def initializeSettings(self):
AlgorithmProvider.initializeSettings(self)
if isWindows() or isMac():
ProcessingConfig.addSetting(Setting(self.getDescription(),
Grass7Utils.GRASS_FOLDER, 'GRASS7 folder',
Grass7Utils.grassPath()))
ProcessingConfig.addSetting(Setting(self.getDescription(),
Grass7Utils.GRASS_WIN_SHELL, 'Msys folder',
Grass7Utils.grassWinShell()))
ProcessingConfig.addSetting(Setting(self.getDescription(),
Grass7Utils.GRASS_LOG_COMMANDS,
'Log execution commands', False))
ProcessingConfig.addSetting(Setting(self.getDescription(),
Grass7Utils.GRASS_LOG_CONSOLE,
'Log console output', False))
def processAlgorithm(self, progress):
commands = []
vector = self.getParameterValue(self.VECTOR)
elevation = self.getParameterValue(self.ELEVATION)
color = self.getParameterValue(self.COLOR)
region = \
str(self.getParameterValue(self.GRASS_REGION_EXTENT_PARAMETER))
regionCoords = region.split(',')
command = 'g.region '
command += 'n=' + str(regionCoords[3])
command += ' s=' + str(regionCoords[2])
command += ' e=' + str(regionCoords[1])
command += ' w=' + str(regionCoords[0])
cellsize = self.getParameterValue(self.GRASS_REGION_CELLSIZE_PARAMETER)
if cellsize:
command += ' res=' + str(cellsize)
else:
command += ' res=' + str(self.getDefaultCellsize())
commands.append(command)
command = 'nviz7'
if vector:
layers = vector.split(';')
for layer in layers:
(cmd, newfilename) = self.exportVectorLayer(layer)
commands.append(cmd)
vector = vector.replace(layer, newfilename)
command += ' vector=' + vector.replace(';', ',')
if color:
layers = color.split(';')
for layer in layers:
(cmd, newfilename) = self.exportRasterLayer(layer)
commands.append(cmd)
color = color.replace(layer, newfilename)
command += ' color=' + color.replace(';', ',')
if elevation:
layers = elevation.split(';')
for layer in layers:
(cmd, newfilename) = self.exportRasterLayer(layer)
commands.append(cmd)
elevation = elevation.replace(layer, newfilename)
command += ' elevation=' + elevation.replace(';', ',')
if elevation is None and vector is None:
command += ' -q'
commands.append(command)
Grass7Utils.createTempMapset()
Grass7Utils.executeGrass7(commands, progress)
def checkBeforeOpeningParametersDialog(self):
msg = Grass7Utils.checkGrass7IsInstalled()
if msg is not None:
html = '<p>This algorithm requires GRASS GIS 7 to be run. \
Unfortunately, it seems that GRASS GIS 7 is not installed in \
your system, or it is not correctly configured to be used \
from QGIS</p>'
html += '<p><a href="http://docs.qgis.org/2.0/html/en/docs/user_manual/processing/3rdParty.html">Click here</a> to know more about how to install and configure GRASS GIS 7 to be used with QGIS</p>' # FIXME update URL or page
return html
def getPostProcessingErrorMessage(self, wrongLayers):
html = GeoAlgorithm.getPostProcessingErrorMessage(self, wrongLayers)
msg = Grass7Utils.checkGrass7IsInstalled(True)
html += '<p>This algorithm requires GRASS GIS 7 to be run. A test \
to check if GRASS GIS 7 is correctly installed and configured in \
your system has been performed, with the following \
result:</p><ul><i>'
if msg is None:
html += 'GRASS GIS 7 seems to be correctly installed and \
configured</i></li></ul>'
else:
html += msg + '</i></li></ul>'
html += '<p><a href= "http://docs.qgis.org/2.0/html/en/docs/user_manual/processing/3rdParty.html">Click here</a> to know more about how to install and configure GRASS GIS 7 to be used with QGIS</p>'
return html
def createAlgsList(self):
self.preloadedAlgs = []
folder = Grass7Utils.grassDescriptionPath()
for descriptionFile in os.listdir(folder):
if descriptionFile.endswith('txt'):
try:
alg = Grass7Algorithm(os.path.join(folder, descriptionFile))
if alg.name.strip() != '':
self.preloadedAlgs.append(alg)
else:
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
'Could not open GRASS GIS 7 algorithm: '
+ descriptionFile)
except Exception, e:
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
'Could not open GRASS GIS 7 algorithm: '
+ descriptionFile)
def processAlgorithm(self, progress):
if system.isWindows():
path = Grass7Utils.grassPath()
if path == '':
raise GeoAlgorithmExecutionException('GRASS GIS 7 folder is not \
configured.\nPlease configure it before running GRASS GIS 7\
algorithms.')
commands = []
self.exportedLayers = {}
outputCommands = []
# If GRASS session has been created outside of this algorithm then
# get the list of layers loaded in GRASS otherwise start a new
# session
existingSession = Grass7Utils.sessionRunning
if existingSession:
self.exportedLayers = Grass7Utils.getSessionLayers()
else:
Grass7Utils.startGrass7Session()
# 1: Export layer to grass mapset
for param in self.parameters:
if isinstance(param, ParameterRaster):
if param.value is None:
continue
value = param.value
# Check if the layer hasn't already been exported in, for
# example, previous GRASS calls in this session
if value in self.exportedLayers.keys():
continue
else:
self.setSessionProjectionFromLayer(value, commands)
commands.append(self.exportRasterLayer(value))
if isinstance(param, ParameterVector):
if param.value is None:
continue
value = param.value
if value in self.exportedLayers.keys():
continue
else:
self.setSessionProjectionFromLayer(value, commands)
commands.append(self.exportVectorLayer(value))
if isinstance(param, ParameterTable):
pass
if isinstance(param, ParameterMultipleInput):
if param.value is None:
continue
layers = param.value.split(';')
if layers is None or len(layers) == 0:
continue
if param.datatype == ParameterMultipleInput.TYPE_RASTER:
for layer in layers:
if layer in self.exportedLayers.keys():
continue
else:
self.setSessionProjectionFromLayer(layer, commands)
commands.append(self.exportRasterLayer(layer))
elif param.datatype == ParameterMultipleInput.TYPE_VECTOR_ANY:
for layer in layers:
if layer in self.exportedLayers.keys():
continue
else:
self.setSessionProjectionFromLayer(layer, commands)
commands.append(self.exportVectorLayer(layer))
self.setSessionProjectionFromProject(commands)
region = \
str(self.getParameterValue(self.GRASS_REGION_EXTENT_PARAMETER))
regionCoords = region.split(',')
command = 'g.region'
command += ' n=' + str(regionCoords[3])
command += ' s=' + str(regionCoords[2])
command += ' e=' + str(regionCoords[1])
command += ' w=' + str(regionCoords[0])
cellsize = self.getParameterValue(self.GRASS_REGION_CELLSIZE_PARAMETER)
if cellsize:
command += ' res=' + str(cellsize)
else:
command += ' res=' + str(self.getDefaultCellsize())
alignToResolution = \
self.getParameterValue(self.GRASS_REGION_ALIGN_TO_RESOLUTION)
if alignToResolution:
command += ' -a'
commands.append(command)
# 2: Set parameters and outputs
command = self.grassName
for param in self.parameters:
if param.value is None or param.value == '':
continue
if param.name == self.GRASS_REGION_CELLSIZE_PARAMETER \
or param.name == self.GRASS_REGION_EXTENT_PARAMETER \
or param.name == self.GRASS_MIN_AREA_PARAMETER or param.name \
== self.GRASS_SNAP_TOLERANCE_PARAMETER or param.name \
== self.GRASS_OUTPUT_TYPE_PARAMETER or param.name \
== self.GRASS_REGION_ALIGN_TO_RESOLUTION:
continue
if isinstance(param, (ParameterRaster, ParameterVector)):
value = param.value
if value in self.exportedLayers.keys():
command += ' ' + param.name + '=' \
+ self.exportedLayers[value]
else:
command += ' ' + param.name + '=' + value
elif isinstance(param, ParameterMultipleInput):
s = param.value
for layer in self.exportedLayers.keys():
s = s.replace(layer, self.exportedLayers[layer])
s = s.replace(';', ',')
command += ' ' + param.name + '=' + s
elif isinstance(param, ParameterBoolean):
if param.value:
command += ' ' + param.name
elif isinstance(param, ParameterSelection):
idx = int(param.value)
command += ' ' + param.name + '=' + str(param.options[idx])
elif isinstance(param, ParameterString):
command += ' ' + param.name + '="' + str(param.value) + '"'
else:
command += ' ' + param.name + '="' + str(param.value) + '"'
uniqueSufix = str(uuid.uuid4()).replace('-', '')
for out in self.outputs:
if isinstance(out, OutputFile):
if out.name == 'outputtext':
# The 'outputtext' file is generated by piping output
# from GRASS, is not an actual grass command
command += ' > ' + out.value
else:
command += ' ' + out.name + '="' + out.value + '"'
elif not isinstance(out, OutputHTML):
# Html files are not generated by GRASS, only by us to
# decorate GRASS output, so we skip them. An output name
# to make sure it is unique if the session uses this
# algorithm several times.
uniqueOutputName = out.name + uniqueSufix
command += ' ' + out.name + '=' + uniqueOutputName
# Add output file to exported layers, to indicate that
# they are present in GRASS
self.exportedLayers[out.value] = uniqueOutputName
command += ' --overwrite'
commands.append(command)
# 3: Export resulting layers to a format that qgis can read
for out in self.outputs:
if isinstance(out, OutputRaster):
filename = out.value
# Raster layer output: adjust region to layer before
# exporting
commands.append('g.region rast=' + out.name + uniqueSufix)
outputCommands.append('g.region rast=' + out.name
+ uniqueSufix)
if self.grassName == 'r.composite':
command = 'r.out.tiff -t --verbose'
command += ' input='
command += out.name + uniqueSufix
command += ' output="' + filename + '"'
commands.append(command)
outputCommands.append(command)
else:
command = 'r.out.gdal -c createopt="TFW=YES,COMPRESS=LZW"'
command += ' input='
if self.grassName == 'r.horizon':
command += out.name + uniqueSufix + '_0'
else:
command += out.name + uniqueSufix
command += ' output="' + filename + '"'
commands.append(command)
outputCommands.append(command)
if isinstance(out, OutputVector):
filename = out.value
# FIXME: check if needed: -c Also export features without category (not labeled). Otherwise only features with category are exported.
command = 'v.out.ogr -s -e input=' + out.name + uniqueSufix
command += ' dsn="' + os.path.dirname(out.value) + '"'
command += ' format=ESRI_Shapefile'
command += ' olayer=' + os.path.basename(out.value)[:-4]
typeidx = \
self.getParameterValue(self.GRASS_OUTPUT_TYPE_PARAMETER)
outtype = ('auto' if typeidx
is None else self.OUTPUT_TYPES[typeidx])
command += ' type=' + outtype
commands.append(command)
outputCommands.append(command)
# 4: Run GRASS
loglines = []
loglines.append('GRASS GIS 7 execution commands')
for line in commands:
progress.setCommand(line)
loglines.append(line)
if ProcessingConfig.getSetting(Grass7Utils.GRASS_LOG_COMMANDS):
ProcessingLog.addToLog(ProcessingLog.LOG_INFO, loglines)
self.consoleOutput = Grass7Utils.executeGrass7(commands, progress,
outputCommands)
self.postProcessResults()
# If the session has been created outside of this algorithm, add
# the new GRASS GIS 7 layers to it otherwise finish the session
if existingSession:
Grass7Utils.addSessionLayers(self.exportedLayers)
else:
Grass7Utils.endGrass7Session()
