void PendingSelection::commitAlgorithm(LayoutView& layoutView)
{
if (!hasPendingSelection())
return;
ASSERT(!layoutView.needsLayout());
m_hasPendingSelection = false;
const VisibleSelectionTemplate<Strategy> originalSelection = m_frameSelection->visibleSelection<Strategy>();
// Skip if pending VisibilePositions became invalid before we reach here.
if (!isSelectionInDocument(originalSelection, layoutView.document()))
return;
// Construct a new VisibleSolution, since visibleSelection() is not necessarily
// valid, and the following steps assume a valid selection.
// See <https://bugs.webkit.org/show_bug.cgi?id=69563> and
// <rdar://problem/10232866>.
const VisibleSelectionTemplate<Strategy> selection = calcVisibleSelectionAlgorithm<Strategy>(originalSelection);
if (!selection.isRange()) {
layoutView.clearSelection();
return;
}
// Use the rightmost candidate for the start of the selection, and the
// leftmost candidate for the end of the selection. Example: foo <a>bar</a>.
// Imagine that a line wrap occurs after 'foo', and that 'bar' is selected.
// If we pass [foo, 3] as the start of the selection, the selection painting
// code will think that content on the line containing 'foo' is selected
// and will fill the gap before 'bar'.
PositionTemplate<Strategy> startPos = selection.start();
PositionTemplate<Strategy> candidate = mostForwardCaretPosition(startPos);
if (isVisuallyEquivalentCandidate(candidate))
startPos = candidate;
PositionTemplate<Strategy> endPos = selection.end();
candidate = mostBackwardCaretPosition(endPos);
if (isVisuallyEquivalentCandidate(candidate))
endPos = candidate;
// We can get into a state where the selection endpoints map to the same
// |VisiblePosition| when a selection is deleted because we don't yet notify
// the |FrameSelection| of text removal.
if (startPos.isNull() || endPos.isNull() || selection.visibleStart().deepEquivalent() == selection.visibleEnd().deepEquivalent())
return;
LayoutObject* startLayoutObject = startPos.anchorNode()->layoutObject();
LayoutObject* endLayoutObject = endPos.anchorNode()->layoutObject();
if (!startLayoutObject || !endLayoutObject)
return;
ASSERT(layoutView == startLayoutObject->view() && layoutView == endLayoutObject->view());
layoutView.setSelection(startLayoutObject, startPos.computeEditingOffset(), endLayoutObject, endPos.computeEditingOffset());
}
PositionIteratorAlgorithm<Strategy>::PositionIteratorAlgorithm(
const PositionTemplate<Strategy>& pos)
: PositionIteratorAlgorithm(pos.anchorNode(), pos.computeEditingOffset()) {}
