Mon 21 Jul 22:43:21 CEST 2025

js/term/widgets/ansiimage.js

@@ -0,0 +1,193 @@
+/**
+ **      ==============================
+ **       O           O      O   OOOO
+ **       O           O     O O  O   O
+ **       O           O     O O  O   O
+ **       OOOO   OOOO O     OOO  OOOO
+ **       O   O       O    O   O O   O
+ **       O   O       O    O   O O   O
+ **       OOOO        OOOO O   O OOOO
+ **      ==============================
+ **      Dr. Stefan Bosse http://www.bsslab.de
+ **
+ **      COPYRIGHT: THIS SOFTWARE, EXECUTABLE AND SOURCE CODE IS OWNED
+ **                 BY THE AUTHOR(S).
+ **                 THIS SOURCE CODE MAY NOT BE COPIED, EXTRACTED,
+ **                 MODIFIED, OR OTHERWISE USED IN A CONTEXT
+ **                 OUTSIDE OF THE SOFTWARE SYSTEM.
+ **
+ **    $AUTHORS:     Christopher Jeffrey and contributors, Stefan Bosse
+ **    $INITIAL:     (C) 2013-2015, Christopher Jeffrey and contributors
+ **    $MODIFIED:    sbosse (2017).
+ **    $VERSION:     1.2.2
+ **
+ **    $INFO:
+ *
+ * ansiimage.js - render PNGS/GIFS as ANSI
+ *
+ **    $ENDOFINFO
+ */
+
+/**
+ * Modules
+ */
+var Comp = Require('com/compat');
+
+var cp = Require('child_process');
+
+var colors = Require('term/colors');
+
+var Node = Require('term/widgets/node');
+var Box = Require('term/widgets/box');
+
+var tng = Require('term/tng');
+
+/**
+ * ANSIImage
+ */
+
+function ANSIImage(options) {
+  var self = this;
+
+  if (!instanceOf(this,Node)) {
+    return new ANSIImage(options);
+  }
+
+  options = options || {};
+  options.shrink = true;
+
+  Box.call(this, options);
+
+  this.scale = this.options.scale || 1.0;
+  this.options.animate = this.options.animate !== false;
+  this._noFill = true;
+
+  if (this.options.file) {
+    this.setImage(this.options.file);
+  }
+
+  this.screen.on('prerender', function() {
+    var lpos = self.lpos;
+    if (!lpos) return;
+    // prevent image from blending with itself if there are alpha channels
+    self.screen.clearRegion(lpos.xi, lpos.xl, lpos.yi, lpos.yl);
+  });
+
+  this.on('destroy', function() {
+    self.stop();
+  });
+}
+
+//ANSIImage.prototype.__proto__ = Box.prototype;
+inheritPrototype(ANSIImage,Box);
+
+ANSIImage.prototype.type = 'ansiimage';
+
+ANSIImage.curl = function(url) {
+  try {
+    return cp.execFileSync('curl',
+      ['-s', '-A', '', url],
+      { stdio: ['ignore', 'pipe', 'ignore'] });
+  } catch (e) {
+    ;
+  }
+  try {
+    return cp.execFileSync('wget',
+      ['-U', '', '-O', '-', url],
+      { stdio: ['ignore', 'pipe', 'ignore'] });
+  } catch (e) {
+    ;
+  }
+  throw new Error('curl or wget failed.');
+};
+
+ANSIImage.prototype.setImage = function(file) {
+  this.file = typeof file === 'string' ? file : null;
+
+  if (/^https?:/.test(file)) {
+    file = ANSIImage.curl(file);
+  }
+
+  var width = this.position.width;
+  var height = this.position.height;
+
+  if (width != null) {
+    width = this.width;
+  }
+
+  if (height != null) {
+    height = this.height;
+  }
+
+  try {
+    this.setContent('');
+
+    this.img = tng(file, {
+      colors: colors,
+      width: width,
+      height: height,
+      scale: this.scale,
+      ascii: this.options.ascii,
+      speed: this.options.speed,
+      filename: this.file
+    });
+
+    if (width == null || height == null) {
+      this.width = this.img.cellmap[0].length;
+      this.height = this.img.cellmap.length;
+    }
+
+    if (this.img.frames && this.options.animate) {
+      this.play();
+    } else {
+      this.cellmap = this.img.cellmap;
+    }
+  } catch (e) {
+    this.setContent('Image Error: ' + e.message);
+    this.img = null;
+    this.cellmap = null;
+  }
+};
+
+ANSIImage.prototype.play = function() {
+  var self = this;
+  if (!this.img) return;
+  return this.img.play(function(bmp, cellmap) {
+    self.cellmap = cellmap;
+    self.screen.render();
+  });
+};
+
+ANSIImage.prototype.pause = function() {
+  if (!this.img) return;
+  return this.img.pause();
+};
+
+ANSIImage.prototype.stop = function() {
+  if (!this.img) return;
+  return this.img.stop();
+};
+
+ANSIImage.prototype.clearImage = function() {
+  this.stop();
+  this.setContent('');
+  this.img = null;
+  this.cellmap = null;
+};
+
+ANSIImage.prototype.render = function() {
+  var coords = this._render();
+  if (!coords) return;
+
+  if (this.img && this.cellmap) {
+    this.img.renderElement(this.cellmap, this);
+  }
+
+  return coords;
+};
+
+/**
+ * Expose
+ */
+
+module.exports = ANSIImage;