xref: /dokuwiki/lib/exe/js.php (revision 4b2c366d3e8bba9718d11bcc89925b237f120f2a) 
1<?php
2/**
3 * DokuWiki JavaScript creator
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8
9if(!defined('DOKU_INC')) define('DOKU_INC',dirname(__FILE__).'/../../');
10if(!defined('NOSESSION')) define('NOSESSION',true); // we do not use a session or authentication here (better caching)
11if(!defined('NL')) define('NL',"\n");
12if(!defined('DOKU_DISABLE_GZIP_OUTPUT')) define('DOKU_DISABLE_GZIP_OUTPUT',1); // we gzip ourself here
13require_once(DOKU_INC.'inc/init.php');
14
15// Main (don't run when UNIT test)
16if(!defined('SIMPLE_TEST')){
17    header('Content-Type: text/javascript; charset=utf-8');
18    js_out();
19}
20
21
22// ---------------------- functions ------------------------------
23
24/**
25 * Output all needed JavaScript
26 *
27 * @author Andreas Gohr <andi@splitbrain.org>
28 */
29function js_out(){
30    global $conf;
31    global $lang;
32    global $config_cascade;
33
34    // The generated script depends on some dynamic options
35    $cache = getCacheName('scripts'.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'],'.js');
36
37    // load minified version for some files
38    $min = $conf['compress'] ? '.min' : '';
39
40    // array of core files
41    $files = array(
42                DOKU_INC."lib/scripts/jquery/jquery$min.js",
43                DOKU_INC.'lib/scripts/jquery/jquery.cookie.js',
44                DOKU_INC."lib/scripts/jquery/jquery-ui$min.js",
45                DOKU_INC.'lib/scripts/helpers.js',
46                DOKU_INC.'lib/scripts/events.js',
47                DOKU_INC.'lib/scripts/delay.js',
48                DOKU_INC.'lib/scripts/cookie.js',
49                DOKU_INC.'lib/scripts/script.js',
50                DOKU_INC.'lib/scripts/tw-sack.js',
51                DOKU_INC.'lib/scripts/qsearch.js',
52                DOKU_INC.'lib/scripts/index.js',
53                DOKU_INC.'lib/scripts/drag.js',
54                DOKU_INC.'lib/scripts/textselection.js',
55                DOKU_INC.'lib/scripts/toolbar.js',
56                DOKU_INC.'lib/scripts/edit.js',
57                DOKU_INC.'lib/scripts/locktimer.js',
58                DOKU_INC.'lib/scripts/linkwiz.js',
59                DOKU_INC.'lib/scripts/media.js',
60                DOKU_INC.'lib/scripts/subscriptions.js',
61                DOKU_INC.'lib/scripts/compatibility.js',
62# disabled for FS#1958                DOKU_INC.'lib/scripts/hotkeys.js',
63                DOKU_TPLINC.'script.js',
64                DOKU_INC.'lib/scripts/behaviour.js',
65            );
66
67    // add possible plugin scripts and userscript
68    $files   = array_merge($files,js_pluginscripts());
69    if(isset($config_cascade['userscript']['default'])){
70        $files[] = $config_cascade['userscript']['default'];
71    }
72
73    // check cache age & handle conditional request
74    header('Cache-Control: public, max-age=3600');
75    header('Pragma: public');
76    if(js_cacheok($cache,$files)){
77        http_conditionalRequest(filemtime($cache));
78        if($conf['allowdebug']) header("X-CacheUsed: $cache");
79
80        // finally send output
81        if ($conf['gzip_output'] && http_gzip_valid($cache)) {
82            header('Vary: Accept-Encoding');
83            header('Content-Encoding: gzip');
84            readfile($cache.".gz");
85        } else {
86            if (!http_sendfile($cache)) readfile($cache);
87        }
88        return;
89    } else {
90        http_conditionalRequest(time());
91    }
92
93    // start output buffering and build the script
94    ob_start();
95
96    // add some global variables
97    print "var DOKU_BASE   = '".DOKU_BASE."';";
98    print "var DOKU_TPL    = '".DOKU_TPL."';";
99    print "var DOKU_UHN    = ".((int) useHeading('navigation')).";";
100    print "var DOKU_UHC    = ".((int) useHeading('content')).";";
101
102    // load JS specific translations
103    $json = new JSON();
104    $lang['js']['plugins'] = js_pluginstrings();
105    echo 'LANG = '.$json->encode($lang['js']).";\n";
106
107    // load toolbar
108    toolbar_JSdefines('toolbar');
109
110    // load files
111    foreach($files as $file){
112        echo "\n\n/* XXXXXXXXXX begin of ".str_replace(DOKU_INC, '', $file) ." XXXXXXXXXX */\n\n";
113        js_load($file);
114        echo "\n\n/* XXXXXXXXXX end of " . str_replace(DOKU_INC, '', $file) . " XXXXXXXXXX */\n\n";
115    }
116
117
118    // init stuff
119    js_runonstart("addEvent(document,'click',closePopups)");
120    js_runonstart('addTocToggle()');
121    js_runonstart("initSizeCtl('size__ctl','wiki__text')");
122    js_runonstart("initToolbar('tool__bar','wiki__text',toolbar)");
123    if($conf['locktime'] != 0){
124        js_runonstart("locktimer.init(".($conf['locktime'] - 60).",'".js_escape($lang['willexpire'])."',".$conf['usedraft'].", 'wiki__text')");
125    }
126    // init hotkeys - must have been done after init of toolbar
127# disabled for FS#1958    js_runonstart('initializeHotkeys()');
128
129    // end output buffering and get contents
130    $js = ob_get_contents();
131    ob_end_clean();
132
133    // compress whitespace and comments
134    if($conf['compress']){
135        $js = js_compress($js);
136    }
137
138    $js .= "\n"; // https://bugzilla.mozilla.org/show_bug.cgi?id=316033
139
140    // save cache file
141    io_saveFile($cache,$js);
142    if(function_exists('gzopen')) io_saveFile("$cache.gz",$js);
143
144    // finally send output
145    if ($conf['gzip_output']) {
146        header('Vary: Accept-Encoding');
147        header('Content-Encoding: gzip');
148        print gzencode($js,9,FORCE_GZIP);
149    } else {
150        print $js;
151    }
152}
153
154/**
155 * Load the given file, handle include calls and print it
156 *
157 * @author Andreas Gohr <andi@splitbrain.org>
158 */
159function js_load($file){
160    if(!@file_exists($file)) return;
161    static $loaded = array();
162
163    $data = io_readFile($file);
164    while(preg_match('#/\*\s*DOKUWIKI:include(_once)?\s+([\w\.\-_/]+)\s*\*/#',$data,$match)){
165        $ifile = $match[2];
166
167        // is it a include_once?
168        if($match[1]){
169            $base = basename($ifile);
170            if($loaded[$base]) continue;
171            $loaded[$base] = true;
172        }
173
174        if($ifile{0} != '/') $ifile = dirname($file).'/'.$ifile;
175
176        if(@file_exists($ifile)){
177            $idata = io_readFile($ifile);
178        }else{
179            $idata = '';
180        }
181        $data  = str_replace($match[0],$idata,$data);
182    }
183    echo "$data\n";
184}
185
186/**
187 * Checks if a JavaScript Cache file still is valid
188 *
189 * @author Andreas Gohr <andi@splitbrain.org>
190 */
191function js_cacheok($cache,$files){
192    if(isset($_REQUEST['purge'])) return false; //support purge request
193
194    $ctime = @filemtime($cache);
195    if(!$ctime) return false; //There is no cache
196
197    global $config_cascade;
198
199    // some additional files to check
200    $files = array_merge($files, getConfigFiles('main'));
201    $files[] = $config_cascade['userscript']['default'];
202    $files[] = __FILE__;
203
204    // now walk the files
205    foreach($files as $file){
206        if(@filemtime($file) > $ctime){
207            return false;
208        }
209    }
210    return true;
211}
212
213/**
214 * Returns a list of possible Plugin Scripts (no existance check here)
215 *
216 * @author Andreas Gohr <andi@splitbrain.org>
217 */
218function js_pluginscripts(){
219    $list = array();
220    $plugins = plugin_list();
221    foreach ($plugins as $p){
222        $list[] = DOKU_PLUGIN."$p/script.js";
223    }
224    return $list;
225}
226
227/**
228 * Return an two-dimensional array with strings from the language file of each plugin.
229 *
230 * - $lang['js'] must be an array.
231 * - Nothing is returned for plugins without an entry for $lang['js']
232 *
233 * @author Gabriel Birke <birke@d-scribe.de>
234 */
235function js_pluginstrings()
236{
237    global $conf;
238    $pluginstrings = array();
239    $plugins = plugin_list();
240    foreach ($plugins as $p){
241        if (isset($lang)) unset($lang);
242        if (@file_exists(DOKU_PLUGIN."$p/lang/en/lang.php")) {
243            include DOKU_PLUGIN."$p/lang/en/lang.php";
244        }
245        if (isset($conf['lang']) && $conf['lang']!='en' && @file_exists(DOKU_PLUGIN."$p/lang/".$conf['lang']."/lang.php")) {
246            include DOKU_PLUGIN."$p/lang/".$conf['lang']."/lang.php";
247        }
248        if (isset($lang['js'])) {
249            $pluginstrings[$p] = $lang['js'];
250        }
251    }
252    return $pluginstrings;
253}
254
255/**
256 * Escapes a String to be embedded in a JavaScript call, keeps \n
257 * as newline
258 *
259 * @author Andreas Gohr <andi@splitbrain.org>
260 */
261function js_escape($string){
262    return str_replace('\\\\n','\\n',addslashes($string));
263}
264
265/**
266 * Adds the given JavaScript code to the window.onload() event
267 *
268 * @author Andreas Gohr <andi@splitbrain.org>
269 */
270function js_runonstart($func){
271    echo "addInitEvent(function(){ $func; });".NL;
272}
273
274/**
275 * Strip comments and whitespaces from given JavaScript Code
276 *
277 * This is a port of Nick Galbreath's python tool jsstrip.py which is
278 * released under BSD license. See link for original code.
279 *
280 * @author Nick Galbreath <nickg@modp.com>
281 * @author Andreas Gohr <andi@splitbrain.org>
282 * @link   http://code.google.com/p/jsstrip/
283 */
284function js_compress($s){
285    $s = ltrim($s);     // strip all initial whitespace
286    $s .= "\n";
287    $i = 0;             // char index for input string
288    $j = 0;             // char forward index for input string
289    $line = 0;          // line number of file (close to it anyways)
290    $slen = strlen($s); // size of input string
291    $lch  = '';         // last char added
292    $result = '';       // we store the final result here
293
294    // items that don't need spaces next to them
295    $chars = "^&|!+\-*\/%=\?:;,{}()<>% \t\n\r'\"[]";
296
297    $regex_starters = array("(", "=", "[", "," , ":", "!");
298
299    $whitespaces_chars = array(" ", "\t", "\n", "\r", "\0", "\x0B");
300
301    while($i < $slen){
302        // skip all "boring" characters.  This is either
303        // reserved word (e.g. "for", "else", "if") or a
304        // variable/object/method (e.g. "foo.color")
305        while ($i < $slen && (strpos($chars,$s[$i]) === false) ){
306            $result .= $s{$i};
307            $i = $i + 1;
308        }
309
310        $ch = $s{$i};
311        // multiline comments (keeping IE conditionals)
312        if($ch == '/' && $s{$i+1} == '*' && $s{$i+2} != '@'){
313            $endC = strpos($s,'*/',$i+2);
314            if($endC === false) trigger_error('Found invalid /*..*/ comment', E_USER_ERROR);
315            $i = $endC + 2;
316            continue;
317        }
318
319        // singleline
320        if($ch == '/' && $s{$i+1} == '/'){
321            $endC = strpos($s,"\n",$i+2);
322            if($endC === false) trigger_error('Invalid comment', E_USER_ERROR);
323            $i = $endC;
324            continue;
325        }
326
327        // tricky.  might be an RE
328        if($ch == '/'){
329            // rewind, skip white space
330            $j = 1;
331            while(in_array($s{$i-$j}, $whitespaces_chars)){
332                $j = $j + 1;
333            }
334            if( in_array($s{$i-$j}, $regex_starters) ){
335                // yes, this is an re
336                // now move forward and find the end of it
337                $j = 1;
338                while($s{$i+$j} != '/'){
339                    while( ($s{$i+$j} != '\\') && ($s{$i+$j} != '/')){
340                        $j = $j + 1;
341                    }
342                    if($s{$i+$j} == '\\') $j = $j + 2;
343                }
344                $result .= substr($s,$i,$j+1);
345                $i = $i + $j + 1;
346                continue;
347            }
348        }
349
350        // double quote strings
351        if($ch == '"'){
352            $j = 1;
353            while( $s{$i+$j} != '"' && ($i+$j < $slen)){
354                if( $s{$i+$j} == '\\' && ($s{$i+$j+1} == '"' || $s{$i+$j+1} == '\\') ){
355                    $j += 2;
356                }else{
357                    $j += 1;
358                }
359            }
360            $result .= substr($s,$i,$j+1);
361            $i = $i + $j + 1;
362            continue;
363        }
364
365        // single quote strings
366        if($ch == "'"){
367            $j = 1;
368            while( $s{$i+$j} != "'" && ($i+$j < $slen)){
369                if( $s{$i+$j} == '\\' && ($s{$i+$j+1} == "'" || $s{$i+$j+1} == '\\') ){
370                    $j += 2;
371                }else{
372                    $j += 1;
373                }
374            }
375            $result .= substr($s,$i,$j+1);
376            $i = $i + $j + 1;
377            continue;
378        }
379
380        // whitespaces
381        if( $ch == ' ' || $ch == "\r" || $ch == "\n" || $ch == "\t" ){
382            // leading spaces
383            if($i+1 < $slen && (strpos($chars,$s[$i+1]) !== false)){
384                $i = $i + 1;
385                continue;
386            }
387            // trailing spaces
388            //  if this ch is space AND the last char processed
389            //  is special, then skip the space
390            $lch = substr($result,-1);
391            if($lch && (strpos($chars,$lch) !== false)){
392                $i = $i + 1;
393                continue;
394            }
395            // else after all of this convert the "whitespace" to
396            // a single space.  It will get appended below
397            $ch = ' ';
398        }
399
400        // other chars
401        $result .= $ch;
402        $i = $i + 1;
403    }
404
405    return trim($result);
406}
407
408//Setup VIM: ex: et ts=4 :
409