asmedit.inc

一个用纯汇编 写的操作系统 源代码 是用 TASM 编译器写的

    caret_line_ok:
	mov	eax,[pos.caretPosition]
	sub	eax,1
	jc	moved_selection
	mov	[caret_position],eax
	jmp	moved_selection
aem_getpos:
	mov	edi,[wparam]
	mov	eax,[caret_line_number]
	mov	[pos.selectionLine],eax
	mov	[pos.caretLine],eax
	mov	eax,[caret_position]
	inc	eax
	mov	[pos.selectionPosition],eax
	mov	[pos.caretPosition],eax
	cmp	[selection_line],0
	je	ignore
	mov	eax,[selection_line_number]
	mov	[pos.selectionLine],eax
	mov	eax,[selection_position]
	inc	eax
	mov	[pos.selectionPosition],eax
	jmp	ignore
aem_findfirst:
	mov	esi,[lparam]
	mov	eax,[wparam]
	call	find_first
	jnc	show_found_text
	jmp	ignore
aem_findnext:
	call	find_next
	jc	ignore
    show_found_text:
	mov	eax,[caret_position]
	xchg	eax,[selection_position]
	mov	[caret_position],eax
	call	update_positions
	call	let_caret_appear
	mov	eax,[caret_position]
	xchg	eax,[selection_position]
	mov	[caret_position],eax
	mov	[return_value],TRUE
	jmp	moved_selection
aem_canfindnext:
	cmp	[search_data],0
	je	ignore
	mov	[return_value],TRUE
	jmp	ignore
aem_getwordatcaret:
	cmp	[wparam],0
	je	ignore
	call	get_word_edges
	mov	eax,ebx
	add	eax,[wparam]
	dec	eax
	cmp	eax,ecx
	jae	word_buffer_length_ok
	mov	ecx,eax
    word_buffer_length_ok:
	sub	ecx,ebx
	push	[caret_position]
	mov	[caret_position],ebx
	push	ecx
	call	get_caret_segment
	pop	ebx
	mov	edi,[lparam]
	or	ebx,ebx
	jz	word_copied
    copy_word:
	mov	ecx,SEGMENT_DATA_LENGTH
	sub	ecx,edx
	cmp	ecx,ebx
	jbe	word_part_length_ok
	mov	ecx,ebx
    word_part_length_ok:
	sub	ebx,ecx
	add	[return_value],ecx
	mov	eax,[esi]
	lea	esi,[esi+SEGMENT_HEADER_LENGTH+edx]
	rep	movsb
	or	ebx,ebx
	jz	word_copied
	xor	edx,edx
	mov	esi,eax
	btr	esi,0
	jc	copy_word
    word_copied:
	xor	al,al
	stosb
	pop	[caret_position]
	jmp	ignore
moved_caret:
	test	[kbstate+VK_SHIFT],80h
	jnz	moved_selection
	mov	[selection_line],0
moved_selection:
	mov	[notification],AEN_POSCHANGE
	jmp	update_all
moved_window:
	call	update_positions
	jmp	refresh
text_modified:
	mov	[notification],AEN_TEXTCHANGE
	mov	eax,[peak_line_length]
	xor	edx,edx
	mov	ebx,SEGMENT_DATA_LENGTH
	div	ebx
	inc	eax
	mul	ebx
	shl	eax,1
	cmp	eax,[line_buffer_size]
	je	update_all
	mov	[line_buffer_size],eax
	invoke	VirtualAlloc,0,[line_buffer_size],MEM_COMMIT,PAGE_READWRITE
	or	eax,eax
	jz	memory_shortage
	xchg	[line_buffer],eax
	invoke	VirtualFree,eax,0,MEM_RELEASE
    update_all:
	call	update_positions
	call	let_caret_appear
    refresh:
	cmp	[screen_base],0
	je	wm_size
	mov	eax,[screen_size]
	shl	eax,1
	xor	[screen_offset],eax
	call	update_screen
	mov	esi,[screen_base]
	mov	eax,[screen_size]
	lea	edi,[esi+eax*2]
	mov	[rect.top],0
	mov	edx,[font_height]
	mov	[rect.bottom],edx
	mov	ecx,[screen_height]
    refresh_screen:
	push	ecx
	mov	ebx,[screen_size]
	mov	edx,[font_width]
	xor	eax,eax
	mov	[rect.left],eax
	mov	[rect.right],eax
	mov	ecx,[screen_width]
    refresh_line:
	mov	al,[esi]
	mov	ah,[esi+ebx]
	cmp	al,[edi]
	jne	refresh_changed
	cmp	ah,[edi+ebx]
	jne	refresh_changed
	inc	esi
	inc	edi
	add	[rect.left],edx
	add	[rect.right],edx
	loop	refresh_line
	jmp	refresh_next_line
    refresh_changed:
	mov	al,[esi]
	mov	ah,[esi+ebx]
	inc	esi
	add	[rect.right],edx
	cmp	al,[edi]
	jne	changed_more
	cmp	ah,[edi+ebx]
	jne	changed_more
	inc	edi
	jmp	invalidate
    changed_more:
	inc	edi
	loop	refresh_changed
    invalidate:
	push	ecx edx
	lea	eax,[rect]
	invoke	InvalidateRect,[hwnd],eax,FALSE
	pop	edx ecx
	mov	eax,[rect.right]
	mov	[rect.left],eax
	jecxz	refresh_next_line
	loop	refresh_line
    refresh_next_line:
	mov	eax,[font_height]
	add	[rect.top],eax
	add	[rect.bottom],eax
	pop	ecx
	dec	ecx
	jnz	refresh_screen
	jmp	done
ignore:
	mov	dl,[last_operation]
	mov	[current_operation],dl
	cmp	[was_selection],0
	jne	done
	mov	[selection_line],0
done:
	cmp	[focus],0
	je	caret_ok
	call	update_caret_position
	invoke	ShowCaret,[hwnd]
    caret_ok:
	lea	esi,[editor_data]
	mov	edi,[editor_memory]
	add	edi,8
	mov	ecx,editor_data_size shr 2
	rep	movsd
	cmp	[notification],0
	je	notification_ok
	invoke	GetWindowLong,[hwnd],GWL_HWNDPARENT
	mov	edi,eax
	invoke	GetWindowLong,[hwnd],GWL_ID
	movzx	ebx,[notification]
	shl	ebx,16
	or	eax,ebx
	invoke	SendMessage,edi,WM_COMMAND,eax,[hwnd]
    notification_ok:
	cmp	[redraw_now],0
	je	redraw_ok
	invoke	UpdateWindow,[hwnd]
    redraw_ok:
	mov	eax,[return_value]
finish_wndproc:
	pop	edi esi ebx
	ret
not_enough_memory:
	lea	esp,[editor_memory-10h]
	mov	[notification],AEN_OUTOFMEMORY
	or	[return_value],-1
	cmp	[clipboard_opened],0
	je	ignore
	invoke	CloseClipboard
	mov	[clipboard_opened],0
	jmp	ignore
get_memory:
	invoke	VirtualAlloc,0,ecx,MEM_COMMIT,PAGE_READWRITE
	retn
release_memory:
	invoke	VirtualFree,eax,0,MEM_RELEASE
	retn
update_positions:
	lea	eax,[rect]
	invoke	GetClientRect,[hwnd],eax
	mov	eax,[rect.right]
	sub	eax,[rect.left]
	cdq
	div	[font_width]
	mov	[window_width],eax
	add	edx,-1
	adc	eax,0
	mov	[screen_width],eax
	mov	eax,[rect.bottom]
	sub	eax,[rect.top]
	cdq
	div	[font_height]
	mov	[window_height],eax
	add	edx,-1
	adc	eax,0
	mov	[screen_height],eax
	call	update_window
    setup_vscroll:
	mov	ecx,[lines_count]
	mov	[sc.cbSize],sizeof.SCROLLINFO
	mov	[sc.fMask],SIF_DISABLENOSCROLL+SIF_RANGE+SIF_PAGE+SIF_POS
	mov	[sc.nMin],1
	mov	[sc.nMax],ecx
	mov	eax,[window_height]
	mov	[sc.nPage],eax
	mov	edx,[window_line_number]
	mov	[sc.nPos],edx
	test	[editor_style],WS_VSCROLL
	jz	setup_hscroll
	lea	eax,[sc]
	invoke	SetScrollInfo,[hwnd],SB_VERT,eax,TRUE
    setup_hscroll:
	mov	ecx,[maximum_position]
	mov	[sc.nMin],0
	mov	[sc.nMax],ecx
	mov	eax,[window_width]
	mov	[sc.nPage],eax
	mov	edx,[window_position]
	mov	[sc.nPos],edx
	test	[editor_style],WS_HSCROLL
	jz	setup_caret
	lea	eax,[sc]
	invoke	SetScrollInfo,[hwnd],SB_HORZ,eax,TRUE
    setup_caret:
	mov	eax,[font_width]
	mov	edx,[caret_position]
	sub	edx,[window_position]
	imul	eax,edx
	mov	[caret_x],eax
	mov	eax,[font_height]
	mov	edx,[caret_line_number]
	sub	edx,[window_line_number]
	imul	eax,edx
	mov	[caret_y],eax
	retn
create_caret:
	xor	eax,eax
	test	[editor_mode],AEMODE_OVERWRITE
	jnz	block_caret
	test	[editor_style],AES_CONSOLECARET
	jnz	console_caret
	invoke	CreateCaret,[hwnd],NULL,0,[font_height]
	jmp	update_caret_position
    block_caret:
	invoke	CreateCaret,[hwnd],NULL,[font_width],[font_height]
	jmp	update_caret_position
    console_caret:
	invoke	CreateCaret,[hwnd],NULL,[font_width],2
update_caret_position:
	mov	eax,[caret_y]
	test	[editor_mode],AEMODE_OVERWRITE
	jnz	set_position
	test	[editor_style],AES_CONSOLECARET
	jz	set_position
	add	eax,[font_height]
	sub	eax,2
    set_position:
	invoke	SetCaretPos,[caret_x],eax
	retn
update_screen:
	mov	edi,[screen_base]
	or	edi,edi
	jz	screen_prepared
	add	edi,[screen_offset]
	mov	ebx,[screen_size]
	add	ebx,edi
	push	ebx
	mov	ecx,[screen_height]
	mov	esi,[window_line]
    prepare_screen:
	push	ecx
	test	byte [esi],1
	jnz	prepare_long_line
	push	esi
	add	esi,SEGMENT_HEADER_LENGTH
	mov	ecx,SEGMENT_DATA_LENGTH
	call	prepare_line
	pop	esi
	mov	esi,[esi]
	jmp	prepare_next_line
    prepare_long_line:
	push	edi
	mov	edi,[line_buffer]
	xor	eax,eax
    combine_long_line_segments:
	add	esi,SEGMENT_HEADER_LENGTH
	mov	ecx,SEGMENT_DATA_LENGTH
	rep	movsb
	add	eax,SEGMENT_DATA_LENGTH
	mov	esi,[esi-SEGMENT_LENGTH]
	btr	esi,0
	jc	combine_long_line_segments
	mov	ecx,eax
	mov	eax,esi
	mov	esi,edi
	sub	esi,ecx
	pop	edi
	push	eax
	call	prepare_line
	pop	esi
    prepare_next_line:
	pop	ecx
	dec	ecx
	jz	prepare_selection
	or	esi,esi
	jnz	prepare_screen
    prepare_empty_lines:
	imul	ecx,[screen_width]
	xor	al,al
	mov	edx,ecx
	rep	stosb
	xchg	edi,ebx
	mov	ecx,edx
	rep	stosb
    prepare_selection:
	pop	ebx
	test	[editor_style],ES_NOHIDESEL
	jnz	hideselection_ok
	cmp	[focus],0
	je	screen_prepared
    hideselection_ok:
	cmp	[selection_line],0
	je	screen_prepared
	mov	eax,[window_line_number]
	mov	esi,[selection_line_number]
	mov	edi,[caret_line_number]
	sub	esi,eax
	sub	edi,eax
	mov	ecx,[window_position]
	mov	eax,[selection_position]
	mov	edx,[caret_position]
	sub	eax,ecx
	sub	edx,ecx
	cmp	esi,edi
	jle	selection_boundaries_ok
	xchg	esi,edi
	xchg	eax,edx
    selection_boundaries_ok:
	mov	ecx,[screen_height]
	cmp	edi,0
	jl	screen_prepared
	cmp	esi,ecx
	jge	screen_prepared
	cmp	esi,edi
	je	prepare_vsel
	test	[editor_mode],AEMODE_VERTICALSEL
	jz	prepare_hsel
    prepare_vsel:
	cmp	eax,edx
	jle	vselection_boundaries_ok
	xchg	eax,edx
    vselection_boundaries_ok:
	cmp	esi,0
	jge	vselection_start_ok
	xor	esi,esi
    vselection_start_ok:
	inc	edi
	cmp	edi,ecx
	jle	vselection_end_ok
	mov	edi,ecx
    vselection_end_ok:
	mov	ecx,[screen_width]
	cmp	edx,0
	jl	screen_prepared
	cmp	eax,ecx
	jge	screen_prepared
	cmp	eax,0
	jge	vselection_line_start_ok
	xor	eax,eax
    vselection_line_start_ok:
	cmp	edx,ecx
	jle	vselection_line_end_ok
	mov	edx,ecx
    vselection_line_end_ok:
	mov	ecx,edi
	sub	ecx,esi
	imul	esi,[screen_width]
	add	ebx,esi
    prepare_vselection_line:
	push	eax ecx
	mov	edi,ebx
	mov	ecx,edx
	sub	ecx,eax
	lea	edi,[ebx+eax]
	mov	al,80h
	rep	stosb
	add	ebx,[screen_width]
	pop	ecx eax
	loop	prepare_vselection_line
	jmp	screen_prepared
    prepare_hsel:
	cmp	esi,0
	jge	hselection_start_ok
	xor	esi,esi
	xor	eax,eax
    hselection_start_ok:
	cmp	edi,ecx
	jl	hselection_end_ok
	mov	edi,ecx
	xor	edx,edx
    hselection_end_ok:
	inc	esi
	mov	ecx,edi
	sub	ecx,esi
	imul	ecx,[screen_width]
	imul	esi,[screen_width]
	lea	edi,[ebx+esi]
	neg	eax
	add	eax,[screen_width]
	cmp	eax,0
	jle	hselection_start_line_ok
	sub	edi,eax
	add	ecx,eax
	sub	eax,[screen_width]
	jle	hselection_start_line_ok
	add	edi,eax
	sub	ecx,eax
    hselection_start_line_ok:
	cmp	edx,0
	jle	hselection_end_line_ok
	add	ecx,edx
	sub	edx,[screen_width]
	jle	hselection_end_line_ok
	sub	ecx,edx
    hselection_end_line_ok:
	mov	al,80h
	rep	stosb
    screen_prepared:
	retn
    prepare_line:
	push	edi ecx
	mov	ecx,[esp]
	mov	edi,[line_buffer]
	add	edi,ecx
	shr	ecx,2
	xor	eax,eax
	rep	stosd
	mov	ecx,[esp]
	sub	edi,ecx
	invoke	syntax_proc,esi,ecx,edi
	mov	edx,edi
	pop	eax edi
	push	esi edx
	mov	edx,[window_position]
	lea	esi,[esi+edx]
	sub	eax,edx
	jnc	line_position_ok
	xor	eax,eax
	jmp	line_length_ok
    line_position_ok:
	cmp	eax,[screen_width]
	jbe	line_length_ok
	mov	eax,[screen_width]
    line_length_ok:
	mov	ecx,eax
	rep	movsb
	pop	esi
	add	esi,edx
	mov	ecx,eax
	xchg	edi,ebx
	rep	movsb
	xchg	edi,ebx
	pop	esi
	cmp	eax,[screen_width]
	jb	after_end_of_line
	retn
    after_end_of_line:
	mov	ecx,[screen_width]
	sub	ecx,eax
	xor	al,al
	mov	edx,ecx
	rep	stosb
	xchg	edi,ebx
	mov	ecx,edx
	rep	stosb
	xchg	edi,ebx
	retn

include '..\memory.inc'
include '..\navigate.inc'
include '..\edit.inc'
include '..\blocks.inc'
include '..\search.inc'
include '..\undo.inc'

endp

proc SyntaxProc lpLine,uChars,lpColors
	ret
endp