def _set_output_layer_style(layerName: str, layer: QgsMapLayer,
alg: QgsProcessingAlgorithm,
details: 'QgsProcessingContext::LayerDetails',
context: QgsProcessingContext, parameters) -> None:
""" Set layer style
Original code is from python/plugins/processing/gui/Postprocessing.py
"""
'''If running a model, the execution will arrive here when an algorithm that is part of
that model is executed. We check if its output is a final otuput of the model, and
adapt the output name accordingly'''
outputName = details.outputName
if parameters:
expcontext = QgsExpressionContext()
scope = QgsExpressionContextScope()
expcontext.appendScope(scope)
for out in alg.outputDefinitions():
if out.name() not in parameters:
continue
outValue = parameters[out.name()]
if hasattr(outValue, "sink"):
outValue = outValue.sink.valueAsString(expcontext)[0]
else:
outValue = str(outValue)
if outValue == layerName:
outputName = out.name()
break
style = None
if outputName:
# If a style with the same name as the outputName exists
# in workdir then use it
style = os.path.join(context.workdir, outputName + '.qml')
if not os.path.exists(style):
style = RenderingStyles.getStyle(alg.id(), outputName)
LOGGER.debug("Getting style for %s: %s <%s>", alg.id(), outputName,
style)
# Get defaults styles
if style is None:
if layer.type() == QgsMapLayer.RasterLayer:
style = ProcessingConfig.getSetting(ProcessingConfig.RASTER_STYLE)
else:
if layer.geometryType() == QgsWkbTypes.PointGeometry:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_POINT_STYLE)
elif layer.geometryType() == QgsWkbTypes.LineGeometry:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_LINE_STYLE)
else:
style = ProcessingConfig.getSetting(
ProcessingConfig.VECTOR_POLYGON_STYLE)
if style:
LOGGER.debug("Adding style '%s' to layer %s (outputName %s)", style,
details.name, outputName)
layer.loadNamedStyle(style)
LOGGER.debug("Layer name set to %s <details name: %s>", layer.name(),
details.name)
def parse_input_definitions(
alg: QgsProcessingAlgorithm,
context: MapContext) -> Generator[WPSInput, None, None]:
""" Parse algorithm inputs definitions
"""
for param in alg.parameterDefinitions():
try:
if not _is_hidden(param):
yield parse_input_definition(param, alg, context=context)
else:
LOGGER.info("%s: dropping hidden param: %s", alg.id(),
param.name())
except ProcessingTypeParseError as e:
LOGGER.error("%s: unsupported param %s", alg.id(), e)
def parse_output_definitions(
alg: QgsProcessingAlgorithm,
context: MapContext) -> Generator[WPSOutput, None, None]:
""" Parse algorithm inputs definitions
"""
for param in alg.outputDefinitions():
try:
yield parse_output_definition(param, alg, context=context)
except ProcessingTypeParseError as e:
LOGGER.error("%s: unsupported output param %s", alg.id(), e)
