[3019] | 1 | <?php |
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| 2 | /** |
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| 3 | * DOMPDF - PHP5 HTML to PDF renderer |
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| 4 | * |
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| 5 | * File: $RCSfile: stylesheet.cls.php,v $ |
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| 6 | * Created on: 2004-06-01 |
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| 7 | * |
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| 8 | * Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca> |
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| 9 | * |
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| 10 | * This library is free software; you can redistribute it and/or |
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| 11 | * modify it under the terms of the GNU Lesser General Public |
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| 12 | * License as published by the Free Software Foundation; either |
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| 13 | * version 2.1 of the License, or (at your option) any later version. |
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| 14 | * |
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| 15 | * This library is distributed in the hope that it will be useful, |
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * Lesser General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU Lesser General Public License |
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| 21 | * along with this library in the file LICENSE.LGPL; if not, write to the |
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| 22 | * Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 23 | * 02111-1307 USA |
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| 24 | * |
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| 25 | * Alternatively, you may distribute this software under the terms of the |
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| 26 | * PHP License, version 3.0 or later. A copy of this license should have |
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| 27 | * been distributed with this file in the file LICENSE.PHP . If this is not |
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| 28 | * the case, you can obtain a copy at http://www.php.net/license/3_0.txt. |
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| 29 | * |
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| 30 | * The latest version of DOMPDF might be available at: |
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| 31 | * http://www.digitaljunkies.ca/dompdf |
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| 32 | * |
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| 33 | * @link http://www.digitaljunkies.ca/dompdf |
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| 34 | * @copyright 2004 Benj Carson |
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| 35 | * @author Benj Carson <benjcarson@digitaljunkies.ca> |
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| 36 | * @contributor Helmut Tischer <htischer@weihenstephan.org> |
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| 37 | * @package dompdf |
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| 38 | * @version 0.5.1 |
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| 39 | * |
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| 40 | * Changes |
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| 41 | * @contributor Helmut Tischer <htischer@weihenstephan.org> |
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| 42 | * @version 0.5.1.htischer.20090507 |
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| 43 | * - Specifity of css selector chain was too small because leading whitespace |
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| 44 | * to be counted as number of elements was removed |
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| 45 | * - On parsing css properties accept and register !important attribute |
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| 46 | * - Add optional debug output |
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| 47 | * @version 20090610 |
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| 48 | * - _parse_properties on style property name and value remove augmenting superflous |
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| 49 | * space for consistent parsing, in particular combined values like background |
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| 50 | */ |
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| 51 | |
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| 52 | /* $Id: stylesheet.cls.php 186 2009-10-19 22:42:06Z eclecticgeek@gmail.com $ */ |
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| 53 | |
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| 54 | /** |
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| 55 | * The location of the default built-in CSS file. |
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| 56 | * {@link Stylesheet::DEFAULT_STYLESHEET} |
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| 57 | */ |
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| 58 | define('__DEFAULT_STYLESHEET', DOMPDF_LIB_DIR . DIRECTORY_SEPARATOR . "res" . DIRECTORY_SEPARATOR . "html.css"); |
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| 59 | |
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| 60 | /** |
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| 61 | * The master stylesheet class |
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| 62 | * |
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| 63 | * The Stylesheet class is responsible for parsing stylesheets and style |
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| 64 | * tags/attributes. It also acts as a registry of the individual Style |
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| 65 | * objects generated by the current set of loaded CSS files and style |
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| 66 | * elements. |
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| 67 | * |
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| 68 | * @see Style |
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| 69 | * @package dompdf |
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| 70 | */ |
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| 71 | class Stylesheet { |
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| 72 | |
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| 73 | |
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| 74 | |
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| 75 | /** |
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| 76 | * the location of the default built-in CSS file. |
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| 77 | * |
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| 78 | */ |
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| 79 | const DEFAULT_STYLESHEET = __DEFAULT_STYLESHEET; // Hack: can't |
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| 80 | // concatenate stuff in |
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| 81 | // const declarations, |
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| 82 | // but I can do this? |
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| 83 | // protected members |
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| 84 | |
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| 85 | /** |
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| 86 | * array of currently defined styles |
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| 87 | * @var array |
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| 88 | */ |
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| 89 | private $_styles; |
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| 90 | |
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| 91 | /** |
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| 92 | * base protocol of the document being parsed |
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| 93 | * |
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| 94 | * Used to handle relative urls. |
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| 95 | * |
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| 96 | * @var string |
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| 97 | */ |
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| 98 | private $_protocol; |
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| 99 | |
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| 100 | /** |
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| 101 | * base hostname of the document being parsed |
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| 102 | * |
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| 103 | * Used to handle relative urls. |
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| 104 | * @var string |
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| 105 | */ |
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| 106 | private $_base_host; |
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| 107 | |
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| 108 | /** |
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| 109 | * base path of the document being parsed |
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| 110 | * |
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| 111 | * Used to handle relative urls. |
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| 112 | * @var string |
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| 113 | */ |
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| 114 | private $_base_path; |
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| 115 | |
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| 116 | |
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| 117 | /** |
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| 118 | * the style defined by @page rules |
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| 119 | * |
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| 120 | * @var Style |
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| 121 | */ |
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| 122 | private $_page_style; |
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| 123 | |
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| 124 | |
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| 125 | /** |
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| 126 | * list of loaded files, used to prevent recursion |
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| 127 | * |
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| 128 | * @var array |
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| 129 | */ |
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| 130 | private $_loaded_files; |
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| 131 | |
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| 132 | /** |
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| 133 | * accepted CSS media types |
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| 134 | * List of types and parsing rules for future extensions: |
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| 135 | * http://www.w3.org/TR/REC-html40/types.html |
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| 136 | * screen, tty, tv, projection, handheld, print, braille, aural, all |
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| 137 | * The following are non standard extensions for undocumented specific environments. |
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| 138 | * static, visual, bitmap, paged |
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| 139 | * Note, even though the generated pdf file is intended for print output, |
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| 140 | * the desired content might be different (e.g. screen or projection view of html file). |
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| 141 | * Therefore allow specification of content by dompdf setting DOMPDF_DEFAULT_MEDIA_TYPE. |
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| 142 | * If given, replace media "print" by DOMPDF_DEFAULT_MEDIA_TYPE. |
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| 143 | * (Previous version $ACCEPTED_MEDIA_TYPES = $ACCEPTED_GENERIC_MEDIA_TYPES + $ACCEPTED_DEFAULT_MEDIA_TYPE) |
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| 144 | */ |
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| 145 | static $ACCEPTED_DEFAULT_MEDIA_TYPE = "print"; |
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| 146 | static $ACCEPTED_GENERIC_MEDIA_TYPES = array("all", "static", "visual", "bitmap", "paged"); |
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| 147 | |
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| 148 | /** |
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| 149 | * The class constructor. |
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| 150 | * |
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| 151 | * The base protocol, host & path are initialized to those of |
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| 152 | * the current script. |
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| 153 | */ |
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| 154 | function __construct() { |
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| 155 | $this->_styles = array(); |
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| 156 | $this->_loaded_files = array(); |
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| 157 | list($this->_protocol, $this->_base_host, $this->_base_path) = explode_url($_SERVER["SCRIPT_FILENAME"]); |
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| 158 | $this->_page_style = null; |
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| 159 | } |
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| 160 | |
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| 161 | /** |
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| 162 | * Set the base protocol |
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| 163 | * |
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| 164 | * @param string $proto |
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| 165 | */ |
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| 166 | function set_protocol($proto) { $this->_protocol = $proto; } |
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| 167 | |
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| 168 | /** |
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| 169 | * Set the base host |
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| 170 | * |
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| 171 | * @param string $host |
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| 172 | */ |
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| 173 | function set_host($host) { $this->_base_host = $host; } |
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| 174 | |
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| 175 | /** |
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| 176 | * Set the base path |
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| 177 | * |
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| 178 | * @param string $path |
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| 179 | */ |
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| 180 | function set_base_path($path) { $this->_base_path = $path; } |
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| 181 | |
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| 182 | |
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| 183 | /** |
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| 184 | * Return the base protocol for this stylesheet |
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| 185 | * |
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| 186 | * @return string |
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| 187 | */ |
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| 188 | function get_protocol() { return $this->_protocol; } |
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| 189 | |
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| 190 | /** |
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| 191 | * Return the base host for this stylesheet |
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| 192 | * |
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| 193 | * @return string |
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| 194 | */ |
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| 195 | function get_host() { return $this->_base_host; } |
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| 196 | |
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| 197 | /** |
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| 198 | * Return the base path for this stylesheet |
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| 199 | * |
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| 200 | * @return string |
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| 201 | */ |
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| 202 | function get_base_path() { return $this->_base_path; } |
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| 203 | |
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| 204 | /** |
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| 205 | * add a new Style object to the stylesheet |
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| 206 | * |
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| 207 | * add_style() adds a new Style object to the current stylesheet, or |
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| 208 | * merges a new Style with an existing one. |
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| 209 | * |
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| 210 | * @param string $key the Style's selector |
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| 211 | * @param Style $style the Style to be added |
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| 212 | */ |
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| 213 | function add_style($key, Style $style) { |
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| 214 | if (!is_string($key)) |
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| 215 | throw new DOMPDF_Exception("CSS rule must be keyed by a string."); |
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| 216 | |
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| 217 | if ( isset($this->_styles[$key]) ) |
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| 218 | $this->_styles[$key]->merge($style); |
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| 219 | else |
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| 220 | $this->_styles[$key] = clone $style; |
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| 221 | } |
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| 222 | |
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| 223 | |
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| 224 | /** |
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| 225 | * lookup a specifc Style object |
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| 226 | * |
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| 227 | * lookup() returns the Style specified by $key, or null if the Style is |
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| 228 | * not found. |
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| 229 | * |
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| 230 | * @param string $key the selector of the requested Style |
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| 231 | * @return Style |
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| 232 | */ |
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| 233 | function lookup($key) { |
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| 234 | if ( !isset($this->_styles[$key]) ) |
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| 235 | return null; |
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| 236 | |
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| 237 | return $this->_styles[$key]; |
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| 238 | } |
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| 239 | |
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| 240 | /** |
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| 241 | * create a new Style object associated with this stylesheet |
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| 242 | * |
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| 243 | * @param Style $parent The style of this style's parent in the DOM tree |
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| 244 | * @return Style |
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| 245 | */ |
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| 246 | function create_style($parent = null) { |
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| 247 | return new Style($this, $parent); |
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| 248 | } |
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| 249 | |
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| 250 | |
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| 251 | /** |
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| 252 | * load and parse a CSS string |
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| 253 | * |
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| 254 | * @param string $css |
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| 255 | */ |
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| 256 | function load_css(&$css) { $this->_parse_css($css); } |
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| 257 | |
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| 258 | |
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| 259 | /** |
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| 260 | * load and parse a CSS file |
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| 261 | * |
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| 262 | * @param string $file |
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| 263 | */ |
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| 264 | function load_css_file($file) { |
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| 265 | global $_dompdf_warnings; |
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| 266 | |
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| 267 | // Prevent circular references |
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| 268 | if ( isset($this->_loaded_files[$file]) ) |
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| 269 | return; |
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| 270 | |
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| 271 | $this->_loaded_files[$file] = true; |
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| 272 | $parsed_url = explode_url($file); |
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| 273 | |
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| 274 | list($this->_protocol, $this->_base_host, $this->_base_path, $filename) = $parsed_url; |
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| 275 | |
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| 276 | if ( !DOMPDF_ENABLE_REMOTE && |
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| 277 | ($this->_protocol != "" && $this->_protocol != "file://") ) { |
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| 278 | record_warnings(E_USER_WARNING, "Remote CSS file '$file' requested, but DOMPDF_ENABLE_REMOTE is false.", __FILE__, __LINE__); |
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| 279 | return; |
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| 280 | } |
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| 281 | |
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| 282 | // Fix submitted by Nick Oostveen for aliased directory support: |
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| 283 | if ( $this->_protocol == "" ) |
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| 284 | $file = $this->_base_path . $filename; |
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| 285 | else |
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| 286 | $file = build_url($this->_protocol, $this->_base_host, $this->_base_path, $filename); |
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| 287 | |
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| 288 | set_error_handler("record_warnings"); |
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| 289 | $css = file_get_contents($file); |
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| 290 | restore_error_handler(); |
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| 291 | |
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| 292 | if ( $css == "" ) { |
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| 293 | record_warnings(E_USER_WARNING, "Unable to load css file $file", __FILE__, __LINE__);; |
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| 294 | return; |
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| 295 | } |
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| 296 | |
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| 297 | $this->_parse_css($css); |
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| 298 | |
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| 299 | } |
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| 300 | |
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| 301 | /** |
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| 302 | * @link http://www.w3.org/TR/CSS21/cascade.html#specificity} |
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| 303 | * |
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| 304 | * @param string $selector |
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| 305 | * @return int |
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| 306 | */ |
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| 307 | private function _specificity($selector) { |
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| 308 | // http://www.w3.org/TR/CSS21/cascade.html#specificity |
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| 309 | // ignoring the ":" pseudoclass modifyers |
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| 310 | // also ignored in _css_selector_to_xpath |
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| 311 | |
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| 312 | $a = ($selector === "!style attribute") ? 1 : 0; |
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| 313 | |
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| 314 | $b = min(mb_substr_count($selector, "#"), 255); |
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| 315 | |
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| 316 | $c = min(mb_substr_count($selector, ".") + |
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| 317 | mb_substr_count($selector, ">") + |
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| 318 | mb_substr_count($selector, "+"), 255); |
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| 319 | |
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| 320 | $d = min(mb_substr_count($selector, " "), 255); |
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| 321 | |
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| 322 | //If a normal element name is at the begining of the string, |
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| 323 | //a leading whitespace might have been removed on whitespace collapsing and removal |
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| 324 | //therefore there might be one whitespace less as selected element names |
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| 325 | //this can lead to a too small specificity |
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| 326 | //see _css_selector_to_xpath |
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| 327 | |
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| 328 | if ( !in_array($selector{0}, array(" ", ">", ".", "#", "+", ":", "[")) ) { |
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| 329 | $d++; |
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| 330 | } |
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| 331 | |
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| 332 | if (DEBUGCSS) { |
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| 333 | /*DEBUGCSS*/ print "<pre>\n"; |
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| 334 | /*DEBUGCSS*/ printf("_specificity(): 0x%08x \"%s\"\n", ($a << 24) | ($b << 16) | ($c << 8) | ($d), $selector); |
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| 335 | /*DEBUGCSS*/ print "</pre>"; |
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| 336 | } |
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| 337 | |
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| 338 | return ($a << 24) | ($b << 16) | ($c << 8) | ($d); |
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| 339 | } |
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| 340 | |
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| 341 | |
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| 342 | /** |
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| 343 | * converts a CSS selector to an XPath query. |
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| 344 | * |
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| 345 | * @param string $selector |
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| 346 | * @return string |
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| 347 | */ |
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| 348 | private function _css_selector_to_xpath($selector) { |
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| 349 | |
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| 350 | // Collapse white space and strip whitespace around delimiters |
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| 351 | // $search = array("/\\s+/", "/\\s+([.>#+:])\\s+/"); |
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| 352 | // $replace = array(" ", "\\1"); |
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| 353 | // $selector = preg_replace($search, $replace, trim($selector)); |
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| 354 | |
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| 355 | // Initial query (non-absolute) |
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| 356 | $query = "//"; |
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| 357 | |
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| 358 | // Parse the selector |
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| 359 | //$s = preg_split("/([ :>.#+])/", $selector, -1, PREG_SPLIT_DELIM_CAPTURE); |
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| 360 | |
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| 361 | $delimiters = array(" ", ">", ".", "#", "+", ":", "["); |
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| 362 | |
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| 363 | // Add an implicit space at the beginning of the selector if there is no |
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| 364 | // delimiter there already. |
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| 365 | if ( !in_array($selector{0}, $delimiters) ) |
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| 366 | $selector = " $selector"; |
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| 367 | |
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| 368 | $tok = ""; |
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| 369 | $len = mb_strlen($selector); |
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| 370 | $i = 0; |
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| 371 | |
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| 372 | while ( $i < $len ) { |
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| 373 | |
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| 374 | $s = $selector{$i}; |
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| 375 | $i++; |
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| 376 | |
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| 377 | // Eat characters up to the next delimiter |
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| 378 | $tok = ""; |
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| 379 | |
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| 380 | while ($i < $len) { |
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| 381 | if ( in_array($selector{$i}, $delimiters) ) |
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| 382 | break; |
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| 383 | $tok .= $selector{$i++}; |
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| 384 | } |
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| 385 | |
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| 386 | switch ($s) { |
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| 387 | |
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| 388 | case " ": |
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| 389 | case ">": |
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| 390 | // All elements matching the next token that are direct children of |
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| 391 | // the current token |
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| 392 | $expr = $s == " " ? "descendant" : "child"; |
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| 393 | |
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| 394 | if ( mb_substr($query, -1, 1) != "/" ) |
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| 395 | $query .= "/"; |
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| 396 | |
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| 397 | if ( !$tok ) |
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| 398 | $tok = "*"; |
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| 399 | |
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| 400 | $query .= "$expr::$tok"; |
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| 401 | $tok = ""; |
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| 402 | break; |
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| 403 | |
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| 404 | case ".": |
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| 405 | case "#": |
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| 406 | // All elements matching the current token with a class/id equal to |
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| 407 | // the _next_ token. |
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| 408 | |
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| 409 | $attr = $s == "." ? "class" : "id"; |
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| 410 | |
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| 411 | // empty class/id == * |
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| 412 | if ( mb_substr($query, -1, 1) == "/" ) |
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| 413 | $query .= "*"; |
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| 414 | |
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| 415 | // Match multiple classes: $tok contains the current selected |
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| 416 | // class. Search for class attributes with class="$tok", |
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| 417 | // class=".* $tok .*" and class=".* $tok" |
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| 418 | |
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| 419 | // This doesn't work because libxml only supports XPath 1.0... |
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| 420 | //$query .= "[matches(@$attr,\"^${tok}\$|^${tok}[ ]+|[ ]+${tok}\$|[ ]+${tok}[ ]+\")]"; |
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| 421 | |
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| 422 | // Query improvement by Michael Sheakoski <michael@mjsdigital.com>: |
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| 423 | $query .= "[contains(concat(' ', @$attr, ' '), concat(' ', '$tok', ' '))]"; |
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| 424 | $tok = ""; |
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| 425 | break; |
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| 426 | |
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| 427 | case "+": |
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| 428 | // All sibling elements that folow the current token |
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| 429 | if ( mb_substr($query, -1, 1) != "/" ) |
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| 430 | $query .= "/"; |
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| 431 | |
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| 432 | $query .= "following-sibling::$tok"; |
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| 433 | $tok = ""; |
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| 434 | break; |
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| 435 | |
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| 436 | case ":": |
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| 437 | // Pseudo-classes |
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| 438 | switch ($tok) { |
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| 439 | |
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| 440 | case "first-child": |
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| 441 | $query .= "[1]"; |
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| 442 | $tok = ""; |
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| 443 | break; |
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| 444 | |
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| 445 | case "link": |
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| 446 | $query .= "[@href]"; |
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| 447 | $tok = ""; |
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| 448 | break; |
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| 449 | |
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| 450 | case "first-line": |
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| 451 | break; |
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| 452 | |
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| 453 | case "first-letter": |
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| 454 | break; |
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| 455 | |
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| 456 | case "before": |
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| 457 | break; |
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| 458 | |
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| 459 | case "after": |
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| 460 | break; |
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| 461 | |
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| 462 | } |
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| 463 | |
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| 464 | break; |
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| 465 | |
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| 466 | case "[": |
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| 467 | // Attribute selectors. All with an attribute matching the following token(s) |
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| 468 | $attr_delimiters = array("=", "]", "~", "|"); |
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| 469 | $tok_len = mb_strlen($tok); |
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| 470 | $j = 0; |
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| 471 | |
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| 472 | $attr = ""; |
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| 473 | $op = ""; |
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| 474 | $value = ""; |
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| 475 | |
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| 476 | while ( $j < $tok_len ) { |
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| 477 | if ( in_array($tok{$j}, $attr_delimiters) ) |
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| 478 | break; |
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| 479 | $attr .= $tok{$j++}; |
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| 480 | } |
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| 481 | |
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| 482 | switch ( $tok{$j} ) { |
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| 483 | |
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| 484 | case "~": |
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| 485 | case "|": |
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| 486 | $op .= $tok{$j++}; |
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| 487 | |
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| 488 | if ( $tok{$j} != "=" ) |
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| 489 | throw new DOMPDF_Exception("Invalid CSS selector syntax: invalid attribute selector: $selector"); |
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| 490 | |
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| 491 | $op .= $tok{$j}; |
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| 492 | break; |
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| 493 | |
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| 494 | case "=": |
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| 495 | $op = "="; |
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| 496 | break; |
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| 497 | |
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| 498 | } |
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| 499 | |
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| 500 | // Read the attribute value, if required |
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| 501 | if ( $op != "" ) { |
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| 502 | $j++; |
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| 503 | while ( $j < $tok_len ) { |
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| 504 | if ( $tok{$j} == "]" ) |
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| 505 | break; |
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| 506 | $value .= $tok{$j++}; |
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| 507 | } |
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| 508 | } |
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| 509 | |
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| 510 | if ( $attr == "" ) |
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| 511 | throw new DOMPDF_Exception("Invalid CSS selector syntax: missing attribute name"); |
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| 512 | |
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| 513 | switch ( $op ) { |
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| 514 | |
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| 515 | case "": |
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| 516 | $query .= "[@$attr]"; |
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| 517 | break; |
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| 518 | |
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| 519 | case "=": |
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| 520 | $query .= "[@$attr$op\"$value\"]"; |
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| 521 | break; |
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| 522 | |
---|
| 523 | case "~=": |
---|
| 524 | // FIXME: this will break if $value contains quoted strings |
---|
| 525 | // (e.g. [type~="a b c" "d e f"]) |
---|
| 526 | $values = explode(" ", $value); |
---|
| 527 | $query .= "["; |
---|
| 528 | |
---|
| 529 | foreach ( $values as $val ) |
---|
| 530 | $query .= "@$attr=\"$val\" or "; |
---|
| 531 | |
---|
| 532 | $query = rtrim($query, " or ") . "]"; |
---|
| 533 | break; |
---|
| 534 | |
---|
| 535 | case "|=": |
---|
| 536 | $values = explode("-", $value); |
---|
| 537 | $query .= "["; |
---|
| 538 | |
---|
| 539 | foreach ($values as $val) |
---|
| 540 | $query .= "starts-with(@$attr, \"$val\") or "; |
---|
| 541 | |
---|
| 542 | $query = rtrim($query, " or ") . "]"; |
---|
| 543 | break; |
---|
| 544 | |
---|
| 545 | } |
---|
| 546 | |
---|
| 547 | break; |
---|
| 548 | } |
---|
| 549 | } |
---|
| 550 | $i++; |
---|
| 551 | |
---|
| 552 | // case ":": |
---|
| 553 | // // Pseudo selectors: ignore for now. Partially handled directly |
---|
| 554 | // // below. |
---|
| 555 | |
---|
| 556 | // // Skip until the next special character, leaving the token as-is |
---|
| 557 | // while ( $i < $len ) { |
---|
| 558 | // if ( in_array($selector{$i}, $delimiters) ) |
---|
| 559 | // break; |
---|
| 560 | // $i++; |
---|
| 561 | // } |
---|
| 562 | // break; |
---|
| 563 | |
---|
| 564 | // default: |
---|
| 565 | // // Add the character to the token |
---|
| 566 | // $tok .= $selector{$i++}; |
---|
| 567 | // break; |
---|
| 568 | // } |
---|
| 569 | |
---|
| 570 | // } |
---|
| 571 | |
---|
| 572 | |
---|
| 573 | // Trim the trailing '/' from the query |
---|
| 574 | if ( mb_strlen($query) > 2 ) |
---|
| 575 | $query = rtrim($query, "/"); |
---|
| 576 | |
---|
| 577 | return $query; |
---|
| 578 | } |
---|
| 579 | |
---|
| 580 | /** |
---|
| 581 | * applies all current styles to a particular document tree |
---|
| 582 | * |
---|
| 583 | * apply_styles() applies all currently loaded styles to the provided |
---|
| 584 | * {@link Frame_Tree}. Aside from parsing CSS, this is the main purpose |
---|
| 585 | * of this class. |
---|
| 586 | * |
---|
| 587 | * @param Frame_Tree $tree |
---|
| 588 | */ |
---|
| 589 | function apply_styles(Frame_Tree $tree) { |
---|
| 590 | |
---|
| 591 | // Use XPath to select nodes. This would be easier if we could attach |
---|
| 592 | // Frame objects directly to DOMNodes using the setUserData() method, but |
---|
| 593 | // we can't do that just yet. Instead, we set a _node attribute_ in |
---|
| 594 | // Frame->set_id() and use that as a handle on the Frame object via |
---|
| 595 | // Frame_Tree::$_registry. |
---|
| 596 | |
---|
| 597 | // We create a scratch array of styles indexed by frame id. Once all |
---|
| 598 | // styles have been assigned, we order the cached styles by specificity |
---|
| 599 | // and create a final style object to assign to the frame. |
---|
| 600 | |
---|
| 601 | // FIXME: this is not particularly robust... |
---|
| 602 | |
---|
| 603 | $styles = array(); |
---|
| 604 | $xp = new DOMXPath($tree->get_dom()); |
---|
| 605 | |
---|
| 606 | // Apply all styles in stylesheet |
---|
| 607 | foreach ($this->_styles as $selector => $style) { |
---|
| 608 | |
---|
| 609 | $query = $this->_css_selector_to_xpath($selector); |
---|
| 610 | // pre_var_dump($selector); |
---|
| 611 | // pre_var_dump($query); |
---|
| 612 | // echo ($style); |
---|
| 613 | |
---|
| 614 | // Retrieve the nodes |
---|
| 615 | $nodes = $xp->query($query); |
---|
| 616 | |
---|
| 617 | foreach ($nodes as $node) { |
---|
| 618 | //echo $node->nodeName . "\n"; |
---|
| 619 | // Retrieve the node id |
---|
| 620 | if ( $node->nodeType != 1 ) // Only DOMElements get styles |
---|
| 621 | continue; |
---|
| 622 | |
---|
| 623 | $id = $node->getAttribute("frame_id"); |
---|
| 624 | |
---|
| 625 | // Assign the current style to the scratch array |
---|
| 626 | $spec = $this->_specificity($selector); |
---|
| 627 | $styles[$id][$spec][] = $style; |
---|
| 628 | } |
---|
| 629 | } |
---|
| 630 | |
---|
| 631 | // Now create the styles and assign them to the appropriate frames. (We |
---|
| 632 | // iterate over the tree using an implicit Frame_Tree iterator.) |
---|
| 633 | $root_flg = false; |
---|
| 634 | foreach ($tree->get_frames() as $frame) { |
---|
| 635 | // pre_r($frame->get_node()->nodeName . ":"); |
---|
| 636 | if ( !$root_flg && $this->_page_style ) { |
---|
| 637 | $style = $this->_page_style; |
---|
| 638 | $root_flg = true; |
---|
| 639 | } else |
---|
| 640 | $style = $this->create_style(); |
---|
| 641 | |
---|
| 642 | // Find nearest DOMElement parent |
---|
| 643 | $p = $frame; |
---|
| 644 | while ( $p = $p->get_parent() ) |
---|
| 645 | if ($p->get_node()->nodeType == 1 ) |
---|
| 646 | break; |
---|
| 647 | |
---|
| 648 | // Styles can only be applied directly to DOMElements; anonymous |
---|
| 649 | // frames inherit from their parent |
---|
| 650 | if ( $frame->get_node()->nodeType != 1 ) { |
---|
| 651 | if ( $p ) |
---|
| 652 | $style->inherit($p->get_style()); |
---|
| 653 | $frame->set_style($style); |
---|
| 654 | continue; |
---|
| 655 | } |
---|
| 656 | |
---|
| 657 | $id = $frame->get_id(); |
---|
| 658 | |
---|
| 659 | // Handle HTML 4.0 attributes |
---|
| 660 | Attribute_Translator::translate_attributes($frame); |
---|
| 661 | |
---|
| 662 | // Locate any additional style attributes |
---|
| 663 | if ( ($str = $frame->get_node()->getAttribute("style")) !== "" ) { |
---|
| 664 | $spec = $this->_specificity("!style attribute"); |
---|
| 665 | $styles[$id][$spec][] = $this->_parse_properties($str); |
---|
| 666 | } |
---|
| 667 | |
---|
| 668 | // Grab the applicable styles |
---|
| 669 | if ( isset($styles[$id]) ) { |
---|
| 670 | |
---|
| 671 | $applied_styles = $styles[ $frame->get_id() ]; |
---|
| 672 | |
---|
| 673 | // Sort by specificity |
---|
| 674 | ksort($applied_styles); |
---|
| 675 | |
---|
| 676 | if (DEBUGCSS) { |
---|
| 677 | $debug_nodename = $frame->get_node()->nodeName; |
---|
| 678 | print "<pre>\n[$debug_nodename\n"; |
---|
| 679 | foreach ($applied_styles as $spec => $arr) { |
---|
| 680 | printf("specificity: 0x%08x\n",$spec); |
---|
| 681 | foreach ($arr as $s) { |
---|
| 682 | print "[\n"; |
---|
| 683 | $s->debug_print(); |
---|
| 684 | print "]\n"; |
---|
| 685 | } |
---|
| 686 | } |
---|
| 687 | } |
---|
| 688 | |
---|
| 689 | // Merge the new styles with the inherited styles |
---|
| 690 | foreach ($applied_styles as $arr) { |
---|
| 691 | foreach ($arr as $s) |
---|
| 692 | $style->merge($s); |
---|
| 693 | } |
---|
| 694 | } |
---|
| 695 | |
---|
| 696 | // Inherit parent's styles if required |
---|
| 697 | if ( $p ) { |
---|
| 698 | |
---|
| 699 | if (DEBUGCSS) { |
---|
| 700 | print "inherit:\n"; |
---|
| 701 | print "[\n"; |
---|
| 702 | $p->get_style()->debug_print(); |
---|
| 703 | print "]\n"; |
---|
| 704 | } |
---|
| 705 | |
---|
| 706 | $style->inherit( $p->get_style() ); |
---|
| 707 | } |
---|
| 708 | |
---|
| 709 | if (DEBUGCSS) { |
---|
| 710 | print "DomElementStyle:\n"; |
---|
| 711 | print "[\n"; |
---|
| 712 | $style->debug_print(); |
---|
| 713 | print "]\n"; |
---|
| 714 | print "/$debug_nodename]\n</pre>"; |
---|
| 715 | } |
---|
| 716 | |
---|
| 717 | /*DEBUGCSS print: see below different print debugging method |
---|
| 718 | pre_r($frame->get_node()->nodeName . ":"); |
---|
| 719 | echo "<pre>"; |
---|
| 720 | echo $style; |
---|
| 721 | echo "</pre>";*/ |
---|
| 722 | $frame->set_style($style); |
---|
| 723 | |
---|
| 724 | } |
---|
| 725 | |
---|
| 726 | // We're done! Clean out the registry of all styles since we |
---|
| 727 | // won't be needing this later. |
---|
| 728 | foreach ( array_keys($this->_styles) as $key ) { |
---|
| 729 | unset($this->_styles[$key]); |
---|
| 730 | } |
---|
| 731 | |
---|
| 732 | } |
---|
| 733 | |
---|
| 734 | |
---|
| 735 | /** |
---|
| 736 | * parse a CSS string using a regex parser |
---|
| 737 | * |
---|
| 738 | * Called by {@link Stylesheet::parse_css()} |
---|
| 739 | * |
---|
| 740 | * @param string $str |
---|
| 741 | */ |
---|
| 742 | private function _parse_css($str) { |
---|
| 743 | |
---|
| 744 | // Destroy comments |
---|
| 745 | $css = preg_replace("'/\*.*?\*/'si", "", $str); |
---|
| 746 | |
---|
| 747 | // FIXME: handle '{' within strings, e.g. [attr="string {}"] |
---|
| 748 | |
---|
| 749 | // Something more legible: |
---|
| 750 | $re = |
---|
| 751 | "/\s* # Skip leading whitespace \n". |
---|
| 752 | "( @([^\s]+)\s+([^{;]*) (?:;|({)) )? # Match @rules followed by ';' or '{' \n". |
---|
| 753 | "(?(1) # Only parse sub-sections if we're in an @rule... \n". |
---|
| 754 | " (?(4) # ...and if there was a leading '{' \n". |
---|
| 755 | " \s*( (?:(?>[^{}]+) ({)? # Parse rulesets and individual @page rules \n". |
---|
| 756 | " (?(6) (?>[^}]*) }) \s*)+? \n". |
---|
| 757 | " ) \n". |
---|
| 758 | " }) # Balancing '}' \n". |
---|
| 759 | "| # Branch to match regular rules (not preceeded by '@')\n". |
---|
| 760 | "([^{]*{[^}]*})) # Parse normal rulesets\n". |
---|
| 761 | "/xs"; |
---|
| 762 | |
---|
| 763 | if ( preg_match_all($re, $css, $matches, PREG_SET_ORDER) === false ) |
---|
| 764 | // An error occured |
---|
| 765 | throw new DOMPDF_Exception("Error parsing css file: preg_match_all() failed."); |
---|
| 766 | |
---|
| 767 | // After matching, the array indicies are set as follows: |
---|
| 768 | // |
---|
| 769 | // [0] => complete text of match |
---|
| 770 | // [1] => contains '@import ...;' or '@media {' if applicable |
---|
| 771 | // [2] => text following @ for cases where [1] is set |
---|
| 772 | // [3] => media types or full text following '@import ...;' |
---|
| 773 | // [4] => '{', if present |
---|
| 774 | // [5] => rulesets within media rules |
---|
| 775 | // [6] => '{', within media rules |
---|
| 776 | // [7] => individual rules, outside of media rules |
---|
| 777 | // |
---|
| 778 | //pre_r($matches); |
---|
| 779 | foreach ( $matches as $match ) { |
---|
| 780 | $match[2] = trim($match[2]); |
---|
| 781 | |
---|
| 782 | if ( $match[2] !== "" ) { |
---|
| 783 | // Handle @rules |
---|
| 784 | switch ($match[2]) { |
---|
| 785 | |
---|
| 786 | case "import": |
---|
| 787 | $this->_parse_import($match[3]); |
---|
| 788 | break; |
---|
| 789 | |
---|
| 790 | case "media": |
---|
| 791 | $acceptedmedia = self::$ACCEPTED_GENERIC_MEDIA_TYPES; |
---|
| 792 | if ( defined("DOMPDF_DEFAULT_MEDIA_TYPE") ) { |
---|
| 793 | $acceptedmedia[] = DOMPDF_DEFAULT_MEDIA_TYPE; |
---|
| 794 | } else { |
---|
| 795 | $acceptedmedia[] = self::$ACCEPTED_DEFAULT_MEDIA_TYPE; |
---|
| 796 | } |
---|
| 797 | if ( in_array(mb_strtolower(trim($match[3])), $acceptedmedia ) ) { |
---|
| 798 | $this->_parse_sections($match[5]); |
---|
| 799 | } |
---|
| 800 | break; |
---|
| 801 | |
---|
| 802 | case "page": |
---|
| 803 | //This handles @page to be applied to page oriented media |
---|
| 804 | //Note: This has a reduced syntax: |
---|
| 805 | //@page { margin:1cm; color:blue; } |
---|
| 806 | //Not a sequence of styles like a full.css, but only the properties |
---|
| 807 | //of a single style, which is applied to the very first "root" frame before |
---|
| 808 | //processing other styles of the frame. |
---|
| 809 | //Working properties: |
---|
| 810 | // margin (for margin around edge of paper) |
---|
| 811 | // font-family (default font of pages) |
---|
| 812 | // color (default text color of pages) |
---|
| 813 | //Non working properties: |
---|
| 814 | // border |
---|
| 815 | // padding |
---|
| 816 | // background-color |
---|
| 817 | //Todo:Reason is unknown |
---|
| 818 | //Other properties (like further font or border attributes) not tested. |
---|
| 819 | //If a border or background color around each paper sheet is desired, |
---|
| 820 | //assign it to the <body> tag, possibly only for the css of the correct media type. |
---|
| 821 | |
---|
| 822 | // Store the style for later... |
---|
| 823 | if ( is_null($this->_page_style) ) |
---|
| 824 | $this->_page_style = $this->_parse_properties($match[5]); |
---|
| 825 | else |
---|
| 826 | $this->_page_style->merge($this->_parse_properties($match[5])); |
---|
| 827 | break; |
---|
| 828 | |
---|
| 829 | default: |
---|
| 830 | // ignore everything else |
---|
| 831 | break; |
---|
| 832 | } |
---|
| 833 | |
---|
| 834 | continue; |
---|
| 835 | } |
---|
| 836 | |
---|
| 837 | if ( $match[7] !== "" ) |
---|
| 838 | $this->_parse_sections($match[7]); |
---|
| 839 | |
---|
| 840 | } |
---|
| 841 | } |
---|
| 842 | |
---|
| 843 | /* See also style.cls Style::_image(), refactoring?, works also for imported css files */ |
---|
| 844 | protected function _image($val) { |
---|
| 845 | $DEBUGCSS=DEBUGCSS; |
---|
| 846 | |
---|
| 847 | if ( mb_strpos($val, "url") === false ) { |
---|
| 848 | $path = "none"; //Don't resolve no image -> otherwise would prefix path and no longer recognize as none |
---|
| 849 | } |
---|
| 850 | else { |
---|
| 851 | $val = preg_replace("/url\(['\"]?([^'\")]+)['\"]?\)/","\\1", trim($val)); |
---|
| 852 | |
---|
| 853 | // Resolve the url now in the context of the current stylesheet |
---|
| 854 | $parsed_url = explode_url($val); |
---|
| 855 | if ( $parsed_url["protocol"] == "" && $this->get_protocol() == "" ) { |
---|
| 856 | if ($parsed_url["path"]{0} == '/' || $parsed_url["path"]{0} == '\\' ) { |
---|
| 857 | $path = $_SERVER["DOCUMENT_ROOT"].'/'; |
---|
| 858 | } else { |
---|
| 859 | $path = $this->get_base_path(); |
---|
| 860 | } |
---|
| 861 | $path .= $parsed_url["path"] . $parsed_url["file"]; |
---|
| 862 | $path = dompdf_realpath($path); |
---|
| 863 | } else { |
---|
| 864 | $path = build_url($this->get_protocol(), |
---|
| 865 | $this->get_host(), |
---|
| 866 | $this->get_base_path(), |
---|
| 867 | $val); |
---|
| 868 | } |
---|
| 869 | } |
---|
| 870 | if ($DEBUGCSS) { |
---|
| 871 | print "<pre>[_image\n"; |
---|
| 872 | print_r($parsed_url); |
---|
| 873 | print $this->get_protocol()."\n".$this->get_base_path()."\n".$path."\n"; |
---|
| 874 | print "_image]</pre>";; |
---|
| 875 | } |
---|
| 876 | return $path; |
---|
| 877 | } |
---|
| 878 | |
---|
| 879 | /** |
---|
| 880 | * parse @import{} sections |
---|
| 881 | * |
---|
| 882 | * @param string $url the url of the imported CSS file |
---|
| 883 | */ |
---|
| 884 | private function _parse_import($url) { |
---|
| 885 | $arr = preg_split("/[\s\n,]/", $url,-1, PREG_SPLIT_NO_EMPTY); |
---|
| 886 | $url = array_shift($arr); |
---|
| 887 | $accept = false; |
---|
| 888 | |
---|
| 889 | if ( count($arr) > 0 ) { |
---|
| 890 | |
---|
| 891 | $acceptedmedia = self::$ACCEPTED_GENERIC_MEDIA_TYPES; |
---|
| 892 | if ( defined("DOMPDF_DEFAULT_MEDIA_TYPE") ) { |
---|
| 893 | $acceptedmedia[] = DOMPDF_DEFAULT_MEDIA_TYPE; |
---|
| 894 | } else { |
---|
| 895 | $acceptedmedia[] = self::$ACCEPTED_DEFAULT_MEDIA_TYPE; |
---|
| 896 | } |
---|
| 897 | |
---|
| 898 | // @import url media_type [media_type...] |
---|
| 899 | foreach ( $arr as $type ) { |
---|
| 900 | if ( in_array(mb_strtolower(trim($type)), $acceptedmedia) ) { |
---|
| 901 | $accept = true; |
---|
| 902 | break; |
---|
| 903 | } |
---|
| 904 | } |
---|
| 905 | |
---|
| 906 | } else { |
---|
| 907 | // unconditional import |
---|
| 908 | $accept = true; |
---|
| 909 | } |
---|
| 910 | |
---|
| 911 | if ( $accept ) { |
---|
| 912 | // Store our current base url properties in case the new url is elsewhere |
---|
| 913 | $protocol = $this->_protocol; |
---|
| 914 | $host = $this->_base_host; |
---|
| 915 | $path = $this->_base_path; |
---|
| 916 | |
---|
| 917 | // $url = str_replace(array('"',"url", "(", ")"), "", $url); |
---|
| 918 | // If the protocol is php, assume that we will import using file:// |
---|
| 919 | // $url = build_url($protocol == "php://" ? "file://" : $protocol, $host, $path, $url); |
---|
| 920 | // Above does not work for subfolders and absolute urls. |
---|
| 921 | // Todo: As above, do we need to replace php or file to an empty protocol for local files? |
---|
| 922 | |
---|
| 923 | $url = $this->_image($url); |
---|
| 924 | |
---|
| 925 | $this->load_css_file($url); |
---|
| 926 | |
---|
| 927 | // Restore the current base url |
---|
| 928 | $this->_protocol = $protocol; |
---|
| 929 | $this->_base_host = $host; |
---|
| 930 | $this->_base_path = $path; |
---|
| 931 | } |
---|
| 932 | |
---|
| 933 | } |
---|
| 934 | |
---|
| 935 | /** |
---|
| 936 | * parse regular CSS blocks |
---|
| 937 | * |
---|
| 938 | * _parse_properties() creates a new Style object based on the provided |
---|
| 939 | * CSS rules. |
---|
| 940 | * |
---|
| 941 | * @param string $str CSS rules |
---|
| 942 | * @return Style |
---|
| 943 | */ |
---|
| 944 | private function _parse_properties($str) { |
---|
| 945 | $properties = explode(";", $str); |
---|
| 946 | |
---|
| 947 | if (DEBUGCSS) print '[_parse_properties'; |
---|
| 948 | |
---|
| 949 | // Create the style |
---|
| 950 | $style = new Style($this); |
---|
| 951 | foreach ($properties as $prop) { |
---|
| 952 | //A css property can have " ! important" appended (whitespace optional) |
---|
| 953 | //strip this off to decode core of the property correctly. |
---|
| 954 | //Pass on in the style to allow proper handling: |
---|
| 955 | //!important properties can only be overridden by other !important ones. |
---|
| 956 | //$style->$prop_name = is a shortcut of $style->__set($prop_name,$value);. |
---|
| 957 | //If no specific set function available, set _props["prop_name"] |
---|
| 958 | //style is always copied completely, or $_props handled separately |
---|
| 959 | //Therefore set a _important_props["prop_name"]=true to indicate the modifier |
---|
| 960 | |
---|
| 961 | /* Instead of short code, prefer the typical case with fast code |
---|
| 962 | $important = preg_match("/(.*?)!\s*important/",$prop,$match); |
---|
| 963 | if ( $important ) { |
---|
| 964 | $prop = $match[1]; |
---|
| 965 | } |
---|
| 966 | $prop = trim($prop); |
---|
| 967 | */ |
---|
| 968 | if (DEBUGCSS) print '('; |
---|
| 969 | $important = false; |
---|
| 970 | $prop = trim($prop); |
---|
| 971 | if (substr($prop,-9) == 'important') { |
---|
| 972 | $prop_tmp = rtrim(substr($prop,0,-9)); |
---|
| 973 | if (substr($prop_tmp,-1) == '!') { |
---|
| 974 | $prop = rtrim(substr($prop_tmp,0,-1)); |
---|
| 975 | $important = true; |
---|
| 976 | } |
---|
| 977 | } |
---|
| 978 | |
---|
| 979 | if ($prop == "") { |
---|
| 980 | if (DEBUGCSS) print 'empty)'; |
---|
| 981 | continue; |
---|
| 982 | } |
---|
| 983 | |
---|
| 984 | $i = mb_strpos($prop, ":"); |
---|
| 985 | if ( $i === false ) { |
---|
| 986 | if (DEBUGCSS) print 'novalue'.$prop.')'; |
---|
| 987 | continue; |
---|
| 988 | } |
---|
| 989 | |
---|
| 990 | $prop_name = rtrim(mb_strtolower(mb_substr($prop, 0, $i))); |
---|
| 991 | $value = ltrim(mb_substr($prop, $i+1)); |
---|
| 992 | if (DEBUGCSS) print $prop_name.':='.$value.($important?'!IMPORTANT':'').')'; |
---|
| 993 | //New style, anyway empty |
---|
| 994 | //if ($important || !$style->important_get($prop_name) ) { |
---|
| 995 | //$style->$prop_name = array($value,$important); |
---|
| 996 | //assignment might be replaced by overloading through __set, |
---|
| 997 | //and overloaded functions might check _important_props, |
---|
| 998 | //therefore set _important_props first. |
---|
| 999 | if ($important) { |
---|
| 1000 | $style->important_set($prop_name); |
---|
| 1001 | } |
---|
| 1002 | //For easier debugging, don't use overloading of assignments with __set |
---|
| 1003 | $style->$prop_name = $value; |
---|
| 1004 | //$style->props_set($prop_name, $value); |
---|
| 1005 | } |
---|
| 1006 | if (DEBUGCSS) print '_parse_properties]'; |
---|
| 1007 | |
---|
| 1008 | return $style; |
---|
| 1009 | } |
---|
| 1010 | |
---|
| 1011 | /** |
---|
| 1012 | * parse selector + rulesets |
---|
| 1013 | * |
---|
| 1014 | * @param string $str CSS selectors and rulesets |
---|
| 1015 | */ |
---|
| 1016 | private function _parse_sections($str) { |
---|
| 1017 | // Pre-process: collapse all whitespace and strip whitespace around '>', |
---|
| 1018 | // '.', ':', '+', '#' |
---|
| 1019 | |
---|
| 1020 | $patterns = array("/[\\s\n]+/", "/\\s+([>.:+#])\\s+/"); |
---|
| 1021 | $replacements = array(" ", "\\1"); |
---|
| 1022 | $str = preg_replace($patterns, $replacements, $str); |
---|
| 1023 | |
---|
| 1024 | $sections = explode("}", $str); |
---|
| 1025 | if (DEBUGCSS) print '[_parse_sections'; |
---|
| 1026 | foreach ($sections as $sect) { |
---|
| 1027 | $i = mb_strpos($sect, "{"); |
---|
| 1028 | |
---|
| 1029 | $selectors = explode(",", mb_substr($sect, 0, $i)); |
---|
| 1030 | if (DEBUGCSS) print '[section'; |
---|
| 1031 | $style = $this->_parse_properties(trim(mb_substr($sect, $i+1))); |
---|
| 1032 | |
---|
| 1033 | // Assign it to the selected elements |
---|
| 1034 | foreach ($selectors as $selector) { |
---|
| 1035 | $selector = trim($selector); |
---|
| 1036 | |
---|
| 1037 | if ($selector == "") { |
---|
| 1038 | if (DEBUGCSS) print '#empty#'; |
---|
| 1039 | continue; |
---|
| 1040 | } |
---|
| 1041 | if (DEBUGCSS) print '#'.$selector.'#'; |
---|
| 1042 | //if (DEBUGCSS) { if (strpos($selector,'p') !== false) print '!!!p!!!#'; } |
---|
| 1043 | |
---|
| 1044 | $this->add_style($selector, $style); |
---|
| 1045 | } |
---|
| 1046 | if (DEBUGCSS) print 'section]'; |
---|
| 1047 | } |
---|
| 1048 | if (DEBUGCSS) print '_parse_sections]'; |
---|
| 1049 | } |
---|
| 1050 | |
---|
| 1051 | /** |
---|
| 1052 | * dumps the entire stylesheet as a string |
---|
| 1053 | * |
---|
| 1054 | * Generates a string of each selector and associated style in the |
---|
| 1055 | * Stylesheet. Useful for debugging. |
---|
| 1056 | * |
---|
| 1057 | * @return string |
---|
| 1058 | */ |
---|
| 1059 | function __toString() { |
---|
| 1060 | $str = ""; |
---|
| 1061 | foreach ($this->_styles as $selector => $style) |
---|
| 1062 | $str .= "$selector => " . $style->__toString() . "\n"; |
---|
| 1063 | |
---|
| 1064 | return $str; |
---|
| 1065 | } |
---|
| 1066 | } |
---|
| 1067 | ?> |
---|