/usr/local/lib/node_modules/pm2/node_modules/@pm2/blessed/lib/widgets
Edit: /usr/local/lib/node_modules/pm2/node_modules/@pm2/blessed/lib/widgets/overlayimage.js (15411B)
/**
* overlayimage.js - w3m image element for blessed
* Copyright (c) 2013-2015, Christopher Jeffrey and contributors (MIT License).
* https://github.com/chjj/blessed
*/
/**
* Modules
*/
var fs = require('fs')
, cp = require('child_process');
var helpers = require('../helpers');
var Node = require('./node');
var Box = require('./box');
/**
* OverlayImage
* Good example of w3mimgdisplay commands:
* https://github.com/hut/ranger/blob/master/ranger/ext/img_display.py
*/
function OverlayImage(options) {
var self = this;
if (!(this instanceof Node)) {
return new OverlayImage(options);
}
options = options || {};
Box.call(this, options);
if (options.w3m) {
OverlayImage.w3mdisplay = options.w3m;
}
if (OverlayImage.hasW3MDisplay == null) {
if (fs.existsSync(OverlayImage.w3mdisplay)) {
OverlayImage.hasW3MDisplay = true;
} else if (options.search !== false) {
var file = helpers.findFile('/usr', 'w3mimgdisplay')
|| helpers.findFile('/lib', 'w3mimgdisplay')
|| helpers.findFile('/bin', 'w3mimgdisplay');
if (file) {
OverlayImage.hasW3MDisplay = true;
OverlayImage.w3mdisplay = file;
} else {
OverlayImage.hasW3MDisplay = false;
}
}
}
this.on('hide', function() {
self._lastFile = self.file;
self.clearImage();
});
this.on('show', function() {
if (!self._lastFile) return;
self.setImage(self._lastFile);
});
this.on('detach', function() {
self._lastFile = self.file;
self.clearImage();
});
this.on('attach', function() {
if (!self._lastFile) return;
self.setImage(self._lastFile);
});
this.onScreenEvent('resize', function() {
self._needsRatio = true;
});
// Get images to overlap properly. Maybe not worth it:
// this.onScreenEvent('render', function() {
// self.screen.program.flush();
// if (!self._noImage) return;
// function display(el, next) {
// if (el.type === 'w3mimage' && el.file) {
// el.setImage(el.file, next);
// } else {
// next();
// }
// }
// function done(el) {
// el.children.forEach(recurse);
// }
// function recurse(el) {
// display(el, function() {
// var pending = el.children.length;
// el.children.forEach(function(el) {
// display(el, function() {
// if (!--pending) done(el);
// });
// });
// });
// }
// recurse(self.screen);
// });
this.onScreenEvent('render', function() {
self.screen.program.flush();
if (!self._noImage) {
self.setImage(self.file);
}
});
if (this.options.file || this.options.img) {
this.setImage(this.options.file || this.options.img);
}
}
OverlayImage.prototype.__proto__ = Box.prototype;
OverlayImage.prototype.type = 'overlayimage';
OverlayImage.w3mdisplay = '/usr/lib/w3m/w3mimgdisplay';
OverlayImage.prototype.spawn = function(file, args, opt, callback) {
var spawn = require('child_process').spawn
, ps;
opt = opt || {};
ps = spawn(file, args, opt);
ps.on('error', function(err) {
if (!callback) return;
return callback(err);
});
ps.on('exit', function(code) {
if (!callback) return;
if (code !== 0) return callback(new Error('Exit Code: ' + code));
return callback(null, code === 0);
});
return ps;
};
OverlayImage.prototype.setImage = function(img, callback) {
var self = this;
if (this._settingImage) {
this._queue = this._queue || [];
this._queue.push([img, callback]);
return;
}
this._settingImage = true;
var reset = function() {
self._settingImage = false;
self._queue = self._queue || [];
var item = self._queue.shift();
if (item) {
self.setImage(item[0], item[1]);
}
};
if (OverlayImage.hasW3MDisplay === false) {
reset();
if (!callback) return;
return callback(new Error('W3M Image Display not available.'));
}
if (!img) {
reset();
if (!callback) return;
return callback(new Error('No image.'));
}
this.file = img;
return this.getPixelRatio(function(err, ratio) {
if (err) {
reset();
if (!callback) return;
return callback(err);
}
return self.renderImage(img, ratio, function(err, success) {
if (err) {
reset();
if (!callback) return;
return callback(err);
}
if (self.shrink || self.options.autofit) {
delete self.shrink;
delete self.options.shrink;
self.options.autofit = true;
return self.imageSize(function(err, size) {
if (err) {
reset();
if (!callback) return;
return callback(err);
}
if (self._lastSize
&& ratio.tw === self._lastSize.tw
&& ratio.th === self._lastSize.th
&& size.width === self._lastSize.width
&& size.height === self._lastSize.height
&& self.aleft === self._lastSize.aleft
&& self.atop === self._lastSize.atop) {
reset();
if (!callback) return;
return callback(null, success);
}
self._lastSize = {
tw: ratio.tw,
th: ratio.th,
width: size.width,
height: size.height,
aleft: self.aleft,
atop: self.atop
};
self.position.width = size.width / ratio.tw | 0;
self.position.height = size.height / ratio.th | 0;
self._noImage = true;
self.screen.render();
self._noImage = false;
reset();
return self.renderImage(img, ratio, callback);
});
}
reset();
if (!callback) return;
return callback(null, success);
});
});
};
OverlayImage.prototype.renderImage = function(img, ratio, callback) {
var self = this;
if (cp.execSync) {
callback = callback || function(err, result) { return result; };
try {
return callback(null, this.renderImageSync(img, ratio));
} catch (e) {
return callback(e);
}
}
if (OverlayImage.hasW3MDisplay === false) {
if (!callback) return;
return callback(new Error('W3M Image Display not available.'));
}
if (!ratio) {
if (!callback) return;
return callback(new Error('No ratio.'));
}
// clearImage unsets these:
var _file = self.file;
var _lastSize = self._lastSize;
return self.clearImage(function(err) {
if (err) return callback(err);
self.file = _file;
self._lastSize = _lastSize;
var opt = {
stdio: 'pipe',
env: process.env,
cwd: process.env.HOME
};
var ps = self.spawn(OverlayImage.w3mdisplay, [], opt, function(err, success) {
if (!callback) return;
return err
? callback(err)
: callback(null, success);
});
var width = self.width * ratio.tw | 0
, height = self.height * ratio.th | 0
, aleft = self.aleft * ratio.tw | 0
, atop = self.atop * ratio.th | 0;
var input = '0;1;'
+ aleft + ';'
+ atop + ';'
+ width + ';'
+ height + ';;;;;'
+ img
+ '\n4;\n3;\n';
self._props = {
aleft: aleft,
atop: atop,
width: width,
height: height
};
ps.stdin.write(input);
ps.stdin.end();
});
};
OverlayImage.prototype.clearImage = function(callback) {
if (cp.execSync) {
callback = callback || function(err, result) { return result; };
try {
return callback(null, this.clearImageSync());
} catch (e) {
return callback(e);
}
}
if (OverlayImage.hasW3MDisplay === false) {
if (!callback) return;
return callback(new Error('W3M Image Display not available.'));
}
if (!this._props) {
if (!callback) return;
return callback(null);
}
var opt = {
stdio: 'pipe',
env: process.env,
cwd: process.env.HOME
};
var ps = this.spawn(OverlayImage.w3mdisplay, [], opt, function(err, success) {
if (!callback) return;
return err
? callback(err)
: callback(null, success);
});
var width = this._props.width + 2
, height = this._props.height + 2
, aleft = this._props.aleft
, atop = this._props.atop;
if (this._drag) {
aleft -= 10;
atop -= 10;
width += 10;
height += 10;
}
var input = '6;'
+ aleft + ';'
+ atop + ';'
+ width + ';'
+ height
+ '\n4;\n3;\n';
delete this.file;
delete this._props;
delete this._lastSize;
ps.stdin.write(input);
ps.stdin.end();
};
OverlayImage.prototype.imageSize = function(callback) {
var img = this.file;
if (cp.execSync) {
callback = callback || function(err, result) { return result; };
try {
return callback(null, this.imageSizeSync());
} catch (e) {
return callback(e);
}
}
if (OverlayImage.hasW3MDisplay === false) {
if (!callback) return;
return callback(new Error('W3M Image Display not available.'));
}
if (!img) {
if (!callback) return;
return callback(new Error('No image.'));
}
var opt = {
stdio: 'pipe',
env: process.env,
cwd: process.env.HOME
};
var ps = this.spawn(OverlayImage.w3mdisplay, [], opt);
var buf = '';
ps.stdout.setEncoding('utf8');
ps.stdout.on('data', function(data) {
buf += data;
});
ps.on('error', function(err) {
if (!callback) return;
return callback(err);
});
ps.on('exit', function() {
if (!callback) return;
var size = buf.trim().split(/\s+/);
return callback(null, {
raw: buf.trim(),
width: +size[0],
height: +size[1]
});
});
var input = '5;' + img + '\n';
ps.stdin.write(input);
ps.stdin.end();
};
OverlayImage.prototype.termSize = function(callback) {
var self = this;
if (cp.execSync) {
callback = callback || function(err, result) { return result; };
try {
return callback(null, this.termSizeSync());
} catch (e) {
return callback(e);
}
}
if (OverlayImage.hasW3MDisplay === false) {
if (!callback) return;
return callback(new Error('W3M Image Display not available.'));
}
var opt = {
stdio: 'pipe',
env: process.env,
cwd: process.env.HOME
};
var ps = this.spawn(OverlayImage.w3mdisplay, ['-test'], opt);
var buf = '';
ps.stdout.setEncoding('utf8');
ps.stdout.on('data', function(data) {
buf += data;
});
ps.on('error', function(err) {
if (!callback) return;
return callback(err);
});
ps.on('exit', function() {
if (!callback) return;
if (!buf.trim()) {
// Bug: w3mimgdisplay will sometimes
// output nothing. Try again:
return self.termSize(callback);
}
var size = buf.trim().split(/\s+/);
return callback(null, {
raw: buf.trim(),
width: +size[0],
height: +size[1]
});
});
ps.stdin.end();
};
OverlayImage.prototype.getPixelRatio = function(callback) {
var self = this;
if (cp.execSync) {
callback = callback || function(err, result) { return result; };
try {
return callback(null, this.getPixelRatioSync());
} catch (e) {
return callback(e);
}
}
// XXX We could cache this, but sometimes it's better
// to recalculate to be pixel perfect.
if (this._ratio && !this._needsRatio) {
return callback(null, this._ratio);
}
return this.termSize(function(err, dimensions) {
if (err) return callback(err);
self._ratio = {
tw: dimensions.width / self.screen.width,
th: dimensions.height / self.screen.height
};
self._needsRatio = false;
return callback(null, self._ratio);
});
};
OverlayImage.prototype.renderImageSync = function(img, ratio) {
if (OverlayImage.hasW3MDisplay === false) {
throw new Error('W3M Image Display not available.');
}
if (!ratio) {
throw new Error('No ratio.');
}
// clearImage unsets these:
var _file = this.file;
var _lastSize = this._lastSize;
this.clearImageSync();
this.file = _file;
this._lastSize = _lastSize;
var width = this.width * ratio.tw | 0
, height = this.height * ratio.th | 0
, aleft = this.aleft * ratio.tw | 0
, atop = this.atop * ratio.th | 0;
var input = '0;1;'
+ aleft + ';'
+ atop + ';'
+ width + ';'
+ height + ';;;;;'
+ img
+ '\n4;\n3;\n';
this._props = {
aleft: aleft,
atop: atop,
width: width,
height: height
};
try {
cp.execFileSync(OverlayImage.w3mdisplay, [], {
env: process.env,
encoding: 'utf8',
input: input,
timeout: 1000
});
} catch (e) {
;
}
return true;
};
OverlayImage.prototype.clearImageSync = function() {
if (OverlayImage.hasW3MDisplay === false) {
throw new Error('W3M Image Display not available.');
}
if (!this._props) {
return false;
}
var width = this._props.width + 2
, height = this._props.height + 2
, aleft = this._props.aleft
, atop = this._props.atop;
if (this._drag) {
aleft -= 10;
atop -= 10;
width += 10;
height += 10;
}
var input = '6;'
+ aleft + ';'
+ atop + ';'
+ width + ';'
+ height
+ '\n4;\n3;\n';
delete this.file;
delete this._props;
delete this._lastSize;
try {
cp.execFileSync(OverlayImage.w3mdisplay, [], {
env: process.env,
encoding: 'utf8',
input: input,
timeout: 1000
});
} catch (e) {
;
}
return true;
};
OverlayImage.prototype.imageSizeSync = function() {
var img = this.file;
if (OverlayImage.hasW3MDisplay === false) {
throw new Error('W3M Image Display not available.');
}
if (!img) {
throw new Error('No image.');
}
var buf = '';
var input = '5;' + img + '\n';
try {
buf = cp.execFileSync(OverlayImage.w3mdisplay, [], {
env: process.env,
encoding: 'utf8',
input: input,
timeout: 1000
});
} catch (e) {
;
}
var size = buf.trim().split(/\s+/);
return {
raw: buf.trim(),
width: +size[0],
height: +size[1]
};
};
OverlayImage.prototype.termSizeSync = function(_, recurse) {
if (OverlayImage.hasW3MDisplay === false) {
throw new Error('W3M Image Display not available.');
}
var buf = '';
try {
buf = cp.execFileSync(OverlayImage.w3mdisplay, ['-test'], {
env: process.env,
encoding: 'utf8',
timeout: 1000
});
} catch (e) {
;
}
if (!buf.trim()) {
// Bug: w3mimgdisplay will sometimes
// output nothing. Try again:
recurse = recurse || 0;
if (++recurse === 5) {
throw new Error('Term size not determined.');
}
return this.termSizeSync(_, recurse);
}
var size = buf.trim().split(/\s+/);
return {
raw: buf.trim(),
width: +size[0],
height: +size[1]
};
};
OverlayImage.prototype.getPixelRatioSync = function() {
// XXX We could cache this, but sometimes it's better
// to recalculate to be pixel perfect.
if (this._ratio && !this._needsRatio) {
return this._ratio;
}
this._needsRatio = false;
var dimensions = this.termSizeSync();
this._ratio = {
tw: dimensions.width / this.screen.width,
th: dimensions.height / this.screen.height
};
return this._ratio;
};
OverlayImage.prototype.displayImage = function(callback) {
return this.screen.displayImage(this.file, callback);
};
/**
* Expose
*/
module.exports = OverlayImage;