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// Copyright (c) 2011 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/browser/download/download_request_handle.h"
#include "base/bind.h"
#include "base/stringprintf.h"
#include "content/browser/browser_context.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/browser/renderer_host/resource_dispatcher_host.h"
#include "content/browser/tab_contents/tab_contents.h"
#include "content/public/browser/browser_thread.h"
using content::BrowserThread;
// IO Thread indirections to resource dispatcher host.
// Provided as targets for PostTask from within this object
// only.
static void ResourceDispatcherHostPauseRequest(
ResourceDispatcherHost* rdh,
int process_unique_id,
int request_id,
bool pause) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
rdh->PauseRequest(process_unique_id, request_id, pause);
}
static void ResourceDispatcherHostCancelRequest(
ResourceDispatcherHost* rdh,
int process_unique_id,
int request_id) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
rdh->CancelRequest(process_unique_id, request_id, false);
}
DownloadRequestHandle::DownloadRequestHandle()
: rdh_(NULL),
child_id_(-1),
render_view_id_(-1),
request_id_(-1) {
}
DownloadRequestHandle::DownloadRequestHandle(ResourceDispatcherHost* rdh,
int child_id,
int render_view_id,
int request_id)
: rdh_(rdh),
child_id_(child_id),
render_view_id_(render_view_id),
request_id_(request_id) {
// ResourceDispatcherHost should not be null for non-default instances
// of DownloadRequestHandle.
DCHECK(rdh);
}
TabContents* DownloadRequestHandle::GetTabContents() const {
RenderViewHost* render_view_host =
RenderViewHost::FromID(child_id_, render_view_id_);
if (!render_view_host)
return NULL;
return render_view_host->delegate()->GetAsTabContents();
}
DownloadManager* DownloadRequestHandle::GetDownloadManager() const {
RenderViewHost* rvh = RenderViewHost::FromID(child_id_, render_view_id_);
if (rvh == NULL)
return NULL;
RenderProcessHost* rph = rvh->process();
if (rph == NULL)
return NULL;
content::BrowserContext* context = rph->browser_context();
if (context == NULL)
return NULL;
return context->GetDownloadManager();
}
void DownloadRequestHandle::PauseRequest() const {
// The post is safe because ResourceDispatcherHost is guaranteed
// to outlive the IO thread.
if (rdh_) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&ResourceDispatcherHostPauseRequest,
rdh_, child_id_, request_id_, true));
}
}
void DownloadRequestHandle::ResumeRequest() const {
// The post is safe because ResourceDispatcherHost is guaranteed
// to outlive the IO thread.
if (rdh_) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&ResourceDispatcherHostPauseRequest,
rdh_, child_id_, request_id_, false));
}
}
void DownloadRequestHandle::CancelRequest() const {
// The post is safe because ResourceDispatcherHost is guaranteed
// to outlive the IO thread.
if (rdh_) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&ResourceDispatcherHostCancelRequest,
rdh_, child_id_, request_id_));
}
}
std::string DownloadRequestHandle::DebugString() const {
return base::StringPrintf("{"
" child_id = %d"
" render_view_id = %d"
" request_id = %d"
"}",
child_id_,
render_view_id_,
request_id_);
}
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