| /* |
| * Copyright (C) 2006, 2008 Apple 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 "core/editing/commands/IndentOutdentCommand.h" |
| |
| #include "core/HTMLNames.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/ElementTraversal.h" |
| #include "core/editing/EditingUtilities.h" |
| #include "core/editing/VisibleUnits.h" |
| #include "core/editing/commands/InsertListCommand.h" |
| #include "core/html/HTMLBRElement.h" |
| #include "core/html/HTMLElement.h" |
| #include "core/layout/LayoutObject.h" |
| |
| namespace blink { |
| |
| using namespace HTMLNames; |
| |
| // Returns true if |node| is UL, OL, or BLOCKQUOTE with "display:block". |
| // "Outdent" command considers <BLOCKQUOTE style="display:inline"> makes |
| // indentation. |
| static bool isHTMLListOrBlockquoteElement(const Node* node) { |
| if (!node || !node->isHTMLElement()) |
| return false; |
| if (!node->layoutObject() || !node->layoutObject()->isLayoutBlock()) |
| return false; |
| const HTMLElement& element = toHTMLElement(*node); |
| // TODO(yosin): We should check OL/UL element has "list-style-type" CSS |
| // property to make sure they layout contents as list. |
| return isHTMLUListElement(element) || isHTMLOListElement(element) || |
| element.hasTagName(blockquoteTag); |
| } |
| |
| IndentOutdentCommand::IndentOutdentCommand(Document& document, |
| EIndentType typeOfAction) |
| : ApplyBlockElementCommand( |
| document, |
| blockquoteTag, |
| "margin: 0 0 0 40px; border: none; padding: 0px;"), |
| m_typeOfAction(typeOfAction) {} |
| |
| bool IndentOutdentCommand::tryIndentingAsListItem(const Position& start, |
| const Position& end, |
| EditingState* editingState) { |
| // If our selection is not inside a list, bail out. |
| Node* lastNodeInSelectedParagraph = start.anchorNode(); |
| HTMLElement* listElement = enclosingList(lastNodeInSelectedParagraph); |
| if (!listElement) |
| return false; |
| |
| // Find the block that we want to indent. If it's not a list item (e.g., a |
| // div inside a list item), we bail out. |
| Element* selectedListItem = enclosingBlock(lastNodeInSelectedParagraph); |
| |
| // FIXME: we need to deal with the case where there is no li (malformed HTML) |
| if (!isHTMLLIElement(selectedListItem)) |
| return false; |
| |
| // FIXME: previousElementSibling does not ignore non-rendered content like |
| // <span></span>. Should we? |
| Element* previousList = ElementTraversal::previousSibling(*selectedListItem); |
| Element* nextList = ElementTraversal::nextSibling(*selectedListItem); |
| |
| // We should calculate visible range in list item because inserting new |
| // list element will change visibility of list item, e.g. :first-child |
| // CSS selector. |
| HTMLElement* newList = toHTMLElement( |
| document().createElement(listElement->tagQName(), CreatedByCloneNode)); |
| insertNodeBefore(newList, selectedListItem, editingState); |
| if (editingState->isAborted()) |
| return false; |
| |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| // We should clone all the children of the list item for indenting purposes. |
| // However, in case the current selection does not encompass all its children, |
| // we need to explicitally handle the same. The original list item too would |
| // require proper deletion in that case. |
| if (end.anchorNode() == selectedListItem || |
| end.anchorNode()->isDescendantOf(selectedListItem->lastChild())) { |
| moveParagraphWithClones(createVisiblePosition(start), |
| createVisiblePosition(end), newList, |
| selectedListItem, editingState); |
| } else { |
| moveParagraphWithClones( |
| createVisiblePosition(start), |
| VisiblePosition::afterNode(selectedListItem->lastChild()), newList, |
| selectedListItem, editingState); |
| if (editingState->isAborted()) |
| return false; |
| removeNode(selectedListItem, editingState); |
| } |
| if (editingState->isAborted()) |
| return false; |
| |
| if (canMergeLists(previousList, newList)) { |
| mergeIdenticalElements(previousList, newList, editingState); |
| if (editingState->isAborted()) |
| return false; |
| } |
| if (canMergeLists(newList, nextList)) { |
| mergeIdenticalElements(newList, nextList, editingState); |
| if (editingState->isAborted()) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void IndentOutdentCommand::indentIntoBlockquote(const Position& start, |
| const Position& end, |
| HTMLElement*& targetBlockquote, |
| EditingState* editingState) { |
| Element* enclosingCell = toElement(enclosingNodeOfType(start, &isTableCell)); |
| Element* elementToSplitTo; |
| if (enclosingCell) |
| elementToSplitTo = enclosingCell; |
| else if (enclosingList(start.computeContainerNode())) |
| elementToSplitTo = enclosingBlock(start.computeContainerNode()); |
| else |
| elementToSplitTo = rootEditableElementOf(start); |
| |
| if (!elementToSplitTo) |
| return; |
| |
| Node* outerBlock = |
| (start.computeContainerNode() == elementToSplitTo) |
| ? start.computeContainerNode() |
| : splitTreeToNode(start.computeContainerNode(), elementToSplitTo); |
| |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| VisiblePosition startOfContents = createVisiblePosition(start); |
| if (!targetBlockquote) { |
| // Create a new blockquote and insert it as a child of the root editable |
| // element. We accomplish this by splitting all parents of the current |
| // paragraph up to that point. |
| targetBlockquote = createBlockElement(); |
| if (outerBlock == start.computeContainerNode()) { |
| // When we apply indent to an empty <blockquote>, we should call |
| // insertNodeAfter(). See http://crbug.com/625802 for more details. |
| if (outerBlock->hasTagName(blockquoteTag)) |
| insertNodeAfter(targetBlockquote, outerBlock, editingState); |
| else |
| insertNodeAt(targetBlockquote, start, editingState); |
| } else |
| insertNodeBefore(targetBlockquote, outerBlock, editingState); |
| if (editingState->isAborted()) |
| return; |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| startOfContents = VisiblePosition::inParentAfterNode(*targetBlockquote); |
| } |
| |
| VisiblePosition endOfContents = createVisiblePosition(end); |
| if (startOfContents.isNull() || endOfContents.isNull()) |
| return; |
| moveParagraphWithClones(startOfContents, endOfContents, targetBlockquote, |
| outerBlock, editingState); |
| } |
| |
| void IndentOutdentCommand::outdentParagraph(EditingState* editingState) { |
| VisiblePosition visibleStartOfParagraph = |
| startOfParagraph(endingSelection().visibleStart()); |
| VisiblePosition visibleEndOfParagraph = |
| endOfParagraph(visibleStartOfParagraph); |
| |
| HTMLElement* enclosingElement = toHTMLElement( |
| enclosingNodeOfType(visibleStartOfParagraph.deepEquivalent(), |
| &isHTMLListOrBlockquoteElement)); |
| // We can't outdent if there is no place to go! |
| if (!enclosingElement || !hasEditableStyle(*enclosingElement->parentNode())) |
| return; |
| |
| // Use InsertListCommand to remove the selection from the list |
| if (isHTMLOListElement(*enclosingElement)) { |
| applyCommandToComposite( |
| InsertListCommand::create(document(), InsertListCommand::OrderedList), |
| editingState); |
| return; |
| } |
| if (isHTMLUListElement(*enclosingElement)) { |
| applyCommandToComposite( |
| InsertListCommand::create(document(), InsertListCommand::UnorderedList), |
| editingState); |
| return; |
| } |
| |
| // The selection is inside a blockquote i.e. enclosingNode is a blockquote |
| VisiblePosition positionInEnclosingBlock = |
| VisiblePosition::firstPositionInNode(enclosingElement); |
| // If the blockquote is inline, the start of the enclosing block coincides |
| // with positionInEnclosingBlock. |
| VisiblePosition startOfEnclosingBlock = |
| (enclosingElement->layoutObject() && |
| enclosingElement->layoutObject()->isInline()) |
| ? positionInEnclosingBlock |
| : startOfBlock(positionInEnclosingBlock); |
| VisiblePosition lastPositionInEnclosingBlock = |
| VisiblePosition::lastPositionInNode(enclosingElement); |
| VisiblePosition endOfEnclosingBlock = |
| endOfBlock(lastPositionInEnclosingBlock); |
| if (visibleStartOfParagraph.deepEquivalent() == |
| startOfEnclosingBlock.deepEquivalent() && |
| visibleEndOfParagraph.deepEquivalent() == |
| endOfEnclosingBlock.deepEquivalent()) { |
| // The blockquote doesn't contain anything outside the paragraph, so it can |
| // be totally removed. |
| Node* splitPoint = enclosingElement->nextSibling(); |
| removeNodePreservingChildren(enclosingElement, editingState); |
| if (editingState->isAborted()) |
| return; |
| // outdentRegion() assumes it is operating on the first paragraph of an |
| // enclosing blockquote, but if there are multiply nested blockquotes and |
| // we've just removed one, then this assumption isn't true. By splitting the |
| // next containing blockquote after this node, we keep this assumption true |
| if (splitPoint) { |
| if (Element* splitPointParent = splitPoint->parentElement()) { |
| // We can't outdent if there is no place to go! |
| if (splitPointParent->hasTagName(blockquoteTag) && |
| !splitPoint->hasTagName(blockquoteTag) && |
| hasEditableStyle(*splitPointParent->parentNode())) |
| splitElement(splitPointParent, splitPoint); |
| } |
| } |
| |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| visibleStartOfParagraph = |
| createVisiblePosition(visibleStartOfParagraph.deepEquivalent()); |
| if (visibleStartOfParagraph.isNotNull() && |
| !isStartOfParagraph(visibleStartOfParagraph)) { |
| insertNodeAt(HTMLBRElement::create(document()), |
| visibleStartOfParagraph.deepEquivalent(), editingState); |
| if (editingState->isAborted()) |
| return; |
| } |
| |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| visibleEndOfParagraph = |
| createVisiblePosition(visibleEndOfParagraph.deepEquivalent()); |
| if (visibleEndOfParagraph.isNotNull() && |
| !isEndOfParagraph(visibleEndOfParagraph)) |
| insertNodeAt(HTMLBRElement::create(document()), |
| visibleEndOfParagraph.deepEquivalent(), editingState); |
| return; |
| } |
| |
| Node* splitBlockquoteNode = enclosingElement; |
| if (Element* enclosingBlockFlow = enclosingBlock( |
| visibleStartOfParagraph.deepEquivalent().anchorNode())) { |
| if (enclosingBlockFlow != enclosingElement) { |
| splitBlockquoteNode = |
| splitTreeToNode(enclosingBlockFlow, enclosingElement, true); |
| } else { |
| // We split the blockquote at where we start outdenting. |
| Node* highestInlineNode = highestEnclosingNodeOfType( |
| visibleStartOfParagraph.deepEquivalent(), isInline, |
| CannotCrossEditingBoundary, enclosingBlockFlow); |
| splitElement(enclosingElement, |
| highestInlineNode |
| ? highestInlineNode |
| : visibleStartOfParagraph.deepEquivalent().anchorNode()); |
| } |
| |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| |
| // Re-canonicalize visible{Start,End}OfParagraph, make them valid again |
| // after DOM change. |
| // TODO(xiaochengh): We should not store a VisiblePosition and later inspect |
| // its properties when it is already invalidated. |
| visibleStartOfParagraph = |
| createVisiblePosition(visibleStartOfParagraph.toPositionWithAffinity()); |
| visibleEndOfParagraph = |
| createVisiblePosition(visibleEndOfParagraph.toPositionWithAffinity()); |
| } |
| |
| VisiblePosition startOfParagraphToMove = |
| startOfParagraph(visibleStartOfParagraph); |
| VisiblePosition endOfParagraphToMove = endOfParagraph(visibleEndOfParagraph); |
| if (startOfParagraphToMove.isNull() || endOfParagraphToMove.isNull()) |
| return; |
| HTMLBRElement* placeholder = HTMLBRElement::create(document()); |
| insertNodeBefore(placeholder, splitBlockquoteNode, editingState); |
| if (editingState->isAborted()) |
| return; |
| |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| moveParagraph(startOfParagraphToMove, endOfParagraphToMove, |
| VisiblePosition::beforeNode(placeholder), editingState, |
| PreserveSelection); |
| } |
| |
| // FIXME: We should merge this function with |
| // ApplyBlockElementCommand::formatSelection |
| void IndentOutdentCommand::outdentRegion( |
| const VisiblePosition& startOfSelection, |
| const VisiblePosition& endOfSelection, |
| EditingState* editingState) { |
| VisiblePosition endOfCurrentParagraph = endOfParagraph(startOfSelection); |
| VisiblePosition endOfLastParagraph = endOfParagraph(endOfSelection); |
| |
| if (endOfCurrentParagraph.deepEquivalent() == |
| endOfLastParagraph.deepEquivalent()) { |
| outdentParagraph(editingState); |
| return; |
| } |
| |
| Position originalSelectionEnd = endingSelection().end(); |
| Position endAfterSelection = |
| endOfParagraph(nextPositionOf(endOfLastParagraph)).deepEquivalent(); |
| |
| while (endOfCurrentParagraph.deepEquivalent() != endAfterSelection) { |
| PositionWithAffinity endOfNextParagraph = |
| endOfParagraph(nextPositionOf(endOfCurrentParagraph)) |
| .toPositionWithAffinity(); |
| if (endOfCurrentParagraph.deepEquivalent() == |
| endOfLastParagraph.deepEquivalent()) { |
| setEndingSelection(createVisibleSelection(originalSelectionEnd, |
| TextAffinity::Downstream)); |
| } else { |
| setEndingSelection(endOfCurrentParagraph); |
| } |
| |
| outdentParagraph(editingState); |
| if (editingState->isAborted()) |
| return; |
| |
| // outdentParagraph could move more than one paragraph if the paragraph |
| // is in a list item. As a result, endAfterSelection and endOfNextParagraph |
| // could refer to positions no longer in the document. |
| if (endAfterSelection.isNotNull() && !endAfterSelection.isConnected()) |
| break; |
| |
| document().updateStyleAndLayoutIgnorePendingStylesheets(); |
| if (endOfNextParagraph.isNotNull() && |
| !endOfNextParagraph.position().isConnected()) { |
| endOfCurrentParagraph = createVisiblePosition(endingSelection().end()); |
| endOfNextParagraph = endOfParagraph(nextPositionOf(endOfCurrentParagraph)) |
| .toPositionWithAffinity(); |
| } |
| endOfCurrentParagraph = createVisiblePosition(endOfNextParagraph); |
| } |
| } |
| |
| void IndentOutdentCommand::formatSelection( |
| const VisiblePosition& startOfSelection, |
| const VisiblePosition& endOfSelection, |
| EditingState* editingState) { |
| if (m_typeOfAction == Indent) |
| ApplyBlockElementCommand::formatSelection(startOfSelection, endOfSelection, |
| editingState); |
| else |
| outdentRegion(startOfSelection, endOfSelection, editingState); |
| } |
| |
| void IndentOutdentCommand::formatRange(const Position& start, |
| const Position& end, |
| const Position&, |
| HTMLElement*& blockquoteForNextIndent, |
| EditingState* editingState) { |
| bool indentingAsListItemResult = |
| tryIndentingAsListItem(start, end, editingState); |
| if (editingState->isAborted()) |
| return; |
| if (indentingAsListItemResult) |
| blockquoteForNextIndent = nullptr; |
| else |
| indentIntoBlockquote(start, end, blockquoteForNextIndent, editingState); |
| } |
| |
| InputEvent::InputType IndentOutdentCommand::inputType() const { |
| return m_typeOfAction == Indent ? InputEvent::InputType::Indent |
| : InputEvent::InputType::Outdent; |
| } |
| |
| } // namespace blink |
