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// Copyright (c) 2012 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.
#ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SHELF_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SHELF_H_
#include "base/memory/weak_ptr.h"
#include "base/time.h"
namespace content {
class DownloadItem;
class DownloadManager;
}
class Browser;
// This is an abstract base class for platform specific download shelf
// implementations.
class DownloadShelf {
public:
DownloadShelf();
virtual ~DownloadShelf();
// A new download has started. Add it to our shelf and show the download
// started animation.
//
// Some downloads are removed from the shelf on completion (See
// DownloadItemModel::ShouldRemoveFromShelfWhenComplete()). These transient
// downloads are added to the shelf after a delay. If the download completes
// before the delay duration, it will not be added to the shelf at all.
void AddDownload(content::DownloadItem* download);
// The browser view needs to know when we are going away to properly return
// the resize corner size to WebKit so that we don't draw on top of it.
// This returns the showing state of our animation which is set to true at
// the beginning Show and false at the beginning of a Hide.
virtual bool IsShowing() const = 0;
// Returns whether the download shelf is showing the close animation.
virtual bool IsClosing() const = 0;
// Opens the shelf.
void Show();
// Closes the shelf.
void Close();
// Hides the shelf. This closes the shelf if it is currently showing.
void Hide();
// Unhides the shelf. This will cause the shelf to be opened if it was open
// when it was hidden, or was shown while it was hidden.
void Unhide();
virtual Browser* browser() const = 0;
// Returns whether the download shelf is hidden.
bool is_hidden() { return is_hidden_; }
protected:
virtual void DoAddDownload(content::DownloadItem* download) = 0;
virtual void DoShow() = 0;
virtual void DoClose() = 0;
// Time delay to wait before adding a transient download to the shelf.
// Protected virtual for testing.
virtual base::TimeDelta GetTransientDownloadShowDelay();
// Returns the DownloadManager associated with this DownloadShelf. All
// downloads that are shown on this shelf is expected to belong to this
// DownloadManager. Protected virtual for testing.
virtual content::DownloadManager* GetDownloadManager();
private:
// Show the download on the shelf immediately. Also displayes the download
// started animation if necessary.
void ShowDownload(content::DownloadItem* download);
// Similar to ShowDownload() but refers to the download using an ID. This
// download should belong to the DownloadManager returned by
// GetDownloadManager().
void ShowDownloadById(int32 download_id);
bool should_show_on_unhide_;
bool is_hidden_;
base::WeakPtrFactory<DownloadShelf> weak_ptr_factory_;
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SHELF_H_
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