+++ /dev/null
-<?php
-/**
- * PHP port of CSSJanus.
- *
- * Copyright 2008 Google Inc.
- * Copyright 2010 Roan Kattouw
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * @file
- */
-
-/**
- * This is a PHP port of CSSJanus, a utility that transforms CSS style sheets
- * written for LTR to RTL.
- *
- * Original code: http://code.google.com/p/cssjanus/source/browse/trunk/cssjanus.py
- *
- * @author Lindsey Simon <elsigh@google.com>
- * @author Roan Kattouw
- */
-class CSSJanus {
- // Patterns defined as null are built dynamically by buildPatterns()
- private static $patterns = array(
- 'tmpToken' => '`TMP`',
- 'nonAscii' => '[\200-\377]',
- 'unicode' => '(?:(?:\\[0-9a-f]{1,6})(?:\r\n|\s)?)',
- 'num' => '(?:[0-9]*\.[0-9]+|[0-9]+)',
- 'unit' => '(?:em|ex|px|cm|mm|in|pt|pc|deg|rad|grad|ms|s|hz|khz|%)',
- 'body_selector' => 'body\s*{\s*',
- 'direction' => 'direction\s*:\s*',
- 'escape' => null,
- 'nmstart' => null,
- 'nmchar' => null,
- 'ident' => null,
- 'quantity' => null,
- 'possibly_negative_quantity' => null,
- 'color' => null,
- 'url_special_chars' => '[!#$%&*-~]',
- 'valid_after_uri_chars' => '[\'\"]?\s*',
- 'url_chars' => null,
- 'lookahead_not_open_brace' => null,
- 'lookahead_not_closing_paren' => null,
- 'lookahead_for_closing_paren' => null,
- 'lookahead_not_letter' => '(?![a-zA-Z])',
- 'lookbehind_not_letter' => '(?<![a-zA-Z])',
- 'chars_within_selector' => '[^\}]*?',
- 'noflip_annotation' => '\/\*\!?\s*@noflip\s*\*\/',
- 'noflip_single' => null,
- 'noflip_class' => null,
- 'comment' => '/\/\*[^*]*\*+([^\/*][^*]*\*+)*\//',
- 'direction_ltr' => null,
- 'direction_rtl' => null,
- 'left' => null,
- 'right' => null,
- 'left_in_url' => null,
- 'right_in_url' => null,
- 'ltr_in_url' => null,
- 'rtl_in_url' => null,
- 'cursor_east' => null,
- 'cursor_west' => null,
- 'four_notation_quantity' => null,
- 'four_notation_color' => null,
- 'border_radius' => null,
- 'box_shadow' => null,
- 'text_shadow1' => null,
- 'text_shadow2' => null,
- 'bg_horizontal_percentage' => null,
- 'bg_horizontal_percentage_x' => null,
- );
-
- /**
- * Build patterns we can't define above because they depend on other patterns.
- */
- private static function buildPatterns() {
- if (!is_null(self::$patterns['escape'])) {
- // Patterns have already been built
- return;
- }
-
- // @codingStandardsIgnoreStart Generic.Files.LineLength.TooLong
- $patterns =& self::$patterns;
- $patterns['escape'] = "(?:{$patterns['unicode']}|\\[^\r\n\f0-9a-f])";
- $patterns['nmstart'] = "(?:[_a-z]|{$patterns['nonAscii']}|{$patterns['escape']})";
- $patterns['nmchar'] = "(?:[_a-z0-9-]|{$patterns['nonAscii']}|{$patterns['escape']})";
- $patterns['ident'] = "-?{$patterns['nmstart']}{$patterns['nmchar']}*";
- $patterns['quantity'] = "{$patterns['num']}(?:\s*{$patterns['unit']}|{$patterns['ident']})?";
- $patterns['possibly_negative_quantity'] = "((?:-?{$patterns['quantity']})|(?:inherit|auto))";
- $patterns['color'] = "(#?{$patterns['nmchar']}+|(?:rgba?|hsla?)\([ \d.,%-]+\))";
- $patterns['url_chars'] = "(?:{$patterns['url_special_chars']}|{$patterns['nonAscii']}|{$patterns['escape']})*";
- $patterns['lookahead_not_open_brace'] = "(?!({$patterns['nmchar']}|\r?\n|\s|#|\:|\.|\,|\+|>|\(|\)|\[|\]|=|\*=|~=|\^=|'[^']*'])*?{)";
- $patterns['lookahead_not_closing_paren'] = "(?!{$patterns['url_chars']}?{$patterns['valid_after_uri_chars']}\))";
- $patterns['lookahead_for_closing_paren'] = "(?={$patterns['url_chars']}?{$patterns['valid_after_uri_chars']}\))";
- $patterns['noflip_single'] = "/({$patterns['noflip_annotation']}{$patterns['lookahead_not_open_brace']}[^;}]+;?)/i";
- $patterns['noflip_class'] = "/({$patterns['noflip_annotation']}{$patterns['chars_within_selector']}})/i";
- $patterns['direction_ltr'] = "/({$patterns['direction']})ltr/i";
- $patterns['direction_rtl'] = "/({$patterns['direction']})rtl/i";
- $patterns['left'] = "/{$patterns['lookbehind_not_letter']}(left){$patterns['lookahead_not_letter']}{$patterns['lookahead_not_closing_paren']}{$patterns['lookahead_not_open_brace']}/i";
- $patterns['right'] = "/{$patterns['lookbehind_not_letter']}(right){$patterns['lookahead_not_letter']}{$patterns['lookahead_not_closing_paren']}{$patterns['lookahead_not_open_brace']}/i";
- $patterns['left_in_url'] = "/{$patterns['lookbehind_not_letter']}(left){$patterns['lookahead_for_closing_paren']}/i";
- $patterns['right_in_url'] = "/{$patterns['lookbehind_not_letter']}(right){$patterns['lookahead_for_closing_paren']}/i";
- $patterns['ltr_in_url'] = "/{$patterns['lookbehind_not_letter']}(ltr){$patterns['lookahead_for_closing_paren']}/i";
- $patterns['rtl_in_url'] = "/{$patterns['lookbehind_not_letter']}(rtl){$patterns['lookahead_for_closing_paren']}/i";
- $patterns['cursor_east'] = "/{$patterns['lookbehind_not_letter']}([ns]?)e-resize/";
- $patterns['cursor_west'] = "/{$patterns['lookbehind_not_letter']}([ns]?)w-resize/";
- $patterns['four_notation_quantity_props'] = "((?:margin|padding|border-width)\s*:\s*)";
- $patterns['four_notation_quantity'] = "/{$patterns['four_notation_quantity_props']}{$patterns['possibly_negative_quantity']}(\s+){$patterns['possibly_negative_quantity']}(\s+){$patterns['possibly_negative_quantity']}(\s+){$patterns['possibly_negative_quantity']}(\s*[;}])/i";
- $patterns['four_notation_color'] = "/((?:-color|border-style)\s*:\s*){$patterns['color']}(\s+){$patterns['color']}(\s+){$patterns['color']}(\s+){$patterns['color']}(\s*[;}])/i";
- $patterns['border_radius'] = "/(border-radius\s*:\s*)([^;}]*)/";
- $patterns['box_shadow'] = "/(box-shadow\s*:\s*(?:inset\s*)?){$patterns['possibly_negative_quantity']}/i";
- $patterns['text_shadow1'] = "/(text-shadow\s*:\s*){$patterns['color']}(\s*){$patterns['possibly_negative_quantity']}/i";
- $patterns['text_shadow2'] = "/(text-shadow\s*:\s*){$patterns['possibly_negative_quantity']}/i";
- $patterns['bg_horizontal_percentage'] = "/(background(?:-position)?\s*:\s*(?:[^:;}\s]+\s+)*?)({$patterns['quantity']})/i";
- $patterns['bg_horizontal_percentage_x'] = "/(background-position-x\s*:\s*)(-?{$patterns['num']}%)/i";
- // @codingStandardsIgnoreEnd
-
- }
-
- /**
- * Transform an LTR stylesheet to RTL
- * @param string $css stylesheet to transform
- * @param $swapLtrRtlInURL Boolean: If true, swap 'ltr' and 'rtl' in URLs
- * @param $swapLeftRightInURL Boolean: If true, swap 'left' and 'right' in URLs
- * @return string Transformed stylesheet
- */
- public static function transform($css, $swapLtrRtlInURL = false, $swapLeftRightInURL = false) {
- // We wrap tokens in ` , not ~ like the original implementation does.
- // This was done because ` is not a legal character in CSS and can only
- // occur in URLs, where we escape it to %60 before inserting our tokens.
- $css = str_replace('`', '%60', $css);
-
- self::buildPatterns();
-
- // Tokenize single line rules with /* @noflip */
- $noFlipSingle = new CSSJanusTokenizer(self::$patterns['noflip_single'], '`NOFLIP_SINGLE`');
- $css = $noFlipSingle->tokenize($css);
-
- // Tokenize class rules with /* @noflip */
- $noFlipClass = new CSSJanusTokenizer(self::$patterns['noflip_class'], '`NOFLIP_CLASS`');
- $css = $noFlipClass->tokenize($css);
-
- // Tokenize comments
- $comments = new CSSJanusTokenizer(self::$patterns['comment'], '`C`');
- $css = $comments->tokenize($css);
-
- // LTR->RTL fixes start here
- $css = self::fixDirection($css);
- if ($swapLtrRtlInURL) {
- $css = self::fixLtrRtlInURL($css);
- }
-
- if ($swapLeftRightInURL) {
- $css = self::fixLeftRightInURL($css);
- }
- $css = self::fixLeftAndRight($css);
- $css = self::fixCursorProperties($css);
- $css = self::fixFourPartNotation($css);
- $css = self::fixBorderRadius($css);
- $css = self::fixBackgroundPosition($css);
- $css = self::fixShadows($css);
-
- // Detokenize stuff we tokenized before
- $css = $comments->detokenize($css);
- $css = $noFlipClass->detokenize($css);
- $css = $noFlipSingle->detokenize($css);
-
- return $css;
- }
-
- /**
- * Replace direction: ltr; with direction: rtl; and vice versa.
- *
- * The original implementation only does this inside body selectors
- * and misses "body\n{\ndirection:ltr;\n}". This function does not have
- * these problems.
- *
- * See https://code.google.com/p/cssjanus/issues/detail?id=15
- *
- * @param $css string
- * @return string
- */
- private static function fixDirection($css) {
- $css = preg_replace(
- self::$patterns['direction_ltr'],
- '$1' . self::$patterns['tmpToken'],
- $css
- );
- $css = preg_replace(self::$patterns['direction_rtl'], '$1ltr', $css);
- $css = str_replace(self::$patterns['tmpToken'], 'rtl', $css);
-
- return $css;
- }
-
- /**
- * Replace 'ltr' with 'rtl' and vice versa in background URLs
- * @param $css string
- * @return string
- */
- private static function fixLtrRtlInURL($css) {
- $css = preg_replace(self::$patterns['ltr_in_url'], self::$patterns['tmpToken'], $css);
- $css = preg_replace(self::$patterns['rtl_in_url'], 'ltr', $css);
- $css = str_replace(self::$patterns['tmpToken'], 'rtl', $css);
-
- return $css;
- }
-
- /**
- * Replace 'left' with 'right' and vice versa in background URLs
- * @param $css string
- * @return string
- */
- private static function fixLeftRightInURL($css) {
- $css = preg_replace(self::$patterns['left_in_url'], self::$patterns['tmpToken'], $css);
- $css = preg_replace(self::$patterns['right_in_url'], 'left', $css);
- $css = str_replace(self::$patterns['tmpToken'], 'right', $css);
-
- return $css;
- }
-
- /**
- * Flip rules like left: , padding-right: , etc.
- * @param $css string
- * @return string
- */
- private static function fixLeftAndRight($css) {
- $css = preg_replace(self::$patterns['left'], self::$patterns['tmpToken'], $css);
- $css = preg_replace(self::$patterns['right'], 'left', $css);
- $css = str_replace(self::$patterns['tmpToken'], 'right', $css);
-
- return $css;
- }
-
- /**
- * Flip East and West in rules like cursor: nw-resize;
- * @param $css string
- * @return string
- */
- private static function fixCursorProperties($css) {
- $css = preg_replace(
- self::$patterns['cursor_east'],
- '$1' . self::$patterns['tmpToken'],
- $css
- );
- $css = preg_replace(self::$patterns['cursor_west'], '$1e-resize', $css);
- $css = str_replace(self::$patterns['tmpToken'], 'w-resize', $css);
-
- return $css;
- }
-
- /**
- * Swap the second and fourth parts in four-part notation rules like
- * padding: 1px 2px 3px 4px;
- *
- * Unlike the original implementation, this function doesn't suffer from
- * the bug where whitespace is not preserved when flipping four-part rules
- * and four-part color rules with multiple whitespace characters between
- * colors are not recognized.
- * See https://code.google.com/p/cssjanus/issues/detail?id=16
- * @param $css string
- * @return string
- */
- private static function fixFourPartNotation($css) {
- $css = preg_replace(self::$patterns['four_notation_quantity'], '$1$2$3$8$5$6$7$4$9', $css);
- $css = preg_replace(self::$patterns['four_notation_color'], '$1$2$3$8$5$6$7$4$9', $css);
- return $css;
- }
-
- /**
- * Swaps appropriate corners in border-radius values.
- *
- * @param $css string
- * @return string
- */
- private static function fixBorderRadius($css) {
- $css = preg_replace_callback(self::$patterns['border_radius'], function ($matches) {
- $pre = $matches[1];
- $values = $matches[2];
- $numValues = count(preg_split('/\s+/', trim($values)));
- switch ($numValues) {
- case 4:
- $values = preg_replace('/^(\S+)(\s*)(\S+)(\s*)(\S+)(\s*)(\S+)/', '$3$2$1$4$7$6$5', $values);
- break;
- case 3:
- case 2:
- $values = preg_replace('/^(\S+)(\s*)(\S+)/', '$3$2$1', $values);
- break;
- }
- return $pre . $values;
- }, $css);
-
- return $css;
- }
-
- /**
- * Negates horizontal offset in box-shadow and text-shadow rules.
- *
- * @param $css string
- * @return string
- */
- private static function fixShadows($css) {
- // Flips the sign of a CSS value, possibly with a unit.
- // (We can't just negate the value with unary minus due to the units.)
- $flipSign = function ($cssValue) {
- // Don't mangle zeroes
- if (floatval($cssValue) === 0.0) {
- return $cssValue;
- } elseif ($cssValue[0] === '-') {
- return substr($cssValue, 1);
- } else {
- return "-" . $cssValue;
- }
- };
-
- $css = preg_replace_callback(self::$patterns['box_shadow'], function ($matches) use ($flipSign) {
- return $matches[1] . $flipSign($matches[2]);
- }, $css);
-
- $css = preg_replace_callback(self::$patterns['text_shadow1'], function ($matches) use ($flipSign) {
- return $matches[1] . $matches[2] . $matches[3] . $flipSign($matches[4]);
- }, $css);
-
- $css = preg_replace_callback(self::$patterns['text_shadow2'], function ($matches) use ($flipSign) {
- return $matches[1] . $flipSign($matches[2]);
- }, $css);
-
- return $css;
- }
-
- /**
- * Flip horizontal background percentages.
- * @param $css string
- * @return string
- */
- private static function fixBackgroundPosition($css) {
- $replaced = preg_replace_callback(
- self::$patterns['bg_horizontal_percentage'],
- array('self', 'calculateNewBackgroundPosition'),
- $css
- );
- if ($replaced !== null) {
- // preg_replace_callback() sometimes returns null
- $css = $replaced;
- }
- $replaced = preg_replace_callback(
- self::$patterns['bg_horizontal_percentage_x'],
- array('self', 'calculateNewBackgroundPosition'),
- $css
- );
- if ($replaced !== null) {
- $css = $replaced;
- }
-
- return $css;
- }
-
- /**
- * Callback for fixBackgroundPosition()
- * @param $matches array
- * @return string
- */
- private static function calculateNewBackgroundPosition($matches) {
- $value = $matches[2];
- if (substr($value, -1) === '%') {
- $idx = strpos($value, '.');
- if ($idx !== false) {
- $len = strlen($value) - $idx - 2;
- $value = number_format(100 - $value, $len) . '%';
- } else {
- $value = (100 - $value) . '%';
- }
- }
- return $matches[1] . $value;
- }
-}
-
-/**
- * Utility class used by CSSJanus that tokenizes and untokenizes things we want
- * to protect from being janused.
- * @author Roan Kattouw
- */
-class CSSJanusTokenizer {
- private $regex;
- private $token;
- private $originals;
-
- /**
- * Constructor
- * @param string $regex Regular expression whose matches to replace by a token.
- * @param string $token Token
- */
- public function __construct($regex, $token) {
- $this->regex = $regex;
- $this->token = $token;
- $this->originals = array();
- }
-
- /**
- * Replace all occurrences of $regex in $str with a token and remember
- * the original strings.
- * @param string $str to tokenize
- * @return string Tokenized string
- */
- public function tokenize($str) {
- return preg_replace_callback($this->regex, array($this, 'tokenizeCallback'), $str);
- }
-
- /**
- * @param $matches array
- * @return string
- */
- private function tokenizeCallback($matches) {
- $this->originals[] = $matches[0];
- return $this->token;
- }
-
- /**
- * Replace tokens with their originals. If multiple strings were tokenized, it's important they be
- * detokenized in exactly the SAME ORDER.
- * @param string $str previously run through tokenize()
- * @return string Original string
- */
- public function detokenize($str) {
- // PHP has no function to replace only the first occurrence or to
- // replace occurrences of the same string with different values,
- // so we use preg_replace_callback() even though we don't really need a regex
- return preg_replace_callback(
- '/' . preg_quote($this->token, '/') . '/',
- array($this, 'detokenizeCallback'),
- $str
- );
- }
-
- /**
- * @param $matches
- * @return mixed
- */
- private function detokenizeCallback($matches) {
- $retval = current($this->originals);
- next($this->originals);
-
- return $retval;
- }
-}
dépôts / lhc / web / wiklou.git / commitdiff