webkit/src/WebCore/editing/InsertTextCommand.cpp - toolchain/benchmark - Git at Google

 /*
  * 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 "InsertTextCommand.h"

 #include "CharacterNames.h"
 #include "CSSComputedStyleDeclaration.h"
 #include "CSSMutableStyleDeclaration.h"
 #include "CSSPropertyNames.h"
 #include "Document.h"
 #include "Element.h"
 #include "EditingText.h"
 #include "Editor.h"
 #include "Frame.h"
 #include "Logging.h"
 #include "HTMLInterchange.h"
 #include "htmlediting.h"
 #include "TextIterator.h"
 #include "TypingCommand.h"
 #include "visible_units.h"

 namespace WebCore {

 InsertTextCommand::InsertTextCommand(Document *document)
     : CompositeEditCommand(document), m_charactersAdded(0)
 {
 }

 void InsertTextCommand::doApply()
 {
 }

 Position InsertTextCommand::prepareForTextInsertion(const Position& p)
 {
     Position pos = p;
     // Prepare for text input by looking at the specified position.
     // It may be necessary to insert a text node to receive characters.
     if (!pos.node()->isTextNode()) {
         RefPtr<Node> textNode = document()->createEditingTextNode("");
         insertNodeAt(textNode.get(), pos);
         return Position(textNode.get(), 0);
     }

     if (isTabSpanTextNode(pos.node())) {
         RefPtr<Node> textNode = document()->createEditingTextNode("");
         insertNodeAtTabSpanPosition(textNode.get(), pos);
         return Position(textNode.get(), 0);
     }

     return pos;
 }

 // This avoids the expense of a full fledged delete operation, and avoids a layout that typically results
 // from text removal.
 bool InsertTextCommand::performTrivialReplace(const String& text, bool selectInsertedText)
 {
     if (!endingSelection().isRange())
         return false;

     if (text.contains('\t') || text.contains(' ') || text.contains('\n'))
         return false;

     Position start = endingSelection().start();
     Position end = endingSelection().end();

     if (start.node() != end.node() || !start.node()->isTextNode() || isTabSpanTextNode(start.node()))
         return false;

     replaceTextInNode(static_cast<Text*>(start.node()), start.deprecatedEditingOffset(), end.deprecatedEditingOffset() - start.deprecatedEditingOffset(), text);

     Position endPosition(start.node(), start.deprecatedEditingOffset() + text.length());

     // We could have inserted a part of composed character sequence,
     // so we are basically treating ending selection as a range to avoid validation.
     // <http://bugs.webkit.org/show_bug.cgi?id=15781>
     VisibleSelection forcedEndingSelection;
     forcedEndingSelection.setWithoutValidation(start, endPosition);
     setEndingSelection(forcedEndingSelection);

     if (!selectInsertedText)
         setEndingSelection(VisibleSelection(endingSelection().visibleEnd()));

     return true;
 }

 void InsertTextCommand::input(const String& text, bool selectInsertedText)
 {

     ASSERT(text.find('\n') == -1);

     if (endingSelection().isNone())
         return;

     // Delete the current selection.
     // FIXME: This delete operation blows away the typing style.
     if (endingSelection().isRange()) {
         if (performTrivialReplace(text, selectInsertedText))
             return;
         deleteSelection(false, true, true, false);
     }

     Position startPosition(endingSelection().start());

     Position placeholder;
     // We want to remove preserved newlines and brs that will collapse (and thus become unnecessary) when content
     // is inserted just before them.
     // FIXME: We shouldn't really have to do this, but removing placeholders is a workaround for 9661.
     // If the caret is just before a placeholder, downstream will normalize the caret to it.
     Position downstream(startPosition.downstream());
     if (lineBreakExistsAtPosition(downstream)) {
         // FIXME: This doesn't handle placeholders at the end of anonymous blocks.
         VisiblePosition caret(startPosition);
         if (isEndOfBlock(caret) && isStartOfParagraph(caret))
             placeholder = downstream;
         // Don't remove the placeholder yet, otherwise the block we're inserting into would collapse before
         // we get a chance to insert into it.  We check for a placeholder now, though, because doing so requires
         // the creation of a VisiblePosition, and if we did that post-insertion it would force a layout.
     }

     // Insert the character at the leftmost candidate.
     startPosition = startPosition.upstream();

     // It is possible for the node that contains startPosition to contain only unrendered whitespace,
     // and so deleteInsignificantText could remove it.  Save the position before the node in case that happens.
     Position positionBeforeStartNode(positionInParentBeforeNode(startPosition.node()));
     deleteInsignificantText(startPosition.upstream(), startPosition.downstream());
     if (!startPosition.node()->inDocument())
         startPosition = positionBeforeStartNode;
     if (!startPosition.isCandidate())
         startPosition = startPosition.downstream();

     startPosition = positionAvoidingSpecialElementBoundary(startPosition);

     Position endPosition;

     if (text == "\t") {
         endPosition = insertTab(startPosition);
         startPosition = endPosition.previous();
         if (placeholder.isNotNull())
             removePlaceholderAt(placeholder);
         m_charactersAdded += 1;
     } else {
         // Make sure the document is set up to receive text
         startPosition = prepareForTextInsertion(startPosition);
         if (placeholder.isNotNull())
             removePlaceholderAt(placeholder);
         Text *textNode = static_cast<Text *>(startPosition.node());
         int offset = startPosition.deprecatedEditingOffset();

         insertTextIntoNode(textNode, offset, text);
         endPosition = Position(textNode, offset + text.length());

         // The insertion may require adjusting adjacent whitespace, if it is present.
         rebalanceWhitespaceAt(endPosition);
         // Rebalancing on both sides isn't necessary if we've inserted a space.
         if (text != " ")
             rebalanceWhitespaceAt(startPosition);

         m_charactersAdded += text.length();
     }

     // We could have inserted a part of composed character sequence,
     // so we are basically treating ending selection as a range to avoid validation.
     // <http://bugs.webkit.org/show_bug.cgi?id=15781>
     VisibleSelection forcedEndingSelection;
     forcedEndingSelection.setWithoutValidation(startPosition, endPosition);
     setEndingSelection(forcedEndingSelection);

     // Handle the case where there is a typing style.
     CSSMutableStyleDeclaration* typingStyle = document()->frame()->typingStyle();
     RefPtr<CSSComputedStyleDeclaration> endingStyle = endPosition.computedStyle();
     RefPtr<CSSValue> unicodeBidi;
     RefPtr<CSSValue> direction;
     if (typingStyle) {
         unicodeBidi = typingStyle->getPropertyCSSValue(CSSPropertyUnicodeBidi);
         direction = typingStyle->getPropertyCSSValue(CSSPropertyDirection);
     }
     endingStyle->diff(typingStyle);
     if (typingStyle && unicodeBidi) {
         ASSERT(unicodeBidi->isPrimitiveValue());
         typingStyle->setProperty(CSSPropertyUnicodeBidi, static_cast<CSSPrimitiveValue*>(unicodeBidi.get())->getIdent());
         if (direction) {
             ASSERT(direction->isPrimitiveValue());
             typingStyle->setProperty(CSSPropertyDirection, static_cast<CSSPrimitiveValue*>(direction.get())->getIdent());
         }
     }

     if (typingStyle && typingStyle->length())
         applyStyle(typingStyle);

     if (!selectInsertedText)
         setEndingSelection(VisibleSelection(endingSelection().end(), endingSelection().affinity()));
 }

 Position InsertTextCommand::insertTab(const Position& pos)
 {
     Position insertPos = VisiblePosition(pos, DOWNSTREAM).deepEquivalent();

     Node *node = insertPos.node();
     unsigned int offset = insertPos.deprecatedEditingOffset();

     // keep tabs coalesced in tab span
     if (isTabSpanTextNode(node)) {
         insertTextIntoNode(static_cast<Text *>(node), offset, "\t");
         return Position(node, offset + 1);
     }

     // create new tab span
     RefPtr<Element> spanNode = createTabSpanElement(document());

     // place it
     if (!node->isTextNode()) {
         insertNodeAt(spanNode.get(), insertPos);
     } else {
         Text *textNode = static_cast<Text *>(node);
         if (offset >= textNode->length()) {
             insertNodeAfter(spanNode.get(), textNode);
         } else {
             // split node to make room for the span
             // NOTE: splitTextNode uses textNode for the
             // second node in the split, so we need to
             // insert the span before it.
             if (offset > 0)
                 splitTextNode(textNode, offset);
             insertNodeBefore(spanNode, textNode);
         }
     }

     // return the position following the new tab
     return Position(spanNode->lastChild(), caretMaxOffset(spanNode->lastChild()));
 }

 bool InsertTextCommand::isInsertTextCommand() const
 {
     return true;
 }

 }
	/*
	* 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 "InsertTextCommand.h"

	#include "CharacterNames.h"
	#include "CSSComputedStyleDeclaration.h"
	#include "CSSMutableStyleDeclaration.h"
	#include "CSSPropertyNames.h"
	#include "Document.h"
	#include "Element.h"
	#include "EditingText.h"
	#include "Editor.h"
	#include "Frame.h"
	#include "Logging.h"
	#include "HTMLInterchange.h"
	#include "htmlediting.h"
	#include "TextIterator.h"
	#include "TypingCommand.h"
	#include "visible_units.h"

	namespace WebCore {

	InsertTextCommand::InsertTextCommand(Document *document)
	: CompositeEditCommand(document), m_charactersAdded(0)
	{
	}

	void InsertTextCommand::doApply()
	{
	}

	Position InsertTextCommand::prepareForTextInsertion(const Position& p)
	{
	Position pos = p;
	// Prepare for text input by looking at the specified position.
	// It may be necessary to insert a text node to receive characters.
	if (!pos.node()->isTextNode()) {
	RefPtr<Node> textNode = document()->createEditingTextNode("");
	insertNodeAt(textNode.get(), pos);
	return Position(textNode.get(), 0);
	}

	if (isTabSpanTextNode(pos.node())) {
	RefPtr<Node> textNode = document()->createEditingTextNode("");
	insertNodeAtTabSpanPosition(textNode.get(), pos);
	return Position(textNode.get(), 0);
	}

	return pos;
	}

	// This avoids the expense of a full fledged delete operation, and avoids a layout that typically results
	// from text removal.
	bool InsertTextCommand::performTrivialReplace(const String& text, bool selectInsertedText)
	{
	if (!endingSelection().isRange())
	return false;

	if (text.contains('\t') \|\| text.contains(' ') \|\| text.contains('\n'))
	return false;

	Position start = endingSelection().start();
	Position end = endingSelection().end();

	if (start.node() != end.node() \|\| !start.node()->isTextNode() \|\| isTabSpanTextNode(start.node()))
	return false;

	replaceTextInNode(static_cast<Text*>(start.node()), start.deprecatedEditingOffset(), end.deprecatedEditingOffset() - start.deprecatedEditingOffset(), text);

	Position endPosition(start.node(), start.deprecatedEditingOffset() + text.length());

	// We could have inserted a part of composed character sequence,
	// so we are basically treating ending selection as a range to avoid validation.
	// <http://bugs.webkit.org/show_bug.cgi?id=15781>
	VisibleSelection forcedEndingSelection;
	forcedEndingSelection.setWithoutValidation(start, endPosition);
	setEndingSelection(forcedEndingSelection);

	if (!selectInsertedText)
	setEndingSelection(VisibleSelection(endingSelection().visibleEnd()));

	return true;
	}

	void InsertTextCommand::input(const String& text, bool selectInsertedText)
	{

	ASSERT(text.find('\n') == -1);

	if (endingSelection().isNone())
	return;

	// Delete the current selection.
	// FIXME: This delete operation blows away the typing style.
	if (endingSelection().isRange()) {
	if (performTrivialReplace(text, selectInsertedText))
	return;
	deleteSelection(false, true, true, false);
	}

	Position startPosition(endingSelection().start());

	Position placeholder;
	// We want to remove preserved newlines and brs that will collapse (and thus become unnecessary) when content
	// is inserted just before them.
	// FIXME: We shouldn't really have to do this, but removing placeholders is a workaround for 9661.
	// If the caret is just before a placeholder, downstream will normalize the caret to it.
	Position downstream(startPosition.downstream());
	if (lineBreakExistsAtPosition(downstream)) {
	// FIXME: This doesn't handle placeholders at the end of anonymous blocks.
	VisiblePosition caret(startPosition);
	if (isEndOfBlock(caret) && isStartOfParagraph(caret))
	placeholder = downstream;
	// Don't remove the placeholder yet, otherwise the block we're inserting into would collapse before
	// we get a chance to insert into it. We check for a placeholder now, though, because doing so requires
	// the creation of a VisiblePosition, and if we did that post-insertion it would force a layout.
	}

	// Insert the character at the leftmost candidate.
	startPosition = startPosition.upstream();

	// It is possible for the node that contains startPosition to contain only unrendered whitespace,
	// and so deleteInsignificantText could remove it. Save the position before the node in case that happens.
	Position positionBeforeStartNode(positionInParentBeforeNode(startPosition.node()));
	deleteInsignificantText(startPosition.upstream(), startPosition.downstream());
	if (!startPosition.node()->inDocument())
	startPosition = positionBeforeStartNode;
	if (!startPosition.isCandidate())
	startPosition = startPosition.downstream();

	startPosition = positionAvoidingSpecialElementBoundary(startPosition);

	Position endPosition;

	if (text == "\t") {
	endPosition = insertTab(startPosition);
	startPosition = endPosition.previous();
	if (placeholder.isNotNull())
	removePlaceholderAt(placeholder);
	m_charactersAdded += 1;
	} else {
	// Make sure the document is set up to receive text
	startPosition = prepareForTextInsertion(startPosition);
	if (placeholder.isNotNull())
	removePlaceholderAt(placeholder);
	Text textNode = static_cast<Text >(startPosition.node());
	int offset = startPosition.deprecatedEditingOffset();

	insertTextIntoNode(textNode, offset, text);
	endPosition = Position(textNode, offset + text.length());

	// The insertion may require adjusting adjacent whitespace, if it is present.
	rebalanceWhitespaceAt(endPosition);
	// Rebalancing on both sides isn't necessary if we've inserted a space.
	if (text != " ")
	rebalanceWhitespaceAt(startPosition);

	m_charactersAdded += text.length();
	}

	// We could have inserted a part of composed character sequence,
	// so we are basically treating ending selection as a range to avoid validation.
	// <http://bugs.webkit.org/show_bug.cgi?id=15781>
	VisibleSelection forcedEndingSelection;
	forcedEndingSelection.setWithoutValidation(startPosition, endPosition);
	setEndingSelection(forcedEndingSelection);

	// Handle the case where there is a typing style.
	CSSMutableStyleDeclaration* typingStyle = document()->frame()->typingStyle();
	RefPtr<CSSComputedStyleDeclaration> endingStyle = endPosition.computedStyle();
	RefPtr<CSSValue> unicodeBidi;
	RefPtr<CSSValue> direction;
	if (typingStyle) {
	unicodeBidi = typingStyle->getPropertyCSSValue(CSSPropertyUnicodeBidi);
	direction = typingStyle->getPropertyCSSValue(CSSPropertyDirection);
	}
	endingStyle->diff(typingStyle);
	if (typingStyle && unicodeBidi) {
	ASSERT(unicodeBidi->isPrimitiveValue());
	typingStyle->setProperty(CSSPropertyUnicodeBidi, static_cast<CSSPrimitiveValue*>(unicodeBidi.get())->getIdent());
	if (direction) {
	ASSERT(direction->isPrimitiveValue());
	typingStyle->setProperty(CSSPropertyDirection, static_cast<CSSPrimitiveValue*>(direction.get())->getIdent());
	}
	}

	if (typingStyle && typingStyle->length())
	applyStyle(typingStyle);

	if (!selectInsertedText)
	setEndingSelection(VisibleSelection(endingSelection().end(), endingSelection().affinity()));
	}

	Position InsertTextCommand::insertTab(const Position& pos)
	{
	Position insertPos = VisiblePosition(pos, DOWNSTREAM).deepEquivalent();

	Node *node = insertPos.node();
	unsigned int offset = insertPos.deprecatedEditingOffset();

	// keep tabs coalesced in tab span
	if (isTabSpanTextNode(node)) {
	insertTextIntoNode(static_cast<Text *>(node), offset, "\t");
	return Position(node, offset + 1);
	}

	// create new tab span
	RefPtr<Element> spanNode = createTabSpanElement(document());

	// place it
	if (!node->isTextNode()) {
	insertNodeAt(spanNode.get(), insertPos);
	} else {
	Text textNode = static_cast<Text >(node);
	if (offset >= textNode->length()) {
	insertNodeAfter(spanNode.get(), textNode);
	} else {
	// split node to make room for the span
	// NOTE: splitTextNode uses textNode for the
	// second node in the split, so we need to
	// insert the span before it.
	if (offset > 0)
	splitTextNode(textNode, offset);
	insertNodeBefore(spanNode, textNode);
	}
	}

	// return the position following the new tab
	return Position(spanNode->lastChild(), caretMaxOffset(spanNode->lastChild()));
	}

	bool InsertTextCommand::isInsertTextCommand() const
	{
	return true;
	}

	}