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AS3 - trim text for specific width and heigh

/ Published in: ActionScript 3
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Hi;

Sometimes you need to "trim" textifield for specific height... This solves just this, perfect for news, news-readers, rss etc

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  1. package com.streameye.utils {
  2.  
  3. 	import flash.text.TextField;
  4.  
  5. 	public class TrimTextUtil {
  6.  
  7. 		public function TrimTextUtil() {
  8.  
  9. 		}
  10.  
  11. 		public static function trimTfForHeight(_tf:TextField, _height:Number = 0 ):void{
  12.  
  13. 			_tf.multiline = true;
  14. 			_tf.wordWrap = true;
  15. 			_tf.condenseWhite = true;
  16.  
  17. 			var heightNeeded:Number = _height != 0 ? _height : _tf.height;
  18.  
  19. 			if(_tf.textHeight > heightNeeded){			
  20.  
  21. 				var safeLinesNum:int = 0;
  22. 				var preciseFixer:int = 0;
  23. 				var safeTrim:Number = 0;
  24.  
  25. 				for(var i:Number = 0; i< _tf.numLines-1; i++){
  26. 					if(_tf.getLineMetrics(i).height*i + _tf.getLineMetrics(i).ascent < heightNeeded - preciseFixer){
  27. 						safeTrim += _tf.getLineLength(i);
  28. 						safeLinesNum++;
  29. 					}
  30. 				}
  31.  
  32. 				var suffix:String = " ...";
  33. 				_tf.text = truncate(_tf.text, safeTrim, suffix);
  34. 			}
  35.  
  36. 		}
  37.  
  38. 		public static function truncate(p_string:String, p_len:uint, p_suffix:String = "..."):String {
  39. 			if (p_string == null) {
  40. 				return '';
  41. 			}
  42. 			p_len -=  p_suffix.length;
  43. 			var trunc:String = p_string;
  44. 			if (trunc.length > p_len) {
  45. 				trunc = trunc.substr(0,p_len);
  46. 				if (/[^\s]/.test(p_string.charAt(p_len))) {
  47. 					trunc = (trunc.replace(/\w+$|\s+$/,'')).replace(/\s+$/, '');
  48. 				}
  49. 				trunc +=  p_suffix;
  50. 			}
  51. 			return trunc;			
  52. 		}
  53.  
  54. 		public static function stripTags(s_text:String):String{
  55. 			return s_text.replace(/<.*?>/g, "")
  56. 		}
  57.  
  58. 		////  ARRAYS
  59.  
  60. 		public static function chunks(array:Array, chunk_size:uint):Array {
  61. 			var chunks:Array = new Array();
  62. 			for (var i:int = 0; i < (array.length / chunk_size); i++) {
  63. 				chunks.push(array.slice(i * chunk_size, (i + 1) * chunk_size));
  64. 			}
  65. 			return chunks;
  66. 		}
  67.  
  68. 	}//end
  69. }

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