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kolibrios/programs/network/ircc/textbox.inc
hidnplayr a8a15eb424 Bugfixes in UTF-8 character counting for IRC client. 
git-svn-id: svn://kolibrios.org@6596 a494cfbc-eb01-0410-851d-a64ba20cac60
2016-10-15 13:44:06 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; Written by hidnplayr@kolibrios.org ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
text_insert_newlines: ; esi = ASCIIZ string
xor edx, edx ; number of lines of text
cmp byte[esi], 0
je .done
.next_line:
xor ebx, ebx
mov ecx, [textbox_width]
inc ecx
.more:
dec ecx
jz .end_of_line
.next_byte:
lodsb ; get one character of the string
test al, al ; end of string?
jz .almost_done
cmp al, ' ' ; it's a space! remember its position
je .space
cmp al, 13 ; we already inserted a newline once, make it a space again
je .soft_nl
cmp al, 10 ; it's a newline, continue onto the next line
je .newline
and al, 0xc0 ; Is it a multi byte UTF8 char?
cmp al, 0x80
je .next_byte
jmp .more
.newline:
inc edx
jmp .next_line
.soft_nl:
mov byte[esi-1], ' '
.space:
mov ebx, esi ; last detected space
jmp .more
.end_of_line:
inc edx
test ebx, ebx ; did we detect any spaces on this line?
jz .next_line ; no: just continue onto the next line
mov byte[ebx-1], 13 ; yes: replace last space on line with a soft newline
mov esi, ebx ; and continue parsing just after last space
jmp .next_line ;
.almost_done:
dec esi
.done:
ret
;----------------------------------
; scan untill next line is reached
;
; When you set the direction flag before calling, you can also scan for previous line!
; IN: esi
; OUT: esi
;----------------------------------
text_nextline:
mov ecx, [textbox_width]
.loop:
lodsb
test al, al
jz .done
cmp al, 10
je .done
cmp al, 13
je .done
and al, 0xc0
cmp al, 0x80
je .loop ; This byte is the second, third or fourth byte of a multi-byte UTF8 char
dec ecx
jnz .loop
.done:
ret
;----------------------------------
; print string
;
; IN: esi = ptr to string
; bl = char which marks end of string
; OUT: esi = ptr to end of str
;----------------------------------
print_string:
push eax
.loop:
lodsb
cmp al, bl
je .done
cmp al, 13
je .loop
test al, al
jz .done
call print_char
jmp .loop
.done:
pop eax
ret
;----------------------------------
; print ASCIIZ string
;
; IN: esi = ptr to ASCIIZ string
; OUT: esi = ptr to end of str
;----------------------------------
print_asciiz:
push eax
.loop:
lodsb
test al, al
jz .done
call print_char
jmp .loop
.done:
pop eax
ret
;----------------------------------
; print character
;
; IN: al = char to print
; OUT: /
;----------------------------------
print_char:
push esi edi
mov esi, [window_print]
mov edi, [esi + window.text_write]
stosb
cmp edi, [esi + window.text_end]
jae .uh_ow
mov [esi + window.text_write], edi
.continue:
or [esi + window.flags], FLAG_UPDATED
pop edi esi
ret
.uh_ow:
pusha
mov edi, [esi + window.text_start]
mov [esi + window.text_print], edi
lea esi, [edi + TEXT_BUFFERSIZE/2]
call text_nextline
mov ecx, TEXT_BUFFERSIZE/8
rep movsd
mov esi, edi
call text_insert_newlines
mov ebx, [window_print]
mov [ebx + window.text_lines], edx
mov [ebx + window.text_scanned], esi
mov [ebx + window.text_write], esi
mov [ebx + window.text_line_print], 0
popa
jmp .continue
draw_channel_text:
mov edi, [window_active]
and [edi + window.flags], not FLAG_UPDATED ; clear the 'window is updated' flag
; Scan new text for newlines
mov esi, [edi + window.text_scanned]
call text_insert_newlines
add [edi + window.text_lines], edx
mov [edi + window.text_scanned], esi
; Is scrollbar at lowest position?
test [edi + window.flags], FLAG_SCROLL_LOW
jnz .yesscroll ; Yes
cmp [scroll2.all_redraw], 1 ; No
jnz .noscroll
mov edx, [textbox_height]
add edx, [edi + window.text_line_print]
cmp edx, [edi + window.text_lines]
jl .noscroll
.yesscroll:
; Scrollbar was at lowest position, scroll down automatically when new text arrived.
mov edx, [edi + window.text_lines]
sub edx, [textbox_height]
jg @f
mov [edi + window.text_line_print], 0
jmp .noscroll ; There are less lines of text than fit into the window, dont scroll..
@@:
sub edx, [edi + window.text_line_print]
je .noscroll ; We are already at the bottom pos, dont scroll..
.scroll_to_pos: ; edx = number of lines to go up/down (flags must indicate direction)
pushf
add [edi + window.text_line_print], edx
mov esi, [edi + window.text_print]
popf
jg .loop_forward
std ; set direction flag so we can scan backwards
dec esi
dec esi ; move our cursor just in front of newline, for scanning backwards
.loop_backward:
call text_nextline
inc edx
jnz .loop_backward
inc esi
inc esi ; move the cursor just after last newline
cld
jmp .ok
.loop_forward:
call text_nextline
dec edx
jnz .loop_forward
.ok:
mov [edi + window.text_print], esi
.noscroll:
; Update and draw scrollbar when nescessary
mov edx, [edi + window.text_lines]
cmp edx, [textbox_height]
jbe .scroll_done
mov [scroll2.max_area], edx
mov eax, [edi + window.text_line_print]
mov [scroll2.position], eax
push dword scroll2 ; redraw scrollbar
call [scrollbar_draw]
mov [scroll2.all_redraw], 0 ; next time, dont redraw it completely
.scroll_done:
; Calculate start offset coordinates (align text to bottom)
mov ebx, [textbox_height]
sub ebx, [edi + window.text_lines]
jb .no_offset
imul ebx, FONT_HEIGHT
push [edi + window.text_start]
pop [edi + window.text_print]
jmp .draw_text
.no_offset:
xor ebx, ebx
.draw_text:
; Prepare to actually draw some text
add ebx, TEXT_X shl 16 + TEXT_Y ; text coordinates
mov ecx, [colors.work_text] ; default text color
or ecx, 0x30000000
mov edx, [edi + window.text_print] ; start of text to print
; Scan backwards on line for color escape codes
mov esi, edx
push edx
std
@@:
lodsb
cmp al, 0 ; end of text
je @f
cmp al, 10 ; hard newline
je @f
cmp al, 3 ; mIRC escape code
jne @b
cld
lea edx, [esi+2]
call dec_to_esi
jz @f
mov ecx, [irc_colors + 4*esi]
or ecx, 0x30000000 ; UTF-8 text
cmp byte[edx], ',' ; background color?
jne @f
inc edx
call dec_to_esi
jz @f
mov edi, [irc_colors + 4*esi]
or ecx, 0x40000000 ; enable background color
@@:
cld
pop edx
mov eax, [textbox_height] ; max number of lines to draw
.drawloop:
cmp byte[edx], 0
je .end_of_text
; Clear one row of characters
pusha
mov cx, bx
shl ecx, 16
mov cx, FONT_HEIGHT
mov ebx, TEXT_X shl 16
mov bx, word[textbox_width]
imul bx, FONT_WIDTH
mov edx, [colors.work]
mcall 13 ; draw rectangle
popa
push eax
mov esi, [textbox_width]
.line:
cmp byte[edx], 0
je .end_of_text
cmp byte[edx], 13
je .newline_soft
cmp byte[edx], 10
je .newline_hard
push esi
cmp byte[edx], 3 ; escape code for mIRC colors
jne .no_colors
inc edx
call dec_to_esi
jz .no_colors
mov ecx, [irc_colors + 4*esi]
or ecx, 0x30000000
cmp byte[edx], ',' ; background color?
jne .no_colors
inc edx
call dec_to_esi
jz .no_colors
mov edi, [irc_colors + 4*esi]
or ecx, 0x40000000
.no_colors:
mov esi, 1
mcall 4 ; draw text
mov esi, 1
mov al, byte[edx]
test al, 10000000b
jz @f
mov esi, 4
and al, 11111000b
cmp al, 11110000b
je @f
dec esi
and al, 11110000b
cmp al, 11100000b
je @f
dec esi
@@:
add ebx, FONT_WIDTH shl 16
add edx, esi
pop esi
dec esi
jnz .line
jmp .line_full
.newline_hard:
mov ecx, [colors.work_text]
or ecx, 0x30000000
.newline_soft:
inc edx
.line_full:
and ebx, 0x0000ffff
add ebx, TEXT_X shl 16 + FONT_HEIGHT
pop eax
dec eax
jnz .drawloop
.end_of_text:
ret
dec_to_esi:
xor esi, esi
.loop:
movzx eax, byte[edx]
sub al, '0'
jb .done
cmp al, 9
ja .done
inc edx
lea esi, [esi*4 + esi] ; esi * 5
lea esi, [esi*2 + eax] ; esi * 2 + eax
jmp .loop
.done:
cmp esi, 16
jae .fail
ret
.fail:
xor esi, esi
ret
if TIMESTAMP
print_timestamp:
pusha
mcall 3 ; get system time
mov ebx, eax
mov al, '['
call print_char
mov ecx, TIMESTAMP
.loop:
mov al, bl
shr al, 4
add al, '0'
call print_char
mov al, bl
and al, 0x0f
add al, '0'
call print_char
dec ecx
jz .done
mov al, ':'
call print_char
shr ebx, 8
jmp .loop
.done:
mov al, ']'
call print_char
mov al, ' '
call print_char
popa
ret
end if
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