MDL-34740 add class file option to $CFG->moodlepageclass and $CFG->blockmanagerclass

config-dist.php

@@ -211,10 +211,12 @@ $CFG->admin = 'admin';
 // You can specify a different class to be created for the $PAGE global, and to
 // compute which blocks appear on each page. However, I cannot think of any good
 // reason why you would need to change that. It just felt wrong to hard-code the
-// the class name. You are stronly advised not to use these to settings unless
+// the class name. You are strongly advised not to use these to settings unless
 // you are absolutely sure you know what you are doing.
 //      $CFG->moodlepageclass = 'moodle_page';
+//      $CFG->moodlepageclassfile = "$CFG->dirroot/local/myplugin/mypageclass.php";
 //      $CFG->blockmanagerclass = 'block_manager';
+//      $CFG->blockmanagerclassfile = "$CFG->dirroot/local/myplugin/myblockamanagerclass.php";
 //
 // Seconds for files to remain in caches. Decrease this if you are worried
 // about students being served outdated versions of uploaded files.

lib/pagelib.php

@@ -578,6 +578,9 @@ class moodle_page {
         global $CFG;
         if (is_null($this->_blocks)) {
             if (!empty($CFG->blockmanagerclass)) {
+                if (!empty($CFG->blockmanagerclassfile)) {
+                    require_once($CFG->blockmanagerclassfile);
+                }
                 $classname = $CFG->blockmanagerclass;
             } else {
                 $classname = 'block_manager';

lib/setup.php

@@ -791,6 +791,9 @@ moodle_setlocale();
 
 // Create the $PAGE global - this marks the PAGE and OUTPUT fully initialised, this MUST be done at the end of setup!
 if (!empty($CFG->moodlepageclass)) {
+    if (!empty($CFG->moodlepageclassfile)) {
+        require_once($CFG->moodlepageclassfile);
+    }
     $classname = $CFG->moodlepageclass;
 } else {
     $classname = 'moodle_page';