File: download_shelf.cc

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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/download/download_shelf.h"

#include <optional>
#include <utility>

#include "base/functional/bind.h"
#include "base/location.h"
#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "chrome/browser/download/download_core_service.h"
#include "chrome/browser/download/download_core_service_factory.h"
#include "chrome/browser/download/download_item_model.h"
#include "chrome/browser/download/offline_item_model.h"
#include "chrome/browser/download/offline_item_model_manager.h"
#include "chrome/browser/download/offline_item_model_manager_factory.h"
#include "chrome/browser/download/offline_item_utils.h"
#include "chrome/browser/offline_items_collection/offline_content_aggregator_factory.h"
#include "chrome/browser/platform_util.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_key.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/download/download_started_animation.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "components/download/public/common/download_item.h"
#include "components/offline_items_collection/core/offline_content_aggregator.h"
#include "components/offline_items_collection/core/offline_item.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/download_manager.h"
#include "content/public/browser/web_contents.h"
#include "ui/gfx/animation/animation.h"

DownloadShelf::DownloadShelf(Browser* browser, Profile* profile)
    : browser_(browser), profile_(profile) {}

DownloadShelf::~DownloadShelf() = default;

void DownloadShelf::AddDownload(DownloadUIModel::DownloadUIModelPtr model) {
  DCHECK(model);
  if (model->ShouldRemoveFromShelfWhenComplete()) {
    // If we are going to remove the download from the shelf upon completion,
    // wait a few seconds to see if it completes quickly. If it's a small
    // download, then the user won't have time to interact with it.
    base::SingleThreadTaskRunner::GetCurrentDefault()->PostDelayedTask(
        FROM_HERE,
        base::BindOnce(&DownloadShelf::ShowDownloadById,
                       weak_ptr_factory_.GetWeakPtr(), model->GetContentId()),
        GetTransientDownloadShowDelay());
  } else {
    ShowDownload(std::move(model));
  }
}

void DownloadShelf::Open() {
  if (is_hidden_)
    should_show_on_unhide_ = true;
  else
    DoOpen();
}

void DownloadShelf::Close() {
  if (is_hidden_)
    should_show_on_unhide_ = false;
  else
    DoClose();
}

void DownloadShelf::Hide() {
  if (is_hidden_)
    return;
  is_hidden_ = true;
  if (IsShowing()) {
    should_show_on_unhide_ = true;
    DoHide();
  }
}

void DownloadShelf::Unhide() {
  if (!is_hidden_)
    return;
  is_hidden_ = false;
  if (should_show_on_unhide_) {
    should_show_on_unhide_ = false;
    DoUnhide();
  }
}

base::TimeDelta DownloadShelf::GetTransientDownloadShowDelay() const {
  return base::Seconds(2);
}

void DownloadShelf::ShowDownload(DownloadUIModel::DownloadUIModelPtr download) {
  if (download->GetState() == download::DownloadItem::COMPLETE &&
      download->ShouldRemoveFromShelfWhenComplete())
    return;

  if (!DownloadCoreServiceFactory::GetForBrowserContext(download->profile())
           ->IsDownloadUiEnabled())
    return;

  Unhide();
  Open();

  const bool should_show_download_started_animation =
      download->ShouldShowDownloadStartedAnimation();
  DoShowDownload(std::move(download));

  // Show the download started animation if:
  // - Download started animation is enabled for this download. It is disabled
  //   for "Save As" downloads and extension installs, for example.
  // - Rich animations are enabled.
  // - The browser has an active visible WebContents. (browser isn't minimized,
  //   or running under a test etc.)
  if (!should_show_download_started_animation ||
      !gfx::Animation::ShouldRenderRichAnimation() || !browser_)
    return;
  content::WebContents* const shelf_tab =
      browser_->tab_strip_model()->GetActiveWebContents();
  if (shelf_tab && platform_util::IsVisible(shelf_tab->GetNativeView()))
    DownloadStartedAnimation::Show(shelf_tab);
}

void DownloadShelf::ShowDownloadById(
    const offline_items_collection::ContentId& id) {
  if (OfflineItemUtils::IsDownload(id)) {
    auto* const manager = profile()->GetDownloadManager();
    if (manager) {
      auto* const download = manager->GetDownloadByGuid(id.id);
      if (download)
        ShowDownload(DownloadItemModel::Wrap(download));
    }
  } else {
    auto* const aggregator =
        OfflineContentAggregatorFactory::GetForKey(profile()->GetProfileKey());
    if (aggregator) {
      aggregator->GetItemById(
          id, base::BindOnce(&DownloadShelf::OnGetDownloadDoneForOfflineItem,
                             weak_ptr_factory_.GetWeakPtr()));
    }
  }
}

void DownloadShelf::OnGetDownloadDoneForOfflineItem(
    const std::optional<offline_items_collection::OfflineItem>& item) {
  if (item.has_value()) {
    auto* const manager =
        OfflineItemModelManagerFactory::GetForBrowserContext(profile());
    ShowDownload(OfflineItemModel::Wrap(manager, item.value()));
  }
}