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// Copyright (c) 2009 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 "chrome/renderer/extensions/extension_process_bindings.h"
#include "base/singleton.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/url_constants.h"
#include "chrome/renderer/extensions/bindings_utils.h"
#include "chrome/renderer/extensions/event_bindings.h"
#include "chrome/renderer/extensions/renderer_extension_bindings.h"
#include "chrome/renderer/js_only_v8_extensions.h"
#include "chrome/renderer/render_view.h"
#include "grit/renderer_resources.h"
#include "webkit/glue/webframe.h"
using bindings_utils::GetStringResource;
using bindings_utils::ContextInfo;
using bindings_utils::ContextList;
using bindings_utils::GetContexts;
using bindings_utils::GetPendingRequestMap;
using bindings_utils::PendingRequest;
using bindings_utils::ExtensionBase;
namespace {
const char kExtensionName[] = "chrome/ExtensionProcessBindings";
const char* kExtensionDeps[] = {
BaseJsV8Extension::kName,
EventBindings::kName,
JsonSchemaJsV8Extension::kName,
RendererExtensionBindings::kName,
};
struct SingletonData {
std::set<std::string> function_names_;
};
static std::set<std::string>* GetFunctionNameSet() {
return &Singleton<SingletonData>()->function_names_;
}
class ExtensionImpl : public ExtensionBase {
public:
ExtensionImpl() : ExtensionBase(
kExtensionName, GetStringResource<IDR_EXTENSION_PROCESS_BINDINGS_JS>(),
arraysize(kExtensionDeps), kExtensionDeps) {}
static void SetFunctionNames(const std::vector<std::string>& names) {
std::set<std::string>* name_set = GetFunctionNameSet();
for (size_t i = 0; i < names.size(); ++i) {
name_set->insert(names[i]);
}
}
virtual v8::Handle<v8::FunctionTemplate> GetNativeFunction(
v8::Handle<v8::String> name) {
std::set<std::string>* names = GetFunctionNameSet();
if (name->Equals(v8::String::New("GetViews"))) {
return v8::FunctionTemplate::New(GetViews);
} else if (name->Equals(v8::String::New("GetNextRequestId"))) {
return v8::FunctionTemplate::New(GetNextRequestId);
} else if (names->find(*v8::String::AsciiValue(name)) != names->end()) {
return v8::FunctionTemplate::New(StartRequest, name);
}
return ExtensionBase::GetNativeFunction(name);
}
private:
static v8::Handle<v8::Value> GetViews(const v8::Arguments& args) {
RenderView* renderview = bindings_utils::GetRenderViewForCurrentContext();
DCHECK(renderview);
GURL url = renderview->webview()->GetMainFrame()->GetURL();
std::string extension_id = url.host();
ContextList contexts =
bindings_utils::GetContextsForExtension(extension_id);
DCHECK(contexts.size() > 0);
v8::Local<v8::Array> views = v8::Array::New(contexts.size());
int index = 0;
ContextList::const_iterator it = contexts.begin();
for (; it != contexts.end(); ++it) {
v8::Local<v8::Value> window = (*it)->context->Global()->Get(
v8::String::New("window"));
DCHECK(!window.IsEmpty());
views->Set(v8::Integer::New(index), window);
index++;
}
return views;
}
static v8::Handle<v8::Value> GetNextRequestId(const v8::Arguments& args) {
static int next_request_id = 0;
return v8::Integer::New(next_request_id++);
}
// Starts an API request to the browser, with an optional callback. The
// callback will be dispatched to EventBindings::HandleResponse.
static v8::Handle<v8::Value> StartRequest(const v8::Arguments& args) {
// Get the current RenderView so that we can send a routed IPC message from
// the correct source.
RenderView* renderview = bindings_utils::GetRenderViewForCurrentContext();
if (!renderview)
return v8::Undefined();
if (args.Length() != 3 || !args[0]->IsString() || !args[1]->IsInt32() ||
!args[2]->IsBoolean())
return v8::Undefined();
std::string name = *v8::String::AsciiValue(args.Data());
std::string json_args = *v8::String::Utf8Value(args[0]);
int request_id = args[1]->Int32Value();
bool has_callback = args[2]->BooleanValue();
v8::Persistent<v8::Context> current_context =
v8::Persistent<v8::Context>::New(v8::Context::GetCurrent());
DCHECK(!current_context.IsEmpty());
GetPendingRequestMap()[request_id].reset(new PendingRequest(
current_context, *v8::String::AsciiValue(args.Data())));
renderview->SendExtensionRequest(name, json_args, request_id, has_callback);
return v8::Undefined();
}
};
} // namespace
v8::Extension* ExtensionProcessBindings::Get() {
return new ExtensionImpl();
}
void ExtensionProcessBindings::SetFunctionNames(
const std::vector<std::string>& names) {
ExtensionImpl::SetFunctionNames(names);
}
// static
void ExtensionProcessBindings::HandleResponse(int request_id, bool success,
const std::string& response,
const std::string& error) {
PendingRequest* request = GetPendingRequestMap()[request_id].get();
if (!request)
return; // The frame went away.
v8::HandleScope handle_scope;
v8::Handle<v8::Value> argv[5];
argv[0] = v8::Integer::New(request_id);
argv[1] = v8::String::New(request->name.c_str());
argv[2] = v8::Boolean::New(success);
argv[3] = v8::String::New(response.c_str());
argv[4] = v8::String::New(error.c_str());
bindings_utils::CallFunctionInContext(
request->context, "handleResponse", arraysize(argv), argv);
GetPendingRequestMap().erase(request_id);
}
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