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Rollup merge of #79986 - GuillaumeGomez:build-help-when-needed, r=Nemo157

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Only build help popup when it's really needed

When working on https://github.com/rust-lang/rust/pull/79985, I realized that the help popup was built even when it wasn't needed. This PR only makes the help popup to be built when required.

r? `@jyn514`
This commit is contained in:
Dylan DPC 2021-03-19 23:01:29 +01:00 committed by GitHub
commit ae1a2df255
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1 changed files with 20 additions and 12 deletions
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32
src/librustdoc/html/static/main.js
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@ -1,3 +1,4 @@
// ignore-tidy-filelength
// Local js definitions:
/* global addClass, getSettingValue, hasClass */
/* global onEach, onEachLazy, hasOwnProperty, removeClass, updateLocalStorage */
@ -374,28 +375,35 @@ function defocusSearchBar() {
}
}
function getHelpElement() {
buildHelperPopup();
function getHelpElement(build) {
if (build !== false) {
buildHelperPopup();
}
return document.getElementById("help");
}
function displayHelp(display, ev, help) {
help = help ? help : getHelpElement();
if (display === true) {
help = help ? help : getHelpElement(true);
if (hasClass(help, "hidden")) {
ev.preventDefault();
removeClass(help, "hidden");
addClass(document.body, "blur");
}
} else if (hasClass(help, "hidden") === false) {
ev.preventDefault();
addClass(help, "hidden");
removeClass(document.body, "blur");
} else {
// No need to build the help popup if we want to hide it in case it hasn't been
// built yet...
help = help ? help : getHelpElement(false);
if (help && hasClass(help, "hidden") === false) {
ev.preventDefault();
addClass(help, "hidden");
removeClass(document.body, "blur");
}
}
}
function handleEscape(ev) {
var help = getHelpElement();
var help = getHelpElement(false);
var search = getSearchElement();
if (hasClass(help, "hidden") === false) {
displayHelp(false, ev, help);
@ -558,6 +566,7 @@ function defocusSearchBar() {
}());
document.addEventListener("click", function(ev) {
var helpElem = getHelpElement(false);
if (hasClass(ev.target, "help-button")) {
displayHelp(true, ev);
} else if (hasClass(ev.target, "collapse-toggle")) {
@ -566,11 +575,10 @@ function defocusSearchBar() {
collapseDocs(ev.target.parentNode, "toggle");
} else if (ev.target.tagName === "SPAN" && hasClass(ev.target.parentNode, "line-numbers")) {
handleSourceHighlight(ev);
} else if (hasClass(getHelpElement(), "hidden") === false) {
var help = getHelpElement();
var is_inside_help_popup = ev.target !== help && help.contains(ev.target);
} else if (helpElem && hasClass(helpElem, "hidden") === false) {
var is_inside_help_popup = ev.target !== helpElem && helpElem.contains(ev.target);
if (is_inside_help_popup === false) {
addClass(help, "hidden");
addClass(helpElem, "hidden");
removeClass(document.body, "blur");
}
} else {