git.iko.soy/elk
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elk/libraries/Native/Signal/Window.js
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2Elm.Native.Window = function(elm) {
3 'use strict';
5 elm.Native = elm.Native || {};
6 if (elm.Native.Window) return elm.Native.Window;
8 var Signal = Elm.Signal(elm);
9 var Tuple2 = Elm.Native.Utils(elm).Tuple2;
11 var dimensions = Signal.constant(Tuple2(elm.node.clientWidth,
12 elm.node.clientHeight));
13 dimensions.defaultNumberOfKids = 2;
15 // Do not move width and height into Elm. By setting the default number of kids,
16 // the resize listener can be detached.
17 var width = A2(Signal.lift, function(p){return p._0}, dimensions);
18 width.defaultNumberOfKids = 0;
20 var height = A2(Signal.lift, function(p){return p._1}, dimensions);
21 height.defaultNumberOfKids = 0;
23 function resize(e) {
24 var w = elm.node.clientWidth;
25 var h = document.body === elm.node ? window.innerHeight : elm.node.clientHeight;
26 console.log('cmp', dimensions.value._0, w, dimensions.value._1, h);
27 if (dimensions.value._0 === w && dimensions.value._1 === h) return;
28 var hasListener = elm.notify(dimensions.id, Tuple2(w,h));
29 if (!hasListener) window.removeEventListener('resize', resize);
30 }
31 window.addEventListener('resize', resize);
33 return elm.Native.Window = {
34 dimensions:dimensions,
35 width:width,
36 height:height
37 };
39};