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TVEDIT.PAS
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Pascal/Delphi Source File
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1991-06-11
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11KB
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398 lines
{************************************************}
{ }
{ Turbo Pascal 6.0 }
{ Turbo Vision Editor Demo }
{ Copyright (c) 1990 by Borland International }
{ }
{************************************************}
program TVEdit;
{$M 8192,8192,655360}
{$X+,S-}
{ This program demonstrates the use of the Buffers and Editors
units. See also BUFFERS.DOC and EDITORS.DOC in the \TP\DOC
directory.
}
uses Dos, Objects, Drivers, Memory, Views, Menus, Dialogs,
StdDlg, MsgBox, App, Calc, Buffers, Editors;
const
HeapSize = 32 * (1024 div 16);
const
cmOpen = 100;
cmNew = 101;
cmChangeDir = 102;
cmDosShell = 103;
cmCalculator = 104;
cmShowClip = 105;
type
PEditorApp = ^TEditorApp;
TEditorApp = object(TApplication)
constructor Init;
destructor Done; virtual;
procedure HandleEvent(var Event: TEvent); virtual;
procedure InitMenuBar; virtual;
procedure InitStatusLine; virtual;
procedure OutOfMemory; virtual;
end;
var
EditorApp: TEditorApp;
ClipWindow: PEditWindow;
function ExecDialog(P: PDialog; Data: Pointer): Word;
var
Result: Word;
begin
Result := cmCancel;
P := PDialog(Application^.ValidView(P));
if P <> nil then
begin
if Data <> nil then P^.SetData(Data^);
Result := DeskTop^.ExecView(P);
if (Result <> cmCancel) and (Data <> nil) then P^.GetData(Data^);
Dispose(P, Done);
end;
ExecDialog := Result;
end;
function CreateFindDialog: PDialog;
var
D: PDialog;
Control: PView;
R: TRect;
begin
R.Assign(0, 0, 38, 12);
D := New(PDialog, Init(R, 'Find'));
with D^ do
begin
Options := Options or ofCentered;
R.Assign(3, 3, 32, 4);
Control := New(PInputLine, Init(R, 80));
Insert(Control);
R.Assign(2, 2, 15, 3);
Insert(New(PLabel, Init(R, '~T~ext to find', Control)));
R.Assign(32, 3, 35, 4);
Insert(New(PHistory, Init(R, PInputLine(Control), 10)));
R.Assign(3, 5, 35, 7);
Insert(New(PCheckBoxes, Init(R,
NewSItem('~C~ase sensitive',
NewSItem('~W~hole words only', nil)))));
R.Assign(14, 9, 24, 11);
Insert(New(PButton, Init(R, 'O~K~', cmOk, bfDefault)));
Inc(R.A.X, 12); Inc(R.B.X, 12);
Insert(New(PButton, Init(R, 'Cancel', cmCancel, bfNormal)));
SelectNext(False);
end;
CreateFindDialog := D;
end;
function CreateReplaceDialog: PDialog;
var
D: PDialog;
Control: PView;
R: TRect;
begin
R.Assign(0, 0, 40, 16);
D := New(PDialog, Init(R, 'Replace'));
with D^ do
begin
Options := Options or ofCentered;
R.Assign(3, 3, 34, 4);
Control := New(PInputLine, Init(R, 80));
Insert(Control);
R.Assign(2, 2, 15, 3);
Insert(New(PLabel, Init(R, '~T~ext to find', Control)));
R.Assign(34, 3, 37, 4);
Insert(New(PHistory, Init(R, PInputLine(Control), 10)));
R.Assign(3, 6, 34, 7);
Control := New(PInputLine, Init(R, 80));
Insert(Control);
R.Assign(2, 5, 12, 6);
Insert(New(PLabel, Init(R, '~N~ew text', Control)));
R.Assign(34, 6, 37, 7);
Insert(New(PHistory, Init(R, PInputLine(Control), 11)));
R.Assign(3, 8, 37, 12);
Insert(New(PCheckBoxes, Init(R,
NewSItem('~C~ase sensitive',
NewSItem('~W~hole words only',
NewSItem('~P~rompt on replace',
NewSItem('~R~eplace all', nil)))))));
R.Assign(17, 13, 27, 15);
Insert(New(PButton, Init(R, 'O~K~', cmOk, bfDefault)));
R.Assign(28, 13, 38, 15);
Insert(New(PButton, Init(R, 'Cancel', cmCancel, bfNormal)));
SelectNext(False);
end;
CreateReplaceDialog := D;
end;
function DoEditDialog(Dialog: Integer; Info: Pointer): Word; far;
var
R: TRect;
T: TPoint;
begin
case Dialog of
edOutOfMemory:
DoEditDialog := MessageBox('Not enough memory for this operation.',
nil, mfError + mfOkButton);
edReadError:
DoEditDialog := MessageBox('Error reading file %s.',
@Info, mfError + mfOkButton);
edWriteError:
DoEditDialog := MessageBox('Error writing file %s.',
@Info, mfError + mfOkButton);
edCreateError:
DoEditDialog := MessageBox('Error creating file %s.',
@Info, mfError + mfOkButton);
edSaveModify:
DoEditDialog := MessageBox('%s has been modified. Save?',
@Info, mfInformation + mfYesNoCancel);
edSaveUntitled:
DoEditDialog := MessageBox('Save untitled file?',
nil, mfInformation + mfYesNoCancel);
edSaveAs:
DoEditDialog := ExecDialog(New(PFileDialog, Init('*.*',
'Save file as', '~N~ame', fdOkButton, 101)), Info);
edFind:
DoEditDialog := ExecDialog(CreateFindDialog, Info);
edSearchFailed:
DoEditDialog := MessageBox('Search string not found.',
nil, mfError + mfOkButton);
edReplace:
DoEditDialog := ExecDialog(CreateReplaceDialog, Info);
edReplacePrompt:
begin
{ Avoid placing the dialog on the same line as the cursor }
R.Assign(0, 1, 40, 8);
R.Move((Desktop^.Size.X - R.B.X) div 2, 0);
Desktop^.MakeGlobal(R.B, T);
Inc(T.Y);
if TPoint(Info).Y <= T.Y then
R.Move(0, Desktop^.Size.Y - R.B.Y - 2);
DoEditDialog := MessageBoxRect(R, 'Replace this occurence?',
nil, mfYesNoCancel + mfInformation);
end;
end;
end;
function OpenEditor(FileName: FNameStr; Visible: Boolean): PEditWindow;
var
P: PView;
R: TRect;
begin
DeskTop^.GetExtent(R);
P := Application^.ValidView(New(PEditWindow,
Init(R, FileName, wnNoNumber)));
if not Visible then P^.Hide;
DeskTop^.Insert(P);
OpenEditor := PEditWindow(P);
end;
constructor TEditorApp.Init;
var
H: Word;
R: TRect;
begin
H := PtrRec(HeapEnd).Seg - PtrRec(HeapPtr).Seg;
if H > HeapSize then BufHeapSize := H - HeapSize else BufHeapSize := 0;
InitBuffers;
TApplication.Init;
DisableCommands([cmSave, cmSaveAs, cmCut, cmCopy, cmPaste, cmClear,
cmUndo, cmFind, cmReplace, cmSearchAgain]);
EditorDialog := DoEditDialog;
ClipWindow := OpenEditor('', False);
if ClipWindow <> nil then
begin
Clipboard := ClipWindow^.Editor;
Clipboard^.CanUndo := False;
end;
end;
destructor TEditorApp.Done;
begin
TApplication.Done;
DoneBuffers;
end;
procedure TEditorApp.HandleEvent(var Event: TEvent);
procedure FileOpen;
var
FileName: FNameStr;
begin
FileName := '*.*';
if ExecDialog(New(PFileDialog, Init('*.*', 'Open file',
'~N~ame', fdOpenButton, 100)), @FileName) <> cmCancel then
OpenEditor(FileName, True);
end;
procedure FileNew;
begin
OpenEditor('', True);
end;
procedure ChangeDir;
begin
ExecDialog(New(PChDirDialog, Init(cdNormal, 0)), nil);
end;
procedure DosShell;
begin
DoneSysError;
DoneEvents;
DoneVideo;
DoneMemory;
SetMemTop(Ptr(BufHeapPtr, 0));
PrintStr('Type EXIT to return to TVEDIT...');
SwapVectors;
Exec(GetEnv('COMSPEC'), '');
SwapVectors;
SetMemTop(Ptr(BufHeapEnd, 0));
InitMemory;
InitVideo;
InitEvents;
InitSysError;
Redraw;
end;
procedure ShowClip;
begin
ClipWindow^.Select;
ClipWindow^.Show;
end;
procedure Tile;
var
R: TRect;
begin
Desktop^.GetExtent(R);
Desktop^.Tile(R);
end;
procedure Cascade;
var
R: TRect;
begin
Desktop^.GetExtent(R);
Desktop^.Cascade(R);
end;
procedure Calculator;
begin
DeskTop^.Insert(ValidView(New(PCalculator, Init)));
end;
begin
TApplication.HandleEvent(Event);
case Event.What of
evCommand:
case Event.Command of
cmOpen: FileOpen;
cmNew: FileNew;
cmChangeDir: ChangeDir;
cmDosShell: DosShell;
cmCalculator: Calculator;
cmShowClip: ShowClip;
cmTile: Tile;
cmCascade: Cascade;
else
Exit;
end;
else
Exit;
end;
ClearEvent(Event);
end;
procedure TEditorApp.InitMenuBar;
var
R: TRect;
begin
GetExtent(R);
R.B.Y := R.A.Y + 1;
MenuBar := New(PMenuBar, Init(R, NewMenu(
NewSubMenu('~F~ile', hcNoContext, NewMenu(
NewItem('~O~pen...', 'F3', kbF3, cmOpen, hcNoContext,
NewItem('~N~ew', '', kbNoKey, cmNew, hcNoContext,
NewItem('~S~ave', 'F2', kbF2, cmSave, hcNoContext,
NewItem('S~a~ve as...', '', kbNoKey, cmSaveAs, hcNoContext,
NewLine(
NewItem('~C~hange dir...', '', kbNoKey, cmChangeDir, hcNoContext,
NewItem('~D~OS shell', '', kbNoKey, cmDosShell, hcNoContext,
NewItem('E~x~it', 'Alt-X', kbAltX, cmQuit, hcNoContext,
nil))))))))),
NewSubMenu('~E~dit', hcNoContext, NewMenu(
NewItem('~U~ndo', '', kbNoKey, cmUndo, hcNoContext,
NewLine(
NewItem('Cu~t~', 'Shift-Del', kbShiftDel, cmCut, hcNoContext,
NewItem('~C~opy', 'Ctrl-Ins', kbCtrlIns, cmCopy, hcNoContext,
NewItem('~P~aste', 'Shift-Ins', kbShiftIns, cmPaste, hcNoContext,
NewItem('~S~how clipboard', '', kbNoKey, cmShowClip, hcNoContext,
NewLine(
NewItem('~C~lear', 'Ctrl-Del', kbCtrlDel, cmClear, hcNoContext,
nil))))))))),
NewSubMenu('~S~earch', hcNoContext, NewMenu(
NewItem('~F~ind...', '', kbNoKey, cmFind, hcNoContext,
NewItem('~R~eplace...', '', kbNoKey, cmReplace, hcNoContext,
NewItem('~S~earch again', '', kbNoKey, cmSearchAgain, hcNoContext,
nil)))),
NewSubMenu('~W~indows', hcNoContext, NewMenu(
NewItem('~S~ize/move','Ctrl-F5', kbCtrlF5, cmResize, hcNoContext,
NewItem('~Z~oom', 'F5', kbF5, cmZoom, hcNoContext,
NewItem('~T~ile', '', kbNoKey, cmTile, hcNoContext,
NewItem('C~a~scade', '', kbNoKey, cmCascade, hcNoContext,
NewItem('~N~ext', 'F6', kbF6, cmNext, hcNoContext,
NewItem('~P~revious', 'Shift-F6', kbShiftF6, cmPrev, hcNoContext,
NewItem('~C~lose', 'Alt-F3', kbAltF3, cmClose, hcNoContext,
NewLine(
NewItem('Ca~l~culator', '', kbNoKey, cmCalculator, hcNoContext,
nil)))))))))),
nil)))))));
end;
procedure TEditorApp.InitStatusLine;
var
R: TRect;
begin
GetExtent(R);
R.A.Y := R.B.Y - 1;
New(StatusLine, Init(R,
NewStatusDef(0, $FFFF,
NewStatusKey('~F2~ Save', kbF2, cmSave,
NewStatusKey('~F3~ Open', kbF3, cmOpen,
NewStatusKey('~Alt-F3~ Close', kbAltF3, cmClose,
NewStatusKey('~F5~ Zoom', kbF5, cmZoom,
NewStatusKey('~F6~ Next', kbF6, cmNext,
NewStatusKey('~F10~ Menu', kbF10, cmMenu,
NewStatusKey('', kbCtrlF5, cmResize,
nil))))))),
nil)));
end;
procedure TEditorApp.OutOfMemory;
begin
MessageBox('Not enough memory for this operation.',
nil, mfError + mfOkButton);
end;
begin
EditorApp.Init;
EditorApp.Run;
EditorApp.Done;
end.