Index: Source/core/xml/DocumentXSLT.cpp |
diff --git a/Source/core/xml/DocumentXSLT.cpp b/Source/core/xml/DocumentXSLT.cpp |
new file mode 100644 |
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--- /dev/null |
+++ b/Source/core/xml/DocumentXSLT.cpp |
@@ -0,0 +1,183 @@ |
+// Copyright 2014 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "config.h" |
+#include "core/xml/DocumentXSLT.h" |
+ |
+#include "bindings/core/v8/DOMWrapperWorld.h" |
+#include "bindings/core/v8/ScriptState.h" |
+#include "bindings/core/v8/V8AbstractEventListener.h" |
+#include "bindings/core/v8/V8Binding.h" |
+#include "core/dom/Document.h" |
+#include "core/dom/Node.h" |
+#include "core/dom/ProcessingInstruction.h" |
+#include "core/events/Event.h" |
+#include "core/events/EventListener.h" |
+#include "core/frame/UseCounter.h" |
+#include "core/inspector/InspectorInstrumentation.h" |
+#include "core/xml/XSLStyleSheet.h" |
+#include "core/xml/XSLTProcessor.h" |
+ |
+namespace blink { |
+ |
+class DOMContentLoadedListener final : public V8AbstractEventListener { |
+public: |
+ virtual bool operator==(const EventListener&) |
+ { |
+ return true; |
+ } |
+ |
+ virtual void handleEvent(ExecutionContext* context, Event* event) |
+ { |
+ ASSERT(RuntimeEnabledFeatures::xsltEnabled()); |
+ ASSERT(event->type() == "DOMContentLoaded"); |
+ ScriptState::Scope scope(scriptState()); |
+ |
+ Document& document = *toDocument(context); |
+ ASSERT(!document.parsing()); |
+ |
+ // Processing instruction (XML documents only). |
+ // We don't support linking to embedded CSS stylesheets, |
+ // see <https://bugs.webkit.org/show_bug.cgi?id=49281> for discussion. |
+ // Don't apply XSL transforms to already transformed documents. |
+ if (DocumentXSLT::hasTransformSourceDocument(document)) |
+ return; |
+ |
+ ProcessingInstruction* pi = DocumentXSLT::findXSLStyleSheet(document); |
+ if (!pi || pi != m_processingInstruction || pi->isLoading()) |
+ return; |
+ DocumentXSLT::applyXSLTransform(document, pi); |
+ } |
+ |
+ static PassRefPtr<DOMContentLoadedListener> create(ScriptState* scriptState, ProcessingInstruction* pi) |
+ { |
+ return adoptRef(new DOMContentLoadedListener(scriptState, pi)); |
+ } |
+ |
+private: |
+ DOMContentLoadedListener(ScriptState* scriptState, ProcessingInstruction* pi) |
+ : V8AbstractEventListener(false, scriptState) |
+ , m_processingInstruction(pi) |
+ { |
+ } |
+ |
+ virtual v8::Local<v8::Value> callListenerFunction(v8::Handle<v8::Value> jsevent, Event*) |
+ { |
+ ASSERT_NOT_REACHED(); |
+ return v8::Local<v8::Value>(); |
+ } |
+ |
+ RefPtrWillBePersistent<ProcessingInstruction> m_processingInstruction; |
+}; |
+ |
+DocumentXSLT::DocumentXSLT() |
+ : m_transformSourceDocument(nullptr) |
+{ |
+} |
+ |
+void DocumentXSLT::applyXSLTransform(Document& document, ProcessingInstruction* pi) |
+{ |
+ ASSERT(!pi->isLoading()); |
+ UseCounter::count(document, UseCounter::XSLProcessingInstruction); |
+ RefPtrWillBeRawPtr<XSLTProcessor> processor = XSLTProcessor::create(document); |
+ processor->setXSLStyleSheet(toXSLStyleSheet(pi->sheet())); |
+ String resultMIMEType; |
+ String newSource; |
+ String resultEncoding; |
+ document.setParsingState(Document::Parsing); |
+ if (!processor->transformToString(&document, resultMIMEType, newSource, resultEncoding)) { |
+ document.setParsingState(Document::FinishedParsing); |
+ return; |
+ } |
+ // FIXME: If the transform failed we should probably report an error (like Mozilla does). |
+ LocalFrame* ownerFrame = document.frame(); |
+ processor->createDocumentFromSource(newSource, resultEncoding, resultMIMEType, &document, ownerFrame); |
+ InspectorInstrumentation::frameDocumentUpdated(ownerFrame); |
+ document.setParsingState(Document::FinishedParsing); |
+} |
+ |
+ProcessingInstruction* DocumentXSLT::findXSLStyleSheet(Document& document) |
+{ |
+ for (Node* node = document.firstChild(); node; node = node->nextSibling()) { |
+ if (node->nodeType() != Node::PROCESSING_INSTRUCTION_NODE) |
+ continue; |
+ |
+ ProcessingInstruction* pi = toProcessingInstruction(node); |
+ if (pi->isXSL()) |
+ return pi; |
+ } |
+ return 0; |
+} |
+ |
+bool DocumentXSLT::processingInstructionInsertedIntoDocument(Document& document, ProcessingInstruction* pi) |
+{ |
+ if (!pi->isXSL()) |
+ return false; |
+ |
+ if (!RuntimeEnabledFeatures::xsltEnabled() || !document.frame()) |
+ return true; |
+ |
+ ScriptState* scriptState = ScriptState::forMainWorld(document.frame()); |
+ RefPtr<EventListener> listener = DOMContentLoadedListener::create(scriptState, pi); |
+ document.addEventListener(EventTypeNames::DOMContentLoaded, listener, false); |
+ ASSERT(!pi->eventListenerForXSLT()); |
+ pi->setEventListenerForXSLT(listener); |
+ return true; |
+} |
+ |
+bool DocumentXSLT::processingInstructionRemovedFromDocument(Document& document, ProcessingInstruction* pi) |
+{ |
+ if (!pi->isXSL()) |
+ return false; |
+ |
+ if (!pi->eventListenerForXSLT()) |
+ return true; |
+ |
+ ASSERT(RuntimeEnabledFeatures::xsltEnabled()); |
+ document.removeEventListener(EventTypeNames::DOMContentLoaded, pi->eventListenerForXSLT(), false); |
+ pi->clearEventListenerForXSLT(); |
+ return true; |
+} |
+ |
+bool DocumentXSLT::sheetLoaded(Document& document, ProcessingInstruction* pi) |
+{ |
+ if (!pi->isXSL()) |
+ return false; |
+ |
+ if (RuntimeEnabledFeatures::xsltEnabled() && !document.parsing() && !pi->isLoading() |
+ && !DocumentXSLT::hasTransformSourceDocument(document)) { |
+ if (findXSLStyleSheet(document) == pi) |
+ applyXSLTransform(document, pi); |
+ } |
+ return true; |
+} |
+ |
+const char* DocumentXSLT::supplementName() |
+{ |
+ return "DocumentXSLT"; |
+} |
+ |
+bool DocumentXSLT::hasTransformSourceDocument(Document& document) |
+{ |
+ return static_cast<DocumentXSLT*>(DocumentSupplement::from(document, supplementName())); |
+} |
+ |
+ |
+DocumentXSLT& DocumentXSLT::from(DocumentSupplementable& document) |
+{ |
+ DocumentXSLT* supplement = static_cast<DocumentXSLT*>(DocumentSupplement::from(document, supplementName())); |
+ if (!supplement) { |
+ supplement = new DocumentXSLT(); |
+ DocumentSupplement::provideTo(document, supplementName(), adoptPtrWillBeNoop(supplement)); |
+ } |
+ return *supplement; |
+} |
+ |
+void DocumentXSLT::trace(Visitor* visitor) |
+{ |
+ visitor->trace(m_transformSourceDocument); |
+ DocumentSupplement::trace(visitor); |
+} |
+ |
+} // namespace blink |