librepages/storage.js

"use strict";const darkThemes=["dark","ayu"];window.currentTheme=document.getElementById("themeStyle");window.mainTheme=document.getElementById("mainThemeStyle");window.RUSTDOC_MOBILE_BREAKPOINT=700;const settingsDataset=(function(){const settingsElement=document.getElementById("default-settings");if(settingsElement===null){return null}const dataset=settingsElement.dataset;if(dataset===undefined){return null}return dataset})();function getSettingValue(settingName){const current=getCurrentValue(settingName);if(current!==null){return current}if(settingsDataset!==null){const def=settingsDataset[settingName.replace(/-/g,"_")];if(def!==undefined){return def}}return null}const localStoredTheme=getSettingValue("theme");const savedHref=[];function hasClass(elem,className){return elem&&elem.classList&&elem.classList.contains(className)}function addClass(elem,className){if(!elem||!elem.classList){return}elem.classList.add(className)}function removeClass(elem,className){if(!elem||!elem.classList){return}elem.classList.remove(className)}function onEach(arr,func,reversed){if(arr&&arr.length>0&&func){if(reversed){const length=arr.length;for(let i=length-1;i>=0;--i){if(func(arr[i])){return true}}}else{for(const elem of arr){if(func(elem)){return true}}}}return false}function onEachLazy(lazyArray,func,reversed){return onEach(Array.prototype.slice.call(lazyArray),func,reversed)}function updateLocalStorage(name,value){try{window.localStorage.setItem("rustdoc-"+name,value)}catch(e){}}function getCurrentValue(name){try{return window.localStorage.getItem("rustdoc-"+name)}catch(e){return null}}function switchTheme(styleElem,mainStyleElem,newTheme,saveTheme){const newHref=mainStyleElem.href.replace(/\/rustdoc([^/]*)\.css/,"/"+newTheme+"$1"+".css");if(saveTheme){updateLocalStorage("theme",newTheme)}if(styleElem.href===newHref){return}let found=false;if(savedHref.length===0){onEachLazy(document.getElementsByTagName("link"),el=>{savedHref.push(el.href)})}onEach(savedHref,el=>{if(el===newHref){found=true;return true}});if(found){styleElem.href=newHref}}function useSystemTheme(value){if(value===undefined){value=true}updateLocalStorage("use-system-theme",value);const toggle=document.getElementById("use-system-theme");if(toggle&&toggle instanceof HTMLInputElement){toggle.checked=value}}const updateSystemTheme=(function(){if(!window.matchMedia){return()=>{const cssTheme=getComputedStyle(document.documentElement).getPropertyValue("content");switchTheme(window.currentTheme,window.mainTheme,JSON.parse(cssTheme)||"light",true)}}const mql=window.matchMedia("(prefers-color-scheme: dark)");function handlePreferenceChange(mql){const use=theme=>{switchTheme(window.currentTheme,window.mainTheme,theme,true)};if(getSettingValue("use-system-theme")!=="false"){const lightTheme=getSettingValue("preferred-light-theme")||"light";const darkTheme=getSettingValue("preferred-dark-theme")||"dark";if(mql.matches){use(darkTheme)}else{use(lightTheme)}}else{use(getSettingValue("theme"))}}mql.addListener(handlePreferenceChange);return()=>{handlePreferenceChange(mql)}})();function switchToSavedTheme(){switchTheme(window.currentTheme,window.mainTheme,getSettingValue("theme")||"light",false)}if(getSettingValue("use-system-theme")!=="false"&&window.matchMedia){if(getSettingValue("use-system-theme")===null&&getSettingValue("preferred-dark-theme")===null&&darkThemes.indexOf(localStoredTheme)>=0){updateLocalStorage("preferred-dark-theme",localStoredTheme)}updateSystemTheme()}else{switchToSavedTheme()}if(getSettingValue("source-sidebar-show")==="true"){addClass(document.documentElement,"source-sidebar-expanded")}window.addEventListener("pageshow",ev=>{if(ev.persisted){setTimeout(switchToSavedTheme,0)}})