Add truncate function like lodash.truncate

Author: greenlikeorange

README.md

@@ -49,6 +49,7 @@ Using CDN
 | `fontConvert` | `content: String(require)`,<br>`targetFontType: fontName(require)`,<br>`orignalFontType: fontName(optional)`| `String` | Converting font to target font type. This method need spelling fix, so it gonna use **spellingFix** in default. **convertFrom** will be detect by **fontDetect** when you don't described.<hr> `fontName` must be one of `unicode` or `zawgyi`. |
 | `syllBreak` | `content: String(require)`,<br>`fontType: fontName(optional)`,<br>`breakPoint: String(optional)` | `String` |To make systematic word break of Myanmar text. convertFrom will be detect by fontDetect when you don't described.<hr> `fontName` must be one of `unicode` or `zawgyi`. |
 | `spellingFix` | `content: String(require)`,<br>`fontType: fontName(optional)` | `String` | **convertFrom** will be detect by **fontDetect** when you don't described. It fix spelling on Myanmar Text.<hr> `fontName` must be one of `unicode` or `zawgyi`. |
+| `truncate` | `content: String(requre)`,<br>`options: Object` | `String` | Like lodash.truncate, it truncate word syllable and space. Default truncate length is 30 and you can change it in `options.length` |
 
 ## Usage
 
@@ -84,6 +85,16 @@ knayi.syllBreak('မင်္ဂလာပါ', null, '$$') // 'မင်္ဂ
 knayi.spellingFix('မင်္ဂလာာပါါ') // 'မင်္ဂလာပါ'
 ```
 
+- **truncate(content [, options])**
+```javascript
+knayi.truncate('အာယုဝဍ်ဎနဆေးညွှန်းစာကို ဇလွန်ဈေးဘေးဗာဒံပင်ထက် အဓိဋ္ဌာန်လျက် ဂဃနဏဖတ်ခဲ့သည်။', { length: 30, omission: '...' });
+// "အာယုဝဍ်ဎနဆေးညွှန်းစာကို ဈေး..."
+```
+**options of truncate**
+- `length: Number` default is 30
+- `omission:String` default is '...'
+- `fontType: String` it automatically detect if it not specified
+
 ## Using googlei18n/myanmartools in detector.js
 
 Now you can now use `googlei18n/myanmartools` library in detector.

dist/knayi-myscript.es.js

@@ -0,0 +1,43 @@
+const fontDetect = require('./detector');
+const syllBreak = require('./syllBreak');
+const globalOptions = require('./globalOptions');
+
+const mmCharacterRange = /[\u1000-\u109F]/;
+
+function truncate(content, options) {
+  options = options || {};
+  var fontType = options.fontType;
+  var length = options.length || 30;
+  var omission = options.omission || '...';
+  
+  var absoulteLength = length - omission.length;
+
+  if (content === '' || !mmCharacterRange.test(content))
+    return content.substr(0, absoulteLength) + omission;
+
+  if (!fontType)
+    fontType = fontDetect(content);
+
+  var syllables = syllBreak(content, fontType).split(/\u200B/);
+
+  return syllables.reduce(function (curr, syll) {
+    var left = absoulteLength - curr.length;
+    if (left > 0) {
+      if (syll.length <= left) {
+        curr += syll;
+      } else {
+        var spaceBreak = syll.split(/\s/);
+        
+        curr += spaceBreak.reduce(function (_curr, word) {
+          if (word.length + 1 <= left - _curr.length) {
+            _curr += word + ' ';
+          }
+          return _curr;
+        }, '')
+      }
+    }
+    return curr;
+  }, '').trim() + omission;
+}
+
+module.exports = truncate;

dist/knayi-myscript.js

@@ -1,16 +1,18 @@
-const globalOptions = require('./library/globalOptions')
-const fontDetect = require('./library/detector')
-const fontConvert = require('./library/converter')
-const syllBreak = require('./library/syllBreak')
-const spellingFix = require('./library/spellingCheck')
+const globalOptions = require('./library/globalOptions');
+const fontDetect = require('./library/detector');
+const fontConvert = require('./library/converter');
+const syllBreak = require('./library/syllBreak');
+const spellingFix = require('./library/spellingCheck');
+const truncate = require('./library/truncate');
 
-const {version} = require('./package.json')
+const {version} = require('./package.json');
 
 module.exports = {
 	version,
 	setGlobalOptions: globalOptions.setOptions,
 	fontDetect,
 	fontConvert,
 	syllBreak,
-	spellingFix
+	spellingFix,
+	truncate,
 };