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webkit / WebKit / refs/heads/safari-4-branch / . / WebCore / editing / markup.cpp
blob: d6fe1cea10d001d71ef84bfdb0a58c6465b99827 [file] [log] [blame]
/*
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple 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 "markup.h"
#include "CDATASection.h"
#include "CharacterNames.h"
#include "Comment.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSMutableStyleDeclaration.h"
#include "CSSPrimitiveValue.h"
#include "CSSProperty.h"
#include "CSSPropertyNames.h"
#include "CSSRule.h"
#include "CSSRuleList.h"
#include "CSSStyleRule.h"
#include "CSSStyleSelector.h"
#include "CSSValue.h"
#include "CSSValueKeywords.h"
#include "DeleteButtonController.h"
#include "Document.h"
#include "DocumentFragment.h"
#include "DocumentType.h"
#include "Editor.h"
#include "Frame.h"
#include "HTMLElement.h"
#include "HTMLNames.h"
#include "InlineTextBox.h"
#include "Logging.h"
#include "ProcessingInstruction.h"
#include "QualifiedName.h"
#include "Range.h"
#include "VisibleSelection.h"
#include "TextIterator.h"
#include "htmlediting.h"
#include "visible_units.h"
#include <wtf/StdLibExtras.h>
using namespace std;
namespace WebCore {
using namespace HTMLNames;
static inline bool shouldSelfClose(const Node *node);
class AttributeChange {
public:
AttributeChange()
: m_name(nullAtom, nullAtom, nullAtom)
{
}
AttributeChange(PassRefPtr<Element> element, const QualifiedName& name, const String& value)
: m_element(element), m_name(name), m_value(value)
{
}
void apply()
{
m_element->setAttribute(m_name, m_value);
}
private:
RefPtr<Element> m_element;
QualifiedName m_name;
String m_value;
};
static void appendAttributeValue(Vector<UChar>& result, const String& attr, bool escapeNBSP)
{
const UChar* uchars = attr.characters();
unsigned len = attr.length();
unsigned lastCopiedFrom = 0;
DEFINE_STATIC_LOCAL(const String, ampEntity, ("&amp;"));
DEFINE_STATIC_LOCAL(const String, gtEntity, ("&gt;"));
DEFINE_STATIC_LOCAL(const String, ltEntity, ("&lt;"));
DEFINE_STATIC_LOCAL(const String, quotEntity, ("&quot;"));
DEFINE_STATIC_LOCAL(const String, nbspEntity, ("&nbsp;"));
for (unsigned i = 0; i < len; ++i) {
UChar c = uchars[i];
switch (c) {
case '&':
result.append(uchars + lastCopiedFrom, i - lastCopiedFrom);
append(result, ampEntity);
lastCopiedFrom = i + 1;
break;
case '<':
result.append(uchars + lastCopiedFrom, i - lastCopiedFrom);
append(result, ltEntity);
lastCopiedFrom = i + 1;
break;
case '>':
result.append(uchars + lastCopiedFrom, i - lastCopiedFrom);
append(result, gtEntity);
lastCopiedFrom = i + 1;
break;
case '"':
result.append(uchars + lastCopiedFrom, i - lastCopiedFrom);
append(result, quotEntity);
lastCopiedFrom = i + 1;
break;
case noBreakSpace:
if (escapeNBSP) {
result.append(uchars + lastCopiedFrom, i - lastCopiedFrom);
append(result, nbspEntity);
lastCopiedFrom = i + 1;
}
break;
}
}
result.append(uchars + lastCopiedFrom, len - lastCopiedFrom);
}
static void appendEscapedContent(Vector<UChar>& result, pair<const UChar*, size_t> range, bool escapeNBSP)
{
const UChar* uchars = range.first;
unsigned len = range.second;
unsigned lastCopiedFrom = 0;
DEFINE_STATIC_LOCAL(const String, ampEntity, ("&amp;"));
DEFINE_STATIC_LOCAL(const String, gtEntity, ("&gt;"));
DEFINE_STATIC_LOCAL(const String, ltEntity, ("&lt;"));
DEFINE_STATIC_LOCAL(const String, nbspEntity, ("&nbsp;"));
for (unsigned i = 0; i < len; ++i) {
UChar c = uchars[i];
switch (c) {
case '&':
result.append(uchars + lastCopiedFrom, i - lastCopiedFrom);
append(result, ampEntity);
lastCopiedFrom = i + 1;
break;
case '<':
result.append(uchars + lastCopiedFrom, i - lastCopiedFrom);
append(result, ltEntity);
lastCopiedFrom = i + 1;
break;
case '>':
result.append(uchars + lastCopiedFrom, i - lastCopiedFrom);
append(result, gtEntity);
lastCopiedFrom = i + 1;
break;
case noBreakSpace:
if (escapeNBSP) {
result.append(uchars + lastCopiedFrom, i - lastCopiedFrom);
append(result, nbspEntity);
lastCopiedFrom = i + 1;
}
break;
}
}
result.append(uchars + lastCopiedFrom, len - lastCopiedFrom);
}
static String escapeContentText(const String& in, bool escapeNBSP)
{
Vector<UChar> buffer;
appendEscapedContent(buffer, make_pair(in.characters(), in.length()), escapeNBSP);
return String::adopt(buffer);
}
static void appendQuotedURLAttributeValue(Vector<UChar>& result, const String& urlString)
{
UChar quoteChar = '\"';
String strippedURLString = urlString.stripWhiteSpace();
if (protocolIsJavaScript(strippedURLString)) {
// minimal escaping for javascript urls
if (strippedURLString.contains('"')) {
if (strippedURLString.contains('\''))
strippedURLString.replace('\"', "&quot;");
else
quoteChar = '\'';
}
result.append(quoteChar);
append(result, strippedURLString);
result.append(quoteChar);
return;
}
// FIXME: This does not fully match other browsers. Firefox percent-escapes non-ASCII characters for innerHTML.
result.append(quoteChar);
appendAttributeValue(result, urlString, false);
result.append(quoteChar);
}
static String stringValueForRange(const Node* node, const Range* range)
{
if (!range)
return node->nodeValue();
String str = node->nodeValue();
ExceptionCode ec;
if (node == range->endContainer(ec))
str.truncate(range->endOffset(ec));
if (node == range->startContainer(ec))
str.remove(0, range->startOffset(ec));
return str;
}
static inline pair<const UChar*, size_t> ucharRange(const Node *node, const Range *range)
{
String str = node->nodeValue();
const UChar* characters = str.characters();
size_t length = str.length();
if (range) {
ExceptionCode ec;
if (node == range->endContainer(ec))
length = range->endOffset(ec);
if (node == range->startContainer(ec)) {
size_t start = range->startOffset(ec);
characters += start;
length -= start;
}
}
return make_pair(characters, length);
}
static inline void appendUCharRange(Vector<UChar>& result, const pair<const UChar*, size_t> range)
{
result.append(range.first, range.second);
}
static String renderedText(const Node* node, const Range* range)
{
if (!node->isTextNode())
return String();
ExceptionCode ec;
const Text* textNode = static_cast<const Text*>(node);
unsigned startOffset = 0;
unsigned endOffset = textNode->length();
if (range && node == range->startContainer(ec))
startOffset = range->startOffset(ec);
if (range && node == range->endContainer(ec))
endOffset = range->endOffset(ec);
Position start(const_cast<Node*>(node), startOffset);
Position end(const_cast<Node*>(node), endOffset);
return plainText(Range::create(node->document(), start, end).get());
}
static PassRefPtr<CSSMutableStyleDeclaration> styleFromMatchedRulesForElement(Element* element, bool authorOnly = true)
{
RefPtr<CSSMutableStyleDeclaration> style = CSSMutableStyleDeclaration::create();
RefPtr<CSSRuleList> matchedRules = element->document()->styleSelector()->styleRulesForElement(element, authorOnly);
if (matchedRules) {
for (unsigned i = 0; i < matchedRules->length(); i++) {
if (matchedRules->item(i)->type() == CSSRule::STYLE_RULE) {
RefPtr<CSSMutableStyleDeclaration> s = static_cast<CSSStyleRule*>(matchedRules->item(i))->style();
style->merge(s.get(), true);
}
}
}
return style.release();
}
static void removeEnclosingMailBlockquoteStyle(CSSMutableStyleDeclaration* style, Node* node)
{
Node* blockquote = nearestMailBlockquote(node);
if (!blockquote || !blockquote->parentNode())
return;
RefPtr<CSSMutableStyleDeclaration> parentStyle = Position(blockquote->parentNode(), 0).computedStyle()->copyInheritableProperties();
RefPtr<CSSMutableStyleDeclaration> blockquoteStyle = Position(blockquote, 0).computedStyle()->copyInheritableProperties();
parentStyle->diff(blockquoteStyle.get());
blockquoteStyle->diff(style);
}
static void removeDefaultStyles(CSSMutableStyleDeclaration* style, Document* document)
{
if (!document || !document->documentElement())
return;
RefPtr<CSSMutableStyleDeclaration> documentStyle = computedStyle(document->documentElement())->copyInheritableProperties();
documentStyle->diff(style);
}
static bool shouldAddNamespaceElem(const Element* elem)
{
// Don't add namespace attribute if it is already defined for this elem.
const AtomicString& prefix = elem->prefix();
AtomicString attr = !prefix.isEmpty() ? "xmlns:" + prefix : "xmlns";
return !elem->hasAttribute(attr);
}
static bool shouldAddNamespaceAttr(const Attribute* attr, HashMap<AtomicStringImpl*, AtomicStringImpl*>& namespaces)
{
// Don't add namespace attributes twice
DEFINE_STATIC_LOCAL(const AtomicString, xmlnsURI, ("http://www.w3.org/2000/xmlns/"));
DEFINE_STATIC_LOCAL(const QualifiedName, xmlnsAttr, (nullAtom, "xmlns", xmlnsURI));
if (attr->name() == xmlnsAttr) {
namespaces.set(emptyAtom.impl(), attr->value().impl());
return false;
}
QualifiedName xmlnsPrefixAttr("xmlns", attr->localName(), xmlnsURI);
if (attr->name() == xmlnsPrefixAttr) {
namespaces.set(attr->localName().impl(), attr->value().impl());
return false;
}
return true;
}
static void appendNamespace(Vector<UChar>& result, const AtomicString& prefix, const AtomicString& ns, HashMap<AtomicStringImpl*, AtomicStringImpl*>& namespaces)
{
if (ns.isEmpty())
return;
// Use emptyAtoms's impl() for both null and empty strings since the HashMap can't handle 0 as a key
AtomicStringImpl* pre = prefix.isEmpty() ? emptyAtom.impl() : prefix.impl();
AtomicStringImpl* foundNS = namespaces.get(pre);
if (foundNS != ns.impl()) {
namespaces.set(pre, ns.impl());
DEFINE_STATIC_LOCAL(const String, xmlns, ("xmlns"));
result.append(' ');
append(result, xmlns);
if (!prefix.isEmpty()) {
result.append(':');
append(result, prefix);
}
result.append('=');
result.append('"');
appendAttributeValue(result, ns, false);
result.append('"');
}
}
static void appendDocumentType(Vector<UChar>& result, const DocumentType* n)
{
if (n->name().isEmpty())
return;
append(result, "<!DOCTYPE ");
append(result, n->name());
if (!n->publicId().isEmpty()) {
append(result, " PUBLIC \"");
append(result, n->publicId());
append(result, "\"");
if (!n->systemId().isEmpty()) {
append(result, " \"");
append(result, n->systemId());
append(result, "\"");
}
} else if (!n->systemId().isEmpty()) {
append(result, " SYSTEM \"");
append(result, n->systemId());
append(result, "\"");
}
if (!n->internalSubset().isEmpty()) {
append(result, " [");
append(result, n->internalSubset());
append(result, "]");
}
append(result, ">");
}
static void removeExteriorStyles(CSSMutableStyleDeclaration* style)
{
style->removeProperty(CSSPropertyFloat);
}
enum RangeFullySelectsNode { DoesFullySelectNode, DoesNotFullySelectNode };
static void appendStartMarkup(Vector<UChar>& result, const Node* node, const Range* range, EAnnotateForInterchange annotate, bool convertBlocksToInlines = false, HashMap<AtomicStringImpl*, AtomicStringImpl*>* namespaces = 0, RangeFullySelectsNode rangeFullySelectsNode = DoesFullySelectNode)
{
bool documentIsHTML = node->document()->isHTMLDocument();
switch (node->nodeType()) {
case Node::TEXT_NODE: {
if (Node* parent = node->parentNode()) {
if (parent->hasTagName(scriptTag)
|| parent->hasTagName(styleTag)
|| parent->hasTagName(textareaTag)
|| parent->hasTagName(xmpTag)) {
appendUCharRange(result, ucharRange(node, range));
break;
}
}
if (!annotate) {
appendEscapedContent(result, ucharRange(node, range), documentIsHTML);
break;
}
bool useRenderedText = !enclosingNodeWithTag(Position(const_cast<Node*>(node), 0), selectTag);
String markup = escapeContentText(useRenderedText ? renderedText(node, range) : stringValueForRange(node, range), false);
markup = convertHTMLTextToInterchangeFormat(markup, static_cast<const Text*>(node));
append(result, markup);
break;
}
case Node::COMMENT_NODE:
// FIXME: Comment content is not escaped, but XMLSerializer (and possibly other callers) should raise an exception if it includes "-->".
append(result, "<!--");
append(result, static_cast<const Comment*>(node)->nodeValue());
append(result, "-->");
break;
case Node::DOCUMENT_NODE:
case Node::DOCUMENT_FRAGMENT_NODE:
break;
case Node::DOCUMENT_TYPE_NODE:
appendDocumentType(result, static_cast<const DocumentType*>(node));
break;
case Node::PROCESSING_INSTRUCTION_NODE: {
// FIXME: PI data is not escaped, but XMLSerializer (and possibly other callers) this should raise an exception if it includes "?>".
const ProcessingInstruction* n = static_cast<const ProcessingInstruction*>(node);
append(result, "<?");
append(result, n->target());
append(result, " ");
append(result, n->data());
append(result, "?>");
break;
}
case Node::ELEMENT_NODE: {
result.append('<');
const Element* el = static_cast<const Element*>(node);
bool convert = convertBlocksToInlines && isBlock(const_cast<Node*>(node));
append(result, el->nodeNamePreservingCase());
NamedNodeMap *attrs = el->attributes();
unsigned length = attrs->length();
if (!documentIsHTML && namespaces && shouldAddNamespaceElem(el))
appendNamespace(result, el->prefix(), el->namespaceURI(), *namespaces);
for (unsigned int i = 0; i < length; i++) {
Attribute *attr = attrs->attributeItem(i);
// We'll handle the style attribute separately, below.
if (attr->name() == styleAttr && el->isHTMLElement() && (annotate || convert))
continue;
result.append(' ');
if (documentIsHTML)
append(result, attr->name().localName());
else
append(result, attr->name().toString());
result.append('=');
if (el->isURLAttribute(attr))
appendQuotedURLAttributeValue(result, attr->value());
else {
result.append('\"');
appendAttributeValue(result, attr->value(), documentIsHTML);
result.append('\"');
}
if (!documentIsHTML && namespaces && shouldAddNamespaceAttr(attr, *namespaces))
appendNamespace(result, attr->prefix(), attr->namespaceURI(), *namespaces);
}
if (el->isHTMLElement() && (annotate || convert)) {
Element* element = const_cast<Element*>(el);
RefPtr<CSSMutableStyleDeclaration> style = static_cast<HTMLElement*>(element)->getInlineStyleDecl()->copy();
if (annotate) {
RefPtr<CSSMutableStyleDeclaration> styleFromMatchedRules = styleFromMatchedRulesForElement(const_cast<Element*>(el));
// Styles from the inline style declaration, held in the variable "style", take precedence
// over those from matched rules.
styleFromMatchedRules->merge(style.get());
style = styleFromMatchedRules;
RefPtr<CSSComputedStyleDeclaration> computedStyleForElement = computedStyle(element);
RefPtr<CSSMutableStyleDeclaration> fromComputedStyle = CSSMutableStyleDeclaration::create();
{
CSSMutableStyleDeclaration::const_iterator end = style->end();
for (CSSMutableStyleDeclaration::const_iterator it = style->begin(); it != end; ++it) {
const CSSProperty& property = *it;
CSSValue* value = property.value();
// The property value, if it's a percentage, may not reflect the actual computed value.
// For example: style="height: 1%; overflow: visible;" in quirksmode
// FIXME: There are others like this, see <rdar://problem/5195123> Slashdot copy/paste fidelity problem
if (value->cssValueType() == CSSValue::CSS_PRIMITIVE_VALUE)
if (static_cast<CSSPrimitiveValue*>(value)->primitiveType() == CSSPrimitiveValue::CSS_PERCENTAGE)
if (RefPtr<CSSValue> computedPropertyValue = computedStyleForElement->getPropertyCSSValue(property.id()))
fromComputedStyle->addParsedProperty(CSSProperty(property.id(), computedPropertyValue));
}
}
style->merge(fromComputedStyle.get());
}
if (convert)
style->setProperty(CSSPropertyDisplay, CSSValueInline, true);
// If the node is not fully selected by the range, then we don't want to keep styles that affect its relationship to the nodes around it
// only the ones that affect it and the nodes within it.
if (rangeFullySelectsNode == DoesNotFullySelectNode)
removeExteriorStyles(style.get());
if (style->length() > 0) {
DEFINE_STATIC_LOCAL(const String, stylePrefix, (" style=\""));
append(result, stylePrefix);
appendAttributeValue(result, style->cssText(), documentIsHTML);
result.append('\"');
}
}
if (shouldSelfClose(el)) {
if (el->isHTMLElement())
result.append(' '); // XHTML 1.0 <-> HTML compatibility.
result.append('/');
}
result.append('>');
break;
}
case Node::CDATA_SECTION_NODE: {
// FIXME: CDATA content is not escaped, but XMLSerializer (and possibly other callers) should raise an exception if it includes "]]>".
const CDATASection* n = static_cast<const CDATASection*>(node);
append(result, "<![CDATA[");
append(result, n->data());
append(result, "]]>");
break;
}
case Node::ATTRIBUTE_NODE:
case Node::ENTITY_NODE:
case Node::ENTITY_REFERENCE_NODE:
case Node::NOTATION_NODE:
case Node::XPATH_NAMESPACE_NODE:
ASSERT_NOT_REACHED();
break;
}
}
static String getStartMarkup(const Node* node, const Range* range, EAnnotateForInterchange annotate, bool convertBlocksToInlines = false, HashMap<AtomicStringImpl*, AtomicStringImpl*>* namespaces = 0, RangeFullySelectsNode rangeFullySelectsNode = DoesFullySelectNode)
{
Vector<UChar> result;
appendStartMarkup(result, node, range, annotate, convertBlocksToInlines, namespaces, rangeFullySelectsNode);
return String::adopt(result);
}
static inline bool doesHTMLForbidEndTag(const Node *node)
{
if (node->isHTMLElement()) {
const HTMLElement* htmlElt = static_cast<const HTMLElement*>(node);
return (htmlElt->endTagRequirement() == TagStatusForbidden);
}
return false;
}
// Rules of self-closure
// 1. No elements in HTML documents use the self-closing syntax.
// 2. Elements w/ children never self-close because they use a separate end tag.
// 3. HTML elements which do not have a "forbidden" end tag will close with a separate end tag.
// 4. Other elements self-close.
static inline bool shouldSelfClose(const Node *node)
{
if (node->document()->isHTMLDocument())
return false;
if (node->hasChildNodes())
return false;
if (node->isHTMLElement() && !doesHTMLForbidEndTag(node))
return false;
return true;
}
static void appendEndMarkup(Vector<UChar>& result, const Node* node)
{
if (!node->isElementNode() || shouldSelfClose(node) || (!node->hasChildNodes() && doesHTMLForbidEndTag(node)))
return;
result.append('<');
result.append('/');
append(result, static_cast<const Element*>(node)->nodeNamePreservingCase());
result.append('>');
}
static String getEndMarkup(const Node *node)
{
Vector<UChar> result;
appendEndMarkup(result, node);
return String::adopt(result);
}
class MarkupAccumulator {
public:
MarkupAccumulator(Node* nodeToSkip, Vector<Node*>* nodes)
: m_nodeToSkip(nodeToSkip)
, m_nodes(nodes)
{
}
void appendMarkup(Node* startNode, EChildrenOnly, const HashMap<AtomicStringImpl*, AtomicStringImpl*>* namespaces = 0);
String takeResult() { return String::adopt(m_result); }
private:
Vector<UChar> m_result;
Node* m_nodeToSkip;
Vector<Node*>* m_nodes;
};
// FIXME: Would be nice to do this in a non-recursive way.
void MarkupAccumulator::appendMarkup(Node* startNode, EChildrenOnly childrenOnly, const HashMap<AtomicStringImpl*, AtomicStringImpl*>* namespaces)
{
if (startNode == m_nodeToSkip)
return;
HashMap<AtomicStringImpl*, AtomicStringImpl*> namespaceHash;
if (namespaces)
namespaceHash = *namespaces;
// start tag
if (!childrenOnly) {
if (m_nodes)
m_nodes->append(startNode);
appendStartMarkup(m_result, startNode, 0, DoNotAnnotateForInterchange, false, &namespaceHash);
}
// children
if (!(startNode->document()->isHTMLDocument() && doesHTMLForbidEndTag(startNode))) {
for (Node* current = startNode->firstChild(); current; current = current->nextSibling())
appendMarkup(current, IncludeNode, &namespaceHash);
}
// end tag
if (!childrenOnly)
appendEndMarkup(m_result, startNode);
}
static void completeURLs(Node* node, const String& baseURL)
{
Vector<AttributeChange> changes;
KURL parsedBaseURL(baseURL);
Node* end = node->traverseNextSibling();
for (Node* n = node; n != end; n = n->traverseNextNode()) {
if (n->isElementNode()) {
Element* e = static_cast<Element*>(n);
NamedNodeMap* attrs = e->attributes();
unsigned length = attrs->length();
for (unsigned i = 0; i < length; i++) {
Attribute* attr = attrs->attributeItem(i);
if (e->isURLAttribute(attr))
changes.append(AttributeChange(e, attr->name(), KURL(parsedBaseURL, attr->value()).string()));
}
}
}
size_t numChanges = changes.size();
for (size_t i = 0; i < numChanges; ++i)
changes[i].apply();
}
static bool needInterchangeNewlineAfter(const VisiblePosition& v)
{
VisiblePosition next = v.next();
Node* upstreamNode = next.deepEquivalent().upstream().node();
Node* downstreamNode = v.deepEquivalent().downstream().node();
// Add an interchange newline if a paragraph break is selected and a br won't already be added to the markup to represent it.
return isEndOfParagraph(v) && isStartOfParagraph(next) && !(upstreamNode->hasTagName(brTag) && upstreamNode == downstreamNode);
}
static PassRefPtr<CSSMutableStyleDeclaration> styleFromMatchedRulesAndInlineDecl(const Node* node)
{
if (!node->isHTMLElement())
return 0;
// FIXME: Having to const_cast here is ugly, but it is quite a bit of work to untangle
// the non-const-ness of styleFromMatchedRulesForElement.
HTMLElement* element = const_cast<HTMLElement*>(static_cast<const HTMLElement*>(node));
RefPtr<CSSMutableStyleDeclaration> style = styleFromMatchedRulesForElement(element);
RefPtr<CSSMutableStyleDeclaration> inlineStyleDecl = element->getInlineStyleDecl();
style->merge(inlineStyleDecl.get());
return style.release();
}
static bool propertyMissingOrEqualToNone(CSSMutableStyleDeclaration* style, int propertyID)
{
if (!style)
return false;
RefPtr<CSSValue> value = style->getPropertyCSSValue(propertyID);
if (!value)
return true;
if (!value->isPrimitiveValue())
return false;
return static_cast<CSSPrimitiveValue*>(value.get())->getIdent() == CSSValueNone;
}
static bool elementHasTextDecorationProperty(const Node* node)
{
RefPtr<CSSMutableStyleDeclaration> style = styleFromMatchedRulesAndInlineDecl(node);
if (!style)
return false;
return !propertyMissingOrEqualToNone(style.get(), CSSPropertyTextDecoration);
}
static String joinMarkups(const Vector<String>& preMarkups, const Vector<String>& postMarkups)
{
size_t length = 0;
size_t preCount = preMarkups.size();
for (size_t i = 0; i < preCount; ++i)
length += preMarkups[i].length();
size_t postCount = postMarkups.size();
for (size_t i = 0; i < postCount; ++i)
length += postMarkups[i].length();
Vector<UChar> result;
result.reserveInitialCapacity(length);
for (size_t i = preCount; i > 0; --i)
append(result, preMarkups[i - 1]);
for (size_t i = 0; i < postCount; ++i)
append(result, postMarkups[i]);
return String::adopt(result);
}
static bool isSpecialAncestorBlock(Node* node)
{
if (!node || !isBlock(node))
return false;
return node->hasTagName(listingTag) ||
node->hasTagName(olTag) ||
node->hasTagName(preTag) ||
node->hasTagName(tableTag) ||
node->hasTagName(ulTag) ||
node->hasTagName(xmpTag) ||
node->hasTagName(h1Tag) ||
node->hasTagName(h2Tag) ||
node->hasTagName(h3Tag) ||
node->hasTagName(h4Tag) ||
node->hasTagName(h5Tag);
}
static bool shouldIncludeWrapperForFullySelectedRoot(Node* fullySelectedRoot, CSSMutableStyleDeclaration* style)
{
if (fullySelectedRoot->isElementNode() && static_cast<Element*>(fullySelectedRoot)->hasAttribute(backgroundAttr))
return true;
return style->getPropertyCSSValue(CSSPropertyBackgroundImage) ||
style->getPropertyCSSValue(CSSPropertyBackgroundColor);
}
// FIXME: Shouldn't we omit style info when annotate == DoNotAnnotateForInterchange?
// FIXME: At least, annotation and style info should probably not be included in range.markupString()
String createMarkup(const Range* range, Vector<Node*>* nodes, EAnnotateForInterchange annotate, bool convertBlocksToInlines)
{
DEFINE_STATIC_LOCAL(const String, interchangeNewlineString, ("<br class=\"" AppleInterchangeNewline "\">"));
if (!range)
return "";
Document* document = range->ownerDocument();
if (!document)
return "";
bool documentIsHTML = document->isHTMLDocument();
// Disable the delete button so it's elements are not serialized into the markup,
// but make sure neither endpoint is inside the delete user interface.
Frame* frame = document->frame();
DeleteButtonController* deleteButton = frame ? frame->editor()->deleteButtonController() : 0;
RefPtr<Range> updatedRange = avoidIntersectionWithNode(range, deleteButton ? deleteButton->containerElement() : 0);
if (!updatedRange)
return "";
if (deleteButton)
deleteButton->disable();
ExceptionCode ec = 0;
bool collapsed = updatedRange->collapsed(ec);
ASSERT(ec == 0);
if (collapsed)
return "";
Node* commonAncestor = updatedRange->commonAncestorContainer(ec);
ASSERT(ec == 0);
if (!commonAncestor)
return "";
document->updateLayoutIgnorePendingStylesheets();
Vector<String> markups;
Vector<String> preMarkups;
Node* pastEnd = updatedRange->pastLastNode();
Node* lastClosed = 0;
Vector<Node*> ancestorsToClose;
Node* startNode = updatedRange->firstNode();
VisiblePosition visibleStart(updatedRange->startPosition(), VP_DEFAULT_AFFINITY);
VisiblePosition visibleEnd(updatedRange->endPosition(), VP_DEFAULT_AFFINITY);
if (annotate && needInterchangeNewlineAfter(visibleStart)) {
if (visibleStart == visibleEnd.previous()) {
if (deleteButton)
deleteButton->enable();
return interchangeNewlineString;
}
markups.append(interchangeNewlineString);
startNode = visibleStart.next().deepEquivalent().node();
if (pastEnd && Range::compareBoundaryPoints(startNode, 0, pastEnd, 0) >= 0) {
if (deleteButton)
deleteButton->enable();
return interchangeNewlineString;
}
}
Node* next;
for (Node* n = startNode; n != pastEnd; n = next) {
// According to <rdar://problem/5730668>, it is possible for n to blow
// past pastEnd and become null here. This shouldn't be possible.
// This null check will prevent crashes (but create too much markup)
// and the ASSERT will hopefully lead us to understanding the problem.
ASSERT(n);
if (!n)
break;
next = n->traverseNextNode();
bool skipDescendants = false;
bool addMarkupForNode = true;
if (!n->renderer() && !enclosingNodeWithTag(Position(n, 0), selectTag)) {
skipDescendants = true;
addMarkupForNode = false;
next = n->traverseNextSibling();
// Don't skip over pastEnd.
if (pastEnd && pastEnd->isDescendantOf(n))
next = pastEnd;
}
if (isBlock(n) && canHaveChildrenForEditing(n) && next == pastEnd)
// Don't write out empty block containers that aren't fully selected.
continue;
// Add the node to the markup.
if (addMarkupForNode) {
markups.append(getStartMarkup(n, updatedRange.get(), annotate));
if (nodes)
nodes->append(n);
}
if (n->firstChild() == 0 || skipDescendants) {
// Node has no children, or we are skipping it's descendants, add its close tag now.
if (addMarkupForNode) {
markups.append(getEndMarkup(n));
lastClosed = n;
}
// Check if the node is the last leaf of a tree.
if (!n->nextSibling() || next == pastEnd) {
if (!ancestorsToClose.isEmpty()) {
// Close up the ancestors.
do {
Node *ancestor = ancestorsToClose.last();
if (next != pastEnd && next->isDescendantOf(ancestor))
break;
// Not at the end of the range, close ancestors up to sibling of next node.
markups.append(getEndMarkup(ancestor));
lastClosed = ancestor;
ancestorsToClose.removeLast();
} while (!ancestorsToClose.isEmpty());
}
// Surround the currently accumulated markup with markup for ancestors we never opened as we leave the subtree(s) rooted at those ancestors.
Node* nextParent = next ? next->parentNode() : 0;
if (next != pastEnd && n != nextParent) {
Node* lastAncestorClosedOrSelf = n->isDescendantOf(lastClosed) ? lastClosed : n;
for (Node *parent = lastAncestorClosedOrSelf->parent(); parent != 0 && parent != nextParent; parent = parent->parentNode()) {
// All ancestors that aren't in the ancestorsToClose list should either be a) unrendered:
if (!parent->renderer())
continue;
// or b) ancestors that we never encountered during a pre-order traversal starting at startNode:
ASSERT(startNode->isDescendantOf(parent));
preMarkups.append(getStartMarkup(parent, updatedRange.get(), annotate));
markups.append(getEndMarkup(parent));
if (nodes)
nodes->append(parent);
lastClosed = parent;
}
}
}
} else if (addMarkupForNode && !skipDescendants)
// We added markup for this node, and we're descending into it. Set it to close eventually.
ancestorsToClose.append(n);
}
// Include ancestors that aren't completely inside the range but are required to retain
// the structure and appearance of the copied markup.
Node* specialCommonAncestor = 0;
Node* commonAncestorBlock = commonAncestor ? enclosingBlock(commonAncestor) : 0;
if (annotate && commonAncestorBlock) {
if (commonAncestorBlock->hasTagName(tbodyTag) || commonAncestorBlock->hasTagName(trTag)) {
Node* table = commonAncestorBlock->parentNode();
while (table && !table->hasTagName(tableTag))
table = table->parentNode();
if (table)
specialCommonAncestor = table;
} else if (isSpecialAncestorBlock(commonAncestorBlock))
specialCommonAncestor = commonAncestorBlock;
}
// Retain the Mail quote level by including all ancestor mail block quotes.
if (lastClosed && annotate) {
for (Node *ancestor = lastClosed->parentNode(); ancestor; ancestor = ancestor->parentNode())
if (isMailBlockquote(ancestor))
specialCommonAncestor = ancestor;
}
Node* checkAncestor = specialCommonAncestor ? specialCommonAncestor : commonAncestor;
if (checkAncestor->renderer()) {
RefPtr<CSSMutableStyleDeclaration> checkAncestorStyle = computedStyle(checkAncestor)->copyInheritableProperties();
if (!propertyMissingOrEqualToNone(checkAncestorStyle.get(), CSSPropertyWebkitTextDecorationsInEffect))
specialCommonAncestor = enclosingNodeOfType(Position(checkAncestor, 0), &elementHasTextDecorationProperty);
}
// If a single tab is selected, commonAncestor will be a text node inside a tab span.
// If two or more tabs are selected, commonAncestor will be the tab span.
// In either case, if there is a specialCommonAncestor already, it will necessarily be above
// any tab span that needs to be included.
if (!specialCommonAncestor && isTabSpanTextNode(commonAncestor))
specialCommonAncestor = commonAncestor->parentNode();
if (!specialCommonAncestor && isTabSpanNode(commonAncestor))
specialCommonAncestor = commonAncestor;
if (Node *enclosingAnchor = enclosingNodeWithTag(Position(specialCommonAncestor ? specialCommonAncestor : commonAncestor, 0), aTag))
specialCommonAncestor = enclosingAnchor;
Node* body = enclosingNodeWithTag(Position(commonAncestor, 0), bodyTag);
// FIXME: Do this for all fully selected blocks, not just the body.
Node* fullySelectedRoot = body && *VisibleSelection::selectionFromContentsOfNode(body).toNormalizedRange() == *updatedRange ? body : 0;
RefPtr<CSSMutableStyleDeclaration> fullySelectedRootStyle = fullySelectedRoot ? styleFromMatchedRulesAndInlineDecl(fullySelectedRoot) : 0;
if (annotate && fullySelectedRoot) {
if (shouldIncludeWrapperForFullySelectedRoot(fullySelectedRoot, fullySelectedRootStyle.get()))
specialCommonAncestor = fullySelectedRoot;
}
if (specialCommonAncestor && lastClosed) {
// Also include all of the ancestors of lastClosed up to this special ancestor.
for (Node* ancestor = lastClosed->parentNode(); ancestor; ancestor = ancestor->parentNode()) {
if (ancestor == fullySelectedRoot && !convertBlocksToInlines) {
// Bring the background attribute over, but not as an attribute because a background attribute on a div
// appears to have no effect.
if (!fullySelectedRootStyle->getPropertyCSSValue(CSSPropertyBackgroundImage) && static_cast<Element*>(fullySelectedRoot)->hasAttribute(backgroundAttr))
fullySelectedRootStyle->setProperty(CSSPropertyBackgroundImage, "url('" + static_cast<Element*>(fullySelectedRoot)->getAttribute(backgroundAttr) + "')");
if (fullySelectedRootStyle->length()) {
Vector<UChar> openTag;
DEFINE_STATIC_LOCAL(const String, divStyle, ("<div style=\""));
append(openTag, divStyle);
appendAttributeValue(openTag, fullySelectedRootStyle->cssText(), documentIsHTML);
openTag.append('\"');
openTag.append('>');
preMarkups.append(String::adopt(openTag));
DEFINE_STATIC_LOCAL(const String, divCloseTag, ("</div>"));
markups.append(divCloseTag);
}
} else {
// Since this node and all the other ancestors are not in the selection we want to set RangeFullySelectsNode to DoesNotFullySelectNode
// so that styles that affect the exterior of the node are not included.
preMarkups.append(getStartMarkup(ancestor, updatedRange.get(), annotate, convertBlocksToInlines, 0, DoesNotFullySelectNode));
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 childrenOnly, Vector<Node*>* nodes)
{
if (!node)
return "";
HTMLElement* deleteButtonContainerElement = 0;
if (Frame* frame = node->document()->frame()) {
deleteButtonContainerElement = frame->editor()->deleteButtonController()->containerElement();
if (node->isDescendantOf(deleteButtonContainerElement))
return "";
}
MarkupAccumulator accumulator(deleteButtonContainerElement, nodes);
accumulator.appendMarkup(const_cast<Node*>(node), childrenOnly);
return accumulator.takeResult();
}
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->cloneElementWithoutChildren();
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);
}
}