package LatexIndent::Check; # 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 Exporter qw/import/; use LatexIndent::LogFile qw/$logger/; use LatexIndent::Switches qw/$is_m_switch_active $is_check_verbose_switch_active/; our @ISA = "LatexIndent::Document"; # class inheritance, Programming Perl, pg 321 our @EXPORT_OK = qw/simple_diff/; sub simple_diff { my $self = shift; # simple diff... $logger->info("*simple diff: (check switch active)"); # check switch work below here if (${$self}{originalBody} eq ${$self}{body}){ $logger->info("no differences, no diff to report"); return; } # otherwise we loop through the old and new body, and make comparisons my @oldBody = split("\n",${$self}{originalBody}); my @newBody = split("\n",${$self}{body}); my @diff = (); # this loop stores the differences ... if($is_m_switch_active){ # if -m *is* active, then the number of lines in old and new may not be the same # so we need to go through the options my $maxLines = ($#oldBody >= $#newBody ? $#oldBody : $#newBody); # loop through to maxLines, accounting for the three scenarios: # # oldBody[lineCount] and newBody[lineCount] both defined # oldBody[lineCount] defined and newBody[lineCount] not defined # oldBody[lineCount] not defined and newBody[lineCount] defined # for (my $lineCount=0;$lineCount<=$maxLines;$lineCount++){ if ($lineCount<=$#oldBody and $lineCount<=$#newBody ){ if ($oldBody[$lineCount] ne $newBody[$lineCount]){ push(@diff,{old=>$oldBody[$lineCount],new=>$newBody[$lineCount],lineNumber=>$lineCount+1}); } } elsif ($lineCount<=$#oldBody) { push(@diff,{old=>$oldBody[$lineCount],lineNumber=>$lineCount+1}); } else { push(@diff,{new=>$newBody[$lineCount],lineNumber=>$lineCount+1}); } } } else { # if -m is not active, then the number of lines in old and new will be the same for (my $lineCount=0;$lineCount<=$#oldBody;$lineCount++){ if ($oldBody[$lineCount] ne $newBody[$lineCount]){ push(@diff,{old=>$oldBody[$lineCount],new=>$newBody[$lineCount],lineNumber=>$lineCount+1}); } } } # initialise the old and new tmp body for storage my $tmpOldBody = '-'; my $tmpNewBody = '+'; my $previousLineNumber = -1; # and the 'diff chunk' storage array my @diffChunks = (); my $diffChunkFirstLineNumber = ${$diff[0]}{lineNumber}; # ... and this loop combines the diffs into chunks for my $i (0..$#diff) { my $currentLineNumber = ${$diff[$i]}{lineNumber}; if ($i == $#diff or ( $previousLineNumber>=0 and $currentLineNumber>($previousLineNumber+1) )){ my $lastLine = ${$diff[$i-1]}{lineNumber}; if ($i == $#diff){ $lastLine = $currentLineNumber; $tmpOldBody .= ($tmpOldBody eq '-' ? q() : "\n-").${$diff[$i]}{old}; $tmpNewBody .= ($tmpNewBody eq '+' ? q() : "\n+").${$diff[$i]}{new}; } push(@diffChunks, {old=>$tmpOldBody, new=>$tmpNewBody, firstLine=>$diffChunkFirstLineNumber, lastLine=>$lastLine } ); $tmpOldBody = '-'.${$diff[$i]}{old} if defined ${$diff[$i]}{old}; $tmpNewBody = '+'.${$diff[$i]}{new} if defined ${$diff[$i]}{new}; $diffChunkFirstLineNumber = $currentLineNumber; } else { $tmpOldBody .= ($tmpOldBody eq '-' ? q() : "\n-").${$diff[$i]}{old} if defined ${$diff[$i]}{old}; $tmpNewBody .= ($tmpNewBody eq '+' ? q() : "\n+").${$diff[$i]}{new} if defined ${$diff[$i]}{new}; } $previousLineNumber = ${$diff[$i]}{lineNumber}; } # finally, output the diff chunks foreach (@diffChunks){ $logger->info("@@ ${$_}{firstLine} -- ${$_}{lastLine} @@"); $logger->info(${$_}{old}); $logger->info(${$_}{new}); # possibly output to terminal if($is_check_verbose_switch_active){ print "\n@@ ${$_}{firstLine} -- ${$_}{lastLine} @@\n"; print ${$_}{old},"\n"; print ${$_}{new},"\n"; } } } 1;