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Diffstat (limited to '')
-rw-r--r-- | library/Icinga/Chart/Primitive/Path.php | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/library/Icinga/Chart/Primitive/Path.php b/library/Icinga/Chart/Primitive/Path.php new file mode 100644 index 0000000..b9d5f7b --- /dev/null +++ b/library/Icinga/Chart/Primitive/Path.php @@ -0,0 +1,187 @@ +<?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; + } +} |