# Copyright 2010-2011 Florent Le Coz # # This file is part of Poezio. # # Poezio is free software: you can redistribute it and/or modify # it under the terms of the zlib license. See the COPYING file. """ Various methods to convert shell colors to poezio colors, xhtml code to shell colors, poezio colors to xhtml code """ import base64 import curses import hashlib import re from os import path from slixmpp.xmlstream import ET from urllib.parse import unquote from io import BytesIO from xml import sax from xml.sax import saxutils digits = '0123456789' # never trust the modules XHTML_NS = 'http://www.w3.org/1999/xhtml' # HTML named colors colors = { 'aliceblue': 231, 'antiquewhite': 231, 'aqua': 51, 'aquamarine': 122, 'azure': 231, 'beige': 231, 'bisque': 230, 'black': 232, 'blanchedalmond': 230, 'blue': 21, 'blueviolet': 135, 'brown': 124, 'burlywood': 223, 'cadetblue': 109, 'chartreuse': 118, 'chocolate': 172, 'coral': 209, 'cornflowerblue': 111, 'cornsilk': 231, 'crimson': 197, 'cyan': 51, 'darkblue': 19, 'darkcyan': 37, 'darkgoldenrod': 178, 'darkgray': 247, 'darkgreen': 28, 'darkgrey': 247, 'darkkhaki': 186, 'darkmagenta': 127, 'darkolivegreen': 65, 'darkorange': 214, 'darkorchid': 134, 'darkred': 124, 'darksalmon': 216, 'darkseagreen': 151, 'darkslateblue': 61, 'darkslategray': 59, 'darkslategrey': 59, 'darkturquoise': 44, 'darkviolet': 128, 'deeppink': 199, 'deepskyblue': 45, 'dimgray': 241, 'dimgrey': 241, 'dodgerblue': 39, 'firebrick': 160, 'floralwhite': 231, 'forestgreen': 34, 'fuchsia': 201, 'gainsboro': 252, 'ghostwhite': 231, 'gold': 226, 'goldenrod': 214, 'gray': 244, 'green': 34, 'greenyellow': 191, 'grey': 244, 'honeydew': 231, 'hotpink': 212, 'indianred': 174, 'indigo': 55, 'ivory': 231, 'khaki': 229, 'lavender': 231, 'lavenderblush': 231, 'lawngreen': 118, 'lemonchiffon': 230, 'lightblue': 195, 'lightcoral': 217, 'lightcyan': 231, 'lightgoldenrodyellow': 230, 'lightgray': 251, 'lightgreen': 157, 'lightgrey': 251, 'lightpink': 224, 'lightsalmon': 216, 'lightseagreen': 43, 'lightskyblue': 153, 'lightslategray': 109, 'lightslategrey': 109, 'lightsteelblue': 189, 'lightyellow': 231, 'lime': 46, 'limegreen': 77, 'linen': 231, 'magenta': 201, 'maroon': 124, 'mediumaquamarine': 115, 'mediumblue': 20, 'mediumorchid': 170, 'mediumpurple': 141, 'mediumseagreen': 78, 'mediumslateblue': 105, 'mediumspringgreen': 49, 'mediumturquoise': 80, 'mediumvioletred': 163, 'midnightblue': 18, 'mintcream': 231, 'mistyrose': 231, 'moccasin': 230, 'navajowhite': 230, 'navy': 19, 'oldlace': 231, 'olive': 142, 'olivedrab': 106, 'orange': 214, 'orangered': 202, 'orchid': 213, 'palegoldenrod': 229, 'palegreen': 157, 'paleturquoise': 195, 'palevioletred': 211, 'papayawhip': 231, 'peachpuff': 230, 'peru': 179, 'pink': 224, 'plum': 219, 'powderblue': 195, 'purple': 127, 'red': 196, 'rosybrown': 181, 'royalblue': 69, 'saddlebrown': 130, 'salmon': 216, 'sandybrown': 216, 'seagreen': 72, 'seashell': 231, 'sienna': 131, 'silver': 250, 'skyblue': 153, 'slateblue': 104, 'slategray': 109, 'slategrey': 109, 'snow': 231, 'springgreen': 48, 'steelblue': 74, 'tan': 187, 'teal': 37, 'thistle': 225, 'tomato': 209, 'turquoise': 86, 'violet': 219, 'wheat': 230, 'white': 255, 'whitesmoke': 255, 'yellow': 226, 'yellowgreen': 149 } whitespace_re = re.compile(r'\s+') xhtml_attr_re = re.compile(r'\x19-?\d[^}]*}|\x19[buaio]') xhtml_data_re = re.compile(r'data:image/([a-z]+);base64,(.+)') poezio_color_double = re.compile(r'(?:\x19\d+}|\x19\d)+(\x19\d|\x19\d+})') poezio_format_trim = re.compile(r'(\x19\d+}|\x19\d|\x19[buaio]|\x19o)+\x19o') xhtml_simple_attr_re = re.compile(r'\x19\d') def get_body_from_message_stanza(message, use_xhtml=False, tmp_dir=None, extract_images=False): """ Returns a string with xhtml markups converted to poezio colors if there's an xhtml_im element, or the body (without any color) otherwise """ if use_xhtml: xhtml = message['html'].xml xhtml_body = xhtml.find('{http://www.w3.org/1999/xhtml}body') if xhtml_body: content = xhtml_to_poezio_colors(xhtml_body, tmp_dir=tmp_dir, extract_images=extract_images) content = content if content else message['body'] return content or " " return message['body'] def ncurses_color_to_html(color): """ Takes an int between 0 and 256 and returns a string of the form #XXXXXX representing an html color. """ if color <= 15: try: (r, g, b) = curses.color_content(color) except: # fallback in faulty terminals (e.g. xterm) (r, g, b) = curses.color_content(color%8) r = r / 1000 * 6 - 0.01 g = g / 1000 * 6 - 0.01 b = b / 1000 * 6 - 0.01 elif color <= 231: color = color - 16 r = color % 6 color = color / 6 g = color % 6 color = color / 6 b = color % 6 else: color -= 232 r = g = b = color / 24 * 6 return '#%02X%02X%02X' % (r*256/6, g*256/6, b*256/6) def parse_css(css): def get_color(value): if value[0] == '#': value = value[1:] length = len(value) if length != 3 and length != 6: return -1 value = int(value, 16) if length == 6: r = int(value >> 16) g = int((value >> 8) & 0xff) b = int(value & 0xff) if r == g == b: return 232 + int(r/10.6251) div = 42.51 else: r = int(value >> 8) g = int((value >> 4) & 0xf) b = int(value & 0xf) if r == g == b: return 232 + int(1.54*r) div = 2.51 return 6*6*int(r/div) + 6*int(g/div) + int(b/div) + 16 if value in colors: return colors[value] return -1 shell = '' rules = css.split(';') for rule in rules: if ':' not in rule: continue key, value = rule.split(':', 1) key = key.strip() value = value.strip() if key == 'background-color': pass#shell += '\x191' elif key == 'color': color = get_color(value) if color != -1: shell += '\x19%d}' % color elif key == 'font-style': shell += '\x19i' elif key == 'font-weight': shell += '\x19b' elif key == 'margin-left': shell += ' ' elif key == 'text-align': pass elif key == 'text-decoration': if value == 'underline': shell += '\x19u' elif value == 'blink': shell += '\x19a' return shell def trim(string): return re.sub(whitespace_re, ' ', string) class XHTMLHandler(sax.ContentHandler): def __init__(self, force_ns=False, tmp_dir=None, extract_images=False): self.builder = [] self.formatting = [] self.attrs = [] self.list_state = [] self.is_pre = False self.a_start = 0 # do not care about xhtml-in namespace self.force_ns = force_ns self.tmp_dir = tmp_dir self.extract_images = extract_images @property def result(self): sanitized = re.sub(poezio_color_double, r'\1', ''.join(self.builder).strip()) return re.sub(poezio_format_trim, '\x19o', sanitized) def append_formatting(self, formatting): self.formatting.append(formatting) self.builder.append(formatting) def pop_formatting(self): self.formatting.pop() self.builder.append('\x19o' + ''.join(self.formatting)) def characters(self, characters): self.builder.append(characters if self.is_pre else trim(characters)) def startElementNS(self, name, _, attrs): if name[0] != XHTML_NS and not self.force_ns: return builder = self.builder attrs = {name: value for ((ns, name), value) in attrs.items() if ns is None} self.attrs.append(attrs) if 'style' in attrs: style = parse_css(attrs['style']) self.append_formatting(style) name = name[1] if name == 'a': self.append_formatting('\x19u') self.a_start = len(self.builder) elif name == 'blockquote': builder.append('ā€œ') elif name == 'br': builder.append('\n') elif name == 'cite': self.append_formatting('\x19u') elif name == 'em': self.append_formatting('\x19i') elif name == 'img': if re.match(xhtml_data_re, attrs['src']) and self.extract_images: type_, data = [i for i in re.split(xhtml_data_re, attrs['src']) if i] bin_data = base64.b64decode(unquote(data)) filename = hashlib.sha1(bin_data).hexdigest() + '.' + type_ filepath = path.join(self.tmp_dir, filename) if not path.exists(filepath): try: with open(filepath, 'wb') as fd: fd.write(bin_data) builder.append('file://%s' % filepath) except Exception as e: builder.append('[Error while saving image: %s]' % e) else: builder.append('file://%s' % filepath) else: builder.append(trim(attrs['src'])) if 'alt' in attrs: builder.append(' (%s)' % trim(attrs['alt'])) elif name == 'ul': self.list_state.append('ul') elif name == 'ol': self.list_state.append(1) elif name == 'li': try: state = self.list_state[-1] except IndexError: state = 'ul' if state == 'ul': builder.append('\nā€¢ ') else: builder.append('\n%d) ' % state) state += 1 self.list_state[-1] = state elif name == 'p': builder.append('\n') elif name == 'pre': builder.append('\n') self.is_pre = True elif name == 'strong': self.append_formatting('\x19b') def endElementNS(self, name, _): if name[0] != XHTML_NS and not self.force_ns: return builder = self.builder attrs = self.attrs.pop() name = name[1] if name == 'a': self.pop_formatting() # do not display the link twice text_elements = filter(lambda x: not x.startswith('\x19'), self.builder[self.a_start:]) link_text = ''.join(text_elements).strip() if 'href' in attrs and attrs['href'] != link_text: builder.append(' (%s)' % trim(attrs['href'])) elif name == 'blockquote': builder.append('ā€') elif name in ('cite', 'em', 'strong'): self.pop_formatting() elif name in ('ol', 'p', 'ul'): builder.append('\n') elif name == 'pre': builder.append('\n') self.is_pre = False if 'style' in attrs: self.pop_formatting() if 'title' in attrs: builder.append(' [' + attrs['title'] + ']') def xhtml_to_poezio_colors(xml, force=False, tmp_dir=None, extract_images=None): if isinstance(xml, str): xml = xml.encode('utf8') elif not isinstance(xml, bytes): xml = ET.tostring(xml) handler = XHTMLHandler(force_ns=force, tmp_dir=tmp_dir, extract_images=extract_images) parser = sax.make_parser() parser.setFeature(sax.handler.feature_namespaces, True) parser.setContentHandler(handler) parser.parse(BytesIO(xml)) return handler.result def clean_text(s): """ Remove all xhtml-im attributes (\x19etc) from the string with the complete color format, i.e \x19xxx} """ s = re.sub(xhtml_attr_re, "", s) return s def clean_text_simple(string): """ Remove all \x19 from the string formatted with simple colors: \x198 """ pos = string.find('\x19') while pos != -1: string = string[:pos] + string[pos+2:] pos = string.find('\x19') return string def convert_simple_to_full_colors(text): """ takes a \x19n formatted string and returns a \x19n} formatted one. """ # TODO, have a single list of this. This is some sort of # dusplicate from windows.format_chars mapping = str.maketrans({'\x0E': '\x19b', '\x0F': '\x19o', '\x10': '\x19u', '\x11': '\x191', '\x12': '\x192', '\x13': '\x193', '\x14': '\x194', '\x15': '\x195', '\x16': '\x196', '\x17': '\x197', '\x18': '\x198', '\x19': '\x199'}) text = text.translate(mapping) def add_curly_bracket(match): return match.group(0) + '}' return re.sub(xhtml_simple_attr_re, add_curly_bracket, text) number_to_color_names = { 1: 'red', 2: 'green', 3: 'yellow', 4: 'blue', 5: 'violet', 6: 'turquoise', 7: 'white' } def format_inline_css(_dict): return ''.join(('%s: %s;' % (key, value) for key, value in _dict.items())) def poezio_colors_to_html(string): """ Convert poezio colors to html (e.g. \x191}: ) """ # Maintain a list of the current css attributes used # And check if a tag is open (by design, we only open # spans tag, and they cannot be nested. current_attrs = {} tag_open = False next_attr_char = string.find('\x19') build = ["

"] def check_property(key, value): nonlocal tag_open if current_attrs.get(key, None) == value: return current_attrs[key] = value if tag_open: tag_open = False build.append('') while next_attr_char != -1: attr_char = string[next_attr_char+1].lower() if next_attr_char != 0 and string[:next_attr_char]: if current_attrs and not tag_open: build.append('' % format_inline_css(current_attrs)) tag_open = True build.append(saxutils.escape(string[:next_attr_char])) if attr_char == 'o': if tag_open: build.append('') tag_open = False current_attrs = {} elif attr_char == 'b': check_property('font-weight', 'bold') elif attr_char == 'u': check_property('text-decoration', 'underline') if attr_char in digits: number_str = string[next_attr_char+1:string.find('}', next_attr_char)] number = int(number_str) if number in number_to_color_names: check_property('color', number_to_color_names.get(number, 'black')) else: check_property('color', ncurses_color_to_html(number)) string = string[next_attr_char+len(number_str)+2:] else: string = string[next_attr_char+2:] next_attr_char = string.find('\x19') if current_attrs and not tag_open and string: build.append('' % format_inline_css(current_attrs)) tag_open = True build.append(saxutils.escape(string)) if tag_open: build.append('') build.append("

") text = ''.join(build) return text.replace('\n', '
')