Function NetworkUndrawChatMessage

src/network/network_chat_gui.cpp:120–164

Hide the chatbox */

/** Hide the chatbox */
void NetworkUndrawChatMessage()
{
	/* Sometimes we also need to hide the cursor
	 *   This is because both textmessage and the cursor take a shot of the
	 *   screen before drawing.
	 *   Now the textmessage takes its shot and paints its data before the cursor
	 *   does, so in the shot of the cursor is the screen-data of the textmessage
	 *   included when the cursor hangs somewhere over the textmessage. To
	 *   avoid wrong repaints, we undraw the cursor in that case, and everything
	 *   looks nicely ;)
	 * (and now hope this story above makes sense to you ;))
	 */
	if (_cursor.visible &&
			_cursor.draw_pos.x + _cursor.draw_size.x >= _chatmsg_box.x &&
			_cursor.draw_pos.x <= _chatmsg_box.x + _chatmsg_box.width &&
			_cursor.draw_pos.y + _cursor.draw_size.y >= _screen.height - _chatmsg_box.y - _chatmsg_box.height &&
			_cursor.draw_pos.y <= _screen.height - _chatmsg_box.y) {
		UndrawMouseCursor();
	}

	if (_chatmessage_visible) {
		Blitter *blitter = BlitterFactory::GetCurrentBlitter();
		int x      = _chatmsg_box.x;
		int y      = _screen.height - _chatmsg_box.y - _chatmsg_box.height;
		int width  = _chatmsg_box.width;
		int height = _chatmsg_box.height;
		if (y < 0) {
			height = std::max(height + y, std::min(_chatmsg_box.height, _screen.height));
			y = 0;
		}
		if (x + width >= _screen.width) {
			width = _screen.width - x;
		}
		if (width <= 0 || height <= 0) return;

		_chatmessage_visible = false;
		/* Put our 'shot' back to the screen */
		blitter->CopyFromBuffer(blitter->MoveTo(_screen.dst_ptr, x, y), _chatmessage_backup.GetBuffer(), width, height);
		/* And make sure it is updated next time */
		VideoDriver::GetInstance()->MakeDirty(x, y, width, height);

		_chatmessage_dirty_time = std::chrono::steady_clock::now();
		_chatmessage_dirty = true;
	}
}

/** Check if a message is expired on a regular interval. */
static const IntervalTimer<TimerWindow> network_message_expired_interval(std::chrono::seconds(1), [](auto) {