OLD | NEW |
(Empty) | |
| 1 <!-- |
| 2 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 3 // Use of this source code is governed by a BSD-style license that can be |
| 4 // found in the LICENSE file. |
| 5 --> |
| 6 <script> |
| 7 function StateHeader(state) { |
| 8 this.state = state; |
| 9 this.headerOrder = 1; |
| 10 }; |
| 11 |
| 12 function LetterHeader(letter) { |
| 13 this.letter = letter; |
| 14 this.headerOrder = 2; |
| 15 } |
| 16 |
| 17 function CitySequence(cities) |
| 18 { |
| 19 this.items = []; |
| 20 this.cursor = 0; |
| 21 |
| 22 var lastState; |
| 23 var lastLetter; |
| 24 |
| 25 for (var i = 0; i < cities.length; i++) { |
| 26 var city = cities[i]; |
| 27 if (!lastState || lastState.state != city.state) { |
| 28 lastState = new StateHeader(city.state); |
| 29 this.items.push(lastState); |
| 30 lastLetter = undefined; |
| 31 } |
| 32 if (!lastLetter || lastLetter.letter != city.name[0]) { |
| 33 lastLetter = new LetterHeader(city.name[0]); |
| 34 this.items.push(lastLetter); |
| 35 } |
| 36 this.items.push(city); |
| 37 } |
| 38 }; |
| 39 |
| 40 CitySequence.prototype = { |
| 41 append: function(other) { |
| 42 var lastCity = this.items[this.items.length - 1]; |
| 43 var firstOtherCity = other.items[2]; |
| 44 |
| 45 var index = 0; |
| 46 if (firstOtherCity.state == lastCity.state) { |
| 47 // skip StateHeader |
| 48 if (firstOtherCity.name[0] == lastCity.name[0]) { |
| 49 // skip LetterHeader |
| 50 index = 2; |
| 51 } else { |
| 52 index = 1; |
| 53 } |
| 54 } |
| 55 |
| 56 for (; index < other.items.length; index++) { |
| 57 this.items.push(other.items[index]); |
| 58 } |
| 59 } |
| 60 }; |
| 61 |
| 62 module.exports = CitySequence; |
| 63 |
| 64 </script> |
OLD | NEW |