55 lines
5.5 KiB
JavaScript

// Populate the sidebar
//
// This is a script, and not included directly in the page, to control the total size of the book.
// The TOC contains an entry for each page, so if each page includes a copy of the TOC,
// the total size of the page becomes O(n**2).
var sidebarScrollbox = document.querySelector("#sidebar .sidebar-scrollbox");
sidebarScrollbox.innerHTML = '<ol class="chapter"><li class="chapter-item expanded affix "><a href="introduction.html">Introduction</a></li><li class="chapter-item expanded affix "><a href="supported-platforms.html">Supported Platforms</a></li><li class="chapter-item expanded affix "><a href="developer-log.html">Developer Log</a></li><li class="chapter-item expanded "><a href="user-guide/index.html"><strong aria-hidden="true">1.</strong> User Guide</a></li><li class="chapter-item expanded "><a href="development-guide/index.html"><strong aria-hidden="true">2.</strong> Development Guide</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="development-guide/how-to-run.html"><strong aria-hidden="true">2.1.</strong> How to Run Demos</a></li><li class="chapter-item expanded "><a href="development-guide/building-libraries.html"><strong aria-hidden="true">2.2.</strong> Building Libraries</a></li><li class="chapter-item expanded "><a href="development-guide/debugging.html"><strong aria-hidden="true">2.3.</strong> Debugging</a></li></ol></li><li class="chapter-item expanded "><a href="development-documents/index.html"><strong aria-hidden="true">3.</strong> Development Documents</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="development-documents/architecture.html"><strong aria-hidden="true">3.1.</strong> Architecture</a></li><li class="chapter-item expanded "><a href="development-documents/design.html"><strong aria-hidden="true">3.2.</strong> Design</a></li><li class="chapter-item expanded "><a href="development-documents/caching.html"><strong aria-hidden="true">3.3.</strong> Caching</a></li><li class="chapter-item expanded "><a href="development-documents/stencil-masking.html"><strong aria-hidden="true">3.4.</strong> Stencil Masking</a></li><li class="chapter-item expanded "><a href="development-documents/font-rendering.html"><strong aria-hidden="true">3.5.</strong> Font Rendering</a></li><li class="chapter-item expanded "><a href="development-documents/library-packaging.html"><strong aria-hidden="true">3.6.</strong> Library Packaging</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="development-documents/library-packaging/apple.html"><strong aria-hidden="true">3.6.1.</strong> Apple</a></li><li class="chapter-item expanded "><a href="development-documents/library-packaging/android.html"><strong aria-hidden="true">3.6.2.</strong> Android</a></li><li class="chapter-item expanded "><a href="development-documents/library-packaging/web.html"><strong aria-hidden="true">3.6.3.</strong> Web</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="appendix/index.html"><strong aria-hidden="true">4.</strong> Appendix</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="appendix/link-collection.html"><strong aria-hidden="true">4.1.</strong> Link Collection</a></li></ol></li><li class="chapter-item expanded "><a href="rfc/0001-rfc-process.html"><strong aria-hidden="true">5.</strong> RFCs</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="rfc/0000-template.html"><strong aria-hidden="true">5.1.</strong> 0000-template</a></li><li class="chapter-item expanded "><a href="rfc/0001-rfc-process.html"><strong aria-hidden="true">5.2.</strong> 0001-rfc-process</a></li></ol></li></ol>';
(function() {
let current_page = document.location.href.toString();
if (current_page.endsWith("/")) {
current_page += "index.html";
}
var links = sidebarScrollbox.querySelectorAll("a");
var l = links.length;
for (var i = 0; i < l; ++i) {
var link = links[i];
var href = link.getAttribute("href");
if (href && !href.startsWith("#") && !/^(?:[a-z+]+:)?\/\//.test(href)) {
link.href = path_to_root + href;
}
// The "index" page is supposed to alias the first chapter in the book.
if (link.href === current_page || (i === 0 && path_to_root === "" && current_page.endsWith("/index.html"))) {
link.classList.add("active");
var parent = link.parentElement;
while (parent) {
if (parent.tagName === "LI" && parent.previousElementSibling) {
if (parent.previousElementSibling.classList.contains("chapter-item")) {
parent.previousElementSibling.classList.add("expanded");
}
}
parent = parent.parentElement;
}
}
}
})();
// Track and set sidebar scroll position
sidebarScrollbox.addEventListener('click', function(e) {
if (e.target.tagName === 'A') {
sessionStorage.setItem('sidebar-scroll', sidebarScrollbox.scrollTop);
}
}, { passive: true });
var sidebarScrollTop = sessionStorage.getItem('sidebar-scroll');
sessionStorage.removeItem('sidebar-scroll');
if (sidebarScrollTop) {
// preserve sidebar scroll position when navigating via links within sidebar
sidebarScrollbox.scrollTop = sidebarScrollTop;
} else {
// scroll sidebar to current active section when navigating via "next/previous chapter" buttons
var activeSection = document.querySelector('#sidebar .active');
if (activeSection) {
activeSection.scrollIntoView({ block: 'center' });
}
}