307 lines
12 KiB
PHP
Executable File
307 lines
12 KiB
PHP
Executable File
<?php
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// Based on <https://github.com/mecha-cms/extend.minify>
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define('MINIFY_STRING', '"(?:[^"\\\]|\\\.)*"|\'(?:[^\'\\\]|\\\.)*\'');
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define('MINIFY_COMMENT_CSS', '/\*[\s\S]*?\*/');
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define('MINIFY_COMMENT_HTML', '<!\-{2}[\s\S]*?\-{2}>');
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define('MINIFY_COMMENT_JS', '//[^\n]*');
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define('MINIFY_PATTERN_JS', '/[^\n]+?/[gimuy]*');
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define('MINIFY_HTML', '<[!/]?[a-zA-Z\d:.-]+[\s\S]*?>');
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define('MINIFY_HTML_ENT', '&(?:[a-zA-Z\d]+|\#\d+|\#x[a-fA-F\d]+);');
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define('MINIFY_HTML_KEEP', '<pre(?:\s[^<>]*?)?>[\s\S]*?</pre>|<code(?:\s[^<>]*?)?>[\s\S]*?</code>|<script(?:\s[^<>]*?)?>[\s\S]*?</script>|<style(?:\s[^<>]*?)?>[\s\S]*?</style>|<textarea(?:\s[^<>]*?)?>[\s\S]*?</textarea>');
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// get URL
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$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] === 443 ? 'https' : 'http') . '://';
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$host = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : (isset($_SERVER['SERVER_NAME']) ? $_SERVER['SERVER_NAME'] : "");
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$url = $protocol . $host;
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// escape character
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define('X', "\x1A");
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// normalize line–break(s)
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function n($s) {
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return str_replace(["\r\n", "\r"], "\n", $s);
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}
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// trim once
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function tr($a, $b) {
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if ($a && strpos($a, $b) === 0 && substr($a, -strlen($b)) === $b) {
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return substr(substr($a, strlen($b)), 0, -strlen($b));
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}
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return $a;
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}
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function fn_minify($pattern, $input) {
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return preg_split('#(' . implode('|', $pattern) . ')#', $input, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
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}
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function fn_minify_css($input, $comment = 2, $quote = 2) {
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if (!is_string($input) || !$input = n(trim($input))) return $input;
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$output = $prev = "";
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foreach (fn_minify([MINIFY_COMMENT_CSS, MINIFY_STRING], $input) as $part) {
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if (trim($part) === "") continue;
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if ($comment !== 1 && strpos($part, '/*') === 0 && substr($part, -2) === '*/') {
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if (
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$comment === 2 && (
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// Detect special comment(s) from the third character. It should be a `!` or `*` → `/*! keep */` or `/** keep */`
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strpos('*!', $part[2]) !== false ||
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// Detect license comment(s) from the content. It should contains character(s) like `@license`
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stripos($part, '@licence') !== false || // noun
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stripos($part, '@license') !== false || // verb
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stripos($part, '@preserve') !== false
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)
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) {
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$output .= $part;
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}
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continue;
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}
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if ($part[0] === '"' && substr($part, -1) === '"' || $part[0] === "'" && substr($part, -1) === "'") {
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// Remove quote(s) where possible …
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$q = $part[0];
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if (
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$quote !== 1 && (
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// <https://www.w3.org/TR/CSS2/syndata.html#uri>
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substr($prev, -4) === 'url(' && preg_match('#\burl\($#', $prev) ||
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// <https://www.w3.org/TR/CSS2/syndata.html#characters>
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substr($prev, -1) === '=' && preg_match('#^' . $q . '[a-zA-Z_][\w-]*?' . $q . '$#', $part)
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)
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) {
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$part = tr($part, $q); // trim quote(s)
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}
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$output .= $part;
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} else {
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$output .= fn_minify_css_union($part);
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}
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$prev = $part;
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}
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return trim($output);
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}
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function fn_minify_css_union($input) {
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if (stripos($input, 'calc(') !== false) {
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// Keep important white–space(s) in `calc()`
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$input = preg_replace_callback('#\b(calc\()\s*(.*?)\s*\)#i', function($m) {
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return $m[1] . preg_replace('#\s+#', X, $m[2]) . ')';
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}, $input);
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}
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$input = preg_replace([
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// Fix case for `#foo<space>[bar="baz"]`, `#foo<space>*` and `#foo<space>:first-child` [^1]
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'#(?<=[\w])\s+(\*|\[|:[\w-]+)#',
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// Fix case for `[bar="baz"]<space>.foo`, `*<space>.foo`, `:nth-child(2)<space>.foo` and `@media<space>(foo: bar)<space>and<space>(baz: qux)` [^2]
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'#([*\]\)])\s+(?=[\w\#.])#', '#\b\s+\(#', '#\)\s+\b#',
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// Minify HEX color code … [^3]
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'#\#([a-f\d])\1([a-f\d])\2([a-f\d])\3\b#i',
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// Remove white–space(s) around punctuation(s) [^4]
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'#\s*([~!@*\(\)+=\{\}\[\]:;,>\/])\s*#',
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// Replace zero unit(s) with `0` [^5]
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'#\b(?:0\.)?0([a-z]+\b)#i',
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// Replace `0.6` with `.6` [^6]
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'#\b0+\.(\d+)#',
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// Replace `:0 0`, `:0 0 0` and `:0 0 0 0` with `:0` [^7]
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'#:(0\s+){0,3}0(?=[!,;\)\}]|$)#',
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// Replace `background(?:-position)?:(0|none)` with `background$1:0 0` [^8]
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'#\b(background(?:-position)?):(?:0|none)([;,\}])#i',
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// Replace `(border(?:-radius)?|outline):none` with `$1:0` [^9]
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'#\b(border(?:-radius)?|outline):none\b#i',
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// Remove empty selector(s) [^10]
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'#(^|[\{\}])(?:[^\{\}]+)\{\}#',
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// Remove the last semi–colon and replace multiple semi–colon(s) with a semi–colon [^11]
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'#;+([;\}])#',
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// Replace multiple white–space(s) with a space [^12]
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'#\s+#'
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], [
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// [^1]
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X . '$1',
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// [^2]
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'$1' . X, X . '(', ')' . X,
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// [^3]
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'#$1$2$3',
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// [^4]
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'$1',
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// [^5]
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'0',
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// [^6]
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'.$1',
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// [^7]
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':0',
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// [^8]
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'$1:0 0$2',
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// [^9]
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'$1:0',
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// [^10]
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'$1',
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// [^11]
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'$1',
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// [^12]
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' '
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], $input);
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return trim(str_replace(X, ' ', $input));
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}
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function fn_minify_html($input, $comment = 2, $quote = 1) {
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if (!is_string($input) || !$input = n(trim($input))) return $input;
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$output = $prev = "";
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foreach (fn_minify([MINIFY_COMMENT_HTML, MINIFY_HTML_KEEP, MINIFY_HTML, MINIFY_HTML_ENT], $input) as $part) {
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if ($part === "\n") continue;
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if ($part !== ' ' && trim($part) === "" || $comment !== 1 && strpos($part, '<!--') === 0) {
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// Detect IE conditional comment(s) by its closing tag …
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if ($comment === 2 && substr($part, -12) === '<![endif]-->') {
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$output .= $part;
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}
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continue;
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}
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if ($part[0] === '<' && substr($part, -1) === '>') {
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$output .= fn_minify_html_union($part, $quote);
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} else if ($part[0] === '&' && substr($part, -1) === ';' && $part !== '<' && $part !== '>' && $part !== '&') {
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$output .= html_entity_decode($part); // Evaluate HTML entit(y|ies)
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} else {
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$output .= preg_replace('#\s+#', ' ', $part);
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}
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$prev = $part;
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}
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$output = str_replace(' </', '</', $output);
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// Force space with ` ` and line–break with `
`
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return str_ireplace([' ', ' ', '
', '
'], [' ', ' ', "\n", "\n"], trim($output));
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}
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function fn_minify_html_union($input, $quote) {
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if (
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strpos($input, ' ') === false &&
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strpos($input, "\n") === false &&
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strpos($input, "\t") === false
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) return $input;
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global $url;
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return preg_replace_callback('#<\s*([^\/\s]+)\s*(?:>|(\s[^<>]+?)\s*>)#', function($m) use($quote, $url) {
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if (isset($m[2])) {
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// Minify inline CSS(s)
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if (stripos($m[2], ' style=') !== false) {
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$m[2] = preg_replace_callback('#( style=)([\'"]?)(.*?)\2#i', function($m) {
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return $m[1] . $m[2] . fn_minify_css($m[3]) . $m[2];
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}, $m[2]);
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}
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// Minify URL(s)
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if (strpos($m[2], '://') !== false) {
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// $m[2] = str_replace([
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// $url . '/',
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// $url . '?',
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// $url . '&',
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// $url . '#',
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// $url . '"',
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// $url . "'"
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// ], [
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// '/',
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// '?',
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// '&',
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// '#',
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// '/"',
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// "/'"
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// ], $m[2]);
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}
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$a = 'a(sync|uto(focus|play))|c(hecked|ontrols)|d(efer|isabled)|hidden|ismap|loop|multiple|open|re(adonly|quired)|s((cop|elect)ed|pellcheck)';
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$a = '<' . $m[1] . preg_replace([
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// From `a="a"`, `a='a'`, `a="true"`, `a='true'`, `a=""` and `a=''` to `a` [^1]
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'#\s(' . $a . ')(?:=([\'"]?)(?:true|\1)?\2)#i',
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// Remove extra white–space(s) between HTML attribute(s) [^2]
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'#\s*([^\s=]+?)(=(?:\S+|([\'"]?).*?\3)|$)#',
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// From `<img />` to `<img/>` [^3]
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'#\s+\/$#'
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], [
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// [^1]
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' $1',
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// [^2]
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' $1$2',
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// [^3]
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'/'
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], str_replace("\n", ' ', $m[2])) . '>';
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return $quote !== 1 ? fn_minify_html_union_attr($a) : $a;
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}
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return '<' . $m[1] . '>';
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}, $input);
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}
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function fn_minify_html_union_attr($input) {
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if (strpos($input, '=') === false) return $input;
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return preg_replace_callback('#=(' . MINIFY_STRING . ')#', function($m) {
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$q = $m[1][0];
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if (strpos($m[1], ' ') === false && preg_match('#^' . $q . '[a-zA-Z_][\w-]*?' . $q . '$#', $m[1])) {
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return '=' . tr($m[1], $q);
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}
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return $m[0];
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}, $input);
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}
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function fn_minify_js($input, $comment = 2, $quote = 2) {
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if (!is_string($input) || !$input = n(trim($input))) return $input;
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$output = $prev = "";
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foreach (fn_minify([MINIFY_COMMENT_CSS, MINIFY_STRING, MINIFY_COMMENT_JS, MINIFY_PATTERN_JS], $input) as $part) {
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if (trim($part) === "") continue;
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if ($comment !== 1 && (
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strpos($part, '//') === 0 || // Remove inline comment(s)
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strpos($part, '/*') === 0 && substr($part, -2) === '*/'
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)) {
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if (
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$comment === 2 && (
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// Detect special comment(s) from the third character. It should be a `!` or `*` → `/*! keep */` or `/** keep */`
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strpos('*!', $part[2]) !== false ||
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// Detect license comment(s) from the content. It should contains character(s) like `@license`
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stripos($part, '@licence') !== false || // noun
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stripos($part, '@license') !== false || // verb
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stripos($part, '@preserve') !== false
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)
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) {
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$output .= $part;
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}
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continue;
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}
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if ($part[0] === '/' && (substr($part, -1) === '/' || preg_match('#\/[gimuy]*$#', $part))) {
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} else if ($part[0] === '"' && substr($part, -1) === '"' || $part[0] === "'" && substr($part, -1) === "'") {
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// TODO: Remove quote(s) where possible …
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$output .= $part;
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} else {
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$output .= fn_minify_js_union($part);
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}
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$prev = $part;
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}
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return $output;
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}
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function fn_minify_js_union($input) {
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return preg_replace([
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// Remove white–space(s) around punctuation(s) [^1]
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'#\s*([!%&*\(\)\-=+\[\]\{\}|;:,.<>?\/])\s*#',
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// Remove the last semi–colon and comma [^2]
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'#[;,]([\]\}])#',
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// Replace `true` with `!0` and `false` with `!1` [^3]
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'#\btrue\b#', '#\bfalse\b#', '#\b(return\s?)\s*\b#',
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// Replace `new Array(x)` with `[x]` … [^4]
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'#\b(?:new\s+)?Array\((.*?)\)#', '#\b(?:new\s+)?Object\((.*?)\)#'
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], [
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// [^1]
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'$1',
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// [^2]
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'$1',
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// [^3]
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'!0', '!1', '$1',
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// [^4]
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'[$1]', '{$1}'
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], $input);
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}
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/**
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* Backward Compatibility
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* ----------------------
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*/
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function minify_css(...$lot) {
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return fn_minify_css(...$lot);
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}
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function minify_html(...$lot) {
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return fn_minify_html(...$lot);
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}
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function minify_js(...$lot) {
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return fn_minify_js(...$lot);
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} |