1 | # text.tcl -- |
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2 | # |
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3 | # This file defines the default bindings for Tk text widgets and provides |
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4 | # procedures that help in implementing the bindings. |
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5 | # |
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6 | # RCS: @(#) $Id: text.tcl,v 1.24.2.2 2004/02/17 07:17:17 das Exp $ |
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7 | # |
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8 | # Copyright (c) 1992-1994 The Regents of the University of California. |
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9 | # Copyright (c) 1994-1997 Sun Microsystems, Inc. |
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10 | # Copyright (c) 1998 by Scriptics Corporation. |
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11 | # |
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12 | # See the file "license.terms" for information on usage and redistribution |
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13 | # of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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14 | # |
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15 | |
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16 | #------------------------------------------------------------------------- |
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17 | # Elements of ::tk::Priv that are used in this file: |
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18 | # |
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19 | # afterId - If non-null, it means that auto-scanning is underway |
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20 | # and it gives the "after" id for the next auto-scan |
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21 | # command to be executed. |
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22 | # char - Character position on the line; kept in order |
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23 | # to allow moving up or down past short lines while |
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24 | # still remembering the desired position. |
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25 | # mouseMoved - Non-zero means the mouse has moved a significant |
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26 | # amount since the button went down (so, for example, |
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27 | # start dragging out a selection). |
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28 | # prevPos - Used when moving up or down lines via the keyboard. |
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29 | # Keeps track of the previous insert position, so |
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30 | # we can distinguish a series of ups and downs, all |
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31 | # in a row, from a new up or down. |
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32 | # selectMode - The style of selection currently underway: |
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33 | # char, word, or line. |
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34 | # x, y - Last known mouse coordinates for scanning |
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35 | # and auto-scanning. |
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36 | #------------------------------------------------------------------------- |
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37 | |
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38 | #------------------------------------------------------------------------- |
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39 | # The code below creates the default class bindings for text widgets. |
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40 | #------------------------------------------------------------------------- |
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41 | |
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42 | # Standard Motif bindings: |
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43 | |
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44 | bind Text <1> { |
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45 | tk::TextButton1 %W %x %y |
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46 | %W tag remove sel 0.0 end |
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47 | } |
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48 | bind Text <B1-Motion> { |
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49 | set tk::Priv(x) %x |
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50 | set tk::Priv(y) %y |
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51 | tk::TextSelectTo %W %x %y |
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52 | } |
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53 | bind Text <Double-1> { |
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54 | set tk::Priv(selectMode) word |
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55 | tk::TextSelectTo %W %x %y |
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56 | catch {%W mark set insert sel.last} |
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57 | } |
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58 | bind Text <Triple-1> { |
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59 | set tk::Priv(selectMode) line |
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60 | tk::TextSelectTo %W %x %y |
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61 | catch {%W mark set insert sel.last} |
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62 | } |
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63 | bind Text <Shift-1> { |
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64 | tk::TextResetAnchor %W @%x,%y |
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65 | set tk::Priv(selectMode) char |
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66 | tk::TextSelectTo %W %x %y |
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67 | } |
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68 | bind Text <Double-Shift-1> { |
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69 | set tk::Priv(selectMode) word |
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70 | tk::TextSelectTo %W %x %y 1 |
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71 | } |
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72 | bind Text <Triple-Shift-1> { |
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73 | set tk::Priv(selectMode) line |
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74 | tk::TextSelectTo %W %x %y |
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75 | } |
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76 | bind Text <B1-Leave> { |
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77 | set tk::Priv(x) %x |
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78 | set tk::Priv(y) %y |
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79 | tk::TextAutoScan %W |
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80 | } |
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81 | bind Text <B1-Enter> { |
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82 | tk::CancelRepeat |
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83 | } |
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84 | bind Text <ButtonRelease-1> { |
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85 | tk::CancelRepeat |
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86 | } |
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87 | bind Text <Control-1> { |
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88 | %W mark set insert @%x,%y |
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89 | } |
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90 | bind Text <Left> { |
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91 | tk::TextSetCursor %W insert-1c |
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92 | } |
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93 | bind Text <Right> { |
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94 | tk::TextSetCursor %W insert+1c |
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95 | } |
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96 | bind Text <Up> { |
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97 | tk::TextSetCursor %W [tk::TextUpDownLine %W -1] |
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98 | } |
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99 | bind Text <Down> { |
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100 | tk::TextSetCursor %W [tk::TextUpDownLine %W 1] |
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101 | } |
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102 | bind Text <Shift-Left> { |
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103 | tk::TextKeySelect %W [%W index {insert - 1c}] |
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104 | } |
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105 | bind Text <Shift-Right> { |
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106 | tk::TextKeySelect %W [%W index {insert + 1c}] |
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107 | } |
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108 | bind Text <Shift-Up> { |
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109 | tk::TextKeySelect %W [tk::TextUpDownLine %W -1] |
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110 | } |
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111 | bind Text <Shift-Down> { |
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112 | tk::TextKeySelect %W [tk::TextUpDownLine %W 1] |
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113 | } |
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114 | bind Text <Control-Left> { |
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115 | tk::TextSetCursor %W [tk::TextPrevPos %W insert tcl_startOfPreviousWord] |
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116 | } |
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117 | bind Text <Control-Right> { |
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118 | tk::TextSetCursor %W [tk::TextNextWord %W insert] |
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119 | } |
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120 | bind Text <Control-Up> { |
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121 | tk::TextSetCursor %W [tk::TextPrevPara %W insert] |
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122 | } |
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123 | bind Text <Control-Down> { |
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124 | tk::TextSetCursor %W [tk::TextNextPara %W insert] |
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125 | } |
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126 | bind Text <Shift-Control-Left> { |
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127 | tk::TextKeySelect %W [tk::TextPrevPos %W insert tcl_startOfPreviousWord] |
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128 | } |
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129 | bind Text <Shift-Control-Right> { |
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130 | tk::TextKeySelect %W [tk::TextNextWord %W insert] |
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131 | } |
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132 | bind Text <Shift-Control-Up> { |
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133 | tk::TextKeySelect %W [tk::TextPrevPara %W insert] |
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134 | } |
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135 | bind Text <Shift-Control-Down> { |
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136 | tk::TextKeySelect %W [tk::TextNextPara %W insert] |
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137 | } |
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138 | bind Text <Prior> { |
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139 | tk::TextSetCursor %W [tk::TextScrollPages %W -1] |
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140 | } |
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141 | bind Text <Shift-Prior> { |
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142 | tk::TextKeySelect %W [tk::TextScrollPages %W -1] |
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143 | } |
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144 | bind Text <Next> { |
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145 | tk::TextSetCursor %W [tk::TextScrollPages %W 1] |
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146 | } |
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147 | bind Text <Shift-Next> { |
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148 | tk::TextKeySelect %W [tk::TextScrollPages %W 1] |
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149 | } |
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150 | bind Text <Control-Prior> { |
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151 | %W xview scroll -1 page |
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152 | } |
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153 | bind Text <Control-Next> { |
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154 | %W xview scroll 1 page |
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155 | } |
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156 | |
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157 | bind Text <Home> { |
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158 | tk::TextSetCursor %W {insert linestart} |
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159 | } |
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160 | bind Text <Shift-Home> { |
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161 | tk::TextKeySelect %W {insert linestart} |
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162 | } |
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163 | bind Text <End> { |
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164 | tk::TextSetCursor %W {insert lineend} |
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165 | } |
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166 | bind Text <Shift-End> { |
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167 | tk::TextKeySelect %W {insert lineend} |
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168 | } |
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169 | bind Text <Control-Home> { |
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170 | tk::TextSetCursor %W 1.0 |
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171 | } |
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172 | bind Text <Control-Shift-Home> { |
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173 | tk::TextKeySelect %W 1.0 |
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174 | } |
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175 | bind Text <Control-End> { |
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176 | tk::TextSetCursor %W {end - 1 char} |
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177 | } |
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178 | bind Text <Control-Shift-End> { |
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179 | tk::TextKeySelect %W {end - 1 char} |
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180 | } |
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181 | |
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182 | bind Text <Tab> { |
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183 | if { [string equal [%W cget -state] "normal"] } { |
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184 | tk::TextInsert %W \t |
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185 | focus %W |
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186 | break |
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187 | } |
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188 | } |
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189 | bind Text <Shift-Tab> { |
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190 | # Needed only to keep <Tab> binding from triggering; doesn't |
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191 | # have to actually do anything. |
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192 | break |
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193 | } |
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194 | bind Text <Control-Tab> { |
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195 | focus [tk_focusNext %W] |
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196 | } |
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197 | bind Text <Control-Shift-Tab> { |
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198 | focus [tk_focusPrev %W] |
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199 | } |
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200 | bind Text <Control-i> { |
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201 | tk::TextInsert %W \t |
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202 | } |
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203 | bind Text <Return> { |
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204 | tk::TextInsert %W \n |
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205 | if {[%W cget -autoseparators]} {%W edit separator} |
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206 | } |
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207 | bind Text <Delete> { |
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208 | if {[string compare [%W tag nextrange sel 1.0 end] ""]} { |
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209 | %W delete sel.first sel.last |
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210 | } else { |
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211 | %W delete insert |
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212 | %W see insert |
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213 | } |
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214 | } |
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215 | bind Text <BackSpace> { |
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216 | if {[string compare [%W tag nextrange sel 1.0 end] ""]} { |
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217 | %W delete sel.first sel.last |
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218 | } elseif {[%W compare insert != 1.0]} { |
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219 | %W delete insert-1c |
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220 | %W see insert |
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221 | } |
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222 | } |
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223 | |
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224 | bind Text <Control-space> { |
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225 | %W mark set anchor insert |
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226 | } |
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227 | bind Text <Select> { |
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228 | %W mark set anchor insert |
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229 | } |
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230 | bind Text <Control-Shift-space> { |
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231 | set tk::Priv(selectMode) char |
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232 | tk::TextKeyExtend %W insert |
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233 | } |
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234 | bind Text <Shift-Select> { |
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235 | set tk::Priv(selectMode) char |
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236 | tk::TextKeyExtend %W insert |
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237 | } |
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238 | bind Text <Control-slash> { |
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239 | %W tag add sel 1.0 end |
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240 | } |
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241 | bind Text <Control-backslash> { |
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242 | %W tag remove sel 1.0 end |
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243 | } |
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244 | bind Text <<Cut>> { |
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245 | tk_textCut %W |
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246 | } |
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247 | bind Text <<Copy>> { |
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248 | tk_textCopy %W |
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249 | } |
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250 | bind Text <<Paste>> { |
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251 | tk_textPaste %W |
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252 | } |
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253 | bind Text <<Clear>> { |
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254 | catch {%W delete sel.first sel.last} |
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255 | } |
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256 | bind Text <<PasteSelection>> { |
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257 | if {$tk_strictMotif || ![info exists tk::Priv(mouseMoved)] |
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258 | || !$tk::Priv(mouseMoved)} { |
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259 | tk::TextPasteSelection %W %x %y |
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260 | } |
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261 | } |
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262 | bind Text <Insert> { |
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263 | catch {tk::TextInsert %W [::tk::GetSelection %W PRIMARY]} |
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264 | } |
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265 | bind Text <KeyPress> { |
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266 | tk::TextInsert %W %A |
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267 | } |
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268 | |
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269 | # Ignore all Alt, Meta, and Control keypresses unless explicitly bound. |
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270 | # Otherwise, if a widget binding for one of these is defined, the |
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271 | # <KeyPress> class binding will also fire and insert the character, |
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272 | # which is wrong. Ditto for <Escape>. |
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273 | |
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274 | bind Text <Alt-KeyPress> {# nothing } |
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275 | bind Text <Meta-KeyPress> {# nothing} |
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276 | bind Text <Control-KeyPress> {# nothing} |
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277 | bind Text <Escape> {# nothing} |
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278 | bind Text <KP_Enter> {# nothing} |
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279 | if {[string equal [tk windowingsystem] "classic"] |
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280 | || [string equal [tk windowingsystem] "aqua"]} { |
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281 | bind Text <Command-KeyPress> {# nothing} |
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282 | } |
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283 | |
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284 | # Additional emacs-like bindings: |
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285 | |
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286 | bind Text <Control-a> { |
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287 | if {!$tk_strictMotif} { |
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288 | tk::TextSetCursor %W {insert linestart} |
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289 | } |
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290 | } |
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291 | bind Text <Control-b> { |
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292 | if {!$tk_strictMotif} { |
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293 | tk::TextSetCursor %W insert-1c |
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294 | } |
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295 | } |
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296 | bind Text <Control-d> { |
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297 | if {!$tk_strictMotif} { |
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298 | %W delete insert |
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299 | } |
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300 | } |
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301 | bind Text <Control-e> { |
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302 | if {!$tk_strictMotif} { |
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303 | tk::TextSetCursor %W {insert lineend} |
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304 | } |
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305 | } |
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306 | bind Text <Control-f> { |
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307 | if {!$tk_strictMotif} { |
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308 | tk::TextSetCursor %W insert+1c |
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309 | } |
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310 | } |
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311 | bind Text <Control-k> { |
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312 | if {!$tk_strictMotif} { |
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313 | if {[%W compare insert == {insert lineend}]} { |
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314 | %W delete insert |
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315 | } else { |
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316 | %W delete insert {insert lineend} |
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317 | } |
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318 | } |
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319 | } |
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320 | bind Text <Control-n> { |
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321 | if {!$tk_strictMotif} { |
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322 | tk::TextSetCursor %W [tk::TextUpDownLine %W 1] |
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323 | } |
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324 | } |
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325 | bind Text <Control-o> { |
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326 | if {!$tk_strictMotif} { |
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327 | %W insert insert \n |
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328 | %W mark set insert insert-1c |
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329 | } |
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330 | } |
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331 | bind Text <Control-p> { |
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332 | if {!$tk_strictMotif} { |
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333 | tk::TextSetCursor %W [tk::TextUpDownLine %W -1] |
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334 | } |
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335 | } |
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336 | bind Text <Control-t> { |
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337 | if {!$tk_strictMotif} { |
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338 | tk::TextTranspose %W |
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339 | } |
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340 | } |
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341 | |
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342 | bind Text <<Undo>> { |
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343 | catch { %W edit undo } |
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344 | } |
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345 | |
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346 | bind Text <<Redo>> { |
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347 | catch { %W edit redo } |
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348 | } |
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349 | |
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350 | if {[string compare $tcl_platform(platform) "windows"]} { |
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351 | bind Text <Control-v> { |
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352 | if {!$tk_strictMotif} { |
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353 | tk::TextScrollPages %W 1 |
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354 | } |
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355 | } |
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356 | } |
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357 | |
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358 | bind Text <Meta-b> { |
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359 | if {!$tk_strictMotif} { |
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360 | tk::TextSetCursor %W [tk::TextPrevPos %W insert tcl_startOfPreviousWord] |
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361 | } |
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362 | } |
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363 | bind Text <Meta-d> { |
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364 | if {!$tk_strictMotif} { |
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365 | %W delete insert [tk::TextNextWord %W insert] |
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366 | } |
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367 | } |
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368 | bind Text <Meta-f> { |
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369 | if {!$tk_strictMotif} { |
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370 | tk::TextSetCursor %W [tk::TextNextWord %W insert] |
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371 | } |
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372 | } |
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373 | bind Text <Meta-less> { |
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374 | if {!$tk_strictMotif} { |
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375 | tk::TextSetCursor %W 1.0 |
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376 | } |
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377 | } |
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378 | bind Text <Meta-greater> { |
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379 | if {!$tk_strictMotif} { |
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380 | tk::TextSetCursor %W end-1c |
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381 | } |
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382 | } |
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383 | bind Text <Meta-BackSpace> { |
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384 | if {!$tk_strictMotif} { |
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385 | %W delete [tk::TextPrevPos %W insert tcl_startOfPreviousWord] insert |
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386 | } |
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387 | } |
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388 | bind Text <Meta-Delete> { |
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389 | if {!$tk_strictMotif} { |
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390 | %W delete [tk::TextPrevPos %W insert tcl_startOfPreviousWord] insert |
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391 | } |
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392 | } |
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393 | |
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394 | # Macintosh only bindings: |
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395 | |
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396 | # if text black & highlight black -> text white, other text the same |
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397 | if {[string equal [tk windowingsystem] "classic"] |
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398 | || [string equal [tk windowingsystem] "aqua"]} { |
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399 | bind Text <FocusIn> { |
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400 | %W tag configure sel -borderwidth 0 |
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401 | %W configure -selectbackground systemHighlight -selectforeground systemHighlightText |
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402 | } |
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403 | bind Text <FocusOut> { |
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404 | %W tag configure sel -borderwidth 1 |
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405 | %W configure -selectbackground white -selectforeground black |
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406 | } |
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407 | bind Text <Option-Left> { |
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408 | tk::TextSetCursor %W [tk::TextPrevPos %W insert tcl_startOfPreviousWord] |
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409 | } |
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410 | bind Text <Option-Right> { |
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411 | tk::TextSetCursor %W [tk::TextNextWord %W insert] |
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412 | } |
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413 | bind Text <Option-Up> { |
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414 | tk::TextSetCursor %W [tk::TextPrevPara %W insert] |
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415 | } |
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416 | bind Text <Option-Down> { |
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417 | tk::TextSetCursor %W [tk::TextNextPara %W insert] |
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418 | } |
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419 | bind Text <Shift-Option-Left> { |
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420 | tk::TextKeySelect %W [tk::TextPrevPos %W insert tcl_startOfPreviousWord] |
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421 | } |
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422 | bind Text <Shift-Option-Right> { |
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423 | tk::TextKeySelect %W [tk::TextNextWord %W insert] |
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424 | } |
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425 | bind Text <Shift-Option-Up> { |
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426 | tk::TextKeySelect %W [tk::TextPrevPara %W insert] |
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427 | } |
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428 | bind Text <Shift-Option-Down> { |
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429 | tk::TextKeySelect %W [tk::TextNextPara %W insert] |
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430 | } |
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431 | |
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432 | # End of Mac only bindings |
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433 | } |
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434 | |
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435 | # A few additional bindings of my own. |
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436 | |
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437 | bind Text <Control-h> { |
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438 | if {!$tk_strictMotif} { |
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439 | if {[%W compare insert != 1.0]} { |
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440 | %W delete insert-1c |
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441 | %W see insert |
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442 | } |
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443 | } |
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444 | } |
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445 | bind Text <2> { |
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446 | if {!$tk_strictMotif} { |
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447 | tk::TextScanMark %W %x %y |
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448 | } |
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449 | } |
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450 | bind Text <B2-Motion> { |
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451 | if {!$tk_strictMotif} { |
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452 | tk::TextScanDrag %W %x %y |
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453 | } |
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454 | } |
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455 | set ::tk::Priv(prevPos) {} |
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456 | |
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457 | # The MouseWheel will typically only fire on Windows. However, |
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458 | # someone could use the "event generate" command to produce one |
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459 | # on other platforms. |
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460 | |
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461 | if {[string equal [tk windowingsystem] "classic"] |
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462 | || [string equal [tk windowingsystem] "aqua"]} { |
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463 | bind Text <MouseWheel> { |
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464 | %W yview scroll [expr {- (%D)}] units |
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465 | } |
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466 | bind Text <Option-MouseWheel> { |
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467 | %W yview scroll [expr {-10 * (%D)}] units |
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468 | } |
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469 | bind Text <Shift-MouseWheel> { |
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470 | %W xview scroll [expr {- (%D)}] units |
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471 | } |
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472 | bind Text <Shift-Option-MouseWheel> { |
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473 | %W xview scroll [expr {-10 * (%D)}] units |
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474 | } |
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475 | } else { |
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476 | bind Text <MouseWheel> { |
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477 | %W yview scroll [expr {- (%D / 120) * 4}] units |
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478 | } |
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479 | } |
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480 | |
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481 | if {[string equal "x11" [tk windowingsystem]]} { |
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482 | # Support for mousewheels on Linux/Unix commonly comes through mapping |
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483 | # the wheel to the extended buttons. If you have a mousewheel, find |
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484 | # Linux configuration info at: |
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485 | # http://www.inria.fr/koala/colas/mouse-wheel-scroll/ |
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486 | bind Text <4> { |
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487 | if {!$tk_strictMotif} { |
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488 | %W yview scroll -5 units |
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489 | } |
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490 | } |
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491 | bind Text <5> { |
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492 | if {!$tk_strictMotif} { |
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493 | %W yview scroll 5 units |
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494 | } |
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495 | } |
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496 | } |
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497 | |
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498 | # ::tk::TextClosestGap -- |
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499 | # Given x and y coordinates, this procedure finds the closest boundary |
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500 | # between characters to the given coordinates and returns the index |
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501 | # of the character just after the boundary. |
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502 | # |
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503 | # Arguments: |
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504 | # w - The text window. |
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505 | # x - X-coordinate within the window. |
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506 | # y - Y-coordinate within the window. |
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507 | |
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508 | proc ::tk::TextClosestGap {w x y} { |
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509 | set pos [$w index @$x,$y] |
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510 | set bbox [$w bbox $pos] |
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511 | if {[string equal $bbox ""]} { |
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512 | return $pos |
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513 | } |
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514 | if {($x - [lindex $bbox 0]) < ([lindex $bbox 2]/2)} { |
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515 | return $pos |
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516 | } |
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517 | $w index "$pos + 1 char" |
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518 | } |
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519 | |
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520 | # ::tk::TextButton1 -- |
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521 | # This procedure is invoked to handle button-1 presses in text |
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522 | # widgets. It moves the insertion cursor, sets the selection anchor, |
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523 | # and claims the input focus. |
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524 | # |
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525 | # Arguments: |
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526 | # w - The text window in which the button was pressed. |
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527 | # x - The x-coordinate of the button press. |
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528 | # y - The x-coordinate of the button press. |
---|
529 | |
---|
530 | proc ::tk::TextButton1 {w x y} { |
---|
531 | variable ::tk::Priv |
---|
532 | |
---|
533 | set Priv(selectMode) char |
---|
534 | set Priv(mouseMoved) 0 |
---|
535 | set Priv(pressX) $x |
---|
536 | $w mark set insert [TextClosestGap $w $x $y] |
---|
537 | $w mark set anchor insert |
---|
538 | # Allow focus in any case on Windows, because that will let the |
---|
539 | # selection be displayed even for state disabled text widgets. |
---|
540 | if {[string equal $::tcl_platform(platform) "windows"] \ |
---|
541 | || [string equal [$w cget -state] "normal"]} {focus $w} |
---|
542 | if {[$w cget -autoseparators]} {$w edit separator} |
---|
543 | } |
---|
544 | |
---|
545 | # ::tk::TextSelectTo -- |
---|
546 | # This procedure is invoked to extend the selection, typically when |
---|
547 | # dragging it with the mouse. Depending on the selection mode (character, |
---|
548 | # word, line) it selects in different-sized units. This procedure |
---|
549 | # ignores mouse motions initially until the mouse has moved from |
---|
550 | # one character to another or until there have been multiple clicks. |
---|
551 | # |
---|
552 | # Arguments: |
---|
553 | # w - The text window in which the button was pressed. |
---|
554 | # x - Mouse x position. |
---|
555 | # y - Mouse y position. |
---|
556 | |
---|
557 | proc ::tk::TextSelectTo {w x y {extend 0}} { |
---|
558 | global tcl_platform |
---|
559 | variable ::tk::Priv |
---|
560 | |
---|
561 | set cur [TextClosestGap $w $x $y] |
---|
562 | if {[catch {$w index anchor}]} { |
---|
563 | $w mark set anchor $cur |
---|
564 | } |
---|
565 | set anchor [$w index anchor] |
---|
566 | if {[$w compare $cur != $anchor] || (abs($Priv(pressX) - $x) >= 3)} { |
---|
567 | set Priv(mouseMoved) 1 |
---|
568 | } |
---|
569 | switch $Priv(selectMode) { |
---|
570 | char { |
---|
571 | if {[$w compare $cur < anchor]} { |
---|
572 | set first $cur |
---|
573 | set last anchor |
---|
574 | } else { |
---|
575 | set first anchor |
---|
576 | set last $cur |
---|
577 | } |
---|
578 | } |
---|
579 | word { |
---|
580 | if {[$w compare $cur < anchor]} { |
---|
581 | set first [TextPrevPos $w "$cur + 1c" tcl_wordBreakBefore] |
---|
582 | if { !$extend } { |
---|
583 | set last [TextNextPos $w "anchor" tcl_wordBreakAfter] |
---|
584 | } else { |
---|
585 | set last anchor |
---|
586 | } |
---|
587 | } else { |
---|
588 | set last [TextNextPos $w "$cur - 1c" tcl_wordBreakAfter] |
---|
589 | if { !$extend } { |
---|
590 | set first [TextPrevPos $w anchor tcl_wordBreakBefore] |
---|
591 | } else { |
---|
592 | set first anchor |
---|
593 | } |
---|
594 | } |
---|
595 | } |
---|
596 | line { |
---|
597 | if {[$w compare $cur < anchor]} { |
---|
598 | set first [$w index "$cur linestart"] |
---|
599 | set last [$w index "anchor - 1c lineend + 1c"] |
---|
600 | } else { |
---|
601 | set first [$w index "anchor linestart"] |
---|
602 | set last [$w index "$cur lineend + 1c"] |
---|
603 | } |
---|
604 | } |
---|
605 | } |
---|
606 | if {$Priv(mouseMoved) || [string compare $Priv(selectMode) "char"]} { |
---|
607 | $w tag remove sel 0.0 end |
---|
608 | $w mark set insert $cur |
---|
609 | $w tag add sel $first $last |
---|
610 | $w tag remove sel $last end |
---|
611 | update idletasks |
---|
612 | } |
---|
613 | } |
---|
614 | |
---|
615 | # ::tk::TextKeyExtend -- |
---|
616 | # This procedure handles extending the selection from the keyboard, |
---|
617 | # where the point to extend to is really the boundary between two |
---|
618 | # characters rather than a particular character. |
---|
619 | # |
---|
620 | # Arguments: |
---|
621 | # w - The text window. |
---|
622 | # index - The point to which the selection is to be extended. |
---|
623 | |
---|
624 | proc ::tk::TextKeyExtend {w index} { |
---|
625 | |
---|
626 | set cur [$w index $index] |
---|
627 | if {[catch {$w index anchor}]} { |
---|
628 | $w mark set anchor $cur |
---|
629 | } |
---|
630 | set anchor [$w index anchor] |
---|
631 | if {[$w compare $cur < anchor]} { |
---|
632 | set first $cur |
---|
633 | set last anchor |
---|
634 | } else { |
---|
635 | set first anchor |
---|
636 | set last $cur |
---|
637 | } |
---|
638 | $w tag remove sel 0.0 $first |
---|
639 | $w tag add sel $first $last |
---|
640 | $w tag remove sel $last end |
---|
641 | } |
---|
642 | |
---|
643 | # ::tk::TextPasteSelection -- |
---|
644 | # This procedure sets the insertion cursor to the mouse position, |
---|
645 | # inserts the selection, and sets the focus to the window. |
---|
646 | # |
---|
647 | # Arguments: |
---|
648 | # w - The text window. |
---|
649 | # x, y - Position of the mouse. |
---|
650 | |
---|
651 | proc ::tk::TextPasteSelection {w x y} { |
---|
652 | $w mark set insert [TextClosestGap $w $x $y] |
---|
653 | if {![catch {::tk::GetSelection $w PRIMARY} sel]} { |
---|
654 | set oldSeparator [$w cget -autoseparators] |
---|
655 | if {$oldSeparator} { |
---|
656 | $w configure -autoseparators 0 |
---|
657 | $w edit separator |
---|
658 | } |
---|
659 | $w insert insert $sel |
---|
660 | if {$oldSeparator} { |
---|
661 | $w edit separator |
---|
662 | $w configure -autoseparators 1 |
---|
663 | } |
---|
664 | } |
---|
665 | if {[string equal [$w cget -state] "normal"]} {focus $w} |
---|
666 | } |
---|
667 | |
---|
668 | # ::tk::TextAutoScan -- |
---|
669 | # This procedure is invoked when the mouse leaves a text window |
---|
670 | # with button 1 down. It scrolls the window up, down, left, or right, |
---|
671 | # depending on where the mouse is (this information was saved in |
---|
672 | # ::tk::Priv(x) and ::tk::Priv(y)), and reschedules itself as an "after" |
---|
673 | # command so that the window continues to scroll until the mouse |
---|
674 | # moves back into the window or the mouse button is released. |
---|
675 | # |
---|
676 | # Arguments: |
---|
677 | # w - The text window. |
---|
678 | |
---|
679 | proc ::tk::TextAutoScan {w} { |
---|
680 | variable ::tk::Priv |
---|
681 | if {![winfo exists $w]} return |
---|
682 | if {$Priv(y) >= [winfo height $w]} { |
---|
683 | $w yview scroll 2 units |
---|
684 | } elseif {$Priv(y) < 0} { |
---|
685 | $w yview scroll -2 units |
---|
686 | } elseif {$Priv(x) >= [winfo width $w]} { |
---|
687 | $w xview scroll 2 units |
---|
688 | } elseif {$Priv(x) < 0} { |
---|
689 | $w xview scroll -2 units |
---|
690 | } else { |
---|
691 | return |
---|
692 | } |
---|
693 | TextSelectTo $w $Priv(x) $Priv(y) |
---|
694 | set Priv(afterId) [after 50 [list tk::TextAutoScan $w]] |
---|
695 | } |
---|
696 | |
---|
697 | # ::tk::TextSetCursor |
---|
698 | # Move the insertion cursor to a given position in a text. Also |
---|
699 | # clears the selection, if there is one in the text, and makes sure |
---|
700 | # that the insertion cursor is visible. Also, don't let the insertion |
---|
701 | # cursor appear on the dummy last line of the text. |
---|
702 | # |
---|
703 | # Arguments: |
---|
704 | # w - The text window. |
---|
705 | # pos - The desired new position for the cursor in the window. |
---|
706 | |
---|
707 | proc ::tk::TextSetCursor {w pos} { |
---|
708 | |
---|
709 | if {[$w compare $pos == end]} { |
---|
710 | set pos {end - 1 chars} |
---|
711 | } |
---|
712 | $w mark set insert $pos |
---|
713 | $w tag remove sel 1.0 end |
---|
714 | $w see insert |
---|
715 | if {[$w cget -autoseparators]} {$w edit separator} |
---|
716 | } |
---|
717 | |
---|
718 | # ::tk::TextKeySelect |
---|
719 | # This procedure is invoked when stroking out selections using the |
---|
720 | # keyboard. It moves the cursor to a new position, then extends |
---|
721 | # the selection to that position. |
---|
722 | # |
---|
723 | # Arguments: |
---|
724 | # w - The text window. |
---|
725 | # new - A new position for the insertion cursor (the cursor hasn't |
---|
726 | # actually been moved to this position yet). |
---|
727 | |
---|
728 | proc ::tk::TextKeySelect {w new} { |
---|
729 | |
---|
730 | if {[string equal [$w tag nextrange sel 1.0 end] ""]} { |
---|
731 | if {[$w compare $new < insert]} { |
---|
732 | $w tag add sel $new insert |
---|
733 | } else { |
---|
734 | $w tag add sel insert $new |
---|
735 | } |
---|
736 | $w mark set anchor insert |
---|
737 | } else { |
---|
738 | if {[$w compare $new < anchor]} { |
---|
739 | set first $new |
---|
740 | set last anchor |
---|
741 | } else { |
---|
742 | set first anchor |
---|
743 | set last $new |
---|
744 | } |
---|
745 | $w tag remove sel 1.0 $first |
---|
746 | $w tag add sel $first $last |
---|
747 | $w tag remove sel $last end |
---|
748 | } |
---|
749 | $w mark set insert $new |
---|
750 | $w see insert |
---|
751 | update idletasks |
---|
752 | } |
---|
753 | |
---|
754 | # ::tk::TextResetAnchor -- |
---|
755 | # Set the selection anchor to whichever end is farthest from the |
---|
756 | # index argument. One special trick: if the selection has two or |
---|
757 | # fewer characters, just leave the anchor where it is. In this |
---|
758 | # case it doesn't matter which point gets chosen for the anchor, |
---|
759 | # and for the things like Shift-Left and Shift-Right this produces |
---|
760 | # better behavior when the cursor moves back and forth across the |
---|
761 | # anchor. |
---|
762 | # |
---|
763 | # Arguments: |
---|
764 | # w - The text widget. |
---|
765 | # index - Position at which mouse button was pressed, which determines |
---|
766 | # which end of selection should be used as anchor point. |
---|
767 | |
---|
768 | proc ::tk::TextResetAnchor {w index} { |
---|
769 | |
---|
770 | if {[string equal [$w tag ranges sel] ""]} { |
---|
771 | # Don't move the anchor if there is no selection now; this makes |
---|
772 | # the widget behave "correctly" when the user clicks once, then |
---|
773 | # shift-clicks somewhere -- ie, the area between the two clicks will be |
---|
774 | # selected. [Bug: 5929]. |
---|
775 | return |
---|
776 | } |
---|
777 | set a [$w index $index] |
---|
778 | set b [$w index sel.first] |
---|
779 | set c [$w index sel.last] |
---|
780 | if {[$w compare $a < $b]} { |
---|
781 | $w mark set anchor sel.last |
---|
782 | return |
---|
783 | } |
---|
784 | if {[$w compare $a > $c]} { |
---|
785 | $w mark set anchor sel.first |
---|
786 | return |
---|
787 | } |
---|
788 | scan $a "%d.%d" lineA chA |
---|
789 | scan $b "%d.%d" lineB chB |
---|
790 | scan $c "%d.%d" lineC chC |
---|
791 | if {$lineB < $lineC+2} { |
---|
792 | set total [string length [$w get $b $c]] |
---|
793 | if {$total <= 2} { |
---|
794 | return |
---|
795 | } |
---|
796 | if {[string length [$w get $b $a]] < ($total/2)} { |
---|
797 | $w mark set anchor sel.last |
---|
798 | } else { |
---|
799 | $w mark set anchor sel.first |
---|
800 | } |
---|
801 | return |
---|
802 | } |
---|
803 | if {($lineA-$lineB) < ($lineC-$lineA)} { |
---|
804 | $w mark set anchor sel.last |
---|
805 | } else { |
---|
806 | $w mark set anchor sel.first |
---|
807 | } |
---|
808 | } |
---|
809 | |
---|
810 | # ::tk::TextInsert -- |
---|
811 | # Insert a string into a text at the point of the insertion cursor. |
---|
812 | # If there is a selection in the text, and it covers the point of the |
---|
813 | # insertion cursor, then delete the selection before inserting. |
---|
814 | # |
---|
815 | # Arguments: |
---|
816 | # w - The text window in which to insert the string |
---|
817 | # s - The string to insert (usually just a single character) |
---|
818 | |
---|
819 | proc ::tk::TextInsert {w s} { |
---|
820 | if {[string equal $s ""] || [string equal [$w cget -state] "disabled"]} { |
---|
821 | return |
---|
822 | } |
---|
823 | set compound 0 |
---|
824 | catch { |
---|
825 | if {[$w compare sel.first <= insert] \ |
---|
826 | && [$w compare sel.last >= insert]} { |
---|
827 | set oldSeparator [$w cget -autoseparators] |
---|
828 | if { $oldSeparator } { |
---|
829 | $w configure -autoseparators 0 |
---|
830 | $w edit separator |
---|
831 | set compound 1 |
---|
832 | } |
---|
833 | $w delete sel.first sel.last |
---|
834 | } |
---|
835 | } |
---|
836 | $w insert insert $s |
---|
837 | $w see insert |
---|
838 | if { $compound && $oldSeparator } { |
---|
839 | $w edit separator |
---|
840 | $w configure -autoseparators 1 |
---|
841 | } |
---|
842 | } |
---|
843 | |
---|
844 | # ::tk::TextUpDownLine -- |
---|
845 | # Returns the index of the character one line above or below the |
---|
846 | # insertion cursor. There are two tricky things here. First, |
---|
847 | # we want to maintain the original column across repeated operations, |
---|
848 | # even though some lines that will get passed through don't have |
---|
849 | # enough characters to cover the original column. Second, don't |
---|
850 | # try to scroll past the beginning or end of the text. |
---|
851 | # |
---|
852 | # Arguments: |
---|
853 | # w - The text window in which the cursor is to move. |
---|
854 | # n - The number of lines to move: -1 for up one line, |
---|
855 | # +1 for down one line. |
---|
856 | |
---|
857 | proc ::tk::TextUpDownLine {w n} { |
---|
858 | variable ::tk::Priv |
---|
859 | |
---|
860 | set i [$w index insert] |
---|
861 | scan $i "%d.%d" line char |
---|
862 | if {[string compare $Priv(prevPos) $i]} { |
---|
863 | set Priv(char) $char |
---|
864 | } |
---|
865 | set new [$w index [expr {$line + $n}].$Priv(char)] |
---|
866 | if {[$w compare $new == end] || [$w compare $new == "insert linestart"]} { |
---|
867 | set new $i |
---|
868 | } |
---|
869 | set Priv(prevPos) $new |
---|
870 | return $new |
---|
871 | } |
---|
872 | |
---|
873 | # ::tk::TextPrevPara -- |
---|
874 | # Returns the index of the beginning of the paragraph just before a given |
---|
875 | # position in the text (the beginning of a paragraph is the first non-blank |
---|
876 | # character after a blank line). |
---|
877 | # |
---|
878 | # Arguments: |
---|
879 | # w - The text window in which the cursor is to move. |
---|
880 | # pos - Position at which to start search. |
---|
881 | |
---|
882 | proc ::tk::TextPrevPara {w pos} { |
---|
883 | set pos [$w index "$pos linestart"] |
---|
884 | while {1} { |
---|
885 | if {([string equal [$w get "$pos - 1 line"] "\n"] \ |
---|
886 | && [string compare [$w get $pos] "\n"]) \ |
---|
887 | || [string equal $pos "1.0"]} { |
---|
888 | if {[regexp -indices {^[ ]+(.)} [$w get $pos "$pos lineend"] \ |
---|
889 | dummy index]} { |
---|
890 | set pos [$w index "$pos + [lindex $index 0] chars"] |
---|
891 | } |
---|
892 | if {[$w compare $pos != insert] || [string equal $pos 1.0]} { |
---|
893 | return $pos |
---|
894 | } |
---|
895 | } |
---|
896 | set pos [$w index "$pos - 1 line"] |
---|
897 | } |
---|
898 | } |
---|
899 | |
---|
900 | # ::tk::TextNextPara -- |
---|
901 | # Returns the index of the beginning of the paragraph just after a given |
---|
902 | # position in the text (the beginning of a paragraph is the first non-blank |
---|
903 | # character after a blank line). |
---|
904 | # |
---|
905 | # Arguments: |
---|
906 | # w - The text window in which the cursor is to move. |
---|
907 | # start - Position at which to start search. |
---|
908 | |
---|
909 | proc ::tk::TextNextPara {w start} { |
---|
910 | set pos [$w index "$start linestart + 1 line"] |
---|
911 | while {[string compare [$w get $pos] "\n"]} { |
---|
912 | if {[$w compare $pos == end]} { |
---|
913 | return [$w index "end - 1c"] |
---|
914 | } |
---|
915 | set pos [$w index "$pos + 1 line"] |
---|
916 | } |
---|
917 | while {[string equal [$w get $pos] "\n"]} { |
---|
918 | set pos [$w index "$pos + 1 line"] |
---|
919 | if {[$w compare $pos == end]} { |
---|
920 | return [$w index "end - 1c"] |
---|
921 | } |
---|
922 | } |
---|
923 | if {[regexp -indices {^[ ]+(.)} [$w get $pos "$pos lineend"] \ |
---|
924 | dummy index]} { |
---|
925 | return [$w index "$pos + [lindex $index 0] chars"] |
---|
926 | } |
---|
927 | return $pos |
---|
928 | } |
---|
929 | |
---|
930 | # ::tk::TextScrollPages -- |
---|
931 | # This is a utility procedure used in bindings for moving up and down |
---|
932 | # pages and possibly extending the selection along the way. It scrolls |
---|
933 | # the view in the widget by the number of pages, and it returns the |
---|
934 | # index of the character that is at the same position in the new view |
---|
935 | # as the insertion cursor used to be in the old view. |
---|
936 | # |
---|
937 | # Arguments: |
---|
938 | # w - The text window in which the cursor is to move. |
---|
939 | # count - Number of pages forward to scroll; may be negative |
---|
940 | # to scroll backwards. |
---|
941 | |
---|
942 | proc ::tk::TextScrollPages {w count} { |
---|
943 | set bbox [$w bbox insert] |
---|
944 | $w yview scroll $count pages |
---|
945 | if {[string equal $bbox ""]} { |
---|
946 | return [$w index @[expr {[winfo height $w]/2}],0] |
---|
947 | } |
---|
948 | return [$w index @[lindex $bbox 0],[lindex $bbox 1]] |
---|
949 | } |
---|
950 | |
---|
951 | # ::tk::TextTranspose -- |
---|
952 | # This procedure implements the "transpose" function for text widgets. |
---|
953 | # It tranposes the characters on either side of the insertion cursor, |
---|
954 | # unless the cursor is at the end of the line. In this case it |
---|
955 | # transposes the two characters to the left of the cursor. In either |
---|
956 | # case, the cursor ends up to the right of the transposed characters. |
---|
957 | # |
---|
958 | # Arguments: |
---|
959 | # w - Text window in which to transpose. |
---|
960 | |
---|
961 | proc ::tk::TextTranspose w { |
---|
962 | set pos insert |
---|
963 | if {[$w compare $pos != "$pos lineend"]} { |
---|
964 | set pos [$w index "$pos + 1 char"] |
---|
965 | } |
---|
966 | set new [$w get "$pos - 1 char"][$w get "$pos - 2 char"] |
---|
967 | if {[$w compare "$pos - 1 char" == 1.0]} { |
---|
968 | return |
---|
969 | } |
---|
970 | $w delete "$pos - 2 char" $pos |
---|
971 | $w insert insert $new |
---|
972 | $w see insert |
---|
973 | } |
---|
974 | |
---|
975 | # ::tk_textCopy -- |
---|
976 | # This procedure copies the selection from a text widget into the |
---|
977 | # clipboard. |
---|
978 | # |
---|
979 | # Arguments: |
---|
980 | # w - Name of a text widget. |
---|
981 | |
---|
982 | proc ::tk_textCopy w { |
---|
983 | if {![catch {set data [$w get sel.first sel.last]}]} { |
---|
984 | clipboard clear -displayof $w |
---|
985 | clipboard append -displayof $w $data |
---|
986 | } |
---|
987 | } |
---|
988 | |
---|
989 | # ::tk_textCut -- |
---|
990 | # This procedure copies the selection from a text widget into the |
---|
991 | # clipboard, then deletes the selection (if it exists in the given |
---|
992 | # widget). |
---|
993 | # |
---|
994 | # Arguments: |
---|
995 | # w - Name of a text widget. |
---|
996 | |
---|
997 | proc ::tk_textCut w { |
---|
998 | if {![catch {set data [$w get sel.first sel.last]}]} { |
---|
999 | clipboard clear -displayof $w |
---|
1000 | clipboard append -displayof $w $data |
---|
1001 | $w delete sel.first sel.last |
---|
1002 | } |
---|
1003 | } |
---|
1004 | |
---|
1005 | # ::tk_textPaste -- |
---|
1006 | # This procedure pastes the contents of the clipboard to the insertion |
---|
1007 | # point in a text widget. |
---|
1008 | # |
---|
1009 | # Arguments: |
---|
1010 | # w - Name of a text widget. |
---|
1011 | |
---|
1012 | proc ::tk_textPaste w { |
---|
1013 | global tcl_platform |
---|
1014 | if {![catch {::tk::GetSelection $w CLIPBOARD} sel]} { |
---|
1015 | set oldSeparator [$w cget -autoseparators] |
---|
1016 | if { $oldSeparator } { |
---|
1017 | $w configure -autoseparators 0 |
---|
1018 | $w edit separator |
---|
1019 | } |
---|
1020 | if {[string compare [tk windowingsystem] "x11"]} { |
---|
1021 | catch { $w delete sel.first sel.last } |
---|
1022 | } |
---|
1023 | $w insert insert $sel |
---|
1024 | if { $oldSeparator } { |
---|
1025 | $w edit separator |
---|
1026 | $w configure -autoseparators 1 |
---|
1027 | } |
---|
1028 | } |
---|
1029 | } |
---|
1030 | |
---|
1031 | # ::tk::TextNextWord -- |
---|
1032 | # Returns the index of the next word position after a given position in the |
---|
1033 | # text. The next word is platform dependent and may be either the next |
---|
1034 | # end-of-word position or the next start-of-word position after the next |
---|
1035 | # end-of-word position. |
---|
1036 | # |
---|
1037 | # Arguments: |
---|
1038 | # w - The text window in which the cursor is to move. |
---|
1039 | # start - Position at which to start search. |
---|
1040 | |
---|
1041 | if {[string equal $tcl_platform(platform) "windows"]} { |
---|
1042 | proc ::tk::TextNextWord {w start} { |
---|
1043 | TextNextPos $w [TextNextPos $w $start tcl_endOfWord] \ |
---|
1044 | tcl_startOfNextWord |
---|
1045 | } |
---|
1046 | } else { |
---|
1047 | proc ::tk::TextNextWord {w start} { |
---|
1048 | TextNextPos $w $start tcl_endOfWord |
---|
1049 | } |
---|
1050 | } |
---|
1051 | |
---|
1052 | # ::tk::TextNextPos -- |
---|
1053 | # Returns the index of the next position after the given starting |
---|
1054 | # position in the text as computed by a specified function. |
---|
1055 | # |
---|
1056 | # Arguments: |
---|
1057 | # w - The text window in which the cursor is to move. |
---|
1058 | # start - Position at which to start search. |
---|
1059 | # op - Function to use to find next position. |
---|
1060 | |
---|
1061 | proc ::tk::TextNextPos {w start op} { |
---|
1062 | set text "" |
---|
1063 | set cur $start |
---|
1064 | while {[$w compare $cur < end]} { |
---|
1065 | set text $text[$w get $cur "$cur lineend + 1c"] |
---|
1066 | set pos [$op $text 0] |
---|
1067 | if {$pos >= 0} { |
---|
1068 | ## Adjust for embedded windows and images |
---|
1069 | ## dump gives us 3 items per window/image |
---|
1070 | set dump [$w dump -image -window $start "$start + $pos c"] |
---|
1071 | if {[llength $dump]} { |
---|
1072 | set pos [expr {$pos + ([llength $dump]/3)}] |
---|
1073 | } |
---|
1074 | return [$w index "$start + $pos c"] |
---|
1075 | } |
---|
1076 | set cur [$w index "$cur lineend +1c"] |
---|
1077 | } |
---|
1078 | return end |
---|
1079 | } |
---|
1080 | |
---|
1081 | # ::tk::TextPrevPos -- |
---|
1082 | # Returns the index of the previous position before the given starting |
---|
1083 | # position in the text as computed by a specified function. |
---|
1084 | # |
---|
1085 | # Arguments: |
---|
1086 | # w - The text window in which the cursor is to move. |
---|
1087 | # start - Position at which to start search. |
---|
1088 | # op - Function to use to find next position. |
---|
1089 | |
---|
1090 | proc ::tk::TextPrevPos {w start op} { |
---|
1091 | set text "" |
---|
1092 | set cur $start |
---|
1093 | while {[$w compare $cur > 0.0]} { |
---|
1094 | set text [$w get "$cur linestart - 1c" $cur]$text |
---|
1095 | set pos [$op $text end] |
---|
1096 | if {$pos >= 0} { |
---|
1097 | ## Adjust for embedded windows and images |
---|
1098 | ## dump gives us 3 items per window/image |
---|
1099 | set dump [$w dump -image -window "$cur linestart" "$start - 1c"] |
---|
1100 | if {[llength $dump]} { |
---|
1101 | ## This is a hokey extra hack for control-arrow movement |
---|
1102 | ## that should be in a while loop to be correct (hobbs) |
---|
1103 | if {[$w compare [lindex $dump 2] > \ |
---|
1104 | "$cur linestart - 1c + $pos c"]} { |
---|
1105 | incr pos -1 |
---|
1106 | } |
---|
1107 | set pos [expr {$pos + ([llength $dump]/3)}] |
---|
1108 | } |
---|
1109 | return [$w index "$cur linestart - 1c + $pos c"] |
---|
1110 | } |
---|
1111 | set cur [$w index "$cur linestart - 1c"] |
---|
1112 | } |
---|
1113 | return 0.0 |
---|
1114 | } |
---|
1115 | |
---|
1116 | # ::tk::TextScanMark -- |
---|
1117 | # |
---|
1118 | # Marks the start of a possible scan drag operation |
---|
1119 | # |
---|
1120 | # Arguments: |
---|
1121 | # w - The text window from which the text to get |
---|
1122 | # x - x location on screen |
---|
1123 | # y - y location on screen |
---|
1124 | |
---|
1125 | proc ::tk::TextScanMark {w x y} { |
---|
1126 | $w scan mark $x $y |
---|
1127 | set ::tk::Priv(x) $x |
---|
1128 | set ::tk::Priv(y) $y |
---|
1129 | set ::tk::Priv(mouseMoved) 0 |
---|
1130 | } |
---|
1131 | |
---|
1132 | # ::tk::TextScanDrag -- |
---|
1133 | # |
---|
1134 | # Marks the start of a possible scan drag operation |
---|
1135 | # |
---|
1136 | # Arguments: |
---|
1137 | # w - The text window from which the text to get |
---|
1138 | # x - x location on screen |
---|
1139 | # y - y location on screen |
---|
1140 | |
---|
1141 | proc ::tk::TextScanDrag {w x y} { |
---|
1142 | # Make sure these exist, as some weird situations can trigger the |
---|
1143 | # motion binding without the initial press. [Bug #220269] |
---|
1144 | if {![info exists ::tk::Priv(x)]} { set ::tk::Priv(x) $x } |
---|
1145 | if {![info exists ::tk::Priv(y)]} { set ::tk::Priv(y) $y } |
---|
1146 | if {($x != $::tk::Priv(x)) || ($y != $::tk::Priv(y))} { |
---|
1147 | set ::tk::Priv(mouseMoved) 1 |
---|
1148 | } |
---|
1149 | if {[info exists ::tk::Priv(mouseMoved)] && $::tk::Priv(mouseMoved)} { |
---|
1150 | $w scan dragto $x $y |
---|
1151 | } |
---|
1152 | } |
---|