gambas-source-code/comp/src/gb.form.editor/.src/CCommand.class

' Gambas class file

Public Enum BEGIN, {END}, INSERT, DELETE

'Public View As Editor
Public Type As Integer
Public X As Integer
Public Y As Integer
Public SX As Integer
Public SY As Integer
Public XA As Integer
Public YA As Integer
Public Text As String

' /**---- GCommand -----------------------------------------------------------*/
' 
' struct GCommandDocument
' {
' public:
'   GEditor *view;
'   int cx;
'   int cy;
'   int sx;
'   int sy;
'   int sx2;
'   int sy2;
'   
'   GCommandDocument() { }
'   GCommandDocument(GDocument *doc);
'   void process(GDocument *doc) const;
'   void print() const;
'   bool equals(GCommandDocument *o) const;
' };
' 

Public Sub _new(hDoc As CDocument, iType As Integer, Optional sText As String, X1 As Integer, Y1 As Integer, X2 As Integer, Y2 As Integer)
  
  With hDoc.Current
    Type = iType
    X = X1
    Y = Y1
    XA = X2
    YA = Y2
    SX = .SelectionColumn
    SY = .SelectionLine
    Text = sText
  End With
  
End

Public Sub Print(sPrefix As String)
  
  Print sPrefix;
  Print ["BEGIN", "END", "INSERT", "DELETE"][Type];;
  Print "X =";; X;; "Y =";; Y;; "SX =";; SX;; "SY =";; SY;; "XA =";; XA;; "YA =";; YA;; "Text =";; Quote(Text)
  
End

Static Public Sub _call(hDoc As CDocument, iType As Integer, Optional sText As String, X1 As Integer, Y1 As Integer, X2 As Integer, Y2 As Integer) As CCommand
  
  Return New CCommand(hDoc, iType, sText, X1, Y1, X2, Y2)

End

Public Sub MoveCursor(hDoc As CDocument)

  If SX <> X Or If SY <> Y Then 
    hDoc.Current.Goto(SX, SY)
    hDoc.Current.Goto(X, Y, True)
  Else
    hDoc.Current.Goto(X, Y)
  Endif

  
End


' GCommandDocument::GCommandDocument(GDocument *doc)
' {
'   view = doc->currentView();
'   
'   view->getCursor(&cy, &cx);
'   
'   if (doc->hasSelection())
'     doc->getSelection(&sy, &sx, &sy2, &sx2, false); // TODO: store insertMode
'   else
'     sx = sy = sx2 = sy2 = -1;
' }
' 
' void GCommandDocument::process(GDocument *doc) const
' {
'   //qDebug("goto %d %d", cx, cy);
'   view->cursorGoto(cy, cx, false);
'   if (sx >= 0)
'   {
'     //qDebug("select %d %d %d %d", sx, sy, sx2, sy2);
'     doc->startSelection(view, sy, sx);
'     doc->endSelection(sy2, sx2);
'   }
' }
' 
' void GCommandDocument::print() const
' {
'   qDebug("- %d %d [%d %d %d %d]", cx, cy, sx, sy, sx2, sy2);
' }
' 

' Public Sub Equals(hOther As CCommand) As Boolean
'   
'   If hOther.X = X And If hOther.Y = Y And If hOther.SX = SX And If hOther.SY = SY Then Return True
'   
' End


' bool GCommandDocument::equals(GCommandDocument *o) const
' {
'   return view == o->view && cx == o->cx && cy == o->cy 
'     && sx == o->sx && sy == o->sy && sx2 == o->sx2 && sy2 == o->sy2;
' }
' 
' class GCommand
' {
' public:
'   enum Type
'   {
'     None, Begin, End, Move, Insert, Delete, Indent, Unindent
'   };
'   GCommandDocument info;
' 
'   virtual ~GCommand() { }
'   virtual Type type() const { return None; }
'   virtual int nest() const { return 0; }
'   virtual void print() const { }
'   virtual bool merge(GCommand *) const { return false; }
'   virtual void process(GDocument *doc, bool undo) const { }
'   virtual bool linked() const { return false; }
'   virtual bool remove(GCommand *) const { return false; }
' };
' 
' class GBeginCommand: public GCommand
' {
' public:
'   bool _linked;
'   
'   GBeginCommand(GCommandDocument *info, bool linked = false) { _linked = linked; this->info = *info; }
'   Type type() const { return Begin; }
'   void print() const { qDebug("Begin"); info.print(); }
'   int nest() const { return 1; }
'   bool linked() const { return _linked; }
'   void process(GDocument *doc, bool undo) const { info.process(doc); }
' };
' 
' class GEndCommand: public GCommand
' {
' public:
'   bool _linked;
' 
'   GEndCommand(bool linked = false) { _linked = linked; }
'   Type type() const { return End; }
'   void print() const { qDebug("End"); }
'   int nest() const { return -1; }
'   bool linked() const { return _linked; }
'   bool remove(GCommand *o) const { return (o->type() == Begin); }
' };
' 
' class GDeleteCommand: public GCommand
' {
' public:
'   int x, y, x2, y2;
'   GString str;
' 
'   GDeleteCommand(GCommandDocument *info, int y, int x, int y2, int x2, const GString &str)
'   {
'     this->x = x; this->y = y; this->x2 = x2; this->y2 = y2; this->str = str;
'     this->info = *info;
'   }
'   
'   Type type() const { return Delete; }
'   void print() const { qDebug("Delete: (%d %d)-(%d %d): '%s'", x, y, x2, y2, TO_UTF8(str.getString())); info.print(); }
' 
'   bool merge(GCommand *c) const
'   {
'     if (c->type() != type())
'       return false;
' 
'     GDeleteCommand *o = (GDeleteCommand *)c;
'     
'     if (info.view != o->info.view)
'       return false;
' 
'     if (x2 != o->x || y2 != o->y || o->y != o->y2)
'       return false;
' 
'     o->str.prepend(str);
'     o->x = x;
'     o->y = y;
'     //o->info = info;
'     return true;
'   }
' 
'   void process(GDocument *doc, bool undo) const 
'   {
'     if (undo)
'       doc->insert(y, x, str);
'     else
'       doc->remove(y, x, y2, x2);
'     
'     info.process(doc);
'   }
' };
' 
' class GInsertCommand: public GDeleteCommand
' {
' public:
'   GInsertCommand(GCommandDocument *info, int y, int x, int y2, int x2, const GString &str): 
'     GDeleteCommand(info, y, x, y2, x2, str) {}
'   Type type() const { return Insert; }
'   void print() const { qDebug("Insert: (%d %d)-(%d %d): '%s'", x, y, x2, y2, TO_UTF8(str.getString())); info.print(); }
' 
'   bool merge(GCommand *c) const
'   {
'     if (c->type() != type())
'       return false;
' 
'     if (str.length() && str.isNewLine(0))
'       return false;
' 
'     GInsertCommand *o = (GInsertCommand *)c;
' 
'     if (o->info.view != info.view)
'       return false;
'     
'     if (o->str.length() && o->str.isNewLine(str.length() - 1))
'       return false;
' 
'     if (x != o->x2 || y != o->y2)
'       return false;
' 
'     o->str += str;
'     o->x2 = x2;
'     o->y2 = y2;
'     return true;
'   }
' 
'   void process(GDocument *doc, bool undo) const
'   {
'     GDeleteCommand::process(doc, !undo);
'   }
' };
'