Add source parameters to all remaining EventBus.dispatch calls that are currently missing those

This is necessary for subsequent patches, and will help avoid unnecessary event re-dispatching in cases where the event source is `window`.

web/app.js

@@ -160,7 +160,7 @@ let PDFViewerApplication = {
       this.l10n.translate(appContainer).then(() => {
         // Dispatch the 'localized' event on the `eventBus` once the viewer
         // has been fully initialized and translated.
-        this.eventBus.dispatch('localized');
+        this.eventBus.dispatch('localized', { source: this, });
       });
 
       this.initialized = true;
@@ -1371,14 +1371,15 @@ let PDFViewerApplication = {
     };
     _boundEvents.windowHashChange = () => {
       eventBus.dispatch('hashchange', {
+        source: window,
         hash: document.location.hash.substring(1),
       });
     };
     _boundEvents.windowBeforePrint = () => {
-      eventBus.dispatch('beforeprint');
+      eventBus.dispatch('beforeprint', { source: window, });
     };
     _boundEvents.windowAfterPrint = () => {
-      eventBus.dispatch('afterprint');
+      eventBus.dispatch('afterprint', { source: window, });
     };
 
     window.addEventListener('wheel', webViewerWheel);
@@ -1560,6 +1561,7 @@ function webViewerInitialized() {
         return;
       }
       PDFViewerApplication.eventBus.dispatch('fileinputchange', {
+        source: this,
         fileInput: evt.target,
       });
     });
@@ -1578,6 +1580,7 @@ function webViewerInitialized() {
         return;
       }
       PDFViewerApplication.eventBus.dispatch('fileinputchange', {
+        source: this,
         fileInput: evt.dataTransfer,
       });
     });

web/pdf_presentation_mode.js

@@ -60,19 +60,19 @@ class PDFPresentationMode {
     if (contextMenuItems) {
       contextMenuItems.contextFirstPage.addEventListener('click', () => {
         this.contextMenuOpen = false;
-        this.eventBus.dispatch('firstpage');
+        this.eventBus.dispatch('firstpage', { source: this, });
       });
       contextMenuItems.contextLastPage.addEventListener('click', () => {
         this.contextMenuOpen = false;
-        this.eventBus.dispatch('lastpage');
+        this.eventBus.dispatch('lastpage', { source: this, });
       });
       contextMenuItems.contextPageRotateCw.addEventListener('click', () => {
         this.contextMenuOpen = false;
-        this.eventBus.dispatch('rotatecw');
+        this.eventBus.dispatch('rotatecw', { source: this, });
       });
       contextMenuItems.contextPageRotateCcw.addEventListener('click', () => {
         this.contextMenuOpen = false;
-        this.eventBus.dispatch('rotateccw');
+        this.eventBus.dispatch('rotateccw', { source: this, });
       });
     }
   }

web/toolbar.js

@@ -100,19 +100,19 @@ class Toolbar {
     let self = this;
 
     items.previous.addEventListener('click', function() {
-      eventBus.dispatch('previouspage');
+      eventBus.dispatch('previouspage', { source: self, });
     });
 
     items.next.addEventListener('click', function() {
-      eventBus.dispatch('nextpage');
+      eventBus.dispatch('nextpage', { source: self, });
     });
 
     items.zoomIn.addEventListener('click', function() {
-      eventBus.dispatch('zoomin');
+      eventBus.dispatch('zoomin', { source: self, });
     });
 
     items.zoomOut.addEventListener('click', function() {
-      eventBus.dispatch('zoomout');
+      eventBus.dispatch('zoomout', { source: self, });
     });
 
     items.pageNumber.addEventListener('click', function() {
@@ -137,19 +137,19 @@ class Toolbar {
     });
 
     items.presentationModeButton.addEventListener('click', function() {
-      eventBus.dispatch('presentationmode');
+      eventBus.dispatch('presentationmode', { source: self, });
     });
 
     items.openFile.addEventListener('click', function() {
-      eventBus.dispatch('openfile');
+      eventBus.dispatch('openfile', { source: self, });
     });
 
     items.print.addEventListener('click', function() {
-      eventBus.dispatch('print');
+      eventBus.dispatch('print', { source: self, });
     });
 
     items.download.addEventListener('click', function() {
-      eventBus.dispatch('download');
+      eventBus.dispatch('download', { source: self, });
     });
 
     // Suppress context menus for some controls.