inner-truncate

components.fui-truncate.js

import Ember from 'ember'
import hbs from 'htmlbars-inline-precompile'

export default Ember.Component.extend({
  suffixLength: 4,
  text: null,
  
  prefix: Ember.computed('suffixLength', 'text', function() {
    const suffixLength = this.get('suffixLength')
    const text = this.get('text') || ''
    return suffixLength <= 0 ? text : text.slice(0, -1 * suffixLength)
  }),
  
  suffix: Ember.computed('suffixLength', 'text', function() {
    const suffixLength = this.get('suffixLength')
    const text = this.get('text') || ''
    return suffixLength <= 0 ? '' : text.slice(-1 * suffixLength)
  }),
  
  attributeBindings: [ 'text:title' ],
  classNames: [ 'inner-truncate' ],
  
  // This component is sensitive to whitespace, so we write
  // the template all on one line:
  layout: hbs`<span class='inner-truncate__prefix'>{{prefix}}</span><span class='inner-truncate__suffix'>{{suffix}}</span>`
}).reopenClass({
  positionalParams: [ 'text' ]
})

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.grid {
  display: grid;
  grid-column-gap: 1em;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
}

.inner-truncate {
  display: inline-flex;
  flex-wrap: nowrap;
  overflow-x: hidden;
}

.inner-truncate__prefix {
  flex: 1;
  overflow-x: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.inner-truncate__suffix {
  flex-basis: auto;
  flex-grow: 0;
  flex-shrink: 0;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<div class='grid'>
  {{fui-truncate 'We finished our first sensor sweep of the neutral zone.'}}
  {{fui-truncate 'A surprise party? Mr. Worf, I hate surprise parties.' suffixLength=2}}
  {{fui-truncate 'But the probability of making a six is no greater than that of rolling a seven.' suffixLength=0}}
</div>
<br>
<br>

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}