TowerDefense/plistreader.cpp at master · ArthurinRUC/TowerDefense · GitHub

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#include "plistreader.h"
#include <QIODevice>
#include <QVariant>
#include <QMap>

PListReader::PListReader()
{
}

bool PListReader::read(QIODevice *device)
{
	m_xmlReader.setDevice(device);

	if (m_xmlReader.readNextStartElement())
	{
		if (m_xmlReader.name() == "plist" && m_xmlReader.attributes().value("version") == "1.0")
			readPList();
		else
			m_xmlReader.raiseError("The file is not an PList version 1.0 file.");
	}

	return m_xmlReader.error();
}

const QList<QVariant> PListReader::data() const
{
	return m_data;
}

QString PListReader::errorString() const
{
	return QString("%1\nLine %2, column %3")
			.arg(m_xmlReader.errorString())
			.arg(m_xmlReader.lineNumber())
			.arg(m_xmlReader.columnNumber());
}

void PListReader::readPList()
{
	Q_ASSERT(m_xmlReader.isStartElement() && m_xmlReader.name() == "plist");

	while (m_xmlReader.readNextStartElement())
	{
		if (m_xmlReader.name() == "array")
			readArray(m_data);
		else if (m_xmlReader.name() == "dict")
			readDict(m_data);
		else
			m_xmlReader.skipCurrentElement();
	}
}

void PListReader::readArray(QList<QVariant> &array)
{
	Q_ASSERT(m_xmlReader.isStartElement() && m_xmlReader.name() == "array");

	while (m_xmlReader.readNextStartElement())
	{
		if (m_xmlReader.name() == "array")
		{
			QList<QVariant> subArray;
			readArray(subArray);
			array.push_back(subArray);
		}
		else if (m_xmlReader.name() == "dict")
		{
			readDict(array);
		}
		else
		{
			m_xmlReader.skipCurrentElement();
		}
	}
}

void PListReader::readDict(QList<QVariant> &array)
{
	Q_ASSERT(m_xmlReader.isStartElement() && m_xmlReader.name() == "dict");

	QMap<QString, QVariant> dict;
	while (m_xmlReader.readNextStartElement())
	{
		// 这里只处理key,在readKey中,一次默认读取一对键值
		if (m_xmlReader.name() == "key")
			readKey(dict);
		else
			m_xmlReader.skipCurrentElement();
	}

	array.push_back(dict);
}

void PListReader::readKey(QMap<QString, QVariant> &dict)
{
	Q_ASSERT(m_xmlReader.isStartElement() && m_xmlReader.name() == "key");

	// 这里一次读取一个键值对
	QString key = m_xmlReader.readElementText();
	Q_ASSERT(m_xmlReader.readNextStartElement());
	QString value = m_xmlReader.readElementText();

	dict.insertMulti(key, value);
}