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qgsclipboard.cpp
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qgsclipboard.cpp
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/***************************************************************************
qgsclipboard.cpp - QGIS internal clipboard for storage of features
--------------------------------------------------------------------
begin : 20 May, 2005
copyright : (C) 2005 by Brendan Morley
email : morb at ozemail dot com dot au
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include <fstream>
#include <QApplication>
#include <QObject>
#include <QString>
#include <QStringList>
#include <QClipboard>
#include <QMimeData>
#include <QTextCodec>
#include "qgsclipboard.h"
#include "qgsfeature.h"
#include "qgsfeaturestore.h"
#include "qgsfields.h"
#include "qgsgeometry.h"
#include "qgscoordinatereferencesystem.h"
#include "qgslogger.h"
#include "qgsvectorlayer.h"
#include "qgsogrutils.h"
#include "qgsjsonutils.h"
#include "qgssettings.h"
#include "qgisapp.h"
#include "qgsmapcanvas.h"
#include "qgsproject.h"
#include "qgsapplication.h"
QgsClipboard::QgsClipboard()
{
connect( QApplication::clipboard(), &QClipboard::dataChanged, this, &QgsClipboard::systemClipboardChanged );
}
void QgsClipboard::replaceWithCopyOf( QgsVectorLayer *src )
{
if ( !src )
return;
// Replace the QGis clipboard.
mFeatureFields = src->fields();
mFeatureClipboard = src->selectedFeatures();
mCRS = src->crs();
mSrcLayer = src;
QgsDebugMsg( QStringLiteral( "replaced QGis clipboard." ) );
setSystemClipboard();
mUseSystemClipboard = false;
emit changed();
}
void QgsClipboard::replaceWithCopyOf( QgsFeatureStore &featureStore )
{
QgsDebugMsg( QStringLiteral( "features count = %1" ).arg( featureStore.features().size() ) );
mFeatureFields = featureStore.fields();
mFeatureClipboard = featureStore.features();
mCRS = featureStore.crs();
mSrcLayer = nullptr;
setSystemClipboard();
mUseSystemClipboard = false;
emit changed();
}
void QgsClipboard::generateClipboardText( QString &textContent, QString &htmlContent ) const
{
CopyFormat format = QgsSettings().enumValue( QStringLiteral( "qgis/copyFeatureFormat" ), AttributesWithWKT );
textContent.clear();
htmlContent.clear();
switch ( format )
{
case AttributesOnly:
case AttributesWithWKT:
{
QStringList textLines, htmlLines;
QStringList textFields, htmlFields;
// first do the field names
if ( format == AttributesWithWKT )
{
textFields += QStringLiteral( "wkt_geom" );
htmlFields += QStringLiteral( "<td>wkt_geom</td>" );
}
const auto constMFeatureFields = mFeatureFields;
for ( const QgsField &field : constMFeatureFields )
{
textFields += field.name();
htmlFields += QStringLiteral( "<td>%1</td>" ).arg( field.name() );
}
textLines += textFields.join( QStringLiteral( "\t" ) );
htmlLines += htmlFields.join( QString() );
textFields.clear();
htmlFields.clear();
// then the field contents
for ( QgsFeatureList::const_iterator it = mFeatureClipboard.constBegin(); it != mFeatureClipboard.constEnd(); ++it )
{
QgsAttributes attributes = it->attributes();
// TODO: Set up Paste Transformations to specify the order in which fields are added.
if ( format == AttributesWithWKT )
{
if ( it->hasGeometry() )
{
QString wkt = it->geometry().asWkt();
textFields += wkt;
htmlFields += QStringLiteral( "<td>%1</td>" ).arg( wkt );
}
else
{
textFields += QgsApplication::nullRepresentation();
htmlFields += QStringLiteral( "<td>%1</td>" ).arg( QgsApplication::nullRepresentation() );
}
}
for ( int idx = 0; idx < attributes.count(); ++idx )
{
QString value = attributes.at( idx ).toString();
if ( value.contains( '\n' ) || value.contains( '\t' ) )
textFields += '"' + value.replace( '"', QStringLiteral( "\"\"" ) ) + '\"';
else
{
textFields += value;
}
value = attributes.at( idx ).toString();
value.replace( '\n', QStringLiteral( "<br>" ) ).replace( '\t', QStringLiteral( " " ) );
htmlFields += QStringLiteral( "<td>%1</td>" ).arg( value );
}
textLines += textFields.join( QStringLiteral( "\t" ) );
htmlLines += htmlFields.join( QString() );
textFields.clear();
htmlFields.clear();
}
textContent = textLines.join( '\n' );
htmlContent = QStringLiteral( "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\"><html><head><meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\"/></head><body><table border=\"1\"><tr>" ) + htmlLines.join( QStringLiteral( "</tr><tr>" ) ) + QStringLiteral( "</tr></table></body></html>" );
break;
}
case GeoJSON:
{
QgsJsonExporter exporter;
exporter.setSourceCrs( mCRS );
textContent = exporter.exportFeatures( mFeatureClipboard );
}
}
}
void QgsClipboard::setSystemClipboard()
{
// avoid overwriting internal clipboard - note that on Windows, the call to QClipboard::setText
// below doesn't immediately trigger QClipboard::dataChanged, and accordingly the call to
// systemClipboardChanged() is delayed. So by setting mIgnoreNextSystemClipboardChange we indicate
// that just the next call to systemClipboardChanged() should be ignored
mIgnoreNextSystemClipboardChange = true;
QClipboard *cb = QApplication::clipboard();
// Copy text into the clipboard
QString textCopy, htmlCopy;
generateClipboardText( textCopy, htmlCopy );
QMimeData *m = new QMimeData();
m->setText( textCopy );
if ( mFeatureClipboard.count() < 1000 && !htmlCopy.isEmpty() )
{
m->setHtml( htmlCopy );
}
// With qgis running under Linux, but with a Windows based X
// server (Xwin32), ::Selection was necessary to get the data into
// the Windows clipboard (which seems contrary to the Qt
// docs). With a Linux X server, ::Clipboard was required.
// The simple solution was to put the text into both clipboards.
#ifdef Q_OS_LINUX
cb->setMimeData( m, QClipboard::Selection );
#endif
cb->setMimeData( m, QClipboard::Clipboard );
QgsDebugMsgLevel( QStringLiteral( "replaced system clipboard with: %1." ).arg( textCopy ), 4 );
}
QgsFeatureList QgsClipboard::stringToFeatureList( const QString &string, const QgsFields &fields ) const
{
//first try using OGR to read string
QgsFeatureList features = QgsOgrUtils::stringToFeatureList( string, fields, QTextCodec::codecForName( "System" ) );
if ( !features.isEmpty() )
return features;
// otherwise try to read in as WKT
QStringList values = string.split( '\n' );
if ( values.isEmpty() || string.isEmpty() )
return features;
QgsFields sourceFields = retrieveFields();
const auto constValues = values;
for ( const QString &row : constValues )
{
// Assume that it's just WKT for now. because GeoJSON is managed by
// previous QgsOgrUtils::stringToFeatureList call
// Get the first value of a \t separated list. WKT clipboard pasted
// feature has first element the WKT geom.
// This split is to fix the following issue: https://github.com/qgis/QGIS/issues/24769
// Value separators are set in generateClipboardText
QStringList fieldValues = row.split( '\t' );
if ( fieldValues.isEmpty() )
continue;
QgsFeature feature;
feature.setFields( sourceFields );
feature.initAttributes( fieldValues.size() - 1 );
//skip header line
if ( fieldValues.at( 0 ) == QLatin1String( "wkt_geom" ) )
{
continue;
}
for ( int i = 1; i < fieldValues.size(); ++i )
{
feature.setAttribute( i - 1, fieldValues.at( i ) );
}
QgsGeometry geometry = QgsGeometry::fromWkt( fieldValues[0] );
if ( !geometry.isNull() )
{
feature.setGeometry( geometry );
}
features.append( feature );
}
return features;
}
QgsFields QgsClipboard::retrieveFields() const
{
QClipboard *cb = QApplication::clipboard();
#ifdef Q_OS_LINUX
QString string = cb->text( QClipboard::Selection );
#else
QString string = cb->text( QClipboard::Clipboard );
#endif
QgsFields f = QgsOgrUtils::stringToFields( string, QTextCodec::codecForName( "System" ) );
if ( f.size() < 1 )
{
if ( string.isEmpty() )
{
return f;
}
//wkt?
QString firstLine = string.section( '\n', 0, 0 );
if ( !firstLine.isEmpty() )
{
QStringList fieldNames = firstLine.split( '\t' );
//wkt / text always has wkt_geom as first attribute (however values can be NULL)
if ( fieldNames.at( 0 ) != QLatin1String( "wkt_geom" ) )
{
return f;
}
for ( int i = 0; i < fieldNames.size(); ++i )
{
QString fieldName = fieldNames.at( i );
if ( fieldName == QLatin1String( "wkt_geom" ) )
{
continue;
}
f.append( QgsField( fieldName, QVariant::String ) );
}
}
}
return f;
}
QgsFeatureList QgsClipboard::copyOf( const QgsFields &fields ) const
{
QgsDebugMsg( QStringLiteral( "returning clipboard." ) );
if ( !mUseSystemClipboard )
return mFeatureClipboard;
QClipboard *cb = QApplication::clipboard();
#ifdef Q_OS_LINUX
QString text = cb->text( QClipboard::Selection );
#else
QString text = cb->text( QClipboard::Clipboard );
#endif
if ( text.endsWith( '\n' ) )
{
text.chop( 1 );
// In case Windows <EOL> marker (CRLF) makes it into the variable "text"
if ( text.endsWith( '\r' ) )
{
text.chop( 1 );
}
}
return stringToFeatureList( text, fields );
}
void QgsClipboard::clear()
{
mFeatureClipboard.clear();
QgsDebugMsg( QStringLiteral( "cleared clipboard." ) );
emit changed();
}
void QgsClipboard::insert( const QgsFeature &feature )
{
mFeatureClipboard.push_back( feature );
QgsDebugMsgLevel( "inserted " + feature.geometry().asWkt(), 4 );
mUseSystemClipboard = false;
emit changed();
}
bool QgsClipboard::isEmpty() const
{
QClipboard *cb = QApplication::clipboard();
#ifdef Q_OS_LINUX
QString text = cb->text( QClipboard::Selection );
#else
QString text = cb->text( QClipboard::Clipboard );
#endif
return text.isEmpty() && mFeatureClipboard.empty();
}
QgsFeatureList QgsClipboard::transformedCopyOf( const QgsCoordinateReferenceSystem &destCRS, const QgsFields &fields ) const
{
QgsFeatureList featureList = copyOf( fields );
QgisApp::instance()->askUserForDatumTransform( crs(), destCRS );
QgsCoordinateTransform ct = QgsCoordinateTransform( crs(), destCRS, QgsProject::instance() );
QgsDebugMsg( QStringLiteral( "transforming clipboard." ) );
for ( QgsFeatureList::iterator iter = featureList.begin(); iter != featureList.end(); ++iter )
{
QgsGeometry g = iter->geometry();
g.transform( ct );
iter->setGeometry( g );
}
return featureList;
}
QgsCoordinateReferenceSystem QgsClipboard::crs() const
{
return mCRS;
}
void QgsClipboard::setData( const QString &mimeType, const QByteArray &data, const QString &text )
{
mUseSystemClipboard = true;
QMimeData *mdata = new QMimeData();
mdata->setData( mimeType, data );
if ( !text.isEmpty() )
{
mdata->setText( text );
}
// Transfers ownership to the clipboard object
#ifdef Q_OS_LINUX
QApplication::clipboard()->setMimeData( mdata, QClipboard::Selection );
#endif
QApplication::clipboard()->setMimeData( mdata, QClipboard::Clipboard );
}
void QgsClipboard::setText( const QString &text )
{
#ifdef Q_OS_LINUX
QApplication::clipboard()->setText( text, QClipboard::Selection );
#endif
QApplication::clipboard()->setText( text, QClipboard::Clipboard );
}
bool QgsClipboard::hasFormat( const QString &mimeType ) const
{
return QApplication::clipboard()->mimeData()->hasFormat( mimeType );
}
QByteArray QgsClipboard::data( const QString &mimeType ) const
{
return QApplication::clipboard()->mimeData()->data( mimeType );
}
QgsFields QgsClipboard::fields() const
{
if ( !mUseSystemClipboard )
return mFeatureFields;
else
return retrieveFields();
}
void QgsClipboard::systemClipboardChanged()
{
if ( mIgnoreNextSystemClipboardChange )
{
mIgnoreNextSystemClipboardChange = false;
return;
}
mUseSystemClipboard = true;
emit changed();
}