A2osX/BIN/EDIT.S.BUF.txt

NEW
  AUTO 3,1
				.LIST OFF
*--------------------------------------
BUF.InsertClipboard
				>LDA.G hClipBoard
				beq .8

				>SYSCALL GetMemPtr
				>STYA ClipboardPtr
				jsr BUF.ComputeCOffset

				lda FileLen
				sec
				ldy #ClipboardLen
				adc (pData),y
				pha
				lda FileLen+1
				iny
				adc (pData),y
				ply
				jsr BUF.GetNewYA
				bcs .9

				>LDYA BUF.COffset
				jsr BUF.Start2YA

				jsr BUF.CopyClipboard
				jsr BUF.CopyTail

				>LDA.G ClipboardLen
				clc
				adc FileLen
				sta FileLen

				iny
				lda (pData),y
				adc FileLen+1
				sta FileLen+1
		
.8				clc	
.9				rts
*--------------------------------------
BUF.InsertTAB	jsr BUF.ComputeCOffset
				cpy #256-TABLEN
				beq .8
				
				lda FileLen
				sec
				adc #TABLEN
				tay
				lda FileLen+1
				adc #0
				
				jsr BUF.GetNewYA
				bcs .9

				>LDYA BUF.COffset
				jsr BUF.Start2YA

				ldy #TABLEN
				lda #C.SPACE
				
.1				sta (BufPtr)
				inc BufPtr
				bne .2
				inc BufPtr+1

.2				dey
				bne .1
				
.3				jsr BUF.CopyTail

.4				lda FileLen
				clc
				adc #TABLEN
				sta FileLen
				bcc .8

				inc FileLen+1

.8				clc	
.9				rts				
*--------------------------------------
BUF.InsertA		sta TmpByte
				jsr BUF.ComputeCOffset
				cpy #255
				beq .8

				lda FileLen
				clc
				adc #2
				tay
				lda FileLen+1
				adc #0
				
				jsr BUF.GetNewYA
				bcs .9

				>LDYA BUF.COffset
				jsr BUF.Start2YA

.2				lda TmpByte
				sta (BufPtr)
				inc BufPtr
				bne .3
				inc BufPtr+1

.3				jsr BUF.CopyTail

.4				inc FileLen
				bne .8
				inc FileLen+1

.8				clc	
.9				rts
*--------------------------------------
BUF.DelSel		jsr BUF.GetSelLen
				bcs .8

				lda FileLen
				sec
				sbc SelLen
				tay
				lda FileLen+1
				sbc SelLen+1
				iny
				bne .1
				inc

.1				jsr BUF.GetNewYA
				bcs .9
			
				>LDYA.G SelStart
				jsr BUF.Start2YA
				lda BufPtrBackup
				clc
				adc SelLen
				sta BufPtrBackup
				lda BufPtrBackup+1
				adc SelLen+1
				sta BufPtrBackup+1
				jsr BUF.CopyTail

				lda FileLen
				sec
				sbc SelLen
				sta FileLen
				lda FileLen+1
				sbc SelLen+1
				sta FileLen+1

				jsr BUF.ResetSel
.8				clc
.9				rts
*--------------------------------------
* Erase char at CurXY
*--------------------------------------
BUF.DelCharAtCursor
				>LDYA FileLen
				jsr BUF.GetNewYA		BufferLen-1
				bcs .9

				>LDYA BUF.COffset
				jsr BUF.Start2YA

.3				lda (BufPtrBackup)
				pha						Save deleted char for later

				inc BufPtrBackup
				bne .4
				inc BufPtrBackup+1

.4				jsr BUF.CopyTail

				lda FileLen
				bne .5
				dec FileLen+1
.5				dec FileLen	

				jsr BUF.ResetSel
				pla						Get back deleted char

				clc
.9				rts
*--------------------------------------
BUF.SelToClipboard
				jsr BUF.GetSelLen
				bcs .8

				>LDA.G hClipBoard
				beq .1

				>SYSCALL FreeMem
				>STZ.G hClipBoard

.1				>LDYA SelLen
				>SYSCALL GetMem
				bcs .9

				>STYA ClipboardPtr
				txa
				>STA.G hClipBoard

				>LDA.G hBuffer
				>SYSCALL GetMemPtr

				pha
				tya

				>ADC.G SelStart
				sta BufPtr

				pla
				iny						SelStart+1
				adc (pData),y 
				sta BufPtr+1

				lda SelLen
				>STA.G ClipBoardLen

				eor #$ff
				tax
				iny
				lda SelLen+1
				sta (pData),y
				eor #$ff
				pha

				ldy #0

.2				inx
				bne .3

				pla
				inc
				beq .8

				pha

.3				lda (BufPtr),y
				sta	(ClipboardPtr),y
				iny
				bne .2

				inc BufPtr+1
				inc ClipboardPtr+1
				bra .2

.8				clc
.9				rts
*--------------------------------------
BUF.CopyClipboard
				>LDA.G ClipboardLen
				eor #$ff
				tax
				iny
				lda (pData),y
				eor #$ff
				pha
				
				ldy #0

.1				inx
				bne .2

				pla
				inc
				beq .3

				pha

.2				lda (ClipboardPtr),y
				sta	(BufPtr),y
				iny
				bne .1

				inc ClipboardPtr+1
				inc BufPtr+1
				bra .1

.3				tya
				clc
				adc ClipboardPtr
				sta ClipboardPtr
				bcc BUF.CopyAddY
				inc ClipboardPtr+1

BUF.CopyAddY	tya
				clc
				adc BufPtr
				sta BufPtr
				bcc .2
				inc BufPtr+1
.2				rts
*--------------------------------------
BUF.Start2YA	eor #$ff
				pha
				tya
				eor #$ff
				tax

				ldy #0

.1				inx
				bne .2
				pla
				inc
				beq .3

				pha

.2				lda (BufPtrBackup),y
				sta	(BufPtr),y
				iny
				bne .1

				inc BufPtrBackup+1
				inc BufPtr+1
				bra .1

.3				tya
				clc
				adc BufPtrBackup
				sta BufPtrBackup
				bcc BUF.CopyAddY
				inc BufPtrBackup+1
				bra BUF.CopyAddY
*--------------------------------------
BUF.CopyTail	ldy #0

.1				lda (BufPtrBackup),y
				sta	(BufPtr),y
				beq .8

				iny
				bne .1

				inc BufPtrBackup+1
				inc BufPtr+1
				bra .1

.8				rts
*--------------------------------------
* Out : Y = Line Length
*--------------------------------------
BUF.ComputeCOffset
				jsr BUF.GetLine
				bcs .9

				phy						save line length

				>LDA.G FileX
				clc
				adc BUF.LOffset
				sta BUF.COffset

				lda #0
				adc BUF.LOffset+1
				sta BUF.COffset+1

				ply

				clc
.9				rts
*--------------------------------------
BUF.GetNextLine	sec
				.HS 90					BCC

BUF.GetLine		clc
				>LDA.G FileY
				adc #0
				pha
				iny
				lda (pData),y
				adc #0
				tax
				pla

BUF.GetLineAX	sta BUF.TmpLine1
				stx BUF.TmpLine1+1

				stz	BUF.LOffset
				stz	BUF.LOffset+1

				>LDA.G hBuffer
				>SYSCALL GetMemPtr
				>STYA BufPtr

				stz BUF.TmpLine2
				stz BUF.TmpLine2+1
		
.1				ldy #0

.2				lda (BufPtr),y
				beq .7

				cmp #C.CR
				beq .3
				iny
				bne .2

.3				lda BUF.TmpLine1
				cmp BUF.TmpLine2
				bne .4

				lda BUF.TmpLine1+1
				cmp BUF.TmpLine2+1
				beq .8

.4				tya
				sec
				adc BufPtr
				sta BufPtr
				bcc .5
				inc BufPtr+1

.5				tya
				sec
				adc BUF.LOffset
				sta BUF.LOffset
				bcc .6
				inc BUF.LOffset+1

.6				inc BUF.TmpLine2
				bne .1
				inc BUF.TmpLine2+1
				bra .1

.7				lda BUF.TmpLine1
				cmp BUF.TmpLine2
				bne .9

				lda BUF.TmpLine1+1
				cmp BUF.TmpLine2+1
				bne .9

.8				clc						Y = Line length
				rts

.9				sec
				rts
*--------------------------------------
BUF.GetNewYA	tax						In 256 bytes page to avoid fragmentation

				tya
				beq .10
				inx

.10				phx

				>LDA.G hBufferBackup
				beq .1

				>SYSCALL FreeMem

.1				>LDA.G hBuffer
				>STA.G hBufferBackup

				>SYSCALL GetMemPtr
				>STYA BufPtrBackup

				>STZ.G hBuffer

				pla
				ldy #0
				
				>SYSCALL GetMem
				bcs	.9
				>STYA BufPtr
				txa
				>STA.G hBuffer

				>LDA.G bSaved
				beq .8

				lda #0
				sta (pData),y
				
				jsr SCRN.UpdateTopBar
				bcs .9
.8
*				clc
.9				rts
*--------------------------------------
BUF.ResetSel	lda #$ff
				ldy #SelStart

				sta (pData),y
				iny
				sta (pData),y

				iny						#SelEnd
				inc						lda #0
				sta (pData),y
				iny
				sta (pData),y
				rts
*--------------------------------------
BUF.CheckSelected
				lda BUF.COffset
				ldy #SelStart
				cmp (pData),y
				lda BUF.COffset+1
				iny
				sbc (pData),y
				bcc .9					CC:COffset < SelStart

				iny						#SelEnd
				lda (pData),y
				clc
				sbc BUF.COffset
				iny
				lda (pData),y
				sbc BUF.COffset+1
*										CC:SelEnd < COffset 			
.9				lda #0
				ror						$80 = selected
				rts
*--------------------------------------
BUF.GetSelLen	ldy #SelEnd
				lda (pData),y
				sec
				ldy #SelStart
				sbc (pData),y
			
				sta SelLen
				tax
				ldy #SelEnd+1
				lda (pData),y

				ldy #SelStart+1
				sbc (pData),y
				sta SelLen+1
				bcc .9
				bne .8
				txa
				beq .9
.8				clc
				rts
.9				sec
				rts
*--------------------------------------
MAN
SAVE USR/SRC/BIN/EDIT.S.BUF
LOAD USR/SRC/BIN/EDIT.S
ASM