| /* |
| * Copyright (C) 2006, 2010 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 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 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 "InsertListCommand.h" |
| |
| #include "Editing.h" |
| #include "ElementTraversal.h" |
| #include "HTMLBRElement.h" |
| #include "HTMLLIElement.h" |
| #include "HTMLNames.h" |
| #include "HTMLUListElement.h" |
| #include "Range.h" |
| #include "VisibleUnits.h" |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| static Node* enclosingListChild(Node* node, Node* listNode) |
| { |
| Node* listChild = enclosingListChild(node); |
| while (listChild && enclosingList(listChild) != listNode) |
| listChild = enclosingListChild(listChild->parentNode()); |
| return listChild; |
| } |
| |
| RefPtr<HTMLElement> InsertListCommand::insertList(Document& document, Type type) |
| { |
| RefPtr<InsertListCommand> insertCommand = create(document, type); |
| insertCommand->apply(); |
| return insertCommand->m_listElement; |
| } |
| |
| HTMLElement& InsertListCommand::fixOrphanedListChild(Node& node) |
| { |
| auto listElement = HTMLUListElement::create(document()); |
| insertNodeBefore(listElement.copyRef(), node); |
| removeNode(node); |
| appendNode(node, listElement.copyRef()); |
| m_listElement = WTFMove(listElement); |
| return *m_listElement; |
| } |
| |
| Ref<HTMLElement> InsertListCommand::mergeWithNeighboringLists(HTMLElement& list) |
| { |
| Ref<HTMLElement> protectedList = list; |
| Element* previousList = list.previousElementSibling(); |
| if (canMergeLists(previousList, &list)) |
| mergeIdenticalElements(*previousList, list); |
| |
| Element* sibling = ElementTraversal::nextSibling(list); |
| if (!is<HTMLElement>(sibling)) |
| return protectedList; |
| |
| Ref<HTMLElement> nextList = downcast<HTMLElement>(*sibling); |
| if (canMergeLists(&list, nextList.ptr())) { |
| mergeIdenticalElements(list, nextList); |
| return nextList; |
| } |
| return protectedList; |
| } |
| |
| bool InsertListCommand::selectionHasListOfType(const VisibleSelection& selection, const QualifiedName& listTag) |
| { |
| VisiblePosition start = selection.visibleStart(); |
| |
| if (!enclosingList(start.deepEquivalent().deprecatedNode())) |
| return false; |
| |
| VisiblePosition end = startOfParagraph(selection.visibleEnd()); |
| while (start.isNotNull() && start != end) { |
| Element* listNode = enclosingList(start.deepEquivalent().deprecatedNode()); |
| if (!listNode || !listNode->hasTagName(listTag)) |
| return false; |
| start = startOfNextParagraph(start); |
| } |
| |
| return true; |
| } |
| |
| InsertListCommand::InsertListCommand(Document& document, Type type) |
| : CompositeEditCommand(document) |
| , m_type(type) |
| { |
| } |
| |
| void InsertListCommand::doApply() |
| { |
| if (endingSelection().isNoneOrOrphaned() || !endingSelection().isContentRichlyEditable()) |
| return; |
| |
| VisiblePosition visibleEnd = endingSelection().visibleEnd(); |
| VisiblePosition visibleStart = endingSelection().visibleStart(); |
| // When a selection ends at the start of a paragraph, we rarely paint |
| // the selection gap before that paragraph, because there often is no gap. |
| // In a case like this, it's not obvious to the user that the selection |
| // ends "inside" that paragraph, so it would be confusing if InsertUn{Ordered}List |
| // operated on that paragraph. |
| // FIXME: We paint the gap before some paragraphs that are indented with left |
| // margin/padding, but not others. We should make the gap painting more consistent and |
| // then use a left margin/padding rule here. |
| if (visibleEnd != visibleStart && isStartOfParagraph(visibleEnd, CanSkipOverEditingBoundary)) { |
| setEndingSelection(VisibleSelection(visibleStart, visibleEnd.previous(CannotCrossEditingBoundary), endingSelection().isDirectional())); |
| if (!endingSelection().rootEditableElement()) |
| return; |
| } |
| |
| auto& listTag = (m_type == Type::OrderedList) ? olTag : ulTag; |
| if (endingSelection().isRange()) { |
| VisibleSelection selection = selectionForParagraphIteration(endingSelection()); |
| ASSERT(selection.isRange()); |
| VisiblePosition startOfSelection = selection.visibleStart(); |
| VisiblePosition endOfSelection = selection.visibleEnd(); |
| VisiblePosition startOfLastParagraph = startOfParagraph(endOfSelection, CanSkipOverEditingBoundary); |
| |
| if (startOfParagraph(startOfSelection, CanSkipOverEditingBoundary) != startOfLastParagraph) { |
| bool forceCreateList = !selectionHasListOfType(selection, listTag); |
| |
| RefPtr<Range> currentSelection = endingSelection().firstRange(); |
| VisiblePosition startOfCurrentParagraph = startOfSelection; |
| while (!inSameParagraph(startOfCurrentParagraph, startOfLastParagraph, CanCrossEditingBoundary)) { |
| // doApply() may operate on and remove the last paragraph of the selection from the document |
| // if it's in the same list item as startOfCurrentParagraph. Return early to avoid an |
| // infinite loop and because there is no more work to be done. |
| // FIXME(<rdar://problem/5983974>): The endingSelection() may be incorrect here. Compute |
| // the new location of endOfSelection and use it as the end of the new selection. |
| if (!startOfLastParagraph.deepEquivalent().anchorNode()->isConnected()) |
| return; |
| setEndingSelection(startOfCurrentParagraph); |
| |
| // Save and restore endOfSelection and startOfLastParagraph when necessary |
| // since moveParagraph and movePragraphWithClones can remove nodes. |
| // FIXME: This is an inefficient way to keep selection alive because indexForVisiblePosition walks from |
| // the beginning of the document to the endOfSelection everytime this code is executed. |
| // But not using index is hard because there are so many ways we can lose selection inside doApplyForSingleParagraph. |
| RefPtr<ContainerNode> scope; |
| int indexForEndOfSelection = indexForVisiblePosition(endOfSelection, scope); |
| doApplyForSingleParagraph(forceCreateList, listTag, currentSelection.get()); |
| if (endOfSelection.isNull() || endOfSelection.isOrphan() || startOfLastParagraph.isNull() || startOfLastParagraph.isOrphan()) { |
| endOfSelection = visiblePositionForIndex(indexForEndOfSelection, scope.get()); |
| // If endOfSelection is null, then some contents have been deleted from the document. |
| // This should never happen and if it did, exit early immediately because we've lost the loop invariant. |
| ASSERT(endOfSelection.isNotNull()); |
| if (endOfSelection.isNull()) |
| return; |
| startOfLastParagraph = startOfParagraph(endOfSelection, CanSkipOverEditingBoundary); |
| } |
| |
| // Fetch the start of the selection after moving the first paragraph, |
| // because moving the paragraph will invalidate the original start. |
| // We'll use the new start to restore the original selection after |
| // we modified all selected paragraphs. |
| if (startOfCurrentParagraph == startOfSelection) |
| startOfSelection = endingSelection().visibleStart(); |
| |
| startOfCurrentParagraph = startOfNextParagraph(endingSelection().visibleStart()); |
| } |
| setEndingSelection(endOfSelection); |
| doApplyForSingleParagraph(forceCreateList, listTag, currentSelection.get()); |
| // Fetch the end of the selection, for the reason mentioned above. |
| endOfSelection = endingSelection().visibleEnd(); |
| setEndingSelection(VisibleSelection(startOfSelection, endOfSelection, endingSelection().isDirectional())); |
| return; |
| } |
| } |
| |
| doApplyForSingleParagraph(false, listTag, endingSelection().firstRange().get()); |
| } |
| |
| EditAction InsertListCommand::editingAction() const |
| { |
| return m_type == Type::OrderedList ? EditAction::InsertOrderedList : EditAction::InsertUnorderedList; |
| } |
| |
| void InsertListCommand::doApplyForSingleParagraph(bool forceCreateList, const HTMLQualifiedName& listTag, Range* currentSelection) |
| { |
| // FIXME: This will produce unexpected results for a selection that starts just before a |
| // table and ends inside the first cell, selectionForParagraphIteration should probably |
| // be renamed and deployed inside setEndingSelection(). |
| Node* selectionNode = endingSelection().start().deprecatedNode(); |
| Node* listChildNode = enclosingListChild(selectionNode); |
| bool switchListType = false; |
| if (listChildNode) { |
| // Remove the list chlild. |
| RefPtr<HTMLElement> listNode = enclosingList(listChildNode); |
| if (!listNode) |
| listNode = mergeWithNeighboringLists(fixOrphanedListChild(*listChildNode)); |
| |
| if (!listNode->hasTagName(listTag)) { |
| // listChildNode will be removed from the list and a list of type m_type will be created. |
| switchListType = true; |
| } |
| |
| // If the list is of the desired type, and we are not removing the list, then exit early. |
| if (!switchListType && forceCreateList) |
| return; |
| |
| // If the entire list is selected, then convert the whole list. |
| if (switchListType && isNodeVisiblyContainedWithin(*listNode, *currentSelection)) { |
| bool rangeStartIsInList = visiblePositionBeforeNode(*listNode) == currentSelection->startPosition(); |
| bool rangeEndIsInList = visiblePositionAfterNode(*listNode) == currentSelection->endPosition(); |
| |
| RefPtr<HTMLElement> newList = createHTMLElement(document(), listTag); |
| insertNodeBefore(*newList, *listNode); |
| |
| auto* firstChildInList = enclosingListChild(VisiblePosition(firstPositionInNode(listNode.get())).deepEquivalent().deprecatedNode(), listNode.get()); |
| Node* outerBlock = firstChildInList && isBlockFlowElement(*firstChildInList) ? firstChildInList : listNode.get(); |
| |
| moveParagraphWithClones(firstPositionInNode(listNode.get()), lastPositionInNode(listNode.get()), newList.get(), outerBlock); |
| |
| // Manually remove listNode because moveParagraphWithClones sometimes leaves it behind in the document. |
| // See the bug 33668 and editing/execCommand/insert-list-orphaned-item-with-nested-lists.html. |
| // FIXME: This might be a bug in moveParagraphWithClones or deleteSelection. |
| if (listNode && listNode->isConnected()) |
| removeNode(*listNode); |
| |
| newList = mergeWithNeighboringLists(*newList); |
| |
| // Restore the start and the end of current selection if they started inside listNode |
| // because moveParagraphWithClones could have removed them. |
| if (rangeStartIsInList && newList) |
| currentSelection->setStart(*newList, 0); |
| if (rangeEndIsInList && newList) |
| currentSelection->setEnd(*newList, lastOffsetInNode(newList.get())); |
| |
| setEndingSelection(VisiblePosition(firstPositionInNode(newList.get()))); |
| |
| return; |
| } |
| |
| unlistifyParagraph(endingSelection().visibleStart(), listNode.get(), listChildNode); |
| } |
| |
| if (!listChildNode || switchListType || forceCreateList) |
| m_listElement = listifyParagraph(endingSelection().visibleStart(), listTag); |
| } |
| |
| void InsertListCommand::unlistifyParagraph(const VisiblePosition& originalStart, HTMLElement* listNode, Node* listChildNode) |
| { |
| Node* nextListChild; |
| Node* previousListChild; |
| VisiblePosition start; |
| VisiblePosition end; |
| if (listChildNode->hasTagName(liTag)) { |
| start = firstPositionInNode(listChildNode); |
| end = lastPositionInNode(listChildNode); |
| nextListChild = listChildNode->nextSibling(); |
| previousListChild = listChildNode->previousSibling(); |
| } else { |
| // A paragraph is visually a list item minus a list marker. The paragraph will be moved. |
| start = startOfParagraph(originalStart, CanSkipOverEditingBoundary); |
| end = endOfParagraph(start, CanSkipOverEditingBoundary); |
| nextListChild = enclosingListChild(end.next().deepEquivalent().deprecatedNode(), listNode); |
| ASSERT(nextListChild != listChildNode); |
| previousListChild = enclosingListChild(start.previous().deepEquivalent().deprecatedNode(), listNode); |
| ASSERT(previousListChild != listChildNode); |
| } |
| // When removing a list, we must always create a placeholder to act as a point of insertion |
| // for the list content being removed. |
| auto placeholder = HTMLBRElement::create(document()); |
| RefPtr<Element> nodeToInsert = placeholder.copyRef(); |
| // If the content of the list item will be moved into another list, put it in a list item |
| // so that we don't create an orphaned list child. |
| if (enclosingList(listNode)) { |
| nodeToInsert = HTMLLIElement::create(document()); |
| appendNode(placeholder.copyRef(), *nodeToInsert); |
| } |
| |
| if (nextListChild && previousListChild) { |
| // We want to pull listChildNode out of listNode, and place it before nextListChild |
| // and after previousListChild, so we split listNode and insert it between the two lists. |
| // But to split listNode, we must first split ancestors of listChildNode between it and listNode, |
| // if any exist. |
| // FIXME: We appear to split at nextListChild as opposed to listChildNode so that when we remove |
| // listChildNode below in moveParagraphs, previousListChild will be removed along with it if it is |
| // unrendered. But we ought to remove nextListChild too, if it is unrendered. |
| splitElement(*listNode, *splitTreeToNode(*nextListChild, *listNode)); |
| insertNodeBefore(nodeToInsert.releaseNonNull(), *listNode); |
| } else if (nextListChild || listChildNode->parentNode() != listNode) { |
| // Just because listChildNode has no previousListChild doesn't mean there isn't any content |
| // in listNode that comes before listChildNode, as listChildNode could have ancestors |
| // between it and listNode. So, we split up to listNode before inserting the placeholder |
| // where we're about to move listChildNode to. |
| if (listChildNode->parentNode() != listNode) |
| splitElement(*listNode, *splitTreeToNode(*listChildNode, *listNode).get()); |
| insertNodeBefore(nodeToInsert.releaseNonNull(), *listNode); |
| } else |
| insertNodeAfter(nodeToInsert.releaseNonNull(), *listNode); |
| |
| VisiblePosition insertionPoint = VisiblePosition(positionBeforeNode(placeholder.ptr())); |
| moveParagraphs(start, end, insertionPoint, true); |
| } |
| |
| static Element* adjacentEnclosingList(const VisiblePosition& pos, const VisiblePosition& adjacentPos, const QualifiedName& listTag) |
| { |
| Element* listNode = outermostEnclosingList(adjacentPos.deepEquivalent().deprecatedNode()); |
| |
| if (!listNode) |
| return 0; |
| |
| Node* previousCell = enclosingTableCell(pos.deepEquivalent()); |
| Node* currentCell = enclosingTableCell(adjacentPos.deepEquivalent()); |
| |
| if (!listNode->hasTagName(listTag) |
| || listNode->contains(pos.deepEquivalent().deprecatedNode()) |
| || previousCell != currentCell |
| || enclosingList(listNode) != enclosingList(pos.deepEquivalent().deprecatedNode())) |
| return 0; |
| |
| return listNode; |
| } |
| |
| RefPtr<HTMLElement> InsertListCommand::listifyParagraph(const VisiblePosition& originalStart, const QualifiedName& listTag) |
| { |
| VisiblePosition start = startOfParagraph(originalStart, CanSkipOverEditingBoundary); |
| VisiblePosition end = endOfParagraph(start, CanSkipOverEditingBoundary); |
| |
| if (start.isNull() || end.isNull()) |
| return 0; |
| |
| // Check for adjoining lists. |
| auto listItemElement = HTMLLIElement::create(document()); |
| auto placeholder = HTMLBRElement::create(document()); |
| appendNode(placeholder.copyRef(), listItemElement.copyRef()); |
| |
| // Place list item into adjoining lists. |
| Element* previousList = adjacentEnclosingList(start.deepEquivalent(), start.previous(CannotCrossEditingBoundary), listTag); |
| Element* nextList = adjacentEnclosingList(start.deepEquivalent(), end.next(CannotCrossEditingBoundary), listTag); |
| RefPtr<HTMLElement> listElement; |
| if (previousList) |
| appendNode(WTFMove(listItemElement), *previousList); |
| else if (nextList) |
| insertNodeAt(WTFMove(listItemElement), positionBeforeNode(nextList)); |
| else { |
| // Create the list. |
| listElement = createHTMLElement(document(), listTag); |
| appendNode(WTFMove(listItemElement), *listElement); |
| |
| if (start == end && isBlock(start.deepEquivalent().deprecatedNode())) { |
| // Inserting the list into an empty paragraph that isn't held open |
| // by a br or a '\n', will invalidate start and end. Insert |
| // a placeholder and then recompute start and end. |
| auto blockPlaceholder = insertBlockPlaceholder(start.deepEquivalent()); |
| start = positionBeforeNode(blockPlaceholder.get()); |
| end = start; |
| } |
| |
| // Insert the list at a position visually equivalent to start of the |
| // paragraph that is being moved into the list. |
| // Try to avoid inserting it somewhere where it will be surrounded by |
| // inline ancestors of start, since it is easier for editing to produce |
| // clean markup when inline elements are pushed down as far as possible. |
| Position insertionPos(start.deepEquivalent().upstream()); |
| // Also avoid the containing list item. |
| Node* listChild = enclosingListChild(insertionPos.deprecatedNode()); |
| if (listChild && listChild->hasTagName(liTag)) |
| insertionPos = positionInParentBeforeNode(listChild); |
| |
| insertNodeAt(*listElement, insertionPos); |
| |
| // We inserted the list at the start of the content we're about to move |
| // Update the start of content, so we don't try to move the list into itself. bug 19066 |
| // Layout is necessary since start's node's inline renderers may have been destroyed by the insertion |
| // The end of the content may have changed after the insertion and layout so update it as well. |
| if (insertionPos == start.deepEquivalent()) { |
| listElement->document().updateLayoutIgnorePendingStylesheets(); |
| start = startOfParagraph(originalStart, CanSkipOverEditingBoundary); |
| end = endOfParagraph(start, CanSkipOverEditingBoundary); |
| } |
| } |
| |
| moveParagraph(start, end, positionBeforeNode(placeholder.ptr()), true); |
| |
| if (listElement) |
| return mergeWithNeighboringLists(*listElement); |
| |
| if (canMergeLists(previousList, nextList)) |
| mergeIdenticalElements(*previousList, *nextList); |
| |
| return listElement; |
| } |
| |
| } |
