mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-30 00:07:09 -04:00
308 lines
10 KiB
Python
308 lines
10 KiB
Python
"""
|
|
***************************************************************************
|
|
Output.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 sys
|
|
from qgis.core import *
|
|
from PyQt4.QtCore import *
|
|
from processing.tools.system import *
|
|
from processing.tools.vector import VectorWriter, TableWriter
|
|
from processing.tools import dataobjects
|
|
|
|
def getOutputFromString(s):
|
|
tokens = s.split("|")
|
|
params = [t if unicode(t) != "None" else None for t in tokens[1:]]
|
|
clazz = getattr(sys.modules[__name__], tokens[0])
|
|
return clazz(*params)
|
|
|
|
class Output(object):
|
|
|
|
def __init__(self, name='', description='', hidden=False):
|
|
self.name = name
|
|
self.description = description
|
|
|
|
# The value of an output is a string representing the location
|
|
# of the output. For a file based output, it should be the
|
|
# filepath to it.
|
|
self.value = None
|
|
|
|
# A hidden output will not be shown to the user, who will not
|
|
# be able to select where to store it. Use this to generate
|
|
# outputs that are modified version of inputs (like a selection
|
|
# in a vector layer). In the case of layers, hidden outputs are
|
|
# not loaded into QGIS after the algorithm is executed. Other
|
|
# outputs not representing layers or tables should always be hidden.
|
|
self.hidden = unicode(hidden).lower() == unicode(True).lower()
|
|
|
|
# This value indicates whether the output has to be opened
|
|
# after being produced by the algorithm or not
|
|
self.open = True
|
|
|
|
def __str__(self):
|
|
return self.name + ' <' + self.__class__.__name__ + '>'
|
|
|
|
def getValueAsCommandLineParameter(self):
|
|
if self.value is None:
|
|
return unicode(None)
|
|
else:
|
|
if not isWindows():
|
|
return '"' + unicode(self.value) + '"'
|
|
else:
|
|
return '"' + unicode(self.value).replace('\\', '\\\\') + '"'
|
|
|
|
def setValue(self, value):
|
|
try:
|
|
if value is not None and isinstance(value, basestring):
|
|
value = value.strip()
|
|
self.value = value
|
|
return True
|
|
except:
|
|
return False
|
|
|
|
def outputTypeName(self):
|
|
return self.__module__.split('.')[-1]
|
|
|
|
def tr(self, string, context=''):
|
|
if context == '':
|
|
context = 'Output'
|
|
return QCoreApplication.translate(context, string)
|
|
|
|
|
|
class OutputDirectory(Output):
|
|
directory = True
|
|
|
|
|
|
class OutputExtent(Output):
|
|
|
|
def __init__(self, name='', description=''):
|
|
self.name = name
|
|
self.description = description
|
|
self.value = None
|
|
self.hidden = True
|
|
|
|
def setValue(self, value):
|
|
try:
|
|
if value is not None and isinstance(value, basestring):
|
|
value = value.strip()
|
|
else:
|
|
self.value = ','.join([unicode(v) for v in value])
|
|
return True
|
|
except:
|
|
return False
|
|
|
|
|
|
class OutputFile(Output):
|
|
|
|
def __init__(self, name='', description='', ext = None):
|
|
Output.__init__(self, name, description)
|
|
self.ext = ext
|
|
|
|
def getFileFilter(self, alg):
|
|
if self.ext is None:
|
|
return self.tr('All files(*.*)', 'OutputFile')
|
|
else:
|
|
return self.tr('%s files(*.%s)', 'OutputFile') % (self.ext, self.ext)
|
|
|
|
def getDefaultFileExtension(self, alg):
|
|
return self.ext or 'file'
|
|
|
|
|
|
class OutputHTML(Output):
|
|
|
|
def getFileFilter(self, alg):
|
|
return self.tr('HTML files(*.html)', 'OutputHTML')
|
|
|
|
def getDefaultFileExtension(self, alg):
|
|
return 'html'
|
|
|
|
|
|
class OutputNumber(Output):
|
|
|
|
def __init__(self, name='', description=''):
|
|
self.name = name
|
|
self.description = description
|
|
self.value = None
|
|
self.hidden = True
|
|
|
|
|
|
class OutputRaster(Output):
|
|
|
|
compatible = None
|
|
|
|
def getFileFilter(self, alg):
|
|
providerExts = alg.provider.getSupportedOutputRasterLayerExtensions()
|
|
if providerExts == ['tif']:
|
|
# use default extensions
|
|
exts = dataobjects.getSupportedOutputRasterLayerExtensions()
|
|
else:
|
|
# use extensions given by the algorithm provider
|
|
exts = providerExts
|
|
for i in range(len(exts)):
|
|
exts[i] = self.tr('%s files(*.%s)', 'OutputRaster') % (exts[i].upper(), exts[i].lower())
|
|
return ';;'.join(exts)
|
|
|
|
def getDefaultFileExtension(self, alg):
|
|
return alg.provider.getSupportedOutputRasterLayerExtensions()[0]
|
|
|
|
def getCompatibleFileName(self, alg):
|
|
"""
|
|
Returns a filename that is compatible with the algorithm
|
|
that is going to generate this output. If the algorithm
|
|
supports the file format of the current output value, it
|
|
returns that value. If not, it returns a temporary file with
|
|
a supported file format, to be used to generate the output
|
|
result.
|
|
"""
|
|
|
|
ext = self.value[self.value.rfind('.') + 1:]
|
|
if ext in alg.provider.getSupportedOutputRasterLayerExtensions():
|
|
return self.value
|
|
else:
|
|
if self.compatible is None:
|
|
self.compatible = getTempFilenameInTempFolder(self.name + '.'
|
|
+ self.getDefaultFileExtension(alg))
|
|
return self.compatible
|
|
|
|
|
|
class OutputString(Output):
|
|
|
|
def __init__(self, name='', description=''):
|
|
self.name = name
|
|
self.description = description
|
|
self.value = None
|
|
self.hidden = True
|
|
|
|
|
|
class OutputTable(Output):
|
|
|
|
encoding = None
|
|
compatible = None
|
|
|
|
def getFileFilter(self, alg):
|
|
exts = ['csv']
|
|
for i in range(len(exts)):
|
|
exts[i] = exts[i].upper() + ' files(*.' + exts[i].lower() + ')'
|
|
return ';;'.join(exts)
|
|
|
|
def getDefaultFileExtension(self, alg):
|
|
return alg.provider.getSupportedOutputTableExtensions()[0]
|
|
|
|
def getCompatibleFileName(self, alg):
|
|
"""Returns a filename that is compatible with the algorithm
|
|
that is going to generate this output.
|
|
|
|
If the algorithm supports the file format of the current
|
|
output value, it returns that value. If not, it returns a
|
|
temporary file with a supported file format, to be used to
|
|
generate the output result.
|
|
"""
|
|
|
|
ext = self.value[self.value.rfind('.') + 1:]
|
|
if ext in alg.provider.getSupportedOutputTableExtensions():
|
|
return self.value
|
|
else:
|
|
if self.compatible is None:
|
|
self.compatible = getTempFilenameInTempFolder(self.name + '.'
|
|
+ self.getDefaultFileExtension(alg))
|
|
return self.compatible
|
|
|
|
def getTableWriter(self, fields):
|
|
"""
|
|
Returns a suitable writer to which records can be added as a
|
|
result of the algorithm. Use this to transparently handle
|
|
output values instead of creating your own method.
|
|
|
|
@param fields a list of field titles
|
|
|
|
@return writer instance of the table writer class
|
|
"""
|
|
|
|
if self.encoding is None:
|
|
settings = QSettings()
|
|
self.encoding = settings.value('/Processing/encoding', 'System')
|
|
|
|
return TableWriter(self.value, self.encoding, fields)
|
|
|
|
|
|
class OutputVector(Output):
|
|
|
|
encoding = None
|
|
compatible = None
|
|
|
|
def getFileFilter(self, alg):
|
|
exts = dataobjects.getSupportedOutputVectorLayerExtensions()
|
|
for i in range(len(exts)):
|
|
exts[i] = self.tr('%s files (*.%s)', 'OutputVector') % (exts[i].upper(), exts[i].lower())
|
|
return ';;'.join(exts)
|
|
|
|
def getDefaultFileExtension(self, alg):
|
|
return alg.provider.getSupportedOutputVectorLayerExtensions()[0]
|
|
|
|
def getCompatibleFileName(self, alg):
|
|
"""Returns a filename that is compatible with the algorithm
|
|
that is going to generate this output.
|
|
|
|
If the algorithm supports the file format of the current
|
|
output value, it returns that value. If not, it returns a
|
|
temporary file with a supported file format, to be used to
|
|
generate the output result.
|
|
"""
|
|
|
|
ext = self.value[self.value.rfind('.') + 1:]
|
|
if ext in alg.provider.getSupportedOutputVectorLayerExtensions():
|
|
return self.value
|
|
else:
|
|
if self.compatible is None:
|
|
self.compatible = getTempFilenameInTempFolder(self.name + '.'
|
|
+ self.getDefaultFileExtension(alg))
|
|
return self.compatible
|
|
|
|
def getVectorWriter(self, fields, geomType, crs, options=None):
|
|
"""Returns a suitable writer to which features can be added as
|
|
a result of the algorithm. Use this to transparently handle
|
|
output values instead of creating your own method.
|
|
|
|
Executing this method might modify the object, adding additional
|
|
information to it, so the writer can be later accessed and
|
|
processed within QGIS. It should be called just once, since a
|
|
new call might result in previous data being replaced, thus
|
|
rendering a previously obtained writer useless.
|
|
|
|
@param fields a list of QgsField
|
|
@param geomType a suitable geometry type, as it would be passed
|
|
to a QgsVectorFileWriter constructor
|
|
@param crs the crs of the layer to create
|
|
|
|
@return writer instance of the vector writer class
|
|
"""
|
|
|
|
if self.encoding is None:
|
|
settings = QSettings()
|
|
self.encoding = settings.value('/Processing/encoding', 'System', str)
|
|
|
|
w = VectorWriter(self.value, self.encoding, fields, geomType,
|
|
crs, options)
|
|
self.memoryLayer = w.memLayer
|
|
return w
|