/////////////////////////////////////////////////////////////////////////////
// Name:        wx/univ/textctrl.h
// Purpose:     wxTextCtrl class
// Author:      Vadim Zeitlin
// Modified by:
// Created:     15.09.00
// RCS-ID:      $Id$
// Copyright:   (c) 2000 Vadim Zeitlin
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_UNIV_TEXTCTRL_H_
#define _WX_UNIV_TEXTCTRL_H_

#ifdef __GNUG__
    #pragma interface "univtextctrl.h"
#endif

class WXDLLEXPORT wxCaret;

#include "wx/scrolwin.h"    // for wxScrollHelper

// ----------------------------------------------------------------------------
// wxTextCtrl actions
// ----------------------------------------------------------------------------

// cursor movement and also selection and delete operations
#define wxACTION_TEXT_HOME          _T("home")
#define wxACTION_TEXT_END           _T("end")
#define wxACTION_TEXT_LEFT          _T("left")
#define wxACTION_TEXT_RIGHT         _T("right")
#define wxACTION_TEXT_UP            _T("up")
#define wxACTION_TEXT_DOWN          _T("down")
#define wxACTION_TEXT_WORD_LEFT     _T("wordleft")
#define wxACTION_TEXT_WORD_RIGHT    _T("wordright")
#define wxACTION_TEXT_PAGE_UP       _T("pageup")
#define wxACTION_TEXT_PAGE_DOWN     _T("pagedown")

// clipboard operations
#define wxACTION_TEXT_COPY          _T("copy")
#define wxACTION_TEXT_CUT           _T("cut")
#define wxACTION_TEXT_PASTE         _T("paste")

// insert text at the cursor position: the text is in strArg of PerformAction
#define wxACTION_TEXT_INSERT        _T("insert")

// if the action starts with either of these prefixes and the rest of the
// string is one of the movement commands, it means to select/delete text from
// the current cursor position to the new one
#define wxACTION_TEXT_PREFIX_SEL    _T("sel")
#define wxACTION_TEXT_PREFIX_DEL    _T("del")

// mouse selection
#define wxACTION_TEXT_ANCHOR_SEL    _T("anchorsel")
#define wxACTION_TEXT_EXTEND_SEL    _T("extendsel")

// ----------------------------------------------------------------------------
// wxTextCtrl
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxTextCtrl : public wxTextCtrlBase, public wxScrollHelper
{
public:
    // creation
    // --------

    wxTextCtrl() { Init(); }

    wxTextCtrl(wxWindow *parent,
               wxWindowID id,
               const wxString& value = wxEmptyString,
               const wxPoint& pos = wxDefaultPosition,
               const wxSize& size = wxDefaultSize,
               long style = 0,
               const wxValidator& validator = wxDefaultValidator,
               const wxString& name = wxTextCtrlNameStr)
    {
        Init();

        Create(parent, id, value, pos, size, style, validator, name);
    }

    bool Create(wxWindow *parent,
                wxWindowID id,
                const wxString& value = wxEmptyString,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = 0,
                const wxValidator& validator = wxDefaultValidator,
                const wxString& name = wxTextCtrlNameStr);

    // implement base class pure virtuals
    // ----------------------------------

    virtual wxString GetValue() const;
    virtual void SetValue(const wxString& value);

    virtual int GetLineLength(long lineNo) const;
    virtual wxString GetLineText(long lineNo) const;
    virtual int GetNumberOfLines() const;

    virtual bool IsModified() const;
    virtual bool IsEditable() const;

    // If the return values from and to are the same, there is no selection.
    virtual void GetSelection(long* from, long* to) const;

    // operations
    // ----------

    // editing
    virtual void Clear();
    virtual void Replace(long from, long to, const wxString& value);
    virtual void Remove(long from, long to);

    // clears the dirty flag
    virtual void DiscardEdits();

    // writing text inserts it at the current position, appending always
    // inserts it at the end
    virtual void WriteText(const wxString& text);
    virtual void AppendText(const wxString& text);

    // translate between the position (which is just an index in the text ctrl
    // considering all its contents as a single strings) and (x, y) coordinates
    // which represent column and line.
    virtual long XYToPosition(long x, long y) const;
    virtual bool PositionToXY(long pos, long *x, long *y) const;

    virtual void ShowPosition(long pos);

    // Clipboard operations
    virtual void Copy();
    virtual void Cut();
    virtual void Paste();

    // Undo/redo
    virtual void Undo();
    virtual void Redo();

    virtual bool CanUndo() const;
    virtual bool CanRedo() const;

    // Insertion point
    virtual void SetInsertionPoint(long pos);
    virtual void SetInsertionPointEnd();
    virtual long GetInsertionPoint() const;
    virtual long GetLastPosition() const;

    virtual void SetSelection(long from, long to);
    virtual void SetEditable(bool editable);

    // wxUniv-specific methods
    // -----------------------

    // caret stuff
    virtual void ShowCaret(bool show = TRUE);
    void HideCaret() { ShowCaret(FALSE); }

    // helpers for cursor movement
    long GetWordStart() const;
    long GetWordEnd() const;

    // selection helpers
    bool HasSelection() const { return m_selStart != -1; }
    void ClearSelection();
    void RemoveSelection();

    // implementation only from now on
    // -------------------------------

    // set the right colours
    virtual bool IsContainerWindow() const { return TRUE; }
    virtual wxBorder GetDefaultBorder() const { return wxBORDER_SUNKEN; }

    // perform an action
    virtual bool PerformAction(const wxControlAction& action,
                               long numArg = -1,
                               const wxString& strArg = wxEmptyString);

protected:
    // draw the text
    virtual void DoDraw(wxControlRenderer *renderer);

    // calc the size from the text extent
    virtual wxSize DoGetBestClientSize() const;

    // input support
    virtual wxString GetInputHandlerType() const;

    // common part of all ctors
    void Init();

    // is this a single-line control?
    bool IsSingleLine() const { return !(GetWindowStyle() & wxTE_MULTILINE); }

    // event handlers
    void OnChar(wxKeyEvent& event);

private:
    // the value (may be only part of it for the multiline controls)
    wxString m_value;

    // current position
    long m_curPos,
         m_curLine,
         m_curRow;

    // selection
    long m_selAnchor,
         m_selStart,
         m_selEnd;

    // flags
    bool m_isModified:1,
         m_isEditable:1;

    DECLARE_EVENT_TABLE()
    DECLARE_DYNAMIC_CLASS(wxTextCtrl)
};

#endif // _WX_UNIV_TEXTCTRL_H_