/usr/lib/python2.7/dist-packages/openpyxl/writer/excel.py is in python-openpyxl 2.3.0-1.
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# Copyright (c) 2010-2015 openpyxl
"""Write a .xlsx file."""
# Python stdlib imports
from io import BytesIO
from re import match
from zipfile import ZipFile, ZIP_DEFLATED
# package imports
from openpyxl.xml.constants import (
ARC_SHARED_STRINGS,
ARC_CONTENT_TYPES,
ARC_ROOT_RELS,
ARC_WORKBOOK_RELS,
ARC_APP, ARC_CORE,
ARC_THEME,
ARC_STYLE,
ARC_WORKBOOK,
PACKAGE_WORKSHEETS,
PACKAGE_CHARTSHEETS,
PACKAGE_DRAWINGS,
PACKAGE_CHARTS,
PACKAGE_IMAGES,
PACKAGE_XL
)
from openpyxl.drawing.spreadsheet_drawing import SpreadsheetDrawing
from openpyxl.xml.functions import tostring
from openpyxl.packaging.manifest import write_content_types
from openpyxl.writer.strings import write_string_table
from openpyxl.writer.workbook import (
write_root_rels,
write_workbook_rels,
write_properties_app,
write_workbook
)
from openpyxl.workbook.properties import write_properties
from openpyxl.writer.theme import write_theme
from openpyxl.writer.styles import StyleWriter
from .relations import write_rels
from openpyxl.writer.worksheet import write_worksheet
from openpyxl.workbook.names.external import (
write_external_link,
write_external_book_rel
)
from openpyxl.writer.comments import CommentWriter
ARC_VBA = ('xl/vba', r'xl/drawings/.*vmlDrawing\d\.vml', 'xl/ctrlProps', 'customUI',
'xl/activeX', r'xl/media/.*\.emf')
class ExcelWriter(object):
"""Write a workbook object to an Excel file."""
comment_writer = CommentWriter
def __init__(self, workbook):
self.workbook = workbook
self.workbook._drawings = []
self.style_writer = StyleWriter(workbook)
def write_data(self, archive, as_template=False):
"""Write the various xml files into the zip archive."""
# cleanup all worksheets
archive.writestr(ARC_ROOT_RELS, write_root_rels(self.workbook))
archive.writestr(ARC_WORKBOOK_RELS, write_workbook_rels(self.workbook))
archive.writestr(ARC_APP, write_properties_app(self.workbook))
archive.writestr(ARC_CORE, write_properties(self.workbook.properties))
if self.workbook.loaded_theme:
archive.writestr(ARC_THEME, self.workbook.loaded_theme)
else:
archive.writestr(ARC_THEME, write_theme())
archive.writestr(ARC_WORKBOOK, write_workbook(self.workbook))
if self.workbook.vba_archive:
vba_archive = self.workbook.vba_archive
for name in vba_archive.namelist():
for s in ARC_VBA:
if match(s, name):
archive.writestr(name, vba_archive.read(name))
break
self._write_charts(archive)
self._write_images(archive)
self._write_worksheets(archive)
self._write_chartsheets(archive)
self._write_string_table(archive)
self._write_external_links(archive)
archive.writestr(ARC_STYLE, self.style_writer.write_table())
manifest = write_content_types(self.workbook, as_template=as_template)
archive.writestr(ARC_CONTENT_TYPES, tostring(manifest.to_tree()))
def _write_string_table(self, archive):
archive.writestr(ARC_SHARED_STRINGS,
write_string_table(self.workbook.shared_strings))
def _write_images(self, archive):
for idx, ref in enumerate(self.workbook._images, 1):
img = ref()
if img is None:
continue
buf = BytesIO()
img.image.save(buf, format='PNG')
img._id = idx
archive.writestr(img._path, buf.getvalue())
def _write_charts(self, archive):
for idx, ref in enumerate(self.workbook._charts, 1):
chart = ref()
if not chart:
continue
chart._id = idx
archive.writestr(chart._path, tostring(chart._write()))
def _write_chartsheets(self, archive):
from openpyxl.packaging.relationship import Relationship, RelationshipList
from openpyxl.worksheet.drawing import Drawing
for idx, sheet in enumerate(self.workbook.chartsheets, 1):
if sheet._charts:
drawing = SpreadsheetDrawing()
drawing.charts = sheet._charts
self.workbook._drawings.append(drawing)
drawing_id = len(self.workbook._drawings)
drawingpath = "{0}/drawing{1}.xml".format(PACKAGE_DRAWINGS, drawing_id)
archive.writestr(drawingpath, tostring(drawing._write()))
archive.writestr(
"{0}/_rels/drawing{1}.xml.rels".format(
PACKAGE_DRAWINGS, drawing_id),
tostring(drawing._write_rels())
)
rel = Relationship(type="drawing", target="/" + drawingpath)
rels = RelationshipList()
rels.append(rel)
tree = rels.to_tree()
sheet.drawing.id = "rId{0}".format(len(rels))
archive.writestr(PACKAGE_CHARTSHEETS +
'/_rels/sheet%d.xml.rels' % idx, tostring(tree)
)
xml = tostring(sheet.to_tree())
archive.writestr(PACKAGE_CHARTSHEETS + '/sheet%d.xml' % idx, xml)
def _write_worksheets(self, archive):
comments_id = 0
vba_controls_id = 0
for i, sheet in enumerate(self.workbook.worksheets, 1):
xml = sheet._write(self.workbook.shared_strings)
archive.writestr(PACKAGE_WORKSHEETS + '/sheet%d.xml' % i , xml)
if sheet._charts or sheet._images:
drawing = SpreadsheetDrawing()
drawing.charts = sheet._charts
drawing.images = sheet._images
self.workbook._drawings.append(drawing)
drawing_id = len(self.workbook._drawings)
drawingpath = "{0}/drawing{1}.xml".format(PACKAGE_DRAWINGS, drawing_id)
archive.writestr(drawingpath, tostring(drawing._write()))
archive.writestr("{0}/_rels/drawing{1}.xml.rels".format(PACKAGE_DRAWINGS,
drawing_id), tostring(drawing._write_rels()))
for r in sheet._rels:
if "drawing" in r.type:
r.target = "/" + drawingpath
if sheet._comment_count > 0:
comments_id += 1
cw = self.comment_writer(sheet)
archive.writestr(PACKAGE_XL + '/comments%d.xml' % comments_id,
cw.write_comments())
archive.writestr(PACKAGE_XL + '/drawings/commentsDrawing%d.vml' % comments_id,
cw.write_comments_vml())
if sheet.vba_controls is not None:
vba_controls_id += 1
if (sheet._rels
or sheet._comment_count > 0
or sheet.vba_controls is not None):
rels = write_rels(sheet, comments_id=comments_id, vba_controls_id=vba_controls_id)
archive.writestr(PACKAGE_WORKSHEETS +
'/_rels/sheet%d.xml.rels' % i, tostring(rels))
def _write_external_links(self, archive):
"""Write links to external workbooks"""
wb = self.workbook
for idx, book in enumerate(wb._external_links, 1):
el = write_external_link(book.links)
rel = write_external_book_rel(book)
archive.writestr(
"{0}/externalLinks/externalLink{1}.xml".format(PACKAGE_XL, idx),
tostring(el)
)
archive.writestr(
"{0}/externalLinks/_rels/externalLink{1}.xml.rels".format(PACKAGE_XL, idx),
tostring(rel)
)
def save(self, filename, as_template=False):
"""Write data into the archive."""
archive = ZipFile(filename, 'w', ZIP_DEFLATED, allowZip64=True)
self.write_data(archive, as_template=as_template)
archive.close()
def save_workbook(workbook, filename, as_template=False):
"""Save the given workbook on the filesystem under the name filename.
:param workbook: the workbook to save
:type workbook: :class:`openpyxl.workbook.Workbook`
:param filename: the path to which save the workbook
:type filename: string
:rtype: bool
"""
writer = ExcelWriter(workbook)
writer.save(filename, as_template=as_template)
return True
def save_virtual_workbook(workbook, as_template=False):
"""Return an in-memory workbook, suitable for a Django response."""
writer = ExcelWriter(workbook)
temp_buffer = BytesIO()
try:
archive = ZipFile(temp_buffer, 'w', ZIP_DEFLATED, allowZip64=True)
writer.write_data(archive, as_template=as_template)
finally:
archive.close()
virtual_workbook = temp_buffer.getvalue()
temp_buffer.close()
return virtual_workbook
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