[win] implemented APIs for set/get App User Model ID

AUMID ([AppUserModelID](https://msdn.microsoft.com/en-us/library/windows/desktop/dd378459(v=vs.85).aspx))
is useful to group windows on task bars for multi-process applications
on Windows 7 or later. With the newly added APIs, developers can
get and explicitly set AUMID for each window. Or set a default
AUMID for all windows opened.

Author: Cong Liu

src/api/nw_app.idl

@@ -26,6 +26,8 @@ namespace nw.App {
     static DOMString[] getArgvSync();
     static DOMString getDataPath();
     static void crashBrowser();
+    static DOMString getDefaultAppUserModelID();
+    static void setDefaultAppUserModelID(DOMString app_id);
   };
   interface Events {
     static void onOpen(DOMString cmdline);

src/api/nw_app_api.cc

@@ -2,12 +2,16 @@
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browsing_data/browsing_data_appcache_helper.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
 #include "chrome/browser/browsing_data/browsing_data_remover_factory.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/extensions/devtools_util.h"
 #include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/web_applications/web_app.h"
+#include "content/nw/src/common/shell_switches.h"
 #include "content/nw/src/nw_base.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
@@ -24,6 +28,10 @@
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
 
+#if defined(OS_WIN)
+#include "chrome/browser/shell_integration_win.h"
+#endif
+
 namespace {
 void SetProxyConfigCallback(
     base::WaitableEvent* done,
@@ -182,5 +190,35 @@ bool NwAppCrashBrowserFunction::RunAsync() {
   return true;
 }
 
+bool NwAppGetDefaultAppUserModelIDFunction::RunNWSync(base::ListValue* response, std::string* error) {
+#if defined(OS_WIN)
+  base::string16 app_id;
+  nw::Package* package = nw::package();
+  if (package->root()->GetString(::switches::kmAppUserModelID, &app_id)) {
+    response->AppendString(app_id);
+  } else {
+    std::string app_name =
+        web_app::GenerateApplicationNameFromExtensionId(extension_id());
+    base::string16 app_name_wide = base::UTF8ToWide(app_name);
+    Profile* profile =
+        Profile::FromBrowserContext(browser_context());
+    app_id = shell_integration::win::GetAppModelIdForProfile(
+        app_name_wide, profile->GetPath());
+    response->AppendString(app_id);
+  }
+#endif
+  return true;
+}
+
+bool NwAppSetDefaultAppUserModelIDFunction::RunNWSync(base::ListValue* response, std::string* error) {
+#if defined(OS_WIN)
+  std::string app_id;
+  EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &app_id));
+
+  nw::Package* package = nw::package();
+  package->root()->SetString(::switches::kmAppUserModelID, app_id);
+#endif
+  return true;
+}
 
 } // namespace extensions

src/api/nw_app_api.h

@@ -117,5 +117,31 @@ class NwAppCrashBrowserFunction : public AsyncExtensionFunction {
   DECLARE_EXTENSION_FUNCTION("nw.App.crashBrowser", UNKNOWN)
 };
 
+class NwAppGetDefaultAppUserModelIDFunction : public NWSyncExtensionFunction {
+ public:
+  NwAppGetDefaultAppUserModelIDFunction(){}
+  bool RunNWSync(base::ListValue* response, std::string* error) override;
+    
+ protected:
+  ~NwAppGetDefaultAppUserModelIDFunction() override {}
+    
+  DECLARE_EXTENSION_FUNCTION("nw.App.getDefaultAppUserModelID", UNKNOWN)
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NwAppGetDefaultAppUserModelIDFunction);
+};
+
+class NwAppSetDefaultAppUserModelIDFunction : public NWSyncExtensionFunction {
+ public:
+  NwAppSetDefaultAppUserModelIDFunction(){}
+  bool RunNWSync(base::ListValue* response, std::string* error) override;
+    
+ protected:
+  ~NwAppSetDefaultAppUserModelIDFunction() override {}
+    
+  DECLARE_EXTENSION_FUNCTION("nw.App.setDefaultAppUserModelID", UNKNOWN)
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NwAppSetDefaultAppUserModelIDFunction);
+};
+
 } // namespace extensions
 #endif

src/api/nw_current_window_internal.idl

@@ -44,5 +44,7 @@ namespace nw.currentWindowInternal {
     static object getWinParamInternal();
     static void getPrinters(GetPrintersCallback callback);
     static void setPrintSettingsInternal(optional object options);
+    static DOMString getAppUserModelID();
+    static void setAppUserModelID(DOMString id);
   };
 };

src/api/nw_window.idl

@@ -39,6 +39,7 @@ namespace nw.Window {
     [nodoc] DOMString? icon;
     [nodoc] DOMString? inject_js_start;
     [nodoc] DOMString? inject_js_end;
+    [nodoc] DOMString? app_user_model_id;
   };
 
   [noinline_doc] dictionary NWWindow {
@@ -72,6 +73,8 @@ namespace nw.Window {
     static void removeAllListeners(DOMString event);
     static void reload();
     static void reloadIgnoringCache();
+    static DOMString getAppUserModelID();
+    static void setAppUserModelID(DOMString id);
 
     static void eval(object frame, DOMString script);
     static void evalNWBin(object frame, DOMString path);

src/api/nw_window_api.cc

@@ -38,6 +38,7 @@
 #include "ui/gfx/platform_font.h"
 #include "ui/display/win/dpi.h"
 #include "ui/views/win/hwnd_util.h"
+#include "chrome/browser/ui/views/apps/chrome_native_app_window_views_win.h"
 #endif
 
 #if defined(OS_LINUX)
@@ -746,5 +747,46 @@ bool NwCurrentWindowInternalSetShowInTaskbarFunction::RunAsync() {
   return true;
 }
 
+bool NwCurrentWindowInternalGetAppUserModelIDFunction::RunNWSync(base::ListValue* response, std::string* error) {
+#if defined(OS_WIN)
+  AppWindow* app_window = getAppWindow(this);
+
+  if (!app_window) {
+    *error = "cannot get current window; are you in background page/node context?";
+    return false;
+  }
+  
+  ChromeNativeAppWindowViewsWin* native_app_window = static_cast<ChromeNativeAppWindowViewsWin*>(app_window->GetBaseWindow());
+  response->AppendString(native_app_window->app_model_id());
+#endif
+  return true;
+}
+
+bool NwCurrentWindowInternalSetAppUserModelIDFunction::RunNWSync(base::ListValue* response, std::string* error) {
+#if defined(OS_WIN)
+  EXTENSION_FUNCTION_VALIDATE(args_);
+
+  if (!args_->GetSize())
+    return false;
+  base::string16 app_id;
+  if (!args_->GetString(0, &app_id))
+    return false;
+  if (app_id.empty())
+    *error = "AppUserModelID cannot set to empty string";
+    return false;
+
+  AppWindow* app_window = getAppWindow(this);
+
+  if (!app_window) {
+    *error = "cannot get current window; are you in background page/node context?";
+    return false;
+  }
+
+  ChromeNativeAppWindowViewsWin* native_app_window = static_cast<ChromeNativeAppWindowViewsWin*>(app_window->GetBaseWindow());
+  native_app_window->SetAppModelId(app_id);
+#endif
+  return true;
+}
+
 } // namespace extensions
 

src/api/nw_window_api.h

@@ -300,5 +300,25 @@ class NwCurrentWindowInternalSetPrintSettingsInternalFunction : public NWSyncExt
    ~NwCurrentWindowInternalSetPrintSettingsInternalFunction() override {}
    DECLARE_EXTENSION_FUNCTION("nw.currentWindowInternal.setPrintSettingsInternal", UNKNOWN)
 };
+
+class NwCurrentWindowInternalGetAppUserModelIDFunction : public NWSyncExtensionFunction {
+ public:
+   NwCurrentWindowInternalGetAppUserModelIDFunction() {}
+   bool RunNWSync(base::ListValue* response, std::string* error) override;
+
+ protected:
+   ~NwCurrentWindowInternalGetAppUserModelIDFunction() override {}
+   DECLARE_EXTENSION_FUNCTION("nw.currentWindowInternal.getAppUserModelID", UNKNOWN)
+};
+
+class NwCurrentWindowInternalSetAppUserModelIDFunction : public NWSyncExtensionFunction {
+ public:
+   NwCurrentWindowInternalSetAppUserModelIDFunction() {}
+   bool RunNWSync(base::ListValue* response, std::string* error) override;
+
+ protected:
+   ~NwCurrentWindowInternalSetAppUserModelIDFunction() override {}
+   DECLARE_EXTENSION_FUNCTION("nw.currentWindowInternal.setAppUserModelID", UNKNOWN)
+};
 } // namespace extensions
 #endif

src/common/shell_switches.cc

@@ -112,6 +112,7 @@ const char kmNewInstance[] = "new-instance";
 const char kmInjectJSDocStart[]  = "inject_js_start";
 const char kmInjectJSDocEnd[]  = "inject_js_end";
 const char kmInjectCSS[] = "inject-css";
+const char kmAppUserModelID[] = "app_user_model_id";
 
 #if defined(OS_WIN)
 // Enable conversion from vector to raster for any page.

src/common/shell_switches.h

@@ -35,6 +35,7 @@ extern NW_EXPORT const char kmWebkit[];
 extern NW_EXPORT const char kmWindow[];
 extern NW_EXPORT const char kmChromiumArgs[];
 extern NW_EXPORT const char kmJsFlags[];
+extern NW_EXPORT const char kmAppUserModelID[];
 
 extern NW_EXPORT const char kmSingleInstance[];
 

src/resources/api_nw_app.js

@@ -71,6 +71,12 @@ nw_binding.registerCustomHook(function(bindingsAPI) {
   apiFunctions.setHandleRequest('removeOriginAccessWhitelistEntry', function() {
     nwNatives.removeOriginAccessWhitelistEntry.apply(this, arguments);
   });
+  apiFunctions.setHandleRequest('getDefaultAppUserModelID', function() {
+    return sendRequest.sendRequestSync('nw.App.getDefaultAppUserModelID', arguments, this.definition.parameters, {})[0];
+  });
+  apiFunctions.setHandleRequest('setDefaultAppUserModelID', function() {
+    sendRequest.sendRequestSync('nw.App.setDefaultAppUserModelID', arguments, this.definition.parameters, {});
+  });
   apiFunctions.setHandleRequest('once', function(event, listener) { //FIXME: unify with nw.Window
     if (typeof listener !== 'function')
       throw new TypeError('listener must be a function');
@@ -119,7 +125,6 @@ nw_binding.registerCustomHook(function(bindingsAPI) {
   bindingsAPI.compiledApi.unregisterGlobalHotKey = function() {
     return nw.Shortcut.unregisterGlobalHotKey.apply(nw.Shortcut, arguments);
   };
-
 });
 
 exports.binding = nw_binding.generate();