VisibleSelection visibleSelectionForClosestActualWordStart(const VisibleSelection& selection)
{
// VisibleSelection validation has a special case when the caret is at the end of a paragraph where
// it selects the paragraph marker. As well, if the position is at the end of a word, it will select
// only the space between words. We want to select an actual word so we move the selection to
// the start of the leftmost word if the character after the selection point is whitespace.
if (selection.selectionType() != VisibleSelection::RangeSelection) {
int leftDistance = 0;
int rightDistance = 0;
VisibleSelection leftSelection(previousWordPosition(selection.start()));
bool leftSelectionIsOnWord = !isWhitespace(leftSelection.visibleStart().characterAfter()) && leftSelection.start().containerNode() == selection.start().containerNode();
if (leftSelectionIsOnWord) {
VisibleSelection rangeSelection(endOfWord(leftSelection.start()), selection.visibleStart());
leftDistance = TextIterator::rangeLength(rangeSelection.toNormalizedRange().get());
}
VisibleSelection rightSelection = previousWordPosition(nextWordPosition(selection.start()));
bool rightSelectionIsOnWord = !isWhitespace(rightSelection.visibleStart().characterAfter()) && rightSelection.start().containerNode() == selection.start().containerNode();
if (rightSelectionIsOnWord) {
VisibleSelection rangeSelection = VisibleSelection(rightSelection.visibleStart(), selection.visibleStart());
rightDistance = TextIterator::rangeLength(rangeSelection.toNormalizedRange().get());
}
// Make sure we found an actual word. If not, return the original selection.
if (!leftSelectionIsOnWord && !rightSelectionIsOnWord)
return selection;
if (!rightSelectionIsOnWord || (leftSelectionIsOnWord && leftDistance <= rightDistance)) {
// Left is closer or right is invalid.
return leftSelection;
}
// Right is closer or equal, or left was invalid.
return rightSelection;
}
// No adjustment required.
return selection;
}
