145 lines
3.4 KiB
PHP
145 lines
3.4 KiB
PHP
<?php
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// {{{ICINGA_LICENSE_HEADER}}}
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// {{{ICINGA_LICENSE_HEADER}}}
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namespace Icinga\Chart;
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use DOMNode;
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use DOMElement;
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use DOMDocument;
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use DOMImplementation;
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use Icinga\Chart\Render\LayoutBox;
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use Icinga\Chart\Render\RenderContext;
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use Icinga\Chart\Primitive\Canvas;
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/**
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* SVG Renderer component.
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*
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* Creates the basic DOM tree of the SVG to use
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*/
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class SVGRenderer
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{
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/**
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* The XML-document
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*
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* @var DOMDocument
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*/
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private $document;
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/**
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* The SVG-element
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*
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* @var DOMNode
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*/
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private $svg;
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/**
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* The root layer for all elements
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*
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* @var Canvas
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*/
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private $rootCanvas;
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/**
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* The width of this renderer
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*
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* @var int
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*/
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private $width = 100;
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/**
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* The height of this renderer
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*
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* @var int
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*/
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private $height = 100;
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/**
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* Create the root document and the SVG root node
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*/
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private function createRootDocument()
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{
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$implementation = new DOMImplementation();
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$docType = $implementation->createDocumentType(
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'svg',
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'-//W3C//DTD SVG 1.1//EN',
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'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd'
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);
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$this->document = $implementation->createDocument(null, null, $docType);
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$this->svg = $this->createOuterBox();
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$this->document->appendChild($this->svg);
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}
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/**
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* Create the outer SVG box containing the root svg element and namespace and return it
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*
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* @return DOMElement The SVG root node
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*/
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private function createOuterBox()
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{
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$ctx = $this->createRenderContext();
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$svg = $this->document->createElement('svg');
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$svg->setAttribute('xmlns', 'http://www.w3.org/2000/svg');
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$svg->setAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
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$svg->setAttribute('width', $this->width . '%');
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$svg->setAttribute('height', $this->height . '%');
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$svg->setAttribute(
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'viewBox',
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sprintf(
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'0 0 %s %s',
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$ctx->getNrOfUnitsX(),
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$ctx->getNrOfUnitsY()
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)
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);
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return $svg;
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}
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/**
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* Initialises the XML-document, SVG-element and this figure's root canvas
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*
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* @param int $width The width ratio
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* @param int $height The height ratio
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*/
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public function __construct($width, $height)
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{
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$this->width = $width;
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$this->height = $height;
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$this->rootCanvas = new Canvas('root', new LayoutBox(0, 0));
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}
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/**
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* Render the SVG-document
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*
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* @return string The resulting XML structure
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*/
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public function render()
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{
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$this->createRootDocument();
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$ctx = $this->createRenderContext();
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$this->svg->appendChild($this->rootCanvas->toSvg($ctx));
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$this->document->formatOutput = true;
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return $this->document->saveXML();
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}
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/**
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* Create a render context that will be used for rendering elements
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*
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* @return RenderContext The created RenderContext instance
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*/
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public function createRenderContext()
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{
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return new RenderContext($this->document, $this->width, $this->height);
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}
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/**
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* Return the root canvas of this rendered
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*
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* @return Canvas The canvas that will be the uppermost element in this figure
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*/
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public function getCanvas()
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{
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return $this->rootCanvas;
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}
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}
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