diff --git a/mod/assign/feedback/editpdf/styles.css b/mod/assign/feedback/editpdf/styles.css
index 7e54731ce2a..89bee81a67c 100644
--- a/mod/assign/feedback/editpdf/styles.css
+++ b/mod/assign/feedback/editpdf/styles.css
@@ -398,6 +398,7 @@ ul.assignfeedback_editpdf_menu {
         position: relative;
         margin-bottom: 1em;
         top: 0;
+        max-height: 312px;
     }
 
     .assignfeedback_editpdf_widget .pageheader {
diff --git a/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-debug.js b/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-debug.js
index 1716dfe3b1e..abc2f1e43ca 100644
--- a/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-debug.js
+++ b/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-debug.js
@@ -3500,14 +3500,6 @@ EDITOR.prototype = {
      */
     collapsecomments: true,
 
-    /**
-     * Check if passive option is supported
-     * @property isPassiveSupported
-     * @type Boolean
-     * @public
-     */
-    isPassiveSupported : false,
-
     /**
      * Called during the initialisation process of the object.
      * @method initializer
@@ -4035,8 +4027,7 @@ EDITOR.prototype = {
         if (this.get('readonly')) {
             return;
         }
-        // Check if passive option is supported for event listener
-        this.check_passive_supported();
+        this.disable_touch_scroll();
 
         // Setup the tool buttons.
         Y.each(TOOLSELECTOR, function(selector, tool) {
@@ -4132,15 +4123,6 @@ EDITOR.prototype = {
             this.lastannotationtool = tool;
         }
 
-        var useragent = navigator.userAgent;
-        if (useragent.includes("Safari")) {
-            if (tool === "drag") {
-                this.enable_touch_scroll();
-            } else {
-                this.disable_touch_scroll();
-            }
-        }
-
         this.refresh_button_state();
     },
 
@@ -4688,51 +4670,49 @@ EDITOR.prototype = {
     },
 
     /**
-     * Check if Passive option is support
+     * Test the browser support for options objects on event listeners.
+     * @return Boolean
      */
-    check_passive_supported : function() {
+    event_listener_options_supported: function() {
+        var passivesupported = false,
+            options,
+            testeventname = "testpassiveeventoptions";
+
+        // Options support testing example from:
+        // https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
+
         try {
-            var options = Object.defineProperty && Object.defineProperty({}, 'passive', {
+            options = Object.defineProperty({}, "passive", {
                 get: function() {
-                    this.isPassiveSupported = true;
-                }.bind(this)
+                    passivesupported = true;
+                }
             });
 
-            document.addEventListener('touchmove', options, options);
-            document.removeEventListener('touchmove', options, options);
-
-        } catch (err) {
-            this.isPassiveSupported = false;
+            // We use an event name that is not likely to conflict with any real event.
+            document.addEventListener(testeventname, options, options);
+            // We remove the event listener as we have tested the options already.
+            document.removeEventListener(testeventname, options, options);
+        } catch(err) {
+            // It's already false.
+            passivesupported = false;
         }
+        return passivesupported;
     },
 
     /**
      * Disable Touch Move scrolling
      */
-    disable_touch_scroll : function() {
-        var drawingregion = this.get_dialogue_element(SELECTOR.DRAWINGREGION);
-        drawingregion.setStyle('overflow', 'hidden');
-        if (this.isPassiveSupported) {
+    disable_touch_scroll: function() {
+        if (this.event_listener_options_supported()) {
             document.addEventListener('touchmove', this.stop_touch_scroll, {passive: false});
         }
     },
 
-    /**
-     * Enable Touch Move scrolling
-     */
-    enable_touch_scroll : function() {
-        var drawingregion = this.get_dialogue_element(SELECTOR.DRAWINGREGION);
-        drawingregion.setStyle('overflow', 'auto');
-        if (this.isPassiveSupported) {
-            document.removeEventListener('touchmove', this.stop_touch_scroll, {passive: false});
-        }
-    },
-
     /**
      * Stop Touch Scrolling
      * @param {Object} e
      */
-    stop_touch_scroll : function(e) {
+    stop_touch_scroll: function(e) {
         e.stopPropagation();
         e.preventDefault();
     }
@@ -4803,6 +4783,7 @@ M.assignfeedback_editpdf.editor.init = M.assignfeedback_editpdf.editor.init || f
     return M.assignfeedback_editpdf.instance;
 };
 
+
 }, '@VERSION@', {
     "requires": [
         "base",
diff --git a/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-min.js b/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-min.js
index 96dab18a425..64e39bc5cc3 100644
--- a/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-min.js
+++ b/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor-min.js
@@ -3,7 +3,7 @@ YUI.add("moodle-assignfeedback_editpdf-editor",function(e,t){var n=M.cfg.wwwroot
 M.assignfeedback_editpdf.drawable(this.editor),r,i,s;return i=new M.assignfeedback_editpdf.rect,i.bound([new M.assignfeedback_editpdf.point(t.start.x,t.start.y),new M.assignfeedback_editpdf.point(t.end.x,t.end.y)]),i.has_min_width()||i.set_min_width(),s=l[t.annotationcolour],s=s.replace("rgb","rgba"),s=s.replace(")",",0.5)"),r=this.editor.graphic.addShape({type:e.Rect,width:i.width,height:16,stroke:!1,fill:{color:s},x:i.x,y:t.start.y}),n.shapes.push(r),n},init_from_edit:function(e){var t=new M.assignfeedback_editpdf.rect;return t.bound([e.start,e.end]),this.gradeid=this.editor.get("gradeid"),this.pageno=this.editor.currentpage,this.x=t.x,this.y=e.start.y,this.endx=t.x+t.width,this.endy=e.start.y+16,this.colour=e.annotationcolour,this.page="",t.has_min_width()}}),M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.annotationhighlight=x;var T=function(e){T.superclass.constructor.apply(this,[e])};T.NAME="annotationstamp",T.ATTRS={},e.extend(T,M.assignfeedback_editpdf.annotation,{draw:function(){var t=new M.assignfeedback_editpdf.drawable(this.editor),n=this.editor.get_dialogue_element(s.DRAWINGREGION),r,i;return i=this.editor.get_window_coordinates(new M.assignfeedback_editpdf.point(this.x,this.y)),r=e.Node.create("<div/>"),r.setStyles({position:"absolute",display:"inline-block",backgroundImage:"url("+this.editor.get_stamp_image_url(this.path)+")",width:this.endx-this.x,height:this.endy-this.y,backgroundSize:"100% 100%",zIndex:50}),n.append(r),r.setX(i.x),r.setY(i.y),t.store_position(r,i.x,i.y),this.editor.get("readonly")||(r.on("gesturemovestart",this.editor.edit_start,null,this.editor),r.on("gesturemove",this.editor.edit_move,null,this.editor),r.on("gesturemoveend",this.editor.edit_end,null,this.editor)),t.nodes.push(r),this.drawable=t,T.superclass.draw.apply(this)},draw_current_edit:function(t){var n=new M.assignfeedback_editpdf.rect,r=new M.assignfeedback_editpdf.drawable(this.editor),i=this.editor.get_dialogue_element(s.DRAWINGREGION),o,u;return n.bound([t.start,t.end]),u=this.editor.get_window_coordinates(new M.assignfeedback_editpdf.point(n.x,n.y)),o=e.Node.create("<div/>"),o.setStyles({position:"absolute",display:"inline-block",backgroundImage:"url("+this.editor.get_stamp_image_url(t.stamp)+")",width:n.width,height:n.height,backgroundSize:"100% 100%",zIndex:50}),i.append(o),o.setX(u.x),o.setY(u.y),r.store_position(o,u.x,u.y),r.nodes.push(o),r},init_from_edit:function(e){var t=new M.assignfeedback_editpdf.rect;return t.bound([e.start,e.end]),t.width<40&&(t.width=40),t.height<40&&(t.height=40),this.gradeid=this.editor.get("gradeid"),this.pageno=this.editor.currentpage,this.x=t.x,this.y=t.y,this.endx=t.x+t.width,this.endy=t.y+t.height,this.colour=e.annotationcolour,this.path=e.stamp,!0},move:function(e,t){var n=e-this.x,r=t-this.y;this.x+=n,this.y+=r,this.endx+=n,this.endy+=r,this.drawable&&this.drawable.erase(),this.editor.drawables.push(this.draw())}}),M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.annotationstamp=T;var N="Dropdown menu",C;C=function(e){e.draggable=!1,e.centered=!1,e.width="auto",e.visible=!1,e.footerContent="",C.superclass.constructor.apply(this,[e])},e.extend(C,M.core.dialogue,{initializer:function(t){var n,r,i,s;C.superclass.initializer.call(this,t),s=this.get("boundingBox"),s.addClass("assignfeedback_editpdf_dropdown"),n=this.get("buttonNode"),r=this.bodyNode,i=e.Node.create("<h3/>"),i.addClass("accesshide"),i.setHTML(this.get("headerText")),r.prepend(i),r.on("clickoutside",function(e){this.get("visible")&&e.target.get("id")!==n.get("id")&&e.target.ancestor().get("id")!==n.get("id")&&(e.preventDefault(),this.hide())},this),n.on("click",function(e){e.preventDefault(),this.show()},this),n.on("key",this.show,"enter,space",this)},show:function(){var t=this.get("buttonNode"),n=C.superclass.show.call(this);return this.align(t,[e.WidgetPositionAlign.TL,e.WidgetPositionAlign.BL]),n}},{NAME:N,ATTRS:{headerText:{value:""},buttonNode:{value:null}}}),e.Base.modifyAttrs(C,{modal:{getter:function(){return!1}}}),M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.dropdown=C;var k="Colourpicker",L;L=function(e){L.superclass.constructor.apply(this,[e])},e.extend(L,M.assignfeedback_editpdf.dropdown,{initializer:function(t){var n=e.Node.create('<ul role="menu" class="assignfeedback_editpdf_menu"/>'),r;e.each(this.get("colours"),function(t,r){var i,s,o,u,a;o=M.util.get_string(r,"assignfeedback_editpdf"),a=this.get("iconprefix")+r,u=M.util.image_url(a,"assignfeedback_editpdf"),i=e.Node.create('<button><img alt="'+o+'" src="'+u+'"/></button>'),i.setAttribute("data-colour",r),i.setAttribute("data-rgb",t),i.setStyle("backgroundImage","none"),s=e.Node.create("<li/>"),s.append(i),n.append(s)},this),r=e.Node.create("<div/>"),n.delegate("click",this.callback_handler,"button",this),n.delegate("key",this.callback_handler,"down:13","button",this),this.set("headerText",M.util.get_string("colourpicker","assignfeedback_editpdf")),r.append(n),this.set("bodyContent",r),L.superclass.initializer.call(this,t)},callback_handler:function(t){t.preventDefault();var n=this.get("callback"),r=this.get("context"),i;this.hide(),i=e.bind(n,r,t),i()}},{NAME:k,ATTRS:{colours:{value:{}},callback:{value:null},context:{value:null},iconprefix:{value:"colour_"}}}),M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.colourpicker=L;var A="Colourpicker",O;O=function(e){O.superclass.constructor.apply(this,[e])},e.extend(O,M.assignfeedback_editpdf.dropdown,{initializer:function(t){var n=e.Node.create('<ul role="menu" class="assignfeedback_editpdf_menu"/>');e.each(this.get("stamps"),function(t){var r,i,s;s=M.util.get_string("stamp","assignfeedback_editpdf"),r=e.Node.create('<button><img height="16" width="16" alt="'+s+'" src="'+t+'"/></button>'),r.setAttribute("data-stamp",t),r.setStyle("backgroundImage","none"),i=e.Node.create("<li/>"),i.append(r),n.append(i)},this),n.delegate("click",this.callback_handler,"button"
 ,this),n.delegate("key",this.callback_handler,"down:13","button",this),this.set("headerText",M.util.get_string("stamppicker","assignfeedback_editpdf")),this.set("bodyContent",n),O.superclass.initializer.call(this,t)},callback_handler:function(t){t.preventDefault();var n=this.get("callback"),r=this.get("context"),i;this.hide(),i=e.bind(n,r,t),i()}},{NAME:A,ATTRS:{stamps:{value:[]},callback:{value:null},context:{value:null}}}),M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.stamppicker=O;var _="Commentmenu",D;D=function(e){D.superclass.constructor.apply(this,[e])},e.extend(D,M.assignfeedback_editpdf.dropdown,{initializer:function(t){var n,r,i,s;s=this.get("comment"),n=e.Node.create('<ul role="menu" class="assignfeedback_editpdf_menu"/>'),r=e.Node.create('<li><a tabindex="-1" href="#">'+M.util.get_string("addtoquicklist","assignfeedback_editpdf")+"</a></li>"),r.on("click",s.add_to_quicklist,s),r.on("key",s.add_to_quicklist,"enter,space",s),n.append(r),r=e.Node.create('<li><a tabindex="-1" href="#">'+M.util.get_string("deletecomment","assignfeedback_editpdf")+"</a></li>"),r.on("click",function(e){e.preventDefault(),this.menu.hide(),this.remove()},s),r.on("key",function(){s.menu.hide(),s.remove()},"enter,space",s),n.append(r),r=e.Node.create("<li><hr/></li>"),n.append(r),this.set("headerText",M.util.get_string("commentcontextmenu","assignfeedback_editpdf")),i=e.Node.create("<div/>"),i.append(n),this.set("bodyContent",i),D.superclass.initializer.call(this,t)},show:function(){var t=this.get("boundingBox").one("ul");t.all(".quicklist_comment").remove(!0);var n=this.get("comment");n.deleteme=!1,e.each(n.editor.quicklist.comments,function(r){var i=e.Node.create('<li class="quicklist_comment"></li>'),s=e.Node.create('<a href="#" tabindex="-1">'+r.rawtext+"</a>"),o=e.Node.create('<a href="#" tabindex="-1" class="delete_quicklist_comment"><img src="'+M.util.image_url("t/delete","core")+'" '+'alt="'+M.util.get_string("deletecomment","assignfeedback_editpdf")+'"/>'+"</a>");i.append(s),i.append(o),t.append(i),i.on("click",n.set_from_quick_comment,n,r),i.on("key",n.set_from_quick_comment,"space,enter",n,r),o.on("click",n.remove_from_quicklist,n,r),o.on("key",n.remove_from_quicklist,"space,enter",n,r)},this),D.superclass.show.call(this)}},{NAME:_,ATTRS:{comment:{value:null}}}),M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.commentmenu=D;var P="commentsearch",H;H=function(e){e.draggable=!1,e.centered=!0,e.width="400px",e.visible=!1,e.headerContent=M.util.get_string("searchcomments","assignfeedback_editpdf"),e.footerContent="",H.superclass.constructor.apply(this,[e])},e.extend(H,M.core.dialogue,{initializer:function(t){var n,r,i,s,o,u;u=this.get("boundingBox"),u.addClass("assignfeedback_editpdf_commentsearch"),n=this.get("editor"),r=e.Node.create("<div/>"),i=M.util.get_string("filter","assignfeedback_editpdf"),s=e.Node.create('<input type="text" size="20" placeholder="'+i+'"/>'),r.append(s),o=e.Node.create('<ul role="menu" class="assignfeedback_editpdf_search"/>'),r.append(o),s.on("keyup",this.filter_search_comments,this),o.delegate("click",this.focus_on_comment,"a",this),o.delegate("key",this.focus_on_comment,"enter,space","a",this),this.set("bodyContent",r),H.superclass.initializer.call(this,t)},filter_search_comments:function(){var t,n,r,i;i=this.get("id"),t=e.one("#"+i+s.SEARCHFILTER),n=e.one("#"+i+s.SEARCHCOMMENTSLIST),r=t.get("value"),n.all("li").each(function(e){e.get("text").indexOf(r)!==-1?e.show():e.hide()})},focus_on_comment:function(e){e.preventDefault();var t=e.target.ancestor("li"),n=t.getData("comment"),r=this.get("editor");this.hide(),n.pageno=n.clean().pageno,n.pageno!==r.currentpage&&(r.currentpage=n.pageno,r.change_page()),n.node=n.drawable.nodes[0].one("textarea"),n.node.ancestor("div").removeClass("commentcollapsed"),n.node.focus()},show:function(){var t=this.get("boundingBox").one("ul"),n=this.get("editor");t.all("li").remove(!0),e.each(n.pages,function(n){e.each(n.comments,function(n){var r=e.Node.create('<li><a href="#" tabindex="-1"><pre>'+n.rawtext+"</pre></a></li>");t.append(r),r.setData("comment",n)},this)},this),this.centerDialogue(),H.superclass.show.call(this)}},{NAME:P,ATTRS:{editor:{value:null}}}),e.Base.modifyAttrs(H,{modal:{getter:function(){return!0}}}),M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.commentsearch=H;var B=function(t,n,r,i,o,u,l,c){this.editor=t,this.gradeid=n||0,this.x=parseInt(i,10)||0,this.y=parseInt(o,10)||0,this.width=parseInt(u,10)||0,this.rawtext=c||"",this.pageno=r||0,this.colour=l||"yellow",this.drawable=!1,this.deleteme=!1,this.menulink=null,this.menu=null,this.clean=function(){return{gradeid:this.gradeid,x:parseInt(this.x,10),y:parseInt(this.y,10),width:parseInt(this.width,10),rawtext:this.rawtext,pageno:parseInt(this.pageno,10),colour:this.colour}},this.draw=function(n){var r=new M.assignfeedback_editpdf.drawable(this.editor),i,o=this.editor.get_dialogue_element(s.DRAWINGREGION),u,l,c,h,p,d;return i=e.Node.create("<textarea/>"),u=e.Node.create('<div class="commentdrawable"/>'),l=e.Node.create("<label/>"),c=e.Node.create('<svg xmlns="http://www.w3.org/2000/svg" viewBox="-0.5 -0.5 13 13" preserveAspectRatio="xMinYMin meet"><path d="M11 0H1C.4 0 0 .4 0 1v6c0 .6.4 1 1 1h1v4l4-4h5c.6 0 1-.4 1-1V1c0-.6-.4-1-1-1z" fill="currentColor" opacity="0.9" stroke="rgb(153, 153, 153)" stroke-width="0.5"/></svg>'),h=e.Node.create('<a href="#"><img src="'+M.util.image_url("t/contextmenu","core")+'"/></a>'),this.menulink=h,u.append(l),l.append(i),u.append(c),u.setAttribute("tabindex","-1"),l.setAttribute("tabindex","0"),i.setAttribute("tabindex","-1"),h.setAttribute("tabindex","0"),this.editor.get("readonly")?i.setAttribute("readonly","readonly"):u.append(h),this.width<100&&(this.width=100),p=this.editor.get_window_coordinates(new M.assignfeedback_editpdf.point(this.x,this.y)),i.setStyles({width:this.width+"px",backgroundColor:f[this.colour],color:a}),o.append(u),u.setStyle
 ("position","absolute"),u.setX(p.x),u.setY(p.y),r.store_position(u,p.x,p.y),r.nodes.push(u),i.set("value",this.rawtext),d=i.get("scrollHeight"),i.setStyles({height:d+"px",overflow:"hidden"}),c.setStyle("color",f[this.colour]),this.attach_events(i,h),n?i.focus():t.collapsecomments&&u.addClass("commentcollapsed"),this.drawable=r,r},this.delete_comment_later=function(){this.deleteme&&this.remove()},this.attach_events=function(n,r){var i=n.ancestor("div"),s=n.ancestor("label"),o=s.next("svg");n.collapse=function(r){n.collapse.delay=e.later(r,n,function(){t.collapsecomments&&i.addClass("commentcollapsed")})},n.expand=function(){n.getData("dragging")!==!0&&(n.collapse.delay&&n.collapse.delay.cancel(),i.removeClass("commentcollapsed"))},i.on("mouseenter",function(){(t.currentedit.tool==="comment"||t.currentedit.tool==="select"||this.editor.get("readonly"))&&n.expand()},this),i.on("click|tap",function(){n.expand(),n.focus()},this),n.on("keyup",function(e){e.keyCode===9&&e.shiftKey&&r.getAttribute("tabindex")==="0"&&r.focus(),r.setAttribute("tabindex","0")},this),r.on("keydown",function(e){e.keyCode===9&&e.shiftKey&&r.setAttribute("tabindex","-1")},this),s.on("focus",function(){n.active=!0,n.collapse.delay&&n.collapse.delay.cancel(),n.setAttribute("tabindex","0"),n.expand(),n.focus(),s.setAttribute("tabindex","-1")},this),r.on("focus",function(){n.active=!0,n.collapse.delay&&n.collapse.delay.cancel(),this.deleteme=!1,s.setAttribute("tabindex","0")},this),n.on("blur",function(){n.setAttribute("tabindex","-1")},this),s.on("blur",function(){s.setAttribute("tabindex","0")},this),i.on("mouseleave",function(){t.collapsecomments&&n.active!==!0&&n.collapse(400)},this),i.on("blur",function(){n.active=!1,n.collapse(800)},this),this.editor.get("readonly")||(n.on("blur",function(){this.rawtext=n.get("value"),this.width=parseInt(n.getStyle("width"),10),this.rawtext.replace(/^\s+|\s+$/g,"")===""&&(this.deleteme=!0,e.later(400,this,this.delete_comment_later)),this.editor.save_current_page(),this.editor.editingcomment=!1},this),r.setData("comment",this),n.on("keyup",function(){n.setStyle("height","auto");var e=n.get("scrollHeight"),t=parseInt(n.getStyle("height"),10);e===t+8&&(e-=8),n.setStyle("height",e+"px")}),n.on("gesturemovestart",function(e){t.currentedit.tool==="select"&&(e.preventDefault(),t.collapsecomments?(n.setData("offsetx",8),n.setData("offsety",8)):(n.setData("offsetx",e.clientX-i.getX()),n.setData("offsety",e.clientY-i.getY())))}),n.on("gesturemove",function(e){if(t.currentedit.tool==="select"){var r=e.clientX-n.getData("offsetx"),s=e.clientY-n.getData("offsety"),o,u,a;n.getData("dragging")!==!0&&(n.collapse(0),n.setData("dragging",!0)),o=this.editor.get_canvas_coordinates(new M.assignfeedback_editpdf.point(r,s)),a=this.editor.get_canvas_bounds(!0),a.x=0,a.y=0,a.width-=24,a.height-=24,o.clip(a),this.x=o.x,this.y=o.y,u=this.editor.get_window_coordinates(o),i.setX(u.x),i.setY(u.y),this.drawable.store_position(i,u.x,u.y)}},null,this),n.on("gesturemoveend",function(){t.currentedit.tool==="select"&&(n.getData("dragging")===!0&&n.setData("dragging",!1),this.editor.save_current_page())},null,this),o.on("gesturemovestart",function(e){t.currentedit.tool==="select"&&(e.preventDefault(),n.setData("offsetx",e.clientX-i.getX()),n.setData("offsety",e.clientY-i.getY()),n.expand())}),o.on("gesturemove",function(e){if(t.currentedit.tool==="select"){var r=e.clientX-n.getData("offsetx"),s=e.clientY-n.getData("offsety"),o,u,a;n.getData("dragging")!==!0&&(n.collapse(100),n.setData("dragging",!0)),o=this.editor.get_canvas_coordinates(new M.assignfeedback_editpdf.point(r,s)),a=this.editor.get_canvas_bounds(!0),a.x=0,a.y=0,a.width-=24,a.height-=24,o.clip(a),this.x=o.x,this.y=o.y,u=this.editor.get_window_coordinates(o),i.setX(u.x),i.setY(u.y),this.drawable.store_position(i,u.x,u.y)}},null,this),o.on("gesturemoveend",function(){t.currentedit.tool==="select"&&(n.getData("dragging")===!0&&n.setData("dragging",!1),this.editor.save_current_page())},null,this),this.menu=new M.assignfeedback_editpdf.commentmenu({buttonNode:this.menulink,comment:this}))},this.remove=function(){var e=0,t;t=this.editor.pages[this.editor.currentpage].comments;for(e=0;e<t.length;e++)if(t[e]===this){t.splice(e,1),this.drawable.erase(),this.editor.save_current_page();return}},this.remove_from_quicklist=function(e,t){e.preventDefault(),e.stopPropagation(),this.menu.hide(),this.editor.quicklist.remove(t)},this.set_from_quick_comment=function(e,t){e.preventDefault(),this.menu.hide(),this.deleteme=!1,this.rawtext=t.rawtext,this.width=t.width,this.colour=t.colour,this.editor.save_current_page(),this.editor.redraw(),this.node=this.drawable.nodes[0].one("textarea"),this.node.ancestor("div").removeClass("commentcollapsed"),this.node.focus()},this.add_to_quicklist=function(e){e.preventDefault(),this.menu.hide(),this.editor.quicklist.add(this)},this.draw_current_edit=function(t){var n=new M.assignfeedback_editpdf.drawable(this.editor),r,i;return i=new M.assignfeedback_editpdf.rect,i.bound([t.start,t.end]),r=this.editor.graphic.addShape({type:e.Rect,width:i.width,height:i.height,fill:{color:f[t.commentcolour]},x:i.x,y:i.y}),n.shapes.push(r),n},this.init_from_edit=function(e){var t=new M.assignfeedback_editpdf.rect;return t.bound([e.start,e.end]),t.width<100&&(t.width=100),this.gradeid=this.editor.get("gradeid"),this.pageno=this.editor.currentpage,this.x=t.x,this.y=t.y,this.width=t.width,this.colour=e.commentcolour,this.rawtext="",t.has_min_width()&&t.has_min_height()}};M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.comment=B;var j=function(e,t,n,r){this.rawtext=t||"",this.id=e||0,this.width=n||100,this.colour=r||"yellow"};M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.quickcomment=j;var F=function(t){this.editor=t,this.comments=[],this.add=function(t){var r=n,i;if(t.rawtext==="")return;i={method:"post",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"addtoquicklist",userid:this.editor.get("userid"
-),commenttext:t.rawtext,width:t.width,colour:t.colour,attemptnumber:this.editor.get("attemptnumber"),assignmentid:this.editor.get("assignmentid")},on:{success:function(t,n){var r,i;try{r=e.JSON.parse(n.responseText);if(r.error)return new M.core.ajaxException(r);i=new M.assignfeedback_editpdf.quickcomment(r.id,r.rawtext,r.width,r.colour),this.comments.push(i),this.comments.sort(function(e,t){return e.rawtext.localeCompare(t.rawtext)})}catch(s){return new M.core.exception(s)}},failure:function(e,t){return M.core.exception(t.responseText)}}},e.io(r,i)},this.remove=function(t){var r=n,i;if(!t)return;i={method:"post",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"removefromquicklist",userid:this.editor.get("userid"),commentid:t.id,attemptnumber:this.editor.get("attemptnumber"),assignmentid:this.editor.get("assignmentid")},on:{success:function(){var e;e=this.comments.indexOf(t),e>=0&&this.comments.splice(e,1)},failure:function(e,t){return M.core.exception(t.responseText)}}},e.io(r,i)},this.load=function(){var t=n,r;r={method:"get",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"loadquicklist",userid:this.editor.get("userid"),attemptnumber:this.editor.get("attemptnumber"),assignmentid:this.editor.get("assignmentid")},on:{success:function(t,n){var r;try{r=e.JSON.parse(n.responseText);if(r.error)return new M.core.ajaxException(r);e.each(r,function(e){var t=new M.assignfeedback_editpdf.quickcomment(e.id,e.rawtext,e.width,e.colour);this.comments.push(t)},this),this.comments.sort(function(e,t){return e.rawtext.localeCompare(t.rawtext)})}catch(i){return new M.core.exception(i)}},failure:function(e,t){return M.core.exception(t.responseText)}}},e.io(t,r)}};M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.quickcommentlist=F;var I=function(){I.superclass.constructor.apply(this,arguments)};I.prototype={dialogue:null,panel:null,pagecount:0,currentpage:0,pages:[],documentstatus:0,loadingicon:null,pageimage:null,graphic:null,currentedit:new M.assignfeedback_editpdf.edit,currentdrawable:!1,drawables:[],currentcomment:null,currentannotation:null,lastannotation:null,lastannotationtool:"pen",quicklist:null,searchcommentswindow:null,currentstamp:null,stamps:[],editingcomment:!1,collapsecomments:!0,isPassiveSupported:!1,initializer:function(){var t;t=e.one("#"+this.get("linkid")),t&&(t.on("click",this.link_handler,this),t.on("key",this.link_handler,"down:13",this),require(["mod_assign/grading_review_panel"],function(n){var r=new n,i=r.getReviewPanel("assignfeedback_editpdf");i&&(i=e.one(i),i.empty(),t.ancestor(".fitem").hide(),this.open_in_panel(i)),this.currentedit.start=!1,this.currentedit.end=!1,this.get("readonly")||(this.quicklist=new M.assignfeedback_editpdf.quickcommentlist(this))}.bind(this)))},refresh_button_state:function(){var e,t,n,r;e=this.get_dialogue_element(s.COMMENTCOLOURBUTTON),n=M.util.image_url("background_colour_"+this.currentedit.commentcolour,"assignfeedback_editpdf"),e.one("img").setAttribute("src",n),this.currentedit.commentcolour==="clear"?e.one("img").setStyle("borderStyle","dashed"):e.one("img").setStyle("borderStyle","solid"),e=this.get_dialogue_element(s.ANNOTATIONCOLOURBUTTON),n=M.util.image_url("colour_"+this.currentedit.annotationcolour,"assignfeedback_editpdf"),e.one("img").setAttribute("src",n),t=this.get_dialogue_element(h[this.currentedit.tool]),t.addClass("assignfeedback_editpdf_selectedbutton"),t.setAttribute("aria-pressed","true"),r=this.get_dialogue_element(s.DRAWINGREGION),r.setAttribute("data-currenttool",this.currentedit.tool),e=this.get_dialogue_element(s.STAMPSBUTTON),e.one("img").setAttrs({src:this.get_stamp_image_url(this.currentedit.stamp),height:"16",width:"16"})},get_canvas_bounds:function(){var e=this.get_dialogue_element(s.DRAWINGCANVAS),t=e.getXY(),n=t[0],r=t[1],i=parseInt(e.getStyle("width"),10),o=parseInt(e.getStyle("height"),10);return new M.assignfeedback_editpdf.rect(n,r,i,o)},get_canvas_coordinates:function(e){var t=this.get_canvas_bounds(),n=new M.assignfeedback_editpdf.point(e.x-t.x,e.y-t.y);return t.x=t.y=0,n.clip(t),n},get_window_coordinates:function(e){var t=this.get_canvas_bounds(),n=new M.assignfeedback_editpdf.point(e.x+t.x,e.y+t.y);return n},open_in_panel:function(t){var n,r;this.panel=t,t.append(this.get("body")),t.addClass(i.DIALOGUE),this.loadingicon=this.get_dialogue_element(s.LOADINGICON),n=this.get_dialogue_element(s.DRAWINGCANVAS),this.graphic=new e.Graphic({render:n}),r=this.get_dialogue_element(s.DRAWINGREGION),r.on("scroll",this.move_canvas,this),this.get("readonly")||(n.on("gesturemovestart",this.edit_start,null,this),n.on("gesturemove",this.edit_move,null,this),n.on("gesturemoveend",this.edit_end,null,this),this.refresh_button_state()),this.start_generation()},link_handler:function(t){var n,r,o=!0;t.preventDefault(),this.dialogue||(this.dialogue=new M.core.dialogue({headerContent:this.get("header"),bodyContent:this.get("body"),footerContent:this.get("footer"),modal:!0,width:"840px",visible:!1,draggable:!0}),this.dialogue.get("boundingBox").addClass(i.DIALOGUE),this.loadingicon=this.get_dialogue_element(s.LOADINGICON),n=this.get_dialogue_element(s.DRAWINGCANVAS),this.graphic=new e.Graphic({render:n}),r=this.get_dialogue_element(s.DRAWINGREGION),r.on("scroll",this.move_canvas,this),this.get("readonly")||(n.on("gesturemovestart",this.edit_start,null,this),n.on("gesturemove",this.edit_move,null,this),n.on("gesturemoveend",this.edit_end,null,this),this.refresh_button_state()),this.start_generation(),n.on("windowresize",this.resize,this),o=!1),this.dialogue.centerDialogue(),this.dialogue.show(),this.dialogue.dd.on("drag:end",this.redraw,this),o&&this.resize()},start_generation:function(){this.poll_document_conversion_status()},poll_document_conversion_status:function(){if(this.get("destroyed"))return;e.io(n,{method:"get",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"pollconversions",userid:this.get("userid"),attemptnumber:this.get("attemptnumber"),assignmentid:this.get("assignmentid"
-),readonly:this.get("readonly")?1:0},on:{success:function(t,n){var r=this.handle_response_data(n),i=!1;if(r){this.documentstatus=r.status;if(r.status===0)i=!0;else if(r.status===1)i=!0;else if(r.status===2||r.status===-1)this.pagecount=r.pagecount,r.pageready==r.pagecount?this.prepare_pages_for_display(r):(this.update_page_load_progress(),this.start_document_to_image_conversion());i&&e.later(1e3,this,this.poll_document_conversion_status)}},failure:function(e,t){return new M.core.exception(t.responseText)}}})},start_document_to_image_conversion:function(){if(this.get("destroyed"))return;e.io(n,{method:"get",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"pollconversions",userid:this.get("userid"),attemptnumber:this.get("attemptnumber"),assignmentid:this.get("assignmentid"),readonly:this.get("readonly")?1:0},on:{success:function(e,t){var n=this.handle_response_data(t);n&&(this.documentstatus=n.status,n.status===2&&this.prepare_pages_for_display(n))},failure:function(e,t){return new M.core.exception(t.responseText)}}})},prepare_pages_for_display:function(e){var t,n,r,i;if(!e.pagecount){this.dialogue&&this.dialogue.hide(),i=new M.core.alert({message:M.util.get_string("cannotopenpdf","assignfeedback_editpdf")}),i.show();return}this.pages=e.pages;for(t=0;t<this.pages.length;t++){for(n=0;n<this.pages[t].comments.length;n++)r=this.pages[t].comments[n],this.pages[t].comments[n]=new M.assignfeedback_editpdf.comment(this,r.gradeid,r.pageno,r.x,r.y,r.width,r.colour,r.rawtext);for(n=0;n<this.pages[t].annotations.length;n++)e=this.pages[t].annotations[n],this.pages[t].annotations[n]=this.create_annotation(e.type,e)}this.quicklist&&this.quicklist.load(),this.setup_navigation(),this.setup_toolbar(),this.change_page()},update_page_load_progress:function(){if(this.get("destroyed"))return;var t,n=0,i=this.get_dialogue_element(s.PROGRESSBARCONTAINER+" .bar");if(!i)return;t={method:"get",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"conversionstatus",userid:this.get("userid"),attemptnumber:this.get("attemptnumber"),assignmentid:this.get("assignmentid")},on:{success:function(i,o){if(this.get("destroyed"))return;n=0;var u=0,a=this.get_dialogue_element(s.PROGRESSBARCONTAINER+" .bar");a&&(u=o.response/this.pagecount*100,a.setStyle("width",u+"%"),a.ancestor(s.PROGRESSBARCONTAINER).setAttribute("aria-valuenow",u),u<100&&(M.util.js_pending("checkconversionstatus"),e.later(1e3,this,function(){M.util.js_complete("checkconversionstatus"),e.io(r,t)})))},failure:function(i,s){if(this.get("destroyed"))return;return n+=1,this.pagecount===0&&n<5&&(M.util.js_pending("checkconversionstatus"),e.later(1e3,this,function(){M.util.js_complete("checkconversionstatus"),e.io(r,t)})),new M.core.exception(s.responseText)}}},M.util.js_pending("checkconversionstatus"),e.later(1e3,this,function(){n=0,M.util.js_complete("checkconversionstatus"),e.io(r,t)})},handle_response_data:function(t){if(this.get("destroyed"))return;var n;try{n=e.JSON.parse(t.responseText);if(!n.error)return n;this.dialogue&&this.dialogue.hide(),new M.core.alert({message:M.util.get_string("cannotopenpdf","assignfeedback_editpdf"),visible:!0})}catch(r){this.dialogue&&this.dialogue.hide(),new M.core.alert({title:M.util.get_string("cannotopenpdf","assignfeedback_editpdf"),visible:!0})}return},get_stamp_image_url:function(t){var n=this.get("stampfiles"),r="";return e.Array.each(n,function(e){e.indexOf(t)>0&&(r=e)},this),r},setup_toolbar:function(){var t,n,r,i,o,u,a,c,p;i=this.get_dialogue_element(s.SEARCHCOMMENTSBUTTON),i.on("click",this.open_search_comments,this),i.on("key",this.open_search_comments,"down:13",this),o=this.get_dialogue_element(s.EXPCOLCOMMENTSBUTTON),o.on("click",this.expandCollapseComments,this),o.on("key",this.expandCollapseComments,"down:13",this);if(this.get("readonly"))return;this.check_passive_supported(),e.each(h,function(e,n){t=this.get_dialogue_element(e),t.on("click",this.handle_tool_button,this,n),t.on("key",this.handle_tool_button,"down:13",this,n),t.setAttribute("aria-pressed","false")},this),n=this.get_dialogue_element(s.COMMENTCOLOURBUTTON),c=new M.assignfeedback_editpdf.colourpicker({buttonNode:n,colours:f,iconprefix:"background_colour_",callback:function(e){var t=e.target.getAttribute("data-colour");t||(t=e.target.ancestor().getAttribute("data-colour")),this.currentedit.commentcolour=t,this.handle_tool_button(e,"comment")},context:this}),r=this.get_dialogue_element(s.ANNOTATIONCOLOURBUTTON),c=new M.assignfeedback_editpdf.colourpicker({buttonNode:r,iconprefix:"colour_",colours:l,callback:function(e){var t=e.target.getAttribute("data-colour");t||(t=e.target.ancestor().getAttribute("data-colour")),this.currentedit.annotationcolour=t,this.lastannotationtool?this.handle_tool_button(e,this.lastannotationtool):this.handle_tool_button(e,"pen")},context:this}),a=this.get("stampfiles"),a.length<=0?this.get_dialogue_element(h.stamp).ancestor().hide():(p=a[0].substr(a[0].lastIndexOf("/")+1),this.currentedit.stamp=p,u=this.get_dialogue_element(s.STAMPSBUTTON),c=new M.assignfeedback_editpdf.stamppicker({buttonNode:u,stamps:a,callback:function(e){var t=e.target.getAttribute("data-stamp"),n;t||(t=e.target.ancestor().getAttribute("data-stamp")),n=t.substr(t.lastIndexOf("/")),this.currentedit.stamp=n,this.handle_tool_button(e,"stamp")},context:this}),this.refresh_button_state())},handle_tool_button:function(e,t){var n;e.preventDefault(),n=this.get_dialogue_element(h[this.currentedit.tool]),n.removeClass("assignfeedback_editpdf_selectedbutton"),n.setAttribute("aria-pressed","false"),this.currentedit.tool=t,t!=="comment"&&t!=="select"&&t!=="drag"&&t!=="stamp"&&(this.lastannotationtool=t);var r=navigator.userAgent;r.includes("Safari")&&(t==="drag"?this.enable_touch_scroll():this.disable_touch_scroll()),this.refresh_button_state()},stringify_current_page:function(){var t=[],n=[],r,i=0;for(i=0;i<this.pages[this.currentpage].comments.length;i++)t[i]=this.pages[this.currentpage].comments[i].clean();for(i=0;i<this.pages[this.currentpage].annotations
-.length;i++)n[i]=this.pages[this.currentpage].annotations[i].clean();return r={comments:t,annotations:n},e.JSON.stringify(r)},get_current_drawable:function(){var e,t,n=!1;return!this.currentedit.start||!this.currentedit.end?!1:(this.currentedit.tool==="comment"?(e=new M.assignfeedback_editpdf.comment(this),n=e.draw_current_edit(this.currentedit)):(t=this.create_annotation(this.currentedit.tool,{}),t&&(n=t.draw_current_edit(this.currentedit))),n)},get_dialogue_element:function(e){return this.panel?this.panel.one(e):this.dialogue.get("boundingBox").one(e)},redraw_current_edit:function(){this.currentdrawable&&this.currentdrawable.erase(),this.currentdrawable=this.get_current_drawable()},edit_start:function(t){var n=this.get_dialogue_element(s.DRAWINGCANVAS),r=n.getXY(),i=n.get("docScrollY"),o=n.get("docScrollX"),u={x:t.clientX-r[0]+o,y:t.clientY-r[1]+i},a=!1;if(t.button===3)return;if(this.currentedit.starttime)return;if(this.editingcomment)return;this.currentedit.starttime=(new Date).getTime(),this.currentedit.start=u,this.currentedit.end={x:u.x,y:u.y};if(this.currentedit.tool==="select"){var f=this.currentedit.end.x,l=this.currentedit.end.y,c=this.pages[this.currentpage].annotations;e.each(c,function(e){(f-e.x)*(f-e.endx)<=0&&(l-e.y)*(l-e.endy)<=0&&(a=e)}),a?(this.lastannotation=this.currentannotation,this.currentannotation=a,this.lastannotation&&this.lastannotation!==a&&this.lastannotation.drawable&&(this.lastannotation.drawable.erase(),this.drawables.push(this.lastannotation.draw())),this.currentannotation.drawable&&this.currentannotation.drawable.erase(),this.drawables.push(this.currentannotation.draw())):(this.lastannotation=this.currentannotation,this.currentannotation=null,this.lastannotation&&this.lastannotation.drawable&&(this.lastannotation.drawable.erase(),this.drawables.push(this.lastannotation.draw())))}this.currentannotation&&(this.currentedit.annotationstart={x:this.currentannotation.x,y:this.currentannotation.y})},edit_move:function(e){e.preventDefault();var t=this.get_canvas_bounds(),n=this.get_dialogue_element(s.DRAWINGCANVAS),r=this.get_dialogue_element(s.DRAWINGREGION),i=new M.assignfeedback_editpdf.point(e.clientX+n.get("docScrollX"),e.clientY+n.get("docScrollY")),o=this.get_canvas_coordinates(i),u,a;if(o.x<0||o.x>t.width||o.y<0||o.y>t.height)return;this.currentedit.tool==="pen"&&this.currentedit.path.push(o),this.currentedit.tool==="select"?this.currentannotation&&this.currentedit&&this.currentannotation.move(this.currentedit.annotationstart.x+o.x-this.currentedit.start.x,this.currentedit.annotationstart.y+o.y-this.currentedit.start.y):this.currentedit.tool==="drag"?(u=o.x-this.currentedit.start.x,a=o.y-this.currentedit.start.y,r.getDOMNode().scrollLeft-=u,r.getDOMNode().scrollTop-=a):this.currentedit.start&&(this.currentedit.end=o,this.redraw_current_edit())},edit_end:function(){var e,t,n;e=(new Date).getTime()-this.currentedit.start;if(e<c||this.currentedit.start===!1)return;this.currentedit.tool==="comment"?(this.currentdrawable&&this.currentdrawable.erase(),this.currentdrawable=!1,t=new M.assignfeedback_editpdf.comment(this),t.init_from_edit(this.currentedit)&&(this.pages[this.currentpage].comments.push(t),this.drawables.push(t.draw(!0)),this.editingcomment=!0)):(n=this.create_annotation(this.currentedit.tool,{}),n&&(this.currentdrawable&&this.currentdrawable.erase(),this.currentdrawable=!1,n.init_from_edit(this.currentedit)&&(this.pages[this.currentpage].annotations.push(n),this.drawables.push(n.draw())))),this.save_current_page(),this.currentedit.starttime=0,this.currentedit.start=!1,this.currentedit.end=!1,this.currentedit.path=[]},resize:function(){var t,n;if(this.dialogue){if(!this.dialogue.get("visible"))return;this.dialogue.centerDialogue()}return n=e.one("body").get("winHeight")-120,n<100&&(n=100),t=this.get_dialogue_element(s.DRAWINGREGION),this.dialogue&&t.setStyle("maxHeight",n+"px"),this.redraw(),!0},create_annotation:function(e,t){return t.type=e,t.editor=this,e==="line"?new M.assignfeedback_editpdf.annotationline(t):e==="rectangle"?new M.assignfeedback_editpdf.annotationrectangle(t):e==="oval"?new M.assignfeedback_editpdf.annotationoval(t):e==="pen"?new M.assignfeedback_editpdf.annotationpen(t):e==="highlight"?new M.assignfeedback_editpdf.annotationhighlight(t):e==="stamp"?new M.assignfeedback_editpdf.annotationstamp(t):!1},save_current_page:function(){if(this.get("destroyed"))return;var t=n,r;r={method:"post",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"savepage",index:this.currentpage,userid:this.get("userid"),attemptnumber:this.get("attemptnumber"),assignmentid:this.get("assignmentid"),page:this.stringify_current_page()},on:{success:function(t,n){var r;try{r=e.JSON.parse(n.responseText);if(r.error)return new M.core.ajaxException(r);e.one(s.UNSAVEDCHANGESINPUT).set("value","true"),e.one(s.UNSAVEDCHANGESDIV).setStyle("opacity",1),e.one(s.UNSAVEDCHANGESDIV).setStyle("display","inline-block"),e.one(s.UNSAVEDCHANGESDIV).transition({duration:1,delay:2,opacity:0},function(){e.one(s.UNSAVEDCHANGESDIV).setStyle("display","none")})}catch(i){return new M.core.exception(i)}},failure:function(e,t){return new M.core.exception(t.responseText)}}},e.io(t,r)},open_search_comments:function(e){this.searchcommentswindow||(this.searchcommentswindow=new M.assignfeedback_editpdf.commentsearch({editor:this})),this.searchcommentswindow.show(),e.preventDefault()},expandCollapseComments:function(){var t=e.all(".commentdrawable");this.collapsecomments?(this.collapsecomments=!1,t.removeClass("commentcollapsed")):(this.collapsecomments=!0,t.addClass("commentcollapsed"))},redraw:function(){var e,t;t=this.pages[this.currentpage];if(t===undefined)return;while(this.drawables.length>0)this.drawables.pop().erase();for(e=0;e<t.annotations.length;e++)this.drawables.push(t.annotations[e].draw());for(e=0;e<t.comments.length;e++)this.drawables.push(t.comments[e].draw(!1))},change_page:function(){var e=this.get_dialogue_element(s.DRAWINGCANVAS),t,n,r;n=this.get_dialogue_element(s
-.PREVIOUSBUTTON),r=this.get_dialogue_element(s.NEXTBUTTON),this.currentpage>0?n.removeAttribute("disabled"):n.setAttribute("disabled","true"),this.currentpage<this.pagecount-1?r.removeAttribute("disabled"):r.setAttribute("disabled","true"),t=this.pages[this.currentpage],this.loadingicon.hide(),e.setStyle("backgroundImage",'url("'+t.url+'")'),e.setStyle("width",t.width+"px"),e.setStyle("height",t.height+"px"),this.get_dialogue_element(s.PAGESELECT).set("selectedIndex",this.currentpage),this.resize()},setup_navigation:function(){var t,n,r,i,o,u;t=this.get_dialogue_element(s.PAGESELECT);var a=t.all("option");if(a.size()<=1)for(n=0;n<this.pages.length;n++)i=e.Node.create("<option/>"),i.setAttribute("value",n),r={page:n+1,total:this.pages.length},i.setHTML(M.util.get_string("pagexofy","assignfeedback_editpdf",r)),t.append(i);t.removeAttribute("disabled"),t.on("change",function(){this.currentpage=t.get("value"),this.change_page()},this),o=this.get_dialogue_element(s.PREVIOUSBUTTON),u=this.get_dialogue_element(s.NEXTBUTTON),o.on("click",this.previous_page,this),o.on("key",this.previous_page,"down:13",this),u.on("click",this.next_page,this),u.on("key",this.next_page,"down:13",this)},previous_page:function(e){e.preventDefault(),this.currentpage--,this.currentpage<0&&(this.currentpage=0),this.change_page()},next_page:function(e){e.preventDefault(),this.currentpage++,this.currentpage>=this.pages.length&&(this.currentpage=this.pages.length-1),this.change_page()},move_canvas:function(){var e,t,n,r;e=this.get_dialogue_element(s.DRAWINGREGION),t=parseInt(e.get("scrollLeft"),10),n=parseInt(e.get("scrollTop"),10);for(r=0;r<this.drawables.length;r++)this.drawables[r].scroll_update(t,n)},check_passive_supported:function(){try{var e=Object.defineProperty&&Object.defineProperty({},"passive",{get:function(){this.isPassiveSupported=!0}.bind(this)});document.addEventListener("touchmove",e,e),document.removeEventListener("touchmove",e,e)}catch(t){this.isPassiveSupported=!1}},disable_touch_scroll:function(){var e=this.get_dialogue_element(s.DRAWINGREGION);e.setStyle("overflow","hidden"),this.isPassiveSupported&&document.addEventListener("touchmove",this.stop_touch_scroll,{passive:!1})},enable_touch_scroll:function(){var e=this.get_dialogue_element(s.DRAWINGREGION);e.setStyle("overflow","auto"),this.isPassiveSupported&&document.removeEventListener("touchmove",this.stop_touch_scroll,{passive:!1})},stop_touch_scroll:function(e){e.stopPropagation(),e.preventDefault()}},e.extend(I,e.Base,I.prototype,{NAME:"moodle-assignfeedback_editpdf-editor",ATTRS:{userid:{validator:e.Lang.isInteger,value:0},assignmentid:{validator:e.Lang.isInteger,value:0},attemptnumber:{validator:e.Lang.isInteger,value:0},header:{validator:e.Lang.isString,value:""},body:{validator:e.Lang.isString,value:""},footer:{validator:e.Lang.isString,value:""},linkid:{validator:e.Lang.isString,value:""},deletelinkid:{validator:e.Lang.isString,value:""},readonly:{validator:e.Lang.isBoolean,value:!0},stampfiles:{validator:e.Lang.isArray,value:""}}}),M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.editor=M.assignfeedback_editpdf.editor||{},M.assignfeedback_editpdf.editor.init=M.assignfeedback_editpdf.editor.init||function(e){return typeof M.assignfeedback_editpdf.instance!="undefined"&&M.assignfeedback_editpdf.instance.destroy(),M.assignfeedback_editpdf.instance=new I(e),M.assignfeedback_editpdf.instance}},"@VERSION@",{requires:["base","event","node","io","graphics","json","event-move","event-resize","transition","querystring-stringify-simple","moodle-core-notification-dialog","moodle-core-notification-alert","moodle-core-notification-exception","moodle-core-notification-ajaxexception"]});
+),commenttext:t.rawtext,width:t.width,colour:t.colour,attemptnumber:this.editor.get("attemptnumber"),assignmentid:this.editor.get("assignmentid")},on:{success:function(t,n){var r,i;try{r=e.JSON.parse(n.responseText);if(r.error)return new M.core.ajaxException(r);i=new M.assignfeedback_editpdf.quickcomment(r.id,r.rawtext,r.width,r.colour),this.comments.push(i),this.comments.sort(function(e,t){return e.rawtext.localeCompare(t.rawtext)})}catch(s){return new M.core.exception(s)}},failure:function(e,t){return M.core.exception(t.responseText)}}},e.io(r,i)},this.remove=function(t){var r=n,i;if(!t)return;i={method:"post",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"removefromquicklist",userid:this.editor.get("userid"),commentid:t.id,attemptnumber:this.editor.get("attemptnumber"),assignmentid:this.editor.get("assignmentid")},on:{success:function(){var e;e=this.comments.indexOf(t),e>=0&&this.comments.splice(e,1)},failure:function(e,t){return M.core.exception(t.responseText)}}},e.io(r,i)},this.load=function(){var t=n,r;r={method:"get",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"loadquicklist",userid:this.editor.get("userid"),attemptnumber:this.editor.get("attemptnumber"),assignmentid:this.editor.get("assignmentid")},on:{success:function(t,n){var r;try{r=e.JSON.parse(n.responseText);if(r.error)return new M.core.ajaxException(r);e.each(r,function(e){var t=new M.assignfeedback_editpdf.quickcomment(e.id,e.rawtext,e.width,e.colour);this.comments.push(t)},this),this.comments.sort(function(e,t){return e.rawtext.localeCompare(t.rawtext)})}catch(i){return new M.core.exception(i)}},failure:function(e,t){return M.core.exception(t.responseText)}}},e.io(t,r)}};M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.quickcommentlist=F;var I=function(){I.superclass.constructor.apply(this,arguments)};I.prototype={dialogue:null,panel:null,pagecount:0,currentpage:0,pages:[],documentstatus:0,loadingicon:null,pageimage:null,graphic:null,currentedit:new M.assignfeedback_editpdf.edit,currentdrawable:!1,drawables:[],currentcomment:null,currentannotation:null,lastannotation:null,lastannotationtool:"pen",quicklist:null,searchcommentswindow:null,currentstamp:null,stamps:[],editingcomment:!1,collapsecomments:!0,initializer:function(){var t;t=e.one("#"+this.get("linkid")),t&&(t.on("click",this.link_handler,this),t.on("key",this.link_handler,"down:13",this),require(["mod_assign/grading_review_panel"],function(n){var r=new n,i=r.getReviewPanel("assignfeedback_editpdf");i&&(i=e.one(i),i.empty(),t.ancestor(".fitem").hide(),this.open_in_panel(i)),this.currentedit.start=!1,this.currentedit.end=!1,this.get("readonly")||(this.quicklist=new M.assignfeedback_editpdf.quickcommentlist(this))}.bind(this)))},refresh_button_state:function(){var e,t,n,r;e=this.get_dialogue_element(s.COMMENTCOLOURBUTTON),n=M.util.image_url("background_colour_"+this.currentedit.commentcolour,"assignfeedback_editpdf"),e.one("img").setAttribute("src",n),this.currentedit.commentcolour==="clear"?e.one("img").setStyle("borderStyle","dashed"):e.one("img").setStyle("borderStyle","solid"),e=this.get_dialogue_element(s.ANNOTATIONCOLOURBUTTON),n=M.util.image_url("colour_"+this.currentedit.annotationcolour,"assignfeedback_editpdf"),e.one("img").setAttribute("src",n),t=this.get_dialogue_element(h[this.currentedit.tool]),t.addClass("assignfeedback_editpdf_selectedbutton"),t.setAttribute("aria-pressed","true"),r=this.get_dialogue_element(s.DRAWINGREGION),r.setAttribute("data-currenttool",this.currentedit.tool),e=this.get_dialogue_element(s.STAMPSBUTTON),e.one("img").setAttrs({src:this.get_stamp_image_url(this.currentedit.stamp),height:"16",width:"16"})},get_canvas_bounds:function(){var e=this.get_dialogue_element(s.DRAWINGCANVAS),t=e.getXY(),n=t[0],r=t[1],i=parseInt(e.getStyle("width"),10),o=parseInt(e.getStyle("height"),10);return new M.assignfeedback_editpdf.rect(n,r,i,o)},get_canvas_coordinates:function(e){var t=this.get_canvas_bounds(),n=new M.assignfeedback_editpdf.point(e.x-t.x,e.y-t.y);return t.x=t.y=0,n.clip(t),n},get_window_coordinates:function(e){var t=this.get_canvas_bounds(),n=new M.assignfeedback_editpdf.point(e.x+t.x,e.y+t.y);return n},open_in_panel:function(t){var n,r;this.panel=t,t.append(this.get("body")),t.addClass(i.DIALOGUE),this.loadingicon=this.get_dialogue_element(s.LOADINGICON),n=this.get_dialogue_element(s.DRAWINGCANVAS),this.graphic=new e.Graphic({render:n}),r=this.get_dialogue_element(s.DRAWINGREGION),r.on("scroll",this.move_canvas,this),this.get("readonly")||(n.on("gesturemovestart",this.edit_start,null,this),n.on("gesturemove",this.edit_move,null,this),n.on("gesturemoveend",this.edit_end,null,this),this.refresh_button_state()),this.start_generation()},link_handler:function(t){var n,r,o=!0;t.preventDefault(),this.dialogue||(this.dialogue=new M.core.dialogue({headerContent:this.get("header"),bodyContent:this.get("body"),footerContent:this.get("footer"),modal:!0,width:"840px",visible:!1,draggable:!0}),this.dialogue.get("boundingBox").addClass(i.DIALOGUE),this.loadingicon=this.get_dialogue_element(s.LOADINGICON),n=this.get_dialogue_element(s.DRAWINGCANVAS),this.graphic=new e.Graphic({render:n}),r=this.get_dialogue_element(s.DRAWINGREGION),r.on("scroll",this.move_canvas,this),this.get("readonly")||(n.on("gesturemovestart",this.edit_start,null,this),n.on("gesturemove",this.edit_move,null,this),n.on("gesturemoveend",this.edit_end,null,this),this.refresh_button_state()),this.start_generation(),n.on("windowresize",this.resize,this),o=!1),this.dialogue.centerDialogue(),this.dialogue.show(),this.dialogue.dd.on("drag:end",this.redraw,this),o&&this.resize()},start_generation:function(){this.poll_document_conversion_status()},poll_document_conversion_status:function(){if(this.get("destroyed"))return;e.io(n,{method:"get",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"pollconversions",userid:this.get("userid"),attemptnumber:this.get("attemptnumber"),assignmentid:this.get("assignmentid"),readonly:this.get("readonly"
+)?1:0},on:{success:function(t,n){var r=this.handle_response_data(n),i=!1;if(r){this.documentstatus=r.status;if(r.status===0)i=!0;else if(r.status===1)i=!0;else if(r.status===2||r.status===-1)this.pagecount=r.pagecount,r.pageready==r.pagecount?this.prepare_pages_for_display(r):(this.update_page_load_progress(),this.start_document_to_image_conversion());i&&e.later(1e3,this,this.poll_document_conversion_status)}},failure:function(e,t){return new M.core.exception(t.responseText)}}})},start_document_to_image_conversion:function(){if(this.get("destroyed"))return;e.io(n,{method:"get",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"pollconversions",userid:this.get("userid"),attemptnumber:this.get("attemptnumber"),assignmentid:this.get("assignmentid"),readonly:this.get("readonly")?1:0},on:{success:function(e,t){var n=this.handle_response_data(t);n&&(this.documentstatus=n.status,n.status===2&&this.prepare_pages_for_display(n))},failure:function(e,t){return new M.core.exception(t.responseText)}}})},prepare_pages_for_display:function(e){var t,n,r,i;if(!e.pagecount){this.dialogue&&this.dialogue.hide(),i=new M.core.alert({message:M.util.get_string("cannotopenpdf","assignfeedback_editpdf")}),i.show();return}this.pages=e.pages;for(t=0;t<this.pages.length;t++){for(n=0;n<this.pages[t].comments.length;n++)r=this.pages[t].comments[n],this.pages[t].comments[n]=new M.assignfeedback_editpdf.comment(this,r.gradeid,r.pageno,r.x,r.y,r.width,r.colour,r.rawtext);for(n=0;n<this.pages[t].annotations.length;n++)e=this.pages[t].annotations[n],this.pages[t].annotations[n]=this.create_annotation(e.type,e)}this.quicklist&&this.quicklist.load(),this.setup_navigation(),this.setup_toolbar(),this.change_page()},update_page_load_progress:function(){if(this.get("destroyed"))return;var t,n=0,i=this.get_dialogue_element(s.PROGRESSBARCONTAINER+" .bar");if(!i)return;t={method:"get",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"conversionstatus",userid:this.get("userid"),attemptnumber:this.get("attemptnumber"),assignmentid:this.get("assignmentid")},on:{success:function(i,o){if(this.get("destroyed"))return;n=0;var u=0,a=this.get_dialogue_element(s.PROGRESSBARCONTAINER+" .bar");a&&(u=o.response/this.pagecount*100,a.setStyle("width",u+"%"),a.ancestor(s.PROGRESSBARCONTAINER).setAttribute("aria-valuenow",u),u<100&&(M.util.js_pending("checkconversionstatus"),e.later(1e3,this,function(){M.util.js_complete("checkconversionstatus"),e.io(r,t)})))},failure:function(i,s){if(this.get("destroyed"))return;return n+=1,this.pagecount===0&&n<5&&(M.util.js_pending("checkconversionstatus"),e.later(1e3,this,function(){M.util.js_complete("checkconversionstatus"),e.io(r,t)})),new M.core.exception(s.responseText)}}},M.util.js_pending("checkconversionstatus"),e.later(1e3,this,function(){n=0,M.util.js_complete("checkconversionstatus"),e.io(r,t)})},handle_response_data:function(t){if(this.get("destroyed"))return;var n;try{n=e.JSON.parse(t.responseText);if(!n.error)return n;this.dialogue&&this.dialogue.hide(),new M.core.alert({message:M.util.get_string("cannotopenpdf","assignfeedback_editpdf"),visible:!0})}catch(r){this.dialogue&&this.dialogue.hide(),new M.core.alert({title:M.util.get_string("cannotopenpdf","assignfeedback_editpdf"),visible:!0})}return},get_stamp_image_url:function(t){var n=this.get("stampfiles"),r="";return e.Array.each(n,function(e){e.indexOf(t)>0&&(r=e)},this),r},setup_toolbar:function(){var t,n,r,i,o,u,a,c,p;i=this.get_dialogue_element(s.SEARCHCOMMENTSBUTTON),i.on("click",this.open_search_comments,this),i.on("key",this.open_search_comments,"down:13",this),o=this.get_dialogue_element(s.EXPCOLCOMMENTSBUTTON),o.on("click",this.expandCollapseComments,this),o.on("key",this.expandCollapseComments,"down:13",this);if(this.get("readonly"))return;this.disable_touch_scroll(),e.each(h,function(e,n){t=this.get_dialogue_element(e),t.on("click",this.handle_tool_button,this,n),t.on("key",this.handle_tool_button,"down:13",this,n),t.setAttribute("aria-pressed","false")},this),n=this.get_dialogue_element(s.COMMENTCOLOURBUTTON),c=new M.assignfeedback_editpdf.colourpicker({buttonNode:n,colours:f,iconprefix:"background_colour_",callback:function(e){var t=e.target.getAttribute("data-colour");t||(t=e.target.ancestor().getAttribute("data-colour")),this.currentedit.commentcolour=t,this.handle_tool_button(e,"comment")},context:this}),r=this.get_dialogue_element(s.ANNOTATIONCOLOURBUTTON),c=new M.assignfeedback_editpdf.colourpicker({buttonNode:r,iconprefix:"colour_",colours:l,callback:function(e){var t=e.target.getAttribute("data-colour");t||(t=e.target.ancestor().getAttribute("data-colour")),this.currentedit.annotationcolour=t,this.lastannotationtool?this.handle_tool_button(e,this.lastannotationtool):this.handle_tool_button(e,"pen")},context:this}),a=this.get("stampfiles"),a.length<=0?this.get_dialogue_element(h.stamp).ancestor().hide():(p=a[0].substr(a[0].lastIndexOf("/")+1),this.currentedit.stamp=p,u=this.get_dialogue_element(s.STAMPSBUTTON),c=new M.assignfeedback_editpdf.stamppicker({buttonNode:u,stamps:a,callback:function(e){var t=e.target.getAttribute("data-stamp"),n;t||(t=e.target.ancestor().getAttribute("data-stamp")),n=t.substr(t.lastIndexOf("/")),this.currentedit.stamp=n,this.handle_tool_button(e,"stamp")},context:this}),this.refresh_button_state())},handle_tool_button:function(e,t){var n;e.preventDefault(),n=this.get_dialogue_element(h[this.currentedit.tool]),n.removeClass("assignfeedback_editpdf_selectedbutton"),n.setAttribute("aria-pressed","false"),this.currentedit.tool=t,t!=="comment"&&t!=="select"&&t!=="drag"&&t!=="stamp"&&(this.lastannotationtool=t),this.refresh_button_state()},stringify_current_page:function(){var t=[],n=[],r,i=0;for(i=0;i<this.pages[this.currentpage].comments.length;i++)t[i]=this.pages[this.currentpage].comments[i].clean();for(i=0;i<this.pages[this.currentpage].annotations.length;i++)n[i]=this.pages[this.currentpage].annotations[i].clean();return r={comments:t,annotations:n},e.JSON.stringify(r)},get_current_drawable
+:function(){var e,t,n=!1;return!this.currentedit.start||!this.currentedit.end?!1:(this.currentedit.tool==="comment"?(e=new M.assignfeedback_editpdf.comment(this),n=e.draw_current_edit(this.currentedit)):(t=this.create_annotation(this.currentedit.tool,{}),t&&(n=t.draw_current_edit(this.currentedit))),n)},get_dialogue_element:function(e){return this.panel?this.panel.one(e):this.dialogue.get("boundingBox").one(e)},redraw_current_edit:function(){this.currentdrawable&&this.currentdrawable.erase(),this.currentdrawable=this.get_current_drawable()},edit_start:function(t){var n=this.get_dialogue_element(s.DRAWINGCANVAS),r=n.getXY(),i=n.get("docScrollY"),o=n.get("docScrollX"),u={x:t.clientX-r[0]+o,y:t.clientY-r[1]+i},a=!1;if(t.button===3)return;if(this.currentedit.starttime)return;if(this.editingcomment)return;this.currentedit.starttime=(new Date).getTime(),this.currentedit.start=u,this.currentedit.end={x:u.x,y:u.y};if(this.currentedit.tool==="select"){var f=this.currentedit.end.x,l=this.currentedit.end.y,c=this.pages[this.currentpage].annotations;e.each(c,function(e){(f-e.x)*(f-e.endx)<=0&&(l-e.y)*(l-e.endy)<=0&&(a=e)}),a?(this.lastannotation=this.currentannotation,this.currentannotation=a,this.lastannotation&&this.lastannotation!==a&&this.lastannotation.drawable&&(this.lastannotation.drawable.erase(),this.drawables.push(this.lastannotation.draw())),this.currentannotation.drawable&&this.currentannotation.drawable.erase(),this.drawables.push(this.currentannotation.draw())):(this.lastannotation=this.currentannotation,this.currentannotation=null,this.lastannotation&&this.lastannotation.drawable&&(this.lastannotation.drawable.erase(),this.drawables.push(this.lastannotation.draw())))}this.currentannotation&&(this.currentedit.annotationstart={x:this.currentannotation.x,y:this.currentannotation.y})},edit_move:function(e){e.preventDefault();var t=this.get_canvas_bounds(),n=this.get_dialogue_element(s.DRAWINGCANVAS),r=this.get_dialogue_element(s.DRAWINGREGION),i=new M.assignfeedback_editpdf.point(e.clientX+n.get("docScrollX"),e.clientY+n.get("docScrollY")),o=this.get_canvas_coordinates(i),u,a;if(o.x<0||o.x>t.width||o.y<0||o.y>t.height)return;this.currentedit.tool==="pen"&&this.currentedit.path.push(o),this.currentedit.tool==="select"?this.currentannotation&&this.currentedit&&this.currentannotation.move(this.currentedit.annotationstart.x+o.x-this.currentedit.start.x,this.currentedit.annotationstart.y+o.y-this.currentedit.start.y):this.currentedit.tool==="drag"?(u=o.x-this.currentedit.start.x,a=o.y-this.currentedit.start.y,r.getDOMNode().scrollLeft-=u,r.getDOMNode().scrollTop-=a):this.currentedit.start&&(this.currentedit.end=o,this.redraw_current_edit())},edit_end:function(){var e,t,n;e=(new Date).getTime()-this.currentedit.start;if(e<c||this.currentedit.start===!1)return;this.currentedit.tool==="comment"?(this.currentdrawable&&this.currentdrawable.erase(),this.currentdrawable=!1,t=new M.assignfeedback_editpdf.comment(this),t.init_from_edit(this.currentedit)&&(this.pages[this.currentpage].comments.push(t),this.drawables.push(t.draw(!0)),this.editingcomment=!0)):(n=this.create_annotation(this.currentedit.tool,{}),n&&(this.currentdrawable&&this.currentdrawable.erase(),this.currentdrawable=!1,n.init_from_edit(this.currentedit)&&(this.pages[this.currentpage].annotations.push(n),this.drawables.push(n.draw())))),this.save_current_page(),this.currentedit.starttime=0,this.currentedit.start=!1,this.currentedit.end=!1,this.currentedit.path=[]},resize:function(){var t,n;if(this.dialogue){if(!this.dialogue.get("visible"))return;this.dialogue.centerDialogue()}return n=e.one("body").get("winHeight")-120,n<100&&(n=100),t=this.get_dialogue_element(s.DRAWINGREGION),this.dialogue&&t.setStyle("maxHeight",n+"px"),this.redraw(),!0},create_annotation:function(e,t){return t.type=e,t.editor=this,e==="line"?new M.assignfeedback_editpdf.annotationline(t):e==="rectangle"?new M.assignfeedback_editpdf.annotationrectangle(t):e==="oval"?new M.assignfeedback_editpdf.annotationoval(t):e==="pen"?new M.assignfeedback_editpdf.annotationpen(t):e==="highlight"?new M.assignfeedback_editpdf.annotationhighlight(t):e==="stamp"?new M.assignfeedback_editpdf.annotationstamp(t):!1},save_current_page:function(){if(this.get("destroyed"))return;var t=n,r;r={method:"post",context:this,sync:!1,data:{sesskey:M.cfg.sesskey,action:"savepage",index:this.currentpage,userid:this.get("userid"),attemptnumber:this.get("attemptnumber"),assignmentid:this.get("assignmentid"),page:this.stringify_current_page()},on:{success:function(t,n){var r;try{r=e.JSON.parse(n.responseText);if(r.error)return new M.core.ajaxException(r);e.one(s.UNSAVEDCHANGESINPUT).set("value","true"),e.one(s.UNSAVEDCHANGESDIV).setStyle("opacity",1),e.one(s.UNSAVEDCHANGESDIV).setStyle("display","inline-block"),e.one(s.UNSAVEDCHANGESDIV).transition({duration:1,delay:2,opacity:0},function(){e.one(s.UNSAVEDCHANGESDIV).setStyle("display","none")})}catch(i){return new M.core.exception(i)}},failure:function(e,t){return new M.core.exception(t.responseText)}}},e.io(t,r)},open_search_comments:function(e){this.searchcommentswindow||(this.searchcommentswindow=new M.assignfeedback_editpdf.commentsearch({editor:this})),this.searchcommentswindow.show(),e.preventDefault()},expandCollapseComments:function(){var t=e.all(".commentdrawable");this.collapsecomments?(this.collapsecomments=!1,t.removeClass("commentcollapsed")):(this.collapsecomments=!0,t.addClass("commentcollapsed"))},redraw:function(){var e,t;t=this.pages[this.currentpage];if(t===undefined)return;while(this.drawables.length>0)this.drawables.pop().erase();for(e=0;e<t.annotations.length;e++)this.drawables.push(t.annotations[e].draw());for(e=0;e<t.comments.length;e++)this.drawables.push(t.comments[e].draw(!1))},change_page:function(){var e=this.get_dialogue_element(s.DRAWINGCANVAS),t,n,r;n=this.get_dialogue_element(s.PREVIOUSBUTTON),r=this.get_dialogue_element(s.NEXTBUTTON),this.currentpage>0?n.removeAttribute("disabled"):n.setAttribute("disabled","true"),this
+.currentpage<this.pagecount-1?r.removeAttribute("disabled"):r.setAttribute("disabled","true"),t=this.pages[this.currentpage],this.loadingicon.hide(),e.setStyle("backgroundImage",'url("'+t.url+'")'),e.setStyle("width",t.width+"px"),e.setStyle("height",t.height+"px"),this.get_dialogue_element(s.PAGESELECT).set("selectedIndex",this.currentpage),this.resize()},setup_navigation:function(){var t,n,r,i,o,u;t=this.get_dialogue_element(s.PAGESELECT);var a=t.all("option");if(a.size()<=1)for(n=0;n<this.pages.length;n++)i=e.Node.create("<option/>"),i.setAttribute("value",n),r={page:n+1,total:this.pages.length},i.setHTML(M.util.get_string("pagexofy","assignfeedback_editpdf",r)),t.append(i);t.removeAttribute("disabled"),t.on("change",function(){this.currentpage=t.get("value"),this.change_page()},this),o=this.get_dialogue_element(s.PREVIOUSBUTTON),u=this.get_dialogue_element(s.NEXTBUTTON),o.on("click",this.previous_page,this),o.on("key",this.previous_page,"down:13",this),u.on("click",this.next_page,this),u.on("key",this.next_page,"down:13",this)},previous_page:function(e){e.preventDefault(),this.currentpage--,this.currentpage<0&&(this.currentpage=0),this.change_page()},next_page:function(e){e.preventDefault(),this.currentpage++,this.currentpage>=this.pages.length&&(this.currentpage=this.pages.length-1),this.change_page()},move_canvas:function(){var e,t,n,r;e=this.get_dialogue_element(s.DRAWINGREGION),t=parseInt(e.get("scrollLeft"),10),n=parseInt(e.get("scrollTop"),10);for(r=0;r<this.drawables.length;r++)this.drawables[r].scroll_update(t,n)},event_listener_options_supported:function(){var e=!1,t,n="testpassiveeventoptions";try{t=Object.defineProperty({},"passive",{get:function(){e=!0}}),document.addEventListener(n,t,t),document.removeEventListener(n,t,t)}catch(r){e=!1}return e},disable_touch_scroll:function(){this.event_listener_options_supported()&&document.addEventListener("touchmove",this.stop_touch_scroll,{passive:!1})},stop_touch_scroll:function(e){e.stopPropagation(),e.preventDefault()}},e.extend(I,e.Base,I.prototype,{NAME:"moodle-assignfeedback_editpdf-editor",ATTRS:{userid:{validator:e.Lang.isInteger,value:0},assignmentid:{validator:e.Lang.isInteger,value:0},attemptnumber:{validator:e.Lang.isInteger,value:0},header:{validator:e.Lang.isString,value:""},body:{validator:e.Lang.isString,value:""},footer:{validator:e.Lang.isString,value:""},linkid:{validator:e.Lang.isString,value:""},deletelinkid:{validator:e.Lang.isString,value:""},readonly:{validator:e.Lang.isBoolean,value:!0},stampfiles:{validator:e.Lang.isArray,value:""}}}),M.assignfeedback_editpdf=M.assignfeedback_editpdf||{},M.assignfeedback_editpdf.editor=M.assignfeedback_editpdf.editor||{},M.assignfeedback_editpdf.editor.init=M.assignfeedback_editpdf.editor.init||function(e){return typeof M.assignfeedback_editpdf.instance!="undefined"&&M.assignfeedback_editpdf.instance.destroy(),M.assignfeedback_editpdf.instance=new I(e),M.assignfeedback_editpdf.instance}},"@VERSION@",{requires:["base","event","node","io","graphics","json","event-move","event-resize","transition","querystring-stringify-simple","moodle-core-notification-dialog","moodle-core-notification-alert","moodle-core-notification-exception","moodle-core-notification-ajaxexception"]});
diff --git a/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor.js b/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor.js
index 1716dfe3b1e..abc2f1e43ca 100644
--- a/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor.js
+++ b/mod/assign/feedback/editpdf/yui/build/moodle-assignfeedback_editpdf-editor/moodle-assignfeedback_editpdf-editor.js
@@ -3500,14 +3500,6 @@ EDITOR.prototype = {
      */
     collapsecomments: true,
 
-    /**
-     * Check if passive option is supported
-     * @property isPassiveSupported
-     * @type Boolean
-     * @public
-     */
-    isPassiveSupported : false,
-
     /**
      * Called during the initialisation process of the object.
      * @method initializer
@@ -4035,8 +4027,7 @@ EDITOR.prototype = {
         if (this.get('readonly')) {
             return;
         }
-        // Check if passive option is supported for event listener
-        this.check_passive_supported();
+        this.disable_touch_scroll();
 
         // Setup the tool buttons.
         Y.each(TOOLSELECTOR, function(selector, tool) {
@@ -4132,15 +4123,6 @@ EDITOR.prototype = {
             this.lastannotationtool = tool;
         }
 
-        var useragent = navigator.userAgent;
-        if (useragent.includes("Safari")) {
-            if (tool === "drag") {
-                this.enable_touch_scroll();
-            } else {
-                this.disable_touch_scroll();
-            }
-        }
-
         this.refresh_button_state();
     },
 
@@ -4688,51 +4670,49 @@ EDITOR.prototype = {
     },
 
     /**
-     * Check if Passive option is support
+     * Test the browser support for options objects on event listeners.
+     * @return Boolean
      */
-    check_passive_supported : function() {
+    event_listener_options_supported: function() {
+        var passivesupported = false,
+            options,
+            testeventname = "testpassiveeventoptions";
+
+        // Options support testing example from:
+        // https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
+
         try {
-            var options = Object.defineProperty && Object.defineProperty({}, 'passive', {
+            options = Object.defineProperty({}, "passive", {
                 get: function() {
-                    this.isPassiveSupported = true;
-                }.bind(this)
+                    passivesupported = true;
+                }
             });
 
-            document.addEventListener('touchmove', options, options);
-            document.removeEventListener('touchmove', options, options);
-
-        } catch (err) {
-            this.isPassiveSupported = false;
+            // We use an event name that is not likely to conflict with any real event.
+            document.addEventListener(testeventname, options, options);
+            // We remove the event listener as we have tested the options already.
+            document.removeEventListener(testeventname, options, options);
+        } catch(err) {
+            // It's already false.
+            passivesupported = false;
         }
+        return passivesupported;
     },
 
     /**
      * Disable Touch Move scrolling
      */
-    disable_touch_scroll : function() {
-        var drawingregion = this.get_dialogue_element(SELECTOR.DRAWINGREGION);
-        drawingregion.setStyle('overflow', 'hidden');
-        if (this.isPassiveSupported) {
+    disable_touch_scroll: function() {
+        if (this.event_listener_options_supported()) {
             document.addEventListener('touchmove', this.stop_touch_scroll, {passive: false});
         }
     },
 
-    /**
-     * Enable Touch Move scrolling
-     */
-    enable_touch_scroll : function() {
-        var drawingregion = this.get_dialogue_element(SELECTOR.DRAWINGREGION);
-        drawingregion.setStyle('overflow', 'auto');
-        if (this.isPassiveSupported) {
-            document.removeEventListener('touchmove', this.stop_touch_scroll, {passive: false});
-        }
-    },
-
     /**
      * Stop Touch Scrolling
      * @param {Object} e
      */
-    stop_touch_scroll : function(e) {
+    stop_touch_scroll: function(e) {
         e.stopPropagation();
         e.preventDefault();
     }
@@ -4803,6 +4783,7 @@ M.assignfeedback_editpdf.editor.init = M.assignfeedback_editpdf.editor.init || f
     return M.assignfeedback_editpdf.instance;
 };
 
+
 }, '@VERSION@', {
     "requires": [
         "base",
diff --git a/mod/assign/feedback/editpdf/yui/src/editor/js/editor.js b/mod/assign/feedback/editpdf/yui/src/editor/js/editor.js
index b11bccf443f..87b58bf6205 100644
--- a/mod/assign/feedback/editpdf/yui/src/editor/js/editor.js
+++ b/mod/assign/feedback/editpdf/yui/src/editor/js/editor.js
@@ -227,14 +227,6 @@ EDITOR.prototype = {
      */
     collapsecomments: true,
 
-    /**
-     * Check if passive option is supported
-     * @property isPassiveSupported
-     * @type Boolean
-     * @public
-     */
-    isPassiveSupported : false,
-
     /**
      * Called during the initialisation process of the object.
      * @method initializer
@@ -762,8 +754,7 @@ EDITOR.prototype = {
         if (this.get('readonly')) {
             return;
         }
-        // Check if passive option is supported for event listener
-        this.check_passive_supported();
+        this.disable_touch_scroll();
 
         // Setup the tool buttons.
         Y.each(TOOLSELECTOR, function(selector, tool) {
@@ -859,15 +850,6 @@ EDITOR.prototype = {
             this.lastannotationtool = tool;
         }
 
-        var useragent = navigator.userAgent;
-        if (useragent.includes("Safari")) {
-            if (tool === "drag") {
-                this.enable_touch_scroll();
-            } else {
-                this.disable_touch_scroll();
-            }
-        }
-
         this.refresh_button_state();
     },
 
@@ -1415,51 +1397,49 @@ EDITOR.prototype = {
     },
 
     /**
-     * Check if Passive option is support
+     * Test the browser support for options objects on event listeners.
+     * @return Boolean
      */
-    check_passive_supported : function() {
+    event_listener_options_supported: function() {
+        var passivesupported = false,
+            options,
+            testeventname = "testpassiveeventoptions";
+
+        // Options support testing example from:
+        // https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
+
         try {
-            var options = Object.defineProperty && Object.defineProperty({}, 'passive', {
+            options = Object.defineProperty({}, "passive", {
                 get: function() {
-                    this.isPassiveSupported = true;
-                }.bind(this)
+                    passivesupported = true;
+                }
             });
 
-            document.addEventListener('touchmove', options, options);
-            document.removeEventListener('touchmove', options, options);
-
-        } catch (err) {
-            this.isPassiveSupported = false;
+            // We use an event name that is not likely to conflict with any real event.
+            document.addEventListener(testeventname, options, options);
+            // We remove the event listener as we have tested the options already.
+            document.removeEventListener(testeventname, options, options);
+        } catch(err) {
+            // It's already false.
+            passivesupported = false;
         }
+        return passivesupported;
     },
 
     /**
      * Disable Touch Move scrolling
      */
-    disable_touch_scroll : function() {
-        var drawingregion = this.get_dialogue_element(SELECTOR.DRAWINGREGION);
-        drawingregion.setStyle('overflow', 'hidden');
-        if (this.isPassiveSupported) {
+    disable_touch_scroll: function() {
+        if (this.event_listener_options_supported()) {
             document.addEventListener('touchmove', this.stop_touch_scroll, {passive: false});
         }
     },
 
-    /**
-     * Enable Touch Move scrolling
-     */
-    enable_touch_scroll : function() {
-        var drawingregion = this.get_dialogue_element(SELECTOR.DRAWINGREGION);
-        drawingregion.setStyle('overflow', 'auto');
-        if (this.isPassiveSupported) {
-            document.removeEventListener('touchmove', this.stop_touch_scroll, {passive: false});
-        }
-    },
-
     /**
      * Stop Touch Scrolling
      * @param {Object} e
      */
-    stop_touch_scroll : function(e) {
+    stop_touch_scroll: function(e) {
         e.stopPropagation();
         e.preventDefault();
     }
@@ -1528,4 +1508,4 @@ M.assignfeedback_editpdf.editor.init = M.assignfeedback_editpdf.editor.init || f
 
     M.assignfeedback_editpdf.instance = new EDITOR(params);
     return M.assignfeedback_editpdf.instance;
-};
\ No newline at end of file
+};