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# -*- coding: utf-8 -*-
"""
***************************************************************************
ScriptAlgorithm.py
---------------------
Date : August 2012
Copyright : (C) 2012 by Victor Olaya
Email : volayaf at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
from PyQt4 import QtGui
from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.gui.Help2Html import getHtmlFromHelpFile
from processing.parameters.ParameterRaster import ParameterRaster
from processing.parameters.ParameterTable import ParameterTable
from processing.parameters.ParameterVector import ParameterVector
from processing.parameters.ParameterMultipleInput import ParameterMultipleInput
from processing.parameters.ParameterString import ParameterString
from processing.parameters.ParameterCrs import ParameterCrs
from processing.parameters.ParameterNumber import ParameterNumber
from processing.parameters.ParameterBoolean import ParameterBoolean
from processing.parameters.ParameterSelection import ParameterSelection
from processing.parameters.ParameterTableField import ParameterTableField
from processing.parameters.ParameterExtent import ParameterExtent
from processing.parameters.ParameterFile import ParameterFile
from processing.parameters.ParameterFactory import ParameterFactory
from processing.outputs.OutputTable import OutputTable
from processing.outputs.OutputVector import OutputVector
from processing.outputs.OutputRaster import OutputRaster
from processing.outputs.OutputNumber import OutputNumber
from processing.outputs.OutputString import OutputString
from processing.outputs.OutputHTML import OutputHTML
from processing.outputs.OutputFile import OutputFile
from processing.outputs.OutputDirectory import OutputDirectory
from processing.outputs.OutputFactory import OutputFactory
from processing.script.WrongScriptException import WrongScriptException
class ScriptAlgorithm(GeoAlgorithm):
def __init__(self, descriptionFile, script=None):
"""The script parameter can be used to directly pass the code
of the script without a file.
This is to be used from the script edition dialog, but should
not be used in other cases.
"""
GeoAlgorithm.__init__(self)
self.script = script
self.descriptionFile = descriptionFile
if script is not None:
self.defineCharacteristicsFromScript()
if descriptionFile is not None:
self.defineCharacteristicsFromFile()
def getCopy(self):
newone = ScriptAlgorithm(self.descriptionFile)
newone.provider = self.provider
return newone
def getIcon(self):
return QtGui.QIcon(os.path.dirname(__file__) + '/../images/script.png')
def defineCharacteristicsFromFile(self):
self.script = ''
self.silentOutputs = []
filename = os.path.basename(self.descriptionFile)
self.name = filename[:filename.rfind('.')].replace('_', ' ')
self.group = 'User scripts'
lines = open(self.descriptionFile)
line = lines.readline()
while line != '':
if line.startswith('##'):
try:
self.processParameterLine(line.strip('\n'))
except:
raise WrongScriptException('Could not load script: '
+ self.descriptionFile + '\n'
+ 'Problem with line: ' + line)
self.script += line
line = lines.readline()
lines.close()
if self.group == '[Test scripts]':
self.showInModeler = False
self.showInToolbox = False
def defineCharacteristicsFromScript(self):
lines = self.script.split('\n')
self.silentOutputs = []
self.name = '[Unnamed algorithm]'
self.group = 'User scripts'
for line in lines:
if line.startswith('##'):
try:
self.processParameterLine(line.strip('\n'))
except:
pass
def createDescriptiveName(self, s):
return s.replace('_', ' ')
def processParameterLine(self, line):
param = None
out = None
line = line.replace('#', '')
# If the line is in the format of the text description files for
# normal algorithms, then process it using parameter and output
# factories
if '|' in line:
self.processDescriptionParameterLine(line)
return
if line == "nomodeler":
self.showInModeler = False
return
tokens = line.split('=', 1)
desc = self.createDescriptiveName(tokens[0])
if tokens[1].lower().strip() == 'group':
self.group = tokens[0]
return
if tokens[1].lower().strip() == 'name':
self.name = tokens[0]
return
if tokens[1].lower().strip() == 'raster':
param = ParameterRaster(tokens[0], desc, False)
elif tokens[1].lower().strip() == 'vector':
param = ParameterVector(tokens[0], desc,
[ParameterVector.VECTOR_TYPE_ANY])
elif tokens[1].lower().strip() == 'vector point':
param = ParameterVector(tokens[0], desc,
[ParameterVector.VECTOR_TYPE_POINT])
elif tokens[1].lower().strip() == 'vector line':
param = ParameterVector(tokens[0], desc,
[ParameterVector.VECTOR_TYPE_LINE])
elif tokens[1].lower().strip() == 'vector polygon':
param = ParameterVector(tokens[0], desc,
[ParameterVector.VECTOR_TYPE_POLYGON])
elif tokens[1].lower().strip() == 'table':
param = ParameterTable(tokens[0], desc, False)
elif tokens[1].lower().strip() == 'multiple raster':
param = ParameterMultipleInput(tokens[0], desc,
ParameterMultipleInput.TYPE_RASTER)
param.optional = False
elif tokens[1].lower().strip() == 'multiple vector':
param = ParameterMultipleInput(tokens[0], desc,
ParameterMultipleInput.TYPE_VECTOR_ANY)
param.optional = False
elif tokens[1].lower().strip().startswith('selection'):
options = tokens[1].strip()[len('selection '):].split(';')
param = ParameterSelection(tokens[0], desc, options)
elif tokens[1].lower().strip().startswith('boolean'):
default = tokens[1].strip()[len('boolean') + 1:]
param = ParameterBoolean(tokens[0], desc, default)
elif tokens[1].lower().strip() == 'extent':
param = ParameterExtent(tokens[0], desc)
elif tokens[1].lower().strip() == 'file':
param = ParameterFile(tokens[0], desc, False)
elif tokens[1].lower().strip() == 'folder':
param = ParameterFile(tokens[0], desc, True)
elif tokens[1].lower().strip().startswith('number'):
default = tokens[1].strip()[len('number') + 1:]
param = ParameterNumber(tokens[0], desc, default=default)
elif tokens[1].lower().strip().startswith('field'):
field = tokens[1].strip()[len('field') + 1:]
found = False
for p in self.parameters:
if p.name == field:
found = True
break
if found:
param = ParameterTableField(tokens[0], desc, field)
elif tokens[1].lower().strip().startswith('string'):
default = tokens[1].strip()[len('string') + 1:]
param = ParameterString(tokens[0], desc, default)
elif tokens[1].lower().strip().startswith('longstring'):
default = tokens[1].strip()[len('longstring') + 1:]
param = ParameterString(tokens[0], desc, default, multiline = True)
elif tokens[1].lower().strip().startswith('crs'):
default = tokens[1].strip()[len('crs') + 1:]
if not default:
default = 'EPSG:4326'
param = ParameterCrs(tokens[0], desc, default)
elif tokens[1].lower().strip().startswith('output raster'):
out = OutputRaster()
elif tokens[1].lower().strip().startswith('output vector'):
out = OutputVector()
elif tokens[1].lower().strip().startswith('output table'):
out = OutputTable()
elif tokens[1].lower().strip().startswith('output html'):
out = OutputHTML()
elif tokens[1].lower().strip().startswith('output file'):
out = OutputFile()
subtokens = tokens[1].split(' ')
if len(subtokens > 2):
out.ext = subtokens[2]
elif tokens[1].lower().strip().startswith('output directory'):
out = OutputDirectory()
elif tokens[1].lower().strip().startswith('output number'):
out = OutputNumber()
elif tokens[1].lower().strip().startswith('output string'):
out = OutputString()
if param is not None:
self.addParameter(param)
elif out is not None:
out.name = tokens[0]
out.description = desc
self.addOutput(out)
else:
raise WrongScriptException('Could not load script:'
+ self.descriptionFile or ''
+ '.\n Problem with line "' + line + '"'
)
def processDescriptionParameterLine(self, line):
try:
if line.startswith('Parameter'):
self.addParameter(ParameterFactory.getFromString(line))
elif line.startswith('*Parameter'):
param = ParameterFactory.getFromString(line[1:])
param.isAdvanced = True
self.addParameter(param)
else:
self.addOutput(OutputFactory.getFromString(line))
except Exception:
raise WrongScriptException('Could not load script:'
+ self.descriptionFile or ''
+ '.\n Problem with line "' + line + '"'
)
def processAlgorithm(self, progress):
script = 'import processing\n'
ns = {}
ns['progress'] = progress
print self.parameters
for param in self.parameters:
print param.name
ns[param.name] = param.value
for out in self.outputs:
ns[out.name] = out.value
script += self.script
exec script in ns
for out in self.outputs:
out.setValue(ns[out.name])
def help(self):
if self.descriptionFile is None:
return False, None
helpfile = self.descriptionFile + '.help'
if os.path.exists(helpfile):
return True, getHtmlFromHelpFile(self, helpfile)
else:
return False, None
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