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annotate frontends/src/quick_frontend/quick_widgets.py @ 1462:c74015dc2785

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quick_frontend: minor fixes
author Goffi <goffi@goffi.org>
date Sun, 16 Aug 2015 01:01:34 +0200
parents e2e75c3c7c7b
children d17772b0fe22
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1 #!/usr/bin/python
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2 # -*- coding: utf-8 -*-
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3
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4 # helper class for making a SAT frontend
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5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Jérôme Poisson (goffi@goffi.org)
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 from sat.core.log import getLogger
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21 log = getLogger(__name__)
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22 from sat.core import exceptions
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23
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24 from sat_frontends.quick_frontend.constants import Const as C
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26 classes_map = {}
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29 try:
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30 # FIXME: to be removed when an acceptable solution is here
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31 unicode('') # XXX: unicode doesn't exist in pyjamas
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32 except (TypeError, AttributeError): # Error raised is not the same depending on pyjsbuild options
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33 unicode = str
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34
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36 def register(base_cls, child_cls=None):
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37 """Register a child class to use by default when a base class is needed
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39 @param base_cls: "Quick..." base class (like QuickChat or QuickContact), must inherit from QuickWidget
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40 @param child_cls: inherited class to use when Quick... class is requested, must inherit from base_cls.
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41 Can be None if it's the base_cls itself which register
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42 """
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43 # FIXME: we use base_cls.__name__ instead of base_cls directly because pyjamas because
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44 # in the second case
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45 classes_map[base_cls.__name__] = child_cls
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48 class WidgetAlreadyExistsError(Exception):
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49 pass
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52 class QuickWidgetsManager(object):
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53 """This class is used to manage all the widgets of a frontend
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54 A widget can be a window, a graphical thing, or someting else depending of the frontend"""
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55
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56 def __init__(self, host):
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57 self.host = host
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58 self._widgets = {}
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59
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60 def __iter__(self):
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61 """Iterate throught all widgets"""
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62 for widget_map in self._widgets.itervalues():
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63 for widget in widget_map.itervalues():
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64 yield widget
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66 def getRealClass(self, class_):
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67 """Return class registered for given class_
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68
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69 @param class_: subclass of QuickWidget
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70 @return: class actually used to create widget
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71 """
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72 try:
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73 # FIXME: we use base_cls.__name__ instead of base_cls directly because pyjamas bugs
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74 # in the second case
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75 cls = classes_map[class_.__name__]
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76 except KeyError:
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77 cls = class_
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78 if cls is None:
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79 raise exceptions.InternalError("There is not class registered for {}".format(class_))
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80 return cls
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81
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82 def getWidgets(self, class_):
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83 """Get all subclassed widgets
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84
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85 @param class_: subclass of QuickWidget, same parameter as used in [getOrCreateWidget]
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86 @return: iterator on widgets
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87 """
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88 class_ = self.getRealClass(class_)
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89 try:
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90 widgets_map = self._widgets[class_.__name__]
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91 except KeyError:
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92 return iter([])
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93 else:
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94 return widgets_map.itervalues()
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95
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96 def getWidget(self, class_, target, profile):
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97 """Get a widget without creating it if it doesn't exist.
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98
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99 @param class_(class): class of the widget to create
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100 @param target: target depending of the widget, usually a JID instance
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101 @param profile (unicode): %(doc_profile)s
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102 @return: a class_ instance or None if the widget doesn't exist
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103 """
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104 class_ = self.getRealClass(class_)
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105 hash_ = class_.getWidgetHash(target, profile)
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106 try:
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107 return self._widgets[class_.__name__][hash_]
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108 except KeyError:
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109 return None
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110
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111 def getOrCreateWidget(self, class_, target, *args, **kwargs):
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112 """Get an existing widget or create a new one when necessary
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113
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114 If the widget is new, self.host.newWidget will be called with it.
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115 @param class_(class): class of the widget to create
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parents: 1139
diff changeset
116 @param target: target depending of the widget, usually a JID instance
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parents: 1139
diff changeset
117 @param args(list): optional args to create a new instance of class_
1312
9e904f8a094e quick_frontend: getOrCreateWidget callbacks can return another widget
souliane <souliane@mailoo.org>
parents: 1310
diff changeset
118 @param kwargs(dict): optional kwargs to create a new instance of class_
1265
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parents: 1139
diff changeset
119 if 'profile' key is present, it will be popped and put in 'profiles'
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parents: 1139
diff changeset
120 if there is neither 'profile' nor 'profiles', None will be used for 'profiles'
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
121 if 'on_new_widget' is present it can have the following values:
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
122 C.WIDGET_NEW [default]: self.host.newWidget will be called on widget creation
1322
1f13a837e4b2 quick_frontend (quick_widgets): revert commit 1319
souliane <souliane@mailoo.org>
parents: 1321
diff changeset
123 [callable]: this method will be called instead of self.host.newWidget
1265
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parents: 1139
diff changeset
124 None: do nothing
1301
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parents: 1290
diff changeset
125 if 'on_existing_widget' is present it can have the following values:
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
126 C.WIDGET_KEEP [default]: return the existing widget
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
127 C.WIDGET_RAISE: raise WidgetAlreadyExistsError
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
128 C.WIDGET_RECREATE: create a new widget *WITH A NEW HASH*
1322
1f13a837e4b2 quick_frontend (quick_widgets): revert commit 1319
souliane <souliane@mailoo.org>
parents: 1321
diff changeset
129 [callable]: this method will be called with existing widget as argument
1265
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parents: 1139
diff changeset
130 if 'force_hash' is present, the hash given in value will be used instead of the one returned by class_.getWidgetHash
1307
9512590dc3d7 quick_ frontend (quick widgets): added explanation in docstring for non special keywords in getOrCreateWidget
Goffi <goffi@goffi.org>
parents: 1304
diff changeset
131 other keys will be used to instanciate class_ if the case happen (e.g. if type_ is present and class_ is a QuickChat subclass,
9512590dc3d7 quick_ frontend (quick widgets): added explanation in docstring for non special keywords in getOrCreateWidget
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parents: 1304
diff changeset
132 it will be used to create a new QuickChat instance).
1265
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parents: 1139
diff changeset
133 @return: a class_ instance, either new or already existing
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parents: 1139
diff changeset
134 """
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diff changeset
135 cls = self.getRealClass(class_)
1265
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parents: 1139
diff changeset
136
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
137 ## arguments management ##
1265
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parents: 1139
diff changeset
138 _args = [self.host, target] + list(args) or [] # FIXME: check if it's really necessary to use optional args
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parents: 1139
diff changeset
139 _kwargs = kwargs or {}
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parents: 1139
diff changeset
140 if 'profiles' in _kwargs and 'profile' in _kwargs:
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parents: 1139
diff changeset
141 raise ValueError("You can't have 'profile' and 'profiles' keys at the same time")
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
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parents: 1139
diff changeset
142 try:
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parents: 1139
diff changeset
143 _kwargs['profiles'] = _kwargs.pop('profile')
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parents: 1139
diff changeset
144 except KeyError:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
145 if not 'profiles' in _kwargs:
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parents: 1139
diff changeset
146 _kwargs['profiles'] = None
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parents: 1139
diff changeset
147
1301
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parents: 1290
diff changeset
148 #on_new_widget tell what to do for the new widget creation
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parents: 1290
diff changeset
149 try:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
150 on_new_widget = _kwargs.pop('on_new_widget')
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parents: 1290
diff changeset
151 except KeyError:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
152 on_new_widget = C.WIDGET_NEW
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parents: 1290
diff changeset
153
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parents: 1290
diff changeset
154 #on_existing_widget tell what to do when the widget already exists
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parents: 1290
diff changeset
155 try:
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parents: 1290
diff changeset
156 on_existing_widget = _kwargs.pop('on_existing_widget')
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parents: 1290
diff changeset
157 except KeyError:
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parents: 1290
diff changeset
158 on_existing_widget = C.WIDGET_KEEP
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diff changeset
159
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diff changeset
160 ## we get the hash ##
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parents: 1139
diff changeset
161 try:
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parents: 1139
diff changeset
162 hash_ = _kwargs.pop('force_hash')
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parents: 1139
diff changeset
163 except KeyError:
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Goffi <goffi@goffi.org>
parents: 1139
diff changeset
164 hash_ = cls.getWidgetHash(target, _kwargs['profiles'])
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Goffi <goffi@goffi.org>
parents: 1139
diff changeset
165
1304
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Goffi <goffi@goffi.org>
parents: 1303
diff changeset
166 ## widget creation or retrieval ##
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Goffi <goffi@goffi.org>
parents: 1303
diff changeset
167
1a61b18703c4 quick frontend (quick widgets): class' __name__ method is used for classes_map hash because the use of class directly was causing bugs with pyjamas (difficult to find, several MicroblogPanel instances were added only once in Libervia's TabPanel, hash method seemed buggy)
Goffi <goffi@goffi.org>
parents: 1303
diff changeset
168 widgets_map = self._widgets.setdefault(cls.__name__, {}) # we sorts widgets by classes
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diff changeset
169 if not cls.SINGLE:
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parents: 1139
diff changeset
170 widget = None # if the class is not SINGLE, we always create a new widget
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parents: 1139
diff changeset
171 else:
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parents: 1139
diff changeset
172 try:
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parents: 1265
diff changeset
173 widget = widgets_map[hash_]
1265
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parents: 1139
diff changeset
174 widget.addTarget(target)
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Goffi <goffi@goffi.org>
parents: 1139
diff changeset
175 except KeyError:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
176 widget = None
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parents: 1139
diff changeset
177
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Goffi <goffi@goffi.org>
parents: 1139
diff changeset
178 if widget is None:
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parents: 1139
diff changeset
179 # we need to create a new widget
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parents: 1139
diff changeset
180 log.debug(u"Creating new widget for target {} {}".format(target, cls))
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
181 widget = cls(*_args, **_kwargs)
1290
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Goffi <goffi@goffi.org>
parents: 1265
diff changeset
182 widgets_map[hash_] = widget
0
goffi@necton2
parents:
diff changeset
183
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
184 if on_new_widget == C.WIDGET_NEW:
1265
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Goffi <goffi@goffi.org>
parents: 1139
diff changeset
185 self.host.newWidget(widget)
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
186 elif callable(on_new_widget):
1322
1f13a837e4b2 quick_frontend (quick_widgets): revert commit 1319
souliane <souliane@mailoo.org>
parents: 1321
diff changeset
187 on_new_widget(widget)
1265
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parents: 1139
diff changeset
188 else:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
189 assert on_new_widget is None
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
190 else:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
191 # the widget already exists
1308
f079e6ed1e69 quick frontend(quick widgets): added the ability to use a callable with getOrCreateWidget's on_existing_widget
Goffi <goffi@goffi.org>
parents: 1307
diff changeset
192 if on_existing_widget == C.WIDGET_KEEP:
f079e6ed1e69 quick frontend(quick widgets): added the ability to use a callable with getOrCreateWidget's on_existing_widget
Goffi <goffi@goffi.org>
parents: 1307
diff changeset
193 pass
1309
d0d5ba3b4d64 quick frontend(quick widgets): fixed bad condition test in previous commit
Goffi <goffi@goffi.org>
parents: 1308
diff changeset
194 elif on_existing_widget == C.WIDGET_RAISE:
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
195 raise WidgetAlreadyExistsError(hash_)
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
196 elif on_existing_widget == C.WIDGET_RECREATE:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
197 # we use getOrCreateWidget to recreate the new widget
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diff changeset
198 # /!\ we use args and kwargs and not _args and _kwargs because we need the original args
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
199 # we need to get rid of kwargs special options
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parents: 1290
diff changeset
200 new_kwargs = kwargs.copy()
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
201 try:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
202 new_kwargs.pop('force_hash') # FIXME: we use pop instead of del here because pyjamas doesn't raise error on del
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
203 except KeyError:
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
204 pass
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
205 else:
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
206 raise ValueError("force_hash option can't be used with on_existing_widget=RECREATE")
1265
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diff changeset
207
1301
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
208 # XXX: keep up-to-date if new special kwargs are added (i.e.: delete these keys here)
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
209 new_kwargs['on_existing_widget'] = C.WIDGET_RAISE
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
210 hash_idx = 1
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
211 while True:
1310
9ca93ecdeea5 quick_frontend: fixes hash setting for QuickWidget
souliane <souliane@mailoo.org>
parents: 1309
diff changeset
212 new_kwargs['force_hash'] = "{}_new_instance_{}".format(hash_, hash_idx)
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
213 try:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
214 widget = self.getOrCreateWidget(class_, target, *args, **new_kwargs)
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
215 except WidgetAlreadyExistsError:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
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216 hash_idx += 1
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217 else:
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218 log.debug(u"Widget already exists, a new one has been recreated with hash {}".format(new_kwargs['force_hash']))
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219 break
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220 elif callable(on_existing_widget):
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221 on_existing_widget(widget)
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222 else:
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223 raise exceptions.InternalError("Unexpected on_existing_widget value ({})".format(on_existing_widget))
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224
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225 return widget
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226
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227 def deleteWidget(self, widget_to_delete):
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228 """Delete a widget
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229
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230 widget's onDelete method will be called before deletion
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231 """
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232 widget_to_delete.onDelete()
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233
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234 for widget_map in self._widgets.itervalues():
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235 to_delete = set()
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236 for hash_, widget in widget_map.iteritems():
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237 if widget_to_delete is widget:
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238 to_delete.add(hash_)
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239 for hash_ in to_delete:
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240 del widget_map[hash_]
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241
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242
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243 class QuickWidget(object):
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244 """generic widget base"""
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245 SINGLE=True # if True, there can be only one widget per target(s)
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246 PROFILES_MULTIPLE=False
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247 PROFILES_ALLOW_NONE=False
0
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248
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249 def __init__(self, host, target, profiles=None):
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250 """
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251 @param host: %(doc_host)s
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252 @param target: target specific for this widget class
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253 @param profiles: can be either:
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254 - (unicode): used when widget class manage a unique profile
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255 - (iterable): some widget class can manage several profiles, several at once can be specified here
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256 - None: no profile is managed by this widget class (rare)
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257 @raise: ValueError when (iterable) or None is given to profiles for a widget class which manage one unique profile.
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258 """
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259 self.host = host
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260 self.targets = set()
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261 self.addTarget(target)
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262 self.profiles = set()
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263 if isinstance(profiles, basestring):
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264 self.addProfile(profiles)
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265 elif profiles is None:
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266 if not self.PROFILES_ALLOW_NONE:
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267 raise ValueError("profiles can't have a value of None")
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268 else:
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269 if not self.PROFILES_MULTIPLE:
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270 raise ValueError("multiple profiles are not allowed")
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271 for profile in profiles:
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272 self.addProfile(profile)
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273
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274 @property
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275 def profile(self):
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276 assert len(self.profiles) == 1 and not self.PROFILES_MULTIPLE and not self.PROFILES_ALLOW_NONE
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277 return list(self.profiles)[0]
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278
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279 def addTarget(self, target):
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280 """Add a target if it doesn't already exists
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281
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282 @param target: target to add
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283 """
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284 self.targets.add(target)
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285
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286 def addProfile(self, profile):
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287 """Add a profile is if doesn't already exists
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288
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289 @param profile: profile to add
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290 """
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291 if self.profiles and not self.PROFILES_MULTIPLE:
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292 raise ValueError("multiple profiles are not allowed")
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293 self.profiles.add(profile)
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294
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295 @staticmethod
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296 def getWidgetHash(target, profiles):
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297 """Return the hash associated with this target for this widget class
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298
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299 some widget classes can manage several target on the same instance
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300 (e.g.: a chat widget with multiple resources on the same bare jid),
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301 this method allow to return a hash associated to one or several targets
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302 to retrieve the good instance. For example, a widget managing JID targets,
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303 and all resource of the same bare jid would return the bare jid as hash.
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304
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305 @param target: target to check
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306 @param profiles: profile(s) associated to target, see __init__ docstring
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307 @return: a hash (can correspond to one or many targets or profiles, depending of widget class)
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308 """
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309 return unicode(target) # by defaut, there is one hash for one target
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310
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311 def onDelete(self):
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312 """Called when a widget is deleted"""
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313 log.debug(u"deleting widget {}".format(self)) # Must be implemented by frontends
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314 if self.host.selected_widget == self:
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315 self.host.selected_widget = None
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316