Viewing file:  img.py (22.74 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
"""
pygments.formatters.img
~~~~~~~~~~~~~~~~~~~~~~~
Formatter for Pixmap output.
:copyright: Copyright 2006-2024 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import os
import sys
from pip._vendor.pygments.formatter import Formatter
from pip._vendor.pygments.util import get_bool_opt, get_int_opt, get_list_opt, \
get_choice_opt
import subprocess
# Import this carefully
try:
from PIL import Image, ImageDraw, ImageFont
pil_available = True
except ImportError:
pil_available = False
try:
import _winreg
except ImportError:
try:
import winreg as _winreg
except ImportError:
_winreg = None
__all__ = ['ImageFormatter', 'GifImageFormatter', 'JpgImageFormatter',
'BmpImageFormatter']
# For some unknown reason every font calls it something different
STYLES = {
'NORMAL': ['', 'Roman', 'Book', 'Normal', 'Regular', 'Medium'],
'ITALIC': ['Oblique', 'Italic'],
'BOLD': ['Bold'],
'BOLDITALIC': ['Bold Oblique', 'Bold Italic'],
}
# A sane default for modern systems
DEFAULT_FONT_NAME_NIX = 'DejaVu Sans Mono'
DEFAULT_FONT_NAME_WIN = 'Courier New'
DEFAULT_FONT_NAME_MAC = 'Menlo'
class PilNotAvailable(ImportError):
"""When Python imaging library is not available"""
class FontNotFound(Exception):
"""When there are no usable fonts specified"""
class FontManager:
"""
Manages a set of fonts: normal, italic, bold, etc...
"""
def __init__(self, font_name, font_size=14):
self.font_name = font_name
self.font_size = font_size
self.fonts = {}
self.encoding = None
self.variable = False
if hasattr(font_name, 'read') or os.path.isfile(font_name):
font = ImageFont.truetype(font_name, self.font_size)
self.variable = True
for style in STYLES:
self.fonts[style] = font
return
if sys.platform.startswith('win'):
if not font_name:
self.font_name = DEFAULT_FONT_NAME_WIN
self._create_win()
elif sys.platform.startswith('darwin'):
if not font_name:
self.font_name = DEFAULT_FONT_NAME_MAC
self._create_mac()
else:
if not font_name:
self.font_name = DEFAULT_FONT_NAME_NIX
self._create_nix()
def _get_nix_font_path(self, name, style):
proc = subprocess.Popen(['fc-list', f"{name}:style={style}", 'file'],
stdout=subprocess.PIPE, stderr=None)
stdout, _ = proc.communicate()
if proc.returncode == 0:
lines = stdout.splitlines()
for line in lines:
if line.startswith(b'Fontconfig warning:'):
continue
path = line.decode().strip().strip(':')
if path:
return path
return None
def _create_nix(self):
for name in STYLES['NORMAL']:
path = self._get_nix_font_path(self.font_name, name)
if path is not None:
self.fonts['NORMAL'] = ImageFont.truetype(path, self.font_size)
break
else:
raise FontNotFound(f'No usable fonts named: "{self.font_name}"')
for style in ('ITALIC', 'BOLD', 'BOLDITALIC'):
for stylename in STYLES[style]:
path = self._get_nix_font_path(self.font_name, stylename)
if path is not None:
self.fonts[style] = ImageFont.truetype(path, self.font_size)
break
else:
if style == 'BOLDITALIC':
self.fonts[style] = self.fonts['BOLD']
else:
self.fonts[style] = self.fonts['NORMAL']
def _get_mac_font_path(self, font_map, name, style):
return font_map.get((name + ' ' + style).strip().lower())
def _create_mac(self):
font_map = {}
for font_dir in (os.path.join(os.getenv("HOME"), 'Library/Fonts/'),
'/Library/Fonts/', '/System/Library/Fonts/'):
font_map.update(
(os.path.splitext(f)[0].lower(), os.path.join(font_dir, f))
for f in os.listdir(font_dir)
if f.lower().endswith(('ttf', 'ttc')))
for name in STYLES['NORMAL']:
path = self._get_mac_font_path(font_map, self.font_name, name)
if path is not None:
self.fonts['NORMAL'] = ImageFont.truetype(path, self.font_size)
break
else:
raise FontNotFound(f'No usable fonts named: "{self.font_name}"')
for style in ('ITALIC', 'BOLD', 'BOLDITALIC'):
for stylename in STYLES[style]:
path = self._get_mac_font_path(font_map, self.font_name, stylename)
if path is not None:
self.fonts[style] = ImageFont.truetype(path, self.font_size)
break
else:
if style == 'BOLDITALIC':
self.fonts[style] = self.fonts['BOLD']
else:
self.fonts[style] = self.fonts['NORMAL']
def _lookup_win(self, key, basename, styles, fail=False):
for suffix in ('', ' (TrueType)'):
for style in styles:
try:
valname = '{}{}{}'.format(basename, style and ' '+style, suffix)
val, _ = _winreg.QueryValueEx(key, valname)
return val
except OSError:
continue
else:
if fail:
raise FontNotFound(f'Font {basename} ({styles[0]}) not found in registry')
return None
def _create_win(self):
lookuperror = None
keynames = [ (_winreg.HKEY_CURRENT_USER, r'Software\Microsoft\Windows NT\CurrentVersion\Fonts'),
(_winreg.HKEY_CURRENT_USER, r'Software\Microsoft\Windows\CurrentVersion\Fonts'),
(_winreg.HKEY_LOCAL_MACHINE, r'Software\Microsoft\Windows NT\CurrentVersion\Fonts'),
(_winreg.HKEY_LOCAL_MACHINE, r'Software\Microsoft\Windows\CurrentVersion\Fonts') ]
for keyname in keynames:
try:
key = _winreg.OpenKey(*keyname)
try:
path = self._lookup_win(key, self.font_name, STYLES['NORMAL'], True)
self.fonts['NORMAL'] = ImageFont.truetype(path, self.font_size)
for style in ('ITALIC', 'BOLD', 'BOLDITALIC'):
path = self._lookup_win(key, self.font_name, STYLES[style])
if path:
self.fonts[style] = ImageFont.truetype(path, self.font_size)
else:
if style == 'BOLDITALIC':
self.fonts[style] = self.fonts['BOLD']
else:
self.fonts[style] = self.fonts['NORMAL']
return
except FontNotFound as err:
lookuperror = err
finally:
_winreg.CloseKey(key)
except OSError:
pass
else:
# If we get here, we checked all registry keys and had no luck
# We can be in one of two situations now:
# * All key lookups failed. In this case lookuperror is None and we
# will raise a generic error
# * At least one lookup failed with a FontNotFound error. In this
# case, we will raise that as a more specific error
if lookuperror:
raise lookuperror
raise FontNotFound('Can\'t open Windows font registry key')
def get_char_size(self):
"""
Get the character size.
"""
return self.get_text_size('M')
def get_text_size(self, text):
"""
Get the text size (width, height).
"""
font = self.fonts['NORMAL']
if hasattr(font, 'getbbox'): # Pillow >= 9.2.0
return font.getbbox(text)[2:4]
else:
return font.getsize(text)
def get_font(self, bold, oblique):
"""
Get the font based on bold and italic flags.
"""
if bold and oblique:
if self.variable:
return self.get_style('BOLDITALIC')
return self.fonts['BOLDITALIC']
elif bold:
if self.variable:
return self.get_style('BOLD')
return self.fonts['BOLD']
elif oblique:
if self.variable:
return self.get_style('ITALIC')
return self.fonts['ITALIC']
else:
if self.variable:
return self.get_style('NORMAL')
return self.fonts['NORMAL']
def get_style(self, style):
"""
Get the specified style of the font if it is a variable font.
If not found, return the normal font.
"""
font = self.fonts[style]
for style_name in STYLES[style]:
try:
font.set_variation_by_name(style_name)
return font
except ValueError:
pass
except OSError:
return font
return font
class ImageFormatter(Formatter):
"""
Create a PNG image from source code. This uses the Python Imaging Library to
generate a pixmap from the source code.
.. versionadded:: 0.10
Additional options accepted:
`image_format`
An image format to output to that is recognised by PIL, these include:
* "PNG" (default)
* "JPEG"
* "BMP"
* "GIF"
`line_pad`
The extra spacing (in pixels) between each line of text.
Default: 2
`font_name`
The font name to be used as the base font from which others, such as
bold and italic fonts will be generated. This really should be a
monospace font to look sane.
If a filename or a file-like object is specified, the user must
provide different styles of the font.
Default: "Courier New" on Windows, "Menlo" on Mac OS, and
"DejaVu Sans Mono" on \\*nix
`font_size`
The font size in points to be used.
Default: 14
`image_pad`
The padding, in pixels to be used at each edge of the resulting image.
Default: 10
`line_numbers`
Whether line numbers should be shown: True/False
Default: True
`line_number_start`
The line number of the first line.
Default: 1
`line_number_step`
The step used when printing line numbers.
Default: 1
`line_number_bg`
The background colour (in "#123456" format) of the line number bar, or
None to use the style background color.
Default: "#eed"
`line_number_fg`
The text color of the line numbers (in "#123456"-like format).
Default: "#886"
`line_number_chars`
The number of columns of line numbers allowable in the line number
margin.
Default: 2
`line_number_bold`
Whether line numbers will be bold: True/False
Default: False
`line_number_italic`
Whether line numbers will be italicized: True/False
Default: False
`line_number_separator`
Whether a line will be drawn between the line number area and the
source code area: True/False
Default: True
`line_number_pad`
The horizontal padding (in pixels) between the line number margin, and
the source code area.
Default: 6
`hl_lines`
Specify a list of lines to be highlighted.
.. versionadded:: 1.2
Default: empty list
`hl_color`
Specify the color for highlighting lines.
.. versionadded:: 1.2
Default: highlight color of the selected style
"""
# Required by the pygments mapper
name = 'img'
aliases = ['img', 'IMG', 'png']
filenames = ['*.png']
unicodeoutput = False
default_image_format = 'png'
def __init__(self, **options):
"""
See the class docstring for explanation of options.
"""
if not pil_available:
raise PilNotAvailable(
'Python Imaging Library is required for this formatter')
Formatter.__init__(self, **options)
self.encoding = 'latin1' # let pygments.format() do the right thing
# Read the style
self.styles = dict(self.style)
if self.style.background_color is None:
self.background_color = '#fff'
else:
self.background_color = self.style.background_color
# Image options
self.image_format = get_choice_opt(
options, 'image_format', ['png', 'jpeg', 'gif', 'bmp'],
self.default_image_format, normcase=True)
self.image_pad = get_int_opt(options, 'image_pad', 10)
self.line_pad = get_int_opt(options, 'line_pad', 2)
# The fonts
fontsize = get_int_opt(options, 'font_size', 14)
self.fonts = FontManager(options.get('font_name', ''), fontsize)
self.fontw, self.fonth = self.fonts.get_char_size()
# Line number options
self.line_number_fg = options.get('line_number_fg', '#886')
self.line_number_bg = options.get('line_number_bg', '#eed')
self.line_number_chars = get_int_opt(options,
'line_number_chars', 2)
self.line_number_bold = get_bool_opt(options,
'line_number_bold', False)
self.line_number_italic = get_bool_opt(options,
'line_number_italic', False)
self.line_number_pad = get_int_opt(options, 'line_number_pad', 6)
self.line_numbers = get_bool_opt(options, 'line_numbers', True)
self.line_number_separator = get_bool_opt(options,
'line_number_separator', True)
self.line_number_step = get_int_opt(options, 'line_number_step', 1)
self.line_number_start = get_int_opt(options, 'line_number_start', 1)
if self.line_numbers:
self.line_number_width = (self.fontw * self.line_number_chars +
self.line_number_pad * 2)
else:
self.line_number_width = 0
self.hl_lines = []
hl_lines_str = get_list_opt(options, 'hl_lines', [])
for line in hl_lines_str:
try:
self.hl_lines.append(int(line))
except ValueError:
pass
self.hl_color = options.get('hl_color',
self.style.highlight_color) or '#f90'
self.drawables = []
def get_style_defs(self, arg=''):
raise NotImplementedError('The -S option is meaningless for the image '
'formatter. Use -O style=<stylename> instead.')
def _get_line_height(self):
"""
Get the height of a line.
"""
return self.fonth + self.line_pad
def _get_line_y(self, lineno):
"""
Get the Y coordinate of a line number.
"""
return lineno * self._get_line_height() + self.image_pad
def _get_char_width(self):
"""
Get the width of a character.
"""
return self.fontw
def _get_char_x(self, linelength):
"""
Get the X coordinate of a character position.
"""
return linelength + self.image_pad + self.line_number_width
def _get_text_pos(self, linelength, lineno):
"""
Get the actual position for a character and line position.
"""
return self._get_char_x(linelength), self._get_line_y(lineno)
def _get_linenumber_pos(self, lineno):
"""
Get the actual position for the start of a line number.
"""
return (self.image_pad, self._get_line_y(lineno))
def _get_text_color(self, style):
"""
Get the correct color for the token from the style.
"""
if style['color'] is not None:
fill = '#' + style['color']
else:
fill = '#000'
return fill
def _get_text_bg_color(self, style):
"""
Get the correct background color for the token from the style.
"""
if style['bgcolor'] is not None:
bg_color = '#' + style['bgcolor']
else:
bg_color = None
return bg_color
def _get_style_font(self, style):
"""
Get the correct font for the style.
"""
return self.fonts.get_font(style['bold'], style['italic'])
def _get_image_size(self, maxlinelength, maxlineno):
"""
Get the required image size.
"""
return (self._get_char_x(maxlinelength) + self.image_pad,
self._get_line_y(maxlineno + 0) + self.image_pad)
def _draw_linenumber(self, posno, lineno):
"""
Remember a line number drawable to paint later.
"""
self._draw_text(
self._get_linenumber_pos(posno),
str(lineno).rjust(self.line_number_chars),
font=self.fonts.get_font(self.line_number_bold,
self.line_number_italic),
text_fg=self.line_number_fg,
text_bg=None,
)
def _draw_text(self, pos, text, font, text_fg, text_bg):
"""
Remember a single drawable tuple to paint later.
"""
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'
|