Marble

KmlNdTagHandler.cpp
1 // SPDX-License-Identifier: LGPL-2.1-or-later
2 //
3 // SPDX-FileCopyrightText: 2015 Marius-Valeriu Stanciu <[email protected]>
4 //
5 
6 // Self
7 #include "KmlNdTagHandler.h"
8 
9 // Marble
10 #include "KmlElementDictionary.h"
11 #include "GeoDataExtendedData.h"
12 #include "GeoDataGeometry.h"
13 #include "GeoDataPlacemark.h"
14 #include "GeoDataLineString.h"
15 #include "GeoDataLinearRing.h"
16 #include "GeoDataPolygon.h"
17 #include "GeoDataPoint.h"
18 #include "osm/OsmPlacemarkData.h"
19 
20 // Qt
21 #include <QDebug>
22 
23 namespace Marble
24 {
25 namespace kml
26 {
27 KML_DEFINE_TAG_HANDLER_MX( nd )
28 
29 GeoNode* KmlndTagHandler::parse( GeoParser& parser ) const
30 {
31  int ndIndex = parser.attribute( "index" ).toInt();
32  /* Case 1: node of a line placemark:
33  *...
34  * <Placemark>
35  * <ExtendedData>
36  * <mx:OsmPlacemarkData>
37  * <mx:nd index="0">...</nd>
38  * <mx:nd index="1">...</nd>
39  * ...
40  */
41  if( parser.parentElement().represents( kmlTag_OsmPlacemarkData ) && parser.parentElement( 2 ).is<GeoDataPlacemark>() ) {
42  GeoDataPlacemark *placemark = parser.parentElement( 2 ).nodeAs<GeoDataPlacemark>();
43  if (auto lineString = geodata_cast<GeoDataLineString>(placemark->geometry())) {
44  // Using GeoDataPoint because GeoDataCoordinates is not a GeoNode, so it can't be returned.
45  GeoDataPoint *point = new GeoDataPoint( lineString->at( ndIndex ) );
46  return point;
47  }
48  return nullptr;
49  }
50  /* Case 2: node of a polygon's boundary
51  *...
52  * <Placemark>
53  * <ExtendedData>
54  * <mx:OsmPlacemarkData>
55  * <mx:member>
56  * <mx:OsmPlacemarkData>
57  * <mx:nd index="0">...</nd>
58  * <mx:nd index="1">...</nd>
59  * ...
60  */
61  else if ( parser.parentElement().represents( kmlTag_OsmPlacemarkData ) && parser.parentElement( 1 ).is<GeoDataLinearRing>() ) {
62  GeoDataLinearRing *linearRing = parser.parentElement( 1 ).nodeAs<GeoDataLinearRing>();
63 
64  // Using GeoDataPoint because GeoDataCoordinates is not a GeoNode, so it can't be returned.
65  GeoDataPoint *point = new GeoDataPoint( linearRing->at( ndIndex ) );
66  return point;
67  }
68  return nullptr;
69 }
70 }
71 }
Binds a QML item to a specific geodetic location in screen coordinates.
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