xref: /dokuwiki/lib/exe/js.php (revision a4fb25f78eda9f7ef1442a800ed0956a9a4e4101) 
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    global $INPUT;
34
35    // decide from where to get the template
36    $tpl = trim(preg_replace('/[^\w-]+/','',$INPUT->str('t')));
37    if(!$tpl) $tpl = $conf['template'];
38
39    // The generated script depends on some dynamic options
40    $cache = new cache('scripts'.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'].DOKU_BASE.$tpl,'.js');
41    $cache->_event = 'JS_CACHE_USE';
42
43    // load minified version for some files
44    $min = $conf['compress'] ? '.min' : '';
45
46    // array of core files
47    $files = array(
48                DOKU_INC."lib/scripts/jquery/jquery$min.js",
49                DOKU_INC.'lib/scripts/jquery/jquery.cookie.js',
50                DOKU_INC."lib/scripts/jquery/jquery-ui$min.js",
51                DOKU_INC."lib/scripts/jquery/jquery-migrate$min.js",
52                DOKU_INC.'inc/lang/'.$conf['lang'].'/jquery.ui.datepicker.js',
53                DOKU_INC."lib/scripts/fileuploader.js",
54                DOKU_INC."lib/scripts/fileuploaderextended.js",
55                DOKU_INC.'lib/scripts/helpers.js',
56                DOKU_INC.'lib/scripts/delay.js',
57                DOKU_INC.'lib/scripts/cookie.js',
58                DOKU_INC.'lib/scripts/script.js',
59                DOKU_INC.'lib/scripts/tw-sack.js',
60                DOKU_INC.'lib/scripts/qsearch.js',
61                DOKU_INC.'lib/scripts/tree.js',
62                DOKU_INC.'lib/scripts/index.js',
63                DOKU_INC.'lib/scripts/drag.js',
64                DOKU_INC.'lib/scripts/textselection.js',
65                DOKU_INC.'lib/scripts/toolbar.js',
66                DOKU_INC.'lib/scripts/edit.js',
67                DOKU_INC.'lib/scripts/editor.js',
68                DOKU_INC.'lib/scripts/locktimer.js',
69                DOKU_INC.'lib/scripts/linkwiz.js',
70                DOKU_INC.'lib/scripts/media.js',
71# deprecated                DOKU_INC.'lib/scripts/compatibility.js',
72# disabled for FS#1958                DOKU_INC.'lib/scripts/hotkeys.js',
73                DOKU_INC.'lib/scripts/behaviour.js',
74                DOKU_INC.'lib/scripts/page.js',
75                tpl_incdir($tpl).'script.js',
76            );
77
78    // add possible plugin scripts and userscript
79    $files   = array_merge($files,js_pluginscripts());
80    if(!empty($config_cascade['userscript']['default'])) {
81        foreach($config_cascade['userscript']['default'] as $userscript) {
82            $files[] = $userscript;
83        }
84    }
85
86    $cache_files = array_merge($files, getConfigFiles('main'));
87    $cache_files[] = __FILE__;
88
89    // check cache age & handle conditional request
90    // This may exit if a cache can be used
91    $cache_ok = $cache->useCache(array('files' => $cache_files));
92    http_cached($cache->cache, $cache_ok);
93
94    // start output buffering and build the script
95    ob_start();
96
97    $json = new JSON();
98    // add some global variables
99    print "var DOKU_BASE   = '".DOKU_BASE."';";
100    print "var DOKU_TPL    = '".tpl_basedir($tpl)."';";
101    print "var DOKU_COOKIE_PARAM = " . $json->encode(
102            array(
103                 'path' => empty($conf['cookiedir']) ? DOKU_REL : $conf['cookiedir'],
104                 'secure' => $conf['securecookie'] && is_ssl()
105            )).";";
106    // FIXME: Move those to JSINFO
107    print "var DOKU_UHN    = ".((int) useHeading('navigation')).";";
108    print "var DOKU_UHC    = ".((int) useHeading('content')).";";
109
110    // load JS specific translations
111    $lang['js']['plugins'] = js_pluginstrings();
112    $templatestrings = js_templatestrings($tpl);
113    if(!empty($templatestrings)) {
114        $lang['js']['template'] = $templatestrings;
115    }
116    echo 'LANG = '.$json->encode($lang['js']).";\n";
117
118    // load toolbar
119    toolbar_JSdefines('toolbar');
120
121    // load files
122    foreach($files as $file){
123        if(!file_exists($file)) continue;
124        $ismin = (substr($file,-7) == '.min.js');
125        $debugjs = ($conf['allowdebug'] && strpos($file, DOKU_INC.'lib/scripts/') !== 0);
126
127        echo "\n\n/* XXXXXXXXXX begin of ".str_replace(DOKU_INC, '', $file) ." XXXXXXXXXX */\n\n";
128        if($ismin) echo "\n/* BEGIN NOCOMPRESS */\n";
129        if ($debugjs) echo "\ntry {\n";
130        js_load($file);
131        if ($debugjs) echo "\n} catch (e) {\n   logError(e, '".str_replace(DOKU_INC, '', $file)."');\n}\n";
132        if($ismin) echo "\n/* END NOCOMPRESS */\n";
133        echo "\n\n/* XXXXXXXXXX end of " . str_replace(DOKU_INC, '', $file) . " XXXXXXXXXX */\n\n";
134    }
135
136    // init stuff
137    if($conf['locktime'] != 0){
138        js_runonstart("dw_locktimer.init(".($conf['locktime'] - 60).",".$conf['usedraft'].")");
139    }
140    // init hotkeys - must have been done after init of toolbar
141# disabled for FS#1958    js_runonstart('initializeHotkeys()');
142
143    // end output buffering and get contents
144    $js = ob_get_contents();
145    ob_end_clean();
146
147    // strip any source maps
148    stripsourcemaps($js);
149
150    // compress whitespace and comments
151    if($conf['compress']){
152        $js = js_compress($js);
153    }
154
155    $js .= "\n"; // https://bugzilla.mozilla.org/show_bug.cgi?id=316033
156
157    http_cached_finish($cache->cache, $js);
158}
159
160/**
161 * Load the given file, handle include calls and print it
162 *
163 * @author Andreas Gohr <andi@splitbrain.org>
164 *
165 * @param string $file filename path to file
166 */
167function js_load($file){
168    if(!file_exists($file)) return;
169    static $loaded = array();
170
171    $data = io_readFile($file);
172    while(preg_match('#/\*\s*DOKUWIKI:include(_once)?\s+([\w\.\-_/]+)\s*\*/#',$data,$match)){
173        $ifile = $match[2];
174
175        // is it a include_once?
176        if($match[1]){
177            $base = utf8_basename($ifile);
178            if($loaded[$base]){
179                $data  = str_replace($match[0], '' ,$data);
180                continue;
181            }
182            $loaded[$base] = true;
183        }
184
185        if($ifile{0} != '/') $ifile = dirname($file).'/'.$ifile;
186
187        if(file_exists($ifile)){
188            $idata = io_readFile($ifile);
189        }else{
190            $idata = '';
191        }
192        $data  = str_replace($match[0],$idata,$data);
193    }
194    echo "$data\n";
195}
196
197/**
198 * Returns a list of possible Plugin Scripts (no existance check here)
199 *
200 * @author Andreas Gohr <andi@splitbrain.org>
201 *
202 * @return array
203 */
204function js_pluginscripts(){
205    $list = array();
206    $plugins = plugin_list();
207    foreach ($plugins as $p){
208        $list[] = DOKU_PLUGIN."$p/script.js";
209    }
210    return $list;
211}
212
213/**
214 * Return an two-dimensional array with strings from the language file of each plugin.
215 *
216 * - $lang['js'] must be an array.
217 * - Nothing is returned for plugins without an entry for $lang['js']
218 *
219 * @author Gabriel Birke <birke@d-scribe.de>
220 *
221 * @return array
222 */
223function js_pluginstrings() {
224    global $conf;
225    $pluginstrings = array();
226    $plugins = plugin_list();
227    foreach ($plugins as $p){
228        if (isset($lang)) unset($lang);
229        if (file_exists(DOKU_PLUGIN."$p/lang/en/lang.php")) {
230            include DOKU_PLUGIN."$p/lang/en/lang.php";
231        }
232        if (isset($conf['lang']) && $conf['lang']!='en' && file_exists(DOKU_PLUGIN."$p/lang/".$conf['lang']."/lang.php")) {
233            include DOKU_PLUGIN."$p/lang/".$conf['lang']."/lang.php";
234        }
235        if (isset($lang['js'])) {
236            $pluginstrings[$p] = $lang['js'];
237        }
238    }
239    return $pluginstrings;
240}
241
242/**
243 * Return an two-dimensional array with strings from the language file of current active template.
244 *
245 * - $lang['js'] must be an array.
246 * - Nothing is returned for template without an entry for $lang['js']
247 *
248 * @param string $tpl
249 * @return array
250 */
251function js_templatestrings($tpl) {
252    global $conf;
253    $templatestrings = array();
254    if (file_exists(tpl_incdir($tpl)."lang/en/lang.php")) {
255        include tpl_incdir($tpl)."lang/en/lang.php";
256    }
257    if (isset($conf['lang']) && $conf['lang']!='en' && file_exists(tpl_incdir($tpl)."lang/".$conf['lang']."/lang.php")) {
258        include tpl_incdir($tpl)."lang/".$conf['lang']."/lang.php";
259    }
260    if (isset($lang['js'])) {
261        $templatestrings[$tpl] = $lang['js'];
262    }
263    return $templatestrings;
264}
265
266/**
267 * Escapes a String to be embedded in a JavaScript call, keeps \n
268 * as newline
269 *
270 * @author Andreas Gohr <andi@splitbrain.org>
271 *
272 * @param string $string
273 * @return string
274 */
275function js_escape($string){
276    return str_replace('\\\\n','\\n',addslashes($string));
277}
278
279/**
280 * Adds the given JavaScript code to the window.onload() event
281 *
282 * @author Andreas Gohr <andi@splitbrain.org>
283 *
284 * @param string $func
285 */
286function js_runonstart($func){
287    echo "jQuery(function(){ $func; });".NL;
288}
289
290/**
291 * Strip comments and whitespaces from given JavaScript Code
292 *
293 * This is a port of Nick Galbreath's python tool jsstrip.py which is
294 * released under BSD license. See link for original code.
295 *
296 * @author Nick Galbreath <nickg@modp.com>
297 * @author Andreas Gohr <andi@splitbrain.org>
298 * @link   http://code.google.com/p/jsstrip/
299 *
300 * @param string $s
301 * @return string
302 */
303function js_compress($s){
304    $s = ltrim($s);     // strip all initial whitespace
305    $s .= "\n";
306    $i = 0;             // char index for input string
307    $j = 0;             // char forward index for input string
308    $line = 0;          // line number of file (close to it anyways)
309    $slen = strlen($s); // size of input string
310    $lch  = '';         // last char added
311    $result = '';       // we store the final result here
312
313    // items that don't need spaces next to them
314    $chars = "^&|!+\-*\/%=\?:;,{}()<>% \t\n\r'\"[]";
315
316    // items which need a space if the sign before and after whitespace is equal.
317    // E.g. '+ ++' may not be compressed to '+++' --> syntax error.
318    $ops = "+-";
319
320    $regex_starters = array("(", "=", "[", "," , ":", "!", "&", "|");
321
322    $whitespaces_chars = array(" ", "\t", "\n", "\r", "\0", "\x0B");
323
324    while($i < $slen){
325        // skip all "boring" characters.  This is either
326        // reserved word (e.g. "for", "else", "if") or a
327        // variable/object/method (e.g. "foo.color")
328        while ($i < $slen && (strpos($chars,$s[$i]) === false) ){
329            $result .= $s{$i};
330            $i = $i + 1;
331        }
332
333        $ch = $s{$i};
334        // multiline comments (keeping IE conditionals)
335        if($ch == '/' && $s{$i+1} == '*' && $s{$i+2} != '@'){
336            $endC = strpos($s,'*/',$i+2);
337            if($endC === false) trigger_error('Found invalid /*..*/ comment', E_USER_ERROR);
338
339            // check if this is a NOCOMPRESS comment
340            if(substr($s, $i, $endC+2-$i) == '/* BEGIN NOCOMPRESS */'){
341                $endNC = strpos($s, '/* END NOCOMPRESS */', $endC+2);
342                if($endNC === false) trigger_error('Found invalid NOCOMPRESS comment', E_USER_ERROR);
343
344                // verbatim copy contents, trimming but putting it on its own line
345                $result .= "\n".trim(substr($s, $i + 22, $endNC - ($i + 22)))."\n"; // BEGIN comment = 22 chars
346                $i = $endNC + 20; // END comment = 20 chars
347            }else{
348                $i = $endC + 2;
349            }
350            continue;
351        }
352
353        // singleline
354        if($ch == '/' && $s{$i+1} == '/'){
355            $endC = strpos($s,"\n",$i+2);
356            if($endC === false) trigger_error('Invalid comment', E_USER_ERROR);
357            $i = $endC;
358            continue;
359        }
360
361        // tricky.  might be an RE
362        if($ch == '/'){
363            // rewind, skip white space
364            $j = 1;
365            while(in_array($s{$i-$j}, $whitespaces_chars)){
366                $j = $j + 1;
367            }
368            if( in_array($s{$i-$j}, $regex_starters) ){
369                // yes, this is an re
370                // now move forward and find the end of it
371                $j = 1;
372                while($s{$i+$j} != '/'){
373                    if($s{$i+$j} == '\\') $j = $j + 2;
374                    else $j++;
375                }
376                $result .= substr($s,$i,$j+1);
377                $i = $i + $j + 1;
378                continue;
379            }
380        }
381
382        // double quote strings
383        if($ch == '"'){
384            $j = 1;
385            while( $s{$i+$j} != '"' && ($i+$j < $slen)){
386                if( $s{$i+$j} == '\\' && ($s{$i+$j+1} == '"' || $s{$i+$j+1} == '\\') ){
387                    $j += 2;
388                }else{
389                    $j += 1;
390                }
391            }
392            $string  = substr($s,$i,$j+1);
393            // remove multiline markers:
394            $string  = str_replace("\\\n",'',$string);
395            $result .= $string;
396            $i = $i + $j + 1;
397            continue;
398        }
399
400        // single quote strings
401        if($ch == "'"){
402            $j = 1;
403            while( $s{$i+$j} != "'" && ($i+$j < $slen)){
404                if( $s{$i+$j} == '\\' && ($s{$i+$j+1} == "'" || $s{$i+$j+1} == '\\') ){
405                    $j += 2;
406                }else{
407                    $j += 1;
408                }
409            }
410            $string = substr($s,$i,$j+1);
411            // remove multiline markers:
412            $string  = str_replace("\\\n",'',$string);
413            $result .= $string;
414            $i = $i + $j + 1;
415            continue;
416        }
417
418        // whitespaces
419        if( $ch == ' ' || $ch == "\r" || $ch == "\n" || $ch == "\t" ){
420            $lch = substr($result,-1);
421
422            // Only consider deleting whitespace if the signs before and after
423            // are not equal and are not an operator which may not follow itself.
424            if ((!$lch || $s[$i+1] == ' ')
425                || $lch != $s[$i+1]
426                || strpos($ops,$s[$i+1]) === false) {
427                // leading spaces
428                if($i+1 < $slen && (strpos($chars,$s[$i+1]) !== false)){
429                    $i = $i + 1;
430                    continue;
431                }
432                // trailing spaces
433                //  if this ch is space AND the last char processed
434                //  is special, then skip the space
435                if($lch && (strpos($chars,$lch) !== false)){
436                    $i = $i + 1;
437                    continue;
438                }
439            }
440
441            // else after all of this convert the "whitespace" to
442            // a single space.  It will get appended below
443            $ch = ' ';
444        }
445
446        // other chars
447        $result .= $ch;
448        $i = $i + 1;
449    }
450
451    return trim($result);
452}
453
454//Setup VIM: ex: et ts=4 :
455