xref: /dokuwiki/lib/exe/js.php (revision f23f95941a400702f525923973f3612df6da82cb) 
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: application/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    $cache = new cache('scripts'.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'],'.js');
36    $cache->_event = 'JS_CACHE_USE';
37
38    // load minified version for some files
39    $min = $conf['compress'] ? '.min' : '';
40
41    // array of core files
42    $files = array(
43                DOKU_INC."lib/scripts/jquery/jquery$min.js",
44                DOKU_INC.'lib/scripts/jquery/jquery.cookie.js',
45                DOKU_INC."lib/scripts/jquery/jquery-ui$min.js",
46                DOKU_INC."lib/scripts/jquery/jquery-migrate$min.js",
47                DOKU_INC.'inc/lang/'.$conf['lang'].'/jquery.ui.datepicker.js',
48                DOKU_INC."lib/scripts/fileuploader.js",
49                DOKU_INC."lib/scripts/fileuploaderextended.js",
50                DOKU_INC.'lib/scripts/helpers.js',
51                DOKU_INC.'lib/scripts/delay.js',
52                DOKU_INC.'lib/scripts/cookie.js',
53                DOKU_INC.'lib/scripts/script.js',
54                DOKU_INC.'lib/scripts/tw-sack.js',
55                DOKU_INC.'lib/scripts/qsearch.js',
56                DOKU_INC.'lib/scripts/tree.js',
57                DOKU_INC.'lib/scripts/index.js',
58                DOKU_INC.'lib/scripts/drag.js',
59                DOKU_INC.'lib/scripts/textselection.js',
60                DOKU_INC.'lib/scripts/toolbar.js',
61                DOKU_INC.'lib/scripts/edit.js',
62                DOKU_INC.'lib/scripts/editor.js',
63                DOKU_INC.'lib/scripts/locktimer.js',
64                DOKU_INC.'lib/scripts/linkwiz.js',
65                DOKU_INC.'lib/scripts/media.js',
66# deprecated                DOKU_INC.'lib/scripts/compatibility.js',
67# disabled for FS#1958                DOKU_INC.'lib/scripts/hotkeys.js',
68                DOKU_INC.'lib/scripts/behaviour.js',
69                DOKU_INC.'lib/scripts/page.js',
70                tpl_incdir().'script.js',
71            );
72
73    // add possible plugin scripts and userscript
74    $files   = array_merge($files,js_pluginscripts());
75    if(!empty($config_cascade['userscript']['default'])) {
76        foreach($config_cascade['userscript']['default'] as $userscript) {
77            $files[] = $userscript;
78        }
79    }
80
81    $cache_files = array_merge($files, getConfigFiles('main'));
82    $cache_files[] = __FILE__;
83
84    // check cache age & handle conditional request
85    // This may exit if a cache can be used
86    $cache_ok = $cache->useCache(array('files' => $cache_files));
87    http_cached($cache->cache, $cache_ok);
88
89    // start output buffering and build the script
90    ob_start();
91
92    $json = new JSON();
93    // add some global variables
94    print "var DOKU_BASE   = '".DOKU_BASE."';";
95    print "var DOKU_TPL    = '".tpl_basedir()."';";
96    print "var DOKU_COOKIE_PARAM = " . $json->encode(
97            array(
98                 'path' => empty($conf['cookiedir']) ? DOKU_REL : $conf['cookiedir'],
99                 'secure' => $conf['securecookie'] && is_ssl()
100            )).";";
101    // FIXME: Move those to JSINFO
102    print "var DOKU_UHN    = ".((int) useHeading('navigation')).";";
103    print "var DOKU_UHC    = ".((int) useHeading('content')).";";
104
105    // load JS specific translations
106    $lang['js']['plugins'] = js_pluginstrings();
107    $templatestrings = js_templatestrings();
108    if(!empty($templatestrings)) {
109        $lang['js']['template'] = $templatestrings;
110    }
111    echo 'LANG = '.$json->encode($lang['js']).";\n";
112
113    // load toolbar
114    toolbar_JSdefines('toolbar');
115
116    // load files
117    foreach($files as $file){
118        if(!file_exists($file)) continue;
119        $ismin = (substr($file,-7) == '.min.js');
120        $debugjs = ($conf['allowdebug'] && strpos($file, DOKU_INC.'lib/scripts/') !== 0);
121
122        echo "\n\n/* XXXXXXXXXX begin of ".str_replace(DOKU_INC, '', $file) ." XXXXXXXXXX */\n\n";
123        if($ismin) echo "\n/* BEGIN NOCOMPRESS */\n";
124        if ($debugjs) echo "\ntry {\n";
125        js_load($file);
126        if ($debugjs) echo "\n} catch (e) {\n   logError(e, '".str_replace(DOKU_INC, '', $file)."');\n}\n";
127        if($ismin) echo "\n/* END NOCOMPRESS */\n";
128        echo "\n\n/* XXXXXXXXXX end of " . str_replace(DOKU_INC, '', $file) . " XXXXXXXXXX */\n\n";
129    }
130
131    // init stuff
132    if($conf['locktime'] != 0){
133        js_runonstart("dw_locktimer.init(".($conf['locktime'] - 60).",".$conf['usedraft'].")");
134    }
135    // init hotkeys - must have been done after init of toolbar
136# disabled for FS#1958    js_runonstart('initializeHotkeys()');
137
138    // end output buffering and get contents
139    $js = ob_get_contents();
140    ob_end_clean();
141
142    // strip any source maps
143    stripsourcemaps($js);
144
145    // compress whitespace and comments
146    if($conf['compress']){
147        $js = js_compress($js);
148    }
149
150    $js .= "\n"; // https://bugzilla.mozilla.org/show_bug.cgi?id=316033
151
152    http_cached_finish($cache->cache, $js);
153}
154
155/**
156 * Load the given file, handle include calls and print it
157 *
158 * @author Andreas Gohr <andi@splitbrain.org>
159 *
160 * @param string $file filename path to file
161 */
162function js_load($file){
163    if(!file_exists($file)) return;
164    static $loaded = array();
165
166    $data = io_readFile($file);
167    while(preg_match('#/\*\s*DOKUWIKI:include(_once)?\s+([\w\.\-_/]+)\s*\*/#',$data,$match)){
168        $ifile = $match[2];
169
170        // is it a include_once?
171        if($match[1]){
172            $base = utf8_basename($ifile);
173            if($loaded[$base]){
174                $data  = str_replace($match[0], '' ,$data);
175                continue;
176            }
177            $loaded[$base] = true;
178        }
179
180        if($ifile{0} != '/') $ifile = dirname($file).'/'.$ifile;
181
182        if(file_exists($ifile)){
183            $idata = io_readFile($ifile);
184        }else{
185            $idata = '';
186        }
187        $data  = str_replace($match[0],$idata,$data);
188    }
189    echo "$data\n";
190}
191
192/**
193 * Returns a list of possible Plugin Scripts (no existance check here)
194 *
195 * @author Andreas Gohr <andi@splitbrain.org>
196 *
197 * @return array
198 */
199function js_pluginscripts(){
200    $list = array();
201    $plugins = plugin_list();
202    foreach ($plugins as $p){
203        $list[] = DOKU_PLUGIN."$p/script.js";
204    }
205    return $list;
206}
207
208/**
209 * Return an two-dimensional array with strings from the language file of each plugin.
210 *
211 * - $lang['js'] must be an array.
212 * - Nothing is returned for plugins without an entry for $lang['js']
213 *
214 * @author Gabriel Birke <birke@d-scribe.de>
215 *
216 * @return array
217 */
218function js_pluginstrings() {
219    global $conf;
220    $pluginstrings = array();
221    $plugins = plugin_list();
222    foreach ($plugins as $p){
223        if (isset($lang)) unset($lang);
224        if (file_exists(DOKU_PLUGIN."$p/lang/en/lang.php")) {
225            include DOKU_PLUGIN."$p/lang/en/lang.php";
226        }
227        if (isset($conf['lang']) && $conf['lang']!='en' && file_exists(DOKU_PLUGIN."$p/lang/".$conf['lang']."/lang.php")) {
228            include DOKU_PLUGIN."$p/lang/".$conf['lang']."/lang.php";
229        }
230        if (isset($lang['js'])) {
231            $pluginstrings[$p] = $lang['js'];
232        }
233    }
234    return $pluginstrings;
235}
236
237/**
238 * Return an two-dimensional array with strings from the language file of current active template.
239 *
240 * - $lang['js'] must be an array.
241 * - Nothing is returned for template without an entry for $lang['js']
242 *
243 * @return array
244 */
245function js_templatestrings() {
246    global $conf;
247    $templatestrings = array();
248    if (file_exists(tpl_incdir()."lang/en/lang.php")) {
249        include tpl_incdir()."lang/en/lang.php";
250    }
251    if (isset($conf['lang']) && $conf['lang']!='en' && file_exists(tpl_incdir()."lang/".$conf['lang']."/lang.php")) {
252        include tpl_incdir()."lang/".$conf['lang']."/lang.php";
253    }
254    if (isset($lang['js'])) {
255        $templatestrings[$conf['template']] = $lang['js'];
256    }
257    return $templatestrings;
258}
259
260/**
261 * Escapes a String to be embedded in a JavaScript call, keeps \n
262 * as newline
263 *
264 * @author Andreas Gohr <andi@splitbrain.org>
265 *
266 * @param string $string
267 * @return string
268 */
269function js_escape($string){
270    return str_replace('\\\\n','\\n',addslashes($string));
271}
272
273/**
274 * Adds the given JavaScript code to the window.onload() event
275 *
276 * @author Andreas Gohr <andi@splitbrain.org>
277 *
278 * @param string $func
279 */
280function js_runonstart($func){
281    echo "jQuery(function(){ $func; });".NL;
282}
283
284/**
285 * Strip comments and whitespaces from given JavaScript Code
286 *
287 * This is a port of Nick Galbreath's python tool jsstrip.py which is
288 * released under BSD license. See link for original code.
289 *
290 * @author Nick Galbreath <nickg@modp.com>
291 * @author Andreas Gohr <andi@splitbrain.org>
292 * @link   http://code.google.com/p/jsstrip/
293 *
294 * @param string $s
295 * @return string
296 */
297function js_compress($s){
298    $s = ltrim($s);     // strip all initial whitespace
299    $s .= "\n";
300    $i = 0;             // char index for input string
301    $j = 0;             // char forward index for input string
302    $line = 0;          // line number of file (close to it anyways)
303    $slen = strlen($s); // size of input string
304    $lch  = '';         // last char added
305    $result = '';       // we store the final result here
306
307    // items that don't need spaces next to them
308    $chars = "^&|!+\-*\/%=\?:;,{}()<>% \t\n\r'\"[]";
309
310    // items which need a space if the sign before and after whitespace is equal.
311    // E.g. '+ ++' may not be compressed to '+++' --> syntax error.
312    $ops = "+-";
313
314    $regex_starters = array("(", "=", "[", "," , ":", "!", "&", "|");
315
316    $whitespaces_chars = array(" ", "\t", "\n", "\r", "\0", "\x0B");
317
318    while($i < $slen){
319        // skip all "boring" characters.  This is either
320        // reserved word (e.g. "for", "else", "if") or a
321        // variable/object/method (e.g. "foo.color")
322        while ($i < $slen && (strpos($chars,$s[$i]) === false) ){
323            $result .= $s{$i};
324            $i = $i + 1;
325        }
326
327        $ch = $s{$i};
328        // multiline comments (keeping IE conditionals)
329        if($ch == '/' && $s{$i+1} == '*' && $s{$i+2} != '@'){
330            $endC = strpos($s,'*/',$i+2);
331            if($endC === false) trigger_error('Found invalid /*..*/ comment', E_USER_ERROR);
332
333            // check if this is a NOCOMPRESS comment
334            if(substr($s, $i, $endC+2-$i) == '/* BEGIN NOCOMPRESS */'){
335                $endNC = strpos($s, '/* END NOCOMPRESS */', $endC+2);
336                if($endNC === false) trigger_error('Found invalid NOCOMPRESS comment', E_USER_ERROR);
337
338                // verbatim copy contents, trimming but putting it on its own line
339                $result .= "\n".trim(substr($s, $i + 22, $endNC - ($i + 22)))."\n"; // BEGIN comment = 22 chars
340                $i = $endNC + 20; // END comment = 20 chars
341            }else{
342                $i = $endC + 2;
343            }
344            continue;
345        }
346
347        // singleline
348        if($ch == '/' && $s{$i+1} == '/'){
349            $endC = strpos($s,"\n",$i+2);
350            if($endC === false) trigger_error('Invalid comment', E_USER_ERROR);
351            $i = $endC;
352            continue;
353        }
354
355        // tricky.  might be an RE
356        if($ch == '/'){
357            // rewind, skip white space
358            $j = 1;
359            while(in_array($s{$i-$j}, $whitespaces_chars)){
360                $j = $j + 1;
361            }
362            if( in_array($s{$i-$j}, $regex_starters) ){
363                // yes, this is an re
364                // now move forward and find the end of it
365                $j = 1;
366                while($s{$i+$j} != '/'){
367                    if($s{$i+$j} == '\\') $j = $j + 2;
368                    else $j++;
369                }
370                $result .= substr($s,$i,$j+1);
371                $i = $i + $j + 1;
372                continue;
373            }
374        }
375
376        // double quote strings
377        if($ch == '"'){
378            $j = 1;
379            while( $s{$i+$j} != '"' && ($i+$j < $slen)){
380                if( $s{$i+$j} == '\\' && ($s{$i+$j+1} == '"' || $s{$i+$j+1} == '\\') ){
381                    $j += 2;
382                }else{
383                    $j += 1;
384                }
385            }
386            $string  = substr($s,$i,$j+1);
387            // remove multiline markers:
388            $string  = str_replace("\\\n",'',$string);
389            $result .= $string;
390            $i = $i + $j + 1;
391            continue;
392        }
393
394        // single quote strings
395        if($ch == "'"){
396            $j = 1;
397            while( $s{$i+$j} != "'" && ($i+$j < $slen)){
398                if( $s{$i+$j} == '\\' && ($s{$i+$j+1} == "'" || $s{$i+$j+1} == '\\') ){
399                    $j += 2;
400                }else{
401                    $j += 1;
402                }
403            }
404            $string = substr($s,$i,$j+1);
405            // remove multiline markers:
406            $string  = str_replace("\\\n",'',$string);
407            $result .= $string;
408            $i = $i + $j + 1;
409            continue;
410        }
411
412        // whitespaces
413        if( $ch == ' ' || $ch == "\r" || $ch == "\n" || $ch == "\t" ){
414            $lch = substr($result,-1);
415
416            // Only consider deleting whitespace if the signs before and after
417            // are not equal and are not an operator which may not follow itself.
418            if ((!$lch || $s[$i+1] == ' ')
419                || $lch != $s[$i+1]
420                || strpos($ops,$s[$i+1]) === false) {
421                // leading spaces
422                if($i+1 < $slen && (strpos($chars,$s[$i+1]) !== false)){
423                    $i = $i + 1;
424                    continue;
425                }
426                // trailing spaces
427                //  if this ch is space AND the last char processed
428                //  is special, then skip the space
429                if($lch && (strpos($chars,$lch) !== false)){
430                    $i = $i + 1;
431                    continue;
432                }
433            }
434
435            // else after all of this convert the "whitespace" to
436            // a single space.  It will get appended below
437            $ch = ' ';
438        }
439
440        // other chars
441        $result .= $ch;
442        $i = $i + 1;
443    }
444
445    return trim($result);
446}
447
448//Setup VIM: ex: et ts=4 :
449