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rustdoc: clean up JS

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* Stop checking `func` in `onEach`. It's always hard-coded right
  at the call site, so there's no point.
* Use the ternary operator in a few spots where it makes sense.
* No point in making `onEach` store `arr.length` in a variable if
  it's only used once anyway.
This commit is contained in:
Michael Howell 2023-04-06 14:53:29 -07:00
parent de74dab880
commit 815f5bbcc5
3 changed files with 9 additions and 28 deletions
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10
src/librustdoc/html/static/js/main.js
View File

@ -332,13 +332,7 @@ function preLoadCss(cssUrl) {
};
function getPageId() {
if (window.location.hash) {
const tmp = window.location.hash.replace(/^#/, "");
if (tmp.length > 0) {
return tmp;
}
}
return null;
return window.location.hash.replace(/^#/, "");
}
const toggleAllDocsId = "toggle-all-docs";
@ -707,7 +701,7 @@ function preLoadCss(cssUrl) {
});
const pageId = getPageId();
if (pageId !== null) {
if (pageId !== "") {
expandSection(pageId);
}
}());

8
src/librustdoc/html/static/js/settings.js
View File

@ -86,12 +86,8 @@
if (settingId === "theme") {
const useSystem = getSettingValue("use-system-theme");
if (useSystem === "true" || settingValue === null) {
if (useSystem !== "false") {
settingValue = "system preference";
} else {
// This is the default theme.
settingValue = "light";
}
// "light" is the default theme
settingValue = useSystem === "false" ? "light" : "system preference";
}
}
if (settingValue !== null && settingValue !== "null") {

19
src/librustdoc/html/static/js/storage.js
View File

@ -53,10 +53,9 @@ function removeClass(elem, className) {
* @param {boolean} [reversed] - Whether to iterate in reverse
*/
function onEach(arr, func, reversed) {
if (arr && arr.length > 0 && func) {
if (arr && arr.length > 0) {
if (reversed) {
const length = arr.length;
for (let i = length - 1; i >= 0; --i) {
for (let i = arr.length - 1; i >= 0; --i) {
if (func(arr[i])) {
return true;
}
@ -150,26 +149,18 @@ const updateTheme = (function() {
* … dictates that it should be.
*/
function updateTheme() {
const use = (theme, saveTheme) => {
switchTheme(theme, saveTheme);
};
// maybe the user has disabled the setting in the meantime!
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, true);
} else {
// prefers a light theme, or has no preference
use(lightTheme, true);
}
// use light theme if user prefers it, or has no preference
switchTheme(mql.matches ? darkTheme : lightTheme, true);
// note: we save the theme so that it doesn't suddenly change when
// the user disables "use-system-theme" and reloads the page or
// navigates to another page
} else {
use(getSettingValue("theme"), false);
switchTheme(getSettingValue("theme"), false);
}
}