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;
+    }
+}