<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * Contains Relation_Stats_Svg class
 *
 * @package PhpMyAdmin
 */
if (! defined('PHPMYADMIN')) {
	exit;
}

require_once 'libraries/plugins/schema/RelationStats.class.php';

/**
 * Relation preferences/statistics
 *
 * This class fetches the table master and foreign fields positions
 * and helps in generating the Table references and then connects
 * master table's master field to foreign table's foreign key
 * in SVG XML document.
 *
 * @package PhpMyAdmin
 * @name	Relation_Stats_Svg
 * @see		PMA_SVG::printElementLine
 */
class Relation_Stats_Svg extends RelationStats
{
	/**
	 * The "Relation_Stats_Svg" constructor
	 *
	 * @param string $master_table	The master table name
	 * @param string $master_field	The relation field in the master table
	 * @param string $foreign_table The foreign table name
	 * @param string $foreign_field The relation field in the foreign table
	 */
	function __construct($master_table, $master_field, $foreign_table,
		$foreign_field
	) {
		$this->wTick = 10;
		parent::__construct(
			$master_table, $master_field, $foreign_table, $foreign_field
		);
	}

	/**
	 * draws relation links and arrows shows foreign key relations
	 *
	 * @param boolean $showColor Whether to use one color per relation or not
	 *
	 * @global object $svg The current SVG image document
	 *
	 * @return void
	 * @access public
	 *
	 * @see PMA_SVG
	 */
	public function relationDraw($showColor)
	{
		global $svg;

		if ($showColor) {
			$listOfColors = array(
				'red',
				'grey',
				'black',
				'yellow',
				'green',
				'cyan',
				'	 orange'
			);
			shuffle($listOfColors);
			$color =  $listOfColors[0];
		} else {
			$color = 'black';
		}

		$svg->printElementLine(
			'line', $this->xSrc, $this->ySrc,
			$this->xSrc + $this->srcDir * $this->wTick, $this->ySrc,
			'fill:' . $color . ';stroke:black;stroke-width:2;'
		);
		$svg->printElementLine(
			'line', $this->xDest + $this->destDir * $this->wTick,
			$this->yDest, $this->xDest, $this->yDest,
			'fill:' . $color . ';stroke:black;stroke-width:2;'
		);
		$svg->printElementLine(
			'line', $this->xSrc + $this->srcDir * $this->wTick, $this->ySrc,
			$this->xDest + $this->destDir * $this->wTick, $this->yDest,
			'fill:' . $color . ';stroke:' . $color . ';stroke-width:1;'
		);
		$root2 = 2 * sqrt(2);
		$svg->printElementLine(
			'line', $this->xSrc + $this->srcDir * $this->wTick * 0.75, $this->ySrc,
			$this->xSrc + $this->srcDir * (0.75 - 1 / $root2) * $this->wTick,
			$this->ySrc + $this->wTick / $root2,
			'fill:' . $color . ';stroke:black;stroke-width:2;'
		);
		$svg->printElementLine(
			'line', $this->xSrc + $this->srcDir * $this->wTick * 0.75, $this->ySrc,
			$this->xSrc + $this->srcDir * (0.75 - 1 / $root2) * $this->wTick,
			$this->ySrc - $this->wTick / $root2,
			'fill:' . $color . ';stroke:black;stroke-width:2;'
		);
		$svg->printElementLine(
			'line', $this->xDest + $this->destDir * $this->wTick / 2, $this->yDest,
			$this->xDest + $this->destDir * (0.5 + 1 / $root2) * $this->wTick,
			$this->yDest + $this->wTick / $root2,
			'fill:' . $color . ';stroke:black;stroke-width:2;'
		);
		$svg->printElementLine(
			'line', $this->xDest + $this->destDir * $this->wTick / 2, $this->yDest,
			$this->xDest + $this->destDir * (0.5 + 1 / $root2) * $this->wTick,
			$this->yDest - $this->wTick / $root2,
			'fill:' . $color . ';stroke:black;stroke-width:2;'
		);
	}
}
?>