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77 lines
2.7 KiB
Plaintext
77 lines
2.7 KiB
Plaintext
;
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; File: MenuMgrExtensions.a
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;
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; Contains: New Menu manager routines (stolen from InvalMenuBarPatch.a)
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;
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; Written by: Tim Nichols
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;
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; Copyright: © 1990, 1992 by Apple Computer, Inc., all rights reserved.
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;
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; This file is used in these builds: BigBang
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;
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; Change History (most recent first):
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;
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; <1> 5/20/92 TN first checked in
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;
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; To Do:
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;
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load 'StandardEqu.d'
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include 'LinkedPatchMacros.a'
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include 'MenuMgrPriv.a'
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;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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; InvalMenuBar
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; Set the low memory bit
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InvalMenuBar PatchProc _InvalMenuBar,(Plus,SE,II,Portable,IIci)
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bset #MenuBarInvalidBit,MenuBarInvalidByte ; set the invalid bit
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rts
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EndProc
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;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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; ValidateMenuBar is the routine that draws the menu bar only if necessary (local or global dirty bit set)
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;
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; Note that the Process Mgr will not let the _DrawMenuBar through if weÕre not the frontmost process.
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;
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; For the local dirty bit, we donÕt care, since weÕll get redrawn anyway when we come to the front. This
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; means we can clear it here to eliminate multiple calls to _DrawMenuBar that wonÕt do anything.
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;
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; However, we want to only test (not clear) the global dirty bit here, which is set by DrawMBARString, since
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; we want to make sure the menu bar gets redrawn eventually no matter which app is at the front.
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;
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; To avoid problems where apps patch any of DrawMenuBar, HiliteMenu, MenuSelect (i.e., the routines
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; herein that utilize ValidateMenuBar) and recurse forever trying to validate the menu bar, we
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; use a semaphore. (THINK Pascal 3.0 was our orignal culprit.) Note the InstallProc below to
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; initialize the semaphore to zero (meaning we are not in ValidateMenuBar).
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InitValidateMenuBarSemaphore InstallProc (Plus,SE,II,Portable,IIci) ; <7>
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bclr #ValidateMenuBarSemaphoreBit,ValidateMenuBarSemaphoreByte ; clear semaphore at startup
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rts
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EndProc
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ValidateMenuBar Proc EXPORT
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bset #ValidateMenuBarSemaphoreBit,ValidateMenuBarSemaphoreByte ; Check and set semaphore <7>
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bnz.s @dontRecurse ; If set, then do nothing. <7>
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bclr #MenuBarInvalidBit,MenuBarInvalidByte ; clear the local invalid bit
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bnz.s @dirty ; draw menu bar if set <6>
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btst #MenuBarGlobalInvalidBit,MenuBarGlobalInvalidByte ; check the global invalid bit <6>
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bz.s @notDirty ; exit if not set <6>
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@dirty
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_DrawMenuBar
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@notDirty
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bclr #ValidateMenuBarSemaphoreBit,ValidateMenuBarSemaphoreByte ; Clear semaphore at exit <7>
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@dontRecurse
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rts
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EndProc
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;ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
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END |