "ChromeClient.h"
+#include "Document.h"
+#include "EllipsisBox.h"
+#include "Frame.h"
+#include "GraphicsContext.h"
+#include "HitTestResult.h"
+#include "Page.h"
+#include "RenderArena.h"
+#include "RenderBlock.h"
+
+using namespace std;
+
+namespace WebCore {
+    
+typedef WTF::HashMap<const RootInlineBox*, EllipsisBox*> EllipsisBoxMap;
+static EllipsisBoxMap* gEllipsisBoxMap = 0;
+
+void* RootInlineBox::Overflow::operator new(size_t sz, RenderArena* renderArena) throw()
+{
+    return renderArena->allocate(sz);
+}
+
+void RootInlineBox::Overflow::operator delete(void* ptr, size_t sz)
+{
+    // Stash size where destroy can find it.
+    *(size_t *)ptr = sz;
+}
+
+void RootInlineBox::Overflow::destroy(RenderArena* renderArena)
+{
+    delete this;
+    // Recover the size left there for us by operator delete and free the memory.
+    renderArena->free(*(size_t *)this, this);
+}
+
+void RootInlineBox::destroy(RenderArena* arena)
+{
+    if (m_overflow)
+        m_overflow->destroy(arena);
+    detachEllipsisBox(arena);
+    InlineFlowBox::destroy(arena);
+}
+
+void RootInlineBox::detachEllipsisBox(RenderArena* arena)
+{
+    if (m_hasEllipsisBox) {
+        EllipsisBox* box = gEllipsisBoxMap->take(this);
+        box->setParent(0);
+        box->destroy(arena);
+        m_hasEllipsisBox = false;
+    }
+}
+
+void RootInlineBox::clearTruncation()
+{
+    if (m_hasEllipsisBox) {
+        detachEllipsisBox(m_object->renderArena());
+        InlineFlowBox::clearTruncation();
+    }
+}
+
+bool RootInlineBox::canAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth)
+{
+    // First sanity-check the unoverflowed width of the whole line to see if there is sufficient room.
+    int delta = ltr ? lineBoxEdge - blockEdge : blockEdge - lineBoxEdge;
+    if (width() - delta < ellipsisWidth)
+        return false;
+
+    // Next iterate over all the line boxes on the line.  If we find a replaced element that intersects
+    // then we refuse to accommodate the ellipsis.  Otherwise we're ok.
+    return InlineFlowBox::canAccommodateEllipsis(ltr, blockEdge, ellipsisWidth);
+}
+
+void RootInlineBox::placeEllipsis(const AtomicString& ellipsisStr,  bool ltr, int blockEdge, int ellipsisWidth,
+                                  InlineBox* markupBox)
+{
+    // Create an ellipsis box.
+    EllipsisBox* ellipsisBox = new (m_object->renderArena()) EllipsisBox(m_object, ellipsisStr, this,
+                                                              ellipsisWidth - (markupBox ? markupBox->width() : 0),
+                                                              yPos(), height(), baseline(), !prevRootBox(),
+                                                              markupBox);
+    
+    if (!gEllipsisBoxMap)
+        gEllipsisBoxMap = new EllipsisBoxMap();
+    gEllipsisBoxMap->add(this, ellipsisBox);
+    m_hasEllipsisBox = true;
+
+    if (ltr && (xPos() + width() + ellipsisWidth) <= blockEdge) {
+        ellipsisBox->m_x = xPos() + width();
+        return;
+    }
+
+    // Now attempt to find the nearest glyph horizontally and place just to the right (or left in RTL)
+    // of that glyph.  Mark all of the objects that intersect the ellipsis box as not painting (as being
+    // truncated).
+    bool foundBox = false;
+    ellipsisBox->m_x = placeEllipsisBox(ltr, blockEdge, ellipsisWidth, foundBox);
+}
+
+int RootInlineBox::placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox)
+{
+    int result = InlineFlowBox::placeEllipsisBox(ltr, blockEdge, ellipsisWidth, foundBox);
+    if (result == -1)
+        result = ltr ? blockEdge - ellipsisWidth : blockEdge;
+    return result;
+}
+
+void RootInlineBox::paintEllipsisBox(RenderObject::PaintInfo& paintInfo, int tx, int ty) const
+{
+    if (m_hasEllipsisBox && object()->shouldPaintWithinRoot(paintInfo) && object()->style()->visibility() == VISIBLE &&
+            paintInfo.phase == PaintPhaseForeground)
+        ellipsisBox()->paint(paintInfo, tx, ty);
+}
+
+#if PLATFORM(MAC)
+
+void RootInlineBox::addHighlightOverflow()
+{
+    Frame* frame = object()->document()->frame();
+    if (!frame)
+        return;
+    Page* page = frame->page();
+    if (!page)
+        return;
+
+    // Highlight acts as a selection inflation.
+    FloatRect rootRect(0, selectionTop(), width(), selectionHeight());
+    IntRect inflatedRect = enclosingIntRect(page->chrome()->client()->customHighlightRect(object()->node(), object()->style()->highlight(), rootRect));
+    setHorizontalOverflowPositions(min(leftOverflow(), inflatedRect.x()), max(rightOverflow(), inflatedRect.right()));
+    setVerticalOverflowPositions(min(topOverflow(), inflatedRect.y()), max(bottomOverflow(), inflatedRect.bottom()));
+}
+
+void RootInlineBox::paintCustomHighlight(RenderObject::PaintInfo& paintInfo, int tx, int ty, const AtomicString& highlightType)
+{
+    if (!object()->shouldPaintWithinRoot(paintInfo) || object()->style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseForeground)
+        return;
+
+    Frame* frame = object()->document()->frame();
+    if (!frame)
+        return;
+    Page* page = frame->page();
+    if (!page)
+        return;
+
+    // Get the inflated rect so that we can properly hit test.
+    FloatRect rootRect(tx + xPos(), ty + selectionTop(), width(), selectionHeight());
+    FloatRect inflatedRect = page->chrome()->client()->customHighlightRect(object()->node(), highlightType, rootRect);
+    if (inflatedRect.intersects(paintInfo.rect))
+        page->chrome()->client()->paintCustomHighlight(object()->node(), highlightType, rootRect, rootRect, false, true);
+}
+
+#endif
+
+void RootInlineBox::paint(RenderObject::PaintInfo& paintInfo, int tx, int ty)
+{
+    InlineFlowBox::paint(paintInfo, tx, ty);
+    paintEllipsisBox(paintInfo, tx, ty);
+#if PLATFORM(MAC)
+    RenderStyle* styleToUse = object()->style(m_firstLine);
+    if (styleToUse->highlight() != nullAtom && !paintInfo.context->paintingDisabled())
+        paintCustomHighlight(paintInfo, tx, ty, styleToUse->highlight());
+#endif
+}
+
+bool RootInlineBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty)
+{
+    if (m_hasEllipsisBox && visibleToHitTesting()) {
+        if (ellipsisBox()->nodeAtPoint(request, result, x, y, tx, ty)) {
+            object()->updateHitTestResult(result, IntPoint(x - tx, y - ty));
+            return true;
+        }
+    }
+    return InlineFlowBox::nodeAtPoint(request, result, x, y, tx, ty);
+}
+
+void RootInlineBox::adjustPosition(int dx, int dy)
+{
+    InlineFlowBox::adjustPosition(dx, dy);
+    if (m_overflow) {
+        m_overflow->m_topOverflow += dy;
+        m_overflow->m_bottomOverflow += dy;
+        m_overflow->m_selectionTop += dy;
+        m_overflow->m_selectionBottom += dy;
+    }
+    m_blockHeight += dy;
+}
+
+void RootInlineBox::childRemoved(InlineBox* box)
+{
+    if (box->object() == m_lineBreakObj)
+        setLineBreakInfo(0, 0, BidiStatus());
+
+    for (RootInlineBox* prev = prevRootBox(); prev && prev->lineBreakObj() == box->object(); prev = prev->prevRootBox()) {
+        prev->setLineBreakInfo(0, 0, BidiStatus());
+        prev->markDirty();
+    }
+}
+
+GapRects RootInlineBox::fillLineSelectionGap(int selTop, int selHeight, RenderBlock* rootBlock, int blockX, int blockY, int tx, int ty,
+                                             const RenderObject::PaintInfo* paintInfo)
+{
+    RenderObject::SelectionState lineState = selectionState();
+
+    bool leftGap, rightGap;
+    block()->getHorizontalSelectionGapInfo(lineState, leftGap, rightGap);
+
+    GapRects result;
+
+    InlineBox* firstBox = firstSelectedBox();
+    InlineBox* lastBox = lastSelectedBox();
+    if (leftGap)
+        result.uniteLeft(block()->fillLeftSelectionGap(firstBox->parent()->object(),
+                                                       firstBox->xPos(), selTop, selHeight,
+                                                       rootBlock, blockX, blockY, tx, ty, paintInfo));
+    if (rightGap)
+        result.uniteRight(block()->fillRightSelectionGap(lastBox->parent()->object(),
+                                                         lastBox->xPos() + lastBox->width(), selTop, selHeight,
+                                                         rootBlock, blockX, blockY, tx, ty, paintInfo));
+
+    if (firstBox && firstBox != lastBox) {
+        // Now fill in any gaps on the line that occurred between two selected elements.
+        int lastX = firstBox->xPos() + firstBox->width();
+        for (InlineBox* box = firstBox->nextLeafChild(); box; box = box->nextLeafChild()) {
+            if (box->selectionState() != RenderObject::SelectionNone) {
+                result.uniteCenter(block()->fillHorizontalSelectionGap(box->parent()->object(),
+                                                                       lastX + tx, selTop + ty,
+                                                                       box->xPos() - lastX, selHeight, paintInfo));
+                lastX = box->xPos() + box->width();
+            }
+            if (box == lastBox)
+                break;
+        }
+    }
+
+    return result;
+}
+
+void RootInlineBox::setHasSelectedChildren(bool b)
+{
+    if (m_hasSelectedChildren == b)
+        return;
+    m_hasSelectedChildren = b;
+}
+
+RenderObject::SelectionState RootInlineBox::selectionState()
+{
+    // Walk over all of the selected boxes.
+    RenderObject::SelectionState state = RenderObject::SelectionNone;
+    for (InlineBox* box = firstLeafChild(); box; box = box->nextLeafChild()) {
+        RenderObject::SelectionState boxState = box->selectionState();
+        if ((boxState == RenderObject::SelectionStart && state == RenderObject::SelectionEnd) ||
+            (boxState == RenderObject::SelectionEnd && state == RenderObject::SelectionStart))
+            state = RenderObject::SelectionBoth;
+        else if (state == RenderObject::SelectionNone ||
+                 ((boxState == RenderObject::SelectionStart || boxState == RenderObject::SelectionEnd) &&
+                  (state == RenderObject::SelectionNone || state == RenderObject::SelectionInside)))
+            state = boxState;
+        if (state == RenderObject::SelectionBoth)
+            break;
+    }
+
+    return state;
+}
+
+InlineBox* RootInlineBox::firstSelectedBox()
+{
+    for (InlineBox* box = firstLeafChild(); box; box = box->nextLeafChild()) {
+        if (box->selectionState() != RenderObject::SelectionNone)
+            return box;
+    }
+
+    return 0;
+}
+
+InlineBox* RootInlineBox::lastSelectedBox()
+{
+    for (InlineBox* box = lastLeafChild(); box; box = box->prevLeafChild()) {
+        if (box->selectionState() != RenderObject::SelectionNone)
+            return box;
+    }
+
+    return 0;
+}
+
+int RootInlineBox::selectionTop()
+{
+    int selectionTop = m_overflow ? m_overflow->m_selectionTop : m_y;
+    if (!prevRootBox())
+        return selectionTop;
+
+    int prevBottom = prevRootBox()->selectionBottom();
+    if (prevBottom < selectionTop && block()->containsFloats()) {
+        // This line has actually been moved further down, probably from a large line-height, but possibly because the
+        // line was forced to clear floats.  If so, let's check the offsets, and only be willing to use the previous
+        // line's bottom overflow if the offsets are greater on both sides.
+        int prevLeft = block()->leftOffset(prevBottom);
+        int prevRight = block()->rightOffset(prevBottom);
+        int newLeft = block()->leftOffset(selectionTop);
+        int newRight = block()->rightOffset(selectionTop);
+        if (prevLeft > newLeft || prevRight < newRight)
+            return selectionTop;
+    }
+
+    return prevBottom;
+}
+
+RenderBlock* RootInlineBox::block() const
+{
+    return static_cast<RenderBlock*>(m_object);
+}
+
+bool isEditableLeaf(InlineBox* leaf)
+{
+    return leaf && leaf->object() && leaf->object()->element() && leaf->object()->element()->isContentEditable();
+}
+
+InlineBox* RootInlineBox::closestLeafChildForXPos(int x, bool onlyEditableLeaves)
+{
+    InlineBox* firstLeaf = firstLeafChildAfterBox();
+    InlineBox* lastLeaf = lastLeafChildBeforeBox();
+    if (firstLeaf == lastLeaf && (!onlyEditableLeaves || isEditableLeaf(firstLeaf)))
+        return firstLeaf;
+
+    // Avoid returning a list marker when possible.
+    if (x <= firstLeaf->m_x && !firstLeaf->object()->isListMarker() && (!onlyEditableLeaves || isEditableLeaf(firstLeaf)))
+        // The x coordinate is less or equal to left edge of the firstLeaf.
+        // Return it.
+        return firstLeaf;
+
+    if (x >= lastLeaf->m_x + lastLeaf->m_width && !lastLeaf->object()->isListMarker() && (!onlyEditableLeaves || isEditableLeaf(lastLeaf)))
+        // The x coordinate is greater or equal to right edge of the lastLeaf.
+        // Return it.
+        return lastLeaf;
+
+    InlineBox* closestLeaf = 0;
+    for (InlineBox* leaf = firstLeaf; leaf; leaf = leaf->nextLeafChild()) {
+        if (!leaf->object()->isListMarker() && (!onlyEditableLeaves || isEditableLeaf(leaf))) {
+            closestLeaf = leaf;
+            if (x < leaf->m_x + leaf->m_width)
+                // The x coordinate is less than the right edge of the box.
+                // Return it.
+                return leaf;
+        }
+    }
+
+    return closestLeaf ? closestLeaf : lastLeaf;
+}
+
+BidiStatus RootInlineBox::lineBreakBidiStatus() const
+{ 
+    return BidiStatus(m_lineBreakBidiStatusEor, m_lineBreakBidiStatusLastStrong, m_lineBreakBidiStatusLast, m_lineBreakContext);
+}
+
+void RootInlineBox::setLineBreakInfo(RenderObject* obj, unsigned breakPos, const BidiStatus& status)
+{
+    m_lineBreakObj = obj;
+    m_lineBreakPos = breakPos;
+    m_lineBreakBidiStatusEor = status.eor;
+    m_lineBreakBidiStatusLastStrong = status.lastStrong;
+    m_lineBreakBidiStatusLast = status.last;
+    m_lineBreakContext = status.context;
+}
+
+EllipsisBox* RootInlineBox::ellipsisBox() const
+{
+    if (!m_hasEllipsisBox)
+        return false;
+    return gEllipsisBoxMap->get(this);
+}
+
+void RootInlineBox::setVerticalOverflowPositions(int top, int bottom) 
+{ 
+    if (!m_overflow) {
+        if (top == m_y && bottom == m_y + m_height)
+            return;
+        m_overflow = new (m_object->renderArena()) Overflow(this);
+    }
+    m_overflow->m_topOverflow = top; 
+    m_overflow->m_bottomOverflow = bottom; 
+}
+
+} // namespace WebCore