eric6/UI/InstallInfoDialog.py

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

"""
Module implementing a dialog to show information about the installation.
"""

import json

from PyQt5.QtCore import pyqtSlot
from PyQt5.QtWidgets import QDialog

from E5Gui import E5MessageBox

from .Ui_InstallInfoDialog import Ui_InstallInfoDialog

import Globals
import UI.PixmapCache


# TODO: add install date output
class InstallInfoDialog(QDialog, Ui_InstallInfoDialog):
    """
    Class documentation goes here.
    """
    def __init__(self, parent=None):
        """
        Constructor
        
        @param parent reference to the parent widget
        @type QWidget
        """
        super(InstallInfoDialog, self).__init__(parent)
        self.setupUi(self)
        
        self.__edited = False
        self.__loaded = True
        
        self.editButton.setIcon(UI.PixmapCache.getIcon("infoEdit"))
        self.saveButton.setIcon(UI.PixmapCache.getIcon("fileSave"))
        
        infoFileName = Globals.getInstallInfoFilePath()
        try:
            with open(infoFileName, "r") as infoFile:
                self.__info = json.load(infoFile)
            
            self.sudoLabel.setText(
                self.tr("Yes") if self.__info["sudo"] else self.tr("No"))
            self.userLabel.setText(self.__info["user"])
            self.interpreteEdit.setText(self.__info["exe"])
            self.commandEdit.setText(self.__info["argv"])
            self.installPathEdit.setText(self.__info["eric"])
            self.virtenvLabel.setText(
                self.tr("Yes") if self.__info["virtualenv"] else self.tr("No"))
            if self.__info["pip"]:
                self.pipLabel.setText(self.tr(
                    "'eric-ide' was installed from PyPI using the pip"
                    " command."))
            else:
                self.pipLabel.hide()
            if self.__info["guessed"]:
                self.guessLabel.setText(self.tr(
                    "The information shown in this dialog was guessed at"
                    " the first start of eric."))
            else:
                self.guessLabel.hide()
            self.remarksEdit.setPlainText(self.__info["remarks"])
        except EnvironmentError as err:
            E5MessageBox.critical(
                self,
                self.tr("Load Install Information"),
                self.tr("<p>The file containing the install information could"
                        " not be read.</p><p>Reason: {0}</p>""")
                .format(str(err))
            )
            self.__loaded = False
            self.__info = {}
    
    def wasLoaded(self):
        """
        Public method to check, if the install data was loaded.
        
        @return flag indicating the data was loaded
        @rtype bool
        """
        return self.__loaded
    
    @pyqtSlot(bool)
    def on_editButton_toggled(self, checked):
        """
        Private slot to switch the dialog into edit mode.
        
        @param checked flag giving the button check state
        @type bool
        """
        self.interpreteEdit.setReadOnly(not checked)
        self.commandEdit.setReadOnly(not checked)
        self.installPathEdit.setReadOnly(not checked)
        self.remarksEdit.setReadOnly(not checked)
        
        if checked:
            self.__edited = True
    
    @pyqtSlot()
    def on_saveButton_clicked(self):
        """
        Private slot handling the save button press.
        """
        if self.__edited:
            self.__saveData()
    
    @pyqtSlot()
    def reject(self):
        """
        Private slot handling the closing of the dialog.
        """
        if self.__edited:
            yes = E5MessageBox.yesNo(
                self,
                self.tr("Install Information"),
                self.tr("""The install information was edited. Unsaved"""
                        """ changes will be lost. Save first?"""),
                yesDefault=True)
            if yes:
                self.__saveData()
        
        super(InstallInfoDialog, self).reject()
    
    def __saveData(self):
        """
        Private method to save the data.
        """
        self.__info["exe"] = self.interpreteEdit.text()
        self.__info["argv"] = self.commandEdit.text()
        self.__info["eric"] = self.installPathEdit.text()
        self.__info["remarks"] = self.remarksEdit.toPlainText()
        self.__info["edited"] = True
        
        infoFileName = Globals.getInstallInfoFilePath()
        try:
            with open(infoFileName, "w") as infoFile:
               json.dump(self.__info, infoFile, indent=2)
            self.__edited = False
            self.editButton.setChecked(False)
        except EnvironmentError as err:
            E5MessageBox.critical(
                self,
                self.tr("Save Install Information"),
                self.tr("<p>The file containing the install information could"
                        " not be written.</p><p>Reason: {0}</p>""")
                .format(str(err))
            )