win: Implement SetProgressBar API.

atom/browser/api/atom_api_window.cc

@@ -366,6 +366,10 @@ void Window::Print(mate::Arguments* args) {
   window_->Print(settings.silent, settings.print_backgournd);
 }
 
+void Window::SetProgressBar(double progress) {
+  window_->SetProgressBar(progress);
+}
+
 mate::Handle<WebContents> Window::GetWebContents(v8::Isolate* isolate) const {
   return WebContents::Create(isolate, window_->GetWebContents());
 }
@@ -428,6 +432,7 @@ void Window::BuildPrototype(v8::Isolate* isolate,
       .SetMethod("isWebViewFocused", &Window::IsWebViewFocused)
       .SetMethod("capturePage", &Window::CapturePage)
       .SetMethod("print", &Window::Print)
+      .SetMethod("setProgressBar", &Window::SetProgressBar)
       .SetMethod("_getWebContents", &Window::GetWebContents)
       .SetMethod("_getDevToolsWebContents", &Window::GetDevToolsWebContents);
 }

atom/browser/api/atom_api_window.h

@@ -103,6 +103,7 @@ class Window : public mate::EventEmitter,
   bool IsDocumentEdited();
   void CapturePage(mate::Arguments* args);
   void Print(mate::Arguments* args);
+  void SetProgressBar(double progress);
 
   // APIs for WebContents.
   mate::Handle<WebContents> GetWebContents(v8::Isolate* isolate) const;

atom/browser/native_window.h

@@ -140,6 +140,7 @@ class NativeWindow : public brightray::DefaultWebContentsDelegate,
   virtual void SetMenu(ui::MenuModel* menu);
   virtual bool HasModalDialog();
   virtual gfx::NativeWindow GetNativeWindow() = 0;
+  virtual void SetProgressBar(double progress) = 0;
 
   virtual bool IsClosed() const { return is_closed_; }
   virtual void OpenDevTools();

atom/browser/native_window_views.cc

@@ -43,7 +43,9 @@
 #elif defined(OS_WIN)
 #include "atom/browser/ui/views/win_frame_view.h"
 #include "base/win/scoped_comptr.h"
+#include "base/win/windows_version.h"
 #include "ui/base/win/shell.h"
+#include "ui/views/win/hwnd_util.h"
 #endif
 
 namespace atom {
@@ -479,6 +481,27 @@ gfx::NativeWindow NativeWindowViews::GetNativeWindow() {
   return window_->GetNativeWindow();
 }
 
+void NativeWindowViews::SetProgressBar(double progress) {
+#if defined(OS_WIN)
+  if (base::win::GetVersion() < base::win::VERSION_WIN7)
+    return;
+  base::win::ScopedComPtr<ITaskbarList3> taskbar;
+  if (FAILED(taskbar.CreateInstance(CLSID_TaskbarList, NULL,
+                                    CLSCTX_INPROC_SERVER) ||
+      FAILED(taskbar->HrInit()))) {
+    return;
+  }
+  HWND frame = views::HWNDForNativeWindow(GetNativeWindow());
+  if (progress > 1.0) {
+    taskbar->SetProgressState(frame, TBPF_INDETERMINATE);
+  } else if (progress < 0) {
+    taskbar->SetProgressState(frame, TBPF_NOPROGRESS);
+  } else if (progress >= 0) {
+    taskbar->SetProgressValue(frame, static_cast<int>(progress*100), progress);
+  }
+#endif
+}
+
 gfx::AcceleratedWidget NativeWindowViews::GetAcceleratedWidget() {
   return GetNativeWindow()->GetHost()->GetAcceleratedWidget();
 }

atom/browser/native_window_views.h

@@ -71,6 +71,7 @@ class NativeWindowViews : public NativeWindow,
   virtual bool IsKiosk() OVERRIDE;
   virtual void SetMenu(ui::MenuModel* menu_model) OVERRIDE;
   virtual gfx::NativeWindow GetNativeWindow() OVERRIDE;
+  virtual void SetProgressBar(double value) OVERRIDE;
 
   gfx::AcceleratedWidget GetAcceleratedWidget();