Remove unused code
This commit is contained in:
Kovid Goyal
parent
729395c887
commit
d873d11202
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#!/usr/bin/env python
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# vim:fileencoding=utf-8
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# License: GPL v3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
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import ctypes
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import sys
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from functools import lru_cache, partial
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from itertools import chain
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from kitty.fast_data_types import Face, FreeTypeError
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from kitty.fonts.box_drawing import render_missing_glyph
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from kitty.utils import ceil_int, get_logical_dpi, safe_print, wcwidth, adjust_line_height
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from .fontconfig import (
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FontNotFound, find_font_for_characters, font_for_family, get_font_files
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)
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current_font_family = current_font_family_name = cff_size = cell_width = cell_height = baseline = None
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CharTexture = underline_position = underline_thickness = None
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alt_face_cache = {}
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symbol_map = {}
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def set_char_size(face, width=0, height=0, hres=0, vres=0):
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face.set_char_size(width, height, hres, vres)
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@lru_cache(maxsize=2**10)
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def font_for_text(char, bold=False, italic=False, allow_bitmaped_fonts=False):
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if allow_bitmaped_fonts:
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return find_font_for_characters(
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current_font_family_name,
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char,
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bold,
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italic,
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allow_bitmaped_fonts=True,
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size_in_pts=cff_size['width'] / 64,
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dpi=(cff_size['hres'] + cff_size['vres']) / 2
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)
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return find_font_for_characters(
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current_font_family_name, char, bold, italic
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)
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def install_symbol_map(val):
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global symbol_map
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symbol_map = {}
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family_map = {f: font_for_family(f) for f in set(val.values())}
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for ch, family in val.items():
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symbol_map[ch] = family_map[family]
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def font_units_to_pixels(x, units_per_em, size_in_pts, dpi):
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return ceil_int(x * ((size_in_pts * dpi) / (72 * units_per_em)))
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def set_font_family(opts, override_font_size=None):
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global current_font_family, current_font_family_name, cff_size, cell_width, cell_height, CharTexture, baseline
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global underline_position, underline_thickness
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size_in_pts = override_font_size or opts.font_size
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current_font_family = get_font_files(opts)
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current_font_family_name = opts.font_family
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dpi = get_logical_dpi()
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cff_size = ceil_int(64 * size_in_pts)
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cff_size = {
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'width': cff_size,
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'height': cff_size,
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'hres': int(dpi[0]),
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'vres': int(dpi[1])
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}
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install_symbol_map(opts.symbol_map)
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for fobj in chain(current_font_family.values(), symbol_map.values()):
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set_char_size(fobj.face, **cff_size)
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face = current_font_family['regular'].face
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cell_width = face.calc_cell_width()
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cell_height = font_units_to_pixels(
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face.height, face.units_per_EM, size_in_pts, dpi[1]
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)
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cell_height = adjust_line_height(cell_height, opts.adjust_line_height)
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baseline = font_units_to_pixels(
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face.ascender, face.units_per_EM, size_in_pts, dpi[1]
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)
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underline_position = min(
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baseline - font_units_to_pixels(
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face.underline_position, face.units_per_EM, size_in_pts, dpi[1]
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), cell_height - 1
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)
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underline_thickness = font_units_to_pixels(
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face.underline_thickness, face.units_per_EM, size_in_pts, dpi[1]
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)
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CharTexture = ctypes.c_ubyte * (cell_width * cell_height)
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font_for_text.cache_clear()
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alt_face_cache.clear()
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return cell_width, cell_height
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def font_has_text(font, text):
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for c in text:
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if not font.face.get_char_index(c):
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return False
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return True
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def face_for_text(text, bold=False, italic=False):
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key = 'regular'
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if bold:
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key = 'bi' if italic else 'bold'
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elif italic:
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key = 'italic'
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font = symbol_map.get(text[0])
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if font is None or not font_has_text(font, text):
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font = current_font_family.get(key) or current_font_family['regular']
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face = font.face
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if not font_has_text(font, text):
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try:
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font = font_for_text(text, bold, italic)
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except FontNotFound:
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font = font_for_text(
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text, bold, italic, allow_bitmaped_fonts=True
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)
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face = alt_face_cache.get(font)
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if face is None:
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face = alt_face_cache[font] = Face(font.face, font.index, font.hinting, font.hintstyle)
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if face.is_scalable:
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set_char_size(face, **cff_size)
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else:
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face = font.face
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return font, face
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def render_text(text, bold=False, italic=False, num_cells=1):
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if text == ' ' and num_cells == 1:
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return (CharTexture(),)
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font, face = face_for_text(text, bold, italic)
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func = partial(face.draw_single_glyph, ord(text[0])) if len(text) == 1 else partial(face.draw_complex_glyph, text)
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if num_cells == 1:
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buf = CharTexture()
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ans = (buf,)
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else:
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buf = (ctypes.c_ubyte * (cell_width * num_cells * cell_height))()
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ans = tuple(CharTexture() for i in range(num_cells))
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func(cell_width, cell_height, ctypes.addressof(buf), num_cells, bold, italic, baseline)
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if num_cells > 1:
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face.split_cells(cell_width, cell_height, ctypes.addressof(buf), *(ctypes.addressof(x) for x in ans))
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return ans
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def current_cell():
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return CharTexture, cell_width, cell_height, baseline, underline_thickness, underline_position
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@lru_cache(maxsize=8)
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def missing_glyph(num_cells, cell_width, cell_height):
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w = cell_width * num_cells
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ans = bytearray(w * cell_height)
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render_missing_glyph(ans, w, cell_height)
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buf = (ctypes.c_ubyte * w * cell_height).from_buffer(ans)
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face = current_font_family['regular'].face
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bufs = tuple(CharTexture() for i in range(num_cells))
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face.split_cells(cell_width, cell_height, ctypes.addressof(buf), *(ctypes.addressof(x) for x in bufs))
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if num_cells == 2:
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first, second = bufs
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else:
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first, second = bufs[0], None
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return first, second
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def render_cell(text=' ', bold=False, italic=False):
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num_cells = wcwidth(text[0])
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if num_cells < 1:
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return render_cell()
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def safe_freetype(func):
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try:
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return func(text, bold, italic, num_cells)
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except FontNotFound as err:
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safe_print('ERROR:', err, file=sys.stderr)
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except FreeTypeError as err:
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safe_print('Failed to render text:', repr(text), 'with error:', err, file=sys.stderr)
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ret = safe_freetype(render_text)
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if ret is None:
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return missing_glyph(num_cells, cell_width, cell_height)
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if num_cells == 1:
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first, second = ret[0], None
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else:
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first, second = ret
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return first, second
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