author | Alex Gilkes <alex.gilkes@nokia.com> |
Wed, 28 Oct 2009 14:39:48 +0000 | |
changeset 1 | be27ed110b50 |
permissions | -rw-r--r-- |
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# $Id: misc.py 4564 2006-05-21 20:44:42Z wiemann $ |
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# Author: David Goodger <goodger@python.org> |
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# Copyright: This module has been placed in the public domain. |
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""" |
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Miscellaneous transforms. |
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""" |
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__docformat__ = 'reStructuredText' |
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from docutils import nodes |
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from docutils.transforms import Transform, TransformError |
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class CallBack(Transform): |
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|
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""" |
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Inserts a callback into a document. The callback is called when the |
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transform is applied, which is determined by its priority. |
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|
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For use with `nodes.pending` elements. Requires a ``details['callback']`` |
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entry, a bound method or function which takes one parameter: the pending |
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node. Other data can be stored in the ``details`` attribute or in the |
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object hosting the callback method. |
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""" |
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|
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default_priority = 990 |
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|
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def apply(self): |
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pending = self.startnode |
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pending.details['callback'](pending) |
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pending.parent.remove(pending) |
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|
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class ClassAttribute(Transform): |
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|
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""" |
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Move the "class" attribute specified in the "pending" node into the |
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immediately following non-comment element. |
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""" |
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|
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default_priority = 210 |
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|
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def apply(self): |
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pending = self.startnode |
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parent = pending.parent |
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child = pending |
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while parent: |
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# Check for appropriate following siblings: |
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for index in range(parent.index(child) + 1, len(parent)): |
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element = parent[index] |
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if (isinstance(element, nodes.Invisible) or |
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isinstance(element, nodes.system_message)): |
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continue |
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element['classes'] += pending.details['class'] |
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pending.parent.remove(pending) |
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return |
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else: |
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# At end of section or container; apply to sibling |
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child = parent |
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parent = parent.parent |
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error = self.document.reporter.error( |
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'No suitable element following "%s" directive' |
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% pending.details['directive'], |
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nodes.literal_block(pending.rawsource, pending.rawsource), |
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line=pending.line) |
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pending.replace_self(error) |
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|
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|
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class Transitions(Transform): |
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|
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""" |
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Move transitions at the end of sections up the tree. Complain |
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on transitions after a title, at the beginning or end of the |
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document, and after another transition. |
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|
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For example, transform this:: |
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|
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<section> |
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... |
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<transition> |
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<section> |
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... |
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|
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into this:: |
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|
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<section> |
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... |
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<transition> |
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<section> |
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... |
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""" |
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|
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default_priority = 830 |
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|
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def apply(self): |
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for node in self.document.traverse(nodes.transition): |
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self.visit_transition(node) |
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def visit_transition(self, node): |
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index = node.parent.index(node) |
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error = None |
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if (index == 0 or |
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isinstance(node.parent[0], nodes.title) and |
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(index == 1 or |
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isinstance(node.parent[1], nodes.subtitle) and |
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index == 2)): |
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assert (isinstance(node.parent, nodes.document) or |
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isinstance(node.parent, nodes.section)) |
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error = self.document.reporter.error( |
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'Document or section may not begin with a transition.', |
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line=node.line) |
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elif isinstance(node.parent[index - 1], nodes.transition): |
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error = self.document.reporter.error( |
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'At least one body element must separate transitions; ' |
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'adjacent transitions are not allowed.', line=node.line) |
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if error: |
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# Insert before node and update index. |
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node.parent.insert(index, error) |
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index += 1 |
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assert index < len(node.parent) |
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if index != len(node.parent) - 1: |
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# No need to move the node. |
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return |
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# Node behind which the transition is to be moved. |
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sibling = node |
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127 |
# While sibling is the last node of its parent. |
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Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
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128 |
while index == len(sibling.parent) - 1: |
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Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
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|
129 |
sibling = sibling.parent |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
130 |
# If sibling is the whole document (i.e. it has no parent). |
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Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
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|
131 |
if sibling.parent is None: |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
132 |
# Transition at the end of document. Do not move the |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
133 |
# transition up, and place an error behind. |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
134 |
error = self.document.reporter.error( |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
135 |
'Document may not end with a transition.', |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
136 |
line=node.line) |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
137 |
node.parent.insert(node.parent.index(node) + 1, error) |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
138 |
return |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
139 |
index = sibling.parent.index(sibling) |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
140 |
# Remove the original transition node. |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
141 |
node.parent.remove(node) |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
142 |
# Insert the transition after the sibling. |
be27ed110b50
Bringing in Helium, imaker and cmaker
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff
changeset
|
143 |
sibling.parent.insert(index + 1, node) |