| /* |
| * Copyright (C) 2005, 2006 Apple Computer, Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "InsertParagraphSeparatorCommand.h" |
| |
| #include "CSSComputedStyleDeclaration.h" |
| #include "CSSMutableStyleDeclaration.h" |
| #include "CSSPropertyNames.h" |
| #include "Document.h" |
| #include "HTMLElement.h" |
| #include "HTMLNames.h" |
| #include "InsertLineBreakCommand.h" |
| #include "Logging.h" |
| #include "RenderObject.h" |
| #include "Text.h" |
| #include "htmlediting.h" |
| #include "visible_units.h" |
| #include "ApplyStyleCommand.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| InsertParagraphSeparatorCommand::InsertParagraphSeparatorCommand(Document *document, bool mustUseDefaultParagraphElement) |
| : CompositeEditCommand(document) |
| , m_mustUseDefaultParagraphElement(mustUseDefaultParagraphElement) |
| { |
| } |
| |
| 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; |
| |
| m_style = editingStyleAtPosition(pos, IncludeTypingStyle); |
| } |
| |
| 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; |
| |
| prepareEditingStyleToApplyAt(m_style.get(), endingSelection().start()); |
| |
| if (m_style->length() > 0) |
| applyStyle(m_style.get()); |
| } |
| |
| bool InsertParagraphSeparatorCommand::shouldUseDefaultParagraphElement(Node* enclosingBlock) const |
| { |
| if (m_mustUseDefaultParagraphElement) |
| return true; |
| |
| // Assumes that if there was a range selection, it was already deleted. |
| if (!isEndOfBlock(endingSelection().visibleStart())) |
| return false; |
| |
| return enclosingBlock->hasTagName(h1Tag) || |
| enclosingBlock->hasTagName(h2Tag) || |
| enclosingBlock->hasTagName(h3Tag) || |
| enclosingBlock->hasTagName(h4Tag) || |
| enclosingBlock->hasTagName(h5Tag); |
| } |
| |
| void InsertParagraphSeparatorCommand::doApply() |
| { |
| bool splitText = false; |
| if (endingSelection().isNone()) |
| 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 rangeCompliantEquivalent conversion needs to be moved into enclosingBlock. |
| Node* startBlockNode = enclosingBlock(rangeCompliantEquivalent(insertionPosition).node()); |
| Position canonicalPos = VisiblePosition(insertionPosition).deepEquivalent(); |
| Element* startBlock = static_cast<Element*>(startBlockNode); |
| if (!startBlockNode |
| || !startBlockNode->isElementNode() |
| || !startBlock->parentNode() |
| || isTableCell(startBlock) |
| || startBlock->hasTagName(formTag) |
| || (canonicalPos.node()->renderer() && canonicalPos.node()->renderer()->isTable()) |
| || canonicalPos.node()->hasTagName(hrTag)) { |
| 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; |
| if (startBlock == startBlock->rootEditableElement()) { |
| blockToInsert = createDefaultParagraphElement(document()); |
| nestNewBlock = true; |
| } else if (shouldUseDefaultParagraphElement(startBlock)) |
| 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) { |
| bool shouldApplyStyleAfterInsertion = true; |
| if (nestNewBlock) { |
| if (isFirstInBlock && !lineBreakExistsAtVisiblePosition(visiblePos)) { |
| // The block is empty. Create an empty block to |
| // represent the paragraph that we're leaving. |
| RefPtr<Element> extraBlock = createDefaultParagraphElement(document()); |
| appendNode(extraBlock, startBlock); |
| appendBlockPlaceholder(extraBlock); |
| } |
| appendNode(blockToInsert, startBlock); |
| } else { |
| // 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 |
| // into an unquoted area. We then don't want the newline within the blockquote or else it will also be quoted. |
| if (Node* highestBlockquote = highestEnclosingNodeOfType(canonicalPos, &isMailBlockquote)) { |
| startBlock = static_cast<Element*>(highestBlockquote); |
| // When inserting the newline after the blockquote, we don't want to apply the original style after the insertion |
| shouldApplyStyleAfterInsertion = false; |
| } |
| insertNodeAfter(blockToInsert, startBlock); |
| } |
| |
| appendBlockPlaceholder(blockToInsert); |
| setEndingSelection(VisibleSelection(Position(blockToInsert.get(), 0), DOWNSTREAM)); |
| if (shouldApplyStyleAfterInsertion) |
| applyStyleAfterInsertion(startBlock); |
| 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; |
| if (isFirstInBlock && !nestNewBlock) |
| refNode = startBlock; |
| else if (insertionPosition.node() == startBlock && nestNewBlock) { |
| refNode = startBlock->childNode(insertionPosition.deprecatedEditingOffset()); |
| ASSERT(refNode); // must be true or we'd be in the end of block case |
| } else |
| refNode = insertionPosition.node(); |
| |
| // find ending selection position easily before inserting the paragraph |
| insertionPosition = insertionPosition.downstream(); |
| |
| insertNodeBefore(blockToInsert, refNode); |
| appendBlockPlaceholder(blockToInsert.get()); |
| setEndingSelection(VisibleSelection(Position(blockToInsert.get(), 0), DOWNSTREAM)); |
| applyStyleAfterInsertion(startBlock); |
| setEndingSelection(VisibleSelection(insertionPosition, DOWNSTREAM)); |
| return; |
| } |
| |
| //--------------------------------------------------------------------- |
| // Handle the (more complicated) general case, |
| |
| // All of the content in the current block after visiblePos is |
| // about to be wrapped in a new paragraph element. Add a br before |
| // it if visiblePos is at the start of a paragraph so that the |
| // content will move down a line. |
| if (isStartOfParagraph(visiblePos)) { |
| RefPtr<Element> br = createBreakElement(document()); |
| insertNodeAt(br.get(), insertionPosition); |
| insertionPosition = positionAfterNode(br.get()); |
| } |
| |
| // 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 = VisiblePosition(insertionPosition).deepEquivalent(); |
| |
| // Build up list of ancestors in between the start node and the start block. |
| Vector<Element*> ancestors; |
| if (insertionPosition.node() != startBlock) { |
| for (Element* n = insertionPosition.node()->parentElement(); n && n != startBlock; n = n->parentElement()) |
| ancestors.append(n); |
| } |
| |
| // 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 = insertionPosition.leadingWhitespacePosition(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()) { |
| Text* textNode = static_cast<Text*>(leadingWhitespace.node()); |
| ASSERT(!textNode->renderer() || textNode->renderer()->style()->collapseWhiteSpace()); |
| replaceTextInNode(textNode, leadingWhitespace.deprecatedEditingOffset(), 1, nonBreakingSpaceString()); |
| } |
| |
| // Split at pos if in the middle of a text node. |
| if (insertionPosition.node()->isTextNode()) { |
| Text* textNode = static_cast<Text*>(insertionPosition.node()); |
| bool atEnd = (unsigned)insertionPosition.deprecatedEditingOffset() >= textNode->length(); |
| if (insertionPosition.deprecatedEditingOffset() > 0 && !atEnd) { |
| splitTextNode(textNode, insertionPosition.deprecatedEditingOffset()); |
| insertionPosition.moveToOffset(0); |
| visiblePos = VisiblePosition(insertionPosition); |
| splitText = true; |
| } |
| } |
| |
| // Put the added block in the tree. |
| if (nestNewBlock) |
| appendNode(blockToInsert.get(), startBlock); |
| else |
| insertNodeAfter(blockToInsert.get(), startBlock); |
| |
| updateLayout(); |
| |
| // Make clones of ancestors in between the start node and the start block. |
| RefPtr<Element> parent = blockToInsert; |
| for (size_t i = ancestors.size(); i != 0; --i) { |
| RefPtr<Element> child = ancestors[i - 1]->cloneElementWithoutChildren(); |
| appendNode(child, parent); |
| parent = child.release(); |
| } |
| |
| // If the paragraph separator was inserted at the end of a paragraph, an empty line must be |
| // created. All of the nodes, starting at visiblePos, are about to be added to the new paragraph |
| // element. If the first node to be inserted won't be one that will hold an empty line open, add a br. |
| if (isEndOfParagraph(visiblePos) && !lineBreakExistsAtVisiblePosition(visiblePos)) |
| appendNode(createBreakElement(document()).get(), blockToInsert.get()); |
| |
| // Move the start node and the siblings of the start node. |
| if (insertionPosition.node() != startBlock) { |
| Node* n = insertionPosition.node(); |
| if (insertionPosition.deprecatedEditingOffset() >= caretMaxOffset(n)) |
| n = n->nextSibling(); |
| |
| while (n && n != blockToInsert) { |
| Node *next = n->nextSibling(); |
| removeNode(n); |
| appendNode(n, parent.get()); |
| n = next; |
| } |
| } |
| |
| // Move everything after the start node. |
| if (!ancestors.isEmpty()) { |
| Element* leftParent = ancestors.first(); |
| while (leftParent && leftParent != startBlock) { |
| parent = parent->parentElement(); |
| if (!parent) |
| break; |
| Node* n = leftParent->nextSibling(); |
| while (n && n != blockToInsert) { |
| Node* next = n->nextSibling(); |
| removeNode(n); |
| appendNode(n, parent.get()); |
| n = next; |
| } |
| leftParent = leftParent->parentElement(); |
| } |
| } |
| |
| // Handle whitespace that occurs after the split |
| if (splitText) { |
| updateLayout(); |
| insertionPosition = Position(insertionPosition.node(), 0); |
| if (!insertionPosition.isRenderedCharacter()) { |
| // Clear out all whitespace and insert one non-breaking space |
| ASSERT(insertionPosition.node()->isTextNode()); |
| ASSERT(!insertionPosition.node()->renderer() || insertionPosition.node()->renderer()->style()->collapseWhiteSpace()); |
| deleteInsignificantTextDownstream(insertionPosition); |
| insertTextIntoNode(static_cast<Text*>(insertionPosition.node()), 0, nonBreakingSpaceString()); |
| } |
| } |
| |
| setEndingSelection(VisibleSelection(Position(blockToInsert.get(), 0), DOWNSTREAM)); |
| applyStyleAfterInsertion(startBlock); |
| } |
| |
| } // namespace WebCore |
