Marcel Taeumel uploaded a new version of Morphic to project The Trunk:
http://source.squeak.org/trunk/Morphic-mt.900.mcz

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

Name: Morphic-mt.900
Author: mt
Time: 19 April 2015, 11:27:22.653 am
UUID: 950b4378-f3fe-db4c-b054-88b646a1feb0
Ancestors: Morphic-mt.899

Fix to avoid unnecessary layout computation for proportional layout.

Note: Please report any visual glitches. Not 100% sure about the extent of this change...

=============== Diff against Morphic-mt.899 ===============

Item was changed:
  ----- Method: Morph>>layoutProportionallyIn: (in category 'layout') -----
  layoutProportionallyIn: newBounds
  	"Layout specific. Apply the given bounds to the receiver."
  	| box frame |
  	frame := self layoutFrame ifNil:[^self].
- 	"before applying the proportional values make sure the receiver's layout is computed"
- 	self fullBounds. "sigh..."
  	"compute the cell size the receiver has given its layout frame"
  	box := frame layout: self bounds in: newBounds.
  	(box = self bounds) ifTrue:[^self]. "no change"
  	^self layoutInBounds: box.!

Item was added:
+ ----- Method: PluggableTextMorph>>isAutoFit (in category 'accessing') -----
+ isAutoFit
+ 
+ 	^ textMorph isAutoFit!

Item was added:
+ ----- Method: ScrollPane>>isAutoFit (in category 'access') -----
+ isAutoFit
+ 	"Does this scroll pane modifies the extent of its scrollable content when it resizes itself to avoid, for example, a horizontal or vertical scrollbar?"
+ 
+ 	^ false!

Item was added:
+ ----- Method: ScrollPane>>layoutProportionallyIn: (in category 'layout') -----
+ layoutProportionallyIn: newBounds
+ 
+ 	self layoutFrame ifNil:[^self].
+ 	self isAutoFit ifTrue: [self fullBounds].
+ 	^ super layoutProportionallyIn: newBounds.!