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extend/barcode/class/BCGBarcode1D.php

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+<?php
+/**
+ *--------------------------------------------------------------------
+ *
+ * Holds all type of barcodes for 1D generation
+ *
+ *--------------------------------------------------------------------
+ * Copyright (C) Jean-Sebastien Goupil
+ * http://www.barcodephp.com
+ */
+include_once('BCGArgumentException.php');
+include_once('BCGBarcode.php');
+include_once('BCGFontPhp.php');
+include_once('BCGFontFile.php');
+include_once('BCGLabel.php');
+
+abstract class BCGBarcode1D extends BCGBarcode {
+    const SIZE_SPACING_FONT = 5;
+
+    const AUTO_LABEL = '##!!AUTO_LABEL!!##';
+
+    protected $thickness;       // int
+    protected $keys, $code;     // string[]
+    protected $positionX;       // int
+    protected $font;            // BCGFont
+    protected $text;            // string
+    protected $checksumValue;   // int or int[]
+    protected $displayChecksum; // bool
+    protected $label;           // string
+    protected $defaultLabel;    // BCGLabel
+
+    /**
+     * Constructor.
+     */
+    protected function __construct() {
+        parent::__construct();
+
+        $this->setThickness(30);
+
+        $this->defaultLabel = new BCGLabel();
+        $this->defaultLabel->setPosition(BCGLabel::POSITION_BOTTOM);
+        $this->setLabel(self::AUTO_LABEL);
+        $this->setFont(new BCGFontPhp(5));
+
+        $this->text = '';
+        $this->checksumValue = false;
+        $this->positionX = 0;
+    }
+
+    /**
+     * Gets the thickness.
+     *
+     * @return int
+     */
+    public function getThickness() {
+        return $this->thickness;
+    }
+
+    /**
+     * Sets the thickness.
+     *
+     * @param int $thickness
+     */
+    public function setThickness($thickness) {
+        $thickness = intval($thickness);
+        if ($thickness <= 0) {
+            throw new BCGArgumentException('The thickness must be larger than 0.', 'thickness');
+        }
+
+        $this->thickness = $thickness;
+    }
+
+    /**
+     * Gets the label.
+     * If the label was set to BCGBarcode1D::AUTO_LABEL, the label will display the value from the text parsed.
+     *
+     * @return string
+     */
+    public function getLabel() {
+        $label = $this->label;
+        if ($this->label === self::AUTO_LABEL) {
+            $label = $this->text;
+            if ($this->displayChecksum === true && ($checksum = $this->processChecksum()) !== false) {
+                $label .= $checksum;
+            }
+        }
+
+        return $label;
+    }
+
+    /**
+     * Sets the label.
+     * You can use BCGBarcode::AUTO_LABEL to have the label automatically written based on the parsed text.
+     *
+     * @param string $label
+     */
+    public function setLabel($label) {
+        $this->label = $label;
+    }
+
+    /**
+     * Gets the font.
+     *
+     * @return BCGFont
+     */
+    public function getFont() {
+        return $this->font;
+    }
+
+    /**
+     * Sets the font.
+     *
+     * @param mixed $font BCGFont or int
+     */
+    public function setFont($font) {
+        if (is_int($font)) {
+            if ($font === 0) {
+                $font = null;
+            } else {
+                $font = new BCGFontPhp($font);
+            }
+        }
+
+        $this->font = $font;
+    }
+
+    /**
+     * Parses the text before displaying it.
+     *
+     * @param mixed $text
+     */
+    public function parse($text) {
+        $this->text = $text;
+        $this->checksumValue = false; // Reset checksumValue
+        $this->validate();
+
+        parent::parse($text);
+
+        $this->addDefaultLabel();
+    }
+
+    /**
+     * Gets the checksum of a Barcode.
+     * If no checksum is available, return FALSE.
+     *
+     * @return string
+     */
+    public function getChecksum() {
+        return $this->processChecksum();
+    }
+
+    /**
+     * Sets if the checksum is displayed with the label or not.
+     * The checksum must be activated in some case to make this variable effective.
+     *
+     * @param boolean $displayChecksum
+     */
+    public function setDisplayChecksum($displayChecksum) {
+        $this->displayChecksum = (bool)$displayChecksum;
+    }
+
+    /**
+     * Adds the default label.
+     */
+    protected function addDefaultLabel() {
+        $label = $this->getLabel();
+        $font = $this->font;
+        if ($label !== null && $label !== '' && $font !== null && $this->defaultLabel !== null) {
+            $this->defaultLabel->setText($label);
+            $this->defaultLabel->setFont($font);
+            $this->addLabel($this->defaultLabel);
+        }
+    }
+
+    /**
+     * Validates the input
+     */
+    protected function validate() {
+        // No validation in the abstract class.
+    }
+
+    /**
+     * Returns the index in $keys (useful for checksum).
+     *
+     * @param mixed $var
+     * @return mixed
+     */
+    protected function findIndex($var) {
+        return array_search($var, $this->keys);
+    }
+
+    /**
+     * Returns the code of the char (useful for drawing bars).
+     *
+     * @param mixed $var
+     * @return string
+     */
+    protected function findCode($var) {
+        return $this->code[$this->findIndex($var)];
+    }
+
+    /**
+     * Draws all chars thanks to $code. If $startBar is true, the line begins by a space.
+     * If $startBar is false, the line begins by a bar.
+     *
+     * @param resource $im
+     * @param string $code
+     * @param boolean $startBar
+     */
+    protected function drawChar($im, $code, $startBar = true) {
+        $colors = array(BCGBarcode::COLOR_FG, BCGBarcode::COLOR_BG);
+        $currentColor = $startBar ? 0 : 1;
+        $c = strlen($code);
+        for ($i = 0; $i < $c; $i++) {
+            for ($j = 0; $j < intval($code[$i]) + 1; $j++) {
+                $this->drawSingleBar($im, $colors[$currentColor]);
+                $this->nextX();
+            }
+
+            $currentColor = ($currentColor + 1) % 2;
+        }
+    }
+
+    /**
+     * Draws a Bar of $color depending of the resolution.
+     *
+     * @param resource $img
+     * @param int $color
+     */
+    protected function drawSingleBar($im, $color) {
+        $this->drawFilledRectangle($im, $this->positionX, 0, $this->positionX, $this->thickness - 1, $color);
+    }
+
+    /**
+     * Moving the pointer right to write a bar.
+     */
+    protected function nextX() {
+        $this->positionX++;
+    }
+
+    /**
+     * Method that saves FALSE into the checksumValue. This means no checksum
+     * but this method should be overriden when needed.
+     */
+    protected function calculateChecksum() {
+        $this->checksumValue = false;
+    }
+
+    /**
+     * Returns FALSE because there is no checksum. This method should be
+     * overriden to return correctly the checksum in string with checksumValue.
+     *
+     * @return string
+     */
+    protected function processChecksum() {
+        return false;
+    }
+}
+?>