Ejemplo n.º 1
0
class Config(QDialog):
    '''
    Configuration dialog for single book conversion. If accepted, has the
    following important attributes

    output_format - Output format (without a leading .)
    input_format  - Input format (without a leading .)
    opf_path - Path to OPF file with user specified metadata
    cover_path - Path to user specified cover (can be None)
    recommendations - A pickled list of 3 tuples in the same format as the
    recommendations member of the Input/Output plugins.
    '''
    def __init__(self,
                 parent,
                 db,
                 book_id,
                 preferred_input_format=None,
                 preferred_output_format=None):
        QDialog.__init__(self, parent)
        self.setupUi()
        self.opt_individual_saved_settings.setVisible(False)
        self.db, self.book_id = db, book_id

        self.setup_input_output_formats(self.db, self.book_id,
                                        preferred_input_format,
                                        preferred_output_format)
        self.setup_pipeline()

        self.input_formats.currentIndexChanged[native_string_type].connect(
            self.setup_pipeline)
        self.output_formats.currentIndexChanged[native_string_type].connect(
            self.setup_pipeline)
        self.groups.setSpacing(5)
        self.groups.activated[(QModelIndex)].connect(self.show_pane)
        self.groups.clicked[(QModelIndex)].connect(self.show_pane)
        self.groups.entered[(QModelIndex)].connect(self.show_group_help)
        rb = self.buttonBox.button(self.buttonBox.RestoreDefaults)
        rb.setText(_('Restore &defaults'))
        rb.clicked.connect(self.restore_defaults)
        self.groups.setMouseTracking(True)
        geom = gprefs.get('convert_single_dialog_geom', None)
        if geom:
            self.restoreGeometry(geom)
        else:
            self.resize(self.sizeHint())

    def setupUi(self):
        self.setObjectName("Dialog")
        self.resize(1024, 700)
        self.setWindowIcon(QIcon(I('convert.png')))
        self.gridLayout = QGridLayout(self)
        self.gridLayout.setObjectName("gridLayout")
        self.horizontalLayout = QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.input_label = QLabel(self)
        self.input_label.setObjectName("input_label")
        self.horizontalLayout.addWidget(self.input_label)
        self.input_formats = QComboBox(self)
        self.input_formats.setSizeAdjustPolicy(
            QComboBox.AdjustToMinimumContentsLengthWithIcon)
        self.input_formats.setMinimumContentsLength(5)
        self.input_formats.setObjectName("input_formats")
        self.horizontalLayout.addWidget(self.input_formats)
        self.opt_individual_saved_settings = QCheckBox(self)
        self.opt_individual_saved_settings.setObjectName(
            "opt_individual_saved_settings")
        self.horizontalLayout.addWidget(self.opt_individual_saved_settings)
        spacerItem = QSpacerItem(40, 20, QSizePolicy.Expanding,
                                 QSizePolicy.Minimum)
        self.horizontalLayout.addItem(spacerItem)
        self.label_2 = QLabel(self)
        self.label_2.setObjectName("label_2")
        self.horizontalLayout.addWidget(self.label_2)
        self.output_formats = QComboBox(self)
        self.output_formats.setSizeAdjustPolicy(
            QComboBox.AdjustToMinimumContentsLengthWithIcon)
        self.output_formats.setMinimumContentsLength(5)
        self.output_formats.setObjectName("output_formats")
        self.horizontalLayout.addWidget(self.output_formats)
        self.gridLayout.addLayout(self.horizontalLayout, 0, 0, 1, 2)
        self.groups = QListView(self)
        sizePolicy = QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(1)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(
            self.groups.sizePolicy().hasHeightForWidth())
        self.groups.setSizePolicy(sizePolicy)
        self.groups.setTabKeyNavigation(True)
        self.groups.setIconSize(QSize(48, 48))
        self.groups.setWordWrap(True)
        self.groups.setObjectName("groups")
        self.gridLayout.addWidget(self.groups, 1, 0, 3, 1)
        self.scrollArea = QScrollArea(self)
        sizePolicy = QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(4)
        sizePolicy.setVerticalStretch(10)
        sizePolicy.setHeightForWidth(
            self.scrollArea.sizePolicy().hasHeightForWidth())
        self.scrollArea.setSizePolicy(sizePolicy)
        self.scrollArea.setFrameShape(QFrame.NoFrame)
        self.scrollArea.setLineWidth(0)
        self.scrollArea.setWidgetResizable(True)
        self.scrollArea.setObjectName("scrollArea")
        self.scrollAreaWidgetContents = QWidget()
        self.scrollAreaWidgetContents.setGeometry(QRect(0, 0, 810, 494))
        self.scrollAreaWidgetContents.setObjectName("scrollAreaWidgetContents")
        self.verticalLayout_3 = QVBoxLayout(self.scrollAreaWidgetContents)
        self.verticalLayout_3.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout_3.setObjectName("verticalLayout_3")
        self.stack = QStackedWidget(self.scrollAreaWidgetContents)
        sizePolicy = QSizePolicy(QSizePolicy.Preferred, QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(
            self.stack.sizePolicy().hasHeightForWidth())
        self.stack.setSizePolicy(sizePolicy)
        self.stack.setObjectName("stack")
        self.page = QWidget()
        self.page.setObjectName("page")
        self.stack.addWidget(self.page)
        self.page_2 = QWidget()
        self.page_2.setObjectName("page_2")
        self.stack.addWidget(self.page_2)
        self.verticalLayout_3.addWidget(self.stack)
        self.scrollArea.setWidget(self.scrollAreaWidgetContents)
        self.gridLayout.addWidget(self.scrollArea, 1, 1, 1, 1)
        self.buttonBox = QDialogButtonBox(self)
        self.buttonBox.setOrientation(Qt.Horizontal)
        self.buttonBox.setStandardButtons(QDialogButtonBox.Cancel
                                          | QDialogButtonBox.Ok
                                          | QDialogButtonBox.RestoreDefaults)
        self.buttonBox.setObjectName("buttonBox")
        self.gridLayout.addWidget(self.buttonBox, 3, 1, 1, 1)
        self.help = QTextEdit(self)
        sizePolicy = QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(
            self.help.sizePolicy().hasHeightForWidth())
        self.help.setSizePolicy(sizePolicy)
        self.help.setMaximumHeight(80)
        self.help.setObjectName("help")
        self.gridLayout.addWidget(self.help, 2, 1, 1, 1)
        self.input_label.setBuddy(self.input_formats)
        self.label_2.setBuddy(self.output_formats)
        self.input_label.setText(_("&Input format:"))
        self.opt_individual_saved_settings.setText(
            _("Use &saved conversion settings for individual books"))
        self.label_2.setText(_("&Output format:"))

        self.buttonBox.accepted.connect(self.accept)
        self.buttonBox.rejected.connect(self.reject)

    def sizeHint(self):
        desktop = QCoreApplication.instance().desktop()
        geom = desktop.availableGeometry(self)
        nh, nw = max(300, geom.height() - 100), max(400, geom.width() - 70)
        return QSize(nw, nh)

    def restore_defaults(self):
        delete_specifics(self.db, self.book_id)
        self.setup_pipeline()

    @property
    def input_format(self):
        return unicode_type(self.input_formats.currentText()).lower()

    @property
    def output_format(self):
        return unicode_type(self.output_formats.currentText()).lower()

    @property
    def manually_fine_tune_toc(self):
        for i in range(self.stack.count()):
            w = self.stack.widget(i)
            if hasattr(w, 'manually_fine_tune_toc'):
                return w.manually_fine_tune_toc.isChecked()

    def setup_pipeline(self, *args):
        oidx = self.groups.currentIndex().row()
        input_format = self.input_format
        output_format = self.output_format
        self.plumber = create_dummy_plumber(input_format, output_format)

        def widget_factory(cls):
            return cls(self.stack, self.plumber.get_option_by_name,
                       self.plumber.get_option_help, self.db, self.book_id)

        self.mw = widget_factory(MetadataWidget)
        self.setWindowTitle(
            _('Convert') + ' ' + unicode_type(self.mw.title.text()))
        lf = widget_factory(LookAndFeelWidget)
        hw = widget_factory(HeuristicsWidget)
        sr = widget_factory(SearchAndReplaceWidget)
        ps = widget_factory(PageSetupWidget)
        sd = widget_factory(StructureDetectionWidget)
        toc = widget_factory(TOCWidget)
        from calibre.gui2.actions.toc_edit import SUPPORTED
        toc.manually_fine_tune_toc.setVisible(
            output_format.upper() in SUPPORTED)
        debug = widget_factory(DebugWidget)

        output_widget = self.plumber.output_plugin.gui_configuration_widget(
            self.stack, self.plumber.get_option_by_name,
            self.plumber.get_option_help, self.db, self.book_id)
        input_widget = self.plumber.input_plugin.gui_configuration_widget(
            self.stack, self.plumber.get_option_by_name,
            self.plumber.get_option_help, self.db, self.book_id)
        while True:
            c = self.stack.currentWidget()
            if not c:
                break
            self.stack.removeWidget(c)

        widgets = [self.mw, lf, hw, ps, sd, toc, sr]
        if input_widget is not None:
            widgets.append(input_widget)
        if output_widget is not None:
            widgets.append(output_widget)
        widgets.append(debug)
        for w in widgets:
            self.stack.addWidget(w)
            w.set_help_signal.connect(self.help.setPlainText)

        self._groups_model = GroupModel(widgets)
        self.groups.setModel(self._groups_model)

        idx = oidx if -1 < oidx < self._groups_model.rowCount() else 0
        self.groups.setCurrentIndex(self._groups_model.index(idx))
        self.stack.setCurrentIndex(idx)
        try:
            shutil.rmtree(self.plumber.archive_input_tdir, ignore_errors=True)
        except:
            pass

    def setup_input_output_formats(self, db, book_id, preferred_input_format,
                                   preferred_output_format):
        if preferred_output_format:
            preferred_output_format = preferred_output_format.upper()
        output_formats = get_output_formats(preferred_output_format)
        input_format, input_formats = get_input_format_for_book(
            db, book_id, preferred_input_format)
        preferred_output_format = preferred_output_format if \
            preferred_output_format in output_formats else \
            sort_formats_by_preference(output_formats,
                    [prefs['output_format']])[0]
        self.input_formats.addItems(
            (unicode_type(x.upper()) for x in input_formats))
        self.output_formats.addItems(
            (unicode_type(x.upper()) for x in output_formats))
        self.input_formats.setCurrentIndex(input_formats.index(input_format))
        self.output_formats.setCurrentIndex(
            output_formats.index(preferred_output_format))

    def show_pane(self, index):
        self.stack.setCurrentIndex(index.row())

    def accept(self):
        recs = GuiRecommendations()
        for w in self._groups_model.widgets:
            if not w.pre_commit_check():
                return
            x = w.commit(save_defaults=False)
            recs.update(x)
        self.opf_file, self.cover_file = self.mw.opf_file, self.mw.cover_file
        self._recommendations = recs
        if self.db is not None:
            recs['gui_preferred_input_format'] = self.input_format
            save_specifics(self.db, self.book_id, recs)
        self.break_cycles()
        QDialog.accept(self)

    def reject(self):
        self.break_cycles()
        QDialog.reject(self)

    def done(self, r):
        if self.isVisible():
            gprefs['convert_single_dialog_geom'] = \
                bytearray(self.saveGeometry())
        return QDialog.done(self, r)

    def break_cycles(self):
        for i in range(self.stack.count()):
            w = self.stack.widget(i)
            w.break_cycles()

    @property
    def recommendations(self):
        recs = [(k, v, OptionRecommendation.HIGH)
                for k, v in self._recommendations.items()]
        return recs

    def show_group_help(self, index):
        widget = self._groups_model.widgets[index.row()]
        self.help.setPlainText(widget.HELP)
Ejemplo n.º 2
0
class ConfigWidget(QWidget):

    # GUI definition
    def __init__(self):
        QWidget.__init__(self)
        self.l = QVBoxLayout()
        self.setLayout(self.l)

        self.ll = QHBoxLayout()
        self.l.addLayout(self.ll)

        self.label_exe = QLabel(_('&Prince executable:'))
        self.ll.addWidget(self.label_exe)

        self.exe = QLineEdit(self)
        self.exe.setText(prefs['prince_exe'])
        self.exe.setToolTip(_('<qt>Executable for the Prince program (command-line interface)</qt>'))
        self.ll.addWidget(self.exe)
        self.label_exe.setBuddy(self.exe)

        self.browse = QPushButton(_('&Browse') + '...', self)
        self.browse.setToolTip(_('<qt>Search the Prince executable in your computer</qt>'))
        self.browse.clicked.connect(self.select_exe)
        self.ll.addWidget(self.browse)

        self.lll = QHBoxLayout()
        self.l.addLayout(self.lll)

        self.label_fmts = QLabel(_('Preferred &formats:'))
        self.lll.addWidget(self.label_fmts)

        self.fmts = QLineEdit(self)
        self.fmts.setText(','.join(prefs['formats']))
        self.fmts.setToolTip(_('<qt>Comma-separated list of preferred formats to use as source, the first that matches will be used</qt>'))
        self.lll.addWidget(self.fmts)
        self.label_fmts.setBuddy(self.fmts)

        self.add_book = QCheckBox(_('&Add PDF to the book record'))
        self.add_book.setToolTip(_('<qt>Add the converted PDF to the selected book record</qt>'))
        self.add_book.setChecked(prefs['add_book'])
        self.l.addWidget(self.add_book)

        self.show_css = QCheckBox(_('&Show CSS in the Convert dialog'))
        self.show_css.setToolTip(_('<qt>Show by default the stylesheets in the Convert dialog</qt>'))
        self.show_css.setChecked(prefs['show_CSS'])
        self.l.addWidget(self.show_css)

        self.css_layout = QVBoxLayout()

        self.llll = QHBoxLayout()
        self.css_layout.addLayout(self.llll)

        self.css_list = QComboBox()
        self.css_list.setToolTip(_('<qt>List of custom stylesheets defined. Select one to edit</qt>'))
        self.css_list.setSizeAdjustPolicy(QComboBox.AdjustToContents)
        self.CSS_list = prefs['custom_CSS_list'].copy()
        self.default_CSS = prefs['default_CSS']
        if 'custom_CSS' in prefs:
            self.CSS_list[_('old')] = prefs['custom_CSS']
            self.default_CSS = _('old')
        if self.default_CSS not in self.CSS_list:
            self.default_CSS = sorted(self.CSS_list, key=lambda x: x.lower())[0]
        for key in sorted(self.CSS_list, key=lambda x: x.lower()):
            self.css_list.addItem(key, key)
        self.css_list.setCurrentIndex(self.css_list.findText(self.default_CSS))
        self.css_list.currentIndexChanged.connect(self.set_css)
        self.llll.addWidget(self.css_list)

        self.css_rename = QPushButton(_('Re&name'))
        self.css_rename.setToolTip(_('<qt>Rename the current stylesheet to the name on the right</qt>'))
        self.css_rename.clicked.connect(self.rename_css)
        self.css_rename.setEnabled(False)
        self.llll.addWidget(self.css_rename)

        self.css_name = QLineEdit(self)
        self.css_name.setToolTip(_('<qt>Name for the new or renamed stylesheet</qt>'))
        self.css_name.setText(self.css_list.currentText())
        self.css_name.textChanged.connect(self.check_names)
        self.llll.addWidget(self.css_name)

        self.css_add = QPushButton(_('A&dd'))
        self.css_add.setToolTip(_('<qt>Add a new empty stylesheet with the name on the left</qt>'))
        self.css_add.clicked.connect(self.add_css)
        self.css_add.setEnabled(False)
        self.llll.addWidget(self.css_add)

        self.css_remove = QPushButton(_('Re&move'))
        self.css_remove.setToolTip(_('<qt>Remove the current stylesheet</qt>'))
        self.css_remove.clicked.connect(self.remove_css)
        self.llll.addWidget(self.css_remove)

        self.css = TextEditWithTooltip()
        self.css.setLineWrapMode(TextEditWithTooltip.NoWrap)
        self.css.load_text(self.CSS_list[unicode(self.css_list.currentText())],'css')
        self.css.setToolTip(_('<qt>Custom stylesheet that will be applied, if selected, to all Prince PDF conversions</qt>'))
        self.css_layout.addWidget(self.css)

        self.css_templates = QLabel(_('Book metadata can be used in the stylesheet. Anything between %(s1)s and %(s2)s will be processed as a calibre template. For instance, %(s3)s in the stylesheet will be replaced with the book title in the conversion.') % \
          {'s1':'<span style="font-family:monospace ; font-weight:bold">@{@</span>', \
           's2':'<span style="font-family:monospace ; font-weight:bold">@}@</span>', \
           's3':'<span style="font-family:monospace ; font-weight:bold">@{@{title}@}@</span>'})
        self.css_templates.setWordWrap(True)
        self.css_layout.addWidget(self.css_templates)

        self.css_box = QGroupBox(_('&Custom CSS:'))
        self.css_box.setLayout(self.css_layout)
        self.l.addWidget(self.css_box)

        self.lllll = QHBoxLayout()
        self.lllll.setAlignment(Qt.AlignLeft)
        self.l.addLayout(self.lllll)

        self.defaults = QPushButton(_('&Restore defaults'))
        self.defaults.setToolTip(_('<qt>Restore the default settings</qt>'))
        self.defaults.clicked.connect(self.restore_defaults)
        self.lllll.addWidget(self.defaults, alignment=Qt.AlignLeft)

        self.warning = QLabel(_('<b>Warning</b>: Deletes modified stylesheets'))
        self.lllll.addWidget(self.warning)

        self.adjustSize()

    def select_exe(self):
        '''
        Create a dialog to select the Prince executable
        '''
        dialog = QFileDialog()
        dialog.setFileMode(QFileDialog.ExistingFile)
        filename = dialog.getOpenFileName(self, _('Select Prince executable'), '', '')
        if filename:
            try:
                self.exe.setText(filename)
            except(TypeError):
                self.exe.setText(filename[0])

    def restore_defaults(self):
        '''
        Restore the default settings
        '''
        self.exe.setText(prefs.defaults['prince_exe'])
        self.fmts.setText(','.join(prefs.defaults['formats']).lower())
        self.show_css.setChecked(prefs.defaults['show_CSS'])
        self.add_book.setChecked(prefs.defaults['add_book'])
        self.css_list.currentIndexChanged.disconnect()
        self.css_list.clear()
        self.CSS_list = prefs.defaults['custom_CSS_list'].copy()
        self.default_CSS = prefs.defaults['default_CSS']
        for key in sorted(self.CSS_list, key=lambda x: x.lower()):
            self.css_list.addItem(key, key)
        self.css_list.setCurrentIndex(self.css_list.findText(self.default_CSS))
        self.css_name.setText(self.default_CSS)
        self.css.load_text(self.CSS_list[unicode(self.css_list.currentText())],'css')
        self.css_list.currentIndexChanged.connect(self.set_css)

    def save_settings(self):
        '''
        Save the current settings
        '''
        prefs['prince_exe'] = unicode(self.exe.text())
        prefs['formats'] = unicode(self.fmts.text().lower()).split(',')
        prefs['show_CSS'] = self.show_css.isChecked()
        prefs['add_book'] = self.add_book.isChecked()
        self.set_css()
        prefs['default_CSS'] = self.default_CSS
        prefs['custom_CSS_list'] = self.CSS_list.copy()
        if 'custom_CSS' in prefs:
            del prefs['custom_CSS']

    def set_css(self):
        '''
        Fill the CSS text box with the selected stylesheet
        '''
        self.CSS_list[self.default_CSS] = unicode(self.css.toPlainText())
        self.default_CSS = unicode(self.css_list.currentText())
        self.css.load_text(self.CSS_list[self.default_CSS],'css')
        self.css_name.setText(self.css_list.currentText())

    def add_css(self):
        '''
        Add a new stylesheet
        '''
        from calibre.gui2 import error_dialog

        name = unicode(self.css_name.text())
        if name in self.CSS_list:
            error_dialog(self, _('Cannot add stylesheet'), _('A stylesheet with the name "%s" is already defined, use a different name.') % name, show=True)
        else:
            self.CSS_list[name] = ''
            self.css_list.addItem(name, name)
            self.css_list.setCurrentIndex(self.css_list.findText(name))
            self.css_add.setEnabled(False)
            self.css_rename.setEnabled(False)

    def remove_css(self):
        '''
        Remove an existing stylesheet
        '''
        from calibre.gui2 import error_dialog

        if (self.css_list.count() > 1):
            self.css_list.currentIndexChanged.disconnect()
            self.css_list.removeItem(self.css_list.currentIndex())
            del self.CSS_list[self.default_CSS]
            self.default_CSS = unicode(self.css_list.currentText())
            self.css.load_text(self.CSS_list[self.default_CSS],'css')
            self.css_list.currentIndexChanged.connect(self.set_css)
            self.css_name.setText(self.css_list.currentText())
        else:
            error_dialog(self, _('Cannot delete the last stylesheet'), _('The last stylesheet cannot be removed. You can rename it and/or remove its contents.'), show=True)

    def rename_css(self):
        '''
        Rename a stylesheet
        '''
        from calibre.gui2 import error_dialog

        name = unicode(self.css_name.text())
        if name in self.CSS_list:
            error_dialog(self, _('Cannot rename stylesheet'), _('A stylesheet with the name "%s" is already defined, use a different name.') % name, show=True)
        else:
            self.CSS_list[name] = self.CSS_list.pop(self.default_CSS)
            self.css_list.setItemText(self.css_list.currentIndex(),name)
            self.default_CSS = name

    def check_names(self, text):
        name = unicode(text)
        if name in self.CSS_list:
            self.css_add.setEnabled(False)
            self.css_rename.setEnabled(False)
        else:
            self.css_add.setEnabled(True)
            self.css_rename.setEnabled(True)
Ejemplo n.º 3
0
class ConfigWidget(QWidget):

    # GUI definition
    def __init__(self):
        QWidget.__init__(self)
        self.l = QVBoxLayout()
        self.setLayout(self.l)

        self.ll = QHBoxLayout()
        self.l.addLayout(self.ll)

        self.label_exe = QLabel(_('&Prince executable:'))
        self.ll.addWidget(self.label_exe)

        self.exe = QLineEdit(self)
        self.exe.setText(prefs['prince_exe'])
        self.exe.setToolTip(
            _('<qt>Executable for the Prince program (command-line interface)</qt>'
              ))
        self.ll.addWidget(self.exe)
        self.label_exe.setBuddy(self.exe)

        self.browse = QPushButton(_('&Browse') + '...', self)
        self.browse.setToolTip(
            _('<qt>Search the Prince executable in your computer</qt>'))
        self.browse.clicked.connect(self.select_exe)
        self.ll.addWidget(self.browse)

        self.lll = QHBoxLayout()
        self.l.addLayout(self.lll)

        self.label_fmts = QLabel(_('Preferred &formats:'))
        self.lll.addWidget(self.label_fmts)

        self.fmts = QLineEdit(self)
        self.fmts.setText(','.join(prefs['formats']))
        self.fmts.setToolTip(
            _('<qt>Comma-separated list of preferred formats to use as source, the first that matches will be used</qt>'
              ))
        self.lll.addWidget(self.fmts)
        self.label_fmts.setBuddy(self.fmts)

        self.add_book = QCheckBox(_('&Add PDF to the book record'))
        self.add_book.setToolTip(
            _('<qt>Add the converted PDF to the selected book record</qt>'))
        self.add_book.setChecked(prefs['add_book'])
        self.l.addWidget(self.add_book)

        self.show_css = QCheckBox(_('&Show CSS in the Convert dialog'))
        self.show_css.setToolTip(
            _('<qt>Show by default the styles in the Convert dialog</qt>'))
        self.show_css.setChecked(prefs['show_CSS'])
        self.l.addWidget(self.show_css)

        self.css_layout = QVBoxLayout()

        self.llll = QHBoxLayout()
        self.css_layout.addLayout(self.llll)

        self.css_list = QComboBox()
        self.css_list.setToolTip(
            _('<qt>List of custom styles defined. Select one to edit</qt>'))
        self.css_list.setSizeAdjustPolicy(QComboBox.AdjustToContents)
        self.CSS_list = prefs['custom_CSS_list'].copy()
        self.default_CSS = prefs['default_CSS']
        if 'custom_CSS' in prefs:
            self.CSS_list[_('old')] = prefs['custom_CSS']
            self.default_CSS = _('old')
        if self.default_CSS not in self.CSS_list:
            self.default_CSS = sorted(self.CSS_list,
                                      key=lambda x: x.lower())[0]
        for key in sorted(self.CSS_list, key=lambda x: x.lower()):
            self.css_list.addItem(key, key)
        self.css_list.setCurrentIndex(self.css_list.findText(self.default_CSS))
        self.css_list.currentIndexChanged.connect(self.set_css)
        self.llll.addWidget(self.css_list)

        self.css_rename = QPushButton(_('Re&name'))
        self.css_rename.setToolTip(
            _('<qt>Rename the current style to the name on the right</qt>'))
        self.css_rename.clicked.connect(self.rename_css)
        self.css_rename.setEnabled(False)
        self.llll.addWidget(self.css_rename)

        self.css_name = QLineEdit(self)
        self.css_name.setToolTip(
            _('<qt>Name for the new or renamed style</qt>'))
        self.css_name.setText(self.css_list.currentText())
        self.css_name.textChanged.connect(self.check_names)
        self.llll.addWidget(self.css_name)

        self.css_add = QPushButton(_('A&dd'))
        self.css_add.setToolTip(
            _('<qt>Add a new empty style with the name on the left</qt>'))
        self.css_add.clicked.connect(self.add_css)
        self.css_add.setEnabled(False)
        self.llll.addWidget(self.css_add)

        self.css_remove = QPushButton(_('Re&move'))
        self.css_remove.setToolTip(_('<qt>Remove the current style</qt>'))
        self.css_remove.clicked.connect(self.remove_css)
        self.llll.addWidget(self.css_remove)

        self.llll_ = QHBoxLayout()
        self.css_layout.addLayout(self.llll_)

        self.label_args = QLabel(_('Addi&tional command-line arguments:'))
        self.llll_.addWidget(self.label_args)

        self.args = QLineEdit(self)
        # Make sure custom_CSS_list and custom_args_list have the same keys
        if 'custom_args_list' in prefs:
            self.args_list = prefs['custom_args_list'].copy()
        else:
            self.args_list = {}
        for key in self.CSS_list:
            if not key in self.args_list:
                self.args_list[key] = ''
        for key in self.args_list:
            if not key in self.CSS_list:
                del self.args_list[key]
        self.args.setText(self.args_list[unicode(self.css_list.currentText())])
        self.args.setToolTip(
            _('<qt>Additional command-line arguments used in conversions with this style</qt>'
              ))
        self.llll_.addWidget(self.args)
        self.label_args.setBuddy(self.args)

        self.css = TextEditWithTooltip(self, expected_geometry=(80, 20))
        self.css.setLineWrapMode(TextEditWithTooltip.NoWrap)
        self.css.load_text(self.CSS_list[unicode(self.css_list.currentText())],
                           'css')
        self.css.setToolTip(
            _('<qt>Custom stylesheet that will be applied, if selected, to all Prince PDF conversions</qt>'
              ))
        self.css_layout.addWidget(self.css)

        self.css_templates = QLabel(_('Book metadata can be used in the stylesheet. Anything between %(s1)s and %(s2)s will be processed as a calibre template. For instance, %(s3)s in the stylesheet will be replaced with the book title in the conversion.') % \
          {'s1':'<span style="font-family:monospace ; font-weight:bold">@{@</span>', \
           's2':'<span style="font-family:monospace ; font-weight:bold">@}@</span>', \
           's3':'<span style="font-family:monospace ; font-weight:bold">@{@{title}@}@</span>'})
        self.css_templates.setWordWrap(True)
        self.css_layout.addWidget(self.css_templates)

        self.css_box = QGroupBox(_('&Custom styles:'))
        self.css_box.setLayout(self.css_layout)
        self.l.addWidget(self.css_box)

        self.lllll = QHBoxLayout()
        self.lllll.setAlignment(Qt.AlignLeft)
        self.l.addLayout(self.lllll)

        self.defaults = QPushButton(_('&Restore defaults'))
        self.defaults.setToolTip(_('<qt>Restore the default settings</qt>'))
        self.defaults.clicked.connect(self.restore_defaults)
        self.lllll.addWidget(self.defaults, alignment=Qt.AlignLeft)

        self.warning = QLabel(_('<b>Warning</b>: Deletes modified styles'))
        self.lllll.addWidget(self.warning)

        self.adjustSize()

    def select_exe(self):
        '''
        Create a dialog to select the Prince executable
        '''
        dialog = QFileDialog()
        dialog.setFileMode(QFileDialog.ExistingFile)
        filename = dialog.getOpenFileName(self, _('Select Prince executable'),
                                          '', '')
        if filename:
            try:
                self.exe.setText(filename)
            except (TypeError):
                self.exe.setText(filename[0])

    def restore_defaults(self):
        '''
        Restore the default settings
        '''
        self.exe.setText(prefs.defaults['prince_exe'])
        self.fmts.setText(','.join(prefs.defaults['formats']).lower())
        self.show_css.setChecked(prefs.defaults['show_CSS'])
        self.add_book.setChecked(prefs.defaults['add_book'])
        self.css_list.currentIndexChanged.disconnect()
        self.css_list.clear()
        self.CSS_list = prefs.defaults['custom_CSS_list'].copy()
        self.args_list = prefs.defaults['custom_args_list'].copy()
        self.default_CSS = prefs.defaults['default_CSS']
        for key in sorted(self.CSS_list, key=lambda x: x.lower()):
            self.css_list.addItem(key, key)
        self.css_list.setCurrentIndex(self.css_list.findText(self.default_CSS))
        self.css_name.setText(self.default_CSS)
        self.css.load_text(self.CSS_list[unicode(self.css_list.currentText())],
                           'css')
        self.args.setText(self.args_list[unicode(self.css_list.currentText())])
        self.css_list.currentIndexChanged.connect(self.set_css)

    def save_settings(self):
        '''
        Save the current settings
        '''
        prefs['prince_exe'] = unicode(self.exe.text())
        prefs['formats'] = unicode(self.fmts.text().lower()).split(',')
        prefs['show_CSS'] = self.show_css.isChecked()
        prefs['add_book'] = self.add_book.isChecked()
        self.set_css()
        prefs['default_CSS'] = self.default_CSS
        prefs['custom_CSS_list'] = self.CSS_list.copy()
        prefs['custom_args_list'] = self.args_list.copy()
        if 'custom_CSS' in prefs:
            del prefs['custom_CSS']

    def set_css(self):
        '''
        Fill the CSS text box with the selected stylesheet, and similarly for command-line arguments
        '''
        self.CSS_list[self.default_CSS] = unicode(self.css.toPlainText())
        self.args_list[self.default_CSS] = unicode(self.args.text())
        self.default_CSS = unicode(self.css_list.currentText())
        self.css.load_text(self.CSS_list[self.default_CSS], 'css')
        self.args.setText(self.args_list[self.default_CSS])
        self.css_name.setText(self.css_list.currentText())

    def add_css(self):
        '''
        Add a new style
        '''
        from calibre.gui2 import error_dialog

        name = unicode(self.css_name.text())
        if name in self.CSS_list:
            error_dialog(
                self,
                _('Cannot add style'),
                _('A style with the name "%s" is already defined, use a different name.'
                  ) % name,
                show=True)
        else:
            self.CSS_list[name] = ''
            self.args_list[name] = ''
            self.css_list.addItem(name, name)
            self.css_list.setCurrentIndex(self.css_list.findText(name))
            self.css_add.setEnabled(False)
            self.css_rename.setEnabled(False)

    def remove_css(self):
        '''
        Remove an existing style
        '''
        from calibre.gui2 import error_dialog

        if (self.css_list.count() > 1):
            self.css_list.currentIndexChanged.disconnect()
            self.css_list.removeItem(self.css_list.currentIndex())
            del self.CSS_list[self.default_CSS]
            del self.args_list[self.default_CSS]
            self.default_CSS = unicode(self.css_list.currentText())
            self.css.load_text(self.CSS_list[self.default_CSS], 'css')
            self.args.setText(self.args_list[self.default_CSS])
            self.css_list.currentIndexChanged.connect(self.set_css)
            self.css_name.setText(self.css_list.currentText())
        else:
            error_dialog(
                self,
                _('Cannot delete the last style'),
                _('The last style cannot be removed. You can rename it and/or remove its contents.'
                  ),
                show=True)

    def rename_css(self):
        '''
        Rename a style
        '''
        from calibre.gui2 import error_dialog

        name = unicode(self.css_name.text())
        if name in self.CSS_list:
            error_dialog(
                self,
                _('Cannot rename style'),
                _('A style with the name "%s" is already defined, use a different name.'
                  ) % name,
                show=True)
        else:
            self.CSS_list[name] = self.CSS_list.pop(self.default_CSS)
            self.args_list[name] = self.args_list.pop(self.default_CSS)
            self.css_list.setItemText(self.css_list.currentIndex(), name)
            self.default_CSS = name

    def check_names(self, text):
        name = unicode(text)
        if name in self.CSS_list:
            self.css_add.setEnabled(False)
            self.css_rename.setEnabled(False)
        else:
            self.css_add.setEnabled(True)
            self.css_rename.setEnabled(True)