don't use strcpy to copy between overlapping strings, it's undefined operation

[wxWidgets.git] / src / msw / textctrl.cpp

diff --git a/src/msw/textctrl.cpp b/src/msw/textctrl.cpp
index 3b0c9572ea3628c19f2f77459f1c8c02555f7708..f7c7cb3adae6e4f7143397ba7d28f71b7294449b 100644 (file)
--- a/src/msw/textctrl.cpp
+++ b/src/msw/textctrl.cpp
@@ -199,9 +199,6 @@ BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)

-#ifdef __WIN16__
-    EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
-#endif

 
     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 END_EVENT_TABLE()
 
     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 END_EVENT_TABLE()


@@ -637,6 +634,9 @@ void wxTextCtrl::SetValue(const wxString& value)
     if ( (value.length() > 0x400) || (value != GetValue()) )
     {
         DoWriteText(value, FALSE /* not selection only */);
     if ( (value.length() > 0x400) || (value != GetValue()) )
     {
         DoWriteText(value, FALSE /* not selection only */);

+        
+        // for compatibility, don't move the cursor when doing SetValue()
+        SetInsertionPoint(0);

     }
     else // same text
     {
     }
     else // same text
     {


@@ -649,9 +649,6 @@ void wxTextCtrl::SetValue(const wxString& value)
     // mark the control as being not dirty - we changed its text, not the
     // user
     DiscardEdits();
     // mark the control as being not dirty - we changed its text, not the
     // user
     DiscardEdits();

-
-    // for compatibility, don't move the cursor when doing SetValue()
-    SetInsertionPoint(0);

 }
 
 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 }
 
 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)


@@ -688,7 +685,7 @@ struct wxStreamOutData
 };
 
 DWORD CALLBACK
 };
 
 DWORD CALLBACK

-wxRichEditStreamOut(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
+wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)

 {
     *pcb = 0;
 
 {
     *pcb = 0;
 


@@ -822,13 +819,13 @@ wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
         // decreased by wxRichEditStreamOut
         *(wchBuf.data() + data.len) = L'\0';
 
         // decreased by wxRichEditStreamOut
         *(wchBuf.data() + data.len) = L'\0';
 

-        // now convert to the given encoding (this is a lossful conversion but
-        // what else can we do)
+        // now convert to the given encoding (this is a possibly lossful
+        // conversion but what else can we do)

         wxCSConv conv(encoding);
         wxCSConv conv(encoding);

-        size_t lenNeeded = conv.WC2MB(NULL, wchBuf, len);
-        if ( lenNeeded )
+        size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
+        if ( lenNeeded++ )

         {
         {

-            conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, len);
+            conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);

         }
     }
 
         }
     }
 


@@ -1194,7 +1191,6 @@ void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 {
     HWND hWnd = GetHwnd();
 
 {
     HWND hWnd = GetHwnd();
 

-#ifdef __WIN32__

 #if wxUSE_RICHEDIT
     if ( IsRich() )
     {
 #if wxUSE_RICHEDIT
     if ( IsRich() )
     {


@@ -1250,10 +1246,23 @@ void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
         }
 #endif // wxUSE_RICHEDIT
     }
         }
 #endif // wxUSE_RICHEDIT
     }

-#else // Win16
-    // WPARAM is 0: selection is scrolled into view
-    SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
-#endif // Win32/16
+}
+
+// ----------------------------------------------------------------------------
+// Working with files
+// ----------------------------------------------------------------------------
+
+bool wxTextCtrl::LoadFile(const wxString& file)
+{
+    if ( wxTextCtrlBase::LoadFile(file) )
+    {
+        // update the size limit if needed
+        AdjustSpaceLimit();
+
+        return TRUE;
+    }
+
+    return FALSE;

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -1273,19 +1282,6 @@ void wxTextCtrl::Remove(long from, long to)
     Replace(from, to, wxEmptyString);
 }
 
     Replace(from, to, wxEmptyString);
 }
 

-bool wxTextCtrl::LoadFile(const wxString& file)
-{
-    if ( wxTextCtrlBase::LoadFile(file) )
-    {
-        // update the size limit if needed
-        AdjustSpaceLimit();
-
-        return TRUE;
-    }
-
-    return FALSE;
-}
-

 bool wxTextCtrl::IsModified() const
 {
     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
 bool wxTextCtrl::IsModified() const
 {
     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;


@@ -1306,6 +1302,10 @@ int wxTextCtrl::GetNumberOfLines() const
     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 }
 
     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 }
 

+// ----------------------------------------------------------------------------
+// Positions <-> coords
+// ----------------------------------------------------------------------------
+

 long wxTextCtrl::XYToPosition(long x, long y) const
 {
     // This gets the char index for the _beginning_ of this line
 long wxTextCtrl::XYToPosition(long x, long y) const
 {
     // This gets the char index for the _beginning_ of this line


@@ -1353,6 +1353,99 @@ bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
     return TRUE;
 }
 
     return TRUE;
 }
 

+wxTextCtrlHitTestResult
+wxTextCtrl::HitTest(const wxPoint& pt, wxTextCoord *col, wxTextCoord *row) const
+{
+    // first get the position from Windows
+    LPARAM lParam;
+
+#if wxUSE_RICHEDIT
+    POINTL ptl;
+    if ( IsRich() )
+    {
+        // for rich edit controls the position is passed iva the struct fields
+        ptl.x = pt.x;
+        ptl.y = pt.y;
+        lParam = (LPARAM)&ptl;
+    }
+    else
+#endif // wxUSE_RICHEDIT
+    {
+        // for the plain ones, we are limited to 16 bit positions which are
+        // combined in a single 32 bit value
+        lParam = MAKELPARAM(pt.x, pt.y);
+    }
+
+    LRESULT pos = SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
+
+    if ( pos == -1 )
+    {
+        // this seems to indicate an error...
+        return wxTE_HT_UNKNOWN;
+    }
+
+#if wxUSE_RICHEDIT
+    if ( !IsRich() )
+#endif // wxUSE_RICHEDIT
+    {
+        // for plain EDIT controls the higher word contains something else
+        pos = LOWORD(pos);
+    }
+
+
+    // next determine where it is relatively to our point: EM_CHARFROMPOS
+    // always returns the closest character but we need to be more precise, so
+    // double check that we really are where it pretends
+    POINTL ptReal;
+
+#if wxUSE_RICHEDIT
+    // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
+    //        we don't know how to do it
+    if ( IsRich() )
+    {
+        SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
+    }
+    else
+#endif // wxUSE_RICHEDIT
+    {
+        LRESULT lRc = SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
+
+        if ( lRc == -1 )
+        {
+            // this is apparently returned when pos corresponds to the last
+            // position
+            ptReal.x =
+            ptReal.y = 0;
+        }
+        else
+        {
+            ptReal.x = LOWORD(lRc);
+            ptReal.y = HIWORD(lRc);
+        }
+    }
+
+    wxTextCtrlHitTestResult rc;
+
+    if ( pt.y > ptReal.y + GetCharHeight() )
+        rc = wxTE_HT_BELOW;
+    else if ( pt.x > ptReal.x + GetCharWidth() )
+        rc = wxTE_HT_BEYOND;
+    else
+        rc = wxTE_HT_ON_TEXT;
+
+    // finally translate to column/row
+    if ( !PositionToXY(pos, col, row) )
+    {
+        wxFAIL_MSG( _T("PositionToXY() not expected to fail in HitTest()") );
+    }
+
+    return rc;
+}
+
+// ----------------------------------------------------------------------------
+// 
+// ----------------------------------------------------------------------------
+

 void wxTextCtrl::ShowPosition(long pos)
 {
     HWND hWnd = GetHwnd();
 void wxTextCtrl::ShowPosition(long pos)
 {
     HWND hWnd = GetHwnd();


@@ -1578,7 +1671,7 @@ void wxTextCtrl::OnChar(wxKeyEvent& event)
     switch ( event.GetKeyCode() )
     {
         case WXK_RETURN:
     switch ( event.GetKeyCode() )
     {
         case WXK_RETURN:

-            if ( !(m_windowStyle & wxTE_MULTILINE) )
+            if ( !HasFlag(wxTE_MULTILINE) )

             {
                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
                 InitCommandEvent(event);
             {
                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
                 InitCommandEvent(event);


@@ -1591,10 +1684,26 @@ void wxTextCtrl::OnChar(wxKeyEvent& event)
             break;
 
         case WXK_TAB:
             break;
 
         case WXK_TAB:

-            // always produce navigation event - even if we process TAB
+            // always produce navigation event -- even if we process TAB

             // ourselves the fact that we got here means that the user code
             // ourselves the fact that we got here means that the user code

-            // decided to skip processing of this TAB - probably to let it
+            // decided to skip processing of this TAB -- probably to let it

             // do its default job.
             // do its default job.

+
+            // ok, so this is getting absolutely ridiculous but I don't see
+            // any other way to fix this bug: when a multiline text control is
+            // inside a wxFrame, we need to generate the navigation event as
+            // otherwise nothing happens at all, but when the same control is
+            // created inside a dialog, IsDialogMessage() *does* switch focus
+            // all by itself and so if we do it here as well, it is advanced
+            // twice and goes to the next control... to prevent this from
+            // happening we're doing this ugly check, the logic being that if
+            // we don't have focus then it had been already changed to the next
+            // control
+            //
+            // the right thing to do would, of course, be to understand what
+            // the hell is IsDialogMessage() doing but this is beyond my feeble
+            // forces at the moment unfortunately
+            if ( FindFocus() == this )

             {
                 wxNavigationKeyEvent eventNav;
                 eventNav.SetDirection(!event.ShiftDown());
             {
                 wxNavigationKeyEvent eventNav;
                 eventNav.SetDirection(!event.ShiftDown());


@@ -1611,9 +1720,9 @@ void wxTextCtrl::OnChar(wxKeyEvent& event)
     event.Skip();
 }
 
     event.Skip();
 }
 

-long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
+WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)

 {
 {

-    long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
+    WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);

 
     if ( nMsg == WM_GETDLGCODE )
     {
 
     if ( nMsg == WM_GETDLGCODE )
     {


@@ -1750,40 +1859,8 @@ WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSE
     return (WXHBRUSH)brush->GetResourceHandle();
 }
 
     return (WXHBRUSH)brush->GetResourceHandle();
 }
 

-// In WIN16, need to override normal erasing because
-// Ctl3D doesn't use the wxWindows background colour.
-#ifdef __WIN16__
-void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
-{
-    wxColour col(m_backgroundColour);
-
-#if wxUSE_CTL3D
-    if (m_useCtl3D)
-        col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
-#endif
-
-    RECT rect;
-    ::GetClientRect(GetHwnd(), &rect);
-
-    COLORREF ref = wxColourToRGB(col);
-    HBRUSH hBrush = ::CreateSolidBrush(ref);
-    if ( !hBrush )
-        wxLogLastError(wxT("CreateSolidBrush"));
-
-    HDC hdc = (HDC)event.GetDC()->GetHDC();
-
-    int mode = ::SetMapMode(hdc, MM_TEXT);
-
-    ::FillRect(hdc, &rect, hBrush);
-    ::DeleteObject(hBrush);
-    ::SetMapMode(hdc, mode);
-
-}
-#endif // Win16
-

 bool wxTextCtrl::AdjustSpaceLimit()
 {
 bool wxTextCtrl::AdjustSpaceLimit()
 {

-#ifndef __WIN16__

     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
 
     // HACK: we try to automatically extend the limit for the amount of text
     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
 
     // HACK: we try to automatically extend the limit for the amount of text


@@ -1825,7 +1902,6 @@ bool wxTextCtrl::AdjustSpaceLimit()
             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
         }
     }
             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
         }
     }

-#endif // !Win16

 
     // we changed the limit
     return TRUE;
 
     // we changed the limit
     return TRUE;


@@ -1846,13 +1922,17 @@ wxSize wxTextCtrl::DoGetBestSize() const
 
     int wText = DEFAULT_ITEM_WIDTH;
 
 
     int wText = DEFAULT_ITEM_WIDTH;
 

-    int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
+    int hText = cy;

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

+    // we have to add the adjustments for the control height only once, not
+    // once per line, so do it after multiplication above
+    hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
+

     return wxSize(wText, hText);
 }
 
     return wxSize(wText, hText);
 }