List printers managed by extensions in print preview

chrome/browser/resources/print_preview/native_layer.js

 // 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.
 
 cr.exportPath('print_preview');
 
 /**
  * @typedef {{selectSaveAsPdfDestination: boolean,
  *            layoutSettings.portrait: boolean,
  *            pageRange: string,
@@ skipping 39 matching lines @@
     global.onDidGetPreviewPageCount =
         this.onDidGetPreviewPageCount_.bind(this);
     global.onDidPreviewPage = this.onDidPreviewPage_.bind(this);
     global.updatePrintPreview = this.onUpdatePrintPreview_.bind(this);
     global.onDidGetAccessToken = this.onDidGetAccessToken_.bind(this);
     global.autoCancelForTesting = this.autoCancelForTesting_.bind(this);
     global.onPrivetPrinterChanged = this.onPrivetPrinterChanged_.bind(this);
     global.onPrivetCapabilitiesSet =
         this.onPrivetCapabilitiesSet_.bind(this);
     global.onPrivetPrintFailed = this.onPrivetPrintFailed_.bind(this);
+    global.onExtensionPrintersAdded =
+        this.onExtensionPrintersAdded_.bind(this);
+    global.onExtensionCapabilitiesSet =
+        this.onExtensionCapabilitiesSet_.bind(this);
     global.onEnableManipulateSettingsForTest =
         this.onEnableManipulateSettingsForTest_.bind(this);
     global.printPresetOptionsFromDocument =
         this.onPrintPresetOptionsFromDocument_.bind(this);
   };
 
   /**
    * Event types dispatched from the Chromium native layer.
    * @enum {string}
    * @const
@@ skipping 18 matching lines @@
     PREVIEW_GENERATION_DONE:
         'print_preview.NativeLayer.PREVIEW_GENERATION_DONE',
     PREVIEW_GENERATION_FAIL:
         'print_preview.NativeLayer.PREVIEW_GENERATION_FAIL',
     PRINT_TO_CLOUD: 'print_preview.NativeLayer.PRINT_TO_CLOUD',
     SETTINGS_INVALID: 'print_preview.NativeLayer.SETTINGS_INVALID',
     PRIVET_PRINTER_CHANGED: 'print_preview.NativeLayer.PRIVET_PRINTER_CHANGED',
     PRIVET_CAPABILITIES_SET:
         'print_preview.NativeLayer.PRIVET_CAPABILITIES_SET',
     PRIVET_PRINT_FAILED: 'print_preview.NativeLayer.PRIVET_PRINT_FAILED',
+    EXTENSION_PRINTERS_ADDED:
+        'print_preview.NativeLayer.EXTENSION_PRINTERS_ADDED',
+    EXTENSION_CAPABILITIES_SET:
+        'print_preview.NativeLayer.EXTENSION_CAPABILITIES_SET',
     PRINT_PRESET_OPTIONS: 'print_preview.NativeLayer.PRINT_PRESET_OPTIONS',
   };
 
   /**
    * Constant values matching printing::DuplexMode enum.
    * @enum {number}
    */
   NativeLayer.DuplexMode = {
     SIMPLEX: 0,
     LONG_EDGE: 1,
@@ skipping 62 matching lines @@
     /**
      * Requests the privet destination's printing capabilities. A
      * PRIVET_CAPABILITIES_SET event will be dispatched in response.
      * @param {string} destinationId ID of the destination.
      */
     startGetPrivetDestinationCapabilities: function(destinationId) {
       chrome.send('getPrivetPrinterCapabilities', [destinationId]);
     },
 
     /**
+     * Requests that extension system dispatches an event requesting the list of
+     * extension managed printers.
+     */
+    startGetExtensionDestinations: function() {
+      chrome.send('getExtensionPrinters');
+    },
+
+    /**
+     * Requests an extension destination's printing capabilities. A
+     * EXTENSION_CAPABILITIES_SET event will be dispatched in response.
+     * @param {string} extensionId The ID of the extension from which the
+     *     capabilities should be requested.
+     * @param {string} printerId The ID of the printer whose capabilities are
+     *     requested.
+     */
+    startGetExtensionDestinationCapabilities: function(extensionId, printerId) {
+      chrome.send('getExtensionPrinterCapabilities', [extensionId, printerId]);
+    },
+
+    /**
      * Requests the destination's printing capabilities. A CAPABILITIES_SET
      * event will be dispatched in response.
      * @param {string} destinationId ID of the destination.
      */
     startGetLocalDestinationCapabilities: function(destinationId) {
       chrome.send('getPrinterCapabilities', [destinationId]);
     },
 
     /**
      * @param {!print_preview.Destination} destination Destination to print to.
@@ skipping 102 matching lines @@
      */
     startPrint: function(destination, printTicketStore, cloudPrintInterface,
                          documentInfo, opt_isOpenPdfInPreview,
                          opt_showSystemDialog) {
       assert(printTicketStore.isTicketValid(),
              'Trying to print when ticket is not valid');
 
       assert(!opt_showSystemDialog || (cr.isWindows && destination.isLocal),
              'Implemented for Windows only');
 
+      // TODO(tbarzic): Implement this.
+      assert(!destination.isExtension,
+             'Printing to extension printers not yet implemented.');
+
       var ticket = {
         'pageRange': printTicketStore.pageRange.getDocumentPageRanges(),
         'mediaSize': printTicketStore.mediaSize.getValue(),
         'pageCount': printTicketStore.pageRange.getPageNumberSet().size,
         'landscape': printTicketStore.landscape.getValue(),
         'color': this.getNativeColorModel_(destination, printTicketStore.color),
         'headerFooterEnabled': printTicketStore.headerFooter.getValue(),
         'marginsType': printTicketStore.marginsType.getValue(),
         'generateDraftData': true, // TODO(rltoscano): What should this be?
         'duplex': printTicketStore.duplex.getValue() ?
@@ skipping 401 matching lines @@
      * @private
      */
     onPrivetPrintFailed_: function(http_error) {
       var privetPrintFailedEvent =
             new Event(NativeLayer.EventType.PRIVET_PRINT_FAILED);
       privetPrintFailedEvent.httpError = http_error;
       this.dispatchEvent(privetPrintFailedEvent);
     },
 
     /**
+     * @param {Array.<{extensionId: string,
+     *                 id: string,
+     *                 name: string,
+     *                 description: (string|undefined)}>} printers The list
+     *     containing information about printers added by an extension.
+     * @param {boolean} done Whether this is the final list of extension
+     *     managed printers.
+     */
+    onExtensionPrintersAdded_: function(printers, done) {
+      var event = new Event(NativeLayer.EventType.EXTENSION_PRINTERS_ADDED);
+      event.printers = printers;
+      event.done = done;
+      this.dispatchEvent(event);
+    },
+
+    /**
+     * Called when an extension responds to a request for an extension printer
+     * capabilities.
+     * @param {string} extensionId The ID of extension that manages the printer.
+     * @param {string} printerId The printer's ID (within the extension's
+     *     space).
+     * @param {Object} capabilities The reported printer capabilities.
+     */
+    onExtensionCapabilitiesSet_: function(extensionId,
+                                          printerId,
+                                          capabilities) {
+      var event = new Event(NativeLayer.EventType.EXTENSION_CAPABILITIES_SET);
+      event.extensionID = extensionId;
+      event.printerID = printerId;
+      event.capabilities = capabilities;
+      this.dispatchEvent(event);
+    },
+
+   /**
      * Allows for onManipulateSettings to be called
      * from the native layer.
      * @private
      */
     onEnableManipulateSettingsForTest_: function() {
       global.onManipulateSettingsForTest =
           this.onManipulateSettingsForTest_.bind(this);
     },
 
     /**
@@ skipping 223 matching lines @@
       return this.serializedAppStateStr_;
     }
   };
 
   // Export
   return {
     NativeInitialSettings: NativeInitialSettings,
     NativeLayer: NativeLayer
   };
 });