markup.cpp

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            } else {
                preMarkups.append(getStartMarkup(ancestor, updatedRange.get(), annotate, convertBlocksToInlines));
                markups.append(getEndMarkup(ancestor));
            }
            if (nodes)
                nodes->append(ancestor);
            
            lastClosed = ancestor;
            
            if (ancestor == specialCommonAncestor)
                break;
        }
    }
    
    DEFINE_STATIC_LOCAL(const String, styleSpanOpen, ("<span class=\"" AppleStyleSpanClass "\" style=\""));
    DEFINE_STATIC_LOCAL(const String, styleSpanClose, ("</span>"));
    
    // Add a wrapper span with the styles that all of the nodes in the markup inherit.
    Node* parentOfLastClosed = lastClosed ? lastClosed->parentNode() : 0;
    if (parentOfLastClosed && parentOfLastClosed->renderer()) {
        RefPtr<CSSMutableStyleDeclaration> style = computedStyle(parentOfLastClosed)->copyInheritableProperties();

        // Styles that Mail blockquotes contribute should only be placed on the Mail blockquote, to help
        // us differentiate those styles from ones that the user has applied.  This helps us
        // get the color of content pasted into blockquotes right.
        removeEnclosingMailBlockquoteStyle(style.get(), parentOfLastClosed);
        
        // Document default styles will be added on another wrapper span.
        removeDefaultStyles(style.get(), document);
        
        // Since we are converting blocks to inlines, remove any inherited block properties that are in the style.
        // This cuts out meaningless properties and prevents properties from magically affecting blocks later
        // if the style is cloned for a new block element during a future editing operation.
        if (convertBlocksToInlines)
            style->removeBlockProperties();

        if (style->length() > 0) {
            Vector<UChar> openTag;
            append(openTag, styleSpanOpen);
            appendAttributeValue(openTag, style->cssText(), documentIsHTML);
            openTag.append('\"');
            openTag.append('>');
            preMarkups.append(String::adopt(openTag));
            
            markups.append(styleSpanClose);
        }
    }
    
    if (lastClosed && lastClosed != document->documentElement()) {
        // Add a style span with the document's default styles.  We add these in a separate
        // span so that at paste time we can differentiate between document defaults and user
        // applied styles.
        RefPtr<CSSMutableStyleDeclaration> defaultStyle = computedStyle(document->documentElement())->copyInheritableProperties();
        
        if (defaultStyle->length() > 0) {
            Vector<UChar> openTag;
            append(openTag, styleSpanOpen);
            appendAttributeValue(openTag, defaultStyle->cssText(), documentIsHTML);
            openTag.append('\"');
            openTag.append('>');
            preMarkups.append(String::adopt(openTag));
            markups.append(styleSpanClose);
        }
    }

    // FIXME: The interchange newline should be placed in the block that it's in, not after all of the content, unconditionally.
    if (annotate && needInterchangeNewlineAfter(visibleEnd.previous()))
        markups.append(interchangeNewlineString);
    
    if (deleteButton)
        deleteButton->enable();

    return joinMarkups(preMarkups, markups);
}

PassRefPtr<DocumentFragment> createFragmentFromMarkup(Document* document, const String& markup, const String& baseURL)
{
    ASSERT(document->documentElement()->isHTMLElement());
    // FIXME: What if the document element is not an HTML element?
    HTMLElement *element = static_cast<HTMLElement*>(document->documentElement());

    RefPtr<DocumentFragment> fragment = element->createContextualFragment(markup);

    if (fragment && !baseURL.isEmpty() && baseURL != blankURL() && baseURL != document->baseURL())
        completeURLs(fragment.get(), baseURL);

    return fragment.release();
}

String createMarkup(const Node* node, EChildrenOnly includeChildren, Vector<Node*>* nodes)
{
    Vector<UChar> result;

    if (!node)
        return "";

    Document* document = node->document();
    Frame* frame = document->frame();
    DeleteButtonController* deleteButton = frame ? frame->editor()->deleteButtonController() : 0;

    // disable the delete button so it's elements are not serialized into the markup
    if (deleteButton) {
        if (node->isDescendantOf(deleteButton->containerElement()))
            return "";
        deleteButton->disable();
    }

    appendMarkup(result, const_cast<Node*>(node), includeChildren, nodes);

    if (deleteButton)
        deleteButton->enable();

    return String::adopt(result);
}

static void fillContainerFromString(ContainerNode* paragraph, const String& string)
{
    Document* document = paragraph->document();

    ExceptionCode ec = 0;
    if (string.isEmpty()) {
        paragraph->appendChild(createBlockPlaceholderElement(document), ec);
        ASSERT(ec == 0);
        return;
    }

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

    Vector<String> tabList;
    string.split('\t', true, tabList);
    String tabText = "";
    bool first = true;
    size_t numEntries = tabList.size();
    for (size_t i = 0; i < numEntries; ++i) {
        const String& s = tabList[i];

        // append the non-tab textual part
        if (!s.isEmpty()) {
            if (!tabText.isEmpty()) {
                paragraph->appendChild(createTabSpanElement(document, tabText), ec);
                ASSERT(ec == 0);
                tabText = "";
            }
            RefPtr<Node> textNode = document->createTextNode(stringWithRebalancedWhitespace(s, first, i + 1 == numEntries));
            paragraph->appendChild(textNode.release(), ec);
            ASSERT(ec == 0);
        }

        // there is a tab after every entry, except the last entry
        // (if the last character is a tab, the list gets an extra empty entry)
        if (i + 1 != numEntries)
            tabText.append('\t');
        else if (!tabText.isEmpty()) {
            paragraph->appendChild(createTabSpanElement(document, tabText), ec);
            ASSERT(ec == 0);
        }
        
        first = false;
    }
}

PassRefPtr<DocumentFragment> createFragmentFromText(Range* context, const String& text)
{
    if (!context)
        return 0;

    Node* styleNode = context->firstNode();
    if (!styleNode) {
        styleNode = context->startPosition().node();
        if (!styleNode)
            return 0;
    }

    Document* document = styleNode->document();
    RefPtr<DocumentFragment> fragment = document->createDocumentFragment();
    
    if (text.isEmpty())
        return fragment.release();

    String string = text;
    string.replace("\r\n", "\n");
    string.replace('\r', '\n');

    ExceptionCode ec = 0;
    RenderObject* renderer = styleNode->renderer();
    if (renderer && renderer->style()->preserveNewline()) {
        fragment->appendChild(document->createTextNode(string), ec);
        ASSERT(ec == 0);
        if (string.endsWith("\n")) {
            RefPtr<Element> element = createBreakElement(document);
            element->setAttribute(classAttr, AppleInterchangeNewline);            
            fragment->appendChild(element.release(), ec);
            ASSERT(ec == 0);
        }
        return fragment.release();
    }

    // A string with no newlines gets added inline, rather than being put into a paragraph.
    if (string.find('\n') == -1) {
        fillContainerFromString(fragment.get(), string);
        return fragment.release();
    }

    // Break string into paragraphs. Extra line breaks turn into empty paragraphs.
    Node* blockNode = enclosingBlock(context->firstNode());
    Element* block = static_cast<Element*>(blockNode);
    bool useClonesOfEnclosingBlock = blockNode
        && blockNode->isElementNode()
        && !block->hasTagName(bodyTag)
        && !block->hasTagName(htmlTag)
        && block != editableRootForPosition(context->startPosition());
    
    Vector<String> list;
    string.split('\n', true, list); // true gets us empty strings in the list
    size_t numLines = list.size();
    for (size_t i = 0; i < numLines; ++i) {
        const String& s = list[i];

        RefPtr<Element> element;
        if (s.isEmpty() && i + 1 == numLines) {
            // For last line, use the "magic BR" rather than a P.
            element = createBreakElement(document);
            element->setAttribute(classAttr, AppleInterchangeNewline);            
        } else {
            if (useClonesOfEnclosingBlock)
                element = block->cloneElement();
            else
                element = createDefaultParagraphElement(document);
            fillContainerFromString(element.get(), s);
        }
        fragment->appendChild(element.release(), ec);
        ASSERT(ec == 0);
    }
    return fragment.release();
}

PassRefPtr<DocumentFragment> createFragmentFromNodes(Document *document, const Vector<Node*>& nodes)
{
    if (!document)
        return 0;

    // disable the delete button so it's elements are not serialized into the markup
    if (document->frame())
        document->frame()->editor()->deleteButtonController()->disable();

    RefPtr<DocumentFragment> fragment = document->createDocumentFragment();

    ExceptionCode ec = 0;
    size_t size = nodes.size();
    for (size_t i = 0; i < size; ++i) {
        RefPtr<Element> element = createDefaultParagraphElement(document);
        element->appendChild(nodes[i], ec);
        ASSERT(ec == 0);
        fragment->appendChild(element.release(), ec);
        ASSERT(ec == 0);
    }

    if (document->frame())
        document->frame()->editor()->deleteButtonController()->enable();

    return fragment.release();
}

String createFullMarkup(const Node* node)
{
    if (!node)
        return String();
        
    Document* document = node->document();
    if (!document)
        return String();
        
    Frame* frame = document->frame();
    if (!frame)
        return String();

    // FIXME: This is never "for interchange". Is that right?    
    String markupString = createMarkup(node, IncludeNode, 0);
    Node::NodeType nodeType = node->nodeType();
    if (nodeType != Node::DOCUMENT_NODE && nodeType != Node::DOCUMENT_TYPE_NODE)
        markupString = frame->documentTypeString() + markupString;

    return markupString;
}

String createFullMarkup(const Range* range)
{
    if (!range)
        return String();

    Node* node = range->startContainer();
    if (!node)
        return String();
        
    Document* document = node->document();
    if (!document)
        return String();
        
    Frame* frame = document->frame();
    if (!frame)
        return String();

    // FIXME: This is always "for interchange". Is that right? See the previous method.
    return frame->documentTypeString() + createMarkup(range, 0, AnnotateForInterchange);        
}

}