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27 #include "InsertParagraphSeparatorCommand.h"
29 #include "CSSPropertyNames.h"
31 #include "EditingStyle.h"
32 #include "HTMLElement.h"
33 #include "HTMLNames.h"
34 #include "InsertLineBreakCommand.h"
35 #include "RenderObject.h"
37 #include "htmlediting.h"
38 #include "visible_units.h"
42 using namespace HTMLNames;
44 // When inserting a new line, we want to avoid nesting empty divs if we can. Otherwise, when
45 // pasting, it's easy to have each new line be a div deeper than the previous. E.g., in the case
46 // below, we want to insert at ^ instead of |.
47 // <div>foo<div>bar</div>|</div>^
48 static Element* highestVisuallyEquivalentDivBelowRoot(Element* startBlock)
50 Element* curBlock = startBlock;
51 // We don't want to return a root node (if it happens to be a div, e.g., in a document fragment) because there are no
52 // siblings for us to append to.
53 while (!curBlock->nextSibling() && curBlock->parentElement()->hasTagName(divTag) && curBlock->parentElement()->parentElement()) {
54 if (curBlock->parentElement()->hasAttributes())
56 curBlock = curBlock->parentElement();
61 InsertParagraphSeparatorCommand::InsertParagraphSeparatorCommand(Document *document, bool mustUseDefaultParagraphElement, bool pasteBlockqutoeIntoUnquotedArea)
62 : CompositeEditCommand(document)
63 , m_mustUseDefaultParagraphElement(mustUseDefaultParagraphElement)
64 , m_pasteBlockqutoeIntoUnquotedArea(pasteBlockqutoeIntoUnquotedArea)
68 bool InsertParagraphSeparatorCommand::preservesTypingStyle() const
73 void InsertParagraphSeparatorCommand::calculateStyleBeforeInsertion(const Position &pos)
75 // It is only important to set a style to apply later if we're at the boundaries of
76 // a paragraph. Otherwise, content that is moved as part of the work of the command
77 // will lend their styles to the new paragraph without any extra work needed.
78 VisiblePosition visiblePos(pos, VP_DEFAULT_AFFINITY);
79 if (!isStartOfParagraph(visiblePos) && !isEndOfParagraph(visiblePos))
82 ASSERT(pos.isNotNull());
83 m_style = EditingStyle::create(pos);
84 m_style->mergeTypingStyle(pos.anchorNode()->document());
87 void InsertParagraphSeparatorCommand::applyStyleAfterInsertion(Node* originalEnclosingBlock)
89 // Not only do we break out of header tags, but we also do not preserve the typing style,
90 // in order to match other browsers.
91 if (originalEnclosingBlock->hasTagName(h1Tag) ||
92 originalEnclosingBlock->hasTagName(h2Tag) ||
93 originalEnclosingBlock->hasTagName(h3Tag) ||
94 originalEnclosingBlock->hasTagName(h4Tag) ||
95 originalEnclosingBlock->hasTagName(h5Tag))
101 m_style->prepareToApplyAt(endingSelection().start());
102 if (!m_style->isEmpty())
103 applyStyle(m_style.get());
106 bool InsertParagraphSeparatorCommand::shouldUseDefaultParagraphElement(Node* enclosingBlock) const
108 if (m_mustUseDefaultParagraphElement)
111 // Assumes that if there was a range selection, it was already deleted.
112 if (!isEndOfBlock(endingSelection().visibleStart()))
115 return enclosingBlock->hasTagName(h1Tag) ||
116 enclosingBlock->hasTagName(h2Tag) ||
117 enclosingBlock->hasTagName(h3Tag) ||
118 enclosingBlock->hasTagName(h4Tag) ||
119 enclosingBlock->hasTagName(h5Tag);
122 void InsertParagraphSeparatorCommand::getAncestorsInsideBlock(const Node* insertionNode, Element* outerBlock, Vector<Element*>& ancestors)
126 // Build up list of ancestors elements between the insertion node and the outer block.
127 if (insertionNode != outerBlock) {
128 for (Element* n = insertionNode->parentElement(); n && n != outerBlock; n = n->parentElement())
133 PassRefPtr<Element> InsertParagraphSeparatorCommand::cloneHierarchyUnderNewBlock(const Vector<Element*>& ancestors, PassRefPtr<Element> blockToInsert)
135 // Make clones of ancestors in between the start node and the start block.
136 RefPtr<Element> parent = blockToInsert;
137 for (size_t i = ancestors.size(); i != 0; --i) {
138 RefPtr<Element> child = ancestors[i - 1]->cloneElementWithoutChildren();
139 // It should always be okay to remove id from the cloned elements, since the originals are not deleted.
140 child->removeAttribute(idAttr);
141 appendNode(child, parent);
142 parent = child.release();
145 return parent.release();
148 void InsertParagraphSeparatorCommand::doApply()
150 bool splitText = false;
151 if (!endingSelection().isNonOrphanedCaretOrRange())
154 Position insertionPosition = endingSelection().start();
156 EAffinity affinity = endingSelection().affinity();
158 // Delete the current selection.
159 if (endingSelection().isRange()) {
160 calculateStyleBeforeInsertion(insertionPosition);
161 deleteSelection(false, true);
162 insertionPosition = endingSelection().start();
163 affinity = endingSelection().affinity();
166 // FIXME: The parentAnchoredEquivalent conversion needs to be moved into enclosingBlock.
167 RefPtr<Element> startBlock = enclosingBlock(insertionPosition.parentAnchoredEquivalent().containerNode());
168 Position canonicalPos = VisiblePosition(insertionPosition).deepEquivalent();
170 || !startBlock->nonShadowBoundaryParentNode()
171 || isTableCell(startBlock.get())
172 || startBlock->hasTagName(formTag)
173 // 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
174 || (!canonicalPos.isNull() && canonicalPos.deprecatedNode()->renderer() && canonicalPos.deprecatedNode()->renderer()->isTable())
175 || (!canonicalPos.isNull() && canonicalPos.deprecatedNode()->hasTagName(hrTag))) {
176 applyCommandToComposite(InsertLineBreakCommand::create(document()));
180 // Use the leftmost candidate.
181 insertionPosition = insertionPosition.upstream();
182 if (!insertionPosition.isCandidate())
183 insertionPosition = insertionPosition.downstream();
185 // Adjust the insertion position after the delete
186 insertionPosition = positionAvoidingSpecialElementBoundary(insertionPosition);
187 VisiblePosition visiblePos(insertionPosition, affinity);
188 calculateStyleBeforeInsertion(insertionPosition);
190 //---------------------------------------------------------------------
191 // Handle special case of typing return on an empty list item
192 if (breakOutOfEmptyListItem())
195 //---------------------------------------------------------------------
196 // Prepare for more general cases.
198 bool isFirstInBlock = isStartOfBlock(visiblePos);
199 bool isLastInBlock = isEndOfBlock(visiblePos);
200 bool nestNewBlock = false;
202 // Create block to be inserted.
203 RefPtr<Element> blockToInsert;
204 if (startBlock->isRootEditableElement()) {
205 blockToInsert = createDefaultParagraphElement(document());
207 } else if (shouldUseDefaultParagraphElement(startBlock.get()))
208 blockToInsert = createDefaultParagraphElement(document());
210 blockToInsert = startBlock->cloneElementWithoutChildren();
212 //---------------------------------------------------------------------
213 // Handle case when position is in the last visible position in its block,
214 // including when the block is empty.
217 if (isFirstInBlock && !lineBreakExistsAtVisiblePosition(visiblePos)) {
218 // The block is empty. Create an empty block to
219 // represent the paragraph that we're leaving.
220 RefPtr<Element> extraBlock = createDefaultParagraphElement(document());
221 appendNode(extraBlock, startBlock);
222 appendBlockPlaceholder(extraBlock);
224 appendNode(blockToInsert, startBlock);
226 // 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
227 // into an unquoted area. We then don't want the newline within the blockquote or else it will also be quoted.
228 if (m_pasteBlockqutoeIntoUnquotedArea) {
229 if (Node* highestBlockquote = highestEnclosingNodeOfType(canonicalPos, &isMailBlockquote))
230 startBlock = static_cast<Element*>(highestBlockquote);
233 // Most of the time we want to stay at the nesting level of the startBlock (e.g., when nesting within lists). However,
234 // for div nodes, this can result in nested div tags that are hard to break out of.
235 Element* siblingNode = startBlock.get();
236 if (blockToInsert->hasTagName(divTag))
237 siblingNode = highestVisuallyEquivalentDivBelowRoot(startBlock.get());
238 insertNodeAfter(blockToInsert, siblingNode);
241 // Recreate the same structure in the new paragraph.
243 Vector<Element*> ancestors;
244 getAncestorsInsideBlock(positionOutsideTabSpan(insertionPosition).deprecatedNode(), startBlock.get(), ancestors);
245 RefPtr<Element> parent = cloneHierarchyUnderNewBlock(ancestors, blockToInsert);
247 appendBlockPlaceholder(parent);
249 setEndingSelection(VisibleSelection(firstPositionInNode(parent.get()), DOWNSTREAM, endingSelection().isDirectional()));
254 //---------------------------------------------------------------------
255 // Handle case when position is in the first visible position in its block, and
256 // similar case where previous position is in another, presumeably nested, block.
257 if (isFirstInBlock || !inSameBlock(visiblePos, visiblePos.previous())) {
260 insertionPosition = positionOutsideTabSpan(insertionPosition);
262 if (isFirstInBlock && !nestNewBlock)
263 refNode = startBlock.get();
264 else if (isFirstInBlock && nestNewBlock) {
265 // startBlock should always have children, otherwise isLastInBlock would be true and it's handled above.
266 ASSERT(startBlock->firstChild());
267 refNode = startBlock->firstChild();
269 else if (insertionPosition.deprecatedNode() == startBlock && nestNewBlock) {
270 refNode = startBlock->childNode(insertionPosition.deprecatedEditingOffset());
271 ASSERT(refNode); // must be true or we'd be in the end of block case
273 refNode = insertionPosition.deprecatedNode();
275 // find ending selection position easily before inserting the paragraph
276 insertionPosition = insertionPosition.downstream();
278 insertNodeBefore(blockToInsert, refNode);
280 // Recreate the same structure in the new paragraph.
282 Vector<Element*> ancestors;
283 getAncestorsInsideBlock(positionAvoidingSpecialElementBoundary(positionOutsideTabSpan(insertionPosition)).deprecatedNode(), startBlock.get(), ancestors);
285 appendBlockPlaceholder(cloneHierarchyUnderNewBlock(ancestors, blockToInsert));
287 // In this case, we need to set the new ending selection.
288 setEndingSelection(VisibleSelection(insertionPosition, DOWNSTREAM, endingSelection().isDirectional()));
292 //---------------------------------------------------------------------
293 // Handle the (more complicated) general case,
295 // All of the content in the current block after visiblePos is
296 // about to be wrapped in a new paragraph element. Add a br before
297 // it if visiblePos is at the start of a paragraph so that the
298 // content will move down a line.
299 if (isStartOfParagraph(visiblePos)) {
300 RefPtr<Element> br = createBreakElement(document());
301 insertNodeAt(br.get(), insertionPosition);
302 insertionPosition = positionInParentAfterNode(br.get());
303 // If the insertion point is a break element, there is nothing else
305 if (visiblePos.deepEquivalent().anchorNode()->renderer()->isBR()) {
306 setEndingSelection(VisibleSelection(insertionPosition, DOWNSTREAM, endingSelection().isDirectional()));
311 // Move downstream. Typing style code will take care of carrying along the
312 // style of the upstream position.
313 insertionPosition = insertionPosition.downstream();
315 // At this point, the insertionPosition's node could be a container, and we want to make sure we include
316 // all of the correct nodes when building the ancestor list. So this needs to be the deepest representation of the position
317 // before we walk the DOM tree.
318 insertionPosition = positionOutsideTabSpan(VisiblePosition(insertionPosition).deepEquivalent());
320 // Make sure we do not cause a rendered space to become unrendered.
321 // FIXME: We need the affinity for pos, but pos.downstream() does not give it
322 Position leadingWhitespace = insertionPosition.leadingWhitespacePosition(VP_DEFAULT_AFFINITY);
323 // FIXME: leadingWhitespacePosition is returning the position before preserved newlines for positions
324 // after the preserved newline, causing the newline to be turned into a nbsp.
325 if (leadingWhitespace.isNotNull() && leadingWhitespace.deprecatedNode()->isTextNode()) {
326 Text* textNode = toText(leadingWhitespace.deprecatedNode());
327 ASSERT(!textNode->renderer() || textNode->renderer()->style()->collapseWhiteSpace());
328 replaceTextInNodePreservingMarkers(textNode, leadingWhitespace.deprecatedEditingOffset(), 1, nonBreakingSpaceString());
331 // Split at pos if in the middle of a text node.
332 if (insertionPosition.deprecatedNode()->isTextNode()) {
333 Text* textNode = toText(insertionPosition.deprecatedNode());
334 bool atEnd = (unsigned)insertionPosition.deprecatedEditingOffset() >= textNode->length();
335 if (insertionPosition.deprecatedEditingOffset() > 0 && !atEnd) {
336 splitTextNode(textNode, insertionPosition.deprecatedEditingOffset());
337 insertionPosition.moveToOffset(0);
338 visiblePos = VisiblePosition(insertionPosition);
343 // If we got detached due to mutation events, just bail out.
344 if (!startBlock->parentNode())
347 // Put the added block in the tree.
349 appendNode(blockToInsert.get(), startBlock);
351 insertNodeAfter(blockToInsert.get(), startBlock);
353 document()->updateLayoutIgnorePendingStylesheets();
355 // If the paragraph separator was inserted at the end of a paragraph, an empty line must be
356 // created. All of the nodes, starting at visiblePos, are about to be added to the new paragraph
357 // element. If the first node to be inserted won't be one that will hold an empty line open, add a br.
358 if (isEndOfParagraph(visiblePos) && !lineBreakExistsAtVisiblePosition(visiblePos))
359 appendNode(createBreakElement(document()).get(), blockToInsert.get());
361 // Move the start node and the siblings of the start node.
362 if (VisiblePosition(insertionPosition) != VisiblePosition(positionBeforeNode(blockToInsert.get()))) {
364 #if ENABLE(TIZEN_PARAGRAPH_SEPARATOR_FIX)
365 if (insertionPosition.containerNode() == startBlock
366 || (insertionPosition.containerNode()->parentNode() && insertionPosition.containerNode()->hasChildNodes() && insertionPosition.containerNode()->parentNode() == startBlock))
368 if (insertionPosition.containerNode() == startBlock)
370 n = insertionPosition.computeNodeAfterPosition();
372 Node* splitTo = insertionPosition.containerNode();
373 if (splitTo->isTextNode() && insertionPosition.offsetInContainerNode() >= caretMaxOffset(splitTo))
374 splitTo = splitTo->traverseNextNode(startBlock.get());
376 splitTreeToNode(splitTo, startBlock.get());
378 for (n = startBlock->firstChild(); n; n = n->nextSibling()) {
379 if (comparePositions(VisiblePosition(insertionPosition), positionBeforeNode(n)) <= 0)
384 moveRemainingSiblingsToNewParent(n, blockToInsert.get(), blockToInsert);
387 // Handle whitespace that occurs after the split
389 document()->updateLayoutIgnorePendingStylesheets();
390 if (insertionPosition.anchorType() == Position::PositionIsOffsetInAnchor)
391 insertionPosition.moveToOffset(0);
392 if (!insertionPosition.isRenderedCharacter()) {
393 // Clear out all whitespace and insert one non-breaking space
394 ASSERT(!insertionPosition.deprecatedNode()->renderer() || insertionPosition.deprecatedNode()->renderer()->style()->collapseWhiteSpace());
395 deleteInsignificantTextDownstream(insertionPosition);
396 if (insertionPosition.deprecatedNode()->isTextNode())
397 insertTextIntoNode(toText(insertionPosition.deprecatedNode()), 0, nonBreakingSpaceString());
401 setEndingSelection(VisibleSelection(firstPositionInNode(blockToInsert.get()), DOWNSTREAM, endingSelection().isDirectional()));
402 applyStyleAfterInsertion(startBlock.get());
405 } // namespace WebCore