LayoutRect LayoutMultiColumnSet::flowThreadPortionRect() const
{
LayoutRect portionRect(LayoutUnit(), logicalTopInFlowThread(), pageLogicalWidth(), logicalHeightInFlowThread());
if (!isHorizontalWritingMode())
return portionRect.transposedRect();
return portionRect;
}
LayoutSize MultiColumnFragmentainerGroup::flowThreadTranslationAtOffset(LayoutUnit offsetInFlowThread) const
{
LayoutMultiColumnFlowThread* flowThread = m_columnSet.multiColumnFlowThread();
unsigned columnIndex = columnIndexAtOffset(offsetInFlowThread);
LayoutRect portionRect(flowThreadPortionRectAt(columnIndex));
flowThread->flipForWritingMode(portionRect);
LayoutRect columnRect(columnRectAt(columnIndex));
m_columnSet.flipForWritingMode(columnRect);
LayoutSize translationRelativeToGroup = columnRect.location() - portionRect.location();
LayoutSize enclosingTranslation;
if (LayoutMultiColumnFlowThread* enclosingFlowThread = flowThread->enclosingFlowThread()) {
// Translation that would map points in the coordinate space of the outermost flow thread to
// visual points in the first column in the first fragmentainer group (row) in our multicol
// container.
LayoutSize enclosingTranslationOrigin = enclosingFlowThread->flowThreadTranslationAtOffset(flowThread->blockOffsetInEnclosingFragmentationContext());
// Translation that would map points in the coordinate space of the outermost flow thread to
// visual points in the first column in this fragmentainer group.
enclosingTranslation = enclosingFlowThread->flowThreadTranslationAtOffset(blockOffsetInEnclosingFragmentationContext());
// What we ultimately return from this method is a translation that maps points in the
// coordinate space of our flow thread to a visual point in a certain column in this
// fragmentainer group. We had to go all the way up to the outermost flow thread, since this
// fragmentainer group may be in a different outer column than the first outer column that
// this multicol container lives in. It's the visual distance between the first
// fragmentainer group and this fragmentainer group that we need to add to the translation.
enclosingTranslation -= enclosingTranslationOrigin;
}
return enclosingTranslation + translationRelativeToGroup + offsetFromColumnSet() + m_columnSet.topLeftLocationOffset() - flowThread->topLeftLocationOffset();
}
LayoutSize RenderMultiColumnFlowThread::physicalTranslationOffsetFromFlowToRegion(const RenderRegion* renderRegion, const LayoutUnit logicalOffset) const
{
// Now that we know which multicolumn set we hit, we need to get the appropriate translation offset for the column.
const RenderMultiColumnSet* columnSet = toRenderMultiColumnSet(renderRegion);
LayoutPoint translationOffset = columnSet->columnTranslationForOffset(logicalOffset);
// Now we know how we want the rect to be translated into the region. At this point we're converting
// back to physical coordinates.
if (style().isFlippedBlocksWritingMode()) {
LayoutRect portionRect(columnSet->flowThreadPortionRect());
LayoutRect columnRect = columnSet->columnRectAt(0);
LayoutUnit physicalDeltaFromPortionBottom = logicalHeight() - columnSet->logicalBottomInFlowThread();
if (isHorizontalWritingMode())
columnRect.setHeight(portionRect.height());
else
columnRect.setWidth(portionRect.width());
columnSet->flipForWritingMode(columnRect);
if (isHorizontalWritingMode())
translationOffset.move(0, columnRect.y() - portionRect.y() - physicalDeltaFromPortionBottom);
else
translationOffset.move(columnRect.x() - portionRect.x() - physicalDeltaFromPortionBottom, 0);
}
return LayoutSize(translationOffset.x(), translationOffset.y());
}
LayoutSize RenderMultiColumnSet::flowThreadTranslationAtOffset(LayoutUnit blockOffset) const
{
unsigned columnIndex = columnIndexAtOffset(blockOffset);
LayoutRect portionRect(flowThreadPortionRectAt(columnIndex));
flipForWritingMode(portionRect);
LayoutRect columnRect(columnRectAt(columnIndex));
flipForWritingMode(columnRect);
return contentBoxRect().location() + columnRect.location() - portionRect.location();
}
LayoutSize MultiColumnFragmentainerGroup::flowThreadTranslationAtOffset(LayoutUnit offsetInFlowThread) const
{
LayoutFlowThread* flowThread = m_columnSet.flowThread();
unsigned columnIndex = columnIndexAtOffset(offsetInFlowThread);
LayoutRect portionRect(flowThreadPortionRectAt(columnIndex));
flowThread->flipForWritingMode(portionRect);
LayoutRect columnRect(columnRectAt(columnIndex));
m_columnSet.flipForWritingMode(columnRect);
LayoutSize translationRelativeToGroup = columnRect.location() - portionRect.location();
return translationRelativeToGroup + offsetFromColumnSet() + m_columnSet.topLeftLocationOffset() - flowThread->topLeftLocationOffset();
}
void CTestContainer::Draw(const TRect& /*aRect*/) const
{
switch(iBackgroundType)
{
case EBackgroundBlackRedGreenYellowStripes:
{
const TRect rect=Rect();
CWindowGc& gc=SystemGc();
gc.SetPenStyle(CGraphicsContext::ENullPen);
gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
gc.SetBrushColor(iColor);
TInt yOffset = rect.Height() / 4;
TRect portionRect(rect.iTl.iX, rect.iTl.iY, rect.iBr.iX, rect.iTl.iY + yOffset);
gc.DrawRect(portionRect);
gc.SetBrushColor(KRgbRed);
portionRect.iTl.iY = portionRect.iBr.iY;
portionRect.iBr.iY += yOffset;
gc.DrawRect(portionRect);
gc.SetBrushColor(KRgbGreen);
portionRect.iTl.iY = portionRect.iBr.iY;
portionRect.iBr.iY += yOffset;
gc.DrawRect(portionRect);
gc.SetBrushColor(KRgbYellow);
portionRect.iTl.iY = portionRect.iBr.iY;
portionRect.iBr.iY = rect.iBr.iY;
gc.DrawRect(portionRect);
gc.SetBrushColor(KRgbWhite);
}
break;
case EBackgroundYellow:
{
const TRect rect=Rect();
CWindowGc& gc=SystemGc();
gc.SetPenStyle(CGraphicsContext::ENullPen);
gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
gc.SetBrushColor(KRgbYellow);
gc.DrawRect(rect);
}
break;
case EBackgroundBlue:
{
const TRect rect=Rect();
CWindowGc& gc=SystemGc();
gc.SetPenStyle(CGraphicsContext::ENullPen);
gc.SetBrushStyle(CGraphicsContext::ESolidBrush);
gc.SetBrushColor(KRgbBlue);
gc.DrawRect(rect);
}
break;
default:
break;
}
}
unsigned RenderMultiColumnSet::columnIndexAtOffset(LayoutUnit offset) const
{
LayoutRect portionRect(flowThreadPortionRect());
LayoutUnit flowThreadLogicalTop = isHorizontalWritingMode() ? portionRect.y() : portionRect.x();
LayoutUnit flowThreadLogicalBottom = isHorizontalWritingMode() ? portionRect.maxY() : portionRect.maxX();
// Handle the offset being out of range.
if (offset < flowThreadLogicalTop)
return 0;
if (offset >= flowThreadLogicalBottom)
return columnCount() - 1;
// Just divide by the column height to determine the correct column.
return static_cast<float>(offset - flowThreadLogicalTop) / computedColumnHeight();
}
unsigned RenderMultiColumnSet::columnIndexAtOffset(LayoutUnit offset, ColumnIndexCalculationMode mode) const
{
LayoutRect portionRect(flowThreadPortionRect());
// Handle the offset being out of range.
LayoutUnit flowThreadLogicalTop = isHorizontalWritingMode() ? portionRect.y() : portionRect.x();
if (offset < flowThreadLogicalTop)
return 0;
// If we're laying out right now, we cannot constrain against some logical bottom, since it
// isn't known yet. Otherwise, just return the last column if we're past the logical bottom.
if (mode == ClampToExistingColumns) {
LayoutUnit flowThreadLogicalBottom = isHorizontalWritingMode() ? portionRect.maxY() : portionRect.maxX();
if (offset >= flowThreadLogicalBottom)
return columnCount() - 1;
}
// Just divide by the column height to determine the correct column.
return (offset - flowThreadLogicalTop).toFloat() / computedColumnHeight().toFloat();
}
LayoutSize MultiColumnFragmentainerGroup::flowThreadTranslationAtOffset(
LayoutUnit offsetInFlowThread,
LayoutBox::PageBoundaryRule rule,
CoordinateSpaceConversion mode) const {
LayoutMultiColumnFlowThread* flowThread = m_columnSet.multiColumnFlowThread();
// A column out of range doesn't have a flow thread portion, so we need to
// clamp to make sure that we stay within the actual columns. This means that
// content in the overflow area will be mapped to the last actual column,
// instead of being mapped to an imaginary column further ahead.
unsigned columnIndex = offsetInFlowThread >= logicalBottomInFlowThread()
? actualColumnCount() - 1
: columnIndexAtOffset(offsetInFlowThread, rule);
LayoutRect portionRect(flowThreadPortionRectAt(columnIndex));
flowThread->flipForWritingMode(portionRect);
portionRect.moveBy(flowThread->topLeftLocation());
LayoutRect columnRect(columnRectAt(columnIndex));
columnRect.move(offsetFromColumnSet());
m_columnSet.flipForWritingMode(columnRect);
columnRect.moveBy(m_columnSet.topLeftLocation());
LayoutSize translationRelativeToFlowThread =
columnRect.location() - portionRect.location();
if (mode == CoordinateSpaceConversion::Containing)
return translationRelativeToFlowThread;
LayoutSize enclosingTranslation;
if (LayoutMultiColumnFlowThread* enclosingFlowThread =
flowThread->enclosingFlowThread()) {
const MultiColumnFragmentainerGroup& firstRow =
flowThread->firstMultiColumnSet()->firstFragmentainerGroup();
// Translation that would map points in the coordinate space of the
// outermost flow thread to visual points in the first column in the first
// fragmentainer group (row) in our multicol container.
LayoutSize enclosingTranslationOrigin =
enclosingFlowThread->flowThreadTranslationAtOffset(
firstRow.blockOffsetInEnclosingFragmentationContext(),
LayoutBox::AssociateWithLatterPage, mode);
// Translation that would map points in the coordinate space of the
// outermost flow thread to visual points in the first column in this
// fragmentainer group.
enclosingTranslation = enclosingFlowThread->flowThreadTranslationAtOffset(
blockOffsetInEnclosingFragmentationContext(),
LayoutBox::AssociateWithLatterPage, mode);
// What we ultimately return from this method is a translation that maps
// points in the coordinate space of our flow thread to a visual point in a
// certain column in this fragmentainer group. We had to go all the way up
// to the outermost flow thread, since this fragmentainer group may be in a
// different outer column than the first outer column that this multicol
// container lives in. It's the visual distance between the first
// fragmentainer group and this fragmentainer group that we need to add to
// the translation.
enclosingTranslation -= enclosingTranslationOrigin;
}
return enclosingTranslation + translationRelativeToFlowThread;
}