void RenderFlowThread::updateLogicalWidth() { LayoutUnit logicalWidth = 0; for (RenderRegionList::iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) { RenderRegion* region = *iter; if (!region->isValid()) continue; ASSERT(!region->needsLayout()); logicalWidth = max(region->pageLogicalWidth(), logicalWidth); } setLogicalWidth(logicalWidth); // If the regions have non-uniform logical widths, then insert inset information for the RenderFlowThread. for (RenderRegionList::iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) { RenderRegion* region = *iter; if (!region->isValid()) continue; LayoutUnit regionLogicalWidth = region->pageLogicalWidth(); if (regionLogicalWidth != logicalWidth) { LayoutUnit logicalLeft = style()->direction() == LTR ? ZERO_LAYOUT_UNIT : logicalWidth - regionLogicalWidth; region->setRenderBoxRegionInfo(this, logicalLeft, regionLogicalWidth, false); } } }
void RenderFlowThread::updateRegionsFlowThreadPortionRect() { LayoutUnit logicalHeight = 0; for (RenderRegionList::iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) { RenderRegion* region = *iter; LayoutUnit regionLogicalWidth = region->pageLogicalWidth(); LayoutUnit regionLogicalHeight = region->logicalHeightOfAllFlowThreadContent(); LayoutRect regionRect(style()->direction() == LTR ? LayoutUnit() : logicalWidth() - regionLogicalWidth, logicalHeight, regionLogicalWidth, regionLogicalHeight); // When a flow thread has more than one auto logical height region, // we have to take into account the override logical content height value, // if computed for an auto logical height region, and use it to set the height // for the region rect. This way, the regions in the chain following the auto // logical height region, will be able to fragment the right part of their // associated flow thread content (and compute their overrideComputedLogicalHeight properly). if (view()->normalLayoutPhase()) { ASSERT(region->hasOverrideHeight() || !region->hasAutoLogicalHeight()); if (region->hasOverrideHeight()) regionLogicalHeight = region->overrideLogicalContentHeight(); regionRect.setHeight(regionLogicalHeight); } region->setFlowThreadPortionRect(isHorizontalWritingMode() ? regionRect : regionRect.transposedRect()); logicalHeight += regionLogicalHeight; } }
void RenderFlowThread::validateRegions() { if (m_regionsInvalidated) { m_regionsInvalidated = false; m_regionsHaveUniformLogicalWidth = true; m_regionsHaveUniformLogicalHeight = true; if (hasRegions()) { LayoutUnit previousRegionLogicalWidth = 0; LayoutUnit previousRegionLogicalHeight = 0; bool firstRegionVisited = false; for (RenderRegionList::iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) { RenderRegion* region = *iter; ASSERT(!region->needsLayout() || region->isRenderRegionSet()); region->deleteAllRenderBoxRegionInfo(); // In the normal layout phase we need to initialize the overrideLogicalContentHeight for auto-height regions. // See initializeRegionsOverrideLogicalContentHeight for the explanation. // Also, if we have auto-height regions we can't assume m_regionsHaveUniformLogicalHeight to be true in the first phase // because the auto-height regions don't have their height computed yet. if (view()->normalLayoutPhase() && region->hasAutoLogicalHeight()) { region->setOverrideLogicalContentHeight(region->maxPageLogicalHeight()); m_regionsHaveUniformLogicalHeight = false; } LayoutUnit regionLogicalWidth = region->pageLogicalWidth(); LayoutUnit regionLogicalHeight = region->pageLogicalHeight(); if (!firstRegionVisited) firstRegionVisited = true; else { if (m_regionsHaveUniformLogicalWidth && previousRegionLogicalWidth != regionLogicalWidth) m_regionsHaveUniformLogicalWidth = false; if (m_regionsHaveUniformLogicalHeight && previousRegionLogicalHeight != regionLogicalHeight) m_regionsHaveUniformLogicalHeight = false; } previousRegionLogicalWidth = regionLogicalWidth; } } } updateLogicalWidth(); // Called to get the maximum logical width for the region. updateRegionsFlowThreadPortionRect(); }
LayoutUnit RenderFlowThread::pageLogicalWidthForOffset(LayoutUnit offset) const { RenderRegion* region = regionAtBlockOffset(offset, true); return region ? region->pageLogicalWidth() : contentLogicalWidth(); }
void RenderFlowThread::layout() { StackStats::LayoutCheckPoint layoutCheckPoint; m_pageLogicalHeightChanged = m_regionsInvalidated && everHadLayout(); if (m_regionsInvalidated) { m_regionsInvalidated = false; m_regionsHaveUniformLogicalWidth = true; m_regionsHaveUniformLogicalHeight = true; m_regionRangeMap.clear(); m_breakBeforeToRegionMap.clear(); m_breakAfterToRegionMap.clear(); LayoutUnit previousRegionLogicalWidth = 0; LayoutUnit previousRegionLogicalHeight = 0; bool firstRegionVisited = false; if (hasRegions()) { for (RenderRegionList::iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) { RenderRegion* region = *iter; ASSERT(!region->needsLayout()); region->deleteAllRenderBoxRegionInfo(); // In the normal layout phase we need to initialize the overrideLogicalContentHeight for auto-height regions. // See initializeRegionsOverrideLogicalContentHeight for the explanation. // Also, if we have auto-height regions we can't assume m_regionsHaveUniformLogicalHeight to be true in the first phase // because the auto-height regions don't have their height computed yet. if (view()->normalLayoutPhase() && region->hasAutoLogicalHeight()) { region->setOverrideLogicalContentHeight(region->maxPageLogicalHeight()); m_regionsHaveUniformLogicalHeight = false; } LayoutUnit regionLogicalWidth = region->pageLogicalWidth(); LayoutUnit regionLogicalHeight = region->pageLogicalHeight(); if (!firstRegionVisited) firstRegionVisited = true; else { if (m_regionsHaveUniformLogicalWidth && previousRegionLogicalWidth != regionLogicalWidth) m_regionsHaveUniformLogicalWidth = false; if (m_regionsHaveUniformLogicalHeight && previousRegionLogicalHeight != regionLogicalHeight) m_regionsHaveUniformLogicalHeight = false; } previousRegionLogicalWidth = regionLogicalWidth; } updateLogicalWidth(); // Called to get the maximum logical width for the region. updateRegionsFlowThreadPortionRect(); } } CurrentRenderFlowThreadMaintainer currentFlowThreadSetter(this); RenderBlock::layout(); m_pageLogicalHeightChanged = false; if (lastRegion()) lastRegion()->expandToEncompassFlowThreadContentsIfNeeded(); if (shouldDispatchRegionLayoutUpdateEvent()) dispatchRegionLayoutUpdateEvent(); }
void RenderFlowThread::layout() { m_pageLogicalHeightChanged = m_regionsInvalidated && everHadLayout(); if (m_regionsInvalidated) { m_regionsInvalidated = false; m_hasValidRegions = false; m_regionsHaveUniformLogicalWidth = true; m_regionsHaveUniformLogicalHeight = true; m_regionRangeMap.clear(); LayoutUnit previousRegionLogicalWidth = 0; LayoutUnit previousRegionLogicalHeight = 0; if (hasRegions()) { for (RenderRegionList::iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) { RenderRegion* region = *iter; if (!region->isValid()) continue; ASSERT(!region->needsLayout()); region->deleteAllRenderBoxRegionInfo(); LayoutUnit regionLogicalWidth = region->pageLogicalWidth(); LayoutUnit regionLogicalHeight = region->pageLogicalHeight(); if (!m_hasValidRegions) m_hasValidRegions = true; else { if (m_regionsHaveUniformLogicalWidth && previousRegionLogicalWidth != regionLogicalWidth) m_regionsHaveUniformLogicalWidth = false; if (m_regionsHaveUniformLogicalHeight && previousRegionLogicalHeight != regionLogicalHeight) m_regionsHaveUniformLogicalHeight = false; } previousRegionLogicalWidth = regionLogicalWidth; } updateLogicalWidth(); // Called to get the maximum logical width for the region. LayoutUnit logicalHeight = 0; for (RenderRegionList::iterator iter = m_regionList.begin(); iter != m_regionList.end(); ++iter) { RenderRegion* region = *iter; if (!region->isValid()) continue; LayoutUnit regionLogicalWidth = region->pageLogicalWidth(); LayoutUnit regionLogicalHeight = region->logicalHeightOfAllFlowThreadContent(); LayoutRect regionRect(style()->direction() == LTR ? ZERO_LAYOUT_UNIT : logicalWidth() - regionLogicalWidth, logicalHeight, regionLogicalWidth, regionLogicalHeight); region->setFlowThreadPortionRect(isHorizontalWritingMode() ? regionRect : regionRect.transposedRect()); logicalHeight += regionLogicalHeight; } } } CurrentRenderFlowThreadMaintainer currentFlowThreadSetter(this); RenderBlock::layout(); m_pageLogicalHeightChanged = false; if (lastRegion()) lastRegion()->expandToEncompassFlowThreadContentsIfNeeded(); if (shouldDispatchRegionLayoutUpdateEvent()) dispatchRegionLayoutUpdateEvent(); }