DIRECTORY Ascii, Atom, Basics, CharDisplays, IO, IOClasses, Menus, MessageWindow, NodeProps, Process, RefText, Rope, TerminalFace, TiogaMenuOps, TiogaOps, TIPUser, ViewerClasses, ViewerOps, ViewerTools;

BufferedTiogaDisplays: CEDAR MONITOR
LOCKS NARROW[cd.otherInstanceData, TiogaDisplay] USING cd: CharDisplay
IMPORTS Ascii, Atom, Basics, CharDisplays, IO, IOClasses, Menus, MessageWindow, NodeProps, Process, RefText, Rope, TerminalFace, TiogaMenuOps, TiogaOps, TIPUser, ViewerOps, ViewerTools

= {OPEN CharDisplays;

REFTEXT: TYPE = REF TEXT;
Viewer: TYPE = ViewerClasses.Viewer;
ViewerClass: TYPE = ViewerClasses.ViewerClass;

TiogaDisplay: TYPE = REF TiogaDisplayRep;
TiogaDisplayRep: TYPE = MONITORED RECORD [
destroyed: BOOL _ FALSE,
root, logNode, arrayNode: TiogaOps.Ref,
req, ack: CONDITION,
proc: PROCESS _ NIL,
activity: BOOL _ FALSE,
flush: BOOL _ FALSE,
insertLine: INT _ 0,
firstInsertCol, afterLastInsertCol: INT _ 0,
deleteCount: NAT _ 0,
insertLooks: ROPE _ baseLooks,
insertBuffer: REFTEXT _ NIL --actually RefText.New[cd.det.columns]--,
caretWrong: BOOL _ FALSE,
eatChars, spitChars: IO.STREAM _ NIL,
looks: ROPE _ baseLooks,
spaces: ROPE _ NIL,
lineS: SEQUENCE length: NAT OF Line
];

baseLooks: ROPE = "";

Line: TYPE = RECORD [
tiogaCount: NAT,
key: ATOM];

tiogaClass, tiogaDisplayViewerClass: ViewerClass _ NIL;
tiogaDisplayViewerClassFlavor: ATOM _ $BufferedTiogaCharDisplay;
cdProp: ATOM _ $CharDisplayFromViewer;

minPause: Process.Milliseconds _ 250;
maxFactor: NAT _ 16;

tiogaCharDisplayClass: CharDisplayClass _ NEW [CharDisplayClassRep _ [
name: "BufferedTioga",
Init: Init,
ChangeDetails: SimplyChange,
DeleteChar: DeleteChar,
TakeChar: TakeChar,
CursorMove: CursorMove,
Line: TLine,
ClearTo: ClearTo,
ClearAll: ClearAll,
SetEmph: SetEmph,
Emphasize: Emphasize,
SetFont: SetFont,
Beep: Beep,
Destroyed: Destroyed]];

InitTiogaDisplayClass: PROC = {
tdTIP: TIPUser.TIPTable _ TIPUser.InstantiateNewTIPTable["TiogaDisplay.TIP"];
menu: Menus.Menu _ Menus.CreateMenu[];
tiogaClass _ ViewerOps.FetchViewerClass[$Text];
tiogaDisplayViewerClass _ NEW [ViewerClasses.ViewerClassRec _ tiogaClass^];
tiogaDisplayViewerClass.notify _ NotifyTiogaDisplay;
tiogaDisplayViewerClass.destroy _ NoteTiogaDestruction;
tiogaDisplayViewerClass.icon _ typescript;
tdTIP.mouseTicks _ MIN[tdTIP.mouseTicks, tiogaClass.tipTable.mouseTicks];
tdTIP.opaque _ FALSE;
tdTIP.link _ tiogaClass.tipTable;
tiogaDisplayViewerClass.tipTable _ tdTIP;
menu.AppendMenuEntry[Menus.CreateEntry["Find", Find]];
menu.AppendMenuEntry[Menus.CreateEntry["Word", Word]];
menu.AppendMenuEntry[Menus.CreateEntry["Def", Def]];
menu.AppendMenuEntry[Menus.CreateEntry["Position", Position]];
menu.AppendMenuEntry[Menus.CreateEntry["Normalize", Normalize]];
menu.AppendMenuEntry[Menus.CreateEntry["PrevPlace", PrevPlace]];
menu.AppendMenuEntry[Menus.CreateEntry["Reselect", Reselect]];
menu.AppendMenuEntry[Menus.CreateEntry["Grab", Grab]];
tiogaDisplayViewerClass.menu _ menu;
ViewerOps.RegisterViewerClass[tiogaDisplayViewerClassFlavor, tiogaDisplayViewerClass];
RegClass[tiogaCharDisplayClass];
};

Find: Menus.MenuProc = {
v: Viewer _ NARROW[parent];
[] _ TiogaOps.FindText[viewer: v, whichDir: SearchDir[mouseButton], case: NOT shift];
};

Word: Menus.MenuProc = {
v: Viewer _ NARROW[parent];
[] _ TiogaOps.FindWord[viewer: v, whichDir: SearchDir[mouseButton], case: NOT shift];
};

Def: Menus.MenuProc = {
v: Viewer _ NARROW[parent];
[] _ TiogaOps.FindDef[viewer: v, whichDir: SearchDir[mouseButton], case: NOT shift];
};

SearchDir: PROC [mb: Menus.MouseButton] RETURNS [sd: TiogaOps.SearchDir] =
{sd _ SELECT mb FROM red => forwards, yellow => anywhere, blue => backwards, ENDCASE => ERROR};

Position: Menus.MenuProc = {
v: Viewer _ NARROW[parent];
TiogaMenuOps.Position[v]};

Normalize: Menus.MenuProc = {
v: Viewer _ NARROW[parent];
TiogaMenuOps.Normalize[v]};

PrevPlace: Menus.MenuProc = {
v: Viewer _ NARROW[parent];
TiogaMenuOps.PrevPlace[v]};

Reselect: Menus.MenuProc = {
v: Viewer _ NARROW[parent];
TiogaMenuOps.Reselect[v]};

Grab: Menus.MenuProc = {
v: Viewer _ NARROW[parent];
v.class.notify[v, LIST[ViewerTools.GetSelectionContents[]]];
};

NoteTiogaDestruction: PROC [self: Viewer] --ViewerClasses.DestroyProc-- = {
cd: CharDisplay = GetDisplay[self];
td: TiogaDisplay = NARROW[cd.otherInstanceData];
IF cd.viewer.destroyed AND NOT td.destroyed THEN {
td.destroyed _ TRUE;
td.eatChars.Close[TRUE !IO.Error => CONTINUE];
td.spitChars.Close[TRUE !IO.Error => CONTINUE];
};
tiogaClass.destroy[self];
};

NotifyTiogaDisplay: PROC [self: Viewer, input: LIST OF REF ANY] --ViewerClasses.NotifyProc-- = {
cd: CharDisplay = GetDisplay[self];
td: TiogaDisplay = NARROW[cd.otherInstanceData];
WITH input.first SELECT FROM
a: ATOM => SELECT a FROM
$TDInput => {
r: ROPE;
ctl, shift, meta: BOOL _ FALSE;
FOR input _ input.rest, input.rest WHILE input # NIL DO
WITH input.first SELECT FROM
R: ROPE => r _ R;
t: REFTEXT => r _ Rope.FromRefText[t];
b: ATOM => SELECT b FROM
$Ctl => ctl _ TRUE;
$Shift => shift _ TRUE;
$Meta => meta _ TRUE;
ENDCASE => ERROR;
ENDCASE => ERROR;
ENDLOOP;
FOR i: INT IN [0 .. r.Length[]) DO
c: CHAR _ r.Fetch[i];
IF NOT shift THEN c _ Ascii.Lower[c];
IF ctl THEN c _ Control[c];
IF meta THEN c _ c + 128;
td.eatChars.PutChar[c !
IO.Error => {
MessageWindow.Append[Rope.Cat["Stream from terminal ", self.name, " broken"], TRUE];
MessageWindow.Blink[];
MessageWindow.Clear[];
EXIT}
];
ENDLOOP;
RETURN;
};
ENDCASE;
r: ROPE => {
td.eatChars.PutRope[r];
RETURN;
};
ENDCASE;
tiogaClass.notify[self, input];
};

Control: PROC [c: CHAR] RETURNS [cc: CHAR] = {
d: NAT _ c - 0C;
cd: NAT _ Basics.BITAND[d, 31];
cc _ 0C + cd;
};

GetDisplay: PROC [self: Viewer] RETURNS [cd: CharDisplay] = INLINE
{cd _ NARROW[ViewerOps.FetchProp[viewer: self, prop: cdProp]]};

Init: PROC [cd: CharDisplay, initData: REF ANY _ NIL] = {
td: TiogaDisplay _ NEW [TiogaDisplayRep[cd.det.lines]];
InitDoc: PROC [root: TiogaOps.Ref] = {
wasIn: BOOL _ TiogaOps.SelectionRoot[] = td.root;
IF root # td.root THEN ERROR;
IF NOT wasIn THEN TiogaOps.SaveSelA[];
TiogaOps.PutProp[
n: td.root,
name: $StyleDef,
value: NodeProps.DoSpecs[$StyleDef, "
BeginStyle
(Cedar) AttachStyle
(look.v) \"video reverse\" {\"ReverseGacha\" family} StyleRule
EndStyle
"]
];
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.arrayNode, 0]];
TiogaOps.Break[];
td.logNode _ TiogaOps.FirstChild[td.root];
td.arrayNode _ TiogaOps.LastChild[td.root];
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.arrayNode, 0]];
TiogaOps.SetLooks[baseLooks, caret];
TiogaOps.InsertChar['\n];
FOR i: NAT IN [0 .. cd.det.columns) DO
TiogaOps.InsertChar['0 + (i / 10)];
ENDLOOP;
TiogaOps.InsertChar['\n];
TiogaOps.SetLooks[baseLooks.Cat["z"], caret];
FOR i: NAT IN [0 .. cd.det.columns) DO
TiogaOps.InsertChar['0 + (i MOD 10)];
ENDLOOP;
TiogaOps.SetLooks[baseLooks, caret];
TiogaOps.InsertChar['\n];
FOR l: NAT IN [0 .. cd.det.lines) DO
TiogaOps.InsertChar['\n];
td.lineS[l] _ [
tiogaCount: 0,
key: Atom.MakeAtom[IO.PutFR["Before%g", IO.int[l]]]
];
ENDLOOP;
IF NOT wasIn THEN TiogaOps.RestoreSelA[];
};
cd.otherInstanceData _ td;
cd.viewer _ ViewerOps.CreateViewer[flavor: tiogaDisplayViewerClassFlavor, info: [name: cd.name]];
cd.viewer.tipTable _ tiogaDisplayViewerClass.tipTable;
cd.viewer.menu _ tiogaDisplayViewerClass.menu.CopyMenu[];
ViewerOps.AddProp[viewer: cd.viewer, prop: cdProp, val: cd];
td.root _ TiogaOps.ViewerDoc[cd.viewer];
td.logNode _ TiogaOps.FirstChild[td.root];
td.arrayNode _ TiogaOps.LastChild[td.root];
TRUSTED {
Process.InitializeCondition[@td.req, Process.MsecToTicks[minPause]];
Process.EnableAborts[@td.req];
Process.InitializeCondition[@td.ack, Process.SecondsToTicks[1]];
Process.EnableAborts[@td.ack];
};
td.activity _ td.flush _ FALSE;
td.insertLine _ td.firstInsertCol _ td.deleteCount _ 0;
td.insertLooks _ baseLooks;
td.insertBuffer _ RefText.New[cd.det.columns];
td.caretWrong _ FALSE;
[push: td.eatChars, pull: td.spitChars] _ IOClasses.CreatePipe[];
cd.fromDisplay _ td.spitChars;
td.looks _ baseLooks;
td.spaces _ " ";
FOR i: INT IN [0 .. cd.det.columns) DO
td.spaces _ td.spaces.Cat[" "];
ENDLOOP;
TiogaOps.CallWithLocks[InitDoc, td.root];
ReallySetFont[td, "Gacha"];
SetLines[cd, td];
TRUSTED {Process.Detach[td.proc _ FORK Refresh[cd]]};
};

Destruction: INTERNAL PROC [cd: CharDisplay, td: TiogaDisplay] RETURNS [destroyed: BOOL] = {
IF destroyed _ cd.viewer.destroyed THEN {
IF NOT td.destroyed THEN {
td.destroyed _ TRUE;
td.eatChars.Close[TRUE !IO.Error => CONTINUE];
td.spitChars.Close[TRUE !IO.Error => CONTINUE];
};
};
};

Flush: INTERNAL PROC [cd: CharDisplay, td: TiogaDisplay] = {
WHILE ((td.afterLastInsertCol > td.firstInsertCol) OR td.caretWrong) AND NOT td.destroyed DO
td.flush _ TRUE;
BROADCAST td.req;
WAIT td.ack;
ENDLOOP;
td.activity _ TRUE;
};

Refresh: ENTRY PROC [cd: CharDisplay] = {
ENABLE UNWIND => {};
td: TiogaDisplay _ NARROW[cd.otherInstanceData];
WHILE NOT td.destroyed DO
td.activity _ FALSE;
WAIT td.req;
IF (td.flush OR NOT td.activity) AND (td.afterLastInsertCol > td.firstInsertCol OR td.caretWrong) THEN {
WithLocks: INTERNAL PROC [root: TiogaOps.Ref] = {
wasIn: BOOL _ TiogaOps.SelectionRoot[] = td.root;
IF root # td.root THEN ERROR;
IF Destruction[cd, td] THEN RETURN;
IF NOT wasIn THEN TiogaOps.SaveSelA[];
IF td.afterLastInsertCol > td.firstInsertCol THEN {
base: INT _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[td.insertLine].key].where;
wasEmpty: BOOL _ td.lineS[td.insertLine].tiogaCount = 0;
start: INT _ base+MIN[td.firstInsertCol, td.lineS[td.insertLine].tiogaCount];
end: INT _ base+MIN[td.firstInsertCol+td.deleteCount, td.lineS[td.insertLine].tiogaCount];
goners: INT _ end - start;
colDelta: INT _ td.firstInsertCol - td.lineS[td.insertLine].tiogaCount;
IF end > start
THEN TiogaOps.SetSelection[
viewer: cd.viewer,
start: [td.arrayNode, start],
end: [td.arrayNode, end-1 --because it's a char address, not a point address--],
pendingDelete: TRUE]
ELSE TiogaOps.SelectPoint[
viewer: cd.viewer,
caret: [td.arrayNode, start]];
IF colDelta > 0 THEN {
TiogaOps.SetLooks[looks: baseLooks, which: caret];
TiogaOps.InsertRope[td.spaces.Substr[0, colDelta]];
td.lineS[td.insertLine].tiogaCount _ td.lineS[td.insertLine].tiogaCount + colDelta;
};
TiogaOps.SetLooks[looks: td.insertLooks, which: caret];
TiogaOps.InsertRope[FromSubText[td.insertBuffer, td.firstInsertCol, td.afterLastInsertCol]];
td.lineS[td.insertLine].tiogaCount _ td.lineS[td.insertLine].tiogaCount + (td.afterLastInsertCol - td.firstInsertCol) - goners;
IF wasEmpty OR td.firstInsertCol = 0 THEN TiogaOps.PutTextKey[node: td.arrayNode, where: base, key: td.lineS[td.insertLine].key];
IF cd.line = td.insertLine AND cd.col = td.afterLastInsertCol THEN td.caretWrong _ FALSE;
td.afterLastInsertCol _ td.firstInsertCol _ 0;
td.deleteCount _ 0;
};
IF NOT wasIn THEN {
TiogaOps.RestoreSelA[];
td.caretWrong _ FALSE;
}
ELSE IF td.caretWrong THEN {
ReallyMoveCursor[cd, td, cd.line, cd.col];
td.caretWrong _ FALSE;
};
};
TiogaOps.CallWithLocks[WithLocks, td.root];
};
IF td.flush AND NOT td.destroyed THEN {
td.flush _ FALSE;
BROADCAST td.ack};
ENDLOOP;
};

SetLines: PROC [cd: CharDisplay, td: TiogaDisplay, recursed: BOOL _ FALSE] = {
IsBegin: PROC [ci: INT] RETURNS [is: BOOL] =
INLINE {is _ ci = 0 OR nr.Fetch[ci-1] = '\n};
nr: ROPE;
lineNum, prevCI: INT;
td.arrayNode _ TiogaOps.LastChild[td.root];
nr _ TiogaOps.GetRope[td.arrayNode];
lineNum _ cd.det.lines;
prevCI _ nr.Length[];
FOR ci: INT _ nr.Length[]-1, ci-1 WHILE lineNum > 0 DO
IF ci < 0 THEN {
IF recursed THEN ERROR;
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.arrayNode, 0]];
FOR i: INT IN [0 .. lineNum] DO TiogaOps.InsertChar['\n] ENDLOOP;
SetLines[cd, td, TRUE];
EXIT;
};
IF IsBegin[ci] THEN {
lineNum _ lineNum - 1;
TiogaOps.PutTextKey[node: td.arrayNode, where: ci, key: td.lineS[lineNum].key];
td.lineS[lineNum].tiogaCount _ prevCI - ci - 1;
prevCI _ ci;
};
ENDLOOP;
};

DeleteChar: ENTRY PROC [cd: CharDisplay] = {
ENABLE UNWIND => {};
td: TiogaDisplay = NARROW[cd.otherInstanceData];
WithLocks: INTERNAL PROC [root: TiogaOps.Ref] = {
base: INT _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[cd.line].key].where;
IF root # td.root THEN ERROR;
IF Destruction[cd, td] THEN RETURN;
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.arrayNode, base+cd.col]];
TiogaOps.DeleteNextCharacter[];
td.lineS[cd.line].tiogaCount _ td.lineS[cd.line].tiogaCount - 1;
};
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
IF cd.col >= td.lineS[cd.line].tiogaCount AND NOT (td.insertLine = cd.line AND td.afterLastInsertCol > td.firstInsertCol) THEN RETURN;
Flush[cd, td];
TiogaOps.CallWithLocks[WithLocks, td.root];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
};

TakeChar: ENTRY PROC [cd: CharDisplay, char: CHAR, insert: BOOL _ FALSE] = {
ENABLE UNWIND => {};
td: TiogaDisplay _ NARROW[cd.otherInstanceData];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
IF char = '\n THEN char _ char + 0200B;
IF
(
(td.afterLastInsertCol > td.firstInsertCol) AND
(cd.line # td.insertLine OR
(NOT td.insertLooks.Equal[td.looks]) OR
(NOT (cd.col = td.afterLastInsertCol OR
(
(NOT insert) AND
cd.col IN [td.firstInsertCol-1 .. td.afterLastInsertCol])))))
THEN {
Flush[cd, td];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
};
IF td.afterLastInsertCol = td.firstInsertCol THEN {
td.insertLine _ cd.line;
td.afterLastInsertCol _ td.firstInsertCol _ cd.col;
td.insertLooks _ td.looks};
IF cd.col = td.afterLastInsertCol THEN {
IF NOT insert THEN td.deleteCount _ td.deleteCount + 1;
td.insertBuffer[td.afterLastInsertCol] _ char;
td.afterLastInsertCol _ td.afterLastInsertCol + 1;
}
ELSE {
td.insertBuffer[cd.col] _ char;
IF cd.col < td.firstInsertCol THEN {
td.firstInsertCol _ cd.col;
td.deleteCount _ td.deleteCount + 1;
};
};
td.activity _ TRUE;
InternalCursorMove[cd, 0, 1, TRUE];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
};

ReallyMoveCursor: PROC [cd: CharDisplay, td: TiogaDisplay, line, col: INT] = {
colDelta: INT;
IF line >= cd.det.lines THEN {
delta: INT _ MIN[line - (cd.det.lines-1), cd.det.lines];
arrayEnd: INT _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[cd.det.lines-1].key].where + td.lineS[cd.det.lines-1].tiogaCount + 1;
topStart: INT _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[0].key].where;
topEnd: INT _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[delta-1].key].where + td.lineS[delta-1].tiogaCount;
line _ line - delta;
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.arrayNode, arrayEnd]];
FOR i: INT IN [0 .. delta) DO TiogaOps.InsertChar['\n] ENDLOOP;
FOR i: INT IN [delta .. cd.det.lines) DO
td.lineS[i-delta].tiogaCount _ td.lineS[i].tiogaCount;
TiogaOps.PutTextKey[
node: td.arrayNode,
where: TiogaOps.GetTextKey[td.arrayNode, td.lineS[i].key].where,
key: td.lineS[i-delta].key];
ENDLOOP;
FOR i: INT IN [cd.det.lines - delta .. cd.det.lines) DO
td.lineS[i].tiogaCount _ 0;
TiogaOps.PutTextKey[
node: td.arrayNode,
where: arrayEnd + i - (cd.det.lines - delta),
key: td.lineS[i].key];
ENDLOOP;
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.logNode, TiogaOps.GetRope[td.logNode].Length[]]];
TiogaOps.SetSelection[viewer: cd.viewer, start: [td.arrayNode, topStart], end: [td.arrayNode, topEnd], pendingDelete: TRUE, which: secondary];
TiogaOps.ToPrimary[];
};
cd.line _ line;
cd.col _ col;
colDelta _ cd.col - td.lineS[cd.line].tiogaCount;
TiogaOps.SelectPoint[
viewer: cd.viewer,
caret: [
td.arrayNode,
TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[cd.line].key].where + MIN[cd.col, td.lineS[cd.line].tiogaCount]]
];
IF colDelta > 0 THEN {
wasEmpty: BOOL _ td.lineS[cd.line].tiogaCount = 0;
TiogaOps.SetLooks[baseLooks, caret];
TiogaOps.InsertRope[td.spaces.Substr[0, colDelta]];
td.lineS[cd.line].tiogaCount _ td.lineS[cd.line].tiogaCount + colDelta;
IF wasEmpty THEN SetLines[cd, td];
};
};

CursorMove: ENTRY PROC [cd: CharDisplay, line, col: INT, relative: BOOL _ FALSE, doLine, doCol: BOOL _ TRUE] = {
ENABLE UNWIND => {};
td: TiogaDisplay = NARROW[cd.otherInstanceData];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
InternalCursorMove[cd: cd, line: line, col: col, relative: relative, doLine: doLine, doCol: doCol];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
};

InternalCursorMove: INTERNAL PROC [cd: CharDisplay, line, col: INT, relative: BOOL _ FALSE, doLine, doCol: BOOL _ TRUE] = {
td: TiogaDisplay = NARROW[cd.otherInstanceData];
WithLocks: INTERNAL PROC [root: TiogaOps.Ref] = {
wasIn: BOOL _ TiogaOps.SelectionRoot[] = td.root;
IF root # td.root THEN ERROR;
IF Destruction[cd, td] THEN RETURN;
IF NOT wasIn THEN TiogaOps.SaveSelA[];
ReallyMoveCursor[cd, td, line, col];
IF NOT wasIn THEN TiogaOps.RestoreSelA[];
};
IF relative THEN {line _ line + cd.line; col _ col + cd.col};
IF NOT doLine THEN line _ cd.line;
IF NOT doCol THEN col _ cd.col;
IF cd.det.autoMargins THEN {
dl: INT _ col / cd.det.columns;
line _ line + dl;
col _ col - dl * cd.det.columns;
WHILE col < 0 DO col _ col + cd.det.columns; line _ line - 1 ENDLOOP;
}
ELSE col _ MAX[MIN[col, cd.det.columns-1], 0];
IF line < 0 THEN line _ 0;
IF line < cd.det.lines THEN NULL
ELSE IF NOT cd.det.scrolls THEN line _ line MOD cd.det.lines;
IF line = cd.line AND col = cd.col THEN RETURN;
IF line >= cd.det.lines
THEN {
Flush[cd, td];
CallWithAllLocks[WithLocks, td.root];
}
ELSE {
cd.line _ line;
cd.col _ col;
td.caretWrong _ TRUE;
td.activity _ TRUE;
};
};
CallWithAllLocks: PROC [proc: PROC [root: TiogaOps.Ref], root: TiogaOps.Ref] = {
TiogaOps.LockSel[primary];
TiogaOps.LockSel[secondary];
{ENABLE UNWIND =>
{TiogaOps.UnlockSel[secondary]; TiogaOps.UnlockSel[primary]};
TiogaOps.CallWithLocks[proc, root];
};
TiogaOps.UnlockSel[secondary];
TiogaOps.UnlockSel[primary];
};

logLineDeletes: BOOL _ TRUE;

TLine: ENTRY PROC [cd: CharDisplay, insert: BOOL] = {
ENABLE UNWIND => {};
td: TiogaDisplay _ NARROW[cd.otherInstanceData];
endBase, endEnd, base: INT;
WithLocks: INTERNAL PROC [root: TiogaOps.Ref] = {
wasIn: BOOL _ TiogaOps.SelectionRoot[] = td.root;
IF root # td.root THEN ERROR;
IF Destruction[cd, td] THEN RETURN;
IF NOT wasIn THEN TiogaOps.SaveSelA[];
IF insert THEN {
TiogaOps.SetSelection[
viewer: cd.viewer,
start: [td.arrayNode, endBase],
end: [td.arrayNode, endEnd]];
TiogaOps.Delete[];
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.arrayNode, base]];
TiogaOps.InsertChar['\n];
}
ELSE {
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.arrayNode, endEnd+1]];
TiogaOps.InsertChar['\n];
IF logLineDeletes THEN {
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.logNode, TiogaOps.GetRope[td.logNode].Length[]]];
TiogaOps.SetSelection[
viewer: cd.viewer,
start: [td.arrayNode, base],
end: [td.arrayNode, base + td.lineS[cd.line].tiogaCount],
pendingDelete: TRUE,
which: secondary
];
TiogaOps.ToPrimary[];
IF wasIn THEN {
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.arrayNode, base + MIN[cd.col, td.lineS[cd.line].tiogaCount]]];
td.caretWrong _ cd.col > td.lineS[cd.line].tiogaCount;
};
}
ELSE {
TiogaOps.SetSelection[
viewer: cd.viewer,
start: [td.arrayNode, base],
end: [td.arrayNode, base + td.lineS[cd.line].tiogaCount]
];
TiogaOps.Delete[];
};
};
IF NOT wasIn THEN TiogaOps.RestoreSelA[];
};
Flush[cd, td];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
endBase _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[cd.det.lines-1].key].where;
endEnd _ endBase + td.lineS[cd.det.lines-1].tiogaCount;
base _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[cd.line].key].where;
td.caretWrong _ TRUE;
(IF insert OR NOT logLineDeletes THEN TiogaOps.CallWithLocks ELSE CallWithAllLocks)[WithLocks, td.root];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
SetLines[cd, td];
};

logClears: BOOL _ FALSE;

ClearTo: ENTRY PROC [cd: CharDisplay, where: Where] = {
ENABLE UNWIND => {};
td: TiogaDisplay _ NARROW[cd.otherInstanceData];
col: INT _ cd.col;
need: BOOL _ FALSE;
WithLocks: INTERNAL PROC [root: TiogaOps.Ref] = {
wasIn: BOOL _ TiogaOps.SelectionRoot[] = td.root;
col: INT _ cd.col;
lastLine: INT _ SELECT where FROM
EndOfLine => cd.line,
EndOfScreen => cd.det.lines-1,
ENDCASE => ERROR;
IF root # td.root THEN ERROR;
IF Destruction[cd, td] THEN RETURN;
IF NOT wasIn THEN TiogaOps.SaveSelA[];
FOR line: INT IN [cd.line .. lastLine] DO
base: INT _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[line].key].where;
begin: INT _ base + MIN[col, td.lineS[line].tiogaCount];
end: INT _ base + td.lineS[line].tiogaCount;
IF end > begin THEN {
IF logClears AND col = 0 THEN {
TiogaOps.SelectPoint[viewer: cd.viewer, caret: [td.logNode, TiogaOps.GetRope[td.logNode].Length[]]];
TiogaOps.SetSelection[
viewer: cd.viewer,
start: [td.arrayNode, begin],
end: [td.arrayNode, end-1],
pendingDelete: TRUE,
which: secondary
];
TiogaOps.ToPrimary[];
TiogaOps.InsertChar['\n];
}
ELSE {
TiogaOps.SetSelection[
viewer: cd.viewer,
start: [td.arrayNode, begin],
end: [td.arrayNode, end-1]
];
TiogaOps.Delete[];
};
td.lineS[line].tiogaCount _ begin - base;
IF td.lineS[line].tiogaCount = 0 THEN TiogaOps.PutTextKey[node: td.arrayNode, where: base, key: td.lineS[line].key];
};
col _ 0;
ENDLOOP;
IF NOT wasIn THEN TiogaOps.RestoreSelA[];
};
Flush[cd, td];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
FOR line: INT IN [cd.line .. SELECT where FROM EndOfLine => cd.line, EndOfScreen => cd.det.lines-1, ENDCASE => ERROR] WHILE NOT need DO
IF td.lineS[line].tiogaCount > col THEN need _ TRUE;
col _ 0;
ENDLOOP;
IF NOT need THEN RETURN;
CallWithAllLocks[WithLocks, td.root];
td.caretWrong _ TRUE;
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
};

ClearAll: ENTRY PROC [cd: CharDisplay] = {
ENABLE UNWIND => {};
td: TiogaDisplay _ NARROW[cd.otherInstanceData];
WithLocks: INTERNAL PROC [root: TiogaOps.Ref] = {
wasIn: BOOL _ TiogaOps.SelectionRoot[] = td.root;
begin: INT _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[0].key].where;
end: INT _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[cd.det.lines-1].key].where + td.lineS[cd.det.lines-1].tiogaCount;
IF root # td.root THEN ERROR;
IF Destruction[cd, td] THEN RETURN;
IF NOT wasIn THEN TiogaOps.SaveSelA[];
TiogaOps.SetSelection[
viewer: cd.viewer,
start: [td.arrayNode, begin],
end: [td.arrayNode, end],
pendingDelete: TRUE];
FOR l: INT IN [0 .. cd.det.lines) DO
TiogaOps.InsertChar['\n];
ENDLOOP;
IF NOT wasIn THEN TiogaOps.RestoreSelA[];
};
Flush[cd, td];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
TiogaOps.CallWithLocks[WithLocks, td.root];
td.caretWrong _ TRUE;
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
SetLines[cd, td];
};

SetEmph: ENTRY PROC [cd: CharDisplay, emph: Emph, on: BOOL] = {
ENABLE UNWIND => {};
td: TiogaDisplay _ NARROW[cd.otherInstanceData];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
cd.emphs[emph] _ on;
td.looks _ baseLooks;
IF cd.emphs[underline] THEN td.looks _ td.looks.Cat["z"];
IF cd.emphs[bold] THEN td.looks _ td.looks.Cat["b"];
IF cd.emphs[italic] THEN td.looks _ td.looks.Cat["i"];
IF cd.emphs[inverse] THEN td.looks _ td.looks.Cat["v"];
};

Emphasize: ENTRY PROC [cd: CharDisplay, emph: Emph, on: BOOL] = {
ENABLE UNWIND => {};
td: TiogaDisplay _ NARROW[cd.otherInstanceData];
WithLocks: INTERNAL PROC [root: TiogaOps.Ref] = {
wasIn: BOOL _ TiogaOps.SelectionRoot[] = td.root;
loc: INT _ TiogaOps.GetTextKey[node: td.arrayNode, key: td.lineS[cd.line].key].where + cd.col;
looks: ROPE _ SELECT emph FROM
underline => "z",
bold => "b",
italic => "i",
inverse => "v",
ENDCASE => ERROR;
IF root # td.root THEN ERROR;
IF Destruction[cd, td] THEN RETURN;
IF NOT wasIn THEN TiogaOps.SaveSelA[];
TiogaOps.SetSelection[
viewer: cd.viewer,
start: [td.arrayNode, loc],
end: [td.arrayNode, loc]];
(IF on THEN TiogaOps.AddLooks ELSE TiogaOps.SubtractLooks)[looks];
IF NOT wasIn THEN TiogaOps.RestoreSelA[];
};
Flush[cd, td];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
IF cd.col > td.lineS[cd.line].tiogaCount THEN RETURN;
TiogaOps.CallWithLocks[WithLocks, td.root];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
};

SetFont: ENTRY PROC [cd: CharDisplay, font: ROPE] = {
ENABLE UNWIND => {};
td: TiogaDisplay = NARROW[cd.otherInstanceData];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
ReallySetFont[td, font];
};

ReallySetFont: PROC [td: TiogaDisplay, font: ROPE] = {
TiogaOps.PutProp[
n: td.logNode,
name: $Postfix,
value: IO.PutFR["\"%g\" family", IO.rope[font]]
];
TiogaOps.PutProp[
n: td.arrayNode,
name: $Postfix,
value: IO.PutFR["\"%g\" family", IO.rope[font]]
];
};

Beep: ENTRY PROC [cd: CharDisplay] = {
ENABLE UNWIND => {};
td: TiogaDisplay = NARROW[cd.otherInstanceData];
IF td.destroyed THEN RETURN WITH ERROR DisplayDestroyed[cd];
IF TerminalFace.hasSoundGenerator THEN
TerminalFace.Beep[500,300]
ELSE {
MessageWindow.Append["Beep", TRUE];
MessageWindow.Blink[];
MessageWindow.Clear[];
};
};

Destroyed: ENTRY PROC [cd: CharDisplay] RETURNS [BOOL] = {
ENABLE UNWIND => {};
td: TiogaDisplay = NARROW[cd.otherInstanceData];
RETURN [td.destroyed];
};

FromSubText: PROC [text: REF TEXT, start, afterLast: INT] RETURNS [rope: ROPE] = {
GenChar: PROC RETURNS [c: CHAR] = {
c _ text[start];
start _ start + 1;
};
rope _ Rope.FromProc[afterLast - start, GenChar];
};

InitTiogaDisplayClass[];

}.
φBufferedTiogaDisplays.Mesa
Copyright c 1986 by Xerox Corporation.  All rights reserved.
Last Edited by: Spreitzer, January 16, 1986 11:31:07 am PST
Pavel, December 27, 1985 5:28:04 pm PST
Locking Order: TiogaDisplay, then Viewers & Tioga

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