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Merge pull request #176 from FlyingSamson/read-svg-from-file-like-obj 

Support reading of SVGs from strings and file-like objects
support-stringio-objects
Andrew Port 2022-06-05 20:12:19 -07:00 committed by GitHub
parent 19df25b99b 07f46d41f8
commit a989c9831d
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 140 additions and 10 deletions
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2
svgpathtools/__init__.py
View File

@ -17,6 +17,6 @@ from .document import (Document, CONVERSIONS, CONVERT_ONLY_PATHS,
from .svg_io_sax import SaxDocument
try:
from .svg_to_paths import svg2paths, svg2paths2
from .svg_to_paths import svg2paths, svg2paths2, svgstr2paths
except ImportError:
pass

27
svgpathtools/document.py
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@ -41,6 +41,7 @@ import xml.etree.ElementTree as etree
from xml.etree.ElementTree import Element, SubElement, register_namespace
from xml.dom.minidom import parseString
import warnings
from io import StringIO
from tempfile import gettempdir
from time import time
@ -235,13 +236,19 @@ class Document:
The output Path objects will be transformed based on their parent groups.
Args:
filepath (str): The filepath of the DOM-style object.
filepath (str or file-like): The filepath of the
DOM-style object or a file-like object containing it.
"""
self.original_filepath = None
# remember location of original svg file
self.original_filepath = filepath
if filepath is not None and os.path.dirname(filepath) == '':
self.original_filepath = os.path.join(os.getcwd(), filepath)
# strings are interpreted as file location everything else is treated as
# file-like object and passed to the xml parser directly
if isinstance(filepath, str):
# remember location of original svg file if any
self.original_filepath = filepath
if os.path.dirname(filepath) == '':
self.original_filepath = os.path.join(
os.getcwd(), filepath)
if filepath is None:
self.tree = etree.ElementTree(Element('svg'))
@ -251,6 +258,16 @@ class Document:
self.root = self.tree.getroot()
@classmethod
def from_svg_string(cls, svg_string):
"""Factory method for creating a document from a string holding a svg
object
"""
# wrap string into StringIO object
svg_file_obj = StringIO(svg_string)
# create document from file object
return Document(svg_file_obj)
def paths(self, group_filter=lambda x: True,
path_filter=lambda x: True, path_conversions=CONVERSIONS):
"""Returns a list of all paths in the document.

36
svgpathtools/svg_to_paths.py
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@ -5,6 +5,7 @@ The main tool being the svg2paths() function."""
from __future__ import division, absolute_import, print_function
from xml.dom.minidom import parse
from os import path as os_path, getcwd
from io import StringIO
import re
# Internal dependencies
@ -144,7 +145,9 @@ def svg2paths(svg_file_location,
SVG Path, Line, Polyline, Polygon, Circle, and Ellipse elements.
Args:
svg_file_location (string): the location of the svg file
svg_file_location (string or file-like object): the location of the
svg file on disk or a file-like object containing the content of a
svg file
return_svg_attributes (bool): Set to True and a dictionary of
svg-attributes will be extracted and returned. See also the
`svg2paths2()` function.
@ -168,8 +171,12 @@ def svg2paths(svg_file_location,
list: The list of corresponding path attribute dictionaries.
dict (optional): A dictionary of svg-attributes (see `svg2paths2()`).
"""
if os_path.dirname(svg_file_location) == '':
svg_file_location = os_path.join(getcwd(), svg_file_location)
# strings are interpreted as file location everything else is treated as
# file-like object and passed to the xml parser directly
if isinstance(svg_file_location, str):
if os_path.dirname(svg_file_location) == '':
svg_file_location = os_path.join(
getcwd(), svg_file_location)
doc = parse(svg_file_location)
@ -249,3 +256,26 @@ def svg2paths2(svg_file_location,
convert_polylines_to_paths=convert_polylines_to_paths,
convert_polygons_to_paths=convert_polygons_to_paths,
convert_rectangles_to_paths=convert_rectangles_to_paths)
def svgstr2paths(svg_string,
return_svg_attributes=False,
convert_circles_to_paths=True,
convert_ellipses_to_paths=True,
convert_lines_to_paths=True,
convert_polylines_to_paths=True,
convert_polygons_to_paths=True,
convert_rectangles_to_paths=True):
"""Convenience function; identical to svg2paths() except that it takes the
svg object as string. See svg2paths() docstring for more
info."""
# wrap string into StringIO object
svg_file_obj = StringIO(svg_string)
return svg2paths(svg_file_location=svg_file_obj,
return_svg_attributes=return_svg_attributes,
convert_circles_to_paths=convert_circles_to_paths,
convert_ellipses_to_paths=convert_ellipses_to_paths,
convert_lines_to_paths=convert_lines_to_paths,
convert_polylines_to_paths=convert_polylines_to_paths,
convert_polygons_to_paths=convert_polygons_to_paths,
convert_rectangles_to_paths=convert_rectangles_to_paths)

44
test/test_document.py Normal file
View File

@ -0,0 +1,44 @@
from __future__ import division, absolute_import, print_function
import unittest
from svgpathtools import *
from io import StringIO
from io import open # overrides build-in open for compatibility with python2
from os.path import join, dirname
class TestDocument(unittest.TestCase):
def test_from_file_path(self):
""" Test reading svg from file provided as path """
doc = Document(join(dirname(__file__), 'polygons.svg'))
self.assertEqual(len(doc.paths()), 2)
def test_from_file_object(self):
""" Test reading svg from file object that has already been opened """
with open(join(dirname(__file__), 'polygons.svg'), 'r') as file:
doc = Document(file)
self.assertEqual(len(doc.paths()), 2)
def test_from_stringio(self):
""" Test reading svg object contained in a StringIO object """
with open(join(dirname(__file__), 'polygons.svg'),
'r', encoding='utf-8') as file:
# read entire file into string
file_content = file.read()
# prepare stringio object
file_as_stringio = StringIO(file_content)
doc = Document(file_as_stringio)
self.assertEqual(len(doc.paths()), 2)
def test_from_string(self):
""" Test reading svg object contained in a string"""
with open(join(dirname(__file__), 'polygons.svg'),
'r', encoding='utf-8') as file:
# read entire file into string
file_content = file.read()
doc = Document.from_svg_string(file_content)
self.assertEqual(len(doc.paths()), 2)

41
test/test_svg2paths.py
View File

@ -1,6 +1,8 @@
from __future__ import division, absolute_import, print_function
import unittest
from svgpathtools import *
from io import StringIO
from io import open # overrides build-in open for compatibility with python2
from os.path import join, dirname
from svgpathtools.svg_to_paths import rect2pathd
@ -57,4 +59,41 @@ class TestSVG2Paths(unittest.TestCase):
non_rounded = {"x":"10", "y":"10", "width":"100","height":"100"}
self.assertEqual(rect2pathd(non_rounded), 'M10.0 10.0 L 110.0 10.0 L 110.0 110.0 L 10.0 110.0 z')
rounded = {"x":"10", "y":"10", "width":"100","height":"100", "rx":"15", "ry": "12"}
self.assertEqual(rect2pathd(rounded), "M 25.0 10.0 L 95.0 10.0 A 15.0 12.0 0 0 1 110.0 22.0 L 110.0 98.0 A 15.0 12.0 0 0 1 95.0 110.0 L 25.0 110.0 A 15.0 12.0 0 0 1 10.0 98.0 L 10.0 22.0 A 15.0 12.0 0 0 1 25.0 10.0 z")
self.assertEqual(rect2pathd(rounded), "M 25.0 10.0 L 95.0 10.0 A 15.0 12.0 0 0 1 110.0 22.0 L 110.0 98.0 A 15.0 12.0 0 0 1 95.0 110.0 L 25.0 110.0 A 15.0 12.0 0 0 1 10.0 98.0 L 10.0 22.0 A 15.0 12.0 0 0 1 25.0 10.0 z")
def test_from_file_path(self):
""" Test reading svg from file provided as path """
paths, _ = svg2paths(join(dirname(__file__), 'polygons.svg'))
self.assertEqual(len(paths), 2)
def test_from_file_object(self):
""" Test reading svg from file object that has already been opened """
with open(join(dirname(__file__), 'polygons.svg'), 'r') as file:
paths, _ = svg2paths(file)
self.assertEqual(len(paths), 2)
def test_from_stringio(self):
""" Test reading svg object contained in a StringIO object """
with open(join(dirname(__file__), 'polygons.svg'),
'r', encoding='utf-8') as file:
# read entire file into string
file_content = file.read()
# prepare stringio object
file_as_stringio = StringIO(file_content)
paths, _ = svg2paths(file_as_stringio)
self.assertEqual(len(paths), 2)
def test_from_string(self):
""" Test reading svg object contained in a string """
with open(join(dirname(__file__), 'polygons.svg'),
'r', encoding='utf-8') as file:
# read entire file into string
file_content = file.read()
paths, _ = svgstr2paths(file_content)
self.assertEqual(len(paths), 2)