| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| var iframeUpdateIntervalID; |
| |
| function selectExample(el) { |
| setIframeSrc(el.dataset.href); |
| deselectAllNavItems(); |
| selectNavItem(el); |
| } |
| |
| function selectNavItem(el) { |
| el.classList.add('selected'); |
| } |
| |
| function deselectAllNavItems() { |
| var navItemEls = document.querySelectorAll('.nav-item'); |
| for (var i = 0; i < navItemEls.length; ++i) { |
| navItemEls[i].classList.remove('selected'); |
| } |
| } |
| |
| function setIframeSrc(src) { |
| var iframeEl = document.querySelector('iframe'); |
| |
| window.clearInterval(iframeUpdateIntervalID); |
| iframeEl.style.height = ''; |
| iframeEl.src = src; |
| } |
| |
| document.addEventListener('DOMContentLoaded', function () { |
| var iframeEl = document.querySelector('iframe'); |
| var iframeWrapperEl = document.querySelector('.iframe-wrapper'); |
| var navItemEls = document.querySelectorAll('.nav-item'); |
| |
| for (var i = 0; i < navItemEls.length; ++i) { |
| navItemEls[i].addEventListener('click', function (e) { |
| selectExample(this); |
| }); |
| } |
| |
| iframeEl.addEventListener('load', function () { |
| var iframeDocument = this.contentWindow.document; |
| var iframeBodyEl = iframeDocument.body; |
| iframeEl.style.height = iframeBodyEl.scrollHeight + 'px'; |
| |
| // HACK: polling the body height to update the iframe. There's got to be a |
| // better way to do this... |
| var prevBodyHeight; |
| var prevWrapperHeight; |
| iframeUpdateIntervalID = window.setInterval(function () { |
| var bodyHeight = iframeBodyEl.getBoundingClientRect().height; |
| var wrapperHeight = iframeWrapperEl.clientHeight; |
| if (bodyHeight != prevBodyHeight || wrapperHeight != prevWrapperHeight) { |
| // HACK: magic 4... without it, the scrollbar is always visible. :( |
| var newHeight = Math.max(wrapperHeight - 4, bodyHeight); |
| iframeEl.style.height = newHeight + 'px'; |
| prevBodyHeight = bodyHeight; |
| prevWrapperHeight = wrapperHeight; |
| } |
| }, 100); // .1s |
| }, false); |
| |
| var closeButtonEl = document.querySelector('.close-button'); |
| closeButtonEl.addEventListener('click', function () { |
| window.close(); |
| }); |
| |
| // select the first example. |
| selectExample(document.querySelector('.nav-item')); |
| }); |