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Automatically expand a section even after page load #53626

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Merged
merged 3 commits into from
Aug 26, 2018
Merged

Automatically expand a section even after page load #53626

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917cdd2
Automatically expand a section even after page load
kzys Aug 23, 2018
1f441a0
Check null-able variables before using them
kzys Aug 23, 2018
2c61f3c
Expand a collapsed element on onclick
kzys Aug 25, 2018
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52 changes: 36 additions & 16 deletions src/librustdoc/html/static/main.js
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Original file line number Diff line number Diff line change
Expand Up @@ -223,7 +223,25 @@
}
}
}
highlightSourceLines(null);

function expandSection(id) {
var elem = document.getElementById(id);
if (elem && isHidden(elem)) {
var h3 = elem.parentNode.previousSibling;
if (h3 && h3.tagName !== 'H3') {
h3 = h3.previousSibling; // skip div.docblock
}

if (h3) {
var collapses = h3.getElementsByClassName("collapse-toggle");
if (collapses.length > 0) {
// The element is not visible, we need to make it appear!
collapseDocs(collapses[0], "show");
}
}
}
}

window.onhashchange = highlightSourceLines;

// Gets the human-readable string for the virtual-key code of the
Expand Down Expand Up @@ -317,6 +335,15 @@
}
}

function findParentElement(elem, tagName) {
do {
if (elem && elem.tagName === tagName) {
return elem;
}
} while (elem = elem.parentNode);
return null;
}

document.onkeypress = handleShortcut;
document.onkeydown = handleShortcut;
document.onclick = function(ev) {
Expand Down Expand Up @@ -354,6 +381,13 @@
} else if (!hasClass(document.getElementById("help"), "hidden")) {
addClass(document.getElementById("help"), "hidden");
removeClass(document.body, "blur");
} else {
// Making a collapsed element visible on onhashchange seems
// too late
var a = findParentElement(ev.target, 'A');
if (a && a.hash) {
expandSection(a.hash.replace(/^#/, ''));
}
}
};

Expand Down Expand Up @@ -2213,21 +2247,7 @@
autoCollapse(getPageId(), getCurrentValue("rustdoc-collapse") === "true");

if (window.location.hash && window.location.hash.length > 0) {
var hash = getPageId();
if (hash !== null) {
var elem = document.getElementById(hash);
if (elem && elem.offsetParent === null) {
if (elem.parentNode && elem.parentNode.previousSibling) {
var collapses = elem.parentNode
.previousSibling
.getElementsByClassName("collapse-toggle");
if (collapses.length > 0) {
// The element is not visible, we need to make it appear!
collapseDocs(collapses[0], "show");
}
}
}
}
expandSection(window.location.hash.replace(/^#/, ''));
}
}());

Expand Down