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Footnote support
// ==UserScript==
// @name HPMOR Footnote
// @namespace http://youmu.moe/
// @version 0.3
// @description Footnote support
// @author Shuhao Tan
// @match http://hpmor.lofter.com/post/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
function findFootnotenodes(id) {
var xpath_finder;
var elems = [];
var i;
xpath_finder = document.evaluate('//p[contains(.,"[' + id + ']")]', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE);
for(i = 0; i < xpath_finder.snapshotLength; i++) {
elems.push(xpath_finder.snapshotItem(i));
}
xpath_finder = document.evaluate('//p[contains(.,"［' + id + '］")]', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE);
for(i = 0; i < xpath_finder.snapshotLength; i++) {
elems.push(xpath_finder.snapshotItem(i));
}
return elems;
}
function findFootnodeStart() {
var elems;
var i;
elems = findFootnotenodes(1);
if(elems.length === 0) {
return null;
}
for(i = 0; i < elems.length; i++) {
if(elems[i].textContent.match(/^\s*[\[［]1[］\]]/i)) {
return elems[i];
}
}
}
function isFootnote(elem) {
return elem && elem.textContent.match(/^\s*[\[［]\d+[］\]]/i);
}
function generateFootnote(elem) {
var id = elem.textContent.match(/^\s*[\[［](\d+)[］\]]/i)[1];
var pattern = "([\\[［]" + id + "[］\\]])";
var regex = new RegExp(pattern, 'g');
var elems = findFootnotenodes(id);
var foottext = elem.textContent.replace('"', '"').replace(/^\s*[\[［]\d+[］\]]/i, '');
var i;
elem.setAttribute('id', 'footnote_' + id);
for(i = 0; i < elems.length; i++) {
if(elems[i] != elem) {
elems[i].innerHTML = elems[i].innerHTML.replace(regex, '<a footnote="' + foottext + '" class="body_footnote" href="#footnote_' + id + '">$1</a>');
}
}
}
var elem = findFootnodeStart();
if(!elem) {
return;
}
while(isFootnote(elem)) {
generateFootnote(elem);
elem = elem.nextElementSibling;
}
function addGlobalStyle(css) {
var head, style;
head = document.getElementsByTagName('head')[0];
if (!head) { return; }
style = document.createElement('style');
style.type = 'text/css';
style.innerHTML = css;
head.appendChild(style);
}
addGlobalStyle('a.body_footnote { width:auto; position:relative; }');
addGlobalStyle('a.body_footnote::after {line-height: 1.3em; opacity: 0; transition: opacity linear 150ms; border-radius: 3px; background: #444; width: 300px; color: #ccc; content: attr(footnote);padding: 5px;left: -5px;top: 100%; margin-top: 7px; position: absolute;z-index: 1;pointer-events: none;word-wrap: break-word; }');
addGlobalStyle('a.body_footnote:hover::after, a.body_footnote:hover::before {opacity: 1;}');
addGlobalStyle('a.body_footnote::before {opacity: 0; transition: opacity linear 150ms;width: 0;height: 0;border: solid;border-color:#444 transparent;border-width:0 6px 6px 6px;left: 3px;margin-top: 1px; content: "";top: 100%;position: absolute;z-index: 1;pointer-events: none;');
})();