Method AreaCursorUpdate

GUI/RichTextarea.cpp:1284–1337

// Reset is used so that cursor will always be visible after key or mouse events
int	ibarState = 0;
VOID CALLBACK RichTextarea::AreaCursorUpdate(HWND hwnd, UINT uMsg, UINT_PTR idEvent, DWORD dwTime)
{
	if(!hwnd || (GetFocus() != hwnd && ibarState != 0))
		return;

	TextareaData *data = GetData(hwnd);

	(void)dwTime;
	(void)uMsg;
	// Ticks go more frequently than I-bar cursor switches its state
	HPEN currPen = ibarState % 16 < 8 ? areaPenBlack1px : areaPenWhite1px;

	// Must be used so that painting could be done
	InvalidateRect(hwnd, NULL, false);
	HDC hdc = BeginPaint(hwnd, &areaPS);

	// Find cursor position in characters
	int	posInChars = 0;
	for(unsigned int i = 0; i < data->cursorCharX; i++)
		posInChars += GetCharShift(data->currLine->data[i].ch, posInChars);
	// Calculate cursor position in pixels
	int	xPos = padLeft - data->shiftCharX * charWidth + posInChars * charWidth;
	int chWidth = data->cursorCharX == data->currLine->length ? charWidth : GetCharShift(data->currLine->data[data->cursorCharX].ch, posInChars) * charWidth;

	// While selecting pen, we check if our window is active. Cursor shouldn't blink if focus is on some other window
	SelectPen(hdc, idEvent ? currPen : areaPenWhite1px);

	MoveToEx(hdc, xPos, (data->cursorCharY - data->shiftCharY) * charHeight, NULL);
	LineTo(hdc, xPos, (data->cursorCharY - data->shiftCharY) * charHeight + charHeight);

	if(insertionMode)
	{
		// Draw full box
		LineTo(hdc, xPos + chWidth, (data->cursorCharY - data->shiftCharY) * charHeight + charHeight);
		LineTo(hdc, xPos + chWidth, (data->cursorCharY - data->shiftCharY) * charHeight);
		LineTo(hdc, xPos, (data->cursorCharY - data->shiftCharY) * charHeight);
	}
	EndPaint(hwnd, &areaPS);

	if(areaStatus)
	{
		char buf[256];
		sprintf(buf, "Ln %d", data->cursorCharY + 1);
		SendMessage(areaStatus, (WM_USER+1), 1, (LPARAM)buf);
		sprintf(buf, "Col %d", posInChars + 1);
		SendMessage(areaStatus, (WM_USER+1), 2, (LPARAM)buf);
		sprintf(buf, "Ch %d", data->cursorCharX + 1);
		SendMessage(areaStatus, (WM_USER+1), 3, (LPARAM)buf);
		sprintf(buf, "%s", insertionMode ? "OVR" : "INS");
		SendMessage(areaStatus, (WM_USER+1), 4, (LPARAM)buf);
	}

	ibarState++;
}

// Function for single char insertion at the cursor position
void TextareaData::InputChar(char ch)