Bring back ScriptDebugServer and associated machinery

sky/engine/core/inspector/JavaScriptCallFrame.cpp

+/*
+ * Copyright (c) 2010, 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.
+ */
+
+#include "config.h"
+#include "core/inspector/JavaScriptCallFrame.h"
+
+#include "bindings/core/v8/ScriptValue.h"
+#include "bindings/core/v8/V8Binding.h"
+#include <v8-debug.h>
+
+namespace blink {
+
+JavaScriptCallFrame::JavaScriptCallFrame(v8::Handle<v8::Context> debuggerContext, v8::Handle<v8::Object> callFrame)
+    : m_isolate(v8::Isolate::GetCurrent())
+    , m_debuggerContext(m_isolate, debuggerContext)
+    , m_callFrame(m_isolate, callFrame)
+{
+}
+
+JavaScriptCallFrame::~JavaScriptCallFrame()
+{
+}
+
+JavaScriptCallFrame* JavaScriptCallFrame::caller()
+{
+    if (!m_caller) {
+        v8::HandleScope handleScope(m_isolate);
+        v8::Handle<v8::Context> debuggerContext = m_debuggerContext.newLocal(m_isolate);
+        v8::Context::Scope contextScope(debuggerContext);
+        v8::Handle<v8::Value> callerFrame = m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "caller"));
+        if (callerFrame.IsEmpty() || !callerFrame->IsObject())
+            return 0;
+        m_caller = JavaScriptCallFrame::create(debuggerContext, v8::Handle<v8::Object>::Cast(callerFrame));
+    }
+    return m_caller.get();
+}
+
+int JavaScriptCallFrame::callV8FunctionReturnInt(const char* name) const
+{
+    v8::HandleScope handleScope(m_isolate);
+    v8::Context::Scope contextScope(m_debuggerContext.newLocal(m_isolate));
+    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
+    v8::Handle<v8::Function> func = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, name)));
+    v8::Handle<v8::Value> result = func->Call(callFrame, 0, 0);
+    if (result.IsEmpty() || !result->IsInt32())
+        return 0;
+    return result->Int32Value();
+}
+
+String JavaScriptCallFrame::callV8FunctionReturnString(const char* name) const
+{
+    v8::HandleScope handleScope(m_isolate);
+    v8::Context::Scope contextScope(m_debuggerContext.newLocal(m_isolate));
+    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
+    v8::Handle<v8::Function> func = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, name)));
+    v8::Handle<v8::Value> result = func->Call(callFrame, 0, 0);
+    return toCoreStringWithUndefinedOrNullCheck(result);
+}
+
+int JavaScriptCallFrame::sourceID() const
+{
+    return callV8FunctionReturnInt("sourceID");
+}
+
+int JavaScriptCallFrame::line() const
+{
+    return callV8FunctionReturnInt("line");
+}
+
+int JavaScriptCallFrame::column() const
+{
+    return callV8FunctionReturnInt("column");
+}
+
+String JavaScriptCallFrame::scriptName() const
+{
+    return callV8FunctionReturnString("scriptName");
+}
+
+String JavaScriptCallFrame::functionName() const
+{
+    return callV8FunctionReturnString("functionName");
+}
+
+v8::Handle<v8::Value> JavaScriptCallFrame::scopeChain() const
+{
+    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
+    v8::Handle<v8::Function> func = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, "scopeChain")));
+    v8::Handle<v8::Array> scopeChain = v8::Handle<v8::Array>::Cast(func->Call(callFrame, 0, 0));
+    v8::Handle<v8::Array> result = v8::Array::New(m_isolate, scopeChain->Length());
+    for (uint32_t i = 0; i < scopeChain->Length(); i++)
+        result->Set(i, scopeChain->Get(i));
+    return result;
+}
+
+int JavaScriptCallFrame::scopeType(int scopeIndex) const
+{
+    v8::Handle<v8::Array> scopeType = v8::Handle<v8::Array>::Cast(m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "scopeType")));
+    return scopeType->Get(scopeIndex)->Int32Value();
+}
+
+v8::Handle<v8::Value> JavaScriptCallFrame::thisObject() const
+{
+    return m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "thisObject"));
+}
+
+String JavaScriptCallFrame::stepInPositions() const
+{
+    return callV8FunctionReturnString("stepInPositions");
+}
+
+bool JavaScriptCallFrame::isAtReturn() const
+{
+    v8::HandleScope handleScope(m_isolate);
+    v8::Context::Scope contextScope(m_debuggerContext.newLocal(m_isolate));
+    v8::Handle<v8::Value> result = m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "isAtReturn"));
+    if (result.IsEmpty() || !result->IsBoolean())
+        return false;
+    return result->BooleanValue();
+}
+
+v8::Handle<v8::Value> JavaScriptCallFrame::returnValue() const
+{
+    return m_callFrame.newLocal(m_isolate)->Get(v8AtomicString(m_isolate, "returnValue"));
+}
+
+v8::Handle<v8::Value> JavaScriptCallFrame::evaluateWithExceptionDetails(const String& expression)
+{
+    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
+    v8::Handle<v8::Function> evalFunction = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, "evaluate")));
+    v8::Handle<v8::Value> argv[] = { v8String(m_debuggerContext.newLocal(m_isolate)->GetIsolate(), expression) };
+    v8::TryCatch tryCatch;
+    v8::Handle<v8::Value> result = evalFunction->Call(callFrame, WTF_ARRAY_LENGTH(argv), argv);
+
+    v8::Handle<v8::Object> wrappedResult = v8::Object::New(m_isolate);
+    if (tryCatch.HasCaught()) {
+        wrappedResult->Set(v8::String::NewFromUtf8(m_isolate, "result"), tryCatch.Exception());
+        wrappedResult->Set(v8::String::NewFromUtf8(m_isolate, "exceptionDetails"), createExceptionDetails(tryCatch.Message(), m_isolate));
+    } else {
+        wrappedResult->Set(v8::String::NewFromUtf8(m_isolate, "result"), result);
+        wrappedResult->Set(v8::String::NewFromUtf8(m_isolate, "exceptionDetails"), v8::Undefined(m_isolate));
+    }
+    return wrappedResult;
+}
+
+v8::Handle<v8::Value> JavaScriptCallFrame::restart()
+{
+    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
+    v8::Handle<v8::Function> restartFunction = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, "restart")));
+    v8::Debug::SetLiveEditEnabled(m_isolate, true);
+    v8::Handle<v8::Value> result = restartFunction->Call(callFrame, 0, 0);
+    v8::Debug::SetLiveEditEnabled(m_isolate, false);
+    return result;
+}
+
+ScriptValue JavaScriptCallFrame::setVariableValue(ScriptState* scriptState, int scopeNumber, const String& variableName, const ScriptValue& newValue)
+{
+    ScriptState::Scope scriptScope(scriptState);
+    v8::Handle<v8::Object> callFrame = m_callFrame.newLocal(m_isolate);
+    v8::Handle<v8::Function> setVariableValueFunction = v8::Handle<v8::Function>::Cast(callFrame->Get(v8AtomicString(m_isolate, "setVariableValue")));
+    v8::Handle<v8::Value> argv[] = {
+        v8::Handle<v8::Value>(v8::Integer::New(m_isolate, scopeNumber)),
+        v8String(m_isolate, variableName),
+        newValue.v8Value()
+    };
+    return ScriptValue(scriptState, setVariableValueFunction->Call(callFrame, WTF_ARRAY_LENGTH(argv), argv));
+}
+
+v8::Handle<v8::Object> JavaScriptCallFrame::createExceptionDetails(v8::Handle<v8::Message> message, v8::Isolate* isolate)
+{
+    v8::Handle<v8::Object> exceptionDetails = v8::Object::New(isolate);
+    exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "text"), message->Get());
+    exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "url"), message->GetScriptOrigin().ResourceName());
+    exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "line"), v8::Integer::New(isolate, message->GetLineNumber()));
+    exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "column"), v8::Integer::New(isolate, message->GetStartColumn()));
+    if (!message->GetStackTrace().IsEmpty())
+        exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "stackTrace"), message->GetStackTrace()->AsArray());
+    else
+        exceptionDetails->Set(v8::String::NewFromUtf8(isolate, "stackTrace"), v8::Undefined(isolate));
+    return exceptionDetails;
+}
+
+void JavaScriptCallFrame::trace(Visitor* visitor)
+{
+    visitor->trace(m_caller);
+}
+
+} // namespace blink