From d7c29c22572314680350ccdcf801f188aca541e4 Mon Sep 17 00:00:00 2001
From: Paul Nicholls <paul.nicholls@canterbury.ac.nz>
Date: Tue, 15 Jan 2013 13:08:25 +1300
Subject: [PATCH] MDL-32652 - Make block drag-drop work throughout Moodle

Other than shifting the initialisation from course/lib.php to
lib/outputrequirementslib.php, some workarounds/tweaks were required
in order to make it work correctly on admin pages and My Home.
---
 course/lib.php                | 10 ----------
 lib/ajax/blocks.php           | 14 ++++++++++++++
 lib/outputrequirementslib.php | 15 +++++++++++++++
 lib/yui/blocks/blocks.js      | 13 ++++++++++++-
 4 files changed, 41 insertions(+), 11 deletions(-)

diff --git a/course/lib.php b/course/lib.php
index 52302409346..c0f8945df35 100644
--- a/course/lib.php
+++ b/course/lib.php
@@ -4503,16 +4503,6 @@ function include_course_ajax($course, $usedmodules = array(), $enabledmodules =
             )), null, true);
     }
 
-    // Include blocks dragdrop
-    $params = array(
-        'courseid' => $course->id,
-        'pagetype' => $PAGE->pagetype,
-        'pagelayout' => $PAGE->pagelayout,
-        'subpage' => $PAGE->subpage,
-        'regions' => $PAGE->blocks->get_regions(),
-    );
-    $PAGE->requires->yui_module('moodle-core-blocks', 'M.core_blocks.init_dragdrop', array($params), null, true);
-
     // Require various strings for the command toolbox
     $PAGE->requires->strings_for_js(array(
             'moveleft',
diff --git a/lib/ajax/blocks.php b/lib/ajax/blocks.php
index 470106d071c..861540518e6 100644
--- a/lib/ajax/blocks.php
+++ b/lib/ajax/blocks.php
@@ -53,6 +53,20 @@ require_sesskey();
 // Setting layout to replicate blocks configuration for the page we edit
 $PAGE->set_pagelayout($pagelayout);
 $PAGE->set_subpage($subpage);
+$pagetype = explode('-', $pagetype);
+switch ($pagetype[0]) {
+    case 'admin':
+        // Admin pages need to be in the system context, not Site Course context.
+        $PAGE->set_context(context_system::instance());
+        break;
+    case 'my':
+        // My Home page needs to be in user context, and to have 'content' block region set up.
+        $PAGE->set_context(context_user::instance($USER->id));
+        $PAGE->set_blocks_editing_capability('moodle/my:manageblocks');
+        $PAGE->blocks->add_region('content');
+        break;
+}
+
 echo $OUTPUT->header(); // send headers
 
 switch ($action) {
diff --git a/lib/outputrequirementslib.php b/lib/outputrequirementslib.php
index d4eff1ccc2a..008d091ebd2 100644
--- a/lib/outputrequirementslib.php
+++ b/lib/outputrequirementslib.php
@@ -282,6 +282,21 @@ class page_requirements_manager {
         if ($page->pagelayout === 'frametop') {
             $this->js_init_call('M.util.init_frametop');
         }
+
+        // Include block drag/drop if editing is on
+        if ($page->user_is_editing()) {
+            $params = array(
+                'courseid' => $page->course->id,
+                'pagetype' => $page->pagetype,
+                'pagelayout' => $page->pagelayout,
+                'subpage' => $page->subpage,
+                'regions' => $page->blocks->get_regions(),
+            );
+            if (!empty($page->cm->id)) {
+                $params['cmid'] = $page->cm->id;
+            }
+            $page->requires->yui_module('moodle-core-blocks', 'M.core_blocks.init_dragdrop', array($params), null, true);
+        }
     }
 
     /**
diff --git a/lib/yui/blocks/blocks.js b/lib/yui/blocks/blocks.js
index edb655fa048..1c4ba8381a4 100644
--- a/lib/yui/blocks/blocks.js
+++ b/lib/yui/blocks/blocks.js
@@ -10,7 +10,9 @@ YUI.add('moodle-core-blocks', function(Y) {
         LIGHTBOX : 'lightbox',
         REGIONCONTENT : 'region-content',
         SKIPBLOCK : 'skip-block',
-        SKIPBLOCKTO : 'skip-block-to'
+        SKIPBLOCKTO : 'skip-block-to',
+        MYINDEX : 'page-my-index',
+        REGIONMAIN : 'region-main'
     }
 
     var DRAGBLOCK = function() {
@@ -26,6 +28,15 @@ YUI.add('moodle-core-blocks', function(Y) {
             this.samenodeclass = CSS.BLOCK;
             this.parentnodeclass = CSS.REGIONCONTENT;
 
+            // Add relevant classes and ID to 'content' block region on My Home page.
+            var myhomecontent = Y.Node.all('body#'+CSS.MYINDEX+' #'+CSS.REGIONMAIN+' > .'+CSS.REGIONCONTENT);
+            if (myhomecontent.size() > 0) {
+                var contentregion = myhomecontent.item(0);
+                contentregion.addClass(CSS.BLOCKREGION);
+                contentregion.set('id', CSS.REGIONCONTENT);
+                contentregion.one('div').addClass(CSS.REGIONCONTENT);
+            }
+
             // Initialise blocks dragging
             // Find all block regions on the page
             var blockregionlist = Y.Node.all('div.'+CSS.BLOCKREGION);