Address Yurys review comments

src/evaluator.js

@@ -509,19 +509,15 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
 
     getTextContent: function partialEvaluatorGetIRQueue(
                                                     stream, resources, state) {
-      var text;
+      var bidiTexts;
-      var dirs;
 
       if (!state) {
-        text = [];
+        bidiTexts = [];
-        dirs = [];
         state = {
-          text: text,
+          bidiTexts: bidiTexts
-          dirs: dirs
         };
       } else {
-        text = state.text;
+        bidiTexts = state.bidiTexts;
-        dirs = state.dirs;
       }
 
       var self = this;
@@ -627,9 +623,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
           } // switch
 
           if (chunk !== '') {
-            var bidiText = PDFJS.bidi(chunk, -1);
+            bidiTexts.push(PDFJS.bidi(chunk, -1));
-            text.push(bidiText.str);
-            dirs.push(bidiText.ltr);
 
             chunk = '';
           }

src/fonts.js

@@ -3181,7 +3181,7 @@ var Font = (function FontClosure() {
     },
 
     get spaceWidth() {
-      if (this._shadowWidth !== undefined) {
+      if ('_shadowWidth' in this) {
         return this._shadowWidth;
       }
 
@@ -3212,6 +3212,8 @@ var Font = (function FontClosure() {
           break; // the non-zero width found
       }
       width = (width || this.defaultWidth) * this.widthMultiplier;
+      // Do not shadow the property here. See discussion:
+      // https://github.com/mozilla/pdf.js/pull/2127#discussion_r1662280
       this._shadowWidth = width;
       return width;
     },

test/driver.js

@@ -181,7 +181,7 @@ SimpleTextLayerBuilder.prototype = {
     ctx.stroke();
     ctx.fill();
 
-    var textContent = this.textContent.text[this.textCounter];
+    var textContent = this.textContent.bidiTexts[this.textCounter].str;
     ctx.font = fontHeight + 'px ' + fontName;
     ctx.fillStyle = 'black';
     ctx.fillText(textContent, geom.x, geom.y);

web/viewer.js

@@ -1930,15 +1930,14 @@ var TextLayerBuilder = function textLayerBuilder(textLayerDiv) {
     this.divContentDone = true;
 
     var textDivs = this.textDivs;
-    var textContent = this.textContent;
+    var bidiTexts = this.textContent.bidiTexts;
-    var text = textContent.text;
-    var dirs = textContent.dirs;
 
-    for (var i = 0; i < text.length; i++) {
+    for (var i = 0; i < bidiTexts.length; i++) {
+      var bidiText = bidiTexts[i];
       var textDiv = textDivs[i];
 
-      textDiv.textContent = text[i];
+      textDiv.textContent = bidiText.str;
-      textDiv.dir = dirs[i] ? 'ltr' : 'rtl';
+      textDiv.dir = bidiText.ltr ? 'ltr' : 'rtl';
     }
 
     this.setupRenderLayoutTimer();