Refactor PDFDocumentProperties to be more class-like

web/pdf_document_properties.js

@@ -18,42 +18,33 @@
 
 'use strict';
 
-var PDFDocumentProperties = {
-  overlayName: null,
-  rawFileSize: 0,
-
-  // Document property fields (in the viewer).
-  fileNameField: null,
-  fileSizeField: null,
-  titleField: null,
-  authorField: null,
-  subjectField: null,
-  keywordsField: null,
-  creationDateField: null,
-  modificationDateField: null,
-  creatorField: null,
-  producerField: null,
-  versionField: null,
-  pageCountField: null,
-  url: null,
-  pdfDocument: null,
-
-  initialize: function documentPropertiesInitialize(options) {
+/**
+ * @class
+ */
+var PDFDocumentProperties = (function PDFDocumentPropertiesClosure() {
+  /**
+   * @constructs PDFDocumentProperties
+   * @param {PDFDocumentPropertiesOptions} options
+   */
+  function PDFDocumentProperties(options) {
+    this.rawFileSize = 0;
+    this.url = null;
+    this.pdfDocument = null;
     this.overlayName = options.overlayName;
 
     // Set the document property fields.
-    this.fileNameField = options.fileNameField;
-    this.fileSizeField = options.fileSizeField;
-    this.titleField = options.titleField;
-    this.authorField = options.authorField;
-    this.subjectField = options.subjectField;
-    this.keywordsField = options.keywordsField;
-    this.creationDateField = options.creationDateField;
-    this.modificationDateField = options.modificationDateField;
-    this.creatorField = options.creatorField;
-    this.producerField = options.producerField;
-    this.versionField = options.versionField;
-    this.pageCountField = options.pageCountField;
+    this.fileNameField = options.fileNameField || null;
+    this.fileSizeField = options.fileSizeField || null;
+    this.titleField = options.titleField || null;
+    this.authorField = options.authorField || null;
+    this.subjectField = options.subjectField || null;
+    this.keywordsField = options.keywordsField || null;
+    this.creationDateField = options.creationDateField || null;
+    this.modificationDateField = options.modificationDateField || null;
+    this.creatorField = options.creatorField || null;
+    this.producerField = options.producerField || null;
+    this.versionField = options.versionField || null;
+    this.pageCountField = options.pageCountField || null;
 
     // Bind the event listener for the Close button.
     if (options.closeButton) {
@@ -65,9 +56,10 @@ var PDFDocumentProperties = {
     }.bind(this));
 
     OverlayManager.register(this.overlayName, this.close.bind(this));
-  },
+  }
 
-  getProperties: function documentPropertiesGetProperties() {
+  PDFDocumentProperties.prototype = {
+    getProperties: function PDFDocumentProperties_getProperties() {
       if (!OverlayManager.active) {
         // If the dialog was closed before dataAvailablePromise was resolved,
         // don't bother updating the properties.
@@ -110,19 +102,19 @@ var PDFDocumentProperties = {
       }.bind(this));
     },
 
-  updateUI: function documentPropertiesUpdateUI(field, content) {
+    updateUI: function PDFDocumentProperties_updateUI(field, content) {
       if (field && content !== undefined && content !== '') {
         field.textContent = content;
       }
     },
 
-  setFileSize: function documentPropertiesSetFileSize(fileSize) {
+    setFileSize: function PDFDocumentProperties_setFileSize(fileSize) {
       if (fileSize > 0) {
         this.rawFileSize = fileSize;
       }
     },
 
-  parseFileSize: function documentPropertiesParseFileSize() {
+    parseFileSize: function PDFDocumentProperties_parseFileSize() {
       var fileSize = this.rawFileSize, kb = fileSize / 1024;
       if (!kb) {
         return;
@@ -139,18 +131,18 @@ var PDFDocumentProperties = {
       }
     },
 
-  open: function documentPropertiesOpen() {
+    open: function PDFDocumentProperties_open() {
       Promise.all([OverlayManager.open(this.overlayName),
                    this.dataAvailablePromise]).then(function () {
         this.getProperties();
       }.bind(this));
     },
 
-  close: function documentPropertiesClose() {
+    close: function PDFDocumentProperties_close() {
       OverlayManager.close(this.overlayName);
     },
 
-  parseDate: function documentPropertiesParseDate(inputDate) {
+    parseDate: function PDFDocumentProperties_parseDate(inputDate) {
       // This is implemented according to the PDF specification, but note that
       // Adobe Reader doesn't handle changing the date to universal time
       // and doesn't use the user's time zone (they're effectively ignoring
@@ -197,3 +189,6 @@ var PDFDocumentProperties = {
                          '{{date}}, {{time}}');
     }
   };
+
+  return PDFDocumentProperties;
+})();

web/viewer.js

@@ -109,6 +109,8 @@ var PDFViewerApplication = {
   pdfRenderingQueue: null,
   /** @type {PDFPresentationMode} */
   pdfPresentationMode: null,
+  /** @type {PDFDocumentProperties} */
+  pdfDocumentProperties: null,
   pageRotation: 0,
   updateScaleControls: true,
   isInitialViewSet: false,
@@ -172,6 +174,23 @@ var PDFViewerApplication = {
       toggleHandTool: document.getElementById('toggleHandTool')
     });
 
+    this.pdfDocumentProperties = new PDFDocumentProperties({
+      overlayName: 'documentPropertiesOverlay',
+      closeButton: document.getElementById('documentPropertiesClose'),
+      fileNameField: document.getElementById('fileNameField'),
+      fileSizeField: document.getElementById('fileSizeField'),
+      titleField: document.getElementById('titleField'),
+      authorField: document.getElementById('authorField'),
+      subjectField: document.getElementById('subjectField'),
+      keywordsField: document.getElementById('keywordsField'),
+      creationDateField: document.getElementById('creationDateField'),
+      modificationDateField: document.getElementById('modificationDateField'),
+      creatorField: document.getElementById('creatorField'),
+      producerField: document.getElementById('producerField'),
+      versionField: document.getElementById('versionField'),
+      pageCountField: document.getElementById('pageCountField')
+    });
+
     SecondaryToolbar.initialize({
       toolbar: document.getElementById('secondaryToolbar'),
       toggleButton: document.getElementById('secondaryToolbarToggle'),
@@ -185,7 +204,7 @@ var PDFViewerApplication = {
       lastPage: document.getElementById('lastPage'),
       pageRotateCw: document.getElementById('pageRotateCw'),
       pageRotateCcw: document.getElementById('pageRotateCcw'),
-      documentProperties: PDFDocumentProperties,
+      documentProperties: this.pdfDocumentProperties,
       documentPropertiesButton: document.getElementById('documentProperties')
     });
 
@@ -216,23 +235,6 @@ var PDFViewerApplication = {
       passwordCancel: document.getElementById('passwordCancel')
     });
 
-    PDFDocumentProperties.initialize({
-      overlayName: 'documentPropertiesOverlay',
-      closeButton: document.getElementById('documentPropertiesClose'),
-      fileNameField: document.getElementById('fileNameField'),
-      fileSizeField: document.getElementById('fileSizeField'),
-      titleField: document.getElementById('titleField'),
-      authorField: document.getElementById('authorField'),
-      subjectField: document.getElementById('subjectField'),
-      keywordsField: document.getElementById('keywordsField'),
-      creationDateField: document.getElementById('creationDateField'),
-      modificationDateField: document.getElementById('modificationDateField'),
-      creatorField: document.getElementById('creatorField'),
-      producerField: document.getElementById('producerField'),
-      versionField: document.getElementById('versionField'),
-      pageCountField: document.getElementById('pageCountField')
-    });
-
     var self = this;
     var initializedPromise = Promise.all([
       Preferences.get('enableWebGL').then(function resolved(value) {
@@ -410,7 +412,8 @@ var PDFViewerApplication = {
                                     pdfDataRangeTransport);
 
           if (args.length) {
-            PDFDocumentProperties.setFileSize(args.length);
+            PDFViewerApplication.pdfDocumentProperties
+                                .setFileSize(args.length);
           }
           break;
         case 'range':
@@ -556,7 +559,7 @@ var PDFViewerApplication = {
     );
 
     if (args && args.length) {
-      PDFDocumentProperties.setFileSize(args.length);
+      PDFViewerApplication.pdfDocumentProperties.setFileSize(args.length);
     }
   },
 
@@ -853,9 +856,9 @@ var PDFViewerApplication = {
 
     this.pdfDocument = pdfDocument;
 
-    PDFDocumentProperties.url = this.url;
-    PDFDocumentProperties.pdfDocument = pdfDocument;
-    PDFDocumentProperties.resolveDataAvailable();
+    this.pdfDocumentProperties.url = this.url;
+    this.pdfDocumentProperties.pdfDocument = pdfDocument;
+    this.pdfDocumentProperties.resolveDataAvailable();
 
     var downloadedPromise = pdfDocument.getDownloadInfo().then(function() {
       self.downloadComplete = true;