Fix a number of code style issues found by various ESLint rules, to make it easier to switch from JSHint to ESLint

extensions/chromium/pdfHandler.js

@@ -54,7 +54,7 @@ function isPdfDownloadable(details) {
  * @return {undefined|{name: string, value: string}} The header, if found.
  */
 function getHeaderFromHeaders(headers, headerName) {
-  for (var i=0; i<headers.length; ++i) {
+  for (var i = 0; i < headers.length; ++i) {
     var header = headers[i];
     if (header.name.toLowerCase() === headerName) {
       return header;
@@ -72,7 +72,7 @@ function getHeaderFromHeaders(headers, headerName) {
 function isPdfFile(details) {
   var header = getHeaderFromHeaders(details.responseHeaders, 'content-type');
   if (header) {
-    var headerValue = header.value.toLowerCase().split(';',1)[0].trim();
+    var headerValue = header.value.toLowerCase().split(';', 1)[0].trim();
     if (headerValue === 'application/pdf') {
       return true;
     }
@@ -153,7 +153,7 @@ chrome.webRequest.onHeadersReceived.addListener(
     ],
     types: ['main_frame', 'sub_frame']
   },
-  ['blocking','responseHeaders']);
+  ['blocking', 'responseHeaders']);
 
 chrome.webRequest.onBeforeRequest.addListener(
   function onBeforeRequestForFTP(details) {

extensions/firefox/content/PdfjsChromeUtils.jsm

@@ -338,4 +338,3 @@ var PdfjsChromeUtils = {
     });
   }
 };
-

external/builder/preprocessor2.js

@@ -68,7 +68,7 @@ function handlePreprocessorAction(ctx, actionName, args, loc) {
                                jsonPath.substring(ROOT_PREFIX.length));
         }
         var jsonContent = fs.readFileSync(jsonPath).toString();
-        var parsedJSON = esprima.parse('(' +jsonContent + ')');
+        var parsedJSON = esprima.parse('(' + jsonContent + ')');
         parsedJSON.body[0].expression.loc = loc;
         return parsedJSON.body[0].expression;
     }

external/crlfchecker/crlfchecker.js

@@ -24,4 +24,3 @@ function checkIfCrlfIsPresent(files) {
 }
 
 exports.checkIfCrlfIsPresent = checkIfCrlfIsPresent;
-

external/umdutils/verifier.js

@@ -210,7 +210,7 @@ function readDependencies(rootPaths) {
       }
     });
     if (discovered.length === 0) {
-      throw new Error ('Some circular references exist: somewhere at ' +
+      throw new Error('Some circular references exist: somewhere at ' +
         left.join(','));
     }
     discovered.sort();

gulpfile.js

@@ -197,7 +197,7 @@ function createBundle(defines) {
       case 'mainfile':
         // 'buildnumber' shall create BUILD_DIR for us
         tmpFile = BUILD_DIR + '~' + mainOutputName + '.tmp';
-        bundle('src/pdf.js', tmpFile, 'src/', mainFiles,  mainAMDName,
+        bundle('src/pdf.js', tmpFile, 'src/', mainFiles, mainAMDName,
           defines, true, versionJSON);
         this.push(new gutil.File({
           cwd: '',

make.js

@@ -883,7 +883,7 @@ target.chromium = function() {
         'extensions/chromium/*.html',
         'extensions/chromium/*.js',
         'extensions/chromium/*.css',
-        'extensions/chromium/icon*.png',],
+        'extensions/chromium/icon*.png'],
        CHROME_BUILD_DIR],
       ['extensions/chromium/pageAction/*.*', CHROME_BUILD_DIR + '/pageAction'],
       ['extensions/chromium/options/*.*', CHROME_BUILD_DIR + '/options'],

src/core/annotation.js

@@ -435,7 +435,7 @@ var Annotation = (function AnnotationClosure() {
         // Properties
       ]);
       var bbox = appearanceDict.getArray('BBox') || [0, 0, 1, 1];
-      var matrix = appearanceDict.getArray('Matrix') || [1, 0, 0, 1, 0 ,0];
+      var matrix = appearanceDict.getArray('Matrix') || [1, 0, 0, 1, 0, 0];
       var transform = getTransformMatrix(data.rect, bbox, matrix);
       var self = this;
 

src/core/chunked_stream.js

@@ -568,7 +568,7 @@ var ChunkedStreamManager = (function ChunkedStreamManagerClosure() {
       if (this.pdfNetworkStream) {
         this.pdfNetworkStream.cancelAllRequests('abort');
       }
-      for(var requestId in this.promisesByRequest) {
+      for (var requestId in this.promisesByRequest) {
         var capability = this.promisesByRequest[requestId];
         capability.reject(new Error('Request was aborted'));
       }

src/core/crypto.js

@@ -609,22 +609,22 @@ var calculateSHA512 = (function calculateSHA512Closure() {
     var result;
     if (!mode384) {
       result = new Uint8Array(64);
-      h0.copyTo(result,0);
-      h1.copyTo(result,8);
-      h2.copyTo(result,16);
-      h3.copyTo(result,24);
-      h4.copyTo(result,32);
-      h5.copyTo(result,40);
-      h6.copyTo(result,48);
-      h7.copyTo(result,56);
+      h0.copyTo(result, 0);
+      h1.copyTo(result, 8);
+      h2.copyTo(result, 16);
+      h3.copyTo(result, 24);
+      h4.copyTo(result, 32);
+      h5.copyTo(result, 40);
+      h6.copyTo(result, 48);
+      h7.copyTo(result, 56);
     } else {
       result = new Uint8Array(48);
-      h0.copyTo(result,0);
-      h1.copyTo(result,8);
-      h2.copyTo(result,16);
-      h3.copyTo(result,24);
-      h4.copyTo(result,32);
-      h5.copyTo(result,40);
+      h0.copyTo(result, 0);
+      h1.copyTo(result, 8);
+      h2.copyTo(result, 16);
+      h3.copyTo(result, 24);
+      h4.copyTo(result, 32);
+      h5.copyTo(result, 40);
     }
     return result;
   }
@@ -1729,21 +1729,21 @@ var PDF20 = (function PDF20Closure() {
 
 var CipherTransform = (function CipherTransformClosure() {
   function CipherTransform(stringCipherConstructor, streamCipherConstructor) {
-    this.stringCipherConstructor = stringCipherConstructor;
-    this.streamCipherConstructor = streamCipherConstructor;
+    this.StringCipherConstructor = stringCipherConstructor;
+    this.StreamCipherConstructor = streamCipherConstructor;
   }
 
   CipherTransform.prototype = {
     createStream: function CipherTransform_createStream(stream, length) {
-      var cipher = new this.streamCipherConstructor();
+      var cipher = new this.StreamCipherConstructor();
       return new DecryptStream(stream, length,
         function cipherTransformDecryptStream(data, finalize) {
           return cipher.decryptBlock(data, finalize);
         }
       );
     },
     decryptString: function CipherTransform_decryptString(s) {
-      var cipher = new this.stringCipherConstructor();
+      var cipher = new this.StringCipherConstructor();
       var data = stringToBytes(s);
       data = cipher.decryptBlock(data, true);
       return bytesToString(data);
@@ -2057,17 +2057,17 @@ var CipherTransformFactory = (function CipherTransformFactoryClosure() {
         return new NullCipher();
       };
     }
-    if ('V2' === cfm.name) {
+    if (cfm.name === 'V2') {
       return function cipherTransformFactoryBuildCipherConstructorV2() {
         return new ARCFourCipher(buildObjectKey(num, gen, key, false));
       };
     }
-    if ('AESV2' === cfm.name) {
+    if (cfm.name === 'AESV2') {
       return function cipherTransformFactoryBuildCipherConstructorAESV2() {
         return new AES128Cipher(buildObjectKey(num, gen, key, true));
       };
     }
-    if ('AESV3' === cfm.name) {
+    if (cfm.name === 'AESV3') {
       return function cipherTransformFactoryBuildCipherConstructorAESV3() {
         return new AES256Cipher(key);
       };

src/core/font_renderer.js

@@ -437,7 +437,7 @@ var FontRendererFactory = (function FontRendererFactoryClosure() {
                 x = xb; y = yb;
                 if (Math.abs(x - x0) > Math.abs(y - y0)) {
                   x += stack.shift();
-                } else  {
+                } else {
                   y += stack.shift();
                 }
                 bezierCurveTo(xa, ya, xb, yb, x, y);

src/core/fonts.js

@@ -2943,6 +2943,7 @@ var ErrorFont = (function ErrorFontClosure() {
 function type1FontGlyphMapping(properties, builtInEncoding, glyphNames) {
   var charCodeToGlyphId = Object.create(null);
   var glyphId, charCode, baseEncoding;
+  var isSymbolicFont = !!(properties.flags & FontFlags.Symbolic);
 
   if (properties.baseEncodingName) {
     // If a valid base encoding name was used, the mapping is initialized with
@@ -2956,9 +2957,8 @@ function type1FontGlyphMapping(properties, builtInEncoding, glyphNames) {
         charCodeToGlyphId[charCode] = 0; // notdef
       }
     }
-  } else if (!!(properties.flags & FontFlags.Symbolic)) {
-    // For a symbolic font the encoding should be the fonts built-in
-    // encoding.
+  } else if (isSymbolicFont) {
+    // For a symbolic font the encoding should be the fonts built-in encoding.
     for (charCode in builtInEncoding) {
       charCodeToGlyphId[charCode] = builtInEncoding[charCode];
     }

src/core/jbig2.js

@@ -977,7 +977,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
       var combinationOperator = pageInfo.combinationOperatorOverride ?
         regionInfo.combinationOperator : pageInfo.combinationOperator;
       var buffer = this.buffer;
-      var mask0 =  128 >> (regionInfo.x & 7);
+      var mask0 = 128 >> (regionInfo.x & 7);
       var offset0 = regionInfo.y * rowSize + (regionInfo.x >> 3);
       var i, j, mask, offset;
       switch (combinationOperator) {

src/core/jpg.js

@@ -616,7 +616,7 @@ var JpegImage = (function JpegImageClosure() {
           component = frame.components[i];
           var blocksPerLine = Math.ceil(Math.ceil(frame.samplesPerLine / 8) *
                                         component.h / frame.maxH);
-          var blocksPerColumn = Math.ceil(Math.ceil(frame.scanLines  / 8) *
+          var blocksPerColumn = Math.ceil(Math.ceil(frame.scanLines / 8) *
                                           component.v / frame.maxV);
           var blocksPerLineForMcu = mcusPerLine * component.h;
           var blocksPerColumnForMcu = mcusPerColumn * component.v;

src/core/jpx.js

@@ -1484,7 +1484,7 @@ var JpxImage = (function JpxImageClosure() {
       var qcdOrQcc = (context.currentTile.QCC[c] !== undefined ?
         context.currentTile.QCC[c] : context.currentTile.QCD);
       component.quantizationParameters = qcdOrQcc;
-      var codOrCoc = (context.currentTile.COC[c] !== undefined  ?
+      var codOrCoc = (context.currentTile.COC[c] !== undefined ?
         context.currentTile.COC[c] : context.currentTile.COD);
       component.codingStyleParameters = codOrCoc;
     }
@@ -1552,7 +1552,7 @@ var JpxImage = (function JpxImageClosure() {
   })();
 
   var InclusionTree = (function InclusionTreeClosure() {
-    function InclusionTree(width, height,  defaultValue) {
+    function InclusionTree(width, height, defaultValue) {
       var levelsLength = log2(Math.max(width, height)) + 1;
       this.levels = [];
       for (var i = 0; i < levelsLength; i++) {

src/core/murmurhash3.js

@@ -32,12 +32,12 @@
 
 var Uint32ArrayView = sharedUtil.Uint32ArrayView;
 
-var MurmurHash3_64 = (function MurmurHash3_64Closure (seed) {
+var MurmurHash3_64 = (function MurmurHash3_64Closure(seed) {
   // Workaround for missing math precision in JS.
   var MASK_HIGH = 0xffff0000;
   var MASK_LOW = 0xffff;
 
-  function MurmurHash3_64 (seed) {
+  function MurmurHash3_64(seed) {
     var SEED = 0xc3d2e1f0;
     this.h1 = seed ? seed & 0xffffffff : SEED;
     this.h2 = seed ? seed & 0xffffffff : SEED;
@@ -145,7 +145,7 @@ var MurmurHash3_64 = (function MurmurHash3_64Closure (seed) {
       return this;
     },
 
-    hexdigest: function MurmurHash3_64_hexdigest () {
+    hexdigest: function MurmurHash3_64_hexdigest() {
       var h1 = this.h1;
       var h2 = this.h2;
 

src/core/parser.js

@@ -895,7 +895,7 @@ var Lexer = (function LexerClosure() {
             var x2 = toHexDigit(ch);
             if (x2 === -1) {
               warn('Lexer_getName: Illegal digit (' +
-                   String.fromCharCode(ch) +') in hexadecimal number.');
+                   String.fromCharCode(ch) + ') in hexadecimal number.');
               strBuf.push('#', String.fromCharCode(previousCh));
               if (specialChars[ch]) {
                 break;

src/core/pdf_manager.js

@@ -210,7 +210,7 @@ var NetworkPdfManager = (function NetworkPdfManagerClosure() {
               result = value;
             }
             resolve(result);
-          } catch(e) {
+          } catch (e) {
             if (!(e instanceof MissingDataException)) {
               reject(e);
               return;

src/core/type1_parser.js

@@ -86,7 +86,7 @@ var Type1CharString = (function Type1CharStringClosure() {
     'rrcurveto': [8],
     'callsubr': [10],
     'flex': [12, 35],
-    'drop' : [12, 18],
+    'drop': [12, 18],
     'endchar': [14],
     'rmoveto': [21],
     'hmoveto': [22],
@@ -483,7 +483,7 @@ var Type1Parser = (function Type1ParserClosure() {
       return token === 'true' ? 1 : 0;
     },
 
-    nextChar : function Type1_nextChar() {
+    nextChar: function Type1_nextChar() {
       return (this.currentChar = this.stream.getByte());
     },
 
@@ -550,7 +550,7 @@ var Type1Parser = (function Type1ParserClosure() {
             this.getToken(); // read in 'dict'
             this.getToken(); // read in 'dup'
             this.getToken(); // read in 'begin'
-            while(true) {
+            while (true) {
               token = this.getToken();
               if (token === null || token === 'end') {
                 break;

src/display/api.js

@@ -1314,7 +1314,7 @@ var PDFWorker = (function PDFWorkerClosure() {
             }
             try {
               sendTest();
-            } catch (e)  {
+            } catch (e) {
               // We need fallback to a faked worker.
               this._setupFakeWorker();
             }

src/display/canvas.js

@@ -654,7 +654,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
     }
     if (sourceCtx.setLineDash !== undefined) {
       destCtx.setLineDash(sourceCtx.getLineDash());
-      destCtx.lineDashOffset =  sourceCtx.lineDashOffset;
+      destCtx.lineDashOffset = sourceCtx.lineDashOffset;
     }
   }
 
@@ -1780,13 +1780,13 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
       this.save();
       this.baseTransformStack.push(this.baseTransform);
 
-      if (isArray(matrix) && 6 === matrix.length) {
+      if (isArray(matrix) && matrix.length === 6) {
         this.transform.apply(this, matrix);
       }
 
       this.baseTransform = this.ctx.mozCurrentTransform;
 
-      if (isArray(bbox) && 4 === bbox.length) {
+      if (isArray(bbox) && bbox.length === 4) {
         var width = bbox[2] - bbox[0];
         var height = bbox[3] - bbox[1];
         this.ctx.rect(bbox[0], bbox[1], width, height);
@@ -1862,7 +1862,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
       var cacheId = 'groupAt' + this.groupLevel;
       if (group.smask) {
         // Using two cache entries is case if masks are used one after another.
-        cacheId +=  '_smask_' + ((this.smaskCounter++) % 2);
+        cacheId += '_smask_' + ((this.smaskCounter++) % 2);
       }
       var scratchCanvas = this.cachedCanvases.getCanvas(
         cacheId, drawnWidth, drawnHeight, true);
@@ -1947,7 +1947,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
                                                              matrix) {
       this.save();
 
-      if (isArray(rect) && 4 === rect.length) {
+      if (isArray(rect) && rect.length === 4) {
         var width = rect[2] - rect[0];
         var height = rect[3] - rect[1];
         this.ctx.rect(rect[0], rect[1], width, height);

src/display/svg.js

@@ -841,7 +841,7 @@ var SVGGraphics = (function SVGGraphicsClosure() {
             var height = args[j++];
             var xw = x + width;
             var yh = y + height;
-            d.push('M', pf(x), pf(y), 'L', pf(xw) , pf(y), 'L', pf(xw), pf(yh),
+            d.push('M', pf(x), pf(y), 'L', pf(xw), pf(y), 'L', pf(xw), pf(yh),
                    'L', pf(x), pf(yh), 'Z');
             break;
           case OPS.moveTo:
@@ -852,7 +852,7 @@ var SVGGraphics = (function SVGGraphicsClosure() {
           case OPS.lineTo:
             x = args[j++];
             y = args[j++];
-            d.push('L', pf(x) , pf(y));
+            d.push('L', pf(x), pf(y));
             break;
           case OPS.curveTo:
             x = args[j + 4];

src/display/text_layer.js

@@ -374,7 +374,7 @@ var renderTextLayer = (function renderTextLayerClosure() {
         i++;
       }
       var j = horizon.length - 1;
-      while(j >= 0 && horizon[j].start >= boundary.y2) {
+      while (j >= 0 && horizon[j].start >= boundary.y2) {
         j--;
       }