summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/scripts/latexindent/LatexIndent/GetYamlSettings.pm
blob: addcdaf3f179632750e68425af360fcc9ef4cc50 (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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
package LatexIndent::GetYamlSettings;
#	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::Switches qw/%switches $is_m_switch_active $is_t_switch_active $is_tt_switch_active/;
use YAML::Tiny;                # interpret defaultSettings.yaml and other potential settings files
use File::Basename;            # to get the filename and directory path
use File::HomeDir;
use Log::Log4perl qw(get_logger :levels);
use Exporter qw/import/;
our @EXPORT_OK = qw/yaml_read_settings yaml_modify_line_breaks_settings yaml_get_indentation_settings_for_this_object yaml_poly_switch_get_every_or_custom_value yaml_get_indentation_information yaml_get_object_attribute_for_indentation_settings yaml_alignment_at_ampersand_settings yaml_get_textwrap_removeparagraphline_breaks %masterSettings yaml_get_columns/;

# Read in defaultSettings.YAML file
our $defaultSettings;

# master yaml settings is a hash, global to this module
our %masterSettings;

# previously found settings is a hash, global to this module
our %previouslyFoundSettings;

# default values for align at ampersand routine
our @alignAtAmpersandInformation = (   {name=>"lookForAlignDelims",yamlname=>"delims",default=>1},
                                       {name=>"alignDoubleBackSlash",default=>1},
                                       {name=>"spacesBeforeDoubleBackSlash",default=>1},
                                       {name=>"multiColumnGrouping",default=>0},
                                       {name=>"alignRowsWithoutMaxDelims",default=>1},
                                       {name=>"spacesBeforeAmpersand",default=>1},
                                       {name=>"spacesAfterAmpersand",default=>1},
                                       {name=>"justification",default=>"left"},
                                       {name=>"alignFinalDoubleBackSlash",default=>0},
                                       {name=>"dontMeasure",default=>0},
                                       {name=>"delimiterRegEx",default=>"(?<!\\\\)(&)"},
                                       {name=>"delimiterJustification",default=>"left"},
                                        );
    
sub yaml_read_settings{
  my $self = shift;
  
  # read the default settings
  $defaultSettings = YAML::Tiny->read( "$FindBin::RealBin/defaultSettings.yaml" ) if ( -e "$FindBin::RealBin/defaultSettings.yaml" );

  # grab the logger object
  my $logger = get_logger("Document");
  $logger->info("*YAML settings read: defaultSettings.yaml\nReading defaultSettings.yaml from $FindBin::RealBin/defaultSettings.yaml");
  
  # if latexindent.exe is invoked from TeXLive, then defaultSettings.yaml won't be in 
  # the same directory as it; we need to navigate to it
  if(!$defaultSettings) {
    $defaultSettings = YAML::Tiny->read( "$FindBin::RealBin/../../texmf-dist/scripts/latexindent/defaultSettings.yaml");
    $logger->info("Reading defaultSettings.yaml (2nd attempt, TeXLive, Windows) from $FindBin::RealBin/../../texmf-dist/scripts/latexindent/defaultSettings.yaml");
  }

  # need to exit if we can't get defaultSettings.yaml
  die "Could not open defaultSettings.yaml" if(!$defaultSettings);
   
  # master yaml settings is a hash, global to this module
  our %masterSettings = %{$defaultSettings->[0]};

  # scalar to read user settings
  my $userSettings;

  # array to store the paths to user settings
  my @absPaths;
  
  # we'll need the home directory a lot in what follows
  my $homeDir = File::HomeDir->my_home; 
  $logger->info("*YAML settings read: indentconfig.yaml or .indentconfig.yaml") unless $switches{onlyDefault};
  
  # get information about user settings- first check if indentconfig.yaml exists
  my $indentconfig = "$homeDir/indentconfig.yaml";

  # if indentconfig.yaml doesn't exist, check for the hidden file, .indentconfig.yaml
  $indentconfig = "$homeDir/.indentconfig.yaml" if(! -e $indentconfig);

  # messages for indentconfig.yaml and/or .indentconfig.yaml
  if ( -e $indentconfig and !$switches{onlyDefault}) {
        # read the absolute paths from indentconfig.yaml
        $userSettings = YAML::Tiny->read( "$indentconfig" );

        # update the absolute paths
        if($userSettings and (ref($userSettings->[0]) eq 'HASH') and $userSettings->[0]->{paths}){
            $logger->info("Reading path information from $indentconfig");
            # if both indentconfig.yaml and .indentconfig.yaml exist
            if ( -e File::HomeDir->my_home . "/indentconfig.yaml" and  -e File::HomeDir->my_home . "/.indentconfig.yaml") {
                  $logger->info("$homeDir/.indentconfig.yaml has been found, but $indentconfig takes priority");
            } elsif ( -e File::HomeDir->my_home . "/indentconfig.yaml" ) {
                  $logger->info("(Alternatively $homeDir/.indentconfig.yaml can be used)");
            } elsif ( -e File::HomeDir->my_home . "/.indentconfig.yaml" ) {
                  $logger->info("(Alternatively $homeDir/indentconfig.yaml can be used)");
            }
            
            # output the contents of indentconfig to the log file
            $logger->info(Dump \%{$userSettings->[0]});
        
            @absPaths = @{$userSettings->[0]->{paths}};
        } else {
            $logger->warn("*The paths field cannot be read from $indentconfig; this means it is either empty or contains invalid YAML");
            $logger->warn("See https://latexindentpl.readthedocs.io/en/latest/sec-indent-config-and-settings.html for an example");
        }
  } else {
     if($switches{onlyDefault}) {
        $logger->info("*-d switch active: only default settings requested");
        $logger->info("not reading USER settings from $indentconfig") if (-e $indentconfig);
        $logger->info("Ignoring the -l switch: $switches{readLocalSettings} (you used the -d switch)") if($switches{readLocalSettings});
        $logger->info("Ignoring the -y switch: $switches{yaml} (you used the -d switch)") if($switches{yaml});
        $switches{readLocalSettings}=0;
        $switches{yaml}=0;
     } else {
       # give the user instructions on where to put indentconfig.yaml or .indentconfig.yaml
       $logger->info("Home directory is $homeDir (didn't find either indentconfig.yaml or .indentconfig.yaml)\nTo specify user settings you would put indentconfig.yaml here: $homeDir/indentconfig.yaml\nAlternatively, you can use the hidden file .indentconfig.yaml as: $homeDir/.indentconfig.yaml");
     }
  }


  # local settings can be called with a + symbol, for example
  #     -l=+myfile.yaml
  #     -l "+ myfile.yaml"
  #     -l=myfile.yaml+
  # which translates to, respectively
  #     -l=localSettings.yaml,myfile.yaml
  #     -l=myfile.yaml,localSettings.yaml
  # Note: the following is *not allowed*:
  #     -l+myfile.yaml
  # and
  #     -l + myfile.yaml
  # will *only* load localSettings.yaml, and myfile.yaml will be ignored
  my @localSettings;

  $logger->info("*YAML settings read: -l switch") if $switches{readLocalSettings};

  # remove leading, trailing, and intermediate space
  $switches{readLocalSettings} =~ s/^\h*//g;
  $switches{readLocalSettings} =~ s/\h*$//g;
  $switches{readLocalSettings} =~ s/\h*,\h*/,/g;
  if($switches{readLocalSettings} =~ m/\+/){
        $logger->info("+ found in call for -l switch: will add localSettings.yaml");

        # + can be either at the beginning or the end, which determines if where the comma should go
        my $commaAtBeginning = ($switches{readLocalSettings} =~ m/^\h*\+/ ? q() : ",");
        my $commaAtEnd = ($switches{readLocalSettings} =~ m/^\h*\+/ ? "," : q());
        $switches{readLocalSettings} =~ s/\h*\+\h*/$commaAtBeginning."localSettings.yaml".$commaAtEnd/e; 
        $logger->info("New value of -l switch: $switches{readLocalSettings}");
  }

  # local settings can be separated by ,
  # e.g  
  #     -l = myyaml1.yaml,myyaml2.yaml
  # and in which case, we need to read them all
  if($switches{readLocalSettings} =~ m/,/){
        $logger->info("Multiple localSettings found, separated by commas:");
        @localSettings = split(/,/,$switches{readLocalSettings});
        $logger->info(join(', ',@localSettings));
  } else {
    push(@localSettings,$switches{readLocalSettings}) if($switches{readLocalSettings});
  }

  # add local settings to the paths, if appropriate
  foreach (@localSettings) {
    # check for an extension (.yaml)
    my ($name, $dir , $ext) = fileparse($_, "yaml");

    # if no extension is found, append the current localSetting with .yaml
    $_ = $_.($_=~m/\.\z/ ? q() : ".")."yaml" if(!$ext);

    # if the -l switch is called on its own, or else with +
    # and latexindent.pl is called from a different directory, then
    # we need to account for this
    if($_ eq "localSettings.yaml"){
        $_ = dirname (${$self}{fileName})."/".$_;
    }

    # check for existence and non-emptiness
    if ( (-e $_) and !(-z $_)) {
        $logger->info("Adding $_ to YAML read paths");
        push(@absPaths,"$_");
    } elsif ( !(-e $_) ) {
        $logger->warn("*yaml file not found: $_ not found. Proceeding without it.");
    }
  }

  # heading for the log file
  $logger->info("*YAML settings, reading from the following files:") if @absPaths;

  # read in the settings from each file
  foreach my $settings (@absPaths) {
    # check that the settings file exists and that it isn't empty
    if (-e $settings and !(-z $settings)) {
        $logger->info("Reading USER settings from $settings");
        $userSettings = YAML::Tiny->read( "$settings" );
  
        # if we can read userSettings
        if($userSettings) {
              # update the MASTER setttings to include updates from the userSettings
              while(my($firstLevelKey, $firstLevelValue) = each %{$userSettings->[0]}) {
                      # the update approach is slightly different for hashes vs scalars/arrays
                      if (ref($firstLevelValue) eq "HASH") {
                          while(my ($secondLevelKey,$secondLevelValue) = each %{$userSettings->[0]{$firstLevelKey}}) {
                            if (ref $secondLevelValue eq "HASH"){
                                # if masterSettings already contains a *scalar* value in secondLevelKey
                                # then we need to delete it (test-cases/headings-first.tex with indentRules1.yaml first demonstrated this)
                                if(ref $masterSettings{$firstLevelKey}{$secondLevelKey} ne "HASH"){
                                    $logger->trace("*masterSettings{$firstLevelKey}{$secondLevelKey} currently contains a *scalar* value, but it needs to be updated with a hash (see $settings); deleting the scalar") if($is_t_switch_active);
                                    delete $masterSettings{$firstLevelKey}{$secondLevelKey} ;
                                }
                                while(my ($thirdLevelKey,$thirdLevelValue) = each %{$secondLevelValue}) {
                                    if (ref $thirdLevelValue eq "HASH"){
                                        # similarly for third level
                                        if (ref $masterSettings{$firstLevelKey}{$secondLevelKey}{$thirdLevelKey} ne "HASH"){
                                            $logger->trace("*masterSettings{$firstLevelKey}{$secondLevelKey}{$thirdLevelKey} currently contains a *scalar* value, but it needs to be updated with a hash (see $settings); deleting the scalar") if($is_t_switch_active);
                                            delete $masterSettings{$firstLevelKey}{$secondLevelKey}{$thirdLevelKey} ;
                                        }
                                        while(my ($fourthLevelKey,$fourthLevelValue) = each %{$thirdLevelValue}) {
                                            $masterSettings{$firstLevelKey}{$secondLevelKey}{$thirdLevelKey}{$fourthLevelKey} = $fourthLevelValue;
                                        }
                                    } else {
                                        $masterSettings{$firstLevelKey}{$secondLevelKey}{$thirdLevelKey} = $thirdLevelValue;
                                    }
                                }
                            } else {
                                # settings such as commandCodeBlocks can have arrays, which may wish 
                                # to be amalgamated, rather than overwritten
                                if(ref($secondLevelValue) eq "ARRAY" 
                                    and 
                                   ${${$masterSettings{$firstLevelKey}{$secondLevelKey}}[0]}{amalgamate}
                                    and
                                   !(ref(${$secondLevelValue}[0]) eq "HASH" and defined ${$secondLevelValue}[0]{amalgamate} and !${$secondLevelValue}[0]{amalgamate}) 
                                 ){
                                    $logger->trace("*$firstLevelKey -> $secondLevelKey, amalgamate: 1") if($is_t_switch_active);
                                    foreach (@{$secondLevelValue}){
                                        $logger->trace("$_") if($is_t_switch_active);
                                        push (@{$masterSettings{$firstLevelKey}{$secondLevelKey}},$_) unless(ref($_) eq "HASH");
                                    }

                                    # remove duplicated entries, https://stackoverflow.com/questions/7651/how-do-i-remove-duplicate-items-from-an-array-in-perl
                                    my %seen = ();
                                    my @unique = grep { ! $seen{ $_ }++ } @{$masterSettings{$firstLevelKey}{$secondLevelKey}};
                                    @{$masterSettings{$firstLevelKey}{$secondLevelKey}} = @unique; 

                                    $logger->trace("*master settings for $firstLevelKey -> $secondLevelKey now look like:") if $is_t_switch_active;
                                    foreach (@{$masterSettings{$firstLevelKey}{$secondLevelKey}}){
                                        $logger->trace("$_") if($is_t_switch_active);
                                    }
                                } else {
                                    $masterSettings{$firstLevelKey}{$secondLevelKey} = $secondLevelValue;
                                }
                            }
                          }
                      } elsif (ref($firstLevelValue) eq "ARRAY") {
                            # update amalgamate in master settings
                            if(ref(${$firstLevelValue}[0]) eq "HASH" and defined ${$firstLevelValue}[0]{amalgamate}){
                               ${$masterSettings{$firstLevelKey}[0]}{amalgamate} = ${$firstLevelValue}[0]{amalgamate};
                               shift @{$firstLevelValue} if ${$masterSettings{$firstLevelKey}[0]}{amalgamate};
                            }

                            # if amalgamate is set to 1, then append
                            if(${$masterSettings{$firstLevelKey}[0]}{amalgamate}){
                                # loop through the other settings
                                foreach (@{$firstLevelValue}){
                                    push (@{$masterSettings{$firstLevelKey}},$_);
                                }
                            } else {
                                # otherwise overwrite
                                $masterSettings{$firstLevelKey} = $firstLevelValue;
                            }
                      } else {
                            $masterSettings{$firstLevelKey} = $firstLevelValue;
                      }
              }

              # output settings to $logfile
              if($masterSettings{logFilePreferences}{showEveryYamlRead}){
                  $logger->info(Dump \%{$userSettings->[0]});
              } else {
                  $logger->info("Not showing settings in the log file (see showEveryYamlRead and showAmalgamatedSettings).");
              }
         } else {
               # otherwise print a warning that we can not read userSettings.yaml
               $logger->warn("*$settings contains invalid yaml format- not reading from it");
         }
    } else {
        # otherwise keep going, but put a warning in the log file
        $logger->warn("*$homeDir/indentconfig.yaml");
        if (-z $settings) {
            $logger->info("specifies $settings but this file is EMPTY -- not reading from it");
        } else {
            $logger->info("specifies $settings but this file does not exist - unable to read settings from this file");
        }
    }
  }

  # read settings from -y|--yaml switch
  if($switches{yaml}){
        # report to log file
        $logger->info("*YAML settings read: -y switch");

        # remove any horizontal space before or after , OR : OR ; or at the beginning or end of the switch value
        $switches{yaml} =~ s/\h*(,|(?<!\\):|;)\h*/$1/g;
        $switches{yaml} =~ s/^\h*//g;

        # store settings, possibly multiple ones split by commas
        my @yamlSettings;
        if($switches{yaml} =~ m/(?<!\\),/){
            @yamlSettings = split(/(?<!\\),/,$switches{yaml});
        } else {
            push(@yamlSettings,$switches{yaml});
        }

        # it is possible to specify, for example,
        #
        #   -y=indentAfterHeadings:paragraph:indentAfterThisHeading:1;level:1
        #   -y=specialBeginEnd:displayMath:begin:'\\\[';end: '\\\]';lookForThis: 1
        #
        # which should be translated into
        #
        #   indentAfterHeadings:
        #       paragraph:
        #           indentAfterThisHeading:1
        #           level:1
        #
        # so we need to loop through the comma separated list and search 
        # for semi-colons
        my $settingsCounter=0;
        my @originalYamlSettings = @yamlSettings;
        foreach(@originalYamlSettings){
            # increment the counter
            $settingsCounter++;

            # check for a match of the ;
            if($_ =~ m/(?<!\\);/){
                my (@subfield) = split(/(?<!\\);/,$_);

                # the content up to the first ; is called the 'root'
                my $root = shift @subfield;

                # split the root at :
                my (@keysValues) = split(/:/,$root);

                # get rid of the last *two* elements, which will be 
                #   key: value
                # for example, in
                #   -y=indentAfterHeadings:paragraph:indentAfterThisHeading:1;level:1
                # then @keysValues holds
                #   indentAfterHeadings:paragraph:indentAfterThisHeading:1
                # so we need to get rid of both
                #    1
                #    indentAfterThisHeading
                # so that we are in a position to concatenate
                #   indentAfterHeadings:paragraph
                # with 
                #   level:1
                # to form
                #   indentAfterHeadings:paragraph:level:1
                pop(@keysValues);
                pop(@keysValues);

                # update the appropriate piece of the -y switch, for example:
                #   -y=indentAfterHeadings:paragraph:indentAfterThisHeading:1;level:1
                # needs to be changed to
                #   -y=indentAfterHeadings:paragraph:indentAfterThisHeading:1
                # the 
                #   indentAfterHeadings:paragraph:level:1
                # will be added in the next part
                $yamlSettings[$settingsCounter-1] = $root;

                # reform the root
                $root = join(":",@keysValues);
                $logger->trace("*Sub-field detected (; present) and the root is: $root") if $is_t_switch_active;

                # now we need to attach the $root back together with any subfields
                foreach(@subfield){
                   # splice the new field into @yamlSettings (reference: https://perlmaven.com/splice-to-slice-and-dice-arrays-in-perl)
                   splice @yamlSettings,$settingsCounter,0,$root.":".$_; 
                   
                   # increment the counter
                   $settingsCounter++;
                }
                $logger->info("-y switch value interpreted as: ".join(',',@yamlSettings));
            }
        }

        # loop through each of the settings specified in the -y switch
        foreach(@yamlSettings){
            # split each value at semi-colon
            my (@keysValues) = split(/(?<!(?:\\|\[)):(?!\])/,$_);

            # $value will always be the last element
            my $value = $keysValues[-1];

            # it's possible that the 'value' will contain an escaped
            # semi-colon, so we replace it with just a semi-colon
            $value =~ s/\\:/:/;

            # horizontal space needs special treatment
            if($value =~ m/^(?:"|')(\h*)(?:"|')$/){
                # pure horizontal space
                $value = $1;
            } elsif($value =~ m/^(?:"|')((?:\\t)*)(?:"|')$/){
                # tabs
                $value =~ s/^(?:"|')//;
                $value =~ s/(?:"|')$//;
                $value =~ s/\\t/\t/g;
            }

            if(scalar(@keysValues) == 2){
                # for example, -y="defaultIndent: ' '"
                my $key = $keysValues[0];
                $logger->info("Updating masterSettings with $key: $value");
                $masterSettings{$key} = $value;
            } elsif(scalar(@keysValues) == 3){
                # for example, -y="indentRules: one: '\t\t\t\t'"
                my $parent = $keysValues[0];
                my $child = $keysValues[1];
                $logger->info("Updating masterSettings with $parent: $child: $value");
                $masterSettings{$parent}{$child} = $value;
            } elsif(scalar(@keysValues) == 4){
                # for example, -y='modifyLineBreaks  :  environments: EndStartsOnOwnLine:3' -m
                my $parent = $keysValues[0];
                my $child = $keysValues[1];
                my $grandchild = $keysValues[2];
                $logger->info("Updating masterSettings with $parent: $child: $grandchild: $value");
                $masterSettings{$parent}{$child}{$grandchild} = $value;
            } elsif(scalar(@keysValues) == 5){
                # for example, -y='modifyLineBreaks  :  environments: one: EndStartsOnOwnLine:3' -m
                my $parent = $keysValues[0];
                my $child = $keysValues[1];
                my $grandchild = $keysValues[2];
                my $greatgrandchild = $keysValues[3];
                $logger->info("Updating masterSettings with $parent: $child: $grandchild: $greatgrandchild: $value");
                $masterSettings{$parent}{$child}{$grandchild}{$greatgrandchild} = $value;
            }
          }
  }

  # some users may wish to see showAmalgamatedSettings
  # which details the overall state of the settings modified
  # from the default in various user files
  if($masterSettings{logFilePreferences}{showAmalgamatedSettings}){
      $logger->info("Amalgamated/overall settings to be used:");
      $logger->info(Dump \%masterSettings);
  }

  return;
}

sub yaml_get_indentation_settings_for_this_object{
    my $self = shift;

    # create a name for previously found settings
    my $storageName = ${$self}{name}.${$self}{modifyLineBreaksYamlName}.(defined ${$self}{storageNameAppend}?${$self}{storageNameAppend}:q());

    # grab the logging object
    my $logger = get_logger("Document");

    # check for storage of repeated objects
    if ($previouslyFoundSettings{$storageName}){
        $logger->trace("*Using stored settings for $storageName") if($is_t_switch_active);
    } else {
        my $name = ${$self}{name};
        $logger->trace("Storing settings for $storageName") if($is_t_switch_active);

        # check for noAdditionalIndent and indentRules
        # otherwise use defaultIndent
        my $indentation = $self->yaml_get_indentation_information;

        # check for alignment at ampersand settings
        $self->yaml_alignment_at_ampersand_settings;

        # check for line break settings
        $self->yaml_modify_line_breaks_settings if $is_m_switch_active;

        # store the settings
        %{${previouslyFoundSettings}{$storageName}} = (
                        indentation=>$indentation,
                        BeginStartsOnOwnLine=>${$self}{BeginStartsOnOwnLine},
                        BodyStartsOnOwnLine=>${$self}{BodyStartsOnOwnLine},
                        EndStartsOnOwnLine=>${$self}{EndStartsOnOwnLine},
                        EndFinishesWithLineBreak=>${$self}{EndFinishesWithLineBreak},
                        removeParagraphLineBreaks=>${$self}{removeParagraphLineBreaks},
                        textWrapOptions=>${$self}{textWrapOptions},
                        columns=>${$self}{columns},
                      );

        # don't forget alignment settings!
        foreach (@alignAtAmpersandInformation){
            ${${previouslyFoundSettings}{$storageName}}{${$_}{name}} = ${$self}{${$_}{name}} if(defined ${$self}{${$_}{name}});
        } 

        # some objects, e.g ifElseFi, can have extra assignments, e.g ElseStartsOnOwnLine
        # these need to be stored as well!
        foreach (@{${$self}{additionalAssignments}}){
            ${${previouslyFoundSettings}{$storageName}}{$_} = ${$self}{$_};
        }

        # log file information
        $logger->trace("Settings for $name (stored for future use):") if $is_tt_switch_active;
        $logger->trace(Dump \%{${previouslyFoundSettings}{$storageName}}) if $is_tt_switch_active;

    }

    # append indentation settings to the current object
    while( my ($key,$value)= each %{${previouslyFoundSettings}{$storageName}}){
            ${$self}{$key} = $value;
    }

    return;
}

sub yaml_alignment_at_ampersand_settings{
    my $self = shift;

    # if the YamlName is, for example, optionalArguments, mandatoryArguments, heading, then we'll be looking for information about the *parent*
    my $name = (defined ${$self}{nameForIndentationSettings}) ? ${$self}{nameForIndentationSettings} : ${$self}{name};

    # check, for example,
    #   lookForAlignDelims:
    #      tabular: 1
    # or
    #
    #   lookForAlignDelims:
    #      tabular: 
    #         delims: 1
    #         alignDoubleBackSlash: 1
    #         spacesBeforeDoubleBackSlash: 2
    return unless ${$masterSettings{lookForAlignDelims}}{$name}; 

    if(ref ${$masterSettings{lookForAlignDelims}}{$name} eq "HASH"){
      # specified as a hash, e.g
      #
      #   lookForAlignDelims:
      #      tabular: 
      #         delims: 1
      #         alignDoubleBackSlash: 1
      #         spacesBeforeDoubleBackSlash: 2
      foreach (@alignAtAmpersandInformation){
          my $yamlname = (defined ${$_}{yamlname} ? ${$_}{yamlname}: ${$_}{name});
          ${$self}{${$_}{name}} = (defined ${${$masterSettings{lookForAlignDelims}}{$name}}{$yamlname} ) ? ${${$masterSettings{lookForAlignDelims}}{$name}}{$yamlname} : ${$_}{default};
      } 
    } else {
      # specified as a scalar, e.g
      #
      #   lookForAlignDelims:
      #      tabular: 1
      foreach (@alignAtAmpersandInformation){
          ${$self}{${$_}{name}} = ${$_}{default};
      } 
    }
    return;
}

sub yaml_modify_line_breaks_settings{
    my $self = shift;

    # grab the logging object
    my $logger = get_logger("Document");

    # details to the log file
    $logger->trace("*-m modifylinebreaks switch active") if $is_t_switch_active;
    $logger->trace("looking for polyswitch, textWrapOptions, removeParagraphLineBreaks, oneSentencePerLine settings for ${$self}{name} ") if $is_t_switch_active;

    # some objects, e.g ifElseFi, can have extra assignments, e.g ElseStartsOnOwnLine
    my @toBeAssignedTo = ${$self}{additionalAssignments} ? @{${$self}{additionalAssignments}} : ();

    # the following will *definitley* be in the array, so let's add them
    push(@toBeAssignedTo,("BeginStartsOnOwnLine","BodyStartsOnOwnLine","EndStartsOnOwnLine","EndFinishesWithLineBreak"));

    # we can efficiently loop through the following
    foreach (@toBeAssignedTo){
                    $self->yaml_poly_switch_get_every_or_custom_value(
                                    toBeAssignedTo=>$_,
                                    toBeAssignedToAlias=> ${$self}{aliases}{$_} ?  ${$self}{aliases}{$_} : $_,
                                  );
      };

    $self->yaml_get_textwrap_removeparagraphline_breaks;
    return;
}

sub yaml_get_textwrap_removeparagraphline_breaks{
    my $self = shift;
    
    # grab the logging object
    my $logger = get_logger("Document");

    # textWrap and removeParagraphLineBreaks settings
    foreach ("textWrapOptions","removeParagraphLineBreaks"){

        # first check for either
        #
        # textWrapOptions:
        #     all: 0
        #
        # or
        #
        # removeParagraphLineBreaks:
        #     all: 0
        #
        # *IMPORTANT*
        # even if all is set to 1, then it can still be disabled on either a
        # 
        # per-object:
        #   
        #   for example
        #
        #       textWrapOptions:
        #           all:
        #               except:
        #                   - environments
        #
        #   will disable textWrapOptions for *all* environments
        #
        # per-name
        # 
        #   for example
        #
        #       textWrapOptions:
        #           all: 
        #               except:
        #                   - itemize
        #
        #   will disable textWrapOptions for itemize
        
        # if 'all' is set as a hash, then the default value is 1, to be turned  off (possibly) later
        ${$self}{$_} = ( ref ${$masterSettings{modifyLineBreaks}{$_}}{all} eq "HASH" ? 1 : ${$masterSettings{modifyLineBreaks}{$_}}{all});

        # get the columns
        if($_ eq "textWrapOptions" and ${$masterSettings{modifyLineBreaks}{textWrapOptions}}{perCodeBlockBasis}){
            $self->yaml_get_columns;
        }
        
        # name of the object in the modifyLineBreaks yaml (e.g environments, ifElseFi, etc)
        my $YamlName = ${$self}{modifyLineBreaksYamlName};
        
        # if the YamlName is either optionalArguments or mandatoryArguments, then we'll be looking for information about the *parent*
        my $name = ($YamlName =~ m/Arguments/) ? ${$self}{parent} : ${$self}{name};

        # move to the next <thing> if
        #
        #   textWrapOptions/removeParagraphLineBreaks::
        #       all: 1
        #
        if(${$self}{$_} 
                    and 
                ref ${$masterSettings{modifyLineBreaks}{$_}}{all} ne "HASH" 
                    and 
                ${$masterSettings{modifyLineBreaks}{$_}}{all}){
               $logger->trace("$_ for $name is ${$self}{$_}") if $is_t_switch_active;
               next;  
        };

        # otherwise, look for exceptions, either through
        #
        #   textWrapOptions/removeParagraphLineBreaks:
        #       all:
        #           except:
        #               - <*type* of thing or *name* of thing>
        #
        # so, for example, the following (per code-block) is acceptable
        # which makes an exception for all *environments*
        #
        #       all:
        #           except:
        #               - 'environments'
        #
        # the following (per-name) is acceptable 
        # which only makes an exception for things called itemize
        #
        #       all:
        #           except:
        #               - 'itemize'
        #
        if(${$self}{$_} 
                and 
           defined ${${$masterSettings{modifyLineBreaks}{$_}}{all}}{except} 
                and 
           ref ${${$masterSettings{modifyLineBreaks}{$_}}{all}}{except} eq "ARRAY"
         ){
              my %except = map { $_ => 1 } @{${${$masterSettings{modifyLineBreaks}}{$_}}{all}{except}};
              if( $except{$name} or $except{$YamlName}){
                ${$self}{$_} = 0;
                my $detail = ($except{$name} ? "per-name" : "per-code-block-type");
                $logger->trace("$_ for $name is ${$self}{$_} (found as exception $detail, see $_:all:except)") if $is_t_switch_active;
                next;
              }
        } else {
            # or otherwise through, for example
            #
            #   all: 0
            #   ifElseFi: 1
            #
            # the textWrapOptions/removeParagraphLineBreaks can contain fields that are hashes or scalar
            # 
            if(ref ${$masterSettings{modifyLineBreaks}{$_}}{$YamlName} eq "HASH"){
                # textWrapOptions/removeParagraphLineBreaks:
                #     all: 0
                #     environments: 
                #         quotation: 0
                $logger->trace("*$YamlName specified with fields in $_, looking for $name") if $is_t_switch_active;
                ${$self}{$_} = ${${$masterSettings{modifyLineBreaks}{$_}}{$YamlName}}{$name} if (defined ${${$masterSettings{modifyLineBreaks}{$_}}{$YamlName}}{$name});
            } elsif(defined ${$masterSettings{modifyLineBreaks}{$_}}{$YamlName}){
                # textWrapOptions/removeParagraphLineBreaks:
                #     all: 0
                #     environments: 0
                $logger->trace("*$YamlName specified with just a number in $_ ${$masterSettings{modifyLineBreaks}{$_}}{$YamlName}") if $is_t_switch_active;
                ${$self}{$_} = ${$masterSettings{modifyLineBreaks}{$_}}{$YamlName} if (defined ${$masterSettings{modifyLineBreaks}{$_}}{$YamlName});
            }
        }

        # summary to log file
        $logger->trace("$_ for $name is ${$self}{$_}") if $is_t_switch_active;
    }

    return;
}

sub yaml_get_columns{
    my $self = shift;

    my $YamlName = ${$self}{modifyLineBreaksYamlName};

    # the columns settings can have a variety of different ways of being specified
    if(ref ${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns} eq "HASH"){
        # assign default value of $columns
        my $columns;
        if(defined ${${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns}}{default}){
            $columns = ${${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns}}{default};
        } else {
            $columns = 80;
        }

        # possibly specify object wrapping on a per-name basis
        if(ref ${${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns}}{$YamlName} eq "HASH"){
            # for example:
            #   modifyLineBreaks:
            #       textWrapOptions:
            #           columns: 
            #               default: 80
            #               environments:
            #                   default: 80
            #                   something: 10
            #                   another: 20
            if(defined ${${${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns}}{$YamlName}}{${$self}{name}}){
                $columns = ${${${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns}}{$YamlName}}{${$self}{name}};
            } elsif (${${${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns}}{$YamlName}}{default}){
                $columns = ${${${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns}}{$YamlName}}{default};
            }
        } else {
            # for example:
            #   modifyLineBreaks:
            #       textWrapOptions:
            #           columns: 
            #               default: 80
            #               environments: 10
            $columns = ${${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns}}{$YamlName};
        }
        ${$self}{columns} = $columns;
    } else {
        ${$self}{columns} = ${$masterSettings{modifyLineBreaks}{textWrapOptions}}{columns};
    }
    return;
}

sub yaml_poly_switch_get_every_or_custom_value{
  my $self = shift;
  my %input = @_;

  my $toBeAssignedTo = $input{toBeAssignedTo};
  my $toBeAssignedToAlias = $input{toBeAssignedToAlias};

  # grab the logging object
  my $logger = get_logger("Document");

  # alias
  if(${$self}{aliases}{$toBeAssignedTo}){
        $logger->trace("aliased $toBeAssignedTo using ${$self}{aliases}{$toBeAssignedTo}") if($is_t_switch_active);
  }

  # name of the object in the modifyLineBreaks yaml (e.g environments, ifElseFi, etc)
  my $YamlName = ${$self}{modifyLineBreaksYamlName};

  # if the YamlName is either optionalArguments or mandatoryArguments, then we'll be looking for information about the *parent*
  my $name = ($YamlName =~ m/Arguments/) ? ${$self}{parent} : ${$self}{name};

  # these variables just ease the notation what follows
  my $everyValue = ${${$masterSettings{modifyLineBreaks}}{$YamlName}}{$toBeAssignedToAlias};
  my $customValue = ${${${$masterSettings{modifyLineBreaks}}{$YamlName}}{$name}}{$toBeAssignedToAlias};

  # check for the *custom* value
  if (defined $customValue){
      $logger->trace("$name: $toBeAssignedToAlias=$customValue, (*per-name* value) adjusting $toBeAssignedTo") if($is_t_switch_active);
      ${$self}{$toBeAssignedTo} = $customValue !=0 ? $customValue : undef;
   } else {
      # check for the *every* value
      if (defined $everyValue and $everyValue != 0){
          $logger->trace("$name: $toBeAssignedToAlias=$everyValue, (*global* value) adjusting $toBeAssignedTo") if($is_t_switch_active);
          ${$self}{$toBeAssignedTo} = $everyValue;
      }
   }
  return;
}

sub yaml_get_indentation_information{
    my $self = shift;

    #**************************************
    # SEARCHING ORDER:
    #   noAdditionalIndent *per-name* basis
    #   indentRules *per-name* basis
    #   noAdditionalIndentGlobal
    #   indentRulesGlobal
    #**************************************

    # noAdditionalIndent can be a scalar or a hash, e.g
    #
    #   noAdditionalIndent:
    #       myexample: 1
    #
    # OR
    #
    #   noAdditionalIndent:
    #       myexample: 
    #           body: 1
    #           optionalArguments: 1
    #           mandatoryArguments: 1
    # 
    # specifying as a scalar with no field (e.g myexample: 1)
    # will be interpreted as noAdditionalIndent for *every*
    # field, so the body, optional arguments and mandatory arguments
    # will *all* receive noAdditionalIndent 
    #
    # indentRules can also be a scalar or a hash, e.g
    #   indentRules:
    #       myexample: "\t"
    #
    # OR
    #
    #   indentRules:
    #       myexample:
    #           body: "  "
    #           optionalArguments: "\t \t"
    #           mandatoryArguments: ""
    #
    # specifying as a scalar with no field will
    # mean that *every* field will receive the same treatment

    # if the YamlName is, for example, optionalArguments, mandatoryArguments, heading, then we'll be looking for information about the *parent*
    my $name = (defined ${$self}{nameForIndentationSettings}) ? ${$self}{nameForIndentationSettings} : ${$self}{name};

    # if the YamlName is not optionalArguments, mandatoryArguments, heading (possibly others) then assume we're looking for 'body'
    my $YamlName = $self->yaml_get_object_attribute_for_indentation_settings;

    # grab the logging object
    my $logger = get_logger("Document");

    my $indentationInformation;
    foreach my $indentationAbout ("noAdditionalIndent","indentRules"){
        # check that the 'thing' is defined
        if(defined ${$masterSettings{$indentationAbout}}{$name}){
            if(ref ${$masterSettings{$indentationAbout}}{$name} eq "HASH"){
                $logger->trace("$indentationAbout indentation specified with multiple fields for $name, searching for $name: $YamlName (see $indentationAbout)") if $is_t_switch_active ;
                $indentationInformation = ${${$masterSettings{$indentationAbout}}{$name}}{$YamlName};
            } else {
                $indentationInformation = ${$masterSettings{$indentationAbout}}{$name};
                $logger->trace("$indentationAbout indentation specified for $name (for *all* fields, body, optionalArguments, mandatoryArguments, afterHeading), using '$indentationInformation' (see $indentationAbout)") if $is_t_switch_active ;
            }
            # return, after performing an integrity check
            if(defined $indentationInformation){
                if($indentationAbout eq "noAdditionalIndent" and $indentationInformation == 1){
                        $logger->trace("Found! Using '' (see $indentationAbout)") if $is_t_switch_active;
                        return q();
                } elsif($indentationAbout eq "indentRules" and $indentationInformation=~m/^\h*$/){
                        $logger->trace("Found! Using '$indentationInformation' (see $indentationAbout)") if $is_t_switch_active;
                        return $indentationInformation ;
                }
            }
        }
    }

    # gather information
    $YamlName = ${$self}{modifyLineBreaksYamlName};

    foreach my $indentationAbout ("noAdditionalIndent","indentRules"){
        # global assignments in noAdditionalIndentGlobal and/or indentRulesGlobal
        my $globalInformation = $indentationAbout."Global";
        next if(!(defined ${$masterSettings{$globalInformation}}{$YamlName})); 
        if( ($globalInformation eq "noAdditionalIndentGlobal") and ${$masterSettings{$globalInformation}}{$YamlName}==1){
            $logger->trace("$globalInformation specified for $YamlName (see $globalInformation)") if $is_t_switch_active;
            return q();
        } elsif($globalInformation eq "indentRulesGlobal") {
            if(${$masterSettings{$globalInformation}}{$YamlName}=~m/^\h*$/){
                $logger->trace("$globalInformation specified for $YamlName (see $globalInformation)") if $is_t_switch_active;
                return ${$masterSettings{$globalInformation}}{$YamlName};
            } else {
                $logger->trace("$globalInformation specified (${$masterSettings{$globalInformation}}{$YamlName}) for $YamlName, but it needs to only contain horizontal space -- I'm ignoring this one") if $is_t_switch_active;
          }
        }
    }

    # return defaultIndent, by default
    $logger->trace("Using defaultIndent for $name") if $is_t_switch_active;
    return $masterSettings{defaultIndent};
}

sub yaml_get_object_attribute_for_indentation_settings{
    # when looking for noAdditionalIndent or indentRules, we may need to determine
    # which thing we're looking for, e.g
    #
    #   chapter:
    #       body: 0
    #       optionalArguments: 1
    #       mandatoryArguments: 1
    #       afterHeading: 0
    #
    # this method returns 'body' by default, but the other objects (optionalArgument, mandatoryArgument, afterHeading)
    # return their appropriate identifier.
    return "body";
}

1;