WIP enum / V8PerContextData solution

Source/bindings/v8/V8PerContextDebugData.h

+/*
+ * Copyright (C) 2012 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 THE COPYRIGHT
+ * OWNER 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.
+ */
+
+#ifndef V8PerContextDebugData_h
+#define V8PerContextDebugData_h
+
+#include <v8.h>
+
+namespace WebCore {
+
+enum V8ContextEmbedderDataField {
+    v8ContextDebugIdIndex,
+    v8ContextPerContextDataIndex,
+    v8ContextIsolatedWorld,
+    v8ContextCreatorIndex
+    // Rather than adding more embedder data fields to v8::Context,
+    // consider adding the data to V8PerContextData instead.
+};
+
+// The web-origin of JavaScript source
+enum CompilationOriginCategory {
+    CompilationOriginWeb, 
+    CompilationOriginExtension,
+    CompilationOriginDevtools,
+    CompilationOriginSystem
+};
+
+// The target context of JavaScript source
+enum CompilationContextCategory {
+    CompilationContextWebPage,
+    CompilationContextContentScript,
+    CompilationContextUnprivilegedExtension,
+    CompilationContextPrivilegedExtension,
+    CompilationContextDevtools,
+    CompilationContextUtility
+};
+
+enum CompilationRestrictions {
+    CompilationRestrictionsNone,
+    CompilationRestrictionsEval,  // issues with naming source and numbering lines
+    CompilationRestrictionsOneFunction,  // one function must result
+    CompilationRestrictionsAttributeSetEventHandler // one function must result
+};
+
+// Common combinations used in V8ScopedCompilation
+enum ScopedCompilationCategory {
+    DevtoolsScriptCompilation,      // Devtools, WebPage, None
+    DevtoolsFunctionCompilation,  // Devtools, WebPage, OneFunction
+    ExtensionAPICompilation         // System, WebPage, None
+};
+
+// ---- Permanent marks on the context ----
+class V8PerContextDebugData {
+public:
+    // Web, WebPage, None
+    static void setDebugDataForPage(v8::Handle<v8::Context>, int debugId);
+    // Extension, ContentScript, None
+    static void setDebugDataForContentScript(v8::Handle<v8::Context>, int debugId);
+    // System, Utility, None
+    static void setDebugDataForSystemUtility(v8::Handle<v8::Context>);
+
+    static int debugId(v8::Handle<v8::Context>);
+    static CompilationOriginCategory compilationOriginCategory(v8::Handle<v8::Context>);
+    static CompilationContextCategory compilationContextCategory(v8::Handle<v8::Context>);
+    static CompilationRestrictions compilationRestrictions(v8::Handle<v8::Context>);
+
+private:
+    friend class V8ScopedCompilation;
+    static void setDebugData(
+        v8::Handle<v8::Context> context, 
+        CompilationOriginCategory originCategory, 
+        CompilationContextCategory contextCategory, 
+        CompilationRestrictions restrictions,
+        int debugId); 
+};
+
+// ---- Transient marks that unset when we leave the scope
+class V8ScopedCompilation {
+public:
+    V8ScopedCompilation(v8::Handle<v8::Context>, ScopedCompilationCategory);
+    V8ScopedCompilation(v8::Handle<v8::Context>, CompilationOriginCategory, CompilationContextCategory, CompilationRestrictions);
+    ~V8ScopedCompilation();
+
+private:
+    void init(CompilationOriginCategory, CompilationContextCategory, CompilationRestrictions);
+    v8::Persistent<v8::Context> m_context;
+    CompilationOriginCategory m_originCategory;
+    CompilationContextCategory m_contextCategory;
+    CompilationRestrictions m_restrictions;
+    int m_debugId;   
+};
+
+} // namespace WebCore
+
+#endif // V8PerContextDebugData_h