upload

bin/gtkcolors.py

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+#!/usr/bin/env python3
+
+"""
+Based on labwc-gtktheme.py:
+Create labwc theme based on the current Gtk theme
+
+SPDX-License-Identifier: GPL-2.0-only
+
+Copyright (C) @Misko_2083 2019
+Copyright (C) Johan Malm 2019-2022
+"""
+
+import os
+import errno
+from tokenize import tokenize, NUMBER, NAME, OP
+from io import BytesIO
+import gi
+gi.require_version("Gtk", "3.0")
+from gi.repository import Gtk
+
+def parse(tokens):
+    """
+    Parse css color expression token list and return red/green/blue values
+    Valid name-tokens include 'rgb' and 'rgba', whereas 'alpha', 'shade' and
+    'mix' are ignored. @other-color references are still to be implemented.
+    """
+    nr_colors_to_parse = 0
+    in_label = False
+    color = []
+    for toknum, tokval, _, _, _ in tokens:
+        if '@' in tokval:
+            in_label = True
+            continue
+        if toknum == NAME and in_label:
+            color.clear()
+            color.append(f"@{tokval}")
+            return color
+        if nr_colors_to_parse > 0:
+            if toknum == OP and tokval in ')':
+                print("warn: still parsing numbers; did not expect ')'")
+            if toknum == NUMBER:
+                color.append(tokval)
+                nr_colors_to_parse -= 1
+            continue
+        if toknum == NAME and tokval in 'rgb':
+            nr_colors_to_parse = 3
+        elif toknum == NAME and tokval in 'rgba':
+            nr_colors_to_parse = 4
+    return color
+
+def color_hex(color):
+    """ return rrggbb color hex from list [r, g, b,...] """
+    if not color:
+        return "None"
+    elif len(color) < 3:
+        return f"{color[0]}"
+    return '{:02x}{:02x}{:02x}'.format(*(int(x) for x in color[:3]))
+
+def hex_from_expr(line):
+    """ parse color expression to return hex style rrggbb """
+    tokens = tokenize(BytesIO(line.encode('utf-8')).readline)
+    color = parse(tokens)
+    return color_hex(color)
+
+def parse_section(lines, name):
+    theme = {}
+    inside = False
+    for line in lines:
+        if f"{name} {{" in line:
+            inside = True
+            continue
+        if inside:
+            if "}" in line or "{" in line:
+                inside = False
+                break
+            if 'color' not in line:
+                continue
+            key, value = line.strip().split(":", maxsplit=1)
+            theme[f'{name}.{key.replace(" ", "")}'] = hex_from_expr(value)
+    return theme
+
+def resolve_labels(theme):
+    for key, label in theme.items():
+        if '@' in label:
+            for tmp, value in theme.items():
+                if tmp == label[1:]:
+                    theme[key] = value
+                    return resolve_labels(theme)
+    return theme
+
+def main():
+    """ main """
+
+    gset = Gtk.Settings.get_default()
+    themename = gset.get_property("gtk-theme-name")
+    css = Gtk.CssProvider.get_named(themename).to_string()
+
+    lines = css.split("\n")
+    theme = {}
+
+    # Parse @define-color lines using syntax "@define-color <key> <value>"
+    for line in lines:
+        if "@define-color" not in line:
+            continue
+        x = line.split(" ", maxsplit=2)
+        theme[x[1]] = hex_from_expr(x[2])
+
+    # Add the color definitions in the headerbar{} and menu{} sections
+    theme |= parse_section(lines, "headerbar")
+    theme |= parse_section(lines, "menu")
+
+    theme = resolve_labels(theme)
+
+    for key, value in theme.items():
+        print(f"{key}: {value}")
+    return
+
+if __name__ == '__main__':
+    main()