* * * setAttribute('viewBox', $offsetLeft . ' ' . $offsetTop . ' ' . $newWidth . ' ' . $newHeight); $outerSvgElement->setAttribute('width', (string)$imageDimension->getWidth()); $outerSvgElement->setAttribute('height', (string)$imageDimension->getHeight()); // Possibly prevent some attributes on the "inner svg" (original input) and transport them // to the new root (outerSvgElement). Currently only 'preserveAspectRatio'. if ($originalSvg->documentElement->getAttribute('preserveAspectRatio') != '') { $outerSvgElement->setAttribute('preserveAspectRatio', $originalSvg->documentElement->getAttribute('preserveAspectRatio')); } // To enable some debugging for embeddding the original determined dimensions into the SVG, use: // $outerSvgElement->setAttribute('data-inherit-width', (string)$dimensions['determined']['width']); // $outerSvgElement->setAttribute('data-inherit-height', (string)$dimensions['determined']['height']); // Attach the main source SVG element into our proxy SVG element. $innerSvgElement = $processedSvg->importNode($originalSvg->documentElement, true); // Stitch together the wrapper plus the old root element plus children, // so that $processedSvg contains the full XML tree $outerSvgElement->appendChild($innerSvgElement); $processedSvg->appendChild($outerSvgElement); return $processedSvg; } /** * Ensure that the determined width and height settings are attributes on the original . * If those were missing, cropping could not successfully be applied when getting * embedded and adjusted within a element. * * Returns true, if the determined width/height has been injected into the main */ protected function adjustSvgDimensions(\DOMDocument $originalSvg, array $determinedDimensions): bool { $isAltered = false; if ($determinedDimensions['original']['width'] === '') { $originalSvg->documentElement->setAttribute('width', $determinedDimensions['determined']['width']); $originalSvg->documentElement->setAttribute('data-manipulated-width', 'true'); $isAltered = true; } if ($determinedDimensions['original']['height'] === '') { $originalSvg->documentElement->setAttribute('height', $determinedDimensions['determined']['height']); $originalSvg->documentElement->setAttribute('data-manipulated-height', 'true'); $isAltered = true; } return $isAltered; } /** * Check an input SVG element for its dimensions through * width/height/viewBox attributes. * * Returns an array with the determined width/height. */ protected function determineSvgDimensions(\DOMDocument $originalSvg): array { // A default used when SVG neither uses width, height nor viewBox // Files falling back to this are probably broken. $width = $height = null; $originalSvgViewBox = $originalSvg->documentElement->getAttribute('viewBox'); $originalSvgWidth = $originalSvg->documentElement->getAttribute('width'); $originalSvgHeight = $originalSvg->documentElement->getAttribute('height'); // width/height can easily be used if they are numeric. Else, viewBox attribute dimensions // are evaluated. These are used as better fallback here, overridden if width/height exist. if ($originalSvgViewBox !== '') { $viewBoxParts = explode(' ', $originalSvgViewBox); if (isset($viewBoxParts[2]) && is_numeric($viewBoxParts[2])) { $width = $viewBoxParts[2]; } if (isset($viewBoxParts[3]) && is_numeric($viewBoxParts[3])) { $height = $viewBoxParts[3]; } } // width/height may contain percentages or units like "mm", "cm" // When non-numeric, we only use the width/height when no viewBox // exists (because the size of a viewBox would be preferred // to a non-numeric value), and then unify the unit as "1". if ($originalSvgWidth !== '') { if (is_numeric($originalSvgWidth)) { $width = $originalSvgWidth; } elseif ($width === null) { // contains a unit like "cm", "mm", "%", ... // Currently just stripped because without knowing the output // device, no pixel size can be calculated (missing dpi). // So we regard the unit to be "1" - this is how TYPO3 // already did it when SVG file metadata was evaluated (before // cropping). $width = (int)$originalSvgWidth; } } if ($originalSvgHeight !== '') { if (is_numeric($originalSvgHeight)) { $height = $originalSvgHeight; } elseif ($height === null) { $height = (int)$originalSvgHeight; } } return [ // The "proper" image dimensions (with viewBox preference) 'determined' => [ 'width' => $width ?? $this->defaultSvgDimension, 'height' => $height ?? $this->defaultSvgDimension, ], // Possible original "width/height" attributes (may not correlate with the viewBox, could be empty) 'original' => [ 'width' => $originalSvgWidth, 'height' => $originalSvgHeight, ], ]; } }