%PDF-
%PDF-
Mini Shell
Mini Shell
/**
* ansi-viewer
* ANSI art viewer for node.
* Copyright (c) 2015, Christopher Jeffrey and contributors (MIT License).
* https://github.com/chjj/blessed
*/
var blessed = require('blessed')
, request = require('request')
, singlebyte = require('./singlebyte')
, fs = require('fs');
// $ wget -r -o log --tries=10 'http://artscene.textfiles.com/ansi/'
// $ grep 'http.*\.ans$' log | awk '{ print $3 }' > ansi-art.list
var urls = fs.readFileSync(__dirname + '/ansi-art.list', 'utf8').trim().split('\n');
var map = urls.reduce(function(map, url) {
map[/([^.\/]+\/[^.\/]+)\.ans$/.exec(url)[1]] = url;
return map;
}, {});
var max = Object.keys(map).reduce(function(out, text) {
return Math.max(out, text.length);
}, 0) + 6;
var screen = blessed.screen({
smartCSR: true,
dockBorders: true
});
var art = blessed.terminal({
parent: screen,
left: 0,
top: 0,
height: 60,
// some are 78/80, some are 80/82
width: 82,
border: 'line',
tags: true,
label: ' {bold}{cyan-fg}ANSI Art{/cyan-fg}{/bold} (Drag Me) ',
handler: function() {},
draggable: true
});
var list = blessed.list({
parent: screen,
label: ' {bold}{cyan-fg}Art List{/cyan-fg}{/bold} (Drag Me) ',
tags: true,
draggable: true,
top: 0,
right: 0,
width: max,
height: '50%',
keys: true,
vi: true,
mouse: true,
border: 'line',
scrollbar: {
ch: ' ',
track: {
bg: 'cyan'
},
style: {
inverse: true
}
},
style: {
item: {
hover: {
bg: 'blue'
}
},
selected: {
bg: 'blue',
bold: true
}
},
search: function(callback) {
prompt.input('Search:', '', function(err, value) {
if (err) return;
return callback(null, value);
});
}
});
var status = blessed.box({
parent: screen,
bottom: 0,
right: 0,
height: 1,
width: 'shrink',
style: {
bg: 'blue'
},
content: 'Select your piece of ANSI art (`/` to search).'
});
var loader = blessed.loading({
parent: screen,
top: 'center',
left: 'center',
height: 5,
align: 'center',
width: '50%',
tags: true,
hidden: true,
border: 'line'
});
var msg = blessed.message({
parent: screen,
top: 'center',
left: 'center',
height: 'shrink',
width: '50%',
align: 'center',
tags: true,
hidden: true,
border: 'line'
});
var prompt = blessed.prompt({
parent: screen,
top: 'center',
left: 'center',
height: 'shrink',
width: 'shrink',
keys: true,
vi: true,
mouse: true,
tags: true,
border: 'line',
hidden: true
});
list.setItems(Object.keys(map));
list.on('select', function(el, selected) {
if (list._.rendering) return;
var name = el.getText();
var url = map[name];
status.setContent(url);
list._.rendering = true;
loader.load('Loading...');
request({
uri: url,
encoding: null
}, function(err, res, body) {
list._.rendering = false;
loader.stop();
if (err) {
return msg.error(err.message);
}
if (!body) {
return msg.error('No body.');
}
return cp437ToUtf8(body, function(err, body) {
if (err) {
return msg.error(err.message);
}
if (process.argv[2] === '--debug') {
var filename = name.replace(/\//g, '.') + '.ans';
fs.writeFileSync(__dirname + '/' + filename, body);
}
// Remove text:
body = body.replace('Downloaded From P-80 International Information Systems 304-744-2253', '');
// Remove MCI codes:
body = body.replace(/%[A-Z0-9]{2}/g, '');
// ^A (SOH) seems to need to produce CRLF in some cases??
// body = body.replace(/\x01/g, '\r\n');
// Reset and write the art:
art.term.reset();
art.term.write(body);
art.term.cursorHidden = true;
screen.render();
if (process.argv[2] === '--debug' || process.argv[2] === '--save') {
takeScreenshot(name);
}
});
});
});
list.items.forEach(function(item, i) {
var text = item.getText();
item.setHover(map[text]);
});
list.focus();
list.enterSelected(0);
screen.key('h', function() {
list.toggle();
if (list.visible) list.focus();
});
screen.key('r', function() {
shuffle();
});
screen.key('S-s', function() {
takeScreenshot(list.ritems[list.selected]);
});
screen.key('s', function() {
slideshow();
});
screen.key('q', function() {
return process.exit(0);
});
screen.render();
/**
* Helpers
*/
// https://github.com/chjj/blessed/issues/127
// https://github.com/Mithgol/node-singlebyte
function cp437ToUtf8(buf, callback) {
try {
return callback(null, singlebyte.bufToStr(buf, 'cp437'));
} catch (e) {
return callback(e);
}
}
// Animating ANSI art doesn't work for screenshots.
var ANIMATING = [
'bbs/void3',
'holiday/xmasfwks',
'unsorted/diver',
'unsorted/mash-chp',
'unsorted/ryans47',
'unsorted/xmasfwks'
];
function takeScreenshot(name) {
var filename = name.replace(/\//g, '.') + '.ans.sgr';
var image;
// Animating art hangs terminal during screenshot as of right now.
if (~ANIMATING.indexOf(name)) {
image = blessed.element.prototype.screenshot.call(art,
0 - art.ileft, art.width - art.iright,
0 - art.itop, art.height - art.ibottom);
} else {
image = art.screenshot();
}
fs.writeFileSync(__dirname + '/' + filename, image);
msg.display('Screenshot taken.');
}
function slideshow() {
if (!screen._.slideshow) {
screen._.slideshow = setInterval(function slide() {
if (screen.lockKeys) return;
var i = (list.items.length - 1) * Math.random() | 0;
list.enterSelected(i);
return slide;
}(), 3000);
msg.display('Slideshow started.');
} else {
clearInterval(screen._.slideshow);
delete screen._.slideshow;
msg.display('Slideshow stopped.');
}
}
function shuffle() {
var items = Object.keys(map).sort(function(key) {
return Math.random() > 0.5 ? 1 : -1;
});
list.setItems(items);
screen.render();
msg.display('Shuffled items.');
}
Zerion Mini Shell 1.0