Plugins/VcsPlugins/vcsGit/GitDialog.py

changeset 6020
baf6da1ae288
child 6048
82ad8ec9548c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Plugins/VcsPlugins/vcsGit/GitDialog.py	Sun Dec 10 17:42:11 2017 +0100
@@ -0,0 +1,311 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2014 - 2017 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a dialog starting a process and showing its output.
+"""
+
+from __future__ import unicode_literals
+try:
+    str = unicode
+except NameError:
+    pass
+
+import os
+
+from PyQt5.QtCore import QProcess, QTimer, pyqtSlot, Qt, QCoreApplication, \
+    QProcessEnvironment
+from PyQt5.QtWidgets import QDialog, QDialogButtonBox, QLineEdit
+
+from E5Gui import E5MessageBox
+
+from .Ui_GitDialog import Ui_GitDialog
+
+from .GitUtilities import strToQByteArray
+
+import Preferences
+
+
+class GitDialog(QDialog, Ui_GitDialog):
+    """
+    Class implementing a dialog starting a process and showing its output.
+    
+    It starts a QProcess and displays a dialog that
+    shows the output of the process. The dialog is modal,
+    which causes a synchronized execution of the process.
+    """
+    def __init__(self, text, git=None, parent=None):
+        """
+        Constructor
+        
+        @param text text to be shown by the label (string)
+        @param git reference to the Git interface object (Git)
+        @param parent parent widget (QWidget)
+        """
+        super(GitDialog, self).__init__(parent)
+        self.setupUi(self)
+        
+        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(False)
+        self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True)
+        
+        self.process = None
+        self.username = ''
+        self.password = ''
+        self.vcs = git
+        
+        self.outputGroup.setTitle(text)
+        
+        self.show()
+        QCoreApplication.processEvents()
+    
+    def __finish(self):
+        """
+        Private slot called when the process finished or the user pressed
+        the button.
+        """
+        if self.process is not None and \
+           self.process.state() != QProcess.NotRunning:
+            self.process.terminate()
+            QTimer.singleShot(2000, self.process.kill)
+            self.process.waitForFinished(3000)
+        
+        self.inputGroup.setEnabled(False)
+        self.inputGroup.hide()
+        
+        self.process = None
+        
+        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(True)
+        self.buttonBox.button(QDialogButtonBox.Cancel).setEnabled(False)
+        self.buttonBox.button(QDialogButtonBox.Close).setDefault(True)
+        self.buttonBox.button(QDialogButtonBox.Close).setFocus(
+            Qt.OtherFocusReason)
+        
+        if self.normal and self.errors.toPlainText():
+            self.errorGroup.setTitle(self.tr("Additional Output"))
+        
+        if Preferences.getVCS("AutoClose") and \
+           self.normal and \
+           self.errors.toPlainText() == "":
+            self.accept()
+    
+    def on_buttonBox_clicked(self, button):
+        """
+        Private slot called by a button of the button box clicked.
+        
+        @param button button that was clicked (QAbstractButton)
+        """
+        if button == self.buttonBox.button(QDialogButtonBox.Close):
+            self.close()
+        elif button == self.buttonBox.button(QDialogButtonBox.Cancel):
+            self.statusLabel.setText(self.tr("Process canceled."))
+            self.__finish()
+    
+    def __procFinished(self, exitCode, exitStatus):
+        """
+        Private slot connected to the finished signal.
+        
+        @param exitCode exit code of the process (integer)
+        @param exitStatus exit status of the process (QProcess.ExitStatus)
+        """
+        self.normal = (exitStatus == QProcess.NormalExit) and (exitCode == 0)
+        if self.normal:
+            self.statusLabel.setText(self.tr("Process finished successfully."))
+        elif exitStatus == QProcess.CrashExit:
+            self.statusLabel.setText(self.tr("Process crashed."))
+        else:
+            self.statusLabel.setText(
+                self.tr("Proces finished with exit code {0}").format(exitCode))
+        self.__finish()
+    
+    def startProcess(self, args, workingDir=None, showArgs=True,
+                     environment=None):
+        """
+        Public slot used to start the process.
+        
+        @param args list of arguments for the process (list of strings)
+        @keyparam workingDir working directory for the process (string)
+        @keyparam showArgs flag indicating to show the arguments (boolean)
+        @keyparam environment dictionary of environment settings to add
+            or change for the git process (dict of string and string)
+        @return flag indicating a successful start of the process (boolean)
+        """
+        self.errorGroup.hide()
+        self.normal = False
+        self.intercept = False
+        
+        if environment is None:
+            environment = {}
+        
+        self.__hasAddOrDelete = False
+        if args[0] in ["checkout", "fetch", "pull", "rebase", "reset",
+                       "merge", "cherry-pick", "stash"]:
+            self.__updateCommand = True
+        else:
+            self.__updateCommand = False
+        
+        if showArgs:
+            self.resultbox.append(' '.join(args))
+            self.resultbox.append('')
+        
+        self.process = QProcess()
+        if environment:
+            env = QProcessEnvironment.systemEnvironment()
+            for key, value in environment.items():
+                env.insert(key, value)
+            self.process.setProcessEnvironment(env)
+        
+        self.process.finished.connect(self.__procFinished)
+        self.process.readyReadStandardOutput.connect(self.__readStdout)
+        self.process.readyReadStandardError.connect(self.__readStderr)
+        
+        if workingDir:
+            self.process.setWorkingDirectory(workingDir)
+        self.process.start('git', args)
+        procStarted = self.process.waitForStarted(5000)
+        if not procStarted:
+            self.buttonBox.setFocus()
+            self.inputGroup.setEnabled(False)
+            E5MessageBox.critical(
+                self,
+                self.tr('Process Generation Error'),
+                self.tr(
+                    'The process {0} could not be started. '
+                    'Ensure, that it is in the search path.'
+                ).format('git'))
+        else:
+            self.inputGroup.setEnabled(True)
+            self.inputGroup.show()
+        return procStarted
+    
+    def normalExit(self):
+        """
+        Public method to check for a normal process termination.
+        
+        @return flag indicating normal process termination (boolean)
+        """
+        return self.normal
+    
+    def normalExitWithoutErrors(self):
+        """
+        Public method to check for a normal process termination without
+        error messages.
+        
+        @return flag indicating normal process termination (boolean)
+        """
+        return self.normal and self.errors.toPlainText() == ""
+    
+    def __readStdout(self):
+        """
+        Private slot to handle the readyReadStandardOutput signal.
+        
+        It reads the output of the process, formats it and inserts it into
+        the contents pane.
+        """
+        if self.process is not None:
+            s = str(self.process.readAllStandardOutput(),
+                    Preferences.getSystem("IOEncoding"),
+                    'replace')
+            self.__showOutput(s)
+    
+    def __showOutput(self, out):
+        """
+        Private slot to show some output.
+        
+        @param out output to be shown (string)
+        """
+        self.resultbox.insertPlainText(out)
+        self.resultbox.ensureCursorVisible()
+        
+        # check for a changed project file
+        if self.__updateCommand:
+            for line in out.splitlines():
+                if '.e4p' in line or '.e6p' in line:
+                    self.__hasAddOrDelete = True
+                    break
+        
+        QCoreApplication.processEvents()
+    
+    def __readStderr(self):
+        """
+        Private slot to handle the readyReadStandardError signal.
+        
+        It reads the error output of the process and inserts it into the
+        error pane.
+        """
+        if self.process is not None:
+            s = str(self.process.readAllStandardError(),
+                    Preferences.getSystem("IOEncoding"),
+                    'replace')
+            self.__showError(s)
+    
+    def __showError(self, out):
+        """
+        Private slot to show some error.
+        
+        @param out error to be shown (string)
+        """
+        self.errorGroup.show()
+        self.errors.insertPlainText(out)
+        self.errors.ensureCursorVisible()
+        
+        QCoreApplication.processEvents()
+    
+    def on_passwordCheckBox_toggled(self, isOn):
+        """
+        Private slot to handle the password checkbox toggled.
+        
+        @param isOn flag indicating the status of the check box (boolean)
+        """
+        if isOn:
+            self.input.setEchoMode(QLineEdit.Password)
+        else:
+            self.input.setEchoMode(QLineEdit.Normal)
+    
+    @pyqtSlot()
+    def on_sendButton_clicked(self):
+        """
+        Private slot to send the input to the git process.
+        """
+        inputTxt = self.input.text()
+        inputTxt += os.linesep
+        
+        if self.passwordCheckBox.isChecked():
+            self.errors.insertPlainText(os.linesep)
+            self.errors.ensureCursorVisible()
+        else:
+            self.errors.insertPlainText(inputTxt)
+            self.errors.ensureCursorVisible()
+        
+        self.process.write(strToQByteArray(inputTxt))
+        
+        self.passwordCheckBox.setChecked(False)
+        self.input.clear()
+    
+    def on_input_returnPressed(self):
+        """
+        Private slot to handle the press of the return key in the input field.
+        """
+        self.intercept = True
+        self.on_sendButton_clicked()
+    
+    def keyPressEvent(self, evt):
+        """
+        Protected slot to handle a key press event.
+        
+        @param evt the key press event (QKeyEvent)
+        """
+        if self.intercept:
+            self.intercept = False
+            evt.accept()
+            return
+        super(GitDialog, self).keyPressEvent(evt)
+    
+    def hasAddOrDelete(self):
+        """
+        Public method to check, if the last action contained an add or delete.
+        
+        @return flag indicating the presence of an add or delete (boolean)
+        """
+        return self.__hasAddOrDelete

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