| 1 | #! perl |
1 | #! perl |
| 2 | |
2 | |
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3 | #:META:RESOURCE:%.pattern-0:string:first selection pattern |
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4 | |
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5 | =head1 NAME |
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6 | |
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7 | selection - more intelligent selection (enabled by default) |
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8 | |
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9 | =head1 DESCRIPTION |
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10 | |
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11 | This extension tries to be more intelligent when the user extends |
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12 | selections (double-click and further clicks). Right now, it tries to |
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13 | select words, urls and complete shell-quoted arguments, which is very |
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14 | convenient, too, if your F<ls> supports C<--quoting-style=shell>. |
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15 | |
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16 | A double-click usually selects the word under the cursor, further clicks |
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17 | will enlarge the selection. |
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18 | |
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19 | The selection works by trying to match a number of regexes and displaying |
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20 | them in increasing order of length. You can add your own regexes by |
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21 | specifying resources of the form: |
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22 | |
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23 | URxvt.selection.pattern-0: perl-regex |
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24 | URxvt.selection.pattern-1: perl-regex |
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25 | ... |
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26 | |
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27 | The index number (0, 1...) must not have any holes, and each regex must |
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28 | contain at least one pair of capturing parentheses, which will be used for |
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29 | the match. For example, the following adds a regex that matches everything |
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30 | between two vertical bars: |
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31 | |
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32 | URxvt.selection.pattern-0: \\|([^|]+)\\| |
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33 | |
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34 | Another example: Programs I use often output "absolute path: " at the |
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35 | beginning of a line when they process multiple files. The following |
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36 | pattern matches the filename (note, there is a single space at the very |
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37 | end): |
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38 | |
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39 | URxvt.selection.pattern-0: ^(/[^:]+):\ |
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40 | |
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41 | You can look at the source of the selection extension to see more |
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42 | interesting uses, such as parsing a line from beginning to end. |
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43 | |
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44 | This extension also offers following bindable keyboard commands: |
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45 | |
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46 | =over 4 |
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47 | |
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48 | =item rot13 |
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49 | |
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50 | Rot-13 the selection when activated. Used via keyboard trigger: |
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51 | |
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52 | URxvt.keysym.C-M-r: perl:selection:rot13 |
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53 | |
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54 | =back |
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55 | |
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56 | =cut |
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57 | |
| 3 | sub on_keyboard_command { |
58 | sub on_user_command { |
| 4 | my ($self, $cmd) = @_; |
59 | my ($self, $cmd) = @_; |
| 5 | |
60 | |
| 6 | $cmd eq "selection:rot13" |
61 | $cmd eq "selection:rot13" |
| 7 | and $self->selection (map { y/A-Za-z/N-ZA-Mn-za-m/; $_ } $self->selection); |
62 | and $self->selection (map { y/A-Za-z/N-ZA-Mn-za-m/; $_ } $self->selection); |
| 8 | |
63 | |
| 9 | () |
64 | () |
| 10 | } |
65 | } |
| 11 | |
66 | |
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67 | sub on_keyboard_dispatch { |
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68 | &on_user_command; |
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69 | } |
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70 | |
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71 | sub on_init { |
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72 | my ($self) = @_; |
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73 | |
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74 | if (defined (my $res = $self->resource ("cutchars"))) { |
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75 | $res = $self->locale_decode ($res); |
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76 | push @{ $self->{patterns} }, qr{\G [\Q$res\E[:space:]]* ([^\Q$res\E[:space:]]+) }x; |
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77 | } |
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78 | |
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79 | for (my $idx = 0; defined (my $res = $self->x_resource ("selection.pattern-$idx")); $idx++) { |
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80 | $res = $self->locale_decode ($res); |
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81 | push @{ $self->{patterns} }, qr/$res/; |
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82 | } |
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83 | |
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84 | $self->{enabled} = 1; |
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85 | |
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86 | push @{ $self->{term}{option_popup_hook} }, sub { |
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87 | ("new selection" => $self->{enabled}, sub { $self->{enabled} = shift }) |
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88 | }; |
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89 | |
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90 | () |
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91 | } |
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92 | |
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93 | # "find interesting things"-patterns |
| 12 | my @patterns = ( |
94 | my @mark_patterns = ( |
| 13 | # urls |
95 | # qr{ ([[:word:]]+) }x, |
| 14 | qr{ ([a-z0-9.+\-]+://[ab-zA-Z0-9\-\@;\/?:&=%\$_.+!*\x27(),]+) }x, |
96 | qr{ ([^[:space:]]+) }x, |
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97 | |
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98 | # common types of "parentheses" |
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99 | qr{ (?<![^[:space:]]) [`'] ([^`']+) [`'] (?![^[:space:]]) }x, |
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100 | qr{ (?<![^[:space:]]) ‘ ([^‘’]+) ’ (?![^[:space:]]) }x, |
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101 | qr{ (?<![^[:space:]]) “ ([^“”]+) ” (?![^[:space:]]) }x, |
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102 | |
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103 | qr{ (?<![^[:space:]]) (' [^[:space:]] [^']* ') }x, |
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104 | qr{ (' [^']* [^[:space:]] ') (?![^[:space:]]) }x, |
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105 | qr{ (?<![^[:space:]]) (` [^[:space:]] [^']* ') }x, |
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106 | qr{ (` [^']* [^[:space:]] ') (?![^[:space:]]) }x, |
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107 | qr{ (?<![^[:space:]]) (" [^[:space:]] [^"]* ") }x, |
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108 | qr{ (" [^"]* [^[:space:]] ") (?![^[:space:]]) }x, |
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109 | |
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110 | qr{ \{ ([^\{\}]+) \} }x, |
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111 | qr{ \( ([^\(\)]+) \) }x, |
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112 | qr{ \[ ([^\[\]]+) \] }x, |
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113 | qr{ \< ([^\<\>]+) \> }x, |
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114 | |
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115 | # urls, just a heuristic |
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116 | qr{( |
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117 | (?:https?://|ftp://|news://|mailto:|file://|\bwww\.)[ab-zA-Z0-9\-\@;\/?:&=%\$_.+!*\x27(),~#]+ |
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118 | [ab-zA-Z0-9\-\@;\/?:&=%\$_+*()~] # exclude some trailing characters (heuristic) |
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119 | )}x, |
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120 | |
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121 | # shell-like argument quoting, basically always matches |
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122 | qr{\G [\ \t|&;<>()]* ( |
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123 | (?: |
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124 | [^\\"'\ \t|&;<>()]+ |
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125 | | \\. |
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126 | | " (?: [^\\"]+ | \\. )* " |
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127 | | ' [^']* ' |
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128 | )+ |
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129 | )}x, |
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130 | ); |
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131 | |
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132 | # "correct obvious? crap"-patterns |
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133 | my @simplify_patterns = ( |
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134 | qr{^"([^\\"'\ \t|&;<>()*?]+)"$}, # "simple" => simple |
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135 | qr{^(.*)[,\-]$}, # strip off trailing , and - |
| 15 | ); |
136 | ); |
| 16 | |
137 | |
| 17 | sub on_sel_extend { |
138 | sub on_sel_extend { |
| 18 | my ($self) = @_; |
139 | my ($self, $time) = @_; |
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140 | |
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141 | $self->{enabled} |
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142 | or return; |
| 19 | |
143 | |
| 20 | my ($row, $col) = $self->selection_mark; |
144 | my ($row, $col) = $self->selection_mark; |
| 21 | my $line = $self->line ($row); |
145 | my $line = $self->line ($row); |
| 22 | my $offset = $line->offset_of ($row, $col); |
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| 23 | my $text = $line->t; |
146 | my $text = $line->t; |
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147 | my $markofs = $line->offset_of ($row, $col); |
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148 | my $curlen = $line->offset_of ($self->selection_end) |
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149 | - $line->offset_of ($self->selection_beg); |
| 24 | |
150 | |
| 25 | for my $regex (@patterns) { |
151 | my @matches; |
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152 | |
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153 | if ($markofs < $line->l) { |
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154 | study $text; # _really_ helps, too :) |
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155 | |
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156 | for my $regex (@mark_patterns, @{ $self->{patterns} }) { |
| 26 | while ($text =~ /$regex/g) { |
157 | while ($text =~ /$regex/g) { |
| 27 | if ($-[0] <= $offset and $offset <= $+[0]) { |
158 | if ($-[1] <= $markofs and $markofs <= $+[1]) { |
| 28 | $self->selection_beg ($line->coord_of ($-[0])); |
159 | my $ofs = $-[1]; |
| 29 | $self->selection_end ($line->coord_of ($+[0])); |
160 | my $match = $1; |
| 30 | return 1; |
161 | |
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162 | for my $regex (@simplify_patterns) { |
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163 | if ($match =~ $regex) { |
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164 | $match = $1; |
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165 | $ofs += $-[1]; |
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166 | } |
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167 | } |
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168 | |
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169 | push @matches, [$ofs, length $match]; |
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170 | } |
| 31 | } |
171 | } |
| 32 | } |
172 | } |
| 33 | } |
173 | } |
| 34 | |
174 | |
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175 | # whole line |
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176 | push @matches, [0, ($line->end - $line->beg + 1) * $self->ncol]; |
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177 | |
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178 | for (sort { $a->[1] <=> $b->[1] or $b->[0] <=> $a->[0] } @matches) { |
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179 | my ($ofs, $len) = @$_; |
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180 | |
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181 | next if $len <= $curlen; |
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182 | |
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183 | $self->selection_beg ($line->coord_of ($ofs)); |
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184 | $self->selection_end ($line->coord_of ($ofs + $len)); |
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185 | return 1; |
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186 | } |
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187 | |
| 35 | () |
188 | () |
| 36 | } |
189 | } |
