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conversion.py

#!/usr/bin/env python
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai

__license__   = 'GPL v3'
__copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
__docformat__ = 'restructuredtext en'

from PyQt4.Qt import QIcon, Qt, QStringListModel, QVariant

from calibre.gui2.preferences import ConfigWidgetBase, test_widget, AbortCommit
from calibre.ebooks.conversion.plumber import Plumber
from calibre.utils.logging import Log
from calibre.gui2.preferences.conversion_ui import Ui_Form
from calibre.gui2.convert.look_and_feel import LookAndFeelWidget
from calibre.gui2.convert.page_setup import PageSetupWidget
from calibre.gui2.convert.structure_detection import StructureDetectionWidget
from calibre.gui2.convert.toc import TOCWidget
from calibre.customize.ui import input_format_plugins, output_format_plugins
from calibre.gui2.convert import config_widget_for_input_plugin

class Model(QStringListModel):

    def __init__(self, widgets):
        QStringListModel.__init__(self)
        self.widgets = widgets
        self.setStringList([w.TITLE for w in widgets])

    def data(self, index, role):
        if role == Qt.DecorationRole:
            w = self.widgets[index.row()]
            if w.ICON:
                return QVariant(QIcon(w.ICON))
        return QStringListModel.data(self, index, role)

class Base(ConfigWidgetBase, Ui_Form):

    restore_defaults_desc = _('Restore settings to default values. '
            'Only settings for the currently selected section '
            'are restored.')

    def genesis(self, gui):
        log = Log()
        log.outputs = []

        self.plumber = Plumber('dummy.epub', 'dummy.epub', log, dummy=True,
                merge_plugin_recs=False)

        def widget_factory(cls):
            return cls(self, self.plumber.get_option_by_name,
                self.plumber.get_option_help, None, None)

        self.load_conversion_widgets()
        widgets = list(map(widget_factory, self.conversion_widgets))
        self.model = Model(widgets)
        self.list.setModel(self.model)

        for w in widgets:
            w.changed_signal.connect(self.changed_signal)
            self.stack.addWidget(w)

        self.list.currentChanged = self.category_current_changed
        self.list.setCurrentIndex(self.model.index(0))

    def initialize(self):
        ConfigWidgetBase.initialize(self)

    def restore_defaults(self):
        ConfigWidgetBase.restore_defaults(self)
        self.stack.currentWidget().restore_defaults(self.plumber.get_option_by_name)
        self.changed_signal.emit()

    def commit(self):
        for widget in self.model.widgets:
            if not widget.pre_commit_check():
                raise AbortCommit('abort')
            widget.commit(save_defaults=True)
        return ConfigWidgetBase.commit(self)

    def category_current_changed(self, n, p):
        self.stack.setCurrentIndex(n.row())

class CommonOptions(Base):

    def load_conversion_widgets(self):
        self.conversion_widgets = [LookAndFeelWidget, PageSetupWidget,
                StructureDetectionWidget, TOCWidget]

class InputOptions(Base):

    def load_conversion_widgets(self):
        self.conversion_widgets = []
        for plugin in input_format_plugins():
            pw = config_widget_for_input_plugin(plugin)
            if pw is not None:
                self.conversion_widgets.append(pw)

class OutputOptions(Base):

    def load_conversion_widgets(self):
        self.conversion_widgets = []
        for plugin in output_format_plugins():
            name = plugin.name.lower().replace(' ', '_')
            try:
                output_widget = __import__('calibre.gui2.convert.'+name,
                        fromlist=[1])
                pw = output_widget.PluginWidget
                self.conversion_widgets.append(pw)
            except ImportError:
                continue

if __name__ == '__main__':
    from PyQt4.Qt import QApplication
    app = QApplication([])
    #test_widget('Conversion', 'Input Options')
    test_widget('Conversion', 'Common Options')
    #test_widget('Conversion', 'Output Options')


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