| /* |
| * Copyright (C) 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "RenderLineBoxList.h" |
| |
| #include "HitTestResult.h" |
| #include "InlineTextBox.h" |
| #include "PaintInfo.h" |
| #include "RenderArena.h" |
| #include "RenderBlockFlow.h" |
| #include "RenderInline.h" |
| #include "RenderLineBreak.h" |
| #include "RenderView.h" |
| #include "RootInlineBox.h" |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| #ifndef NDEBUG |
| RenderLineBoxList::~RenderLineBoxList() |
| { |
| ASSERT(!m_firstLineBox); |
| ASSERT(!m_lastLineBox); |
| } |
| #endif |
| |
| void RenderLineBoxList::appendLineBox(InlineFlowBox* box) |
| { |
| checkConsistency(); |
| |
| if (!m_firstLineBox) |
| m_firstLineBox = m_lastLineBox = box; |
| else { |
| m_lastLineBox->setNextLineBox(box); |
| box->setPreviousLineBox(m_lastLineBox); |
| m_lastLineBox = box; |
| } |
| |
| checkConsistency(); |
| } |
| |
| void RenderLineBoxList::deleteLineBoxTree() |
| { |
| InlineFlowBox* line = m_firstLineBox; |
| InlineFlowBox* nextLine; |
| while (line) { |
| nextLine = line->nextLineBox(); |
| line->deleteLine(); |
| line = nextLine; |
| } |
| m_firstLineBox = m_lastLineBox = 0; |
| } |
| |
| void RenderLineBoxList::extractLineBox(InlineFlowBox* box) |
| { |
| checkConsistency(); |
| |
| m_lastLineBox = box->prevLineBox(); |
| if (box == m_firstLineBox) |
| m_firstLineBox = 0; |
| if (box->prevLineBox()) |
| box->prevLineBox()->setNextLineBox(0); |
| box->setPreviousLineBox(0); |
| for (InlineFlowBox* curr = box; curr; curr = curr->nextLineBox()) |
| curr->setExtracted(); |
| |
| checkConsistency(); |
| } |
| |
| void RenderLineBoxList::attachLineBox(InlineFlowBox* box) |
| { |
| checkConsistency(); |
| |
| if (m_lastLineBox) { |
| m_lastLineBox->setNextLineBox(box); |
| box->setPreviousLineBox(m_lastLineBox); |
| } else |
| m_firstLineBox = box; |
| InlineFlowBox* last = box; |
| for (InlineFlowBox* curr = box; curr; curr = curr->nextLineBox()) { |
| curr->setExtracted(false); |
| last = curr; |
| } |
| m_lastLineBox = last; |
| |
| checkConsistency(); |
| } |
| |
| void RenderLineBoxList::removeLineBox(InlineFlowBox* box) |
| { |
| checkConsistency(); |
| |
| if (box == m_firstLineBox) |
| m_firstLineBox = box->nextLineBox(); |
| if (box == m_lastLineBox) |
| m_lastLineBox = box->prevLineBox(); |
| if (box->nextLineBox()) |
| box->nextLineBox()->setPreviousLineBox(box->prevLineBox()); |
| if (box->prevLineBox()) |
| box->prevLineBox()->setNextLineBox(box->nextLineBox()); |
| |
| checkConsistency(); |
| } |
| |
| void RenderLineBoxList::deleteLineBoxes() |
| { |
| if (m_firstLineBox) { |
| InlineFlowBox* next; |
| for (InlineFlowBox* curr = m_firstLineBox; curr; curr = next) { |
| next = curr->nextLineBox(); |
| delete curr; |
| } |
| m_firstLineBox = 0; |
| m_lastLineBox = 0; |
| } |
| } |
| |
| void RenderLineBoxList::dirtyLineBoxes() |
| { |
| for (InlineFlowBox* curr = firstLineBox(); curr; curr = curr->nextLineBox()) |
| curr->dirtyLineBoxes(); |
| } |
| |
| bool RenderLineBoxList::rangeIntersectsRect(RenderBoxModelObject* renderer, LayoutUnit logicalTop, LayoutUnit logicalBottom, const LayoutRect& rect, const LayoutPoint& offset) const |
| { |
| RenderBox* block; |
| if (renderer->isBox()) |
| block = toRenderBox(renderer); |
| else |
| block = renderer->containingBlock(); |
| LayoutUnit physicalStart = block->flipForWritingMode(logicalTop); |
| LayoutUnit physicalEnd = block->flipForWritingMode(logicalBottom); |
| LayoutUnit physicalExtent = absoluteValue(physicalEnd - physicalStart); |
| physicalStart = min(physicalStart, physicalEnd); |
| |
| if (renderer->style().isHorizontalWritingMode()) { |
| physicalStart += offset.y(); |
| if (physicalStart >= rect.maxY() || physicalStart + physicalExtent <= rect.y()) |
| return false; |
| } else { |
| physicalStart += offset.x(); |
| if (physicalStart >= rect.maxX() || physicalStart + physicalExtent <= rect.x()) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool RenderLineBoxList::anyLineIntersectsRect(RenderBoxModelObject* renderer, const LayoutRect& rect, const LayoutPoint& offset, bool usePrintRect, LayoutUnit outlineSize) const |
| { |
| // We can check the first box and last box and avoid painting/hit testing if we don't |
| // intersect. This is a quick short-circuit that we can take to avoid walking any lines. |
| // FIXME: This check is flawed in the following extremely obscure way: |
| // if some line in the middle has a huge overflow, it might actually extend below the last line. |
| const RootInlineBox& firstRootBox = firstLineBox()->root(); |
| const RootInlineBox& lastRootBox = lastLineBox()->root(); |
| LayoutUnit firstLineTop = firstLineBox()->logicalTopVisualOverflow(firstRootBox.lineTop()); |
| if (usePrintRect && !firstLineBox()->parent()) |
| firstLineTop = min(firstLineTop, firstRootBox.lineTop()); |
| LayoutUnit lastLineBottom = lastLineBox()->logicalBottomVisualOverflow(lastRootBox.lineBottom()); |
| if (usePrintRect && !lastLineBox()->parent()) |
| lastLineBottom = max(lastLineBottom, lastRootBox.lineBottom()); |
| LayoutUnit logicalTop = firstLineTop - outlineSize; |
| LayoutUnit logicalBottom = outlineSize + lastLineBottom; |
| |
| return rangeIntersectsRect(renderer, logicalTop, logicalBottom, rect, offset); |
| } |
| |
| bool RenderLineBoxList::lineIntersectsDirtyRect(RenderBoxModelObject* renderer, InlineFlowBox* box, const PaintInfo& paintInfo, const LayoutPoint& offset) const |
| { |
| const RootInlineBox& rootBox = box->root(); |
| LayoutUnit logicalTop = min<LayoutUnit>(box->logicalTopVisualOverflow(rootBox.lineTop()), rootBox.selectionTop()) - renderer->maximalOutlineSize(paintInfo.phase); |
| LayoutUnit logicalBottom = box->logicalBottomVisualOverflow(rootBox.lineBottom()) + renderer->maximalOutlineSize(paintInfo.phase); |
| |
| return rangeIntersectsRect(renderer, logicalTop, logicalBottom, paintInfo.rect, offset); |
| } |
| |
| void RenderLineBoxList::paint(RenderBoxModelObject* renderer, PaintInfo& paintInfo, const LayoutPoint& paintOffset) const |
| { |
| // Only paint during the foreground/selection phases. |
| if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseOutline |
| && paintInfo.phase != PaintPhaseSelfOutline && paintInfo.phase != PaintPhaseChildOutlines && paintInfo.phase != PaintPhaseTextClip |
| && paintInfo.phase != PaintPhaseMask) |
| return; |
| |
| ASSERT(renderer->isRenderBlock() || (renderer->isRenderInline() && renderer->hasLayer())); // The only way an inline could paint like this is if it has a layer. |
| |
| // If we have no lines then we have no work to do. |
| if (!firstLineBox()) |
| return; |
| |
| // FIXME: Paint-time pagination is obsolete and is now only used by embedded WebViews inside AppKit |
| // NSViews. Do not add any more code for this. |
| RenderView& v = renderer->view(); |
| bool usePrintRect = !v.printRect().isEmpty(); |
| LayoutUnit outlineSize = renderer->maximalOutlineSize(paintInfo.phase); |
| if (!anyLineIntersectsRect(renderer, paintInfo.rect, paintOffset, usePrintRect, outlineSize)) |
| return; |
| |
| PaintInfo info(paintInfo); |
| ListHashSet<RenderInline*> outlineObjects; |
| info.outlineObjects = &outlineObjects; |
| |
| // See if our root lines intersect with the dirty rect. If so, then we paint |
| // them. Note that boxes can easily overlap, so we can't make any assumptions |
| // based off positions of our first line box or our last line box. |
| for (InlineFlowBox* curr = firstLineBox(); curr; curr = curr->nextLineBox()) { |
| if (usePrintRect) { |
| // FIXME: This is the deprecated pagination model that is still needed |
| // for embedded views inside AppKit. AppKit is incapable of paginating vertical |
| // text pages, so we don't have to deal with vertical lines at all here. |
| const RootInlineBox& rootBox = curr->root(); |
| LayoutUnit topForPaginationCheck = curr->logicalTopVisualOverflow(rootBox.lineTop()); |
| LayoutUnit bottomForPaginationCheck = curr->logicalLeftVisualOverflow(); |
| if (!curr->parent()) { |
| // We're a root box. Use lineTop and lineBottom as well here. |
| topForPaginationCheck = min(topForPaginationCheck, rootBox.lineTop()); |
| bottomForPaginationCheck = max(bottomForPaginationCheck, rootBox.lineBottom()); |
| } |
| if (bottomForPaginationCheck - topForPaginationCheck <= v.printRect().height()) { |
| if (paintOffset.y() + bottomForPaginationCheck > v.printRect().maxY()) { |
| if (RootInlineBox* nextRootBox = rootBox.nextRootBox()) |
| bottomForPaginationCheck = min(bottomForPaginationCheck, min<LayoutUnit>(nextRootBox->logicalTopVisualOverflow(), nextRootBox->lineTop())); |
| } |
| if (paintOffset.y() + bottomForPaginationCheck > v.printRect().maxY()) { |
| if (paintOffset.y() + topForPaginationCheck < v.truncatedAt()) |
| v.setBestTruncatedAt(paintOffset.y() + topForPaginationCheck, renderer); |
| // If we were able to truncate, don't paint. |
| if (paintOffset.y() + topForPaginationCheck >= v.truncatedAt()) |
| break; |
| } |
| } |
| } |
| |
| if (lineIntersectsDirtyRect(renderer, curr, info, paintOffset)) { |
| const RootInlineBox& rootBox = curr->root(); |
| curr->paint(info, paintOffset, rootBox.lineTop(), rootBox.lineBottom()); |
| } |
| } |
| |
| if (info.phase == PaintPhaseOutline || info.phase == PaintPhaseSelfOutline || info.phase == PaintPhaseChildOutlines) { |
| ListHashSet<RenderInline*>::iterator end = info.outlineObjects->end(); |
| for (ListHashSet<RenderInline*>::iterator it = info.outlineObjects->begin(); it != end; ++it) { |
| RenderInline* flow = *it; |
| flow->paintOutline(info, paintOffset); |
| } |
| info.outlineObjects->clear(); |
| } |
| } |
| |
| bool RenderLineBoxList::hitTest(RenderBoxModelObject* renderer, const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction) const |
| { |
| if (hitTestAction != HitTestForeground) |
| return false; |
| |
| ASSERT(renderer->isRenderBlock() || (renderer->isRenderInline() && renderer->hasLayer())); // The only way an inline could hit test like this is if it has a layer. |
| |
| // If we have no lines then we have no work to do. |
| if (!firstLineBox()) |
| return false; |
| |
| LayoutPoint point = locationInContainer.point(); |
| LayoutRect rect = firstLineBox()->isHorizontal() ? |
| IntRect(point.x(), point.y() - locationInContainer.topPadding(), 1, locationInContainer.topPadding() + locationInContainer.bottomPadding() + 1) : |
| IntRect(point.x() - locationInContainer.leftPadding(), point.y(), locationInContainer.rightPadding() + locationInContainer.leftPadding() + 1, 1); |
| |
| if (!anyLineIntersectsRect(renderer, rect, accumulatedOffset)) |
| return false; |
| |
| // See if our root lines contain the point. If so, then we hit test |
| // them further. Note that boxes can easily overlap, so we can't make any assumptions |
| // based off positions of our first line box or our last line box. |
| for (InlineFlowBox* curr = lastLineBox(); curr; curr = curr->prevLineBox()) { |
| const RootInlineBox& rootBox = curr->root(); |
| if (rangeIntersectsRect(renderer, curr->logicalTopVisualOverflow(rootBox.lineTop()), curr->logicalBottomVisualOverflow(rootBox.lineBottom()), rect, accumulatedOffset)) { |
| bool inside = curr->nodeAtPoint(request, result, locationInContainer, accumulatedOffset, rootBox.lineTop(), rootBox.lineBottom()); |
| if (inside) { |
| renderer->updateHitTestResult(result, locationInContainer.point() - toLayoutSize(accumulatedOffset)); |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| void RenderLineBoxList::dirtyLinesFromChangedChild(RenderBoxModelObject* container, RenderObject* child) |
| { |
| ASSERT(container->isRenderInline() || container->isRenderBlockFlow()); |
| if (!container->parent() || (container->isRenderBlockFlow() && container->selfNeedsLayout())) |
| return; |
| |
| RenderInline* inlineContainer = container->isRenderInline() ? toRenderInline(container) : 0; |
| InlineBox* firstBox = inlineContainer ? inlineContainer->firstLineBoxIncludingCulling() : firstLineBox(); |
| |
| // If we have no first line box, then just bail early. |
| if (!firstBox) { |
| // For an empty inline, go ahead and propagate the check up to our parent, unless the parent |
| // is already dirty. |
| if (container->isInline() && !container->ancestorLineBoxDirty()) { |
| container->parent()->dirtyLinesFromChangedChild(container); |
| container->setAncestorLineBoxDirty(); // Mark the container to avoid dirtying the same lines again across multiple destroy() calls of the same subtree. |
| } |
| return; |
| } |
| |
| // Try to figure out which line box we belong in. First try to find a previous |
| // line box by examining our siblings. If we didn't find a line box, then use our |
| // parent's first line box. |
| RootInlineBox* box = 0; |
| RenderObject* curr = 0; |
| for (curr = child->previousSibling(); curr; curr = curr->previousSibling()) { |
| if (curr->isFloatingOrOutOfFlowPositioned()) |
| continue; |
| |
| if (curr->isReplaced()) { |
| InlineBox* wrapper = toRenderBox(curr)->inlineBoxWrapper(); |
| if (wrapper) |
| box = &wrapper->root(); |
| } if (curr->isLineBreak()) { |
| InlineBox* wrapper = toRenderLineBreak(curr)->inlineBoxWrapper(); |
| if (wrapper) |
| box = &wrapper->root(); |
| } else if (curr->isText()) { |
| InlineTextBox* textBox = toRenderText(curr)->lastTextBox(); |
| if (textBox) |
| box = &textBox->root(); |
| } else if (curr->isRenderInline()) { |
| InlineBox* lastSiblingBox = toRenderInline(curr)->lastLineBoxIncludingCulling(); |
| if (lastSiblingBox) |
| box = &lastSiblingBox->root(); |
| } |
| |
| if (box) |
| break; |
| } |
| if (!box) { |
| if (inlineContainer && !inlineContainer->alwaysCreateLineBoxes()) { |
| // https://bugs.webkit.org/show_bug.cgi?id=60778 |
| // We may have just removed a <br> with no line box that was our first child. In this case |
| // we won't find a previous sibling, but firstBox can be pointing to a following sibling. |
| // This isn't good enough, since we won't locate the root line box that encloses the removed |
| // <br>. We have to just over-invalidate a bit and go up to our parent. |
| if (!inlineContainer->ancestorLineBoxDirty()) { |
| inlineContainer->parent()->dirtyLinesFromChangedChild(inlineContainer); |
| inlineContainer->setAncestorLineBoxDirty(); // Mark the container to avoid dirtying the same lines again across multiple destroy() calls of the same subtree. |
| } |
| return; |
| } |
| box = &firstBox->root(); |
| } |
| |
| // If we found a line box, then dirty it. |
| if (box) { |
| RootInlineBox* adjacentBox; |
| box->markDirty(); |
| |
| // dirty the adjacent lines that might be affected |
| // NOTE: we dirty the previous line because RootInlineBox objects cache |
| // the address of the first object on the next line after a BR, which we may be |
| // invalidating here. For more info, see how RenderBlock::layoutInlineChildren |
| // calls setLineBreakInfo with the result of findNextLineBreak. findNextLineBreak, |
| // despite the name, actually returns the first RenderObject after the BR. |
| // <rdar://problem/3849947> "Typing after pasting line does not appear until after window resize." |
| adjacentBox = box->prevRootBox(); |
| if (adjacentBox) |
| adjacentBox->markDirty(); |
| adjacentBox = box->nextRootBox(); |
| // If |child| has been inserted before the first element in the linebox, but after collapsed leading |
| // space, the search for |child|'s linebox will go past the leading space to the previous linebox and select that |
| // one as |box|. If we hit that situation here, dirty the |box| actually containing the child too. |
| bool insertedAfterLeadingSpace = box->lineBreakObj() == child->previousSibling(); |
| if (adjacentBox && (adjacentBox->lineBreakObj() == child || child->isBR() || (curr && curr->isBR()) || insertedAfterLeadingSpace)) |
| adjacentBox->markDirty(); |
| } |
| } |
| |
| #ifndef NDEBUG |
| |
| void RenderLineBoxList::checkConsistency() const |
| { |
| #ifdef CHECK_CONSISTENCY |
| const InlineFlowBox* prev = 0; |
| for (const InlineFlowBox* child = m_firstLineBox; child != 0; child = child->nextLineBox()) { |
| ASSERT(child->prevLineBox() == prev); |
| prev = child; |
| } |
| ASSERT(prev == m_lastLineBox); |
| #endif |
| } |
| |
| #endif |
| |
| } |
