DZone Snippets: jsfromhell code

Replace working as PHP str_replace //JavaScript Function

jonasraoni (Jonas Raoni Soares Silva) — Thu, 17 Apr 2008 05:10:07 GMT

Useless JavaScript implementation of the php function str_replace.



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com



function replace(f, r, s){

	var ra = r instanceof Array, sa = s instanceof Array, l = (f = [].concat(f)).length, r = [].concat(r), i = (s = [].concat(s)).length;

	while(j = 0, i--)

		while(s[i] = s[i].split(f[j]).join(ra ? r[j] || "" : r[0]), ++j < l);

	return sa ? s : s[0];

}

Output JavaScript variables from PHP

jonasraoni (Jonas Raoni Soares Silva) — Wed, 09 Apr 2008 23:57:18 GMT

Class with useful static methods for outputting PHP values into JavaScript format.



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com



class JS{

	//generic and maybe not the desired results xD

	function value($o){

		if($o === null)

			return 'null';

		$t = strtolower(gettype($o));

		if($t == 'string' && is_numeric($o) && ($o[0] || strlen($o) == 1) || in_array($t, array('double', 'integer')))

			$t = 'number';

		elseif($t == 'string' && preg_match('@^\d{4}(?:-\d{1,2}){1,2}(?: (?:\d{1,2}:){2}\d{1,2})?$@', $o)) //strtotime works also with "strange" values strtotime('x')

			$t = 'date';

		elseif($t == 'array' && ($c = count($k = array_keys($o))) && $k !== range(0, $c - 1))

			$t = 'object';

		elseif(!in_array($t, array('boolean', 'string', 'array', 'object')))

			$t = 'string';

		$t = 'from' . $t;

		return self::$t($o);

	}

	function fromNumber($o){

		return +$o . '';

	}

	function fromObject($o){

		$r = array();

		foreach($o as $n => $v)

			$r[] = self::fromString($n) . ':' . self::value($v);

		return '{' . implode(',', $r) . '}';

	}

	function fromBoolean($o){

		return $o ? 'true' : 'false';

	}

	//$q = should quote? 

	//$c = char that will be used to quote

	function fromString($o, $q = true, $c = '"'){

		return ($p = $q ? $c : '') . preg_replace('/\r\n|\n\r|\r/', '\n', str_replace($c, '\\' . $c, str_replace('\\', '\\\\', $o))) . $p;

	}

	function fromArray($o){

		$s = '';

		foreach($o as $v)

			$s .= ($s ? ',' : '') . self::value($v);

		return '[' . $s . ']';

	}

	function fromDate($o){

		(is_numeric($o) && $o = +$o) || ($o = strtotime($o)) > 0 || ($o = mktime());

		$o = explode(',', date('Y,n,j,G,i,s', $o));

		foreach($o as $i => $v)

			$o[$i] = +$v;

		return 'new Date(' . implode(',', $o)  . ')';

	}

}

Example



$o = new stdClass;

$o->abc = 123;

echo implode("\n
", array(

	JS::value('1984-07-22 11:30:12'),

	JS::value('Test'),

	JS::value(1234),

	JS::value(true),

	JS::value(array(1,2,3)),

	JS::value(array('lala' => 'x')),

	JS::value($o)

));

Point Inside a Polygon //JavaScript Function

jonasraoni (Jonas Raoni Soares Silva) — Sun, 30 Mar 2008 16:57:56 GMT

Checks whether a point is inside a polygon.
Adapted from: [http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html]

[UPDATED CODE AND HELP CAN BE FOUND HERE: Point Inside a Polygon]



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com/classes/is-point-in-poly [v1.0]



function isPointInPoly(poly, pt){

	for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i)

		((poly[i].y <= pt.y && pt.y < poly[j].y) || (poly[j].y <= pt.y && pt.y < poly[i].y))

		&& (pt.x < (poly[j].x - poly[i].x) * (pt.y - poly[i].y) / (poly[j].y - poly[i].y) + poly[i].x)

		&& (c = !c);

	return c;

}

Example

UTF-8 Converter //JavaScript Object

jonasraoni (Jonas Raoni Soares Silva) — Sun, 30 Mar 2008 16:52:18 GMT

Converts a sequence of ANSI characters to UTF-8 and vice-versa.

[UPDATED CODE AND HELP CAN BE FOUND HERE]



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com/geral/utf-8 [v1.0]



UTF8 = {

	encode: function(s){

		for(var c, i = -1, l = (s = s.split("")).length, o = String.fromCharCode; ++i < l;

			s[i] = (c = s[i].charCodeAt(0)) >= 127 ? o(0xc0 | (c >>> 6)) + o(0x80 | (c & 0x3f)) : s[i]

		);

		return s.join("");

	},

	decode: function(s){

		for(var a, b, i = -1, l = (s = s.split("")).length, o = String.fromCharCode, c = "charCodeAt"; ++i < l;

			((a = s[i][c](0)) & 0x80) &&

			(s[i] = (a & 0xfc) == 0xc0 && ((b = s[i + 1][c](0)) & 0xc0) == 0x80 ?

			o(((a & 0x03) << 6) + (b & 0x3f)) : o(128), s[++i] = "")

		);

		return s.join("");

	}

};

Example



var s = "aáéíóúe";

document.write(

	('UTF8.encode("' + s + '") = ').bold(), UTF8.encode(s), "
",

	('UTF8.decode(UTF8.encode("' + s + '"))) = ').bold(), UTF8.decode(UTF8.encode(s))

);

TimeLine //JavaScript Class

jonasraoni (Jonas Raoni Soares Silva) — Sun, 30 Mar 2008 16:49:21 GMT

Simulates the Adobe Flash timeline. You define the amount of frames, the speed in fps (frames per second) and, at each frame passage an event is called, useful for animations.

[UPDATED CODE AND HELP CAN BE FOUND HERE]



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com/classes/timeline [v1.0]



TimeLine = function(fps, f){

	this.fps = fps, this.frames = f;

};

with({o: TimeLine, $: TimeLine.prototype}){

	o.timers = [];

	$.running = !!($.current = +(o.timer = $.time = null));

	o.run = function(){

		var o = this;

		o.timer || (o.timer = setInterval(function(){

			for(var h, d = +(new Date), t = o.timers, i = t.length; i--;){

				(!t[i].running || ((d - t[i].time) / (1e3 / t[i].fps) > t[i].current + 1 &&

				t[i].onframe(++t[i].current), t[i].current >= t[i].frames)) &&

				(h = t.splice(i, 1)[0], h.stop(1));

			}

		}, 1));

	};

	$.start = function(c){

		var o = this, t = TimeLine;

		if(o.running) return;

		o.running = true, o.current = c || 0;

		o.time = new Date, o.onstart && o.onstart();

		if(!o.onframe || o.frames <= 0 || o.fps <= 0)

			return o.stop(1);

		t.timers.push(this), t.run();

	};

	$.stop = function(){

		var o = this;

		o.running = false;

		if(!TimeLine.timers.length)

			TimeLine.timer = clearInterval(TimeLine.timer), null;

		arguments.length && o.onstop && o.onstop();

	};

}

Example





25 fps

12 fps



TimeLine working together with the ease in quad function.

Selection //JavaScript Class

jonasraoni (Jonas Raoni Soares Silva) — Sat, 06 Oct 2007 15:02:21 GMT

Retrieves and sets the cursor position, as well the selected text of inputs and textareas. After searching, I saw it's the only code which retrieves right information in textareas under Internet Explorer without damaging the "Ctrl+Z"

[UPDATED CODE AND HELP CAN BE FOUND HERE]



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com/forms/selection [v1.0]



Selection = function(input){

	this.isTA = (this.input = input).nodeName.toLowerCase() == "textarea";

};

with({o: Selection.prototype}){

	o.setCaret = function(start, end){

		var o = this.input;

		if(Selection.isStandard)

			o.setSelectionRange(start, end);

		else if(Selection.isSupported){

			var t = this.input.createTextRange();

			end -= start + o.value.slice(start + 1, end).split("\n").length - 1;

			start -= o.value.slice(0, start).split("\n").length - 1;

			t.move("character", start), t.moveEnd("character", end), t.select();

		}

	};

	o.getCaret = function(){

		var o = this.input, d = document;

		if(Selection.isStandard)

			return {start: o.selectionStart, end: o.selectionEnd};

		else if(Selection.isSupported){

			var s = (this.input.focus(), d.selection.createRange()), r, start, end, value;

			if(s.parentElement() != o)

				return {start: 0, end: 0};

			if(this.isTA ? (r = s.duplicate()).moveToElementText(o) : r = o.createTextRange(), !this.isTA)

				return r.setEndPoint("EndToStart", s), {start: r.text.length, end: r.text.length + s.text.length};

			for(var $ = "[###]"; (value = o.value).indexOf($) + 1; $ += $);

			r.setEndPoint("StartToEnd", s), r.text = $ + r.text, end = o.value.indexOf($);

			s.text = $, start = o.value.indexOf($);

			if(d.execCommand && d.queryCommandSupported("Undo"))

				for(r = 3; --r; d.execCommand("Undo"));

			return o.value = value, this.setCaret(start, end), {start: start, end: end};

		}

		return {start: 0, end: 0};

	};

	o.getText = function(){

		var o = this.getCaret();

		return this.input.value.slice(o.start, o.end);

	};

	o.setText = function(text){

		var o = this.getCaret(), i = this.input, s = i.value;

		i.value = s.slice(0, o.start) + text + s.slice(o.end);

		this.setCaret(o.start += text.length, o.start);

	};

	new function(){

		var d = document, o = d.createElement("input"), s = Selection;

		s.isStandard = "selectionStart" in o;

		s.isSupported = s.isStandard || (o = d.selection) && !!o.createRange();

	};

}

Example





	

		Selection Test

		<br />www.jsfromhell.com
<br />Jonas Carlos Lalala
<br />Bin Laden x Bush
<br />

CSV Parser / Writer for PHP

jonasraoni (Jonas Raoni Soares Silva) — Mon, 11 Dec 2006 22:36:10 GMT

CSV Parser / Writer

Example A:



//cell separator, row separator, value enclosure

$csv = new CSV(';', "\r\n", '"');



//parse the string content

$csv->setContent(file_get_contents('data.csv'));



//returns an array with the CSV data

print_r($csv->getArray());

Exemple B:



$csv = new CSV(';', "\r\n", '"');

//sets up the content through an array

$csv->setArray(

	array(

		array('col"una1', "colu\r\nna2"),

		array('col;una3', 'coluna4')

	)

);

//retorns string with the CSV representation

print $csv->getContent();



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com

class CSV{

	var $cellDelimiter;

	var $valueEnclosure;

	var $rowDelimiter;



	function CSV($cellDelimiter, $rowDelimiter, $valueEnclosure){

		$this->cellDelimiter = $cellDelimiter;

		$this->valueEnclosure = $valueEnclosure;

		$this->rowDelimiter = $rowDelimiter;

		$this->o = array();

	}

	function getArray(){

		return $this->o;

	}

	function setArray($o){

		$this->o = $o;

	}

	function getContent(){

		if(!(($bl = strlen($b = $this->rowDelimiter)) && ($dl = strlen($d = $this->cellDelimiter)) && ($ql = strlen($q = $this->valueEnclosure))))

			return '';

		for($o = $this->o, $i = -1; ++$i < count($o);){

			for($e = 0, $j = -1; ++$j < count($o[$i]);)

				(($e = strpos($o[$i][$j], $q) !== false) || strpos($o[$i][$j], $b) !== false || strpos($o[$i][$j], $d) !== false)

				&& $o[$i][$j] = $q . ($e ? str_replace($q, $q . $q, $o[$i][$j]) : $o[$i][$j]) . $q;

			$o[$i] = implode($d, $o[$i]);

		}

		return implode($b, $o);

	}

	function setContent($s){

		$this->o = array();

		if(!strlen($s))

			return true;

		if(!(($bl = strlen($b = $this->rowDelimiter)) && ($dl = strlen($d = $this->cellDelimiter)) && ($ql = strlen($q = $this->valueEnclosure))))

			return false;

		for($o = array(array('')), $this->o = &$o, $e = $r = $c = 0, $i = -1, $l = strlen($s); ++$i < $l;){

			if(!$e && substr($s, $i, $bl) == $b){

				$o[++$r][$c = 0] = '';

				$i += $bl - 1;

			}

			elseif(substr($s, $i, $ql) == $q){

				$e ? (substr($s, $i + $ql, $ql) == $q ?

				$o[$r][$c] .= substr($s, $i += $ql, $ql) : $e = 0)

				: (strlen($o[$r][$c]) == 0 ? $e = 1 : $o[$r][$c] .= substr($s, $i, $ql));

				$i += $ql - 1;

			}

			elseif(!$e && substr($s, $i, $dl) == $d){

				$o[$r][++$c] = '';

				$i += $dl - 1;

			}

			else

				$o[$r][$c] .= $s[$i];

		}

		return true;

	}

}

?>

ProbabilityRandom //PHP Class

jonasraoni (Jonas Raoni Soares Silva) — Sun, 20 Aug 2006 21:35:57 GMT

Class to return items based on their probability.

Updated version can be found here

usage



$prExample = new ProbabilityRandom;



$prExample->add( 'I have more chances than everybody :]', 30 );

$prExample->add( 'I have good chances', 10 );

$prExample->add( 'I\'m difficult to appear...', 1 );



for( $x=10; $x--; print $prExample->get() . '
' );



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com

class ProbabilityRandom {

	#private vars

	var

		$data = array(),

		$universe = 0;



	#add an item to the list and defines its probability of being chosen

	function add( $data, $probability ){

		$this->data[ $x = sizeof( $this->data ) ] = new stdClass;

		$this->data[ $x ]->value = $data;

		$this->universe += $this->data[ $x ]->probability = abs( $probability );

	}



	#remove an item from the list

	function remove( $index ){

		if( $index > -1 && $index < sizeof( $this->data ) ) {

			$item = array_splice( $this->data, $index, 1 );

			$this->universe -= $item->probability;

		}

	}



	#clears the class

	function clear(){

		$this->universe = sizeof( $this->data = array() );

	}



	#return a randomized item from the list

	function get(){

		if( !$this->universe )

			return null;

		$x = round( mt_rand( 0, $this->universe ) );

		$max = $i = 0;

		do

			$max += $this->data[ $i++ ]->probability;

		while( $x > $max );

		return $this->data[ $i-1 ]->value;

	}

}

Exception class fix for php 4 //PHP Class

jonasraoni (Jonas Raoni Soares Silva) — Sun, 20 Aug 2006 21:29:55 GMT



if(!class_exists('Exception')){

	class Exception{

		var $_message = '';

		var $_code = 0;

		var $_line = 0;

		var $_file = '';

		var $_trace = null;



		function Exception($message = 'Unknown exception', $code = 0){

			$this->_message = $message;

			$this->_code = $code;

			$this->_trace = debug_backtrace();

			$x = array_shift($this->_trace);

			$this->_file = $x['file'];

			$this->_line = $x['line'];

		}



		function __construct($message = 'Unknown exception', $code = 0){

			$this->Exception($message, $code);

		}



		function getMessage(){

			return $this->_message;

		}

		function getCode(){

			return $this->_code;

		}

		function getFile(){

			return $this->_file;

		}

		function getLine(){

			return $this->_line;

		}

		function getTrace(){

			return $this->_trace;

		}

		function getTraceAsString(){

			$s = '';

			foreach($this->_trace as $i=>$item){

				foreach($item['args'] as $j=>$arg)

					$item['args'][$j] = print_r($arg, true);

				$s .= "#$i " . (isset($item['class']) ? $item['class'] . $item['type'] : '') . $item['function']

				. '(' . implode(', ', $item['args']) . ") at [$item[file]:$item[line]]\n";

			}

			return $s;

		}

		function printStackTace(){

			echo $this->getTraceAsString();

		}

		function toString(){

			return $this->getMessage();

		}

		function __toString(){

			return $this->toString();

		}

	}

}

Response::redirect //PHP Function

jonasraoni (Jonas Raoni Soares Silva) — Sun, 20 Aug 2006 21:28:28 GMT



class Response{

	function redirect($url){

		exit(header('Location: ' . $url));

	}

}