DIRECTORY ClassIncreek USING [Increek], Cursors USING [CursorType, SetCursor], Graphics USING [black, Context, DrawBox, NewContext, SetColor, SetCP, white], GraphicsOps USING [DrawText], ImplErrors, InputFocus, Interminal USING [terminal], KeyboardFace USING [DownUp], MessageWindow USING [Append, Blink, messageWindow], Process USING [GetPriority, MsecToTicks, Pause, Priority, priorityForeground, SetPriority], Rope USING [ROPE], TIPUser USING [DiscardTypeAhead], UserProfile USING [Boolean, CallWhenProfileChanges, ProfileChangedProc], Terminal USING [BlinkBWDisplay, GetKeys], ViewerClasses USING [Viewer], ViewerOps USING [EnumerateViewers, EnumProc, PaintViewer, SaveAllEdits, XYWH2Box], --ViewersSnapshot USING [RollBack], WindowManager USING [RestoreCursor]; ImplErrorsImpl: CEDAR MONITOR IMPORTS Cursors, Graphics, GraphicsOps, InputFocus, Interminal, MessageWindow, Process, TIPUser, UserProfile, Terminal, ViewerOps, --ViewersSnapshot,-- WindowManager EXPORTS ImplErrors SHARES InputFocus, MessageWindow, TIPUser = BEGIN OPEN ImplErrors; Error: PUBLIC SIGNAL [severity: Severity _ fatal, msg: Rope.ROPE _ NIL] = CODE; UserErrorQuery: PUBLIC ENTRY PROC RETURNS [continue: BOOL] = TRUSTED BEGIN OPEN Graphics, MessageWindow.messageWindow; ENABLE UNWIND => NULL; oldPriority: Process.Priority = Process.GetPriority[]; context: Context; IF ~worldSwapDebug THEN RETURN[FALSE]; Process.SetPriority[Process.priorityForeground]; TIPUser.DiscardTypeAhead[InputFocus.focusTIP]; context _ NewContext[]; SetColor[context, white]; DrawBox[context, ViewerOps.XYWH2Box[cx, cy, cw, ch]]; SetColor[context, black]; SetCP[context, cx+2, cy+2]; THROUGH [0..3) DO Interminal.terminal.BlinkBWDisplay[]; Process.Pause[Process.MsecToTicks[100]]; ENDLOOP; GraphicsOps.DrawText[context, " Uncaught Signal! Red: Proceed, Yellow: Save edits then rollback, Blue: Reject."]; WHILE Interminal.terminal.GetKeys[][Red] = down OR Interminal.terminal.GetKeys[][Yellow] = down OR Interminal.terminal.GetKeys[][Blue] = down DO ENDLOOP; -- spin until buttons go up Cursors.SetCursor[questionMark]; DO IF Interminal.terminal.GetKeys[][Red] = down THEN { continue _ TRUE; MessageWindow.Append["Pressing on in spite of crash! Maybe you should boot.", TRUE]; EXIT} ELSE IF Interminal.terminal.GetKeys[][Yellow] = down THEN { continue _ TRUE; Cursors.SetCursor[hourGlass]; ViewerOps.SaveAllEdits[! ANY => CONTINUE]; Cursors.SetCursor[retry]; --ViewersSnapshot.RollBack[! ANY => CONTINUE]; usually no return MessageWindow.Append["Rollback failed! Maybe you should boot.", TRUE]; ViewerOps.EnumerateViewers[Paint]; -- update headers of saved viewers EXIT} ELSE IF Interminal.terminal.GetKeys[][Blue] = down THEN {continue _ FALSE; EXIT}; ENDLOOP; InputFocus.EnableInput[]; Process.SetPriority[oldPriority]; IF NOT continue THEN RETURN; WindowManager.RestoreCursor[]; MessageWindow.Blink[]; END; Paint: ViewerOps.EnumProc = BEGIN IF v.column#static THEN ViewerOps.PaintViewer[v, caption ! ANY => CONTINUE]; RETURN[TRUE]; END; worldSwapDebug: BOOL; Init: UserProfile.ProfileChangedProc = CHECKED {worldSwapDebug _ UserProfile.Boolean["WorldSwapDebug", FALSE]}; UserProfile.CallWhenProfileChanges[Init]; END. 0ImplErrorsImpl.mesa; Last Edited by McGregor, November 8, 1982 1:33 pm Last Edited by: Maxwell, January 3, 1983 12:56 pm Last Edited by: Paul Rovner, June 16, 1983 8:51 am try to flush current TIP notification to client only use low-level interfaces to avoid monitors and potentially broken code Κ‡– "Mesa" style˜JšΟc™Jš1™1J™1J™2J˜šΟk ˜ Jšœ žœ ˜Jšœžœ˜&Jšœ žœ?˜MJšœ žœ ˜J˜ J˜ Jšœ žœ ˜Jšœ žœ ˜Jšœžœ ˜3šœžœ@˜MJ˜ —Jšœžœžœ˜Jšœžœ˜!Jšœ žœ7˜HJšœ žœ˜)Jšœžœ ˜Jšœ žœC˜RJšœžœ ˜#Jšœžœ˜$J˜—šœž ˜šžœY˜`JšœD˜D—Jšžœ ˜Jšžœ%˜+J˜—Jšžœžœ ˜J˜Jš œžœžœ(žœžœžœ˜OJ˜š Οnœžœžœžœžœ žœ˜