Add media size capability to PDF printer.

chrome/browser/resources/print_preview/data/destination_store.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.define('print_preview', function() {
   'use strict';
 
   /**
    * A data store that stores destinations and dispatches events when the data
    * store changes.
@@ skipping 176 matching lines @@
 
   /**
    * Amount of time spent searching for privet destination, in milliseconds.
    * @type {number}
    * @const
    * @private
    */
   DestinationStore.PRIVET_SEARCH_DURATION_ = 2000;
 
   /**
-   * Creates a local PDF print destination.
-   * @return {!print_preview.Destination} Created print destination.
+   * Localizes printer capabilities.
+   * @param {!Object} capabilities Printer capabilities to localize.
+   * @return {!Object} Localized capabilities.
    * @private
    */
-  DestinationStore.createLocalPdfPrintDestination_ = function() {
-    var dest = new print_preview.Destination(
-        print_preview.Destination.GooglePromotedId.SAVE_AS_PDF,
-        print_preview.Destination.Type.LOCAL,
-        print_preview.Destination.Origin.LOCAL,
-        localStrings.getString('printToPDF'),
-        false /*isRecent*/,
-        print_preview.Destination.ConnectionStatus.ONLINE);
-    dest.capabilities = {
-      version: '1.0',
-      printer: {
-        page_orientation: {
-          option: [
-            {type: 'AUTO', is_default: true},
-            {type: 'PORTRAIT'},
-            {type: 'LANDSCAPE'}
-          ]
-        },
-        color: { option: [{type: 'STANDARD_COLOR', is_default: true}] }
+  DestinationStore.localizeCapabilities_ = function(capabilities) {
+    var mediaSize = capabilities.printer.media_size;
+    if (mediaSize) {
+      var mediaDisplayNames = {
+        'ISO_A4': 'A4',
+        'ISO_A3': 'A3',
+        'NA_LETTER': 'Letter',
+        'NA_LEGAL': 'Legal',
+        'NA_LEDGER': 'Tabloid'

[Lei Zhang, 2016/10/22 02:09:48]

Question - why is NA_LEDGER translated into 'Tabloid' here?

[Aleksey Shlyapnikov, 2016/10/22 02:28:09]

Those NA_ names come from CDD
(https://developers.google.com/cloud-print/docs/cdd) and the only value there
referring to media sized 11 by 17 inches, landscape or portrait, is NA_LEDGER.
Now, Ledger is landscape, but Chrome default is portrait orientation, and 11x17
portrait media is called Tabloid, hence the choice of the name.

+      };
+      for (var i = 0, media; media = mediaSize.option[i]; i++) {
+        media.custom_display_name = mediaDisplayNames[media.name] || media.name;
       }
-    };
-    return dest;
+    }
+    return capabilities;
   };
 
   DestinationStore.prototype = {
     __proto__: cr.EventTarget.prototype,
 
     /**
      * @param {string=} opt_account Account to filter destinations by. When
      *     omitted, all destinations are returned.
      * @return {!Array.<!print_preview.Destination>} List of destinations
      *     accessible by the {@code account}.
@@ skipping 416 matching lines @@
           this.nativeLayer_,
           print_preview.NativeLayer.EventType.PRIVET_PRINTER_CHANGED,
           this.onPrivetPrinterAdded_.bind(this));
       this.tracker_.add(
           this.nativeLayer_,
           print_preview.NativeLayer.EventType.PRIVET_CAPABILITIES_SET,
           this.onPrivetCapabilitiesSet_.bind(this));
     },
 
     /**
+     * Creates a local PDF print destination.
+     * @return {!print_preview.Destination} Created print destination.
+     * @private
+     */
+    createLocalPdfPrintDestination_: function() {
+      return new print_preview.Destination(
+          print_preview.Destination.GooglePromotedId.SAVE_AS_PDF,
+          print_preview.Destination.Type.LOCAL,
+          print_preview.Destination.Origin.LOCAL,
+          localStrings.getString('printToPDF'),
+          false /*isRecent*/,
+          print_preview.Destination.ConnectionStatus.ONLINE);
+    },
+
+    /**
      * Resets the state of the destination store to its initial state.
      * @private
      */
     reset_: function() {
       this.destinations_ = [];
       this.destinationMap_ = {};
       this.selectDestination(null);
       this.loadedCloudOrigins_ = {};
       this.hasLoadedAllLocalDestinations_ = false;
-      this.insertDestination_(
-          DestinationStore.createLocalPdfPrintDestination_());
+      // TODO(alekseys): Create PDF printer in the native code and send its
+      // capabilities back with other local printers.
+      this.insertDestination_(this.createLocalPdfPrintDestination_());
       this.resetAutoSelectTimeout_();
     },
 
     /**
      * Resets destination auto selection timeout.
      * @private
      */
     resetAutoSelectTimeout_: function() {
       this.cancelAutoSelectTimeout_();
       this.autoSelectTimeout_ =
@@ skipping 36 matching lines @@
      *     destination.
      * @private
      */
     onLocalDestinationCapabilitiesSet_: function(event) {
       var destinationId = event.settingsInfo['printerId'];
       var key = this.getDestinationKey_(
           print_preview.Destination.Origin.LOCAL,
           destinationId,
           '');
       var destination = this.destinationMap_[key];
-      var capabilities = print_preview.LocalCapabilitiesParser.parse(
+      // Special case for PDF printer (until local printers capabilities are
+      // reported in CDD format too).
+      if (destinationId ==
+          print_preview.Destination.GooglePromotedId.SAVE_AS_PDF) {
+        if (destination) {
+          destination.capabilities = DestinationStore.localizeCapabilities_(
+              event.settingsInfo.capabilities);
+        }
+      } else {
+        var capabilities = print_preview.LocalCapabilitiesParser.parse(
             event.settingsInfo);
-      if (destination) {
-        // In case there were multiple capabilities request for this local
-        // destination, just ignore the later ones.
-        if (destination.capabilities != null) {
-          return;
+        if (destination) {
+          // In case there were multiple capabilities request for this local
+          // destination, just ignore the later ones.
+          if (destination.capabilities != null) {
+            return;
+          }
+          destination.capabilities = capabilities;
+        } else {
+          // TODO(rltoscano): This makes the assumption that the "deviceName" is
+          // the same as "printerName". We should include the "printerName" in
+          // the response. See http://crbug.com/132831.
+          destination = print_preview.LocalDestinationParser.parse(
+              {deviceName: destinationId, printerName: destinationId});
+          destination.capabilities = capabilities;
+          this.insertDestination_(destination);
         }
-        destination.capabilities = capabilities;
-      } else {
-        // TODO(rltoscano): This makes the assumption that the "deviceName" is
-        // the same as "printerName". We should include the "printerName" in the
-        // response. See http://crbug.com/132831.
-        destination = print_preview.LocalDestinationParser.parse(
-            {deviceName: destinationId, printerName: destinationId});
-        destination.capabilities = capabilities;
-        this.insertDestination_(destination);
       }
       if (this.selectedDestination_ &&
           this.selectedDestination_.id == destinationId) {
         cr.dispatchSimpleEvent(this,
                                DestinationStore.EventType.
                                    SELECTED_DESTINATION_CAPABILITIES_READY);
       }
     },
 
     /**
@@ skipping 161 matching lines @@
       return id == this.appState_.selectedDestinationId &&
              origin == this.appState_.selectedDestinationOrigin;
     }
   };
 
   // Export
   return {
     DestinationStore: DestinationStore
   };
 });