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<?php
/* Icinga Web 2 | (c) 2013 Icinga Development Team | GPLv2+ */
namespace Icinga\Chart\Primitive;
use DOMDocument;
use DOMElement;
use Icinga\Chart\Render\RenderContext;
use Icinga\Chart\Format;
/**
* Drawable for creating a svg path element
*/
class Path extends Styleable implements Drawable
{
/**
* Syntax template for moving
*
* @see http://www.w3.org/TR/SVG/paths.html#PathDataMovetoCommands
*/
const TPL_MOVE = 'M %s %s ';
/**
* Syntax template for bezier curve
*
* @see http://www.w3.org/TR/SVG/paths.html#PathDataCubicBezierCommands
*/
const TPL_BEZIER = 'S %s %s ';
/**
* Syntax template for straight lines
*
* @see http://www.w3.org/TR/SVG/paths.html#PathDataLinetoCommands
*/
const TPL_STRAIGHT = 'L %s %s ';
/**
* The default stroke width
*
* @var int
*/
public $strokeWidth = 1;
/**
* True to treat coordinates as absolute values
*
* @var bool
*/
protected $isAbsolute = false;
/**
* The points to draw, in the order they are drawn
*
* @var array
*/
protected $points = array();
/**
* True to draw the path discrete, i.e. make hard steps between points
*
* @var bool
*/
protected $discrete = false;
/**
* Create the path using the given points
*
* @param array $points Either a single [x, y] point or an array of x, y points
*/
public function __construct(array $points)
{
$this->append($points);
}
/**
* Append a single point or an array of points to this path
*
* @param array $points Either a single [x, y] point or an array of x, y points
*
* @return $this Fluid interface
*/
public function append(array $points)
{
if (count($points) === 0) {
return $this;
}
if (!is_array($points[0])) {
$points = array($points);
}
$this->points = array_merge($this->points, $points);
return $this;
}
/**
* Prepend a single point or an array of points to this path
*
* @param array $points Either a single [x, y] point or an array of x, y points
*
* @return $this Fluid interface
*/
public function prepend(array $points)
{
if (count($points) === 0) {
return $this;
}
if (!is_array($points[0])) {
$points = array($points);
}
$this->points = array_merge($points, $this->points);
return $this;
}
/**
* Set this path to be discrete
*
* @param boolean $bool True to draw discrete or false to draw straight lines between points
*
* @return $this Fluid interface
*/
public function setDiscrete($bool)
{
$this->discrete = $bool;
return $this;
}
/**
* Mark this path as containing absolute coordinates
*
* @return $this Fluid interface
*/
public function toAbsolute()
{
$this->isAbsolute = true;
return $this;
}
/**
* Create the SVG representation from this Drawable
*
* @param RenderContext $ctx The context to use for rendering
* @return DOMElement The SVG Element
*/
public function toSvg(RenderContext $ctx)
{
$doc = $ctx->getDocument();
$group = $doc->createElement('g');
$pathDescription = '';
$tpl = self::TPL_MOVE;
$lastPoint = null;
foreach ($this->points as $point) {
if (!$this->isAbsolute) {
$point = $ctx->toAbsolute($point[0], $point[1]);
}
$point[0] = Format::formatSVGNumber($point[0]);
$point[1] = Format::formatSVGNumber($point[1]);
if ($lastPoint && $this->discrete) {
$pathDescription .= sprintf($tpl, $point[0], $lastPoint[1]);
}
$pathDescription .= vsprintf($tpl, $point);
$lastPoint = $point;
$tpl = self::TPL_STRAIGHT;
}
$path = $doc->createElement('path');
$id = $this->id ?? uniqid('path-');
$path->setAttribute('id', $id);
$this->setId($id);
$path->setAttribute('d', $pathDescription);
$this->applyAttributes($path);
$style = new DOMDocument();
$style->loadHTML($this->getStyle());
$path->appendChild(
$path->ownerDocument->importNode(
$style->getElementsByTagName('style')->item(0),
true
)
);
$group->appendChild($path);
return $group;
}
}
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