textctrl.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        msw/textctrl.cpp
// Purpose:     wxTextCtrl
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id: textctrl.cpp,v 1.248.2.6 2006/01/19 15:37:55 JG Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "textctrl.h"
#endif

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_TEXTCTRL && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))

#ifndef WX_PRECOMP
    #include "wx/textctrl.h"
    #include "wx/settings.h"
    #include "wx/brush.h"
    #include "wx/utils.h"
    #include "wx/intl.h"
    #include "wx/log.h"
    #include "wx/app.h"
    #include "wx/menu.h"
    #include "wx/math.h"
#endif

#include "wx/module.h"

#if wxUSE_CLIPBOARD
    #include "wx/clipbrd.h"
#endif

#include "wx/textfile.h"

#include <windowsx.h>

#include "wx/msw/private.h"
#include "wx/msw/winundef.h"

#include <string.h>
#include <stdlib.h>

#ifndef __WXWINCE__
#include <sys/types.h>
#endif

#if wxUSE_RICHEDIT

// old mingw32 has richedit stuff directly in windows.h and doesn't have
// richedit.h at all
#if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
    #include <richedit.h>
#endif

#include "wx/msw/missing.h"

#endif // wxUSE_RICHEDIT

// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------

#if wxUSE_RICHEDIT

// this module initializes RichEdit DLL(s) if needed
class wxRichEditModule : public wxModule
{
public:
    enum Version
    {
        Version_1,          // riched32.dll
        Version_2or3,       // both use riched20.dll
        Version_41,         // msftedit.dll (XP SP1 and Windows 2003)
        Version_Max
    };

    virtual bool OnInit();
    virtual void OnExit();

    // load the richedit DLL for the specified version of rich edit
    static bool Load(Version version);

private:
    // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
    static HINSTANCE ms_hRichEdit[Version_Max];

    DECLARE_DYNAMIC_CLASS(wxRichEditModule)
};

HINSTANCE wxRichEditModule::ms_hRichEdit[Version_Max] = { NULL, NULL, NULL };

IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)

#endif // wxUSE_RICHEDIT

// a small class used to set m_updatesCount to 0 (to filter duplicate events if
// necessary) and to reset it back to -1 afterwards
class UpdatesCountFilter
{
public:
    UpdatesCountFilter(int& count)
        : m_count(count)
    {
        wxASSERT_MSG( m_count == -1, _T("wrong initial m_updatesCount value") );

        m_count = 0;
    }

    ~UpdatesCountFilter()
    {
        m_count = -1;
    }

    // return true if an event has been received
    bool GotUpdate() const
    {
        return m_count == 1;
    }

private:
    int& m_count;

    DECLARE_NO_COPY_CLASS(UpdatesCountFilter)
};

// ----------------------------------------------------------------------------
// event tables and other macros
// ----------------------------------------------------------------------------

#if wxUSE_EXTENDED_RTTI
WX_DEFINE_FLAGS( wxTextCtrlStyle )

wxBEGIN_FLAGS( wxTextCtrlStyle )
    // new style border flags, we put them first to
    // use them for streaming out
    wxFLAGS_MEMBER(wxBORDER_SIMPLE)
    wxFLAGS_MEMBER(wxBORDER_SUNKEN)
    wxFLAGS_MEMBER(wxBORDER_DOUBLE)
    wxFLAGS_MEMBER(wxBORDER_RAISED)
    wxFLAGS_MEMBER(wxBORDER_STATIC)
    wxFLAGS_MEMBER(wxBORDER_NONE)

    // old style border flags
    wxFLAGS_MEMBER(wxSIMPLE_BORDER)
    wxFLAGS_MEMBER(wxSUNKEN_BORDER)
    wxFLAGS_MEMBER(wxDOUBLE_BORDER)
    wxFLAGS_MEMBER(wxRAISED_BORDER)
    wxFLAGS_MEMBER(wxSTATIC_BORDER)
    wxFLAGS_MEMBER(wxBORDER)

    // standard window styles
    wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
    wxFLAGS_MEMBER(wxCLIP_CHILDREN)
    wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
    wxFLAGS_MEMBER(wxWANTS_CHARS)
    wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
    wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
    wxFLAGS_MEMBER(wxVSCROLL)
    wxFLAGS_MEMBER(wxHSCROLL)

    wxFLAGS_MEMBER(wxTE_PROCESS_ENTER)
    wxFLAGS_MEMBER(wxTE_PROCESS_TAB)
    wxFLAGS_MEMBER(wxTE_MULTILINE)
    wxFLAGS_MEMBER(wxTE_PASSWORD)
    wxFLAGS_MEMBER(wxTE_READONLY)
    wxFLAGS_MEMBER(wxHSCROLL)
    wxFLAGS_MEMBER(wxTE_RICH)
    wxFLAGS_MEMBER(wxTE_RICH2)
    wxFLAGS_MEMBER(wxTE_AUTO_URL)
    wxFLAGS_MEMBER(wxTE_NOHIDESEL)
    wxFLAGS_MEMBER(wxTE_LEFT)
    wxFLAGS_MEMBER(wxTE_CENTRE)
    wxFLAGS_MEMBER(wxTE_RIGHT)
    wxFLAGS_MEMBER(wxTE_DONTWRAP)
    wxFLAGS_MEMBER(wxTE_LINEWRAP)
    wxFLAGS_MEMBER(wxTE_WORDWRAP)

wxEND_FLAGS( wxTextCtrlStyle )

IMPLEMENT_DYNAMIC_CLASS_XTI(wxTextCtrl, wxControl,"wx/textctrl.h")

wxBEGIN_PROPERTIES_TABLE(wxTextCtrl)
    wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
    wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )

    wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
    wxPROPERTY( Value , wxString , SetValue, GetValue, wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY_FLAGS( WindowStyle , wxTextCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
wxEND_PROPERTIES_TABLE()

wxBEGIN_HANDLERS_TABLE(wxTextCtrl)
wxEND_HANDLERS_TABLE()

wxCONSTRUCTOR_6( wxTextCtrl , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size , long , WindowStyle)
#else
IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
#endif


BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
    EVT_CHAR(wxTextCtrl::OnChar)
    EVT_DROP_FILES(wxTextCtrl::OnDropFiles)

#if wxUSE_RICHEDIT
    EVT_CONTEXT_MENU(wxTextCtrl::OnContextMenu)
#endif

    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_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
    EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)

    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)
    EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
    EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)

    EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
END_EVENT_TABLE()

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// creation
// ----------------------------------------------------------------------------

void wxTextCtrl::Init()
{
#if wxUSE_RICHEDIT
    m_verRichEdit = 0;
#endif // wxUSE_RICHEDIT

    m_privateContextMenu = NULL;
    m_updatesCount = -1;
    m_isNativeCaretShown = true;
}

wxTextCtrl::~wxTextCtrl()
{
    delete m_privateContextMenu;
}

bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
                        const wxString& value,
                        const wxPoint& pos,
                        const wxSize& size,
                        long style,
                        const wxValidator& validator,
                        const wxString& name)
{
#ifdef __WXWINCE__
    if ((style & wxBORDER_MASK) == 0)
        style |= wxBORDER_SIMPLE;
#endif

    // base initialization
    if ( !CreateControl(parent, id, pos, size, style, validator, name) )
        return false;

    // translate wxWin style flags to MSW ones
    WXDWORD msStyle = MSWGetCreateWindowFlags();

    // do create the control - either an EDIT or RICHEDIT
    wxString windowClass = wxT("EDIT");

#if defined(__POCKETPC__) || defined(__SMARTPHONE__)
    // A control that capitalizes the first letter
    if (style & wxTE_CAPITALIZE)
        windowClass = wxT("CAPEDIT");
#endif

#if wxUSE_RICHEDIT
    if ( m_windowStyle & wxTE_AUTO_URL )
    {
        // automatic URL detection only works in RichEdit 2.0+
        m_windowStyle |= wxTE_RICH2;
    }

    if ( m_windowStyle & wxTE_RICH2 )
    {
        // using richedit 2.0 implies using wxTE_RICH
        m_windowStyle |= wxTE_RICH;
    }

    // we need to load the richedit DLL before creating the rich edit control
    if ( m_windowStyle & wxTE_RICH )
    {
        // versions 2.0, 3.0 and 4.1 of rich edit are mostly compatible with
        // each other but not with version 1.0, so we have separate flags for
        // the version 1.0 and the others (and so m_verRichEdit may be 0 (plain
        // EDIT control), 1 for version 1.0 or 2 for any higher version)
        //
        // notice that 1.0 has no Unicode support at all so in Unicode build we
        // must use another version

#if wxUSE_UNICODE
        m_verRichEdit = 2;
#else // !wxUSE_UNICODE
        m_verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
#endif // wxUSE_UNICODE/!wxUSE_UNICODE

        if ( m_verRichEdit == 2 )
        {
            if ( wxRichEditModule::Load(wxRichEditModule::Version_41) )
            {
                // yes, class name for version 4.1 really is 5.0
                windowClass = _T("RICHEDIT50W");
            }
            else if ( wxRichEditModule::Load(wxRichEditModule::Version_2or3) )
            {
                windowClass = _T("RichEdit20")
#if wxUSE_UNICODE
                              _T("W");
#else // ANSI
                              _T("A");
#endif // Unicode/ANSI
            }
            else // failed to load msftedit.dll and riched20.dll
            {
                m_verRichEdit = 1;
            }
        }

        if ( m_verRichEdit == 1 )
        {
            if ( wxRichEditModule::Load(wxRichEditModule::Version_1) )
            {
                windowClass = _T("RICHEDIT");
            }
            else // failed to load any richedit control DLL
            {
                // only give the error msg once if the DLL can't be loaded
                static bool s_errorGiven = false; // MT ok as only used by GUI

                if ( !s_errorGiven )
                {
                    wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));

                    s_errorGiven = true;
                }

                m_verRichEdit = 0;
            }
        }
    }
#endif // wxUSE_RICHEDIT

    // we need to turn '\n's into "\r\n"s for the multiline controls
    wxString valueWin;
    if ( m_windowStyle & wxTE_MULTILINE )
    {
        valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
    }
    else // single line
    {
        valueWin = value;
    }

    if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
        return false;

#if wxUSE_RICHEDIT
    if ( IsRich() )
    {
        // enable the events we're interested in: we want to get EN_CHANGE as
        // for the normal controls
        LPARAM mask = ENM_CHANGE;

        if ( GetRichVersion() == 1 )
        {
            // we also need EN_MSGFILTER for richedit 1.0 for the reasons
            // explained in its handler
           mask |= ENM_MOUSEEVENTS;

           // we also need to force the appearance of the vertical scrollbar
           // initially as otherwise the control doesn't refresh correctly
           // after resize: but once the vertical scrollbar had been shown
           // (even if it's subsequently hidden) it does
           //
           // this is clearly a bug and for now it has been only noticed under
           // Windows XP, so if we're sure it works correctly under other
           // systems we could do this only for XP
           SetSize(-1, 1); // 1 is small enough to force vert scrollbar
           SetSize(size);
        }
        else if ( m_windowStyle & wxTE_AUTO_URL )
        {
            mask |= ENM_LINK;

            ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
        }

        ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
    }
#endif // wxUSE_RICHEDIT

    return true;
}

// Make sure the window style (etc.) reflects the HWND style (roughly)
void wxTextCtrl::AdoptAttributesFromHWND()
{
    wxWindow::AdoptAttributesFromHWND();

    HWND hWnd = GetHwnd();
    long style = ::GetWindowLong(hWnd, GWL_STYLE);

    // retrieve the style to see whether this is an edit or richedit ctrl