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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/public/browser/download_item_utils.h"
#include "base/memory/raw_ptr.h"
#include "components/download/public/common/download_item.h"
#include "content/public/browser/global_routing_id.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
namespace content {
namespace {
// This is a UserData::Data that will be attached to a DownloadItem as a
// side-channel for passing WebContents and BrowserContext.
class DownloadItemData : public base::SupportsUserData::Data,
public WebContentsObserver {
public:
DownloadItemData(BrowserContext* browser_context,
WebContents* web_contents,
GlobalRenderFrameHostId id);
~DownloadItemData() override = default;
static void Attach(download::DownloadItem* download_item,
BrowserContext* browser_context,
WebContents* web_contents,
GlobalRenderFrameHostId id);
static DownloadItemData* Get(const download::DownloadItem* download_item);
static void Detach(download::DownloadItem* download_item);
BrowserContext* browser_context() const { return browser_context_; }
GlobalRenderFrameHostId id() const { return id_; }
private:
// WebContentsObserver methods.
void PrimaryPageChanged(Page& page) override;
void WebContentsDestroyed() override;
static const char kKey[];
raw_ptr<BrowserContext, DanglingUntriaged> browser_context_;
GlobalRenderFrameHostId id_;
};
// static
const char DownloadItemData::kKey[] = "DownloadItemUtils DownloadItemData";
DownloadItemData::DownloadItemData(BrowserContext* browser_context,
WebContents* web_contents,
GlobalRenderFrameHostId id)
: WebContentsObserver(web_contents),
browser_context_(browser_context),
id_(id) {}
// static
void DownloadItemData::Attach(download::DownloadItem* download_item,
BrowserContext* browser_context,
WebContents* web_contents,
GlobalRenderFrameHostId id) {
auto data =
std::make_unique<DownloadItemData>(browser_context, web_contents, id);
download_item->SetUserData(&kKey, std::move(data));
}
// static
DownloadItemData* DownloadItemData::Get(
const download::DownloadItem* download_item) {
return static_cast<DownloadItemData*>(download_item->GetUserData(&kKey));
}
// static
void DownloadItemData::Detach(download::DownloadItem* download_item) {
download_item->RemoveUserData(&kKey);
}
void DownloadItemData::PrimaryPageChanged(Page& page) {
// To prevent reuse of a render in a different primary page,
// DownloadItemUtils::GetWebContents() will return null after the primary page
// changed.
id_ = GlobalRenderFrameHostId();
}
void DownloadItemData::WebContentsDestroyed() {
Observe(nullptr);
id_ = GlobalRenderFrameHostId();
}
} // namespace
// static
BrowserContext* DownloadItemUtils::GetBrowserContext(
const download::DownloadItem* download_item) {
DownloadItemData* data = DownloadItemData::Get(download_item);
if (!data)
return nullptr;
return data->browser_context();
}
// static
WebContents* DownloadItemUtils::GetWebContents(
const download::DownloadItem* download_item) {
DownloadItemData* data = DownloadItemData::Get(download_item);
if (!data || !data->id()) {
return nullptr;
}
return data->web_contents();
}
// static
RenderFrameHost* DownloadItemUtils::GetRenderFrameHost(
const download::DownloadItem* download_item) {
DownloadItemData* data = DownloadItemData::Get(download_item);
if (!data)
return nullptr;
return RenderFrameHost::FromID(data->id());
}
// static
WebContents* DownloadItemUtils::GetOriginalWebContents(
const download::DownloadItem* download_item) {
DownloadItemData* data = DownloadItemData::Get(download_item);
if (!data) {
return nullptr;
}
return data->web_contents();
}
// static
void DownloadItemUtils::AttachInfo(download::DownloadItem* download_item,
BrowserContext* browser_context,
WebContents* web_contents,
GlobalRenderFrameHostId id) {
DownloadItemData::Attach(download_item, browser_context, web_contents, id);
}
// static
void DownloadItemUtils::AttachInfoForTesting(
download::DownloadItem* download_item,
BrowserContext* browser_context,
WebContents* web_contents) {
DownloadItemUtils::AttachInfo(
download_item, browser_context, web_contents,
web_contents ? web_contents->GetPrimaryMainFrame()->GetGlobalId()
: GlobalRenderFrameHostId());
}
} // namespace content
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