| 1 |
# Copyright (c) 2001 by Intevation GmbH |
# Copyright (c) 2001, 2002 by Intevation GmbH |
| 2 |
# Authors: |
# Authors: |
| 3 |
# Jan-Oliver Wagner <[email protected]> |
# Jan-Oliver Wagner <[email protected]> |
| 4 |
# Bernhard Herzog <[email protected]> |
# Bernhard Herzog <[email protected]> |
| 15 |
import os |
import os |
| 16 |
import string |
import string |
| 17 |
|
|
| 18 |
from Thuban.Lib.fileutil import relative_filename |
import Thuban.Lib.fileutil |
| 19 |
|
|
| 20 |
|
from Thuban.Model.color import Color |
| 21 |
|
|
| 22 |
|
# |
| 23 |
|
# one level of indention |
| 24 |
|
# |
| 25 |
|
TAB = " " |
| 26 |
|
|
| 27 |
|
def relative_filename(dir, filename): |
| 28 |
|
"""Return a filename relative to dir for the absolute file name absname. |
| 29 |
|
|
| 30 |
|
This is almost the same as the function in fileutil, except that dir |
| 31 |
|
can be an empty string in which case filename will be returned |
| 32 |
|
unchanged. |
| 33 |
|
""" |
| 34 |
|
if dir: |
| 35 |
|
return Thuban.Lib.fileutil.relative_filename(dir, filename) |
| 36 |
|
else: |
| 37 |
|
return filename |
| 38 |
|
|
| 39 |
def escape(data): |
def escape(data): |
| 40 |
"""Escape &, \", ', <, and > in a string of data. |
"""Escape &, \", ', <, and > in a string of data. |
| 46 |
data = string.replace(data, "'", "'") |
data = string.replace(data, "'", "'") |
| 47 |
return data |
return data |
| 48 |
|
|
| 49 |
def save_session(session, filename): |
class Saver: |
|
"""Save the session session to the file given by filename""" |
|
|
dir = os.path.dirname(filename) |
|
|
file = open(filename, 'w') |
|
|
write = file.write |
|
|
write('<?xml version="1.0" encoding="UTF-8"?>\n') |
|
|
write('<!DOCTYPE session SYSTEM "thuban.dtd">\n') |
|
|
write('<session title="%s">\n' % escape(session.title)) |
|
|
for map in session.Maps(): |
|
|
write('\t<map title="%s">\n' % escape(map.title)) |
|
|
if map.projection and len(map.projection.params) > 0: |
|
|
write('\t\t<projection>\n') |
|
|
for param in map.projection.params: |
|
|
write('\t\t\t<parameter value="%s"/>\n' % escape(param)) |
|
|
write('\t\t</projection>\n') |
|
| 50 |
|
|
| 51 |
for layer in map.Layers(): |
"""Class to serialize a session into an XML file. |
| 52 |
fill = layer.fill |
|
| 53 |
if fill is None: |
Applications built on top of Thuban may derive from this class and |
| 54 |
fill = "None" |
override or extend the methods to save additinal information. This |
| 55 |
else: |
additional information should take the form of additional attributes |
| 56 |
fill = fill.hex() |
or elements whose names are prefixed with a namespace. To define a |
| 57 |
stroke = layer.stroke |
namespace derived classes should extend the write_session method to |
| 58 |
if stroke is None: |
pass the namespaces to the default implementation. |
| 59 |
stroke = "None" |
""" |
| 60 |
|
|
| 61 |
|
|
| 62 |
|
def __init__(self, session): |
| 63 |
|
self.session = session |
| 64 |
|
|
| 65 |
|
def write(self, file_or_filename): |
| 66 |
|
"""Write the session to a file. |
| 67 |
|
|
| 68 |
|
The argument may be either a file object or a filename. If it's |
| 69 |
|
a filename, the file will be opened for writing. Files of |
| 70 |
|
shapefiles will be stored as filenames relative to the directory |
| 71 |
|
the file is stored in (as given by os.path.dirname(filename)) if |
| 72 |
|
they have a common parent directory other than the root |
| 73 |
|
directory. |
| 74 |
|
|
| 75 |
|
If the argument is a file object (which is determined by the |
| 76 |
|
presence of a write method) all filenames will be absolut |
| 77 |
|
filenames. |
| 78 |
|
""" |
| 79 |
|
|
| 80 |
|
self.indent_level = 0 |
| 81 |
|
|
| 82 |
|
if hasattr(file_or_filename, "write"): |
| 83 |
|
# it's a file object |
| 84 |
|
self.file = file_or_filename |
| 85 |
|
self.dir = "" |
| 86 |
|
else: |
| 87 |
|
filename = file_or_filename |
| 88 |
|
self.dir = os.path.dirname(filename) |
| 89 |
|
self.file = open(filename, 'w') |
| 90 |
|
self.write_header() |
| 91 |
|
self.write_session(self.session) |
| 92 |
|
|
| 93 |
|
if self.indent_level != 0: |
| 94 |
|
raise ValueError("indent_level still positive!") |
| 95 |
|
|
| 96 |
|
def write_attribs(self, attrs): |
| 97 |
|
for name, value in attrs.items(): |
| 98 |
|
if isinstance(value, Color): |
| 99 |
|
value = value.hex() |
| 100 |
else: |
else: |
| 101 |
stroke = stroke.hex() |
value = str(value) |
| 102 |
write(('\t\t<layer title="%s" filename="%s"' |
self.file.write(' %s="%s"' % (escape(name), escape(value))) |
| 103 |
' fill="%s" stroke="%s"/>\n') % |
|
| 104 |
(escape(layer.title), |
def open_element(self, element, attrs = {}): |
| 105 |
escape(relative_filename(dir, layer.filename)), |
# Helper function to write an element open tag with attributes |
| 106 |
fill, stroke)) |
self.file.write("%s<%s" % (TAB*self.indent_level, element)) |
| 107 |
labels = map.LabelLayer().Labels() |
self.write_attribs(attrs) |
| 108 |
|
self.file.write(">\n") |
| 109 |
|
|
| 110 |
|
self.indent_level += 1 |
| 111 |
|
|
| 112 |
|
def close_element(self, element): |
| 113 |
|
self.indent_level -= 1 |
| 114 |
|
if self.indent_level < 0: |
| 115 |
|
raise ValueError("close_element called too many times!") |
| 116 |
|
self.file.write("%s</%s>\n" % (TAB*self.indent_level, element)) |
| 117 |
|
|
| 118 |
|
def write_element(self, element, attrs = {}): |
| 119 |
|
# Helper function to write an element open tag with attributes |
| 120 |
|
self.file.write("%s<%s" % (TAB*self.indent_level, element)) |
| 121 |
|
self.write_attribs(attrs) |
| 122 |
|
self.file.write("/>\n") |
| 123 |
|
|
| 124 |
|
def write_header(self): |
| 125 |
|
"""Write the XML header""" |
| 126 |
|
self.file.write('<?xml version="1.0" encoding="UTF-8"?>\n') |
| 127 |
|
self.file.write('<!DOCTYPE session SYSTEM "thuban.dtd">\n') |
| 128 |
|
|
| 129 |
|
def write_session(self, session, attrs = None, namespaces = ()): |
| 130 |
|
"""Write the session and its contents |
| 131 |
|
|
| 132 |
|
By default, write a session element with the title attribute and |
| 133 |
|
call write_map for each map contained in the session. |
| 134 |
|
|
| 135 |
|
The optional argument attrs is for additional attributes and, if |
| 136 |
|
given, should be a mapping from attribute names to attribute |
| 137 |
|
values. The values should not be XML-escaped yet. |
| 138 |
|
|
| 139 |
|
The optional argument namespaces, if given, should be a sequence |
| 140 |
|
of (name, URI) pairs. The namespaces are written as namespace |
| 141 |
|
attributes into the session element. This is mainly useful for |
| 142 |
|
derived classes that need to store additional information in a |
| 143 |
|
thuban session file. |
| 144 |
|
""" |
| 145 |
|
if attrs is None: |
| 146 |
|
attrs = {} |
| 147 |
|
attrs["title"] = session.title |
| 148 |
|
for name, uri in namespaces: |
| 149 |
|
attrs["xmlns:" + name] = uri |
| 150 |
|
self.open_element("session", attrs) |
| 151 |
|
for map in session.Maps(): |
| 152 |
|
self.write_map(map) |
| 153 |
|
self.close_element("session") |
| 154 |
|
|
| 155 |
|
def write_map(self, map): |
| 156 |
|
"""Write the map and its contents. |
| 157 |
|
|
| 158 |
|
By default, write a map element element with the title |
| 159 |
|
attribute, call write_projection to write the projection |
| 160 |
|
element, call write_layer for each layer contained in the map |
| 161 |
|
and finally call write_label_layer to write the label layer. |
| 162 |
|
""" |
| 163 |
|
write = self.file.write |
| 164 |
|
self.open_element('map title="%s"' % escape(map.title)) |
| 165 |
|
self.write_projection(map.projection) |
| 166 |
|
for layer in map.Layers(): |
| 167 |
|
self.write_layer(layer) |
| 168 |
|
self.write_label_layer(map.LabelLayer()) |
| 169 |
|
self.close_element('map') |
| 170 |
|
|
| 171 |
|
def write_projection(self, projection): |
| 172 |
|
"""Write the projection. |
| 173 |
|
""" |
| 174 |
|
if projection and len(projection.params) > 0: |
| 175 |
|
self.open_element("projection") |
| 176 |
|
for param in projection.params: |
| 177 |
|
self.write_element('parameter value="%s"' % escape(param)) |
| 178 |
|
self.close_element("projection") |
| 179 |
|
|
| 180 |
|
def write_layer(self, layer, attrs = None): |
| 181 |
|
"""Write the layer. |
| 182 |
|
|
| 183 |
|
The optional argument attrs is for additional attributes and, if |
| 184 |
|
given, should be a mapping from attribute names to attribute |
| 185 |
|
values. The values should not be XML-escaped yet. |
| 186 |
|
""" |
| 187 |
|
if attrs is None: |
| 188 |
|
attrs = {} |
| 189 |
|
attrs["title"] = layer.title |
| 190 |
|
attrs["filename"] = relative_filename(self.dir, layer.filename) |
| 191 |
|
attrs["stroke_width"] = str(layer.stroke_width) |
| 192 |
|
fill = layer.fill |
| 193 |
|
if fill is None: |
| 194 |
|
attrs["fill"] = "None" |
| 195 |
|
else: |
| 196 |
|
attrs["fill"] = fill.hex() |
| 197 |
|
stroke = layer.stroke |
| 198 |
|
if stroke is None: |
| 199 |
|
attrs["stroke"] = "None" |
| 200 |
|
else: |
| 201 |
|
attrs["stroke"] = stroke.hex() |
| 202 |
|
|
| 203 |
|
self.open_element("layer", attrs) |
| 204 |
|
self.write_classification(layer) |
| 205 |
|
self.close_element("layer") |
| 206 |
|
|
| 207 |
|
def write_classification(self, layer, attrs = None): |
| 208 |
|
if attrs is None: |
| 209 |
|
attrs = {} |
| 210 |
|
|
| 211 |
|
lc = layer.classification |
| 212 |
|
|
| 213 |
|
field = lc.field |
| 214 |
|
|
| 215 |
|
# |
| 216 |
|
# there isn't a classification of anything |
| 217 |
|
# so don't do anything |
| 218 |
|
# |
| 219 |
|
if field is None: return |
| 220 |
|
|
| 221 |
|
attrs["field"] = field |
| 222 |
|
self.open_element("classification", attrs) |
| 223 |
|
|
| 224 |
|
if lc.NullData is not None: |
| 225 |
|
self.open_element("clnull") |
| 226 |
|
self.write_element("cldata", lc.NullData) |
| 227 |
|
self.close_element("clnull") |
| 228 |
|
|
| 229 |
|
if lc.points != {}: |
| 230 |
|
for value, data in lc.points.items(): |
| 231 |
|
self.open_element('clpoint value="%s"' % (escape(str(value)))) |
| 232 |
|
self.write_element("cldata", data) |
| 233 |
|
self.close_element('clpoint') |
| 234 |
|
|
| 235 |
|
if lc.ranges != []: |
| 236 |
|
for p in lc.ranges: |
| 237 |
|
self.open_element('clrange min="%s" max="%s"' |
| 238 |
|
% (escape(str(p[0])), escape(str(p[1])))) |
| 239 |
|
self.write_element("cldata", p[2]) |
| 240 |
|
self.close_element('clrange') |
| 241 |
|
|
| 242 |
|
self.close_element("classification") |
| 243 |
|
|
| 244 |
|
def write_label_layer(self, layer): |
| 245 |
|
"""Write the label layer. |
| 246 |
|
""" |
| 247 |
|
labels = layer.Labels() |
| 248 |
if labels: |
if labels: |
| 249 |
write('\t\t<labellayer>\n') |
self.open_element('labellayer') |
| 250 |
for label in labels: |
for label in labels: |
| 251 |
write(('\t\t\t<label x="%g" y="%g" text="%s"' |
self.write_element(('label x="%g" y="%g" text="%s"' |
| 252 |
' halign="%s" valign="%s"/>\n') |
' halign="%s" valign="%s"') |
| 253 |
% (label.x, label.y, label.text, label.halign, |
% (label.x, label.y, label.text, label.halign, |
| 254 |
label.valign)) |
label.valign)) |
| 255 |
write('\t\t</labellayer>\n') |
self.close_element('labellayer') |
| 256 |
write('\t</map>\n') |
|
| 257 |
write('</session>\n') |
|
| 258 |
|
|
| 259 |
|
def save_session(session, file, saver_class = None): |
| 260 |
|
"""Save the session session to a file. |
| 261 |
|
|
| 262 |
|
The file argument may either be a filename or an open file object. |
| 263 |
|
|
| 264 |
|
The optional argument saver_class is the class to use to serialize |
| 265 |
|
the session. By default or if it's None, the saver class will be |
| 266 |
|
Saver. |
| 267 |
|
|
| 268 |
|
If writing the session is successful call the session's |
| 269 |
|
UnsetModified method |
| 270 |
|
""" |
| 271 |
|
if saver_class is None: |
| 272 |
|
saver_class = Saver |
| 273 |
|
saver = saver_class(session) |
| 274 |
|
saver.write(file) |
| 275 |
|
|
| 276 |
# after a successful save consider the session unmodified. |
# after a successful save consider the session unmodified. |
| 277 |
session.UnsetModified() |
session.UnsetModified() |
Parent Directory
| 
Revision Log
| 
Patch