fix: remove string.repeat for ie11 (#1772)

UziTech · web-flow · commit 27070705d3b5 · 2020-10-21T09:56:32.000-05:00
diff --git a/src/Lexer.js b/src/Lexer.js
@@ -1,6 +1,7 @@
 const Tokenizer = require('./Tokenizer.js');
 const { defaults } = require('./defaults.js');
 const { block, inline } = require('./rules.js');
+const { repeatString } = require('./helpers.js');
 
 /**
  * smartypants text replacement
@@ -340,14 +341,14 @@ module.exports = class Lexer {
       if (links.length > 0) {
         while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
           if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
-            maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+            maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
           }
         }
       }
     }
     // Mask out other blocks
     while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
-      maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+      maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
     }
 
     while (src) {
diff --git a/src/helpers.js b/src/helpers.js
@@ -228,6 +228,22 @@ function checkSanitizeDeprecation(opt) {
   }
 }
 
+// copied from https://stackoverflow.com/a/5450113/806777
+function repeatString(pattern, count) {
+  if (count < 1) {
+    return '';
+  }
+  let result = '';
+  while (count > 1) {
+    if (count & 1) {
+      result += pattern;
+    }
+    count >>= 1;
+    pattern += pattern;
+  }
+  return result + pattern;
+}
+
 module.exports = {
   escape,
   unescape,
@@ -239,5 +255,6 @@ module.exports = {
   splitCells,
   rtrim,
   findClosingBracket,
-  checkSanitizeDeprecation
+  checkSanitizeDeprecation,
+  repeatString
 };

Original file line number	Diff line number	Diff line change
`@@ -1,6 +1,7 @@`
`1`	`1`	`const Tokenizer = require('./Tokenizer.js');`
`2`	`2`	`const { defaults } = require('./defaults.js');`
`3`	`3`	`const { block, inline } = require('./rules.js');`
	`4`	`+const { repeatString } = require('./helpers.js');`
`4`	`5`
`5`	`6`	`/**`
`6`	`7`	`* smartypants text replacement`
`@@ -340,14 +341,14 @@ module.exports = class Lexer {`
`340`	`341`	`if (links.length > 0) {`
`341`	`342`	`while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {`
`342`	`343`	`if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {`
`343`		`- maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);`
	`344`	`+ maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);`
`344`	`345`	`}`
`345`	`346`	`}`
`346`	`347`	`}`
`347`	`348`	`}`
`348`	`349`	`// Mask out other blocks`
`349`	`350`	`while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {`
`350`		`- maskedSrc = maskedSrc.slice(0, match.index) + '[' + 'a'.repeat(match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);`
	`351`	`+ maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);`
`351`	`352`	`}`
`352`	`353`
`353`	`354`	`while (src) {`