1 files changed, 131 insertions, 0 deletions
diff --git a/chrome/browser/views/download_started_animation.cc b/chrome/browser/views/download_started_animation.cc
new file mode 100644
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+++ b/chrome/browser/views/download_started_animation.cc
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "chrome/browser/views/download_started_animation.h"
+
+#include "chrome/app/theme/theme_resources.h"
+#include "chrome/browser/tab_contents.h"
+#include "chrome/common/resource_bundle.h"
+#include "chrome/views/hwnd_view_container.h"
+
+// How long to spend moving downwards and fading out after waiting.
+static const int kMoveTimeMs = 600;
+
+// The animation framerate.
+static const int kFrameRateHz = 60;
+
+// What fraction of the frame height to move downward from the frame center.
+// Note that setting this greater than 0.5 will mean moving past the bottom of
+// the frame.
+static const double kMoveFraction = 1.0 / 3.0;
+
+DownloadStartedAnimation::DownloadStartedAnimation(TabContents* tab_contents)
+    : Animation(kMoveTimeMs, kFrameRateHz, NULL),
+      popup_(NULL),
+      tab_contents_(tab_contents) {
+  static SkBitmap* kDownloadImage = NULL;
+  if (!kDownloadImage) {
+    kDownloadImage = ResourceBundle::GetSharedInstance().GetBitmapNamed(
+        IDR_DOWNLOAD_ANIMATION_BEGIN);
+  }
+
+  // If we're too small to show the download image, then don't bother -
+  // the shelf will be enough.
+  tab_contents_->GetContainerBounds(&tab_contents_bounds_);
+  if (tab_contents_bounds_.height() < kDownloadImage->height())
+    return;
+
+  NotificationService::current()->AddObserver(this, NOTIFY_TAB_CONTENTS_HIDDEN,
+      Source<TabContents>(tab_contents_));
+  NotificationService::current()->AddObserver(this,
+      NOTIFY_TAB_CONTENTS_DESTROYED, Source<TabContents>(tab_contents_));
+
+  SetImage(kDownloadImage);
+
+  gfx::Rect rc(0, 0, 0, 0);
+  popup_ = new ChromeViews::HWNDViewContainer;
+  popup_->set_window_style(WS_POPUP);
+  popup_->set_window_ex_style(WS_EX_LAYERED | WS_EX_TOOLWINDOW |
+                              WS_EX_TRANSPARENT);
+  popup_->SetLayeredAlpha(0x00);
+  popup_->Init(tab_contents_->GetContainerHWND(), rc, this, false);
+  Reposition();
+  popup_->ShowWindow(SW_SHOWNOACTIVATE);
+
+  Start();
+}
+
+void DownloadStartedAnimation::Reposition() {
+  if (!tab_contents_)
+    return;
+
+  // Align the image with the bottom left of the web contents (so that it
+  // points to the newly created download).
+  CSize size;
+  GetPreferredSize(&size);
+  popup_->MoveWindow(tab_contents_bounds_.x(),
+                     static_cast<int>(tab_contents_bounds_.bottom() - size.cy -
+                     size.cy * (1 - GetCurrentValue())),
+                     size.cx, size.cy);
+}
+
+void DownloadStartedAnimation::Close() {
+  if (!tab_contents_)
+    return;
+
+  NotificationService::current()->RemoveObserver(this,
+      NOTIFY_TAB_CONTENTS_HIDDEN, Source<TabContents>(tab_contents_));
+  NotificationService::current()->RemoveObserver(this,
+      NOTIFY_TAB_CONTENTS_DESTROYED, Source<TabContents>(tab_contents_));
+  tab_contents_ = NULL;
+  popup_->Close();
+}
+
+void DownloadStartedAnimation::AnimateToState(double state) {
+  if (state >= 1.0) {
+    Close();
+  } else {
+    Reposition();
+
+    // Start at zero, peak halfway and end at zero.
+    double opacity = std::min(1.0 - pow(GetCurrentValue() - 0.5, 2) * 4.0,
+                              static_cast<double>(1.0));
+
+    popup_->SetLayeredAlpha(
+        static_cast<BYTE>(opacity * 255.0));
+    SchedulePaint();  // Reposition() calls MoveWindow() which never picks up
+                      // alpha changes, so we need to force a paint.
+  }
+}
+
+void DownloadStartedAnimation::Observe(NotificationType type,
+                                       const NotificationSource& source,
+                                       const NotificationDetails& details) {
+  Close();
+}