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viewer.py
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viewer.py
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from __future__ import division, unicode_literals
import imp
import os
import platform
import subprocess
import sys
try:
import tdparser
except ImportError:
sys.stderr.write("tdparser is required by 'file_archive view'\n")
sys.exit(3)
from file_archive import hash_metadata
from file_archive.compat import int_types
from file_archive.parser import parse_expression
from file_archive.trans import _, _n
def get_qt():
qtapi = os.environ.get('QT_API', 'pyqt')
# Try PyQt4
if qtapi == 'pyqt' or qtapi == 'pyqt4':
try:
PyQt4 = __import__('PyQt4')
imp.find_module('QtCore', PyQt4.__path__)
imp.find_module('QtGui', PyQt4.__path__)
import sip
except ImportError:
pass
else:
api2_classes = [
'QData', 'QDateTime', 'QString', 'QTextStream',
'QTime', 'QUrl', 'QVariant'
]
for cl in api2_classes:
try:
sip.setapi(cl, 2)
except ValueError:
pass
import PyQt4.QtCore
import PyQt4.QtGui
os.environ['QT_API'] = 'pyqt'
return PyQt4, qtapi
# Try PyQt5
if qtapi == 'pyqt5':
try:
PyQt5 = __import__('PyQt5')
imp.find_module('QtCore', PyQt5.__path__)
imp.find_module('QtGui', PyQt5.__path__)
except ImportError:
pass
else:
import PyQt5.QtCore
import PyQt5.QtGui
import PyQt5.QtWidgets
os.environ['QT_API'] = 'pyqt5'
return PyQt5, qtapi
# Oh no
sys.stderr.write("'file_archive view' requires either PyQt4 or PyQt5\n")
if 'QT_API' in os.environ:
sys.stderr.write("QT_API is currently set to '%s', which is not "
"supported\n" % qtapi)
sys.exit(3)
PyQt, qtapi = get_qt()
QtCore = PyQt.QtCore
QtGui = PyQt.QtGui
QtWidgets = PyQt.QtWidgets if qtapi == 'pyqt5' else PyQt.QtGui
system = platform.system().lower()
if system == 'windows':
def openfile(filename):
subprocess.call(['cmd', '/c', 'start', filename])
elif system == 'darwin':
def openfile(filename):
subprocess.call(['open', filename])
elif system.startswith('linux'):
def openfile(filename):
subprocess.call(['xdg-open', filename])
else:
openfile = None
__all__ = ['StoreViewerWindow', 'run_viewer']
class SearchError(Exception):
"""Error while querying the file store.
"""
class FileItem(QtWidgets.QTreeWidgetItem):
def __init__(self, entry):
self.entry = entry
QtWidgets.QTreeWidgetItem.__init__(self, [entry.objectid])
class MetadataItem(FileItem):
def __init__(self, entry, key, value):
if isinstance(value, int_types):
t = 'int'
value = '%d' % value
else: # isinstance(v, string_types):
t = 'str'
QtWidgets.QTreeWidgetItem.__init__(self, [key, value, t])
self.entry = entry
class StoreViewerWindow(QtWidgets.QMainWindow):
WINDOW_TITLE = _("file_archive viewer")
MAX_RESULTS = 100
def __init__(self, store):
QtWidgets.QMainWindow.__init__(self)
self.setWindowTitle(self.WINDOW_TITLE)
self.store = store
searchbar = QtWidgets.QHBoxLayout()
self._needs_refresh = False
# Input line for the query
self._input = QtWidgets.QLineEdit()
self._input.setPlaceholderText(_("Enter query here"))
self._input.returnPressed.connect(self._search)
self._input.textEdited.connect(lambda t: self._set_needs_refresh())
searchbar.addWidget(self._input)
# Search button
self._searchbutton = QtWidgets.QPushButton(_("Search"))
self._searchbutton.clicked.connect(self._search)
searchbar.addWidget(self._searchbutton)
results = QtWidgets.QHBoxLayout()
# Result view, as a tree with metadata
self._result_tree = QtWidgets.QTreeWidget()
self._result_tree.setColumnCount(3)
self._result_tree.setHeaderLabels([_("Key"), _("Value"), _("Type")])
self._result_tree.itemSelectionChanged.connect(self._selection_changed)
results.addWidget(self._result_tree)
# Buttons, enabled/disabled when the selection changes
buttons = QtWidgets.QVBoxLayout()
self._buttons = self._create_buttons()
for _name, button in self._buttons:
buttons.addWidget(button)
self._selection_changed()
results.addLayout(buttons)
layout = QtWidgets.QVBoxLayout()
layout.addLayout(searchbar)
layout.addLayout(results)
widget = QtWidgets.QWidget()
widget.setLayout(layout)
self.setCentralWidget(widget)
self._search()
def _create_buttons(self):
buttons = []
# Open button; uses the system to choose the program to open with
# (on Windows, might ask you what to use every time because of filename
# scheme)
open_button = QtWidgets.QPushButton(_("Open"))
if openfile is not None:
open_button.clicked.connect(self._openfile)
buttons.append(('single', open_button))
else:
open_button.setEnabled(False)
# Copy hash button
copy_button = QtWidgets.QPushButton(_("Copy ID"))
copy_button.clicked.connect(self._copy_objectid)
buttons.append(('single', copy_button))
# Edit metadata button
edit_button = QtWidgets.QPushButton(_("Edit metadata..."))
edit_button.clicked.connect(self._edit_metadata)
buttons.append(('single', edit_button))
# Delete button, removes what's selected (with confirmation)
remove_button = QtWidgets.QPushButton(_("Delete"))
remove_button.clicked.connect(self._delete)
buttons.append(('multi', remove_button))
return buttons
def _set_needs_refresh(self, needs=True):
if needs == self._needs_refresh:
return
if needs:
self._searchbutton.setStyleSheet('font-weight: bold;')
else:
self._searchbutton.setStyleSheet('')
self._needs_refresh = needs
def _alter_search_conditions(self, conditions):
return conditions
def _search(self):
error = None
query = self._input.text()
if len(query.split()) == 1 and all(o not in query.strip()
for o in '=<>'):
objectid = query.strip()
try:
entries = [self.store.get(objectid)]
except KeyError:
error = _("objectid '{oid}' not found", oid=objectid)
else:
try:
conditions = parse_expression(query)
except tdparser.Error as e:
error = e.args[0]
else:
conditions = self._alter_search_conditions(conditions)
entries = self.store.query(conditions, limit=self.MAX_RESULTS)
self._result_tree.clear()
if error is not None:
w = QtWidgets.QTreeWidgetItem([error])
w.setForeground(0, QtGui.QColor(255, 0, 0))
self._result_tree.addTopLevelItem(w)
self._result_tree.setFirstItemColumnSpanned(w, True)
else:
for i, entry in enumerate(entries):
file_item = FileItem(entry)
f = file_item.font(0)
f.setBold(True)
file_item.setFont(0, f)
self._result_tree.addTopLevelItem(file_item)
self._result_tree.setFirstItemColumnSpanned(file_item, True)
for k, v in entry.metadata.items():
file_item.addChild(MetadataItem(entry, k, v))
if i + 1 == self.MAX_RESULTS:
last_item = QtWidgets.QTreeWidgetItem(
[_("... stripped after {nb} results...",
nb=self.MAX_RESULTS)])
f = last_item.font(0)
f.setBold(True)
f.setItalic(True)
last_item.setFont(0, f)
self._result_tree.addTopLevelItem(last_item)
self._result_tree.setFirstItemColumnSpanned(last_item,
True)
break
if self._result_tree.topLevelItemCount() == 0:
w = QtWidgets.QTreeWidgetItem([_("No matches")])
self._result_tree.addTopLevelItem(w)
self._result_tree.setFirstItemColumnSpanned(w, True)
self._result_tree.expandAll()
self._set_needs_refresh(False)
def _selection_changed(self):
items = self._result_tree.selectedItems()
for t, button in self._buttons:
if t == 'single':
button.setEnabled(len(items) == 1 and
isinstance(items[0], FileItem))
elif t == 'multi':
button.setEnabled(bool(items) and
all(isinstance(i, FileItem) for i in items))
def _openfile(self):
item = self._result_tree.currentItem()
if item is not None:
openfile(item.entry.filename)
def _copy_objectid(self):
items = self._result_tree.selectedItems()
if not items:
return
objectid = items[0].entry.objectid
clipboard = QtWidgets.QApplication.clipboard()
clipboard.setText(objectid)
def _edit_metadata(self):
items = self._result_tree.selectedItems()
if not items:
return
entry = items[0].entry
editor = MetadataEditor(entry, self)
editor.show()
def change_metadata(self, old_objectid, metadata, remove_original=False):
new_objectid = hash_metadata(metadata)
if new_objectid == old_objectid:
return
self.store.metadata.add(new_objectid, metadata)
if remove_original:
self.store.remove(old_objectid)
self._search()
def _delete(self):
items = self._result_tree.selectedItems()
if not items:
return
confirm = QtWidgets.QMessageBox.question(
self,
_("Are you sure?"),
_n("You are about to delete {num} entry from the store. "
"Please confirm.",
"You are about to delete {num} entries from the store. "
"Please confirm.",
len(items),
num=len(items)),
QtWidgets.QMessageBox.Ok | QtWidgets.QMessageBox.Cancel,
QtWidgets.QMessageBox.Cancel)
if confirm == QtWidgets.QMessageBox.Ok:
ids = set([i.entry.objectid for i in items])
i = 0
while i < self._result_tree.topLevelItemCount():
oid = self._result_tree.topLevelItem(i).entry.objectid
if oid in ids:
self.store.remove(oid)
self._result_tree.takeTopLevelItem(i)
else:
i += 1
class MetadataEditor(QtWidgets.QDialog):
def __init__(self, entry, parent):
QtWidgets.QDialog.__init__(self, parent, QtCore.Qt.Dialog)
self.setWindowModality(QtCore.Qt.ApplicationModal)
self._entry = entry
self._parent = parent
label = QtWidgets.QLabel(_("Editing entry %s") % entry.objectid)
self._table = QtWidgets.QTableWidget()
self._table.setColumnCount(3)
self._table.setHorizontalHeaderLabels(['key', 'type', 'value'])
self._table.setSortingEnabled(True)
self._table.sortByColumn(0, QtCore.Qt.AscendingOrder)
self._table.resizeColumnsToContents()
scrollarea = QtWidgets.QScrollArea()
scrollarea.setWidgetResizable(True)
scrollarea.setWidget(self._table)
plus = QtWidgets.QPushButton(_("+"))
plus.clicked.connect(self._add_row)
minus = QtWidgets.QPushButton(_("-"))
minus.clicked.connect(self._remove_row)
controls = QtWidgets.QVBoxLayout()
controls.addWidget(plus)
controls.addWidget(minus)
table_row = QtWidgets.QHBoxLayout()
table_row.addWidget(scrollarea)
table_row.addLayout(controls)
self._remove_original = QtWidgets.QCheckBox(_("Remove original entry"))
self._remove_original.setChecked(False)
self._remove_original.stateChanged.connect(self._mode_changed)
self._ok_button = QtWidgets.QPushButton(_("Create new entry"))
self._ok_button.clicked.connect(self._ok_clicked)
cancel_button = QtWidgets.QPushButton(_("Cancel"))
cancel_button.clicked.connect(lambda: self.setVisible(False))
buttons = QtWidgets.QHBoxLayout()
buttons.addStretch()
buttons.addWidget(self._ok_button)
buttons.addWidget(cancel_button)
layout = QtWidgets.QVBoxLayout()
layout.addWidget(label)
layout.addLayout(table_row)
layout.addWidget(self._remove_original)
layout.addLayout(buttons)
self.setLayout(layout)
self._table.setSortingEnabled(False)
for k, v in self._entry.metadata.items():
if k == 'hash':
continue
self._add_row(k, v, sorting_disabled=True)
self._table.setSortingEnabled(True)
def _add_row(self, key=None, value=None, sorting_disabled=False):
row = self._table.rowCount()
if not sorting_disabled:
self._table.setSortingEnabled(False)
self._table.insertRow(row)
typeedit = QtWidgets.QComboBox()
typeedit.addItems(['int', 'str'])
self._table.setCellWidget(row, 1, typeedit)
if key is not None:
keyitem = QtWidgets.QTableWidgetItem(key)
self._table.setItem(row, 0, keyitem)
if value is not None:
if isinstance(value, int_types):
typeedit.setCurrentIndex(0)
value = '%s' % value
else:
typeedit.setCurrentIndex(1)
valueitem = QtWidgets.QTableWidgetItem(value)
self._table.setItem(row, 2, valueitem)
if not sorting_disabled:
self._table.setSortingEnabled(True)
def _remove_row(self):
row = self._table.currentRow()
self._table.removeRow(row)
def _mode_changed(self, remove_original):
if remove_original:
self._ok_button.setText(_("Replace entry"))
else:
self._ok_button.setText(_("Create new entry"))
def _ok_clicked(self):
error = None
metadata = {}
for row in range(self._table.rowCount()):
key = self._table.item(row, 0).text()
type_ = self._table.cellWidget(row, 1).currentText()
value = self._table.item(row, 2).text()
if not key:
error = _("Empty key")
if type_ == 'int':
try:
value = int(value)
except ValueError:
error = (_("Invalid int value for %(key)s (row %(row)d)") %
{'key': key, 'row': row + 1})
elif type_ != 'str':
error = _("Invalid type (row %d)") % (row + 1)
if key in metadata:
error = _("Duplicate key %s" % key)
if error is not None:
break
metadata[key] = {'type': type_, 'value': value}
if error is not None:
QtWidgets.QMessageBox.critical(self, _("Invalid values"), error)
return
metadata['hash'] = self._entry.metadata['hash']
self._parent.change_metadata(self._entry.objectid, metadata,
self._remove_original.isChecked())
self.setVisible(False)
def run_viewer(store):
application = QtWidgets.QApplication([])
window = StoreViewerWindow(store)
window.show()
application.exec_()
sys.exit(0)