IntRect RenderView::selectionBounds() const
{
typedef WillBeHeapHashMap<RawPtrWillBeMember<RenderObject>, OwnPtrWillBeMember<RenderSelectionInfo> > SelectionMap;
SelectionMap selectedObjects;
RenderObject* os = m_selectionStart;
RenderObject* stop = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
while (os && os != stop) {
if ((os->canBeSelectionLeaf() || os == m_selectionStart || os == m_selectionEnd) && os->selectionState() != SelectionNone) {
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
selectedObjects.set(os, adoptPtrWillBeNoop(new RenderSelectionInfo(os)));
RenderBlock* cb = os->containingBlock();
while (cb && !cb->isRenderView()) {
OwnPtrWillBeMember<RenderSelectionInfo>& blockInfo = selectedObjects.add(cb, nullptr).storedValue->value;
if (blockInfo)
break;
blockInfo = adoptPtrWillBeNoop(new RenderSelectionInfo(cb));
cb = cb->containingBlock();
}
}
os = os->nextInPreOrder();
}
// Now create a single bounding box rect that encloses the whole selection.
LayoutRect selRect;
SelectionMap::iterator end = selectedObjects.end();
for (SelectionMap::iterator i = selectedObjects.begin(); i != end; ++i)
selRect.unite(i->value->absoluteSelectionRect());
return pixelSnappedIntRect(selRect);
}
LayoutUnit RenderSVGRoot::computeReplacedLogicalHeight() const
{
// When we're embedded through SVGImage (border-image/background-image/<html:img>/...) we're forced to resize to a specific size.
if (!m_containerSize.isEmpty())
return m_containerSize.height();
if (style()->logicalHeight().isSpecified() || style()->logicalMaxHeight().isSpecified())
return RenderReplaced::computeReplacedLogicalHeight();
if (svgSVGElement().heightAttributeEstablishesViewport()) {
Length height = svgSVGElement().intrinsicHeight(SVGSVGElement::IgnoreCSSProperties);
if (height.isPercent()) {
RenderBlock* cb = containingBlock();
ASSERT(cb);
while (cb->isAnonymous() && !cb->isRenderView()) {
cb = cb->containingBlock();
cb->addPercentHeightDescendant(const_cast<RenderSVGRoot&>(*this));
}
} else
RenderBlock::removePercentHeightDescendant(const_cast<RenderSVGRoot&>(*this));
return resolveLengthAttributeForSVG(height, style()->effectiveZoom(), containingBlock()->availableLogicalHeight(IncludeMarginBorderPadding), &view());
}
// SVG embedded through object/embed/iframe.
if (isEmbeddedThroughFrameContainingSVGDocument())
return frame().ownerRenderer()->availableLogicalHeight(IncludeMarginBorderPadding);
// SVG embedded via SVGImage (background-image/border-image/etc) / Inline SVG.
return RenderReplaced::computeReplacedLogicalHeight();
}
void RenderView::invalidatePaintForSelection() const
{
HashSet<RenderBlock*> processedBlocks;
// For querying RenderLayer::compositingState()
// FIXME: this may be wrong. crbug.com/407416
DisableCompositingQueryAsserts disabler;
RenderObject* end = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
for (RenderObject* o = m_selectionStart; o && o != end; o = o->nextInPreOrder()) {
if (!o->canBeSelectionLeaf() && o != m_selectionStart && o != m_selectionEnd)
continue;
if (o->selectionState() == SelectionNone)
continue;
RenderSelectionInfo(o, true).invalidatePaint();
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
for (RenderBlock* block = o->containingBlock(); block && !block->isRenderView(); block = block->containingBlock()) {
if (!processedBlocks.add(block).isNewEntry)
break;
RenderSelectionInfo(block, true).invalidatePaint();
}
}
}
static inline RenderBlock* firstContainingBlockWithLogicalWidth(const RenderReplaced* replaced)
{
// We have to lookup the containing block, which has an explicit width, which must not be equal to our direct containing block.
// If the embedded document appears _after_ we performed the initial layout, our intrinsic size is 300x150. If our containing
// block doesn't provide an explicit width, it's set to the 300 default, coming from the initial layout run.
RenderBlock* containingBlock = replaced->containingBlock();
if (!containingBlock)
return 0;
for (; !containingBlock->isRenderView() && !containingBlock->isBody(); containingBlock = containingBlock->containingBlock()) {
if (containingBlock->style()->logicalWidth().isSpecified())
return containingBlock;
}
return 0;
}
void RenderBoxModelObject::setSelectionState(SelectionState state)
{
if (state == SelectionInside && selectionState() != SelectionNone)
return;
if ((state == SelectionStart && selectionState() == SelectionEnd)
|| (state == SelectionEnd && selectionState() == SelectionStart))
RenderObject::setSelectionState(SelectionBoth);
else
RenderObject::setSelectionState(state);
// FIXME: We should consider whether it is OK propagating to ancestor RenderInlines.
// This is a workaround for http://webkit.org/b/32123
// The containing block can be null in case of an orphaned tree.
RenderBlock* containingBlock = this->containingBlock();
if (containingBlock && !containingBlock->isRenderView())
containingBlock->setSelectionState(state);
}
static inline bool hasAutoHeightOrContainingBlockWithAutoHeight(const RenderReplaced* replaced)
{
Length logicalHeightLength = replaced->style()->logicalHeight();
if (logicalHeightLength.isAuto())
return true;
// For percentage heights: The percentage is calculated with respect to the height of the generated box's
// containing block. If the height of the containing block is not specified explicitly (i.e., it depends
// on content height), and this element is not absolutely positioned, the value computes to 'auto'.
if (!logicalHeightLength.isPercent() || replaced->isPositioned() || replaced->document()->inQuirksMode())
return false;
for (RenderBlock* cb = replaced->containingBlock(); !cb->isRenderView(); cb = cb->containingBlock()) {
if (cb->isTableCell() || (!cb->style()->logicalHeight().isAuto() || (!cb->style()->top().isAuto() && !cb->style()->bottom().isAuto())))
return false;
}
return true;
}
IntRect RenderView::selectionBounds(bool clipToVisibleContent) const
{
document()->updateStyleIfNeeded();
typedef HashMap<RenderObject*, RenderSelectionInfo*> SelectionMap;
SelectionMap selectedObjects;
RenderObject* os = m_selectionStart;
RenderObject* stop = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
while (os && os != stop) {
if ((os->canBeSelectionLeaf() || os == m_selectionStart || os == m_selectionEnd) && os->selectionState() != SelectionNone) {
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
selectedObjects.set(os, new RenderSelectionInfo(os, clipToVisibleContent));
RenderBlock* cb = os->containingBlock();
while (cb && !cb->isRenderView()) {
RenderSelectionInfo* blockInfo = selectedObjects.get(cb);
if (blockInfo)
break;
selectedObjects.set(cb, new RenderSelectionInfo(cb, clipToVisibleContent));
cb = cb->containingBlock();
}
}
os = os->nextInPreOrder();
}
// Now create a single bounding box rect that encloses the whole selection.
IntRect selRect;
SelectionMap::iterator end = selectedObjects.end();
for (SelectionMap::iterator i = selectedObjects.begin(); i != end; ++i) {
RenderSelectionInfo* info = i->second;
// RenderSelectionInfo::rect() is in the coordinates of the repaintContainer, so map to page coordinates.
IntRect currRect = info->rect();
if (RenderBoxModelObject* repaintContainer = info->repaintContainer()) {
FloatQuad absQuad = repaintContainer->localToAbsoluteQuad(FloatRect(currRect));
currRect = absQuad.enclosingBoundingBox();
}
selRect.unite(currRect);
delete info;
}
return selRect;
}
void RenderView::invalidatePaintForSelection() const
{
HashSet<RenderBlock*> processedBlocks;
RenderObject* end = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
for (RenderObject* o = m_selectionStart; o && o != end; o = o->nextInPreOrder()) {
if (!o->canBeSelectionLeaf() && o != m_selectionStart && o != m_selectionEnd)
continue;
if (o->selectionState() == SelectionNone)
continue;
o->setShouldInvalidateSelection();
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
for (RenderBlock* block = o->containingBlock(); block && !block->isRenderView(); block = block->containingBlock()) {
if (!processedBlocks.add(block).isNewEntry)
break;
block->setShouldInvalidateSelection();
}
}
}
IntRect RenderView::selectionBounds(bool clipToVisibleContent) const
{
typedef HashMap<RawPtr<RenderObject>, OwnPtr<RenderSelectionInfo> > SelectionMap;
SelectionMap selectedObjects;
RenderObject* os = m_selectionStart;
RenderObject* stop = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
while (os && os != stop) {
if ((os->canBeSelectionLeaf() || os == m_selectionStart || os == m_selectionEnd) && os->selectionState() != SelectionNone) {
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
selectedObjects.set(os, adoptPtr(new RenderSelectionInfo(os, clipToVisibleContent)));
RenderBlock* cb = os->containingBlock();
while (cb && !cb->isRenderView()) {
OwnPtr<RenderSelectionInfo>& blockInfo = selectedObjects.add(cb, nullptr).storedValue->value;
if (blockInfo)
break;
blockInfo = adoptPtr(new RenderSelectionInfo(cb, clipToVisibleContent));
cb = cb->containingBlock();
}
}
os = os->nextInPreOrder();
}
// Now create a single bounding box rect that encloses the whole selection.
LayoutRect selRect;
SelectionMap::iterator end = selectedObjects.end();
for (SelectionMap::iterator i = selectedObjects.begin(); i != end; ++i) {
RenderSelectionInfo* info = i->value.get();
// RenderSelectionInfo::rect() is in the coordinates of the paintInvalidationContainer, so map to page coordinates.
LayoutRect currRect = info->rect();
if (const RenderLayerModelObject* paintInvalidationContainer = info->paintInvalidationContainer()) {
FloatQuad absQuad = paintInvalidationContainer->localToAbsoluteQuad(FloatRect(currRect));
currRect = absQuad.enclosingBoundingBox();
}
selRect.unite(currRect);
}
return pixelSnappedIntRect(selRect);
}
void RenderView::repaintSelection() const
{
document().updateStyleIfNeeded();
HashSet<RenderBlock*> processedBlocks;
RenderObject* end = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
for (RenderObject* o = m_selectionStart; o && o != end; o = o->nextInPreOrder()) {
if (!o->canBeSelectionLeaf() && o != m_selectionStart && o != m_selectionEnd)
continue;
if (o->selectionState() == SelectionNone)
continue;
RenderSelectionInfo(o, true).repaint();
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
for (RenderBlock* block = o->containingBlock(); block && !block->isRenderView(); block = block->containingBlock()) {
if (!processedBlocks.add(block).isNewEntry)
break;
RenderSelectionInfo(block, true).repaint();
}
}
}
bool RenderBoxModelObject::hasAutoHeightOrContainingBlockWithAutoHeight() const
{
Length logicalHeightLength = style()->logicalHeight();
if (logicalHeightLength.isAuto())
return true;
// For percentage heights: The percentage is calculated with respect to the height of the generated box's
// containing block. If the height of the containing block is not specified explicitly (i.e., it depends
// on content height), and this element is not absolutely positioned, the value computes to 'auto'.
if (!logicalHeightLength.isPercent() || isOutOfFlowPositioned() || document().inQuirksMode())
return false;
// Anonymous block boxes are ignored when resolving percentage values that would refer to it:
// the closest non-anonymous ancestor box is used instead.
RenderBlock* cb = containingBlock();
while (cb->isAnonymous())
cb = cb->containingBlock();
// Matching RenderBox::percentageLogicalHeightIsResolvableFromBlock() by
// ignoring table cell's attribute value, where it says that table cells violate
// what the CSS spec says to do with heights. Basically we
// don't care if the cell specified a height or not.
if (cb->isTableCell())
return false;
// Match RenderBox::availableLogicalHeightUsing by special casing
// the render view. The available height is taken from the frame.
if (cb->isRenderView())
return false;
if (cb->isOutOfFlowPositioned() && !cb->style()->logicalTop().isAuto() && !cb->style()->logicalBottom().isAuto())
return false;
// If the height of the containing block computes to 'auto', then it hasn't been 'specified explicitly'.
return cb->hasAutoHeightOrContainingBlockWithAutoHeight();
}
IntRect RenderView::selectionBounds(bool clipToVisibleContent) const
{
document()->updateRendering();
typedef HashMap<RenderObject*, SelectionInfo*> SelectionMap;
SelectionMap selectedObjects;
RenderObject* os = m_selectionStart;
RenderObject* stop = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
while (os && os != stop) {
if ((os->canBeSelectionLeaf() || os == m_selectionStart || os == m_selectionEnd) && os->selectionState() != SelectionNone) {
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
selectedObjects.set(os, new SelectionInfo(os, clipToVisibleContent));
RenderBlock* cb = os->containingBlock();
while (cb && !cb->isRenderView()) {
SelectionInfo* blockInfo = selectedObjects.get(cb);
if (blockInfo)
break;
selectedObjects.set(cb, new SelectionInfo(cb, clipToVisibleContent));
cb = cb->containingBlock();
}
}
os = os->nextInPreOrder();
}
// Now create a single bounding box rect that encloses the whole selection.
IntRect selRect;
SelectionMap::iterator end = selectedObjects.end();
for (SelectionMap::iterator i = selectedObjects.begin(); i != end; ++i) {
SelectionInfo* info = i->second;
selRect.unite(info->rect());
delete info;
}
return selRect;
}
void RenderView::setSelection(RenderObject* start, int startPos, RenderObject* end, int endPos, SelectionRepaintMode blockRepaintMode)
{
// Make sure both our start and end objects are defined.
// Check www.msnbc.com and try clicking around to find the case where this happened.
if ((start && !end) || (end && !start))
return;
// Just return if the selection hasn't changed.
if (m_selectionStart == start && m_selectionStartPos == startPos &&
m_selectionEnd == end && m_selectionEndPos == endPos)
return;
// Record the old selected objects. These will be used later
// when we compare against the new selected objects.
int oldStartPos = m_selectionStartPos;
int oldEndPos = m_selectionEndPos;
// Objects each have a single selection rect to examine.
typedef HashMap<RenderObject*, OwnPtr<RenderSelectionInfo> > SelectedObjectMap;
SelectedObjectMap oldSelectedObjects;
SelectedObjectMap newSelectedObjects;
// Blocks contain selected objects and fill gaps between them, either on the left, right, or in between lines and blocks.
// In order to get the repaint rect right, we have to examine left, middle, and right rects individually, since otherwise
// the union of those rects might remain the same even when changes have occurred.
typedef HashMap<RenderBlock*, OwnPtr<RenderBlockSelectionInfo> > SelectedBlockMap;
SelectedBlockMap oldSelectedBlocks;
SelectedBlockMap newSelectedBlocks;
RenderObject* os = m_selectionStart;
RenderObject* stop = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
while (os && os != stop) {
if ((os->canBeSelectionLeaf() || os == m_selectionStart || os == m_selectionEnd) && os->selectionState() != SelectionNone) {
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
oldSelectedObjects.set(os, adoptPtr(new RenderSelectionInfo(os, true)));
if (blockRepaintMode == RepaintNewXOROld) {
RenderBlock* cb = os->containingBlock();
while (cb && !cb->isRenderView()) {
OwnPtr<RenderBlockSelectionInfo>& blockInfo = oldSelectedBlocks.add(cb, nullptr).iterator->second;
if (blockInfo)
break;
blockInfo = adoptPtr(new RenderBlockSelectionInfo(cb));
cb = cb->containingBlock();
}
}
}
os = os->nextInPreOrder();
}
// Now clear the selection.
SelectedObjectMap::iterator oldObjectsEnd = oldSelectedObjects.end();
for (SelectedObjectMap::iterator i = oldSelectedObjects.begin(); i != oldObjectsEnd; ++i)
i->first->setSelectionStateIfNeeded(SelectionNone);
// set selection start and end
m_selectionStart = start;
m_selectionStartPos = startPos;
m_selectionEnd = end;
m_selectionEndPos = endPos;
// Update the selection status of all objects between m_selectionStart and m_selectionEnd
if (start && start == end)
start->setSelectionStateIfNeeded(SelectionBoth);
else {
if (start)
start->setSelectionStateIfNeeded(SelectionStart);
if (end)
end->setSelectionStateIfNeeded(SelectionEnd);
}
RenderObject* o = start;
stop = rendererAfterPosition(end, endPos);
while (o && o != stop) {
if (o != start && o != end && o->canBeSelectionLeaf())
o->setSelectionStateIfNeeded(SelectionInside);
o = o->nextInPreOrder();
}
if (blockRepaintMode != RepaintNothing)
m_layer->clearBlockSelectionGapsBounds();
// Now that the selection state has been updated for the new objects, walk them again and
// put them in the new objects list.
o = start;
while (o && o != stop) {
if ((o->canBeSelectionLeaf() || o == start || o == end) && o->selectionState() != SelectionNone) {
newSelectedObjects.set(o, adoptPtr(new RenderSelectionInfo(o, true)));
RenderBlock* cb = o->containingBlock();
while (cb && !cb->isRenderView()) {
OwnPtr<RenderBlockSelectionInfo>& blockInfo = newSelectedBlocks.add(cb, nullptr).iterator->second;
if (blockInfo)
break;
blockInfo = adoptPtr(new RenderBlockSelectionInfo(cb));
cb = cb->containingBlock();
}
}
o = o->nextInPreOrder();
}
if (!m_frameView || blockRepaintMode == RepaintNothing)
return;
m_frameView->beginDeferredRepaints();
// Have any of the old selected objects changed compared to the new selection?
for (SelectedObjectMap::iterator i = oldSelectedObjects.begin(); i != oldObjectsEnd; ++i) {
RenderObject* obj = i->first;
RenderSelectionInfo* newInfo = newSelectedObjects.get(obj);
RenderSelectionInfo* oldInfo = i->second.get();
if (!newInfo || oldInfo->rect() != newInfo->rect() || oldInfo->state() != newInfo->state() ||
(m_selectionStart == obj && oldStartPos != m_selectionStartPos) ||
(m_selectionEnd == obj && oldEndPos != m_selectionEndPos)) {
oldInfo->repaint();
if (newInfo) {
newInfo->repaint();
newSelectedObjects.remove(obj);
}
}
}
// Any new objects that remain were not found in the old objects dict, and so they need to be updated.
SelectedObjectMap::iterator newObjectsEnd = newSelectedObjects.end();
for (SelectedObjectMap::iterator i = newSelectedObjects.begin(); i != newObjectsEnd; ++i)
i->second->repaint();
// Have any of the old blocks changed?
SelectedBlockMap::iterator oldBlocksEnd = oldSelectedBlocks.end();
for (SelectedBlockMap::iterator i = oldSelectedBlocks.begin(); i != oldBlocksEnd; ++i) {
RenderBlock* block = i->first;
RenderBlockSelectionInfo* newInfo = newSelectedBlocks.get(block);
RenderBlockSelectionInfo* oldInfo = i->second.get();
if (!newInfo || oldInfo->rects() != newInfo->rects() || oldInfo->state() != newInfo->state()) {
oldInfo->repaint();
if (newInfo) {
newInfo->repaint();
newSelectedBlocks.remove(block);
}
}
}
// Any new blocks that remain were not found in the old blocks dict, and so they need to be updated.
SelectedBlockMap::iterator newBlocksEnd = newSelectedBlocks.end();
for (SelectedBlockMap::iterator i = newSelectedBlocks.begin(); i != newBlocksEnd; ++i)
i->second->repaint();
m_frameView->endDeferredRepaints();
}
void RenderView::setSelection(RenderObject* start, int startPos, RenderObject* end, int endPos, SelectionPaintInvalidationMode blockPaintInvalidationMode)
{
// This code makes no assumptions as to if the rendering tree is up to date or not
// and will not try to update it. Currently clearSelection calls this
// (intentionally) without updating the rendering tree as it doesn't care.
// Other callers may want to force recalc style before calling this.
// Make sure both our start and end objects are defined.
// Check www.msnbc.com and try clicking around to find the case where this happened.
if ((start && !end) || (end && !start))
return;
// Just return if the selection hasn't changed.
if (m_selectionStart == start && m_selectionStartPos == startPos &&
m_selectionEnd == end && m_selectionEndPos == endPos)
return;
// Record the old selected objects. These will be used later
// when we compare against the new selected objects.
int oldStartPos = m_selectionStartPos;
int oldEndPos = m_selectionEndPos;
// Objects each have a single selection rect to examine.
typedef WillBeHeapHashMap<RawPtrWillBeMember<RenderObject>, SelectionState > SelectedObjectMap;
SelectedObjectMap oldSelectedObjects;
// FIXME: |newSelectedObjects| doesn't really need to store the SelectionState, it's just more convenient
// to have it use the same data structure as |oldSelectedObjects|.
SelectedObjectMap newSelectedObjects;
// Blocks contain selected objects and fill gaps between them, either on the left, right, or in between lines and blocks.
// In order to get the paint invalidation rect right, we have to examine left, middle, and right rects individually, since otherwise
// the union of those rects might remain the same even when changes have occurred.
typedef WillBeHeapHashMap<RawPtrWillBeMember<RenderBlock>, SelectionState > SelectedBlockMap;
SelectedBlockMap oldSelectedBlocks;
// FIXME: |newSelectedBlocks| doesn't really need to store the SelectionState, it's just more convenient
// to have it use the same data structure as |oldSelectedBlocks|.
SelectedBlockMap newSelectedBlocks;
RenderObject* os = m_selectionStart;
RenderObject* stop = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
bool exploringBackwards = false;
bool continueExploring = os && (os != stop);
while (continueExploring) {
if ((os->canBeSelectionLeaf() || os == m_selectionStart || os == m_selectionEnd) && os->selectionState() != SelectionNone) {
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
oldSelectedObjects.set(os, os->selectionState());
if (blockPaintInvalidationMode == PaintInvalidationNewXOROld) {
RenderBlock* cb = os->containingBlock();
while (cb && !cb->isRenderView()) {
SelectedBlockMap::AddResult result = oldSelectedBlocks.add(cb, cb->selectionState());
if (!result.isNewEntry)
break;
cb = cb->containingBlock();
}
}
}
os = getNextOrPrevRenderObjectBasedOnDirection(os, stop, continueExploring, exploringBackwards);
}
// Now clear the selection.
SelectedObjectMap::iterator oldObjectsEnd = oldSelectedObjects.end();
for (SelectedObjectMap::iterator i = oldSelectedObjects.begin(); i != oldObjectsEnd; ++i)
i->key->setSelectionStateIfNeeded(SelectionNone);
// set selection start and end
m_selectionStart = start;
m_selectionStartPos = startPos;
m_selectionEnd = end;
m_selectionEndPos = endPos;
// Update the selection status of all objects between m_selectionStart and m_selectionEnd
if (start && start == end)
start->setSelectionStateIfNeeded(SelectionBoth);
else {
if (start)
start->setSelectionStateIfNeeded(SelectionStart);
if (end)
end->setSelectionStateIfNeeded(SelectionEnd);
}
RenderObject* o = start;
stop = rendererAfterPosition(end, endPos);
while (o && o != stop) {
if (o != start && o != end && o->canBeSelectionLeaf())
o->setSelectionStateIfNeeded(SelectionInside);
o = o->nextInPreOrder();
}
layer()->clearBlockSelectionGapsBounds();
// Now that the selection state has been updated for the new objects, walk them again and
// put them in the new objects list.
o = start;
exploringBackwards = false;
continueExploring = o && (o != stop);
while (continueExploring) {
if ((o->canBeSelectionLeaf() || o == start || o == end) && o->selectionState() != SelectionNone) {
newSelectedObjects.set(o, o->selectionState());
RenderBlock* cb = o->containingBlock();
while (cb && !cb->isRenderView()) {
SelectedBlockMap::AddResult result = newSelectedBlocks.add(cb, cb->selectionState());
if (!result.isNewEntry)
break;
cb = cb->containingBlock();
}
}
o = getNextOrPrevRenderObjectBasedOnDirection(o, stop, continueExploring, exploringBackwards);
}
if (!m_frameView)
return;
// Have any of the old selected objects changed compared to the new selection?
for (SelectedObjectMap::iterator i = oldSelectedObjects.begin(); i != oldObjectsEnd; ++i) {
RenderObject* obj = i->key;
SelectionState newSelectionState = obj->selectionState();
SelectionState oldSelectionState = i->value;
if (newSelectionState != oldSelectionState
|| (m_selectionStart == obj && oldStartPos != m_selectionStartPos)
|| (m_selectionEnd == obj && oldEndPos != m_selectionEndPos)) {
obj->setShouldInvalidateSelection();
newSelectedObjects.remove(obj);
}
}
// Any new objects that remain were not found in the old objects dict, and so they need to be updated.
SelectedObjectMap::iterator newObjectsEnd = newSelectedObjects.end();
for (SelectedObjectMap::iterator i = newSelectedObjects.begin(); i != newObjectsEnd; ++i)
i->key->setShouldInvalidateSelection();
// Have any of the old blocks changed?
SelectedBlockMap::iterator oldBlocksEnd = oldSelectedBlocks.end();
for (SelectedBlockMap::iterator i = oldSelectedBlocks.begin(); i != oldBlocksEnd; ++i) {
RenderBlock* block = i->key;
SelectionState newSelectionState = block->selectionState();
SelectionState oldSelectionState = i->value;
if (newSelectionState != oldSelectionState) {
block->setShouldInvalidateSelection();
newSelectedBlocks.remove(block);
}
}
// Any new blocks that remain were not found in the old blocks dict, and so they need to be updated.
SelectedBlockMap::iterator newBlocksEnd = newSelectedBlocks.end();
for (SelectedBlockMap::iterator i = newSelectedBlocks.begin(); i != newBlocksEnd; ++i)
i->key->setShouldInvalidateSelection();
}
void RenderView::setSelection(RenderObject *s, int sp, RenderObject *e, int ep)
{
// Make sure both our start and end objects are defined.
// Check www.msnbc.com and try clicking around to find the case where this happened.
if ((s && !e) || (e && !s))
return;
// Just return if the selection hasn't changed.
if (m_selectionStart == s && m_selectionStartPos == sp &&
m_selectionEnd == e && m_selectionEndPos == ep)
return;
// Record the old selected objects. These will be used later
// when we compare against the new selected objects.
int oldStartPos = m_selectionStartPos;
int oldEndPos = m_selectionEndPos;
// Objects each have a single selection rect to examine.
typedef HashMap<RenderObject*, SelectionInfo*> SelectedObjectMap;
SelectedObjectMap oldSelectedObjects;
SelectedObjectMap newSelectedObjects;
// Blocks contain selected objects and fill gaps between them, either on the left, right, or in between lines and blocks.
// In order to get the repaint rect right, we have to examine left, middle, and right rects individually, since otherwise
// the union of those rects might remain the same even when changes have occurred.
typedef HashMap<RenderBlock*, BlockSelectionInfo*> SelectedBlockMap;
SelectedBlockMap oldSelectedBlocks;
SelectedBlockMap newSelectedBlocks;
RenderObject* os = m_selectionStart;
RenderObject* stop = rendererAfterPosition(m_selectionEnd, m_selectionEndPos);
while (os && os != stop) {
if ((os->canBeSelectionLeaf() || os == m_selectionStart || os == m_selectionEnd) && os->selectionState() != SelectionNone) {
// Blocks are responsible for painting line gaps and margin gaps. They must be examined as well.
oldSelectedObjects.set(os, new SelectionInfo(os));
RenderBlock* cb = os->containingBlock();
while (cb && !cb->isRenderView()) {
BlockSelectionInfo* blockInfo = oldSelectedBlocks.get(cb);
if (blockInfo)
break;
oldSelectedBlocks.set(cb, new BlockSelectionInfo(cb));
cb = cb->containingBlock();
}
}
os = os->nextInPreOrder();
}
// Now clear the selection.
SelectedObjectMap::iterator oldObjectsEnd = oldSelectedObjects.end();
for (SelectedObjectMap::iterator i = oldSelectedObjects.begin(); i != oldObjectsEnd; ++i)
i->first->setSelectionState(SelectionNone);
// set selection start and end
m_selectionStart = s;
m_selectionStartPos = sp;
m_selectionEnd = e;
m_selectionEndPos = ep;
// Update the selection status of all objects between m_selectionStart and m_selectionEnd
if (s && s == e)
s->setSelectionState(SelectionBoth);
else {
if (s)
s->setSelectionState(SelectionStart);
if (e)
e->setSelectionState(SelectionEnd);
}
RenderObject* o = s;
stop = rendererAfterPosition(e, ep);
while (o && o != stop) {
if (o != s && o != e && o->canBeSelectionLeaf())
o->setSelectionState(SelectionInside);
o = o->nextInPreOrder();
}
// Now that the selection state has been updated for the new objects, walk them again and
// put them in the new objects list.
o = s;
while (o && o != stop) {
if ((o->canBeSelectionLeaf() || o == s || o == e) && o->selectionState() != SelectionNone) {
newSelectedObjects.set(o, new SelectionInfo(o));
RenderBlock* cb = o->containingBlock();
while (cb && !cb->isRenderView()) {
BlockSelectionInfo* blockInfo = newSelectedBlocks.get(cb);
if (blockInfo)
break;
newSelectedBlocks.set(cb, new BlockSelectionInfo(cb));
cb = cb->containingBlock();
}
}
o = o->nextInPreOrder();
}
if (!m_frameView)
return;
// Have any of the old selected objects changed compared to the new selection?
for (SelectedObjectMap::iterator i = oldSelectedObjects.begin(); i != oldObjectsEnd; ++i) {
RenderObject* obj = i->first;
SelectionInfo* newInfo = newSelectedObjects.get(obj);
SelectionInfo* oldInfo = i->second;
if (!newInfo || oldInfo->rect() != newInfo->rect() || oldInfo->state() != newInfo->state() ||
(m_selectionStart == obj && oldStartPos != m_selectionStartPos) ||
(m_selectionEnd == obj && oldEndPos != m_selectionEndPos)) {
m_frameView->updateContents(oldInfo->rect());
if (newInfo) {
m_frameView->updateContents(newInfo->rect());
newSelectedObjects.remove(obj);
delete newInfo;
}
}
delete oldInfo;
}
// Any new objects that remain were not found in the old objects dict, and so they need to be updated.
SelectedObjectMap::iterator newObjectsEnd = newSelectedObjects.end();
for (SelectedObjectMap::iterator i = newSelectedObjects.begin(); i != newObjectsEnd; ++i) {
SelectionInfo* newInfo = i->second;
m_frameView->updateContents(newInfo->rect());
delete newInfo;
}
// Have any of the old blocks changed?
SelectedBlockMap::iterator oldBlocksEnd = oldSelectedBlocks.end();
for (SelectedBlockMap::iterator i = oldSelectedBlocks.begin(); i != oldBlocksEnd; ++i) {
RenderBlock* block = i->first;
BlockSelectionInfo* newInfo = newSelectedBlocks.get(block);
BlockSelectionInfo* oldInfo = i->second;
if (!newInfo || oldInfo->rects() != newInfo->rects() || oldInfo->state() != newInfo->state()) {
m_frameView->updateContents(oldInfo->rects());
if (newInfo) {
m_frameView->updateContents(newInfo->rects());
newSelectedBlocks.remove(block);
delete newInfo;
}
}
delete oldInfo;
}
// Any new blocks that remain were not found in the old blocks dict, and so they need to be updated.
SelectedBlockMap::iterator newBlocksEnd = newSelectedBlocks.end();
for (SelectedBlockMap::iterator i = newSelectedBlocks.begin(); i != newBlocksEnd; ++i) {
BlockSelectionInfo* newInfo = i->second;
m_frameView->updateContents(newInfo->rects());
delete newInfo;
}
}