ðQSyntax10.Scn.FntVSyntax10b.Scn.Fnt c ­  àsÅSyntax10i.Scn.Fnt<W[BA@ Dú/“6w¨0MODULE Oberon; (* JG 6.9.90 / RC 18.7.91 / mmb / MH 9.6.94*) IMPORT Kernel, Modules, Input, Win32, Display, Fonts, Viewers, Texts, S := SYSTEM; CONST (*message ids*) consume* = 0; track* = 1; defocus* = 0; neutralize* = 1; mark* = 2; BasicCycle = 20; ESC = 1BX; SETUP = 0A4X; TYPE Painter* = PROCEDURE (x, y: INTEGER); Marker* = RECORD Fade*, Draw*: Painter END ; Cursor* = RECORD marker*: Marker; on*: BOOLEAN; X*, Y*: INTEGER END ; ParList* = POINTER TO ParRec; ParRec* = RECORD vwr*: Viewers.Viewer; frame*: Display.Frame; text*: Texts.Text; pos*: LONGINT END ; InputMsg* = RECORD (Display.FrameMsg) id*: INTEGER; keys*: SET; X*, Y*: INTEGER; ch*: CHAR; fnt*: Fonts.Font; col*, voff*: SHORTINT END ; SelectionMsg* = RECORD (Display.FrameMsg) time*: LONGINT; text*: Texts.Text; beg*, end*: LONGINT END ; ControlMsg* = RECORD (Display.FrameMsg) id*, X*, Y*: INTEGER END ; CopyOverMsg* = RECORD (Display.FrameMsg) text*: Texts.Text; beg*, end*: LONGINT END ; CopyMsg* = RECORD (Display.FrameMsg) F*: Display.Frame END ; Task* = POINTER TO TaskDesc; Handler* = PROCEDURE; TaskDesc* = RECORD next: Task; safe*: BOOLEAN; removed: BOOLEAN; time*: LONGINT; handle*: Handler END ; VAR User*: ARRAY 8 OF CHAR; Password*: LONGINT; Arrow*, Star*: Marker; Mouse*, Pointer*: Cursor; FocusViewer*: Viewers.Viewer; Log*: Texts.Text; Par*: ParList; (*actual parameters*) CurTask*, PrevTask, FirstTask: Task; (* << RC *) CurFnt*: Fonts.Font; CurCol*, CurOff*: SHORTINT; DW, DH, CL, H0, H1, H2, H3: INTEGER; unitW: INTEGER; ActCnt: INTEGER; (*action count for GC*) Mod: Modules.Module; ArrowFade: Painter; (* << mmb 5.12.91 *) opt: ARRAY 32 OF CHAR; dummy: LONGINT; (*user identification*) PROCEDURE Code(VAR s: ARRAY OF CHAR): LONGINT; VAR i: INTEGER; a, b, c: LONGINT; BEGIN a := 0; b := 0; i := 0; WHILE s[i] # 0X DO c := b; b := a; a := (c MOD 509 + 1) * 127 + ORD(s[i]); INC(i) END ; IF b >= 32768 THEN b := b - 65536 END ; RETURN b * 65536 + a END Code; PROCEDURE SetUser* (VAR user, password: ARRAY OF CHAR); BEGIN COPY(user, User); Password := Code(password) END SetUser; (*clocks*) PROCEDURE GetClock* (VAR t, d: LONGINT); BEGIN Kernel.GetClock(t, d) END GetClock; PROCEDURE SetClock* (t, d: LONGINT); BEGIN Kernel.SetClock(t, d) END SetClock; PROCEDURE Time* (): LONGINT; BEGIN RETURN Input.Time() END Time; (*cursor handling*) PROCEDURE FlipArrow (X, Y: INTEGER); (* Windows cursor is used instead *) END FlipArrow; PROCEDURE DrawArrow (X, Y: INTEGER); BEGIN IF X < CL THEN FlipArrow(X, Y) END END DrawArrow; PROCEDURE FadeArrow (X, Y: INTEGER); BEGIN IF X < CL THEN FlipArrow(X, Y) END END FadeArrow; PROCEDURE FlipStar (X, Y: INTEGER); BEGIN Display.CopyPattern(Display.white, Display.star, X - 7, Y - 7, 2) END FlipStar; PROCEDURE OpenCursor* (VAR c: Cursor); BEGIN c.on := FALSE; c.X := 0; c.Y := 0 END OpenCursor; PROCEDURE FadeCursor* (VAR c: Cursor); BEGIN IF c.on THEN c.marker.Fade(c.X, c.Y); c.on := FALSE END END FadeCursor; PROCEDURE DrawCursor* (VAR c: Cursor; VAR m: Marker; X, Y: INTEGER); BEGIN IF c.on & ((X # c.X) OR (Y # c.Y) OR (m.Draw # c.marker.Draw)) THEN c.marker.Fade(c.X, c.Y); c.on := FALSE END ; IF c.marker.Fade = ArrowFade THEN IF m.Fade # ArrowFade THEN dummy := Win32.ShowCursor(0 (*FALSE*)) END ; ELSE IF (c.marker.Fade # NIL) & (m.Fade = ArrowFade) THEN dummy := Win32.ShowCursor(1 (*TRUE*)) END ; END ; IF ~c.on THEN m.Draw(X, Y); c.marker := m; c.X := X; c.Y := Y; c.on := TRUE END END DrawCursor; (*display management*) PROCEDURE RemoveMarks* (X, Y, W, H: INTEGER); BEGIN IF (Mouse.X > X - 16) & (Mouse.X < X + W + 16) & (Mouse.Y > Y - 16) & (Mouse.Y < Y + H + 16) THEN FadeCursor(Mouse) END ; IF (Pointer.X > X - 8) & (Pointer.X < X + W + 8) & (Pointer.Y > Y - 8) & (Pointer.Y < Y + H + 8) THEN FadeCursor(Pointer) END END RemoveMarks; PROCEDURE HandleFiller (V: Display.Frame; VAR M: Display.FrameMsg); BEGIN WITH V: Viewers.Viewer DO IF M IS InputMsg THEN WITH M: InputMsg DO IF M.id = track THEN DrawCursor(Mouse, Arrow, M.X, M.Y) END END ; ELSIF M IS ControlMsg THEN WITH M: ControlMsg DO IF M.id = mark THEN DrawCursor(Pointer, Star, M.X, M.Y) END END ELSIF M IS Viewers.ViewerMsg THEN WITH M: Viewers.ViewerMsg DO IF (M.id = Viewers.restore) & (V.W > 0) & (V.H > 0) THEN RemoveMarks(V.X, V.Y, V.W, V.H); Display.ReplConst(Display.black, V.X, V.Y, V.W, V.H, 0) ELSIF (M.id = Viewers.modify) & (M.Y < V.Y) THEN RemoveMarks(V.X, M.Y, V.W, V.Y - M.Y); Display.ReplConst(Display.black, V.X, M.Y, V.W, V.Y - M.Y, 0) END END END END END HandleFiller; PROCEDURE OpenDisplay* (UW, SW, H: INTEGER); VAR Filler: Viewers.Viewer; BEGIN Input.SetMouseLimits(Viewers.curW + UW + SW, H); Display.ReplConst(Display.black, Viewers.curW, 0, UW + SW, H, 0); NEW(Filler); Filler.handle := HandleFiller; Viewers.InitTrack(UW, H, Filler); (*init user track*) NEW(Filler); Filler.handle := HandleFiller; Viewers.InitTrack(SW, H, Filler) (*init system track*) END OpenDisplay; PROCEDURE DisplayWidth* (X: INTEGER): INTEGER; BEGIN RETURN DW END DisplayWidth; PROCEDURE DisplayHeight* (X: INTEGER): INTEGER; BEGIN RETURN DH END DisplayHeight; PROCEDURE OpenTrack* (X, W: INTEGER); VAR Filler: Viewers.Viewer; BEGIN NEW(Filler); Filler.handle := HandleFiller; Viewers.OpenTrack(X, W, Filler) END OpenTrack; PROCEDURE UserTrack* (X: INTEGER): INTEGER; BEGIN RETURN X DIV DW * DW END UserTrack; PROCEDURE SystemTrack* (X: INTEGER): INTEGER; BEGIN RETURN X DIV DW * DW + DW DIV 8 * 5 END SystemTrack; PROCEDURE UY (X: INTEGER): INTEGER; VAR fil, bot, alt, max: Display.Frame; BEGIN Viewers.Locate(X, 0, fil, bot, alt, max); IF fil.H >= DH DIV 8 THEN RETURN DH END ; RETURN max.Y + max.H DIV 2 END UY; PROCEDURE AllocateUserViewer* (DX: INTEGER; VAR X, Y: INTEGER); BEGIN IF Pointer.on THEN X := Pointer.X; Y := Pointer.Y ELSE X := DX DIV DW * DW; Y := UY(X) END END AllocateUserViewer; PROCEDURE SY (X: INTEGER): INTEGER; VAR fil, bot, alt, max: Display.Frame; BEGIN Viewers.Locate(X, DH, fil, bot, alt, max); IF fil.H >= DH DIV 8 THEN RETURN DH END ; IF max.H >= DH - H0 THEN RETURN max.Y + H3 END ; IF max.H >= H3 - H0 THEN RETURN max.Y + H2 END ; IF max.H >= H2 - H0 THEN RETURN max.Y + H1 END ; IF max # bot THEN RETURN max.Y + max.H DIV 2 END ; IF bot.H >= H1 THEN RETURN bot.H DIV 2 END ; RETURN alt.Y + alt.H DIV 2 END SY; PROCEDURE AllocateSystemViewer* (DX: INTEGER; VAR X, Y: INTEGER); BEGIN IF Pointer.on THEN X := Pointer.X; Y := Pointer.Y ELSE X := DX DIV DW * DW + DW DIV 8 * 5; Y := SY(X) END END AllocateSystemViewer; PROCEDURE MarkedViewer* (): Viewers.Viewer; BEGIN RETURN Viewers.This(Pointer.X, Pointer.Y) END MarkedViewer; PROCEDURE PassFocus* (V: Viewers.Viewer); VAR M: ControlMsg; BEGIN M.id := defocus; FocusViewer.handle(FocusViewer, M); FocusViewer := V END PassFocus; (*command interpretation*) PROCEDURE Call* (name: ARRAY OF CHAR; par: ParList; new: BOOLEAN; VAR res: INTEGER); VAR Mod: Modules.Module; P: Modules.Command; i, j: INTEGER; BEGIN i := 0; j := 0; res := 1; Win32.SyncDisplay; WHILE name[j] # 0X DO IF name[j] = "." THEN i := j END ; INC(j) END ; IF i > 0 THEN name[i] := 0X; IF new THEN Modules.Free(name, FALSE) END ; Mod := Modules.ThisMod(name); IF Modules.res = 0 THEN INC(i); j := i; WHILE name[j] # 0X DO name[j - i] := name[j]; INC(j) END ; name[j - i] := 0X; P := Modules.ThisCommand(Mod, name); IF Modules.res = 0 THEN Par := par; Par.vwr := Viewers.This(par.frame.X, par.frame.Y); P; res := 0 ELSE res := Modules.res END ELSE res := Modules.res END ELSE COPY(name, Modules.importing) END END Call; PROCEDURE GetSelection* (VAR text: Texts.Text; VAR beg, end, time: LONGINT); VAR M: SelectionMsg; BEGIN M.time := -1; M.text := NIL; Viewers.Broadcast(M); text := M.text; beg := M.beg; end := M.end; time := M.time END GetSelection; PROCEDURE GC; BEGIN IF ActCnt <= 0 THEN Kernel.GC; ActCnt := BasicCycle END ; CurTask.time := Time() + 50 END GC; PROCEDURE Install* (T: Task); VAR t: Task; BEGIN t := PrevTask; T.removed := FALSE; WHILE (t.next # PrevTask) & (t.next # T) DO t := t.next END ; IF (t.next # T) & (CurTask # T) THEN IF CurTask # NIL THEN (* called from a task *) T.next := CurTask.next; CurTask.next := T; ELSE (* no task is currently running *) T.next := PrevTask.next; PrevTask.next := T; END END END Install; PROCEDURE Remove* (T: Task); VAR t: Task; BEGIN (* mh 6.2.94 t := PrevTask; WHILE (t.next # T) & (t.next # PrevTask) DO t := t.next END ; IF t.next = T THEN t.next := t.next.next; PrevTask := t.next END ; IF CurTask = T THEN CurTask := PrevTask.next END ; IF FirstTask = T THEN FirstTask := PrevTask.next END *) T.removed := TRUE; END Remove; PROCEDURE Collect* (count: INTEGER); BEGIN ActCnt := count END Collect; PROCEDURE SetFont* (fnt: Fonts.Font); BEGIN CurFnt := fnt END SetFont; PROCEDURE SetColor* (col: SHORTINT); BEGIN CurCol := col END SetColor; PROCEDURE SetOffset* (voff: SHORTINT); BEGIN CurOff := voff END SetOffset; PROCEDURE UpdateDisplay; VAR N: ControlMsg; VM: Viewers.ViewerMsg; BEGIN N.id := neutralize; Viewers.Broadcast(N); FadeCursor(Pointer); VM.id := Viewers.suspend; Viewers.Broadcast(VM); VM.id := Viewers.restore; Viewers.Broadcast(VM) END UpdateDisplay; PROCEDURE Loop*; VAR V: Viewers.Viewer; M: InputMsg; N: ControlMsg; VM: Viewers.ViewerMsg; prevX, prevY, X, Y: INTEGER; keys: SET; ch: CHAR; val, EBP: LONGINT; mod: Modules.Module; nextWakeup: LONGINT; BEGIN Kernel.EventLoop := Loop; Kernel.MarkState; S.GETREG(5, EBP); Kernel.stackBottom := EBP; (* mild hack: throw away the first WM-PAINT message by calling Input.Mouse before setting Win32.UpdateDisplay. This avoids screen flicker at startup *) Input.Mouse(keys, X, Y); Win32.UpdateDisplay := UpdateDisplay; LOOP CurTask := NIL; IF nextWakeup > Time() THEN Win32.WaitMessage END ; Input.Mouse(keys, X, Y); IF Input.Available() > 0 THEN Input.Read(ch); IF ch = ESC THEN N.id := neutralize; Viewers.Broadcast(N); FadeCursor(Pointer) ELSIF ch = SETUP THEN N.id := mark; N.X := X; N.Y := Y; V := Viewers.This(X, Y); V.handle(V, N) ELSIF ch = 0CX THEN UpdateDisplay; ELSE M.id := consume; M.ch := ch; M.fnt := CurFnt; M.col := CurCol; M.voff := CurOff; FocusViewer.handle(FocusViewer, M); DEC(ActCnt) END ELSIF keys # {} THEN M.id := track; M.X := X; M.Y := Y; M.keys := keys; REPEAT V := Viewers.This(M.X, M.Y); V.handle(V, M); Input.Mouse(M.keys, M.X, M.Y) UNTIL M.keys = {}; DEC(ActCnt) ELSE IF (X # prevX) OR (Y # prevY) OR ~Mouse.on THEN M.id := track; M.X := X; M.Y := Y; M.keys := keys; V := Viewers.This(X, Y); V.handle(V, M); prevX := X; prevY := Y END ; FirstTask := PrevTask.next; CurTask := FirstTask; REPEAT IF CurTask.removed THEN (*unlink the task from the list*) PrevTask.next := CurTask.next; IF FirstTask = CurTask THEN FirstTask := FirstTask.next END ; CurTask := CurTask.next; ELSE IF CurTask.time <= Input.Time() THEN IF ~CurTask.safe THEN PrevTask.next := CurTask.next; IF CurTask = FirstTask THEN FirstTask := CurTask.next END END ; CurTask.handle; PrevTask.next := CurTask; END ; PrevTask := CurTask; CurTask := CurTask.next; END UNTIL CurTask = FirstTask; CurTask := FirstTask; nextWakeup := MAX(LONGINT); REPEAT IF CurTask.time < nextWakeup THEN nextWakeup := CurTask.time END ; CurTask := CurTask.next UNTIL CurTask = FirstTask END END END Loop; BEGIN NEW(Par); User[0] := 0X; Arrow.Fade := FadeArrow; Arrow.Draw := DrawArrow; ArrowFade := FadeArrow; Star.Fade := FlipStar; Star.Draw := FlipStar; OpenCursor(Mouse); OpenCursor(Pointer); DW := Display.Width; DH := Display.Height; CL := Display.ColLeft; H3 := DH - DH DIV 3; H2 := H3 - H3 DIV 2; H1 := DH DIV 5; H0 := DH DIV 10; unitW := DW DIV 8; OpenDisplay(unitW * 5, DW - unitW * 5, DH); FocusViewer := Viewers.This(0, 0); CurFnt := Fonts.Default; CurCol := Display.white; CurOff := 0; Collect(BasicCycle); NEW(PrevTask); PrevTask.handle := GC; PrevTask.safe := TRUE; PrevTask.time := 0; PrevTask.next := PrevTask; CurTask := NIL; Mod := Modules.ThisMod("System"); END Oberon.