--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/editing/FormatBlockCommand.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 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 "Element.h"
+#include "FormatBlockCommand.h"
+#include "Document.h"
+#include "htmlediting.h"
+#include "HTMLElement.h"
+#include "HTMLNames.h"
+#include "visible_units.h"
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+FormatBlockCommand::FormatBlockCommand(Document* document, const AtomicString& tagName) 
+    : CompositeEditCommand(document), m_tagName(tagName)
+{
+}
+
+bool FormatBlockCommand::modifyRange()
+{
+    ASSERT(endingSelection().isRange());
+    VisiblePosition visibleStart = endingSelection().visibleStart();
+    VisiblePosition visibleEnd = endingSelection().visibleEnd();
+    VisiblePosition startOfLastParagraph = startOfParagraph(visibleEnd);
+    
+    if (startOfParagraph(visibleStart) == startOfLastParagraph)
+        return false;
+
+    setEndingSelection(visibleStart);
+    doApply();
+    visibleStart = endingSelection().visibleStart();
+    VisiblePosition nextParagraph = endOfParagraph(visibleStart).next();
+    while (nextParagraph.isNotNull() && nextParagraph != startOfLastParagraph) {
+        setEndingSelection(nextParagraph);
+        doApply();
+        nextParagraph = endOfParagraph(endingSelection().visibleStart()).next();
+    }
+    setEndingSelection(visibleEnd);
+    doApply();
+    visibleEnd = endingSelection().visibleEnd();
+    setEndingSelection(VisibleSelection(visibleStart.deepEquivalent(), visibleEnd.deepEquivalent(), DOWNSTREAM));
+
+    return true;
+}
+
+void FormatBlockCommand::doApply()
+{
+    if (endingSelection().isNone())
+        return;
+    
+    if (!endingSelection().rootEditableElement())
+        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 FormatBlock
+    // 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))
+        setEndingSelection(VisibleSelection(visibleStart, visibleEnd.previous(true)));
+
+    if (endingSelection().isRange() && modifyRange())
+        return;
+
+    ExceptionCode ec;
+    String localName, prefix;
+    if (!Document::parseQualifiedName(m_tagName, prefix, localName, ec))
+        return;
+    QualifiedName qTypeOfBlock(prefix, localName, xhtmlNamespaceURI);
+
+    Node* refNode = enclosingBlockFlowElement(endingSelection().visibleStart());
+    if (refNode->hasTagName(qTypeOfBlock))
+        // We're already in a block with the format we want, so we don't have to do anything
+        return;
+    
+    VisiblePosition paragraphStart = startOfParagraph(endingSelection().visibleStart());
+    VisiblePosition paragraphEnd = endOfParagraph(endingSelection().visibleStart());
+    VisiblePosition blockStart = startOfBlock(endingSelection().visibleStart());
+    VisiblePosition blockEnd = endOfBlock(endingSelection().visibleStart());
+    RefPtr<Element> blockNode = createHTMLElement(document(), m_tagName);
+    RefPtr<Element> placeholder = createBreakElement(document());
+    
+    Node* root = endingSelection().start().node()->rootEditableElement();
+    if (validBlockTag(refNode->nodeName().lower()) && 
+        paragraphStart == blockStart && paragraphEnd == blockEnd && 
+        refNode != root && !root->isDescendantOf(refNode))
+        // Already in a valid block tag that only contains the current paragraph, so we can swap with the new tag
+        insertNodeBefore(blockNode, refNode);
+    else {
+        // Avoid inserting inside inline elements that surround paragraphStart with upstream().
+        // This is only to avoid creating bloated markup.
+        insertNodeAt(blockNode, paragraphStart.deepEquivalent().upstream());
+    }
+    appendNode(placeholder, blockNode);
+    
+    VisiblePosition destination(Position(placeholder.get(), 0));
+    if (paragraphStart == paragraphEnd && !lineBreakExistsAtVisiblePosition(paragraphStart)) {
+        setEndingSelection(destination);
+        return;
+    }
+    moveParagraph(paragraphStart, paragraphEnd, destination, true, false);
+}
+
+}