46 lines
No EOL
1.5 KiB
JavaScript
46 lines
No EOL
1.5 KiB
JavaScript
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Elm.Native.Keyboard.Raw = function(elm) {
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'use strict';
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var Signal = Elm.Signal(elm);
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var NList = Elm.Native.List(elm);
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var List = Elm.List(elm);
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var Maybe = Elm.Maybe(elm);
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var keysDown = Signal.constant(NList.Nil);
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var charPressed = Signal.constant(Maybe.Nothing);
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function down(e) {
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if (List.member(e.keyCode)(keysDown.value)) return;
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var list = NList.Cons(e.keyCode, keysDown.value);
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var hasListener = elm.notify(keysDown.id, list);
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if (!hasListener) elm.node.removeEventListener('keydown', down);
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}
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function up(e) {
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function notEq(kc) { return kc !== e.keyCode; }
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var codes = List.filter(notEq)(keysDown.value);
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var hasListener = elm.notify(keysDown.id, codes);
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if (!hasListener) elm.node.removeEventListener('keyup', up);
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}
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function blur(e) {
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var hasListener = elm.notify(keysDown.id, NList.Nil);
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if (!hasListener) elm.node.removeEventListener('blur', blur);
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}
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function press(e) {
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var next = Maybe.Just(e.charCode || e.keyCode);
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var hasListener = elm.notify(charPressed.id, next);
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elm.notify(charPressed.id, Maybe.Nothing);
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if (!hasListener) elm.node.removeEventListener('keypress', press);
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}
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elm.node.addEventListener('keydown' , down );
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elm.node.addEventListener('keyup' , up );
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elm.node.addEventListener('blur' , blur );
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elm.node.addEventListener('keypress', press);
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return elm.Native.Keyboard.Raw = {
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keysDown:keysDown,
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charPressed:charPressed
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};
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}; |