Wed, 01 Jan 2014 14:40:41 +0100
Updated copyright for 2014.
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1 | # -*- coding: utf-8 -*- |
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2 | |
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3 | # Copyright (c) 2012 - 2014 Detlev Offenbach <detlev@die-offenbachs.de> |
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4 | # |
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5 | |
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6 | """ |
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7 | Module implementing a network reply class for directory resources. |
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8 | """ |
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9 | |
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10 | from PyQt4.QtCore import Qt, QByteArray, QTimer, QDir, QIODevice, QUrl, QBuffer |
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11 | from PyQt4.QtGui import QPixmap |
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12 | from PyQt4.QtNetwork import QNetworkReply, QNetworkRequest |
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13 | from PyQt4.QtWebKit import QWebSettings |
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14 | |
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15 | import UI.PixmapCache |
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16 | |
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17 | import Utilities |
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18 | |
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19 | |
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20 | dirListPage_html = """\ |
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21 | <?xml version="1.0" encoding="UTF-8" ?> |
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22 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" |
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23 | "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> |
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24 | <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> |
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25 | <head> |
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26 | <title>{0}</title> |
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27 | <style type="text/css"> |
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28 | body {{ |
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29 | padding: 3em 0em; |
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30 | background: -webkit-gradient(linear, left top, left bottom, from(#85784A), to(#FDFDFD), color-stop(0.5, #FDFDFD)); |
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31 | background-repeat: repeat-x; |
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32 | }} |
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33 | #box {{ |
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34 | background: white; |
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35 | border: 1px solid #85784A; |
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36 | width: 80%; |
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37 | padding: 30px; |
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38 | margin: auto; |
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39 | -webkit-border-radius: 0.8em; |
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40 | }} |
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41 | h1 {{ |
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42 | font-size: 130%; |
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43 | font-weight: bold; |
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44 | border-bottom: 1px solid #85784A; |
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45 | }} |
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46 | th {{ |
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47 | background-color: #B8B096; |
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48 | color: black; |
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49 | }} |
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50 | table {{ |
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51 | border: solid 1px #85784A; |
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52 | margin: 5px 0; |
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53 | width: 100%; |
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54 | }} |
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55 | tr.odd {{ |
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56 | background-color: white; |
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57 | color: black; |
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58 | }} |
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59 | tr.even {{ |
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60 | background-color: #CEC9B8; |
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61 | color: black; |
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62 | }} |
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63 | .modified {{ |
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64 | text-align: left; |
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65 | vertical-align: top; |
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66 | white-space: nowrap; |
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67 | }} |
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68 | .size {{ |
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69 | text-align: right; |
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70 | vertical-align: top; |
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71 | white-space: nowrap; |
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72 | padding-right: 22px; |
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73 | }} |
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74 | .name {{ |
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75 | text-align: left; |
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76 | vertical-align: top; |
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77 | white-space: pre-wrap; |
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78 | width: 100% |
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79 | }} |
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80 | {1} |
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81 | </style> |
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82 | </head> |
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83 | <body> |
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84 | <div id="box"> |
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85 | <h1>{2}</h1> |
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86 | {3} |
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87 | <table align="center" cellspacing="0" width="90%"> |
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88 | {4} |
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89 | </table> |
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90 | </div> |
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91 | </body> |
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92 | </html> |
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93 | """ |
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94 | |
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95 | |
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96 | class FileReply(QNetworkReply): |
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97 | """ |
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98 | Class implementing a network reply for directory resources. |
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99 | """ |
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100 | def __init__(self, url, parent=None): |
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101 | """ |
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102 | Constructor |
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103 | |
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104 | @param url requested FTP URL (QUrl) |
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105 | @param parent reference to the parent object (QObject) |
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106 | """ |
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107 | super().__init__(parent) |
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108 | |
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109 | self.__content = QByteArray() |
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110 | self.__units = ["Bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"] |
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111 | |
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112 | if url.path() == "": |
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113 | url.setPath("/") |
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114 | self.setUrl(url) |
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115 | |
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116 | QTimer.singleShot(0, self.__loadDirectory) |
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117 | |
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118 | def abort(self): |
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119 | """ |
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120 | Public slot to abort the operation. |
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121 | """ |
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122 | # do nothing |
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123 | pass |
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124 | |
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125 | def bytesAvailable(self): |
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126 | """ |
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127 | Public method to determined the bytes available for being read. |
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128 | |
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129 | @return bytes available (integer) |
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130 | """ |
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131 | return self.__content.size() |
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132 | |
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133 | def isSequential(self): |
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134 | """ |
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135 | Public method to check for sequential access. |
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136 | |
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137 | @return flag indicating sequential access (boolean) |
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138 | """ |
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139 | return True |
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140 | |
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141 | def readData(self, maxlen): |
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142 | """ |
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143 | Protected method to retrieve data from the reply object. |
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144 | |
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145 | @param maxlen maximum number of bytes to read (integer) |
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146 | @return string containing the data (bytes) |
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147 | """ |
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148 | if self.__content.size(): |
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149 | len_ = min(maxlen, self.__content.size()) |
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150 | buffer = bytes(self.__content[:len_]) |
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151 | self.__content.remove(0, len_) |
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152 | return buffer |
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153 | |
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154 | def __cssLinkClass(self, icon, size=32): |
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155 | """ |
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156 | Private method to generate a link class with an icon. |
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157 | |
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158 | @param icon icon to be included (QIcon) |
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159 | @param size size of the icon to be generated (integer) |
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160 | @return CSS class string (string) |
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161 | """ |
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162 | cssString = \ |
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163 | """a.{{0}} {{{{\n"""\ |
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164 | """ padding-left: {0}px;\n"""\ |
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165 | """ background: transparent url(data:image/png;base64,{1}) no-repeat center left;\n"""\ |
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166 | """ font-weight: bold;\n"""\ |
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167 | """}}}}\n""" |
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168 | pixmap = icon.pixmap(size, size) |
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169 | imageBuffer = QBuffer() |
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170 | imageBuffer.open(QIODevice.ReadWrite) |
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171 | if not pixmap.save(imageBuffer, "PNG"): |
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172 | # write a blank pixmap on error |
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173 | pixmap = QPixmap(size, size) |
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174 | pixmap.fill(Qt.transparent) |
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175 | imageBuffer.buffer().clear() |
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176 | pixmap.save(imageBuffer, "PNG") |
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177 | return cssString.format(size + 4, |
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178 | str(imageBuffer.buffer().toBase64(), encoding="ascii")) |
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179 | |
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180 | def __loadDirectory(self): |
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181 | """ |
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182 | Private slot loading the directory and preparing the listing page. |
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183 | """ |
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184 | dir = QDir(self.url().toLocalFile()) |
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185 | dirItems = dir.entryInfoList(QDir.AllEntries | QDir.Hidden | QDir.NoDotAndDotDot, |
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186 | QDir.Name | QDir.DirsFirst) |
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187 | |
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188 | u = self.url() |
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189 | if not u.path().endswith("/"): |
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190 | u.setPath(u.path() + "/") |
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191 | |
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192 | baseUrl = self.url().toString() |
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193 | basePath = u.path() |
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194 | |
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195 | linkClasses = {} |
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196 | iconSize = QWebSettings.globalSettings().fontSize(QWebSettings.DefaultFontSize) |
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197 | |
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198 | parent = u.resolved(QUrl("..")) |
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199 | if parent.isParentOf(u): |
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200 | icon = UI.PixmapCache.getIcon("up.png") |
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201 | linkClasses["link_parent"] = \ |
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202 | self.__cssLinkClass(icon, iconSize).format("link_parent") |
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203 | parentStr = self.trUtf8( |
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204 | """ <p><a class="link_parent" href="{0}">""" |
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205 | """Change to parent directory</a></p>""" |
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206 | ).format(parent.toString()) |
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207 | else: |
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208 | parentStr = "" |
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209 | |
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210 | row = \ |
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211 | """ <tr class="{0}">"""\ |
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212 | """<td class="name"><a class="{1}" href="{2}">{3}</a></td>"""\ |
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213 | """<td class="size">{4}</td>"""\ |
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214 | """<td class="modified">{5}</td>"""\ |
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215 | """</tr>\n""" |
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216 | table = self.trUtf8( |
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217 | """ <tr>""" |
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218 | """<th align="left">Name</th>""" |
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219 | """<th>Size</th>""" |
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220 | """<th align="left">Last modified</th>""" |
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221 | """</tr>\n""" |
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222 | ) |
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223 | |
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224 | i = 0 |
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225 | for item in dirItems: |
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226 | name = item.fileName() |
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227 | if item.isDir() and not name.endswith("/"): |
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228 | name += "/" |
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229 | child = u.resolved(QUrl(name.replace(":", "%3A"))) |
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230 | |
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231 | if item.isFile(): |
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232 | size = item.size() |
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233 | unit = 0 |
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234 | while size: |
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235 | newSize = size // 1024 |
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236 | if newSize and unit < len(self.__units): |
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237 | size = newSize |
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238 | unit += 1 |
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239 | else: |
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240 | break |
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241 | |
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242 | sizeStr = self.trUtf8("{0} {1}", "size unit")\ |
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243 | .format(size, self.__units[unit]) |
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244 | linkClass = "link_file" |
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245 | if linkClass not in linkClasses: |
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246 | icon = UI.PixmapCache.getIcon("fileMisc.png") |
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247 | linkClasses[linkClass] = \ |
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248 | self.__cssLinkClass(icon, iconSize).format(linkClass) |
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249 | else: |
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250 | sizeStr = "" |
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251 | linkClass = "link_dir" |
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252 | if linkClass not in linkClasses: |
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253 | icon = UI.PixmapCache.getIcon("dirClosed.png") |
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254 | linkClasses[linkClass] = \ |
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255 | self.__cssLinkClass(icon, iconSize).format(linkClass) |
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256 | table += row.format( |
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257 | i == 0 and "odd" or "even", |
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258 | linkClass, |
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259 | child.toString(), |
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260 | Utilities.html_encode(item.fileName()), |
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261 | sizeStr, |
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262 | item.lastModified().toString("yyyy-MM-dd hh:mm"), |
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263 | ) |
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264 | i = 1 - i |
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265 | |
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266 | content = dirListPage_html.format( |
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267 | Utilities.html_encode(baseUrl), |
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268 | "".join(linkClasses.values()), |
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269 | self.trUtf8("Listing of {0}").format(basePath), |
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270 | parentStr, |
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271 | table |
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272 | ) |
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273 | self.__content = QByteArray(content.encode("utf8")) |
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274 | self.__content.append(512 * b' ') |
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275 | |
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276 | self.open(QIODevice.ReadOnly | QIODevice.Unbuffered) |
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277 | self.setHeader(QNetworkRequest.ContentTypeHeader, "text/html; charset=UTF-8") |
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278 | self.setHeader(QNetworkRequest.ContentLengthHeader, self.__content.size()) |
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279 | self.setAttribute(QNetworkRequest.HttpStatusCodeAttribute, 200) |
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280 | self.setAttribute(QNetworkRequest.HttpReasonPhraseAttribute, "Ok") |
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281 | self.metaDataChanged.emit() |
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282 | self.downloadProgress.emit(self.__content.size(), self.__content.size()) |
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283 | self.readyRead.emit() |
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284 | self.finished.emit() |