/usr/share/pyshared/openpyxl/writer/excel.py is in python-openpyxl 1.7.0+ds1-1.
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# Copyright (c) 2010-2011 openpyxl
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# @license: http://www.opensource.org/licenses/mit-license.php
# @author: see AUTHORS file
"""Write a .xlsx file."""
# Python stdlib imports
from zipfile import ZipFile, ZIP_DEFLATED
# compatibility imports
from openpyxl.shared.compat import BytesIO, StringIO
# package imports
from openpyxl.shared.ooxml import ARC_SHARED_STRINGS, ARC_CONTENT_TYPES, \
ARC_ROOT_RELS, ARC_WORKBOOK_RELS, ARC_APP, ARC_CORE, ARC_THEME, \
ARC_STYLE, ARC_WORKBOOK, ARC_VBA,\
PACKAGE_WORKSHEETS, PACKAGE_DRAWINGS, PACKAGE_CHARTS, PACKAGE_IMAGES
from openpyxl.writer.strings import create_string_table, write_string_table
from openpyxl.writer.workbook import write_content_types, write_root_rels, \
write_workbook_rels, write_properties_app, write_properties_core, \
write_workbook
from openpyxl.writer.theme import write_theme
from openpyxl.writer.styles import StyleWriter
from openpyxl.writer.drawings import DrawingWriter, ShapeWriter
from openpyxl.writer.charts import ChartWriter
from openpyxl.writer.worksheet import write_worksheet, write_worksheet_rels
class ExcelWriter(object):
"""Write a workbook object to an Excel file."""
def __init__(self, workbook):
self.workbook = workbook
self.style_writer = StyleWriter(self.workbook)
def write_data(self, archive):
"""Write the various xml files into the zip archive."""
# cleanup all worksheets
shared_string_table = self._write_string_table(archive)
archive.writestr(ARC_CONTENT_TYPES, write_content_types(self.workbook))
if not self.workbook.vba_archive:
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_core(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_STYLE, self.style_writer.write_table())
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 name.startswith(s):
archive.writestr(name, vba_archive.read(name))
break
self._write_worksheets(archive, shared_string_table, self.style_writer)
def _write_string_table(self, archive):
for ws in self.workbook.worksheets:
ws.garbage_collect()
shared_string_table = create_string_table(self.workbook)
archive.writestr(ARC_SHARED_STRINGS,
write_string_table(shared_string_table))
return shared_string_table
def _write_worksheets(self, archive, shared_string_table, style_writer):
drawing_id = 1
chart_id = 1
image_id = 1
shape_id = 1
for i, sheet in enumerate(self.workbook.worksheets):
archive.writestr(PACKAGE_WORKSHEETS + '/sheet%d.xml' % (i + 1),
write_worksheet(sheet, shared_string_table,
style_writer.get_style_by_hash()))
if sheet._charts or sheet._images or sheet.relationships:
archive.writestr(PACKAGE_WORKSHEETS +
'/_rels/sheet%d.xml.rels' % (i + 1),
write_worksheet_rels(sheet, drawing_id))
if sheet._charts or sheet._images:
dw = DrawingWriter(sheet)
archive.writestr(PACKAGE_DRAWINGS + '/drawing%d.xml' % drawing_id,
dw.write())
archive.writestr(PACKAGE_DRAWINGS + '/_rels/drawing%d.xml.rels' % drawing_id,
dw.write_rels(chart_id, image_id))
drawing_id += 1
for chart in sheet._charts:
cw = ChartWriter(chart)
archive.writestr(PACKAGE_CHARTS + '/chart%d.xml' % chart_id,
cw.write())
if chart._shapes:
archive.writestr(PACKAGE_CHARTS + '/_rels/chart%d.xml.rels' % chart_id,
cw.write_rels(drawing_id))
sw = ShapeWriter(chart._shapes)
archive.writestr(PACKAGE_DRAWINGS + '/drawing%d.xml' % drawing_id,
sw.write(shape_id))
shape_id += len(chart._shapes)
drawing_id += 1
chart_id += 1
for img in sheet._images:
buf = StringIO()
img.image.save(buf, format= 'PNG')
archive.writestr(PACKAGE_IMAGES + '/image%d.png' % image_id, buf.getvalue())
image_id += 1
def save(self, filename):
"""Write data into the archive."""
archive = ZipFile(filename, 'w', ZIP_DEFLATED)
self.write_data(archive)
archive.close()
def save_workbook(workbook, filename):
"""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)
return True
def save_virtual_workbook(workbook):
"""Return an in-memory workbook, suitable for a Django response."""
writer = ExcelWriter(workbook)
temp_buffer = BytesIO()
try:
archive = ZipFile(temp_buffer, 'w', ZIP_DEFLATED)
writer.write_data(archive)
finally:
archive.close()
virtual_workbook = temp_buffer.getvalue()
temp_buffer.close()
return virtual_workbook
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