68 lines
1.7 KiB
Plaintext
68 lines
1.7 KiB
Plaintext
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import Ember from 'ember';
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import extractValue from './extract-value';
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const { computed, get } = Ember;
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export default function handleDescriptor(target, key, desc, params = []) {
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return {
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enumerable: desc.enumerable,
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configurable: desc.configurable,
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writeable: desc.writeable,
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initializer: function() {
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let computedDescriptor;
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if (desc.writable) {
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var val = extractValue(desc);
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if (typeof val === 'object') {
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let value = { };
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if (val.get) { value.get = callUserSuppliedGet(params, val.get); }
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if (val.set) { value.set = callUserSuppliedSet(params, val.set); }
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computedDescriptor = value;
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} else {
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computedDescriptor = callUserSuppliedGet(params, val);
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}
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} else {
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throw new Error('ember-computed-decorators does not support using getters and setters');
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}
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return computed.apply(null, params.concat(computedDescriptor));
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}
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};
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}
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function niceAttr(attr) {
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const parts = attr.split('.');
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let i;
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for (i = 0; i < parts.length; i++) {
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if (parts[i] === '@each' ||
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parts[i] === '[]' ||
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parts[i].indexOf('{') !== -1) {
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break;
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}
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}
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return parts.slice(0, i).join('.');
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}
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function callUserSuppliedGet(params, func) {
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params = params.map(niceAttr);
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return function() {
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let paramValues = params.map(p => get(this, p));
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return func.apply(this, paramValues);
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};
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}
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function callUserSuppliedSet(params, func) {
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params = params.map(niceAttr);
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return function(key, value) {
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let paramValues = params.map(p => get(this, p));
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paramValues.unshift(value);
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return func.apply(this, paramValues);
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};
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}
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