Mountain Lion: use the system download progress.

chrome/browser/download/download_status_updater_win.cc

+// 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 "chrome/browser/download/download_status_updater.h"
+
+#include <string>
+#include <shobjidl.h>
+
+#include "base/logging.h"
+#include "base/stl_util.h"
+#include "base/string_number_conversions.h"
+#include "base/win/metro.h"
+#include "base/win/scoped_comptr.h"
+#include "base/win/windows_version.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "googleurl/src/gurl.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+// This code doesn't compile with Aura on. TODO(avi): hook it up so that
+// win_aura can do platform integration.
+#if !defined(USE_AURA)
+
+namespace {
+
+const char kDownloadNotificationPrefix[] = "DownloadNotification";
+int g_next_notification_id = 0;
+
+void UpdateTaskbarProgressBar(int download_count,
+                              bool progress_known,
+                              float progress) {
+  // Taskbar progress bar is only supported on Win7.
+  if (base::win::GetVersion() < base::win::VERSION_WIN7)
+    return;
+
+  base::win::ScopedComPtr<ITaskbarList3> taskbar;
+  HRESULT result = taskbar.CreateInstance(CLSID_TaskbarList, NULL,
+                                          CLSCTX_INPROC_SERVER);
+  if (FAILED(result)) {
+    VLOG(1) << "Failed creating a TaskbarList object: " << result;
+    return;
+  }
+
+  result = taskbar->HrInit();
+  if (FAILED(result)) {
+    LOG(ERROR) << "Failed initializing an ITaskbarList3 interface.";
+    return;
+  }
+
+  // Iterate through all the browser windows, and draw the progress bar.
+  for (BrowserList::const_iterator browser_iterator = BrowserList::begin();
+      browser_iterator != BrowserList::end(); browser_iterator++) {
+    Browser* browser = *browser_iterator;
+    BrowserWindow* window = browser->window();
+    if (!window)
+      continue;
+    HWND frame = window->GetNativeWindow();
+    if (download_count == 0 || progress == 1.0f)
+      taskbar->SetProgressState(frame, TBPF_NOPROGRESS);
+    else if (!progress_known)
+      taskbar->SetProgressState(frame, TBPF_INDETERMINATE);
+    else
+      taskbar->SetProgressValue(frame, static_cast<int>(progress * 100), 100);
+  }
+}
+
+}  // namespace
+
+void DownloadStatusUpdater::UpdateAppIconDownloadProgress(
+    content::DownloadItem* download) {
+
+  // Always update overall progress.
+
+  float progress = 0;
+  int download_count = 0;
+  bool progress_known = GetProgress(&progress, &download_count);
+  UpdateTaskbarProgressBar(download_count, progress_known, progress);
+
+  // Fire notifications when downloads complete.
+
+  if (!base::win::IsMetroProcess())
+    return;
+
+  if (download->GetState() != content::DownloadItem::COMPLETE)
+    return;
+
+  if (download->GetOpenWhenComplete() ||
+      download->ShouldOpenFileBasedOnExtension() ||
+      download->IsTemporary() ||
+      download->GetAutoOpened())
+    return;
+
+  // In Windows 8 metro mode display a metro style notification which
+  // informs the user that the download is complete.
+  HMODULE metro = base::win::GetMetroModule();
+  base::win::MetroNotification display_notification =
+      reinterpret_cast<base::win::MetroNotification>(
+          ::GetProcAddress(metro, "DisplayNotification"));
+  DCHECK(display_notification);
+  if (display_notification) {
+    string16 title = l10n_util::GetStringUTF16(
+        IDS_METRO_DOWNLOAD_COMPLETE_NOTIFICATION_TITLE);
+    string16 body = l10n_util::GetStringUTF16(
+        IDS_METRO_DOWNLOAD_COMPLETE_NOTIFICATION);
+
+    // Dummy notification id. Every metro style notification needs a
+    // unique notification id.
+    std::string notification_id = kDownloadNotificationPrefix;
+    notification_id += base::IntToString(g_next_notification_id++);
+
+    display_notification(download->GetURL().spec().c_str(),
+                         "",
+                         title.c_str(),
+                         body.c_str(),
+                         L"",
+                         notification_id.c_str());
+  }
+}
+
+#endif  // !USE_AURA