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<?php
/**
* @copyright Copyright (c) 2016 Julius Härtl <jus@bitgrid.net>
*
* @author Jan-Christoph Borchardt <hey@jancborchardt.net>
* @author Julius Haertl <jus@bitgrid.net>
* @author Julius Härtl <jus@bitgrid.net>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\Theming;
use Imagick;
use ImagickPixel;
use OCP\App\AppPathNotFoundException;
use OCP\Files\SimpleFS\ISimpleFile;
class IconBuilder {
/** @var ThemingDefaults */
private $themingDefaults;
/** @var Util */
private $util;
/**
* IconBuilder constructor.
*
* @param ThemingDefaults $themingDefaults
* @param Util $util
*/
public function __construct(
ThemingDefaults $themingDefaults,
Util $util
) {
$this->themingDefaults = $themingDefaults;
$this->util = $util;
}
/**
* @param $app string app name
* @return string|false image blob
*/
public function getFavicon($app) {
if (!$this->themingDefaults->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 $app string app name
* @param $size int size of the icon in px
* @return Imagick|false
*/
public function renderAppIcon($app, $size) {
$appIcon = $this->util->getAppIcon($app);
if($appIcon === false) {
return false;
}
if ($appIcon instanceof ISimpleFile) {
$appIconContent = $appIcon->getContent();
$mime = $appIcon->getMimeType();
} 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
$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="512" height="512" xmlns:xlink="http://www.w3.org/1999/xlink">' .
'<rect x="0" y="0" rx="100" ry="100" width="512" height="512" 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();
$tmp->readImageBlob($svg);
$x = $tmp->getImageWidth();
$y = $tmp->getImageHeight();
$res = $tmp->getImageResolution();
$tmp->destroy();
if($x>$y) {
$max = $x;
} else {
$max = $y;
}
// convert svg to resized image
$appIconFile = new Imagick();
$resX = (int)(512 * $res['x'] / $max * 2.53);
$resY = (int)(512 * $res['y'] / $max * 2.53);
$appIconFile->setResolution($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 ($this->util->invertTextColor($color)
&& !$appIcon instanceof ISimpleFile
&& $app !== "core"
) {
$appIconFile->negateImage(false);
}
$appIconFile->scaleImage(512, 512, true);
} else {
$appIconFile = new Imagick();
$appIconFile->setBackgroundColor(new ImagickPixel('transparent'));
$appIconFile->readImageBlob($appIconContent);
$appIconFile->scaleImage(512, 512, true);
}
// offset for icon positioning
$border_w = (int)($appIconFile->getImageWidth() * 0.05);
$border_h = (int)($appIconFile->getImageHeight() * 0.05);
$innerWidth = (int)($appIconFile->getImageWidth() - $border_w * 2);
$innerHeight = (int)($appIconFile->getImageHeight() - $border_h * 2);
$appIconFile->adaptiveResizeImage($innerWidth, $innerHeight);
// center icon
$offset_w = 512 / 2 - $innerWidth / 2;
$offset_h = 512 / 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 $finalIconFile;
}
public function colorSvg($app, $image) {
try {
$imageFile = $this->util->getAppImage($app, $image);
} catch (AppPathNotFoundException $e) {
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;
}
}
}