rootinlinebox.cpp

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    m_blockHeight += dy;
}

void RootInlineBox::childRemoved(InlineBox* box)
{
    if (box->renderer() == m_lineBreakObj)
        setLineBreakInfo(0, 0, BidiStatus());

    for (RootInlineBox* prev = prevRootBox(); prev && prev->lineBreakObj() == box->renderer(); 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()->renderer(),
                                                       firstBox->x(), selTop, selHeight,
                                                       rootBlock, blockX, blockY, tx, ty, paintInfo));
    if (rightGap)
        result.uniteRight(block()->fillRightSelectionGap(lastBox->parent()->renderer(),
                                                         lastBox->x() + lastBox->width(), selTop, selHeight,
                                                         rootBlock, blockX, blockY, tx, ty, paintInfo));

    // When dealing with bidi text, a non-contiguous selection region is possible.
    // e.g. The logical text aaaAAAbbb (capitals denote RTL text and non-capitals LTR) is layed out
    // visually as 3 text runs |aaa|bbb|AAA| if we select 4 characters from the start of the text the
    // selection will look like (underline denotes selection):
    // |aaa|bbb|AAA|
    //  ___       _
    // We can see that the |bbb| run is not part of the selection while the runs around it are.
    if (firstBox && firstBox != lastBox) {
        // Now fill in any gaps on the line that occurred between two selected elements.
        int lastX = firstBox->x() + firstBox->width();
        bool isPreviousBoxSelected = firstBox->selectionState() != RenderObject::SelectionNone;
        for (InlineBox* box = firstBox->nextLeafChild(); box; box = box->nextLeafChild()) {
            if (box->selectionState() != RenderObject::SelectionNone) {
                if (isPreviousBoxSelected)  // VisibleSelection may be non-contiguous, see comment above.
                    result.uniteCenter(block()->fillHorizontalSelectionGap(box->parent()->renderer(),
                                                                           lastX + tx, selTop + ty,
                                                                           box->x() - lastX, selHeight, paintInfo));
                lastX = box->x() + box->width();
            }
            if (box == lastBox)
                break;
            isPreviousBoxSelected = box->selectionState() != RenderObject::SelectionNone;
        }
    }

    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, !prevRootBox());
        int prevRight = block()->rightOffset(prevBottom, !prevRootBox());
        int newLeft = block()->leftOffset(selectionTop, !prevRootBox());
        int newRight = block()->rightOffset(selectionTop, !prevRootBox());
        if (prevLeft > newLeft || prevRight < newRight)
            return selectionTop;
    }

    return prevBottom;
}

RenderBlock* RootInlineBox::block() const
{
    return toRenderBlock(renderer());
}

static bool isEditableLeaf(InlineBox* leaf)
{
    return leaf && leaf->renderer() && leaf->renderer()->node() && leaf->renderer()->node()->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->renderer()->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->renderer()->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->renderer()->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) {
        const Font& font = renderer()->style(m_firstLine)->font();
        if (top == m_y && bottom == m_y + font.height())
            return;
        m_overflow = new (renderer()->renderArena()) Overflow(this);
    }
    m_overflow->m_topOverflow = top; 
    m_overflow->m_bottomOverflow = bottom; 
}

void RootInlineBox::removeLineBoxFromRenderObject()
{
    block()->lineBoxes()->removeLineBox(this);
}

void RootInlineBox::extractLineBoxFromRenderObject()
{
    block()->lineBoxes()->extractLineBox(this);
}

void RootInlineBox::attachLineBoxToRenderObject()
{
    block()->lineBoxes()->attachLineBox(this);
}

} // namespace WebCore