bool Editor::insertLineBreak()
{
if (!canEdit())
return false;
VisiblePosition caret = m_frame.selection().selection().visibleStart();
bool alignToEdge = isEndOfEditableOrNonEditableContent(caret);
ASSERT(m_frame.document());
TypingCommand::insertLineBreak(*m_frame.document(), 0);
revealSelectionAfterEditingOperation(alignToEdge ? ScrollAlignment::alignToEdgeIfNeeded : ScrollAlignment::alignCenterIfNeeded);
return true;
}
void VisibleSelection::setStartAndEndFromBaseAndExtentRespectingGranularity(TextGranularity granularity)
{
if (m_baseIsFirst) {
m_start = m_base;
m_end = m_extent;
} else {
m_start = m_extent;
m_end = m_base;
}
switch (granularity) {
case CharacterGranularity:
// Don't do any expansion.
break;
case WordGranularity: {
// General case: Select the word the caret is positioned inside of, or at the start of (RightWordIfOnBoundary).
// Edge case: If the caret is after the last word in a soft-wrapped line or the last word in
// the document, select that last word (LeftWordIfOnBoundary).
// Edge case: If the caret is after the last word in a paragraph, select from the the end of the
// last word to the line break (also RightWordIfOnBoundary);
VisiblePosition start = VisiblePosition(m_start, m_affinity);
VisiblePosition originalEnd(m_end, m_affinity);
EWordSide side = RightWordIfOnBoundary;
if (isEndOfEditableOrNonEditableContent(start) || (isEndOfLine(start) && !isStartOfLine(start) && !isEndOfParagraph(start)))
side = LeftWordIfOnBoundary;
m_start = startOfWord(start, side).deepEquivalent();
side = RightWordIfOnBoundary;
if (isEndOfEditableOrNonEditableContent(originalEnd) || (isEndOfLine(originalEnd) && !isStartOfLine(originalEnd) && !isEndOfParagraph(originalEnd)))
side = LeftWordIfOnBoundary;
VisiblePosition wordEnd(endOfWord(originalEnd, side));
VisiblePosition end(wordEnd);
if (isEndOfParagraph(originalEnd) && !isEmptyTableCell(m_start.deprecatedNode())) {
// Select the paragraph break (the space from the end of a paragraph to the start of
// the next one) to match TextEdit.
end = wordEnd.next();
if (Node* table = isFirstPositionAfterTable(end)) {
// The paragraph break after the last paragraph in the last cell of a block table ends
// at the start of the paragraph after the table.
if (isBlock(table))
end = end.next(CannotCrossEditingBoundary);
else
end = wordEnd;
}
if (end.isNull())
end = wordEnd;
}
m_end = end.deepEquivalent();
// End must not be before start.
if (m_start.deprecatedNode() == m_end.deprecatedNode() && m_start.deprecatedEditingOffset() > m_end.deprecatedEditingOffset()) {
Position swap(m_start);
m_start = m_end;
m_end = swap;
}
break;
}
case SentenceGranularity: {
m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
break;
}
case LineGranularity: {
m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
VisiblePosition end = endOfLine(VisiblePosition(m_end, m_affinity));
// If the end of this line is at the end of a paragraph, include the space
// after the end of the line in the selection.
if (isEndOfParagraph(end)) {
VisiblePosition next = end.next();
if (next.isNotNull())
end = next;
}
m_end = end.deepEquivalent();
break;
}
case LineBoundary:
m_start = startOfLine(VisiblePosition(m_start, m_affinity)).deepEquivalent();
m_end = endOfLine(VisiblePosition(m_end, m_affinity)).deepEquivalent();
break;
case ParagraphGranularity: {
VisiblePosition pos(m_start, m_affinity);
if (isStartOfLine(pos) && isEndOfEditableOrNonEditableContent(pos))
pos = pos.previous();
m_start = startOfParagraph(pos).deepEquivalent();
VisiblePosition visibleParagraphEnd = endOfParagraph(VisiblePosition(m_end, m_affinity));
// Include the "paragraph break" (the space from the end of this paragraph to the start
// of the next one) in the selection.
VisiblePosition end(visibleParagraphEnd.next());
if (Node* table = isFirstPositionAfterTable(end)) {
// The paragraph break after the last paragraph in the last cell of a block table ends
// at the start of the paragraph after the table, not at the position just after the table.
if (isBlock(table))
end = end.next(CannotCrossEditingBoundary);
// There is no parargraph break after the last paragraph in the last cell of an inline table.
else
end = visibleParagraphEnd;
}
if (end.isNull())
end = visibleParagraphEnd;
m_end = end.deepEquivalent();
break;
}
case DocumentBoundary:
m_start = startOfDocument(VisiblePosition(m_start, m_affinity)).deepEquivalent();
m_end = endOfDocument(VisiblePosition(m_end, m_affinity)).deepEquivalent();
break;
case ParagraphBoundary:
m_start = startOfParagraph(VisiblePosition(m_start, m_affinity)).deepEquivalent();
m_end = endOfParagraph(VisiblePosition(m_end, m_affinity)).deepEquivalent();
break;
case SentenceBoundary:
m_start = startOfSentence(VisiblePosition(m_start, m_affinity)).deepEquivalent();
m_end = endOfSentence(VisiblePosition(m_end, m_affinity)).deepEquivalent();
break;
case DocumentGranularity:
ASSERT_NOT_REACHED();
break;
}
// Make sure we do not have a dangling start or end.
if (m_start.isNull())
m_start = m_end;
if (m_end.isNull())
m_end = m_start;
}