~ubuntu-branches/ubuntu/raring/qtwebkit-source/raring-proposed

InsertParagraphSeparatorCommand::InsertParagraphSeparatorCommand(Document *document, bool mustUseDefaultParagraphElement, bool pasteBlockqutoeIntoUnquotedArea)

: CompositeEditCommand(document)

, m_mustUseDefaultParagraphElement(mustUseDefaultParagraphElement)

, m_pasteBlockqutoeIntoUnquotedArea(pasteBlockqutoeIntoUnquotedArea)

{

}

bool InsertParagraphSeparatorCommand::preservesTypingStyle() const

{

return true;

}

void InsertParagraphSeparatorCommand::calculateStyleBeforeInsertion(const Position &pos)

{

// It is only important to set a style to apply later if we're at the boundaries of

// a paragraph. Otherwise, content that is moved as part of the work of the command

// will lend their styles to the new paragraph without any extra work needed.

VisiblePosition visiblePos(pos, VP_DEFAULT_AFFINITY);

if (!isStartOfParagraph(visiblePos) && !isEndOfParagraph(visiblePos))

return;

ASSERT(pos.isNotNull());

m_style = EditingStyle::create(pos);

m_style->mergeTypingStyle(pos.anchorNode()->document());

}

void InsertParagraphSeparatorCommand::applyStyleAfterInsertion(Node* originalEnclosingBlock)

{

// Not only do we break out of header tags, but we also do not preserve the typing style,

// in order to match other browsers.

if (originalEnclosingBlock->hasTagName(h1Tag) ||

originalEnclosingBlock->hasTagName(h2Tag) ||

originalEnclosingBlock->hasTagName(h3Tag) ||

originalEnclosingBlock->hasTagName(h4Tag) ||

originalEnclosingBlock->hasTagName(h5Tag))

return;

if (!m_style)

return;

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m_style->prepareToApplyAt(endingSelection().start());

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if (!m_style->isEmpty())

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applyStyle(m_style.get());

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}

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bool InsertParagraphSeparatorCommand::shouldUseDefaultParagraphElement(Node* enclosingBlock) const

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{

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if (m_mustUseDefaultParagraphElement)

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return true;

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// Assumes that if there was a range selection, it was already deleted.

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if (!isEndOfBlock(endingSelection().visibleStart()))

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return false;

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return enclosingBlock->hasTagName(h1Tag) ||

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enclosingBlock->hasTagName(h2Tag) ||

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enclosingBlock->hasTagName(h3Tag) ||

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enclosingBlock->hasTagName(h4Tag) ||

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enclosingBlock->hasTagName(h5Tag);

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}

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void InsertParagraphSeparatorCommand::getAncestorsInsideBlock(const Node* insertionNode, Element* outerBlock, Vector<Element*>& ancestors)

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{

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ancestors.clear();

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// Build up list of ancestors elements between the insertion node and the outer block.

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if (insertionNode != outerBlock) {

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for (Element* n = insertionNode->parentElement(); n && n != outerBlock; n = n->parentElement())

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ancestors.append(n);

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}

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}

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PassRefPtr<Element> InsertParagraphSeparatorCommand::cloneHierarchyUnderNewBlock(const Vector<Element*>& ancestors, PassRefPtr<Element> blockToInsert)

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{

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// Make clones of ancestors in between the start node and the start block.

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RefPtr<Element> parent = blockToInsert;

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for (size_t i = ancestors.size(); i != 0; --i) {

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RefPtr<Element> child = ancestors[i - 1]->cloneElementWithoutChildren();

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// It should always be okay to remove id from the cloned elements, since the originals are not deleted.

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child->removeAttribute(idAttr);

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appendNode(child, parent);

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parent = child.release();

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}

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return parent.release();

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}

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void InsertParagraphSeparatorCommand::doApply()

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{

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if (!endingSelection().isNonOrphanedCaretOrRange())

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return;

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Position insertionPosition = endingSelection().start();

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EAffinity affinity = endingSelection().affinity();

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// Delete the current selection.

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if (endingSelection().isRange()) {

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calculateStyleBeforeInsertion(insertionPosition);

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deleteSelection(false, true);

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insertionPosition = endingSelection().start();

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affinity = endingSelection().affinity();

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}

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// FIXME: The parentAnchoredEquivalent conversion needs to be moved into enclosingBlock.

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RefPtr<Element> startBlock = enclosingBlock(insertionPosition.parentAnchoredEquivalent().containerNode());

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Position canonicalPos = VisiblePosition(insertionPosition).deepEquivalent();

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if (!startBlock

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|| !startBlock->nonShadowBoundaryParentNode()

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|| isTableCell(startBlock.get())

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|| startBlock->hasTagName(formTag)

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// 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

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|| (!canonicalPos.isNull() && canonicalPos.deprecatedNode()->renderer() && canonicalPos.deprecatedNode()->renderer()->isTable())

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|| (!canonicalPos.isNull() && canonicalPos.deprecatedNode()->hasTagName(hrTag))) {

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applyCommandToComposite(InsertLineBreakCommand::create(document()));

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return;

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}

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// Use the leftmost candidate.

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insertionPosition = insertionPosition.upstream();

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if (!insertionPosition.isCandidate())

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insertionPosition = insertionPosition.downstream();

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// Adjust the insertion position after the delete

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insertionPosition = positionAvoidingSpecialElementBoundary(insertionPosition);

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VisiblePosition visiblePos(insertionPosition, affinity);

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calculateStyleBeforeInsertion(insertionPosition);

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//---------------------------------------------------------------------

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// Handle special case of typing return on an empty list item

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if (breakOutOfEmptyListItem())

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return;

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//---------------------------------------------------------------------

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// Prepare for more general cases.

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bool isFirstInBlock = isStartOfBlock(visiblePos);

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bool isLastInBlock = isEndOfBlock(visiblePos);

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bool nestNewBlock = false;

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// Create block to be inserted.

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RefPtr<Element> blockToInsert;

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if (startBlock->isRootEditableElement()) {

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blockToInsert = createDefaultParagraphElement(document());

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nestNewBlock = true;

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} else if (shouldUseDefaultParagraphElement(startBlock.get()))

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blockToInsert = createDefaultParagraphElement(document());

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else

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blockToInsert = startBlock->cloneElementWithoutChildren();

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//---------------------------------------------------------------------

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// Handle case when position is in the last visible position in its block,

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// including when the block is empty.

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if (isLastInBlock) {

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if (nestNewBlock) {

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if (isFirstInBlock && !lineBreakExistsAtVisiblePosition(visiblePos)) {

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// The block is empty. Create an empty block to

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// represent the paragraph that we're leaving.

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RefPtr<Element> extraBlock = createDefaultParagraphElement(document());

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appendNode(extraBlock, startBlock);

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appendBlockPlaceholder(extraBlock);

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}

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appendNode(blockToInsert, startBlock);

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} else {

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// We can get here if we pasted a copied portion of a blockquote with a newline at the end and are trying to paste it

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// into an unquoted area. We then don't want the newline within the blockquote or else it will also be quoted.

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if (m_pasteBlockqutoeIntoUnquotedArea) {

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if (Node* highestBlockquote = highestEnclosingNodeOfType(canonicalPos, &isMailBlockquote))

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startBlock = static_cast<Element*>(highestBlockquote);

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}

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// Most of the time we want to stay at the nesting level of the startBlock (e.g., when nesting within lists). However,

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// for div nodes, this can result in nested div tags that are hard to break out of.

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Element* siblingNode = startBlock.get();

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if (blockToInsert->hasTagName(divTag))

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siblingNode = highestVisuallyEquivalentDivBelowRoot(startBlock.get());

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insertNodeAfter(blockToInsert, siblingNode);

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}

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// Recreate the same structure in the new paragraph.

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Vector<Element*> ancestors;

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getAncestorsInsideBlock(positionOutsideTabSpan(insertionPosition).deprecatedNode(), startBlock.get(), ancestors);

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RefPtr<Element> parent = cloneHierarchyUnderNewBlock(ancestors, blockToInsert);

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appendBlockPlaceholder(parent);

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setEndingSelection(VisibleSelection(firstPositionInNode(parent.get()), DOWNSTREAM, endingSelection().isDirectional()));

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return;

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}

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//---------------------------------------------------------------------

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// Handle case when position is in the first visible position in its block, and

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// similar case where previous position is in another, presumeably nested, block.

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if (isFirstInBlock || !inSameBlock(visiblePos, visiblePos.previous())) {

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Node *refNode;

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insertionPosition = positionOutsideTabSpan(insertionPosition);

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if (isFirstInBlock && !nestNewBlock)

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refNode = startBlock.get();

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else if (isFirstInBlock && nestNewBlock) {

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// startBlock should always have children, otherwise isLastInBlock would be true and it's handled above.

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ASSERT(startBlock->firstChild());

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refNode = startBlock->firstChild();

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}

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else if (insertionPosition.deprecatedNode() == startBlock && nestNewBlock) {

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refNode = startBlock->childNode(insertionPosition.deprecatedEditingOffset());

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ASSERT(refNode); // must be true or we'd be in the end of block case

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} else

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refNode = insertionPosition.deprecatedNode();

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// find ending selection position easily before inserting the paragraph

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insertionPosition = insertionPosition.downstream();

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insertNodeBefore(blockToInsert, refNode);

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// Recreate the same structure in the new paragraph.

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Vector<Element*> ancestors;

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getAncestorsInsideBlock(positionAvoidingSpecialElementBoundary(positionOutsideTabSpan(insertionPosition)).deprecatedNode(), startBlock.get(), ancestors);

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appendBlockPlaceholder(cloneHierarchyUnderNewBlock(ancestors, blockToInsert));

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// In this case, we need to set the new ending selection.

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setEndingSelection(VisibleSelection(insertionPosition, DOWNSTREAM, endingSelection().isDirectional()));

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return;

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}

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//---------------------------------------------------------------------

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// Handle the (more complicated) general case,

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// All of the content in the current block after visiblePos is

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// about to be wrapped in a new paragraph element. Add a br before

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// it if visiblePos is at the start of a paragraph so that the

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// content will move down a line.

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if (isStartOfParagraph(visiblePos)) {

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RefPtr<Element> br = createBreakElement(document());

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insertNodeAt(br.get(), insertionPosition);

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insertionPosition = positionInParentAfterNode(br.get());

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// If the insertion point is a break element, there is nothing else

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// we need to do.

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if (visiblePos.deepEquivalent().anchorNode()->renderer()->isBR()) {

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setEndingSelection(VisibleSelection(insertionPosition, DOWNSTREAM, endingSelection().isDirectional()));

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return;

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}

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}

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// Move downstream. Typing style code will take care of carrying along the

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// style of the upstream position.

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insertionPosition = insertionPosition.downstream();

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// At this point, the insertionPosition's node could be a container, and we want to make sure we include

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// all of the correct nodes when building the ancestor list. So this needs to be the deepest representation of the position

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// before we walk the DOM tree.

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insertionPosition = positionOutsideTabSpan(VisiblePosition(insertionPosition).deepEquivalent());

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// Make sure we do not cause a rendered space to become unrendered.

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// FIXME: We need the affinity for pos, but pos.downstream() does not give it

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Position leadingWhitespace = insertionPosition.leadingWhitespacePosition(VP_DEFAULT_AFFINITY);

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// FIXME: leadingWhitespacePosition is returning the position before preserved newlines for positions

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// after the preserved newline, causing the newline to be turned into a nbsp.

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if (leadingWhitespace.isNotNull() && leadingWhitespace.deprecatedNode()->isTextNode()) {

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Text* textNode = toText(leadingWhitespace.deprecatedNode());

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ASSERT(!textNode->renderer() || textNode->renderer()->style()->collapseWhiteSpace());

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replaceTextInNodePreservingMarkers(textNode, leadingWhitespace.deprecatedEditingOffset(), 1, nonBreakingSpaceString());

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}

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// Split at pos if in the middle of a text node.

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Position positionAfterSplit;

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if (insertionPosition.anchorType() == Position::PositionIsOffsetInAnchor && insertionPosition.containerNode()->isTextNode()) {

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RefPtr<Text> textNode = toText(insertionPosition.containerNode());

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bool atEnd = static_cast<unsigned>(insertionPosition.offsetInContainerNode()) >= textNode->length();

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if (insertionPosition.deprecatedEditingOffset() > 0 && !atEnd) {

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splitTextNode(textNode, insertionPosition.offsetInContainerNode());

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positionAfterSplit = firstPositionInNode(textNode.get());

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insertionPosition.moveToPosition(textNode->previousSibling(), insertionPosition.offsetInContainerNode());

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visiblePos = VisiblePosition(insertionPosition);

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}

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}

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// If we got detached due to mutation events, just bail out.

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if (!startBlock->parentNode())

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return;

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// Put the added block in the tree.

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if (nestNewBlock)

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appendNode(blockToInsert.get(), startBlock);

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else

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insertNodeAfter(blockToInsert.get(), startBlock);

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document()->updateLayoutIgnorePendingStylesheets();

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// If the paragraph separator was inserted at the end of a paragraph, an empty line must be

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// created. All of the nodes, starting at visiblePos, are about to be added to the new paragraph

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// element. If the first node to be inserted won't be one that will hold an empty line open, add a br.

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if (isEndOfParagraph(visiblePos) && !lineBreakExistsAtVisiblePosition(visiblePos))

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appendNode(createBreakElement(document()).get(), blockToInsert.get());

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// Move the start node and the siblings of the start node.

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if (VisiblePosition(insertionPosition) != VisiblePosition(positionBeforeNode(blockToInsert.get()))) {

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Node* n;

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if (insertionPosition.containerNode() == startBlock)

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n = insertionPosition.computeNodeAfterPosition();

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else {

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Node* splitTo = insertionPosition.containerNode();

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if (splitTo->isTextNode() && insertionPosition.offsetInContainerNode() >= caretMaxOffset(splitTo))

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splitTo = splitTo->traverseNextNode(startBlock.get());

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ASSERT(splitTo);

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splitTreeToNode(splitTo, startBlock.get());

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for (n = startBlock->firstChild(); n; n = n->nextSibling()) {

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if (comparePositions(VisiblePosition(insertionPosition), positionBeforeNode(n)) <= 0)

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break;

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}

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}

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moveRemainingSiblingsToNewParent(n, blockToInsert.get(), blockToInsert);

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}

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// Handle whitespace that occurs after the split

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if (positionAfterSplit.isNotNull()) {

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document()->updateLayoutIgnorePendingStylesheets();

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if (!positionAfterSplit.isRenderedCharacter()) {

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// Clear out all whitespace and insert one non-breaking space

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ASSERT(!positionAfterSplit.containerNode()->renderer() || positionAfterSplit.containerNode()->renderer()->style()->collapseWhiteSpace());

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deleteInsignificantTextDownstream(positionAfterSplit);

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if (positionAfterSplit.deprecatedNode()->isTextNode())

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insertTextIntoNode(toText(positionAfterSplit.containerNode()), 0, nonBreakingSpaceString());

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}

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}

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setEndingSelection(VisibleSelection(firstPositionInNode(blockToInsert.get()), DOWNSTREAM, endingSelection().isDirectional()));

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applyStyleAfterInsertion(startBlock.get());

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}

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} // namespace WebCore

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