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dynamic compression support

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This commit is contained in:
Max-Wilhelm Bruker 2011-06-25 15:58:38 +02:00
parent cc795a2dd7
commit d892d320ea
9 changed files with 85 additions and 13 deletions
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49
common/serializable_item.cpp
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@ -1,7 +1,8 @@
#include "serializable_item.h"
#include <QXmlStreamReader>
#include <QXmlStreamWriter>
#include <QDebug>
#include <QBuffer>
QHash<QString, SerializableItem::NewItemFunction> SerializableItem::itemNameHash;
SerializableItem *SerializableItem::getNewItem(const QString &name)
@ -16,6 +17,32 @@ void SerializableItem::registerSerializableItem(const QString &name, NewItemFunc
itemNameHash.insert(name, func);
}
bool SerializableItem::read(QXmlStreamReader *xml)
{
if (!compressed)
return readElement(xml);
if (xml->isEndElement() && (xml->name() == itemType)) {
QByteArray uncompressedData = "<d>" + qUncompress(QByteArray::fromBase64(compressedData)) + "</d>";
compressedData.clear();
QBuffer compressedBuffer(&uncompressedData);
compressedBuffer.open(QIODevice::ReadOnly);
QXmlStreamReader *xml2 = new QXmlStreamReader(&compressedBuffer);
while (!xml2->atEnd()) {
xml2->readNext();
if (xml2->name() == "d")
continue;
readElement(xml2);
}
delete xml2;
compressedBuffer.close();
return readElement(xml);
} else {
compressedData.append(xml->text().toString());
return false;
}
}
bool SerializableItem::readElement(QXmlStreamReader *xml)
{
if (xml->isEndElement() && (xml->name() == itemType))
@ -31,7 +58,19 @@ void SerializableItem::write(QXmlStreamWriter *xml)
xml->writeStartElement(itemType);
if (!itemSubType.isEmpty())
xml->writeAttribute("type", itemSubType);
writeElement(xml);
if (compressed) {
xml->writeAttribute("comp", "1");
QBuffer compressBuffer;
compressBuffer.open(QIODevice::WriteOnly);
QXmlStreamWriter *xml2 = new QXmlStreamWriter(&compressBuffer);
writeElement(xml2);
delete xml2;
compressBuffer.close();
xml->writeCharacters(qCompress(compressBuffer.data()).toBase64());
} else
writeElement(xml);
xml->writeEndElement();
}
@ -47,7 +86,7 @@ SerializableItem_Map::~SerializableItem_Map()
bool SerializableItem_Map::readElement(QXmlStreamReader *xml)
{
if (currentItem) {
if (currentItem->readElement(xml))
if (currentItem->read(xml))
currentItem = 0;
return false;
} else if (firstItem)
@ -57,6 +96,7 @@ bool SerializableItem_Map::readElement(QXmlStreamReader *xml)
else if (xml->isStartElement()) {
QString childName = xml->name().toString();
QString childSubType = xml->attributes().value("type").toString();
bool childCompressed = xml->attributes().value("comp").toString().toInt() == 1;
currentItem = itemMap.value(childName);
if (!currentItem) {
currentItem = getNewItem(childName + childSubType);
@ -64,7 +104,8 @@ bool SerializableItem_Map::readElement(QXmlStreamReader *xml)
if (!currentItem)
currentItem = new SerializableItem_Invalid(childName);
}
if (currentItem->readElement(xml))
currentItem->setCompressed(childCompressed);
if (currentItem->read(xml))
currentItem = 0;
}
return SerializableItem::readElement(xml);