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147 lines
4.6 KiB
Python
147 lines
4.6 KiB
Python
"""
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***************************************************************************
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LinesToPolygons.py
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---------------------
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Date : August 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = "Victor Olaya"
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__date__ = "August 2012"
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__copyright__ = "(C) 2012, Victor Olaya"
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import os
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from qgis.PyQt.QtGui import QIcon
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from qgis.core import (
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QgsApplication,
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QgsFeature,
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QgsGeometry,
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QgsGeometryCollection,
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QgsPolygon,
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QgsMultiPolygon,
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QgsMultiSurface,
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QgsWkbTypes,
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QgsFeatureSink,
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QgsProcessing,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterFeatureSink,
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QgsProcessingUtils,
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)
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from processing.algs.qgis.QgisAlgorithm import QgisFeatureBasedAlgorithm
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from processing.tools import dataobjects, vector
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class LinesToPolygons(QgisFeatureBasedAlgorithm):
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def icon(self):
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return QgsApplication.getThemeIcon("/algorithms/mAlgorithmLineToPolygon.svg")
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def svgIconPath(self):
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return QgsApplication.iconPath("/algorithms/mAlgorithmLineToPolygon.svg")
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def tags(self):
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return self.tr("line,polygon,convert").split(",")
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def group(self):
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return self.tr("Vector geometry")
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def groupId(self):
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return "vectorgeometry"
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def __init__(self):
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super().__init__()
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def name(self):
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return "linestopolygons"
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def displayName(self):
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return self.tr("Lines to polygons")
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def outputName(self):
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return self.tr("Polygons")
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def outputType(self):
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return QgsProcessing.SourceType.TypeVectorPolygon
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def inputLayerTypes(self):
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return [QgsProcessing.SourceType.TypeVectorLine]
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def outputWkbType(self, input_wkb_type):
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return self.convertWkbToPolygons(input_wkb_type)
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def processFeature(self, feature, context, feedback):
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if feature.hasGeometry():
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feature.setGeometry(QgsGeometry(self.convertToPolygons(feature.geometry())))
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if feature.geometry().isEmpty():
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feedback.reportError(
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self.tr(
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"One or more line ignored due to geometry not having a minimum of three vertices."
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)
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)
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return [feature]
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def supportInPlaceEdit(self, layer):
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return False
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def convertWkbToPolygons(self, wkb):
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multi_wkb = QgsWkbTypes.Type.NoGeometry
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if (
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QgsWkbTypes.singleType(QgsWkbTypes.flatType(wkb))
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== QgsWkbTypes.Type.LineString
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):
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multi_wkb = QgsWkbTypes.Type.MultiPolygon
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elif (
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QgsWkbTypes.singleType(QgsWkbTypes.flatType(wkb))
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== QgsWkbTypes.Type.CompoundCurve
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):
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multi_wkb = QgsWkbTypes.Type.MultiSurface
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if QgsWkbTypes.hasM(wkb):
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multi_wkb = QgsWkbTypes.addM(multi_wkb)
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if QgsWkbTypes.hasZ(wkb):
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multi_wkb = QgsWkbTypes.addZ(multi_wkb)
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return multi_wkb
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def convertToPolygons(self, geometry):
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surfaces = self.getSurfaces(geometry.constGet())
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output_wkb = self.convertWkbToPolygons(geometry.wkbType())
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out_geom = None
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if QgsWkbTypes.flatType(output_wkb) == QgsWkbTypes.Type.MultiPolygon:
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out_geom = QgsMultiPolygon()
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else:
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out_geom = QgsMultiSurface()
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for surface in surfaces:
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out_geom.addGeometry(surface)
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return out_geom
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def getSurfaces(self, geometry):
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surfaces = []
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if isinstance(geometry, QgsGeometryCollection):
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# collection
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for i in range(geometry.numGeometries()):
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surfaces.extend(self.getSurfaces(geometry.geometryN(i)))
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else:
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# not collection
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if geometry.vertexCount() > 2:
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surface = QgsPolygon()
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surface.setExteriorRing(geometry.clone())
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surfaces.append(surface)
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return surfaces
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