HackMD/public/js/extra.js

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//get title
function getTitle(view) {
var h1s = view.find("h1");
var title = "";
if (h1s.length > 0) {
title = h1s.first().text();
} else {
title = null;
}
return title;
}
//render title
function renderTitle(view) {
var title = getTitle(view);
if (title) {
title += ' - HackMD';
} else {
title = 'HackMD - Collaborative notes';
}
return title;
}
//render filename
function renderFilename(view) {
var filename = getTitle(view);
if (!filename) {
filename = 'Untitled';
}
return filename;
}
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var viewAjaxCallback = null;
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//dynamic event or object binding here
function finishView(view) {
//youtube
view.find(".youtube").click(function () {
imgPlayiframe(this, '//www.youtube.com/embed/');
});
//vimeo
view.find(".vimeo")
.click(function () {
imgPlayiframe(this, '//player.vimeo.com/video/');
})
.each(function (key, value) {
$.ajax({
type: 'GET',
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url: '//vimeo.com/api/v2/video/' + $(value).attr('videoid') + '.json',
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jsonp: 'callback',
dataType: 'jsonp',
success: function (data) {
var thumbnail_src = data[0].thumbnail_large;
$(value).css('background-image', 'url(' + thumbnail_src + ')');
}
});
});
//gist
view.find("code[data-gist-id]").each(function(key, value) {
if($(value).children().length == 0)
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$(value).gist(viewAjaxCallback);
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});
//emojify
emojify.run(view[0]);
//mathjax
var mathjaxdivs = view.find('.mathjax').toArray();
try {
for (var i = 0; i < mathjaxdivs.length; i++) {
MathJax.Hub.Queue(["Typeset", MathJax.Hub, mathjaxdivs[i].innerHTML]);
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MathJax.Hub.Queue(viewAjaxCallback);
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$(mathjaxdivs[i]).removeClass("mathjax");
}
} catch(err) {
}
//sequence diagram
var sequence = view.find(".sequence-diagram");
try {
sequence.sequenceDiagram({
theme: 'simple'
});
sequence.parent().parent().replaceWith(sequence);
sequence.removeClass("sequence-diagram");
} catch(err) {
console.error(err);
}
//flowchart
var flow = view.find(".flow-chart");
flow.each(function (key, value) {
try {
var chart = flowchart.parse($(value).text());
$(value).html('');
chart.drawSVG(value, {
'line-width': 2,
'fill': 'none',
'font-size': '16px',
'font-family': "'Andale Mono', monospace"
});
$(value).parent().parent().replaceWith(value);
$(value).removeClass("flow-chart");
} catch(err) {
console.error(err);
}
});
//render title
document.title = renderTitle(view);
}
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//regex for blockquote
var spaceregex = /\s*/;
var notinhtmltagregex = /(?![^<]*>|[^<>]*<\/)/;
var coloregex = /\[color=([#|\(|\)|\s|\,|\w]*)\]/;
coloregex = new RegExp(coloregex.source + notinhtmltagregex.source, "g");
var nameregex = /\[name=([-|_|\s|\w]*)\]/;
var timeregex = /\[time=([:|,|+|-|\(|\)|\s|\w]*)\]/;
var nameandtimeregex = new RegExp(nameregex.source + spaceregex.source + timeregex.source + notinhtmltagregex.source, "g");
nameregex = new RegExp(nameregex.source + notinhtmltagregex.source, "g");
timeregex = new RegExp(timeregex.source + notinhtmltagregex.source, "g");
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//only static transform should be here
function postProcess(code) {
var result = $('<div>' + code + '</div>');
//prevent XSS
result.find("script").replaceWith(function () {
return "<noscript>" + $(this).html() + "</noscript>"
});
result.find("iframe").replaceWith(function () {
return "<noiframe>" + $(this).html() + "</noiframe>"
});
//todo list
var lis = result[0].getElementsByTagName('li');
for (var i = 0; i < lis.length; i++) {
var html = lis[i].innerHTML;
if (/^\s*\[[x ]\]\s+/.test(html)) {
lis[i].innerHTML = html.replace(/^\s*\[ \]\s*/, '<input type="checkbox" class="task-list-item-checkbox" disabled>')
.replace(/^\s*\[x\]\s*/, '<input type="checkbox" class="task-list-item-checkbox" checked disabled>');
lis[i].setAttribute('class', 'task-list-item');
}
}
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//blockquote
var blockquote = result.find("blockquote");
blockquote.each(function (key, value) {
var html = $(value).html();
html = html.replace(coloregex, '<span class="color" data-color="$1"></span>');
html = html.replace(nameandtimeregex, '<small><i class="fa fa-user"></i> $1 <i class="fa fa-clock-o"></i> $2</small>');
html = html.replace(nameregex, '<small><i class="fa fa-user"></i> $1</small>');
html = html.replace(timeregex, '<small><i class="fa fa-clock-o"></i> $1</small>');
$(value).html(html);
});
var blockquotecolor = result.find("blockquote .color");
blockquotecolor.each(function (key, value) {
$(value).closest("blockquote").css('border-left-color', $(value).attr('data-color'));
});
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return result;
}
function setSizebyAttr(element, target) {
var width = $(element).attr("width") ? $(element).attr("width") : '100%';
var height = $(element).attr("height") ? $(element).attr("height") : '360px';
$(target).width(width);
$(target).height(height);
}
function imgPlayiframe(element, src) {
if (!$(element).attr("videoid")) return;
var iframe = $("<iframe frameborder='0' webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>");
$(iframe).attr("src", src + $(element).attr("videoid") + '?autoplay=1');
setSizebyAttr(element, iframe);
$(element).html(iframe);
}
var anchorForId = function (id) {
var anchor = document.createElement("a");
anchor.className = "header-link";
anchor.href = "#" + id;
anchor.innerHTML = "<span class=\"sr-only\">Permalink</span><i class=\"fa fa-link\"></i>";
anchor.title = "Permalink";
return anchor;
};
var linkifyAnchors = function (level, containingElement) {
var headers = containingElement.getElementsByTagName("h" + level);
for (var h = 0; h < headers.length; h++) {
var header = headers[h];
if (typeof header.id == "undefined" || header.id == "") {
var id = S(header.innerHTML.toLowerCase()).trim().stripTags().dasherize().s;
header.id = encodeURIComponent(id);
}
header.appendChild(anchorForId(header.id));
}
};
function autoLinkify(view) {
var contentBlock = view[0];
if (!contentBlock) {
return;
}
for (var level = 1; level <= 6; level++) {
linkifyAnchors(level, contentBlock);
}
};
function scrollToHash() {
var hash = location.hash;
location.hash = "";
location.hash = hash;
}
function highlightRender(code, lang) {
if (!lang || /no(-?)highlight|plain|text/.test(lang))
return;
if(lang == 'sequence') {
return '<div class="sequence-diagram">' + code + '</div>';
} else if(lang == 'flow') {
return '<div class="flow-chart">' + code + '</div>';
}
var reallang = lang.replace('=', '');
var languages = hljs.listLanguages();
if (languages.indexOf(reallang) == -1) {
var result = hljs.highlightAuto(code);
} else {
var result = hljs.highlight(reallang, code);
}
if (/\=$/.test(lang)) {
var lines = result.value.split('\n');
var linenumbers = [];
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for (var i = 0; i < lines.length - 1; i++) {
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linenumbers[i] = "<div class='linenumber'>" + (i + 1) + "</div>";
}
var linegutter = "<div class='gutter'>" + linenumbers.join('\n') + "</div>";
result.value = "<div class='wrapper'>" + linegutter + "<div class='code'>" + result.value + "</div></div>";
}
return result.value;
}
emojify.setConfig({
img_dir: '/vendor/emojify/images',
ignore_emoticons: true
});
var md = new Remarkable('full', {
html: true,
linkify: true,
typographer: true,
highlight: highlightRender
});
//youtube
var youtubePlugin = new Plugin(
// regexp to match
/{%youtube\s*([\d\D]*?)\s*%}/,
// this function will be called when something matches
function (match, utils) {
var videoid = match[1];
if (!videoid) return;
var div = $('<div class="youtube"></div>');
setSizebyAttr(div, div);
div.attr('videoid', videoid);
var icon = '<i class="icon fa fa-youtube-play fa-5x"></i>';
div.append(icon);
var thumbnail_src = '//img.youtube.com/vi/' + videoid + '/hqdefault.jpg';
div.css('background-image', 'url(' + thumbnail_src + ')');
return div[0].outerHTML;
}
);
//vimeo
var vimeoPlugin = new Plugin(
// regexp to match
/{%vimeo\s*([\d\D]*?)\s*%}/,
// this function will be called when something matches
function (match, utils) {
var videoid = match[1];
if (!videoid) return;
var div = $('<div class="vimeo"></div>');
setSizebyAttr(div, div);
div.attr('videoid', videoid);
var icon = '<i class="icon fa fa-vimeo-square fa-5x"></i>';
div.append(icon);
return div[0].outerHTML;
}
);
//gist
var gistPlugin = new Plugin(
// regexp to match
/{%gist\s*([\d\D]*?)\s*%}/,
// this function will be called when something matches
function (match, utils) {
var gistid = match[1];
var code = '<code data-gist-id="' + gistid + '"/>';
return code;
}
);
//mathjax
var mathjaxPlugin = new Plugin(
// regexp to match
/^\$\$\n([\d\D]*?)\n\$\$$|\$([\d\D]*?)\$/,
// this function will be called when something matches
function (match, utils) {
//var code = $(match).text();
return '<span class="mathjax">' + match[0] + '</span>';
}
);
md.use(youtubePlugin);
md.use(vimeoPlugin);
md.use(gistPlugin);
md.use(mathjaxPlugin);