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mkd2slide.js
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mkd2slide.js
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var fs = require('fs'),
path = require('path'),
sys = require('sys'),
hl = require('highlighter').Highlight,
spawn = require('child_process').spawn;
var md;
try {
md = require('//robotskirt').toHtmlSync;
} catch (e) {
try {
md = require('discount').parse;
} catch (e) {
md = require('github-flavored-markdown').parse;
}
}
if (!md) {
console.log('require a markdown parser, e.g. discount, github-flavored-markdown');
}
exports.run = function(args) {
var options = {};
var arg;
while (arg = args.shift()) {
switch (arg) {
case '--html':
options.html = true;
break;
case '--md':
options.md = true;
break;
default:
if (! options.input_filename) {
options.input_filename = arg;
} else {
options.output_filename = arg;
}
}
}
var text = fs.readFileSync(options.input_filename, 'utf-8');
var title = getTitle(text);
var results = slidefy(text);
var html = makeStaticHtml(title, results[0]);
var outfile = options.output_filename || options.input_filename.replace(/\.[^\.]*$/, '.pdf');
if (outfile == args[0]) {
outfile = outfile + '.pdf';
}
var htmlfile = options.input_filename.replace(/\.[^\.]*$/, '.html');
fs.writeFileSync(htmlfile, html, 'utf-8');
if(options.md){
var mdfile = options.input_filename.replace(/\.[^\.]*$/, '.out.md');
fs.writeFileSync(mdfile, results[1], 'utf-8');
}
var proc = spawn('wkhtmltopdf', ['-L', '0', '-R', '0', '-T', '2', '-B', '2', '--page-width', '240', '--page-height', '180', htmlfile, outfile]);
// proc.stdin.write(html);
// proc.stdin.end();
proc.stderr.on('data', function(data) {
process.stderr.write(data);
});
proc.stdout.on('data', function(data) {
process.stdout.write(data);
});
};
function makeStaticHtml(title, body, css) {
css = path.resolve(css || 'style.css');
var highlight_style = 'github';
return '<!DOCTYPE HTML>' +
'<html>' +
'<head>' +
' <meta charset="utf-8">' +
' <title>' + title + '</title>' +
' <link rel=stylesheet type="text/css" href="' + __dirname + '/' + highlight_style + '.css">' +
' <link rel=stylesheet type="text/css" href="' + __dirname + '/style.css">' +
(path.existsSync(css) ?
' <link rel=stylesheet type="text/css" href="' + css + '">' :
'') +
'</head>' +
'<body>' +
body +
'</body>' +
'</html>';
}
function getTitle(text) {
return text.split('\n', 1)[0].replace(/^#*\s*/, '');
}
function slidefy(text) {
text = text.replace(/\r\n/g, '\n');
var lines = text.split('\n');
var pages = [];
var curr_page, curr_pages, state, copy_postion, from_page, to_page;
newBasePage();
for (var i = 0; i < lines.length; i++) {
var line = lines[i];
if (curr_page.length > 0 && (/^#+ /.test(line) || /^(-{3,}|=+)$/.test(lines[i + 1]))) {
pages = pages.concat(curr_pages);
newBasePage();
}
var m;
if (m = /^\+(\+|\d+)(\-(\d+)?)?(\s(.*))?$/.exec(line)) {
state = 'afterpend';
from_page = m[1] == '+' ? curr_pages.length : parseInt(m[1]);
initPage(from_page);
if (m[2]) {
to_page = m[3] ? parseInt(m[3]) : from_page;
initPage(to_page);
} else {
to_page = null;
copy_postion = curr_pages.length - 1;
}
line = m[5];
} else if (m = /^\-(\-|\d+)(\s(.*))?$/.exec(line)) {
state = 'prepend';
from_page = m[1] == '-' ? curr_pages.length - 1 : parseInt(m[1]);
initPage(from_page);
line = m[3];
}
if (line === undefined) continue;
if (state == 'prepend') {
prepend(line, from_page);
} else if (state == 'afterpend') {
afterpend(line, from_page, to_page);
}
}
pages = pages.concat(curr_pages);
var htmlList = [], mdList = [];
for (var i = 0; i < pages.length; i++) {
var clz = 'page';
if (i == 0) {
clz = 'page first';
}
if (i == pages.length - 1) {
clz = 'page last';
}
var pagemd = pages[i].join('\n');
mdList.push(pagemd);
htmlList.push(makePage(pagemd, clz));
}
return [htmlList.join('\n\n'), mdList.join('\n\n')];
function newBasePage() {
curr_page = [];
curr_pages = [curr_page];
state = 'afterpend';
from_page = 0;
to_page = null;
copy_postion = 0;
}
function initPage(num) {
for (var i = curr_pages.length; i <= num; i++) {
curr_pages[i] = curr_pages[copy_postion].slice();
}
}
function prepend(line, num) {
for (var i = num || (curr_pages.length - 1); i >= 0; i--) {
curr_pages[i].push(line);
}
}
function afterpend(line, from, to) {
to = to || (curr_pages.length - 1);
for (var i = from || 0; i <= to; i++) {
curr_pages[i].push(line);
}
}
}
function makePage(pagemd, clazz) {
return '<div class="' + clazz + '">\n' + hl(md(pagemd), false, true) + '\n</div>';
}