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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 "chrome/browser/prerender/prerender_pending_swap_throttle.h"
#include "chrome/browser/prerender/prerender_final_status.h"
#include "chrome/browser/prerender/prerender_manager.h"
#include "chrome/browser/prerender/prerender_tracker.h"
#include "chrome/browser/prerender/prerender_util.h"
#include "content/public/browser/resource_controller.h"
#include "content/public/browser/resource_request_info.h"
#include "net/url_request/url_request.h"
using content::ResourceType;
namespace prerender {
PrerenderPendingSwapThrottle::PrerenderPendingSwapThrottle(
net::URLRequest* request,
PrerenderTracker* tracker)
: request_(request),
tracker_(tracker),
throttled_(false) {
}
void PrerenderPendingSwapThrottle::WillStartRequest(bool* defer) {
DCHECK(!throttled_);
const content::ResourceRequestInfo* info =
content::ResourceRequestInfo::ForRequest(request_);
// We only care about main frame loads.
if (info->GetResourceType() != content::RESOURCE_TYPE_MAIN_FRAME)
return;
int render_process_id = info->GetChildID();
int render_frame_id = info->GetRenderFrameID();
// Check if this request is for a URL we intend to swap in.
if (!tracker_->IsPendingSwapRequestOnIOThread(
render_process_id, render_frame_id, request_->url())) {
return;
}
*defer = true;
throttled_ = true;
tracker_->AddPendingSwapThrottleOnIOThread(
render_process_id, render_frame_id, request_->url(), this->AsWeakPtr());
}
const char* PrerenderPendingSwapThrottle::GetNameForLogging() const {
return "PrerenderPendingSwapThrottle";
}
void PrerenderPendingSwapThrottle::Resume() {
DCHECK(throttled_);
throttled_ = false;
controller()->Resume();
}
void PrerenderPendingSwapThrottle::Cancel() {
DCHECK(throttled_);
throttled_ = false;
controller()->Cancel();
}
} // namespace prerender
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