BCGcodabar.barcode.php
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<?php
/**
*--------------------------------------------------------------------
*
* Sub-Class - Codabar
*
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGParseException.php');
include_once('BCGBarcode1D.php');
class BCGcodabar extends BCGBarcode1D {
/**
* Constructor.
*/
public function __construct() {
parent::__construct();
$this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-', '$', ':', '/', '.', '+', 'A', 'B', 'C', 'D');
$this->code = array( // 0 added to add an extra space
'00000110', /* 0 */
'00001100', /* 1 */
'00010010', /* 2 */
'11000000', /* 3 */
'00100100', /* 4 */
'10000100', /* 5 */
'01000010', /* 6 */
'01001000', /* 7 */
'01100000', /* 8 */
'10010000', /* 9 */
'00011000', /* - */
'00110000', /* $ */
'10001010', /* : */
'10100010', /* / */
'10101000', /* . */
'00111110', /* + */
'00110100', /* A */
'01010010', /* B */
'00010110', /* C */
'00011100' /* D */
);
}
/**
* Parses the text before displaying it.
*
* @param mixed $text
*/
public function parse($text) {
parent::parse(strtoupper($text)); // Only Capital Letters are Allowed
}
/**
* Draws the barcode.
*
* @param resource $im
*/
public function draw($im) {
$c = strlen($this->text);
for ($i = 0; $i < $c; $i++) {
$this->drawChar($im, $this->findCode($this->text[$i]), true);
}
$this->drawText($im, 0, 0, $this->positionX, $this->thickness);
}
/**
* Returns the maximal size of a barcode.
*
* @param int $w
* @param int $h
* @return int[]
*/
public function getDimension($w, $h) {
$textLength = 0;
$c = strlen($this->text);
for ($i = 0; $i < $c; $i++) {
$index = $this->findIndex($this->text[$i]);
if ($index !== false) {
$textLength += 8;
$textLength += substr_count($this->code[$index], '1');
}
}
$w += $textLength;
$h += $this->thickness;
return parent::getDimension($w, $h);
}
/**
* Validates the input.
*/
protected function validate() {
$c = strlen($this->text);
if ($c === 0) {
throw new BCGParseException('codabar', 'No data has been entered.');
}
// Checking if all chars are allowed
for ($i = 0; $i < $c; $i++) {
if (array_search($this->text[$i], $this->keys) === false) {
throw new BCGParseException('codabar', 'The character \'' . $this->text[$i] . '\' is not allowed.');
}
}
// Must start by A, B, C or D
if ($c == 0 || ($this->text[0] !== 'A' && $this->text[0] !== 'B' && $this->text[0] !== 'C' && $this->text[0] !== 'D')) {
throw new BCGParseException('codabar', 'The text must start by the character A, B, C, or D.');
}
// Must end by A, B, C or D
$c2 = $c - 1;
if ($c2 === 0 || ($this->text[$c2] !== 'A' && $this->text[$c2] !== 'B' && $this->text[$c2] !== 'C' && $this->text[$c2] !== 'D')) {
throw new BCGParseException('codabar', 'The text must end by the character A, B, C, or D.');
}
parent::validate();
}
}
?>