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<?php
/**
* @copyright Copyright (c) 2016 Julius Härtl <jus@bitgrid.net>
*
* @author Julius Haertl <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 OCP\IConfig;
use OCP\Files\IRootFolder;
class Util {
private $config;
private $rootFolder;
public function __construct(IConfig $config, IRootFolder $rootFolder) {
$this->config = $config;
$this->rootFolder = $rootFolder;
}
/**
* @param string $color rgb color value
* @return bool
*/
public function invertTextColor($color) {
$l = $this->calculateLuminance($color);
if($l>0.5) {
return true;
} else {
return false;
}
}
/**
* get color for on-page elements:
* theme color by default, grey if theme color is to bright
* @param $color
* @return string
*/
public function elementColor($color) {
$l = $this->calculateLuminance($color);
if($l>0.8) {
return '#555555';
} else {
return $color;
}
}
/**
* @param string $color rgb color value
* @return float
*/
public function calculateLuminance($color) {
$hex = preg_replace("/[^0-9A-Fa-f]/", '', $color);
if (strlen($hex) === 3) {
$hex = $hex{0} . $hex{0} . $hex{1} . $hex{1} . $hex{2} . $hex{2};
}
if (strlen($hex) !== 6) {
return 0;
}
$r = hexdec(substr($hex, 0, 2));
$g = hexdec(substr($hex, 2, 2));
$b = hexdec(substr($hex, 4, 2));
return (0.299 * $r + 0.587 * $g + 0.114 * $b)/255;
}
/**
* @param $color
* @return string base64 encoded radio button svg
*/
public function generateRadioButton($color) {
$radioButtonIcon = '<svg xmlns="http://www.w3.org/2000/svg" height="16" width="16">' .
'<path d="M8 1a7 7 0 0 0-7 7 7 7 0 0 0 7 7 7 7 0 0 0 7-7 7 7 0 0 0-7-7zm0 1a6 6 0 0 1 6 6 6 6 0 0 1-6 6 6 6 0 0 1-6-6 6 6 0 0 1 6-6zm0 2a4 4 0 1 0 0 8 4 4 0 0 0 0-8z" fill="'.$color.'"/></svg>';
return base64_encode($radioButtonIcon);
}
/**
* @param $app string app name
* @return string path to app icon / logo
*/
public function getAppIcon($app) {
$appPath = \OC_App::getAppPath($app);
$icon = $appPath . '/img/' . $app . '.svg';
if(file_exists($icon)) {
return $icon;
}
$icon = $appPath . '/img/app.svg';
if(file_exists($icon)) {
return $icon;
}
if($this->config->getAppValue('theming', 'logoMime', '') !== '' && $this->rootFolder->nodeExists('/themedinstancelogo')) {
return $this->config->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data/') . '/themedinstancelogo';
}
return \OC::$SERVERROOT . '/core/img/logo.svg';
}
/**
* @param $app string app name
* @param $image string relative path to image in app folder
* @return string absolute path to image
*/
public function getAppImage($app, $image) {
$appPath = \OC_App::getAppPath($app);
if($app==="core") {
$icon = \OC::$SERVERROOT . '/core/img/' . $image;
if(file_exists($icon)) {
return $icon;
}
}
$icon = $appPath . '/img/' . $image;
if(file_exists($icon)) {
return $icon;
}
$icon = $appPath . '/img/' . $image . '.svg';
if(file_exists($icon)) {
return $icon;
}
$icon = $appPath . '/img/' . $image . '.png';
if(file_exists($icon)) {
return $icon;
}
$icon = $appPath . '/img/' . $image . '.gif';
if(file_exists($icon)) {
return $icon;
}
$icon = $appPath . '/img/' . $image . '.jpg';
if(file_exists($icon)) {
return $icon;
}
return false;
}
/**
* replace default color with a custom one
*
* @param $svg string content of a svg file
* @param $color string color to match
* @return string
*/
public function colorizeSvg($svg, $color) {
$svg = preg_replace('/#0082c9/i', $color, $svg);
return $svg;
}
}
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