; File name		:	MenuEvents.asm
; Project name	:	XTIDE Universal BIOS Configurator v2
; Created date	:	5.10.2010
; Last update	:	6.10.2010
; Author		:	Tomi Tilli
; Description	:	Menu event handling.

; Section containing code
SECTION .text

;--------------------------------------------------------------------
; MenuEvents_DisplayMenu
;	Parameters:
;		Nothing
;	Returns:
;		Nothing
;	Corrupts registers:
;		All, except segments
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
MenuEvents_DisplayMenu:
	mov		ax, g_MenupageForMainMenu
	mov		dx, ds
	mov		bx, MenuEventHandler
	CALL_MENU_LIBRARY DisplayWithHandlerInBXandUserDataInDXAX
	ret


;--------------------------------------------------------------------
; MenuEventHandler
;	Common parameters for all events:
;		BX:			Menu event (anything from MENUEVENT struct)
;		SS:BP:		Menu library handle
;	Common return values for all events:
;		CF:			Set if event processed
;					Cleared if event not processed
;	Corrupts registers:
;		All
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
MenuEventHandler:
	cmp		bx, MENUEVENT.RefreshItemFromCX	; Above last supported item?
	ja		SHORT .EventNotHandled
	jmp		[bx+.rgfnEventSpecificHandlers]
.EventNotHandled:
.IdleProcessing:
	clc
	ret

ALIGN WORD_ALIGN
.rgfnEventSpecificHandlers:
	dw		.InitializeMenuinitFromDSSI
	dw		.ExitMenu
	dw		.IdleProcessing
	dw		.ItemHighlightedFromCX
	dw		.ItemSelectedFromCX
	dw		.KeyStrokeInAX
	dw		.RefreshTitle
	dw		.RefreshInformation
	dw		.RefreshItemFromCX


; Parameters:
;	DS:SI:		Ptr to MENUINIT struct to initialize
; Returns:
;	DS:SI:		Ptr to initialized MENUINIT struct
ALIGN JUMP_ALIGN
.InitializeMenuinitFromDSSI:
	push	ds
	push	cs
	pop		ds
	mov		di, g_MenupageForMainMenu
	call	Menupage_SetActiveMenupageFromDSDI
	call	Menupage_GetVisibleMenuitemsToAXfromDSDI
	pop		ds

	mov		WORD [si+MENUINIT.wTimeoutTicks], NO_TIMEOUT_USED
	mov		WORD [si+MENUINIT.wItems], ax
	mov		WORD [si+MENUINIT.bTitleLines], TITLE_LINES_IN_MENU
	mov		WORD [si+MENUINIT.bInfoLines], INFO_LINES_IN_MENU
	mov		WORD [si+MENUINIT.bWidth], MENU_WIDTH
	CALL_DISPLAY_LIBRARY GetColumnsToALandRowsToAH
	mov		[si+MENUINIT.bHeight], ah
	stc
	ret


; Parameters:
;	None
ALIGN JUMP_ALIGN
.ExitMenu:
	stc
	ret


; Parameters:
;	CX:			Index of new highlighted item
;	DX:			Index of previously highlighted item or NO_ITEM_HIGHLIGHTED
ALIGN JUMP_ALIGN
.ItemHighlightedFromCX:
	CALL_MENU_LIBRARY ClearInformationArea
	CALL_MENU_LIBRARY RefreshInformation
	stc
	ret


; Parameters:
;	CX:			Index of selected item
ALIGN JUMP_ALIGN
.ItemSelectedFromCX:
	call	Menupage_GetActiveMenupageToDSDI
	call	Menupage_GetCXthVisibleMenuitemToDSSIfromDSDI
	call	[si+MENUITEM.fnActivate]
	stc
	ret


; Parameters:
;	AL:			ASCII character for the key
;	AH:			Keyboard library scan code for the key
ALIGN JUMP_ALIGN
.KeyStrokeInAX:
	cmp		ah, KEY_DISPLAY_ITEM_HELP
	jne		SHORT .EventNotHandled

	call	Menupage_GetActiveMenupageToDSDI
	CALL_MENU_LIBRARY GetHighlightedItemToAX
	xchg	cx, ax
	call	Menupage_GetCXthVisibleMenuitemToDSSIfromDSDI
	call	Menuitem_DisplayHelpMessageFromDSSI
	stc
	ret


; Parameters:
;	CX:			Index of item to refresh
;	Cursor has been positioned to the beginning of item line
ALIGN JUMP_ALIGN
.RefreshItemFromCX:
	cmp		cx, NO_ITEM_HIGHLIGHTED
	je		SHORT .NothingToRefresh
	call	Menupage_GetActiveMenupageToDSDI
	call	Menupage_GetCXthVisibleMenuitemToDSSIfromDSDI
	jnc		SHORT .NothingToRefresh
	call	MenuitemPrint_NameWithPossibleValueFromDSSI
.NothingToRefresh:
	stc
	ret


; Parameters:
;	CX:			Index of highlighted item
;	Cursor has been positioned to the beginning of first line
ALIGN JUMP_ALIGN
.RefreshInformation:
	cmp		cx, NO_ITEM_HIGHLIGHTED
	je		SHORT .NothingToRefresh
	call	Menupage_GetActiveMenupageToDSDI
	call	Menupage_GetCXthVisibleMenuitemToDSSIfromDSDI
	call	MenuitemPrint_PrintQuickInfoFromDSSI
	stc
	ret


; Parameters:
;	CX:			Index of highlighted item
;	Cursor has been positioned to the beginning of first line
ALIGN JUMP_ALIGN
.RefreshTitle:
	call	.PrintProgramName
	call	.PrintLoadStatus
	call	.PrintStatusOfUnsavedChanges
	stc
	ret

ALIGN JUMP_ALIGN
.PrintProgramName:
	mov		si, g_szProgramTitle
	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromCSSI
	ret

ALIGN JUMP_ALIGN
.PrintLoadStatus:
	mov		ax, [g_cfgVars+CFGVARS.wFlags]
	test	ax, FLG_CFGVARS_FILELOADED
	jnz		SHORT .PrintNameOfLoadedFile
	test	ax, FLG_CFGVARS_ROMLOADED
	jnz		SHORT .PrintLoadedEeprom
	; Fall to .PrintNothingLoaded

.PrintNothingLoaded:
	mov		si, g_szBiosIsNotLoaded
	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromCSSI
	ret

ALIGN JUMP_ALIGN
.PrintNameOfLoadedFile:
	mov		si, g_cfgVars+CFGVARS.szOpenedFile
	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromCSSI
	jmp		SHORT .PrintTypeOfLoadedBios

ALIGN JUMP_ALIGN
.PrintLoadedEeprom:
	mov		si, g_szEEPROM
	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromCSSI
	; Fall to .PrintTypeOfLoadedBios

ALIGN JUMP_ALIGN
.PrintTypeOfLoadedBios:
	mov		si, g_szSourceAndTypeSeparator
	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromCSSI
	call	Buffers_IsXtideUniversalBiosLoaded
	jne		SHORT .PrintUnidentifiedType

	call	Buffers_GetFileBufferToESDI
	mov		bx, es
	lea		si, [di+ROMVARS.szVersion]
	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromBXSI
	ret

ALIGN JUMP_ALIGN
.PrintUnidentifiedType:
	mov		si, g_szUnidentified
	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromCSSI
	ret

ALIGN JUMP_ALIGN
.PrintStatusOfUnsavedChanges:
	test	WORD [g_cfgVars+CFGVARS.wFlags], FLG_CFGVARS_UNSAVED
	jz		SHORT .ReturnSinceNothingToPrint
	mov		si, g_szUnsaved
	CALL_DISPLAY_LIBRARY PrintNullTerminatedStringFromCSSI
.ReturnSinceNothingToPrint:
	ret