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a2d/desk.acc/show_text_file.s

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.setcpu "6502"
.include "apple2.inc"
.include "../inc/ascii.inc"
.include "../inc/prodos.inc"
.include "../inc/auxmem.inc"
.include "../a2d.inc"
.include "../desktop.inc" ; get/clear selection, font
.org $800
start: jmp copy2aux
save_stack:.byte 0
;;; Copy $800 through $13FF (the DA) to aux
.proc copy2aux
tsx
stx save_stack
sta RAMWRTON
ldy #0
src: lda start,y ; self-modified
dst: sta start,y ; self-modified
dey
bne src
sta RAMWRTOFF
inc src+2
inc dst+2
sta RAMWRTON
lda dst+2
cmp #$14
bne src
.endproc
call_main_trampoline := $20 ; installed on ZP, turns off auxmem and calls...
call_main_addr := call_main_trampoline+7 ; address patched in here
;;; Copy the following "call_main_template" routine to $20
.scope
sta RAMWRTON
sta RAMRDON
ldx #sizeof_call_main_template
loop: lda call_main_template,x
sta call_main_trampoline,x
dex
bpl loop
jmp call_init
.endscope
.proc call_main_template
sta RAMRDOFF
sta RAMWRTOFF
jsr $1000 ; overwritten (in zp version)
sta RAMRDON
sta RAMWRTON
rts
.endproc
sizeof_call_main_template := * - call_main_template
.proc call_init
;; run the DA
jsr init
;; tear down/exit
sta ALTZPON
lda LCBANK1
lda LCBANK1
sta RAMRDOFF
sta RAMWRTOFF
ldx save_stack
txs
rts
.endproc
;;; ==================================================
;;; ProDOS MLI calls
.proc open_file
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL OPEN, open_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
.proc read_file
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL READ, read_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
.proc get_file_eof
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL GET_EOF, get_eof_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
.proc set_file_mark
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL SET_MARK, set_mark_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
.proc close_file
jsr copy_params_aux_to_main
sta ALTZPOFF
MLI_CALL CLOSE, close_params
sta ALTZPON
jsr copy_params_main_to_aux
rts
.endproc
;;; ==================================================
;;; Copies param blocks from Aux to Main
.proc copy_params_aux_to_main
ldy #(params_end - params_start + 1)
sta RAMWRTOFF
loop: lda params_start - 1,y
sta params_start - 1,y
dey
bne loop
sta RAMRDOFF
rts
.endproc
;;; Copies param blocks from Main to Aux
.proc copy_params_main_to_aux
pha
php
sta RAMWRTON
ldy #(params_end - params_start + 1)
loop: lda params_start - 1,y
sta params_start - 1,y
dey
bne loop
sta RAMRDON
plp
pla
rts
.endproc
;;; ----------------------------------------
params_start:
;;; This block gets copied between main/aux
;;; ProDOS MLI param blocks
.proc open_params
.byte 3 ; param_count
.addr pathname ; pathname
.addr $0C00 ; io_buffer
ref_num:.byte 0 ; ref_num
.endproc
default_buffer := $1200
.proc read_params
.byte 4 ; param_count
ref_num:.byte 0 ; ref_num
buffer: .addr default_buffer ; data_buffer
.word $100 ; request_count
.word 0 ; trans_count
.endproc
.proc get_eof_params
.byte 2 ; param_count
ref_num:.byte 0 ; ref_num
.byte 0,0,0 ; EOF (lo, mid, hi)
.endproc
.proc set_mark_params
.byte 2 ; param_count
ref_num:.byte 0 ; ref_num
.faraddr 0 ; position (lo, mid, hi)
.endproc
.proc close_params
.byte 1 ; param_count
ref_num:.byte 0 ; ref_num
.endproc
.proc pathname ; 1st byte is length, rest is full path
length: .byte $00
data: .res 64, $00
.endproc
L0945: .byte $00
L0946: .byte $00
L0947: .byte $00
L0948: .byte $00
L0949: .byte $00
params_end := * + 4 ; bug in original? (harmless as this is static)
;;; ----------------------------------------
black_pattern:
.res 8, $00
white_pattern:
.res $8, $FF
window_id := 100
L095A: .byte $00
L095B: .byte $FA
L095C: .byte $01
.proc line_pos
left: .word 0
base: .word 0
.endproc
window_width: .word 0
window_height: .word 0
L0965: .byte $00
L0966: .byte $00,$00
L0968: .byte $00
L0969: .byte $00
L096A: .byte $00
L096B: .byte $00
L096C: .byte $00
L096D: .byte $00
track_scroll_delta:
.byte $00
fixed_mode_flag:
.byte $00 ; 0 = proportional, otherwise = fixed
.proc input_params
state: .byte 0
coords: ; spills into target query
xcoord: .word 0
ycoord: .word 0
.endproc
.proc target_params
elem: .byte 0
win: .byte 0
.endproc
.proc resize_drag_params
id: .byte window_id
xcoord: .word 0
ycoord: .word 0
.byte 0 ; ???
.endproc
.proc close_btn_params ; queried after close clicked to see if aborted/finished
state: .byte 0 ; 0 = aborted, 1 = clicked
.byte 0,0 ; ???
.endproc
.proc query_client_params ; queried after a client click to identify target
xcoord: .word 0
ycoord: .word 0
part: .byte 0 ; 0 = client, 1 = vscroll, 2 = hscroll
scroll: .byte 0 ; 1 = up, 2 = down, 3 = above, 4 = below, 5 = thumb
.endproc
;; param block used in dead code (resize?)
.proc resize_window_params
part: .byte 0
L0987: .byte 0
;; needs one more byte?
.endproc
.proc update_scroll_params ; called to update scroll bar position
type: .byte 0 ; 1 = vscroll, 2 = hscroll
pos: .byte 0 ; new position
.endproc
;;; Used when dragging vscroll thumb
.proc thumb_drag_params
type: .byte 0 ; 1 = vscroll, 2 = hscroll
xcoord: .word 0
ycoord: .word 0
pos: .byte 0 ; position
moved: .byte 0 ; 0 if not moved, 1 if moved
.endproc
.proc text_string
addr: .addr 0 ; address
len: .byte 0 ; length
.endproc
default_width := 512
default_height := 150
default_left := 10
default_top := 28
.proc window_params
id: .byte window_id ; window identifier
flags: .byte A2D_CWF_ADDCLOSE; window flags (2=include close box)
title: .addr $1000 ; overwritten to point at filename
hscroll:.byte A2D_CWS_NOSCROLL
vscroll:.byte A2D_CWS_SCROLL_NORMAL
hsmax: .byte 32
hspos: .byte 0
vsmax: .byte 255
vspos: .byte 0
.byte 0, 0 ; ???
w1: .word 200
h1: .word 51
w2: .word default_width
h2: .word default_height
.proc box
left: .word default_left
top: .word default_top
addr: .addr A2D_SCREEN_ADDR
stride: .word A2D_SCREEN_STRIDE
hoff: .word 0 ; Also used for A2D_FILL_RECT
voff: .word 0
width: .word default_width
height: .word default_height
.endproc
pattern:.res 8, $00
mskand: .byte A2D_DEFAULT_MSKAND
mskor: .byte A2D_DEFAULT_MSKOR
xpos: .word 0
ypos: .word 0
hthick: .byte 1
vthick: .byte 1
mode: .byte 0
tmask: .byte $7F
font: .addr DEFAULT_FONT
next: .addr 0
.endproc
;; gets copied over window_params::box after mode is drawn
.proc default_box
left: .word default_left
top: .word default_top
addr: .word A2D_SCREEN_ADDR
stride: .word A2D_SCREEN_STRIDE
hoff: .word 0
voff: .word 0
width: .word default_width
height: .word default_height
.endproc
.proc init
sta ALTZPON
lda LCBANK1
lda LCBANK1
;; Get filename by checking DeskTop selected window/icon
;; Check that an icon is selected
lda #0
sta pathname::length
lda file_selected
beq abort ; some file properties?
lda path_index ; prefix index in table
bne :+
abort: rts
;; Copy path (prefix) into pathname buffer.
: src := $06
dst := $08
asl a ; (since address table is 2 bytes wide)
tax
lda path_table,x ; pathname ???
sta src
lda path_table+1,x
sta src+1
ldy #0
lda (src),y
tax
inc src
bne :+
inc src+1
: lda #<(pathname::data)
sta dst
lda #>(pathname::data)
sta dst+1
jsr copy_pathname ; copy x bytes (src) to (dst)
;; Append separator.
lda #'/'
ldy #0
sta (dst),y
inc pathname::length
inc dst
bne :+
inc dst+1
;; Get file entry.
: lda file_index ; file index in table
asl a ; (since table is 2 bytes wide)
tax
lda file_table,x
sta src
lda file_table+1,x
sta src+1
;; Exit if a directory.
ldy #2 ; 2nd byte of entry
lda (src),y
and #$70 ; check that one of bits 4,5,6 is set ???
;; some vague patterns, but unclear
;; basic = $32,$33, text = $52, sys = $11,$14,??, bin = $23,$24,$33
;; dir = $01 (so not shown)
bne :+
rts ; abort ???
;; Set window title to point at filename (9th byte of entry)
;; (title includes the spaces before/after from the icon)
: clc
lda src ; name is 9 bytes into entry
adc #9
sta window_params::title
lda src+1
adc #0
sta window_params::title+1
;; Append filename to path.
ldy #9
lda (src),y ; grab length
tax ; name has spaces before/after
dex ; so subtract 2 to get actual length
dex
clc
lda src
adc #11 ; 9 = length, 10 = space, 11 = name
sta src
bcc :+
inc src+1
: jsr copy_pathname ; copy x bytes (src) to (dst)
;; Clear selection (why???)
lda #<JUMP_TABLE_CLEAR_SEL
sta call_main_addr
lda #>JUMP_TABLE_CLEAR_SEL
sta call_main_addr+1
jsr call_main_trampoline
jmp open_file_and_init_window
.proc copy_pathname ; copy x bytes from src to dst
ldy #0 ; incrementing path length and dst
loop: lda (src),y
sta (dst),y
iny
inc pathname::length
dex
bne loop
tya
clc
adc dst
sta dst
bcc end
inc dst+1
end: rts
.endproc
.endproc
font_width_backup := $1100
.proc open_file_and_init_window
lda #0
sta fixed_mode_flag
;; make backup of font width table; overwritten if fixed
ldx font_size_count
sta RAMWRTOFF
loop: lda font_width_table - 1,x
sta font_width_backup - 1,x
dex
bne loop
sta RAMWRTON
;; open file, get length
jsr open_file
lda open_params::ref_num
sta read_params::ref_num
sta set_mark_params::ref_num
sta get_eof_params::ref_num
sta close_params::ref_num
jsr get_file_eof
;; create window
A2D_CALL A2D_CREATE_WINDOW, window_params
A2D_CALL A2D_SET_STATE, window_params::box
jsr calc_window_size
jsr calc_and_draw_mode
jsr draw_content
A2D_CALL $2B ; ???
;; fall through
.endproc
;;; ==================================================
;;; Main Input Loop
input_loop:
A2D_CALL A2D_GET_INPUT, input_params
lda input_params
cmp #1 ; was clicked?
bne input_loop ; nope, keep waiting
A2D_CALL A2D_QUERY_TARGET, input_params::coords
lda target_params::win ; in our window?
cmp #window_id
bne input_loop
;; which part of the window?
lda target_params::elem
cmp #A2D_ELEM_CLOSE
beq on_close_click
;; title and resize clicks need mouse location
ldx input_params::xcoord
stx resize_drag_params::xcoord
stx query_client_params::xcoord
ldx input_params::xcoord+1
stx resize_drag_params::xcoord+1
stx query_client_params::xcoord+1
ldx input_params::ycoord
stx resize_drag_params::ycoord
stx query_client_params::ycoord
cmp #A2D_ELEM_TITLE
beq title
cmp #A2D_ELEM_RESIZE ; not enabled, so this will never match
beq input_loop
jsr on_client_click
jmp input_loop
title: jsr on_title_bar_click
jmp input_loop
;;; ==================================================
;;; Close Button
.proc on_close_click
A2D_CALL A2D_CLOSE_CLICK, close_btn_params ; wait to see if the click completes
lda close_btn_params::state ; did click complete?
beq input_loop ; nope
jsr close_file
A2D_CALL A2D_DESTROY_WINDOW, window_params
DESKTOP_CALL DESKTOP_REDRAW_ICONS
rts ; exits input loop
.endproc
;;; ==================================================
;;; Resize Handle
;;; This is dead code (no resize handle!) and may be buggy
.proc on_resize_click
A2D_CALL A2D_DRAG_RESIZE, resize_drag_params
jsr redraw_screen
jsr calc_window_size
max_width := default_width
lda #>max_width
cmp window_params::box::width+1
bne :+
lda #<max_width
cmp window_params::box::width
: bcs wider
lda #<max_width
sta window_params::box::width
lda #>max_width
sta window_params::box::width+1
sec
lda window_params::box::width
sbc window_width
sta window_params::box::hoff
lda window_params::box::width+1
sbc window_width+1
sta window_params::box::hoff+1
wider: lda window_params::hscroll
ldx window_width
cpx #<max_width
bne enable
ldx window_width+1
cpx #>max_width
bne enable
and #(<~A2D_CWS_SCROLL_TRACK) ; disable scroll
jmp :+
enable: ora #A2D_CWS_SCROLL_TRACK ; enable scroll
: sta window_params::hscroll
sec
lda #<max_width
sbc window_width
sta $06
lda #>max_width
sbc window_width+1
sta $07
jsr div_by_16
sta resize_window_params::L0987
lda #A2D_HSCROLL
sta resize_window_params::part
A2D_CALL A2D_RESIZE_WINDOW, resize_window_params ; change to clamped size ???
jsr calc_and_draw_mode
jmp finish_resize
.endproc
;;; ==================================================
;;; Client Area
;;; Non-title (client) area clicked
.proc on_client_click
;; On one of the scroll bars?
A2D_CALL A2D_QUERY_CLIENT, query_client_params
lda query_client_params::part
cmp #A2D_VSCROLL
beq on_vscroll_click
cmp #A2D_HSCROLL
bne end
jmp on_hscroll_click
end: rts
.endproc
;;; ==================================================
;;; Vertical Scroll Bar
.proc on_vscroll_click
lda #A2D_VSCROLL
sta thumb_drag_params::type
sta update_scroll_params::type
lda query_client_params::scroll
cmp #A2D_SCROLL_PART_THUMB
beq on_vscroll_thumb_click
cmp #A2D_SCROLL_PART_BELOW
beq on_vscroll_below_click
cmp #A2D_SCROLL_PART_ABOVE
beq on_vscroll_above_click
cmp #A2D_SCROLL_PART_UP
beq on_vscroll_up_click
cmp #A2D_SCROLL_PART_DOWN
bne end
jmp on_vscroll_down_click
end: rts
.endproc
.proc on_vscroll_thumb_click
jsr do_thumb_drag
lda thumb_drag_params::moved
beq end
lda thumb_drag_params::pos
sta update_scroll_params::pos
jsr update_voffset
jsr update_vscroll
jsr draw_content
lda L0947
beq end
lda L0949
bne end
jsr clear_window
end: rts
.endproc
.proc on_vscroll_above_click
loop: lda window_params::vspos
beq end
jsr calc_track_scroll_delta
sec
lda window_params::vspos
sbc track_scroll_delta
bcs store
lda #0 ; underflow
store: sta update_scroll_params::pos
jsr update_scroll_pos
bcc loop ; repeat while button down
end: rts
.endproc
.proc on_vscroll_up_click
loop : lda window_params::vspos
beq end
sec
sbc #1
sta update_scroll_params::pos
jsr update_scroll_pos
bcc loop ; repeat while button down
end: rts
.endproc
vscroll_max := $FA
.proc on_vscroll_below_click
loop: lda window_params::vspos
cmp #vscroll_max ; pos == max ?
beq end
jsr calc_track_scroll_delta
clc
lda window_params::vspos
adc track_scroll_delta ; pos + delta
bcs overflow
cmp #vscroll_max+1 ; > max ?
bcc store ; nope, it's good
overflow:
lda #vscroll_max ; set to max
store: sta update_scroll_params::pos
jsr update_scroll_pos
bcc loop ; repeat while button down
end: rts
.endproc
.proc on_vscroll_down_click
loop: lda window_params::vspos
cmp #vscroll_max
beq end
clc
adc #1
sta update_scroll_params::pos
jsr update_scroll_pos
bcc loop ; repeat while button down
end: rts
.endproc
.proc update_scroll_pos ; Returns with carry set if mouse released
jsr update_voffset
jsr update_vscroll
jsr draw_content
jsr was_button_released
clc
bne end
sec
end: rts
.endproc
.proc calc_track_scroll_delta
lda window_height ; ceil(??? / 50)
ldx #0
loop: inx
sec
sbc #50
cmp #50
bcs loop
stx track_scroll_delta
rts
.endproc
;;; ==================================================
;;; Horizontal Scroll Bar
;;; (Unused in STF DA, so most of this is speculation)
.proc on_hscroll_click
lda #A2D_HSCROLL
sta thumb_drag_params::type
sta update_scroll_params::type
lda query_client_params::scroll
cmp #A2D_SCROLL_PART_THUMB
beq on_hscroll_thumb_click
cmp #A2D_SCROLL_PART_AFTER
beq on_hscroll_after_click
cmp #A2D_SCROLL_PART_BEFORE
beq on_hscroll_before_click
cmp #A2D_SCROLL_PART_LEFT
beq on_hscroll_left_click
cmp #A2D_SCROLL_PART_RIGHT
beq on_hscroll_right_click
rts
.endproc
.proc on_hscroll_thumb_click
jsr do_thumb_drag
lda thumb_drag_params::moved
beq end
lda thumb_drag_params::pos
jsr mul_by_16
lda $06
sta window_params::box::hoff
lda $07
sta window_params::box::hoff+1
clc
lda window_params::box::hoff
adc window_width
sta window_params::box::width
lda window_params::box::hoff+1
adc window_width+1
sta window_params::box::width+1
jsr update_hscroll
jsr draw_content
end: rts
.endproc
.proc on_hscroll_after_click
ldx #2
lda window_params::hsmax
jmp hscroll_common
.endproc
.proc on_hscroll_before_click
ldx #254
lda #0
jmp hscroll_common
.endproc
.proc on_hscroll_right_click
ldx #1
lda window_params::hsmax
jmp hscroll_common
.endproc
.proc on_hscroll_left_click
ldx #255
lda #0
;; fall through
.endproc
.proc hscroll_common
sta compare+1
stx delta+1
loop: lda window_params::hspos
compare:cmp #$0A ; self-modified
bne continue
rts
continue:
clc
lda window_params::hspos
delta: adc #1 ; self-modified
bmi overflow
cmp window_params::hsmax
beq store
bcc store
lda window_params::hsmax
jmp store
overflow:
lda #0
store: sta window_params::hspos
jsr adjust_box_width
jsr update_hscroll
jsr draw_content
jsr was_button_released
bne loop
rts
.endproc
;;; ==================================================
;;; UI Helpers
;; Used at start of thumb drag
.proc do_thumb_drag
lda input_params::xcoord
sta thumb_drag_params::xcoord
lda input_params::xcoord+1
sta thumb_drag_params::xcoord+1
lda input_params::ycoord
sta thumb_drag_params::ycoord
A2D_CALL A2D_DRAG_SCROLL, thumb_drag_params
rts
.endproc
;;; Checks button state; z clear if button was released, set otherwise
.proc was_button_released
A2D_CALL A2D_GET_INPUT, input_params
lda input_params
cmp #2
rts
.endproc
;;; only used from hscroll code?
.proc adjust_box_width
lda window_params::hspos
jsr mul_by_16
clc
lda $06
sta window_params::box::hoff
adc window_width
sta window_params::box::width
lda $07
sta window_params::box::hoff+1
adc window_width+1
sta window_params::box::width+1
rts
.endproc
.proc update_voffset
lda #0
sta window_params::box::voff
sta window_params::box::voff+1
ldx update_scroll_params::pos
loop: beq adjust_box_height
clc
lda window_params::box::voff
adc #50
sta window_params::box::voff
bcc :+
inc window_params::box::voff+1
: dex
jmp loop
.endproc
.proc adjust_box_height
clc
lda window_params::box::voff
adc window_height
sta window_params::box::height
lda window_params::box::voff+1
adc window_height+1
sta window_params::box::height+1
jsr calc_line_position
lda #0
sta L096A
sta L096B
ldx update_scroll_params::pos
loop: beq end
clc
lda L096A
adc #5
sta L096A
bcc :+
inc L096B
: dex
jmp loop
end: rts
.endproc
.proc update_hscroll
lda #2
sta update_scroll_params::type
lda window_params::box::hoff
sta $06
lda window_params::box::hoff+1
sta $07
jsr div_by_16
sta update_scroll_params::pos
A2D_CALL A2D_UPDATE_SCROLL, update_scroll_params
rts
.endproc
.proc update_vscroll ; update_scroll_params::pos set by caller
lda #1
sta update_scroll_params::type
A2D_CALL A2D_UPDATE_SCROLL, update_scroll_params
rts
.endproc
.proc finish_resize ; only called from dead code
DESKTOP_CALL DESKTOP_REDRAW_ICONS
A2D_CALL A2D_SET_STATE, window_params::box
lda window_params::hscroll
ror a ; check if low bit (track enabled) is set
bcc :+
jsr update_hscroll
: lda window_params::vspos
sta update_scroll_params::pos
jsr update_vscroll
jsr draw_content
jmp input_loop
.endproc
.proc clear_window
A2D_CALL A2D_SET_PATTERN, white_pattern
A2D_CALL A2D_FILL_RECT, window_params::box::hoff
A2D_CALL A2D_SET_PATTERN, black_pattern
rts
.endproc
;;; ==================================================
;;; Content Rendering
.proc draw_content
lda #0
sta L0949
jsr assign_fixed_font_width_table_if_needed
jsr set_file_mark
lda #<default_buffer
sta read_params::buffer
sta $06
lda #>default_buffer
sta read_params::buffer+1
sta $07
lda #0
sta L0945
sta L0946
sta L0947
sta line_pos::base+1
sta L096C
sta L096D
sta L0948
lda #$0A ; line spacing = 10
sta line_pos::base
jsr L0EDB
do_line:
lda L096D
cmp L096B
bne :+
lda L096C
cmp L096A
bne :+
jsr clear_window
inc L0948
: A2D_CALL A2D_SET_POS, line_pos
sec
lda #250
sbc line_pos::left
sta L095B
lda #1
sbc line_pos::left+1
sta L095C
jsr find_text_run
bcs L0ED7
clc
lda text_string::len
adc $06
sta $06
bcc :+
inc $07
: lda L095A
bne do_line
clc
lda line_pos::base
adc #$0A ; line spacing = 10
sta line_pos::base
bcc :+
inc line_pos::base+1
: jsr L0EDB
lda L096C
cmp L0968
bne :+
lda L096D
cmp L0969
beq L0ED7
: inc L096C
bne :+
inc L096D
: jmp do_line
L0ED7: jsr restore_proportional_font_table_if_needed
rts
.endproc
;;; ==================================================
.proc L0EDB ; ???
lda #250
sta L095B
lda #1
sta L095C
lda #3
sta line_pos::left
lda #0
sta line_pos::left+1
sta L095A
rts
.endproc
;;; ==================================================
.proc find_text_run
lda #$FF
sta L0F9B
lda #0
sta run_width
sta run_width+1
sta L095A
sta text_string::len
lda $06
sta text_string::addr
lda $07
sta text_string::addr+1
loop: lda L0945
bne more
lda L0947
beq :+
jsr draw_text_run
sec
rts
: jsr ensure_page_buffered
more: ldy text_string::len
lda ($06),y
and #$7F ; clear high bit
sta ($06),y
inc L0945
cmp #ASCII_RETURN
beq finish_text_run
cmp #' ' ; space character
bne :+
sty L0F9B
pha
lda L0945
sta L0946
pla
: cmp #ASCII_TAB
bne :+
jmp handle_tab
: tay
lda font_width_table,y
clc
adc run_width
sta run_width
bcc :+
inc run_width+1
: lda L095C
cmp run_width+1
bne :+
lda L095B
cmp run_width
: bcc :+
inc text_string::len
jmp loop
: lda #0
sta L095A
lda L0F9B
cmp #$FF
beq :+
sta text_string::len
lda L0946
sta L0945
: inc text_string::len
;; fall through
.endproc
finish_text_run: jsr draw_text_run
ldy text_string::len
lda ($06),y
cmp #ASCII_TAB
beq tab
cmp #ASCII_RETURN
bne :+
tab: inc text_string::len
: clc
rts
;;; ==================================================
L0F9B: .byte 0
run_width: .word 0
.proc handle_tab
lda #1
sta L095A
clc
lda run_width
adc line_pos::left
sta line_pos::left
lda run_width+1
adc line_pos::left+1
sta line_pos::left+1
ldx #0
loop: lda times70+1,x
cmp line_pos::left+1
bne :+
lda times70,x
cmp line_pos::left
: bcs :+
inx
inx
cpx #14
beq done
jmp loop
: lda times70,x
sta line_pos::left
lda times70+1,x
sta line_pos::left+1
jmp finish_text_run
done: lda #0
sta L095A
jmp finish_text_run
times70:.word 70
.word 140
.word 210
.word 280
.word 350
.word 420
.word 490
.endproc
;;; ==================================================
;;; Draw a line of content
.proc draw_text_run
lda L0948
beq end
lda text_string::len
beq end
A2D_CALL A2D_DRAW_TEXT, text_string
lda #1
sta L0949
end: rts
.endproc
;;; ==================================================
.proc ensure_page_buffered
lda text_string::addr+1
cmp #>default_buffer
beq read
;; copy a page of characters from $1300 to the buffer
ldy #0
loop: lda $1300,y
sta default_buffer,y
iny
bne loop
dec text_string::addr+1
lda text_string::addr
sta $06
lda text_string::addr+1
sta $07
read: lda #0
sta L0945
jsr read_file_page
lda read_params::buffer+1
cmp #>default_buffer
bne :+
inc read_params::buffer+1
: rts
.endproc
;;; ==================================================
.proc read_file_page
lda read_params::buffer
sta store+1
lda read_params::buffer+1
sta store+2
lda #' ' ; fill buffer with spaces
ldx #0
sta RAMWRTOFF
store: sta default_buffer,x ; self-modified
inx
bne store
sta RAMWRTON ; read file chunk
lda #$00
sta L0947
jsr read_file
pha ; copy read buffer main>aux
lda #$00
sta STARTLO
sta DESTINATIONLO
lda #$FF
sta ENDLO
lda read_params::buffer+1
sta DESTINATIONHI
sta STARTHI
sta ENDHI
sec ; main>aux
jsr AUXMOVE
pla
beq end
cmp #$4C ; ???
beq done
brk ; ????
done: lda #$01
sta L0947
end: rts
.endproc
.proc calc_window_size
sec
lda window_params::box::width
sbc window_params::box::hoff
sta window_width
lda window_params::box::width+1
sbc window_params::box::hoff+1
sta window_width+1
sec
lda window_params::box::height
sbc window_params::box::voff
sta window_height
;; fall through
.endproc
;;; ==================================================
.proc calc_line_position
lda window_params::box::height
sta L0965
lda window_params::box::height+1
sta L0966
lda #0
sta L0968
sta L0969
loop: lda L0966
bne :+
lda L0965
cmp #$0A ; line spacing = 10
bcc end
: sec
lda L0965
sbc #$0A ; line spacing = 10
sta L0965
bcs :+
dec L0966
: inc L0968
bne loop
inc L0969
jmp loop
end: rts
.endproc
;;; ==================================================
.proc div_by_16 ; input in $06/$07, output in a
ldx #4
loop: clc
ror $07
ror $06
dex
bne loop
lda $06
rts
.endproc
.proc mul_by_16 ; input in a, output in $06/$07
sta $06
lda #0
sta $07
ldx #4
loop: clc
rol $06
rol $07
dex
bne loop
rts
.endproc
.proc redraw_screen
lda #<JUMP_TABLE_REDRAW_ALL
sta call_main_addr
lda #>JUMP_TABLE_REDRAW_ALL
sta call_main_addr+1
jsr call_main_trampoline
rts
.endproc
;;; ==================================================
;;; Restore the font glyph width table when switching
;;; back to proportional mode.
.proc restore_proportional_font_table_if_needed
lda fixed_mode_flag ; if not fixed (i.e. proportional)
beq done ; then exit
start := font_width_backup
end := font_width_backup + $7E
dest := font_width_table
lda #<start
sta STARTLO
lda #<end
sta ENDLO
lda #>start
sta STARTHI
sta ENDHI
lda #>dest
sta DESTINATIONHI
lda #<dest
sta DESTINATIONLO
sec ; main>aux
jsr AUXMOVE
done: rts
.endproc
;;; ==================================================
;;; Overwrite the font glyph width table (with 7s)
;;; when switching to fixed width mode.
.proc assign_fixed_font_width_table_if_needed
lda fixed_mode_flag ; if not fixed (i.e. proportional)
beq end ; then exit
ldx font_size_count
lda #7 ; 7 pixels/character
loop: sta font_width_table - 1,x
dex
bne loop
end: rts
.endproc
;;; ==================================================
;;; Title Bar (Proportional/Fixed mode button)
.proc on_title_bar_click
lda input_params::xcoord+1 ; mouse x high byte?
cmp mode_box_left+1
bne :+
lda input_params::xcoord
cmp mode_box_left
: bcc ignore
;; Toggle the state and redraw
lda fixed_mode_flag
beq set_flag
dec fixed_mode_flag ; clear flag (mode = proportional)
jsr restore_proportional_font_table_if_needed
jmp redraw
set_flag:
inc fixed_mode_flag ; set flag (mode = fixed)
redraw: jsr draw_mode
jsr draw_content
sec ; Click consumed
rts
ignore: clc ; Click ignored
rts
.endproc
fixed_str: A2D_DEFSTRING "Fixed "
prop_str: A2D_DEFSTRING "Proportional"
label_width := 50
title_bar_height := 12
.proc mode_box ; bounding box for mode label
left: .word 0
top: .word 0
addr: .word A2D_SCREEN_ADDR
stride: .word A2D_SCREEN_STRIDE
hoff: .word 0
voff: .word 0
width: .word 80
height: .word 10
.endproc
mode_box_left := mode_box::left ; forward refs to mode_box::left don't work?
;; https://github.com/cc65/cc65/issues/479
.proc mode_pos
left: .word 0 ; horizontal text offset
base: .word 10 ; vertical text offset (to baseline)
.endproc
.proc calc_and_draw_mode
sec
lda window_params::box::top
sbc #title_bar_height
sta mode_box::top
clc
lda window_params::box::left
adc window_width
pha
lda window_params::box::left+1
adc window_width+1
tax
sec
pla
sbc #<label_width
sta mode_box::left
txa
sbc #>label_width
sta mode_box::left+1
;; fall through...
.endproc
.proc draw_mode
A2D_CALL A2D_SET_BOX, mode_box
A2D_CALL A2D_SET_POS, mode_pos
lda fixed_mode_flag
beq else ; is proportional?
A2D_CALL A2D_DRAW_TEXT, fixed_str
jmp endif
else: A2D_CALL A2D_DRAW_TEXT, prop_str
endif: ldx #$0F
loop: lda default_box,x
sta window_params::box,x
dex
bpl loop
A2D_CALL A2D_SET_BOX, window_params::box
rts
.endproc
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