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| 1 | <?php |
1 | <?php |
| 2 | 2 | ||
| 3 | /* |
3 | /* |
| 4 | * Color Utils for PHP |
4 | * Color Utils for PHP |
| 5 | * Copyright 2019 - 2022 Daniel Marschall, ViaThinkSoft |
5 | * Copyright 2019 - 2023 Daniel Marschall, ViaThinkSoft |
| 6 | * Revision 2022-12-27 |
6 | * Revision 2023-01-03 |
| 7 | * |
7 | * |
| 8 | * Licensed under the Apache License, Version 2.0 (the "License"); |
8 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 9 | * you may not use this file except in compliance with the License. |
9 | * you may not use this file except in compliance with the License. |
| 10 | * You may obtain a copy of the License at |
10 | * You may obtain a copy of the License at |
| 11 | * |
11 | * |
| Line 101... | Line 101... | ||
| 101 | $color .= (strlen($g) < 2 ? '0' : '').$g; |
101 | $color .= (strlen($g) < 2 ? '0' : '').$g; |
| 102 | $color .= (strlen($b) < 2 ? '0' : '').$b; |
102 | $color .= (strlen($b) < 2 ? '0' : '').$b; |
| 103 | return '#'.$color; |
103 | return '#'.$color; |
| 104 | } |
104 | } |
| 105 | 105 | ||
| 106 | function changeHueOfCSS($css_content, $h_shift=0, $s_shift=0, $v_shift=0) { |
- | |
| 107 | // TODO: also support rgb() and rgba() color references (and maybe also hsl/hsla and color names?) |
106 | // TODO: Also support hsl() and hsla() color schemes |
| 108 | // TODO: Bootstrap uses "--bs-link-color-rgb: 13,110,253;" which we must also accept |
107 | function changeCSSWithRgbFunction($css_content, $rgb_function) { |
| 109 | $css_content = preg_replace('@(\\}\\s*)#@ismU', '\\1'.chr(1), $css_content); |
108 | $css_content = preg_replace('@(\\}\\s*)#@ismU', '\\1'.chr(1), $css_content); |
| 110 | $css_content = preg_replace('@(^\\s*)#@isU', '\\1'.chr(1), $css_content); |
109 | $css_content = preg_replace('@(^\\s*)#@isU', '\\1'.chr(1), $css_content); |
| 111 | $css_content = preg_replace_callback('@#([0-9a-fA-F]{6}|[0-9a-fA-F]{3})@ismU', |
110 | $css_content = preg_replace_callback('@#([0-9a-fA-F]{6}|[0-9a-fA-F]{3})@ismU', |
| 112 | function ($x) use ($h_shift, $s_shift, $v_shift) { |
111 | function ($x) use ($rgb_function) { |
| 113 | if (strlen($x[1]) == 3) { |
112 | if (strlen($x[1]) == 3) { |
| 114 | $r = hexdec($x[1][0].$x[1][0]); |
113 | $r = hexdec($x[1][0].$x[1][0]); |
| 115 | $g = hexdec($x[1][1].$x[1][1]); |
114 | $g = hexdec($x[1][1].$x[1][1]); |
| 116 | $b = hexdec($x[1][2].$x[1][2]); |
115 | $b = hexdec($x[1][2].$x[1][2]); |
| 117 | } else { |
116 | } else { |
| 118 | $r = hexdec($x[1][0].$x[1][1]); |
117 | $r = hexdec($x[1][0].$x[1][1]); |
| 119 | $g = hexdec($x[1][2].$x[1][3]); |
118 | $g = hexdec($x[1][2].$x[1][3]); |
| 120 | $b = hexdec($x[1][4].$x[1][5]); |
119 | $b = hexdec($x[1][4].$x[1][5]); |
| 121 | } |
120 | } |
| - | 121 | $rgb_function($r,$g,$b); |
|
| - | 122 | return rgb2html($r,$g,$b); |
|
| - | 123 | }, $css_content); |
|
| - | 124 | $css_content = preg_replace_callback('@rgb\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\)@ismU', |
|
| - | 125 | function ($x) use ($rgb_function) { |
|
| - | 126 | $r = $x[1]; |
|
| - | 127 | $g = $x[2]; |
|
| - | 128 | $b = $x[3]; |
|
| - | 129 | $rgb_function($r,$g,$b); |
|
| - | 130 | return "rgb($r,$g,$b)"; |
|
| - | 131 | }, $css_content); |
|
| - | 132 | $css_content = preg_replace_callback('@rgba\\s*\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*([\\d\\.]+)\\s*\\)@ismU', |
|
| - | 133 | function ($x) use ($rgb_function) { |
|
| - | 134 | $r = $x[1]; |
|
| - | 135 | $g = $x[2]; |
|
| - | 136 | $b = $x[3]; |
|
| - | 137 | $a = $x[4]; |
|
| - | 138 | $rgb_function($r,$g,$b); |
|
| - | 139 | return "rgba($r,$g,$b,$a)"; |
|
| - | 140 | }, $css_content); |
|
| - | 141 | $css_content = preg_replace_callback('@\\-rgb:\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*;@ismU', |
|
| - | 142 | // Bootstrap uses "--bs-link-color-rgb: 13,110,253;" which we must also accept |
|
| - | 143 | function ($x) use ($rgb_function) { |
|
| - | 144 | $r = $x[1]; |
|
| - | 145 | $g = $x[2]; |
|
| - | 146 | $b = $x[3]; |
|
| - | 147 | $rgb_function($r,$g,$b); |
|
| - | 148 | return "-rgb:$r,$g,$b;"; |
|
| - | 149 | }, $css_content); |
|
| - | 150 | $css_content = str_replace(chr(1), '#', $css_content); |
|
| - | 151 | return $css_content; |
|
| - | 152 | } |
|
| - | 153 | ||
| - | 154 | function changeHueOfCSS($css_content, $h_shift=0, $s_shift=0, $v_shift=0) { |
|
| - | 155 | $rgb_function = function(&$r,&$g,&$b) use ($h_shift, $s_shift, $v_shift) { |
|
| 122 | list ($h,$s,$v) = RGB_TO_HSV($r, $g, $b); |
156 | list ($h,$s,$v) = RGB_TO_HSV($r, $g, $b); |
| 123 | $h = (float)$h; |
157 | $h = (float)$h; |
| 124 | $s = (float)$s; |
158 | $s = (float)$s; |
| 125 | $v = (float)$v; |
159 | $v = (float)$v; |
| 126 | $h = ($h + $h_shift); while ($h > 1) $h -= 1; while ($h < 0) $h += 1; |
160 | $h = ($h + $h_shift); while ($h > 1) $h -= 1; while ($h < 0) $h += 1; |
| 127 | $s = ($s + $s_shift); while ($s > 1) $s = 1; while ($s < 0) $s = 0; |
161 | $s = ($s + $s_shift); while ($s > 1) $s = 1; while ($s < 0) $s = 0; |
| 128 | $v = ($v + $v_shift); while ($v > 1) $v = 1; while ($v < 0) $v = 0; |
162 | $v = ($v + $v_shift); while ($v > 1) $v = 1; while ($v < 0) $v = 0; |
| 129 | list ($r,$g,$b) = HSV_TO_RGB($h, $s, $v); |
163 | list ($r,$g,$b) = HSV_TO_RGB($h, $s, $v); |
| 130 | return rgb2html($r,$g,$b); |
- | |
| 131 | }, $css_content); |
164 | }; |
| 132 | $css_content = str_replace(chr(1), '#', $css_content); |
165 | return changeCSSWithRgbFunction($css_content, $rgb_function); |
| 133 | return $css_content; |
- | |
| 134 | } |
166 | } |
| 135 | 167 | ||
| 136 | function invertColorsOfCSS($css_content) { |
168 | function invertColorsOfCSS($css_content) { |
| 137 | // TODO: also support rgb() and rgba() color references (and maybe also hsl/hsla and color names?) |
- | |
| 138 | // TODO: Bootstrap uses "--bs-link-color-rgb: 13,110,253;" which we must also accept |
- | |
| 139 | $css_content = preg_replace('@(\\}\\s*)#@ismU', '\\1'.chr(1), $css_content); |
- | |
| 140 | $css_content = preg_replace('@(^\\s*)#@isU', '\\1'.chr(1), $css_content); |
- | |
| 141 | $css_content = preg_replace_callback('@#([0-9a-fA-F]{6}|[0-9a-fA-F]{3})@ismU', |
- | |
| 142 | function ($x) { |
169 | $rgb_function = function(&$r,&$g,&$b) { |
| 143 | if (strlen($x[1]) == 3) { |
- | |
| 144 | $r = hexdec($x[1][0].$x[1][0]); |
- | |
| 145 | $g = hexdec($x[1][1].$x[1][1]); |
- | |
| 146 | $b = hexdec($x[1][2].$x[1][2]); |
- | |
| 147 | } else { |
- | |
| 148 | $r = hexdec($x[1][0].$x[1][1]); |
- | |
| 149 | $g = hexdec($x[1][2].$x[1][3]); |
- | |
| 150 | $b = hexdec($x[1][4].$x[1][5]); |
- | |
| 151 | } |
- | |
| 152 | $r = 255 - $r; |
170 | $r = 255 - $r; |
| 153 | $g = 255 - $g; |
171 | $g = 255 - $g; |
| 154 | $b = 255 - $b; |
172 | $b = 255 - $b; |
| 155 | return rgb2html($r,$g,$b); |
- | |
| 156 | }, $css_content); |
173 | }; |
| 157 | $css_content = str_replace(chr(1), '#', $css_content); |
174 | return changeCSSWithRgbFunction($css_content, $rgb_function); |
| 158 | return $css_content; |
- | |
| 159 | } |
175 | } |