71 lines
2 KiB
JavaScript
71 lines
2 KiB
JavaScript
var resourcesSuffix = "";
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/*!
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* Copyright 2018 The Rust Project Developers. See the COPYRIGHT
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* file at the top-level directory of this distribution and at
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* http://rust-lang.org/COPYRIGHT.
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*
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* Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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* http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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* <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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* option. This file may not be copied, modified, or distributed
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* except according to those terms.
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*/
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var currentTheme = document.getElementById("themeStyle");
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var mainTheme = document.getElementById("mainThemeStyle");
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var savedHref = [];
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function onEach(arr, func) {
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if (arr && arr.length > 0 && func) {
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for (var i = 0; i < arr.length; i++) {
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if (func(arr[i]) === true) {
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break;
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}
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}
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}
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}
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function updateLocalStorage(name, value) {
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if (typeof(Storage) !== "undefined") {
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localStorage[name] = value;
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} else {
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// No Web Storage support so we do nothing
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}
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}
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function getCurrentValue(name) {
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if (typeof(Storage) !== "undefined" && localStorage[name] !== undefined) {
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return localStorage[name];
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}
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return null;
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}
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function switchTheme(styleElem, mainStyleElem, newTheme) {
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var fullBasicCss = "rustdoc" + resourcesSuffix + ".css";
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var fullNewTheme = newTheme + resourcesSuffix + ".css";
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var newHref = mainStyleElem.href.replace(fullBasicCss, fullNewTheme);
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if (styleElem.href === newHref) {
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return;
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}
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var found = false;
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if (savedHref.length === 0) {
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onEach(document.getElementsByTagName("link"), function(el) {
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savedHref.push(el.href);
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});
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}
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onEach(savedHref, function(el) {
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if (el === newHref) {
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found = true;
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return true;
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}
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});
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if (found === true) {
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styleElem.href = newHref;
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updateLocalStorage('rustdoc-theme', newTheme);
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}
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}
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switchTheme(currentTheme, mainTheme, getCurrentValue('rustdoc-theme') || 'light');
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