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33 lines
1.2 KiB
33 lines
1.2 KiB
"use strict"; |
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var isValue = require("type/value/is") |
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, ensureValue = require("type/value/ensure") |
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, ensurePlainFunction = require("type/plain-function/ensure") |
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, copy = require("es5-ext/object/copy") |
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, normalizeOptions = require("es5-ext/object/normalize-options") |
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, map = require("es5-ext/object/map"); |
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var bind = Function.prototype.bind |
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, defineProperty = Object.defineProperty |
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, hasOwnProperty = Object.prototype.hasOwnProperty |
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, define; |
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define = function (name, desc, options) { |
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var value = ensureValue(desc) && ensurePlainFunction(desc.value), dgs; |
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dgs = copy(desc); |
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delete dgs.writable; |
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delete dgs.value; |
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dgs.get = function () { |
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if (!options.overwriteDefinition && hasOwnProperty.call(this, name)) return value; |
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desc.value = bind.call(value, options.resolveContext ? options.resolveContext(this) : this); |
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defineProperty(this, name, desc); |
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return this[name]; |
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}; |
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return dgs; |
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}; |
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module.exports = function (props/*, options*/) { |
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var options = normalizeOptions(arguments[1]); |
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if (isValue(options.resolveContext)) ensurePlainFunction(options.resolveContext); |
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return map(props, function (desc, name) { return define(name, desc, options); }); |
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};
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