1 | ## $Id: breadcrumbs.py 12761 2015-03-14 06:17:25Z henrik $ |
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2 | ## |
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3 | ## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann |
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4 | ## This program is free software; you can redistribute it and/or modify |
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5 | ## it under the terms of the GNU General Public License as published by |
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6 | ## the Free Software Foundation; either version 2 of the License, or |
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7 | ## (at your option) any later version. |
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8 | ## |
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9 | ## This program is distributed in the hope that it will be useful, |
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10 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | ## GNU General Public License for more details. |
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13 | ## |
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14 | ## You should have received a copy of the GNU General Public License |
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15 | ## along with this program; if not, write to the Free Software |
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16 | ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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17 | ## |
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18 | """ Components to get breadcrumbs for any object. |
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19 | """ |
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20 | import grok |
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21 | from grokcore.view.interfaces import IGrokView |
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22 | from zope.component import getAdapter |
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23 | |
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24 | from waeup.ikoba.interfaces import IConfigurationContainer |
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25 | from waeup.ikoba.interfaces import MessageFactory as _ |
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26 | from waeup.ikoba.browser.interfaces import ( |
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27 | IBreadcrumb, IBreadcrumbIgnorable, IBreadcrumbContainer, IIkobaObject, |
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28 | ICompany, IUsersContainer, IDataCenter, |
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29 | ) |
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30 | from waeup.ikoba.reports import IReportsContainer |
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31 | |
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32 | |
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33 | class Breadcrumb(grok.Adapter): |
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34 | """A most general breadcrumb generator. |
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35 | """ |
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36 | grok.provides(IBreadcrumb) |
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37 | grok.context(IIkobaObject) |
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38 | grok.name('index') |
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39 | |
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40 | _title = None |
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41 | _parent = 0 |
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42 | _request = None |
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43 | parent_viewname = 'index' |
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44 | viewname = 'index' |
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45 | |
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46 | def __init__(self, context): |
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47 | """Turn a context into a breadcrumb. |
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48 | """ |
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49 | self.context = context |
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50 | |
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51 | @property |
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52 | def title(self): |
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53 | """Get a title for a context. |
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54 | """ |
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55 | if self._title is not None: |
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56 | return self._title |
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57 | if hasattr(self.context, 'title'): |
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58 | return self.context.title |
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59 | if hasattr(self.context, 'name'): |
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60 | return self.context.name |
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61 | return None |
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62 | |
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63 | @property |
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64 | def parent(self): |
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65 | """Get the contexts parent object and viewname or None. |
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66 | """ |
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67 | if self._parent is None: |
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68 | return None |
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69 | if self._parent is not 0: |
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70 | return (self._parent, self.parent_viewname) |
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71 | |
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72 | if self.viewname != 'index': |
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73 | self._parent = self.context |
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74 | else: |
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75 | site = grok.getSite() |
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76 | if self.context is not site: |
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77 | self._parent = getattr(self.context, '__parent__', None) |
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78 | |
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79 | if self._parent is not None: |
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80 | return (self._parent, self.parent_viewname) |
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81 | return None |
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82 | |
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83 | @property |
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84 | def target(self): |
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85 | return self.viewname |
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86 | |
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87 | |
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88 | class CompanyBreadcrumb(Breadcrumb): |
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89 | """A breadcrumb for company index pages. |
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90 | """ |
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91 | grok.context(ICompany) |
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92 | title = _(u'Home') |
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93 | parent = None |
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94 | |
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95 | |
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96 | class PortalSettingsBreadcrumb(Breadcrumb): |
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97 | """A breadcrumb for the manage view of universities. |
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98 | |
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99 | Here we need a special `parent()` implementation, because the |
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100 | parent object is not a real parent (the Company object has no |
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101 | valid parent in terms of breadcrumbs). Instead it is the |
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102 | ``administration`` view of the same context the ``manage`` page |
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103 | itself is bound to. |
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104 | """ |
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105 | grok.context(ICompany) |
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106 | grok.name('manage') |
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107 | title = _(u'Portal Settings') |
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108 | |
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109 | @property |
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110 | def parent(self): |
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111 | """Return the 'administration' view of our context as parent. |
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112 | """ |
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113 | return (self.context, 'administration') |
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114 | |
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115 | |
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116 | class AdministrationBreadcrumb(Breadcrumb): |
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117 | """A breadcrumb for administration areas of Company instances. |
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118 | """ |
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119 | grok.context(ICompany) |
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120 | grok.name('administration') |
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121 | title = _(u'Administration') |
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122 | viewname = 'administration' |
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123 | |
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124 | |
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125 | class ConfigurationContainerBreadcrumb(Breadcrumb): |
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126 | """A breadcrumb for the configuration container. |
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127 | """ |
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128 | grok.context(IConfigurationContainer) |
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129 | title = _(u'Portal Configuration') |
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130 | parent_viewname = 'administration' |
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131 | |
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132 | |
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133 | class UsersContainerBreadcrumb(Breadcrumb): |
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134 | """A breadcrumb for user containers. |
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135 | """ |
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136 | grok.context(IUsersContainer) |
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137 | title = _(u'Officers') |
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138 | parent_viewname = 'administration' |
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139 | |
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140 | |
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141 | class DataCenterBreadcrumb(Breadcrumb): |
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142 | """A breadcrumb for data centers. |
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143 | """ |
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144 | grok.context(IDataCenter) |
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145 | title = _(u'Data Center') |
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146 | parent_viewname = 'administration' |
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147 | |
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148 | |
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149 | class ReportsBreadcrumb(Breadcrumb): |
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150 | """A breadcrumb for reports. |
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151 | """ |
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152 | grok.context(IReportsContainer) |
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153 | title = _(u'Reports') |
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154 | parent_viewname = 'administration' |
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155 | target = None |
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156 | |
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157 | |
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158 | def getBreadcrumb(obj, viewname=None): |
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159 | """ Get a breadcrumb for an object and a viewname. |
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160 | |
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161 | If there is no breadcrumb defined for such a combination, a |
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162 | breadcrumb for the ``index`` view will be looked up. |
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163 | """ |
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164 | try: |
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165 | return getAdapter(obj, IBreadcrumb, name=viewname) |
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166 | except: |
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167 | pass |
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168 | return getAdapter(obj, IBreadcrumb, name='index') |
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169 | |
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170 | |
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171 | def getBreadcrumbList(obj, viewname): |
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172 | """Get an ordered list of breadcrumbs for an object and a viewname. |
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173 | |
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174 | Ignorables are excluded from the result. |
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175 | """ |
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176 | current = getBreadcrumb(obj, viewname) |
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177 | result = [current] |
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178 | while current.parent is not None: |
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179 | context, viewname = current.parent |
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180 | current = getBreadcrumb(context, viewname) |
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181 | if IBreadcrumbIgnorable.providedBy(current): |
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182 | # Ignore empty breadcrumbs... |
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183 | continue |
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184 | result.append(current) |
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185 | result.reverse() |
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186 | return result |
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187 | |
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188 | |
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189 | def getBreadcrumbListForView(view): |
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190 | """Get an ordered list of breadcrumbs a certain view. |
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191 | |
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192 | Ignorables are excluded from the result. |
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193 | """ |
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194 | context = getattr(view, 'context') |
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195 | viewname = getattr(view, '__name__') |
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196 | return getBreadcrumbList(context, viewname) |
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197 | |
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198 | |
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199 | class BreadcrumbContainer(grok.Adapter): |
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200 | """An adapter to adapt grok views to list of breadcrumbs. |
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201 | """ |
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202 | grok.context(IGrokView) |
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203 | grok.provides(IBreadcrumbContainer) |
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204 | |
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205 | _breadcrumbs = None |
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206 | |
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207 | def __init__(self, context): |
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208 | self.context = context |
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209 | self._breadcrumbs = getBreadcrumbListForView(self.context) |
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210 | |
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211 | def __iter__(self): |
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212 | """Allow iteration. |
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213 | """ |
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214 | return self._breadcrumbs.__iter__() |
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215 | |
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216 | def getList(self): |
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217 | """Get the (ordered) list of breadcrumbs liked to the context view. |
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218 | """ |
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219 | return self._breadcrumbs |
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