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comparison: ProjectWeb/Html5ToCss3Converter.py
ProjectWeb/Html5ToCss3Converter.py
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| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2014 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing the HTML5 to CSS3 converter. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 import os | |
| 13 import datetime | |
| 14 import getpass | |
| 15 import random | |
| 16 | |
| 17 from PyQt5.QtCore import QObject | |
| 18 from PyQt5.QtWidgets import QDialog | |
| 19 | |
| 20 from .Html5ToCss3ConverterParameterDialog import \ | |
| 21 Html5ToCss3ConverterParameterDialog | |
| 22 | |
| 23 | |
| 24 class Html5ToCss3Converter(QObject): | |
| 25 """ | |
| 26 Class implementing the HTML5 to CSS3 converter. | |
| 27 """ | |
| 28 CssTemplate7 = "{0}{1}{2}{3}{4}{5}{6}" | |
| 29 CssTemplate8 = "{0}{1}{2}{3}{4}{5}{6}{7}" | |
| 30 Placeholders = ('margin:0', 'padding:0', 'border:0', 'font-size:100%', | |
| 31 'font:inherit', 'vertical-align:baseline', 'line-height:1', | |
| 32 'outline:0', 'font-weight:inherit', 'font-style:inherit', | |
| 33 'font-family:inherit', 'vertical-align:baseline') | |
| 34 CssToIgnore = ('head', 'meta', 'noscript', 'script', 'style', 'link', | |
| 35 'no-js', 'title', 'object', 'col', 'colgroup', 'option', | |
| 36 'param', 'audio', 'basefont', 'isindex', 'svg', 'area', | |
| 37 'embed', 'br') | |
| 38 | |
| 39 def __init__(self, html, parent=None): | |
| 40 """ | |
| 41 Constructor | |
| 42 | |
| 43 @param html HTML text to be converted (string) | |
| 44 @param parent reference to the parent object (QObject) | |
| 45 """ | |
| 46 super(Html5ToCss3Converter, self).__init__(parent) | |
| 47 | |
| 48 self.__html = html | |
| 49 | |
| 50 def getCss3(self): | |
| 51 """ | |
| 52 Public method to get the converted CSS3 text. | |
| 53 | |
| 54 @return CSS3 text (string) | |
| 55 """ | |
| 56 dlg = Html5ToCss3ConverterParameterDialog() | |
| 57 if dlg.exec_() == QDialog.Accepted: | |
| 58 indentation, placeholders = dlg.getData() | |
| 59 | |
| 60 # TODO: implement this | |
| 61 self.__createSoup() | |
| 62 | |
| 63 alreadyDone = list(self.CssToIgnore) | |
| 64 | |
| 65 css = '@charset "utf-8";{0}'.format(os.linesep) | |
| 66 css += "/* {0} by {1}*/{2}".format( | |
| 67 datetime.datetime.now().isoformat().split(".")[0], | |
| 68 getpass.getuser(), | |
| 69 2 * os.linesep | |
| 70 ) | |
| 71 | |
| 72 # step 1: tags | |
| 73 for tag in self.__getTags(): | |
| 74 if tag not in alreadyDone: | |
| 75 css += self.CssTemplate7.format( | |
| 76 tag, | |
| 77 "{", | |
| 78 os.linesep, | |
| 79 indentation, | |
| 80 random.choice(self.Placeholders) + os.linesep | |
| 81 if placeholders else os.linesep, | |
| 82 "}", | |
| 83 os.linesep | |
| 84 ) | |
| 85 alreadyDone.append(tag) | |
| 86 css += "/*{0}*/{1}".format( | |
| 87 "-" * 75, | |
| 88 os.linesep | |
| 89 ) | |
| 90 | |
| 91 # step 2: IDs | |
| 92 for id_ in self.__getIds(): | |
| 93 if id_ not in alreadyDone: | |
| 94 css += "/* {0} */{1}".format( | |
| 95 "_".join(id_).lower(), | |
| 96 os.linesep | |
| 97 ) | |
| 98 css += self.CssTemplate8.format( | |
| 99 "#", | |
| 100 id_[1], | |
| 101 "{", | |
| 102 os.linesep, | |
| 103 indentation, | |
| 104 random.choice(self.Placeholders) + os.linesep | |
| 105 if placeholders else os.linesep, | |
| 106 "}", | |
| 107 os.linesep | |
| 108 ) | |
| 109 alreadyDone.append(id_) | |
| 110 css += "/*{0}*/{1}".format( | |
| 111 "-" * 75, | |
| 112 os.linesep | |
| 113 ) | |
| 114 | |
| 115 # step 3: classes | |
| 116 for class_ in self.__getClasses(): | |
| 117 if class_ not in alreadyDone: | |
| 118 css += "/* {0} */{1}".format( | |
| 119 "_".join(class_).lower(), | |
| 120 os.linesep | |
| 121 ) | |
| 122 css += self.CssTemplate8.format( | |
| 123 ".", | |
| 124 ", .".join(class_[1].split()), | |
| 125 "{", | |
| 126 os.linesep, | |
| 127 indentation, | |
| 128 random.choice(self.Placeholders) + os.linesep | |
| 129 if placeholders else os.linesep, | |
| 130 "}", | |
| 131 os.linesep | |
| 132 ) | |
| 133 alreadyDone.append(class_) | |
| 134 else: | |
| 135 css = "" | |
| 136 return css.strip() | |
| 137 | |
| 138 def __createSoup(self): | |
| 139 """ | |
| 140 Private method to get a BeaitifulSoup object with our HTML text. | |
| 141 """ | |
| 142 from bs4 import BeautifulSoup | |
| 143 self.__soup = BeautifulSoup(BeautifulSoup(self.__html).prettify()) | |
| 144 | |
| 145 def __getTags(self): | |
| 146 """ | |
| 147 Private method to extract all tags of the HTML text. | |
| 148 | |
| 149 @return list of all tags (list of strings) | |
| 150 """ | |
| 151 tags = [t.name for t in self.__soup.find_all(True)] | |
| 152 return list(set(tags)) | |
| 153 | |
| 154 def __getClasses(self): | |
| 155 """ | |
| 156 Private method to extract all classes of the HTML text. | |
| 157 | |
| 158 @return list of tuples containing the tag name and its classes | |
| 159 as a blank separated string (list of tuples of two strings) | |
| 160 """ | |
| 161 classes = [(t.name, " ".join(t["class"])) for t in | |
| 162 self.__soup.find_all(True, {"class": True})] | |
| 163 return sorted(list(set(classes))) | |
| 164 | |
| 165 def __getIds(self): | |
| 166 """ | |
| 167 Private method to extract all IDs of the HTML text. | |
| 168 | |
| 169 @return list of tuples containing the tag name and its ID | |
| 170 (list of tuples of two strings) | |
| 171 """ | |
| 172 ids = [(t.name, t["id"]) for t in | |
| 173 self.__soup.find_all(True, {"id": True})] | |
| 174 return sorted(list(set(ids))) |
