112 lines
4.5 KiB
C++
112 lines
4.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the plugins of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qwindowsinternalmimedata.h"
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#include "qwindowscontext.h"
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#include "qwindowsmime.h"
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#include <QtCore/qdebug.h>
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#include <QtCore/qvariant.h>
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/*!
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\class QWindowsInternalMimeDataBase
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\brief Base for implementations of QInternalMimeData using a IDataObject COM object.
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In clipboard handling and Drag and drop, static instances
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of QInternalMimeData implementations are kept and passed to the client.
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QInternalMimeData provides virtuals that query the formats and retrieve
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mime data on demand when the client invokes functions like QMimeData::hasHtml(),
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QMimeData::html() on the instance returned. Otherwise, expensive
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construction of a new QMimeData object containing all possible
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formats would have to be done in each call to mimeData().
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The base class introduces new virtuals to obtain and release
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the instances IDataObject from the clipboard or Drag and Drop and
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does conversion using QWindowsMime classes.
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\sa QInternalMimeData, QWindowsMime, QWindowsMimeConverter
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\internal
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*/
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bool QWindowsInternalMimeData::hasFormat_sys(const QString &mime) const
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{
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IDataObject *pDataObj = retrieveDataObject();
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if (!pDataObj)
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return false;
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const QWindowsMimeConverter &mc = QWindowsContext::instance()->mimeConverter();
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const bool has = mc.converterToMime(mime, pDataObj) != nullptr;
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releaseDataObject(pDataObj);
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qCDebug(lcQpaMime) << __FUNCTION__ << mime << has;
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return has;
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}
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QStringList QWindowsInternalMimeData::formats_sys() const
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{
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IDataObject *pDataObj = retrieveDataObject();
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if (!pDataObj)
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return QStringList();
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const QWindowsMimeConverter &mc = QWindowsContext::instance()->mimeConverter();
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const QStringList fmts = mc.allMimesForFormats(pDataObj);
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releaseDataObject(pDataObj);
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qCDebug(lcQpaMime) << __FUNCTION__ << fmts;
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return fmts;
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}
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QVariant QWindowsInternalMimeData::retrieveData_sys(const QString &mimeType,
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QVariant::Type type) const
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{
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IDataObject *pDataObj = retrieveDataObject();
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if (!pDataObj)
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return QVariant();
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QVariant result;
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const QWindowsMimeConverter &mc = QWindowsContext::instance()->mimeConverter();
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if (auto converter = mc.converterToMime(mimeType, pDataObj))
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result = converter->convertToMime(mimeType, pDataObj, type);
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releaseDataObject(pDataObj);
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if (QWindowsContext::verbose) {
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qCDebug(lcQpaMime) <<__FUNCTION__ << ' ' << mimeType << ' ' << type
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<< " returns " << result.type()
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<< (result.type() != QVariant::ByteArray ? result.toString() : QStringLiteral("<data>"));
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}
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return result;
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}
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