"""
Created on Thu Jun 28 17:44:45 2012
@author: pietro
"""
import ctypes
import grass.lib.raster as libraster
import datetime
from grass.script.utils import encode
from grass.pygrass.utils import decode
[docs]class History(object):
"""History class help to manage all the metadata of a raster map"""
def __init__(
self,
name,
mapset="",
mtype="",
creator="",
src1="",
src2="",
keyword="",
date="",
title="",
):
self.c_hist = ctypes.pointer(libraster.History())
# 'Tue Nov 7 01:11:23 2006'
self.date_fmt = "%a %b %d %H:%M:%S %Y"
self.name = name
self.mapset = mapset
self.mtype = mtype
self.creator = creator
self.src1 = src1
self.src2 = src2
self.keyword = keyword
self.date = date
self.title = title
self.attrs = [
"name",
"mapset",
"mtype",
"creator",
"src1",
"src2",
"keyword",
"date",
"title",
]
def __repr__(self):
return "History(%s)" % ", ".join(
["%s=%r" % (attr, getattr(self, attr)) for attr in self.attrs]
)
def __del__(self):
"""Rast_free_history"""
pass
def __eq__(self, hist):
for attr in self.attrs:
if getattr(self, attr) != getattr(hist, attr):
return False
return True
def __len__(self):
return self.length()
def __iter__(self):
return ((attr, getattr(self, attr)) for attr in self.attrs)
# ----------------------------------------------------------------------
# libraster.HIST_CREATOR
def _get_creator(self):
return decode(libraster.Rast_get_history(self.c_hist, libraster.HIST_CREATOR))
def _set_creator(self, creator):
creator = encode(creator)
return libraster.Rast_set_history(
self.c_hist, libraster.HIST_CREATOR, ctypes.c_char_p(creator)
)
creator = property(
fget=_get_creator, fset=_set_creator, doc="Set or obtain the creator of map"
)
# ----------------------------------------------------------------------
# libraster.HIST_DATSRC_1
def _get_src1(self):
return decode(libraster.Rast_get_history(self.c_hist, libraster.HIST_DATSRC_1))
def _set_src1(self, src1):
src1 = encode(src1)
return libraster.Rast_set_history(
self.c_hist, libraster.HIST_DATSRC_1, ctypes.c_char_p(src1)
)
src1 = property(
fget=_get_src1, fset=_set_src1, doc="Set or obtain the first source of map"
)
# ----------------------------------------------------------------------
# libraster.HIST_DATSRC_2
def _get_src2(self):
return decode(libraster.Rast_get_history(self.c_hist, libraster.HIST_DATSRC_2))
def _set_src2(self, src2):
src2 = encode(src2)
return libraster.Rast_set_history(
self.c_hist, libraster.HIST_DATSRC_2, ctypes.c_char_p(src2)
)
src2 = property(
fget=_get_src2, fset=_set_src2, doc="Set or obtain the second source of map"
)
# ----------------------------------------------------------------------
# libraster.HIST_KEYWORD
def _get_keyword(self):
return decode(libraster.Rast_get_history(self.c_hist, libraster.HIST_KEYWRD))
def _set_keyword(self, keyword):
keyword = encode(keyword)
return libraster.Rast_set_history(
self.c_hist, libraster.HIST_KEYWRD, ctypes.c_char_p(keyword)
)
keyword = property(
fget=_get_keyword, fset=_set_keyword, doc="Set or obtain the keywords of map"
)
# ----------------------------------------------------------------------
# libraster.HIST_MAPID
def _get_date(self):
date_str = decode(libraster.Rast_get_history(self.c_hist, libraster.HIST_MAPID))
if date_str:
try:
return datetime.datetime.strptime(date_str, self.date_fmt)
except ValueError:
return date_str
def _set_date(self, datetimeobj):
if datetimeobj:
date_str = datetimeobj.strftime(self.date_fmt)
date_str = encode(date_str)
return libraster.Rast_set_history(
self.c_hist, libraster.HIST_MAPID, ctypes.c_char_p(date_str)
)
date = property(fget=_get_date, fset=_set_date, doc="Set or obtain the date of map")
# ----------------------------------------------------------------------
# libraster.HIST_MAPSET
def _get_mapset(self):
return decode(libraster.Rast_get_history(self.c_hist, libraster.HIST_MAPSET))
def _set_mapset(self, mapset):
mapset = encode(mapset)
return libraster.Rast_set_history(
self.c_hist, libraster.HIST_MAPSET, ctypes.c_char_p(mapset)
)
mapset = property(
fget=_get_mapset, fset=_set_mapset, doc="Set or obtain the mapset of map"
)
# ----------------------------------------------------------------------
# libraster.HIST_MAPTYPE
def _get_maptype(self):
return decode(libraster.Rast_get_history(self.c_hist, libraster.HIST_MAPTYPE))
def _set_maptype(self, maptype):
maptype = encode(maptype)
return libraster.Rast_set_history(
self.c_hist, libraster.HIST_MAPTYPE, ctypes.c_char_p(maptype)
)
maptype = property(
fget=_get_maptype, fset=_set_maptype, doc="Set or obtain the type of map"
)
# ----------------------------------------------------------------------
# libraster.HIST_NUM_FIELDS
#
# Never used in any raster modules
#
# def _get_num_fields(self):
# return libraster.Rast_get_history(self.c_hist,
# libraster.HIST_NUM_FIELDS)
#
# def _set_num_fields(self, num_fields):
# return libraster.Rast_set_history(self.c_hist,
# libraster.HIST_NUM_FIELDS,
# ctypes.c_char_p(num_fields))
#
# num_fields = property(fget = _get_num_fields, fset = _set_num_fields)
# ----------------------------------------------------------------------
# libraster.HIST_TITLE
def _get_title(self):
return decode(libraster.Rast_get_history(self.c_hist, libraster.HIST_TITLE))
def _set_title(self, title):
title = encode(title)
return libraster.Rast_set_history(
self.c_hist, libraster.HIST_TITLE, ctypes.c_char_p(title)
)
title = property(
fget=_get_title, fset=_set_title, doc="Set or obtain the title of map"
)
[docs] def append(self, obj):
"""Rast_append_history"""
libraster.Rast_append_history(self.c_hist, ctypes.c_char_p(str(obj)))
[docs] def append_fmt(self, fmt, *args):
"""Rast_append_format_history"""
libraster.Rast_append_format_history(self.c_hist, ctypes.c_char_p(fmt), *args)
[docs] def clear(self):
"""Clear the history"""
libraster.Rast_clear_history(self.c_hist)
[docs] def command(self):
"""Rast_command_history"""
libraster.Rast_command_history(self.c_hist)
[docs] def format(self, field, fmt, *args):
"""Rast_format_history"""
libraster.Rast_format_history(
self.c_hist, ctypes.c_int(field), ctypes.c_char_p(fmt), *args
)
[docs] def length(self):
"""Rast_history_length"""
return libraster.Rast_history_length(self.c_hist)
[docs] def line(self, line):
"""Rast_history_line"""
return libraster.Rast_history_line(self.c_hist, ctypes.c_int(line))
[docs] def read(self):
"""Read the history of map, users need to use this function to
obtain all the information of map. ::
>>> import grass.lib.gis as libgis
>>> import ctypes
>>> import grass.lib.raster as libraster
>>> hist = libraster.History()
..
"""
libraster.Rast_read_history(self.name, self.mapset, self.c_hist)
[docs] def write(self):
"""Rast_write_history"""
libraster.Rast_write_history(self.name, self.c_hist)
[docs] def short(self):
"""Rast_short_history"""
libraster.Rast_short_history(self.name, "raster", self.c_hist)
