From a1976450877b49fef09a6c5e181152784b9a0af9 Mon Sep 17 00:00:00 2001
From: Anthony Sottile <asottile@umich.edu>
Date: Thu, 26 Mar 2020 20:26:57 -0700
Subject: [PATCH] merge the textmate demo into babi

---
 babi/textmate_demo.py       | 69 ++++++++++++++++++++++++++++++
 setup.cfg                   |  1 +
 tests/textmate_demo_test.py | 84 +++++++++++++++++++++++++++++++++++++
 3 files changed, 154 insertions(+)
 create mode 100644 babi/textmate_demo.py
 create mode 100644 tests/textmate_demo_test.py

diff --git a/babi/textmate_demo.py b/babi/textmate_demo.py
new file mode 100644
index 0000000..c4886ad
--- /dev/null
+++ b/babi/textmate_demo.py
@@ -0,0 +1,69 @@
+import argparse
+from typing import Optional
+from typing import Sequence
+
+from babi.highlight import Compiler
+from babi.highlight import Grammars
+from babi.highlight import highlight_line
+from babi.theme import Style
+from babi.theme import Theme
+from babi.user_data import prefix_data
+from babi.user_data import xdg_config
+
+
+def print_styled(s: str, style: Style) -> None:
+    color_s = ''
+    undo_s = ''
+    if style.fg is not None:
+        color_s += '\x1b[38;2;{r};{g};{b}m'.format(**style.fg._asdict())
+        undo_s += '\x1b[39m'
+    if style.bg is not None:
+        color_s += '\x1b[48;2;{r};{g};{b}m'.format(**style.bg._asdict())
+        undo_s += '\x1b[49m'
+    if style.b:
+        color_s += '\x1b[1m'
+        undo_s += '\x1b[22m'
+    if style.i:
+        color_s += '\x1b[3m'
+        undo_s += '\x1b[23m'
+    if style.u:
+        color_s += '\x1b[4m'
+        undo_s += '\x1b[24m'
+    print(f'{color_s}{s}{undo_s}', end='', flush=True)
+
+
+def _highlight_output(theme: Theme, compiler: Compiler, filename: str) -> int:
+    state = compiler.root_state
+
+    if theme.default.bg is not None:
+        print('\x1b[48;2;{r};{g};{b}m'.format(**theme.default.bg._asdict()))
+    with open(filename) as f:
+        for line_idx, line in enumerate(f):
+            first_line = line_idx == 0
+            state, regions = highlight_line(compiler, state, line, first_line)
+            for start, end, scope in regions:
+                print_styled(line[start:end], theme.select(scope))
+    print('\x1b[m', end='')
+    return 0
+
+
+def main(argv: Optional[Sequence[str]] = None) -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--theme', default=xdg_config('theme.json'))
+    parser.add_argument('--grammar-dir', default=prefix_data('grammar_v1'))
+    parser.add_argument('filename')
+    args = parser.parse_args(argv)
+
+    with open(args.filename) as f:
+        first_line = next(f, '')
+
+    theme = Theme.from_filename(args.theme)
+
+    grammars = Grammars(args.grammar_dir)
+    compiler = grammars.compiler_for_file(args.filename, first_line)
+
+    return _highlight_output(theme, compiler, args.filename)
+
+
+if __name__ == '__main__':
+    exit(main())
diff --git a/setup.cfg b/setup.cfg
index 8331968..6015c70 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -32,6 +32,7 @@ python_requires = >=3.6.1
 [options.entry_points]
 console_scripts =
     babi = babi.main:main
+    babi-textmate-demo = babi.textmate_demo:main
 
 [options.packages.find]
 exclude =
diff --git a/tests/textmate_demo_test.py b/tests/textmate_demo_test.py
new file mode 100644
index 0000000..93a753b
--- /dev/null
+++ b/tests/textmate_demo_test.py
@@ -0,0 +1,84 @@
+import json
+
+import pytest
+
+from babi.textmate_demo import main
+
+THEME = {
+    'colors': {'foreground': '#ffffff', 'background': '#000000'},
+    'tokenColors': [
+        {'scope': 'bold', 'settings': {'fontStyle': 'bold'}},
+        {'scope': 'italic', 'settings': {'fontStyle': 'italic'}},
+        {'scope': 'underline', 'settings': {'fontStyle': 'underline'}},
+        {'scope': 'comment', 'settings': {'foreground': '#1e77d3'}},
+    ],
+}
+
+GRAMMAR = {
+    'scopeName': 'source.demo',
+    'fileTypes': ['demo'],
+    'patterns': [
+        {'match': r'\*[^*]*\*', 'name': 'bold'},
+        {'match': '/[^/]*/', 'name': 'italic'},
+        {'match': '_[^_]*_', 'name': 'underline'},
+        {'match': '#.*', 'name': 'comment'},
+    ],
+}
+
+
+@pytest.fixture
+def theme_grammars(tmpdir):
+    theme = tmpdir.join('config/theme.json').ensure()
+    theme.write(json.dumps(THEME))
+    grammars = tmpdir.join('grammar_v1').ensure_dir()
+    grammars.join('source.demo.json').write(json.dumps(GRAMMAR))
+    return theme, grammars
+
+
+def test_basic(theme_grammars, tmpdir, capsys):
+    theme, grammars = theme_grammars
+
+    f = tmpdir.join('f.demo')
+    f.write('*bold*/italic/_underline_# comment\n')
+
+    assert not main((
+        '--theme', str(theme), '--grammar-dir', str(grammars),
+        str(f),
+    ))
+
+    out, _ = capsys.readouterr()
+
+    assert out == (
+        '\x1b[48;2;0;0;0m\n'
+        '\x1b[38;2;255;255;255m\x1b[48;2;0;0;0m\x1b[1m'
+        '*bold*'
+        '\x1b[39m\x1b[49m\x1b[22m'
+        '\x1b[38;2;255;255;255m\x1b[48;2;0;0;0m\x1b[3m'
+        '/italic/'
+        '\x1b[39m\x1b[49m\x1b[23m'
+        '\x1b[38;2;255;255;255m\x1b[48;2;0;0;0m\x1b[4m'
+        '_underline_'
+        '\x1b[39m\x1b[49m\x1b[24m'
+        '\x1b[38;2;30;119;211m\x1b[48;2;0;0;0m'
+        '# comment'
+        '\x1b[39m\x1b[49m\x1b'
+        '[38;2;255;255;255m\x1b[48;2;0;0;0m\n\x1b[39m\x1b[49m'
+        '\x1b[m'
+    )
+
+
+def test_basic_with_blank_theme(theme_grammars, tmpdir, capsys):
+    theme, grammars = theme_grammars
+    theme.write('{}')
+
+    f = tmpdir.join('f.demo')
+    f.write('*bold*/italic/_underline_# comment\n')
+
+    assert not main((
+        '--theme', str(theme), '--grammar-dir', str(grammars),
+        str(f),
+    ))
+
+    out, _ = capsys.readouterr()
+
+    assert out == '*bold*/italic/_underline_# comment\n\x1b[m'