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Editing: img.py
""" pygments.formatters.img ~~~~~~~~~~~~~~~~~~~~~~~ Formatter for Pixmap output. :copyright: Copyright 2006-2023 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 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', "%s:style=%s" % (name, 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('No usable fonts named: "%s"' % 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('No usable fonts named: "%s"' % 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 = '%s%s%s' % (basename, style and ' '+style, suffix) val, _ = _winreg.QueryValueEx(key, valname) return val except OSError: continue else: if fail: raise FontNotFound('Font %s (%s) not found in registry' % (basename, styles[0])) 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: return self.fonts['BOLDITALIC'] elif bold: return self.fonts['BOLD'] elif oblique: return self.fonts['ITALIC'] else: return self.fonts['NORMAL'] 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. 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: text_size = draw.textsize(text=value, font=font) 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'
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