diff options
Diffstat (limited to 'apps/theming/lib/IconBuilder.php')
| -rw-r--r-- | apps/theming/lib/IconBuilder.php | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/apps/theming/lib/IconBuilder.php b/apps/theming/lib/IconBuilder.php new file mode 100644 index 00000000000..63f4559970d --- /dev/null +++ b/apps/theming/lib/IconBuilder.php @@ -0,0 +1,208 @@ +<?php + +/** + * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors + * SPDX-License-Identifier: AGPL-3.0-or-later + */ +namespace OCA\Theming; + +use Imagick; +use ImagickPixel; +use OCP\Files\SimpleFS\ISimpleFile; + +class IconBuilder { + /** + * IconBuilder constructor. + * + * @param ThemingDefaults $themingDefaults + * @param Util $util + * @param ImageManager $imageManager + */ + public function __construct( + private ThemingDefaults $themingDefaults, + private Util $util, + private ImageManager $imageManager, + ) { + } + + /** + * @param $app string app name + * @return string|false image blob + */ + public function getFavicon($app) { + if (!$this->imageManager->shouldReplaceIcons()) { + return false; + } + try { + $favicon = new Imagick(); + $favicon->setFormat('ico'); + $icon = $this->renderAppIcon($app, 128); + if ($icon === false) { + return false; + } + $icon->setImageFormat('png32'); + + $clone = clone $icon; + $clone->scaleImage(16, 0); + $favicon->addImage($clone); + + $clone = clone $icon; + $clone->scaleImage(32, 0); + $favicon->addImage($clone); + + $clone = clone $icon; + $clone->scaleImage(64, 0); + $favicon->addImage($clone); + + $clone = clone $icon; + $clone->scaleImage(128, 0); + $favicon->addImage($clone); + + $data = $favicon->getImagesBlob(); + $favicon->destroy(); + $icon->destroy(); + $clone->destroy(); + return $data; + } catch (\ImagickException $e) { + return false; + } + } + + /** + * @param $app string app name + * @return string|false image blob + */ + public function getTouchIcon($app) { + try { + $icon = $this->renderAppIcon($app, 512); + if ($icon === false) { + return false; + } + $icon->setImageFormat('png32'); + $data = $icon->getImageBlob(); + $icon->destroy(); + return $data; + } catch (\ImagickException $e) { + return false; + } + } + + /** + * Render app icon on themed background color + * fallback to logo + * + * @param string $app app name + * @param int $size size of the icon in px + * @return Imagick|false + */ + public function renderAppIcon($app, $size) { + $appIcon = $this->util->getAppIcon($app); + if ($appIcon instanceof ISimpleFile) { + $appIconContent = $appIcon->getContent(); + $mime = $appIcon->getMimeType(); + } elseif (!file_exists($appIcon)) { + return false; + } else { + $appIconContent = file_get_contents($appIcon); + $mime = mime_content_type($appIcon); + } + + if ($appIconContent === false || $appIconContent === '') { + return false; + } + + $color = $this->themingDefaults->getColorPrimary(); + + // generate background image with rounded corners + $cornerRadius = 0.2 * $size; + $background = '<?xml version="1.0" encoding="UTF-8"?>' + . '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:cc="http://creativecommons.org/ns#" width="' . $size . '" height="' . $size . '" xmlns:xlink="http://www.w3.org/1999/xlink">' + . '<rect x="0" y="0" rx="' . $cornerRadius . '" ry="' . $cornerRadius . '" width="' . $size . '" height="' . $size . '" style="fill:' . $color . ';" />' + . '</svg>'; + // resize svg magic as this seems broken in Imagemagick + if ($mime === 'image/svg+xml' || substr($appIconContent, 0, 4) === '<svg') { + if (substr($appIconContent, 0, 5) !== '<?xml') { + $svg = '<?xml version="1.0"?>' . $appIconContent; + } else { + $svg = $appIconContent; + } + $tmp = new Imagick(); + $tmp->setBackgroundColor(new ImagickPixel('transparent')); + $tmp->setResolution(72, 72); + $tmp->readImageBlob($svg); + $x = $tmp->getImageWidth(); + $y = $tmp->getImageHeight(); + $tmp->destroy(); + + // convert svg to resized image + $appIconFile = new Imagick(); + $resX = (int)(72 * $size / $x); + $resY = (int)(72 * $size / $y); + $appIconFile->setResolution($resX, $resY); + $appIconFile->setBackgroundColor(new ImagickPixel('transparent')); + $appIconFile->readImageBlob($svg); + + /** + * invert app icons for bright primary colors + * the default nextcloud logo will not be inverted to black + */ + if ($this->util->isBrightColor($color) + && !$appIcon instanceof ISimpleFile + && $app !== 'core' + ) { + $appIconFile->negateImage(false); + } + } else { + $appIconFile = new Imagick(); + $appIconFile->setBackgroundColor(new ImagickPixel('transparent')); + $appIconFile->readImageBlob($appIconContent); + } + // offset for icon positioning + $padding = 0.15; + $border_w = (int)($appIconFile->getImageWidth() * $padding); + $border_h = (int)($appIconFile->getImageHeight() * $padding); + $innerWidth = ($appIconFile->getImageWidth() - $border_w * 2); + $innerHeight = ($appIconFile->getImageHeight() - $border_h * 2); + $appIconFile->adaptiveResizeImage($innerWidth, $innerHeight); + // center icon + $offset_w = (int)($size / 2 - $innerWidth / 2); + $offset_h = (int)($size / 2 - $innerHeight / 2); + + $finalIconFile = new Imagick(); + $finalIconFile->setBackgroundColor(new ImagickPixel('transparent')); + $finalIconFile->readImageBlob($background); + $finalIconFile->setImageVirtualPixelMethod(Imagick::VIRTUALPIXELMETHOD_TRANSPARENT); + $finalIconFile->setImageArtifact('compose:args', '1,0,-0.5,0.5'); + $finalIconFile->compositeImage($appIconFile, Imagick::COMPOSITE_ATOP, $offset_w, $offset_h); + $finalIconFile->setImageFormat('png24'); + if (defined('Imagick::INTERPOLATE_BICUBIC') === true) { + $filter = Imagick::INTERPOLATE_BICUBIC; + } else { + $filter = Imagick::FILTER_LANCZOS; + } + $finalIconFile->resizeImage($size, $size, $filter, 1, false); + + $appIconFile->destroy(); + return $finalIconFile; + } + + /** + * @param string $app app name + * @param string $image relative path to svg file in app directory + * @return string|false content of a colorized svg file + */ + public function colorSvg($app, $image) { + $imageFile = $this->util->getAppImage($app, $image); + if ($imageFile === false || $imageFile === '' || !file_exists($imageFile)) { + return false; + } + $svg = file_get_contents($imageFile); + if ($svg !== false && $svg !== '') { + $color = $this->util->elementColor($this->themingDefaults->getColorPrimary()); + $svg = $this->util->colorizeSvg($svg, $color); + return $svg; + } else { + return false; + } + } +} |