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#!/usr/bin/env python |
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# -*- coding: UTF-8 -*- |
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import sys |
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import collections |
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from markupsafe import Markup |
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from flask import url_for |
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from .__meta__ import __app__ |
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class PluginNotFoundError(ImportError): |
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pass |
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class PluginManagerBase(object): |
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@property |
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def namespaces(self): |
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return self.app.config['plugin_namespaces'] |
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def __init__(self, app=None): |
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if not app is None: |
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self.init_app(app) |
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def init_app(self, app): |
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self.app = app |
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if not hasattr(app, 'extensions'): |
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app.extensions = {} |
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app.extensions['plugin_manager'] = self |
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def import_plugin(self, plugin): |
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names = [ |
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'%s.%s' % (namespace, plugin) if namespace else plugin |
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for namespace in self.namespaces |
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] |
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for name in names: |
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try: |
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__import__(name) |
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return sys.modules[name] |
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except (ImportError, IndexError): |
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pass |
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raise PluginNotFoundError('No plugin module %r found, tried %r' % (plugin, names), plugin, names) |
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def load_plugin(self, plugin): |
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module = self.import_plugin(plugin) |
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if hasattr(module, 'register_plugin'): |
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module.register_plugin(self) |
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return module |
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class BlueprintPluginManager(PluginManagerBase): |
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def register_blueprint(self, blueprint): |
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self.app.register_blueprint(blueprint) |
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class WidgetBase(object): |
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place = None |
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def __init__(self, *args, **kwargs): |
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self.args = args |
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self.kwargs = kwargs |
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class ButtonWidget(WidgetBase): |
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place = 'button' |
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def __init__(self, html='', text='', css=""): |
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self.content = Markup(html) if html else text |
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self.css = css |
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class StyleWidget(WidgetBase): |
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place = 'style' |
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@property |
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def href(self): |
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return url_for(*self.args, **self.kwargs) |
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class JavascriptWidget(WidgetBase): |
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place = 'javascript' |
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@property |
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def src(self): |
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return url_for(*self.args, **self.kwargs) |
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class MimetypeActionPluginManager(PluginManagerBase): |
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action_class = collections.namedtuple('MimetypeAction', ('endpoint', 'widget')) |
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button_class = ButtonWidget |
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style_class = StyleWidget |
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javascript_class = JavascriptWidget |
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def __init__(self, app=None): |
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self._root = {} |
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self._widgets = {} |
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super(MimetypeActionPluginManager, self).__init__(app=app) |
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def get_widgets(self, place): |
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return self._widgets.get(place, []) |
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def get_actions(self, mimetype): |
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category, variant = mimetype.split('/') |
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return [ |
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action |
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for tree_category in (category, '*') |
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for tree_variant in (variant, '*') |
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for action in self._root.get(tree_category, {}).get(tree_variant, ()) |
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] |
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def register_widget(self, widget): |
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self._widgets.setdefault(widget.place, []).append(widget) |
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def register_action(self, endpoint, widget, mimetypes=(), **kwargs): |
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action = self.action_class(endpoint, widget) |
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for mimetype in mimetypes: |
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category, variant = mimetype.split('/') |
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self._root.setdefault(category, {}).setdefault(variant, []).append(action) |
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class PluginManager(BlueprintPluginManager, MimetypeActionPluginManager): |
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pass |
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ergoithz /
browsepy
