From 86218fe7736b1b89516936faf04b3764fe8f0604 Mon Sep 17 00:00:00 2001
From: Kevin Sawicki <kevinsawicki@gmail.com>
Date: Thu, 14 Jul 2016 13:27:16 -0700
Subject: [PATCH] win: Add setThumbnailClip window API

---
 atom/browser/api/atom_api_window.cc |  7 +++++++
 atom/browser/api/atom_api_window.h  |  1 +
 atom/browser/ui/win/taskbar_host.cc | 16 ++++++++++++++++
 atom/browser/ui/win/taskbar_host.h  |  4 ++++
 4 files changed, 28 insertions(+)

diff --git a/atom/browser/api/atom_api_window.cc b/atom/browser/api/atom_api_window.cc
index afa04c31a46e..848294045428 100644
--- a/atom/browser/api/atom_api_window.cc
+++ b/atom/browser/api/atom_api_window.cc
@@ -649,6 +649,12 @@ bool Window::IsWindowMessageHooked(UINT message) {
 void Window::UnhookAllWindowMessages() {
   messages_callback_map_.clear();
 }
+
+bool Window::SetThumbnailClip(const gfx::Rect& region) {
+  auto window = static_cast<NativeWindowViews*>(window_.get());
+  return window->taskbar_host().SetThumbnailClip(
+      window_->GetAcceleratedWidget(), region);
+}
 #endif
 
 #if defined(TOOLKIT_VIEWS)
@@ -836,6 +842,7 @@ void Window::BuildPrototype(v8::Isolate* isolate,
       .SetMethod("isWindowMessageHooked", &Window::IsWindowMessageHooked)
       .SetMethod("unhookWindowMessage", &Window::UnhookWindowMessage)
       .SetMethod("unhookAllWindowMessages", &Window::UnhookAllWindowMessages)
+      .SetMethod("setThumbnailClip", &Window::SetThumbnailClip)
 #endif
 #if defined(TOOLKIT_VIEWS)
       .SetMethod("setIcon", &Window::SetIcon)
diff --git a/atom/browser/api/atom_api_window.h b/atom/browser/api/atom_api_window.h
index f4b481a5cef8..f681e1c036ff 100644
--- a/atom/browser/api/atom_api_window.h
+++ b/atom/browser/api/atom_api_window.h
@@ -179,6 +179,7 @@ class Window : public mate::TrackableObject<Window>,
   bool IsWindowMessageHooked(UINT message);
   void UnhookWindowMessage(UINT message);
   void UnhookAllWindowMessages();
+  bool SetThumbnailClip(const gfx::Rect& window_region);
 #endif
 
 #if defined(TOOLKIT_VIEWS)
diff --git a/atom/browser/ui/win/taskbar_host.cc b/atom/browser/ui/win/taskbar_host.cc
index 78bcc578c19f..8fef5e08a3fb 100644
--- a/atom/browser/ui/win/taskbar_host.cc
+++ b/atom/browser/ui/win/taskbar_host.cc
@@ -142,6 +142,22 @@ bool TaskbarHost::SetOverlayIcon(
       window, icon.get(), base::UTF8ToUTF16(text).c_str()));
 }
 
+bool TaskbarHost::SetThumbnailClip(HWND window, const gfx::Rect& region) {
+  if (!InitializeTaskbar())
+    return false;
+
+  if (region.IsEmpty()) {
+    return SUCCEEDED(taskbar_->SetThumbnailClip(window, NULL));
+  } else {
+    RECT rect;
+    rect.left = region.x();
+    rect.right = region.right();
+    rect.top = region.y();
+    rect.bottom = region.bottom();
+    return SUCCEEDED(taskbar_->SetThumbnailClip(window, &rect));
+  }
+}
+
 bool TaskbarHost::HandleThumbarButtonEvent(int button_id) {
   if (ContainsKey(callback_map_, button_id)) {
     auto callback = callback_map_[button_id];
diff --git a/atom/browser/ui/win/taskbar_host.h b/atom/browser/ui/win/taskbar_host.h
index 0cd5aa714fc2..c10e05f764dd 100644
--- a/atom/browser/ui/win/taskbar_host.h
+++ b/atom/browser/ui/win/taskbar_host.h
@@ -13,6 +13,7 @@
 
 #include "base/callback.h"
 #include "base/win/scoped_comptr.h"
+#include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/image/image.h"
 
 namespace atom {
@@ -40,6 +41,9 @@ class TaskbarHost {
   bool SetOverlayIcon(
       HWND window, const gfx::Image& overlay, const std::string& text);
 
+  // Set the region of the window to show as a thumbnail in taskbar.
+  bool TaskbarHost::SetThumbnailClip(HWND window, const gfx::Rect& region);
+
   // Called by the window that there is a button in thumbar clicked.
   bool HandleThumbarButtonEvent(int button_id);