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- Drop support for Python <3.7 - Bump the pre-commit version used in CI - Add type hinting and docstrings - Add mypy to pre-commit config - Fix typing issues - Update colors module - Update colors module to use uppercase hex codes - Add `__lt__` to allow sorting colors by name - Fix `build_examples.py` to work with color Enum - Update example badges in `README.md` - Fix typing issues in server - Update travis links in `README.md` - Fix PyPi deployment bug (#60)
63 lines
2.1 KiB
Python
63 lines
2.1 KiB
Python
# Based on the following SO answer: https://stackoverflow.com/a/16008023/6252525
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def _get_approx_string_width(text, font_width, fixed_width=False) -> int:
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"""
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Get the approximate width of a string using a specific average font width.
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Args:
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text(str): Text string to calculate width of.
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font_width(int): Average width of font characters.
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fixed_width(bool): Indicates that the font is fixed width.
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Returns:
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int: Width of string in pixels.
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Examples:
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Call the function with a string and the maximum character width of the font you are using:
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>>> int(_get_approx_string_width('hello', 10))
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29
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This example shows the comparison of simplistic calculation based on a fixed width.
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Given a test string and a fixed font width of 10, we can calculate the width
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by multiplying the length and the font character with:
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>>> test_string = 'GOOGLE|ijkl'
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>>> _get_approx_string_width(test_string, 10, fixed_width=True)
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110
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Since some characters in the string are thinner than others we expect that the
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apporximate text width will be narrower than the fixed width calculation:
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>>> _get_approx_string_width(test_string, 10)
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77
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"""
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if fixed_width:
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return len(text) * font_width
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size = 0.0
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# A dictionary containing percentages that relate to how wide
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# each character will be represented in a variable width font.
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# These percentages can be calculated using the ``_get_character_percentage_dict`` function.
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char_width_percentages = {
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"lij|' ": 40.0,
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"![]fI.,:;/\\t": 50.0,
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'`-(){}r"': 60.0,
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"*^zcsJkvxy": 70.0,
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"aebdhnopqug#$L+<>=?_~FZT0123456789": 70.0,
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"BSPEAKVXY&UwNRCHD": 70.0,
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"QGOMm%W@": 100.0,
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}
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for s in text:
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percentage = 100.0
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for k in char_width_percentages.keys():
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if s in k:
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percentage = char_width_percentages[k]
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break
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size += (percentage / 100.0) * float(font_width)
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return int(size)
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