69 lines
2 KiB
JavaScript
69 lines
2 KiB
JavaScript
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Elm.JavaScript = function() {
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function castJSBoolToBool(b) { return b; }
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function castBoolToJSBool(b) { return b; }
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function castJSNumberToFloat(n) { return n; }
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function castFloatToJSNumber(n) { return n; }
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function castJSNumberToInt(n) { return ~~n; }
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function castIntToJSNumber(n) { return n; }
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function castJSElementToElement(w) {
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return function(h) {
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return function(node) {
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return ["Element",Guid.guid(),
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["EExternalHtml",node],
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w,h,1,["Nothing"],["Nothing"]];
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}
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}
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}
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function castElementToJSElement(elem) { return Render.render(elem); }
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function castJSArrayToList(arr) {
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var list = ["Nil"];
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for (var i = arr.length; i--; ) {
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list = [ "Cons", arr[i], list ];
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}
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return list;
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}
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function castListToJSArray(list) {
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var a = [];
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while (list[0] === "Cons") {
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a.push(list[1]);
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list = list[2];
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}
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return a;
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}
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var castJSStringToString = castJSArrayToList;
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function castStringToJSString(str) {
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if (typeof str === "string") return str;
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return castListToJSArray(str).join('');
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}
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function fromTuple(t) { return t.slice(1); }
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function toTuple(a) { return ["Tuple" + a.length].concat(a); }
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return {castJSBoolToBool:castJSBoolToBool,
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castBoolToJSBool:castBoolToJSBool,
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castJSNumberToFloat:castJSNumberToFloat,
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castFloatToJSNumber:castFloatToJSNumber,
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castJSNumberToInt:castJSNumberToInt,
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castIntToJSNumber:castIntToJSNumber,
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Experimental : {castJSElementToElement:castJSElementToElement,
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castElementToJSElement:castElementToJSElement},
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castJSArrayToList:castJSArrayToList,
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castListToJSArray:castListToJSArray,
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castJSStringToString:castJSStringToString,
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castStringToJSString:castStringToJSString,
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castTupleToJSTuple2:fromTuple,
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castTupleToJSTuple3:fromTuple,
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castTupleToJSTuple4:fromTuple,
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castTupleToJSTuple5:fromTuple,
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castJSTupleToTuple2:toTuple,
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castJSTupleToTuple3:toTuple,
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castJSTupleToTuple4:toTuple,
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castJSTupleToTuple5:toTuple
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};
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}();
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