summaryrefslogtreecommitdiff
path: root/support/latexindent/LatexIndent/TrailingComments.pm
blob: 262201e76a059f70ab306e1fcdd3ba2182627cb3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
package LatexIndent::TrailingComments;
#	This program is free software: you can redistribute it and/or modify
#	it under the terms of the GNU General Public License as published by
#	the Free Software Foundation, either version 3 of the License, or
#	(at your option) any later version.
#
#	This program is distributed in the hope that it will be useful,
#	but WITHOUT ANY WARRANTY; without even the implied warranty of
#	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#	GNU General Public License for more details.
#
#	See http://www.gnu.org/licenses/.
#
#	Chris Hughes, 2017
#
#	For all communication, please visit: https://github.com/cmhughes/latexindent.pl
use strict;
use warnings;
use LatexIndent::Tokens qw/%tokens/;
use LatexIndent::Switches qw/$is_t_switch_active $is_tt_switch_active $is_m_switch_active/;
use LatexIndent::GetYamlSettings qw/%masterSettings/;
use LatexIndent::LogFile qw/$logger/;
use Data::Dumper;
use Exporter qw/import/;
our @EXPORT_OK = qw/remove_trailing_comments put_trailing_comments_back_in $trailingCommentRegExp add_comment_symbol construct_trailing_comment_regexp/;
our @trailingComments;
our $commentCounter = 0;
our $trailingCommentRegExp;

sub construct_trailing_comment_regexp{
    my  $notPreceededBy = qr/${${$masterSettings{fineTuning}}{trailingComments}}{notPreceededBy}/;

    $trailingCommentRegExp = qr/$notPreceededBy%$tokens{trailingComment}\d+$tokens{endOfToken}/;
}

sub add_comment_symbol{
    # add a trailing comment token after, for example, a square brace [
    # or a curly brace { when, for example, BeginStartsOnOwnLine == 2
    my $self = shift;

    # increment the comment counter
    $commentCounter++;

    # store the comment -- without this, it won't get processed correctly at the end
    push(@trailingComments,{id=>$tokens{trailingComment}.$commentCounter.$tokens{endOfToken},value=>q()});

    # log file info
    $logger->trace("*Updating trailing comment array")if $is_t_switch_active;
    $logger->trace(Dumper(\@trailingComments),'ttrace') if($is_tt_switch_active);

    # the returned value
    return $tokens{trailingComment}.$commentCounter.$tokens{endOfToken};
}

sub remove_trailing_comments{
    my $self = shift;
    $logger->trace("*Storing trailing comments")if $is_t_switch_active;

    my  $notPreceededBy = qr/${${$masterSettings{fineTuning}}{trailingComments}}{notPreceededBy}/;

    # perform the substitution
    ${$self}{body} =~ s/
                            $notPreceededBy  # not preceeded by a \
                            %        # % 
                            (
                                \h*? # followed by possible horizontal space
                                .*?  # and anything else
                            )
                            $        # up to the end of a line
                        /   
                            # increment comment counter and store comment
                            $commentCounter++;
                            push(@trailingComments,{id=>$tokens{trailingComment}.$commentCounter.$tokens{endOfToken},value=>$1});

                            # replace comment with dummy text
                            "%".$tokens{trailingComment}.$commentCounter.$tokens{endOfToken};
                       /xsmeg;
    if(@trailingComments){
        $logger->trace("Trailing comments stored in:") if($is_tt_switch_active);
        $logger->trace(Dumper(\@trailingComments)) if($is_tt_switch_active);
    } else {
        $logger->trace("No trailing comments found") if($is_t_switch_active);
    }
    return;
}

sub put_trailing_comments_back_in{
    my $self = shift;
    return unless( @trailingComments > 0 );

    $logger->trace("*Returning trailing comments to body")if $is_t_switch_active;

    # loop through trailing comments in reverse so that, for example, 
    # latexindenttrailingcomment1 doesn't match the first 
    # part of latexindenttrailingcomment18, which would result in an 8 left over (bad)
    while( my $comment = pop @trailingComments){
      my $trailingcommentID = ${$comment}{id};
      my $trailingcommentValue = ${$comment}{value};

      # the -m switch can modify max characters per line, and trailing comment IDs can 
      # be split across lines
      if($is_m_switch_active and ${$self}{body} !~ m/%$trailingcommentID/m){
            $logger->trace("$trailingcommentID not found in body using /m matching, assuming it has been split across line (see modifyLineBreaks: textWrapOptions)") if($is_t_switch_active);
            my $trailingcommentIDwithLineBreaks;
            
            # construct a reg exp that contains possible line breaks in between each character
            if(${$masterSettings{modifyLineBreaks}{textWrapOptions}}{separator} ne ''){
                $trailingcommentIDwithLineBreaks = join("\\".${$masterSettings{modifyLineBreaks}{textWrapOptions}}{separator}."?",split(//,$trailingcommentID));
            } else {
                $trailingcommentIDwithLineBreaks = join("(?:\\h|\\R)*",split(//,$trailingcommentID));
            }
            my $trailingcommentIDwithLineBreaksRegExp = qr/$trailingcommentIDwithLineBreaks/s;  

            # replace the line-broken trailing comment ID with a non-broken trailing comment ID
            ${$self}{body} =~ s/%\R?$trailingcommentIDwithLineBreaksRegExp/%$trailingcommentID/s;
      }
      my  $notPreceededBy = qr/${${$masterSettings{fineTuning}}{trailingComments}}{notPreceededBy}/;
      if(${$self}{body} =~ m/%$trailingcommentID
                              (
                                  (?!                  # not immediately preceeded by 
                                      $notPreceededBy  # \
                                      %                # %
                                  ).*?
                              )                        # captured into $1
                              (\h*)?$                
                          /mx and $1 ne ''){
          $logger->trace("Comment not at end of line $trailingcommentID, moving it to end of line")if $is_t_switch_active;
          ${$self}{body} =~ s/%$trailingcommentID(.*)$/$1%$trailingcommentValue/m;
      } else {
          ${$self}{body} =~ s/%$trailingcommentID/%$trailingcommentValue/;
      }
      $logger->trace("replace %$trailingcommentID with %$trailingcommentValue") if($is_tt_switch_active);
    }
    return;
}

1;