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

Source/core/editing/InsertLineBreakCommand.cpp

-/*
- * Copyright (C) 2005, 2006 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/InsertLineBreakCommand.h"
-
-#include "core/HTMLNames.h"
-#include "core/dom/Document.h"
-#include "core/dom/Text.h"
-#include "core/editing/EditingStyle.h"
-#include "core/editing/EditingUtilities.h"
-#include "core/editing/FrameSelection.h"
-#include "core/editing/VisiblePosition.h"
-#include "core/editing/VisibleUnits.h"
-#include "core/frame/LocalFrame.h"
-#include "core/html/HTMLBRElement.h"
-#include "core/html/HTMLElement.h"
-#include "core/layout/LayoutObject.h"
-#include "core/layout/LayoutText.h"
-
-namespace blink {
-
-using namespace HTMLNames;
-
-InsertLineBreakCommand::InsertLineBreakCommand(Document& document)
-    : CompositeEditCommand(document)
-{
-}
-
-bool InsertLineBreakCommand::preservesTypingStyle() const
-{
-    return true;
-}
-
-// Whether we should insert a break element or a '\n'.
-bool InsertLineBreakCommand::shouldUseBreakElement(const Position& insertionPos)
-{
-    // An editing position like [input, 0] actually refers to the position before
-    // the input element, and in that case we need to check the input element's
-    // parent's layoutObject.
-    Position p(insertionPos.parentAnchoredEquivalent());
-    return p.anchorNode()->layoutObject() && !p.anchorNode()->layoutObject()->style()->preserveNewline();
-}
-
-void InsertLineBreakCommand::doApply()
-{
-    deleteSelection();
-    VisibleSelection selection = endingSelection();
-    if (!selection.isNonOrphanedCaretOrRange())
-        return;
-
-    VisiblePosition caret(selection.visibleStart());
-    // FIXME: If the node is hidden, we should still be able to insert text.
-    // For now, we return to avoid a crash.  https://bugs.webkit.org/show_bug.cgi?id=40342
-    if (caret.isNull())
-        return;
-
-    Position pos(caret.deepEquivalent());
-
-    pos = positionAvoidingSpecialElementBoundary(pos);
-
-    pos = positionOutsideTabSpan(pos);
-
-    RefPtrWillBeRawPtr<Node> nodeToInsert = nullptr;
-    if (shouldUseBreakElement(pos))
-        nodeToInsert = createBreakElement(document());
-    else
-        nodeToInsert = document().createTextNode("\n");
-
-    // FIXME: Need to merge text nodes when inserting just after or before text.
-
-    if (isEndOfParagraph(caret) && !lineBreakExistsAtVisiblePosition(caret)) {
-        bool needExtraLineBreak = !isHTMLHRElement(*pos.anchorNode()) && !isHTMLTableElement(*pos.anchorNode());
-
-        insertNodeAt(nodeToInsert.get(), pos);
-
-        if (needExtraLineBreak)
-            insertNodeBefore(nodeToInsert->cloneNode(false), nodeToInsert);
-
-        VisiblePosition endingPosition(positionBeforeNode(nodeToInsert.get()));
-        setEndingSelection(VisibleSelection(endingPosition, endingSelection().isDirectional()));
-    } else if (pos.computeEditingOffset() <= caretMinOffset(pos.anchorNode())) {
-        insertNodeAt(nodeToInsert.get(), pos);
-
-        // Insert an extra br or '\n' if the just inserted one collapsed.
-        if (!isStartOfParagraph(VisiblePosition(positionBeforeNode(nodeToInsert.get()))))
-            insertNodeBefore(nodeToInsert->cloneNode(false).get(), nodeToInsert.get());
-
-        setEndingSelection(VisibleSelection(positionInParentAfterNode(*nodeToInsert), DOWNSTREAM, endingSelection().isDirectional()));
-    // If we're inserting after all of the rendered text in a text node, or into a non-text node,
-    // a simple insertion is sufficient.
-    } else if (!pos.anchorNode()->isTextNode() || pos.computeOffsetInContainerNode() >= caretMaxOffset(pos.anchorNode())) {
-        insertNodeAt(nodeToInsert.get(), pos);
-        setEndingSelection(VisibleSelection(positionInParentAfterNode(*nodeToInsert), DOWNSTREAM, endingSelection().isDirectional()));
-    } else if (pos.anchorNode()->isTextNode()) {
-        // Split a text node
-        Text* textNode = toText(pos.anchorNode());
-        splitTextNode(textNode, pos.computeOffsetInContainerNode());
-        insertNodeBefore(nodeToInsert, textNode);
-        Position endingPosition = firstPositionInNode(textNode);
-
-        // Handle whitespace that occurs after the split
-        document().updateLayoutIgnorePendingStylesheets();
-        if (!endingPosition.isRenderedCharacter()) {
-            Position positionBeforeTextNode(positionInParentBeforeNode(*textNode));
-            // Clear out all whitespace and insert one non-breaking space
-            deleteInsignificantTextDownstream(endingPosition);
-            ASSERT(!textNode->layoutObject() || textNode->layoutObject()->style()->collapseWhiteSpace());
-            // Deleting insignificant whitespace will remove textNode if it contains nothing but insignificant whitespace.
-            if (textNode->inDocument()) {
-                insertTextIntoNode(textNode, 0, nonBreakingSpaceString());
-            } else {
-                RefPtrWillBeRawPtr<Text> nbspNode = document().createTextNode(nonBreakingSpaceString());
-                insertNodeAt(nbspNode.get(), positionBeforeTextNode);
-                endingPosition = firstPositionInNode(nbspNode.get());
-            }
-        }
-
-        setEndingSelection(VisibleSelection(endingPosition, DOWNSTREAM, endingSelection().isDirectional()));
-    }
-
-    // Handle the case where there is a typing style.
-
-    RefPtrWillBeRawPtr<EditingStyle> typingStyle = document().frame()->selection().typingStyle();
-
-    if (typingStyle && !typingStyle->isEmpty()) {
-        // Apply the typing style to the inserted line break, so that if the selection
-        // leaves and then comes back, new input will have the right style.
-        // FIXME: We shouldn't always apply the typing style to the line break here,
-        // see <rdar://problem/5794462>.
-        applyStyle(typingStyle.get(), firstPositionInOrBeforeNode(nodeToInsert.get()), lastPositionInOrAfterNode(nodeToInsert.get()));
-        // Even though this applyStyle operates on a Range, it still sets an endingSelection().
-        // It tries to set a VisibleSelection around the content it operated on. So, that VisibleSelection
-        // will either (a) select the line break we inserted, or it will (b) be a caret just
-        // before the line break (if the line break is at the end of a block it isn't selectable).
-        // So, this next call sets the endingSelection() to a caret just after the line break
-        // that we inserted, or just before it if it's at the end of a block.
-        setEndingSelection(endingSelection().visibleEnd());
-    }
-
-    rebalanceWhitespace();
-}
-
-}