third_party/WebKit/Source/platform/v8_inspector/JavaScriptCallFrame.cpp

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#include "platform/v8_inspector/JavaScriptCallFrame.h"

#include "platform/v8_inspector/StringUtil.h"
#include "platform/v8_inspector/V8Compat.h"

#include <v8-debug.h>

namespace v8_inspector {

JavaScriptCallFrame::JavaScriptCallFrame(v8::Local<v8::Context> debuggerContext, v8::Local<v8::Object> callFrame)
    : m_isolate(debuggerContext->GetIsolate())
    , m_debuggerContext(m_isolate, debuggerContext)
    , m_callFrame(m_isolate, callFrame)
{
}

JavaScriptCallFrame::~JavaScriptCallFrame()
{
}

int JavaScriptCallFrame::callV8FunctionReturnInt(const char* name) const
{
    v8::HandleScope handleScope(m_isolate);
    v8::MicrotasksScope microtasks(m_isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
    v8::Local<v8::Context> context = v8::Local<v8::Context>::New(m_isolate, m_debuggerContext);
    v8::Local<v8::Object> callFrame = v8::Local<v8::Object>::New(m_isolate, m_callFrame);
    v8::Local<v8::Function> func = v8::Local<v8::Function>::Cast(callFrame->Get(toV8StringInternalized(m_isolate, name)));
    v8::Local<v8::Value> result;
    if (!func->Call(context, callFrame, 0, nullptr).ToLocal(&result) || !result->IsInt32())
        return 0;
    return result.As<v8::Int32>()->Value();
}

int JavaScriptCallFrame::sourceID() const
{
    return callV8FunctionReturnInt("sourceID");
}

int JavaScriptCallFrame::line() const
{
    return callV8FunctionReturnInt("line");
}

int JavaScriptCallFrame::column() const
{
    return callV8FunctionReturnInt("column");
}

int JavaScriptCallFrame::contextId() const
{
    return callV8FunctionReturnInt("contextId");
}

bool JavaScriptCallFrame::isAtReturn() const
{
    v8::HandleScope handleScope(m_isolate);
    v8::Local<v8::Value> result = v8::Local<v8::Object>::New(m_isolate, m_callFrame)->Get(toV8StringInternalized(m_isolate, "isAtReturn"));
    if (result.IsEmpty() || !result->IsBoolean())
        return false;
    return result->BooleanValue();
}

v8::Local<v8::Object> JavaScriptCallFrame::details() const
{
    v8::MicrotasksScope microtasks(m_isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
    v8::Local<v8::Object> callFrame = v8::Local<v8::Object>::New(m_isolate, m_callFrame);
    v8::Local<v8::Function> func = v8::Local<v8::Function>::Cast(callFrame->Get(toV8StringInternalized(m_isolate, "details")));
    return v8::Local<v8::Object>::Cast(func->Call(m_debuggerContext.Get(m_isolate), callFrame, 0, nullptr).ToLocalChecked());
}

v8::MaybeLocal<v8::Value> JavaScriptCallFrame::evaluate(v8::Local<v8::Value> expression)
{
    v8::MicrotasksScope microtasks(m_isolate, v8::MicrotasksScope::kRunMicrotasks);
    v8::Local<v8::Object> callFrame = v8::Local<v8::Object>::New(m_isolate, m_callFrame);
    v8::Local<v8::Function> evalFunction = v8::Local<v8::Function>::Cast(callFrame->Get(toV8StringInternalized(m_isolate, "evaluate")));
    return evalFunction->Call(m_debuggerContext.Get(m_isolate), callFrame, 1, &expression);
}

v8::MaybeLocal<v8::Value> JavaScriptCallFrame::restart()
{
    v8::MicrotasksScope microtasks(m_isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
    v8::Local<v8::Object> callFrame = v8::Local<v8::Object>::New(m_isolate, m_callFrame);
    v8::Local<v8::Function> restartFunction = v8::Local<v8::Function>::Cast(callFrame->Get(toV8StringInternalized(m_isolate, "restart")));
    v8::Debug::SetLiveEditEnabled(m_isolate, true);
    v8::MaybeLocal<v8::Value> result = restartFunction->Call(m_debuggerContext.Get(m_isolate), callFrame, 0, nullptr);
    v8::Debug::SetLiveEditEnabled(m_isolate, false);
    return result;
}

v8::MaybeLocal<v8::Value> JavaScriptCallFrame::setVariableValue(int scopeNumber, v8::Local<v8::Value> variableName, v8::Local<v8::Value> newValue)
{
    v8::MicrotasksScope microtasks(m_isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
    v8::Local<v8::Object> callFrame = v8::Local<v8::Object>::New(m_isolate, m_callFrame);
    v8::Local<v8::Function> setVariableValueFunction = v8::Local<v8::Function>::Cast(callFrame->Get(toV8StringInternalized(m_isolate, "setVariableValue")));
    v8::Local<v8::Value> argv[] = {
        v8::Local<v8::Value>(v8::Integer::New(m_isolate, scopeNumber)),
        variableName,
        newValue
    };
    return setVariableValueFunction->Call(m_debuggerContext.Get(m_isolate), callFrame, V8_INSPECTOR_ARRAY_LENGTH(argv), argv);
}

} // namespace v8_inspector