<?php
/*
SVG to dojox.gfx Parser
Copyright (C) 2009  Aaron Lindsay <aclindsay@aclindsay.com>

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

class Element {
	private $id;
	private $styles;
	private $transforms;
	private $transform;
	
	public function __construct() {
		$this->id = "";
		$this->styles = array();
		$this->transforms = array();
		$this->transform = new Transform();
	}
	
	public function setId($newId) {
		$this->id = $newId;
	}
	public function getId() {
		return $this->id;
	}
	
	public function setStyles($newStyles) {
		$this->styles = array();
		$smallerStyles = split(";", $newStyles);
		foreach($smallerStyles as $small) {
			$parts = split(":", $small);
			$this->styles[$parts[0]] = $parts[1];
		}
	}
	public function setStyle($key, $style) {
		$this->styles[$key] = $style;
	}
	public function getStyles() {
		return $this->styles;
	}
	public function getStyle($key) {
		if ($this->styles && array_key_exists($key, $this->styles))
			return $this->styles[$key];
		else
			return null;
	}
	public function setStroke($stroke) {
		$this->styles["stroke"] = $stroke;
	}
	public function setStrokeWidth($width) {
		$this->styles["stroke-width"] = $width;
	}
	public function setStrokeLinecap($linecap) {
		$this->styles["stroke-linecap"] = $linecap;
	}

	public function setFill($fill) {
		$this->styles["fill"] = $fill;
	}

	//$transform is a string of transformations
	public function setTransforms($transform) {
		$this->transforms = array();
		$this->addTransforms($transform);
		$this->combineTransforms();
	}
	
	//$transform is a string of transformations
	public function addTransforms($transform) {
		$parts = split("\\)", $transform);
		foreach ($parts as $part) {
			//because ')' is the last character, we'll get an empty string here if we don't watch out
			if ($part == "")
				break;
				
			$transform = split("\\(", trim($part));
			switch (trim($transform[0])) {
				case "matrix":
					//get all the matrix elements, create a new transform and set them
					$elements = split("[[:blank:],]+", trim($transform[1]));
					$transformObject = new Transform();
					$transformObject->setFullMatrix($elements[0], $elements[1], $elements[2], $elements[3], $elements[4], $elements[5]);
					$this->transforms[] = $transformObject;
					break;
				case "translate":
					//get all the matrix elements, create a new translate transform and set them
					$elements = split("[[:blank:],]+", trim($transform[1]));
					$transformObject = new Transform();
					$transformObject->setTranslate($elements[0], $elements[1]);
					$this->transforms[] = $transformObject;
					break;
				case "scale":
					//get all the matrix elements, create a new scale transform and set them
					$elements = split("[[:blank:],]+", trim($transform[1]));
					$transformObject = new Transform();
					if (count($elements) > 1)
						$transformObject->setScale($elements[0], $elements[1]);
					else
						$transformObject->setScale($elements[0]);
					$this->transforms[] = $transformObject;
					break;
				case "rotate":
					//get all the matrix elements, create a new rotate transform and set them
					$elements = split("[[:blank:],]+", trim($transform[1]));
					//if there are 3 arguments, they are angle, and (x,y) coordinates of the point to rotate about
					//to handle this, we translate, rotate, and translate back
					if (count($elements) >= 3) {
						$transformObject1 = new Transform();
						$transformObject1->setTranslate(-$elements[1], -$elements[2]);
						$this->transforms[] = $transformObject1;
						
						$transformObject2 = new Transform();
						$transformObject2->setRotate($elements[0]);
						$this->transforms[] = $transformObject2;
						
						$transformObject3 = new Transform();
						$transformObject3->setTranslate($elements[1], $elements[2]);
						$this->transforms[] = $transformObject3;
					} else {
						$transformObject = new Transform();
						$transformObject->setRotate($elements[0]);
						$this->transforms[] = $transformObject;
					}
					break;
				case "skewX":
					//get all the matrix elements, create a new skew transform and set them
					$elements = split("[[:blank:],]+", trim($transform[1]));
					$transformObject = new Transform();
					$transformObject->setSkewX($elements[0]);
					$this->transforms[] = $transformObject;
					break;
				case "skewY":
					//get all the matrix elements, create a new skew transform and set them
					$elements = split("[[:blank:],]+", trim($transform[1]));
					$transformObject = new Transform();
					$transformObject->setSkewY($elements[0]);
					$this->transforms[] = $transformObject;
					break;
			} 
		}
		//combine all these into one transform
		$this->combineTransforms();
	}
	

	//combine all transforms into one transform and store in $this->transform
	private function combineTransforms() {
		$one = new Transform();
		foreach ($this->transforms as $transform)
			$one->multiplyBy($transform);
		$this->transform = $one;
	}

	public function setTransform($transform) {
		$this->transform = $transform;
		$this->transforms = array();
		$this->transforms[] = $transform;
	}

	public function getTransform() {
		return $this->transform;
	}

	//an ARRAY of Transform objects is returned
	public function getTransforms() {
		return $this->transforms;
	}
}
?>