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/*
* 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 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 "IndentOutdentCommand.h"
#include "Document.h"
#include "Editing.h"
#include "ElementTraversal.h"
#include "HTMLBRElement.h"
#include "HTMLNames.h"
#include "HTMLOListElement.h"
#include "HTMLUListElement.h"
#include "InsertLineBreakCommand.h"
#include "InsertListCommand.h"
#include "RenderElement.h"
#include "SplitElementCommand.h"
#include "Text.h"
#include "VisibleUnits.h"
namespace WebCore {
using namespace HTMLNames;
static bool isListOrIndentBlockquote(const Node* node)
{
return node && (node->hasTagName(ulTag) || node->hasTagName(olTag) || node->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)
{
// If our selection is not inside a list, bail out.
Node* lastNodeInSelectedParagraph = start.deprecatedNode();
RefPtr<Element> listNode = enclosingList(lastNodeInSelectedParagraph);
if (!listNode)
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.
RefPtr<Element> selectedListItem = enclosingBlock(lastNodeInSelectedParagraph);
if (!selectedListItem || !selectedListItem->hasTagName(liTag))
return false;
// FIXME: previousElementSibling does not ignore non-rendered content like <span></span>. Should we?
RefPtr<Element> previousList = ElementTraversal::previousSibling(*selectedListItem);
RefPtr<Element> nextList = ElementTraversal::nextSibling(*selectedListItem);
RefPtr<Element> newList;
if (is<HTMLUListElement>(*listNode))
newList = HTMLUListElement::create(document());
else
newList = HTMLOListElement::create(document());
insertNodeBefore(*newList, *selectedListItem);
moveParagraphWithClones(start, end, newList.get(), selectedListItem.get());
if (canMergeLists(previousList.get(), newList.get()))
mergeIdenticalElements(*previousList, *newList);
if (canMergeLists(newList.get(), nextList.get()))
mergeIdenticalElements(*newList, *nextList);
return true;
}
void IndentOutdentCommand::indentIntoBlockquote(const Position& start, const Position& end, RefPtr<Element>& targetBlockquote)
{
Node* enclosingCell = enclosingNodeOfType(start, &isTableCell);
Node* nodeToSplitTo;
if (enclosingCell)
nodeToSplitTo = enclosingCell;
else if (enclosingList(start.containerNode()))
nodeToSplitTo = enclosingBlock(start.containerNode());
else
nodeToSplitTo = editableRootForPosition(start);
if (!nodeToSplitTo)
return;
RefPtr<Node> nodeAfterStart = start.computeNodeAfterPosition();
RefPtr<Node> outerBlock = (start.containerNode() == nodeToSplitTo) ? start.containerNode() : splitTreeToNode(*start.containerNode(), *nodeToSplitTo);
VisiblePosition startOfContents = 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 == nodeToSplitTo)
insertNodeAt(*targetBlockquote, start);
else
insertNodeBefore(*targetBlockquote, *outerBlock);
startOfContents = positionInParentAfterNode(targetBlockquote.get());
}
moveParagraphWithClones(startOfContents, end, targetBlockquote.get(), outerBlock.get());
}
void IndentOutdentCommand::outdentParagraph()
{
VisiblePosition visibleStartOfParagraph = startOfParagraph(endingSelection().visibleStart());
VisiblePosition visibleEndOfParagraph = endOfParagraph(visibleStartOfParagraph);
auto* enclosingNode = downcast<HTMLElement>(enclosingNodeOfType(visibleStartOfParagraph.deepEquivalent(), &isListOrIndentBlockquote));
if (!enclosingNode || !enclosingNode->parentNode()->hasEditableStyle()) // We can't outdent if there is no place to go!
return;
// Use InsertListCommand to remove the selection from the list
if (enclosingNode->hasTagName(olTag)) {
applyCommandToComposite(InsertListCommand::create(document(), InsertListCommand::Type::OrderedList));
return;
}
if (enclosingNode->hasTagName(ulTag)) {
applyCommandToComposite(InsertListCommand::create(document(), InsertListCommand::Type::UnorderedList));
return;
}
// The selection is inside a blockquote i.e. enclosingNode is a blockquote
VisiblePosition positionInEnclosingBlock = VisiblePosition(firstPositionInNode(enclosingNode));
// If the blockquote is inline, the start of the enclosing block coincides with
// positionInEnclosingBlock.
VisiblePosition startOfEnclosingBlock = (enclosingNode->renderer() && enclosingNode->renderer()->isInline()) ? positionInEnclosingBlock : startOfBlock(positionInEnclosingBlock);
VisiblePosition lastPositionInEnclosingBlock = VisiblePosition(lastPositionInNode(enclosingNode));
VisiblePosition endOfEnclosingBlock = endOfBlock(lastPositionInEnclosingBlock);
if (visibleStartOfParagraph == startOfEnclosingBlock &&
visibleEndOfParagraph == endOfEnclosingBlock) {
// The blockquote doesn't contain anything outside the paragraph, so it can be totally removed.
Node* splitPoint = enclosingNode->nextSibling();
removeNodePreservingChildren(*enclosingNode);
// 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 (ContainerNode* splitPointParent = splitPoint->parentNode()) {
if (splitPointParent->hasTagName(blockquoteTag)
&& !splitPoint->hasTagName(blockquoteTag)
&& splitPointParent->parentNode()->hasEditableStyle()) // We can't outdent if there is no place to go!
splitElement(downcast<Element>(*splitPointParent), *splitPoint);
}
}
document().updateLayoutIgnorePendingStylesheets();
visibleStartOfParagraph = VisiblePosition(visibleStartOfParagraph.deepEquivalent());
visibleEndOfParagraph = VisiblePosition(visibleEndOfParagraph.deepEquivalent());
if (visibleStartOfParagraph.isNotNull() && !isStartOfParagraph(visibleStartOfParagraph))
insertNodeAt(HTMLBRElement::create(document()), visibleStartOfParagraph.deepEquivalent());
if (visibleEndOfParagraph.isNotNull() && !isEndOfParagraph(visibleEndOfParagraph))
insertNodeAt(HTMLBRElement::create(document()), visibleEndOfParagraph.deepEquivalent());
return;
}
auto* startOfParagraphNode = visibleStartOfParagraph.deepEquivalent().deprecatedNode();
auto* enclosingBlockFlow = enclosingBlock(startOfParagraphNode);
RefPtr<Node> splitBlockquoteNode = enclosingNode;
if (enclosingBlockFlow != enclosingNode)
splitBlockquoteNode = splitTreeToNode(*startOfParagraphNode, *enclosingNode, true);
else {
// We split the blockquote at where we start outdenting.
auto* highestInlineNode = highestEnclosingNodeOfType(visibleStartOfParagraph.deepEquivalent(), isInline, CannotCrossEditingBoundary, enclosingBlockFlow);
splitElement(*enclosingNode, highestInlineNode ? *highestInlineNode : *visibleStartOfParagraph.deepEquivalent().deprecatedNode());
}
auto placeholder = HTMLBRElement::create(document());
auto* placeholderPtr = placeholder.ptr();
insertNodeBefore(WTFMove(placeholder), *splitBlockquoteNode);
moveParagraph(startOfParagraph(visibleStartOfParagraph), endOfParagraph(visibleEndOfParagraph), positionBeforeNode(placeholderPtr), true);
}
// FIXME: We should merge this function with ApplyBlockElementCommand::formatSelection
void IndentOutdentCommand::outdentRegion(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection)
{
VisiblePosition endOfLastParagraph = endOfParagraph(endOfSelection);
if (endOfParagraph(startOfSelection) == endOfLastParagraph) {
outdentParagraph();
return;
}
Position originalSelectionEnd = endingSelection().end();
VisiblePosition endOfCurrentParagraph = endOfParagraph(startOfSelection);
VisiblePosition endAfterSelection = endOfParagraph(endOfParagraph(endOfSelection).next());
while (endOfCurrentParagraph != endAfterSelection) {
VisiblePosition endOfNextParagraph = endOfParagraph(endOfCurrentParagraph.next());
if (endOfCurrentParagraph == endOfLastParagraph)
setEndingSelection(VisibleSelection(originalSelectionEnd, DOWNSTREAM));
else
setEndingSelection(endOfCurrentParagraph);
outdentParagraph();
// 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.deepEquivalent().anchorNode()->isConnected())
break;
if (endOfNextParagraph.isNotNull() && !endOfNextParagraph.deepEquivalent().anchorNode()->isConnected()) {
endOfCurrentParagraph = endingSelection().end();
endOfNextParagraph = endOfParagraph(endOfCurrentParagraph.next());
}
endOfCurrentParagraph = endOfNextParagraph;
if (endOfCurrentParagraph.isNull()) {
// If the end of the current paragraph is null, we'll end up looping infinitely, since the end of the next paragraph
// (and the paragraph after that, and so on) will always be null. To avoid this infinite loop, just bail.
break;
}
}
}
void IndentOutdentCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection)
{
if (m_typeOfAction == Indent)
ApplyBlockElementCommand::formatSelection(startOfSelection, endOfSelection);
else
outdentRegion(startOfSelection, endOfSelection);
}
void IndentOutdentCommand::formatRange(const Position& start, const Position& end, const Position&, RefPtr<Element>& blockquoteForNextIndent)
{
if (tryIndentingAsListItem(start, end))
blockquoteForNextIndent = nullptr;
else
indentIntoBlockquote(start, end, blockquoteForNextIndent);
}
}