101 lines
3.7 KiB
JavaScript
101 lines
3.7 KiB
JavaScript
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Elm.Native.Show = function(elm) {
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'use strict';
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elm.Native = elm.Native || {};
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if (elm.Native.Show) return elm.Native.Show;
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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 JS = Elm.JavaScript(elm);
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var Dict = Elm.Dict(elm);
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var Json = Elm.Json(elm);
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var Tuple2 = Elm.Native.Utils(elm).Tuple2;
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var toString = function(v) {
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var type = typeof v;
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if (type === "function") {
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var name = v.func ? v.func.name : v.name;
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return '<function' + (name === '' ? '' : ': ') + name + '>';
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} else if (type === "boolean") {
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return v ? "True" : "False";
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} else if (type === "number") {
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return v+"";
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} else if (type === "string" && v.length < 2) {
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return "'" + showChar(v) + "'";
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} else if (type === "object" && '_' in v) {
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var output = [];
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for (var k in v._) {
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for (var i = v._[k].length; i--; ) {
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output.push(k + " = " + toString(v._[k][i]));
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}
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}
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for (var k in v) {
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if (k === '_') continue;
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output.push(k + " = " + toString(v[k]));
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}
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if (output.length === 0) return "{}";
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return "{ " + output.join(", ") + " }";
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} else if (type === "object" && 'ctor' in v) {
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if (v.ctor.substring(0,6) === "_Tuple") {
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var output = [];
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for (var k in v) {
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if (k === 'ctor') continue;
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output.push(toString(v[k]));
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}
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return "(" + output.join(",") + ")";
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} else if (v.ctor === "::") {
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var isStr = typeof v._0 === "string",
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start = isStr ? '"' : "[",
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end = isStr ? '"' : "]",
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sep = isStr ? "" : ",",
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f = !isStr ? toString : showChar;
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var output = start + f(v._0);
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v = v._1;
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while (v.ctor === "::") {
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output += sep + f(v._0);
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v = v._1;
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}
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return output + end;
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} else if (v.ctor === "[]") {
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return "[]";
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} else if (v.ctor === "RBNode" || v.ctor === "RBEmpty") {
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var cons = F3(function(k,v,acc){return NList.Cons(Tuple2(k,v),acc)});
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var list = A3(Dict.foldr, cons, NList.Nil, v);
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var name = "Dict";
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if (list.ctor === "::" && list._0._1.ctor === "_Tuple0") {
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name = "Set";
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list = A2(List.map, function(x){return x._0}, list);
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}
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return name + ".fromList " + toString(list);
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} else {
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var output = "";
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for (var i in v) {
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if (i === 'ctor') continue;
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var str = toString(v[i]);
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var parenless = str[0] === '{' || str[0] === '<' || str.indexOf(' ') < 0;
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output += ' ' + (parenless ? str : '(' + str + ')');
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}
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return v.ctor + output;
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}
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}
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if (type === 'object' && 'recv' in v) return '<signal>';
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return "<internal structure>";
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};
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function show(v) { return NList.fromArray(toString(v)); }
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function showChar (c) {
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return c === '\n' ? '\\n' :
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c === '\t' ? '\\t' :
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c === '\b' ? '\\b' :
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c === '\r' ? '\\r' :
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c === '\v' ? '\\v' :
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c === '\0' ? '\\0' :
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c === '\'' ? "\\'" :
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c === '\"' ? '\\"' :
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c === '\\' ? '\\\\' : c;
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}
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return elm.Native.Show = { show:show };
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};
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