/*
* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, version 2.1 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not,
* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".
*
* Description:
*
*/
#include "ViewportMetaDataParser.h"
namespace GVA {
ViewportMetaDataParser::ViewportMetaDataParser(const QRect& clientRect)
: m_clientRect(clientRect)
{}
ViewportMetaDataParser::~ViewportMetaDataParser()
{}
void ViewportMetaDataParser::parse(const QString& viewportParams, ViewportMetaData& viewportMetaData)
{
processArguments(viewportParams, viewportMetaData);
//viewportMetaData.adjustViewportData(m_clientRect);
return;
}
//W A R N I N G
//FOLLOWING CODE HAS BEEN TAKEN FROM WebCore/dom/Document.cpp
//NEED TO REMOVE WHEN QtWebkit provides viewport param API
// Though isspace() considers \t and \v to be whitespace, Win IE doesn't.
bool ViewportMetaDataParser::isSeparator(QChar c)
{
return c == ' '
|| c == '\t'
|| c == '\n'
|| c == '\r'
|| c == '='
|| c == ','
|| c == '\0'
|| c == ';';
}
void ViewportMetaDataParser::processArguments(const QString& features, ViewportMetaData& viewportMetaData)
{
int keyBegin, keyEnd;
int valueBegin, valueEnd;
int i = 0;
int length = features.length();
QString buffer = features.toLower();
while (i < length) {
// skip to first non-separator, but don't skip past the end of the string
while (isSeparator(buffer[i])) {
if (i >= length)
break;
i++;
}
keyBegin = i;
// skip to first separator
while (!isSeparator(buffer[i]))
i++;
keyEnd = i;
// skip to first '=', but don't skip past a ',' or the end of the string
while (buffer[i] != '=') {
if (buffer[i] == ',' || i >= length)
break;
i++;
}
// skip to first non-separator, but don't skip past a ',' or the end of the string
while (isSeparator(buffer[i])) {
if (buffer[i] == ',' || i >= length)
break;
i++;
}
valueBegin = i;
// skip to first separator
while (!isSeparator(buffer[i]))
i++;
valueEnd = i;
Q_ASSERT(i <= length);
QString keyString = buffer.mid(keyBegin, keyEnd - keyBegin);
QString valueString = buffer.mid(valueBegin, valueEnd - valueBegin);
setViewportFeature(keyString, valueString, viewportMetaData);
}
#ifdef VIEWPORT_ALWAYS_ALLOW_ZOOMING
// Hacks to always allow zooming. !!!
if(viewportMetaData.m_minimumScale == viewportMetaData.m_maximumScale) {
viewportMetaData.m_minimumScale = 0.2;
viewportMetaData.m_maximumScale = 5.0;
viewportMetaData.m_userScalable = true;
viewportMetaData.m_userScalableOverRidden = true;
}
#endif
return;
}
void ViewportMetaDataParser::setViewportFeature(const QString& keyString, const QString& valueString, ViewportMetaData& viewportMetaData)
{
float value = ViewportMetaData::ValueUndefined;
if (QString::compare(valueString, "device-width", Qt::CaseInsensitive) == 0)
value = m_clientRect.width();
else if (QString::compare(valueString, "device-height", Qt::CaseInsensitive) == 0)
value = m_clientRect.height();
else if (QString::compare(valueString, "default", Qt::CaseInsensitive) == 0) {
// This allows us to distinguish the omission of a key from asking for the default value.
value = -2;
}
else if (valueString.length()) {
// listing a key with no value is shorthand for key=default
value = valueString.toDouble();
}
if (keyString == "initial-scale") {
viewportMetaData.m_initialScale = value;
viewportMetaData.setFlag(ViewportMetaData::UserDefinedInitialScale,true);
}
else if (keyString == "minimum-scale") {
viewportMetaData.m_minimumScale = value;
viewportMetaData.m_specifiedData.m_minScale = value;
viewportMetaData.setFlag(ViewportMetaData::UserDefinedMinumumScale,true);
}
else if (keyString == "maximum-scale") {
viewportMetaData.m_maximumScale = value;
viewportMetaData.setFlag(ViewportMetaData::UserDefinedMaximumScale,true);
}
else if (keyString == "user-scalable") {
if (QString::compare(valueString, "yes", Qt::CaseInsensitive) == 0)
viewportMetaData.m_userScalable = true;
else {
#ifdef VIEWPORT_ALWAYS_ALLOW_ZOOMING
viewportMetaData.m_userScalable = true;
viewportMetaData.m_userScalableOverRidden = true;
#else
viewportMetaData.m_userScalable = false;
#endif
}
}
else if (keyString == "width") {
viewportMetaData.m_width = value;
viewportMetaData.m_specifiedData.m_width = valueString;
}
else if (keyString == "height") {
viewportMetaData.m_height = value;
viewportMetaData.m_specifiedData.m_height = valueString;
}
}
} //namespace GVA