85 lines
2.2 KiB
JavaScript
85 lines
2.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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/**
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* Store of CSSStyleDeclarations mapped to properties that have been changed by
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* the user.
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*/
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class UserProperties {
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constructor() {
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this.map = new Map();
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}
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/**
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* Get a named property for a given CSSStyleDeclaration.
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*
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* @param {CSSStyleDeclaration} style
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* The CSSStyleDeclaration against which the property is mapped.
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* @param {String} name
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* The name of the property to get.
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* @param {String} value
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* Default value.
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* @return {String}
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* The property value if it has previously been set by the user, null
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* otherwise.
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*/
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getProperty(style, name, value) {
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const key = this.getKey(style);
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const entry = this.map.get(key, null);
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if (entry && name in entry) {
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return entry[name];
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}
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return value;
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}
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/**
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* Set a named property for a given CSSStyleDeclaration.
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*
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* @param {CSSStyleDeclaration} style
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* The CSSStyleDeclaration against which the property is to be mapped.
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* @param {String} name
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* The name of the property to set.
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* @param {String} userValue
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* The value of the property to set.
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*/
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setProperty(style, name, userValue) {
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const key = this.getKey(style, name);
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const entry = this.map.get(key, null);
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if (entry) {
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entry[name] = userValue;
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} else {
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const props = {};
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props[name] = userValue;
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this.map.set(key, props);
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}
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}
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/**
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* Check whether a named property for a given CSSStyleDeclaration is stored.
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*
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* @param {CSSStyleDeclaration} style
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* The CSSStyleDeclaration against which the property would be mapped.
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* @param {String} name
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* The name of the property to check.
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*/
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contains(style, name) {
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const key = this.getKey(style, name);
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const entry = this.map.get(key, null);
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return !!entry && name in entry;
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}
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getKey(style, name) {
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return style.actorID + ":" + name;
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}
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clear() {
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this.map.clear();
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}
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}
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module.exports = UserProperties;
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