/usr/share/pyspread/src/interfaces/pys.py is in pyspread 1.0.1-1.
This file is owned by root:root, with mode 0o644.
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# -*- coding: utf-8 -*-
# Copyright Martin Manns
# Distributed under the terms of the GNU General Public License
# --------------------------------------------------------------------
# pyspread is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# pyspread is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with pyspread. If not, see <http://www.gnu.org/licenses/>.
# --------------------------------------------------------------------
"""
pys
===
This file contains interfaces to the native pys file format.
It is split into the following sections
* shape
* code
* attributes
* row_heights
* col_widths
* macros
"""
import ast
from collections import OrderedDict
import src.lib.i18n as i18n
from itertools import imap
from src.lib.selection import Selection
#use ugettext instead of getttext to avoid unicode errors
_ = i18n.language.ugettext
class Pys(object):
"""Interface between code_array and pys file
The pys file is read from disk with the read method.
The pys file is written to disk with the write method.
Parameters
----------
code_array: model.CodeArray object
\tThe code_array object data structure
pys_file: file
\tFile like object in pys format
"""
def __init__(self, code_array, pys_file):
self.code_array = code_array
self.pys_file = pys_file
self._section2reader = {
"[Pyspread save file version]\n": self._pys_assert_version,
"[shape]\n": self._pys2shape,
"[grid]\n": self._pys2code,
"[attributes]\n": self._pys2attributes,
"[row_heights]\n": self._pys2row_heights,
"[col_widths]\n": self._pys2col_widths,
"[macros]\n": self._pys2macros,
}
self._section2writer = OrderedDict([
("[Pyspread save file version]\n", self._version2pys),
("[shape]\n", self._shape2pys),
("[grid]\n", self._code2pys),
("[attributes]\n", self._attributes2pys),
("[row_heights]\n", self._row_heights2pys),
("[col_widths]\n", self._col_widths2pys),
("[macros]\n", self._macros2pys),
])
def _split_tidy(self, string, maxsplit=None):
"""Rstrips string for \n and splits string for \t"""
if maxsplit is None:
return string.rstrip("\n").split("\t")
else:
return string.rstrip("\n").split("\t", maxsplit)
def _get_key(self, *keystrings):
"""Returns int key tuple from key string list"""
return tuple(imap(int, keystrings))
def _pys_assert_version(self, line):
"""Asserts pys file version"""
if line != "0.1\n":
# Abort if file version not supported
msg = _("File version {version} unsupported (not 0.1).").format(
version=line.strip())
raise ValueError(msg)
def _version2pys(self):
"""Writes pys file version to pys file
Format: <version>\n
"""
self.pys_file.write("0.1\n")
def _shape2pys(self):
"""Writes shape to pys file
Format: <rows>\t<cols>\t<tabs>\n
"""
shape_line = u"\t".join(map(unicode, self.code_array.shape)) + u"\n"
self.pys_file.write(shape_line)
def _pys2shape(self, line):
"""Updates shape in code_array"""
self.code_array.shape = self._get_key(*self._split_tidy(line))
def _code2pys(self):
"""Writes code to pys file
Format: <row>\t<col>\t<tab>\t<code>\n
"""
for key in self.code_array:
key_str = u"\t".join(repr(ele) for ele in key)
code_str = self.code_array(key)
out_str = key_str + u"\t" + code_str + u"\n"
self.pys_file.write(out_str.encode("utf-8"))
def _pys2code(self, line):
"""Updates code in pys code_array"""
row, col, tab, code = self._split_tidy(line, maxsplit=3)
key = self._get_key(row, col, tab)
self.code_array.dict_grid[key] = unicode(code, encoding='utf-8')
def _attributes2pys(self):
"""Writes attributes to pys file
Format:
<selection[0]>\t[...]\t<tab>\t<key>\t<value>\t[...]\n
"""
# Remove doublettes
purged_cell_attributes = []
purged_cell_attributes_keys = []
for selection, tab, attr_dict in self.code_array.cell_attributes:
if purged_cell_attributes_keys and \
(selection, tab) == purged_cell_attributes_keys[-1]:
purged_cell_attributes[-1][2].update(attr_dict)
else:
purged_cell_attributes_keys.append((selection, tab))
purged_cell_attributes.append([selection, tab, attr_dict])
for selection, tab, attr_dict in purged_cell_attributes:
sel_list = [selection.block_tl, selection.block_br,
selection.rows, selection.cols, selection.cells]
tab_list = [tab]
attr_dict_list = []
for key in attr_dict:
attr_dict_list.append(key)
attr_dict_list.append(attr_dict[key])
line_list = map(repr, sel_list + tab_list + attr_dict_list)
self.pys_file.write(u"\t".join(line_list) + u"\n")
def _pys2attributes(self, line):
"""Updates attributes in code_array"""
splitline = self._split_tidy(line)
selection_data = map(ast.literal_eval, splitline[:5])
selection = Selection(*selection_data)
tab = int(splitline[5])
attrs = {}
for col, ele in enumerate(splitline[6:]):
if not (col % 2):
# Odd entries are keys
key = ast.literal_eval(ele)
else:
# Even cols are values
attrs[key] = ast.literal_eval(ele)
self.code_array.cell_attributes.append((selection, tab, attrs))
def _row_heights2pys(self):
"""Writes row_heights to pys file
Format: <row>\t<tab>\t<value>\n
"""
for row, tab in self.code_array.dict_grid.row_heights:
if row < self.code_array.shape[0] and \
tab < self.code_array.shape[2]:
height = self.code_array.dict_grid.row_heights[(row, tab)]
height_strings = map(repr, [row, tab, height])
self.pys_file.write(u"\t".join(height_strings) + u"\n")
def _pys2row_heights(self, line):
"""Updates row_heights in code_array"""
# Split with maxsplit 3
split_line = self._split_tidy(line)
key = row, tab = self._get_key(*split_line[:2])
height = float(split_line[2])
shape = self.code_array.shape
try:
if row < shape[0] and tab < shape[2]:
self.code_array.row_heights[key] = height
except ValueError:
pass
def _col_widths2pys(self):
"""Writes col_widths to pys file
Format: <col>\t<tab>\t<value>\n
"""
for col, tab in self.code_array.dict_grid.col_widths:
if col < self.code_array.shape[1] and \
tab < self.code_array.shape[2]:
width = self.code_array.dict_grid.col_widths[(col, tab)]
width_strings = map(repr, [col, tab, width])
self.pys_file.write(u"\t".join(width_strings) + u"\n")
def _pys2col_widths(self, line):
"""Updates col_widths in code_array"""
# Split with maxsplit 3
split_line = self._split_tidy(line)
key = col, tab = self._get_key(*split_line[:2])
width = float(split_line[2])
shape = self.code_array.shape
try:
if col < shape[1] and tab < shape[2]:
self.code_array.col_widths[key] = width
except ValueError:
pass
def _macros2pys(self):
"""Writes macros to pys file
Format: <macro code line>\n
"""
macros = self.code_array.dict_grid.macros
pys_macros = macros.encode("utf-8")
self.pys_file.write(pys_macros)
def _pys2macros(self, line):
"""Updates macros in code_array"""
if self.code_array.dict_grid.macros and \
self.code_array.dict_grid.macros[-1] != "\n":
# The last macro line does not end with \n
# Therefore, if not new line is inserted, the codeis broken
self.code_array.dict_grid.macros += "\n"
self.code_array.dict_grid.macros += line.decode("utf-8")
# Access via model.py data
# ------------------------
def from_code_array(self):
"""Replaces everything in pys_file from code_array"""
for key in self._section2writer:
self.pys_file.write(key)
self._section2writer[key]()
try:
if self.pys_file.aborted:
break
except AttributeError:
# pys_fileis not opened via fileio.BZAopen
pass
def to_code_array(self):
"""Replaces everything in code_array from pys_file"""
state = None
# Check if version section starts with first line
first_line = True
# Reset pys_file to start to enable multiple calls of this method
self.pys_file.seek(0)
for line in self.pys_file:
if first_line:
# If Version section does not start with first line then
# the file is invalid.
if line == "[Pyspread save file version]\n":
first_line = False
else:
raise ValueError(_("File format unsupported."))
if line in self._section2reader:
state = line
elif state is not None:
self._section2reader[state](line)
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