| /* |
| * 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 "RenderArena.h" |
| #include "RenderInline.h" |
| #include "RenderView.h" |
| #include "RootInlineBox.h" |
| #include "Settings.h" // FIXME: This include can be removed when paginateDuringLayoutEnabled is taken out. |
| |
| 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(RenderArena* arena) |
| { |
| InlineFlowBox* line = m_firstLineBox; |
| InlineFlowBox* nextLine; |
| while (line) { |
| nextLine = line->nextLineBox(); |
| line->deleteLine(arena); |
| 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(RenderArena* arena) |
| { |
| if (m_firstLineBox) { |
| InlineFlowBox* next; |
| for (InlineFlowBox* curr = m_firstLineBox; curr; curr = next) { |
| next = curr->nextLineBox(); |
| curr->destroy(arena); |
| } |
| m_firstLineBox = 0; |
| m_lastLineBox = 0; |
| } |
| } |
| |
| void RenderLineBoxList::dirtyLineBoxes() |
| { |
| for (InlineFlowBox* curr = firstLineBox(); curr; curr = curr->nextLineBox()) |
| curr->dirtyLineBoxes(); |
| } |
| |
| void RenderLineBoxList::paint(RenderBoxModelObject* renderer, PaintInfo& paintInfo, int tx, int ty) 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; |
| |
| RenderView* v = renderer->view(); |
| bool usePrintRect = !v->printRect().isEmpty() && !renderer->document()->settings()->paginateDuringLayoutEnabled(); |
| |
| // We can check the first box and last box and avoid painting 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. |
| int firstLineTop = firstLineBox()->topVisibleOverflow(); |
| if (usePrintRect && !firstLineBox()->parent()) |
| firstLineTop = min(firstLineTop, firstLineBox()->root()->lineTop()); |
| int lastLineBottom = lastLineBox()->bottomVisibleOverflow(); |
| if (usePrintRect && !lastLineBox()->parent()) |
| lastLineBottom = max(lastLineBottom, lastLineBox()->root()->lineBottom()); |
| int yPos = firstLineTop - renderer->maximalOutlineSize(paintInfo.phase); |
| int h = renderer->maximalOutlineSize(paintInfo.phase) + lastLineBottom - yPos; |
| yPos += ty; |
| if (yPos >= paintInfo.rect.bottom() || yPos + h <= paintInfo.rect.y()) |
| 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 a feeble effort to avoid splitting a line across two pages. |
| // It is utterly inadequate, and this should not be done at paint time at all. |
| // The whole way objects break across pages needs to be redone. |
| // Try to avoid splitting a line vertically, but only if it's less than the height |
| // of the entire page. |
| int topForPaginationCheck = curr->topVisibleOverflow(); |
| int bottomForPaginationCheck = curr->bottomVisibleOverflow(); |
| if (!curr->parent()) { |
| // We're a root box. Use lineTop and lineBottom as well here. |
| topForPaginationCheck = min(topForPaginationCheck, curr->root()->lineTop()); |
| bottomForPaginationCheck = max(bottomForPaginationCheck, curr->root()->lineBottom()); |
| } |
| if (bottomForPaginationCheck - topForPaginationCheck <= v->printRect().height()) { |
| if (ty + bottomForPaginationCheck > v->printRect().bottom()) { |
| if (ty + topForPaginationCheck < v->truncatedAt()) |
| v->setBestTruncatedAt(ty + topForPaginationCheck, renderer); |
| // If we were able to truncate, don't paint. |
| if (ty + topForPaginationCheck >= v->truncatedAt()) |
| break; |
| } |
| } |
| } |
| |
| int top = min(curr->topVisibleOverflow(), curr->root()->selectionTop()) - renderer->maximalOutlineSize(info.phase); |
| int bottom = curr->bottomVisibleOverflow() + renderer->maximalOutlineSize(info.phase); |
| h = bottom - top; |
| yPos = ty + top; |
| v->setMinimumColumnHeight(h); |
| if (yPos < info.rect.bottom() && yPos + h > info.rect.y()) |
| curr->paint(info, tx, ty); |
| } |
| |
| 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.context, tx, ty); |
| } |
| info.outlineObjects->clear(); |
| } |
| } |
| |
| |
| bool RenderLineBoxList::hitTest(RenderBoxModelObject* renderer, const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty, 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; |
| |
| // We can check the first box and last box and avoid hit testing if we don't |
| // contain the point. 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. |
| if (y - result.paddingHeight() >= ty + lastLineBox()->root()->bottomVisibleOverflow() |
| || y + result.paddingHeight() < ty + firstLineBox()->root()->topVisibleOverflow()) |
| 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()) { |
| if (y + result.paddingHeight() >= ty + curr->root()->topVisibleOverflow() |
| && y - result.paddingHeight() < ty + curr->root()->bottomVisibleOverflow()) { |
| bool inside = curr->nodeAtPoint(request, result, x, y, tx, ty); |
| if (inside) { |
| renderer->updateHitTestResult(result, IntPoint(x - tx, y - ty)); |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| void RenderLineBoxList::dirtyLinesFromChangedChild(RenderObject* container, RenderObject* child) |
| { |
| if (!container->parent() || (container->isRenderBlock() && (container->selfNeedsLayout() || !container->isBlockFlow()))) |
| return; |
| |
| // If we have no first line box, then just bail early. |
| if (!firstLineBox()) { |
| // For an empty inline, go ahead and propagate the check up to our parent, unless the parent |
| // is already dirty. |
| if (container->isInline() && !container->parent()->selfNeedsLayout()) |
| container->parent()->dirtyLinesFromChangedChild(container); |
| 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->isFloatingOrPositioned()) |
| continue; |
| |
| if (curr->isReplaced()) { |
| InlineBox* wrapper = toRenderBox(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()) { |
| InlineFlowBox* flowBox = toRenderInline(curr)->lastLineBox(); |
| if (flowBox) |
| box = flowBox->root(); |
| } |
| |
| if (box) |
| break; |
| } |
| if (!box) |
| box = firstLineBox()->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(); |
| if (child->isBR() || (curr && curr->isBR())) { |
| adjacentBox = box->nextRootBox(); |
| if (adjacentBox) |
| 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 |
| |
| } |
