QGIS API Documentation  3.26.3-Buenos Aires (65e4edfdad)
qgsgeometrydegeneratepolygoncheck.cpp
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1 /***************************************************************************
2  qgsgeometrydegeneratepolygoncheck.cpp
3  ---------------------
4  begin : September 2015
5  copyright : (C) 2014 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 "qgsfeaturepool.h"
19 #include "qgsgeometrycheckerror.h"
20 
21 
22 void QgsGeometryDegeneratePolygonCheck::collectErrors( const QMap<QString, QgsFeaturePool *> &featurePools, QList<QgsGeometryCheckError *> &errors, QStringList &messages, QgsFeedback *feedback, const LayerFeatureIds &ids ) const
23 {
24  Q_UNUSED( messages )
25 
26  const QMap<QString, QgsFeatureIds> featureIds = ids.isEmpty() ? allLayerFeatureIds( featurePools ) : ids.toMap();
27  const QgsGeometryCheckerUtils::LayerFeatures layerFeatures( featurePools, featureIds, compatibleGeometryTypes(), feedback, mContext );
28  for ( const QgsGeometryCheckerUtils::LayerFeature &layerFeature : layerFeatures )
29  {
30  const QgsAbstractGeometry *geom = layerFeature.geometry().constGet();
31  for ( int iPart = 0, nParts = geom->partCount(); iPart < nParts; ++iPart )
32  {
33  for ( int iRing = 0, nRings = geom->ringCount( iPart ); iRing < nRings; ++iRing )
34  {
35  if ( QgsGeometryCheckerUtils::polyLineSize( geom, iPart, iRing ) < 3 )
36  {
37  const QgsVertexId vidx( iPart, iRing );
38  errors.append( new QgsGeometryCheckError( this, layerFeature, geom->vertexAt( vidx ), vidx ) );
39  }
40  }
41  }
42  }
43 }
44 
45 void QgsGeometryDegeneratePolygonCheck::fixError( const QMap<QString, QgsFeaturePool *> &featurePools, QgsGeometryCheckError *error, int method, const QMap<QString, int> & /*mergeAttributeIndices*/, Changes &changes ) const
46 {
47  QgsFeaturePool *featurePool = featurePools[ error->layerId() ];
48  QgsFeature feature;
49  if ( !featurePool->getFeature( error->featureId(), feature ) )
50  {
51  error->setObsolete();
52  return;
53  }
54  const QgsGeometry featureGeometry = feature.geometry();
55  const QgsAbstractGeometry *geom = featureGeometry.constGet();
56  const QgsVertexId vidx = error->vidx();
57 
58  // Check if ring still exists
59  if ( !vidx.isValid( geom ) )
60  {
61  error->setObsolete();
62  return;
63  }
64 
65  // Check if error still applies
66  if ( QgsGeometryCheckerUtils::polyLineSize( geom, vidx.part, vidx.ring ) >= 3 )
67  {
68  error->setObsolete();
69  return;
70  }
71 
72  // Fix error
73  if ( method == NoChange )
74  {
75  error->setFixed( method );
76  }
77  else if ( method == DeleteRing )
78  {
79  deleteFeatureGeometryRing( featurePools, error->layerId(), feature, vidx.part, vidx.ring, changes );
80  error->setFixed( method );
81  }
82  else
83  {
84  error->setFixFailed( tr( "Unknown method" ) );
85  }
86 }
87 
89 {
90  static const QStringList methods = QStringList() << tr( "Delete feature" ) << tr( "No action" );
91  return methods;
92 }
93 
95 {
97 }
QgsVertexId::part
int part
Part number.
Definition: qgsvertexid.h:89
QgsGeometryCheckError::setFixFailed
void setFixFailed(const QString &reason)
Set the error status to failed and specify the reason for failure.
Definition: qgsgeometrycheckerror.cpp:109
QgsGeometryDegeneratePolygonCheck::DeleteRing
@ DeleteRing
Definition: qgsgeometrydegeneratepolygoncheck.h:31
QgsGeometryCheckError::setObsolete
void setObsolete()
Set the error status to obsolete.
Definition: qgsgeometrycheckerror.h:166
QgsGeometryCheckError::featureId
QgsFeatureId featureId() const
The id of the feature on which this error has been detected.
Definition: qgsgeometrycheckerror.h:90
QgsGeometryCheck::Changes
QMap< QString, QMap< QgsFeatureId, QList< QgsGeometryCheck::Change > > > Changes
A collection of changes.
Definition: qgsgeometrycheck.h:220
QgsGeometryCheckerUtils::polyLineSize
static int polyLineSize(const QgsAbstractGeometry *geom, int iPart, int iRing, bool *isClosed=nullptr)
Returns the number of points in a polyline, accounting for duplicate start and end point if the polyl...
Definition: qgsgeometrycheckerutils.h:228
QgsGeometryCheck::allLayerFeatureIds
QMap< QString, QgsFeatureIds > allLayerFeatureIds(const QMap< QString, QgsFeaturePool * > &featurePools) const
Returns all layers and feature ids.
Definition: qgsgeometrycheck.cpp:82
QgsGeometryCheck::LayerFeatureIds::isEmpty
bool isEmpty() const
Definition: qgsgeometrycheck.h:117
QgsFeature::geometry
QgsGeometry geometry
Definition: qgsfeature.h:71
QgsGeometryCheck::FeatureNodeCheck
@ FeatureNodeCheck
The check controls individual nodes.
Definition: qgsgeometrycheck.h:156
QgsAbstractGeometry::partCount
virtual int partCount() const =0
Returns count of parts contained in the geometry.
qgsgeometrycheckerror.h
QgsFeaturePool::getFeature
bool getFeature(QgsFeatureId id, QgsFeature &feature)
Retrieves the feature with the specified id into feature.
Definition: qgsfeaturepool.cpp:41
QgsGeometryCheck::LayerFeatureIds::toMap
QMap< QString, QgsFeatureIds > toMap() const
Definition: qgsgeometrycheck.h:112
qgsgeometrydegeneratepolygoncheck.h
qgsfeaturepool.h
QgsAbstractGeometry::vertexAt
virtual QgsPoint vertexAt(QgsVertexId id) const =0
Returns the point corresponding to a specified vertex id.
qgsgeometrycheckcontext.h
QgsGeometryDegeneratePolygonCheck::resolutionMethods
Q_DECL_DEPRECATED QStringList resolutionMethods() const override
Returns a list of descriptions for available resolutions for errors.
Definition: qgsgeometrydegeneratepolygoncheck.cpp:88
QgsGeometryCheckError::setFixed
void setFixed(int method)
Set the status to fixed and specify the method that has been used to fix the error.
Definition: qgsgeometrycheckerror.cpp:98
QgsGeometryDegeneratePolygonCheck::fixError
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.
Definition: qgsgeometrydegeneratepolygoncheck.cpp:45
QgsGeometryCheck::deleteFeatureGeometryRing
void deleteFeatureGeometryRing(const QMap< QString, QgsFeaturePool * > &featurePools, const QString &layerId, QgsFeature &feature, int partIdx, int ringIdx, Changes &changes) const
Deletes a ring in a feature geometry.
Definition: qgsgeometrycheck.cpp:142
QgsFeedback
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:44
QgsGeometryCheckerUtils::LayerFeature
A layer feature combination to uniquely identify and access a feature in a set of layers.
Definition: qgsgeometrycheckerutils.h:51
QgsGeometryCheck::LayerFeatureIds
A list of layers and feature ids for each of these layers.
Definition: qgsgeometrycheck.h:104
QgsGeometryCheckError::vidx
const QgsVertexId & vidx() const
The id of the affected vertex.
Definition: qgsgeometrycheckerror.h:140
QgsGeometry::constGet
const QgsAbstractGeometry * constGet() const SIP_HOLDGIL
Returns a non-modifiable (const) reference to the underlying abstract geometry primitive.
Definition: qgsgeometry.cpp:136
QgsGeometryDegeneratePolygonCheck::collectErrors
void collectErrors(const QMap< QString, QgsFeaturePool * > &featurePools, QList< QgsGeometryCheckError * > &errors, QStringList &messages, QgsFeedback *feedback, const LayerFeatureIds &ids=LayerFeatureIds()) const override
The main worker method.
Definition: qgsgeometrydegeneratepolygoncheck.cpp:22
QgsAbstractGeometry
Abstract base class for all geometries.
Definition: qgsabstractgeometry.h:79
QgsGeometryCheck::mContext
const QgsGeometryCheckContext * mContext
Definition: qgsgeometrycheck.h:365
QgsVertexId::isValid
bool isValid() const SIP_HOLDGIL
Returns true if the vertex id is valid.
Definition: qgsvertexid.h:46
QgsGeometry
A geometry is the spatial representation of a feature.
Definition: qgsgeometry.h:124
QgsGeometryCheckerUtils::LayerFeatures
Contains a set of layers and feature ids in those layers to pass to a geometry check.
Definition: qgsgeometrycheckerutils.h:112
QgsGeometryCheck::CheckType
CheckType
The type of a check.
Definition: qgsgeometrycheck.h:154
QgsVertexId
Utility class for identifying a unique vertex within a geometry.
Definition: qgsvertexid.h:30
QgsVertexId::ring
int ring
Ring number.
Definition: qgsvertexid.h:92
QgsFeature
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Definition: qgsfeature.h:55
QgsGeometryDegeneratePolygonCheck::factoryCheckType
static QgsGeometryCheck::CheckType factoryCheckType()
Definition: qgsgeometrydegeneratepolygoncheck.cpp:94
QgsGeometryCheckError::layerId
const QString & layerId() const
The id of the layer on which this error has been detected.
Definition: qgsgeometrycheckerror.h:85
QgsGeometryCheckError
This represents an error reported by a geometry check.
Definition: qgsgeometrycheckerror.h:35
QgsAbstractGeometry::ringCount
virtual int ringCount(int part=0) const =0
Returns the number of rings of which this geometry is built.
QgsGeometryDegeneratePolygonCheck::compatibleGeometryTypes
QList< QgsWkbTypes::GeometryType > compatibleGeometryTypes() const override
A list of geometry types for which this check can be performed.
Definition: qgsgeometrydegeneratepolygoncheck.h:39
QgsGeometryDegeneratePolygonCheck::NoChange
@ NoChange
Definition: qgsgeometrydegeneratepolygoncheck.h:31
QgsFeaturePool
A feature pool is based on a vector layer and caches features.
Definition: qgsfeaturepool.h:37