337 lines
4.4 KiB
NASM
337 lines
4.4 KiB
NASM
%include "ponydos.inc"
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cpu 8086
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bits 16
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org 0
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; 0x0000
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jmp near process_event
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; 0x0003
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initialize:
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push ds
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push cs
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pop ds
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; Set wallpaper
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mov si, wallpaper_name
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xor dx, dx
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call PONYDOS_SEG:SYS_OPEN_FILE
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mov bp, PONYDOS_SEG
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mov es, bp
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mov bx, GLOBAL_WALLPAPER
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xor di, di ; read
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call PONYDOS_SEG:SYS_MODIFY_SECTORS
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; Put window 1 in the window chain
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mov ax, cs
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add ax, 0x001
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xchg [es:GLOBAL_WINDOW_CHAIN_HEAD], ax
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mov [next_window1], ax
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; Put window 2 in the window chain
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mov ax, cs
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add ax, 0x002
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xchg [es:GLOBAL_WINDOW_CHAIN_HEAD], ax
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mov [next_window2], ax
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; Request repaint
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mov byte [es:GLOBAL_REDRAW], 1
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; Temporary testing
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mov ax, cs
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mov es, ax
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mov di, window_1 + 32
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mov cx, 3
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mov dx, 16
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call print_ls
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mov di, window_2 + 80
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mov cx, 3
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mov dx, 40
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call print_ls
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pop ds
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retf
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process_event:
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push ax
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push bx
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push cx
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push dx
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push si
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push di
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push bp
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push ds
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push es
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mov bp, cs
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mov ds, bp
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mov es, bp
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cmp ax, WM_PAINT
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jne .not_paint
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call paint
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.not_paint:
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pop es
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pop ds
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pop bp
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pop di
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pop si
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pop dx
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pop cx
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pop bx
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pop ax
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retf
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paint:
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mov bp, cs
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sub bx, bp
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cmp bx, 0x001
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je .window1
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cmp bx, 0x002
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je .window2
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mov ax, bx
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call hexprint16
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call hang
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.window1:
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mov bx, [next_window1]
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call forward_event
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mov byte [window_1.number], '1'
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; Draw a rectangle on-screen
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mov bx, 16
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mov cx, 16
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mov dx, 4
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mov si, window_1
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mov di, 10
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mov bp, 3
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call PONYDOS_SEG:SYS_DRAW_RECT
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ret
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.window2:
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mov bx, [next_window2]
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call forward_event
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mov byte [window_2.number], '2'
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mov bx, 40
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mov cx, 40
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mov dx, 4
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mov si, window_2
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mov di, 14
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mov bp, 6
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call PONYDOS_SEG:SYS_DRAW_RECT
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ret
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; in
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; cx = height of window (>= 1)
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; dx = width of window in characters
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; es:di = start of output
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print_ls:
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push ax
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push bx
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push cx
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push si
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push di
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push bp
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push ds
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mov bp, PONYDOS_SEG
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mov ds, bp
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push cx
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push di
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mov si, GLOBAL_DIRENTS + 2
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xor ax, ax ; Maximum filename size
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.name_loop:
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cmp word [ds:si - 2], 0
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je .done_names
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push cx
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call strlen
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mov bx, cx
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pop cx
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cmp bx, dx
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jle .not_long_filename
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mov bx, dx
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.not_long_filename:
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cmp ax, bx
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jge .not_new_max
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mov ax, bx
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.not_new_max:
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push si
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push di
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.copy:
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movsb
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inc di ; Formatting
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dec bx
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jnz .copy
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pop di
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pop si
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; Move to next line
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add di, dx
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add di, dx
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add si, FS_DIRENT_SIZE
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cmp si, GLOBAL_DIRENTS + 0x200
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jge .done_names
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dec cx
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jnz .name_loop
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.done_names:
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pop di
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pop cx
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; Don't print sizes for too short a window
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cmp dx, 10
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jle .done
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add ax, 5 ; 1 whitespace, 4 length
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cmp ax, dx
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jle .not_truncate
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mov ax, dx
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.not_truncate:
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sub ax, 5 ; Go to start of where to put the file length
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add di, ax
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add di, ax
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mov si, GLOBAL_DIRENTS
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.size_loop:
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mov ax, word [ds:si]
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test ax, ax
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jz .done
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mov byte [es:di + 8], 'K'
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shr ax, 1
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aam ; mango
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add ax, 0x3030
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cmp ah, 0x30
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je .one_digit
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mov byte [es:di + 2], ' '
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mov [es:di + 4], ah
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jmp .one_digit_print
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.one_digit:
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test word [ds:si], 1
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jnz .one_and_half_digit
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mov byte [es:di + 4], ' '
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.one_digit_print:
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mov [es:di + 6], al
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jmp .next_iter_size_loop
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.one_and_half_digit:
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mov byte [es:di], ' '
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mov byte [es:di + 2], al
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mov byte [es:di + 4], '.'
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mov byte [es:di + 6], '5'
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.next_iter_size_loop:
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; Move to next line
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add di, dx
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add di, dx
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add si, FS_DIRENT_SIZE
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cmp si, GLOBAL_DIRENTS + 0x200
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jge .done
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dec cx
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jnz .size_loop
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.done:
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pop ds
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pop bp
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pop di
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pop si
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pop cx
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pop bx
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pop ax
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ret
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; in:
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; ds:si = string
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; out:
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; cx = stlen
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strlen:
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push ax
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push di
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push es
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mov cx, ds
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mov es, cx
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mov di, si
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mov cx, -1
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xor ax, ax
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repne scasb
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not cx
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dec cx
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pop es
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pop di
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pop ax
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ret
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; in:
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; bx = window ID
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; out:
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; clobbers di
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forward_event:
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cmp bx, 0
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je .end
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push cs ; Return segment
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mov di, .end
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push di ; Return offset
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mov di, 0xf000
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and di, bx
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push di ; Call segment
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xor di, di
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push di ; Call offset
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retf
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.end:
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ret
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next_window1 dw 0
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next_window2 dw 0
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wallpaper_name db 'wallpaper.bin', 0
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%include "debug.inc"
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window_1:
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db 'W', 0x0f, 'i', 0x0f, 'n', 0x0f, 'd', 0x0f, 'o', 0x0f, 'w', 0x0f, ' ', 0x0f,
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.number db '*', 0x0f
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times 8 db ' ', 0x0f
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times 16 db ' ', 0xf0
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times 16 db ' ', 0xf0
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times 16 db ' ', 0xf0
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window_2:
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db 'W', 0x0f, 'i', 0x0f, 'n', 0x0f, 'd', 0x0f, 'o', 0x0f, 'w', 0x0f, ' ', 0x0f,
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.number db '*', 0x0f
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times 32 db ' ', 0x0f
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times 40 db ' ', 0xf0
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times 40 db ' ', 0xf0
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times 40 db ' ', 0xf0
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