Current oav website
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490
dotclear._no/inc/admin/lib.themeconfig.php
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490
dotclear._no/inc/admin/lib.themeconfig.php
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@ -0,0 +1,490 @@
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<?php
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/**
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* @package Dotclear
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* @subpackage Backend
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*
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* @copyright Olivier Meunier & Association Dotclear
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* @copyright GPL-2.0-only
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*/
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if (!defined('DC_CONTEXT_ADMIN')) {return;}
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/**
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* @brief Helper for theme configurators.
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* @since 2.7
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*
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* Provides helper tools for theme configurators.
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*/
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class dcThemeConfig
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{
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/**
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* Compute contrast ratio between two colors
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*
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* @param string $color text color
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* @param string $background background color
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*
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* @return float computed ratio
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*/
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public static function computeContrastRatio($color, $background)
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{
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// Compute contrast ratio between two colors
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$color = self::adjustColor($color);
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if (($color == '') || (strlen($color) != 7)) {
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return 0;
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}
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$background = self::adjustColor($background);
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if (($background == '') || (strlen($background) != 7)) {
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return 0;
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}
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$l1 = (0.2126 * pow(hexdec(substr($color, 1, 2)) / 255, 2.2)) +
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(0.7152 * pow(hexdec(substr($color, 3, 2)) / 255, 2.2)) +
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(0.0722 * pow(hexdec(substr($color, 5, 2)) / 255, 2.2));
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$l2 = (0.2126 * pow(hexdec(substr($background, 1, 2)) / 255, 2.2)) +
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(0.7152 * pow(hexdec(substr($background, 3, 2)) / 255, 2.2)) +
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(0.0722 * pow(hexdec(substr($background, 5, 2)) / 255, 2.2));
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if ($l1 > $l2) {
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$ratio = ($l1 + 0.05) / ($l2 + 0.05);
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} else {
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$ratio = ($l2 + 0.05) / ($l1 + 0.05);
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}
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return $ratio;
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}
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/**
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* Compute WCAG contrast ration level
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*
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* @param float $ratio computed ratio between foreground and backround color
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* @param string $size font size as defined in CSS
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* @param boolean $bold true if bold font
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*
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* @return string WCAG contrast ratio level (AAA, AA or <nothing>)
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*/
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public static function contrastRatioLevel($ratio, $size, $bold = false)
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{
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if ($size == '') {
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return '';
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}
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// Eval font size in em (assume base font size in pixels equal to 16)
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if (preg_match('/^([0-9.]+)\s*(%|pt|px|em|ex|rem)?$/', $size, $m)) {
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if (empty($m[2])) {
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$m[2] = 'em';
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}
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} else {
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return '';
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}
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switch ($m[2]) {
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case '%':
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$s = (float) $m[1] / 100;
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break;
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case 'pt':
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$s = (float) $m[1] / 12;
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break;
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case 'px':
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$s = (float) $m[1] / 16;
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break;
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case 'em':
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$s = (float) $m[1];
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break;
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case 'ex':
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$s = (float) $m[1] / 2;
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break;
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default:
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return '';
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}
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$large = ((($s > 1.5) && ($bold == false)) || (($s > 1.2) && ($bold == true)));
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// Check ratio
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if ($ratio > 7) {
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return 'AAA';
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} elseif (($ratio > 4.5) && $large) {
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return 'AAA';
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} elseif ($ratio > 4.5) {
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return 'AA';
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} elseif (($ratio > 3) && $large) {
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return 'AA';
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}
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return '';
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}
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/**
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* Return full information about constrat ratio
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*
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* @param string $color text color
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* @param string $background background color
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* @param string $size font size
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* @param boolean $bold bold font
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*
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* @return string contrast ratio including WCAG level
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*/
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public static function contrastRatio($color, $background, $size = '', $bold = false)
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{
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if (($color != '') && ($background != '')) {
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$ratio = self::computeContrastRatio($color, $background);
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$level = self::contrastRatioLevel($ratio, $size, $bold);
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return
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sprintf(__('ratio %.1f'), $ratio) .
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($level != '' ? ' ' . sprintf(__('(%s)'), $level) : '');
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}
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return '';
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}
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/**
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* Check font size
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*
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* @param string $s font size
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*
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* @return string checked font size
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*/
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public static function adjustFontSize($s)
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{
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if (preg_match('/^([0-9.]+)\s*(%|pt|px|em|ex|rem)?$/', $s, $m)) {
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if (empty($m[2])) {
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$m[2] = 'em';
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}
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return $m[1] . $m[2];
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}
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return;
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}
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/**
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* Check object position, should be x:y
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*
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* @param string $p position
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*
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* @return string checked position
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*/
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public static function adjustPosition($p)
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{
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if (!preg_match('/^[0-9]+(:[0-9]+)?$/', $p)) {
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return;
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}
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$p = explode(':', $p);
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return $p[0] . (count($p) == 1 ? ':0' : ':' . $p[1]);
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}
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/**
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* Check a CSS color
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*
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* @param string $c CSS color
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*
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* @return string checked CSS color
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*/
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public static function adjustColor($c)
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{
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if ($c === '') {
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return '';
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}
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$c = strtoupper($c);
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if (preg_match('/^[A-F0-9]{3,6}$/', $c)) {
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$c = '#' . $c;
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}
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if (preg_match('/^#[A-F0-9]{6}$/', $c)) {
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return $c;
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}
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if (preg_match('/^#[A-F0-9]{3,}$/', $c)) {
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return '#' . substr($c, 1, 1) . substr($c, 1, 1) . substr($c, 2, 1) . substr($c, 2, 1) . substr($c, 3, 1) . substr($c, 3, 1);
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}
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return '';
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}
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/**
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* Check and clean CSS
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*
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* @param string $css CSS to be checked
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*
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* @return string checked CSS
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*/
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public static function cleanCSS($css)
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{
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// TODO ?
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return $css;
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}
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/**
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* Return real path of a user defined CSS
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*
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* @param string $folder CSS folder
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*
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* @return string real path of CSS
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*/
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public static function cssPath($folder)
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{
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global $core;
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return path::real($core->blog->public_path) . '/' . $folder;
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}
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/**
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* Retirn URL of a user defined CSS
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*
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* @param string $folder CSS folder
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*
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* @return string CSS URL
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*/
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public static function cssURL($folder)
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{
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global $core;
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return $core->blog->settings->system->public_url . '/' . $folder;
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}
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/**
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* Check if user defined CSS may be written
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*
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* @param string $folder CSS folder
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* @param boolean $create create CSS folder if necessary
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*
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* @return boolean true if CSS folder exists and may be written, else false
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*/
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public static function canWriteCss($folder, $create = false)
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{
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global $core;
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$public = path::real($core->blog->public_path);
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$css = self::cssPath($folder);
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if (!is_dir($public)) {
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$core->error->add(__('The \'public\' directory does not exist.'));
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return false;
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}
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if (!is_dir($css)) {
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if (!is_writable($public)) {
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$core->error->add(sprintf(__('The \'%s\' directory cannot be modified.'), 'public'));
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return false;
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}
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if ($create) {
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files::makeDir($css);
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}
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return true;
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}
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if (!is_writable($css)) {
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$core->error->add(sprintf(__('The \'%s\' directory cannot be modified.'), 'public/' . $folder));
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return false;
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}
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return true;
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}
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/**
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* Store CSS property value in associated array
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*
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* @param array $css CSS associated array
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* @param string $selector selector
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* @param string $prop property
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* @param string $value value
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*/
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public static function prop(&$css, $selector, $prop, $value)
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{
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if ($value) {
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$css[$selector][$prop] = $value;
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}
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}
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/**
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* Store background image property in CSS associated array
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*
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* @param string $folder image folder
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* @param array $css CSS associated array
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* @param string $selector selector
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* @param boolean $value false for default, true if image should be set
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* @param string $image image filename
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*/
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public static function backgroundImg($folder, &$css, $selector, $value, $image)
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{
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$file = self::imagesPath($folder) . '/' . $image;
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if ($value && file_exists($file)) {
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$css[$selector]['background-image'] = 'url(' . self::imagesURL($folder) . '/' . $image . ')';
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}
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}
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/**
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* Write CSS file
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*
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* @param string $folder CSS folder
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* @param string $theme CSS filename
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* @param string $css CSS file content
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*/
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public static function writeCss($folder, $theme, $css)
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{
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file_put_contents(self::cssPath($folder) . '/' . $theme . '.css', $css);
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}
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/**
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* Delete CSS file
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*
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* @param string $folder CSS folder
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* @param string $theme CSS filename to be removed
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*/
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public static function dropCss($folder, $theme)
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{
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$file = path::real(self::cssPath($folder) . '/' . $theme . '.css');
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if (is_writable(dirname($file))) {
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@unlink($file);
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}
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}
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/**
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* Return public URL of user defined CSS
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*
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* @param string $folder CSS folder
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*
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* @return string CSS file URL
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*/
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public static function publicCssUrlHelper($folder)
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{
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$theme = $GLOBALS['core']->blog->settings->system->theme;
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$url = self::cssURL($folder);
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$path = self::cssPath($folder);
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if (file_exists($path . '/' . $theme . '.css')) {
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return $url . '/' . $theme . '.css';
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}
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return;
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}
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/**
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* Return real path of folder images
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*
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* @param string $folder images folder
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*
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* @return string real path of folder
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*/
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public static function imagesPath($folder)
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{
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global $core;
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return path::real($core->blog->public_path) . '/' . $folder;
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}
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/**
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* Return URL of images folder
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*
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* @param string $folder images folder
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*
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* @return string URL of images folder
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*/
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public static function imagesURL($folder)
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{
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global $core;
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return $core->blog->settings->system->public_url . '/' . $folder;
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}
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/**
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* Check if images folder exists and may be written
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*
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* @param string $folder images folder
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* @param boolean $create create the folder if not exists
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*
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* @return boolean true if folder exists and may be written
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*/
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public static function canWriteImages($folder, $create = false)
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{
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global $core;
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$public = path::real($core->blog->public_path);
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$imgs = self::imagesPath($folder);
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if (!function_exists('imagecreatetruecolor') || !function_exists('imagepng') || !function_exists('imagecreatefrompng')) {
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$core->error->add(__('At least one of the following functions is not available: ' .
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'imagecreatetruecolor, imagepng & imagecreatefrompng.'));
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return false;
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}
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if (!is_dir($public)) {
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$core->error->add(__('The \'public\' directory does not exist.'));
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return false;
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}
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if (!is_dir($imgs)) {
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if (!is_writable($public)) {
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$core->error->add(sprintf(__('The \'%s\' directory cannot be modified.'), 'public'));
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return false;
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}
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if ($create) {
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files::makeDir($imgs);
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}
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return true;
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}
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if (!is_writable($imgs)) {
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$core->error->add(sprintf(__('The \'%s\' directory cannot be modified.'), 'public/' . $folder));
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return false;
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}
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return true;
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}
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/**
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* Upload an image in images folder
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*
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* @param string $folder images folder
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* @param string $f selected image file (as $_FILES[<file input fieldname>])
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* @param int $width check accurate width of uploaded image if <> 0
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*
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* @return string full pathname of uploaded image
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*/
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public static function uploadImage($folder, $f, $width = 0)
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{
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if (!self::canWriteImages($folder, true)) {
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throw new Exception(__('Unable to create images.'));
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}
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$name = $f['name'];
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$type = files::getMimeType($name);
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if ($type != 'image/jpeg' && $type != 'image/png') {
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throw new Exception(__('Invalid file type.'));
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}
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$dest = self::imagesPath($folder) . '/uploaded' . ($type == 'image/png' ? '.png' : '.jpg');
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if (@move_uploaded_file($f['tmp_name'], $dest) === false) {
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throw new Exception(__('An error occurred while writing the file.'));
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}
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if ($width) {
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$s = getimagesize($dest);
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if ($s[0] != $width) {
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throw new Exception(sprintf(__('Uploaded image is not %s pixels wide.'), $width));
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}
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}
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return $dest;
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}
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/**
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* Delete an image from images folder (with its thumbnails if any)
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*
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* @param string $folder images folder
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* @param string $img image filename
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*/
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public static function dropImage($folder, $img)
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{
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global $core;
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$img = path::real(self::imagesPath($folder) . '/' . $img);
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if (is_writable(dirname($img))) {
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// Delete thumbnails if any
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try {
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$media = new dcMedia($core);
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$media->imageThumbRemove($img);
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} catch (Exception $e) {
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$core->error->add($e->getMessage());
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}
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// Delete image
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@unlink($img);
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}
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}
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}
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