List printers managed by extensions in print preview

chrome/browser/ui/webui/print_preview/print_preview_handler.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
@@ skipping 106 matching lines @@
   static bool PrivetPrintingEnabled();
 
   content::WebContents* preview_web_contents() const;
 
   // Gets the list of printers. |args| is unused.
   void HandleGetPrinters(const base::ListValue* args);
 
   // Starts getting all local privet printers. |arg| is unused.
   void HandleGetPrivetPrinters(const base::ListValue* args);
 
+  // Starts getting all local extension managed printers. |arg| is unused.
+  void HandleGetExtensionPrinters(const base::ListValue* args);
+
   // Stops getting all local privet printers. |arg| is unused.
   void HandleStopGetPrivetPrinters(const base::ListValue* args);
 
   // Asks the initiator renderer to generate a preview.  First element of |args|
   // is a job settings JSON string.
   void HandleGetPreview(const base::ListValue* args);
 
   // Gets the job settings from Web UI and initiate printing. First element of
   // |args| is a job settings JSON string.
   void HandlePrint(const base::ListValue* args);
@@ skipping 52 matching lines @@
   // URL to set the new tab to.
   //
   // NOTE: This is needed to open FedEx confirmation window as a new tab.
   // Javascript's "window.open" opens a new window popup (since initiated from
   // async HTTP request) and worse yet, on Windows and Chrome OS, the opened
   // window opens behind the initiator window.
   void HandleForceOpenNewTab(const base::ListValue* args);
 
   void HandleGetPrivetPrinterCapabilities(const base::ListValue* arg);
 
+  // Requests an extension managed printer's capabilities.
+  // |arg| contains the ID of the extension from which the capabilities are
+  // requested and the ID of the printer whose capabilities are requested.
+  void HandleGetExtensionPrinterCapabilities(const base::ListValue* args);
+
   void SendInitialSettings(const std::string& default_printer);
 
   // Send OAuth2 access token.
   void SendAccessToken(const std::string& type,
                        const std::string& access_token);
 
   // Sends the printer capabilities to the Web UI. |settings_info| contains
   // printer capabilities information.
   void SendPrinterCapabilities(const base::DictionaryValue* settings_info);
 
@@ skipping 66 matching lines @@
       const std::string& name,
       const local_discovery::PrivetHTTPAsynchronousFactory::ResultCallback&
           callback);
   void FillPrinterDescription(
       const std::string& name,
       const local_discovery::DeviceDescription& description,
       bool has_local_printing,
       base::DictionaryValue* printer_value);
 #endif
 
+  // Called when a list of printers is reported by an extension.
+  // |printers|: The list of printers managed by the extension.
+  // |done|: Whether all the extensions have reported the list of printers
+  //     they manage.
+  void OnGotPrintersForExtension(const base::ListValue& printers, bool done);
+
+  // Called when an extension reports the set of print capabilites for a
+  // printer.
+  // |extension_id|: The extension that manages the printer.
+  // |printer_id|: The id of the pritner whose capabilities are reported.
+  // |capabilities|: The printer capabilities.
+  void OnGotExtensionPrinterCapabilities(
+      const std::string& extension_id,

[Vitaly Buka (NO REVIEWS), 2015/02/03 16:55:48]

why do we need to have separate extension id and printer id here.
Can we just combine them on native layer and just have single string here?

+      const std::string& printer_id,
+      const base::DictionaryValue& capabilities);
+
   // Register/unregister from notifications of changes done to the GAIA
   // cookie.
   void RegisterForMergeSession();
   void UnregisterForMergeSession();
 
   // The underlying dialog object.
   scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
 
   // A count of how many requests received to regenerate preview data.
   // Initialized to 0 then incremented and emitted to a histogram.
@@ skipping 38 matching lines @@
   // Notifies tests that want to know if the PDF has been saved. This doesn't
   // notify the test if it was a successful save, only that it was attempted.
   base::Closure pdf_file_saved_closure_;
 
   base::WeakPtrFactory<PrintPreviewHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_HANDLER_H_