Add strict equalities in src/core/bidi.js

src/core/bidi.js

@@ -78,7 +78,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
 
   function findUnequal(arr, start, value) {
     for (var j = start, jj = arr.length; j < jj; ++j) {
-      if (arr[j] != value) {
+      if (arr[j] !== value) {
         return j;
       }
     }
@@ -138,7 +138,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
       } else if (0x0700 <= charCode && charCode <= 0x08AC) {
         charType = 'AL';
       }
-      if (charType == 'R' || charType == 'AL' || charType == 'AN') {
+      if (charType === 'R' || charType === 'AL' || charType === 'AN') {
         numBidi++;
       }
       types[i] = charType;
@@ -153,7 +153,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
       return createBidiText(str, isLTR);
     }
 
-    if (startLevel == -1) {
+    if (startLevel === -1) {
       if ((strLength / numBidi) < 0.3) {
         isLTR = true;
         startLevel = 0;
@@ -182,7 +182,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
      */
     var lastType = sor;
     for (i = 0; i < strLength; ++i) {
-      if (types[i] == 'NSM') {
+      if (types[i] === 'NSM') {
         types[i] = lastType;
       } else {
         lastType = types[i];
@@ -198,9 +198,9 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
     var t;
     for (i = 0; i < strLength; ++i) {
       t = types[i];
-      if (t == 'EN') {
+      if (t === 'EN') {
-        types[i] = (lastType == 'AL') ? 'AN' : 'EN';
+        types[i] = (lastType === 'AL') ? 'AN' : 'EN';
-      } else if (t == 'R' || t == 'L' || t == 'AL') {
+      } else if (t === 'R' || t === 'L' || t === 'AL') {
         lastType = t;
       }
     }
@@ -210,7 +210,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
      */
     for (i = 0; i < strLength; ++i) {
       t = types[i];
-      if (t == 'AL') {
+      if (t === 'AL') {
         types[i] = 'R';
       }
     }
@@ -221,11 +221,12 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
      type changes to that type:
      */
     for (i = 1; i < strLength - 1; ++i) {
-      if (types[i] == 'ES' && types[i - 1] == 'EN' && types[i + 1] == 'EN') {
+      if (types[i] === 'ES' && types[i - 1] === 'EN' && types[i + 1] === 'EN') {
         types[i] = 'EN';
       }
-      if (types[i] == 'CS' && (types[i - 1] == 'EN' || types[i - 1] == 'AN') &&
+      if (types[i] === 'CS' &&
-          types[i + 1] == types[i - 1]) {
+          (types[i - 1] === 'EN' || types[i - 1] === 'AN') &&
+          types[i + 1] === types[i - 1]) {
         types[i] = types[i - 1];
       }
     }
@@ -235,18 +236,18 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
      to all European numbers:
      */
     for (i = 0; i < strLength; ++i) {
-      if (types[i] == 'EN') {
+      if (types[i] === 'EN') {
         // do before
         var j;
         for (j = i - 1; j >= 0; --j) {
-          if (types[j] != 'ET') {
+          if (types[j] !== 'ET') {
             break;
           }
           types[j] = 'EN';
         }
         // do after
         for (j = i + 1; j < strLength; --j) {
-          if (types[j] != 'ET') {
+          if (types[j] !== 'ET') {
             break;
           }
           types[j] = 'EN';
@@ -259,7 +260,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
      */
     for (i = 0; i < strLength; ++i) {
       t = types[i];
-      if (t == 'WS' || t == 'ES' || t == 'ET' || t == 'CS') {
+      if (t === 'WS' || t === 'ES' || t === 'ET' || t === 'CS') {
         types[i] = 'ON';
       }
     }
@@ -272,9 +273,9 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
     lastType = sor;
     for (i = 0; i < strLength; ++i) {
       t = types[i];
-      if (t == 'EN') {
+      if (t === 'EN') {
-        types[i] = ((lastType == 'L') ? 'L' : 'EN');
+        types[i] = ((lastType === 'L') ? 'L' : 'EN');
-      } else if (t == 'R' || t == 'L') {
+      } else if (t === 'R' || t === 'L') {
         lastType = t;
       }
     }
@@ -286,7 +287,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
      end-of-level-run (eor) are used at level run boundaries.
      */
     for (i = 0; i < strLength; ++i) {
-      if (types[i] == 'ON') {
+      if (types[i] === 'ON') {
         var end = findUnequal(types, i + 1, 'ON');
         var before = sor;
         if (i > 0) {
@@ -297,13 +298,13 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
         if (end + 1 < strLength) {
           after = types[end + 1];
         }
-        if (before != 'L') {
+        if (before !== 'L') {
           before = 'R';
         }
-        if (after != 'L') {
+        if (after !== 'L') {
           after = 'R';
         }
-        if (before == after) {
+        if (before === after) {
           setValues(types, i, end, before);
         }
         i = end - 1; // reset to end (-1 so next iteration is ok)
@@ -314,7 +315,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
      N2. Any remaining neutrals take the embedding direction.
      */
     for (i = 0; i < strLength; ++i) {
-      if (types[i] == 'ON') {
+      if (types[i] === 'ON') {
         types[i] = e;
       }
     }
@@ -329,13 +330,13 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
     for (i = 0; i < strLength; ++i) {
       t = types[i];
       if (isEven(levels[i])) {
-        if (t == 'R') {
+        if (t === 'R') {
           levels[i] += 1;
-        } else if (t == 'AN' || t == 'EN') {
+        } else if (t === 'AN' || t === 'EN') {
           levels[i] += 2;
         }
       } else { // isOdd
-        if (t == 'L' || t == 'AN' || t == 'EN') {
+        if (t === 'L' || t === 'AN' || t === 'EN') {
           levels[i] += 1;
         }
       }
@@ -414,7 +415,7 @@ var bidi = PDFJS.bidi = (function bidiClosure() {
     var result = '';
     for (i = 0, ii = chars.length; i < ii; ++i) {
       var ch = chars[i];
-      if (ch != '<' && ch != '>') {
+      if (ch !== '<' && ch !== '>') {
         result += ch;
       }
     }