722 lines
15 KiB
JavaScript
722 lines
15 KiB
JavaScript
|
/**
|
||
|
|
* image.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');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Image
|
||
|
|
* Good example of w3mimgdisplay commands:
|
||
|
|
* https://github.com/hut/ranger/blob/master/ranger/ext/img_display.py
|
||
|
|
*/
|
||
|
|
|
||
|
|
function Image(options) {
|
||
|
|
var self = this;
|
||
|
|
|
||
|
|
if (!(this instanceof Node)) {
|
||
|
|
return new Image(options);
|
||
|
|
}
|
||
|
|
|
||
|
|
options = options || {};
|
||
|
|
|
||
|
|
Box.call(this, options);
|
||
|
|
|
||
|
|
if (options.w3m) {
|
||
|
|
Image.w3mdisplay = options.w3m;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Image.hasW3MDisplay == null) {
|
||
|
|
if (fs.existsSync(Image.w3mdisplay)) {
|
||
|
|
Image.hasW3MDisplay = true;
|
||
|
|
} else if (options.search !== false) {
|
||
|
|
var file = helpers.findFile('/usr', 'w3mimgdisplay')
|
||
|
|
|| helpers.findFile('/lib', 'w3mimgdisplay')
|
||
|
|
|| helpers.findFile('/bin', 'w3mimgdisplay');
|
||
|
|
if (file) {
|
||
|
|
Image.hasW3MDisplay = true;
|
||
|
|
Image.w3mdisplay = file;
|
||
|
|
} else {
|
||
|
|
Image.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 === 'image' && 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);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Image.prototype.__proto__ = Box.prototype;
|
||
|
|
|
||
|
|
Image.prototype.type = 'image';
|
||
|
|
|
||
|
|
Image.w3mdisplay = '/usr/lib/w3m/w3mimgdisplay';
|
||
|
|
|
||
|
|
Image.prototype.spawn = function(file, args, opt, callback) {
|
||
|
|
var screen = this.screen
|
||
|
|
, opt = opt || {}
|
||
|
|
, spawn = require('child_process').spawn
|
||
|
|
, ps;
|
||
|
|
|
||
|
|
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;
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.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(err, success) {
|
||
|
|
self._settingImage = false;
|
||
|
|
self._queue = self._queue || [];
|
||
|
|
var item = self._queue.shift();
|
||
|
|
if (item) {
|
||
|
|
self.setImage(item[0], item[1]);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
if (Image.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);
|
||
|
|
});
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.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 (Image.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(Image.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();
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.prototype.clearImage = function(callback) {
|
||
|
|
var self = this;
|
||
|
|
|
||
|
|
if (cp.execSync) {
|
||
|
|
callback = callback || function(err, result) { return result; };
|
||
|
|
try {
|
||
|
|
return callback(null, this.clearImageSync());
|
||
|
|
} catch (e) {
|
||
|
|
return callback(e);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Image.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(Image.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();
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.prototype.imageSize = function(callback) {
|
||
|
|
var self = this;
|
||
|
|
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 (Image.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(Image.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();
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.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 (Image.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(Image.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();
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.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);
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.prototype.renderImageSync = function(img, ratio) {
|
||
|
|
var self = this;
|
||
|
|
|
||
|
|
if (Image.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(Image.w3mdisplay, [], {
|
||
|
|
env: process.env,
|
||
|
|
encoding: 'utf8',
|
||
|
|
input: input,
|
||
|
|
timeout: 1000
|
||
|
|
});
|
||
|
|
} catch (e) {
|
||
|
|
;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.prototype.clearImageSync = function() {
|
||
|
|
if (Image.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(Image.w3mdisplay, [], {
|
||
|
|
env: process.env,
|
||
|
|
encoding: 'utf8',
|
||
|
|
input: input,
|
||
|
|
timeout: 1000
|
||
|
|
});
|
||
|
|
} catch (e) {
|
||
|
|
;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.prototype.imageSizeSync = function() {
|
||
|
|
var img = this.file;
|
||
|
|
|
||
|
|
if (Image.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(Image.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]
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.prototype.termSizeSync = function(_, recurse) {
|
||
|
|
if (Image.hasW3MDisplay === false) {
|
||
|
|
throw new Error('W3M Image Display not available.');
|
||
|
|
}
|
||
|
|
|
||
|
|
var buf = '';
|
||
|
|
|
||
|
|
try {
|
||
|
|
buf = cp.execFileSync(Image.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]
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.prototype.getPixelRatioSync = function() {
|
||
|
|
var self = this;
|
||
|
|
|
||
|
|
// 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;
|
||
|
|
};
|
||
|
|
|
||
|
|
Image.prototype.displayImage = function(callback) {
|
||
|
|
return this.screen.displayImage(this.file, callback);
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = Image;
|