;
;	File:		Balloonptch28.a
;
;	Contains:	Main and Pack14 caller for Help Manager ptch 28
;
;	Written by:	Randy Carr
;
;	Copyright:	© 1989-1990, 1992 by Apple Computer, Inc., all rights reserved.
;
;	Change History (most recent first):
;
;		<38>	  7/8/92	JSM		Move HelpMgrInstall, Pack14Entry, ptchHMUpdateHelpMenu,
;									ptchHMGetHelpGlobal, ptchHMGetBalloons, and ptchHMSetHelpGlobal
;									to BalloonExtensions.a, add comments about patches rolled into
;									DeskMgr.a.
;		<37>	  4/7/92	JSM		Use emPack14Globals instead of emPackGlobals+28.
;		<36>	 2/11/91	RLC		dc,#82023 Fix HiliteMenu(0) bug for the help menu [GO5
;									approved].
;		<35>	 1/18/91	KSM		<RLC> Change include of BalloonPACKEqu to BalloonsPriv.a.
;		<34>	  1/7/91	JDR		(dba) Changing the includes of Icons.a to IconUtilsPriv.a.
;		<33>	12/14/90	RLC		<ksm> Fix patch to _MenuSelect to respect the flags in the help
;									menu. Do this by returning hiword = help menu ID, lowword = item
;									number from call to _SystemMenu only if in the help menu. In
;									this way, the menu flags are respected, because _SystemMenu
;									would never have been called if the item wasn't available.
;	   <31+>	 10/5/90	RLC		<ksm> Toss code that used to be the patch to _InitWindows. Change
;									the patch to _ShowHide to reference the hmgTitleBalloon global
;									instead of the hmgContentWindow global.
;		<31>	 9/30/90	RLC		Change reference from hmgLastWindow to hmgContentWindow to keep
;									the confusion level lower.
;	   <29+>	 9/23/90	RLC		Remove patch to InitWindows as we've relocated the code to
;									allocate the layer & help window when balloon help actually goes
;									on.
;		<29>	 9/13/90	RLC		Change HMGlobals to be a ptr instead of a handle, as it gets
;									allocated at init time (early) and preallocation of a master
;									ptr; Update all references to the hmGlobalHandle to hmGlobalPtr.
;		<28>	 8/31/90	RLC		Match up those equates again, make patch to OSEventAvail not be
;									reentrant for those calls to _StillDown (which calls
;									OSEventAvail).
;	   <26+>	 8/21/90	RLC		Add a patch to OSEventAvail.
;	   <25+>	 8/16/90	RLC		Convert to use PackHelper (Dispatcher) to get good at HLock &
;									HUnlocking package.
;	   <24+>	  8/6/90	RLC		Add code to do InitHelpMenu here instead of ProcessMgr.
;		<24>	 7/18/90	RLC		Fix export of STDEntry & STDExit.
;		<23>	 7/13/90	RLC		Shorten calls to ptchHMGetBalloons to access global directly,
;									add patch to _ShowHide to improve performance to system
;									balloons.
;		<22>	  7/2/90	RLC		Remove normalizing in return from MenuSelect in help menu.
;	   <20+>	 6/26/90	RLC		Shorten some code.
;	   <19+>	 6/14/90	RLC		Add support for first time (“Balloons On”) balloon.
;		<19>	  6/7/90	EMT		Removed IsThisAModalDialog since it's defined in
;									ModalDialogMenuPatches.
;		<18>	  6/7/90	VL		Add HelpMgrInstall. Change patch routines to use linked patch
;									macros. Remove obsolete routines (ptchHMRetrievePatchChain and
;									ptchHMInstallPatches).
;	   <16+>	  6/1/90	RLC		Add a call in HMInitWindowsPatch to retrieve the Help font and
;									size from Script Mgr.
;	   <15+>	 5/29/90	RLC		Fix patch to _AppendMenu to support multiple items from
;									application.
;	   <14+>	  5/4/90	RLC		Try the _Clearmenubar patch again
;		<14>	  5/4/90	RLC		Quik fixes.
;		<14>	  5/4/90	RLC		Shorten some patches.
;		<13>	  5/4/90	RLC		Fix bug in AppendMenu code that doesn't append to help menu.
;		<12>	 4/22/90	dba		fix patch to MenuSelect so it doesn’t return anything when one
;									of Help’s own menus is selected
;	   <10+>	 4/10/90	KSM		Whack out the extraneous patches.
;		<9+>	  4/5/90	RLC		Add new private: HMExtractHelpMsg to generically extract a help
;									msg.
;		<8+>	 3/29/90	RLC		Track appends to help menu correctly during twitches.
;		<7+>	 3/23/90	RLC		something
;		<6+>	 3/19/90	RLC		Change help menu to use Show/Hide strings instead of CheckItem.
;		<5+>	  2/5/90	RLC		Add a patch to _InsertMenu.
;		<4+>	  2/2/90	RLC		Fix selector error code return.
;		<3+>	 1/31/90	RLC		Fix menu hiliting for Help menu.
;		<2+>	 1/30/90	RLC		Fix HiliteMenu(0) condition for mousedowns in HelpMenu.
;		<1+>	 1/12/90	RLC		Fix low memory conditions and bad calling conventions to
;									package.
;	   <1.1>	 11/7/89	RLC		Changed patch to _IsDialogEvent to handle tracking of Help Icon
;									in modaldialogs.
;	   <1.0>	 11/2/89	RLC		Created Today.
;
;						TITLE		'Balloonptch28.a - Help Manager'

	IF &TYPE('HelpMgrTesting')='UNDEFINED' THEN
HelpMgrTesting			EQU 0
	ENDIF

HelpIncludeHelpIcon		EQU	0

			PRINT	PUSH,OFF

			LOAD	'StandardEqu.d'
			INCLUDE 'LinkedPatchMacros.a'			; linked patch stuff
			INCLUDE 'InternalMacros.a'				; darin stuff
			INCLUDE	'BalloonsPriv.a'				; my private help manager equates

			PRINT	POP
;
; Macro to put in debug symbols for MacsBug
;
			IF HelpMgrTesting THEN
			MACRO
				DoDebugSymbols &name
				DC.B	$80 + &LEN(&name), '&name'
				DC.W	$0000
			ENDM
			ENDIF

			ROMs		Plus,SE,II,Portable,IIci

;
;	PROCEDURE HMModalDialogPatch;
;
;	This code is patched in to _ModalDialog trap so that we can track the
;	mouse going down over our Balloon Help Icon in the dialog template handle.
;

HMModalDialogPatch	PatchProc	_ModalDialog
				IMPORT	ptchHMGetBalloons

				JSR		ptchHMGetBalloons			; what is the state of What Is? mode?
				BEQ.S	@BalloonsOff				; no, let's not scan for a content window

				SUBQ	#2,SP						; make space for OsErr
				_HMTrackModalHelpItems
				TST		(SP)+						; toss result
@BalloonsOff
				jmpOld								; jump to next in patch chain

		IF HelpMgrTesting THEN
				DoDebugSymbols	HMModalDialogPatch	; label for MacsBug
		ENDIF

		ENDP			; HMModalDialogPatch

;
;	PROCEDURE HMShowHidePatch;
;
;	This code is patched in to _ShowHide trap so that get better response times
;	when windows come and go.
;
;
HMShowHidePatch	PatchProc	_ShowHide
				IMPORT	ptchHMGetBalloons

				MOVE.L	A1,-(SP)					; we have to save this register (Why?, I don't know)

				JSR		ptchHMGetBalloons			; what is the state of What Is? mode?
				BEQ.S	@BalloonsOff				; EQ means no, so, let's not do anything.

				SUBQ	#2,SP						; room for Boolean
				_HMIsBalloon						; was there a Balloon up?
				TST.B	(SP)+
				BEQ.S	@BalloonsOff				; EQ means no, so, let's exit now

				MOVE.L	ExpandMem,A0						; point to the expand mem ptr
				MOVE.L	ExpandMemRec.emHelpGlobals(A0),A0	; A0 = global ptr

						; note: 10 = 6 + A1 saved on stack
				MOVE.L	10(SP),D0					; get the ShowHide WindowPtr that was passed

				CMP.L	hmgWindow(A0),D0			; was it our balloon window?
				BEQ.S	@BalloonsOff				; yes, ignore _ShowHide calls with the balloon window

				MOVE	hmgTitleBalloon(A0),D0		; see if one of the menu bar title balloons was up (<>0)
				BNE.S	@BalloonsOff				; NE means one was so just exit the patch

				TST.B	8(SP)						; true if the window is becoming active
				BNE.S	@BalloonsOff				; NE means that somebody called ShowHide
													;	to show a currently showing window
@DifferentLastWindow

				SUBQ	#2,SP						; remove any balloons that might have been up
				_HMRemoveBalloon					; do the remove
				ADDQ.L	#2,SP						; toss result
@BalloonsOff
				MOVE.L	(SP)+,A1					; restore the return address that was in A1 (Why?, I don't know)
				jmpOld								; jump to next in patch chain

		IF HelpMgrTesting THEN
				DoDebugSymbols	HMShowHidePatch		; label for MacsBug
		ENDIF

		ENDP			; HMShowHidePatch

;
;	PROCEDURE HMIsDialogEventPatch;
;
;	This code is patched in to _IsDialogEvent trap so that we can track the
;	mouse over each dialog item in a dialog template handle.
;
;
HMIsDialogEventPatch	PatchProc	_IsDialogEvent
				IMPORT	ptchHMGetBalloons

		IF HelpIncludeHelpIcon THEN
				IMPORT	ptchTrackHelpIcon

				JSR		ptchTrackHelpIcon
		ENDIF

				JSR		ptchHMGetBalloons			; what is the state of What Is? mode?
				BEQ.S	@BalloonsOff				; no, let's not scan for a content window

				SUBQ	#2,SP						; make space for OsErr
				_HMTrackModalHelpItems
				TST		(SP)+						; toss result
@BalloonsOff
				jmpOld								; jump to next in patch chain

		IF HelpMgrTesting THEN
				DoDebugSymbols	HMIsDialogEventPatch		; label for MacsBug
		ENDIF

		ENDP			; HMIsDialogEventPatch

;
;
;	PROCEDURE HMSystemTaskPatch;
;
;	This code is patched in to _SystemTask trap so that we can track autocontents
;
;	This patch has been rolled into DeskMgr.a.
;

HMSystemTaskPatch PatchProc _SystemTask
			IMPORT	ptchHMGetBalloons

			JSR		ptchHMGetBalloons			; what is the state of What Is? mode?
			BEQ.S	@BalloonsOff				; no, let's not scan for a content window

			SUBQ	#2,SP						; make room for a dummy OsErr
			_HMBalloonBulk
			ADDQ	#2,SP						; toss result (for now)

@BalloonsOff
			jmpOld								; jump to next in patch chain

		IF HelpMgrTesting THEN
				DoDebugSymbols	HMSystemTaskPatch		; label for MacsBug
		ENDIF

		ENDP					; end of system task patch code
;
;	PROCEDURE HMOSEventAvailPatch;
;
;	This code is patched in to _OSEventAvail trap so that we can track autocontents
;
;
HMOSEventAvailPatch PatchProc _OSEventAvail
			IMPORT	ptchHMGetBalloons
			IMPORT	ptchHMCallTrackerInContext

			MOVEM.L	A0-A1/D0-D2,-(SP)					; we need to save these regs

			MOVE.L	ExpandMem,A0						; point to the expand mem ptr
			MOVE.L	ExpandMemRec.emHelpGlobals(A0),A0	; A0 = global ptr
			TST.B	hmgWhatIs(A0)						; is Balloon help mode on?
			BEQ.S	@DoNothing							; no, let's not scan for a content window

			TST.W	hmgOSEventReentrantCount(A0)		; test the reentrant count
			BNE.S	@DoNothing							; do nothing on the reentrant case

			ST		hmgOSEventReentrantCount(A0)		; say that we're busy
			JSR		ptchHMCallTrackerInContext

@DoNothing
			MOVEM.L	(SP)+,A0-A1/D0-D2					; restore 'em
			jmpOld										; jump to next in patch chain

		IF HelpMgrTesting THEN
				DoDebugSymbols	HMOSEventAvailPatch		; label for MacsBug
		ENDIF

		ENDP					; end of OSEventAvail patch code

;
;	PROCEDURE HMMenuSelectPatch;
;
;	This code is patched in to _MenuSelect trap so that we can track the help menu.
;
;
HMMenuSelectPatch PatchProc _MenuSelect
				IMPORT	ptchHMUpdateHelpMenu
				IMPORT	ptchHMToggleWhatIs
				IMPORT	ptchHMShowHelpAboutDialog

				resultsStackFrame
result			ds.l		1					; the MenuSelect result
				parametersStackFrame
startPt			ds.l		1					; the start point
				endStackFrame

			linkSave A2

			MOVE.L	MenuList,D0					; check if menu list is nil.
			BEQ.S	@CallOldCode				; if NIL just call the old trap

			JSR		ptchHMUpdateHelpMenu		; update the menu checked status

			MOVE.L	ExpandMem,A2						; <33> point to the expand mem ptr
			MOVE.L	ExpandMemRec.emHelpGlobals(A2),A2	; <33> A2 = global ptr
			CLR.W	hmgSystemMenuID(A2)			; <33> clear the last system menu ID
			CLR.W	hmgSystemMenuItem(A2)		; <33> clear the last system menu item
			ST		hmgInMenuSelectFlag(A2)		; <33> say that we're in MenuSelect
@CallOldCode
			SUBQ	#4,SP						; room for MenuSelect longInt result
			MOVE.L	startPt(A6),-(SP)			; copy then startPt parameter
			jsrOld								; call next in patch chain

			MOVE.L	(SP)+,D0					; get the result of the _MenuSelect call

			SWAP	D0							; put menu ID in low word for test
			TST.W	D0							; was the menu ID non-zero?
			BNE.S	@NormalMenuSelect			; yes, so just return result of _MenuSelect

			MOVE.W	hmgSystemMenuID(A2),D1		; return the last system menu ID
			BEQ.S	@NormalMenuSelect			; if zero then the menu wasn't the help menu

			SWAP	D1							; put menu ID in hiword
			MOVE.W	hmgSystemMenuItem(A2),D1	; return the last help menu item

@HandleHelpMenu
			CMP		#kHMAboutHelpItem,D1		; was it the about item
			BNE.S	@TryShowBalloonsItem		; no, check for Show/Hide Balloons item

			JSR		ptchHMShowHelpAboutDialog	; show the about dialog
			BRA.S	@HelpMenuHandled			; exit w/ zeroed menu result long

@TryShowBalloonsItem
			CMP.W	#kHMShowBalloonsItem,D1		; was the selection Show/Hide Balloons??
			BNE.S	@DoneHelpMenu				; no, it was some other item

			JSR		ptchHMToggleWhatIs			; toggles state of "Show Balloons" global,
			BRA.S	@HelpMenuHandled			; exit w/ zeroed menu result long

@DoneHelpMenu
			MOVE.L	D1,D0						; put the setup menu result in D0 for result(A6)
			BRA.S	@CorrectedResult			; exit

@HelpMenuHandled
			MOVEQ	#0,D0						; say that hi and lo words are zero
@NormalMenuSelect
			SWAP	D0							; put item number back in lo word
@CorrectedResult
			MOVE.L	D0,result(A6)				; stuff the non-corrected result

			CLR.W	hmgInMenuSelectFlag(A2)		; <33> say that we're out of MenuSelect

			restoreUnlinkReturn

		IF HelpMgrTesting THEN
				DoDebugSymbols	HMMenuSelectPatch		; label for MacsBug
		ENDIF

		ENDP
;
;
;	PROCEDURE HMSystemMenuPatch;
;
;	This code is patched in to _SystemMenu trap so that we can track the help menu.
;
;	This patch has been rolled into DeskMgr.a.
;
HMSystemMenuPatch PatchProc _SystemMenu

			MOVE.L	4(SP),D0							; get menuResult in D0

			SWAP	D0									; put the menu ID in the lower word
			CMP.W	#kHMHelpMenuID,D0					; is it our help menu ID?
			BNE.S	@HelpMenuHandled					; no, just return to _SystemMenu chain

			MOVE.L	ExpandMem,A0						; point to the expand mem ptr
			MOVE.L	ExpandMemRec.emHelpGlobals(A0),A0	; A0 = global ptr

			MOVE.W	#kHMHelpMenuID,hmgSystemMenuID(A0)	; set the global system menu ID to our help menu ID

			SWAP	D0									; fix menuResult, so the item is in low word
			MOVE.W	D0,hmgSystemMenuItem(A0)			;	and put the item into our system menu item global
			
			CLR.W	-(SP)								; <36> (#82023) do a HiliteMenu(0); for apps that only call this
			_HiliteMenu									;	for their own menus [Nisus, Quicken, Adobe apps, etc.]

@HelpMenuHandled
			jmpOld										; jump to next in patch chain

		IF HelpMgrTesting THEN
			DoDebugSymbols	HMSystemMenuPatch			; label for MacsBug
		ENDIF

		ENDP
;
;
;	PROCEDURE HMClearMenuBarPatch;
;
;	This code is patched in to _ClearMenuBar trap so that we always hide balloons on launches & mbar switches
;
;
HMClearMenuBarPatch PatchProc _ClearMenuBar
			IMPORT	ptchHMGetBalloons

			JSR		ptchHMGetBalloons					; what is the state of What Is? mode?
			BEQ.S	@BalloonsOff						; EQ means no, so, let's not do anything.

			SUBQ	#2,SP								; remove any balloons that might have been up
			_HMRemoveBalloon							; do the remove
			TST.W	(SP)+								; toss result

@BalloonsOff
			jmpOld										; jump to next in patch chain


		IF HelpMgrTesting THEN
				DoDebugSymbols	HMClearMenuBarPatch		; label for MacsBug
		ENDIF

		ENDP


			END