eric6/WebBrowser/History/HistoryCompleter.py

Sat, 27 Feb 2021 12:08:23 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Sat, 27 Feb 2021 12:08:23 +0100
changeset 8138
169e65a6787c
parent 7923
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child 8143
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permissions
-rw-r--r--

Shell: added functionality to show a prompt when the main client process has exited (e.g. a script ended).

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2009 - 2021 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 special completer for the history.
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8 """
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9
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10 import re
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11
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12 from PyQt5.QtCore import Qt, QTimer, QSortFilterProxyModel
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13 from PyQt5.QtWidgets import QTableView, QAbstractItemView, QCompleter
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14
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15 from .HistoryModel import HistoryModel
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16 from .HistoryFilterModel import HistoryFilterModel
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17
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18
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19 class HistoryCompletionView(QTableView):
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20 """
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21 Class implementing a special completer view for history based completions.
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22 """
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23 def __init__(self, parent=None):
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24 """
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25 Constructor
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26
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27 @param parent reference to the parent widget (QWidget)
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28 """
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29 super(HistoryCompletionView, self).__init__(parent)
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30
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31 self.horizontalHeader().hide()
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32 self.verticalHeader().hide()
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33
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34 self.setShowGrid(False)
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35
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36 self.setSelectionBehavior(QAbstractItemView.SelectRows)
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37 self.setSelectionMode(QAbstractItemView.SingleSelection)
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38 self.setTextElideMode(Qt.ElideRight)
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39
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40 metrics = self.fontMetrics()
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41 self.verticalHeader().setDefaultSectionSize(metrics.height())
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42
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43 def resizeEvent(self, evt):
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44 """
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45 Protected method handling resize events.
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46
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47 @param evt reference to the resize event (QResizeEvent)
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48 """
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49 self.horizontalHeader().resizeSection(0, 0.65 * self.width())
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50 self.horizontalHeader().setStretchLastSection(True)
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51
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52 super(HistoryCompletionView, self).resizeEvent(evt)
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53
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54 def sizeHintForRow(self, row):
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55 """
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56 Public method to give a size hint for rows.
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57
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58 @param row row number (integer)
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59 @return desired row height (integer)
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60 """
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61 metrics = self.fontMetrics()
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62 return metrics.height()
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63
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64
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65 class HistoryCompletionModel(QSortFilterProxyModel):
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66 """
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67 Class implementing a special model for history based completions.
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68 """
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69 HistoryCompletionRole = HistoryFilterModel.MaxRole + 1
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70
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71 def __init__(self, parent=None):
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72 """
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73 Constructor
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74
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75 @param parent reference to the parent object (QObject)
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76 """
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77 super(HistoryCompletionModel, self).__init__(parent)
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78
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79 self.__searchString = ""
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80 self.__searchMatcher = None
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81 self.__wordMatcher = None
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82 self.__isValid = False
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83
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84 self.setDynamicSortFilter(True)
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85
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86 def data(self, index, role=Qt.DisplayRole):
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87 """
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88 Public method to get data from the model.
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89
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90 @param index index of history entry to get data for (QModelIndex)
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91 @param role data role (integer)
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92 @return history entry data
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93 """
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94 # If the model is valid, tell QCompleter that everything we have
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95 # filtered matches what the user typed; if not, nothing matches
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96 if role == self.HistoryCompletionRole and index.isValid():
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97 if self.isValid():
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98 return "t"
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99 else:
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100 return "f"
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101
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102 if role == Qt.DisplayRole:
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103 if index.column() == 0:
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104 role = HistoryModel.UrlStringRole
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105 else:
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106 role = HistoryModel.TitleRole
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107
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108 return QSortFilterProxyModel.data(self, index, role)
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109
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110 def searchString(self):
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111 """
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112 Public method to get the current search string.
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113
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114 @return current search string (string)
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115 """
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116 return self.__searchString
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117
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118 def setSearchString(self, sstring):
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119 """
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120 Public method to set the current search string.
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121
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122 @param sstring new search string (string)
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123 """
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124 if sstring != self.__searchString:
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125 self.__searchString = sstring
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126 self.__searchMatcher = re.compile(
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127 re.escape(self.__searchString), re.IGNORECASE)
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128 self.__wordMatcher = re.compile(
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129 r"\b" + re.escape(self.__searchString), re.IGNORECASE)
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130 self.invalidateFilter()
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131
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132 def isValid(self):
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133 """
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134 Public method to check the model for validity.
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135
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136 @return flag indicating a valid status (boolean)
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137 """
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138 return self.__isValid
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139
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140 def setValid(self, valid):
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141 """
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142 Public method to set the model's validity.
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143
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144 @param valid flag indicating the new valid status (boolean)
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145 """
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146 if valid == self.__isValid:
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147 return
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148
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149 self.__isValid = valid
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150
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151 # tell the history completer that the model has changed
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152 self.dataChanged.emit(self.index(0, 0), self.index(0,
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153 self.rowCount() - 1))
0
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154
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155 def filterAcceptsRow(self, sourceRow, sourceParent):
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156 """
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157 Public method to determine, if the row is acceptable.
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158
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159 @param sourceRow row number in the source model (integer)
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160 @param sourceParent index of the source item (QModelIndex)
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161 @return flag indicating acceptance (boolean)
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162 """
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163 if self.__searchMatcher is not None:
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164 # Do a case-insensitive substring match against both the url and
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165 # title. It's already ensured, that the user doesn't accidentally
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166 # use regexp metacharacters (s. setSearchString()).
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167 idx = self.sourceModel().index(sourceRow, 0, sourceParent)
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168
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169 url = self.sourceModel().data(idx, HistoryModel.UrlStringRole)
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170 if self.__searchMatcher.search(url) is not None:
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171 return True
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172
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173 title = self.sourceModel().data(idx, HistoryModel.TitleRole)
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174 if self.__searchMatcher.search(title) is not None:
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175 return True
0
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176
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177 return False
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178
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179 def lessThan(self, left, right):
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180 """
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181 Public method used to sort the displayed items.
0
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182
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183 It implements a special sorting function based on the history entry's
0
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184 frequency giving a bonus to hits that match on a word boundary so that
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185 e.g. "dot.python-projects.org" is a better result for typing "dot" than
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186 "slashdot.org". However, it only looks for the string in the host name,
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187 not the entire URL, since while it makes sense to e.g. give
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188 "www.phoronix.com" a bonus for "ph", it does NOT make sense to give
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189 "www.yadda.com/foo.php" the bonus.
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190
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191 @param left index of left item
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192 @type QModelIndex
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193 @param right index of right item
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194 @type QModelIndex
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195 @return true, if left is less than right
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196 @rtype bool
0
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197 """
7268
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198 frequency_L = self.sourceModel().data(
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199 left, HistoryFilterModel.FrequencyRole)
7
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200 url_L = self.sourceModel().data(left, HistoryModel.UrlRole).host()
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201 title_L = self.sourceModel().data(left, HistoryModel.TitleRole)
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202
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203 if (
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204 self.__wordMatcher is not None and
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205 (bool(self.__wordMatcher.search(url_L)) or
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206 bool(self.__wordMatcher.search(title_L)))
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diff changeset
207 ):
0
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208 frequency_L *= 2
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209
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diff changeset
210 frequency_R = self.sourceModel().data(
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parents: 7229
diff changeset
211 right, HistoryFilterModel.FrequencyRole)
7
c679fb30c8f3 Change code dealing with QVariant (and QSettings) to use the PyQt4 QVariant v2 API.
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parents: 0
diff changeset
212 url_R = self.sourceModel().data(right, HistoryModel.UrlRole).host()
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parents: 0
diff changeset
213 title_R = self.sourceModel().data(right, HistoryModel.TitleRole)
0
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214
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215 if (
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diff changeset
216 self.__wordMatcher is not None and
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parents: 7360
diff changeset
217 (bool(self.__wordMatcher.search(url_R)) or
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parents: 7360
diff changeset
218 bool(self.__wordMatcher.search(title_R)))
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219 ):
0
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220 frequency_R *= 2
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221
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222 # Sort results in descending frequency-derived score.
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223 return frequency_R < frequency_L
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224
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225
0
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226 class HistoryCompleter(QCompleter):
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227 """
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parents: 2302
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228 Class implementing a completer for the browser history.
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229 """
945
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230 def __init__(self, model, parent=None):
0
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231 """
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232 Constructor
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233
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234 @param model reference to the model (QAbstractItemModel)
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235 @param parent reference to the parent object (QObject)
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236 """
2525
8b507a9a2d40 Script changes: Future import added, super calls modified and unicode behavior for str.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 2302
diff changeset
237 super(HistoryCompleter, self).__init__(model, parent)
0
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238
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239 self.setPopup(HistoryCompletionView())
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240
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241 # Completion should be against the faked role.
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diff changeset
242 self.setCompletionRole(HistoryCompletionModel.HistoryCompletionRole)
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243
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244 # Since the completion role is faked, advantage of the sorted-model
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245 # optimizations in QCompleter can be taken.
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246 self.setCaseSensitivity(Qt.CaseSensitive)
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247 self.setModelSorting(QCompleter.CaseSensitivelySortedModel)
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248
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249 self.__searchString = ""
323
75182cd9b2c5 Some small tweaks.
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parents: 13
diff changeset
250 self.__filterTimer = QTimer(self)
0
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251 self.__filterTimer.setSingleShot(True)
488
4174c2707dba Continued porting signal/slot usage to the new API.
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diff changeset
252 self.__filterTimer.timeout.connect(self.__updateFilter)
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253
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254 def pathFromIndex(self, idx):
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255 """
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diff changeset
256 Public method to get a path for a given index.
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257
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258 @param idx reference to the index (QModelIndex)
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259 @return the actual URL from the history (string)
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260 """
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261 return self.model().data(idx, HistoryModel.UrlStringRole)
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262
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263 def splitPath(self, path):
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264 """
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265 Public method to split the given path into strings, that are used to
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266 match at each level in the model.
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267
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268 @param path path to be split (string)
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269 @return list of path elements (list of strings)
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270 """
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271 if path == self.__searchString:
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272 return ["t"]
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273
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274 # Queue an update to the search string. Wait a bit, so that if the user
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275 # is quickly typing, the completer doesn't try to complete until they
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276 # pause.
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277 if self.__filterTimer.isActive():
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278 self.__filterTimer.stop()
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279 self.__filterTimer.start(150)
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280
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281 # If the previous search results are not a superset of the current
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282 # search results, tell the model that it is not valid yet.
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283 if not path.startswith(self.__searchString):
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284 self.model().setValid(False)
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285
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286 self.__searchString = path
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287
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288 # The actual filtering is done by the HistoryCompletionModel. Just
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289 # return a short dummy here so that QCompleter thinks everything
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290 # matched.
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291 return ["t"]
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292
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293 def __updateFilter(self):
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294 """
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295 Private slot to update the search string.
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296 """
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297 completionModel = self.model()
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298
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299 # Tell the HistoryCompletionModel about the new search string.
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300 completionModel.setSearchString(self.__searchString)
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301
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302 # Sort the model.
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303 completionModel.sort(0)
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304
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305 # Mark it valid.
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306 completionModel.setValid(True)
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307
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308 # Now update the QCompleter widget, but only if the user is still
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309 # typing a URL.
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310 if self.widget() is not None and self.widget().hasFocus():
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311 self.complete()

eric ide

mercurial