Merge webkit.org at R49305 : Automatic merge by git.

Change-Id: I8968561bc1bfd72b8923b7118d3728579c6dbcc7

1 files changed, 313 insertions, 0 deletions

diff --git a/WebCore/xml/XSLStyleSheetLibxslt.cpp b/WebCore/xml/XSLStyleSheetLibxslt.cpp
new file mode 100644
index 0000000..2ae8b82
--- /dev/null
+++ b/WebCore/xml/XSLStyleSheetLibxslt.cpp
@@ -0,0 +1,313 @@
+/*
+ * This file is part of the XSL implementation.
+ *
+ * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+#include "XSLStyleSheet.h"
+
+#if ENABLE(XSLT)
+
+#include "CString.h"
+#include "Console.h"
+#include "DOMWindow.h"
+#include "DocLoader.h"
+#include "Document.h"
+#include "Frame.h"
+#include "Node.h"
+#include "TransformSource.h"
+#include "XMLTokenizer.h"
+#include "XMLTokenizerScope.h"
+#include "XSLImportRule.h"
+#include "XSLTProcessor.h"
+#include "loader.h"
+
+#include <libxml/uri.h>
+#include <libxslt/xsltutils.h>
+
+#if PLATFORM(MAC)
+#include "SoftLinking.h"
+#endif
+
+#if PLATFORM(MAC)
+SOFT_LINK_LIBRARY(libxslt)
+SOFT_LINK(libxslt, xsltIsBlank, int, (xmlChar *str), (str))
+SOFT_LINK(libxslt, xsltGetNsProp, xmlChar *, (xmlNodePtr node, const xmlChar *name, const xmlChar *nameSpace), (node, name, nameSpace))
+SOFT_LINK(libxslt, xsltParseStylesheetDoc, xsltStylesheetPtr, (xmlDocPtr doc), (doc))
+SOFT_LINK(libxslt, xsltLoadStylesheetPI, xsltStylesheetPtr, (xmlDocPtr doc), (doc))
+#endif
+
+namespace WebCore {
+
+XSLStyleSheet::XSLStyleSheet(XSLImportRule* parentRule, const String& href)
+    : StyleSheet(parentRule, href)
+    , m_ownerDocument(0)
+    , m_embedded(false)
+    , m_processed(false) // Child sheets get marked as processed when the libxslt engine has finally seen them.
+    , m_stylesheetDoc(0)
+    , m_stylesheetDocTaken(false)
+    , m_parentStyleSheet(0)
+{
+}
+
+XSLStyleSheet::XSLStyleSheet(Node* parentNode, const String& href,  bool embedded)
+    : StyleSheet(parentNode, href)
+    , m_ownerDocument(parentNode->document())
+    , m_embedded(embedded)
+    , m_processed(true) // The root sheet starts off processed.
+    , m_stylesheetDoc(0)
+    , m_stylesheetDocTaken(false)
+    , m_parentStyleSheet(0)
+{
+}
+
+XSLStyleSheet::~XSLStyleSheet()
+{
+    if (!m_stylesheetDocTaken)
+        xmlFreeDoc(m_stylesheetDoc);
+}
+
+bool XSLStyleSheet::isLoading()
+{
+    unsigned len = length();
+    for (unsigned i = 0; i < len; ++i) {
+        StyleBase* rule = item(i);
+        if (rule->isImportRule()) {
+            XSLImportRule* import = static_cast<XSLImportRule*>(rule);
+            if (import->isLoading())
+                return true;
+        }
+    }
+    return false;
+}
+
+void XSLStyleSheet::checkLoaded()
+{
+    if (isLoading())
+        return;
+    if (parent())
+        parent()->checkLoaded();
+    if (ownerNode())
+        ownerNode()->sheetLoaded();
+}
+
+xmlDocPtr XSLStyleSheet::document()
+{
+    if (m_embedded && ownerDocument() && ownerDocument()->transformSource())
+        return (xmlDocPtr)ownerDocument()->transformSource()->platformSource();
+    return m_stylesheetDoc;
+}
+
+void XSLStyleSheet::clearDocuments()
+{
+    m_stylesheetDoc = 0;
+    unsigned len = length();
+    for (unsigned i = 0; i < len; ++i) {
+        StyleBase* rule = item(i);
+        if (rule->isImportRule()) {
+            XSLImportRule* import = static_cast<XSLImportRule*>(rule);
+            if (import->styleSheet())
+                import->styleSheet()->clearDocuments();
+        }
+    }
+}
+
+DocLoader* XSLStyleSheet::docLoader()
+{
+    if (!m_ownerDocument)
+        return 0;
+    return m_ownerDocument->docLoader();
+}
+
+bool XSLStyleSheet::parseString(const String& string, bool)
+{
+    // Parse in a single chunk into an xmlDocPtr
+    const UChar BOM = 0xFEFF;
+    const unsigned char BOMHighByte = *reinterpret_cast<const unsigned char*>(&BOM);
+    if (!m_stylesheetDocTaken)
+        xmlFreeDoc(m_stylesheetDoc);
+    m_stylesheetDocTaken = false;
+
+    Console* console = 0;
+    if (Frame* frame = ownerDocument()->frame())
+        console = frame->domWindow()->console();
+
+    XMLTokenizerScope scope(docLoader(), XSLTProcessor::genericErrorFunc, XSLTProcessor::parseErrorFunc, console);
+
+    const char* buffer = reinterpret_cast<const char*>(string.characters());
+    int size = string.length() * sizeof(UChar);
+
+    xmlParserCtxtPtr ctxt = xmlCreateMemoryParserCtxt(buffer, size);
+
+    if (m_parentStyleSheet) {
+        // The XSL transform may leave the newly-transformed document
+        // with references to the symbol dictionaries of the style sheet
+        // and any of its children. XML document disposal can corrupt memory
+        // if a document uses more than one symbol dictionary, so we
+        // ensure that all child stylesheets use the same dictionaries as their
+        // parents.
+        xmlDictFree(ctxt->dict);
+        ctxt->dict = m_parentStyleSheet->m_stylesheetDoc->dict;
+        xmlDictReference(ctxt->dict);
+    }
+
+    m_stylesheetDoc = xmlCtxtReadMemory(ctxt, buffer, size,
+        href().utf8().data(),
+        BOMHighByte == 0xFF ? "UTF-16LE" : "UTF-16BE",
+        XML_PARSE_NOENT | XML_PARSE_DTDATTR | XML_PARSE_NOWARNING | XML_PARSE_NOCDATA);
+    xmlFreeParserCtxt(ctxt);
+
+    loadChildSheets();
+
+    return m_stylesheetDoc;
+}
+
+void XSLStyleSheet::loadChildSheets()
+{
+    if (!document())
+        return;
+
+    xmlNodePtr stylesheetRoot = document()->children;
+
+    // Top level children may include other things such as DTD nodes, we ignore those.
+    while (stylesheetRoot && stylesheetRoot->type != XML_ELEMENT_NODE)
+        stylesheetRoot = stylesheetRoot->next;
+
+    if (m_embedded) {
+        // We have to locate (by ID) the appropriate embedded stylesheet element, so that we can walk the
+        // import/include list.
+        xmlAttrPtr idNode = xmlGetID(document(), (const xmlChar*)(href().utf8().data()));
+        if (!idNode)
+            return;
+        stylesheetRoot = idNode->parent;
+    } else {
+        // FIXME: Need to handle an external URI with a # in it.  This is a pretty minor edge case, so we'll deal
+        // with it later.
+    }
+
+    if (stylesheetRoot) {
+        // Walk the children of the root element and look for import/include elements.
+        // Imports must occur first.
+        xmlNodePtr curr = stylesheetRoot->children;
+        while (curr) {
+            if (curr->type != XML_ELEMENT_NODE) {
+                curr = curr->next;
+                continue;
+            }
+            if (IS_XSLT_ELEM(curr) && IS_XSLT_NAME(curr, "import")) {
+                xmlChar* uriRef = xsltGetNsProp(curr, (const xmlChar*)"href", XSLT_NAMESPACE);
+                loadChildSheet(String::fromUTF8((const char*)uriRef));
+                xmlFree(uriRef);
+            } else
+                break;
+            curr = curr->next;
+        }
+
+        // Now handle includes.
+        while (curr) {
+            if (curr->type == XML_ELEMENT_NODE && IS_XSLT_ELEM(curr) && IS_XSLT_NAME(curr, "include")) {
+                xmlChar* uriRef = xsltGetNsProp(curr, (const xmlChar*)"href", XSLT_NAMESPACE);
+                loadChildSheet(String::fromUTF8((const char*)uriRef));
+                xmlFree(uriRef);
+            }
+            curr = curr->next;
+        }
+    }
+}
+
+void XSLStyleSheet::loadChildSheet(const String& href)
+{
+    RefPtr<XSLImportRule> childRule = XSLImportRule::create(this, href);
+    append(childRule);
+    childRule->loadSheet();
+}
+
+xsltStylesheetPtr XSLStyleSheet::compileStyleSheet()
+{
+    // FIXME: Hook up error reporting for the stylesheet compilation process.
+    if (m_embedded)
+        return xsltLoadStylesheetPI(document());
+
+    // xsltParseStylesheetDoc makes the document part of the stylesheet
+    // so we have to release our pointer to it.
+    ASSERT(!m_stylesheetDocTaken);
+    xsltStylesheetPtr result = xsltParseStylesheetDoc(m_stylesheetDoc);
+    if (result)
+        m_stylesheetDocTaken = true;
+    return result;
+}
+
+void XSLStyleSheet::setParentStyleSheet(XSLStyleSheet* parent)
+{
+    m_parentStyleSheet = parent;
+    if (parent)
+        m_ownerDocument = parent->ownerDocument();
+}
+
+xmlDocPtr XSLStyleSheet::locateStylesheetSubResource(xmlDocPtr parentDoc, const xmlChar* uri)
+{
+    bool matchedParent = (parentDoc == document());
+    unsigned len = length();
+    for (unsigned i = 0; i < len; ++i) {
+        StyleBase* rule = item(i);
+        if (rule->isImportRule()) {
+            XSLImportRule* import = static_cast<XSLImportRule*>(rule);
+            XSLStyleSheet* child = import->styleSheet();
+            if (!child)
+                continue;
+            if (matchedParent) {
+                if (child->processed())
+                    continue; // libxslt has been given this sheet already.
+
+                // Check the URI of the child stylesheet against the doc URI.
+                // In order to ensure that libxml canonicalized both URLs, we get the original href
+                // string from the import rule and canonicalize it using libxml before comparing it
+                // with the URI argument.
+                CString importHref = import->href().utf8();
+                xmlChar* base = xmlNodeGetBase(parentDoc, (xmlNodePtr)parentDoc);
+                xmlChar* childURI = xmlBuildURI((const xmlChar*)importHref.data(), base);
+                bool equalURIs = xmlStrEqual(uri, childURI);
+                xmlFree(base);
+                xmlFree(childURI);
+                if (equalURIs) {
+                    child->markAsProcessed();
+                    return child->document();
+                }
+            } else {
+                xmlDocPtr result = import->styleSheet()->locateStylesheetSubResource(parentDoc, uri);
+                if (result)
+                    return result;
+            }
+        }
+    }
+
+    return 0;
+}
+
+void XSLStyleSheet::markAsProcessed()
+{
+    ASSERT(!m_processed);
+    ASSERT(!m_stylesheetDocTaken);
+    m_processed = true;
+    m_stylesheetDocTaken = true;
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(XSLT)