jquery.fittext.js

// Generated by CoffeeScript 1.6.2
/*!
FitText.js 1.1

Copyright 2011, Dave Rupert http://daverupert.com
Released under the WTFPL license
http://sam.zoy.org/wtfpl/
*/
(function($) {
  var DEFAULT_OPTIONS, debounce, forceFloat;

  DEFAULT_OPTIONS = {
    minFontSize: Number.NEGATIVE_INFINITY,
    maxFontSize: Number.POSITIVE_INFINITY,
    compressorScale: 10,
    preserveLineHeight: true,
    debounce: 100
  };
  forceFloat = function(value, fallback) {
    if (fallback == null) {
      fallback = 0;
    }
    value = parseFloat(value);
    if (isNaN(value)) {
      return fallback;
    } else {
      return value;
    }
  };
  debounce = function(fn, wait) {
    var result, timeout;

    timeout = null;
    result = null;
    return function() {
      var args, context, later;

      context = this;
      args = arguments;
      later = function() {
        timeout = null;
        return result = fn.apply(context, args);
      };
      clearTimeout(timeout);
      timeout = setTimeout(later, wait);
      return result;
    };
  };
  $.fn.fitText = function(compressor, options) {
    if (compressor == null) {
      compressor = 1;
    }
    if (options == null) {
      options = {};
    }
    options = $.extend({}, DEFAULT_OPTIONS, options);
    options.minFontSize = forceFloat(options.minFontSize, DEFAULT_OPTIONS.minFontSize);
    options.maxFontSize = forceFloat(options.maxFontSize, DEFAULT_OPTIONS.maxFontSize);
    compressor *= options.compressorScale;
    return this.each(function() {
      var $this, lineHeight, resizer;

      $this = $(this);
      lineHeight = forceFloat($this.css('line-height')) / forceFloat($this.css('font-size'));
      resizer = function() {
        var fontSize;

        fontSize = $this.width() / compressor;
        fontSize = Math.max(Math.min(fontSize, options.maxFontSize), options.minFontSize);
        $this.css('font-size', fontSize);
        if (options.preserveLineHeight && lineHeight > 0) {
          return $this.css('line-height', "" + (fontSize * lineHeight) + "px");
        }
      };
      $(window).on('resize.fitText', debounce(resizer, options.debounce));
      return resizer();
    });
  };
  return $(function() {
    return $('[data-fit-text]').each(function() {
      var $this, compressor, options;

      $this = $(this);
      compressor = $this.attr('data-fit-text') || 1;
      options = {
        minFontSize: $this.attr('data-min-font-size'),
        maxFontSize: $this.attr('data-max-font-size')
      };
      return $this.fitText(compressor, options);
    });
  });
})(jQuery);