PyLintInterface/PyLintConfigDialog.py

# -*- coding: utf-8 -*-

# Copyright (c) 2005 - 2021 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog to configure the PyLint process.
"""

import os
import copy

from PyQt6.QtCore import pyqtSlot, QProcess
from PyQt6.QtWidgets import QDialog

from EricWidgets.EricApplication import ericApp
from EricWidgets import EricMessageBox
from EricWidgets.EricPathPicker import EricPathPickerModes

from .Ui_PyLintConfigDialog import Ui_PyLintConfigDialog

import Preferences


class PyLintConfigDialog(QDialog, Ui_PyLintConfigDialog):
    """
    Class implementing a dialog to configure the PyLint process.
    """
    def __init__(self, ppath, exe, parms, version):
        """
        Constructor
        
        @param ppath project path; used to set the default path for the
            rcfile picker
        @type str
        @param exe name of the pylint executable
        @type str
        @param parms parameters to set in the dialog
        @type dict
        @param version pylint version (unused)
        @type str
        """
        super().__init__(None)
        self.setupUi(self)
        
        self.__version = version
        self.__pylintProc = None
        self.__lint = exe
        
        self.__initializeDefaults()
        
        # get a copy of the defaults to store the user settings
        self.parameters = copy.deepcopy(self.defaults)
        
        # combine it with the values of parms
        if parms is not None:
            self.parameters.update(parms)
        
        self.configfilePicker.setWindowTitle(
            self.tr("Select configuration file"))
        self.configfilePicker.setMode(EricPathPickerModes.OPEN_FILE_MODE)
        self.configfilePicker.setFilters(self.tr(
            "Configuration Files (*.cfg *.cnf *.rc);;"
            "All Files (*)"
        ))
        self.configfilePicker.setDefaultDirectory(ppath)
        
        self.reportfilePicker.setWindowTitle(
            self.tr("Select report file"))
        self.reportfilePicker.setMode(EricPathPickerModes.SAVE_FILE_MODE)
        self.reportfilePicker.setFilters(self.tr(
            "HTML Files (*.html);;"
            "Report Files (*.rpt);;"
            "Text Files (*.txt);;"
            "All Files (*)"
        ))
        
        
        # initialize general tab
        self.configfilePicker.setText(self.parameters['configFile'])
        self.txtOutputButton.setChecked(self.parameters['txtReport'])
        self.htmlOutputButton.setChecked(self.parameters['htmlReport'])
        self.dialogOutputButton.setChecked(self.parameters['dialogReport'])
        self.reportfilePicker.setText(self.parameters['reportFile'])
        
        # initialize checkers tab
        self.basicCheckBox.setChecked(self.parameters['enableBasic'])
        self.classesCheckBox.setChecked(self.parameters['enableClasses'])
        self.designCheckBox.setChecked(self.parameters['enableDesign'])
        self.exceptionsCheckBox.setChecked(self.parameters['enableExceptions'])
        self.formatCheckBox.setChecked(self.parameters['enableFormat'])
        self.importsCheckBox.setChecked(self.parameters['enableImports'])
        self.metricsCheckBox.setChecked(self.parameters['enableMetrics'])
        self.miscellaneousCheckBox.setChecked(
            self.parameters['enableMiscellaneous'])
        self.newstyleCheckBox.setChecked(self.parameters['enableNewstyle'])
        self.similaritiesCheckBox.setChecked(
            self.parameters['enableSimilarities'])
        self.typecheckCheckBox.setChecked(self.parameters['enableTypecheck'])
        self.variablesCheckBox.setChecked(self.parameters['enableVariables'])
        self.loggingCheckBox.setChecked(self.parameters['enableLogging'])
        self.stringFormatCheckBox.setChecked(
            self.parameters['enableStringFormat'])
        
        # initialize messages tab
        self.enabledMessagesEdit.setText(self.parameters['enabledMessages'])
        self.disabledMessagesEdit.setText(self.parameters['disabledMessages'])

    def __initializeDefaults(self):
        """
        Private method to set the default values.
        
        These are needed later on to generate the commandline
        parameters.
        """
        self.defaults = {
            # general options
            'configFile': '',
            'reportFile': '',
            'txtReport': False,
            'htmlReport': True,
            'dialogReport': False,
            
            # enabled checkers
            'enableBasic': True,
            'enableClasses': True,
            'enableDesign': True,
            'enableExceptions': True,
            'enableFormat': False,
            'enableImports': False,
            'enableLogging': True,
            'enableMetrics': True,
            'enableMiscellaneous': True,
            'enableNewstyle': True,
            'enableSimilarities': True,
            'enableStringFormat': True,
            'enableTypecheck': True,
            'enableVariables': True,
            
            # messages
            'enabledMessages': '',
            'disabledMessages': '',
        }

    def generateParameters(self):
        """
        Public method that generates the commandline parameters.
        
        It generates a list of strings to be used
        to set the QProcess arguments for the pylint call and
        a list containing the non default parameters. The second
        list can be passed back upon object generation to overwrite
        the default settings.
        
        <b>Note</b>: The arguments list contains the name of the pylint
        executable as the first parameter.
        
        @return a tuple of the commandline parameters and non default
            parameters
        @rtype tuple of (list of str, dict)
        """
        parms = {}
        args = []
        
        # 1. the program name
        args.append(self.__lint)
        
        # 2. the commandline options
        # 2.1 general options
        if self.parameters['configFile'] != self.defaults['configFile']:
            parms['configFile'] = self.parameters['configFile']
            args.append('--rcfile={0}'.format(self.parameters['configFile']))
        parms['txtReport'] = self.parameters['txtReport']
        parms['htmlReport'] = self.parameters['htmlReport']
        parms['dialogReport'] = self.parameters['dialogReport']
        if self.parameters['htmlReport']:
            args.append('--output-format=html')
        elif self.parameters['dialogReport']:
            args.append('--output-format=parseable')
            args.append('--reports=n')
        else:
            args.append('--output-format=text')
        if self.parameters['reportFile'] != self.defaults['reportFile']:
            parms['reportFile'] = self.parameters['reportFile']
        
        # 2.2 checkers options
        parms['enableBasic'] = self.parameters['enableBasic']
        parms['enableClasses'] = self.parameters['enableClasses']
        parms['enableDesign'] = self.parameters['enableDesign']
        parms['enableExceptions'] = self.parameters['enableExceptions']
        parms['enableFormat'] = self.parameters['enableFormat']
        parms['enableImports'] = self.parameters['enableImports']
        parms['enableMetrics'] = self.parameters['enableMetrics']
        parms['enableMiscellaneous'] = self.parameters['enableMiscellaneous']
        parms['enableNewstyle'] = self.parameters['enableNewstyle']
        parms['enableSimilarities'] = self.parameters['enableSimilarities']
        parms['enableTypecheck'] = self.parameters['enableTypecheck']
        parms['enableVariables'] = self.parameters['enableVariables']
        parms['enableLogging'] = self.parameters['enableLogging']
        parms['enableStringFormat'] = self.parameters['enableStringFormat']
        
        checkers = []
        if self.parameters['enableBasic']:
            checkers.append('basic')
        if self.parameters['enableClasses']:
            checkers.append('classes')
        if self.parameters['enableDesign']:
            checkers.append('design')
        if self.parameters['enableExceptions']:
            checkers.append('exceptions')
        if self.parameters['enableFormat']:
            checkers.append('format')
        if self.parameters['enableImports']:
            checkers.append('imports')
        if self.parameters['enableMetrics']:
            checkers.append('metrics')
        if self.parameters['enableMiscellaneous']:
            checkers.append('miscellaneous')
        if self.parameters['enableNewstyle']:
            checkers.append('newstyle')
        if self.parameters['enableSimilarities']:
            checkers.append('similarities')
        if self.parameters['enableTypecheck']:
            checkers.append('typecheck')
        if self.parameters['enableVariables']:
            checkers.append('variables')
        if self.parameters['enableLogging']:
            checkers.append('logging')
        if self.parameters['enableStringFormat']:
            checkers.append('string')
            
        args.append('--disable=all')
        if checkers:
            args.append('--enable={0}'.format(','.join(checkers)))
        
        # 2.3 messages options
        parms['enabledMessages'] = self.parameters['enabledMessages']
        parms['disabledMessages'] = self.parameters['disabledMessages']
        if parms['enabledMessages']:
            args.append('--enable={0}'.format(parms['enabledMessages']))
        if parms['disabledMessages']:
            args.append('--disable={0}'.format(parms['disabledMessages']))
        
        return (args, parms)

    def accept(self):
        """
        Public slot called by the Ok button.
        
        It saves the values in the parameters dictionary.
        """
        # get data of general tab
        self.parameters['configFile'] = self.configfilePicker.text()
        self.parameters['txtReport'] = self.txtOutputButton.isChecked()
        self.parameters['htmlReport'] = self.htmlOutputButton.isChecked()
        self.parameters['dialogReport'] = self.dialogOutputButton.isChecked()
        self.parameters['reportFile'] = self.reportfilePicker.text()
        
        # get data of checkers tab
        self.parameters['enableBasic'] = self.basicCheckBox.isChecked()
        self.parameters['enableClasses'] = self.classesCheckBox.isChecked()
        self.parameters['enableDesign'] = self.designCheckBox.isChecked()
        self.parameters['enableExceptions'] = (
            self.exceptionsCheckBox.isChecked())
        self.parameters['enableFormat'] = self.formatCheckBox.isChecked()
        self.parameters['enableImports'] = self.importsCheckBox.isChecked()
        self.parameters['enableMetrics'] = self.metricsCheckBox.isChecked()
        self.parameters['enableMiscellaneous'] = (
            self.miscellaneousCheckBox.isChecked())
        self.parameters['enableNewstyle'] = self.newstyleCheckBox.isChecked()
        self.parameters['enableSimilarities'] = (
            self.similaritiesCheckBox.isChecked())
        self.parameters['enableTypecheck'] = self.typecheckCheckBox.isChecked()
        self.parameters['enableVariables'] = self.variablesCheckBox.isChecked()
        self.parameters['enableLogging'] = self.loggingCheckBox.isChecked()
        self.parameters['enableStringFormat'] = (
            self.stringFormatCheckBox.isChecked())
        
        # get data of messages tab
        self.parameters['enabledMessages'] = ','.join(
            [m.strip() for m in self.enabledMessagesEdit.text().split(',')])
        self.parameters['disabledMessages'] = ','.join(
            [m.strip() for m in self.disabledMessagesEdit.text().split(',')])
        
        # call the accept slot of the base class
        super().accept()

    ###########################################################################
    ## Methods below are needed to generate a configuration file template
    ###########################################################################

    @pyqtSlot()
    def on_configButton_clicked(self):
        """
        Private slot to handle the generation of a sample configuration.
        """
        self.buf = ""
        self.__pylintProc = QProcess()
        args = []
        
        self.__ioEncoding = Preferences.getSystem("IOEncoding")
        
        args.append('--generate-rcfile')
        
        self.__pylintProc.readyReadStandardOutput.connect(self.__readStdout)
        self.__pylintProc.readyReadStandardError.connect(self.__readStderr)
        self.__pylintProc.finished.connect(self.__createConfigDone)
        
        self.__pylintProc.start(self.__lint, args)
        procStarted = self.__pylintProc.waitForStarted()
        if procStarted:
            ericApp().getObject("ViewManager").enableEditorsCheckFocusIn(False)
        else:
            EricMessageBox.critical(
                self,
                self.tr('Process Generation Error'),
                self.tr(
                    'Could not start {0}.<br>'
                    'Ensure that it is in the search path.'
                ).format(self.__lint))
    
    def __createConfigDone(self, exitCode, exitStatus):
        """
        Private slot to handle the the finished signal of the pylint process.
        
        @param exitCode exit code of the process
        @type int
        @param exitStatus exit status of the process
        @type QProcess.ExitStatus
        """
        vm = ericApp().getObject("ViewManager")
        vm.enableEditorsCheckFocusIn(True)
        if exitStatus == QProcess.ExitStatus.NormalExit and exitCode == 0:
            vm.newEditor()
            aw = vm.activeWindow()
            aw.insertAt(self.buf, 0, 0)
            aw.setLanguage('dummy.rc')
        self.reject()
    
    def __readStdout(self):
        """
        Private slot to handle the readyReadStandardOutput signal of the
        pylint process.
        """
        if self.__pylintProc is None:
            return
        
        self.__pylintProc.setReadChannel(
            QProcess.ProcessChannel.StandardOutput)
        
        while self.__pylintProc and self.__pylintProc.canReadLine():
            line = str(self.__pylintProc.readLine(), self.__ioEncoding,
                       "replace").rstrip()
            self.buf += line + os.linesep
        
    def __readStderr(self):
        """
        Private slot to handle the readyReadStandardError signal of the
        pylint process.
        """
        if self.__pylintProc is None:
            return
        
        self.__pylintProc.setReadChannel(
            QProcess.ProcessChannel.StandardError)
        while self.__pylintProc and self.__pylintProc.canReadLine():
            s = 'pylint: ' + str(
                self.__pylintProc.readLine(), self.__ioEncoding, "replace")
            ericApp().getObject("UserInterface").appendStderr.emit(s)