Mercurial > libervia-web

annotate src/browser/sat_browser/base_menu.py @ 632:c2abadf31afb frontends_multi_profiles

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browser side (menu): minor improvments: - use of new style class for MenuCmd and PluginMenuCmd (useless for pyjamas, but can be useful in the future) - use of try/except instead of hasattr - do not use "None" for WidgetMenuBar's __init__
author Goffi <goffi@goffi.org>
date Mon, 23 Feb 2015 18:43:08 +0100
parents a5019e62c3e9
children 6d3142b782c3
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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 # Libervia: a Salut à Toi frontend
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5 # Copyright (C) 2011, 2012, 2013, 2014 Jérôme Poisson <goffi@goffi.org>
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6
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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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11
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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
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21 """Base classes for building a menu.
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22
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23 These classes have been moved here from menu.py because they are also used
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24 by base_widget.py, and the import sequence caused a JS runtime error."""
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25
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26
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27 import pyjd # this is dummy in pyjs
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28 from sat.core.log import getLogger
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29 log = getLogger(__name__)
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30
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31 from sat.core import exceptions
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32 from pyjamas.ui.MenuBar import MenuBar
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33 from pyjamas.ui.UIObject import UIObject
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34 from pyjamas.ui.MenuItem import MenuItem
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35 from pyjamas import Window
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36
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37 import re
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38
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39
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40 class MenuCmd(object):
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41 """Return an object with an "execute" method that can be set to a menu item callback"""
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42
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43 def __init__(self, object_, handler=None, data=None):
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44 """
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45 @param object_ (object): a callable or a class instance
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46 @param handler (str): method name if object_ is a class instance
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47 @param data (dict): data to pass as the callback argument
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48 """
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49 if handler is None:
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50 assert(callable(object_))
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51 self.callback = object_
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52 else:
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53 self.callback = getattr(object_, handler)
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54 self.data = data
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55
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56 def execute(self):
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57 log.debug("execute %s" % self.callback)
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58 self.callback(self.data) if self.data else self.callback()
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61 class PluginMenuCmd(object):
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62 """Like MenuCmd, but instead of executing a method, it will command the bridge to launch an action"""
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63
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64 def __init__(self, host, action_id, menu_data=None):
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65 self.host = host
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66 self.action_id = action_id
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67 self.menu_data = menu_data
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68
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69 def execute(self):
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70 self.host.launchAction(self.action_id, self.menu_data)
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71
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72
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73 class MenuNode(object):
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74 """MenuNode is a basic data structure to build a menu hierarchy.
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75 When Pyjamas MenuBar and MenuItem defines UI elements, MenuNode
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76 stores the logical relation between them."""
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77
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78 """This class has been introduced to deal with "flattened menus", when you
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79 want the items of a sub-menu to be displayed in the parent menu. It was
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80 needed to break the naive relation of "one MenuBar = one category"."""
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81
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82 def __init__(self, name=None, item=None, menu=None, flat_level=0):
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83 """
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84 @param name (str): node name
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85 @param item (MenuItem): associated menu item
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86 @param menu (GenericMenuBar): associated menu bar
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87 @param flat_level (int): sub-menus until that level see their items
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88 displayed in the parent menu bar, instead of in a callback popup.
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89 """
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90 self.name = name
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91 self.item = item or None # associated menu item
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92 self.menu = menu or None # associated menu bar (sub-menu)
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93 self.flat_level = max(flat_level, -1)
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94 self.children = []
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95
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96 def _getOrCreateCategory(self, path, path_i18n=None, types=None, create=False, sub_menu=None):
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97 """Return the requested category. If create is True, path_i18n and
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98 types are specified, recursively create the category and its parent.
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99
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100 @param path (list[str]): path to the category
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101 @param path_i18n (list[str]): internationalized path to the category
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102 @param types (list[str]): types of the category and its parents
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103 @param create (bool): if True, create the category
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104 @param sub_menu (GenericMenuBar): instance to popup as the category
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105 sub-menu, if it is created. Otherwise keep the previous sub-menu.
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106 @return: MenuNode or None
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107 """
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108 assert(len(path) > 0 and len(path) == len(path_i18n) == len(types))
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109 if len(path) > 1:
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110 cat = self._getOrCreateCategory(path[:1], path_i18n[:1], types[:1], create)
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111 return cat._getOrCreateCategory(path[1:], path_i18n[1:], types[1:], create, sub_menu) if cat else None
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112 cats = [child for child in self.children if child.menu and child.name == path[0]]
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113 if len(cats) == 1:
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114 return cats[0]
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115 assert(cats == []) # there should not be more than 1 category with the same name
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116 if create:
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117 html = self.menu.getCategoryHTML(path_i18n[0], types[0])
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118 sub_menu = sub_menu if sub_menu else GenericMenuBar(self.menu.host, vertical=True)
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119 return self.addItem(html, True, sub_menu, name=path[0])
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120 return None
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121
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122 def getCategories(self, target_path=None):
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123 """Return all the categories of the current node, or those of the
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124 sub-category which is specified by target_path.
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125
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126 @param target_path (list[str]): path to the target node
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127 @return: list[MenuNode]
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128 """
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129 assert(self.menu) # this method applies to category nodes
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130 if target_path:
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131 assert(isinstance(target_path, list))
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132 cat = self._getOrCreateCategory(target_path[:-1])
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133 return cat.getCategories(target_path[-1:]) if cat else None
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134 return [child for child in self.children if child.menu]
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135
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136 def addMenuItem(self, path, path_i18n, types, callback=None, asHTML=False):
502
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137 """Recursively add a new node, which could be a category or a leaf node.
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138
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139 @param path (list[str], str): path to the item
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140 @param path_i18n (list[str], str): internationalized path to the item
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141 @param types (list[str], str): types of the item and its parents
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142 @param callback (MenuCmd, PluginMenuCmd or GenericMenuBar): instance to
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143 execute as a leaf's callback or to popup as a category sub-menu
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144 @param asHTML (boolean): True to display the UI item as HTML
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145 """
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146 log.info("addMenuItem: %s %s %s %s" % (path, path_i18n, types, callback))
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147
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148 leaf_node = hasattr(callback, "execute")
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149 category = isinstance(callback, GenericMenuBar)
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150 assert(not leaf_node or not category)
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151
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152 path = [path] if isinstance(path, str) else path
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153 path_i18n = [path_i18n] if isinstance(path_i18n, str) else path_i18n
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154 types = [types for dummy in range(len(path_i18n))] if isinstance(types, str) else types
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155
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156 if category:
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157 return self._getOrCreateCategory(path, path_i18n, types, True, callback)
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158
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159 if len(path) == len(path_i18n) - 1:
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160 path.append(None) # dummy name for a leaf node
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161
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162 parent = self._getOrCreateCategory(path[:-1], path_i18n[:-1], types[:-1], True)
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163 return parent.addItem(path_i18n[-1], asHTML=asHTML, popup=callback)
502
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164
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165 def addCategory(self, path, path_i18n, types, menu_bar=None):
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166 """Recursively add a new category.
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167
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168 @param path (list[str], str): path to the category
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169 @param path_i18n (list[str], str): internationalized path to the category
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170 @param types (list[str], str): types of the category and its parents
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171 @param menu_bar (GenericMenuBar): instance to popup as the category sub-menu.
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172 """
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173 if menu_bar:
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174 assert(isinstance(menu_bar, GenericMenuBar))
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175 else:
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176 menu_bar = GenericMenuBar(self.menu.host, vertical=True)
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177 return self.addMenuItem(path, path_i18n, types, menu_bar)
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178
502
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179 def addItem(self, item, asHTML=None, popup=None, name=None):
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180 """Add a single child to the current node.
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181
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182 @param item: see MenuBar.addItem
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183 @param asHTML: see MenuBar.addItem
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184 @param popup: see MenuBar.addItem
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185 @param name (str): the item node's name
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186 """
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187 if item is None: # empty string is allowed to set a separator
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188 return None
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189 item = MenuBar.addItem(self.menu, item, asHTML, popup)
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190 node_menu = item.getSubMenu() # node eventually uses it's own menu
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191
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192 # XXX: all the dealing with flattened menus is done here
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193 if self.flat_level > 0:
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194 item.setSubMenu(None) # eventually remove any sub-menu callback
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195 if item.getCommand():
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196 node_menu = None # node isn't a category, it needs no menu
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197 else:
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198 node_menu = self.menu # node uses the menu of its parent
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199 item.setStyleName(self.menu.styles["flattened-category"])
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200
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201 node = MenuNode(name=name, item=item, menu=node_menu, flat_level=self.flat_level - 1)
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202 self.children.append(node)
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203 return node
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204
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diff changeset
205 def addCachedMenus(self, type_, menu_data=None):
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206 """Add cached menus to instance.
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diff changeset
207
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diff changeset
208 @param type_: menu type like in sat.core.sat_main.importMenu
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209 @param menu_data: data to send with these menus
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210 """
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diff changeset
211 menus = self.menu.host.menus.get(type_, [])
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diff changeset
212 for action_id, path, path_i18n in menus:
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diff changeset
213 if len(path) != len(path_i18n):
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diff changeset
214 log.error("inconsistency between menu paths")
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diff changeset
215 continue
517
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diff changeset
216 if isinstance(action_id, str):
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diff changeset
217 callback = PluginMenuCmd(self.menu.host, action_id, menu_data)
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diff changeset
218 elif callable(action_id):
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diff changeset
219 callback = MenuCmd(action_id, data=menu_data)
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220 else:
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221 raise exceptions.InternalError
502
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diff changeset
222 self.addMenuItem(path, path_i18n, 'plugins', callback)
494
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223
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224
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225 class GenericMenuBar(MenuBar):
498
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226 """A menu bar with sub-categories and items"""
494
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227
502
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228 def __init__(self, host, vertical=False, styles=None, flat_level=0, **kwargs):
498
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229 """
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230 @param host (SatWebFrontend): host instance
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231 @param vertical (bool): True to display the popup menu vertically
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232 @param styles (dict): specific styles to be applied:
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233 - key: a value in ('moved_popup', 'menu_bar')
502
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diff changeset
234 - value: a CSS class name
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diff changeset
235 @param flat_level (int): sub-menus until that level see their items
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236 displayed in the parent menu bar instead of in a callback popup.
498
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237 """
494
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238 MenuBar.__init__(self, vertical, **kwargs)
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239 self.host = host
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diff changeset
240 self.styles = {'separator': 'menuSeparator', 'flattened-category': 'menuFlattenedCategory'}
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diff changeset
241 if styles:
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diff changeset
242 self.styles.update(styles)
498
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diff changeset
243 if 'menu_bar' in self.styles:
508
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diff changeset
244 self.setStyleName(self.styles['menu_bar'])
502
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245 self.node = MenuNode(menu=self, flat_level=flat_level)
494
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246
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247 @classmethod
502
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diff changeset
248 def getCategoryHTML(cls, menu_name_i18n, type_):
498
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249 """Build the html to be used for displaying a category item.
494
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250
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diff changeset
251 Inheriting classes may overwrite this method.
502
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diff changeset
252 @param menu_name_i18n (str): internationalized category name
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253 @param type_ (str): category type
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254 @return: str
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255 """
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256 return menu_name_i18n
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257
508
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258 def setStyleName(self, style):
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259 # XXX: pyjamas set the style to object string representation!
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260 # FIXME: fix the bug upstream
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261 menu_style = ['gwt-MenuBar']
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262 menu_style.append(menu_style[0] + '-' + ('vertical' if self.vertical else 'horizontal'))
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263 for classname in style.split(' '):
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264 if classname not in menu_style:
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265 menu_style.append(classname)
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266 UIObject.setStyleName(self, ' '.join(menu_style))
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267
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268 def addStyleName(self, style):
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269 # XXX: same kind of problem then with setStyleName
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270 # FIXME: fix the bug upstream
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271 if not re.search('(^| )%s( |$)' % style, self.getStyleName()):
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272 UIObject.setStyleName(self, self.getStyleName() + ' ' + style)
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273
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274 def removeStyleName(self, style):
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275 # XXX: same kind of problem then with setStyleName
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276 # FIXME: fix the bug upstream
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277 style = re.sub('(^| )%s( |$)' % style, ' ', self.getStyleName()).strip()
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278 UIObject.setStyleName(self, style)
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279
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280 def doItemAction(self, item, fireCommand):
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281 """Overwrites the default behavior for the popup menu to fit in the screen"""
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282 MenuBar.doItemAction(self, item, fireCommand)
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283 if not self.popup:
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284 return
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285 if self.vertical:
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286 # move the popup if it would go over the screen's viewport
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287 max_left = Window.getClientWidth() - self.getOffsetWidth() + 1 - self.popup.getOffsetWidth()
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288 new_left = self.getAbsoluteLeft() - self.popup.getOffsetWidth() + 1
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289 top = item.getAbsoluteTop()
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290 else:
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291 # move the popup if it would go over the menu bar right extremity
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292 max_left = self.getAbsoluteLeft() + self.getOffsetWidth() - self.popup.getOffsetWidth()
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293 new_left = max_left
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294 top = self.getAbsoluteTop() + self.getOffsetHeight() - 1
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295 if item.getAbsoluteLeft() > max_left:
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296 self.popup.setPopupPosition(new_left, top)
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297 # eventually smooth the popup edges to fit the menu own style
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298 if 'moved_popup' in self.styles:
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299 self.popup.addStyleName(self.styles['moved_popup'])
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300
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301 def getCategories(self, parent_path=None):
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302 """Return all the categories items.
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303
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304 @return: list[CategoryItem]
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305 """
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306 return [cat.item for cat in self.node.getCategories(parent_path)]
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307
510
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308 def addMenuItem(self, path, path_i18n, types, menu_cmd, asHTML=False):
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309 return self.node.addMenuItem(path, path_i18n, types, menu_cmd, asHTML).item
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310
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311 def addCategory(self, path, path_i18n, types, menu_bar=None):
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312 return self.node.addCategory(path, path_i18n, types, menu_bar).item
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313
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314 def addItem(self, item, asHTML=None, popup=None):
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315 return self.node.addItem(item, asHTML, popup).item
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316
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317 def addCachedMenus(self, type_, menu_data=None):
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318 self.node.addCachedMenus(type_, menu_data)
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319
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320 def addSeparator(self):
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321 """Add a separator between the categories"""
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322 item = MenuItem(text='', asHTML=None, StyleName=self.styles['separator'])
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323 return self.addItem(item)