yetangitu/epub.js
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Code Issues Releases Wiki Activity

Add landmark parsing

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This commit is contained in:
Fred Chasen 2017-11-06 11:57:34 -08:00
parent c977fc10d4
commit 7596f180d8
1 changed files with 53 additions and 1 deletions
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54
src/navigation.js
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@ -7,6 +7,7 @@ import {qs, qsa, querySelectorByType, filterChildren, getParentByTagName} from "
class Navigation {
constructor(xml) {
this.toc = [];
this.landmarks = [];
this.tocByHref = {};
this.tocById = {};
this.length = 0;
@ -33,6 +34,7 @@ class Navigation {
this.toc = this.load(xml);
} else if(html) {
this.toc = this.parseNav(xml);
this.landmarks = this.parseLandmarks(xml);
} else if(ncx){
this.toc = this.parseNcx(xml);
}
@ -92,7 +94,7 @@ class Navigation {
}
/**
* Parse from a Epub > 3.0 Nav
* Parse toc from a Epub > 3.0 Nav
* @private
* @param {document} navHtml
* @return {array} navigation list
@ -164,6 +166,56 @@ class Navigation {
};
}
/**
* Parse landmarks from a Epub > 3.0 Nav
* @private
* @param {document} navHtml
* @return {array} landmarks list
*/
parseLandmarks(navHtml){
var navElement = querySelectorByType(navHtml, "nav", "landmarks");
var navItems = navElement ? qsa(navElement, "li") : [];
var length = navItems.length;
var i;
var list = [];
var item;
if(!navItems || length === 0) return list;
for (i = 0; i < length; ++i) {
item = this.landmarkItem(navItems[i]);
if (item) {
list.push(item);
}
}
return list;
}
/**
* Create a landmarkItem
* @private
* @param {element} item
* @return {object} landmarkItem
*/
landmarkItem(item){
let content = filterChildren(item, "a", true);
if (!content) {
return;
}
let type = content.getAttributeNS("http://www.idpf.org/2007/ops", "type") || undefined;
let href = content.getAttribute("href") || "";
let text = content.textContent || "";
return {
"href": href,
"label": text,
"type" : type
};
}
/**
* Parse from a Epub > 3.0 NC
* @private