package LatexIndent::IfElseFi; # 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::GetYamlSettings qw/%masterSettings/; use LatexIndent::TrailingComments qw/$trailingCommentRegExp/; use LatexIndent::Switches qw/$is_m_switch_active $is_t_switch_active $is_tt_switch_active/; use LatexIndent::LogFile qw/$logger/; use LatexIndent::Heading qw/$allHeadingsRegexp/; use Data::Dumper; use Exporter qw/import/; our @ISA = "LatexIndent::Document"; # class inheritance, Programming Perl, pg 321 our @EXPORT_OK = qw/find_ifelsefi construct_ifelsefi_regexp $ifElseFiBasicRegExp/; our $ifElseFiCounter; our $ifElseFiRegExp; our $ifElseFiBasicRegExp = qr/\\if/; # store the regular expresssion for matching and replacing the \if...\else...\fi statements # note: we search for \else separately in an attempt to keep this regexp a little more managable sub construct_ifelsefi_regexp{ my $ifElseFiNameRegExp = qr/${${$masterSettings{fineTuning}}{ifElseFi}}{name}/; $ifElseFiRegExp = qr/ ( \\ ($ifElseFiNameRegExp) \h* (\R*) ) # begin statement, e.g \ifnum, \ifodd ( \\(?!if)|[0-9]|\R|\h|\#|!-!|$trailingCommentRegExp # up until a \\, linebreak # or !-!, which is ) # part of the tokens used for latexindent ( (?: (?!\\if). )*? # body, which can't include another \if ) (\R*) # linebreaks after body ( \\fi(?![a-zA-Z]) # \fi statement ) (\h*) # 0 or more horizontal spaces (\R)? # linebreaks after \fi /sx; } sub find_ifelsefi{ my $self = shift; while( ${$self}{body} =~ m/$ifElseFiRegExp\h*($trailingCommentRegExp)?/){ ${$self}{body} =~ s/ $ifElseFiRegExp(\h*)($trailingCommentRegExp)? / # create a new IfElseFi object my $ifElseFi = LatexIndent::IfElseFi->new(begin=>$1.(($4 eq "\n" and !$3)?"\n":q()), name=>$2, # if $4 is a line break, don't count it twice (it will already be in 'begin') body=>($4 eq "\n") ? $5.$6 : $4.$5.$6, end=>$7, linebreaksAtEnd=>{ begin=>(($4 eq "\n")||$3)?1:0, body=>$6?1:0, end=>$9?1:0, }, aliases=>{ # begin statements BeginStartsOnOwnLine=>"IfStartsOnOwnLine", # end statements EndStartsOnOwnLine=>"FiStartsOnOwnLine", # after end statements EndFinishesWithLineBreak=>"FiFinishesWithLineBreak", }, modifyLineBreaksYamlName=>"ifElseFi", endImmediatelyFollowedByComment=>$9?0:($11?1:0), horizontalTrailingSpace=>$8?$8:q(), ); # log file output $logger->trace("*IfElseFi found: $2")if $is_t_switch_active; # the settings and storage of most objects has a lot in common $self->get_settings_and_store_new_object($ifElseFi); ${@{${$self}{children}}[-1]}{replacementText}.($10?$10:q()).($11?$11:q()); /xse; } return; } sub post_indentation_check{ # needed to remove leading horizontal space before \else my $self = shift; # loop through \else and \or foreach ({regExp=>qr/\\else/},{regExp=>qr/\\or/}){ my %else = %{$_}; if(${$self}{body} =~ m/^\h*$else{regExp}/sm and !(${$self}{body} =~ m/^\h*$else{regExp}/s and ${$self}{linebreaksAtEnd}{begin}==0) ){ $logger->trace("*Adding surrounding indentation to $else{regExp} statement(s) ('${$self}{surroundingIndentation}')") if $is_t_switch_active; ${$self}{body} =~ s/^\h*($else{regExp})/${$self}{surroundingIndentation}$1/smg; } } return; } sub tasks_particular_to_each_object{ my $self = shift; # check for existence of \else statement, and associated line break information $self->check_for_else_statement( # else name regexp elseNameRegExp=>qr|\\else|, # else statements name ElseStartsOnOwnLine=>"ElseStartsOnOwnLine", # end statements ElseFinishesWithLineBreak=>"ElseFinishesWithLineBreak", # for the YAML settings storage storageNameAppend=>"else", # logfile information logName=>"else", ); # check for existence of \or statement, and associated line break information $self->check_for_else_statement( # else name regexp elseNameRegExp=>qr|\\or|, # else statements name ElseStartsOnOwnLine=>"OrStartsOnOwnLine", # end statements ElseFinishesWithLineBreak=>"OrFinishesWithLineBreak", # for the YAML settings storage storageNameAppend=>"or", # logfile information logName=>"or", ); # search for headings (important to do this before looking for commands!) $self->find_heading if ${$self}{body} =~ m/$allHeadingsRegexp/s; # search for commands and special code blocks $self->find_commands_or_key_equals_values_braces_and_special; } sub indent_begin{ my $self = shift; # line break checks after \if statement, can get messy if we # have, for example # \ifnum # something # which might be changed into # \ifnumsomething # which is undeserible if (defined ${$self}{BodyStartsOnOwnLine} and ${$self}{BodyStartsOnOwnLine}==-1 and ${$self}{body} !~ m/^(\h|\\|(?:!-!))/s ){ ${$self}{begin} .= " "; } } sub wrap_up_statement{ my $self = shift; # line break checks *after* \end{statement} if (defined ${$self}{EndFinishesWithLineBreak} and ${$self}{EndFinishesWithLineBreak}==-1 ) { # add a single horizontal space after the child id, otherwise we can end up # with things like # before: # \fi # text # after: # \fitext $logger->trace("*Adding a single space after \\fi statement (otherwise \\fi can be comined with next line of text in an unwanted way)") if $is_t_switch_active; ${$self}{end} =${$self}{end}." "; } $logger->trace("*Finished indenting ${$self}{name}") if $is_t_switch_active; return $self; } sub create_unique_id{ my $self = shift; $ifElseFiCounter++; ${$self}{id} = "$tokens{ifElseFi}$ifElseFiCounter"; return; } 1;