
<<TEditDocumentsImpl.mesa; Written by S. McGregor>>
<<McGregor on March 28, 1983 9:21 am>>
<<Paxton on June 2, 1983 10:39 am>>
<<Maxwell, January 6, 1983 11:03 am>>
<<Russ Atkinson, November 16, 1983 7:47 pm>>
<<(removed use of long names to access *.tip)>>
<<Plass, April 20, 1983 5:02 pm>>
<<Doug Wyatt, December 15, 1983 5:48 pm>>
<<>>
DIRECTORY
Buttons USING [ButtonProc, Create],
Convert USING [RopeFromInt],
FS USING [Create, Error, GetName, nullOpenFile, Open, OpenFile],
InputFocus USING [GetInputFocus, SetInputFocus],
Menus, -- USING lots
MessageWindow USING [Append, Clear],
NodeProps USING [GetProp, MapProps, PutProp],
Process USING [Detach, GetCurrent],
PutGet USING [FromFileC, ToFileC, FromRope, ToRope, WriteRopePlain],
EditSpanSupport USING [Apply],
Rope USING [Cat, Concat, Equal, Flatten, FromRefText, Length, ROPE, SkipTo, Substr],
TextEdit USING [DocFromNode, FromRope, Ref],
TextLooks USING [noLooks],
TextNode USING
[FirstChild, LastLocWithin, LocNumber, Location, LocOffset, LocRelative, LocWithin, Offset, NarrowToTextNode, NodeProps, pZone, 
Ref, RefTextNode, Root, TypeName],
TEditCompile USING [minAvgLineLeading],
TEditDocument USING
[ForgetViewer, LineTableRec, RecordViewerForRoot, Selection, TEditDocumentData, TEditDocumentDataRec],
TEditDocumentPrivate,
TEditDocumentPrivateExtras USING [],
TEditImpl USING [PaintTEditDocument, TEditNotifyProc],
TEditInput USING [FreeTree],
TEditInputOps USING [CallWithLocks],
TEditLocks USING [Lock, LockDocAndTdd, Unlock, UnlockDocAndTdd],
TEditProfile USING [DoList],
TEditRefresh USING [ScrollToEndOfSel],
TEditScrolling USING [ScrollTEditDocument],
TEditSelection USING [Alloc, Free, InputModify, MakeSelection, pSel, sSel, fSel],
TEditTouchup USING [fullUpdate],
TiogaMenuOps, -- exports tiogaMenu
TIPUser USING [InstantiateNewTIPTable, InvalidTable, TIPTable],
ViewerBLT USING [ChangeNumberOfLines],
ViewerOps USING
[EnumerateChildren, PaintHint, PaintViewer, RegisterViewerClass, SetMenu],
ViewerClasses USING
[BltRule, DestroyProc, GetProc, InitProc, SaveProc, SetProc, Viewer, ViewerClass, ViewerClassRec],
ViewerClassesExtras USING [SaveAborted],
ViewerTools USING
[EnableUserEdits, --InhibitUserEdits,-- SelPos, SelPosRec, TiogaContents, TiogaContentsRec],
VirtualDesktops USING [EnumerateViewers];

TEditDocumentsImpl: CEDAR MONITOR
IMPORTS Buttons, Convert, EditSpanSupport, FS, InputFocus, Menus, MessageWindow, NodeProps, Process, PutGet, Rope, TEditDocument, 
TEditDocumentPrivate, TextEdit, TextNode, TEditImpl, TEditInput, TEditInputOps, TEditLocks, TEditProfile, TEditRefresh, 
TEditTouchup, TEditScrolling, TEditSelection, TIPUser, ViewerBLT, ViewerClassesExtras, ViewerOps, ViewerTools, VirtualDesktops
EXPORTS TEditImpl, TEditDocument, TEditDocumentPrivate, TEditDocumentPrivateExtras, TiogaMenuOps
SHARES Menus, ViewerClasses
= BEGIN OPEN Menus, TEditDocument, TEditDocumentPrivate, ViewerClasses;

fatalTiogaError: PUBLIC ERROR = CODE ;    -- for RETURN WITH ERROR monitor clearing punts

InitTEditDocument: PUBLIC InitProc = {
data: REF ANY _ self.data;
self.data _ NIL;
InitViewerDoc[self, data] };

InitViewerDoc: PUBLIC PROC [self: Viewer, data: REF ANY] = BEGIN
InitViewerDocInternal[self: self, file: FS.nullOpenFile, data: data];
END;

<<The following is exported to TEditDocumentPrivateExtras. It should move to TEditDocumentPrivate the next time interfaces can be 
changed. (Or perhaps InitViewerDocInternal should become the new InitViewerDoc.) ..DKW >>
InitViewerDocInternal: PUBLIC PROC [self: Viewer, file: FS.OpenFile, data: REF ANY] = BEGIN
tdd: TEditDocumentData _ NARROW[self.data];

InitTddText: PROC = {
IF tdd.text # NIL THEN TEditInput.FreeTree[tdd.text];
tdd.text _ NIL;
IF file=FS.nullOpenFile THEN {
IF self.file#NIL THEN file _ FS.Open[self.file ! FS.Error => CONTINUE];
};
IF file#FS.nullOpenFile THEN {
self.file _ FS.GetName[file].fullFName;
tdd.text _ TextNode.NarrowToTextNode[PutGet.FromFileC[file !
FS.Error => { self.newFile _ TRUE; CONTINUE }]];
};
IF tdd.text=NIL THEN {
tdd.text _ TextNode.NarrowToTextNode[TextEdit.DocFromNode[TextEdit.FromRope[""]]];
};
};

InitLineTable: PROC = {
IF NodeProps.GetProp[tdd.text, $OpenFirstLevelOnly]#NIL THEN tdd.clipLevel _ 1;
tdd.lineTable.lastLine _ 0;
tdd.lineTable[0].pos _ [TextNode.NarrowToTextNode[TextNode.FirstChild[tdd.text]], 0];
};

IF self.link#NIL THEN BEGIN
<<-- make sure another link didn't already init>>
<<-- and if so, copy that data>>
otherInit: Viewer _ NIL;
IF tdd=NIL THEN self.data _ tdd _ NARROW[data];  -- someday I should really find out how to fix this in a less horrible manner
[] _ SpinAndLock[tdd, "InitViewerDoc"];
FOR v: Viewer _ self.link, v.link UNTIL v=self DO
IF ~v.newVersion THEN {otherInit _ v; EXIT};
ENDLOOP;
IF otherInit=NIL THEN InitTddText[]
ELSE BEGIN    -- somebody else already did the init
otherTdd: TEditDocumentData _ NARROW[otherInit.data];
tdd.text _ otherTdd.text;
END;
InitLineTable[];
END
ELSE IF data=NIL THEN BEGIN
IF tdd=NIL THEN tdd _ AllocateDataForNewViewer[self];
[] _ SpinAndLock[tdd, "InitViewerDoc"];
InitTddText[];
InitLineTable[];
END
ELSE WITH data SELECT FROM
d: TEditDocumentData => BEGIN
self.data _ tdd _ d;
[] _ SpinAndLock[tdd, "InitViewerDoc"];
InitTddText[];
InitLineTable[];
END;
root: TextNode.RefTextNode => BEGIN
IF tdd=NIL THEN tdd _ AllocateDataForNewViewer[self];
[] _ SpinAndLock[tdd, "InitViewerDoc"];
tdd.text _ root;
InitLineTable[];
END;
r: Rope.ROPE => BEGIN
IF tdd=NIL THEN tdd _ AllocateDataForNewViewer[self];
[] _ SpinAndLock[tdd, "InitViewerDoc"];
tdd.text _ TextNode.NarrowToTextNode[
TextEdit.DocFromNode[TextEdit.FromRope[r]]];
InitLineTable[];
END;
t: REF TEXT => BEGIN
IF tdd=NIL THEN tdd _ AllocateDataForNewViewer[self];
[] _ SpinAndLock[tdd, "InitViewerDoc"];
tdd.text _ TextNode.NarrowToTextNode[
TextEdit.DocFromNode[TextEdit.FromRope[Rope.FromRefText[t]]]];
InitLineTable[];
END;
ENDCASE => BEGIN    -- bad data
IF tdd=NIL THEN tdd _ AllocateDataForNewViewer[self];
[] _ SpinAndLock[tdd, "InitViewerDoc"];
tdd.text _ TextNode.NarrowToTextNode[PutGet.FromRope["*ERROR*"]];
InitLineTable[];
END;
RecordViewerForRoot[self,tdd.text];
<<old heuristic: IF HasBrackets[self.file] THEN ViewerTools.InhibitUserEdits[self] ELSE>>
ViewerTools.EnableUserEdits[self];
Unlock[tdd];
END;

AllocateDataForNewViewer: PROC [self: Viewer] RETURNS [tdd: TEditDocumentData] = BEGIN
tdd _ TextNode.pZone.NEW[TEditDocumentDataRec];
<<-- for now, just hack in a conservative size line table>>
tdd.lineTable _ TextNode.pZone.NEW[LineTableRec[MAX[2, (self.ch/TEditCompile.minAvgLineLeading)+1]] _
[lastLine: 0, lastY: 0, lines: NULL]];
IF self.column#static AND self.parent=NIL THEN ViewerOps.SetMenu[self, tiogaMenu, FALSE];
self.data _ tdd;
END;

number: INT _ 0;
SaveTEditDocument: PUBLIC SaveProc = {
tdd: TEditDocumentData _ NARROW[self.data];
root: TextNode.Ref;
name: ROPE _ self.file;
errorMessage: ROPE _ NIL;

IF name.Length = 0 THEN {
IF ~force THEN {
ERROR ViewerClassesExtras.SaveAborted["no file name!"];
};
name _ Rope.Flatten[Rope.Cat[
"File-",
Convert.RopeFromInt[number _ number + 1],
".SaveAllEdits"]];
};

IF tdd.readOnly THEN {
ERROR ViewerClassesExtras.SaveAborted["read only document!"];
};

IF ~force
THEN { -- lock so no edits while saving
MessageWindow.Clear[];
[] _ SpinAndLock[tdd, "SaveTEditDocument"]; -- may have other operation in progress
root _ tdd.text;
Unlock[tdd]; -- don't need to keep this locked during rest of Save
[] _ TEditLocks.Lock[root, "SaveTEditDocument", read];
}
ELSE root _ tdd.text;

<<Save the file.>>
{
ENABLE FS.Error => { errorMessage _ error.explanation; CONTINUE };
file: FS.OpenFile ~ FS.Create[name: RemoveVersionNumber[name], keep: 2];
newFile: ROPE ~ FS.GetName[file].fullFName;
newName: ROPE ~ RemoveVersionNumber[newFile];
[] _ PutGet.ToFileC[file, root];
FOR v: Viewer _ self, v.link DO
v.name _ newName; v.file _ newFile;
IF v.link = NIL OR v.link = self THEN EXIT;
ENDLOOP;
};
<<>>
<<Unlock the document if it was locked to begin with.>>
IF ~force THEN TEditLocks.Unlock[root];
IF errorMessage#NIL THEN ERROR ViewerClassesExtras.SaveAborted[errorMessage];
};

RemoveVersionNumber: PROC[name: ROPE] RETURNS[ROPE] = {
RETURN[name.Flatten[start: 0, len: name.SkipTo[0, "!"]]];
};

FileIsMoreRecent: PUBLIC PROC
[root: TextNode.Ref, file: Rope.ROPE] RETURNS [BOOL] = TRUSTED {
<<Returns true if the file on the disk has a more recent create date than the root file create date.  RRA sez that this should 
never happen in the wonderful world of Cedar 5.0.>>
RETURN [FALSE];
};

nullNode: TextNode.RefTextNode = TextEdit.FromRope[NIL];

SetTEditDocument: SetProc = BEGIN
KillSelections: PROC [self: ViewerClasses.Viewer] = { OPEN TEditSelection;
<<This duplicates a procedure in TEditDocuments2Impl.  Someday when you can change an interface, export it from there rather than 
copying it. -- Bill>>
IF pSel # NIL AND pSel.viewer = self THEN MakeSelection[selection: primary];
IF sSel # NIL AND sSel.viewer = self THEN MakeSelection[selection: secondary];
IF fSel # NIL AND fSel.viewer = self THEN MakeSelection[selection: feedback] };
tdd: TEditDocumentData _ NARROW[self.data];
IF self.destroyed OR tdd = NIL THEN RETURN;
IF op#$SelPos AND InputFocus.GetInputFocus[].owner=self THEN InputFocus.SetInputFocus[];
IF op=NIL OR op=$TiogaContents OR op=$TiogaDocument OR op=$KeepRootStyleProps THEN BEGIN
rope: Rope.ROPE;
IF self.link#NIL THEN ERROR;    -- not yet implemented
[] _ SpinAndLock[tdd, "SetTEditDocument"];
KillSelections[self];
IF op=NIL OR op=$KeepRootStyleProps THEN {
root: TextNode.RefTextNode = tdd.text;
node: TextNode.RefTextNode = TextNode.NarrowToTextNode[root];
typename: TextNode.TypeName = root.typename;
child: TextNode.RefTextNode =
IF node=NIL THEN NIL ELSE TextNode.NarrowToTextNode[node.child];
rope _ IF data=NIL THEN "" ELSE NARROW[data];
IF child#NIL AND child.last AND child.child=NIL THEN { -- reuse rather than reallocate
RemoveProps: PROC [name: ATOM, value: REF] RETURNS [BOOLEAN] = {
IF name#$DocumentLock AND name#$Viewer 
AND ~(op=$KeepRootStyleProps AND (name=$Prefix OR name=$Postfix))
THEN NodeProps.PutProp[root, name, NIL];
RETURN [FALSE] };
rootProps: TextNode.NodeProps;
<<Should really have a write lock on the document for this.  change for Tioga2.>>
child^ _ nullNode^;
rootProps _ root.props; root^ _ nullNode^; root.props _ rootProps;
root.child _ child; child.next _ root;
root.last _ child.last _ TRUE; child.rope _ rope;
IF op = $KeepRootStyleProps THEN root.typename _ typename;
[] _ NodeProps.MapProps[root, RemoveProps, FALSE, FALSE] }
ELSE {
prefix, postfix: REF;
IF op=$KeepRootStyleProps THEN {
prefix _ NodeProps.GetProp[root, $Prefix];
postfix _ NodeProps.GetProp[root, $Postfix] };
TEditInput.FreeTree[root];
tdd.text _ TextNode.NarrowToTextNode[
TextEdit.DocFromNode[TextEdit.FromRope[rope]]];
IF op=$KeepRootStyleProps THEN {
IF prefix#NIL THEN NodeProps.PutProp[tdd.text, $Prefix, prefix];
IF postfix#NIL THEN NodeProps.PutProp[tdd.text, $Postfix, postfix];
tdd.text.typename _ typename };
}
}
ELSE IF op=$TiogaContents THEN {
info: ViewerTools.TiogaContents _ NARROW[data];
rope _ Rope.Concat[info.contents, info.formatting];
TEditInput.FreeTree[tdd.text];
tdd.text _ TextNode.NarrowToTextNode[PutGet.FromRope[rope]] }
ELSE IF op=$TiogaDocument THEN {
root: TextNode.RefTextNode _ NARROW[data];
TEditInput.FreeTree[tdd.text];
tdd.text _ root }
ELSE ERROR;
tdd.lineTable.lastLine _ 0;
tdd.lineTable[0].pos _ [TextNode.NarrowToTextNode[TextNode.FirstChild[tdd.text]], 0];
RecordViewerForRoot[self,tdd.text];
self.newVersion _ FALSE;    -- clear edited bit
IF finalise THEN ViewerOps.PaintViewer[self, all, TRUE, TEditTouchup.fullUpdate];
Unlock[tdd];
END
ELSE IF op = $SelPos THEN BEGIN OPEN TEditSelection;
IF ~self.iconic THEN BEGIN        -- no iconic selections please
tSel: TEditDocument.Selection _ TEditSelection.Alloc[];
sel: ViewerTools.SelPos _ NARROW[data];
start, length: INT;
[] _ TEditLocks.LockDocAndTdd[tdd, "SetTEditDocument", read];
IF sel=NIL THEN BEGIN
IF tdd.tsInfo#NIL THEN { -- for typescripts, NIL => caret at end
start _ TextNode.LocNumber[ -- includes 1 for root, so must subtract 1
at: TextNode.LastLocWithin[tdd.text], skipCommentNodes: TRUE];
length _ 0 }
ELSE { -- for other text viewers, NIL => entire contents
start _ 0;
length _ TextNode.LocNumber[ -- includes 1 for root, so must subtract 1
at: TextNode.LastLocWithin[tdd.text], skipCommentNodes: TRUE]-1};
END
ELSE {
tiogaFile: BOOL _ (NodeProps.GetProp[tdd.text, $FromTiogaFile] = $Yes);
start _ sel.start;
IF ~tiogaFile THEN start _ start+1;  -- hack to compensate for leading CR
length _ sel.length };
tSel.start.pos _ TextNode.LocWithin[n: tdd.text, count: start, skipCommentNodes: TRUE];
tSel.end.pos _ TextNode.LocRelative[
location: tSel.start.pos, count: MAX[length-1, 0], skipCommentNodes: TRUE];
TEditLocks.UnlockDocAndTdd[tdd];
tSel.granularity _ IF length=0 THEN point ELSE char;
tSel.viewer _ self;
tSel.data _ tdd;
tSel.insertion _ IF length=0 THEN before ELSE after;
tSel.pendingDelete _ TRUE;
tSel.looks _ TextLooks.noLooks;
TEditSelection.MakeSelection[new: tSel];
TEditSelection.Free[tSel];
TEditRefresh.ScrollToEndOfSel[self, FALSE];
END;
END
ELSE IF op = $ReadOnly THEN BEGIN
self.tipTable _ readonlyTIP;
tdd.readOnly _ TRUE;
END
ELSE IF op = $ReadWrite THEN BEGIN
self.tipTable _ tiogaTIP;
tdd.readOnly _ FALSE;
END
ELSE ERROR;
END;

GetTEditDocument: GetProc = BEGIN
tdd: TEditDocumentData = NARROW[self.data];
IF op=NIL THEN {
node: TextNode.RefTextNode = TextNode.NarrowToTextNode[tdd.text.child];
IF node#NIL AND node.last AND node.child=NIL THEN -- simple case of only one node
RETURN [node.rope];
RETURN [PutGet.WriteRopePlain[tdd.text]] };
IF op = $TiogaContents THEN {
contents, formatting: Rope.ROPE;
dataLen, count: INT;
[dataLen, count, contents] _ PutGet.ToRope[tdd.text];
formatting _ Rope.Substr[base: contents, start: dataLen, len: count-dataLen];
contents _ Rope.Substr[base: contents, start: 0, len: dataLen];
RETURN [TextNode.pZone.NEW[ViewerTools.TiogaContentsRec _ [contents, formatting]]] };
IF op = $SelChars THEN BEGIN OPEN TEditSelection;
rope: Rope.ROPE;    -- hack to fix compiler problem
DoSelChars: PROC [root: TextEdit.Ref, tSel: Selection] = {
SelConcat: PROC [node: TextNode.RefTextNode, start, len: TextNode.Offset]
RETURNS [stop: BOOLEAN] = {
rope _ IF rope = NIL THEN Rope.Substr[node.rope, start, len]
ELSE Rope.Cat[rope, "\n", Rope.Substr[node.rope, start, len]];
RETURN [FALSE] };
IF tSel.viewer # NIL AND tSel.granularity # point THEN 
EditSpanSupport.Apply[[tSel.start.pos, tSel.end.pos], SelConcat];
IF rope=NIL THEN rope _ "" };
TEditInputOps.CallWithLocks[DoSelChars, read];
RETURN[rope];
END
ELSE IF op = $SelPos THEN BEGIN OPEN TEditSelection;
sel: ViewerTools.SelPos _ TextNode.pZone.NEW[ViewerTools.SelPosRec];
DoSelPos: PROC [root: TextEdit.Ref, tSel: Selection] = {
sel.start _ TextNode.LocNumber[at: tSel.start.pos, skipCommentNodes: TRUE];
sel.length _ TextNode.LocOffset[
loc1: tSel.start.pos, loc2: tSel.end.pos, skipCommentNodes: TRUE] };
TEditInputOps.CallWithLocks[DoSelPos, read];
RETURN[sel];
END
ELSE ERROR;
END;

DestroyTEditDocument: DestroyProc = {
ForgetViewer[self]; -- this also fixes up the Root => Viewer mapping if necessary
IF self.link # NIL THEN RETURN; -- linked, so not finished with document yet
TRUSTED {Process.Detach[FORK CleanupAfterDestroy[self, self.file, NARROW[self.data]]] }};
<<Need to pass self.file as variable because it will be set to NIL>>

CleanupAfterDestroy: PROC [self: Viewer, file: Rope.ROPE, tdd: TEditDocument.TEditDocumentData] = {
root: TextNode.Ref;
IF tdd = NIL THEN RETURN;    -- anybody remember why this is here (SM)?
[] _ SpinAndLock[tdd, "DestroyTEditDocument"];
root _ tdd.text;
IF self.newVersion AND ~self.saveInProgress AND file # NIL THEN
RecordUnsavedDocument[file, root]
ELSE TEditInput.FreeTree[root];
Unlock[tdd] };

ChangeMenu: PROC [viewer: Viewer, subMenu: MenuEntry] = {
menu: Menus.Menu _ viewer.menu;
found: BOOLEAN _ FALSE;
numLines: Menus.MenuLine = Menus.GetNumberOfLines[menu];
newLines: Menus.MenuLine _ numLines;
FOR i: Menus.MenuLine IN [1..numLines) DO -- see if already showing the submenu
IF Rope.Equal[Menus.GetLine[menu,i].name, subMenu.name] THEN { -- yes, so remove it
FOR j: Menus.MenuLine IN (i..numLines) DO
Menus.SetLine[menu, j-1, Menus.GetLine[menu, j]];
ENDLOOP;
<<Menus.ChangeNumberOfLines[menu, newLast-1];>>
newLines _ newLines-1;
found _ TRUE; EXIT };
ENDLOOP;
IF ~found THEN { -- add it.  do insertion sort to get it in the right place
GoesBefore: PROC [m1, m2: MenuEntry] RETURNS [BOOL] = {
Priority: PROC [m: MenuEntry] RETURNS [INTEGER] = {
<<higher priority means goes above in series of submenus>>
<<looks at rope for first item to identify the subMenu.>>
RETURN [SELECT TRUE FROM
Rope.Equal[m.name, "Find"] => 1,
Rope.Equal[m.name, "FirstLevelOnly"] => 0,
ENDCASE => -1 -- unknown menu goes at bottom -- ] };
RETURN [Priority[m1] > Priority[m2]] };
newLast: Menus.MenuLine = MIN[numLines, LAST[Menus.MenuLine]];
newLines _ newLines+1;
<<Menus.ChangeNumberOfLines[menu, newLast+1];>>
FOR i: Menus.MenuLine IN [1..numLines) DO
IF GoesBefore[subMenu, Menus.GetLine[menu, i]] THEN { -- put it here
FOR j: Menus.MenuLine DECREASING IN (i..newLast] DO
Menus.SetLine[menu, j, Menus.GetLine[menu, j-1]]; ENDLOOP;
Menus.SetLine[menu, i, subMenu];
found _ TRUE; EXIT };
ENDLOOP;
IF ~found THEN Menus.SetLine[menu, newLast, subMenu];
};
<<ViewerOps.EstablishViewerPosition[viewer, viewer.wx, viewer.wy, viewer.ww, viewer.wh];>>
<<ViewerOps.PaintViewer[viewer, all];>>
ViewerBLT.ChangeNumberOfLines[viewer, newLines];
};

LevelMenu: PUBLIC Menus.MenuProc = { ChangeMenu[NARROW[parent], levelMenu] };

FindMenu: PUBLIC Menus.MenuProc = { ChangeMenu[NARROW[parent], findMenu] };

unlocked: CONDITION;

SpinAndLock: PUBLIC ENTRY PROC [tdd: TEditDocumentData, who: Rope.ROPE,
interrupt, defer: BOOL _ FALSE]
RETURNS [ok: BOOL] = TRUSTED BEGIN
ENABLE UNWIND => NULL;
myProcess: PROCESS = LOOPHOLE[Process.GetCurrent[]];
IF myProcess#tdd.lockProcess THEN BEGIN
IF interrupt THEN {
IF defer AND tdd.interrupt > 0 THEN RETURN [FALSE];
tdd.interrupt _ tdd.interrupt+1 };
WHILE tdd.lock>0 DO WAIT unlocked; ENDLOOP;
tdd.lockProcess _ myProcess;
tdd.who _ who; -- save the first guy who got the lock 
IF interrupt THEN tdd.interrupt _ tdd.interrupt-1;
END;
tdd.lock _ tdd.lock+1;
RETURN [TRUE];
END;

Unlock: PUBLIC ENTRY PROC [tdd: TEditDocumentData] = TRUSTED {
ENABLE UNWIND => NULL;
IF tdd.lockProcess # Process.GetCurrent[] THEN ERROR;
IF (tdd.lock _ tdd.lock-1) = 0 THEN BROADCAST unlocked };

ReloadTipTable: PUBLIC PROC = BEGIN
newTIP: TIPUser.TIPTable _
ReloadTable[tiogaTIP, "TiogaTIP", "[]<>Tioga.tip"];
IF newTIP#NIL THEN ChangeTipTables[tiogaClass.tipTable _ tiogaTIP _ newTIP, FALSE];
END;

ReloadReadonlyTipTable: PUBLIC PROC = BEGIN
newTIP: TIPUser.TIPTable _
ReloadTable[readonlyTIP, "ReadonlyTiogaTIP", "[]<>ReadonlyTioga.tip"];
IF newTIP # NIL THEN ChangeTipTables[readonlyTIP _ newTIP, TRUE];
END;

readonlyTIP: TIPUser.TIPTable;
tiogaTIP: PUBLIC TIPUser.TIPTable;

ChangeTipTables: PROC [newTIP: TIPUser.TIPTable, readonly: BOOL] = {
changeTip: PROC [v: Viewer] RETURNS [BOOL _ TRUE] = {
SELECT v.class.flavor FROM
$Text => {
tdd: TEditDocumentData _ NARROW[v.data];
IF tdd.readOnly=readonly THEN v.tipTable _ newTIP };
$Container => ViewerOps.EnumerateChildren[v, changeTip];
ENDCASE };
VirtualDesktops.EnumerateViewers[changeTip] };

ReloadTable: PUBLIC PROC [oldTIP: TIPUser.TIPTable, profileKey, default: Rope.ROPE]
RETURNS [newTIP: TIPUser.TIPTable] = {
ok: BOOL _ TRUE;
AddTable: PROC [r: Rope.ROPE] = {
bad: BOOLEAN _ FALSE;
t: TIPUser.TIPTable;
msg: Rope.ROPE;
IF ~ok THEN RETURN;
IF Rope.Equal[r,"default",FALSE] THEN {
TEditProfile.DoList["", AddTable, default];
RETURN };
t _ TIPUser.InstantiateNewTIPTable[r !
FS.Error => {
bad _ TRUE; 
msg _ Rope.Concat["Cannot read TIP table file: ", r];
CONTINUE};
TIPUser.InvalidTable => {
bad _ TRUE;
msg _ Rope.Concat["Error(s) saved on TIP.Errors for: ", r];
CONTINUE}];
IF bad THEN { ok _ FALSE; MessageWindow.Append[msg, TRUE]; RETURN };
IF newTIP=NIL THEN { newTIP _ t; RETURN };
FOR x: TIPUser.TIPTable _ newTIP, x.link UNTIL x=NIL DO
FOR y: TIPUser.TIPTable _ t, y.link UNTIL y=NIL DO
IF x # y THEN LOOP;
ok _ FALSE;
MessageWindow.Append[Rope.Concat["Loop in TIP table layers caused by ", r], TRUE];
RETURN;
ENDLOOP;
ENDLOOP;
FOR x: TIPUser.TIPTable _ newTIP, x.link UNTIL x.link=NIL DO
REPEAT FINISHED => BEGIN
newTIP.mouseTicks _ MIN[t.mouseTicks, newTIP.mouseTicks];
x.opaque _ FALSE;
x.link _ t;
END;
ENDLOOP;
};
TEditProfile.DoList[profileKey, AddTable, default];
IF ~ok AND oldTIP=NIL THEN { -- try the default by itself
ok _ TRUE; TEditProfile.DoList["", AddTable, default] };
};

tiogaClass: ViewerClass _ NEW[ViewerClassRec _ [
paint: TEditImpl.PaintTEditDocument,
bltContents: top,        -- use blt to copy screen contents to top of viewer when change dimensions
notify: TEditImpl.TEditNotifyProc,
modify: TEditSelection.InputModify,
init: InitTEditDocument,
set: SetTEditDocument,
get: GetTEditDocument,
save: SaveTEditDocument,
destroy: DestroyTEditDocument,
scroll: TEditScrolling.ScrollTEditDocument
<<-- tipTable set below>>
]];

tiogaMenu: PUBLIC Menus.Menu _ Menus.CreateMenu[];

findMenu, levelMenu, lineMenu: PUBLIC MenuEntry;

--preSave: REF Menus.ClickProc = NEW[Menus.ClickProc _ PreSave];
preReset: REF Menus.ClickProc = NEW[Menus.ClickProc _ PreReset];
--preClear: REF Menus.ClickProc = NEW[Menus.ClickProc _ PreClear];
preStore: REF Menus.ClickProc = NEW[Menus.ClickProc _ PreStore];
--preLoadPrevious: REF Menus.ClickProc = NEW[Menus.ClickProc _ PreLoadPrevious];
--preGet: REF Menus.ClickProc = NEW[Menus.ClickProc _ PreGet];
--preGetImpl: REF Menus.ClickProc = NEW[Menus.ClickProc _ PreGetImpl];

<<-- first row>>
Menus.AppendMenuEntry[menu: tiogaMenu, entry: Menus.CreateEntry[name: "Clear", proc: Clear
--, guarded: TRUE, documentation: preClear--]];
Menus.AppendMenuEntry[menu: tiogaMenu,
entry: Menus.CreateEntry[name: "Reset", proc: Reset, guarded: TRUE, documentation: preReset]];
Menus.AppendMenuEntry[menu: tiogaMenu, entry: Menus.CreateEntry[name: "Get", proc: Get
--, guarded: TRUE, documentation: preGet--]];
Menus.AppendMenuEntry[menu: tiogaMenu,
entry: Menus.CreateEntry[name: "GetImpl", proc: GetImpl
--,guarded: TRUE, documentation: preGetImpl--]];
Menus.AppendMenuEntry[menu: tiogaMenu,
entry: Menus.CreateEntry[name: "PrevFile", proc: PreviousFile
--,guarded: TRUE, documentation: preLoadPrevious--]];
Menus.AppendMenuEntry[menu: tiogaMenu,
entry: Menus.CreateEntry[name: "Store", proc: Store, guarded: TRUE, documentation: preStore]];
Menus.AppendMenuEntry[menu: tiogaMenu, entry: Menus.CreateEntry[name: "Save", proc: Save
--, guarded: TRUE, documentation: preSave--]];
Menus.AppendMenuEntry[tiogaMenu, Menus.CreateEntry["Time", Time]];
Menus.AppendMenuEntry[tiogaMenu, Menus.CreateEntry["Split", Split]];
Menus.AppendMenuEntry[tiogaMenu, Menus.CreateEntry["Places", FindMenu]];
Menus.AppendMenuEntry[tiogaMenu, Menus.CreateEntry["Levels", LevelMenu]];

<<-- build the places menu>>
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["Reselect", Reselect], 1];
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["PrevPlace", JumpToPrevious], 1];
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["Normalize", Normalize], 1];
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["Position", Position], 1];
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["Def", FindDef], 1];
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["Word", FindWord], 1];
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["Find", Find], 1];

findMenu _ Menus.GetLine[tiogaMenu, 1];
Menus.SetLine[tiogaMenu, 1, NIL];

<<-- build the levels menu>>
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["AllLevels", AllLevels], 1];
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["FewerLevels", FewerLevels], 1];
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["MoreLevels", MoreLevels], 1];
Menus.InsertMenuEntry[tiogaMenu, Menus.CreateEntry["FirstLevelOnly", FirstLevelOnly], 1];

levelMenu _ Menus.GetLine[tiogaMenu, 1];
Menus.SetLine[tiogaMenu, 1, NIL];

----
Menus.ChangeNumberOfLines[tiogaMenu, 1];    -- only show the top level to start

ReloadTipTable[]; ReloadReadonlyTipTable[];

ViewerOps.RegisterViewerClass [$Text, tiogaClass];

[] _ Buttons.Create[info: [name: "New"], proc: NewButton, fork: FALSE];
<<don't fork since will change the selection; want to capture following typein>>

[] _ Buttons.Create[info: [name: "Open"], proc: OpenButton];

END.

PreSave: PUBLIC Menus.MenuProc = {
viewer: ViewerClasses.Viewer = NARROW[parent];
tdd: TEditDocumentData _ NARROW[viewer.data];
root: TextNode.Ref;
file: Rope.ROPE = viewer.name;
IF file=NIL THEN BEGIN
MessageWindow.Append["Can't SAVE -- no file name!", TRUE];
MessageWindow.Blink[];
ViewerOps.SetNewVersion[viewer]; -- turn the bit back on
RETURN;
END;
IF tdd.readOnly THEN BEGIN
MessageWindow.Append["Can't SAVE -- read only document!", TRUE];
MessageWindow.Blink[];
RETURN;
END;
[] _ SpinAndLock[tdd, "PreSave"]; -- may have other operation in progress
root _ tdd.text;
Unlock[tdd];
IF FileIsMoreRecent[root, file] THEN { -- the create date of the file on the disk
MessageWindow.Append[Rope.Concat[file," on disk is newer than this one."], TRUE];
MessageWindow.Blink[] }
ELSE MessageWindow.Append[Rope.Concat["Confirm save of ", file], TRUE];
};