David T. Lewis uploaded a new version of Morphic to project The Trunk:
http://source.squeak.org/trunk/Morphic-dtl.1367.mcz

==================== Summary ====================

Name: Morphic-dtl.1367
Author: dtl
Time: 16 November 2017, 7:56:42.140175 pm
UUID: 3aa19889-422e-41c5-93d0-73bbcfaf7c00
Ancestors: Morphic-dtl.1366

enterAsActiveSubprojectWithin: is currently meaningful only for Morphic projects, so move it from Project to MorphicProject. Original method stamp preserved.

=============== Diff against Morphic-dtl.1366 ===============

Item was added:
+ ----- Method: MorphicProject>>enterAsActiveSubprojectWithin: (in category 'enter') -----
+ enterAsActiveSubprojectWithin: enclosingWorld
+ 
+     "Install my ChangeSet, Transcript, and scheduled views as current globals. 
+ 
+     If returningFlag is true, we will return to the project from whence the current project was entered; don't change its previousProject link in this case.
+     If saveForRevert is true, save the ImageSegment of the project being left.
+     If revertFlag is true, make stubs for the world of the project being left.
+     If revertWithoutAsking is true in the project being left, then always revert."
+ 
+     "Experimental mods for initial multi-project work:
+         1. assume in morphic (this eliminated need for <showZoom>)
+         2. assume <saveForRevert> is false (usual case) - removed <old>
+         3. assume <revertFlag> is false
+         4. assume <revertWithoutAsking> is false - <forceRevert> now auto false <seg> n.u.
+         5. no zooming
+         6. assume <projectsSentToDisk> false - could be dangerous here
+         7. assume no isolation problems (isolationHead ==)
+         8. no closing scripts
+     "
+ 
+     self isCurrentProject ifTrue: [^ self].
+ 
+     "guards ifNotNil: [
+         guards := guards reject: [:obj | obj isNil].
+         guards do: [:obj | obj okayToEnterProject ifFalse: [^ self]]
+     ]."
+ 
+         "CurrentProject makeThumbnail."
+         "--> Display bestGuessOfCurrentWorld triggerClosingScripts."
+     CurrentProject displayDepth: Display depth.
+ 
+     displayDepth == nil ifTrue: [displayDepth := Display depth].
+         "Display newDepthNoRestore: displayDepth."
+ 
+         "(world hasProperty: #letTheMusicPlay)
+             ifTrue: [world removeProperty: #letTheMusicPlay]
+             ifFalse: [Smalltalk at: #ScorePlayer ifPresent: [:playerClass | 
+                         playerClass allSubInstancesDo: [:player | player pause]]]."
+ 
+         "returningFlag
+             ifTrue: [nextProject := CurrentProject]
+             ifFalse: [previousProject := CurrentProject]."
+ 
+         "CurrentProject saveState."
+         "CurrentProject := self."
+         "Smalltalk newChanges: changeSet."
+         "TranscriptStream newTranscript: transcript."
+         "Sensor flushKeyboard."
+         "recorderOrNil := Display pauseMorphicEventRecorder."
+ 
+         "Display changeMorphicWorldTo: world."  "Signifies Morphic"
+     world 
+         installAsActiveSubprojectIn: enclosingWorld 
+         titled: self name.
+ 
+         "recorderOrNil ifNotNil: [recorderOrNil resumeIn: world]."
+     world triggerOpeningScripts.
+     self removeParameter: #exportState.
+         "self spawnNewProcessAndTerminateOld: true"!