554 lines
18 KiB
Python
554 lines
18 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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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 2006-2013 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 sys
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from pygments.formatter import Formatter
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from pygments.util import get_bool_opt, get_int_opt, \
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get_list_opt, get_choice_opt
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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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_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 = 'Bitstream Vera Sans Mono'
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DEFAULT_FONT_NAME_WIN = 'Courier New'
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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(object):
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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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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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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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from commands import getstatusoutput
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exit, out = getstatusoutput('fc-list "%s:style=%s" file' %
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(name, style))
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if not exit:
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lines = out.splitlines()
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if lines:
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path = lines[0].strip().strip(':')
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return path
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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('No usable fonts named: "%s"' %
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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 _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 = '%s%s%s' % (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 EnvironmentError:
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continue
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else:
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if fail:
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raise FontNotFound('Font %s (%s) not found in registry' %
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(basename, styles[0]))
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return None
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def _create_win(self):
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try:
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key = _winreg.OpenKey(
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_winreg.HKEY_LOCAL_MACHINE,
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r'Software\Microsoft\Windows NT\CurrentVersion\Fonts')
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except EnvironmentError:
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try:
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key = _winreg.OpenKey(
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_winreg.HKEY_LOCAL_MACHINE,
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r'Software\Microsoft\Windows\CurrentVersion\Fonts')
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except EnvironmentError:
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raise FontNotFound('Can\'t open Windows font registry key')
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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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finally:
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_winreg.CloseKey(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.fonts['NORMAL'].getsize('M')
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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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return self.fonts['BOLDITALIC']
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elif bold:
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return self.fonts['BOLD']
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elif oblique:
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return self.fonts['ITALIC']
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else:
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return self.fonts['NORMAL']
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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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*New in Pygments 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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Default: "Bitstream Vera Sans Mono"
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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. *New in Pygments 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. *New in Pygments 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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# 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, charno):
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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 charno * self.fontw + self.image_pad + self.line_number_width
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def _get_text_pos(self, charno, 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(charno), 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_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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def _get_image_size(self, maxcharno, 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(maxcharno) + 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),
|
||
|
|
fill=self.line_number_fg,
|
||
|
|
)
|
||
|
|
|
||
|
|
def _draw_text(self, pos, text, font, **kw):
|
||
|
|
"""
|
||
|
|
Remember a single drawable tuple to paint later.
|
||
|
|
"""
|
||
|
|
self.drawables.append((pos, text, font, kw))
|
||
|
|
|
||
|
|
def _create_drawables(self, tokensource):
|
||
|
|
"""
|
||
|
|
Create drawables for the token content.
|
||
|
|
"""
|
||
|
|
lineno = charno = maxcharno = 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(charno, lineno),
|
||
|
|
temp,
|
||
|
|
font = self._get_style_font(style),
|
||
|
|
fill = self._get_text_color(style)
|
||
|
|
)
|
||
|
|
charno += len(temp)
|
||
|
|
maxcharno = max(maxcharno, charno)
|
||
|
|
if line.endswith('\n'):
|
||
|
|
# add a line for each extra line in the value
|
||
|
|
charno = 0
|
||
|
|
lineno += 1
|
||
|
|
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 xrange(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)
|
||
|
|
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.maxcharno, 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, kw in self.drawables:
|
||
|
|
draw.text(pos, value, font=font, **kw)
|
||
|
|
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.
|
||
|
|
|
||
|
|
*New in Pygments 1.0.* (You could create GIF images before by passing a
|
||
|
|
suitable `image_format` option to the `ImageFormatter`.)
|
||
|
|
"""
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
*New in Pygments 1.0.* (You could create JPEG images before by passing a
|
||
|
|
suitable `image_format` option to the `ImageFormatter`.)
|
||
|
|
"""
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
*New in Pygments 1.0.* (You could create bitmap images before by passing a
|
||
|
|
suitable `image_format` option to the `ImageFormatter`.)
|
||
|
|
"""
|
||
|
|
|
||
|
|
name = 'img_bmp'
|
||
|
|
aliases = ['bmp', 'bitmap']
|
||
|
|
filenames = ['*.bmp']
|
||
|
|
default_image_format = 'bmp'
|