def iter_valid_rels():
"""Filter out broken relationships such as those pointing to NULL."""
for rel_elm in xml_rels.relationship_lst:
# --- Occasionally a PowerPoint plugin or other client will "remove"
# --- a relationship simply by "voiding" its Target value, like making
# --- it "/ppt/slides/NULL". Skip any relationships linking to a
# --- partname that is not present in the package.
if rel_elm.targetMode == RTM.INTERNAL:
partname = PackURI.from_rel_ref(base_uri,
rel_elm.target_ref)
if partname not in parts:
continue
yield _Relationship.from_xml(base_uri, rel_elm, parts)
def load_rels(source_partname, rels):
"""Populate `xml_rels` dict by traversing relationships depth-first."""
xml_rels[source_partname] = rels
visited_partnames.add(source_partname)
base_uri = source_partname.baseURI
# --- recursion stops when there are no unvisited partnames in rels ---
for rel in rels:
if rel.targetMode == RTM.EXTERNAL:
continue
target_partname = PackURI.from_rel_ref(base_uri,
rel.target_ref)
if target_partname in visited_partnames:
continue
load_rels(target_partname, self._xml_rels_for(target_partname))
def from_xml(cls, base_uri, rel, parts):
"""Return |_Relationship| object based on CT_Relationship element `rel`."""
target = (rel.target_ref if rel.targetMode == RTM.EXTERNAL else
parts[PackURI.from_rel_ref(base_uri, rel.target_ref)])
return cls(base_uri, rel.rId, rel.reltype, rel.targetMode, target)
def it_can_construct_from_relative_ref(self):
baseURI = '/ppt/slides'
relative_ref = '../slideLayouts/slideLayout1.xml'
pack_uri = PackURI.from_rel_ref(baseURI, relative_ref)
assert pack_uri == '/ppt/slideLayouts/slideLayout1.xml'
def it_can_construct_from_relative_ref(self):
pack_uri = PackURI.from_rel_ref(
"/ppt/slides", "../slideLayouts/slideLayout1.xml"
)
assert pack_uri == "/ppt/slideLayouts/slideLayout1.xml"
