void InsertParagraphSeparatorCommand::doApply()
{
if (!endingSelection().isNonOrphanedCaretOrRange())
return;
Position insertionPosition = endingSelection().start();
EAffinity affinity = endingSelection().affinity();
// Delete the current selection.
if (endingSelection().isRange()) {
calculateStyleBeforeInsertion(insertionPosition);
deleteSelection(false, true);
insertionPosition = endingSelection().start();
affinity = endingSelection().affinity();
}
// FIXME: The parentAnchoredEquivalent conversion needs to be moved into enclosingBlock.
RefPtr<Element> startBlock = enclosingBlock(insertionPosition.parentAnchoredEquivalent().containerNode());
Position canonicalPos = VisiblePosition(insertionPosition).deepEquivalent();
if (!startBlock
|| !startBlock->nonShadowBoundaryParentNode()
// FIXME: If the node is hidden, we don't have a canonical position so we will do the wrong thing for tables and <hr>. https://bugs.webkit.org/show_bug.cgi?id=40342
|| (!canonicalPos.isNull() && isRenderedTableElement(canonicalPos.deprecatedNode()))) {
applyCommandToComposite(InsertLineBreakCommand::create(document()));
return;
}
// Use the leftmost candidate.
insertionPosition = insertionPosition.upstream();
if (!insertionPosition.isCandidate())
insertionPosition = insertionPosition.downstream();
// Adjust the insertion position after the delete
insertionPosition = positionAvoidingSpecialElementBoundary(insertionPosition);
VisiblePosition visiblePos(insertionPosition, affinity);
calculateStyleBeforeInsertion(insertionPosition);
//---------------------------------------------------------------------
// Handle special case of typing return on an empty list item
if (breakOutOfEmptyListItem())
return;
//---------------------------------------------------------------------
// Prepare for more general cases.
bool isFirstInBlock = isStartOfBlock(visiblePos);
bool isLastInBlock = isEndOfBlock(visiblePos);
bool nestNewBlock = false;
// Create block to be inserted.
RefPtr<Element> blockToInsert = nullptr;
if (startBlock->isRootEditableElement()) {
blockToInsert = createDefaultParagraphElement(document());
nestNewBlock = true;
} else if (shouldUseDefaultParagraphElement(startBlock.get())) {
blockToInsert = createDefaultParagraphElement(document());
} else {
blockToInsert = startBlock->cloneElementWithoutChildren();
}
//---------------------------------------------------------------------
// Handle case when position is in the last visible position in its block,
// including when the block is empty.
if (isLastInBlock) {
if (nestNewBlock) {
if (isFirstInBlock && !lineBreakExistsAtVisiblePosition(visiblePos)) {
// The block is empty. Create an empty block to
// represent the paragraph that we're leaving.
RefPtr<HTMLElement> extraBlock = createDefaultParagraphElement(document());
appendNode(extraBlock, startBlock);
}
appendNode(blockToInsert, startBlock);
} else {
// Most of the time we want to stay at the nesting level of the startBlock (e.g., when nesting within lists). However,
// for div nodes, this can result in nested div tags that are hard to break out of.
Element* siblingElement = startBlock.get();
insertNodeAfter(blockToInsert, siblingElement);
}
// Recreate the same structure in the new paragraph.
Vector<RefPtr<Element> > ancestors;
getAncestorsInsideBlock(positionOutsideTabSpan(insertionPosition).deprecatedNode(), startBlock.get(), ancestors);
RefPtr<Element> parent = cloneHierarchyUnderNewBlock(ancestors, blockToInsert);
setEndingSelection(VisibleSelection(firstPositionInNode(parent.get()), DOWNSTREAM, endingSelection().isDirectional()));
return;
}
//---------------------------------------------------------------------
// Handle case when position is in the first visible position in its block, and
// similar case where previous position is in another, presumeably nested, block.
if (isFirstInBlock || !inSameBlock(visiblePos, visiblePos.previous())) {
Node* refNode = 0;
insertionPosition = positionOutsideTabSpan(insertionPosition);
if (isFirstInBlock && !nestNewBlock) {
refNode = startBlock.get();
} else if (isFirstInBlock && nestNewBlock) {
// startBlock should always have children, otherwise isLastInBlock would be true and it's handled above.
ASSERT(startBlock->hasChildren());
refNode = startBlock->firstChild();
}
else if (insertionPosition.deprecatedNode() == startBlock && nestNewBlock) {
refNode = NodeTraversal::childAt(*startBlock, insertionPosition.deprecatedEditingOffset());
ASSERT(refNode); // must be true or we'd be in the end of block case
} else
refNode = insertionPosition.deprecatedNode();
// find ending selection position easily before inserting the paragraph
insertionPosition = insertionPosition.downstream();
if (refNode)
insertNodeBefore(blockToInsert, refNode);
// Recreate the same structure in the new paragraph.
Vector<RefPtr<Element> > ancestors;
getAncestorsInsideBlock(positionAvoidingSpecialElementBoundary(positionOutsideTabSpan(insertionPosition)).deprecatedNode(), startBlock.get(), ancestors);
// In this case, we need to set the new ending selection.
setEndingSelection(VisibleSelection(insertionPosition, DOWNSTREAM, endingSelection().isDirectional()));
return;
}
//---------------------------------------------------------------------
// Handle the (more complicated) general case,
// Move downstream. Typing style code will take care of carrying along the
// style of the upstream position.
insertionPosition = insertionPosition.downstream();
// At this point, the insertionPosition's node could be a container, and we want to make sure we include
// all of the correct nodes when building the ancestor list. So this needs to be the deepest representation of the position
// before we walk the DOM tree.
insertionPosition = positionOutsideTabSpan(VisiblePosition(insertionPosition).deepEquivalent());
// If the returned position lies either at the end or at the start of an element that is ignored by editing
// we should move to its upstream or downstream position.
if (editingIgnoresContent(insertionPosition.deprecatedNode())) {
if (insertionPosition.atLastEditingPositionForNode())
insertionPosition = insertionPosition.downstream();
else if (insertionPosition.atFirstEditingPositionForNode())
insertionPosition = insertionPosition.upstream();
}
// Make sure we do not cause a rendered space to become unrendered.
// FIXME: We need the affinity for pos, but pos.downstream() does not give it
Position leadingWhitespace = leadingWhitespacePosition(insertionPosition, VP_DEFAULT_AFFINITY);
// FIXME: leadingWhitespacePosition is returning the position before preserved newlines for positions
// after the preserved newline, causing the newline to be turned into a nbsp.
if (leadingWhitespace.isNotNull() && leadingWhitespace.deprecatedNode()->isTextNode()) {
Text* textNode = toText(leadingWhitespace.deprecatedNode());
ASSERT(!textNode->renderer() || textNode->renderer()->style()->collapseWhiteSpace());
replaceTextInNodePreservingMarkers(textNode, leadingWhitespace.deprecatedEditingOffset(), 1, nonBreakingSpaceString());
}
// Split at pos if in the middle of a text node.
Position positionAfterSplit;
if (insertionPosition.anchorType() == Position::PositionIsOffsetInAnchor && insertionPosition.containerNode()->isTextNode()) {
RefPtr<Text> textNode = toText(insertionPosition.containerNode());
bool atEnd = static_cast<unsigned>(insertionPosition.offsetInContainerNode()) >= textNode->length();
if (insertionPosition.deprecatedEditingOffset() > 0 && !atEnd) {
splitTextNode(textNode, insertionPosition.offsetInContainerNode());
positionAfterSplit = firstPositionInNode(textNode.get());
insertionPosition.moveToPosition(textNode->previousSibling(), insertionPosition.offsetInContainerNode());
visiblePos = VisiblePosition(insertionPosition);
}
}
// If we got detached due to mutation events, just bail out.
if (!startBlock->parentNode())
return;
// Put the added block in the tree.
if (nestNewBlock) {
appendNode(blockToInsert.get(), startBlock);
} else {
insertNodeAfter(blockToInsert.get(), startBlock);
}
document().updateLayoutIgnorePendingStylesheets();
// Move the start node and the siblings of the start node.
if (VisiblePosition(insertionPosition) != VisiblePosition(positionBeforeNode(blockToInsert.get()))) {
Node* n;
if (insertionPosition.containerNode() == startBlock)
n = insertionPosition.computeNodeAfterPosition();
else {
Node* splitTo = insertionPosition.containerNode();
if (splitTo->isTextNode() && insertionPosition.offsetInContainerNode() >= caretMaxOffset(splitTo))
splitTo = NodeTraversal::next(*splitTo, startBlock.get());
ASSERT(splitTo);
splitTreeToNode(splitTo, startBlock.get());
for (n = startBlock->firstChild(); n; n = n->nextSibling()) {
VisiblePosition beforeNodePosition(positionBeforeNode(n));
if (!beforeNodePosition.isNull() && comparePositions(VisiblePosition(insertionPosition), beforeNodePosition) <= 0)
break;
}
}
moveRemainingSiblingsToNewParent(n, blockToInsert.get(), blockToInsert);
}
// Handle whitespace that occurs after the split
if (positionAfterSplit.isNotNull()) {
document().updateLayoutIgnorePendingStylesheets();
if (!positionAfterSplit.isRenderedCharacter()) {
// Clear out all whitespace and insert one non-breaking space
ASSERT(!positionAfterSplit.containerNode()->renderer() || positionAfterSplit.containerNode()->renderer()->style()->collapseWhiteSpace());
deleteInsignificantTextDownstream(positionAfterSplit);
if (positionAfterSplit.deprecatedNode()->isTextNode())
insertTextIntoNode(toText(positionAfterSplit.containerNode()), 0, nonBreakingSpaceString());
}
}
setEndingSelection(VisibleSelection(firstPositionInNode(blockToInsert.get()), DOWNSTREAM, endingSelection().isDirectional()));
}
DocumentFragment* createFragmentFromText(const EphemeralRange& context,
const String& text) {
if (context.isNull())
return nullptr;
Document& document = context.document();
DocumentFragment* fragment = document.createDocumentFragment();
if (text.isEmpty())
return fragment;
String string = text;
string.replace("\r\n", "\n");
string.replace('\r', '\n');
if (!isRichlyEditablePosition(context.startPosition()) ||
shouldPreserveNewline(context)) {
fragment->appendChild(document.createTextNode(string));
if (string.endsWith('\n')) {
HTMLBRElement* element = HTMLBRElement::create(document);
element->setAttribute(classAttr, AppleInterchangeNewline);
fragment->appendChild(element);
}
return fragment;
}
// A string with no newlines gets added inline, rather than being put into a
// paragraph.
if (string.find('\n') == kNotFound) {
fillContainerFromString(fragment, string);
return fragment;
}
// Break string into paragraphs. Extra line breaks turn into empty paragraphs.
Element* block =
enclosingBlock(context.startPosition().nodeAsRangeFirstNode());
bool useClonesOfEnclosingBlock =
block && !isHTMLBodyElement(*block) && !isHTMLHtmlElement(*block) &&
block != rootEditableElementOf(context.startPosition());
Vector<String> list;
string.split('\n', true, list); // true gets us empty strings in the list
size_t numLines = list.size();
for (size_t i = 0; i < numLines; ++i) {
const String& s = list[i];
Element* element = nullptr;
if (s.isEmpty() && i + 1 == numLines) {
// For last line, use the "magic BR" rather than a P.
element = HTMLBRElement::create(document);
element->setAttribute(classAttr, AppleInterchangeNewline);
} else {
if (useClonesOfEnclosingBlock)
element = block->cloneElementWithoutChildren();
else
element = createDefaultParagraphElement(document);
fillContainerFromString(element, s);
}
fragment->appendChild(element);
}
return fragment;
}