94 lines
2.1 KiB
JavaScript
94 lines
2.1 KiB
JavaScript
(function(){
|
|
|
|
if(!window.Prism) {
|
|
return;
|
|
}
|
|
|
|
function $$(expr, con) {
|
|
return Array.prototype.slice.call((con || document).querySelectorAll(expr));
|
|
}
|
|
|
|
var CRLF = crlf = /\r?\n|\r/g;
|
|
|
|
function highlightLines(pre, lines, classes) {
|
|
var ranges = lines.replace(/\s+/g, '').split(','),
|
|
offset = +pre.getAttribute('data-line-offset') || 0;
|
|
|
|
var lineHeight = parseFloat(getComputedStyle(pre).lineHeight);
|
|
|
|
for (var i=0, range; range = ranges[i++];) {
|
|
range = range.split('-');
|
|
|
|
var start = +range[0],
|
|
end = +range[1] || start;
|
|
|
|
var line = document.createElement('div');
|
|
|
|
line.textContent = Array(end - start + 2).join(' \r\n');
|
|
line.className = (classes || '') + ' line-highlight';
|
|
line.setAttribute('data-start', start);
|
|
|
|
if(end > start) {
|
|
line.setAttribute('data-end', end);
|
|
}
|
|
|
|
line.style.top = (start - offset - 1) * lineHeight + 'px';
|
|
|
|
(pre.querySelector('code') || pre).appendChild(line);
|
|
}
|
|
}
|
|
|
|
function applyHash() {
|
|
var hash = location.hash.slice(1);
|
|
|
|
// Remove pre-existing temporary lines
|
|
$$('.temporary.line-highlight').forEach(function (line) {
|
|
line.parentNode.removeChild(line);
|
|
});
|
|
|
|
var range = (hash.match(/\.([\d,-]+)$/) || [,''])[1];
|
|
|
|
if (!range || document.getElementById(hash)) {
|
|
return;
|
|
}
|
|
|
|
var id = hash.slice(0, hash.lastIndexOf('.')),
|
|
pre = document.getElementById(id);
|
|
|
|
if (!pre) {
|
|
return;
|
|
}
|
|
|
|
if (!pre.hasAttribute('data-line')) {
|
|
pre.setAttribute('data-line', '');
|
|
}
|
|
|
|
highlightLines(pre, range, 'temporary ');
|
|
|
|
document.querySelector('.temporary.line-highlight').scrollIntoView();
|
|
}
|
|
|
|
var fakeTimer = 0; // Hack to limit the number of times applyHash() runs
|
|
|
|
Prism.hooks.add('after-highlight', function(env) {
|
|
var pre = env.element.parentNode;
|
|
var lines = pre && pre.getAttribute('data-line');
|
|
|
|
if (!pre || !lines || !/pre/i.test(pre.nodeName)) {
|
|
return;
|
|
}
|
|
|
|
clearTimeout(fakeTimer);
|
|
|
|
$$('.line-highlight', pre).forEach(function (line) {
|
|
line.parentNode.removeChild(line);
|
|
});
|
|
|
|
highlightLines(pre, lines);
|
|
|
|
fakeTimer = setTimeout(applyHash, 1);
|
|
});
|
|
|
|
addEventListener('hashchange', applyHash);
|
|
|
|
})(); |