Abstract Ace-specific code to adapter

services/web/public/coffee/ide/editor/directives/aceEditor.coffee

@@ -10,13 +10,14 @@ define [
 	"ide/editor/directives/aceEditor/spell-check/SpellCheckAdapter"
 	"ide/editor/directives/aceEditor/highlights/HighlightsManager"
 	"ide/editor/directives/aceEditor/cursor-position/CursorPositionManager"
+	"ide/editor/directives/aceEditor/cursor-position/CursorPositionAdapter"
 	"ide/editor/directives/aceEditor/track-changes/TrackChangesManager"
 	"ide/editor/directives/aceEditor/metadata/MetadataManager"
 	"ide/metadata/services/metadata"
 	"ide/graphics/services/graphics"
 	"ide/preamble/services/preamble"
     "ide/files/services/files"
-], (App, Ace, SearchBox, Vim, ModeList, UndoManager, AutoCompleteManager, SpellCheckManager, SpellCheckAdapter, HighlightsManager, CursorPositionManager, TrackChangesManager, MetadataManager) ->
+], (App, Ace, SearchBox, Vim, ModeList, UndoManager, AutoCompleteManager, SpellCheckManager, SpellCheckAdapter, HighlightsManager, CursorPositionManager, CursorPositionAdapter, TrackChangesManager, MetadataManager) ->
 	EditSession = ace.require('ace/edit_session').EditSession
 	ModeList = ace.require('ace/ext/modelist')
 	Vim = ace.require('ace/keyboard/vim').Vim
@@ -108,7 +109,7 @@ define [
 
 				undoManager           = new UndoManager(scope, editor, element)
 				highlightsManager     = new HighlightsManager(scope, editor, element)
-				cursorPositionManager = new CursorPositionManager(scope, editor, element, localStorage)
+				cursorPositionManager = new CursorPositionManager(scope, new CursorPositionAdapter(editor), localStorage)
 				trackChangesManager   = new TrackChangesManager(scope, editor, element)
 				metadataManager = new MetadataManager(scope, editor, element, metadata)
 				autoCompleteManager = new AutoCompleteManager(scope, editor, element, metadataManager, graphics, preamble, files)
@@ -380,6 +381,21 @@ define [
 					editor.off 'changeSession', onSessionChangeForSpellCheck
 					editor.off 'nativecontextmenu', spellCheckManager.onContextMenu
 
+				onSessionChangeForCursorPosition = (e) ->
+					cursorPositionManager.onSessionChange(e)
+					e.oldSession?.selection.off 'changeCursor', cursorPositionManager.onCursorChange
+					e.session.selection.on 'changeCursor', cursorPositionManager.onCursorChange
+
+				initCursorPosition = () ->
+					cursorPositionManager.init()
+					editor.on 'changeSession', onSessionChangeForCursorPosition
+					onSessionChangeForCursorPosition({ session: editor.getSession() }) # Force initial setup
+					$(window).on "unload", () ->
+						cursorPositionManager.onUnload(editor.getSession())
+
+				tearDownCursorPosition = () ->
+					editor.off 'changeSession', onSessionChangeForCursorPosition
+
 				attachToAce = (sharejs_doc) ->
 					lines = sharejs_doc.getSnapshot().split("\n")
 					session = editor.getSession()
@@ -426,6 +442,7 @@ define [
 					# now ready to edit document
 					editor.setReadOnly(scope.readOnly) # respect the readOnly setting, normally false
 					initSpellCheck()
+					initCursorPosition()
 
 					resetScrollMargins()
 
@@ -488,6 +505,7 @@ define [
 				scope.$on '$destroy', () ->
 					if scope.sharejsDoc?
 						tearDownSpellCheck()
+						tearDownCursorPosition()
 						detachFromAce(scope.sharejsDoc)
 						session = editor.getSession()
 						session?.destroy()

services/web/public/coffee/ide/editor/directives/aceEditor/cursor-position/CursorPositionAdapter.coffee

@@ -0,0 +1,35 @@
+define [
+	"ide/editor/AceShareJsCodec"
+], (AceShareJsCodec) ->
+	class CursorPositionAdapter
+		constructor: (@editor) ->
+
+		getCursor: () ->
+			@editor.getCursorPosition()
+
+		getCursorForSession: (session) ->
+			session.selection.getCursor()
+
+		getScrollTopForSession: (session) ->
+			session.getScrollTop()
+
+		setCursor: (pos) ->
+			pos = pos.cursorPosition or { row: 0, column: 0 }
+			@editor.moveCursorToPosition(pos)
+
+		setScrollTop: (pos) ->
+			pos = pos.scrollTop or 0
+			@editor.getSession().setScrollTop(pos)
+
+		clearSelection: () ->
+			@editor.selection.clearSelection()
+
+		gotoLine: (line, column) ->
+			@editor.gotoLine(line, column)
+			@editor.scrollToLine(line, true, true) # centre and animate
+			@editor.focus()
+
+		gotoOffset: (offset) ->
+			lines = @editor.getSession().getDocument().getAllLines()
+			position = AceShareJsCodec.shareJsOffsetToAcePosition(offset, lines)
+			@gotoLine(position.row + 1, position.column)

services/web/public/coffee/ide/editor/directives/aceEditor/cursor-position/CursorPositionManager.coffee

@@ -1,75 +1,60 @@
-define [
-	"ide/editor/AceShareJsCodec"
-], (AceShareJsCodec) ->
+define [], () ->
 	class CursorPositionManager
-		constructor: (@$scope, @editor, @element, @localStorage) ->
+		constructor: (@$scope, @adapter, @localStorage) ->
+			@$scope.$on "#{@$scope.name}:gotoLine", (e, line, column) =>
+				if line?
+					setTimeout () =>
+						@adapter.gotoLine(line, column)
+					, 10 # Hack: Must happen after @gotoStoredPosition
 			
-			onChangeCursor = (e) =>
-				@emitCursorUpdateEvent(e)
+			@$scope.$on "#{@$scope.name}:gotoOffset", (e, offset) =>
+				if offset?
+					setTimeout () =>
+						@adapter.gotoOffset(offset)
+					, 10 # Hack: Must happen after @gotoStoredPosition
 
-			@editor.on "changeSession", (e) =>
+			@$scope.$on "#{@$scope.name}:clearSelection", (e) =>
+				@adapter.clearSelection()
+
+		init: () ->
+			@emitCursorUpdateEvent()
+
+		onSessionChange: (e) =>
 			if e.oldSession?
 				@storeCursorPosition(e.oldSession)
 				@storeScrollTopPosition(e.oldSession)
 
 			@doc_id = @$scope.sharejsDoc?.doc_id
 
-				e.oldSession?.selection.off 'changeCursor', onChangeCursor
-				e.session.selection.on 'changeCursor', onChangeCursor
-
 			setTimeout () =>
 				@gotoStoredPosition()
 			, 0
 
-			$(window).on "unload", () =>
-				@storeCursorPosition(@editor.getSession())
-				@storeScrollTopPosition(@editor.getSession())
+		onUnload: (session) =>
+			@storeCursorPosition(session)
+			@storeScrollTopPosition(session)
 
-			@$scope.$on "#{@$scope.name}:gotoLine", (e, line, column) =>
-				if line?
-					setTimeout () =>
-						@gotoLine(line, column)
-					, 10 # Hack: Must happen after @gotoStoredPosition
-			
-			@$scope.$on "#{@$scope.name}:gotoOffset", (e, offset) =>
-				if offset?
-					setTimeout () =>
-						@gotoOffset(offset)
-					, 10 # Hack: Must happen after @gotoStoredPosition
-
-			@$scope.$on "#{@$scope.name}:clearSelection", (e) =>
-				@editor.selection.clearSelection()
+		onCursorChange: () =>
+			@emitCursorUpdateEvent()
 
 		storeScrollTopPosition: (session) ->
 			if @doc_id?
 				docPosition = @localStorage("doc.position.#{@doc_id}") || {}
-				docPosition.scrollTop = session.getScrollTop()
+				docPosition.scrollTop = @adapter.getScrollTopForSession(session)
 				@localStorage("doc.position.#{@doc_id}", docPosition)
 
 		storeCursorPosition: (session) ->
 			if @doc_id?
 				docPosition = @localStorage("doc.position.#{@doc_id}") || {}
-				docPosition.cursorPosition = session.selection.getCursor()
+				docPosition.cursorPosition = @adapter.getCursorForSession(session)
 				@localStorage("doc.position.#{@doc_id}", docPosition)
 
 		emitCursorUpdateEvent: () ->
-			cursor = @editor.getCursorPosition()
+			cursor = @adapter.getCursor()
 			@$scope.$emit "cursor:#{@$scope.name}:update", cursor
 
 		gotoStoredPosition: () ->
 			return if !@doc_id?
 			pos = @localStorage("doc.position.#{@doc_id}") || {}
-			@ignoreCursorPositionChanges = true
-			@editor.moveCursorToPosition(pos.cursorPosition or {row: 0, column: 0})
-			@editor.getSession().setScrollTop(pos.scrollTop or 0)
-			delete @ignoreCursorPositionChanges
-
-		gotoLine: (line, column) ->
-			@editor.gotoLine(line, column)
-			@editor.scrollToLine(line,true,true) # centre and animate
-			@editor.focus()
-
-		gotoOffset: (offset) ->
-			lines = @editor.getSession().getDocument().getAllLines()
-			position = AceShareJsCodec.shareJsOffsetToAcePosition(offset, lines)
-			@gotoLine(position.row + 1, position.column)
+			@adapter.setCursor(pos)
+			@adapter.setScrollTop(pos)