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define([
"jQuery",
"lodash",
"core/state"
], function($, _, state) {
var index = null;
// Use a specific idnex
var useIndex = function(data) {
index = data;
};
// Load complete index
var loadIndex = function() {
return $.getJSON(state.basePath+"/glossary_index.json")
.then(useIndex);
};
// Get index and return a promise
var getIndex = function() {
var d = $.Deferred();
if (index) {
d.resolve(index);
} else {
loadIndex().done(function(){
d.resolve(index);
}).fail(d.reject);
}
return d.promise();
}
var pregQuote = function( str ) {
// http://kevin.vanzonneveld.net
// + original by: booeyOH
// + improved by: Ates Goral (http://magnetiq.com)
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// + bugfixed by: Onno Marsman
// * example 1: preg_quote("$40");
// * returns 1: '\$40'
// * example 2: preg_quote("*RRRING* Hello?");
// * returns 2: '\*RRRING\* Hello\?'
// * example 3: preg_quote("\\.+*?[^]$(){}=!<>|:");
// * returns 3: '\\\.\+\*\?\[\^\]\$\(\)\{\}\=\!\<\>\|\:'
return (str+'').replace(/([\\\.\+\*\?\[\^\]\$\(\)\{\}\=\!\<\>\|\:])/g, "\\$1");
};
var init = function() {
// Bind click on glossary item
$(document).on("click", ".book-body .page-wrapper .page-inner .glossary-term", function(e) {
e.preventDefault();
location.href = state.basePath+"/GLOSSARY.html#"+$(e.currentTarget).data("glossary-term");
});
};
var matchText = function(node, regex, callback, excludeElements) {
excludeElements || (excludeElements = ['script', 'style', 'iframe', 'canvas']);
var child = node.firstChild;
if (!child) return;
do {
switch (child.nodeType) {
case 1:
if (excludeElements.indexOf(child.tagName.toLowerCase()) > -1) {
continue;
}
matchText(child, regex, callback, excludeElements);
break;
case 3:
child.data.replace(regex, function(all) {
var args = [].slice.call(arguments),
offset = args[args.length - 2],
newTextNode = child.splitText(offset);
newTextNode.data = newTextNode.data.substr(all.length);
callback.apply(window, [child].concat(args));
child = newTextNode;
});
break;
}
} while (child = child.nextSibling);
return node;
};
var replaceTerm = function($el, term) {
var r = new RegExp( "\\b(" + pregQuote(term.name.toLowerCase()) + ")\\b" , 'gi' );
matchText($el.get(0), r, function(node, match, offset) {
var span = document.createElement("span");
span.className = "glossary-term";
span.textContent = match;
span.setAttribute("data-glossary-term", term.id);
span.setAttribute("title", term.description);
node.parentNode.insertBefore(span, node.nextSibling);
});
};
var prepare = function() {
getIndex()
.done(function() {
_.each(index, _.partial(replaceTerm, $(".book-body .page-wrapper .page-inner")));
});
};
return {
init: init,
prepare: prepare
};
});
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