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a0bd464232
Avoids conversion of names later and gives clearer separation between visible names and internal names
143 lines
5.8 KiB
Python
143 lines
5.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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onesidebuffer.py
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---------------------
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Date : Janaury 2015
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Copyright : (C) 2015 by Giovanni Manghi
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Email : giovanni dot manghi at naturalgis dot pt
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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__ = 'Giovanni Manghi'
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__date__ = 'January 2015'
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__copyright__ = '(C) 2015, Giovanni Manghi'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterString
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from processing.core.parameters import ParameterNumber
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from processing.core.parameters import ParameterBoolean
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from processing.core.parameters import ParameterTableField
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from processing.core.parameters import ParameterSelection
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from processing.core.outputs import OutputVector
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from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
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from processing.algs.gdal.GdalUtils import GdalUtils
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from processing.tools import dataobjects
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from processing.tools.system import isWindows
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from processing.tools.vector import ogrConnectionString, ogrLayerName
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class OneSideBuffer(GdalAlgorithm):
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OUTPUT_LAYER = 'OUTPUT_LAYER'
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INPUT_LAYER = 'INPUT_LAYER'
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GEOMETRY = 'GEOMETRY'
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RADIUS = 'RADIUS'
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LEFTRIGHT = 'LEFTRIGHT'
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LEFTRIGHTLIST = ['Right', 'Left']
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DISSOLVEALL = 'DISSOLVEALL'
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FIELD = 'FIELD'
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MULTI = 'MULTI'
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OPTIONS = 'OPTIONS'
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def name(self):
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return 'singlesidedbufferforlines'
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def displayName(self):
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return self.tr('Single sided buffer for lines')
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def group(self):
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return self.tr('Vector geoprocessing')
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def defineCharacteristics(self):
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self.addParameter(ParameterVector(self.INPUT_LAYER,
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self.tr('Input layer'), [dataobjects.TYPE_VECTOR_LINE], False))
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self.addParameter(ParameterString(self.GEOMETRY,
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self.tr('Geometry column name ("geometry" for Shapefiles, may be different for other formats)'),
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'geometry', optional=False))
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self.addParameter(ParameterNumber(self.RADIUS,
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self.tr('Buffer distance'),
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0.0, 99999999.999999, 1000.0,
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optional=False))
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self.addParameter(ParameterSelection(self.LEFTRIGHT,
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self.tr('Buffer side'), self.LEFTRIGHTLIST, 0))
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self.addParameter(ParameterBoolean(self.DISSOLVEALL,
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self.tr('Dissolve all results'), False))
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self.addParameter(ParameterTableField(self.FIELD,
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self.tr('Dissolve by attribute'), self.INPUT_LAYER, optional=True))
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self.addParameter(ParameterBoolean(self.MULTI,
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self.tr('Output as singlepart geometries (only used when dissolving by attribute)'), False))
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self.addParameter(ParameterString(self.OPTIONS,
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self.tr('Additional creation options (see ogr2ogr manual)'),
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'', optional=True))
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self.addOutput(OutputVector(self.OUTPUT_LAYER, self.tr('Single sided buffer')))
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def getConsoleCommands(self):
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inLayer = self.getParameterValue(self.INPUT_LAYER)
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geometry = self.getParameterValue(self.GEOMETRY)
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distance = self.getParameterValue(self.RADIUS)
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leftright = self.getParameterValue(self.LEFTRIGHT)
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dissolveall = self.getParameterValue(self.DISSOLVEALL)
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field = self.getParameterValue(self.FIELD)
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multi = self.getParameterValue(self.MULTI)
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options = self.getParameterValue(self.OPTIONS)
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ogrLayer = ogrConnectionString(inLayer)[1:-1]
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layername = ogrLayerName(inLayer)
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output = self.getOutputFromName(self.OUTPUT_LAYER)
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outFile = output.value
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output = ogrConnectionString(outFile)
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layername = ogrLayerName(inLayer)
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arguments = []
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arguments.append(output)
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arguments.append(ogrLayer)
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arguments.append('-dialect')
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arguments.append('sqlite')
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arguments.append('-sql')
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if dissolveall or field is not None:
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sql = "SELECT ST_Union(ST_SingleSidedBuffer({}, {}, {})), * FROM '{}'".format(geometry, distance, leftright, layername)
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else:
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sql = "SELECT ST_SingleSidedBuffer({},{},{}), * FROM '{}'".format(geometry, distance, leftright, layername)
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if field is not None:
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sql = '"{} GROUP BY {}"'.format(sql, field)
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arguments.append(sql)
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if field is not None and multi:
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arguments.append('-explodecollections')
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if options is not None and len(options.strip()) > 0:
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arguments.append(options)
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commands = []
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if isWindows():
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commands = ['cmd.exe', '/C ', 'ogr2ogr.exe',
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GdalUtils.escapeAndJoin(arguments)]
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else:
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commands = ['ogr2ogr', GdalUtils.escapeAndJoin(arguments)]
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return commands
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def commandName(self):
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return 'ogr2ogr'
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