update test mpl version

.pre-commit-config.yaml

@@ -5,7 +5,7 @@ repos:
       - id: isort
 
   - repo: https://github.com/psf/black
-    rev: 21.12b0
+    rev: 22.1.0
     hooks:
       - id: black
         language_version: python3

justfile

@@ -1,21 +1,12 @@
-version := `python3 -c "from configparser import ConfigParser; p = ConfigParser(); p.read('setup.cfg'); print(p['metadata']['version'])"`
-name := `python3 -c "from configparser import ConfigParser; p = ConfigParser(); p.read('setup.cfg'); print(p['metadata']['name'])"`
-
+version := `python3 -c "from src.tikzplotlib.__about__ import __version__; print(__version__)"`
 
 default:
 	@echo "\"just publish\"?"
 
-tag:
-	@if [ "$(git rev-parse --abbrev-ref HEAD)" != "main" ]; then exit 1; fi
-	curl -H "Authorization: token `cat ~/.github-access-token`" -d '{"tag_name": "v{{version}}"}' https://api.github.com/repos/nschloe/{{name}}/releases
-
-upload: clean
+publish:
 	@if [ "$(git rev-parse --abbrev-ref HEAD)" != "main" ]; then exit 1; fi
-	# https://stackoverflow.com/a/58756491/353337
-	python3 -m build --sdist --wheel .
-	twine upload dist/*
-
-publish: tag upload
+	gh release create "v{{version}}"
+	flit publish
 
 clean:
 	@find . | grep -E "(__pycache__|\.pyc|\.pyo$)" | xargs rm -rf

pyproject.toml

@@ -1,6 +1,41 @@
 [build-system]
-requires = ["setuptools>=42", "wheel"]
-build-backend = "setuptools.build_meta"
+requires = ["flit_core >=3.2,<4"]
+build-backend = "flit_core.buildapi"
 
 [tool.isort]
 profile = "black"
+
+[project]
+name = "tikzplotlib"
+authors = [{name = "Nico Schlömer", email = "nico.schloemer@gmail.com"}]
+description = "Convert matplotlib figures into TikZ/PGFPlots"
+readme = "README.md"
+license = {file = "LICENSE"}
+classifiers = [
+  "Development Status :: 5 - Production/Stable",
+  "Framework :: Matplotlib",
+  "License :: OSI Approved :: MIT License",
+  "Operating System :: OS Independent",
+  "Programming Language :: Python",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.7",
+  "Programming Language :: Python :: 3.8",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+  "Topic :: Multimedia :: Graphics :: Graphics Conversion",
+  "Topic :: Scientific/Engineering :: Visualization",
+]
+keywords = ["latex", "tikz", "matplotlib", "graphics"]
+dynamic = ["version"]
+requires-python = ">=3.7"
+dependencies = [
+  "matplotlib >= 1.4.0",
+  "numpy",
+  "Pillow",
+  "webcolors",
+]
+
+[project.urls]
+Code = "https://github.com/nschloe/tikzplotlib"
+Issues = "https://github.com/nschloe/tikzplotlib/issues"
+Funding = "https://github.com/sponsors/nschloe"

src/tikzplotlib/__about__.py

@@ -1,10 +1 @@
-try:
-    # Python 3.8
-    from importlib import metadata
-except ImportError:
-    import importlib_metadata as metadata
-
-try:
-    __version__ = metadata.version("tikzplotlib")
-except Exception:
-    __version__ = "unknown"
+__version__ = "0.10.0"

src/tikzplotlib/_axes.py

@@ -630,13 +630,19 @@ def _get_ticks(data, xy, ticks, ticklabels):
 
 def _is_colorbar_heuristic(obj):
     """Find out if the object is in fact a color bar."""
-    # TODO come up with something more accurate here
+    # Not sure if these properties are always present
+    if hasattr(obj, "_colorbar") or hasattr(obj, "_colorbar_info"):
+        return True
+
+    # TODO come up with something more accurate here. See
+    # <https://discourse.matplotlib.org/t/find-out-if-an-axes-object-is-a-colorbar/22563>
     # Might help:
     # TODO Are the colorbars exactly the l.collections.PolyCollection's?
+
     try:
         aspect = float(obj.get_aspect())
     except ValueError:
-        # e.g., aspect == 'equal'
+        # e.g., aspect in ['equal', 'auto']
         return False
 
     # Assume that something is a colorbar if and only if the ratio is above 5.0
@@ -646,10 +652,10 @@ def _is_colorbar_heuristic(obj):
     #
     #    plt.colorbar(im, aspect=5)
     #
-    limit_ratio = 5.0
+    threshold_ratio = 5.0
 
-    return (aspect >= limit_ratio and len(obj.get_xticks()) == 0) or (
-        aspect <= 1.0 / limit_ratio and len(obj.get_yticks()) == 0
+    return (aspect >= threshold_ratio and len(obj.get_xticks()) == 0) or (
+        aspect <= 1.0 / threshold_ratio and len(obj.get_yticks()) == 0
     )
 
 

src/tikzplotlib/_color.py

@@ -1,5 +1,48 @@
 import matplotlib as mpl
 import numpy as np
+import webcolors
+
+# RGB values (as taken from xcolor.dtx):
+builtin_colors = {
+    "white": [1, 1, 1],
+    "lightgray": [0.75, 0.75, 0.75],
+    "gray": [0.5, 0.5, 0.5],
+    "darkgray": [0.25, 0.25, 0.25],
+    "black": [0, 0, 0],
+    #
+    "red": [1, 0, 0],
+    "green": [0, 1, 0],
+    "blue": [0, 0, 1],
+    "brown": [0.75, 0.5, 0.25],
+    "lime": [0.75, 1, 0],
+    "orange": [1, 0.5, 0],
+    "pink": [1, 0.75, 0.75],
+    "purple": [0.75, 0, 0.25],
+    "teal": [0, 0.5, 0.5],
+    "violet": [0.5, 0, 0.5],
+    # The colors cyan, magenta, yellow, and olive are also
+    # predefined by xcolor, but their RGB approximation of the
+    # native CMYK values is not very good. Don't use them here.
+}
+
+
+def _get_closest_colour_name(rgb):
+    match = None
+    mindiff = 1.0e15
+    for h, name in webcolors.CSS3_HEX_TO_NAMES.items():
+        r = int(h[1:3], 16)
+        g = int(h[3:5], 16)
+        b = int(h[5:7], 16)
+
+        diff = (rgb[0] - r) ** 2 + (rgb[1] - g) ** 2 + (rgb[2] - b) ** 2
+        if diff < mindiff:
+            match = name
+            mindiff = diff
+
+        if mindiff == 0:
+            break
+
+    return match, mindiff
 
 
 def mpl_color2xcolor(data, matplotlib_color):
@@ -12,66 +55,30 @@ def mpl_color2xcolor(data, matplotlib_color):
     if my_col[-1] == 0.0:
         return data, "none", my_col
 
-    xcol = None
-    # RGB values (as taken from xcolor.dtx):
-    available_colors = {
-        # List white first such that for gray values, the combination
-        # white!<x>!black is preferred over, e.g., gray!<y>!black. Note that
-        # the order of the dictionary is respected from Python 3.6 on.
-        "white": np.array([1, 1, 1]),
-        "lightgray": np.array([0.75, 0.75, 0.75]),
-        "gray": np.array([0.5, 0.5, 0.5]),
-        "darkgray": np.array([0.25, 0.25, 0.25]),
-        "black": np.array([0, 0, 0]),
-        #
-        "red": np.array([1, 0, 0]),
-        "green": np.array([0, 1, 0]),
-        "blue": np.array([0, 0, 1]),
-        "brown": np.array([0.75, 0.5, 0.25]),
-        "lime": np.array([0.75, 1, 0]),
-        "orange": np.array([1, 0.5, 0]),
-        "pink": np.array([1, 0.75, 0.75]),
-        "purple": np.array([0.75, 0, 0.25]),
-        "teal": np.array([0, 0.5, 0.5]),
-        "violet": np.array([0.5, 0, 0.5]),
-        # The colors cyan, magenta, yellow, and olive are also
-        # predefined by xcolor, but their RGB approximation of the
-        # native CMYK values is not very good. Don't use them here.
-    }
-
-    available_colors.update(data["custom colors"])
-
     # Check if it exactly matches any of the colors already available.
     # This case is actually treated below (alpha==1), but that loop
     # may pick up combinations with black before finding the exact
     # match. Hence, first check all colors.
-    for name, rgb in available_colors.items():
+    for name, rgb in builtin_colors.items():
         if all(my_col[:3] == rgb):
-            xcol = name
-            return data, xcol, my_col
+            return data, name, my_col
 
-    # Check if my_col is a multiple of a predefined color and 'black'.
-    for name, rgb in available_colors.items():
-        if name == "black":
-            continue
+    # Don't handle gray colors separately. They can be specified in xcolor as
+    #
+    #  {gray}{0.6901960784313725}
+    #
+    # but this float representation hides the fact that this is actually an
+    # RGB255 integer value, 176.
 
-        if rgb[0] != 0.0:
-            alpha = my_col[0] / rgb[0]
-        elif rgb[1] != 0.0:
-            alpha = my_col[1] / rgb[1]
-        else:
-            assert rgb[2] != 0.0
-            alpha = my_col[2] / rgb[2]
+    # convert to RGB255
+    rgb255 = np.array(my_col[:3] * 255, dtype=int)
 
-        # The cases 0.0 (my_col == black) and 1.0 (my_col == rgb) are
-        # already accounted for by checking in available_colors above.
-        if all(my_col[:3] == alpha * rgb) and 0.0 < alpha < 1.0:
-            ff = data["float format"]
-            xcol = name + f"!{alpha*100:{ff}}!black"
-            return data, xcol, my_col
-
-    # Lookup failed, add it to the custom list.
-    xcol = "color" + str(len(data["custom colors"]))
-    data["custom colors"][xcol] = my_col[:3]
+    name, diff = _get_closest_colour_name(rgb255)
+    if diff > 0:
+        if np.all(my_col[0] == my_col[:3]):
+            name = f"{name}{rgb255[0]}"
+        else:
+            name = f"{name}{rgb255[0]}{rgb255[1]}{rgb255[2]}"
+    data["custom colors"][name] = ("RGB", ",".join([str(val) for val in rgb255]))
 
-    return data, xcol, my_col
+    return data, name, my_col

src/tikzplotlib/_save.py

@@ -271,10 +271,12 @@ def _tex_comment(comment):
 
 def _get_color_definitions(data):
     """Returns the list of custom color definitions for the TikZ file."""
-    ff = data["float format"]
+    # sort by key
+    sorted_keys = sorted(data["custom colors"].keys(), key=lambda x: x.lower())
+    d = {key: data["custom colors"][key] for key in sorted_keys}
     return [
-        f"\\definecolor{{{name}}}{{rgb}}{{{rgb[0]:{ff}},{rgb[1]:{ff}},{rgb[2]:{ff}}}}"
-        for name, rgb in data["custom colors"].items()
+        f"\\definecolor{{{name}}}{{{space}}}{{{val}}}"
+        for name, (space, val) in d.items()
     ]