| /* |
| * Copyright (C) 2005 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 "DeleteSelectionCommand.h" |
| |
| #include "Document.h" |
| #include "DocumentFragment.h" |
| #include "Editor.h" |
| #include "EditorClient.h" |
| #include "Element.h" |
| #include "Frame.h" |
| #include "Logging.h" |
| #include "CSSComputedStyleDeclaration.h" |
| #include "htmlediting.h" |
| #include "HTMLInputElement.h" |
| #include "HTMLNames.h" |
| #include "markup.h" |
| #include "ReplaceSelectionCommand.h" |
| #include "Text.h" |
| #include "TextIterator.h" |
| #include "visible_units.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| static bool isTableRow(const Node* node) |
| { |
| return node && node->hasTagName(trTag); |
| } |
| |
| static bool isTableCellEmpty(Node* cell) |
| { |
| ASSERT(isTableCell(cell)); |
| VisiblePosition firstInCell(Position(cell, 0)); |
| VisiblePosition lastInCell(Position(cell, maxDeepOffset(cell))); |
| return firstInCell == lastInCell; |
| } |
| |
| static bool isTableRowEmpty(Node* row) |
| { |
| if (!isTableRow(row)) |
| return false; |
| |
| for (Node* child = row->firstChild(); child; child = child->nextSibling()) |
| if (isTableCell(child) && !isTableCellEmpty(child)) |
| return false; |
| |
| return true; |
| } |
| |
| DeleteSelectionCommand::DeleteSelectionCommand(Document *document, bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements) |
| : CompositeEditCommand(document), |
| m_hasSelectionToDelete(false), |
| m_smartDelete(smartDelete), |
| m_mergeBlocksAfterDelete(mergeBlocksAfterDelete), |
| m_replace(replace), |
| m_expandForSpecialElements(expandForSpecialElements), |
| m_startBlock(0), |
| m_endBlock(0), |
| m_typingStyle(0), |
| m_deleteIntoBlockquoteStyle(0) |
| { |
| } |
| |
| DeleteSelectionCommand::DeleteSelectionCommand(const Selection& selection, bool smartDelete, bool mergeBlocksAfterDelete, bool replace, bool expandForSpecialElements) |
| : CompositeEditCommand(selection.start().node()->document()), |
| m_hasSelectionToDelete(true), |
| m_smartDelete(smartDelete), |
| m_mergeBlocksAfterDelete(mergeBlocksAfterDelete), |
| m_replace(replace), |
| m_expandForSpecialElements(expandForSpecialElements), |
| m_selectionToDelete(selection), |
| m_startBlock(0), |
| m_endBlock(0), |
| m_typingStyle(0), |
| m_deleteIntoBlockquoteStyle(0) |
| { |
| } |
| |
| void DeleteSelectionCommand::initializeStartEnd(Position& start, Position& end) |
| { |
| Node* startSpecialContainer = 0; |
| Node* endSpecialContainer = 0; |
| |
| start = m_selectionToDelete.start(); |
| end = m_selectionToDelete.end(); |
| |
| // For HRs, we'll get a position at (HR,1) when hitting delete from the beginning of the previous line, or (HR,0) when forward deleting, |
| // but in these cases, we want to delete it, so manually expand the selection |
| if (start.node()->hasTagName(hrTag)) |
| start = Position(start.node(), 0); |
| else if (end.node()->hasTagName(hrTag)) |
| end = Position(end.node(), 1); |
| |
| // FIXME: This is only used so that moveParagraphs can avoid the bugs in special element expanion. |
| if (!m_expandForSpecialElements) |
| return; |
| |
| while (1) { |
| startSpecialContainer = 0; |
| endSpecialContainer = 0; |
| |
| Position s = positionBeforeContainingSpecialElement(start, &startSpecialContainer); |
| Position e = positionAfterContainingSpecialElement(end, &endSpecialContainer); |
| |
| if (!startSpecialContainer && !endSpecialContainer) |
| break; |
| |
| if (VisiblePosition(start) != m_selectionToDelete.visibleStart() || VisiblePosition(end) != m_selectionToDelete.visibleEnd()) |
| break; |
| |
| // If we're going to expand to include the startSpecialContainer, it must be fully selected. |
| if (startSpecialContainer && !endSpecialContainer && Range::compareBoundaryPoints(positionAfterNode(startSpecialContainer), end) > -1) |
| break; |
| |
| // If we're going to expand to include the endSpecialContainer, it must be fully selected. |
| if (endSpecialContainer && !startSpecialContainer && Range::compareBoundaryPoints(start, positionBeforeNode(endSpecialContainer)) > -1) |
| break; |
| |
| if (startSpecialContainer && startSpecialContainer->isDescendantOf(endSpecialContainer)) |
| // Don't adjust the end yet, it is the end of a special element that contains the start |
| // special element (which may or may not be fully selected). |
| start = s; |
| else if (endSpecialContainer && endSpecialContainer->isDescendantOf(startSpecialContainer)) |
| // Don't adjust the start yet, it is the start of a special element that contains the end |
| // special element (which may or may not be fully selected). |
| end = e; |
| else { |
| start = s; |
| end = e; |
| } |
| } |
| } |
| |
| void DeleteSelectionCommand::initializePositionData() |
| { |
| Position start, end; |
| initializeStartEnd(start, end); |
| |
| m_upstreamStart = start.upstream(); |
| m_downstreamStart = start.downstream(); |
| m_upstreamEnd = end.upstream(); |
| m_downstreamEnd = end.downstream(); |
| |
| m_startRoot = editableRootForPosition(start); |
| m_endRoot = editableRootForPosition(end); |
| |
| m_startTableRow = enclosingNodeOfType(start, &isTableRow); |
| m_endTableRow = enclosingNodeOfType(end, &isTableRow); |
| |
| // Don't move content out of a table cell. |
| // If the cell is non-editable, enclosingNodeOfType won't return it by default, so |
| // tell that function that we don't care if it returns non-editable nodes. |
| Node* startCell = enclosingNodeOfType(m_upstreamStart, &isTableCell, false); |
| Node* endCell = enclosingNodeOfType(m_downstreamEnd, &isTableCell, false); |
| // FIXME: This isn't right. A borderless table with two rows and a single column would appear as two paragraphs. |
| if (endCell && endCell != startCell) |
| m_mergeBlocksAfterDelete = false; |
| |
| // Usually the start and the end of the selection to delete are pulled together as a result of the deletion. |
| // Sometimes they aren't (like when no merge is requested), so we must choose one position to hold the caret |
| // and receive the placeholder after deletion. |
| VisiblePosition visibleEnd(m_downstreamEnd); |
| if (m_mergeBlocksAfterDelete && !isEndOfParagraph(visibleEnd)) |
| m_endingPosition = m_downstreamEnd; |
| else |
| m_endingPosition = m_downstreamStart; |
| |
| // Handle leading and trailing whitespace, as well as smart delete adjustments to the selection |
| m_leadingWhitespace = m_upstreamStart.leadingWhitespacePosition(m_selectionToDelete.affinity()); |
| m_trailingWhitespace = m_downstreamEnd.trailingWhitespacePosition(VP_DEFAULT_AFFINITY); |
| |
| if (m_smartDelete) { |
| |
| // skip smart delete if the selection to delete already starts or ends with whitespace |
| Position pos = VisiblePosition(m_upstreamStart, m_selectionToDelete.affinity()).deepEquivalent(); |
| bool skipSmartDelete = pos.trailingWhitespacePosition(VP_DEFAULT_AFFINITY, true).isNotNull(); |
| if (!skipSmartDelete) |
| skipSmartDelete = m_downstreamEnd.leadingWhitespacePosition(VP_DEFAULT_AFFINITY, true).isNotNull(); |
| |
| // extend selection upstream if there is whitespace there |
| bool hasLeadingWhitespaceBeforeAdjustment = m_upstreamStart.leadingWhitespacePosition(m_selectionToDelete.affinity(), true).isNotNull(); |
| if (!skipSmartDelete && hasLeadingWhitespaceBeforeAdjustment) { |
| VisiblePosition visiblePos = VisiblePosition(m_upstreamStart, VP_DEFAULT_AFFINITY).previous(); |
| pos = visiblePos.deepEquivalent(); |
| // Expand out one character upstream for smart delete and recalculate |
| // positions based on this change. |
| m_upstreamStart = pos.upstream(); |
| m_downstreamStart = pos.downstream(); |
| m_leadingWhitespace = m_upstreamStart.leadingWhitespacePosition(visiblePos.affinity()); |
| } |
| |
| // trailing whitespace is only considered for smart delete if there is no leading |
| // whitespace, as in the case where you double-click the first word of a paragraph. |
| if (!skipSmartDelete && !hasLeadingWhitespaceBeforeAdjustment && m_downstreamEnd.trailingWhitespacePosition(VP_DEFAULT_AFFINITY, true).isNotNull()) { |
| // Expand out one character downstream for smart delete and recalculate |
| // positions based on this change. |
| pos = VisiblePosition(m_downstreamEnd, VP_DEFAULT_AFFINITY).next().deepEquivalent(); |
| m_upstreamEnd = pos.upstream(); |
| m_downstreamEnd = pos.downstream(); |
| m_trailingWhitespace = m_downstreamEnd.trailingWhitespacePosition(VP_DEFAULT_AFFINITY); |
| } |
| } |
| |
| // We must pass the positions through rangeCompliantEquivalent, since some editing positions |
| // that appear inside their nodes aren't really inside them. [hr, 0] is one example. |
| // FIXME: rangeComplaintEquivalent should eventually be moved into enclosing element getters |
| // like the one below, since editing functions should obviously accept editing positions. |
| // FIXME: Passing false to enclosingNodeOfType tells it that it's OK to return a non-editable |
| // node. This was done to match existing behavior, but it seems wrong. |
| m_startBlock = enclosingNodeOfType(rangeCompliantEquivalent(m_downstreamStart), &isBlock, false); |
| m_endBlock = enclosingNodeOfType(rangeCompliantEquivalent(m_upstreamEnd), &isBlock, false); |
| } |
| |
| void DeleteSelectionCommand::saveTypingStyleState() |
| { |
| // A common case is deleting characters that are all from the same text node. In |
| // that case, the style at the start of the selection before deletion will be the |
| // same as the style at the start of the selection after deletion (since those |
| // two positions will be identical). Therefore there is no need to save the |
| // typing style at the start of the selection, nor is there a reason to |
| // compute the style at the start of the selection after deletion (see the |
| // early return in calculateTypingStyleAfterDelete). |
| if (m_upstreamStart.node() == m_downstreamEnd.node() && m_upstreamStart.node()->isTextNode()) |
| return; |
| |
| // Figure out the typing style in effect before the delete is done. |
| RefPtr<CSSComputedStyleDeclaration> computedStyle = positionBeforeTabSpan(m_selectionToDelete.start()).computedStyle(); |
| m_typingStyle = computedStyle->copyInheritableProperties(); |
| |
| // If we're deleting into a Mail blockquote, save the style at end() instead of start() |
| // We'll use this later in computeTypingStyleAfterDelete if we end up outside of a Mail blockquote |
| if (nearestMailBlockquote(m_selectionToDelete.start().node())) { |
| computedStyle = m_selectionToDelete.end().computedStyle(); |
| m_deleteIntoBlockquoteStyle = computedStyle->copyInheritableProperties(); |
| } else |
| m_deleteIntoBlockquoteStyle = 0; |
| } |
| |
| bool DeleteSelectionCommand::handleSpecialCaseBRDelete() |
| { |
| // Check for special-case where the selection contains only a BR on a line by itself after another BR. |
| bool upstreamStartIsBR = m_upstreamStart.node()->hasTagName(brTag); |
| bool downstreamStartIsBR = m_downstreamStart.node()->hasTagName(brTag); |
| bool isBROnLineByItself = upstreamStartIsBR && downstreamStartIsBR && m_downstreamStart.node() == m_upstreamEnd.node(); |
| if (isBROnLineByItself) { |
| removeNode(m_downstreamStart.node()); |
| return true; |
| } |
| |
| // Not a special-case delete per se, but we can detect that the merging of content between blocks |
| // should not be done. |
| if (upstreamStartIsBR && downstreamStartIsBR) { |
| m_mergeBlocksAfterDelete = false; |
| m_endingPosition = m_downstreamEnd; |
| } |
| |
| return false; |
| } |
| |
| static void updatePositionForNodeRemoval(Node* node, Position& position) |
| { |
| if (position.isNull()) |
| return; |
| if (node->parent() == position.node() && node->nodeIndex() < (unsigned)position.offset()) |
| position = Position(position.node(), position.offset() - 1); |
| if (position.node() == node || position.node()->isDescendantOf(node)) |
| position = positionBeforeNode(node); |
| } |
| |
| void DeleteSelectionCommand::removeNode(Node *node) |
| { |
| if (!node) |
| return; |
| |
| if (m_startRoot != m_endRoot && !(node->isDescendantOf(m_startRoot.get()) && node->isDescendantOf(m_endRoot.get()))) { |
| // If a node is not in both the start and end editable roots, remove it only if its inside an editable region. |
| if (!node->parentNode()->isContentEditable()) { |
| // Don't remove non-editable atomic nodes. |
| if (!node->firstChild()) |
| return; |
| // Search this non-editable region for editable regions to empty. |
| RefPtr<Node> child = node->firstChild(); |
| while (child) { |
| RefPtr<Node> nextChild = child->nextSibling(); |
| removeNode(child.get()); |
| // Bail if nextChild is no longer node's child. |
| if (nextChild && nextChild->parentNode() != node) |
| return; |
| child = nextChild; |
| } |
| |
| // Don't remove editable regions that are inside non-editable ones, just clear them. |
| return; |
| } |
| } |
| |
| if (isTableStructureNode(node) || node == node->rootEditableElement()) { |
| // Do not remove an element of table structure; remove its contents. |
| // Likewise for the root editable element. |
| Node *child = node->firstChild(); |
| while (child) { |
| Node *remove = child; |
| child = child->nextSibling(); |
| removeNode(remove); |
| } |
| |
| // make sure empty cell has some height |
| updateLayout(); |
| RenderObject *r = node->renderer(); |
| if (r && r->isTableCell() && r->contentHeight() <= 0) |
| insertBlockPlaceholder(Position(node,0)); |
| return; |
| } |
| |
| if (node == m_startBlock && !isEndOfBlock(VisiblePosition(m_startBlock.get(), 0, DOWNSTREAM).previous())) |
| m_needPlaceholder = true; |
| else if (node == m_endBlock && !isStartOfBlock(VisiblePosition(m_endBlock.get(), maxDeepOffset(m_endBlock.get()), DOWNSTREAM).next())) |
| m_needPlaceholder = true; |
| |
| // FIXME: Update the endpoints of the range being deleted. |
| updatePositionForNodeRemoval(node, m_endingPosition); |
| updatePositionForNodeRemoval(node, m_leadingWhitespace); |
| updatePositionForNodeRemoval(node, m_trailingWhitespace); |
| |
| CompositeEditCommand::removeNode(node); |
| } |
| |
| |
| void updatePositionForTextRemoval(Node* node, int offset, int count, Position& position) |
| { |
| if (position.node() == node) { |
| if (position.offset() > offset + count) |
| position = Position(position.node(), position.offset() - count); |
| else if (position.offset() > offset) |
| position = Position(position.node(), offset); |
| } |
| } |
| |
| void DeleteSelectionCommand::deleteTextFromNode(Text *node, int offset, int count) |
| { |
| // FIXME: Update the endpoints of the range being deleted. |
| updatePositionForTextRemoval(node, offset, count, m_endingPosition); |
| updatePositionForTextRemoval(node, offset, count, m_leadingWhitespace); |
| updatePositionForTextRemoval(node, offset, count, m_trailingWhitespace); |
| |
| CompositeEditCommand::deleteTextFromNode(node, offset, count); |
| } |
| |
| void DeleteSelectionCommand::handleGeneralDelete() |
| { |
| int startOffset = m_upstreamStart.offset(); |
| Node* startNode = m_upstreamStart.node(); |
| |
| // Never remove the start block unless it's a table, in which case we won't merge content in. |
| if (startNode == m_startBlock && startOffset == 0 && canHaveChildrenForEditing(startNode) && !startNode->hasTagName(tableTag)) { |
| startOffset = 0; |
| startNode = startNode->traverseNextNode(); |
| } |
| |
| if (startOffset >= caretMaxOffset(startNode) && startNode->isTextNode()) { |
| Text *text = static_cast<Text *>(startNode); |
| if (text->length() > (unsigned)caretMaxOffset(startNode)) |
| deleteTextFromNode(text, caretMaxOffset(startNode), text->length() - caretMaxOffset(startNode)); |
| } |
| |
| if (startOffset >= maxDeepOffset(startNode)) { |
| startNode = startNode->traverseNextSibling(); |
| startOffset = 0; |
| } |
| |
| // Done adjusting the start. See if we're all done. |
| if (!startNode) |
| return; |
| |
| if (startNode == m_downstreamEnd.node()) { |
| // The selection to delete is all in one node. |
| if (!startNode->renderer() || |
| (startOffset == 0 && m_downstreamEnd.offset() >= maxDeepOffset(startNode))) { |
| // just delete |
| removeNode(startNode); |
| } else if (m_downstreamEnd.offset() - startOffset > 0) { |
| if (startNode->isTextNode()) { |
| // in a text node that needs to be trimmed |
| Text *text = static_cast<Text *>(startNode); |
| deleteTextFromNode(text, startOffset, m_downstreamEnd.offset() - startOffset); |
| } else { |
| removeChildrenInRange(startNode, startOffset, m_downstreamEnd.offset()); |
| m_endingPosition = m_upstreamStart; |
| } |
| } |
| } |
| else { |
| bool startNodeWasDescendantOfEndNode = m_upstreamStart.node()->isDescendantOf(m_downstreamEnd.node()); |
| // The selection to delete spans more than one node. |
| RefPtr<Node> node(startNode); |
| |
| if (startOffset > 0) { |
| if (startNode->isTextNode()) { |
| // in a text node that needs to be trimmed |
| Text *text = static_cast<Text *>(node.get()); |
| deleteTextFromNode(text, startOffset, text->length() - startOffset); |
| node = node->traverseNextNode(); |
| } else { |
| node = startNode->childNode(startOffset); |
| } |
| } |
| |
| // handle deleting all nodes that are completely selected |
| while (node && node != m_downstreamEnd.node()) { |
| if (Range::compareBoundaryPoints(Position(node.get(), 0), m_downstreamEnd) >= 0) { |
| // traverseNextSibling just blew past the end position, so stop deleting |
| node = 0; |
| } else if (!m_downstreamEnd.node()->isDescendantOf(node.get())) { |
| RefPtr<Node> nextNode = node->traverseNextSibling(); |
| // if we just removed a node from the end container, update end position so the |
| // check above will work |
| if (node->parentNode() == m_downstreamEnd.node()) { |
| ASSERT(node->nodeIndex() < (unsigned)m_downstreamEnd.offset()); |
| m_downstreamEnd = Position(m_downstreamEnd.node(), m_downstreamEnd.offset() - 1); |
| } |
| removeNode(node.get()); |
| node = nextNode.get(); |
| } else { |
| Node* n = node->lastDescendant(); |
| if (m_downstreamEnd.node() == n && m_downstreamEnd.offset() >= caretMaxOffset(n)) { |
| removeNode(node.get()); |
| node = 0; |
| } else |
| node = node->traverseNextNode(); |
| } |
| } |
| |
| if (m_downstreamEnd.node() != startNode && !m_upstreamStart.node()->isDescendantOf(m_downstreamEnd.node()) && m_downstreamEnd.node()->inDocument() && m_downstreamEnd.offset() >= caretMinOffset(m_downstreamEnd.node())) { |
| if (m_downstreamEnd.offset() >= maxDeepOffset(m_downstreamEnd.node()) && !canHaveChildrenForEditing(m_downstreamEnd.node())) { |
| // The node itself is fully selected, not just its contents. Delete it. |
| removeNode(m_downstreamEnd.node()); |
| } else { |
| if (m_downstreamEnd.node()->isTextNode()) { |
| // in a text node that needs to be trimmed |
| Text *text = static_cast<Text *>(m_downstreamEnd.node()); |
| if (m_downstreamEnd.offset() > 0) { |
| deleteTextFromNode(text, 0, m_downstreamEnd.offset()); |
| m_downstreamEnd = Position(text, 0); |
| } |
| // Remove children of m_downstreamEnd.node() that come after m_upstreamStart. |
| // Don't try to remove children if m_upstreamStart was inside m_downstreamEnd.node() |
| // and m_upstreamStart has been removed from the document, because then we don't |
| // know how many children to remove. |
| // FIXME: Make m_upstreamStart a position we update as we remove content, then we can |
| // always know which children to remove. |
| } else if (!(startNodeWasDescendantOfEndNode && !m_upstreamStart.node()->inDocument())) { |
| int offset = 0; |
| if (m_upstreamStart.node()->isDescendantOf(m_downstreamEnd.node())) { |
| Node *n = m_upstreamStart.node(); |
| while (n && n->parentNode() != m_downstreamEnd.node()) |
| n = n->parentNode(); |
| if (n) |
| offset = n->nodeIndex() + 1; |
| } |
| removeChildrenInRange(m_downstreamEnd.node(), offset, m_downstreamEnd.offset()); |
| m_downstreamEnd = Position(m_downstreamEnd.node(), offset); |
| } |
| } |
| } |
| } |
| } |
| |
| void DeleteSelectionCommand::fixupWhitespace() |
| { |
| updateLayout(); |
| // FIXME: isRenderedCharacter should be removed, and we should use VisiblePosition::characterAfter and VisiblePosition::characterBefore |
| if (m_leadingWhitespace.isNotNull() && !m_leadingWhitespace.isRenderedCharacter()) { |
| Text* textNode = static_cast<Text*>(m_leadingWhitespace.node()); |
| ASSERT(!textNode->renderer() || textNode->renderer()->style()->collapseWhiteSpace()); |
| replaceTextInNode(textNode, m_leadingWhitespace.offset(), 1, nonBreakingSpaceString()); |
| } |
| if (m_trailingWhitespace.isNotNull() && !m_trailingWhitespace.isRenderedCharacter()) { |
| Text* textNode = static_cast<Text*>(m_trailingWhitespace.node()); |
| ASSERT(!textNode->renderer() ||textNode->renderer()->style()->collapseWhiteSpace()); |
| replaceTextInNode(textNode, m_trailingWhitespace.offset(), 1, nonBreakingSpaceString()); |
| } |
| } |
| |
| // If a selection starts in one block and ends in another, we have to merge to bring content before the |
| // start together with content after the end. |
| void DeleteSelectionCommand::mergeParagraphs() |
| { |
| if (!m_mergeBlocksAfterDelete) |
| return; |
| |
| // FIXME: Deletion should adjust selection endpoints as it removes nodes so that we never get into this state (4099839). |
| if (!m_downstreamEnd.node()->inDocument() || !m_upstreamStart.node()->inDocument()) |
| return; |
| |
| // FIXME: The deletion algorithm shouldn't let this happen. |
| if (Range::compareBoundaryPoints(m_upstreamStart, m_downstreamEnd) > 0) |
| return; |
| |
| // FIXME: Merging will always be unnecessary in this case, but we really bail here because this is a case where |
| // deletion commonly fails to adjust its endpoints, which would cause the visible position comparison below to false negative. |
| if (m_endBlock == m_startBlock) |
| return; |
| |
| VisiblePosition startOfParagraphToMove(m_downstreamEnd); |
| VisiblePosition mergeDestination(m_upstreamStart); |
| |
| // m_downstreamEnd's block has been emptied out by deletion. There is no content inside of it to |
| // move, so just remove it. |
| Element* endBlock = static_cast<Element*>(enclosingBlock(m_downstreamEnd.node())); |
| if (!startOfParagraphToMove.deepEquivalent().node() || !endBlock->contains(startOfParagraphToMove.deepEquivalent().node())) { |
| removeNode(enclosingBlock(m_downstreamEnd.node())); |
| return; |
| } |
| |
| // We need to merge into m_upstreamStart's block, but it's been emptied out and collapsed by deletion. |
| if (!mergeDestination.deepEquivalent().node() || !mergeDestination.deepEquivalent().node()->isDescendantOf(m_upstreamStart.node()->enclosingBlockFlowElement())) { |
| insertNodeAt(createBreakElement(document()).get(), m_upstreamStart); |
| mergeDestination = VisiblePosition(m_upstreamStart); |
| } |
| |
| if (mergeDestination == startOfParagraphToMove) |
| return; |
| |
| VisiblePosition endOfParagraphToMove = endOfParagraph(startOfParagraphToMove); |
| |
| if (mergeDestination == endOfParagraphToMove) |
| return; |
| |
| // The rule for merging into an empty block is: only do so if its farther to the right. |
| // FIXME: Consider RTL. |
| // FIXME: handleSpecialCaseBRDelete prevents us from getting here in a case like <ul><li>foo<br><br></li></ul>^foo |
| if (isStartOfParagraph(mergeDestination) && startOfParagraphToMove.caretRect().x() > mergeDestination.caretRect().x()) { |
| ASSERT(mergeDestination.deepEquivalent().downstream().node()->hasTagName(brTag)); |
| removeNodeAndPruneAncestors(mergeDestination.deepEquivalent().downstream().node()); |
| m_endingPosition = startOfParagraphToMove.deepEquivalent(); |
| return; |
| } |
| |
| RefPtr<Range> range = Range::create(document(), rangeCompliantEquivalent(startOfParagraphToMove.deepEquivalent()), rangeCompliantEquivalent(endOfParagraphToMove.deepEquivalent())); |
| RefPtr<Range> rangeToBeReplaced = Range::create(document(), rangeCompliantEquivalent(mergeDestination.deepEquivalent()), rangeCompliantEquivalent(mergeDestination.deepEquivalent())); |
| if (!document()->frame()->editor()->client()->shouldMoveRangeAfterDelete(range.get(), rangeToBeReplaced.get())) |
| return; |
| |
| // moveParagraphs will insert placeholders if it removes blocks that would require their use, don't let block |
| // removals that it does cause the insertion of *another* placeholder. |
| bool needPlaceholder = m_needPlaceholder; |
| moveParagraph(startOfParagraphToMove, endOfParagraphToMove, mergeDestination); |
| m_needPlaceholder = needPlaceholder; |
| // The endingPosition was likely clobbered by the move, so recompute it (moveParagraph selects the moved paragraph). |
| m_endingPosition = endingSelection().start(); |
| } |
| |
| void DeleteSelectionCommand::removePreviouslySelectedEmptyTableRows() |
| { |
| if (m_endTableRow && m_endTableRow->inDocument() && m_endTableRow != m_startTableRow) { |
| Node* row = m_endTableRow->previousSibling(); |
| while (row && row != m_startTableRow) { |
| RefPtr<Node> previousRow = row->previousSibling(); |
| if (isTableRowEmpty(row)) |
| // Use a raw removeNode, instead of DeleteSelectionCommand's, because |
| // that won't remove rows, it only empties them in preparation for this function. |
| CompositeEditCommand::removeNode(row); |
| row = previousRow.get(); |
| } |
| } |
| |
| // Remove empty rows after the start row. |
| if (m_startTableRow && m_startTableRow->inDocument() && m_startTableRow != m_endTableRow) { |
| Node* row = m_startTableRow->nextSibling(); |
| while (row && row != m_endTableRow) { |
| RefPtr<Node> nextRow = row->nextSibling(); |
| if (isTableRowEmpty(row)) |
| CompositeEditCommand::removeNode(row); |
| row = nextRow.get(); |
| } |
| } |
| |
| if (m_endTableRow && m_endTableRow->inDocument() && m_endTableRow != m_startTableRow) |
| if (isTableRowEmpty(m_endTableRow.get())) { |
| // Don't remove m_endTableRow if it's where we're putting the ending selection. |
| if (!m_endingPosition.node()->isDescendantOf(m_endTableRow.get())) { |
| // FIXME: We probably shouldn't remove m_endTableRow unless it's fully selected, even if it is empty. |
| // We'll need to start adjusting the selection endpoints during deletion to know whether or not m_endTableRow |
| // was fully selected here. |
| CompositeEditCommand::removeNode(m_endTableRow.get()); |
| } |
| } |
| } |
| |
| void DeleteSelectionCommand::calculateTypingStyleAfterDelete() |
| { |
| if (!m_typingStyle) |
| return; |
| |
| // Compute the difference between the style before the delete and the style now |
| // after the delete has been done. Set this style on the frame, so other editing |
| // commands being composed with this one will work, and also cache it on the command, |
| // so the Frame::appliedEditing can set it after the whole composite command |
| // has completed. |
| |
| // If we deleted into a blockquote, but are now no longer in a blockquote, use the alternate typing style |
| if (m_deleteIntoBlockquoteStyle && !nearestMailBlockquote(m_endingPosition.node())) |
| m_typingStyle = m_deleteIntoBlockquoteStyle; |
| m_deleteIntoBlockquoteStyle = 0; |
| |
| RefPtr<CSSComputedStyleDeclaration> endingStyle = computedStyle(m_endingPosition.node()); |
| endingStyle->diff(m_typingStyle.get()); |
| if (!m_typingStyle->length()) |
| m_typingStyle = 0; |
| VisiblePosition visibleEnd(m_endingPosition); |
| if (m_typingStyle && |
| isStartOfParagraph(visibleEnd) && |
| isEndOfParagraph(visibleEnd) && |
| lineBreakExistsAtPosition(visibleEnd)) { |
| // Apply style to the placeholder that is now holding open the empty paragraph. |
| // This makes sure that the paragraph has the right height, and that the paragraph |
| // takes on the right style and retains it even if you move the selection away and |
| // then move it back (which will clear typing style). |
| |
| setEndingSelection(visibleEnd); |
| applyStyle(m_typingStyle.get(), EditActionUnspecified); |
| // applyStyle can destroy the placeholder that was at m_endingPosition if it needs to |
| // move it, but it will set an endingSelection() at [movedPlaceholder, 0] if it does so. |
| m_endingPosition = endingSelection().start(); |
| m_typingStyle = 0; |
| } |
| // This is where we've deleted all traces of a style but not a whole paragraph (that's handled above). |
| // In this case if we start typing, the new characters should have the same style as the just deleted ones, |
| // but, if we change the selection, come back and start typing that style should be lost. Also see |
| // preserveTypingStyle() below. |
| document()->frame()->setTypingStyle(m_typingStyle.get()); |
| } |
| |
| void DeleteSelectionCommand::clearTransientState() |
| { |
| m_selectionToDelete = Selection(); |
| m_upstreamStart.clear(); |
| m_downstreamStart.clear(); |
| m_upstreamEnd.clear(); |
| m_downstreamEnd.clear(); |
| m_endingPosition.clear(); |
| m_leadingWhitespace.clear(); |
| m_trailingWhitespace.clear(); |
| } |
| |
| void DeleteSelectionCommand::saveFullySelectedAnchor() |
| { |
| // If deleting an anchor element, save it away so that it can be restored |
| // when the user begins entering text. |
| |
| Position start = m_selectionToDelete.start(); |
| Node* startAnchor = enclosingNodeWithTag(start.downstream(), aTag); |
| if (!startAnchor) |
| return; |
| |
| Position end = m_selectionToDelete.end(); |
| Node* endAnchor = enclosingNodeWithTag(end.upstream(), aTag); |
| if (startAnchor != endAnchor) |
| return; |
| |
| VisiblePosition visibleStart(m_selectionToDelete.visibleStart()); |
| VisiblePosition visibleEnd(m_selectionToDelete.visibleEnd()); |
| |
| Node* beforeStartAnchor = enclosingNodeWithTag(visibleStart.previous().deepEquivalent().downstream(), aTag); |
| Node* afterEndAnchor = enclosingNodeWithTag(visibleEnd.next().deepEquivalent().upstream(), aTag); |
| |
| if (startAnchor && startAnchor == endAnchor && startAnchor != beforeStartAnchor && endAnchor != afterEndAnchor) |
| document()->frame()->editor()->setRemovedAnchor(startAnchor->cloneNode(false)); |
| } |
| |
| void DeleteSelectionCommand::doApply() |
| { |
| // If selection has not been set to a custom selection when the command was created, |
| // use the current ending selection. |
| if (!m_hasSelectionToDelete) |
| m_selectionToDelete = endingSelection(); |
| |
| if (!m_selectionToDelete.isRange()) |
| return; |
| |
| // If the deletion is occurring in a text field, and we're not deleting to replace the selection, then let the frame call across the bridge to notify the form delegate. |
| if (!m_replace) { |
| Node* startNode = m_selectionToDelete.start().node(); |
| Node* ancestorNode = startNode ? startNode->shadowAncestorNode() : 0; |
| if (ancestorNode && ancestorNode->hasTagName(inputTag) |
| && static_cast<HTMLInputElement*>(ancestorNode)->isTextField() |
| && ancestorNode->focused()) |
| document()->frame()->textWillBeDeletedInTextField(static_cast<Element*>(ancestorNode)); |
| } |
| |
| // save this to later make the selection with |
| EAffinity affinity = m_selectionToDelete.affinity(); |
| |
| Position downstreamEnd = m_selectionToDelete.end().downstream(); |
| m_needPlaceholder = isStartOfParagraph(m_selectionToDelete.visibleStart()) && |
| isEndOfParagraph(m_selectionToDelete.visibleEnd()) && |
| !lineBreakExistsAtPosition(m_selectionToDelete.visibleEnd()); |
| if (m_needPlaceholder) { |
| // Don't need a placeholder when deleting a selection that starts just before a table |
| // and ends inside it (we do need placeholders to hold open empty cells, but that's |
| // handled elsewhere). |
| if (Node* table = isLastPositionBeforeTable(m_selectionToDelete.visibleStart())) |
| if (m_selectionToDelete.end().node()->isDescendantOf(table)) |
| m_needPlaceholder = false; |
| } |
| |
| |
| // set up our state |
| initializePositionData(); |
| |
| // Delete any text that may hinder our ability to fixup whitespace after the delete |
| deleteInsignificantTextDownstream(m_trailingWhitespace); |
| |
| saveTypingStyleState(); |
| |
| saveFullySelectedAnchor(); |
| |
| // deleting just a BR is handled specially, at least because we do not |
| // want to replace it with a placeholder BR! |
| if (handleSpecialCaseBRDelete()) { |
| calculateTypingStyleAfterDelete(); |
| setEndingSelection(Selection(m_endingPosition, affinity)); |
| clearTransientState(); |
| rebalanceWhitespace(); |
| return; |
| } |
| |
| handleGeneralDelete(); |
| |
| fixupWhitespace(); |
| |
| mergeParagraphs(); |
| |
| removePreviouslySelectedEmptyTableRows(); |
| |
| RefPtr<Node> placeholder = m_needPlaceholder ? createBreakElement(document()).get() : 0; |
| |
| if (placeholder) |
| insertNodeAt(placeholder.get(), m_endingPosition); |
| |
| rebalanceWhitespaceAt(m_endingPosition); |
| |
| calculateTypingStyleAfterDelete(); |
| |
| setEndingSelection(Selection(m_endingPosition, affinity)); |
| clearTransientState(); |
| } |
| |
| EditAction DeleteSelectionCommand::editingAction() const |
| { |
| // Note that DeleteSelectionCommand is also used when the user presses the Delete key, |
| // but in that case there's a TypingCommand that supplies the editingAction(), so |
| // the Undo menu correctly shows "Undo Typing" |
| return EditActionCut; |
| } |
| |
| // Normally deletion doesn't preserve the typing style that was present before it. For example, |
| // type a character, Bold, then delete the character and start typing. The Bold typing style shouldn't |
| // stick around. Deletion should preserve a typing style that *it* sets, however. |
| bool DeleteSelectionCommand::preservesTypingStyle() const |
| { |
| return m_typingStyle; |
| } |
| |
| } // namespace WebCore |
