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// 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 "extensions/renderer/console.h"
#include "base/compiler_specific.h"
#include "base/debug/alias.h"
#include "base/lazy_instance.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "content/public/renderer/render_view.h"
#include "content/public/renderer/render_view_visitor.h"
#include "extensions/renderer/dispatcher.h"
#include "extensions/renderer/extension_helper.h"
#include "third_party/WebKit/public/web/WebConsoleMessage.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "third_party/WebKit/public/web/WebView.h"
namespace extensions {
namespace console {
namespace {
// Finds the RenderView associated with a context. Note: there will be multiple
// contexts in each RenderView.
class ByContextFinder : public content::RenderViewVisitor {
public:
static content::RenderView* Find(v8::Handle<v8::Context> context) {
ByContextFinder finder(context);
content::RenderView::ForEach(&finder);
return finder.found_;
}
private:
explicit ByContextFinder(v8::Handle<v8::Context> context)
: context_(context), found_(NULL) {}
virtual bool Visit(content::RenderView* render_view) override {
ExtensionHelper* helper = ExtensionHelper::Get(render_view);
if (helper &&
helper->dispatcher()->script_context_set().GetByV8Context(context_)) {
found_ = render_view;
}
return !found_;
}
v8::Handle<v8::Context> context_;
content::RenderView* found_;
DISALLOW_COPY_AND_ASSIGN(ByContextFinder);
};
// Writes |message| to stack to show up in minidump, then crashes.
void CheckWithMinidump(const std::string& message) {
char minidump[1024];
base::debug::Alias(&minidump);
base::snprintf(
minidump, arraysize(minidump), "e::console: %s", message.c_str());
CHECK(false) << message;
}
typedef void (*LogMethod)(v8::Handle<v8::Context> context,
const std::string& message);
void BoundLogMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info) {
LogMethod log_method =
reinterpret_cast<LogMethod>(info.Data().As<v8::External>()->Value());
std::string message;
for (int i = 0; i < info.Length(); ++i) {
if (i > 0)
message += " ";
message += *v8::String::Utf8Value(info[i]);
}
(*log_method)(info.GetIsolate()->GetCallingContext(), message);
}
void BindLogMethod(v8::Isolate* isolate,
v8::Local<v8::Object> target,
const std::string& name,
LogMethod log_method) {
v8::Local<v8::FunctionTemplate> tmpl = v8::FunctionTemplate::New(
isolate,
&BoundLogMethodCallback,
v8::External::New(isolate, reinterpret_cast<void*>(log_method)));
target->Set(v8::String::NewFromUtf8(isolate, name.c_str()),
tmpl->GetFunction());
}
} // namespace
void Debug(content::RenderView* render_view, const std::string& message) {
AddMessage(render_view, content::CONSOLE_MESSAGE_LEVEL_DEBUG, message);
}
void Log(content::RenderView* render_view, const std::string& message) {
AddMessage(render_view, content::CONSOLE_MESSAGE_LEVEL_LOG, message);
}
void Warn(content::RenderView* render_view, const std::string& message) {
AddMessage(render_view, content::CONSOLE_MESSAGE_LEVEL_WARNING, message);
}
void Error(content::RenderView* render_view, const std::string& message) {
AddMessage(render_view, content::CONSOLE_MESSAGE_LEVEL_ERROR, message);
}
void Fatal(content::RenderView* render_view, const std::string& message) {
Error(render_view, message);
CheckWithMinidump(message);
}
void AddMessage(content::RenderView* render_view,
content::ConsoleMessageLevel level,
const std::string& message) {
blink::WebView* web_view = render_view->GetWebView();
if (!web_view || !web_view->mainFrame())
return;
blink::WebConsoleMessage::Level target_level =
blink::WebConsoleMessage::LevelLog;
switch (level) {
case content::CONSOLE_MESSAGE_LEVEL_DEBUG:
target_level = blink::WebConsoleMessage::LevelDebug;
break;
case content::CONSOLE_MESSAGE_LEVEL_LOG:
target_level = blink::WebConsoleMessage::LevelLog;
break;
case content::CONSOLE_MESSAGE_LEVEL_WARNING:
target_level = blink::WebConsoleMessage::LevelWarning;
break;
case content::CONSOLE_MESSAGE_LEVEL_ERROR:
target_level = blink::WebConsoleMessage::LevelError;
break;
}
web_view->mainFrame()->addMessageToConsole(
blink::WebConsoleMessage(target_level, base::UTF8ToUTF16(message)));
}
void Debug(v8::Handle<v8::Context> context, const std::string& message) {
AddMessage(context, content::CONSOLE_MESSAGE_LEVEL_DEBUG, message);
}
void Log(v8::Handle<v8::Context> context, const std::string& message) {
AddMessage(context, content::CONSOLE_MESSAGE_LEVEL_LOG, message);
}
void Warn(v8::Handle<v8::Context> context, const std::string& message) {
AddMessage(context, content::CONSOLE_MESSAGE_LEVEL_WARNING, message);
}
void Error(v8::Handle<v8::Context> context, const std::string& message) {
AddMessage(context, content::CONSOLE_MESSAGE_LEVEL_ERROR, message);
}
void Fatal(v8::Handle<v8::Context> context, const std::string& message) {
Error(context, message);
CheckWithMinidump(message);
}
void AddMessage(v8::Handle<v8::Context> context,
content::ConsoleMessageLevel level,
const std::string& message) {
if (context.IsEmpty()) {
LOG(WARNING) << "Could not log \"" << message << "\": no context given";
return;
}
content::RenderView* render_view = ByContextFinder::Find(context);
if (!render_view) {
LOG(WARNING) << "Could not log \"" << message << "\": no render view found";
return;
}
AddMessage(render_view, level, message);
}
v8::Local<v8::Object> AsV8Object() {
v8::Isolate* isolate = v8::Isolate::GetCurrent();
v8::EscapableHandleScope handle_scope(isolate);
v8::Local<v8::Object> console_object = v8::Object::New(isolate);
BindLogMethod(isolate, console_object, "debug", &Debug);
BindLogMethod(isolate, console_object, "log", &Log);
BindLogMethod(isolate, console_object, "warn", &Warn);
BindLogMethod(isolate, console_object, "error", &Error);
return handle_scope.Escape(console_object);
}
} // namespace console
} // namespace extensions
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