Preliminary work on resuming downloads whose connections have expired.

chrome/browser/views/download_item_view.cc

Index: chrome/browser/views/download_item_view.cc
diff --git a/chrome/browser/views/download_item_view.cc b/chrome/browser/views/download_item_view.cc
index c2f2442a91a983ece10ec64e7260188c5d9ee681..29cb6e7c01396f723087875f200db0cf1e64d67e 100644
--- a/chrome/browser/views/download_item_view.cc
+++ b/chrome/browser/views/download_item_view.cc
@@ -62,6 +62,9 @@ static const SkColor kFileNameDisabledColor = SkColorSetRGB(171, 192, 212);
 // How long the 'download complete' animation should last for.
 static const int kCompleteAnimationDurationMs = 2500;
 
+// How long the 'download interrupted' animation should last for.
+static const int kInterruptedAnimationDurationMs = 2500;
+
 // How long we keep the item disabled after the user clicked it to open the
 // downloaded item.
 static const int kDisabledOnOpenDuration = 3000;
@@ -352,6 +355,17 @@ void DownloadItemView::OnDownloadUpdated(DownloadItem* download) {
     case DownloadItem::IN_PROGRESS:
       download_->is_paused() ? StopDownloadProgress() : StartDownloadProgress();
       break;
+    case DownloadItem::INTERRUPTED:
+      StopDownloadProgress();
+      interrupted_animation_.reset(new SlideAnimation(this));
+      interrupted_animation_->SetSlideDuration(kInterruptedAnimationDurationMs);
+      interrupted_animation_->SetTweenType(Tween::LINEAR);
+      interrupted_animation_->Show();
+      if (status_text.empty())
+        show_status_text_ = false;
+      SchedulePaint();
+      LoadIcon();
+      break;
     case DownloadItem::COMPLETE:
       if (download_->auto_opened()) {
         parent_->RemoveDownloadView(this);  // This will delete us!
@@ -426,7 +440,7 @@ void DownloadItemView::ButtonPressed(
   if (sender == discard_button_) {
     UMA_HISTOGRAM_LONG_TIMES("clickjacking.discard_download",
                              base::Time::Now() - creation_time_);
-    if (download_->state() == DownloadItem::IN_PROGRESS)
+    if (download_->IsPartialDownload())
       download_->Cancel(true);
     download_->Remove(true);
     // WARNING: we are deleted at this point.  Don't access 'this'.
@@ -653,6 +667,12 @@ void DownloadItemView::Paint(gfx::Canvas* canvas) {
         download_util::PaintDownloadComplete(canvas, this, 0, 0,
             complete_animation_->GetCurrentValue(),
             download_util::SMALL);
+      } else if ((download_->state() == DownloadItem::INTERRUPTED) &&
+                 interrupted_animation_.get() &&
+                 interrupted_animation_->is_animating()) {
+        download_util::PaintDownloadInterrupted(canvas, this, 0, 0,
+            interrupted_animation_->GetCurrentValue(),
+            download_util::SMALL);
       }
     }
 
@@ -780,6 +800,10 @@ bool DownloadItemView::OnMousePressed(const views::MouseEvent& event) {
   if (complete_animation_.get() && complete_animation_->is_animating())
     complete_animation_->End();
 
+  // Stop any 'interrupted' animation.
+  if (interrupted_animation_.get() && interrupted_animation_->is_animating())
+    interrupted_animation_->End();
+
   if (event.IsOnlyLeftMouseButton()) {
     gfx::Point point(event.location());
     if (!InDropDownButtonXCoordinateRange(event.x())) {