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59 lines
2.0 KiB
JavaScript
59 lines
2.0 KiB
JavaScript
5 years ago
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'use strict';
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var assign = require('core-js/library/fn/object/assign');
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var ContextTraversal = require('power-assert-context-traversal');
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var LegacyContextTraversal = require('./legacy-context-traversal');
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var StringWriter = require('./string-writer');
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var defaultOptions = require('./default-options');
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var reduce = require('core-js/library/fn/array/reduce');
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/**
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* options.reducers [array]
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* options.renderers [array]
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* options.outputOffset [number]
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* options.lineSeparator [string]
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* options.legacy [boolean]
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*/
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function createFormatter (options) {
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var formatterConfig = assign({}, defaultOptions(), options);
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var reducers = formatterConfig.reducers || [];
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var rendererConfigs = formatterConfig.renderers;
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var len = rendererConfigs.length;
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return function (powerAssertContext) {
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var context = reduce(reducers, function (prevContext, reducer) {
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return reducer(prevContext);
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}, powerAssertContext);
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var writer = new StringWriter(formatterConfig);
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var traversal;
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if (formatterConfig.legacy) {
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traversal = new LegacyContextTraversal(context);
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traversal.setWritable(writer);
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} else {
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traversal = new ContextTraversal(context);
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}
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for (var i = 0; i < len; i += 1) {
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var RendererClass;
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var renderer;
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var config = rendererConfigs[i];
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if (typeof config === 'object') {
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RendererClass = config.ctor;
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renderer = new RendererClass(config.options);
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} else if (typeof config === 'function') {
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RendererClass = config;
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renderer = new RendererClass();
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}
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renderer.init(traversal);
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if (typeof renderer.setWritable === 'function') {
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renderer.setWritable(writer);
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}
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}
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traversal.traverse();
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writer.write('');
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return writer.toString();
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};
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}
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createFormatter.StringWriter = StringWriter;
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module.exports = createFormatter;
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