don't crash in UnselectAll() if the tree has no root

[wxWidgets.git] / src / mac / carbon / textctrl.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        textctrl.cpp
// Purpose:     wxTextCtrl
// Author:      AUTHOR
// Modified by:
// Created:     ??/??/98
// RCS-ID:      $Id$
// Copyright:   (c) AUTHOR
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "textctrl.h"
#endif

#include "wx/defs.h"

#if wxUSE_TEXTCTRL

#ifdef __DARWIN__
  #include <sys/types.h>
  #include <sys/stat.h>
#else
  #include <stat.h>
#endif
#include <fstream.h>

#include "wx/app.h"
#include "wx/dc.h"
#include "wx/button.h"
#include "wx/toplevel.h"
#include "wx/textctrl.h"
#include "wx/notebook.h"
#include "wx/tabctrl.h"
#include "wx/settings.h"
#include "wx/filefn.h"
#include "wx/utils.h"

#if defined(__BORLANDC__) && !defined(__WIN32__)
  #include <alloc.h>
#elif !defined(__MWERKS__) && !defined(__GNUWIN32) && !defined(__DARWIN__)
  #include <malloc.h>
#endif

#include "wx/mac/uma.h"

#define wxUSE_MLTE 0

#if wxUSE_MLTE == 0 // old textctrl implementation

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)

BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
    EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
    EVT_CHAR(wxTextCtrl::OnChar)
    EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
    EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
    EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
    EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
    EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)

    EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
    EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
    EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
    EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
    EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
END_EVENT_TABLE()
#endif

// Text item
wxTextCtrl::wxTextCtrl()
{
}

const short kVerticalMargin = 2 ;
const short kHorizontalMargin = 2 ;

bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
           const wxString& st,
           const wxPoint& pos,
           const wxSize& size, long style,
           const wxValidator& validator,
           const wxString& name)
{
    // base initialization
    if ( !CreateBase(parent, id, pos, size, style, validator, name) )
        return FALSE;

    wxSize mySize = size ;
    if ( UMAHasAppearance() )
    {
        m_macHorizontalBorder = 5 ; // additional pixels around the real control
        m_macVerticalBorder = 5 ;
    }
    else
    {
        m_macHorizontalBorder = 0 ; // additional pixels around the real control
        m_macVerticalBorder = 0 ;
    }


    Rect bounds ;
    Str255 title ;

    if ( mySize.y == -1 )
    {
        if ( UMAHasAppearance() )
            mySize.y = 13 ;
        else
            mySize.y = 24 ;
        
        mySize.y += 2 * m_macVerticalBorder ;
    }

    MacPreControlCreate( parent , id ,  "" , pos , mySize ,style, validator , name , &bounds , title ) ;

    if ( m_windowStyle & wxTE_MULTILINE )
    {
        wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
                      wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );

        m_windowStyle |= wxTE_PROCESS_ENTER;
    }


    m_macControl = ::NewControl( parent->MacGetRootWindow() , &bounds , "\p" , true , 0 , 0 , 1, 
        ( style & wxTE_PASSWORD ) ? kControlEditTextPasswordProc : kControlEditTextProc , (long) this ) ;
    MacPostControlCreate() ;

    wxString value ;
    
    {
        TEHandle teH ;
        long size ;
   
        ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
        (*teH)->lineHeight = -1 ;
    }
    
    if( wxApp::s_macDefaultEncodingIsPC )
        value = wxMacMakeMacStringFromPC( st ) ;
    else
        value = st ;
    ::SetControlData( m_macControl, 0, ( m_windowStyle & wxTE_PASSWORD ) ? kControlEditTextPasswordTag : kControlEditTextTextTag , value.Length() , (char*) ((const char*)value) ) ;

  return TRUE;
}

wxString wxTextCtrl::GetValue() const
{
    Size actualsize;
    ::GetControlData( m_macControl, 0, ( m_windowStyle & wxTE_PASSWORD ) ? kControlEditTextPasswordTag : kControlEditTextTextTag , 32767 , wxBuffer , &actualsize) ;
    wxBuffer[actualsize] = 0 ;
    if( wxApp::s_macDefaultEncodingIsPC )
        return wxMacMakePCStringFromMac( wxBuffer ) ;
    else
        return wxString(wxBuffer);
}

void wxTextCtrl::GetSelection(long* from, long* to) const
{
   ControlEditTextSelectionRec selection ;
   TEHandle teH ;
   long size ;
   
   ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;

    *from = (**teH).selStart;
    *to = (**teH).selEnd;
}

void wxTextCtrl::SetValue(const wxString& st)
{
    wxString value ;
    
    if( wxApp::s_macDefaultEncodingIsPC )
        value = wxMacMakeMacStringFromPC( st ) ;
    else
        value = st ;
    ::SetControlData( m_macControl, 0, ( m_windowStyle & wxTE_PASSWORD ) ? kControlEditTextPasswordTag : kControlEditTextTextTag , value.Length() , (char*) ((const char*)value) ) ;
    MacRedrawControl() ;
}

// Clipboard operations
void wxTextCtrl::Copy()
{
    if (CanCopy())
    {
        TEHandle teH ;
        long size ;
   
  		  ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
		    TECopy( teH ) ;
        ClearCurrentScrap();
		    TEToScrap() ;
    }
}

void wxTextCtrl::Cut()
{
    if (CanCut())
    {
        TEHandle teH ;
        long size ;
   
   		  ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
		    TECut( teH ) ;
        ClearCurrentScrap();
		    TEToScrap() ;
		    //	MacInvalidateControl() ;
	  }
}

void wxTextCtrl::Paste()
{
    if (CanPaste())
    {
        TEHandle teH ;
        long size ;
   
        ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
        TEFromScrap() ;
        TEPaste( teH ) ;
        MacRedrawControl() ;
    }
}

bool wxTextCtrl::CanCopy() const
{
    // Can copy if there's a selection
    long from, to;
    GetSelection(& from, & to);
    return (from != to);
}

bool wxTextCtrl::CanCut() const
{
    // Can cut if there's a selection
    long from, to;
    GetSelection(& from, & to);
    return (from != to);
}

bool wxTextCtrl::CanPaste() const
{
    if (!IsEditable())
        return FALSE;

    long offset ;
#if TARGET_CARBON
    OSStatus err = noErr;
    ScrapRef scrapRef;
    
    err = GetCurrentScrap( &scrapRef );
    if ( err != noTypeErr && err != memFullErr )    
    {
        ScrapFlavorFlags    flavorFlags;
        Size                byteCount;
        
        if (( err = GetScrapFlavorFlags( scrapRef, 'TEXT', &flavorFlags )) == noErr)
        {
            if (( err = GetScrapFlavorSize( scrapRef, 'TEXT', &byteCount )) == noErr)
            {
                return TRUE ;
            }
        }
    }
    return FALSE;
    
#else
    if ( GetScrap( NULL , 'TEXT' , &offset ) > 0 )
    {
        return TRUE ;
    }
#endif
    return FALSE ;
}

void wxTextCtrl::SetEditable(bool editable)
{
    if ( editable )
        UMAActivateControl( m_macControl ) ;
    else
        UMADeactivateControl( m_macControl ) ;
}

void wxTextCtrl::SetInsertionPoint(long pos)
{
    SetSelection( pos , pos ) ;
}

void wxTextCtrl::SetInsertionPointEnd()
{
    long pos = GetLastPosition();
    SetInsertionPoint(pos);
}

long wxTextCtrl::GetInsertionPoint() const
{
   ControlEditTextSelectionRec selection ;
   TEHandle teH ;
   long size ;
   
   ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
//   ::GetControlData( m_macControl , 0, kControlEditTextSelectionTag , sizeof( selection ) , (char*) &selection , &size ) ;
    return (**teH).selStart ;
}

long wxTextCtrl::GetLastPosition() const
{
   ControlEditTextSelectionRec selection ;
   TEHandle teH ;
   long size ;
   
   ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
   
//   ::GetControlData( m_macControl , 0, kControlEditTextSelectionTag , sizeof( selection ) , (char*) &selection , &size ) ;
    return (**teH).teLength ;
}

void wxTextCtrl::Replace(long from, long to, const wxString& value)
{
    TEHandle teH ;
    long size ;
   
    ControlEditTextSelectionRec selection ;
   
    selection.selStart = from ;
    selection.selEnd = to ;
    ::SetControlData( m_macControl , 0, kControlEditTextSelectionTag , sizeof( selection ) , (char*) &selection ) ;
        ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
    TESetSelect( from , to  , teH ) ;
    TEDelete( teH ) ;
        TEInsert( value , value.Length() , teH ) ;
    Refresh() ;
}

void wxTextCtrl::Remove(long from, long to)
{
    TEHandle teH ;
    long size ;
   
    ControlEditTextSelectionRec selection ;
   
    selection.selStart = from ;
    selection.selEnd = to ;
    ::SetControlData( m_macControl , 0, kControlEditTextSelectionTag , sizeof( selection ) , (char*) &selection ) ;
    ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
    TEDelete( teH ) ;
    Refresh() ;
}

void wxTextCtrl::SetSelection(long from, long to)
{
   ControlEditTextSelectionRec selection ;
   TEHandle teH ;
   long size ;
   
   ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
   
   selection.selStart = from ;
   selection.selEnd = to ;
   
   ::SetControlData( m_macControl , 0, kControlEditTextSelectionTag , sizeof( selection ) , (char*) &selection ) ;
   TESetSelect( selection.selStart , selection.selEnd , teH ) ;
}

bool wxTextCtrl::LoadFile(const wxString& file)
{
    if ( wxTextCtrlBase::LoadFile(file) )
    {
        return TRUE;
    }

    return FALSE;
}

void wxTextCtrl::WriteText(const wxString& text)
{
    TEHandle teH ;
    long size ;
   
    memcpy( wxBuffer, text , text.Length() ) ;
    wxBuffer[text.Length() ] = 0 ;
//    wxMacConvertNewlines( wxBuffer , wxBuffer ) ;
   
    ::GetControlData( m_macControl , 0, kControlEditTextTEHandleTag , sizeof( TEHandle ) , (char*) &teH , &size ) ;
   
        TEInsert( wxBuffer , strlen( wxBuffer) , teH ) ;
        Refresh() ;
}

void wxTextCtrl::AppendText(const wxString& text)
{
    SetInsertionPointEnd();
    WriteText(text);
}

void wxTextCtrl::Clear()
{
    ::SetControlData( m_macControl, 0, ( m_windowStyle & wxTE_PASSWORD ) ? kControlEditTextPasswordTag : kControlEditTextTextTag , 0 , (char*) ((const char*)NULL) ) ;
    Refresh() ;
}

bool wxTextCtrl::IsModified() const
{
    return TRUE;
}

bool wxTextCtrl::IsEditable() const
{
    return IsEnabled();
}

bool wxTextCtrl::AcceptsFocus() const
{
    // we don't want focus if we can't be edited
    return IsEditable() && wxControl::AcceptsFocus();
}

wxSize wxTextCtrl::DoGetBestSize() const
{
    int wText = 100 ;
    
    int hText ;
        if ( UMAHasAppearance() )
            hText = 13 ;
        else
            hText = 24 ;
    hText += 2 * m_macHorizontalBorder ;
/*
    int cx, cy;
    wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());

    int wText = DEFAULT_ITEM_WIDTH;

    int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);

    return wxSize(wText, hText);
*/
    if ( m_windowStyle & wxTE_MULTILINE )
    {
        hText *= wxMin(GetNumberOfLines(), 5);
    }
    //else: for single line control everything is ok
    return wxSize(wText, hText);
}

// ----------------------------------------------------------------------------
// Undo/redo
// ----------------------------------------------------------------------------

void wxTextCtrl::Undo()
{
    if (CanUndo())
    {
    }
}

void wxTextCtrl::Redo()
{
    if (CanRedo())
    {
    }
}

bool wxTextCtrl::CanUndo() const
{
    return FALSE ;
}

bool wxTextCtrl::CanRedo() const
{
    return FALSE ;
}

// Makes 'unmodified'
void wxTextCtrl::DiscardEdits()
{
    // TODO
}

int wxTextCtrl::GetNumberOfLines() const
{
    Size actualsize;
    ::GetControlData( m_macControl, 0, ( m_windowStyle & wxTE_PASSWORD ) ? kControlEditTextPasswordTag : kControlEditTextTextTag , 32767 , wxBuffer , &actualsize) ;
    
    int count = 1;
    for (int i = 0; i < actualsize; i++)
    {
        if (wxBuffer[i] == '\r') count++;
    }
    
    return count;
}

long wxTextCtrl::XYToPosition(long x, long y) const
{
    // TODO
    return 0;
}

bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
{
    return FALSE ;
}

void wxTextCtrl::ShowPosition(long pos)
{
    // TODO
}

int wxTextCtrl::GetLineLength(long lineNo) const
{
    Size actualsize;
    ::GetControlData( m_macControl, 0, ( m_windowStyle & wxTE_PASSWORD ) ? kControlEditTextPasswordTag : kControlEditTextTextTag , 32767 , wxBuffer , &actualsize) ;
    
    // Find line first
    int count = 0;
    for (int i = 0; i < actualsize; i++)
    {
        if (count == lineNo)
        {
            // Count chars in line then
            count = 0;
            for (int j = i; j < actualsize; j++)
            {
                count++;
                if (wxBuffer[j] == '\r') return count;
            }
            
            return count;
        }
        if (wxBuffer[i] == '\r') count++;
    }
    
    return 0;
}

wxString wxTextCtrl::GetLineText(long lineNo) const
{
    Size actualsize;
    ::GetControlData( m_macControl, 0, ( m_windowStyle & wxTE_PASSWORD ) ? kControlEditTextPasswordTag : kControlEditTextTextTag , 32767 , wxBuffer , &actualsize) ;
    
    // Find line first
    int count = 0;
    for (int i = 0; i < actualsize; i++)
    {
        if (count == lineNo)
        {
            // Add chars in line then
            wxString tmp("");
            
            for (int j = i; j < actualsize; j++)
            {
                if (wxBuffer[j] == '\r')
                    return tmp;
                    
                tmp += wxBuffer[j];
            }
            
            return tmp;
        }
        if (wxBuffer[i] == '\r') count++;
    }
    
    return wxString("");
}

/*
 * Text item
 */
 
void wxTextCtrl::Command(wxCommandEvent & event)
{
    SetValue (event.GetString());
    ProcessCommand (event);
}

void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
{
    // By default, load the first file into the text window.
    if (event.GetNumberOfFiles() > 0)
    {
        LoadFile(event.GetFiles()[0]);
    }
}

void wxTextCtrl::OnChar(wxKeyEvent& key_event)
{
    bool eat_key = FALSE;

    switch ( key_event.KeyCode() )
    {
        case WXK_RETURN:
            if (m_windowStyle & wxPROCESS_ENTER)
            {
                wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
                event.SetEventObject( this );
                event.SetString( GetValue() );
                if ( GetEventHandler()->ProcessEvent(event) )
                    return;
            } 
            if ( !(m_windowStyle & wxTE_MULTILINE) )
            {
                wxWindow *parent = GetParent();
                while( parent && !parent->IsTopLevel() && parent->GetDefaultItem() == NULL ) {
                  parent = parent->GetParent() ;
                }
                if ( parent && parent->GetDefaultItem() )
                {
                    wxButton *def = wxDynamicCast(parent->GetDefaultItem(),
                                                          wxButton);
                    if ( def && def->IsEnabled() )
                    {
                        wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, def->GetId() );
                        event.SetEventObject(def);
                        def->Command(event);
                        return ;
                   }
                }
               
                // this will make wxWindows eat the ENTER key so that
                // we actually prevent line wrapping in a single line
                // text control
                eat_key = TRUE;
            }

            break;

        case WXK_TAB:
            // always produce navigation event - even if we process TAB
            // ourselves the fact that we got here means that the user code
            // decided to skip processing of this TAB - probably to let it
            // do its default job.
            {
                wxNavigationKeyEvent eventNav;
                eventNav.SetDirection(!key_event.ShiftDown());
                eventNav.SetWindowChange(key_event.ControlDown());
                eventNav.SetEventObject(this);

                if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
                    return;

                key_event.Skip() ;
                return;
            }
            break;
    }
    
    EventRecord *ev = wxTheApp->MacGetCurrentEvent();
    short keychar = short(ev->message & charCodeMask);
    if (!eat_key)
    {
        short keycode = short(ev->message & keyCodeMask) >> 8 ;
        ::HandleControlKey( m_macControl , keycode , keychar , ev->modifiers );
    }
    if ( keychar >= 0x20 ||
         key_event.KeyCode() == WXK_RETURN ||
         key_event.KeyCode() == WXK_DELETE || 
         key_event.KeyCode() == WXK_BACK)
    {
        wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
        event.SetString( GetValue() ) ;
        event.SetEventObject( this );
        GetEventHandler()->ProcessEvent(event);
    }
}

// ----------------------------------------------------------------------------
// standard handlers for standard edit menu events
// ----------------------------------------------------------------------------

void wxTextCtrl::OnCut(wxCommandEvent& event)
{
    Cut();
}

void wxTextCtrl::OnCopy(wxCommandEvent& event)
{
    Copy();
}

void wxTextCtrl::OnPaste(wxCommandEvent& event)
{
    Paste();
}

void wxTextCtrl::OnUndo(wxCommandEvent& event)
{
    Undo();
}

void wxTextCtrl::OnRedo(wxCommandEvent& event)
{
    Redo();
}

void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
{
    event.Enable( CanCut() );
}

void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
{
    event.Enable( CanCopy() );
}

void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
{
    event.Enable( CanPaste() );
}

void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
{
    event.Enable( CanUndo() );
}

void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
{
    event.Enable( CanRedo() );
}

#else

extern wxApp *wxTheApp ;
// CS:We will replace the TextEdit by using the MultiLanguageTextEngine based on the following code written by apple

/*
    File: mUPControl.c
    
    Description:
        mUPControl implementation.

    Copyright: