<?php

/**
 * @package php-svg-lib
 * @link    http://github.com/PhenX/php-svg-lib
 * @author  Fabien Ménager <fabien.menager@gmail.com>
 * @license GNU LGPLv3+ http://www.gnu.org/copyleft/lesser.html
 */
namespace DynamicOOOS\Svg;

use DynamicOOOS\Svg\Surface\SurfaceInterface;
use DynamicOOOS\Svg\Tag\AbstractTag;
use DynamicOOOS\Svg\Tag\Anchor;
use DynamicOOOS\Svg\Tag\Circle;
use DynamicOOOS\Svg\Tag\Ellipse;
use DynamicOOOS\Svg\Tag\Group;
use DynamicOOOS\Svg\Tag\ClipPath;
use DynamicOOOS\Svg\Tag\Image;
use DynamicOOOS\Svg\Tag\Line;
use DynamicOOOS\Svg\Tag\LinearGradient;
use DynamicOOOS\Svg\Tag\Path;
use DynamicOOOS\Svg\Tag\Polygon;
use DynamicOOOS\Svg\Tag\Polyline;
use DynamicOOOS\Svg\Tag\Rect;
use DynamicOOOS\Svg\Tag\Stop;
use DynamicOOOS\Svg\Tag\Text;
use DynamicOOOS\Svg\Tag\StyleTag;
use DynamicOOOS\Svg\Tag\UseTag;
class Document extends AbstractTag
{
    protected $filename;
    public $inDefs = \false;
    protected $x;
    protected $y;
    protected $width;
    protected $height;
    protected $subPathInit;
    protected $pathBBox;
    protected $viewBox;
    /** @var resource */
    protected $parser;
    /** @var SurfaceInterface */
    protected $surface;
    /** @var AbstractTag[] */
    protected $stack = array();
    /** @var AbstractTag[] */
    protected $defs = array();
    /** @var \Sabberworm\CSS\CSSList\Document[] */
    protected $styleSheets = array();
    public function loadFile($filename)
    {
        $this->filename = $filename;
    }
    protected function initParser()
    {
        $parser = \xml_parser_create("utf-8");
        \xml_parser_set_option($parser, \XML_OPTION_CASE_FOLDING, \false);
        \xml_set_element_handler($parser, array($this, "_tagStart"), array($this, "_tagEnd"));
        \xml_set_character_data_handler($parser, array($this, "_charData"));
        return $this->parser = $parser;
    }
    public function __construct()
    {
    }
    /**
     * @return SurfaceInterface
     */
    public function getSurface()
    {
        return $this->surface;
    }
    public function getStack()
    {
        return $this->stack;
    }
    public function getWidth()
    {
        return $this->width;
    }
    public function getHeight()
    {
        return $this->height;
    }
    public function getDimensions()
    {
        $rootAttributes = null;
        $parser = \xml_parser_create("utf-8");
        \xml_parser_set_option($parser, \XML_OPTION_CASE_FOLDING, \false);
        \xml_set_element_handler($parser, function ($parser, $name, $attributes) use(&$rootAttributes) {
            if ($name === "svg" && $rootAttributes === null) {
                $attributes = \array_change_key_case($attributes, \CASE_LOWER);
                $rootAttributes = $attributes;
            }
        }, function ($parser, $name) {
        });
        $fp = \fopen($this->filename, "r");
        while ($line = \fread($fp, 8192)) {
            \xml_parse($parser, $line, \false);
            if ($rootAttributes !== null) {
                break;
            }
        }
        \xml_parser_free($parser);
        return $this->handleSizeAttributes($rootAttributes);
    }
    public function handleSizeAttributes($attributes)
    {
        if ($this->width === null) {
            if (isset($attributes["width"])) {
                $width = Style::convertSize($attributes["width"], 400);
                $this->width = $width;
            }
            if (isset($attributes["height"])) {
                $height = Style::convertSize($attributes["height"], 300);
                $this->height = $height;
            }
            if (isset($attributes['viewbox'])) {
                $viewBox = \preg_split('/[\\s,]+/is', \trim($attributes['viewbox']));
                if (\count($viewBox) == 4) {
                    $this->x = $viewBox[0];
                    $this->y = $viewBox[1];
                    if (!$this->width) {
                        $this->width = $viewBox[2];
                    }
                    if (!$this->height) {
                        $this->height = $viewBox[3];
                    }
                }
            }
        }
        return array(0 => $this->width, 1 => $this->height, "width" => $this->width, "height" => $this->height);
    }
    public function getDocument()
    {
        return $this;
    }
    /**
     * Append a style sheet
     *
     * @param \Sabberworm\CSS\CSSList\Document $stylesheet
     */
    public function appendStyleSheet($stylesheet)
    {
        $this->styleSheets[] = $stylesheet;
    }
    /**
     * Get the document style sheets
     *
     * @return \Sabberworm\CSS\CSSList\Document[]
     */
    public function getStyleSheets()
    {
        return $this->styleSheets;
    }
    protected function before($attributes)
    {
        $surface = $this->getSurface();
        $style = new DefaultStyle();
        $style->inherit($this);
        $style->fromAttributes($attributes);
        $this->setStyle($style);
        $surface->setStyle($style);
    }
    public function render(SurfaceInterface $surface)
    {
        $this->inDefs = \false;
        $this->surface = $surface;
        $parser = $this->initParser();
        if ($this->x || $this->y) {
            $surface->translate(-$this->x, -$this->y);
        }
        $fp = \fopen($this->filename, "r");
        while ($line = \fread($fp, 8192)) {
            \xml_parse($parser, $line, \false);
        }
        \xml_parse($parser, "", \true);
        \xml_parser_free($parser);
    }
    protected function svgOffset($attributes)
    {
        $this->attributes = $attributes;
        $this->handleSizeAttributes($attributes);
    }
    public function getDef($id)
    {
        $id = \ltrim($id, "#");
        return isset($this->defs[$id]) ? $this->defs[$id] : null;
    }
    private function _tagStart($parser, $name, $attributes)
    {
        $this->x = 0;
        $this->y = 0;
        $tag = null;
        $attributes = \array_change_key_case($attributes, \CASE_LOWER);
        switch (\strtolower($name)) {
            case 'defs':
                $this->inDefs = \true;
                return;
            case 'svg':
                if (\count($this->attributes)) {
                    $tag = new Group($this, $name);
                } else {
                    $tag = $this;
                    $this->svgOffset($attributes);
                }
                break;
            case 'path':
                $tag = new Path($this, $name);
                break;
            case 'rect':
                $tag = new Rect($this, $name);
                break;
            case 'circle':
                $tag = new Circle($this, $name);
                break;
            case 'ellipse':
                $tag = new Ellipse($this, $name);
                break;
            case 'image':
                $tag = new Image($this, $name);
                break;
            case 'line':
                $tag = new Line($this, $name);
                break;
            case 'polyline':
                $tag = new Polyline($this, $name);
                break;
            case 'polygon':
                $tag = new Polygon($this, $name);
                break;
            case 'lineargradient':
                $tag = new LinearGradient($this, $name);
                break;
            case 'radialgradient':
                $tag = new LinearGradient($this, $name);
                break;
            case 'stop':
                $tag = new Stop($this, $name);
                break;
            case 'style':
                $tag = new StyleTag($this, $name);
                break;
            case 'a':
                $tag = new Anchor($this, $name);
                break;
            case 'g':
            case 'symbol':
                $tag = new Group($this, $name);
                break;
            case 'clippath':
                $tag = new ClipPath($this, $name);
                break;
            case 'use':
                $tag = new UseTag($this, $name);
                break;
            case 'text':
                $tag = new Text($this, $name);
                break;
            case 'desc':
                return;
        }
        if ($tag) {
            if (isset($attributes["id"])) {
                $this->defs[$attributes["id"]] = $tag;
            } else {
                /** @var AbstractTag $top */
                $top = \end($this->stack);
                if ($top && $top != $tag) {
                    $top->children[] = $tag;
                }
            }
            $this->stack[] = $tag;
            $tag->handle($attributes);
        }
    }
    function _charData($parser, $data)
    {
        $stack_top = \end($this->stack);
        if ($stack_top instanceof Text || $stack_top instanceof StyleTag) {
            $stack_top->appendText($data);
        }
    }
    function _tagEnd($parser, $name)
    {
        /** @var AbstractTag $tag */
        $tag = null;
        switch (\strtolower($name)) {
            case 'defs':
                $this->inDefs = \false;
                return;
            case 'svg':
            case 'path':
            case 'rect':
            case 'circle':
            case 'ellipse':
            case 'image':
            case 'line':
            case 'polyline':
            case 'polygon':
            case 'radialgradient':
            case 'lineargradient':
            case 'stop':
            case 'style':
            case 'text':
            case 'g':
            case 'symbol':
            case 'clippath':
            case 'use':
            case 'a':
                $tag = \array_pop($this->stack);
                break;
        }
        if (!$this->inDefs && $tag) {
            $tag->handleEnd();
        }
    }
}
