Index: sky/examples/city-list/city-sequence.sky |
diff --git a/sky/examples/city-list/city-sequence.sky b/sky/examples/city-list/city-sequence.sky |
new file mode 100644 |
index 0000000000000000000000000000000000000000..2e82825a39ea6d1346b8aedcd0b132a62ed87f05 |
--- /dev/null |
+++ b/sky/examples/city-list/city-sequence.sky |
@@ -0,0 +1,64 @@ |
+<!-- |
+// Copyright 2014 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+--> |
+<script> |
+function StateHeader(state) { |
+ this.state = state; |
+ this.headerOrder = 1; |
+}; |
+ |
+function LetterHeader(letter) { |
+ this.letter = letter; |
+ this.headerOrder = 2; |
+} |
+ |
+function CitySequence(cities) |
+{ |
+ this.items = []; |
+ this.cursor = 0; |
+ |
+ var lastState; |
+ var lastLetter; |
+ |
+ for (var i = 0; i < cities.length; i++) { |
+ var city = cities[i]; |
+ if (!lastState || lastState.state != city.state) { |
+ lastState = new StateHeader(city.state); |
+ this.items.push(lastState); |
+ lastLetter = undefined; |
+ } |
+ if (!lastLetter || lastLetter.letter != city.name[0]) { |
+ lastLetter = new LetterHeader(city.name[0]); |
+ this.items.push(lastLetter); |
+ } |
+ this.items.push(city); |
+ } |
+}; |
+ |
+CitySequence.prototype = { |
+ append: function(other) { |
+ var lastCity = this.items[this.items.length - 1]; |
+ var firstOtherCity = other.items[2]; |
+ |
+ var index = 0; |
+ if (firstOtherCity.state == lastCity.state) { |
+ // skip StateHeader |
+ if (firstOtherCity.name[0] == lastCity.name[0]) { |
+ // skip LetterHeader |
+ index = 2; |
+ } else { |
+ index = 1; |
+ } |
+ } |
+ |
+ for (; index < other.items.length; index++) { |
+ this.items.push(other.items[index]); |
+ } |
+ } |
+}; |
+ |
+module.exports = CitySequence; |
+ |
+</script> |