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687 lines
23 KiB
Python
687 lines
23 KiB
Python
"""
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pygments.formatters.img
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~~~~~~~~~~~~~~~~~~~~~~~
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Formatter for Pixmap output.
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:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import os
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import sys
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from pygments.formatter import Formatter
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from pygments.util import get_bool_opt, get_int_opt, get_list_opt, \
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get_choice_opt
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import subprocess
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# Import this carefully
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try:
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from PIL import Image, ImageDraw, ImageFont
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pil_available = True
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except ImportError:
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pil_available = False
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try:
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import _winreg
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except ImportError:
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try:
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import winreg as _winreg
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except ImportError:
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_winreg = None
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__all__ = ['ImageFormatter', 'GifImageFormatter', 'JpgImageFormatter',
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'BmpImageFormatter']
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# For some unknown reason every font calls it something different
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STYLES = {
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'NORMAL': ['', 'Roman', 'Book', 'Normal', 'Regular', 'Medium'],
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'ITALIC': ['Oblique', 'Italic'],
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'BOLD': ['Bold'],
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'BOLDITALIC': ['Bold Oblique', 'Bold Italic'],
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}
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# A sane default for modern systems
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DEFAULT_FONT_NAME_NIX = 'DejaVu Sans Mono'
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DEFAULT_FONT_NAME_WIN = 'Courier New'
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DEFAULT_FONT_NAME_MAC = 'Menlo'
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class PilNotAvailable(ImportError):
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"""When Python imaging library is not available"""
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class FontNotFound(Exception):
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"""When there are no usable fonts specified"""
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class FontManager:
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"""
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Manages a set of fonts: normal, italic, bold, etc...
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"""
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def __init__(self, font_name, font_size=14):
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self.font_name = font_name
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self.font_size = font_size
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self.fonts = {}
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self.encoding = None
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self.variable = False
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if hasattr(font_name, 'read') or os.path.isfile(font_name):
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font = ImageFont.truetype(font_name, self.font_size)
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self.variable = True
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for style in STYLES:
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self.fonts[style] = font
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return
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if sys.platform.startswith('win'):
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if not font_name:
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self.font_name = DEFAULT_FONT_NAME_WIN
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self._create_win()
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elif sys.platform.startswith('darwin'):
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if not font_name:
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self.font_name = DEFAULT_FONT_NAME_MAC
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self._create_mac()
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else:
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if not font_name:
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self.font_name = DEFAULT_FONT_NAME_NIX
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self._create_nix()
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def _get_nix_font_path(self, name, style):
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proc = subprocess.Popen(['fc-list', f"{name}:style={style}", 'file'],
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stdout=subprocess.PIPE, stderr=None)
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stdout, _ = proc.communicate()
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if proc.returncode == 0:
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lines = stdout.splitlines()
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for line in lines:
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if line.startswith(b'Fontconfig warning:'):
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continue
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path = line.decode().strip().strip(':')
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if path:
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return path
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return None
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def _create_nix(self):
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for name in STYLES['NORMAL']:
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path = self._get_nix_font_path(self.font_name, name)
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if path is not None:
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self.fonts['NORMAL'] = ImageFont.truetype(path, self.font_size)
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break
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else:
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raise FontNotFound(f'No usable fonts named: "{self.font_name}"')
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for style in ('ITALIC', 'BOLD', 'BOLDITALIC'):
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for stylename in STYLES[style]:
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path = self._get_nix_font_path(self.font_name, stylename)
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if path is not None:
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self.fonts[style] = ImageFont.truetype(path, self.font_size)
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break
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else:
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if style == 'BOLDITALIC':
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self.fonts[style] = self.fonts['BOLD']
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else:
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self.fonts[style] = self.fonts['NORMAL']
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def _get_mac_font_path(self, font_map, name, style):
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return font_map.get((name + ' ' + style).strip().lower())
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def _create_mac(self):
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font_map = {}
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for font_dir in (os.path.join(os.getenv("HOME"), 'Library/Fonts/'),
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'/Library/Fonts/', '/System/Library/Fonts/'):
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font_map.update(
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(os.path.splitext(f)[0].lower(), os.path.join(font_dir, f))
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for _, _, files in os.walk(font_dir)
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for f in files
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if f.lower().endswith(('ttf', 'ttc')))
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for name in STYLES['NORMAL']:
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path = self._get_mac_font_path(font_map, self.font_name, name)
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if path is not None:
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self.fonts['NORMAL'] = ImageFont.truetype(path, self.font_size)
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break
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else:
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raise FontNotFound(f'No usable fonts named: "{self.font_name}"')
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for style in ('ITALIC', 'BOLD', 'BOLDITALIC'):
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for stylename in STYLES[style]:
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path = self._get_mac_font_path(font_map, self.font_name, stylename)
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if path is not None:
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self.fonts[style] = ImageFont.truetype(path, self.font_size)
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break
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else:
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if style == 'BOLDITALIC':
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self.fonts[style] = self.fonts['BOLD']
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else:
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self.fonts[style] = self.fonts['NORMAL']
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def _lookup_win(self, key, basename, styles, fail=False):
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for suffix in ('', ' (TrueType)'):
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for style in styles:
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try:
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valname = '{}{}{}'.format(basename, style and ' '+style, suffix)
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val, _ = _winreg.QueryValueEx(key, valname)
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return val
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except OSError:
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continue
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else:
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if fail:
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raise FontNotFound(f'Font {basename} ({styles[0]}) not found in registry')
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return None
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def _create_win(self):
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lookuperror = None
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keynames = [ (_winreg.HKEY_CURRENT_USER, r'Software\Microsoft\Windows NT\CurrentVersion\Fonts'),
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(_winreg.HKEY_CURRENT_USER, r'Software\Microsoft\Windows\CurrentVersion\Fonts'),
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(_winreg.HKEY_LOCAL_MACHINE, r'Software\Microsoft\Windows NT\CurrentVersion\Fonts'),
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(_winreg.HKEY_LOCAL_MACHINE, r'Software\Microsoft\Windows\CurrentVersion\Fonts') ]
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for keyname in keynames:
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try:
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key = _winreg.OpenKey(*keyname)
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try:
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path = self._lookup_win(key, self.font_name, STYLES['NORMAL'], True)
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self.fonts['NORMAL'] = ImageFont.truetype(path, self.font_size)
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for style in ('ITALIC', 'BOLD', 'BOLDITALIC'):
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path = self._lookup_win(key, self.font_name, STYLES[style])
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if path:
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self.fonts[style] = ImageFont.truetype(path, self.font_size)
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else:
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if style == 'BOLDITALIC':
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self.fonts[style] = self.fonts['BOLD']
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else:
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self.fonts[style] = self.fonts['NORMAL']
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return
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except FontNotFound as err:
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lookuperror = err
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finally:
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_winreg.CloseKey(key)
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except OSError:
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pass
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else:
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# If we get here, we checked all registry keys and had no luck
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# We can be in one of two situations now:
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# * All key lookups failed. In this case lookuperror is None and we
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# will raise a generic error
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# * At least one lookup failed with a FontNotFound error. In this
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# case, we will raise that as a more specific error
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if lookuperror:
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raise lookuperror
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raise FontNotFound('Can\'t open Windows font registry key')
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def get_char_size(self):
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"""
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Get the character size.
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"""
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return self.get_text_size('M')
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def get_text_size(self, text):
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"""
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Get the text size (width, height).
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"""
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font = self.fonts['NORMAL']
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if hasattr(font, 'getbbox'): # Pillow >= 9.2.0
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return font.getbbox(text)[2:4]
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else:
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return font.getsize(text)
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def get_font(self, bold, oblique):
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"""
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Get the font based on bold and italic flags.
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"""
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if bold and oblique:
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if self.variable:
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return self.get_style('BOLDITALIC')
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return self.fonts['BOLDITALIC']
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elif bold:
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if self.variable:
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return self.get_style('BOLD')
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return self.fonts['BOLD']
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elif oblique:
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if self.variable:
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return self.get_style('ITALIC')
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return self.fonts['ITALIC']
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else:
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if self.variable:
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return self.get_style('NORMAL')
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return self.fonts['NORMAL']
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def get_style(self, style):
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"""
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Get the specified style of the font if it is a variable font.
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If not found, return the normal font.
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"""
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font = self.fonts[style]
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for style_name in STYLES[style]:
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try:
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font.set_variation_by_name(style_name)
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return font
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except ValueError:
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pass
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except OSError:
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return font
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return font
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class ImageFormatter(Formatter):
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"""
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Create a PNG image from source code. This uses the Python Imaging Library to
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generate a pixmap from the source code.
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.. versionadded:: 0.10
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Additional options accepted:
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`image_format`
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An image format to output to that is recognised by PIL, these include:
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* "PNG" (default)
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* "JPEG"
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* "BMP"
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* "GIF"
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`line_pad`
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The extra spacing (in pixels) between each line of text.
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Default: 2
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`font_name`
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The font name to be used as the base font from which others, such as
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bold and italic fonts will be generated. This really should be a
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monospace font to look sane.
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If a filename or a file-like object is specified, the user must
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provide different styles of the font.
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Default: "Courier New" on Windows, "Menlo" on Mac OS, and
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"DejaVu Sans Mono" on \\*nix
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`font_size`
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The font size in points to be used.
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Default: 14
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`image_pad`
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The padding, in pixels to be used at each edge of the resulting image.
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Default: 10
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`line_numbers`
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Whether line numbers should be shown: True/False
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Default: True
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`line_number_start`
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The line number of the first line.
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Default: 1
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`line_number_step`
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The step used when printing line numbers.
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Default: 1
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`line_number_bg`
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The background colour (in "#123456" format) of the line number bar, or
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None to use the style background color.
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Default: "#eed"
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`line_number_fg`
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The text color of the line numbers (in "#123456"-like format).
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Default: "#886"
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`line_number_chars`
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The number of columns of line numbers allowable in the line number
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margin.
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Default: 2
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`line_number_bold`
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Whether line numbers will be bold: True/False
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Default: False
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`line_number_italic`
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Whether line numbers will be italicized: True/False
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Default: False
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`line_number_separator`
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Whether a line will be drawn between the line number area and the
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source code area: True/False
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Default: True
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`line_number_pad`
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The horizontal padding (in pixels) between the line number margin, and
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the source code area.
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Default: 6
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`hl_lines`
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Specify a list of lines to be highlighted.
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.. versionadded:: 1.2
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Default: empty list
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`hl_color`
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Specify the color for highlighting lines.
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.. versionadded:: 1.2
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Default: highlight color of the selected style
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"""
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# Required by the pygments mapper
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name = 'img'
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aliases = ['img', 'IMG', 'png']
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filenames = ['*.png']
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unicodeoutput = False
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default_image_format = 'png'
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def __init__(self, **options):
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"""
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See the class docstring for explanation of options.
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"""
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if not pil_available:
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raise PilNotAvailable(
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'Python Imaging Library is required for this formatter')
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Formatter.__init__(self, **options)
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self.encoding = 'latin1' # let pygments.format() do the right thing
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# Read the style
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self.styles = dict(self.style)
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if self.style.background_color is None:
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self.background_color = '#fff'
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else:
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self.background_color = self.style.background_color
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# Image options
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self.image_format = get_choice_opt(
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options, 'image_format', ['png', 'jpeg', 'gif', 'bmp'],
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self.default_image_format, normcase=True)
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self.image_pad = get_int_opt(options, 'image_pad', 10)
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self.line_pad = get_int_opt(options, 'line_pad', 2)
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# The fonts
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fontsize = get_int_opt(options, 'font_size', 14)
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self.fonts = FontManager(options.get('font_name', ''), fontsize)
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self.fontw, self.fonth = self.fonts.get_char_size()
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# Line number options
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self.line_number_fg = options.get('line_number_fg', '#886')
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self.line_number_bg = options.get('line_number_bg', '#eed')
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self.line_number_chars = get_int_opt(options,
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'line_number_chars', 2)
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self.line_number_bold = get_bool_opt(options,
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'line_number_bold', False)
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self.line_number_italic = get_bool_opt(options,
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'line_number_italic', False)
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self.line_number_pad = get_int_opt(options, 'line_number_pad', 6)
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self.line_numbers = get_bool_opt(options, 'line_numbers', True)
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self.line_number_separator = get_bool_opt(options,
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'line_number_separator', True)
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self.line_number_step = get_int_opt(options, 'line_number_step', 1)
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self.line_number_start = get_int_opt(options, 'line_number_start', 1)
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if self.line_numbers:
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self.line_number_width = (self.fontw * self.line_number_chars +
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self.line_number_pad * 2)
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else:
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self.line_number_width = 0
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self.hl_lines = []
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hl_lines_str = get_list_opt(options, 'hl_lines', [])
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for line in hl_lines_str:
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try:
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self.hl_lines.append(int(line))
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except ValueError:
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pass
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self.hl_color = options.get('hl_color',
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self.style.highlight_color) or '#f90'
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self.drawables = []
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def get_style_defs(self, arg=''):
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raise NotImplementedError('The -S option is meaningless for the image '
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'formatter. Use -O style=<stylename> instead.')
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def _get_line_height(self):
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"""
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Get the height of a line.
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"""
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return self.fonth + self.line_pad
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def _get_line_y(self, lineno):
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"""
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Get the Y coordinate of a line number.
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"""
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return lineno * self._get_line_height() + self.image_pad
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def _get_char_width(self):
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"""
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Get the width of a character.
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"""
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return self.fontw
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def _get_char_x(self, linelength):
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"""
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Get the X coordinate of a character position.
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"""
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return linelength + self.image_pad + self.line_number_width
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def _get_text_pos(self, linelength, lineno):
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"""
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Get the actual position for a character and line position.
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"""
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return self._get_char_x(linelength), self._get_line_y(lineno)
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def _get_linenumber_pos(self, lineno):
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"""
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Get the actual position for the start of a line number.
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"""
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return (self.image_pad, self._get_line_y(lineno))
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def _get_text_color(self, style):
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"""
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Get the correct color for the token from the style.
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"""
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if style['color'] is not None:
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fill = '#' + style['color']
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else:
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fill = '#000'
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return fill
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def _get_text_bg_color(self, style):
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"""
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Get the correct background color for the token from the style.
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"""
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if style['bgcolor'] is not None:
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bg_color = '#' + style['bgcolor']
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else:
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bg_color = None
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return bg_color
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def _get_style_font(self, style):
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"""
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Get the correct font for the style.
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"""
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return self.fonts.get_font(style['bold'], style['italic'])
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|
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def _get_image_size(self, maxlinelength, maxlineno):
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"""
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Get the required image size.
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"""
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return (self._get_char_x(maxlinelength) + self.image_pad,
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self._get_line_y(maxlineno + 0) + self.image_pad)
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def _draw_linenumber(self, posno, lineno):
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"""
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Remember a line number drawable to paint later.
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"""
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self._draw_text(
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self._get_linenumber_pos(posno),
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str(lineno).rjust(self.line_number_chars),
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font=self.fonts.get_font(self.line_number_bold,
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self.line_number_italic),
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text_fg=self.line_number_fg,
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text_bg=None,
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)
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def _draw_text(self, pos, text, font, text_fg, text_bg):
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"""
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Remember a single drawable tuple to paint later.
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"""
|
|
self.drawables.append((pos, text, font, text_fg, text_bg))
|
|
|
|
def _create_drawables(self, tokensource):
|
|
"""
|
|
Create drawables for the token content.
|
|
"""
|
|
lineno = charno = maxcharno = 0
|
|
maxlinelength = linelength = 0
|
|
for ttype, value in tokensource:
|
|
while ttype not in self.styles:
|
|
ttype = ttype.parent
|
|
style = self.styles[ttype]
|
|
# TODO: make sure tab expansion happens earlier in the chain. It
|
|
# really ought to be done on the input, as to do it right here is
|
|
# quite complex.
|
|
value = value.expandtabs(4)
|
|
lines = value.splitlines(True)
|
|
# print lines
|
|
for i, line in enumerate(lines):
|
|
temp = line.rstrip('\n')
|
|
if temp:
|
|
self._draw_text(
|
|
self._get_text_pos(linelength, lineno),
|
|
temp,
|
|
font = self._get_style_font(style),
|
|
text_fg = self._get_text_color(style),
|
|
text_bg = self._get_text_bg_color(style),
|
|
)
|
|
temp_width, _ = self.fonts.get_text_size(temp)
|
|
linelength += temp_width
|
|
maxlinelength = max(maxlinelength, linelength)
|
|
charno += len(temp)
|
|
maxcharno = max(maxcharno, charno)
|
|
if line.endswith('\n'):
|
|
# add a line for each extra line in the value
|
|
linelength = 0
|
|
charno = 0
|
|
lineno += 1
|
|
self.maxlinelength = maxlinelength
|
|
self.maxcharno = maxcharno
|
|
self.maxlineno = lineno
|
|
|
|
def _draw_line_numbers(self):
|
|
"""
|
|
Create drawables for the line numbers.
|
|
"""
|
|
if not self.line_numbers:
|
|
return
|
|
for p in range(self.maxlineno):
|
|
n = p + self.line_number_start
|
|
if (n % self.line_number_step) == 0:
|
|
self._draw_linenumber(p, n)
|
|
|
|
def _paint_line_number_bg(self, im):
|
|
"""
|
|
Paint the line number background on the image.
|
|
"""
|
|
if not self.line_numbers:
|
|
return
|
|
if self.line_number_fg is None:
|
|
return
|
|
draw = ImageDraw.Draw(im)
|
|
recth = im.size[-1]
|
|
rectw = self.image_pad + self.line_number_width - self.line_number_pad
|
|
draw.rectangle([(0, 0), (rectw, recth)],
|
|
fill=self.line_number_bg)
|
|
if self.line_number_separator:
|
|
draw.line([(rectw, 0), (rectw, recth)], fill=self.line_number_fg)
|
|
del draw
|
|
|
|
def format(self, tokensource, outfile):
|
|
"""
|
|
Format ``tokensource``, an iterable of ``(tokentype, tokenstring)``
|
|
tuples and write it into ``outfile``.
|
|
|
|
This implementation calculates where it should draw each token on the
|
|
pixmap, then calculates the required pixmap size and draws the items.
|
|
"""
|
|
self._create_drawables(tokensource)
|
|
self._draw_line_numbers()
|
|
im = Image.new(
|
|
'RGB',
|
|
self._get_image_size(self.maxlinelength, self.maxlineno),
|
|
self.background_color
|
|
)
|
|
self._paint_line_number_bg(im)
|
|
draw = ImageDraw.Draw(im)
|
|
# Highlight
|
|
if self.hl_lines:
|
|
x = self.image_pad + self.line_number_width - self.line_number_pad + 1
|
|
recth = self._get_line_height()
|
|
rectw = im.size[0] - x
|
|
for linenumber in self.hl_lines:
|
|
y = self._get_line_y(linenumber - 1)
|
|
draw.rectangle([(x, y), (x + rectw, y + recth)],
|
|
fill=self.hl_color)
|
|
for pos, value, font, text_fg, text_bg in self.drawables:
|
|
if text_bg:
|
|
# see deprecations https://pillow.readthedocs.io/en/stable/releasenotes/9.2.0.html#font-size-and-offset-methods
|
|
if hasattr(draw, 'textsize'):
|
|
text_size = draw.textsize(text=value, font=font)
|
|
else:
|
|
text_size = font.getbbox(value)[2:]
|
|
draw.rectangle([pos[0], pos[1], pos[0] + text_size[0], pos[1] + text_size[1]], fill=text_bg)
|
|
draw.text(pos, value, font=font, fill=text_fg)
|
|
im.save(outfile, self.image_format.upper())
|
|
|
|
|
|
# Add one formatter per format, so that the "-f gif" option gives the correct result
|
|
# when used in pygmentize.
|
|
|
|
class GifImageFormatter(ImageFormatter):
|
|
"""
|
|
Create a GIF image from source code. This uses the Python Imaging Library to
|
|
generate a pixmap from the source code.
|
|
|
|
.. versionadded:: 1.0
|
|
"""
|
|
|
|
name = 'img_gif'
|
|
aliases = ['gif']
|
|
filenames = ['*.gif']
|
|
default_image_format = 'gif'
|
|
|
|
|
|
class JpgImageFormatter(ImageFormatter):
|
|
"""
|
|
Create a JPEG image from source code. This uses the Python Imaging Library to
|
|
generate a pixmap from the source code.
|
|
|
|
.. versionadded:: 1.0
|
|
"""
|
|
|
|
name = 'img_jpg'
|
|
aliases = ['jpg', 'jpeg']
|
|
filenames = ['*.jpg']
|
|
default_image_format = 'jpeg'
|
|
|
|
|
|
class BmpImageFormatter(ImageFormatter):
|
|
"""
|
|
Create a bitmap image from source code. This uses the Python Imaging Library to
|
|
generate a pixmap from the source code.
|
|
|
|
.. versionadded:: 1.0
|
|
"""
|
|
|
|
name = 'img_bmp'
|
|
aliases = ['bmp', 'bitmap']
|
|
filenames = ['*.bmp']
|
|
default_image_format = 'bmp'
|