Mercurial > libervia-web

annotate src/browser/sat_browser/base_menu.py @ 979:1d558dfb32ca

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server: pages redirection: when using a redirection dict, a new "page" key can be used to redirect to a named page. "args" can be added to specified named arguments to set (will be put in request.args, in addition to existing ones). The redirection is done dynamically, during the request workflow.
author Goffi <goffi@goffi.org>
date Sun, 12 Nov 2017 12:56:46 +0100
parents fd4eae654182
children f2170536ba23
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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) 2011-2017 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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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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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
676
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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