Plugins/VcsPlugins/vcsPySvn/SvnBlameDialog.py

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

# Copyright (c) 2003 - 2014 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog to show the output of the svn blame command.
"""

import os

import pysvn

from PyQt4.QtCore import QMutexLocker, Qt
from PyQt4.QtGui import QHeaderView, QDialog, QDialogButtonBox, QTreeWidgetItem

from .SvnDialogMixin import SvnDialogMixin
from .Ui_SvnBlameDialog import Ui_SvnBlameDialog

import Preferences


class SvnBlameDialog(QDialog, SvnDialogMixin, Ui_SvnBlameDialog):
    """
    Class implementing a dialog to show the output of the svn blame command.
    """
    def __init__(self, vcs, parent=None):
        """
        Constructor
        
        @param vcs reference to the vcs object
        @param parent parent widget (QWidget)
        """
        super().__init__(parent)
        self.setupUi(self)
        SvnDialogMixin.__init__(self)
        
        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True)
        
        self.vcs = vcs
        
        self.blameList.headerItem().setText(self.blameList.columnCount(), "")
        font = Preferences.getEditorOtherFonts("MonospacedFont")
        self.blameList.setFont(font)
        
        self.client = self.vcs.getClient()
        self.client.callback_cancel = \
            self._clientCancelCallback
        self.client.callback_get_login = \
            self._clientLoginCallback
        self.client.callback_ssl_server_trust_prompt = \
            self._clientSslServerTrustPromptCallback
        
    def start(self, fn):
        """
        Public slot to start the svn status command.
        
        @param fn filename to show the log for (string)
        """
        self.errorGroup.hide()
        self.activateWindow()
        
        dname, fname = self.vcs.splitPath(fn)
        
        locker = QMutexLocker(self.vcs.vcsExecutionMutex)
        cwd = os.getcwd()
        os.chdir(dname)
        try:
            annotations = self.client.annotate(fname)
            locker.unlock()
            for annotation in annotations:
                self.__generateItem(
                    annotation["revision"].number, annotation["author"],
                    annotation["number"] + 1, annotation["line"])
        except pysvn.ClientError as e:
            locker.unlock()
            self.__showError(e.args[0] + '\n')
        self.__finish()
        os.chdir(cwd)
        
    def __finish(self):
        """
        Private slot called when the process finished or the user pressed the
        button.
        """
        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(True)
        self.buttonBox.button(QDialogButtonBox.Cancel).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.Close).setDefault(True)
        
        self.__resizeColumns()
        
        self._cancel()
        
    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.__finish()
        
    def __resizeColumns(self):
        """
        Private method to resize the list columns.
        """
        self.blameList.header().resizeSections(QHeaderView.ResizeToContents)
        
    def __generateItem(self, revision, author, lineno, text):
        """
        Private method to generate a blame item in the blame list.
        
        @param revision revision string (string)
        @param author author of the change (string)
        @param lineno linenumber (string)
        @param text line of text from the annotated file (string)
        """
        itm = QTreeWidgetItem(
            self.blameList,
            ["{0:d}".format(revision), author, "{0:d}".format(lineno), text])
        itm.setTextAlignment(0, Qt.AlignRight)
        itm.setTextAlignment(2, Qt.AlignRight)
        
    def __showError(self, msg):
        """
        Private slot to show an error message.
        
        @param msg error message to show (string)
        """
        self.errorGroup.show()
        self.errors.insertPlainText(msg)
        self.errors.ensureCursorVisible()