Move execCommand related files in core/editing/ related files into core/editing/commands/

Source/core/editing/BreakBlockquoteCommand.cpp

-/*
- * 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 "core/editing/BreakBlockquoteCommand.h"
-
-#include "core/HTMLNames.h"
-#include "core/dom/NodeTraversal.h"
-#include "core/dom/Text.h"
-#include "core/editing/EditingUtilities.h"
-#include "core/editing/VisiblePosition.h"
-#include "core/html/HTMLBRElement.h"
-#include "core/html/HTMLElement.h"
-#include "core/html/HTMLQuoteElement.h"
-#include "core/layout/LayoutListItem.h"
-
-namespace blink {
-
-using namespace HTMLNames;
-
-namespace {
-
-bool isFirstVisiblePositionInNode(const VisiblePosition& visiblePosition, const ContainerNode* node)
-{
-    if (visiblePosition.isNull())
-        return false;
-
-    if (!visiblePosition.deepEquivalent().computeContainerNode()->isDescendantOf(node))
-        return false;
-
-    VisiblePosition previous = visiblePosition.previous();
-    return previous.isNull() || !previous.deepEquivalent().anchorNode()->isDescendantOf(node);
-}
-
-bool isLastVisiblePositionInNode(const VisiblePosition& visiblePosition, const ContainerNode* node)
-{
-    if (visiblePosition.isNull())
-        return false;
-
-    if (!visiblePosition.deepEquivalent().computeContainerNode()->isDescendantOf(node))
-        return false;
-
-    VisiblePosition next = visiblePosition.next();
-    return next.isNull() || !next.deepEquivalent().anchorNode()->isDescendantOf(node);
-}
-
-} // namespace
-
-BreakBlockquoteCommand::BreakBlockquoteCommand(Document& document)
-    : CompositeEditCommand(document)
-{
-}
-
-void BreakBlockquoteCommand::doApply()
-{
-    if (endingSelection().isNone())
-        return;
-
-    // Delete the current selection.
-    if (endingSelection().isRange())
-        deleteSelection(false, false);
-
-    // This is a scenario that should never happen, but we want to
-    // make sure we don't dereference a null pointer below.
-
-    ASSERT(!endingSelection().isNone());
-
-    if (endingSelection().isNone())
-        return;
-
-    VisiblePosition visiblePos = endingSelection().visibleStart();
-
-    // pos is a position equivalent to the caret.  We use downstream() so that pos will
-    // be in the first node that we need to move (there are a few exceptions to this, see below).
-    Position pos = endingSelection().start().downstream();
-
-    // Find the top-most blockquote from the start.
-    HTMLQuoteElement* topBlockquote = toHTMLQuoteElement(highestEnclosingNodeOfType(pos, isMailHTMLBlockquoteElement));
-    if (!topBlockquote || !topBlockquote->parentNode())
-        return;
-
-    RefPtrWillBeRawPtr<HTMLBRElement> breakElement = createBreakElement(document());
-
-    bool isLastVisPosInNode = isLastVisiblePositionInNode(visiblePos, topBlockquote);
-
-    // If the position is at the beginning of the top quoted content, we don't need to break the quote.
-    // Instead, insert the break before the blockquote, unless the position is as the end of the the quoted content.
-    if (isFirstVisiblePositionInNode(visiblePos, topBlockquote) && !isLastVisPosInNode) {
-        insertNodeBefore(breakElement.get(), topBlockquote);
-        setEndingSelection(VisibleSelection(positionBeforeNode(breakElement.get()), DOWNSTREAM, endingSelection().isDirectional()));
-        rebalanceWhitespace();
-        return;
-    }
-
-    // Insert a break after the top blockquote.
-    insertNodeAfter(breakElement.get(), topBlockquote);
-
-    // If we're inserting the break at the end of the quoted content, we don't need to break the quote.
-    if (isLastVisPosInNode) {
-        setEndingSelection(VisibleSelection(positionBeforeNode(breakElement.get()), DOWNSTREAM, endingSelection().isDirectional()));
-        rebalanceWhitespace();
-        return;
-    }
-
-    // Don't move a line break just after the caret.  Doing so would create an extra, empty paragraph
-    // in the new blockquote.
-    if (lineBreakExistsAtVisiblePosition(visiblePos))
-        pos = pos.next();
-
-    // Adjust the position so we don't split at the beginning of a quote.
-    while (isFirstVisiblePositionInNode(VisiblePosition(pos), toHTMLQuoteElement(enclosingNodeOfType(pos, isMailHTMLBlockquoteElement))))
-        pos = pos.previous();
-
-    // startNode is the first node that we need to move to the new blockquote.
-    Node* startNode = pos.anchorNode();
-    ASSERT(startNode);
-
-    // Split at pos if in the middle of a text node.
-    if (startNode->isTextNode()) {
-        Text* textNode = toText(startNode);
-        int textOffset = pos.computeOffsetInContainerNode();
-        if ((unsigned)textOffset >= textNode->length()) {
-            startNode = NodeTraversal::next(*startNode);
-            ASSERT(startNode);
-        } else if (textOffset > 0) {
-            splitTextNode(textNode, textOffset);
-        }
-    } else if (pos.computeEditingOffset() > 0) {
-        Node* childAtOffset = NodeTraversal::childAt(*startNode, pos.computeEditingOffset());
-        startNode = childAtOffset ? childAtOffset : NodeTraversal::next(*startNode);
-        ASSERT(startNode);
-    }
-
-    // If there's nothing inside topBlockquote to move, we're finished.
-    if (!startNode->isDescendantOf(topBlockquote)) {
-        setEndingSelection(VisibleSelection(VisiblePosition(firstPositionInOrBeforeNode(startNode)), endingSelection().isDirectional()));
-        return;
-    }
-
-    // Build up list of ancestors in between the start node and the top blockquote.
-    WillBeHeapVector<RefPtrWillBeMember<Element>> ancestors;
-    for (Element* node = startNode->parentElement(); node && node != topBlockquote; node = node->parentElement())
-        ancestors.append(node);
-
-    // Insert a clone of the top blockquote after the break.
-    RefPtrWillBeRawPtr<Element> clonedBlockquote = topBlockquote->cloneElementWithoutChildren();
-    insertNodeAfter(clonedBlockquote.get(), breakElement.get());
-
-    // Clone startNode's ancestors into the cloned blockquote.
-    // On exiting this loop, clonedAncestor is the lowest ancestor
-    // that was cloned (i.e. the clone of either ancestors.last()
-    // or clonedBlockquote if ancestors is empty).
-    RefPtrWillBeRawPtr<Element> clonedAncestor = clonedBlockquote;
-    for (size_t i = ancestors.size(); i != 0; --i) {
-        RefPtrWillBeRawPtr<Element> clonedChild = ancestors[i - 1]->cloneElementWithoutChildren();
-        // Preserve list item numbering in cloned lists.
-        if (isHTMLOListElement(*clonedChild)) {
-            Node* listChildNode = i > 1 ? ancestors[i - 2].get() : startNode;
-            // The first child of the cloned list might not be a list item element,
-            // find the first one so that we know where to start numbering.
-            while (listChildNode && !isHTMLLIElement(*listChildNode))
-                listChildNode = listChildNode->nextSibling();
-            if (isListItem(listChildNode))
-                setNodeAttribute(clonedChild, startAttr, AtomicString::number(toLayoutListItem(listChildNode->layoutObject())->value()));
-        }
-
-        appendNode(clonedChild.get(), clonedAncestor.get());
-        clonedAncestor = clonedChild;
-    }
-
-    moveRemainingSiblingsToNewParent(startNode, 0, clonedAncestor);
-
-    if (!ancestors.isEmpty()) {
-        // Split the tree up the ancestor chain until the topBlockquote
-        // Throughout this loop, clonedParent is the clone of ancestor's parent.
-        // This is so we can clone ancestor's siblings and place the clones
-        // into the clone corresponding to the ancestor's parent.
-        RefPtrWillBeRawPtr<Element> ancestor = nullptr;
-        RefPtrWillBeRawPtr<Element> clonedParent = nullptr;
-        for (ancestor = ancestors.first(), clonedParent = clonedAncestor->parentElement();
-            ancestor && ancestor != topBlockquote;
-            ancestor = ancestor->parentElement(), clonedParent = clonedParent->parentElement())
-            moveRemainingSiblingsToNewParent(ancestor->nextSibling(), 0, clonedParent);
-
-        // If the startNode's original parent is now empty, remove it
-        Element* originalParent = ancestors.first().get();
-        if (!originalParent->hasChildren())
-            removeNode(originalParent);
-    }
-
-    // Make sure the cloned block quote renders.
-    addBlockPlaceholderIfNeeded(clonedBlockquote.get());
-
-    // Put the selection right before the break.
-    setEndingSelection(VisibleSelection(positionBeforeNode(breakElement.get()), DOWNSTREAM, endingSelection().isDirectional()));
-    rebalanceWhitespace();
-}
-
-} // namespace blink