RichEdit editor statistics proposal

RichEd_EditorStatistics.h

#define EM_GETEDITORSTATISTICS (WM_USER + ?) // LPARAM=EDITORSTATISTICS*. Returns ESM_* successfully retrieved

#define ESM_IPPOS     0x01 // IP row/col
#define ESM_LINECOUNT 0x02 // LineCount & EndNL
#define ESM_CHARCOUNT 0x04
#define ESM_SELLEN    0x08
#define ESM_STATE     0x10
#define ESM_LANGUAGE  0x20

#define ESS_OVERSTRIKE 0x01 // Insert/overstrike mode
#define ESS_READONLY   0x02
#define ESS_CANUNDO    0x04
#define ESS_CANREDO    0x08
#define ESS_WORDWRAP   0x10
#define ESS_MODIFIED   0x20

typedef struct {
  DWORD Mask;      // ESM_*
  LONG IPRow;
  LONG IPCol;
  DWORD LineCount; // Line count, not including word wrapped lines!
  DWORD CharCount; // Count of characters from all lines, excluding CR/LF.
  BYTE EndNL;      // Does the last line end with CR/LF?
  BYTE Reserved[3];
  DWORD SelLen;
  DWORD State;     // ESS_*
  LCID Language;   // Language @ IP
} EDITORSTATISTICS;

/* Example:

EDITORSTATISTICS es = { ESM_LINECOUNT|ESM_CHARCOUNT|ESM_SELLEN };
LRESULT ret = SendMessage(hEdit, EM_GETEDITORSTATISTICS, 0, (LPARAM) &es);
if (!ret) return Error(...);

DWORD nllen = g_crlf ? 2 : 1;
DWORD totcount = es.CharCount + ((es.LineCount - !es.EndNL) * nllen);

SetStatusbarInt(hStatus, PANEL_SELLEN, es.SelLen);
SetStatusbarInt(hStatus, PANEL_CHARCOUNT, totcount);

*/

// Implementation:

DWORD CTxtEdit::GetEditorStatistics(EDITORSTATISTICS*pES)
{
  DWORD retVal = 0, lineCount, endNL;
  
  if (pES->Mask & ESM_IPPOS)
  {
    pES->IPCol = m_ippos_x, pES->IPRow = m_ippos_y;
    retVal |= ESM_IPPOS;
  }
  
  if (pES->Mask & (ESM_LINECOUNT|ESM_CHARCOUNT))
  {
    lineCount = GetLineCount();
    endNL = ?;
  }
  
  if (pES->Mask & ESM_LINECOUNT)
  {
    pES->LineCount = lineCount;
    pES->EndNL = endNL;
    retVal |= ESM_LINECOUNT;
  }
  
  if (pES->Mask & ESM_CHARCOUNT)
  {
    DWORD txtLen = GetTextLength(); // Assumes CR and not CR/LF
    pES->CharCount = txtLen - (lineCount - !endNL);
    retVal |= ESM_CHARCOUNT;
  }
  
  if (pES->Mask & ESM_SELLEN)
  {
    CHARRANGE cr;
    GetSelectionRange(&cr);
    pES->SelLen = cr.cpMax - cr.cpMin;
    retVal |= ESM_SELLEN;
  }
  
  if (pES->Mask & ESM_STATE)
  {
    pES->State = 0
    | (m_Overstrike ? ESS_OVERSTRIKE : 0)
    | (m_ReadOnly ? ESS_READONLY : 0)
    | (CanUndo() ? ESS_CANUNDO : 0)
    | (CanRedo() ? ESS_CANREDO : 0)
    | (m_WordWrap ? ESS_WORDWRAP : 0)
    | (GetModified() ? ESS_MODIFIED : 0);
    retVal |= ESM_STATE;
  }
  
  if (pES->Mask & ESM_LANGUAGE)
  {
    pES->Language = GetCurrentLCID();
    retVal |= ESM_LANGUAGE;
  }
  
  return retVal;
}

...

case EM_GETEDITORSTATISTICS:
  lResult = GetEditorStatistics((EDITORSTATISTICS*) lParam);
  break;