103 lines
3.4 KiB
Python
103 lines
3.4 KiB
Python
from hashlib import sha1
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from dominate import tags
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from visitor import Visitor
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class BootstrapRenderer(Visitor):
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def __init__(self, html5=True, id=None):
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self.html5 = html5
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self._in_dropdown = False
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self.id = id
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def visit_Navbar(self, node):
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# create a navbar id that is somewhat fixed, but do not leak any
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# information about memory contents to the outside
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node_id = self.id or sha1(str(id(node)).encode()).hexdigest()
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root = tags.nav() if self.html5 else tags.div(role='navigation')
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root['class'] = 'navbar navbar-default'
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cont = root.add(tags.div(_class='container-fluid'))
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# collapse button
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header = cont.add(tags.div(_class='navbar-header'))
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btn = header.add(tags.button())
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btn['type'] = 'button'
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btn['class'] = 'navbar-toggle collapsed'
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btn['data-toggle'] = 'collapse'
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btn['data-target'] = '#' + node_id
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btn['aria-expanded'] = 'false'
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btn['aria-controls'] = 'navbar'
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btn.add(tags.span('Toggle navigation', _class='sr-only'))
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btn.add(tags.span(_class='icon-bar'))
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btn.add(tags.span(_class='icon-bar'))
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btn.add(tags.span(_class='icon-bar'))
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# title may also have a 'get_url()' method, in which case we render
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# a brand-link
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if node.title is not None:
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if hasattr(node.title, 'get_url'):
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header.add(tags.a(node.title.text, _class='navbar-brand',
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href=node.title.get_url()))
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else:
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header.add(tags.span(node.title, _class='navbar-brand'))
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bar = cont.add(tags.div(
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_class='navbar-collapse collapse',
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id=node_id,
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))
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bar_list = bar.add(tags.ul(_class='nav navbar-nav'))
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for item in node.items:
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bar_list.add(self.visit(item))
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return root
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def visit_Text(self, node):
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if not self._in_dropdown:
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return tags.p(node.text, _class='navbar-text')
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return tags.li(node.text, _class='dropdown-header')
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def visit_Link(self, node):
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item = tags.li()
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item.add(tags.a(node.text, href=node.get_url()))
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return item
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def visit_Separator(self, node):
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if not self._in_dropdown:
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raise RuntimeError('Cannot render separator outside Subgroup.')
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return tags.li(role='separator', _class='divider')
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def visit_Subgroup(self, node):
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if not self._in_dropdown:
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li = tags.li(_class='dropdown')
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if node.active:
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li['class'] = 'active'
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a = li.add(tags.a(node.title, href='#', _class='dropdown-toggle'))
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a['data-toggle'] = 'dropdown'
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a['role'] = 'button'
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a['aria-haspopup'] = 'true'
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a['aria-expanded'] = 'false'
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a.add(tags.span(_class='caret'))
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ul = li.add(tags.ul(_class='dropdown-menu'))
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self._in_dropdown = True
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for item in node.items:
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ul.add(self.visit(item))
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self._in_dropdown = False
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return li
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else:
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raise RuntimeError('Cannot render nested Subgroups')
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def visit_View(self, node):
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item = tags.li()
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item.add(tags.a(node.text, href=node.get_url(), title=node.text))
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if node.active:
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item['class'] = 'active'
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return item
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