Added parens matching back

src/left.tal

@@ -14,6 +14,7 @@
 	@textarea &highlight $1 &length $2
 	@scroll &x $2 &y $2 &addr $2 &ratio $2
 	@scrollbar &height $2
+	@wrap &left $2 &right $2
 	@state &comment $1 &underline $1 &label $1 &mono $1 &rune $1
 	@nav &cat $1 &len $1 &buf $60
 
@@ -60,7 +61,7 @@
 	( name ) "Left 0a
 	( details ) "A 20 "Text 20 "Editor 0a
 	( author ) "By 20 "Hundred 20 "Rabbits 0a
-	( date ) "21 20 "Mar 20 "2024 $1
+	( date ) "14 20 "Apr 20 "2024 $1
 	01
 	( > ) 83 =appicon
 
@@ -517,7 +518,7 @@
 	( >> )
 
 @selection-changed ( -- )
-	scroll-follow update-nav !reqdraw-textarea
+	scroll-follow update-wrap update-nav !reqdraw-textarea
 
 @get-from ( -- addr* )
 	.selection/b LDZ2 .selection/a LDZ2 LTH2k ?{ SWP2 }
@@ -784,6 +785,37 @@
 		next-glyph & GTH2k ?&>l
 	POP2 POP2 STH2r JMP2r
 
+@balance-wrap ( c -- offset )
+	DUP LIT "( EQU ?&a
+	DUP LIT "[ EQU ?&a
+	DUP LIT "{ EQU ?&a
+	DUP LIT ") EQU ?&b
+	DUP LIT "] EQU ?&b
+	DUP LIT "} EQU ?&b
+	POP #00 JMP2r
+	&a POP #ff JMP2r
+	&b POP #01 JMP2r
+
+@update-wrap ( -- )
+	#0000 .wrap/left STZ2k INC INC STZ2
+	.selection/b LDZ2
+	( | left )
+	[ LITr 01 ] .scroll/addr LDZ2 ;text ADD2 #0001 SUB2 OVR2 #0001 SUB2 EQU2k ?{
+		&l ( -- )
+		LDAk balance-wrap STH
+		ADDr STHkr ?{ .wrap/left STZ2
+			!&end-l }
+		prev-glyph LTH2k ?&l }
+	POP2 &end-l POP2 POPr
+	( | right )
+	[ LITr 01 ] get-eof SWP2 EQU2k ?{
+		&r ( -- )
+		LDAk balance-wrap STH
+		SUBr STHkr ?{ .wrap/right STZ2
+			!&end-r }
+		next-glyph GTH2k ?&r }
+	POP2 &end-r POP2 POPr JMP2r
+
 @clamp-addr ( addr* -- addr* )
 	( min ) ;text GTH2k ?{ SWP2 }
 	POP2
@@ -853,7 +885,10 @@
 @get-color ( addr* -- addr* color )
 	DUP2 get-from LTH2 ?&no-selected
 	DUP2 get-to LTH2 ?&selected
-	&no-selected .textarea/highlight LDZ ?&skip
+	&no-selected ( -- )
+	DUP2 .wrap/left LDZ2 EQU2 ?&wrap
+	DUP2 .wrap/right LDZ2 EQU2 ?&wrap
+	.textarea/highlight LDZ ?&skip
 	.state/comment LDZ ?&comment
 	.state/label LDZ ?&label
 	&skip #01 JMP2r
@@ -861,6 +896,7 @@
 	#0d JMP2r
 	&label #02 JMP2r
 	&comment #03 JMP2r
+	&wrap #0d JMP2r
 
 @get-high-width ( addr* -- addr* width* )
 	LDA2k #c2b7 NEQ2 ?{ #0006 JMP2r }

untitled.txt

@@ -2,6 +2,12 @@
 
 a very long line that doesn't quite display on a single screen to test the scroll-x behaviour.
 
+<> (reverse List (  ) ?* ) (?*)
+<> (reverse (?*)) (reverse List (?*) ())
+<> (reverse List (?x ?y) ?z) (reverse List ?y (?x ?z))
+
+(reverse (modal))
+
 @delete ( -- )
 	[ LIT2 &name $2 ]
 	[ LIT &field -default ]