Mercurial > libervia-web
annotate src/browser/sat_browser/base_menu.py @ 1102:8b70c838ed14
login (logged): set guest_session and session_started template variables
author | Goffi <goffi@goffi.org> |
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date | Fri, 01 Jun 2018 18:33:14 +0200 |
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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 |
1054 | 5 # Copyright (C) 2011-2018 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 from sat.core.log import getLogger |
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28 log = getLogger(__name__) |
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29 |
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30 from pyjamas.ui.MenuBar import MenuBar |
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31 from pyjamas.ui.MenuItem import MenuItem |
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32 from pyjamas import Window |
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33 from sat_frontends.quick_frontend import quick_menus |
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34 from sat_browser import html_tools |
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35 |
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36 |
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37 unicode = str # FIXME: pyjamas workaround |
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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, menu_item, caller=None): |
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44 """ |
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45 @param menu_item(quick_menu.MenuItem): instance of a callbable MenuItem |
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46 @param caller: menu caller |
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47 """ |
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48 self.item = menu_item |
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49 self._caller = caller |
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50 |
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51 def execute(self): |
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52 self.item.call(self._caller) |
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53 |
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54 |
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55 class SimpleCmd(object): |
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56 """Return an object with an "executre" method that launch a callback""" |
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57 |
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58 def __init__(self, callback): |
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59 """ |
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60 @param callback: method to call when menu is selected |
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61 """ |
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62 self.callback = callback |
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63 |
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64 def execute(self): |
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65 self.callback() |
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66 |
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67 |
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68 class GenericMenuBar(MenuBar): |
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69 """A menu bar with sub-categories and items""" |
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70 |
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71 def __init__(self, host, vertical=False, styles=None, flat_level=0, **kwargs): |
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72 """ |
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73 @param host (SatWebFrontend): host instance |
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74 @param vertical (bool): True to display the popup menu vertically |
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75 @param styles (dict): specific styles to be applied: |
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76 - key: a value in ('moved_popup', 'menu_bar') |
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77 - value: a CSS class name |
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78 @param flat_level (int): sub-menus until that level see their items |
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79 displayed in the parent menu bar instead of in a callback popup. |
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80 """ |
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81 MenuBar.__init__(self, vertical, **kwargs) |
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82 self.host = host |
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83 self.styles = {} |
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84 if styles: |
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85 self.styles.update(styles) |
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86 try: |
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87 self.setStyleName(self.styles['menu_bar']) |
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88 except KeyError: |
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89 pass |
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90 self.menus_container = None |
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91 self.flat_level = flat_level |
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92 |
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93 def update(self, type_, caller=None): |
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94 """Method to call when menus have changed |
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95 |
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96 @param type_: menu type like in sat.core.sat_main.importMenu |
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97 @param caller: instance linked to the menus |
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98 """ |
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99 self.menus_container = self.host.menus.getMainContainer(type_) |
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100 self._caller=caller |
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101 self.createMenus() |
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102 |
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103 @classmethod |
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104 def getCategoryHTML(cls, category): |
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105 """Build the html to be used for displaying a category item. |
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106 |
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107 Inheriting classes may overwrite this method. |
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108 @param category (quick_menus.MenuCategory): category to add |
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109 @return unicode: HTML to display |
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110 """ |
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111 return html_tools.html_sanitize(category.name) |
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112 |
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113 def _buildMenus(self, container, flat_level, caller=None): |
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114 """Recursively build menus of the container |
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115 |
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116 @param container: a quick_menus.MenuContainer instance |
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117 @param caller: instance linked to the menus |
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118 """ |
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119 for child in container.getActiveMenus(): |
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120 if isinstance(child, quick_menus.MenuContainer): |
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121 item = self.addCategory(child, flat=bool(flat_level)) |
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122 submenu = item.getSubMenu() |
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123 if submenu is None: |
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124 submenu = self |
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125 submenu._buildMenus(child, flat_level-1 if flat_level else 0, caller) |
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126 elif isinstance(child, quick_menus.MenuSeparator): |
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127 item = MenuItem(text='', asHTML=None, StyleName="menuSeparator") |
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128 self.addItem(item) |
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129 elif isinstance(child, quick_menus.MenuItem): |
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130 self.addItem(child.name, False, MenuCmd(child, caller) if child.CALLABLE else None) |
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131 else: |
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132 log.error(u"Unknown child type: {}".format(child)) |
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133 |
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134 def createMenus(self): |
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135 self.clearItems() |
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136 if self.menus_container is None: |
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137 log.debug("Menu is empty") |
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138 return |
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139 self._buildMenus(self.menus_container, self.flat_level, self._caller) |
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140 |
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141 def doItemAction(self, item, fireCommand): |
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142 """Overwrites the default behavior for the popup menu to fit in the screen""" |
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143 MenuBar.doItemAction(self, item, fireCommand) |
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144 if not self.popup: |
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145 return |
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146 if self.vertical: |
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147 # move the popup if it would go over the screen's viewport |
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148 max_left = Window.getClientWidth() - self.getOffsetWidth() + 1 - self.popup.getOffsetWidth() |
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149 new_left = self.getAbsoluteLeft() - self.popup.getOffsetWidth() + 1 |
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150 top = item.getAbsoluteTop() |
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151 else: |
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152 # move the popup if it would go over the menu bar right extremity |
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153 max_left = self.getAbsoluteLeft() + self.getOffsetWidth() - self.popup.getOffsetWidth() |
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154 new_left = max_left |
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155 top = self.getAbsoluteTop() + self.getOffsetHeight() - 1 |
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156 if item.getAbsoluteLeft() > max_left: |
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157 self.popup.setPopupPosition(new_left, top) |
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158 # eventually smooth the popup edges to fit the menu own style |
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159 try: |
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160 self.popup.addStyleName(self.styles['moved_popup']) |
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161 except KeyError: |
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162 pass |
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163 |
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164 def addCategory(self, category, menu_bar=None, flat=False): |
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165 """Add a new category. |
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166 |
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167 @param category (quick_menus.MenuCategory): category to add |
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168 @param menu_bar (GenericMenuBar): instance to popup as the category sub-menu. |
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169 """ |
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170 html = self.getCategoryHTML(category) |
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171 |
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172 if menu_bar is not None: |
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173 assert not flat # can't have a menu_bar and be flat at the same time |
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174 sub_menu = menu_bar |
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175 elif not flat: |
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176 sub_menu = GenericMenuBar(self.host, vertical=True) |
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177 else: |
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178 sub_menu = None |
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179 |
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180 item = self.addItem(html, True, sub_menu) |
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181 if flat: |
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182 item.setStyleName("menuFlattenedCategory") |
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183 return item |