| /* |
| * 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 "Document.h" |
| #include "Logging.h" |
| #include "CSSComputedStyleDeclaration.h" |
| #include "CSSPropertyNames.h" |
| #include "Text.h" |
| #include "htmlediting.h" |
| #include "HTMLElement.h" |
| #include "HTMLNames.h" |
| #include "InsertLineBreakCommand.h" |
| #include "RenderObject.h" |
| #include "visible_units.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| InsertParagraphSeparatorCommand::InsertParagraphSeparatorCommand(Document *document, bool useDefaultParagraphElement) |
| : CompositeEditCommand(document) |
| , m_useDefaultParagraphElement(useDefaultParagraphElement) |
| { |
| } |
| |
| 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 = styleAtPosition(pos); |
| } |
| |
| void InsertParagraphSeparatorCommand::applyStyleAfterInsertion() |
| { |
| // FIXME: Improve typing style. |
| // See this bug: <rdar://problem/3769899> Implementation of typing style needs improvement |
| if (!m_style) |
| return; |
| |
| CSSComputedStyleDeclaration endingStyle(endingSelection().start().node()); |
| endingStyle.diff(m_style.get()); |
| if (m_style->length() > 0) |
| applyStyle(m_style.get()); |
| } |
| |
| void InsertParagraphSeparatorCommand::doApply() |
| { |
| bool splitText = false; |
| if (endingSelection().isNone()) |
| return; |
| |
| Position pos = endingSelection().start(); |
| |
| EAffinity affinity = endingSelection().affinity(); |
| |
| // Delete the current selection. |
| if (endingSelection().isRange()) { |
| calculateStyleBeforeInsertion(pos); |
| deleteSelection(false, true); |
| pos = endingSelection().start(); |
| affinity = endingSelection().affinity(); |
| } |
| |
| // FIXME: The rangeCompliantEquivalent conversion needs to be moved into enclosingBlock. |
| Node* startBlock = enclosingBlock(rangeCompliantEquivalent(pos).node()); |
| Position canonicalPos = VisiblePosition(pos).deepEquivalent(); |
| if (!startBlock || !startBlock->parentNode() || |
| isTableCell(startBlock) || |
| startBlock->hasTagName(formTag) || |
| canonicalPos.node()->renderer() && canonicalPos.node()->renderer()->isTable() || |
| canonicalPos.node()->hasTagName(hrTag)) { |
| applyCommandToComposite(new InsertLineBreakCommand(document())); |
| return; |
| } |
| |
| // Use the leftmost candidate. |
| pos = pos.upstream(); |
| if (!pos.isCandidate()) |
| pos = pos.downstream(); |
| |
| // Adjust the insertion position after the delete |
| pos = positionAvoidingSpecialElementBoundary(pos); |
| VisiblePosition visiblePos(pos, affinity); |
| calculateStyleBeforeInsertion(pos); |
| |
| //--------------------------------------------------------------------- |
| // Handle special case of typing return on an empty list item |
| if (breakOutOfEmptyListItem()) |
| return; |
| |
| //--------------------------------------------------------------------- |
| // Prepare for more general cases. |
| // FIXME: We shouldn't peel off the node here because then we lose track of |
| // the fact that it's the node that belongs to an editing position and |
| // not a rangeCompliantEquivalent. |
| Node *startNode = pos.node(); |
| |
| bool isFirstInBlock = isStartOfBlock(visiblePos); |
| bool isLastInBlock = isEndOfBlock(visiblePos); |
| bool nestNewBlock = false; |
| |
| // Create block to be inserted. |
| RefPtr<Node> blockToInsert; |
| if (startBlock == startBlock->rootEditableElement()) { |
| blockToInsert = static_pointer_cast<Node>(createDefaultParagraphElement(document())); |
| nestNewBlock = true; |
| } else if (m_useDefaultParagraphElement) |
| blockToInsert = static_pointer_cast<Node>(createDefaultParagraphElement(document())); |
| else |
| blockToInsert = startBlock->cloneNode(false); |
| |
| //--------------------------------------------------------------------- |
| // 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 && !lineBreakExistsAtPosition(visiblePos)) { |
| // The block is empty. Create an empty block to |
| // represent the paragraph that we're leaving. |
| RefPtr<Node> extraBlock = createDefaultParagraphElement(document()); |
| appendNode(extraBlock.get(), startBlock); |
| appendBlockPlaceholder(extraBlock.get()); |
| } |
| appendNode(blockToInsert.get(), startBlock); |
| } else |
| insertNodeAfter(blockToInsert.get(), startBlock); |
| |
| appendBlockPlaceholder(blockToInsert.get()); |
| setEndingSelection(Selection(Position(blockToInsert.get(), 0), DOWNSTREAM)); |
| applyStyleAfterInsertion(); |
| 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 (pos.node() == startBlock && nestNewBlock) { |
| refNode = startBlock->childNode(pos.offset()); |
| ASSERT(refNode); // must be true or we'd be in the end of block case |
| } else |
| refNode = pos.node(); |
| |
| // find ending selection position easily before inserting the paragraph |
| pos = pos.downstream(); |
| |
| insertNodeBefore(blockToInsert.get(), refNode); |
| appendBlockPlaceholder(blockToInsert.get()); |
| setEndingSelection(Selection(Position(blockToInsert.get(), 0), DOWNSTREAM)); |
| applyStyleAfterInsertion(); |
| setEndingSelection(Selection(pos, 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(), pos); |
| pos = positionAfterNode(br.get()); |
| } |
| |
| // Move downstream. Typing style code will take care of carrying along the |
| // style of the upstream position. |
| pos = pos.downstream(); |
| startNode = pos.node(); |
| |
| // Build up list of ancestors in between the start node and the start block. |
| Vector<Node*> ancestors; |
| if (startNode != startBlock) |
| for (Node* n = startNode->parentNode(); n && n != startBlock; n = n->parentNode()) |
| 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 = pos.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.offset(), 1, nonBreakingSpaceString()); |
| } |
| |
| // Split at pos if in the middle of a text node. |
| if (startNode->isTextNode()) { |
| Text *textNode = static_cast<Text *>(startNode); |
| bool atEnd = (unsigned)pos.offset() >= textNode->length(); |
| if (pos.offset() > 0 && !atEnd) { |
| splitTextNode(textNode, pos.offset()); |
| pos = Position(startNode, 0); |
| visiblePos = VisiblePosition(pos); |
| 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<Node> parent = blockToInsert; |
| for (size_t i = ancestors.size(); i != 0; --i) { |
| RefPtr<Node> child = ancestors[i - 1]->cloneNode(false); // shallow clone |
| appendNode(child.get(), parent.get()); |
| 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) && !lineBreakExistsAtPosition(visiblePos)) |
| appendNode(createBreakElement(document()).get(), blockToInsert.get()); |
| |
| // Move the start node and the siblings of the start node. |
| if (startNode != startBlock) { |
| Node *n = startNode; |
| if (pos.offset() >= caretMaxOffset(startNode)) |
| n = startNode->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()) { |
| Node* leftParent = ancestors.first(); |
| while (leftParent && leftParent != startBlock) { |
| parent = parent->parentNode(); |
| Node* n = leftParent->nextSibling(); |
| while (n && n != blockToInsert) { |
| Node* next = n->nextSibling(); |
| removeNode(n); |
| appendNode(n, parent.get()); |
| n = next; |
| } |
| leftParent = leftParent->parentNode(); |
| } |
| } |
| |
| // Handle whitespace that occurs after the split |
| if (splitText) { |
| updateLayout(); |
| pos = Position(startNode, 0); |
| if (!pos.isRenderedCharacter()) { |
| // Clear out all whitespace and insert one non-breaking space |
| ASSERT(startNode); |
| ASSERT(startNode->isTextNode()); |
| ASSERT(!startNode->renderer() || startNode->renderer()->style()->collapseWhiteSpace()); |
| deleteInsignificantTextDownstream(pos); |
| insertTextIntoNode(static_cast<Text*>(startNode), 0, nonBreakingSpaceString()); |
| } |
| } |
| |
| setEndingSelection(Selection(Position(blockToInsert.get(), 0), DOWNSTREAM)); |
| applyStyleAfterInsertion(); |
| } |
| |
| } // namespace WebCore |
