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source: xtideuniversalbios/trunk/Assembly_Library/Src/Menu/Dialog/DialogFile.asm@ 195

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Last change on this file since 195 was 181, checked in by krille_n_@…, 13 years ago

Changes to all parts of the project:

Size optimizations.
Added a define (EXCLUDE_FROM_XTIDECFG) to exclude unused library code from XTIDECFG.
Tried to minimize time spent with interrupts disabled.
Some minor attempts to improve speed (reordering instructions etc).
Tried to improve readability, did some cleanup and fixed some errors in comments.

File size: 22.2 KB

Rev	Line
[41]	1	; Project name : Assembly Library
	2	; Description : Displays file dialog.
	3
	4
	5	CURRENTDIR_CHARACTERS EQU 002Eh
	6	UPDIR_CHARACTERS EQU 2E2Eh
	7
	8	; Section containing code
	9	SECTION .text
	10
	11	;--------------------------------------------------------------------
	12	; DialogFile_GetFileNameWithIoInDSSI
	13	; Parameters:
	14	; DS:SI: Ptr to FILE_DIALOG_IO
	15	; SS:BP: Ptr to parent MENU
	16	; Returns:
	17	; Nothing
	18	; Corrupts registers:
	19	; AX, BX, CX, DX, SI, DI
	20	;--------------------------------------------------------------------
	21	ALIGN JUMP_ALIGN
	22	DialogFile_GetFileNameWithIoInDSSI:
	23	mov bx, FileEventHandler
	24	mov BYTE [si+FILE_DIALOG_IO.bUserCancellation], TRUE
	25	jmp Dialog_DisplayWithDialogInputInDSSIandHandlerInBX
	26
	27
	28	;--------------------------------------------------------------------
	29	; FileEventHandler
	30	; Common parameters for all events:
	31	; BX: Menu event (anything from MENUEVENT struct)
	32	; SS:BP: Ptr to DIALOG
	33	; Common return values for all events:
	34	; CF: Set if event processed
	35	; Cleared if event not processed
	36	; Corrupts registers:
	37	; All
	38	;--------------------------------------------------------------------
	39	ALIGN JUMP_ALIGN
	40	FileEventHandler:
	41	jmp [cs:bx+.rgfnEventHandlers]
	42
	43
	44	ALIGN JUMP_ALIGN
	45	.ItemSelectedFromCX:
	46	call LoadItemStringBufferToESDI
[106]	47	call Registers_CopyESDItoDSSI
[52]	48	call ItemLineSplitter_GetLineToDSSIandLengthToCXfromStringInDSSIwithIndexInCX
[41]	49	jmp ParseSelectionFromItemLineInDSSI
	50
	51
	52	ALIGN JUMP_ALIGN
	53	.RefreshInformation:
	54	call GetInfoLinesToCXandDialogFlagsToAX
	55	mov si, [cs:.rgszInfoStringLookup]
	56	xor bx, bx
	57	xchg dx, ax
	58	ALIGN JUMP_ALIGN
	59	.InfoLineLoop:
	60	shr dl, 1
	61	jnc SHORT .CheckNextFlag
	62	mov si, [cs:bx+.rgszInfoStringLookup]
	63	push bx
	64	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromCSSI
	65	pop bx
	66	ALIGN JUMP_ALIGN
	67	.CheckNextFlag:
	68	inc bx
	69	inc bx
	70	loop .InfoLineLoop
	71	stc ; Event processed
	72	ret
	73
	74
[53]	75	ALIGN JUMP_ALIGN
	76	.RefreshItemFromCX:
	77	call LoadItemStringBufferToESDI
	78	mov ax, FILE_STRING_LENGTH
	79	xchg ax, cx
	80	mul cx
	81	add di, ax
	82	mov si, di
	83	mov bx, es
	84	dec cx ; Do not print LF at the end of file string
	85	CALL_DISPLAY_LIBRARY PrintCharBufferFromBXSIwithLengthInCX
	86	stc
	87	ret
	88
	89
[41]	90	ALIGN WORD_ALIGN
	91	.rgszInfoStringLookup:
	92	dw g_szChangeDrive
	93	dw g_szSelectDirectory
	94	dw g_szCreateNew
	95
	96	.rgfnEventHandlers:
	97	istruc MENUEVENT
	98	at MENUEVENT.InitializeMenuinitFromDSSI, dw InitializeMenuinitFromSSBP
[58]	99	at MENUEVENT.ExitMenu, dw Dialog_EventExitMenu
[41]	100	at MENUEVENT.IdleProcessing, dw Dialog_EventNotHandled
	101	at MENUEVENT.ItemHighlightedFromCX, dw Dialog_EventNotHandled
	102	at MENUEVENT.ItemSelectedFromCX, dw .ItemSelectedFromCX
	103	at MENUEVENT.KeyStrokeInAX, dw HandleFunctionKeyFromAH
	104	at MENUEVENT.RefreshTitle, dw Dialog_EventRefreshTitle
	105	at MENUEVENT.RefreshInformation, dw .RefreshInformation
[53]	106	at MENUEVENT.RefreshItemFromCX, dw .RefreshItemFromCX
[41]	107	iend
	108
	109
	110	;--------------------------------------------------------------------
[54]	111	; ReInitializeMenuinitFromSSBP
[41]	112	; InitializeMenuinitFromSSBP
	113	; Parameters:
	114	; SS:BP: Ptr to DIALOG
	115	; Returns:
	116	; Nothing
	117	; Corrupts registers:
	118	; All, except BP
	119	;--------------------------------------------------------------------
	120	ALIGN JUMP_ALIGN
[54]	121	ReInitializeMenuinitFromSSBP:
	122	call DisplayLoadingMessageInInformationArea
[41]	123	InitializeMenuinitFromSSBP:
	124	call LoadItemStringBufferToESDI
	125	call CreateStringFromCurrentDirectoryContentsToESDI
[46]	126	call LoadItemStringBufferToESDI
	127	call SortDirectoryContentsStringFromESDIwithCountInCX
[53]	128	call RemoveLastLFandTerminateESDIwithNull
[54]	129
[106]	130	call Registers_CopySSBPtoDSSI
[52]	131	xor ax, ax
	132	call Dialog_EventInitializeMenuinitFromDSSIwithHighlightedItemInAX
[41]	133	call GetInfoLinesToCXandDialogFlagsToAX
	134	mov [bp+MENUINIT.bInfoLines], cl
	135	CALL_DISPLAY_LIBRARY GetColumnsToALandRowsToAH
	136	mov [bp+MENUINIT.bHeight], ah ; Always max height
[52]	137	mov WORD [bp+MENU.wFirstVisibleItem], 0
[41]	138	ret
	139
	140
	141	;--------------------------------------------------------------------
	142	; LoadItemStringBufferToESDI
	143	; Parameters:
	144	; SS:BP: Ptr to DIALOG
	145	; Returns:
	146	; ES:DI: Ptr to item string buffer
	147	; Corrupts registers:
	148	; Nothing
	149	;--------------------------------------------------------------------
	150	ALIGN JUMP_ALIGN
	151	LoadItemStringBufferToESDI:
	152	les di, [bp+DIALOG.fpDialogIO]
	153	les di, [es:di+FILE_DIALOG_IO.fszItemBuffer]
	154	ret
	155
	156
	157	;--------------------------------------------------------------------
	158	; CreateStringFromCurrentDirectoryContentsToESDI
	159	; Parameters:
	160	; ES:DI: Buffer where to create item string
	161	; SS:BP: Ptr to DIALOG
	162	; Returns:
[46]	163	; CX: Number of files or directories found
[41]	164	; Corrupts registers:
[53]	165	; AX, BX, DX, SI, DI, DS
[41]	166	;--------------------------------------------------------------------
	167	ALIGN JUMP_ALIGN
	168	CreateStringFromCurrentDirectoryContentsToESDI:
[53]	169	mov bx, di
	170	CALL_DISPLAY_LIBRARY PushDisplayContext
	171	mov cx, -1
	172	CALL_DISPLAY_LIBRARY PrepareOffScreenBufferInESBXwithLengthInCX ; ES:DI now points to buffer
	173
[41]	174	lds si, [bp+DIALOG.fpDialogIO]
	175	eMOVZX cx, BYTE [si+FILE_DIALOG_IO.bFileAttributes]
	176	lds si, [si+FILE_DIALOG_IO.fpFileFilterString]
	177	call Directory_UpdateDTAForFirstMatchForDSSIwithAttributesInCX
[53]	178
[41]	179	call .ClearDLifInRootDirectory
	180	call Directory_GetDiskTransferAreaAddressToDSSI
[46]	181	xor cx, cx ; Clear file/directory count
[53]	182	call .FindMatchingFilesAndPrintThemToOffScreenBuffer
[41]	183
[53]	184	CALL_DISPLAY_LIBRARY PopDisplayContext
	185	ret
[41]	186
	187	;--------------------------------------------------------------------
	188	; .ClearDLifInRootDirectory
	189	; Parameters:
	190	; SS:BP: Ptr to DIALOG
	191	; ES:DI: Ptr to destination string buffer
	192	; Returns:
	193	; DL: Cleared if in root directory
	194	; Set if in any other directory
	195	; Corrupts registers:
	196	; AX, SI, DS
	197	;--------------------------------------------------------------------
	198	ALIGN JUMP_ALIGN
	199	.ClearDLifInRootDirectory:
[106]	200	call Registers_CopyESDItoDSSI
[41]	201	call Directory_WriteCurrentPathToDSSI
	202	mov dl, [si]
	203	ret
	204
	205	;--------------------------------------------------------------------
[53]	206	; .FindMatchingFilesAndPrintThemToOffScreenBuffer
[41]	207	; Parameters:
[53]	208	; CX: Initial directory count
	209	; DL: Zero if root directory selected
	210	; DS:SI: Ptr to DTA with first matching file
[41]	211	; Returns:
[53]	212	; CX: Incremented by number of files/directories found
[41]	213	; Corrupts registers:
[53]	214	; AX, BX, DX, DI, DS
[41]	215	;--------------------------------------------------------------------
	216	ALIGN JUMP_ALIGN
[53]	217	.FindMatchingFilesAndPrintThemToOffScreenBuffer:
	218	call AppendFileFromDTAinDSSItoOffScreenBuffer
	219	call Directory_UpdateDTAForNextMatchUsingPreviousParameters
	220	jnc SHORT .FindMatchingFilesAndPrintThemToOffScreenBuffer
[41]	221	ret
	222
[46]	223
[41]	224	;--------------------------------------------------------------------
[53]	225	; AppendFileFromDTAinDSSItoOffScreenBuffer
[41]	226	; Parameters:
[46]	227	; CX: Files/directores found
[41]	228	; DL: Zero if root directory selected
	229	; DS:SI: Ptr to DTA containing file information
	230	; Returns:
[46]	231	; CX: Incremented by number of files/directories found
[41]	232	; Corrupts registers:
[53]	233	; AX, BX
[41]	234	;--------------------------------------------------------------------
	235	ALIGN JUMP_ALIGN
[53]	236	AppendFileFromDTAinDSSItoOffScreenBuffer:
[41]	237	call .FilterCurrentDirectory ; We never want "."
	238	call .FilterUpDirectoryWhenInRoot ; No ".." when in root directory
[46]	239	inc cx ; Nothing filtered so increment files/directories
[41]	240
	241	push bp
	242	push si
[53]	243	push dx
[46]	244	push cx
[41]	245	call .FormatFileOrDirectoryToBufferFromDTAinDSSI
[46]	246	pop cx
[53]	247	pop dx
[41]	248	pop si
	249	pop bp
	250	ret
	251
	252	;--------------------------------------------------------------------
[53]	253	; .FilterCurrentDirectory
	254	; .FilterUpDirectoryWhenInRoot
	255	; Parameters:
	256	; DL: Zero if root directory selected
	257	; DS:SI: Ptr to DTA containing file information
	258	; Returns:
	259	; Nothing
	260	; Returns from AppendFileToBufferInESDIfromDtaInDSSI when filtering
	261	; Corrupts registers:
	262	; AX
	263	;--------------------------------------------------------------------
	264	ALIGN JUMP_ALIGN
	265	.FilterCurrentDirectory:
	266	cmp WORD [si+DTA.szFile], CURRENTDIR_CHARACTERS
[181]	267	je SHORT .DoFilter
[53]	268	ret
	269
	270	ALIGN JUMP_ALIGN
	271	.FilterUpDirectoryWhenInRoot:
	272	test dl, dl ; Set ZF if root directory selected
	273	jnz SHORT .ReturnWithoutFiltering
	274	cmp WORD [si+DTA.szFile], UPDIR_CHARACTERS
	275	jne SHORT .ReturnWithoutFiltering
[181]	276	.DoFilter:
[53]	277	add sp, BYTE 2 ; Remove return address from stack
	278	ALIGN JUMP_ALIGN, ret
	279	.ReturnWithoutFiltering:
	280	ret
	281
	282	;--------------------------------------------------------------------
[41]	283	; .FormatFileOrDirectoryToBufferFromDTAinDSSI
	284	; Parameters:
	285	; DS:SI: Ptr to DTA containing file information
	286	; Returns:
	287	; Nothing
	288	; Corrupts registers:
	289	; AX, BX, CX, DX, SI, DI, BP
	290	;--------------------------------------------------------------------
	291	ALIGN JUMP_ALIGN
	292	.FormatFileOrDirectoryToBufferFromDTAinDSSI:
	293	mov bp, sp
	294	lea ax, [si+DTA.szFile]
	295
	296	test BYTE [si+DTA.bFileAttributes], FLG_FILEATTR_DIRECTORY
	297	jnz SHORT .FormatDirectory
[46]	298	; Fall to .FormatFile
[41]	299
[46]	300	;--------------------------------------------------------------------
	301	; .FormatFile
	302	; Parameters:
	303	; BP: SP before pushing formatting parameters
	304	; DS:AX: Far pointer to file name
	305	; DS:SI: Ptr to DTA containing file information
	306	; Returns:
	307	; Nothing
	308	; Corrupts registers:
[53]	309	; AX, BX, CX, DX, SI, DI
[46]	310	;--------------------------------------------------------------------
	311	.FormatFile:
	312	xchg si, ax
[53]	313	call String_ConvertDSSItoLowerCase
[46]	314	xchg ax, si
[52]	315
	316	; Push parameters for file name
[53]	317	push ax ; Push file name offset
	318	push ds ; Push file name segment
[46]	319
	320	; Push parameters for file size
[41]	321	mov ax, [si+DTA.dwFileSize]
	322	mov dx, [si+DTA.dwFileSize+2]
	323	xor bx, bx
	324	xor cx, cx
	325	call Size_GetSizeToAXAndCharToDLfromBXDXAXwithMagnitudeInCX
	326	mov cl, 'i'
	327	cmp dl, ' '
	328	eCMOVE cl, dl
	329	push ax
	330	push dx
	331	push cx
[46]	332
	333	; Format to buffer
[41]	334	mov si, g_szFileFormat
	335	jmp SHORT .FormatStringInCSSIandReturn
	336
[46]	337	;--------------------------------------------------------------------
	338	; .FormatDirectory
	339	; Parameters:
	340	; BP: SP before pushing formatting parameters
	341	; DS:AX: Far pointer to directory name
	342	; DS:SI: Ptr to DTA containing file information
	343	; Returns:
	344	; Nothing
	345	; Corrupts registers:
[53]	346	; AX, SI, DI
[46]	347	;--------------------------------------------------------------------
[41]	348	ALIGN JUMP_ALIGN
	349	.FormatDirectory:
[46]	350	push ax ; Push directory name offset
	351	push ds ; Push directory name segment
[41]	352	mov ax, g_szSub
	353	cmp WORD [si+DTA.szFile], UPDIR_CHARACTERS
	354	eCMOVE ax, g_szUp
	355	push ax
	356	mov si, g_szDirectoryFormat
	357	ALIGN JUMP_ALIGN
	358	.FormatStringInCSSIandReturn:
	359	CALL_DISPLAY_LIBRARY FormatNullTerminatedStringFromCSSI
	360	ret
	361
	362
	363	;--------------------------------------------------------------------
[46]	364	; SortDirectoryContentsStringFromESDIwithCountInCX
	365	; Parameters:
	366	; CX: Number of files and directories
	367	; ES:DI: Buffer containing directory contents string
	368	; SS:BP: Ptr to DIALOG
	369	; Returns:
[53]	370	; ES:DI: Ptr to end of directory contents string
[46]	371	; Corrupts registers:
[53]	372	; AX, BX, CX, DX, SI, DS
[46]	373	;--------------------------------------------------------------------
	374	ALIGN JUMP_ALIGN
	375	SortDirectoryContentsStringFromESDIwithCountInCX:
[106]	376	call Registers_CopyESDItoDSSI
[46]	377
[181]	378	; Add directory contents string length to DI
[53]	379	mov ax, FILE_STRING_LENGTH
[181]	380	push ax
[53]	381	mul cx
	382	add di, ax
	383
[181]	384	mov dx, cx
	385	pop cx
	386	mov bx, .FileStringComparator
	387	jmp Sort_ItemsFromDSSIwithCountInDXsizeInCXandComparatorInBX
	388
[46]	389	;--------------------------------------------------------------------
	390	; .FileStringComparator
	391	; Parameters:
	392	; CX: Item size in bytes
	393	; DS:SI: Ptr to first item to compare
	394	; ES:DI: Ptr to second item to compare
	395	; Returns:
[181]	396	; FLAGS: Signed comparison between first and second item
[46]	397	; Corrupts registers:
	398	; Nothing
	399	;--------------------------------------------------------------------
	400	ALIGN JUMP_ALIGN
	401	.FileStringComparator:
	402	push di
	403	push si
	404	push cx
	405	push bx
	406
	407	mov bx, FILE_STRING_LENGTH-2 ; Zero BH
	408	cmp WORD [si], UPDIR_CHARACTERS
	409	je SHORT .ForceValueFromDSSItoBeLess
	410	mov bl, [si+bx]
	411	cmp bl, [es:di+FILE_STRING_LENGTH-2] ; 'B' for files, 'R' for directories
	412	jne SHORT .ForceValueFromDSSItoBeMoreOrLess
	413	repe cmpsb ; Two directories or two files
	414
	415	ALIGN JUMP_ALIGN
	416	.ReturnFromComparison:
	417	pop bx
	418	pop cx
	419	pop si
	420	pop di
	421	ret
	422	ALIGN JUMP_ALIGN
	423	.ForceValueFromDSSItoBeMoreOrLess:
	424	ja SHORT .ForceValueFromDSSItoBeLess ; Directory in SI, file in DI
	425	xchg bl, bh
	426	; Fall to ForceValueFromDSSItoBeLess
	427	ALIGN JUMP_ALIGN
	428	.ForceValueFromDSSItoBeLess:
	429	cmp bh, bl
	430	jmp SHORT .ReturnFromComparison
	431
	432
	433	;--------------------------------------------------------------------
[54]	434	; RemoveLastLFandTerminateESDIwithNull
	435	; Parameters:
	436	; ES:DI: Ptr to end of buffer to terminate
	437	; Returns:
	438	; Nothing
	439	; Corrupts registers:
	440	; AX
	441	;--------------------------------------------------------------------
	442	ALIGN JUMP_ALIGN
	443	RemoveLastLFandTerminateESDIwithNull:
	444	dec di
	445	xor ax, ax
	446	stosb
	447	ret
	448
	449
	450	;--------------------------------------------------------------------
[41]	451	; GetInfoLinesToCXandDialogFlagsToAX
	452	; Parameters:
	453	; SS:BP: Ptr to DIALOG
	454	; Returns:
	455	; AX: Dialog flags
	456	; CX: Number of info lines to be displayed
	457	; Corrupts registers:
	458	; SI, DS
	459	;--------------------------------------------------------------------
	460	ALIGN JUMP_ALIGN
	461	GetInfoLinesToCXandDialogFlagsToAX:
	462	xor ax, ax
	463	call GetDialogFlagsToAL
	464	jmp Bit_GetSetCountToCXfromAX
	465
	466	;--------------------------------------------------------------------
	467	; GetDialogFlagsToAL
	468	; Parameters:
	469	; SS:BP: Ptr to DIALOG
	470	; Returns:
	471	; AL: Dialog flags
	472	; Corrupts registers:
	473	; SI, DS
	474	;--------------------------------------------------------------------
	475	ALIGN JUMP_ALIGN
	476	GetDialogFlagsToAL:
	477	lds si, [bp+DIALOG.fpDialogIO]
	478	mov al, [si+FILE_DIALOG_IO.bDialogFlags]
	479	ret
	480
	481
	482	;--------------------------------------------------------------------
	483	; ParseSelectionFromItemLineInDSSI
	484	; Parameters:
	485	; DS:SI: Ptr to char buffer containing file or directory to be selected
	486	; SS:BP: Ptr to DIALOG
	487	; Returns:
	488	; Nothing
	489	; Corrupts registers:
	490	; All, except BP
	491	;--------------------------------------------------------------------
	492	ALIGN JUMP_ALIGN
	493	ParseSelectionFromItemLineInDSSI:
[46]	494	mov ax, [si]
	495	cmp ax, UPDIR_CHARACTERS
	496	je SHORT .ChangeToUpdir
	497	call Char_IsUpperCaseLetterInAL
	498	jc SHORT .ParseAndChangeToSubdirInDSSI
[141]	499	call Char_IsDecimalDigitInAL
	500	jc SHORT .ParseAndChangeToSubdirInDSSI ; Assume subdir and check for errors
[46]	501	; Fall to .ParseAndSelectFileFromDSSI
[41]	502
	503	;--------------------------------------------------------------------
[46]	504	; .ParseAndSelectFileFromDSSI
[41]	505	; Parameters:
[46]	506	; DS:SI: NULL terminated string selected from dialog
[41]	507	; SS:BP: Ptr to DIALOG
	508	; Returns:
	509	; Nothing (exits dialog)
	510	; Corrupts registers:
	511	; All, except BP
	512	;--------------------------------------------------------------------
[46]	513	.ParseAndSelectFileFromDSSI:
[41]	514	les di, [bp+DIALOG.fpDialogIO]
	515	add di, BYTE FILE_DIALOG_IO.szFile
	516	mov cx, FILENAME_BUFFER_SIZE-1
[50]	517	call Memory_CopyCXbytesFromDSSItoESDI
[41]	518	xor ax, ax
	519	stosb ; Terminate with NULL
[50]	520	jmp SHORT CloseFileDialogAfterSuccessfullSelection
[41]	521
	522	;--------------------------------------------------------------------
[46]	523	; .ChangeToUpdir
[41]	524	; Parameters:
	525	; SS:BP: Ptr to DIALOG
	526	; Returns:
	527	; Nothing
	528	; Corrupts registers:
	529	; All, except BP
	530	;--------------------------------------------------------------------
	531	ALIGN JUMP_ALIGN
[46]	532	.ChangeToUpdir:
[51]	533	push cs
	534	pop ds
[46]	535	mov si, g_szUpdir
	536	jmp SHORT .ChangeDirectoryToDSSI
	537
	538	;--------------------------------------------------------------------
	539	; .ParseAndChangeToSubdirInDSSI
	540	; Parameters:
	541	; DS:SI: NULL terminated string selected from dialog
	542	; SS:BP: Ptr to DIALOG
	543	; Returns:
	544	; Nothing
	545	; Corrupts registers:
	546	; All, except BP
	547	;--------------------------------------------------------------------
	548	ALIGN JUMP_ALIGN
	549	.ParseAndChangeToSubdirInDSSI:
	550	mov BYTE [si+12], NULL ; Terminate with NULL (unnecessary spaces do not matter)
	551	.ChangeDirectoryToDSSI:
[41]	552	call Directory_ChangeToPathFromDSSI
[141]	553	jc SHORT .ParseAndSelectFileFromDSSI ; Must have been a file starting with number
[41]	554	; Fall to RefreshFilesToDisplay
	555
	556	;--------------------------------------------------------------------
	557	; RefreshFilesToDisplay
	558	; Parameters:
	559	; SS:BP: Ptr to DIALOG
	560	; Returns:
	561	; Nothing
	562	; Corrupts registers:
	563	; All, except BP
	564	;--------------------------------------------------------------------
	565	ALIGN JUMP_ALIGN
	566	RefreshFilesToDisplay:
[54]	567	call ReInitializeMenuinitFromSSBP
[41]	568	jmp MenuInit_RefreshMenuWindow
	569
	570
	571	;--------------------------------------------------------------------
	572	; HandleFunctionKeyFromAH
	573	; Parameters:
	574	; AH: Scancode for function key
	575	; SS:BP: Ptr to DIALOG
	576	; Returns:
	577	; Nothing
	578	; Corrupts registers:
	579	; AX, SI, DI, BP
	580	;--------------------------------------------------------------------
	581	ALIGN JUMP_ALIGN
	582	HandleFunctionKeyFromAH:
	583	call GetDialogFlagsToAL
	584	cmp ah, KEY_FILEDIALOG_NEW_FILE_OR_DIR
	585	je SHORT HandleFunctionKeyForCreatingNewFileOrDirectory
	586	cmp ah, KEY_FILEDIALOG_SELECT_DIRECTORY
	587	je SHORT HandleFunctionKeyForSelectingDirectoryInsteadOfFile
	588	cmp ah, KEY_FILEDIALOG_CHANGE_DRIVE
	589	je SHORT HandleFunctionKeyForDriveChange
	590	ReturnWithoutHandlingKeystroke:
	591	clc ; Event not processed
	592	ret
	593
	594
	595	;--------------------------------------------------------------------
	596	; HandleFunctionKeyForCreatingNewFileOrDirectory
	597	; Parameters:
	598	; AL: File dialog flags
	599	; SS:BP: Ptr to DIALOG
	600	; Returns:
	601	; Closes file dialog
	602	; Corrupts registers:
	603	; All, except BP
	604	;--------------------------------------------------------------------
	605	ALIGN JUMP_ALIGN
	606	HandleFunctionKeyForCreatingNewFileOrDirectory:
	607	test al, FLG_FILEDIALOG_NEW
	608	jz SHORT ReturnWithoutHandlingKeystroke
	609
	610	mov cx, STRING_DIALOG_IO_size
	611	call Memory_ReserveCXbytesFromStackToDSSI
	612	call .InitializeStringDialogIoInDSSIforInputtingFileName
	613
	614	CALL_MENU_LIBRARY GetStringWithIoInDSSI
	615	mov al, [si+STRING_DIALOG_IO.bUserCancellation]
	616	add sp, BYTE STRING_DIALOG_IO_size
	617	test al, al ; User cancellation?
	618	jnz SHORT ReturnWithoutHandlingKeystroke
	619	jmp CloseFileDialogAfterSuccessfullSelection
	620
	621	ALIGN JUMP_ALIGN
	622	.InitializeStringDialogIoInDSSIforInputtingFileName:
	623	call InitializeNullStringsToDialogInputInDSSI
	624	mov WORD [si+DIALOG_INPUT.fszTitle], g_szEnterNewFileOrDirectory
	625	mov WORD [si+STRING_DIALOG_IO.fnCharFilter], NULL
	626	mov WORD [si+STRING_DIALOG_IO.wBufferSize], FILENAME_BUFFER_SIZE
	627	les ax, [bp+DIALOG.fpDialogIO]
	628	add ax, BYTE FILE_DIALOG_IO.szFile
	629	mov [si+STRING_DIALOG_IO.fpReturnBuffer], ax
	630	mov [si+STRING_DIALOG_IO.fpReturnBuffer+2], es
	631	ret
	632
	633
	634	;--------------------------------------------------------------------
	635	; HandleFunctionKeyForSelectingDirectoryInsteadOfFile
	636	; Parameters:
	637	; AL: File dialog flags
	638	; SS:BP: Ptr to DIALOG
	639	; Returns:
	640	; Closes file dialog
	641	; Corrupts registers:
	642	; All, except BP
	643	;--------------------------------------------------------------------
	644	ALIGN JUMP_ALIGN
	645	HandleFunctionKeyForSelectingDirectoryInsteadOfFile:
	646	test al, FLG_FILEDIALOG_DIRECTORY
	647	jz SHORT ReturnWithoutHandlingKeystroke
	648	; Fall to CloseFileDialogAfterSuccessfullSelection
	649
	650	;--------------------------------------------------------------------
	651	; CloseFileDialogAfterSuccessfullSelection
	652	; Parameters:
	653	; SS:BP: Ptr to DIALOG
	654	; Returns:
	655	; Nothing (exits dialog)
	656	; Corrupts registers:
	657	; All, except BP
	658	;--------------------------------------------------------------------
	659	ALIGN JUMP_ALIGN
	660	CloseFileDialogAfterSuccessfullSelection:
	661	lds di, [bp+DIALOG.fpDialogIO]
	662	mov BYTE [di+FILE_DIALOG_IO.bUserCancellation], FALSE
	663	jmp MenuInit_CloseMenuWindow
	664
	665
	666	;--------------------------------------------------------------------
	667	; HandleFunctionKeyForDriveChange
	668	; Parameters:
	669	; AL: File dialog flags
	670	; SS:BP: Ptr to DIALOG
	671	; Returns:
	672	; Nothing
	673	; Corrupts registers:
	674	; All, except BP
	675	;--------------------------------------------------------------------
	676	ALIGN JUMP_ALIGN
	677	HandleFunctionKeyForDriveChange:
	678	test al, FLG_FILEDIALOG_DRIVES
	679	jz SHORT ReturnWithoutHandlingKeystroke
	680
[54]	681	call DisplayLoadingMessageInInformationArea
	682	mov cx, DRIVE_DIALOG_IO_size
	683	call Memory_ReserveCXbytesFromStackToDSSI
	684	call .DisplayDriveSelectionDialogWithIoInDSSI
	685	call .ChangeDriveToUserSelectionFromIoInDSSI
	686	add sp, BYTE DRIVE_DIALOG_IO_size
	687	ret
[41]	688
	689	;--------------------------------------------------------------------
[54]	690	; .DisplayDriveSelectionDialogWithIoInDSSI
[41]	691	; Parameters:
[54]	692	; DS:SI: Ptr to uninitialized DRIVE_DIALOG_IO
[41]	693	; SS:BP: Ptr to DIALOG
	694	; Returns:
[54]	695	; DS:SI: Ptr to DRIVE_DIALOG_IO
[41]	696	; Corrupts registers:
[54]	697	; AX, DI
[41]	698	;--------------------------------------------------------------------
	699	ALIGN JUMP_ALIGN
[54]	700	.DisplayDriveSelectionDialogWithIoInDSSI:
[41]	701	call InitializeNullStringsToDialogInputInDSSI
	702	mov WORD [si+DIALOG_INPUT.fszTitle], g_szSelectNewDrive
[54]	703	CALL_MENU_LIBRARY GetDriveWithIoInDSSI
	704	ret
[41]	705
	706	;--------------------------------------------------------------------
[54]	707	; .ChangeDriveToUserSelectionFromIoInDSSI
[41]	708	; Parameters:
[54]	709	; DS:SI: Ptr to DRIVE_DIALOG_IO
[41]	710	; SS:BP: Ptr to DIALOG
	711	; Returns:
	712	; Nothing
	713	; Corrupts registers:
[54]	714	; All, except BP
[41]	715	;--------------------------------------------------------------------
	716	ALIGN JUMP_ALIGN
[54]	717	.ChangeDriveToUserSelectionFromIoInDSSI:
	718	cmp BYTE [si+DRIVE_DIALOG_IO.bUserCancellation], FALSE
	719	jne SHORT .UserCancelledDriveChange
[41]	720
[54]	721	mov dl, [si+DRIVE_DIALOG_IO.bReturnDriveNumber]
	722	call Drive_SetDefaultFromDL
	723	jmp RefreshFilesToDisplay
	724	.UserCancelledDriveChange:
[41]	725	ret
	726
	727
	728	;--------------------------------------------------------------------
[54]	729	; DisplayLoadingMessageInInformationArea
[53]	730	; Parameters:
[54]	731	; SS:BP: Ptr to DIALOG
[53]	732	; Returns:
	733	; Nothing
	734	; Corrupts registers:
[54]	735	; AX, BX, CX, DX, SI, DI
[53]	736	;--------------------------------------------------------------------
	737	ALIGN JUMP_ALIGN
[54]	738	DisplayLoadingMessageInInformationArea:
	739	call MenuText_ClearInformationArea
	740	call MenuText_PrepareToDrawInformationArea
	741	mov si, g_szLoadingPleaseWait
	742	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromCSSI
[53]	743	ret
	744
	745
	746	;--------------------------------------------------------------------
[41]	747	; InitializeNullStringsToDialogInputInDSSI
	748	; Parameters:
	749	; DS:SI: Ptr to DIALOG_INPUT
	750	; SS:BP: Ptr to DIALOG
	751	; Returns:
	752	; Nothing
	753	; Corrupts registers:
	754	; AX
	755	;--------------------------------------------------------------------
	756	ALIGN JUMP_ALIGN
	757	InitializeNullStringsToDialogInputInDSSI:
	758	mov ax, g_szNull
	759	mov [si+DIALOG_INPUT.fszTitle], ax
	760	mov [si+DIALOG_INPUT.fszTitle+2], cs
	761	mov [si+DIALOG_INPUT.fszItems], ax
	762	mov [si+DIALOG_INPUT.fszItems+2], cs
	763	mov [si+DIALOG_INPUT.fszInfo], ax
	764	mov [si+DIALOG_INPUT.fszInfo+2], cs
	765	ret

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