C++ popState函数代码示例

bool KHTMLReader::parse_ul(DOM::Element e)
{
    _list_depth++;
    bool popstateneeded = false;
    for (DOM::Node items = e.firstChild();!items.isNull();items = items.nextSibling()) {
        if (items.nodeName().string().toLower() == "li") {
            if (popstateneeded) {
                popState();
                //popstateneeded = false;
            }
            pushNewState();
            startNewLayout();
            popstateneeded = true;
            _writer->layoutAttribute(state()->paragraph, "COUNTER", "numberingtype", "1");
            _writer->layoutAttribute(state()->paragraph, "COUNTER", "righttext", ".");
            if (e.tagName().string().toLower() == "ol") {
                _writer->layoutAttribute(state()->paragraph, "COUNTER", "type", "1");
                _writer->layoutAttribute(state()->paragraph, "COUNTER", "numberingtype", "1");
                _writer->layoutAttribute(state()->paragraph, "COUNTER", "righttext", ".");
            } else {
                _writer->layoutAttribute(state()->paragraph, "COUNTER", "type", "10");
                _writer->layoutAttribute(state()->paragraph, "COUNTER", "numberingtype", "");
                _writer->layoutAttribute(state()->paragraph, "COUNTER", "righttext", "");
            }
            _writer->layoutAttribute(state()->paragraph, "COUNTER", "depth", QString("%1").arg(_list_depth - 1));
        }
        parseNode(items);
    }
    if (popstateneeded)
        popState();
    _list_depth--;
    return false;
}

void RTF::Reader::insertUnicodeSymbol(qint32 value)
{
	m_cursor.insertText(QChar(value));

	for (int i = m_state.skip; i > 0;) {
		m_token.readNext();

		if (m_token.type() == TextToken) {
			int len = m_token.text().count();
			if (len > i) {
				m_cursor.insertText(m_codec->toUnicode(m_token.text().mid(i)));
				break;
			} else {
				i -= len;
			}
		} else if (m_token.type() == ControlWordToken) {
			--i;
		} else if (m_token.type() == StartGroupToken) {
			pushState();
			break;
		} else if (m_token.type() == EndGroupToken) {
			popState();
			break;
		}
	}
}

void Game::executeStackChanges()
{
	// Parameters expected in mStackAction and mStackParam.
	switch (rStackAction) {
	case SAID::POP:
	{
		popState();
		break;
	}
	case SAID::PUSH:
	{
		pushState(rStackParam);
		break;
	}
	case SAID::SWAP:
	{
		swapState(rStackParam);
		break;
	}
	case SAID::RETURN_TO:
	{
		returnToState(rStackParam);
		break;
	}
	case SAID::CLEAR:
	{
		clearStateStack();
		break;
	}
	default: break;
	}

	// Finally, reset stack action requests:
	rStackAction = SAID::NOTHING;
}

void StateManager::changeState(State *state) {
	// pop the current state
	popState();

	// push the new state
	pushState(state);
}

void Game::changeState(GameState* state) {
    if(!this->states.empty())
        popState();
    pushState(state);

    return;
}

Game::~Game()
{
	while (!states.empty())
	{
		popState();
	}
}

void App::changeState(AppState* state) {
    if(!this->states.empty())
        popState();
    pushState(state);
    
    return;
}

void StateMachine::popStateOrRevert()
{
	if(!popState())
	{
		pushState(previousState);
	}
}

void CursorDropdown::onStateDeactivate(StateEvent* event)
{
    if (!_deactivated)
    {
        auto game = Game::getInstance();
        auto mouse = game->mouse();
        // workaround to get rid of cursor disappearing issues
        std::vector<unsigned int> icons;
        while (mouse->states()->size() > _initialMouseStack)
        {
            icons.push_back(mouse->state());
            mouse->popState();
        }
        if (icons.size() > 0)
        {
            icons.pop_back(); // remove empty icon from CursorDropdown state
            // place only new icons back in stack
            for (auto it = icons.rbegin(); it != icons.rend(); it++)
            {
                mouse->pushState(*it);
            }
        }
        mouse->setX(_initialX);
        mouse->setY(_initialY);
        _deactivated = true;
    }
}

GameManager::~GameManager()
{
	while (!gameState.empty())
	{
		popState();	//Delete happens in pop.
	}
}

void KHTMLReader::parseNode(DOM::Node node)
{

    // check if this is a text node.
    DOM::Text t = node;
    if (!t.isNull()) {
        _writer->addText(state()->paragraph, t.data().string(), 1, state()->in_pre_mode);
        return; // no children anymore...
    }

    // is this really needed ? it can't do harm anyway.
    state()->format = _writer->currentFormat(state()->paragraph, true);
    state()->layout = _writer->currentLayout(state()->paragraph);
    pushNewState();

    DOM::Element e = node;

    bool go_recursive = true;

    if (!e.isNull()) {
        // get the CSS information
        parseStyle(e);
        // get the tag information
        go_recursive = parseTag(e);
    }
    if (go_recursive) {
        for (DOM::Node q = node.firstChild(); !q.isNull(); q = q.nextSibling()) {
            parseNode(q);
        }
    }
    popState();


}

void
NextLevelState::keyPressed
(const OIS::KeyEvent &e) {
  // Tecla p --> Estado anterior.
  if (e.key == OIS::KC_P or e.key == OIS::KC_ESCAPE) {
    popState();
  }
}

/*****************************************************************************************************************************************************************
*   changeState() removes the top state, and completely replaces it
*   param1  :   a state to push to the end of the state stack
**************************************************************************************************************************************************************/
void StateHandler::changeState(const statePtr& state)
{
    while( !mStates.empty( ) ) {
        popState();
    }

    mStates.emplace( state );
}

void GameManager::changeState(GameState* state)
{
	if (!gameState.empty())
	{
		popState();
	}
	pushState(state);
}

void Game::changeState(GameState* state)
{
	if (!states.empty())
	{
		popState();
	}
	pushState(state);
}