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// Copyright 2013 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 "content/renderer/pepper/resource_converter.h"
#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "content/public/renderer/renderer_ppapi_host.h"
#include "content/renderer/pepper/pepper_file_system_host.h"
#include "ipc/ipc_message.h"
#include "ppapi/host/ppapi_host.h"
#include "ppapi/host/resource_host.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/shared_impl/resource_var.h"
#include "ppapi/shared_impl/scoped_pp_var.h"
#include "third_party/WebKit/public/platform/WebFileSystem.h"
#include "third_party/WebKit/public/web/WebDOMFileSystem.h"
namespace {
void FlushComplete(
const base::Callback<void(bool)>& callback,
const std::vector<scoped_refptr<content::HostResourceVar> >& browser_vars,
const std::vector<int>& pending_host_ids) {
CHECK(browser_vars.size() == pending_host_ids.size());
for (size_t i = 0; i < browser_vars.size(); ++i) {
browser_vars[i]->set_pending_browser_host_id(pending_host_ids[i]);
}
callback.Run(true);
}
// Converts a blink::WebFileSystem::Type to a PP_FileSystemType.
PP_FileSystemType WebFileSystemTypeToPPAPI(blink::WebFileSystem::Type type) {
switch (type) {
case blink::WebFileSystem::TypeTemporary:
return PP_FILESYSTEMTYPE_LOCALTEMPORARY;
case blink::WebFileSystem::TypePersistent:
return PP_FILESYSTEMTYPE_LOCALPERSISTENT;
case blink::WebFileSystem::TypeIsolated:
return PP_FILESYSTEMTYPE_ISOLATED;
case blink::WebFileSystem::TypeExternal:
return PP_FILESYSTEMTYPE_EXTERNAL;
default:
NOTREACHED();
return PP_FILESYSTEMTYPE_LOCALTEMPORARY;
}
}
// Given a V8 value containing a DOMFileSystem, creates a resource host and
// returns the resource information for serialization.
// On error, false.
bool DOMFileSystemToResource(
PP_Instance instance,
content::RendererPpapiHost* host,
const blink::WebDOMFileSystem& dom_file_system,
int* pending_renderer_id,
scoped_ptr<IPC::Message>* create_message,
scoped_ptr<IPC::Message>* browser_host_create_message) {
DCHECK(!dom_file_system.isNull());
PP_FileSystemType file_system_type =
WebFileSystemTypeToPPAPI(dom_file_system.type());
GURL root_url = dom_file_system.rootURL();
// External file systems are not currently supported. (Without this check,
// there would be a CHECK-fail in FileRefResource.)
// TODO(mgiuca): Support external file systems.
if (file_system_type == PP_FILESYSTEMTYPE_EXTERNAL)
return false;
*pending_renderer_id = host->GetPpapiHost()->AddPendingResourceHost(
scoped_ptr<ppapi::host::ResourceHost>(
new content::PepperFileSystemHost(host, instance, 0, root_url,
file_system_type)));
if (*pending_renderer_id == 0)
return false;
create_message->reset(
new PpapiPluginMsg_FileSystem_CreateFromPendingHost(file_system_type));
browser_host_create_message->reset(
new PpapiHostMsg_FileSystem_CreateFromRenderer(root_url.spec(),
file_system_type));
return true;
}
} // namespace
namespace content {
ResourceConverter::~ResourceConverter() {}
ResourceConverterImpl::ResourceConverterImpl(PP_Instance instance,
RendererPpapiHost* host)
: instance_(instance),
host_(host) {
}
ResourceConverterImpl::~ResourceConverterImpl() {
// Verify Flush() was called.
DCHECK(browser_host_create_messages_.empty());
DCHECK(browser_vars.empty());
}
bool ResourceConverterImpl::FromV8Value(v8::Handle<v8::Object> val,
v8::Handle<v8::Context> context,
PP_Var* result,
bool* was_resource) {
v8::Context::Scope context_scope(context);
v8::HandleScope handle_scope(context->GetIsolate());
*was_resource = false;
blink::WebDOMFileSystem dom_file_system =
blink::WebDOMFileSystem::fromV8Value(val);
if (!dom_file_system.isNull()) {
int pending_renderer_id;
scoped_ptr<IPC::Message> create_message;
scoped_ptr<IPC::Message> browser_host_create_message;
if (!DOMFileSystemToResource(instance_, host_, dom_file_system,
&pending_renderer_id, &create_message,
&browser_host_create_message)) {
return false;
}
DCHECK(create_message);
DCHECK(browser_host_create_message);
scoped_refptr<HostResourceVar> result_var =
CreateResourceVarWithBrowserHost(
pending_renderer_id, *create_message, *browser_host_create_message);
*result = result_var->GetPPVar();
*was_resource = true;
return true;
}
// The value was not convertible to a resource. Return true with
// |was_resource| set to false. As per the interface of FromV8Value, |result|
// may be left unmodified in this case.
return true;
}
void ResourceConverterImpl::Flush(const base::Callback<void(bool)>& callback) {
host_->CreateBrowserResourceHosts(
instance_,
browser_host_create_messages_,
base::Bind(&FlushComplete, callback, browser_vars));
browser_host_create_messages_.clear();
browser_vars.clear();
}
scoped_refptr<HostResourceVar> ResourceConverterImpl::CreateResourceVar(
int pending_renderer_id,
const IPC::Message& create_message) {
return new HostResourceVar(pending_renderer_id, create_message);
}
scoped_refptr<HostResourceVar>
ResourceConverterImpl::CreateResourceVarWithBrowserHost(
int pending_renderer_id,
const IPC::Message& create_message,
const IPC::Message& browser_host_create_message) {
scoped_refptr<HostResourceVar> result =
CreateResourceVar(pending_renderer_id, create_message);
browser_host_create_messages_.push_back(browser_host_create_message);
browser_vars.push_back(result);
return result;
}
} // namespace content
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