kopia lustrzana https://github.com/snarfed/bridgy-fed
99 wiersze
3.1 KiB
JavaScript
99 wiersze
3.1 KiB
JavaScript
// detect native/existing fragmention support
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if (!('fragmention' in window.location)) (function () {
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// populate fragmention
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location.fragmention = location.fragmention || '';
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// return first element in scope containing case-sensitive text
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function getElementsByText(scope, text) {
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// iterate descendants of scope
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for (var all = scope.childNodes, index = 0, element, list = []; (element = all[index]); ++index) {
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// conditionally return element containing visible, whitespace-insensitive, case-sensitive text (a match)
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if (element.nodeType === 1 && (element.innerText || element.textContent || '').replace(/\s+/g, ' ').indexOf(text) !== -1) {
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list = list.concat(getElementsByText(element, text));
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}
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}
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// return scope (no match)
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return list.length ? list : scope;
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}
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function getAnchorableElementByName(fragment) {
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var elements = document.getElementsByName(fragment), index = -1;
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while (elements[++index] && !/^A(REA)?$/.test(elements[index].nodeName)) {}
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return elements[index];
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}
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// on dom ready or hash change
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function onHashChange() {
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// do nothing if the dom is not ready
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if (!/e/.test(document.readyState)) return;
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// set location fragmention as uri-decoded text (from href, as hash may be decoded)
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var
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id = location.href.match(/#((?:#|%23)?)(.+)/) || [0,'',''],
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node = document.getElementById(id[1]+id[2]) || getAnchorableElementByName(id[1]+id[2]),
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match = decodeURIComponent(id[2].replace(/\+/g, ' ')).split(' ');
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location.fragmention = match[0];
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location.fragmentionIndex = parseFloat(match[1]) || 0;
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// conditionally remove stashed element fragmention attribute
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if (element) {
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element.removeAttribute('fragmention');
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// DEPRECATED: trigger style in IE8
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if (element.runtimeStyle) {
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element.runtimeStyle.windows = element.runtimeStyle.windows;
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}
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}
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// if fragmention exists
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if (!node && location.fragmention) {
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var
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// get all elements containing text (or document)
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elements = getElementsByText(document, location.fragmention),
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// get total number of elements
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length = elements.length,
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// get index of element
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modulus = length && location.fragmentionIndex % length,
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index = length && modulus >= 0 ? modulus : length + modulus;
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// get element
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element = length && elements[index];
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// if element found
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if (element) {
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// scroll to element
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element.scrollIntoView();
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// set fragmention attribute
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element.setAttribute('fragmention', '');
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// DEPRECATED: trigger style in IE8
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if (element.runtimeStyle) {
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element.runtimeStyle.windows = element.runtimeStyle.windows;
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}
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}
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// otherwise clear stashed element
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else {
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element = null;
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}
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}
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}
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var
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// DEPRECATED: configure listeners
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defaultListener = 'addEventListener',
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addEventListener = defaultListener in window ? [defaultListener, ''] : ['attachEvent', 'on'],
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// set stashed element
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element;
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// add listeners
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window[addEventListener[0]](addEventListener[1] + 'hashchange', onHashChange);
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document[addEventListener[0]](addEventListener[1] + 'readystatechange', onHashChange);
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onHashChange();
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})();
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