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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.
#include <stdint.h>
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "chrome/browser/download/download_ui_model.h"
class Browser;
namespace gfx {
class Canvas;
namespace ui {
class ThemeProvider;
using offline_items_collection::ContentId;
using offline_items_collection::OfflineItem;
using DownloadUIModelPtr = DownloadUIModel::DownloadUIModelPtr;
// This is an abstract base class for platform specific download shelf
// implementations.
class DownloadShelf {
// Reason for closing download shelf.
enum CloseReason {
// Closing the shelf automatically. E.g.: all remaining downloads in the
// shelf have been opened, last download in shelf was removed, or the
// browser is switching to full-screen mode.
// Closing shelf due to a user selection. E.g.: the user clicked on the
// 'close' button on the download shelf, or the shelf is being closed as a
// side-effect of the user opening the downloads page.
// Download progress animations ----------------------------------------------
enum {
// Progress animation timer period, in milliseconds.
kProgressRateMs = 30,
// Size of the space used for the progress indicator.
kProgressIndicatorSize = 25,
// x/y offset for the file type icon.
kFiletypeIconOffset = (kProgressIndicatorSize - 16) / 2
virtual ~DownloadShelf();
// Paint the common download animation progress foreground and background,
// clipping the foreground to 'percent' full. If percent is -1, then we don't
// know the total size, so we just draw a rotating segment until we're done.
// |progress_time| is only used for these unknown size downloads.
static void PaintDownloadProgress(gfx::Canvas* canvas,
const ui::ThemeProvider& theme_provider,
const base::TimeDelta& progress_time,
int percent);
static void PaintDownloadComplete(gfx::Canvas* canvas,
const ui::ThemeProvider& theme_provider,
double animation_progress);
static void PaintDownloadInterrupted(gfx::Canvas* canvas,
const ui::ThemeProvider& theme_provider,
double animation_progress);
// 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(DownloadUIModelPtr 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 Open();
// Closes the shelf.
void Close(CloseReason reason);
// 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_; }
virtual void DoAddDownload(DownloadUIModelPtr download) = 0;
virtual void DoOpen() = 0;
virtual void DoClose(CloseReason reason) = 0;
virtual void DoHide() = 0;
virtual void DoUnhide() = 0;
// Time delay to wait before adding a transient download to the shelf.
// Protected virtual for testing.
virtual base::TimeDelta GetTransientDownloadShowDelay();
// Virtual for testing.
virtual Profile* profile() const;
// Show the download on the shelf immediately. Also displayes the download
// started animation if necessary.
void ShowDownload(DownloadUIModelPtr download);
// Similar to ShowDownload() but refers to the download using an ID.
void ShowDownloadById(ContentId id);
bool should_show_on_unhide_;
bool is_hidden_;
base::WeakPtrFactory<DownloadShelf> weak_ptr_factory_;