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src/calibre/gui2/metadata/basic_widgets.py

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+#!/usr/bin/env python
+# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
+
+__license__   = 'GPL v3'
+__copyright__ = '2011, Kovid Goyal <kovid@kovidgoyal.net>'
+__docformat__ = 'restructuredtext en'
+
+import textwrap, re, os
+
+from PyQt4.Qt import Qt, \
+    QIcon, QToolButton, QWidget, QLabel, QGridLayout, \
+    QDoubleSpinBox, QListWidgetItem, QSize, QPixmap, \
+    QPushButton, QSpinBox, \
+    QMessageBox, QLineEdit
+
+from calibre.gui2.widgets import EnLineEdit, CompleteComboBox, \
+        EnComboBox, FormatList, ImageView, CompleteLineEdit
+from calibre.utils.icu import sort_key
+from calibre.utils.config import tweaks
+from calibre.ebooks.metadata import title_sort, authors_to_string, \
+        string_to_authors, check_isbn
+from calibre.gui2 import file_icon_provider, \
+        choose_files, error_dialog, choose_images, question_dialog
+from calibre.utils.date import local_tz
+from calibre import strftime
+from calibre.ebooks import BOOK_EXTENSIONS
+from calibre.customize.ui import run_plugins_on_import
+from calibre.utils.date import utcfromtimestamp
+from calibre.gui2.comments_editor import Editor
+from calibre.library.comments import comments_to_html
+from calibre.gui2.dialogs.tag_editor import TagEditor
+
+'''
+The interface common to all widgets used to set basic metadata
+class BasicMetadataWidget(object):
+
+    LABEL = "label text"
+
+    def initialize(self, db, id_):
+        pass
+
+    def commit(self, db, id_):
+        return True
+
+    @dynamic_property
+    def current_val(self):
+        # Present in most but not all basic metadata widgets
+        def fget(self):
+            return None
+        def fset(self, val):
+            pass
+        return property(fget=fget, fset=fset)
+'''
+
+# Title {{{
+class TitleEdit(EnLineEdit):
+
+    TITLE_ATTR = 'title'
+    COMMIT = True
+    TOOLTIP = _('Change the title of this book')
+    LABEL = _('&Title:')
+
+    def __init__(self, parent):
+        self.dialog = parent
+        EnLineEdit.__init__(self, parent)
+        self.setToolTip(self.TOOLTIP)
+        self.setWhatsThis(self.TOOLTIP)
+
+    def get_default(self):
+        return _('Unknown')
+
+    def initialize(self, db, id_):
+        title = getattr(db, self.TITLE_ATTR)(id_, index_is_id=True)
+        self.current_val = title
+        self.original_val = self.current_val
+
+    def commit(self, db, id_):
+        title = self.current_val
+        if self.COMMIT:
+            getattr(db, 'set_', self.TITLE_ATTR)(id_, title, notify=False)
+        else:
+            getattr(db, 'set_', self.TITLE_ATTR)(id_, title, notify=False,
+                    commit=False)
+        return True
+
+    @dynamic_property
+    def current_val(self):
+
+        def fget(self):
+            title = unicode(self.text()).strip()
+            if not title:
+                title = self.get_default()
+            return title
+
+        def fset(self, val):
+            if hasattr(val, 'strip'):
+                val = val.strip()
+            if not val:
+                val = self.get_default()
+            self.setText(val)
+            self.setCursorPosition(0)
+
+        return property(fget=fget, fset=fset)
+
+class TitleSortEdit(TitleEdit):
+
+    TITLE_ATTR = 'title_sort'
+    COMMIT = False
+    TOOLTIP = _('Specify how this book should be sorted when by title.'
+            ' For example, The Exorcist might be sorted as Exorcist, The.')
+    LABEL = _('Title &sort:')
+
+    def __init__(self, parent, title_edit, autogen_button):
+        TitleEdit.__init__(self, parent)
+        self.title_edit = title_edit
+
+        base = self.TOOLTIP
+        ok_tooltip = '<p>' + textwrap.fill(base+'<br><br>'+
+                            _(' The green color indicates that the current '
+                              'title sort matches the current title'))
+        bad_tooltip = '<p>'+textwrap.fill(base + '<br><br>'+
+                _(' The red color warns that the current '
+                  'title sort does not match the current title. '
+                  'No action is required if this is what you want.'))
+        self.tooltips = (ok_tooltip, bad_tooltip)
+
+        self.title_edit.textChanged.connect(self.update_state)
+        self.textChanged.connect(self.update_state)
+
+        autogen_button.clicked.connect(self.auto_generate)
+        self.update_state()
+
+    def update_state(self, *args):
+        ts = title_sort(self.title_edit.current_val)
+        normal = ts == self.current_val
+        if normal:
+            col = 'rgb(0, 255, 0, 20%)'
+        else:
+            col = 'rgb(255, 0, 0, 20%)'
+        self.setStyleSheet('QLineEdit { color: black; '
+                              'background-color: %s; }'%col)
+        tt = self.tooltips[0 if normal else 1]
+        self.setToolTip(tt)
+        self.setWhatsThis(tt)
+
+    def auto_generate(self, *args):
+        self.current_val = title_sort(self.title_edit.current_val)
+
+# }}}
+
+# Authors {{{
+class AuthorsEdit(CompleteComboBox):
+
+    TOOLTIP = ''
+    LABEL = _('&Author(s):')
+
+    def __init__(self, parent):
+        self.dialog = parent
+        CompleteComboBox.__init__(self, parent)
+        self.setToolTip(self.TOOLTIP)
+        self.setWhatsThis(self.TOOLTIP)
+        self.setEditable(True)
+        self.setSizeAdjustPolicy(self.AdjustToMinimumContentsLengthWithIcon)
+
+    def get_default(self):
+        return _('Unknown')
+
+    def initialize(self, db, id_):
+        all_authors = db.all_authors()
+        all_authors.sort(key=lambda x : sort_key(x[1]))
+        for i in all_authors:
+            id, name = i
+            name = [name.strip().replace('|', ',') for n in name.split(',')]
+            self.addItem(authors_to_string(name))
+
+        self.set_separator('&')
+        self.set_space_before_sep(True)
+        self.update_items_cache(db.all_author_names())
+
+        au = db.authors(id_, index_is_id=True)
+        if not au:
+            au = _('Unknown')
+        self.current_val = [a.strip().replace('|', ',') for a in au.split(',')]
+        self.original_val = self.current_val
+
+    def commit(self, db, id_):
+        authors = self.current_val
+        db.set_authors(id_, authors, notify=False)
+        return True
+
+    @dynamic_property
+    def current_val(self):
+
+        def fget(self):
+            au = unicode(self.text()).strip()
+            if not au:
+                au = self.get_default()
+            return string_to_authors(au)
+
+        def fset(self, val):
+            if not val:
+                val = [self.get_default()]
+            self.setEditText(' & '.join([x.strip() for x in val]))
+            self.lineEdit().setCursorPosition(0)
+
+
+        return property(fget=fget, fset=fset)
+
+class AuthorSortEdit(EnLineEdit):
+
+    TOOLTIP = _('Specify how the author(s) of this book should be sorted. '
+            'For example Charles Dickens should be sorted as Dickens, '
+            'Charles.\nIf the box is colored green, then text matches '
+            'the individual author\'s sort strings. If it is colored '
+            'red, then the authors and this text do not match.')
+    LABEL = _('Author s&ort:')
+
+    def __init__(self, parent, authors_edit, autogen_button, db):
+        EnLineEdit.__init__(self, parent)
+        self.authors_edit = authors_edit
+        self.db = db
+
+        base = self.TOOLTIP
+        ok_tooltip = '<p>' + textwrap.fill(base+'<br><br>'+
+                _(' The green color indicates that the current '
+                    'author sort matches the current author'))
+        bad_tooltip = '<p>'+textwrap.fill(base + '<br><br>'+
+                _(' The red color indicates that the current '
+                    'author sort does not match the current author. '
+                    'No action is required if this is what you want.'))
+        self.tooltips = (ok_tooltip, bad_tooltip)
+
+        self.authors_edit.editTextChanged.connect(self.update_state)
+        self.textChanged.connect(self.update_state)
+
+        autogen_button.clicked.connect(self.auto_generate)
+        self.update_state()
+
+    @dynamic_property
+    def current_val(self):
+
+        def fget(self):
+            return unicode(self.text()).strip()
+
+        def fset(self, val):
+            if not val:
+                val = ''
+            self.setText(val.strip())
+            self.setCursorPosition(0)
+
+        return property(fget=fget, fset=fset)
+
+    def update_state(self, *args):
+        au = unicode(self.authors_edit.text())
+        au = re.sub(r'\s+et al\.$', '', au)
+        au = self.db.author_sort_from_authors(string_to_authors(au))
+
+        normal = au == self.current_val
+        if normal:
+            col = 'rgb(0, 255, 0, 20%)'
+        else:
+            col = 'rgb(255, 0, 0, 20%)'
+        self.setStyleSheet('QLineEdit { color: black; '
+                              'background-color: %s; }'%col)
+        tt = self.tooltips[0 if normal else 1]
+        self.setToolTip(tt)
+        self.setWhatsThis(tt)
+
+    def auto_generate(self, *args):
+        au = unicode(self.authors_edit.text())
+        au = re.sub(r'\s+et al\.$', '', au)
+        authors = string_to_authors(au)
+        self.current_val = self.db.author_sort_from_authors(authors)
+
+    def initialize(self, db, id_):
+        self.current_val = db.author_sort(id_, index_is_id=True)
+
+    def commit(self, db, id_):
+        aus = self.current_val
+        db.set_author_sort(id_, aus, notify=False, commit=False)
+        return True
+
+# }}}
+
+# Series {{{
+class SeriesEdit(EnComboBox):
+
+    TOOLTIP = _('List of known series. You can add new series.')
+    LABEL = _('&Series:')
+
+    def __init__(self, parent):
+        EnComboBox.__init__(self, parent)
+        self.dialog = parent
+        self.setSizeAdjustPolicy(
+                self.AdjustToMinimumContentsLengthWithIcon)
+        self.setToolTip(self.TOOLTIP)
+        self.setWhatsThis(self.TOOLTIP)
+        self.setEditable(True)
+
+    @dynamic_property
+    def current_val(self):
+
+        def fget(self):
+            return unicode(self.currentText()).strip()
+
+        def fset(self, val):
+            if not val:
+                val = ''
+            self.setEditText(val.strip())
+            self.setCursorPosition(0)
+
+        return property(fget=fget, fset=fset)
+
+    def initialize(self, db, id_):
+        all_series = db.all_series()
+        all_series.sort(key=lambda x : sort_key(x[1]))
+        series_id = db.series_id(id_, index_is_id=True)
+        idx, c = None, 0
+        for i in all_series:
+            id, name = i
+            if id == series_id:
+                idx = c
+            self.addItem(name)
+            c += 1
+
+        self.lineEdit().setText('')
+        if idx is not None:
+            self.setCurrentIndex(idx)
+        self.original_val = self.current_val
+
+    def commit(self, db, id_):
+        series = self.current_val
+        db.set_series(id_, series, notify=False, commit=True)
+        return True
+
+class SeriesIndexEdit(QDoubleSpinBox):
+
+    TOOLTIP = ''
+    LABEL = _('&Number:')
+
+    def __init__(self, parent, series_edit):
+        QDoubleSpinBox.__init__(self, parent)
+        self.dialog = parent
+        self.db = self.original_series_name = None
+        self.setMaximum(1000000)
+        self.series_edit = series_edit
+        series_edit.currentIndexChanged.connect(self.enable)
+        series_edit.editTextChanged.connect(self.enable)
+        series_edit.lineEdit().editingFinished.connect(self.increment)
+        self.enable()
+
+    def enable(self, *args):
+        self.setEnabled(bool(self.series_edit.current_val))
+
+    @dynamic_property
+    def current_val(self):
+
+        def fget(self):
+            return self.value()
+
+        def fset(self, val):
+            if val is None:
+                val = 1.0
+            val = float(val)
+            self.setValue(val)
+
+        return property(fget=fget, fset=fset)
+
+    def initialize(self, db, id_):
+        self.db = db
+        if self.series_edit.current_val:
+            val = db.series_index(id_, index_is_id=True)
+        else:
+            val = 1.0
+        self.current_val = val
+        self.original_val = self.current_val
+        self.original_series_name = self.series_edit.original_val
+
+    def commit(self, db, id_):
+        db.set_series_index(id_, self.current_val, notify=False, commit=False)
+        return True
+
+    def increment(self):
+        if self.db is not None:
+            try:
+                series = self.series_edit.current_val
+                if series and series != self.original_series_name:
+                    ns = 1.0
+                    if tweaks['series_index_auto_increment'] != 'const':
+                        ns = self.db.get_next_series_num_for(series)
+                    self.current_val = ns
+                    self.original_series_name = series
+            except:
+                import traceback
+                traceback.print_exc()
+
+
+# }}}
+
+class BuddyLabel(QLabel): # {{{
+
+    def __init__(self, buddy):
+        QLabel.__init__(self, buddy.LABEL)
+        self.setBuddy(buddy)
+        self.setAlignment(Qt.AlignRight|Qt.AlignVCenter)
+# }}}
+
+class Format(QListWidgetItem): # {{{
+
+    def __init__(self, parent, ext, size, path=None, timestamp=None):
+        self.path = path
+        self.ext = ext
+        self.size = float(size)/(1024*1024)
+        text = '%s (%.2f MB)'%(self.ext.upper(), self.size)
+        QListWidgetItem.__init__(self, file_icon_provider().icon_from_ext(ext),
+                                 text, parent, QListWidgetItem.UserType)
+        if timestamp is not None:
+            ts = timestamp.astimezone(local_tz)
+            t = strftime('%a, %d %b %Y [%H:%M:%S]', ts.timetuple())
+            text = _('Last modified: %s')%t
+            self.setToolTip(text)
+            self.setStatusTip(text)
+
+# }}}
+
+class FormatsManager(QWidget): # {{{
+
+    def __init__(self, parent):
+        QWidget.__init__(self, parent)
+        self.dialog = parent
+        self.changed = False
+
+        self.l = l = QGridLayout()
+        self.setLayout(l)
+        self.cover_from_format_button = QToolButton(self)
+        self.cover_from_format_button.setToolTip(
+                _('Set the cover for the book from the selected format'))
+        self.cover_from_format_button.setIcon(QIcon(I('book.png')))
+        self.cover_from_format_button.setIconSize(QSize(32, 32))
+
+        self.metadata_from_format_button = QToolButton(self)
+        self.metadata_from_format_button.setIcon(QIcon(I('edit_input.png')))
+        self.metadata_from_format_button.setIconSize(QSize(32, 32))
+        # TODO: Implement the *_from_format buttons
+
+        self.add_format_button = QToolButton(self)
+        self.add_format_button.setIcon(QIcon(I('add_book.png')))
+        self.add_format_button.setIconSize(QSize(32, 32))
+        self.add_format_button.clicked.connect(self.add_format)
+
+        self.remove_format_button = QToolButton(self)
+        self.remove_format_button.setIcon(QIcon(I('trash.png')))
+        self.remove_format_button.setIconSize(QSize(32, 32))
+        self.remove_format_button.clicked.connect(self.remove_format)
+
+        self.formats = FormatList(self)
+        self.formats.setAcceptDrops(True)
+        self.formats.formats_dropped.connect(self.formats_dropped)
+        self.formats.delete_format.connect(self.remove_format)
+        self.formats.itemDoubleClicked.connect(self.show_format)
+        self.formats.setDragDropMode(self.formats.DropOnly)
+        self.formats.setIconSize(QSize(32, 32))
+        self.formats.setMaximumWidth(200)
+
+        l.addWidget(self.cover_from_format_button,    0, 0, 1, 1)
+        l.addWidget(self.metadata_from_format_button, 2, 0, 1, 1)
+        l.addWidget(self.add_format_button,           0, 2, 1, 1)
+        l.addWidget(self.remove_format_button,        2, 2, 1, 1)
+        l.addWidget(self.formats,                     0, 1, 3, 1)
+
+
+
+    def initialize(self, db, id_):
+        self.changed = False
+        exts = db.formats(id_, index_is_id=True)
+        if exts:
+            exts = exts.split(',')
+            for ext in exts:
+                if not ext:
+                    ext = ''
+                size = db.sizeof_format(id_, ext, index_is_id=True)
+                timestamp = db.format_last_modified(id_, ext)
+                if size is None:
+                    continue
+                Format(self.formats, ext, size, timestamp=timestamp)
+
+    def commit(self, db, id_):
+        if not self.changed:
+            return True
+        old_extensions, new_extensions, paths = set(), set(), {}
+        for row in range(self.formats.count()):
+            fmt = self.formats.item(row)
+            ext, path = fmt.ext.lower(), fmt.path
+            if 'unknown' in ext.lower():
+                ext = None
+            if path:
+                new_extensions.add(ext)
+                paths[ext] = path
+            else:
+                old_extensions.add(ext)
+        for ext in new_extensions:
+            db.add_format(id_, ext, open(paths[ext], 'rb'), notify=False,
+                    index_is_id=True)
+        db_extensions = set([f.lower() for f in db.formats(id_,
+            index_is_id=True).split(',')])
+        extensions = new_extensions.union(old_extensions)
+        for ext in db_extensions:
+            if ext not in extensions:
+                db.remove_format(id_, ext, notify=False, index_is_id=True)
+
+        self.changed = False
+        return True
+
+    def add_format(self, *args):
+        files = choose_files(self, 'add formats dialog',
+                             _("Choose formats for ") +
+                             self.dialog.title.current_val,
+                             [(_('Books'), BOOK_EXTENSIONS)])
+        self._add_formats(files)
+
+    def _add_formats(self, paths):
+        added = False
+        if not paths:
+            return added
+        bad_perms = []
+        for _file in paths:
+            _file = os.path.abspath(_file)
+            if not os.access(_file, os.R_OK):
+                bad_perms.append(_file)
+                continue
+
+            nfile = run_plugins_on_import(_file)
+            if nfile is not None:
+                _file = nfile
+            stat = os.stat(_file)
+            size = stat.st_size
+            ext = os.path.splitext(_file)[1].lower().replace('.', '')
+            timestamp = utcfromtimestamp(stat.st_mtime)
+            for row in range(self.formats.count()):
+                fmt = self.formats.item(row)
+                if fmt.ext.lower() == ext:
+                    self.formats.takeItem(row)
+                    break
+            Format(self.formats, ext, size, path=_file, timestamp=timestamp)
+            self.changed = True
+            added = True
+        if bad_perms:
+            error_dialog(self, _('No permission'),
+                    _('You do not have '
+                'permission to read the following files:'),
+                det_msg='\n'.join(bad_perms), show=True)
+
+        return added
+
+    def formats_dropped(self, event, paths):
+        if self._add_formats(paths):
+            event.accept()
+
+    def remove_format(self, *args):
+        rows = self.formats.selectionModel().selectedRows(0)
+        for row in rows:
+            self.formats.takeItem(row.row())
+            self.changed = True
+
+    def show_format(self, item, *args):
+        fmt = item.ext
+        self.dialog.view_format.emit(fmt)
+
+# }}}
+
+class Cover(ImageView): # {{{
+
+    def __init__(self, parent):
+        ImageView.__init__(self, parent)
+        self.dialog = parent
+        self._cdata = None
+        self.cover_changed.connect(self.set_pixmap_from_data)
+
+        self.select_cover_button = QPushButton(QIcon(I('document_open.png')),
+                _('&Browse'), parent)
+        self.trim_cover_button = QPushButton(QIcon(I('trim.png')),
+                _('T&rim'), parent)
+        self.remove_cover_button = QPushButton(QIcon(I('trash.png')),
+            _('&Remove'), parent)
+
+        self.select_cover_button.clicked.connect(self.select_cover)
+        self.remove_cover_button.clicked.connect(self.remove_cover)
+        self.trim_cover_button.clicked.connect(self.trim_cover)
+
+        self.download_cover_button = QPushButton(_('Download co&ver'), parent)
+        self.generate_cover_button = QPushButton(_('&Generate cover'), parent)
+
+        self.download_cover_button.clicked.connect(self.download_cover)
+        self.generate_cover_button.clicked.connect(self.generate_cover)
+
+        self.buttons = [self.select_cover_button, self.remove_cover_button,
+                self.trim_cover_button, self.download_cover_button,
+                self.generate_cover_button]
+
+    def select_cover(self, *args):
+        files = choose_images(self, 'change cover dialog',
+                             _('Choose cover for ') +
+                             self.dialog.title.current_val)
+        if not files:
+            return
+        _file = files[0]
+        if _file:
+            _file = os.path.abspath(_file)
+            if not os.access(_file, os.R_OK):
+                d = error_dialog(self, _('Cannot read'),
+                        _('You do not have permission to read the file: ') + _file)
+                d.exec_()
+                return
+            cf, cover = None, None
+            try:
+                cf = open(_file, "rb")
+                cover = cf.read()
+            except IOError, e:
+                d = error_dialog(self, _('Error reading file'),
+                        _("<p>There was an error reading from file: <br /><b>")
+                        + _file + "</b></p><br />"+str(e))
+                d.exec_()
+            if cover:
+                orig = self.current_val
+                self.current_val = cover
+                if self.current_val is None:
+                    self.current_val = orig
+                    error_dialog(self,
+                        _("Not a valid picture"),
+                            _file + _(" is not a valid picture"), show=True)
+
+    def remove_cover(self, *args):
+        self.current_val = None
+
+    def trim_cover(self, *args):
+        from calibre.utils.magick import Image
+        cdata = self.current_val
+        if not cdata:
+            return
+        im = Image()
+        im.load(cdata)
+        im.trim(10)
+        cdata = im.export('png')
+        self.current_val = cdata
+
+    def download_cover(self, *args):
+        pass # TODO: Implement this
+
+    def generate_cover(self, *args):
+        from calibre.ebooks import calibre_cover
+        from calibre.ebooks.metadata import fmt_sidx
+        from calibre.gui2 import config
+        title = self.dialog.title.current_val
+        author = authors_to_string(self.dialog.authors.current_val)
+        if not title or not author:
+            return error_dialog(self, _('Specify title and author'),
+                    _('You must specify a title and author before generating '
+                        'a cover'), show=True)
+        series = self.dialog.series.current_val
+        series_string = None
+        if series:
+            series_string = _('Book %s of %s')%(
+                    fmt_sidx(self.dialog.series_index.current_val,
+                    use_roman=config['use_roman_numerals_for_series_number']), series)
+        self.current_val = calibre_cover(title, author,
+                series_string=series_string)
+
+    def set_pixmap_from_data(self, data):
+        if not data:
+            self.current_val = None
+            return
+        orig = self.current_val
+        self.current_val = data
+        if self.current_val is None:
+            error_dialog(self, _('Invalid cover'),
+                    _('Could not change cover as the image is invalid.'),
+                    show=True)
+            self.current_val = orig
+
+    def initialize(self, db, id_):
+        self._cdata = None
+        self.current_val = db.cover(id_, index_is_id=True)
+        self.original_val = self.current_val
+
+    @property
+    def changed(self):
+        return self.current_val != self.original_val
+
+    @dynamic_property
+    def current_val(self):
+        def fget(self):
+            return self._cdata
+        def fset(self, cdata):
+            self._cdata = None
+            pm = QPixmap()
+            if cdata:
+                pm.loadFromData(cdata)
+            if pm.isNull():
+                pm = QPixmap(I('default_cover.png'))
+            else:
+                self._cdata = cdata
+            self.setPixmap(pm)
+            tt = _('This book has no cover')
+            if self._cdata:
+                tt = _('Cover size: %dx%d pixels') % \
+                (pm.width(), pm.height())
+            self.setToolTip(tt)
+
+        return property(fget=fget, fset=fset)
+
+    def commit(self, db, id_):
+        if self.changed:
+            if self.current_val:
+                db.set_cover(id_, self.current_val, notify=False, commit=False)
+            else:
+                db.remove_cover(id_, notify=False, commit=False)
+        return True
+
+# }}}
+
+class CommentsEdit(Editor): # {{{
+
+    @dynamic_property
+    def current_val(self):
+        def fget(self):
+            return self.html
+        def fset(self, val):
+            if not val or not val.strip():
+                val = ''
+            else:
+                val = comments_to_html(val)
+            self.html = val
+        return property(fget=fget, fset=fset)
+
+    def initialize(self, db, id_):
+        self.current_val = db.comments(id_, index_is_id=True)
+        self.original_val = self.current_val
+
+    def commit(self, db, id_):
+        db.set_comment(id_, self.current_val, notify=False, commit=False)
+        return True
+# }}}
+
+class RatingEdit(QSpinBox): # {{{
+    LABEL = _('&Rating:')
+    TOOLTIP = _('Rating of this book. 0-5 stars')
+
+    def __init__(self, parent):
+        QSpinBox.__init__(self, parent)
+        self.setToolTip(self.TOOLTIP)
+        self.setWhatsThis(self.TOOLTIP)
+        self.setMaximum(5)
+        self.setSuffix(' ' + _('stars'))
+
+    @dynamic_property
+    def current_val(self):
+        def fget(self):
+            return self.value()
+        def fset(self, val):
+            if val is None:
+                val = 0
+            val = int(val)
+            if val < 0:
+                val = 0
+            if val > 5:
+                val = 5
+            self.setValue(val)
+        return property(fget=fget, fset=fset)
+
+    def initialize(self, db, id_):
+        val = db.rating(id_, index_is_id=True)
+        if val > 0:
+            val = int(val/2.)
+        else:
+            val = 0
+        self.current_val = val
+        self.original_val = self.current_val
+
+    def commit(self, db, id_):
+        db.set_rating(id_, 2*self.current_val, notify=False, commit=False)
+        return True
+
+# }}}
+
+class TagsEdit(CompleteLineEdit): # {{{
+    LABEL = _('Ta&gs:')
+    TOOLTIP = '<p>'+_('Tags categorize the book. This is particularly '
+            'useful while searching. <br><br>They can be any words'
+            'or phrases, separated by commas.')
+
+    def __init__(self, parent):
+        CompleteLineEdit.__init__(self, parent)
+        self.setToolTip(self.TOOLTIP)
+        self.setWhatsThis(self.TOOLTIP)
+
+    @dynamic_property
+    def current_val(self):
+        def fget(self):
+            return [x.strip() for x in unicode(self.text()).split(',')]
+        def fset(self, val):
+            if not val:
+                val = []
+            self.setText(', '.join([x.strip() for x in val]))
+        return property(fget=fget, fset=fset)
+
+    def initialize(self, db, id_):
+        tags = db.tags(id_, index_is_id=True)
+        tags = tags.split(',') if tags else []
+        self.current_val = tags
+        self.update_items_cache(db.all_tags())
+        self.original_val = self.current_val
+
+    @property
+    def changed(self):
+        return self.current_val != self.original_val
+
+    def edit(self, db, id_):
+        if self.changed:
+            if question_dialog(self, _('Tags changed'),
+                    _('You have changed the tags. In order to use the tags'
+                       ' editor, you must either discard or apply these '
+                       'changes'), show_copy_button=False,
+                    buttons=QMessageBox.Apply|QMessageBox.Discard,
+                    yes_button=QMessageBox.Apply):
+                self.commit(db, id_)
+                db.commit()
+                self.original_val = self.current_val
+            else:
+                self.current_val = self.original_val
+        d = TagEditor(self, db, id_)
+        if d.exec_() == TagEditor.Accepted:
+            self.current_val = d.tags
+            self.update_items_cache(db.all_tags())
+
+
+    def commit(self, db, id_):
+        db.set_tags(id_, self.current_val, notify=False, commit=False)
+        return True
+
+# }}}
+
+class ISBNEdit(QLineEdit): # {{{
+    LABEL = _('IS&BN:')
+
+    def __init__(self, parent):
+        QLineEdit.__init__(self, parent)
+        self.pat = re.compile(r'[^0-9a-zA-Z]')
+        self.textChanged.connect(self.validate)
+
+    @dynamic_property
+    def current_val(self):
+        def fget(self):
+            return self.pat.sub('', unicode(self.text()).strip())
+        def fset(self, val):
+            if not val:
+                val = ''
+            self.setText(val.strip())
+        return property(fget=fget, fset=fset)
+
+    def initialize(self, db, id_):
+        self.current_val = db.isbn(id_, index_is_id=True)
+        self.original_val = self.current_val
+
+    def commit(self, db, id_):
+        db.set_isbn(id_, self.current_val, notify=False, commit=False)
+        return True
+
+    def validate(self, *args):
+        isbn = self.current_val
+        tt = _('This ISBN number is valid')
+        if not isbn:
+            col = 'rgba(0,255,0,0%)'
+        elif check_isbn(isbn) is not None:
+            col = 'rgba(0,255,0,20%)'
+        else:
+            col = 'rgba(255,0,0,20%)'
+            tt = _('This ISBN number is invalid')
+        self.setToolTip(tt)
+        self.setStyleSheet('QLineEdit { background-color: %s }'%col)
+
+# }}}
+
+class PublisherEdit(EnComboBox): # {{{
+    LABEL = _('&Publisher:')
+
+    def __init__(self, parent):
+        EnComboBox.__init__(self, parent)
+        self.setSizeAdjustPolicy(
+                self.AdjustToMinimumContentsLengthWithIcon)
+
+    @dynamic_property
+    def current_val(self):
+
+        def fget(self):
+            return unicode(self.currentText()).strip()
+
+        def fset(self, val):
+            if not val:
+                val = ''
+            self.setEditText(val.strip())
+            self.setCursorPosition(0)
+
+        return property(fget=fget, fset=fset)
+
+    def initialize(self, db, id_):
+        all_publishers = db.all_publishers()
+        all_publishers.sort(key=lambda x : sort_key(x[1]))
+        publisher_id = db.publisher_id(id_, index_is_id=True)
+        idx, c = None, 0
+        for i in all_publishers:
+            id, name = i
+            if id == publisher_id:
+                idx = c
+            self.addItem(name)
+            c += 1
+
+        self.setEditText('')
+        if idx is not None:
+            self.setCurrentIndex(idx)
+
+    def commit(self, db, id_):
+        db.set_publisher(id_, self.current_val, notify=False, commit=False)
+        return True
+
+# }}}
+
+

src/calibre/gui2/metadata/single.py

@@ -5,924 +5,17 @@ __license__   = 'GPL v3'
 __copyright__ = '2011, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
-import textwrap, re, os
 
-from PyQt4.Qt import QDialogButtonBox, Qt, QTabWidget, QScrollArea, \
-    QVBoxLayout, QIcon, QToolButton, QWidget, QLabel, QGridLayout, \
-    QDoubleSpinBox, QListWidgetItem, QSize, pyqtSignal, QPixmap, \
-    QSplitter, QPushButton, QGroupBox, QHBoxLayout, QSpinBox, \
-    QMessageBox, QLineEdit
+from PyQt4.Qt import Qt, QVBoxLayout, QHBoxLayout, QWidget, \
+        QGridLayout, pyqtSignal, QDialogButtonBox, QScrollArea, \
+        QTabWidget, QIcon, QToolButton, QSplitter, QGroupBox
 
-from calibre.gui2 import ResizableDialog, file_icon_provider, \
-        choose_files, error_dialog, choose_images, question_dialog
-from calibre.utils.icu import sort_key
-from calibre.utils.config import tweaks
-from calibre.gui2.widgets import EnLineEdit, CompleteComboBox, \
-        EnComboBox, FormatList, ImageView, CompleteLineEdit
-from calibre.ebooks.metadata import title_sort, authors_to_string, \
-        string_to_authors, check_isbn
-from calibre.utils.date import local_tz
-from calibre import strftime
-from calibre.ebooks import BOOK_EXTENSIONS
-from calibre.customize.ui import run_plugins_on_import
-from calibre.utils.date import utcfromtimestamp
-from calibre.gui2.comments_editor import Editor
-from calibre.library.comments import comments_to_html
-from calibre.gui2.dialogs.tag_editor import TagEditor
-
-'''
-The interface common to all widgets used to set basic metadata
-class BasicMetadataWidget(object):
-
-    LABEL = "label text"
-
-    def initialize(self, db, id_):
-        pass
-
-    def commit(self, db, id_):
-        return True
-
-    @dynamic_property
-    def current_val(self):
-        # Present in most but not all basic metadata widgets
-        def fget(self):
-            return None
-        def fset(self, val):
-            pass
-        return property(fget=fget, fset=fset)
-'''
-
-# Title {{{
-class TitleEdit(EnLineEdit):
-
-    TITLE_ATTR = 'title'
-    COMMIT = True
-    TOOLTIP = _('Change the title of this book')
-    LABEL = _('&Title:')
-
-    def __init__(self, parent):
-        self.dialog = parent
-        EnLineEdit.__init__(self, parent)
-        self.setToolTip(self.TOOLTIP)
-        self.setWhatsThis(self.TOOLTIP)
-
-    def get_default(self):
-        return _('Unknown')
-
-    def initialize(self, db, id_):
-        title = getattr(db, self.TITLE_ATTR)(id_, index_is_id=True)
-        self.current_val = title
-        self.original_val = self.current_val
-
-    def commit(self, db, id_):
-        title = self.current_val
-        if self.COMMIT:
-            getattr(db, 'set_', self.TITLE_ATTR)(id_, title, notify=False)
-        else:
-            getattr(db, 'set_', self.TITLE_ATTR)(id_, title, notify=False,
-                    commit=False)
-        return True
-
-    @dynamic_property
-    def current_val(self):
-
-        def fget(self):
-            title = unicode(self.text()).strip()
-            if not title:
-                title = self.get_default()
-            return title
-
-        def fset(self, val):
-            if hasattr(val, 'strip'):
-                val = val.strip()
-            if not val:
-                val = self.get_default()
-            self.setText(val)
-            self.setCursorPosition(0)
-
-        return property(fget=fget, fset=fset)
-
-class TitleSortEdit(TitleEdit):
-
-    TITLE_ATTR = 'title_sort'
-    COMMIT = False
-    TOOLTIP = _('Specify how this book should be sorted when by title.'
-            ' For example, The Exorcist might be sorted as Exorcist, The.')
-    LABEL = _('Title &sort:')
-
-    def __init__(self, parent, title_edit, autogen_button):
-        TitleEdit.__init__(self, parent)
-        self.title_edit = title_edit
-
-        base = self.TOOLTIP
-        ok_tooltip = '<p>' + textwrap.fill(base+'<br><br>'+
-                            _(' The green color indicates that the current '
-                              'title sort matches the current title'))
-        bad_tooltip = '<p>'+textwrap.fill(base + '<br><br>'+
-                _(' The red color warns that the current '
-                  'title sort does not match the current title. '
-                  'No action is required if this is what you want.'))
-        self.tooltips = (ok_tooltip, bad_tooltip)
-
-        self.title_edit.textChanged.connect(self.update_state)
-        self.textChanged.connect(self.update_state)
-
-        autogen_button.clicked.connect(self.auto_generate)
-        self.update_state()
-
-    def update_state(self, *args):
-        ts = title_sort(self.title_edit.current_val)
-        normal = ts == self.current_val
-        if normal:
-            col = 'rgb(0, 255, 0, 20%)'
-        else:
-            col = 'rgb(255, 0, 0, 20%)'
-        self.setStyleSheet('QLineEdit { color: black; '
-                              'background-color: %s; }'%col)
-        tt = self.tooltips[0 if normal else 1]
-        self.setToolTip(tt)
-        self.setWhatsThis(tt)
-
-    def auto_generate(self, *args):
-        self.current_val = title_sort(self.title_edit.current_val)
-
-# }}}
-
-# Authors {{{
-class AuthorsEdit(CompleteComboBox):
-
-    TOOLTIP = ''
-    LABEL = _('&Author(s):')
-
-    def __init__(self, parent):
-        self.dialog = parent
-        CompleteComboBox.__init__(self, parent)
-        self.setToolTip(self.TOOLTIP)
-        self.setWhatsThis(self.TOOLTIP)
-        self.setEditable(True)
-        self.setSizeAdjustPolicy(self.AdjustToMinimumContentsLengthWithIcon)
-
-    def get_default(self):
-        return _('Unknown')
-
-    def initialize(self, db, id_):
-        all_authors = db.all_authors()
-        all_authors.sort(key=lambda x : sort_key(x[1]))
-        for i in all_authors:
-            id, name = i
-            name = [name.strip().replace('|', ',') for n in name.split(',')]
-            self.addItem(authors_to_string(name))
-
-        self.set_separator('&')
-        self.set_space_before_sep(True)
-        self.update_items_cache(db.all_author_names())
-
-        au = db.authors(id_, index_is_id=True)
-        if not au:
-            au = _('Unknown')
-        self.current_val = [a.strip().replace('|', ',') for a in au.split(',')]
-        self.original_val = self.current_val
-
-    def commit(self, db, id_):
-        authors = self.current_val
-        db.set_authors(id_, authors, notify=False)
-        return True
-
-    @dynamic_property
-    def current_val(self):
-
-        def fget(self):
-            au = unicode(self.text()).strip()
-            if not au:
-                au = self.get_default()
-            return string_to_authors(au)
-
-        def fset(self, val):
-            if not val:
-                val = [self.get_default()]
-            self.setEditText(' & '.join([x.strip() for x in val]))
-            self.lineEdit().setCursorPosition(0)
-
-
-        return property(fget=fget, fset=fset)
-
-class AuthorSortEdit(EnLineEdit):
-
-    TOOLTIP = _('Specify how the author(s) of this book should be sorted. '
-            'For example Charles Dickens should be sorted as Dickens, '
-            'Charles.\nIf the box is colored green, then text matches '
-            'the individual author\'s sort strings. If it is colored '
-            'red, then the authors and this text do not match.')
-    LABEL = _('Author s&ort:')
-
-    def __init__(self, parent, authors_edit, autogen_button, db):
-        EnLineEdit.__init__(self, parent)
-        self.authors_edit = authors_edit
-        self.db = db
-
-        base = self.TOOLTIP
-        ok_tooltip = '<p>' + textwrap.fill(base+'<br><br>'+
-                _(' The green color indicates that the current '
-                    'author sort matches the current author'))
-        bad_tooltip = '<p>'+textwrap.fill(base + '<br><br>'+
-                _(' The red color indicates that the current '
-                    'author sort does not match the current author. '
-                    'No action is required if this is what you want.'))
-        self.tooltips = (ok_tooltip, bad_tooltip)
-
-        self.authors_edit.editTextChanged.connect(self.update_state)
-        self.textChanged.connect(self.update_state)
-
-        autogen_button.clicked.connect(self.auto_generate)
-        self.update_state()
-
-    @dynamic_property
-    def current_val(self):
-
-        def fget(self):
-            return unicode(self.text()).strip()
-
-        def fset(self, val):
-            if not val:
-                val = ''
-            self.setText(val.strip())
-            self.setCursorPosition(0)
-
-        return property(fget=fget, fset=fset)
-
-    def update_state(self, *args):
-        au = unicode(self.authors_edit.text())
-        au = re.sub(r'\s+et al\.$', '', au)
-        au = self.db.author_sort_from_authors(string_to_authors(au))
-
-        normal = au == self.current_val
-        if normal:
-            col = 'rgb(0, 255, 0, 20%)'
-        else:
-            col = 'rgb(255, 0, 0, 20%)'
-        self.setStyleSheet('QLineEdit { color: black; '
-                              'background-color: %s; }'%col)
-        tt = self.tooltips[0 if normal else 1]
-        self.setToolTip(tt)
-        self.setWhatsThis(tt)
-
-    def auto_generate(self, *args):
-        au = unicode(self.authors_edit.text())
-        au = re.sub(r'\s+et al\.$', '', au)
-        authors = string_to_authors(au)
-        self.current_val = self.db.author_sort_from_authors(authors)
-
-    def initialize(self, db, id_):
-        self.current_val = db.author_sort(id_, index_is_id=True)
-
-    def commit(self, db, id_):
-        aus = self.current_val
-        db.set_author_sort(id_, aus, notify=False, commit=False)
-        return True
-
-# }}}
-
-# Series {{{
-class SeriesEdit(EnComboBox):
-
-    TOOLTIP = _('List of known series. You can add new series.')
-    LABEL = _('&Series:')
-
-    def __init__(self, parent):
-        EnComboBox.__init__(self, parent)
-        self.dialog = parent
-        self.setSizeAdjustPolicy(
-                self.AdjustToMinimumContentsLengthWithIcon)
-        self.setToolTip(self.TOOLTIP)
-        self.setWhatsThis(self.TOOLTIP)
-        self.setEditable(True)
-
-    @dynamic_property
-    def current_val(self):
-
-        def fget(self):
-            return unicode(self.currentText()).strip()
-
-        def fset(self, val):
-            if not val:
-                val = ''
-            self.setEditText(val.strip())
-            self.setCursorPosition(0)
-
-        return property(fget=fget, fset=fset)
-
-    def initialize(self, db, id_):
-        all_series = db.all_series()
-        all_series.sort(key=lambda x : sort_key(x[1]))
-        series_id = db.series_id(id_, index_is_id=True)
-        idx, c = None, 0
-        for i in all_series:
-            id, name = i
-            if id == series_id:
-                idx = c
-            self.addItem(name)
-            c += 1
-
-        self.lineEdit().setText('')
-        if idx is not None:
-            self.setCurrentIndex(idx)
-        self.original_val = self.current_val
-
-    def commit(self, db, id_):
-        series = self.current_val
-        db.set_series(id_, series, notify=False, commit=True)
-        return True
-
-class SeriesIndexEdit(QDoubleSpinBox):
-
-    TOOLTIP = ''
-    LABEL = _('&Number:')
-
-    def __init__(self, parent, series_edit):
-        QDoubleSpinBox.__init__(self, parent)
-        self.dialog = parent
-        self.db = self.original_series_name = None
-        self.setMaximum(1000000)
-        self.series_edit = series_edit
-        series_edit.currentIndexChanged.connect(self.enable)
-        series_edit.editTextChanged.connect(self.enable)
-        series_edit.lineEdit().editingFinished.connect(self.increment)
-        self.enable()
-
-    def enable(self, *args):
-        self.setEnabled(bool(self.series_edit.current_val))
-
-    @dynamic_property
-    def current_val(self):
-
-        def fget(self):
-            return self.value()
-
-        def fset(self, val):
-            if val is None:
-                val = 1.0
-            val = float(val)
-            self.setValue(val)
-
-        return property(fget=fget, fset=fset)
-
-    def initialize(self, db, id_):
-        self.db = db
-        if self.series_edit.current_val:
-            val = db.series_index(id_, index_is_id=True)
-        else:
-            val = 1.0
-        self.current_val = val
-        self.original_val = self.current_val
-        self.original_series_name = self.series_edit.original_val
-
-    def commit(self, db, id_):
-        db.set_series_index(id_, self.current_val, notify=False, commit=False)
-        return True
-
-    def increment(self):
-        if self.db is not None:
-            try:
-                series = self.series_edit.current_val
-                if series and series != self.original_series_name:
-                    ns = 1.0
-                    if tweaks['series_index_auto_increment'] != 'const':
-                        ns = self.db.get_next_series_num_for(series)
-                    self.current_val = ns
-                    self.original_series_name = series
-            except:
-                import traceback
-                traceback.print_exc()
-
-
-# }}}
-
-class BuddyLabel(QLabel): # {{{
-
-    def __init__(self, buddy):
-        QLabel.__init__(self, buddy.LABEL)
-        self.setBuddy(buddy)
-        self.setAlignment(Qt.AlignRight|Qt.AlignVCenter)
-# }}}
-
-class Format(QListWidgetItem): # {{{
-
-    def __init__(self, parent, ext, size, path=None, timestamp=None):
-        self.path = path
-        self.ext = ext
-        self.size = float(size)/(1024*1024)
-        text = '%s (%.2f MB)'%(self.ext.upper(), self.size)
-        QListWidgetItem.__init__(self, file_icon_provider().icon_from_ext(ext),
-                                 text, parent, QListWidgetItem.UserType)
-        if timestamp is not None:
-            ts = timestamp.astimezone(local_tz)
-            t = strftime('%a, %d %b %Y [%H:%M:%S]', ts.timetuple())
-            text = _('Last modified: %s')%t
-            self.setToolTip(text)
-            self.setStatusTip(text)
-
-# }}}
-
-class FormatsManager(QWidget): # {{{
-
-    def __init__(self, parent):
-        QWidget.__init__(self, parent)
-        self.dialog = parent
-        self.changed = False
-
-        self.l = l = QGridLayout()
-        self.setLayout(l)
-        self.cover_from_format_button = QToolButton(self)
-        self.cover_from_format_button.setToolTip(
-                _('Set the cover for the book from the selected format'))
-        self.cover_from_format_button.setIcon(QIcon(I('book.png')))
-        self.cover_from_format_button.setIconSize(QSize(32, 32))
-
-        self.metadata_from_format_button = QToolButton(self)
-        self.metadata_from_format_button.setIcon(QIcon(I('edit_input.png')))
-        self.metadata_from_format_button.setIconSize(QSize(32, 32))
-        # TODO: Implement the *_from_format buttons
-
-        self.add_format_button = QToolButton(self)
-        self.add_format_button.setIcon(QIcon(I('add_book.png')))
-        self.add_format_button.setIconSize(QSize(32, 32))
-        self.add_format_button.clicked.connect(self.add_format)
-
-        self.remove_format_button = QToolButton(self)
-        self.remove_format_button.setIcon(QIcon(I('trash.png')))
-        self.remove_format_button.setIconSize(QSize(32, 32))
-        self.remove_format_button.clicked.connect(self.remove_format)
-
-        self.formats = FormatList(self)
-        self.formats.setAcceptDrops(True)
-        self.formats.formats_dropped.connect(self.formats_dropped)
-        self.formats.delete_format.connect(self.remove_format)
-        self.formats.itemDoubleClicked.connect(self.show_format)
-        self.formats.setDragDropMode(self.formats.DropOnly)
-        self.formats.setIconSize(QSize(32, 32))
-        self.formats.setMaximumWidth(200)
-
-        l.addWidget(self.cover_from_format_button,    0, 0, 1, 1)
-        l.addWidget(self.metadata_from_format_button, 2, 0, 1, 1)
-        l.addWidget(self.add_format_button,           0, 2, 1, 1)
-        l.addWidget(self.remove_format_button,        2, 2, 1, 1)
-        l.addWidget(self.formats,                     0, 1, 3, 1)
-
-
-
-    def initialize(self, db, id_):
-        self.changed = False
-        exts = db.formats(id_, index_is_id=True)
-        if exts:
-            exts = exts.split(',')
-            for ext in exts:
-                if not ext:
-                    ext = ''
-                size = db.sizeof_format(id_, ext, index_is_id=True)
-                timestamp = db.format_last_modified(id_, ext)
-                if size is None:
-                    continue
-                Format(self.formats, ext, size, timestamp=timestamp)
-
-    def commit(self, db, id_):
-        if not self.changed:
-            return True
-        old_extensions, new_extensions, paths = set(), set(), {}
-        for row in range(self.formats.count()):
-            fmt = self.formats.item(row)
-            ext, path = fmt.ext.lower(), fmt.path
-            if 'unknown' in ext.lower():
-                ext = None
-            if path:
-                new_extensions.add(ext)
-                paths[ext] = path
-            else:
-                old_extensions.add(ext)
-        for ext in new_extensions:
-            db.add_format(id_, ext, open(paths[ext], 'rb'), notify=False,
-                    index_is_id=True)
-        db_extensions = set([f.lower() for f in db.formats(id_,
-            index_is_id=True).split(',')])
-        extensions = new_extensions.union(old_extensions)
-        for ext in db_extensions:
-            if ext not in extensions:
-                db.remove_format(id_, ext, notify=False, index_is_id=True)
-
-        self.changed = False
-        return True
-
-    def add_format(self, *args):
-        files = choose_files(self, 'add formats dialog',
-                             _("Choose formats for ") +
-                             self.dialog.title.current_val,
-                             [(_('Books'), BOOK_EXTENSIONS)])
-        self._add_formats(files)
-
-    def _add_formats(self, paths):
-        added = False
-        if not paths:
-            return added
-        bad_perms = []
-        for _file in paths:
-            _file = os.path.abspath(_file)
-            if not os.access(_file, os.R_OK):
-                bad_perms.append(_file)
-                continue
-
-            nfile = run_plugins_on_import(_file)
-            if nfile is not None:
-                _file = nfile
-            stat = os.stat(_file)
-            size = stat.st_size
-            ext = os.path.splitext(_file)[1].lower().replace('.', '')
-            timestamp = utcfromtimestamp(stat.st_mtime)
-            for row in range(self.formats.count()):
-                fmt = self.formats.item(row)
-                if fmt.ext.lower() == ext:
-                    self.formats.takeItem(row)
-                    break
-            Format(self.formats, ext, size, path=_file, timestamp=timestamp)
-            self.changed = True
-            added = True
-        if bad_perms:
-            error_dialog(self, _('No permission'),
-                    _('You do not have '
-                'permission to read the following files:'),
-                det_msg='\n'.join(bad_perms), show=True)
-
-        return added
-
-    def formats_dropped(self, event, paths):
-        if self._add_formats(paths):
-            event.accept()
-
-    def remove_format(self, *args):
-        rows = self.formats.selectionModel().selectedRows(0)
-        for row in rows:
-            self.formats.takeItem(row.row())
-            self.changed = True
-
-    def show_format(self, item, *args):
-        fmt = item.ext
-        self.dialog.view_format.emit(fmt)
-
-# }}}
-
-class Cover(ImageView): # {{{
-
-    def __init__(self, parent):
-        ImageView.__init__(self, parent)
-        self.dialog = parent
-        self._cdata = None
-        self.cover_changed.connect(self.set_pixmap_from_data)
-
-        self.select_cover_button = QPushButton(QIcon(I('document_open.png')),
-                _('&Browse'), parent)
-        self.trim_cover_button = QPushButton(QIcon(I('trim.png')),
-                _('T&rim'), parent)
-        self.remove_cover_button = QPushButton(QIcon(I('trash.png')),
-            _('&Remove'), parent)
-
-        self.select_cover_button.clicked.connect(self.select_cover)
-        self.remove_cover_button.clicked.connect(self.remove_cover)
-        self.trim_cover_button.clicked.connect(self.trim_cover)
-
-        self.download_cover_button = QPushButton(_('Download co&ver'), parent)
-        self.generate_cover_button = QPushButton(_('&Generate cover'), parent)
-
-        self.download_cover_button.clicked.connect(self.download_cover)
-        self.generate_cover_button.clicked.connect(self.generate_cover)
-
-        self.buttons = [self.select_cover_button, self.remove_cover_button,
-                self.trim_cover_button, self.download_cover_button,
-                self.generate_cover_button]
-
-    def select_cover(self, *args):
-        files = choose_images(self, 'change cover dialog',
-                             _('Choose cover for ') +
-                             self.dialog.title.current_val)
-        if not files:
-            return
-        _file = files[0]
-        if _file:
-            _file = os.path.abspath(_file)
-            if not os.access(_file, os.R_OK):
-                d = error_dialog(self, _('Cannot read'),
-                        _('You do not have permission to read the file: ') + _file)
-                d.exec_()
-                return
-            cf, cover = None, None
-            try:
-                cf = open(_file, "rb")
-                cover = cf.read()
-            except IOError, e:
-                d = error_dialog(self, _('Error reading file'),
-                        _("<p>There was an error reading from file: <br /><b>")
-                        + _file + "</b></p><br />"+str(e))
-                d.exec_()
-            if cover:
-                orig = self.current_val
-                self.current_val = cover
-                if self.current_val is None:
-                    self.current_val = orig
-                    error_dialog(self,
-                        _("Not a valid picture"),
-                            _file + _(" is not a valid picture"), show=True)
-
-    def remove_cover(self, *args):
-        self.current_val = None
-
-    def trim_cover(self, *args):
-        from calibre.utils.magick import Image
-        cdata = self.current_val
-        if not cdata:
-            return
-        im = Image()
-        im.load(cdata)
-        im.trim(10)
-        cdata = im.export('png')
-        self.current_val = cdata
-
-    def download_cover(self, *args):
-        pass # TODO: Implement this
-
-    def generate_cover(self, *args):
-        from calibre.ebooks import calibre_cover
-        from calibre.ebooks.metadata import fmt_sidx
-        from calibre.gui2 import config
-        title = self.dialog.title.current_val
-        author = authors_to_string(self.dialog.authors.current_val)
-        if not title or not author:
-            return error_dialog(self, _('Specify title and author'),
-                    _('You must specify a title and author before generating '
-                        'a cover'), show=True)
-        series = self.dialog.series.current_val
-        series_string = None
-        if series:
-            series_string = _('Book %s of %s')%(
-                    fmt_sidx(self.dialog.series_index.current_val,
-                    use_roman=config['use_roman_numerals_for_series_number']), series)
-        self.current_val = calibre_cover(title, author,
-                series_string=series_string)
-
-    def set_pixmap_from_data(self, data):
-        if not data:
-            self.current_val = None
-            return
-        orig = self.current_val
-        self.current_val = data
-        if self.current_val is None:
-            error_dialog(self, _('Invalid cover'),
-                    _('Could not change cover as the image is invalid.'),
-                    show=True)
-            self.current_val = orig
-
-    def initialize(self, db, id_):
-        self._cdata = None
-        self.current_val = db.cover(id_, index_is_id=True)
-        self.original_val = self.current_val
-
-    @property
-    def changed(self):
-        return self.current_val != self.original_val
-
-    @dynamic_property
-    def current_val(self):
-        def fget(self):
-            return self._cdata
-        def fset(self, cdata):
-            self._cdata = None
-            pm = QPixmap()
-            if cdata:
-                pm.loadFromData(cdata)
-            if pm.isNull():
-                pm = QPixmap(I('default_cover.png'))
-            else:
-                self._cdata = cdata
-            self.setPixmap(pm)
-            tt = _('This book has no cover')
-            if self._cdata:
-                tt = _('Cover size: %dx%d pixels') % \
-                (pm.width(), pm.height())
-            self.setToolTip(tt)
-
-        return property(fget=fget, fset=fset)
-
-    def commit(self, db, id_):
-        if self.changed:
-            if self.current_val:
-                db.set_cover(id_, self.current_val, notify=False, commit=False)
-            else:
-                db.remove_cover(id_, notify=False, commit=False)
-        return True
-
-# }}}
-
-class CommentsEdit(Editor): # {{{
-
-    @dynamic_property
-    def current_val(self):
-        def fget(self):
-            return self.html
-        def fset(self, val):
-            if not val or not val.strip():
-                val = ''
-            else:
-                val = comments_to_html(val)
-            self.html = val
-        return property(fget=fget, fset=fset)
-
-    def initialize(self, db, id_):
-        self.current_val = db.comments(id_, index_is_id=True)
-        self.original_val = self.current_val
-
-    def commit(self, db, id_):
-        db.set_comment(id_, self.current_val, notify=False, commit=False)
-        return True
-# }}}
-
-class RatingEdit(QSpinBox): # {{{
-    LABEL = _('&Rating:')
-    TOOLTIP = _('Rating of this book. 0-5 stars')
-
-    def __init__(self, parent):
-        QSpinBox.__init__(self, parent)
-        self.setToolTip(self.TOOLTIP)
-        self.setWhatsThis(self.TOOLTIP)
-        self.setMaximum(5)
-        self.setSuffix(' ' + _('stars'))
-
-    @dynamic_property
-    def current_val(self):
-        def fget(self):
-            return self.value()
-        def fset(self, val):
-            if val is None:
-                val = 0
-            val = int(val)
-            if val < 0:
-                val = 0
-            if val > 5:
-                val = 5
-            self.setValue(val)
-        return property(fget=fget, fset=fset)
-
-    def initialize(self, db, id_):
-        val = db.rating(id_, index_is_id=True)
-        if val > 0:
-            val = int(val/2.)
-        else:
-            val = 0
-        self.current_val = val
-        self.original_val = self.current_val
-
-    def commit(self, db, id_):
-        db.set_rating(id_, 2*self.current_val, notify=False, commit=False)
-        return True
-
-# }}}
-
-class TagsEdit(CompleteLineEdit): # {{{
-    LABEL = _('Ta&gs:')
-    TOOLTIP = '<p>'+_('Tags categorize the book. This is particularly '
-            'useful while searching. <br><br>They can be any words'
-            'or phrases, separated by commas.')
-
-    def __init__(self, parent):
-        CompleteLineEdit.__init__(self, parent)
-        self.setToolTip(self.TOOLTIP)
-        self.setWhatsThis(self.TOOLTIP)
-
-    @dynamic_property
-    def current_val(self):
-        def fget(self):
-            return [x.strip() for x in unicode(self.text()).split(',')]
-        def fset(self, val):
-            if not val:
-                val = []
-            self.setText(', '.join([x.strip() for x in val]))
-        return property(fget=fget, fset=fset)
-
-    def initialize(self, db, id_):
-        tags = db.tags(id_, index_is_id=True)
-        tags = tags.split(',') if tags else []
-        self.current_val = tags
-        self.update_items_cache(db.all_tags())
-        self.original_val = self.current_val
-
-    @property
-    def changed(self):
-        return self.current_val != self.original_val
-
-    def edit(self, db, id_):
-        if self.changed:
-            if question_dialog(self, _('Tags changed'),
-                    _('You have changed the tags. In order to use the tags'
-                       ' editor, you must either discard or apply these '
-                       'changes'), show_copy_button=False,
-                    buttons=QMessageBox.Apply|QMessageBox.Discard,
-                    yes_button=QMessageBox.Apply):
-                self.commit(db, id_)
-                db.commit()
-                self.original_val = self.current_val
-            else:
-                self.current_val = self.original_val
-        d = TagEditor(self, db, id_)
-        if d.exec_() == TagEditor.Accepted:
-            self.current_val = d.tags
-            self.update_items_cache(db.all_tags())
-
-
-    def commit(self, db, id_):
-        db.set_tags(id_, self.current_val, notify=False, commit=False)
-        return True
-
-# }}}
-
-class ISBNEdit(QLineEdit): # {{{
-    LABEL = _('IS&BN:')
-
-    def __init__(self, parent):
-        QLineEdit.__init__(self, parent)
-        self.pat = re.compile(r'[^0-9a-zA-Z]')
-        self.textChanged.connect(self.validate)
-
-    @dynamic_property
-    def current_val(self):
-        def fget(self):
-            return self.pat.sub('', unicode(self.text()).strip())
-        def fset(self, val):
-            if not val:
-                val = ''
-            self.setText(val.strip())
-        return property(fget=fget, fset=fset)
-
-    def initialize(self, db, id_):
-        self.current_val = db.isbn(id_, index_is_id=True)
-        self.original_val = self.current_val
-
-    def commit(self, db, id_):
-        db.set_isbn(id_, self.current_val, notify=False, commit=False)
-        return True
-
-    def validate(self, *args):
-        isbn = self.current_val
-        tt = _('This ISBN number is valid')
-        if not isbn:
-            col = 'rgba(0,255,0,0%)'
-        elif check_isbn(isbn) is not None:
-            col = 'rgba(0,255,0,20%)'
-        else:
-            col = 'rgba(255,0,0,20%)'
-            tt = _('This ISBN number is invalid')
-        self.setToolTip(tt)
-        self.setStyleSheet('QLineEdit { background-color: %s }'%col)
-
-# }}}
-
-class PublisherEdit(EnComboBox): # {{{
-    LABEL = _('&Publisher:')
-
-    def __init__(self, parent):
-        EnComboBox.__init__(self, parent)
-        self.setSizeAdjustPolicy(
-                self.AdjustToMinimumContentsLengthWithIcon)
-
-    @dynamic_property
-    def current_val(self):
-
-        def fget(self):
-            return unicode(self.currentText()).strip()
-
-        def fset(self, val):
-            if not val:
-                val = ''
-            self.setEditText(val.strip())
-            self.setCursorPosition(0)
-
-        return property(fget=fget, fset=fset)
-
-    def initialize(self, db, id_):
-        all_publishers = db.all_publishers()
-        all_publishers.sort(key=lambda x : sort_key(x[1]))
-        publisher_id = db.publisher_id(id_, index_is_id=True)
-        idx, c = None, 0
-        for i in all_publishers:
-            id, name = i
-            if id == publisher_id:
-                idx = c
-            self.addItem(name)
-            c += 1
-
-        self.setEditText('')
-        if idx is not None:
-            self.setCurrentIndex(idx)
-
-    def commit(self, db, id_):
-        db.set_publisher(id_, self.current_val, notify=False, commit=False)
-        return True
-
-# }}}
+from calibre.ebooks.metadata import authors_to_string, string_to_authors
+from calibre.gui2 import ResizableDialog
+from calibre.gui2.metadata.basic_widgets import TitleEdit, AuthorsEdit, \
+    AuthorSortEdit, TitleSortEdit, SeriesEdit, SeriesIndexEdit, ISBNEdit, \
+    RatingEdit, PublisherEdit, TagsEdit, FormatsManager, Cover, CommentsEdit, \
+    BuddyLabel
 
 class MetadataSingleDialog(ResizableDialog):