More work. I can't figure out where these phantom constraints come from.

darwin/autolayout.m

@@ -105,3 +105,81 @@ void singleChildConstraintsSetMargined(struct singleChildConstraints *c, int mar
 	if (c->bottomConstraint != nil)
 		[c->bottomConstraint setConstant:margin];
 }
+
+// from https://developer.apple.com/library/mac/documentation/UserExperience/Conceptual/AutolayoutPG/WorkingwithScrollViews.html#//apple_ref/doc/uid/TP40010853-CH24-SW1
+// note: if the xcode-specific label is set to Content View, the view actually becomes the *document* view
+// TODO are these instructions wrong? if we have the bottom we can't scroll vertically, and if we have spacing we can't scroll regardless
+void scrollViewConstraintsEstablish(struct scrollViewConstraints *c, NSScrollView *sv, NSString *desc)
+{
+	NSView *cv, *dv;
+
+	scrollViewConstraintsRemove(c, sv);
+	cv = [sv contentView];
+	dv = [sv documentView];
+
+	c->documentLeading = mkConstraint(dv, NSLayoutAttributeLeading,
+		NSLayoutRelationEqual,
+		sv, NSLayoutAttributeLeading,
+		1, 0,
+		[desc stringByAppendingString:@"document leading constraint"]);
+	[sv addConstraint:c->documentLeading];
+	[c->documentLeading retain];
+
+	c->documentTop = mkConstraint(dv, NSLayoutAttributeTop,
+		NSLayoutRelationEqual,
+		sv, NSLayoutAttributeTop,
+		1, 0,
+		[desc stringByAppendingString:@"document top constraint"]);
+	[sv addConstraint:c->documentTop];
+	[c->documentTop retain];
+
+	c->documentTrailing = mkConstraint(dv, NSLayoutAttributeTrailing,
+		NSLayoutRelationEqual,
+		sv, NSLayoutAttributeTrailing,
+		1, 0,
+		[desc stringByAppendingString:@"document trailing constraint"]);
+	[sv addConstraint:c->documentTrailing];
+	[c->documentTrailing retain];
+
+	c->documentBottom = mkConstraint(dv, NSLayoutAttributeBottom,
+		NSLayoutRelationEqual,
+		sv, NSLayoutAttributeBottom,
+		1, 0,
+		[desc stringByAppendingString:@"document bottom constraint"]);
+	[sv addConstraint:c->documentBottom];
+	[c->documentBottom retain];
+}
+
+void scrollViewConstraintsRemove(struct scrollViewConstraints *c, NSScrollView *sv)
+{
+	if (c->documentLeading != nil) {
+		[sv removeConstraint:c->documentLeading];
+		[c->documentLeading release];
+		c->documentLeading = nil;
+	}
+	if (c->documentTop != nil) {
+		[sv removeConstraint:c->documentTop];
+		[c->documentTop release];
+		c->documentTop = nil;
+	}
+	if (c->documentTrailing != nil) {
+		[sv removeConstraint:c->documentTrailing];
+		[c->documentTrailing release];
+		c->documentTrailing = nil;
+	}
+	if (c->documentBottom != nil) {
+		[sv removeConstraint:c->documentBottom];
+		[c->documentBottom release];
+		c->documentBottom = nil;
+	}
+	if (c->documentWidth != nil) {
+		[sv removeConstraint:c->documentWidth];
+		[c->documentWidth release];
+		c->documentWidth = nil;
+	}
+	if (c->documentHeight != nil) {
+		[sv removeConstraint:c->documentHeight];
+		[c->documentHeight release];
+		c->documentHeight = nil;
+	}
+}

darwin/multilineentry.m

@@ -7,10 +7,12 @@ struct uiMultilineEntry {
 	NSTextView *tv;
 	void (*onChanged)(uiMultilineEntry *, void *);
 	void *onChangedData;
+	struct scrollViewConstraints constraints;
 };
 
 // TODO events
 
+// TODO destroy
 uiDarwinControlAllDefaults(uiMultilineEntry, sv)
 
 static void defaultOnChanged(uiMultilineEntry *e, void *data)
@@ -119,11 +121,9 @@ uiMultilineEntry *uiNewMultilineEntry(void)
 	// let's just set it to the standard control font anyway, just to be safe
 	[e->tv setFont:font];
 
-//TODO	[e->tv setTranslatesAutoresizingMaskIntoConstraints:NO];
 	[e->sv setDocumentView:e->tv];
 	[e->tv setTranslatesAutoresizingMaskIntoConstraints:NO];
-	// we don't need to save the NSMutableArray
+	scrollViewConstraintsEstablish(&(e->constraints), e->sv, @"uiMultilineEntry");
-//TODO	[layoutScrollViewContents(e->sv, YES, NO, @"uiMultilineEntry") release];
 
 //TODO:void printinfo(NSScrollView *sv, NSTextView *tv);
 //printinfo(e->sv, e->tv);

darwin/uipriv_darwin.h

@@ -66,6 +66,16 @@ struct singleChildConstraints {
 extern void singleChildConstraintsEstablish(struct singleChildConstraints *c, NSView *contentView, NSView *childView, BOOL hugsTrailing, BOOL hugsBottom, int margined, NSString *desc);
 extern void singleChildConstraintsRemove(struct singleChildConstraints *c, NSView *cv);
 extern void singleChildConstraintsSetMargined(struct singleChildConstraints *c, int margined);
+struct scrollViewConstraints {
+	NSLayoutConstraint *documentLeading;
+	NSLayoutConstraint *documentTop;
+	NSLayoutConstraint *documentTrailing;
+	NSLayoutConstraint *documentBottom;
+	NSLayoutConstraint *documentWidth;
+	NSLayoutConstraint *documentHeight;
+};
+extern void scrollViewConstraintsEstablish(struct scrollViewConstraints *c, NSScrollView *sv, NSString *desc);
+extern void scrollViewConstraintsRemove(struct scrollViewConstraints *c, NSScrollView *sv);
 
 // map.m
 extern struct mapTable *newMap(void);