QGIS API Documentation  3.23.0-Master (c716e02dd3)
qgsgeometrylinelayerintersectioncheck.cpp
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1 /***************************************************************************
2  qgsgeometrylinelayerintersectioncheck.cpp
3  ---------------------
4  begin : September 2017
5  copyright : (C) 2017 by Sandro Mani / Sourcepole AG
6  email : smani at sourcepole dot ch
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
18 #include "qgspolygon.h"
19 #include "qgslinestring.h"
20 #include "qgsfeaturepool.h"
21 #include "qgsgeometrycheckerror.h"
22 
23 void QgsGeometryLineLayerIntersectionCheck::collectErrors( const QMap<QString, QgsFeaturePool *> &featurePools, QList<QgsGeometryCheckError *> &errors, QStringList &messages, QgsFeedback *feedback, const LayerFeatureIds &ids ) const
24 {
25  Q_UNUSED( messages )
26 
27  QMap<QString, QgsFeatureIds> featureIds = ids.isEmpty() ? allLayerFeatureIds( featurePools ) : ids.toMap();
28  featureIds.remove( mCheckLayer ); // Don't check layer against itself
29  const QgsGeometryCheckerUtils::LayerFeatures layerFeatures( featurePools, featureIds, compatibleGeometryTypes(), feedback, mContext, true );
30  for ( const QgsGeometryCheckerUtils::LayerFeature &layerFeature : layerFeatures )
31  {
32  const QgsAbstractGeometry *geom = layerFeature.geometry().constGet();
33  for ( int iPart = 0, nParts = geom->partCount(); iPart < nParts; ++iPart )
34  {
35  const QgsLineString *line = dynamic_cast<const QgsLineString *>( QgsGeometryCheckerUtils::getGeomPart( geom, iPart ) );
36  if ( !line )
37  {
38  // Should not happen
39  continue;
40  }
41 
42  // Check whether the line intersects with any other features of the specified layer
43  const QgsGeometryCheckerUtils::LayerFeatures checkFeatures( featurePools, QStringList() << mCheckLayer, line->boundingBox(), {QgsWkbTypes::LineGeometry, QgsWkbTypes::PolygonGeometry}, mContext );
44  for ( const QgsGeometryCheckerUtils::LayerFeature &checkFeature : checkFeatures )
45  {
46  const QgsAbstractGeometry *testGeom = checkFeature.geometry().constGet();
47  for ( int jPart = 0, mParts = testGeom->partCount(); jPart < mParts; ++jPart )
48  {
49  const QgsAbstractGeometry *part = QgsGeometryCheckerUtils::getGeomPart( testGeom, jPart );
50  if ( const QgsLineString *testLine = dynamic_cast<const QgsLineString *>( part ) )
51  {
52  const QList< QgsPoint > intersections = QgsGeometryCheckerUtils::lineIntersections( line, testLine, mContext->tolerance );
53  for ( const QgsPoint &inter : intersections )
54  {
55  errors.append( new QgsGeometryCheckError( this, layerFeature, inter, QgsVertexId( iPart ), checkFeature.id() ) );
56  }
57  }
58  else if ( const QgsPolygon *polygon = dynamic_cast<const QgsPolygon *>( part ) )
59  {
60  const QList< const QgsLineString * > rings = QgsGeometryCheckerUtils::polygonRings( polygon );
61  for ( const QgsLineString *ring : rings )
62  {
63  const QList< QgsPoint > intersections = QgsGeometryCheckerUtils::lineIntersections( line, ring, mContext->tolerance );
64  for ( const QgsPoint &inter : intersections )
65  {
66  errors.append( new QgsGeometryCheckError( this, layerFeature, inter, QgsVertexId( iPart ), checkFeature.id() ) );
67  }
68  }
69  }
70  }
71  }
72  }
73  }
74 }
75 
76 void QgsGeometryLineLayerIntersectionCheck::fixError( const QMap<QString, QgsFeaturePool *> &featurePools, QgsGeometryCheckError *error, int method, const QMap<QString, int> & /*mergeAttributeIndices*/, Changes & /*changes*/ ) const
77 {
78  Q_UNUSED( featurePools )
79 
80  if ( method == NoChange )
81  {
82  error->setFixed( method );
83  }
84  else
85  {
86  error->setFixFailed( tr( "Unknown method" ) );
87  }
88 }
89 
91 {
92  static const QStringList methods = QStringList() << tr( "No action" );
93  return methods;
94 }
95 
97 {
99 }
Abstract base class for all geometries.
virtual int partCount() const =0
Returns count of parts contained in the geometry.
QgsRectangle boundingBox() const override
Returns the minimal bounding box for the geometry.
Definition: qgscurve.cpp:238
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
const double tolerance
The tolerance to allow for in geometry checks.
This represents an error reported by a geometry check.
void setFixed(int method)
Set the status to fixed and specify the method that has been used to fix the error.
void setFixFailed(const QString &reason)
Set the error status to failed and specify the reason for failure.
QMap< QString, QMap< QgsFeatureId, QList< QgsGeometryCheck::Change > > > Changes
A collection of changes.
const QgsGeometryCheckContext * mContext
CheckType
The type of a check.
@ FeatureNodeCheck
The check controls individual nodes.
QMap< QString, QgsFeatureIds > allLayerFeatureIds(const QMap< QString, QgsFeaturePool * > &featurePools) const
Returns all layers and feature ids.
A layer feature combination to uniquely identify and access a feature in a set of layers.
Contains a set of layers and feature ids in those layers to pass to a geometry check.
static QList< const QgsLineString * > polygonRings(const QgsPolygon *polygon)
static QgsAbstractGeometry * getGeomPart(QgsAbstractGeometry *geom, int partIdx)
static QList< QgsPoint > lineIntersections(const QgsLineString *line1, const QgsLineString *line2, double tol)
void collectErrors(const QMap< QString, QgsFeaturePool * > &featurePools, QList< QgsGeometryCheckError * > &errors, QStringList &messages, QgsFeedback *feedback, const LayerFeatureIds &ids=LayerFeatureIds()) const override
The main worker method.
Q_DECL_DEPRECATED QStringList resolutionMethods() const override
Returns a list of descriptions for available resolutions for errors.
void fixError(const QMap< QString, QgsFeaturePool * > &featurePools, QgsGeometryCheckError *error, int method, const QMap< QString, int > &mergeAttributeIndices, Changes &changes) const override
Fixes the error error with the specified method.
QList< QgsWkbTypes::GeometryType > compatibleGeometryTypes() const override
A list of geometry types for which this check can be performed.
Line string geometry type, with support for z-dimension and m-values.
Definition: qgslinestring.h:44
Point geometry type, with support for z-dimension and m-values.
Definition: qgspoint.h:49
Polygon geometry type.
Definition: qgspolygon.h:34
A list of layers and feature ids for each of these layers.
QMap< QString, QgsFeatureIds > toMap() const
Utility class for identifying a unique vertex within a geometry.
Definition: qgsvertexid.h:31