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toc.js
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toc.js
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(function () {
elementsByClassName = function (element, className) {
if (element.getElementsByClassName) {
return element.getElementsByClassName(className);
}
var elements = element.getElementsByTagName("*"), results = [];
var regexp = new RegExp("(^|\\s)" + className + "(\\s|$)");
for (var i = 0, l = elements.length; i < l; ++i) {
if (regexp.test(elements[i].className)) {
results.push(elements[i]);
}
}
return results;
};
// Get all text nodes in order and concat them to one string.
// Leaves <code> nodes intact.
function strippedHtml(element, html) {
var html = html || [];
for (var i = 0, ii = element.childNodes.length; i < ii; i++) {
var childNode = element.childNodes[i];
if (childNode.nodeType == 3) {
html.push(childNode.nodeValue);
} else if (childNode.nodeName == "CODE") {
html.push("<code>" + strippedHtml(childNode, []) + "</code>");
} else {
strippedHtml(childNode, html);
}
}
return html.join("");
}
function createSection(section) {
var result;
for (var i = 0, ii = section.childNodes.length; i < ii; i++) {
var element = section.childNodes[i];
if (element.nodeName == "H2") {
result = {
name: strippedHtml(element),
element: element,
subs: []
};
}
if (element.nodeName == "H3") {
result.subs.push({
name: strippedHtml(element),
element: element
});
}
}
return result;
}
function createListItemForSectionItem(sectionItem, element) {
var link = document.createElement("a");
link.innerHTML = sectionItem.name;
link.href = "#" + sectionItem.element.id;
var item = document.createElement("li");
item.appendChild(link);
element.appendChild(item);
return item;
}
function writeSectionHtml(section, element) {
var item = createListItemForSectionItem(section, element);
if (section.subs.length == 0) return;
var subs = document.createElement("ul");
item.appendChild(subs);
for (var i = 0, ii = section.subs.length; i < ii; i++) {
createListItemForSectionItem(section.subs[i], subs);
}
}
var sectionElements = elementsByClassName(document, "section");
var nav = document.createElement("ul");
for (var i = 0, ii = sectionElements.length; i < ii; i++) {
var section = createSection(sectionElements[i]);
writeSectionHtml(section, nav);
}
var el = document.getElementById("doc-nav");
if (el) { el.appendChild(nav); }
}());