| // |
| // Simple Helper Functions For Testing CSS |
| // |
| |
| (function(root) { |
| 'use strict'; |
| |
| // serialize styles object and dump to dom |
| // appends <style id="dynamic-style"> to <head> |
| // setStyle("#some-selector", {"some-style" : "value"}) |
| // setStyle({"#some-selector": {"some-style" : "value"}}) |
| root.setStyle = function(selector, styles) { |
| var target = document.getElementById('dynamic-style'); |
| if (!target) { |
| target = document.createElement('style'); |
| target.id = 'dynamic-style'; |
| target.type = "text/css"; |
| document.getElementsByTagName('head')[0].appendChild(target); |
| } |
| |
| var data = []; |
| // single selector/styles |
| if (typeof selector === 'string' && styles !== undefined) { |
| data = [selector, '{', serializeStyles(styles), '}']; |
| target.textContent = data.join("\n"); |
| return; |
| } |
| // map of selector/styles |
| for (var key in selector) { |
| if (Object.prototype.hasOwnProperty.call(selector, key)) { |
| var _data = [key, '{', serializeStyles(selector[key]), '}']; |
| data.push(_data.join('\n')); |
| } |
| } |
| |
| target.textContent = data.join("\n"); |
| }; |
| |
| function serializeStyles(styles) { |
| var data = []; |
| for (var property in styles) { |
| if (Object.prototype.hasOwnProperty.call(styles, property)) { |
| var prefixedProperty = addVendorPrefix(property); |
| data.push(prefixedProperty + ":" + styles[property] + ";"); |
| } |
| } |
| |
| return data.join('\n'); |
| } |
| |
| |
| // shorthand for computed style |
| root.computedStyle = function(element, property, pseudo) { |
| var prefixedProperty = addVendorPrefix(property); |
| return window |
| .getComputedStyle(element, pseudo || null) |
| .getPropertyValue(prefixedProperty); |
| }; |
| |
| // flush rendering buffer |
| root.reflow = function() { |
| document.body.offsetWidth; |
| }; |
| |
| // merge objects |
| root.extend = function(target /*, ..rest */) { |
| Array.prototype.slice.call(arguments, 1).forEach(function(obj) { |
| Object.keys(obj).forEach(function(key) { |
| target[key] = obj[key]; |
| }); |
| }); |
| |
| return target; |
| }; |
| |
| // dom fixture helper ("resetting dom test elements") |
| var _domFixture; |
| var _domFixtureSelector; |
| root.domFixture = function(selector) { |
| var fixture = document.querySelector(selector || _domFixtureSelector); |
| if (!fixture) { |
| throw new Error('fixture ' + (selector || _domFixtureSelector) + ' not found!'); |
| } |
| if (!_domFixture && selector) { |
| // save a copy |
| _domFixture = fixture.cloneNode(true); |
| _domFixtureSelector = selector; |
| } else if (_domFixture) { |
| // restore the copy |
| var tmp = _domFixture.cloneNode(true); |
| fixture.parentNode.replaceChild(tmp, fixture); |
| } else { |
| throw new Error('domFixture must be initialized first!'); |
| } |
| }; |
| })(window); |
