86 lines
2.8 KiB
JavaScript
86 lines
2.8 KiB
JavaScript
var IV = {
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sendPostMessage: function(data) {
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try {
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window.parent.postMessage(JSON.stringify(data), window.parentOrigin);
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} catch(e) {}
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},
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frameClickHandler: function(e) {
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var target = e.target, href;
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do {
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if (target.tagName == 'SUMMARY') return;
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if (target.tagName == 'DETAILS') return;
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if (target.tagName == 'LABEL') return;
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if (target.tagName == 'AUDIO') return;
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if (target.tagName == 'A') break;
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} while (target = target.parentNode);
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if (target && target.hasAttribute('href')) {
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var base_loc = document.createElement('A');
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base_loc.href = window.currentUrl;
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if (base_loc.origin != target.origin ||
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base_loc.pathname != target.pathname ||
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base_loc.search != target.search) {
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IV.sendPostMessage({event: 'link_click', url: target.href});
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}
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}
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e.preventDefault();
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},
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postMessageHandler: function(event) {
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if (event.source !== window.parent ||
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event.origin != window.parentOrigin) {
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return;
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}
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try {
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var data = JSON.parse(event.data);
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} catch(e) {
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var data = {};
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}
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},
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slideshowSlide: function(el, next) {
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var dir = window.getComputedStyle(el, null).direction || 'ltr';
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var marginProp = dir == 'rtl' ? 'marginRight' : 'marginLeft';
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if (next) {
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var s = el.previousSibling.s;
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s.value = (+s.value + 1 == s.length) ? 0 : +s.value + 1;
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s.forEach(function(el){ el.checked && el.parentNode.scrollIntoView && el.parentNode.scrollIntoView({behavior: 'smooth', block: 'center', inline: 'center'}); });
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el.firstChild.style[marginProp] = (-100 * s.value) + '%';
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} else {
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el.form.nextSibling.firstChild.style[marginProp] = (-100 * el.value) + '%';
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}
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return false;
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},
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initPreBlocks: function() {
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if (!hljs) return;
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var pres = document.getElementsByTagName('pre');
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for (var i = 0; i < pres.length; i++) {
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if (pres[i].hasAttribute('data-language')) {
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hljs.highlightBlock(pres[i]);
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}
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}
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},
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initEmbedBlocks: function() {
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var iframes = document.getElementsByTagName('iframe');
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for (var i = 0; i < iframes.length; i++) {
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(function(iframe) {
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window.addEventListener('message', function(event) {
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if (event.source !== iframe.contentWindow ||
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event.origin != window.origin) {
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return;
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}
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try {
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var data = JSON.parse(event.data);
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} catch(e) {
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var data = {};
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}
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if (data.eventType == 'resize_frame') {
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if (data.eventData.height) {
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iframe.style.height = data.eventData.height + 'px';
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}
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}
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}, false);
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})(iframes[i]);
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}
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}
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};
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document.onclick = IV.frameClickHandler;
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window.onmessage = IV.postMessageHandler;
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