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Viewing file:     progressbar.js (3.47 KB)      -rw-r--r--

/**
 * progressbar.js - progress bar element for blessed
 * Copyright (c) 2013-2015, Christopher Jeffrey and contributors (MIT License).
 * https://github.com/chjj/blessed
 */

/**
 * Modules
 */

var Node = require('./node');
var Input = require('./input');

/**
 * ProgressBar
 */

function ProgressBar(options) {
  var self = this;

  if (!(this instanceof Node)) {
    return new ProgressBar(options);
  }

  options = options || {};

  Input.call(this, options);

  this.filled = options.filled || 0;
  if (typeof this.filled === 'string') {
    this.filled = +this.filled.slice(0, -1);
  }
  this.value = this.filled;

  this.pch = options.pch || ' ';

  // XXX Workaround that predates the usage of `el.ch`.
  if (options.ch) {
    this.pch = options.ch;
    this.ch = ' ';
  }
  if (options.bch) {
    this.ch = options.bch;
  }

  if (!this.style.bar) {
    this.style.bar = {};
    this.style.bar.fg = options.barFg;
    this.style.bar.bg = options.barBg;
  }

  this.orientation = options.orientation || 'horizontal';

  if (options.keys) {
    this.on('keypress', function(ch, key) {
      var back, forward;
      if (self.orientation === 'horizontal') {
        back = ['left', 'h'];
        forward = ['right', 'l'];
      } else if (self.orientation === 'vertical') {
        back = ['down', 'j'];
        forward = ['up', 'k'];
      }
      if (key.name === back[0] || (options.vi && key.name === back[1])) {
        self.progress(-5);
        self.screen.render();
        return;
      }
      if (key.name === forward[0] || (options.vi && key.name === forward[1])) {
        self.progress(5);
        self.screen.render();
        return;
      }
    });
  }

  if (options.mouse) {
    this.on('click', function(data) {
      var x, y, m, p;
      if (!self.lpos) return;
      if (self.orientation === 'horizontal') {
        x = data.x - self.lpos.xi;
        m = (self.lpos.xl - self.lpos.xi) - self.iwidth;
        p = x / m * 100 | 0;
      } else if (self.orientation === 'vertical') {
        y = data.y - self.lpos.yi;
        m = (self.lpos.yl - self.lpos.yi) - self.iheight;
        p = y / m * 100 | 0;
      }
      self.setProgress(p);
    });
  }
}

ProgressBar.prototype.__proto__ = Input.prototype;

ProgressBar.prototype.type = 'progress-bar';

ProgressBar.prototype.render = function() {
  var ret = this._render();
  if (!ret) return;

  var xi = ret.xi
    , xl = ret.xl
    , yi = ret.yi
    , yl = ret.yl
    , dattr;

  if (this.border) xi++, yi++, xl--, yl--;

  if (this.orientation === 'horizontal') {
    xl = xi + ((xl - xi) * (this.filled / 100)) | 0;
  } else if (this.orientation === 'vertical') {
    yi = yi + ((yl - yi) - (((yl - yi) * (this.filled / 100)) | 0));
  }

  dattr = this.sattr(this.style.bar);

  this.screen.fillRegion(dattr, this.pch, xi, xl, yi, yl);

  if (this.content) {
    var line = this.screen.lines[yi];
    for (var i = 0; i < this.content.length; i++) {
      line[xi + i][1] = this.content[i];
    }
    line.dirty = true;
  }

  return ret;
};

ProgressBar.prototype.progress = function(filled) {
  this.filled += filled;
  if (this.filled < 0) this.filled = 0;
  else if (this.filled > 100) this.filled = 100;
  if (this.filled === 100) {
    this.emit('complete');
  }
  this.value = this.filled;
};

ProgressBar.prototype.setProgress = function(filled) {
  this.filled = 0;
  this.progress(filled);
};

ProgressBar.prototype.reset = function() {
  this.emit('reset');
  this.filled = 0;
  this.value = this.filled;
};

/**
 * Expose
 */

module.exports = ProgressBar;