Method EditWndProc

src/windows/MessageEditor.cpp:555–636

}

LRESULT MessageEditor::EditWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	MessageEditor* pThis = (MessageEditor*) GetWindowLongPtr(GetParent(hWnd), GWLP_USERDATA);
	assert(pThis);

	switch (uMsg)
	{
		case WM_DESTROY:
		{
			SetWindowLongPtr(hWnd, GWLP_WNDPROC,  (LONG_PTR) m_editWndProc);
			pThis->m_edit_hwnd = NULL;
			break;
		}
		case WM_KEYUP:
		case WM_KEYDOWN:
		{
			if (pThis->m_autoComplete.HandleKeyMessage(uMsg, wParam, lParam))
				return 0;

			if (wParam == VK_SHIFT)
				m_shiftHeld = uMsg == WM_KEYDOWN;

			break;
		}
		case WM_UPDATETEXTSIZE:
		{
			RECT rect{};
			GetClientRect(g_Hwnd, &rect);
			int maxHeight = (rect.bottom - rect.top) / 3;

			// Now check for expansion.
			// TODO: Figure out why I had to lower the line height by 1 pixel to make the cursor not deviate 1px up
			int lineCount = Edit_GetLineCount(hWnd);
			int expandByTarget = (lineCount - 1) * (pThis->m_lineHeight - 1);
			if (pThis->m_bReplying)
				expandByTarget += pThis->m_mentionAreaHeight;
			if (pThis->m_bEditing)
				expandByTarget += pThis->m_mentionAreaHeight;
			expandByTarget = std::min(expandByTarget, maxHeight);
			
			if (pThis->m_bBrowsingPast)
				expandByTarget += pThis->m_jumpPresentHeight;

			pThis->Expand(expandByTarget - pThis->m_expandedBy);
			break;
		}
		case WM_PASTE:
		case WM_CUT:
		case WM_COPY:
		case WM_SETTEXT:
		{
			LRESULT lres = CallWindowProc(m_editWndProc, hWnd, uMsg, wParam, lParam);
			pThis->OnUpdateText();
			return lres;
		}
		case WM_CHAR:
		{
			if (pThis->m_autoComplete.HandleCharMessage(uMsg, wParam, lParam))