Start work on integrating plugin updater into calibre

src/calibre/customize/builtins.py

@@ -867,13 +867,20 @@ class ActionStore(InterfaceActionBase):
         from calibre.gui2.store.config.store import save_settings as save
         save(config_widget)
 
+class ActionPluginUpdates(InterfaceActionBase):
+    name = 'Plugin Updates'
+    author = 'Grant Drake'
+    description = 'Queries the MobileRead forums for updates to plugins to install'
+    actual_plugin = 'calibre.gui2.actions.plugin_updates:PluginUpdatesAction'
+
 plugins += [ActionAdd, ActionFetchAnnotations, ActionGenerateCatalog,
         ActionConvert, ActionDelete, ActionEditMetadata, ActionView,
         ActionFetchNews, ActionSaveToDisk, ActionShowBookDetails,
         ActionRestart, ActionOpenFolder, ActionConnectShare,
         ActionSendToDevice, ActionHelp, ActionPreferences, ActionSimilarBooks,
         ActionAddToLibrary, ActionEditCollections, ActionChooseLibrary,
-        ActionCopyToLibrary, ActionTweakEpub, ActionNextMatch, ActionStore]
+        ActionCopyToLibrary, ActionTweakEpub, ActionNextMatch, ActionStore,
+        ActionPluginUpdates]
 
 # }}}
 

src/calibre/gui2/actions/plugin_updates.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python
+# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__   = 'GPL v3'
+__copyright__ = '2011, Grant Drake <grant.drake@gmail.com>'
+__docformat__ = 'restructuredtext en'
+
+from PyQt4.Qt import QApplication, Qt, QIcon
+from calibre.gui2.actions import InterfaceAction
+from calibre.gui2.dialogs.plugin_updater import (PluginUpdaterDialog,
+                                                 FILTER_ALL, FILTER_UPDATE_AVAILABLE)
+
+class PluginUpdatesAction(InterfaceAction):
+
+    name = 'Plugin Updates'
+    action_spec = (_('Plugin Updates'), None, None, None)
+    action_type = 'current'
+
+    def genesis(self):
+        self.qaction.setIcon(QIcon(I('plugins/plugin_updater.png')))
+        self.qaction.triggered.connect(self.check_for_plugin_updates)
+
+    def check_for_plugin_updates(self):
+        # Get the user to choose a plugin to install
+        initial_filter = FILTER_UPDATE_AVAILABLE
+        mods = QApplication.keyboardModifiers()
+        if mods & Qt.ControlModifier or mods & Qt.ShiftModifier:
+            initial_filter = FILTER_ALL
+
+        d = PluginUpdaterDialog(self.gui, initial_filter=initial_filter)
+        d.exec_()

src/calibre/gui2/dialogs/plugin_updater.py

@@ -0,0 +1,866 @@
+#!/usr/bin/env python
+# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__   = 'GPL v3'
+__copyright__ = '2011, Grant Drake <grant.drake@gmail.com>'
+__docformat__ = 'restructuredtext en'
+
+import re, datetime, traceback
+from lxml import html
+from PyQt4.Qt import (Qt, QUrl, QFrame, QVBoxLayout, QLabel, QBrush, QTextEdit,
+                      QComboBox, QAbstractItemView, QHBoxLayout, QDialogButtonBox,
+                      QAbstractTableModel, QVariant, QTableView, QModelIndex,
+                      QSortFilterProxyModel, pyqtSignal, QAction, QIcon, QDialog,
+                      QFont, QPixmap, QSize)
+from PyQt4 import QtCore
+from calibre import browser, prints
+from calibre.constants import numeric_version, iswindows, isosx, DEBUG
+from calibre.customize.ui import (initialized_plugins, is_disabled, remove_plugin,
+                                  add_plugin, enable_plugin, disable_plugin, NameConflict)
+from calibre.gui2 import error_dialog, question_dialog, info_dialog, NONE, open_url, gprefs
+from calibre.gui2.preferences.plugins import ConfigWidget
+from calibre.utils.date import UNDEFINED_DATE, format_date
+
+
+MR_URL = 'http://www.mobileread.com/forums/'
+MR_INDEX_URL = MR_URL + 'showpost.php?p=1362767&postcount=1'
+
+FILTER_ALL = 0
+FILTER_INSTALLED = 1
+FILTER_UPDATE_AVAILABLE = 2
+FILTER_NOT_INSTALLED = 3
+
+def get_plugin_updates_available():
+    '''
+    API exposed to read whether there are updates available for any
+    of the installed user plugins.
+    Returns None if no updates found
+    Returns list(DisplayPlugin) of plugins installed that have a new version
+    '''
+    display_plugins = read_available_plugins()
+    if display_plugins:
+        update_plugins = filter(filter_upgradeable_plugins, display_plugins)
+        if len(update_plugins) > 0:
+            return update_plugins
+    return None
+
+def filter_upgradeable_plugins(display_plugin):
+    return display_plugin.is_upgrade_available()
+
+def filter_not_installed_plugins(display_plugin):
+    return not display_plugin.is_installed()
+
+def read_available_plugins():
+    display_plugins = []
+    br = browser()
+    br.set_handle_gzip(True)
+    try:
+        raw = br.open_novisit(MR_INDEX_URL).read()
+        if not raw:
+            return
+    except:
+        traceback.print_exc()
+        return
+    raw = raw.decode('utf-8', errors='replace')
+    root = html.fromstring(raw)
+    list_nodes = root.xpath('//div[@id="post_message_1362767"]/ul/li')
+    # Add our deprecated plugins which are nested in a grey span
+    list_nodes.extend(root.xpath('//div[@id="post_message_1362767"]/span/ul/li'))
+    for list_node in list_nodes:
+        try:
+            display_plugin = DisplayPlugin(list_node)
+            get_installed_plugin_status(display_plugin)
+            display_plugins.append(display_plugin)
+        except:
+            if DEBUG:
+                prints('======= MobileRead Parse Error =======')
+                traceback.print_exc()
+                prints(html.tostring(list_node))
+    display_plugins = sorted(display_plugins, key=lambda k: k.name)
+    return display_plugins
+
+def get_installed_plugin_status(display_plugin):
+    display_plugin.installed_version = None
+    display_plugin.plugin = None
+    for plugin in initialized_plugins():
+        if plugin.name == display_plugin.name:
+            display_plugin.plugin = plugin
+            display_plugin.installed_version = plugin.version
+            break
+    if display_plugin.uninstall_plugins:
+        # Plugin requires a specific plugin name to be uninstalled first
+        # This could occur when a plugin is renamed (Kindle Collections)
+        # or multiple plugins deprecated into a newly named one.
+        # Check whether user has the previous version(s) installed
+        plugins_to_remove = list(display_plugin.uninstall_plugins)
+        for plugin_to_uninstall in plugins_to_remove:
+            found = False
+            for plugin in initialized_plugins():
+                if plugin.name == plugin_to_uninstall:
+                    found = True
+                    break
+            if not found:
+                display_plugin.uninstall_plugins.remove(plugin_to_uninstall)
+
+
+class ImageTitleLayout(QHBoxLayout):
+    '''
+    A reusable layout widget displaying an image followed by a title
+    '''
+    def __init__(self, parent, icon_name, title):
+        QHBoxLayout.__init__(self)
+        title_font = QFont()
+        title_font.setPointSize(16)
+        title_image_label = QLabel(parent)
+        pixmap = QPixmap()
+        pixmap.load(I(icon_name))
+        if pixmap is None:
+            error_dialog(parent, _('Restart required'),
+                         _('You must restart Calibre before using this plugin!'), show=True)
+        else:
+            title_image_label.setPixmap(pixmap)
+        title_image_label.setMaximumSize(32, 32)
+        title_image_label.setScaledContents(True)
+        self.addWidget(title_image_label)
+        shelf_label = QLabel(title, parent)
+        shelf_label.setFont(title_font)
+        self.addWidget(shelf_label)
+        self.insertStretch(-1)
+
+
+class SizePersistedDialog(QDialog):
+    '''
+    This dialog is a base class for any dialogs that want their size/position
+    restored when they are next opened.
+    '''
+
+    initial_extra_size = QSize(0, 0)
+
+    def __init__(self, parent, unique_pref_name):
+        QDialog.__init__(self, parent)
+        self.unique_pref_name = unique_pref_name
+        self.geom = gprefs.get(unique_pref_name, None)
+        self.finished.connect(self.dialog_closing)
+
+    def resize_dialog(self):
+        if self.geom is None:
+            self.resize(self.sizeHint()+self.initial_extra_size)
+        else:
+            self.restoreGeometry(self.geom)
+
+    def dialog_closing(self, result):
+        geom = bytearray(self.saveGeometry())
+        gprefs[self.unique_pref_name] = geom
+
+
+class VersionHistoryDialog(SizePersistedDialog):
+
+    def __init__(self, parent, plugin_name, html):
+        SizePersistedDialog.__init__(self, parent, 'Plugin Updater plugin:version history dialog')
+        self.setWindowTitle(_('Version History for %s')%plugin_name)
+
+        layout = QVBoxLayout(self)
+        self.setLayout(layout)
+
+        self.notes = QTextEdit(html, self)
+        self.notes.setReadOnly(True)
+        layout.addWidget(self.notes)
+
+        self.button_box = QDialogButtonBox(QDialogButtonBox.Close)
+        self.button_box.rejected.connect(self.reject)
+        layout.addWidget(self.button_box)
+
+        # Cause our dialog size to be restored from prefs or created on first usage
+        self.resize_dialog()
+
+
+class PluginFilterComboBox(QComboBox):
+    def __init__(self, parent):
+        QComboBox.__init__(self, parent)
+        items = [_('All'), _('Installed'), _('Update available'), _('Not installed')]
+        self.addItems(items)
+
+
+class DisplayPlugin(object):
+
+    def __init__(self, list_node):
+        # The html from the index web page looks like this:
+        '''
+<li><a href="http://www.mobileread.com/forums/showthread.php?t=121787">Book Sync</a><br />
+<i>Add books to a list to be automatically sent to your device the next time it is connected.<br />
+<span class="resize_1">Version: 1.1; Released: 02-22-2011; Calibre: 0.7.42; Author: kiwidude; <br />
+Platforms: Windows, OSX, Linux; History: Yes;</span></i></li>
+        '''
+        self.name = list_node.xpath('a')[0].text_content().strip()
+        self.forum_link = list_node.xpath('a/@href')[0].strip()
+        self.installed_version = None
+
+        description_text = list_node.xpath('i')[0].text_content()
+        description_parts = description_text.partition('Version:')
+        self.description = description_parts[0].strip()
+
+        details_text = description_parts[1] + description_parts[2].replace('\r\n','')
+        details_pairs = details_text.split(';')
+        details = {}
+        for details_pair in details_pairs:
+            pair = details_pair.split(':')
+            if len(pair) == 2:
+                key = pair[0].strip().lower()
+                value = pair[1].strip()
+                details[key] = value
+
+        donation_node = list_node.xpath('i/span/a/@href')
+        self.donation_link = donation_node[0] if donation_node else None
+
+        self.available_version = self._version_text_to_tuple(details.get('version', None))
+
+        release_date = details.get('released', '01-01-0101').split('-')
+        date_parts = [int(re.search(r'(\d+)', x).group(1)) for x in release_date]
+        self.release_date = datetime.date(date_parts[2], date_parts[0], date_parts[1])
+
+        self.calibre_required_version = self._version_text_to_tuple(details.get('calibre', None))
+        self.author = details.get('author', '')
+        self.platforms = [p.strip().lower() for p in details.get('platforms', '').split(',')]
+        # Optional pairing just for plugins which require checking for uninstall first
+        self.uninstall_plugins = []
+        uninstall = details.get('uninstall', None)
+        if uninstall:
+            self.uninstall_plugins = [i.strip() for i in uninstall.split(',')]
+        self.has_changelog = details.get('history', 'No').lower() in ['yes', 'true']
+        self.is_deprecated = details.get('deprecated', 'No').lower() in ['yes', 'true']
+
+    def _version_text_to_tuple(self, version_text):
+        if version_text:
+            ver = version_text.split('.')
+            while len(ver) < 3:
+                ver.append('0')
+            ver = [int(re.search(r'(\d+)', x).group(1)) for x in ver]
+            return tuple(ver)
+        else:
+            return None
+
+    def is_disabled(self):
+        if self.plugin is None:
+            return False
+        return is_disabled(self.plugin)
+
+    def is_installed(self):
+        return self.installed_version is not None
+
+    def is_upgrade_available(self):
+        return self.is_installed() and (self.installed_version < self.available_version \
+                or self.is_deprecated)
+
+    def is_valid_platform(self):
+        if iswindows:
+            return 'windows' in self.platforms
+        if isosx:
+            return 'osx' in self.platforms
+        return 'linux' in self.platforms
+
+    def is_valid_calibre(self):
+        return numeric_version >= self.calibre_required_version
+
+    def is_valid_to_install(self):
+        return self.is_valid_platform() and self.is_valid_calibre() and not self.is_deprecated
+
+
+class DisplayPluginSortFilterModel(QSortFilterProxyModel):
+
+    def __init__(self, parent):
+        QSortFilterProxyModel.__init__(self, parent)
+        self.setSortRole(Qt.UserRole)
+        self.filter_criteria = FILTER_ALL
+
+    def filterAcceptsRow(self, sourceRow, sourceParent):
+        index = self.sourceModel().index(sourceRow, 0, sourceParent)
+        display_plugin = self.sourceModel().display_plugins[index.row()]
+        if self.filter_criteria == FILTER_ALL:
+            return not (display_plugin.is_deprecated and not display_plugin.is_installed())
+        if self.filter_criteria == FILTER_INSTALLED:
+            return display_plugin.is_installed()
+        if self.filter_criteria == FILTER_UPDATE_AVAILABLE:
+            return display_plugin.is_upgrade_available()
+        if self.filter_criteria == FILTER_NOT_INSTALLED:
+            return not display_plugin.is_installed() and not display_plugin.is_deprecated
+        return False
+
+    def set_filter_criteria(self, filter_value):
+        self.filter_criteria = filter_value
+        self.invalidateFilter()
+
+
+class DisplayPluginModel(QAbstractTableModel):
+
+    def __init__(self, display_plugins):
+        QAbstractTableModel.__init__(self)
+        self.display_plugins = display_plugins
+        self.headers = map(QVariant, [_('Plugin Name'), _('Donate'), _('Status'), _('Installed'),
+                                      _('Available'), _('Released'), _('Calibre'), _('Author')])
+
+    def rowCount(self, *args):
+        return len(self.display_plugins)
+
+    def columnCount(self, *args):
+        return len(self.headers)
+
+    def headerData(self, section, orientation, role):
+        if role == Qt.DisplayRole and orientation == Qt.Horizontal:
+            return self.headers[section]
+        return NONE
+
+    def data(self, index, role):
+        if not index.isValid():
+            return NONE;
+        row, col = index.row(), index.column()
+        if row < 0 or row >= self.rowCount():
+            return NONE
+        display_plugin = self.display_plugins[row]
+        if role in [Qt.DisplayRole, Qt.UserRole]:
+            if col == 0:
+                return QVariant(display_plugin.name)
+            if col == 1:
+                if display_plugin.donation_link:
+                    return QVariant(_('PayPal'))
+            if col == 2:
+                return self._get_status(display_plugin)
+            if col == 3:
+                return QVariant(self._get_display_version(display_plugin.installed_version))
+            if col == 4:
+                return QVariant(self._get_display_version(display_plugin.available_version))
+            if col == 5:
+                if role == Qt.UserRole:
+                    return self._get_display_release_date(display_plugin.release_date, 'yyyyMMdd')
+                else:
+                    return self._get_display_release_date(display_plugin.release_date)
+            if col == 6:
+                return QVariant(self._get_display_version(display_plugin.calibre_required_version))
+            if col == 7:
+                return QVariant(display_plugin.author)
+        elif role == Qt.DecorationRole:
+            if col == 0:
+                return self._get_status_icon(display_plugin)
+            if col == 1:
+                if display_plugin.donation_link:
+                    return QIcon(I('donate.png'))
+        elif role == Qt.ToolTipRole:
+            if col == 1 and display_plugin.donation_link:
+                return QVariant(_('This plugin is FREE but you can reward the developer for their effort\n'
+                                  'by donating to them via PayPal.\n\n'
+                                  'Right-click and choose Donate to reward: ')+display_plugin.author)
+            else:
+                return self._get_status_tooltip(display_plugin)
+        elif role == Qt.ForegroundRole:
+            if col != 1: # Never change colour of the donation column
+                if display_plugin.is_deprecated:
+                    return QVariant(QBrush(Qt.blue))
+                if display_plugin.is_disabled():
+                    return QVariant(QBrush(Qt.gray))
+        return NONE
+
+    def plugin_to_index(self, display_plugin):
+        for i, p in enumerate(self.display_plugins):
+            if display_plugin == p:
+                return self.index(i, 0, QModelIndex())
+        return QModelIndex()
+
+    def refresh_plugin(self, display_plugin):
+        idx = self.plugin_to_index(display_plugin)
+        self.dataChanged.emit(idx, idx)
+
+    def _get_display_release_date(self, date_value, format='dd MMM yyyy'):
+        if date_value and date_value != UNDEFINED_DATE:
+            return QVariant(format_date(date_value, format))
+        return NONE
+
+    def _get_display_version(self, version):
+        if version is None:
+            return ''
+        return '.'.join([str(v) for v in list(version)])
+
+    def _get_status(self, display_plugin):
+        if not display_plugin.is_valid_platform():
+            return _('Platform unavailable')
+        if not display_plugin.is_valid_calibre():
+            return _('Calibre upgrade required')
+        if display_plugin.is_installed():
+            if display_plugin.is_deprecated:
+                return _('Plugin deprecated')
+            elif display_plugin.is_upgrade_available():
+                return _('New version available')
+            else:
+                return _('Latest version installed')
+        return _('Not installed')
+
+    def _get_status_icon(self, display_plugin):
+        if display_plugin.is_deprecated:
+            icon_name = 'plugin_deprecated.png'
+        elif display_plugin.is_disabled():
+            if display_plugin.is_upgrade_available():
+                if display_plugin.is_valid_to_install():
+                    icon_name = 'plugin_disabled_valid.png'
+                else:
+                    icon_name = 'plugin_disabled_invalid.png'
+            else:
+                icon_name = 'plugin_disabled_ok.png'
+        elif display_plugin.is_installed():
+            if display_plugin.is_upgrade_available():
+                if display_plugin.is_valid_to_install():
+                    icon_name = 'plugin_upgrade_valid.png'
+                else:
+                    icon_name = 'plugin_upgrade_invalid.png'
+            else:
+                icon_name = 'plugin_upgrade_ok.png'
+        else: # A plugin available not currently installed
+            if display_plugin.is_valid_to_install():
+                icon_name = 'plugin_new_valid.png'
+            else:
+                icon_name = 'plugin_new_invalid.png'
+        return QIcon(I('plugins/' + icon_name))
+
+    def _get_status_tooltip(self, display_plugin):
+        if display_plugin.is_deprecated:
+            return QVariant(_('This plugin has been deprecated and should be uninstalled')+'\n\n'+
+                            _('Right-click to see more options'))
+        if not display_plugin.is_valid_platform():
+            return QVariant(_('This plugin can only be installed on: %s') % \
+                            ', '.join(display_plugin.platforms)+'\n\n'+
+                            _('Right-click to see more options'))
+        if numeric_version < display_plugin.calibre_required_version:
+            return QVariant(_('You must upgrade to at least Calibre %s before installing this plugin') % \
+                            self._get_display_version(display_plugin.calibre_required_version)+'\n\n'+
+                            _('Right-click to see more options'))
+        if display_plugin.installed_version < display_plugin.available_version:
+            if display_plugin.installed_version is None:
+                return QVariant(_('You can install this plugin')+'\n\n'+
+                                _('Right-click to see more options'))
+            else:
+                return QVariant(_('A new version of this plugin is available')+'\n\n'+
+                                _('Right-click to see more options'))
+        return QVariant(_('This plugin is installed and up-to-date')+'\n\n'+
+                        _('Right-click to see more options'))
+
+
+class PluginUpdaterDialog(SizePersistedDialog):
+
+    update_found = pyqtSignal(object)
+    initial_extra_size = QSize(350, 100)
+
+    def __init__(self, gui, initial_filter=FILTER_UPDATE_AVAILABLE):
+        SizePersistedDialog.__init__(self, gui, 'Plugin Updater plugin:plugin updater dialog')
+        self.gui = gui
+        self.forum_link = None
+        self.model = None
+        self._initialize_controls()
+        self._create_context_menu()
+
+        display_plugins = read_available_plugins()
+
+        if display_plugins:
+            self.model = DisplayPluginModel(display_plugins)
+            self.proxy_model = DisplayPluginSortFilterModel(self)
+            self.proxy_model.setSourceModel(self.model)
+            self.plugin_view.setModel(self.proxy_model)
+            self.plugin_view.resizeColumnsToContents()
+            self.plugin_view.selectionModel().currentRowChanged.connect(self._plugin_current_changed)
+            self.plugin_view.doubleClicked.connect(self.install_button.click)
+            self.filter_combo.setCurrentIndex(initial_filter)
+            self._select_and_focus_view()
+        else:
+            error_dialog(self.gui, _('Update Check Failed'),
+                        _('Unable to reach the MobileRead plugins forum index page.'),
+                        det_msg=MR_INDEX_URL, show=True)
+            self.filter_combo.setEnabled(False)
+        # Cause our dialog size to be restored from prefs or created on first usage
+        self.resize_dialog()
+
+    def _initialize_controls(self):
+        self.setWindowTitle(_('Check for user plugin updates'))
+        layout = QVBoxLayout(self)
+        self.setLayout(layout)
+        title_layout = ImageTitleLayout(self, 'images/plugin_updater.png', _('User Plugin Status'))
+        layout.addLayout(title_layout)
+
+        header_layout = QHBoxLayout()
+        layout.addLayout(header_layout)
+        self.filter_combo = PluginFilterComboBox(self)
+        self.filter_combo.setMinimumContentsLength(20)
+        self.filter_combo.currentIndexChanged[int].connect(self._filter_combo_changed)
+        header_layout.addWidget(QLabel(_('Filter list of plugins')+':', self))
+        header_layout.addWidget(self.filter_combo)
+        header_layout.addStretch(10)
+
+        self.plugin_view = QTableView(self)
+        self.plugin_view.horizontalHeader().setStretchLastSection(True)
+        self.plugin_view.setSelectionBehavior(QAbstractItemView.SelectRows)
+        self.plugin_view.setSelectionMode(QAbstractItemView.SingleSelection)
+        self.plugin_view.setAlternatingRowColors(True)
+        self.plugin_view.setSortingEnabled(True)
+        self.plugin_view.setIconSize(QtCore.QSize(28, 28))
+        layout.addWidget(self.plugin_view)
+
+        details_layout = QHBoxLayout()
+        layout.addLayout(details_layout)
+        forum_label = QLabel('<a href="http://www.foo.com/">Plugin Forum Thread</a>', self)
+        forum_label.setTextInteractionFlags(Qt.LinksAccessibleByMouse | Qt.LinksAccessibleByKeyboard)
+        forum_label.linkActivated.connect(self._forum_label_activated)
+        details_layout.addWidget(QLabel(_('Description')+':', self), 0, Qt.AlignLeft)
+        details_layout.addWidget(forum_label, 1, Qt.AlignRight)
+
+        self.description = QLabel(self)
+        self.description.setFrameStyle(QFrame.Panel | QFrame.Sunken)
+        self.description.setAlignment(Qt.AlignTop | Qt.AlignLeft)
+        self.description.setMinimumHeight(40)
+        layout.addWidget(self.description)
+
+        self.button_box = QDialogButtonBox(QDialogButtonBox.Close)
+        self.button_box.rejected.connect(self._close_clicked)
+        self.install_button = self.button_box.addButton(_('&Install'), QDialogButtonBox.AcceptRole)
+        self.install_button.setToolTip(_('Install the selected plugin'))
+        self.install_button.clicked.connect(self._install_clicked)
+        self.install_button.setEnabled(False)
+        self.configure_button = self.button_box.addButton(' '+_('&Customize plugin ')+' ', QDialogButtonBox.ResetRole)
+        self.configure_button.setToolTip(_('Customize the options for this plugin'))
+        self.configure_button.clicked.connect(self._configure_clicked)
+        self.configure_button.setEnabled(False)
+        layout.addWidget(self.button_box)
+
+    def _create_context_menu(self):
+        self.plugin_view.setContextMenuPolicy(Qt.ActionsContextMenu)
+        self.install_action = QAction(QIcon(I('plugins/plugin_upgrade_ok.png')), _('&Install'), self)
+        self.install_action.setToolTip(_('Install the selected plugin'))
+        self.install_action.triggered.connect(self._install_clicked)
+        self.install_action.setEnabled(False)
+        self.plugin_view.addAction(self.install_action)
+        self.history_action = QAction(QIcon(I('chapters.png')), _('Version &History'), self)
+        self.history_action.setToolTip(_('Show history of changes to this plugin'))
+        self.history_action.triggered.connect(self._history_clicked)
+        self.history_action.setEnabled(False)
+        self.plugin_view.addAction(self.history_action)
+        self.forum_action = QAction(QIcon(I('plugins/mobileread.png')), _('Plugin &Forum Thread'), self)
+        self.forum_action.triggered.connect(self._forum_label_activated)
+        self.forum_action.setEnabled(False)
+        self.plugin_view.addAction(self.forum_action)
+
+        sep1 = QAction(self)
+        sep1.setSeparator(True)
+        self.plugin_view.addAction(sep1)
+
+        self.toggle_enabled_action = QAction(_('Enable/&Disable plugin'), self)
+        self.toggle_enabled_action.setToolTip(_('Enable or disable this plugin'))
+        self.toggle_enabled_action.triggered.connect(self._toggle_enabled_clicked)
+        self.toggle_enabled_action.setEnabled(False)
+        self.plugin_view.addAction(self.toggle_enabled_action)
+        self.uninstall_action = QAction(_('&Remove plugin'), self)
+        self.uninstall_action.setToolTip(_('Uninstall the selected plugin'))
+        self.uninstall_action.triggered.connect(self._uninstall_clicked)
+        self.uninstall_action.setEnabled(False)
+        self.plugin_view.addAction(self.uninstall_action)
+
+        sep2 = QAction(self)
+        sep2.setSeparator(True)
+        self.plugin_view.addAction(sep2)
+
+        self.donate_enabled_action = QAction(QIcon(I('donate.png')), _('Donate to developer'), self)
+        self.donate_enabled_action.setToolTip(_('Donate to the developer of this plugin'))
+        self.donate_enabled_action.triggered.connect(self._donate_clicked)
+        self.donate_enabled_action.setEnabled(False)
+        self.plugin_view.addAction(self.donate_enabled_action)
+
+        sep3 = QAction(self)
+        sep3.setSeparator(True)
+        self.plugin_view.addAction(sep3)
+
+        self.configure_action = QAction(QIcon(I('config.png')), _('&Customize plugin'), self)
+        self.configure_action.setToolTip(_('Customize the options for this plugin'))
+        self.configure_action.triggered.connect(self._configure_clicked)
+        self.configure_action.setEnabled(False)
+        self.plugin_view.addAction(self.configure_action)
+
+    def _close_clicked(self):
+        # Force our toolbar/action to be updated based on uninstalled updates
+        if self.model:
+            update_plugins = filter(filter_upgradeable_plugins, self.model.display_plugins)
+            self.update_found.emit(update_plugins)
+        self.reject()
+
+    def _plugin_current_changed(self, current, previous):
+        if current.isValid():
+            actual_idx = self.proxy_model.mapToSource(current)
+            display_plugin = self.model.display_plugins[actual_idx.row()]
+            self.description.setText(display_plugin.description)
+            self.forum_link = display_plugin.forum_link
+            self.forum_action.setEnabled(bool(self.forum_link))
+            self.install_button.setEnabled(display_plugin.is_valid_to_install())
+            self.install_action.setEnabled(self.install_button.isEnabled())
+            self.uninstall_action.setEnabled(display_plugin.is_installed())
+            self.history_action.setEnabled(display_plugin.has_changelog)
+            self.configure_button.setEnabled(display_plugin.is_installed())
+            self.configure_action.setEnabled(self.configure_button.isEnabled())
+            self.toggle_enabled_action.setEnabled(display_plugin.is_installed())
+            self.donate_enabled_action.setEnabled(bool(display_plugin.donation_link))
+        else:
+            self.description.setText('')
+            self.forum_link = None
+            self.forum_action.setEnabled(False)
+            self.install_button.setEnabled(False)
+            self.install_action.setEnabled(False)
+            self.uninstall_action.setEnabled(False)
+            self.history_action.setEnabled(False)
+            self.configure_button.setEnabled(False)
+            self.configure_action.setEnabled(False)
+            self.toggle_enabled_action.setEnabled(False)
+            self.donate_enabled_action.setEnabled(False)
+
+    def _donate_clicked(self):
+        plugin = self._selected_display_plugin()
+        if plugin and plugin.donation_link:
+            open_url(QUrl(plugin.donation_link))
+
+    def _select_and_focus_view(self, change_selection=True):
+        if change_selection and self.plugin_view.model().rowCount() > 0:
+            self.plugin_view.selectRow(0)
+        else:
+            idx = self.plugin_view.selectionModel().currentIndex()
+            self._plugin_current_changed(idx, 0)
+        self.plugin_view.setFocus()
+
+    def _filter_combo_changed(self, idx):
+        self.proxy_model.set_filter_criteria(idx)
+        if idx == FILTER_NOT_INSTALLED:
+            self.plugin_view.sortByColumn(5, Qt.DescendingOrder)
+        else:
+            self.plugin_view.sortByColumn(0, Qt.AscendingOrder)
+        self._select_and_focus_view()
+
+    def _forum_label_activated(self):
+        if self.forum_link:
+            open_url(QUrl(self.forum_link))
+
+    def _selected_display_plugin(self):
+        idx = self.plugin_view.selectionModel().currentIndex()
+        actual_idx = self.proxy_model.mapToSource(idx)
+        return self.model.display_plugins[actual_idx.row()]
+
+    def _uninstall_plugin(self, name_to_remove):
+        if DEBUG:
+            prints('Removing plugin: ', name_to_remove)
+        remove_plugin(name_to_remove)
+        # Make sure that any other plugins that required this plugin
+        # to be uninstalled first have the requirement removed
+        for display_plugin in self.model.display_plugins:
+            # Make sure we update the status and display of the
+            # plugin we just uninstalled
+            if name_to_remove in display_plugin.uninstall_plugins:
+                if DEBUG:
+                    prints('Removing uninstall dependency for: ', display_plugin.name)
+                display_plugin.uninstall_plugins.remove(name_to_remove)
+            if display_plugin.name == name_to_remove:
+                if DEBUG:
+                    prints('Resetting plugin to uninstalled status: ', display_plugin.name)
+                display_plugin.installed_version = None
+                display_plugin.plugin = None
+                display_plugin.uninstall_plugins = []
+                if self.proxy_model.filter_criteria not in [FILTER_INSTALLED, FILTER_UPDATE_AVAILABLE]:
+                    self.model.refresh_plugin(display_plugin)
+
+    def _uninstall_clicked(self):
+        display_plugin = self._selected_display_plugin()
+        if not question_dialog(self, _('Are you sure?'), '<p>'+
+                   _('Are you sure you want to uninstall the <b>%s</b> plugin?')%display_plugin.name,
+                   show_copy_button=False):
+            return
+        self._uninstall_plugin(display_plugin.name)
+        if self.proxy_model.filter_criteria in [FILTER_INSTALLED, FILTER_UPDATE_AVAILABLE]:
+            self.model.reset()
+            self._select_and_focus_view()
+        else:
+            self._select_and_focus_view(change_selection=False)
+
+    def _install_clicked(self):
+        display_plugin = self._selected_display_plugin()
+        if not question_dialog(self, _('Install %s')%display_plugin.name, '<p>' + \
+                _('Installing plugins is a <b>security risk</b>. '
+                'Plugins can contain a virus/malware. '
+                    'Only install it if you got it from a trusted source.'
+                    ' Are you sure you want to proceed?'),
+                show_copy_button=False):
+            return
+
+        if display_plugin.uninstall_plugins:
+            uninstall_names = list(display_plugin.uninstall_plugins)
+            if DEBUG:
+                prints('Uninstalling plugin: ', ', '.join(uninstall_names))
+            for name_to_remove in uninstall_names:
+                self._uninstall_plugin(name_to_remove)
+
+        if DEBUG:
+            prints('Locating zip file for %s: %s'% (display_plugin.name, display_plugin.forum_link))
+        self.gui.status_bar.showMessage(_('Locating zip file for %s: %s') % (display_plugin.name, display_plugin.forum_link))
+        plugin_zip_url = self._read_zip_attachment_url(display_plugin.forum_link)
+        if not plugin_zip_url:
+            return error_dialog(self.gui, _('Install Plugin Failed'),
+                        _('Unable to locate a plugin zip file for <b>%s</b>') % display_plugin.name,
+                        det_msg=display_plugin.forum_link, show=True)
+
+        if DEBUG:
+            prints('Downloading plugin zip attachment: ', plugin_zip_url)
+        self.gui.status_bar.showMessage(_('Downloading plugin zip attachment: %s') % plugin_zip_url)
+        zip_path = self._download_zip(plugin_zip_url)
+
+        if DEBUG:
+            prints('Installing plugin: ', zip_path)
+        self.gui.status_bar.showMessage(_('Installing plugin: %s') % zip_path)
+
+        try:
+            try:
+                plugin = add_plugin(zip_path)
+            except NameConflict as e:
+                return error_dialog(self.gui, _('Already exists'),
+                        unicode(e), show=True)
+            # Check for any toolbars to add to.
+            widget = ConfigWidget(self.gui)
+            widget.gui = self.gui
+            widget.check_for_add_to_toolbars(plugin)
+            self.gui.status_bar.showMessage(_('Plugin installed: %s') % display_plugin.name)
+            info_dialog(self.gui, _('Success'),
+                    _('Plugin <b>{0}</b> successfully installed under <b>'
+                        ' {1} plugins</b>. You may have to restart calibre '
+                        'for the plugin to take effect.').format(plugin.name, plugin.type),
+                    show=True, show_copy_button=False)
+
+            display_plugin.plugin = plugin
+            # We cannot read the 'actual' version information as the plugin will not be loaded yet
+            display_plugin.installed_version = display_plugin.available_version
+        except:
+            if DEBUG:
+                prints('ERROR occurred while installing plugin: %s'%display_plugin.name)
+                traceback.print_exc()
+            error_dialog(self.gui, _('Install Plugin Failed'),
+                         _('A problem occurred while installing this plugin.'
+                           ' This plugin will now be uninstalled.'
+                           ' Please post the error message in details below into'
+                           ' the forum thread for this plugin and restart Calibre.'),
+                         det_msg=traceback.format_exc(), show=True)
+            if DEBUG:
+                prints('Due to error now uninstalling plugin: %s'%display_plugin.name)
+                remove_plugin(display_plugin.name)
+                display_plugin.plugin = None
+
+        display_plugin.uninstall_plugins = []
+        if self.proxy_model.filter_criteria in [FILTER_NOT_INSTALLED, FILTER_UPDATE_AVAILABLE]:
+            self.model.reset()
+            self._select_and_focus_view()
+        else:
+            self.model.refresh_plugin(display_plugin)
+            self._select_and_focus_view(change_selection=False)
+
+    def _history_clicked(self):
+        display_plugin = self._selected_display_plugin()
+        text = self._read_version_history_html(display_plugin.forum_link)
+        if text:
+            dlg = VersionHistoryDialog(self, display_plugin.name, text)
+            dlg.exec_()
+        else:
+            return error_dialog(self, _('Version history missing'),
+                _('Unable to find the version history for %s')%display_plugin.name,
+                show=True)
+
+    def _configure_clicked(self):
+        display_plugin = self._selected_display_plugin()
+        plugin = display_plugin.plugin
+        if not plugin.is_customizable():
+            return info_dialog(self, _('Plugin not customizable'),
+                _('Plugin: %s does not need customization')%plugin.name, show=True)
+        from calibre.customize import InterfaceActionBase
+        if isinstance(plugin, InterfaceActionBase) and not getattr(plugin,
+                'actual_iaction_plugin_loaded', False):
+            return error_dialog(self, _('Must restart'),
+                    _('You must restart calibre before you can'
+                        ' configure the <b>%s</b> plugin')%plugin.name, show=True)
+        plugin.do_user_config(self.parent())
+
+    def _toggle_enabled_clicked(self):
+        display_plugin = self._selected_display_plugin()
+        plugin = display_plugin.plugin
+        if not plugin.can_be_disabled:
+            return error_dialog(self,_('Plugin cannot be disabled'),
+                         _('The plugin: %s cannot be disabled')%plugin.name, show=True)
+        if is_disabled(plugin):
+            enable_plugin(plugin)
+        else:
+            disable_plugin(plugin)
+        self.model.refresh_plugin(display_plugin)
+
+    def _read_version_history_html(self, forum_link):
+        br = browser()
+        br.set_handle_gzip(True)
+        try:
+            raw = br.open_novisit(forum_link).read()
+            if not raw:
+                return None
+        except:
+            traceback.print_exc()
+            return None
+        raw = raw.decode('utf-8', errors='replace')
+        root = html.fromstring(raw)
+        spoiler_nodes = root.xpath('//div[@class="smallfont" and strong="Spoiler"]')
+        for spoiler_node in spoiler_nodes:
+            try:
+                if spoiler_node.getprevious() is None:
+                    # This is a spoiler node that has been indented using [INDENT]
+                    # Need to go up to parent div, then previous node to get header
+                    heading_node = spoiler_node.getparent().getprevious()
+                else:
+                    # This is a spoiler node after a BR tag from the heading
+                    heading_node = spoiler_node.getprevious().getprevious()
+                if heading_node is None:
+                    continue
+                if heading_node.text_content().lower().find('version history') != -1:
+                    div_node = spoiler_node.xpath('div')[0]
+                    text = html.tostring(div_node, method='html', encoding=unicode)
+                    return re.sub('<div\s.*?>', '<div>', text)
+            except:
+                if DEBUG:
+                    prints('======= MobileRead Parse Error =======')
+                    traceback.print_exc()
+                    prints(html.tostring(spoiler_node))
+        return None
+
+    def _read_zip_attachment_url(self, forum_link):
+        br = browser()
+        br.set_handle_gzip(True)
+        try:
+            raw = br.open_novisit(forum_link).read()
+            if not raw:
+                return None
+        except:
+            traceback.print_exc()
+            return None
+        raw = raw.decode('utf-8', errors='replace')
+        root = html.fromstring(raw)
+        attachment_nodes = root.xpath('//fieldset/table/tr/td/a')
+        for attachment_node in attachment_nodes:
+            try:
+                filename = attachment_node.text_content().lower()
+                if filename.find('.zip') != -1:
+                    full_url = MR_URL + attachment_node.attrib['href']
+                    return full_url
+            except:
+                if DEBUG:
+                    prints('======= MobileRead Parse Error =======')
+                    traceback.print_exc()
+                    prints(html.tostring(attachment_node))
+        return None
+
+    def _download_zip(self, plugin_zip_url):
+        from calibre.ptempfile import PersistentTemporaryFile
+        br = browser()
+        br.set_handle_gzip(True)
+        raw = br.open_novisit(plugin_zip_url).read()
+        pt = PersistentTemporaryFile('.zip')
+        pt.write(raw)
+        pt.close()
+        return pt.name

src/calibre/gui2/preferences/plugins.py

@@ -217,6 +217,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         self.customize_plugin_button.clicked.connect(self.customize_plugin)
         self.remove_plugin_button.clicked.connect(self.remove_plugin)
         self.button_plugin_add.clicked.connect(self.add_plugin)
+        self.button_plugin_updates.clicked.connect(self.update_plugins)
         self.search.initialize('plugin_search_history',
                 help_text=_('Search for plugin'))
         self.search.search.connect(self.find)
@@ -353,6 +354,14 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
                          plugin.name + _(' cannot be removed. It is a '
                          'builtin plugin. Try disabling it instead.')).exec_()
 
+    def update_plugins(self):
+        from calibre.gui2.dialogs.plugin_updater import PluginUpdaterDialog
+        d = PluginUpdaterDialog(self.gui)
+        d.exec_()
+        self._plugin_model.populate()
+        self._plugin_model.reset()
+        self.changed_signal.emit()
+
     def reload_store_plugins(self):
         self.gui.load_store_plugins()
         if self.gui.iactions.has_key('Store'):

src/calibre/gui2/preferences/plugins.ui

@@ -112,6 +112,8 @@
      </item>
     </layout>
    </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout_7">
      <item>
       <widget class="QPushButton" name="button_plugin_add">
        <property name="text">
@@ -123,6 +125,19 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QPushButton" name="button_plugin_updates">
+       <property name="text">
+        <string>&amp;Plugin updates</string>
+       </property>
+       <property name="icon">
+        <iconset resource="../../../../resources/images.qrc">
+         <normaloff>:/images/plugins/plugin_updater.png</normaloff>:/images/plugins/plugin_updater.png</iconset>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
   </layout>
  </widget>
  <customwidgets>

src/calibre/gui2/update.py

@@ -11,12 +11,14 @@ from calibre.constants import __appname__, __version__, iswindows, isosx
 from calibre import browser
 from calibre.utils.config import prefs
 from calibre.gui2 import config, dynamic, open_url
+from calibre.gui2.dialogs.plugin_updater import get_plugin_updates_available
 
 URL = 'http://status.calibre-ebook.com/latest'
 
 class CheckForUpdates(QThread):
 
     update_found = pyqtSignal(object)
+    plugin_update_found = pyqtSignal(object)
     INTERVAL = 24*60*60
 
     def __init__(self, parent):
@@ -36,6 +38,12 @@ class CheckForUpdates(QThread):
                     self.update_found.emit(version)
             except:
                 traceback.print_exc()
+            try:
+                update_plugins = get_plugin_updates_available()
+                if update_plugins:
+                    self.plugin_update_found.emit(update_plugins)
+            except:
+                traceback.print_exc()
             self.sleep(self.INTERVAL)
 
 class UpdateNotification(QDialog):
@@ -93,6 +101,8 @@ class UpdateMixin(object):
             self.update_checker = CheckForUpdates(self)
             self.update_checker.update_found.connect(self.update_found,
                     type=Qt.QueuedConnection)
+            self.update_checker.plugin_update_found.connect(self.plugin_update_found,
+                    type=Qt.QueuedConnection)
             self.update_checker.start()
 
     def update_found(self, version, force=False):
@@ -106,4 +116,18 @@ class UpdateMixin(object):
                     parent=self)
             self._update_notification__.show()
 
+    def plugin_update_found(self, updates, icon_only=False):
+        # Change the plugin icon to indicate there are updates available
+        plugin = self.iactions.get('Plugin Updates', None)
+        if not plugin:
+            return
+        if updates:
+            plugin.qaction.setText(_('Plugin Updates')+'*')
+            plugin.qaction.setIcon(QIcon(I('plugins/plugin_updater_updates.png')))
+            plugin.qaction.setToolTip(_('There are %d plugin updates available')%len(updates))
+        else:
+            plugin.qaction.setText(_('Plugin Updates'))
+            plugin.qaction.setIcon(QIcon(I('plugins/plugin_updater.png')))
+            plugin.qaction.setToolTip(_('Install and configure user plugins'))
+