;
;	File:		IconLDEF.a
;
;	Contains:	A List Manager procedure definition which
;				creates a scrollable list of icons.
;
;	Written by:	Steve Horowitz & Francis Stanbach
;
;	Copyright:	© 1986-1992 by Apple Computer, Inc.  All rights reserved.
;
;	Change History (most recent first):
;
;	   <SM3>	 11/5/92	SWC		Changed PackMacs.a->Packages.a.
;	   <SM2>	 11/3/92	SWC		Replaced INCLUDEs with a LOAD of StandardEqu.d.
;		 <4>	  1/8/91	JDR		(dba) Private icon utilities are now in IconUtilsPriv.a
;		 <3>	 9/25/90	fjs		add icon suite stuff for people who pass ICN#s to the list
;									(Network & Startup Panels)
;		 <2>	 6/22/90	fjs		add support for icon suites and do international truncation
;				 6/21/90	fjs		add icon suite support, and truncstring
; 				20jun86 	sad		preserve txFont, txFace, txSize and txMode
;									_LoadResource if ICON handle seems to have been purged
;									changed a couple lsr's into asr's
;									reorganize to calc rects and truncate text just once per call
;									handle cells w/o strings correctly
;									handle ICONs w/o masks
;  				8jun87		sad		set HiliteMode bit for color text hilighting
;  				7nov89		fjs		looks for Asyms in the Objects Folder
;

	BLANKS  ON
	STRING  ASIS

	LOAD	'StandardEqu.d'

	INCLUDE	'Packages.a'
	include 'IconUtilsPriv.a'


; Cell Format
;cell	RECORD
;cHand	ds.l	1			; Icon Handle
;cFont	ds.w	1			; font number?
;cFace	ds.w	1			; font style in low-order byte
;cSize	ds.w	1			; font size
;cName	ds.b	256			; Str255
;	ENDR

cMin	equ	4				; if cell length ≠ cMin it has text

; Variables

stack	RECORD	{a6link},decr
lsMessage	ds.w 1			; What to do?
filler		ds.b 1
lsSelect	ds.b 1			; boolean
lsRectp		ds.l 1			; ptr to Rectangle
lsCell		ds.l 1			; point
lsDataOffset	ds.w 1		; offset to desired data
lsDataLen	ds.w 1			; data length
lsHandle	ds.l 1			; listHandle
return		ds.l 1
a6link		ds.l 1
fontinfo 	ds.w 4			; font info for text font
lsWidth		ds.w 1			; width of lsRect
iconRect	ds.l 2			; Rect to draw icon in
textRect	ds.l 2			; Rect to draw text in
bitMap		ds.b bitMapRec		; BitMap to draw icon with		
		; --- copy of cell data
text		ds.b 256
textSize	ds.w 1
textFace	ds.w 1
textFont	ds.w 1
iconHndl	ds.l 1
cellCopy	equ	*
localsize	equ	*
	ENDR


; IconLDEF
; d5.w - cell width
; d6.b - true iff there is text in this cell
; a3.l - ptr to copy of text (gets truncated)
; a4.l - Icon Handle


IconLDEF	main		export
			with		stack
			link		a6,#localsize
			movem.l		a3-a4/d3-d6,-(sp)	; preserve registers
			
			cmp.w		#lDrawMsg,lsMessage(a6)	; is it a draw message?
			beq.s		DrawIcon			; if so then draw icon
			cmp.w		#lHiliteMsg,lsMessage(a6) ; is it a hilite message?
			beq.s		DrawIcon			; if so then invert icon state

IconExit	movem.l		(sp)+,a3-a4/d3-d6	; restore registers
			unlk		a6
			move.l		(sp)+,a0
			lea			stack-8(sp),sp
			jmp			(a0)				; Exit

DrawIcon	cmp.w		#lDrawMsg,lsMessage(a6)	; erase the cell if it is
			bne.s		@1						; a draw message
			
			move.l		lsRectp(a6),-(sp)	; push cell rectangle
			_EraseRect						; erase it
@1
			tst.w		lsDataLen(a6)		; is there any data?
			bz.s		IconExit			; if not, leave

; save cell width

			move.l		lsRectp(a6),a0
			move.w		right(a0),d5
			sub.w		left(a0),d5

; copy the cell data into our stack frame (aligning it)

			move.l		lsHandle(a6),a0		; get handle to List
			move.l		(a0),a0				; handle -> ptr
			move.l		cells(a0),a0		; get dataHandle into a0
			move.l		(a0),a0				; handle -> ptr
			add.w		lsDataOffset(a6),a0	; put start of data in a0
			lea			cellCopy(a6),a1		; a1 points to destination
			move.l		#0,d0				; clear high word
			move.w		lsDataLen(a6),d0	; number of bytes to move
			_BlockMove
				
; calculate iconRect and textRect vertical
			
			lea			text(a6),a3			; get ptr to copy of text
			moveq		#32,d4				; vertical size of Icon
	
; is there text?
			
			cmp			#cMin,lsDataLen(a6)
			sne			d6					; true iff there is text
			beq.s		@2					; skip this if no text

; set up text Font, Face, Size and Mode

			move.l		GrafGlobals(a5),a0	; get quickDraw globals ptr
			move.l		thePort(a0),a0		; get thePort
			move.l		txFont(a0),-(sp)	; save txFace, txFont
			move.l		txMode(a0),-(sp)	; save txSize, txMode
			move.l		textFont(a6),-(sp)	; push cell text Face, Font
			_TextFont
			_TextFace
			move.w		#srcOr,-(sp)		; text transfer mode
			_TextMode
			move.w		textSize(a6),-(sp)	; push cell text Size
			_TextSize
			pea			fontinfo(a6)			; push ptr to fontInfo
			_GetFontInfo
			add.w		fontinfo+leading(a6),d4
			add.w		fontinfo+ascent(a6),d4	; add up height of text
			add.w		fontinfo+descent(a6),d4

@2
			move.l		lsRectp(a6),a0		; a0 points to Rect
			move.w		bottom(a0),d1		; calculates height of Rect
			sub.w		top(a0),d1			; rect height in d0
			sub.w		d4,d1				; subtract icon height from rect
			asr.w		#1,d1				; divide d0 by 2
			add.w		top(a0),d1			; add original top
			move.w		d1,iconRect+top(a6)	; assign rectTop
			add.w		#32,d1
			move.w		d1,iconRect+bottom(a6)	; assign rectBottom

; calculate icon Rect width

			move.w		d5,d0				; get cell width
			sub.w		#32,d0				; subtract icon width
			asr.w		#1,d0				; divide d1 by 2
			add.w		left(a0),d0			; add original left
			move.w		d0,iconRect+left(a6)	; assign rectLeft
			add.w		#32,d0
			move.w		d0,iconRect+right(a6)	; assign rectRight
			tst.b		d6					; is there text?
			bz.s		@6					; no, skip
		
			move.w		d1,textRect+top(a6)
			add.w		fontinfo+leading(a6),d1
			add.w		fontinfo+ascent(a6),d1	; add text height
			add.w		fontinfo+descent(a6),d1
			move.w		d1,textRect+bottom(a6)	; setup bottom of text rect

; truncate text

			move.w		d5,d4				; get cell width
			sub.w		#2,d4				; don’t let text touch sides of cell
			moveq		#0,d3				; clear d3
			move.b		(a3),d3				; get length of string
			add.b		#1,d3				; initial conditions
			sub.l		#2,sp				; room for result of _StringWidths

@3
			move.l		a3,-(sp)			; push string
			_StringWidth
			cmp.w		(sp),d4				; is string too long? (no pop!)
			bgt.s		@4					; no, continue

; if the string is too long then truncate it

			subq		#2,sp				; returns whether string truncated
			move.w		d4,-(sp)			; width
			move.l		a3,-(sp)			; StringPtr
			move.w		#smTruncMiddle,-(sp) ; truncate in the middle
			_TruncString
			
			addq		#2,sp				; ignore result
	
			move.l		a3,-(sp)			; push string
			_StringWidth
	
@4
			move.w		(sp)+,d3			; pop string width into d3

; calculate textRect left and right
	
			move.w		d5,d0				; get cell width
			sub.w		d3,d0				; subtract text width
			asr.w		#1,d0				; divide d0 by 2
			move.l		lsRectp(a6),a0		; a0 points to listRect
			add.w		left(a0),d0			; add original left
			move.w		d0,textRect+left(a6)	; setup left of text rect
			add.w		d0,d3				; setup right of text rect
			add.w		#1,d3
			move.w		d3,textRect+right(a6)

@6

; set up bitmap for _CopyBits
	
			move.l		#0,bitmap+bounds+topLeft(a6)	; (0,0)
			move.l		#$00200020,bitmap+bounds+botRight(a6)	; (32,32)
			move.w		#4,bitmap+rowBytes(a6)	; set up rowBytes field
			move.l		iconHndl(a6),a4			; get icon handle
			
; check to see if this is an icon suite

			move.l		a4,a0
			_GetHandleSize
			cmp			#128,d0				; if it less than 64, it is an icon suite
			blt			DoSuite
			
; ••• start

			subq		#4,sp				; make space for suite handle
			move.l		sp,a0				; pointer to space in a0
			
			tst.l		(a4)				; is it purged?
			bnz.s		@5
		
			move.l		a4,-(sp)
			_LoadResource					; preserves all regs


; create the suite

@5			subq		#2,sp				; make room for error
			move.l		a0,-(sp)			; place for suite
			_NewIconSuite					; create a suite
			move.w		(sp)+,d0			; error in d0
			move.l		(sp)+,a0			; suite in a0
			bnz.s		@error				; IconExit
			
; add the icon

			subq		#2,sp				; room for error
			move.l		a4,-(sp)			; push the icon
			move.l		a0,-(sp)			; push the suite
			move.l		#'ICN#',-(sp)		; its a B & W Icon
			
			move.l		a0,a4				; save the suite before the trap is called

			_AddIconToSuite
			move.w		(sp)+,d0			; ignore error 
			
			bsr			SDrawIt				; draw the suite
			
; dispose the suite			
			
			subq		#2,sp				; room for result
			move.l		a4,-(sp)			; icon suite
			move.b		#0,-(sp)			; do not kill ICN#
			_DisposeIconSuite
			addq		#2,sp				; ignore
			
@error		bra			AfterSDrawit		; jump back in


InvertText
			tst.b		d6					; is there text?
			bz			IconExit			; no, split
		
			bclr		#7,HiliteMode		; now in color! <8Jun87 sad>
			pea			textRect(a6)		; push enclosing rectangle
			_InverRect						; invert text

TextExit

; restore text Mode, Size, Font and Face and leave
			
			_TextMode
			_TextSize
			_TextFont
			_TextFace
			bra			IconExit


; draw the text if it exists

DrawTheText
			tst.b		d6					; is there text?
			bz.s		@1					; no
		
			move.w		textRect+left(a6),d0
			add.w		#1,d0				; don’t touch left side of textRect
			move.w		d0,-(sp)			; horiz
			move.w		textRect+top(a6),d0
			add.w		fontinfo+leading(a6),d0
			add.w		fontinfo+ascent(a6),d0
			move.w		d0,-(sp)			; vert
			_MoveTo
			move.l		a3,-(sp)			; push ptr to string
			_DrawString						; draw it
@1			
			rts
			
;------------------------------

DoSuite
			
			move.l		a4,d0					; is it there?
			bz			IconExit
		
			bsr.s		SDrawIt				; always draw the icon

AfterSDrawIt

			cmp.w		#lDrawMsg,lsMessage(a6) ; is it a draw message?
			bne			InvertText			; no, its a hilite message
			
SDoDrawMsg

			bsr.s		DrawTheText

			tst.b		lsSelect(a6)		; is it selected?
			bnz			InvertText			; yes
		
			tst.b		d6					; is there text?
			bz			IconExit			; no, split
			bra			TextExit			; else, split with fonts
	
SDrawIt

; draw the icon with the proper transform

			move.w		#ttNone,d0			; assume no transform
			tst.b		lsSelect(a6)		; is it selected?
			bz.s		@plotSuite
			move.w		#ttSelected,d0		; use selected transform
			
@plotSuite
			subq		#2,sp				; return error
			pea 		iconRect(a6)		; push the rect
			move.w		#0,-(sp)			; no alignment
			move.w		d0,-(sp)			; transform
			move.l		a4,-(sp)			; push the suite
			_PlotIconSuite					; thanks DC
			move.w		(sp)+,d0			; get and ignore the error
			
			rts

			endwith
			
			end