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presentation_reader.py
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77 lines (68 loc) · 2.75 KB
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# Copyright 2018 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# pylint: disable=E1102
# python3
"""Reads presentation data.
Retrieves a presentation and extracts the placeholders and the presentation's
title.
"""
import re
class PresentationReader(object):
def __init__(self, slides_service, presentation_id):
self._slides_service = slides_service
self._presentation_id = presentation_id
self._presentation = None
def _InitPresentation(self):
if not self._presentation:
self._presentation = self._slides_service.presentations().get(
presentationId=self._presentation_id).execute()
def GetTitle(self):
self._InitPresentation()
return self._presentation.get('title')
def GetAllPlaceholders(self):
self._InitPresentation()
slides = self._presentation.get('slides')
placeholders = []
for slide in slides:
elements = slide.get('pageElements')
for element in elements:
shape = element.get('shape')
table = element.get('table')
# Skip page elements that aren't shapes or tables since they're
# the only types that support text.
if not shape and not table:
continue
if shape:
placeholders += self._GetPlaceholdersFromText(
shape.get('text'))
elif table:
rows = table.get('tableRows')
for row in rows:
cells = row.get('tableCells')
for cell in cells:
placeholders += self._GetPlaceholdersFromText(
cell.get('text'))
# Return the unique placeholders
seen = set()
return [p for p in placeholders if not (p in seen or seen.add(p))]
def _GetPlaceholdersFromText(self, text):
if not text:
return []
placeholders = []
elements = text.get('textElements')
for element in elements:
if element.get('textRun'):
content = element.get('textRun').get('content')
placeholders += re.findall('{.*?}', content)
return placeholders