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The Browser object represents the top-level Chrome browser window. One or more tabs (WebContents) are then owned by the Browser object via TabStripModel. A new Browser object can be created programmatically using "new Browser" or Browser::Create, or as a result of user action such as dragging a tab out of an existing window. New or existing tabs can also be added to an already existing Browser object. The Browser object acts as the WebContentsDelegate for all attached tabs. CEF integration requires WebContentsDelegate callbacks and notification of tab attach/detach. To support this integration we add a cef::BrowserDelegate (ChromeBrowserDelegate) member that is created in the Browser constructor and receives delegation for the Browser callbacks. ChromeBrowserDelegate creates a new ChromeBrowserHostImpl when a tab is added to a Browser for the first time, and that ChromeBrowserHostImpl continues to exist until the tab's WebContents is destroyed. The associated WebContents object does not change, but the Browser object will change when the tab is dragged between windows. CEF callback logic is shared between the chrome and alloy runtimes where possible. This shared logic has been extracted from CefBrowserHostImpl to create new CefBrowserHostBase and CefBrowserContentsDelegate classes. The CefBrowserHostImpl class is now only used with the alloy runtime and will be renamed to AlloyBrowserHostImpl in a future commit.
65 lines
2.5 KiB
C++
65 lines
2.5 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CEF_LIBCEF_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
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#define CEF_LIBCEF_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
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#pragma once
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#include <set>
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#include "libcef/browser/browser_host_base.h"
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#include "base/compiler_specific.h"
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#include "base/memory/weak_ptr.h"
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#include "components/download/public/common/download_item.h"
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#include "content/public/browser/download_manager.h"
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#include "content/public/browser/download_manager_delegate.h"
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class CefBrowserHostImpl;
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class CefDownloadManagerDelegate : public download::DownloadItem::Observer,
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public content::DownloadManager::Observer,
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public content::DownloadManagerDelegate,
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public CefBrowserHostBase::Observer {
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public:
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explicit CefDownloadManagerDelegate(content::DownloadManager* manager);
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~CefDownloadManagerDelegate() override;
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private:
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// DownloadItem::Observer methods.
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void OnDownloadUpdated(download::DownloadItem* item) override;
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void OnDownloadDestroyed(download::DownloadItem* item) override;
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// DownloadManager::Observer methods.
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void OnDownloadCreated(content::DownloadManager* manager,
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download::DownloadItem* item) override;
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void ManagerGoingDown(content::DownloadManager* manager) override;
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// DownloadManagerDelegate methods.
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bool DetermineDownloadTarget(
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download::DownloadItem* item,
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content::DownloadTargetCallback* callback) override;
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void GetNextId(content::DownloadIdCallback callback) override;
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std::string ApplicationClientIdForFileScanning() override;
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// CefBrowserHostBase::Observer methods.
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void OnBrowserDestroyed(CefBrowserHostBase* browser) override;
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CefBrowserHostImpl* GetOrAssociateBrowser(download::DownloadItem* item);
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CefBrowserHostImpl* GetBrowser(download::DownloadItem* item);
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content::DownloadManager* manager_;
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base::WeakPtrFactory<content::DownloadManager> manager_ptr_factory_;
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// Map of DownloadItem to originating CefBrowserHostImpl. Maintaining this
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// map is necessary because DownloadItem::GetWebContents() may return NULL if
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// the browser navigates while the download is in progress.
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typedef std::map<download::DownloadItem*, CefBrowserHostImpl*> ItemBrowserMap;
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ItemBrowserMap item_browser_map_;
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DISALLOW_COPY_AND_ASSIGN(CefDownloadManagerDelegate);
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};
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#endif // CEF_LIBCEF_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
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