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gramps/src/plugins/lib/libmetadata.py
Paul Franklin c83653f017 for Python files and Makefile.am files in the "src" (only) sub-tree: 
1) add SVN svn:keywords "Id" property if it didn't have it
2) add SVN svn:mime-type "text/plain" property if it didn't have it
3) add SVN "Id" line to the file if it had none


svn: r18554
2011-12-06 16:56:50 +00:00

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Python
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2011 Nick Hall
# Copyright (C) 2011 Rob G. Healey <robhealey1@gmail.com>
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# $Id$
#
from ListModel import ListModel
from gen.ggettext import gettext as _
from PlaceUtils import conv_lat_lon
from fractions import Fraction
import gen.lib
import DateHandler
import datetime
import gtk
import pyexiv2
# v0.1 has a different API to v0.2 and above
if hasattr(pyexiv2, 'version_info'):
OLD_API = False
else:
# version_info attribute does not exist prior to v0.2.0
OLD_API = True
def format_datetime(exif_dt):
"""
Convert a python datetime object into a string for display, using the
standard Gramps date format.
"""
if type(exif_dt) != datetime.datetime:
return _('Invalid format')
date_part = gen.lib.Date()
date_part.set_yr_mon_day(exif_dt.year, exif_dt.month, exif_dt.day)
date_str = DateHandler.displayer.display(date_part)
time_str = _('%(hr)02d:%(min)02d:%(sec)02d') % {'hr': exif_dt.hour,
'min': exif_dt.minute,
'sec': exif_dt.second}
return _('%(date)s %(time)s') % {'date': date_str, 'time': time_str}
def format_gps(dms_list, nsew_ref):
"""
Convert a [degrees, minutes, seconds] list of Fractions and a direction
reference into a string for display.
"""
try:
degs, mins, secs = dms_list
except (TypeError, ValueError):
return _('Invalid format')
if not isinstance(degs, Fraction):
# Old API uses pyexiv2.Rational
degs = Fraction(str(degs))
mins = Fraction(str(mins))
secs = Fraction(str(secs))
value = float(degs) + float(mins) / 60 + float(secs) / 3600
if nsew_ref == 'N':
result = conv_lat_lon(str(value), '0', 'DEG')[0]
elif nsew_ref == 'S':
result = conv_lat_lon('-' + str(value), '0', 'DEG')[0]
elif nsew_ref == 'E':
result = conv_lat_lon('0', str(value), 'DEG')[1]
elif nsew_ref == 'W':
result = conv_lat_lon('0', '-' + str(value), 'DEG')[1]
else:
result = None
return result if result is not None else _('Invalid format')
DESCRIPTION = _('Description')
IMAGE = _('Image')
CAMERA = _('Camera')
GPS = _('GPS')
ADVANCED = _('Advanced')
TAGS = [(DESCRIPTION, 'Exif.Image.ImageDescription', None, None),
(DESCRIPTION, 'Exif.Image.Artist', None, None),
(DESCRIPTION, 'Exif.Image.Copyright', None, None),
(DESCRIPTION, 'Exif.Photo.DateTimeOriginal', None, format_datetime),
(DESCRIPTION, 'Exif.Photo.DateTimeDigitized', None, format_datetime),
(DESCRIPTION, 'Exif.Image.DateTime', None, format_datetime),
(DESCRIPTION, 'Exif.Image.TimeZoneOffset', None, None),
(DESCRIPTION, 'Exif.Image.XPSubject', None, None),
(DESCRIPTION, 'Exif.Image.XPComment', None, None),
(DESCRIPTION, 'Exif.Image.XPKeywords', None, None),
(DESCRIPTION, 'Exif.Image.Rating', None, None),
(IMAGE, 'Exif.Image.DocumentName', None, None),
(IMAGE, 'Exif.Photo.PixelXDimension', None, None),
(IMAGE, 'Exif.Photo.PixelYDimension', None, None),
(IMAGE, 'Exif.Image.XResolution', 'Exif.Image.ResolutionUnit', None),
(IMAGE, 'Exif.Image.YResolution', 'Exif.Image.ResolutionUnit', None),
(IMAGE, 'Exif.Image.Orientation', None, None),
(IMAGE, 'Exif.Photo.ColorSpace', None, None),
(IMAGE, 'Exif.Image.YCbCrPositioning', None, None),
(IMAGE, 'Exif.Photo.ComponentsConfiguration', None, None),
(IMAGE, 'Exif.Image.Compression', None, None),
(IMAGE, 'Exif.Photo.CompressedBitsPerPixel', None, None),
(IMAGE, 'Exif.Image.PhotometricInterpretation', None, None),
(CAMERA, 'Exif.Image.Make', None, None),
(CAMERA, 'Exif.Image.Model', None, None),
(CAMERA, 'Exif.Photo.FNumber', None, None),
(CAMERA, 'Exif.Photo.ExposureTime', None, None),
(CAMERA, 'Exif.Photo.ISOSpeedRatings', None, None),
(CAMERA, 'Exif.Photo.FocalLength', None, None),
(CAMERA, 'Exif.Photo.FocalLengthIn35mmFilm', None, None),
(CAMERA, 'Exif.Photo.MaxApertureValue', None, None),
(CAMERA, 'Exif.Photo.MeteringMode', None, None),
(CAMERA, 'Exif.Photo.ExposureProgram', None, None),
(CAMERA, 'Exif.Photo.ExposureBiasValue', None, None),
(CAMERA, 'Exif.Photo.Flash', None, None),
(CAMERA, 'Exif.Image.FlashEnergy', None, None),
(CAMERA, 'Exif.Image.SelfTimerMode', None, None),
(CAMERA, 'Exif.Image.SubjectDistance', None, None),
(CAMERA, 'Exif.Photo.Contrast', None, None),
(CAMERA, 'Exif.Photo.LightSource', None, None),
(CAMERA, 'Exif.Photo.Saturation', None, None),
(CAMERA, 'Exif.Photo.Sharpness', None, None),
(CAMERA, 'Exif.Photo.WhiteBalance', None, None),
(CAMERA, 'Exif.Photo.DigitalZoomRatio', None, None),
(GPS, 'Exif.GPSInfo.GPSLatitude',
'Exif.GPSInfo.GPSLatitudeRef', format_gps),
(GPS, 'Exif.GPSInfo.GPSLongitude',
'Exif.GPSInfo.GPSLongitudeRef', format_gps),
(GPS, 'Exif.GPSInfo.GPSAltitude',
'Exif.GPSInfo.GPSAltitudeRef', None),
(GPS, 'Exif.GPSInfo.GPSTimeStamp', None, None),
(GPS, 'Exif.GPSInfo.GPSSatellites', None, None),
(ADVANCED, 'Exif.Image.Software', None, None),
(ADVANCED, 'Exif.Photo.ImageUniqueID', None, None),
(ADVANCED, 'Exif.Image.CameraSerialNumber', None, None),
(ADVANCED, 'Exif.Photo.ExifVersion', None, None),
(ADVANCED, 'Exif.Photo.FlashpixVersion', None, None),
(ADVANCED, 'Exif.Image.ExifTag', None, None),
(ADVANCED, 'Exif.Image.GPSTag', None, None),
(ADVANCED, 'Exif.Image.BatteryLevel', None, None)]
class MetadataView(gtk.TreeView):
def __init__(self):
gtk.TreeView.__init__(self)
self.sections = {}
titles = [(_('Key'), 1, 235),
(_('Value'), 2, 325)]
self.model = ListModel(self, titles, list_mode="tree")
def display_exif_tags(self, full_path):
"""
Display the exif tags.
"""
# pylint: disable=E1101
self.sections = {}
self.model.clear()
if OLD_API: # prior to v0.2.0
try:
metadata = pyexiv2.Image(full_path)
except IOError:
return False
metadata.readMetadata()
for section, key, key2, func in TAGS:
if key not in metadata.exifKeys():
continue
if func is not None:
if key2 is None:
human_value = func(metadata[key])
else:
if key2 in metadata.exifKeys():
human_value = func(metadata[key], metadata[key2])
else:
human_value = func(metadata[key], None)
else:
human_value = metadata.interpretedExifValue(key)
if key2 is not None and key2 in metadata.exifKeys():
human_value += ' ' + metadata.interpretedExifValue(key2)
label = metadata.tagDetails(key)[0]
node = self.__add_section(section)
self.model.add((label, human_value), node=node)
else: # v0.2.0 and above
metadata = pyexiv2.ImageMetadata(full_path)
try:
metadata.read()
except IOError:
return False
for section, key, key2, func in TAGS:
if key not in metadata.exif_keys:
continue
tag = metadata.get(key)
if key2 is not None and key2 in metadata.exif_keys:
tag2 = metadata.get(key2)
else:
tag2 = None
if func is not None:
if key2 is None:
human_value = func(tag.value)
else:
if tag2 is None:
human_value = func(tag.value, None)
else:
human_value = func(tag.value, tag2.value)
else:
human_value = tag.human_value
if tag2 is not None:
human_value += ' ' + tag2.human_value
label = tag.label
node = self.__add_section(section)
self.model.add((tag.label, human_value), node=node)
self.model.tree.expand_all()
return self.model.count > 0
def __add_section(self, section):
"""
Add the section heading node to the model.
"""
if section not in self.sections:
node = self.model.add([section, ''])
self.sections[section] = node
else:
node = self.sections[section]
return node
def get_has_data(self, full_path):
"""
Return True if the gramplet has data, else return False.
"""
# pylint: disable=E1101
if OLD_API: # prior to v0.2.0
try:
metadata = pyexiv2.Image(full_path)
except IOError:
return False
metadata.readMetadata()
for tag in TAGS:
if tag[1] in metadata.exifKeys():
return True
else: # v0.2.0 and above
metadata = pyexiv2.ImageMetadata(full_path)
try:
metadata.read()
except IOError:
return False
for tag in TAGS:
if tag[1] in metadata.exif_keys:
return True
return False
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