/[webpac]/trunk2/lib/WebPAC/Tree.pm
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revision 442 by dpavlin, Tue Sep 14 17:10:04 2004 UTC revision 469 by dpavlin, Fri Sep 24 18:04:48 2004 UTC
# Line 5  use strict; Line 5  use strict;
5    
6  use Carp;  use Carp;
7  use Log::Log4perl qw(get_logger :levels);  use Log::Log4perl qw(get_logger :levels);
8  use locale;  use YAML;
9    
10  =head1 NAME  =head1 NAME
11    
# Line 23  of tree individually (so you can limit d Line 23  of tree individually (so you can limit d
23    
24   my @tree = ({   my @tree = ({
25          # level 0          # level 0
26          code_arr        => sub { @{$l->{$_[0]}} },          code_arr        => sub { @{$_[0]} },
27          filter_code     => sub { shift },          filter_code     => sub { shift },
28          lookup_v900     => sub {          lookup_v900     => sub {
29                                  my ($c,$p) = @_;                                  my ($c,$p) = @_;
# Line 32  of tree individually (so you can limit d Line 32  of tree individually (so you can limit d
32                          },                          },
33          lookup_term     => sub { shift @{$l->{"d:".$_[0]}} },          lookup_term     => sub { shift @{$l->{"d:".$_[0]}} },
34          lookup_mfn      => sub { shift @{$l->{"900_mfn:".$_[0]}} },          lookup_mfn      => sub { shift @{$l->{"900_mfn:".$_[0]}} },
35          have_children   => sub { defined($l->{$_[1]}) },          have_children   => sub { return $l->{$_[1]} },
         child_code      => sub { return $_[1] },  
36          },{          },{
37          # level 1          # level 1
38          code_arr        => sub { @{$l->{$_[0]}} },          code_arr        => sub { @{$_[0]} },
39          filter_code     => sub { shift },          filter_code     => sub { shift },
40          lookup_v900     => sub {          lookup_v900     => sub {
41                                  my ($c,$p) = @_;                                  my ($c,$p) = @_;
# Line 46  of tree individually (so you can limit d Line 45  of tree individually (so you can limit d
45          lookup_term     => sub { shift @{$l->{"d:".$_[0]}} },          lookup_term     => sub { shift @{$l->{"d:".$_[0]}} },
46          lookup_mfn      => sub { shift @{$l->{"900_mfn:".$_[0]}} },          lookup_mfn      => sub { shift @{$l->{"900_mfn:".$_[0]}} },
47          have_children   => sub { 0 },          have_children   => sub { 0 },
         child_code      => sub { 0 },  
48   )};   )};
49    
50    You can, however, create recursion with C<have_children_at_level> discussed
51    below, but you loose ability to limit tree depth or to specify different
52    style for each level.
53    
54  Documentation for each element of tree is little sparse, but here it is:  Documentation for each element of tree is little sparse, but here it is:
55    
56  =over 5  =over 5
# Line 74  Returns code or C<false> if code has to Line 76  Returns code or C<false> if code has to
76    
77  Lookup value which will be called C<$v900> from now on.  Lookup value which will be called C<$v900> from now on.
78    
79   my $v900 = $t->{'lookup_v900'}->($code,$start_code);   my $v900 = $t->{'lookup_v900'}->($code);
80    
81  =item lookup_term  =item lookup_term
82    
# Line 90  Lookup mfn value, used to create hyperli Line 92  Lookup mfn value, used to create hyperli
92    
93  =item have_children  =item have_children
94    
95  Returns C<true> or C<false> depending if current node have children.  Returns children for next iteration of tree generation or undef.
96    
97     my $next_lvl = $t->{'have_children'}->($code,$v900);
98    
99   if ($t->{'have_children'}->($code,$v900,$start_code)) { ... }  =item have_children_at_level
100    
101  =item child_code  Returns children for next iteration and next level.
102    
103  Returns child code for next iteration of tree generation.   my ($level,$next_lvl) = $t->{'have_children_at_level'}->($code,$v900);
104    
105   my $child_code = $t->{'child_code'}->($code,$v900,$start_code);  It's safe to return undef just for next level data (C<$next_lvl> in example
106    above) to stop recursion.
107    
108  =back  =back
109    
# Line 151  sub new { Line 156  sub new {
156          $self->{'show_ids'} = [];          $self->{'show_ids'} = [];
157          $self->{'hide_ids'} = [];          $self->{'hide_ids'} = [];
158    
159          my $html = $self->unroll(0,'');          my $html = $self->unroll(0,());
160    
161          my $html_file = $self->{'dir'}.'/'.$self->{'html'};          my $html_file = $self->{'dir'}.'/'.$self->{'html'};
162    
# Line 181  sub new { Line 186  sub new {
186    
187  Generate tree recursively.  Generate tree recursively.
188    
189   my $html = $tree->unroll($level,$start_code);   my $html = $tree->unroll($level,$data_arr);
190    
191  =cut  =cut
192    
193  sub unroll {  sub unroll {
194          my $self = shift;          my $self = shift;
195    
196          my ($level,$start_code) = @_;          my ($level,$data_arr) = @_;
197    
198          my $log = $self->_get_logger();          my $log = $self->_get_logger();
199    
200            if (! defined($level)) {
201                    $log->warn("level is undef, stoping recursion...");
202                    return;
203            }
204    
205            my $next_level = $level + 1;
206    
207          $log->logconfess("need level") unless (defined($level));          $log->logconfess("need level") unless (defined($level));
208          $log->logconfess("need start_code") unless (defined($start_code));          #$log->logconfess("need data_arr") unless (defined($data_arr));
209    
210          my $tree = $self->{'tree'};          my $tree = $self->{'tree'};
211    
# Line 202  sub unroll { Line 214  sub unroll {
214          # all levels passed?          # all levels passed?
215          return if (! defined($tree->[$level]));          return if (! defined($tree->[$level]));
216    
217          $log->debug("unroll level $level, start code $start_code");          $log->debug("unroll level $level");
218    
219          my $html;          my $html;
220    
221          foreach my $code ($tree->[$level]->{'code_arr'}->($start_code)) {          foreach my $code ($tree->[$level]->{'code_arr'}->($data_arr)) {
222    
223                  if ($code = $tree->[$level]->{'filter_code'}->($code)) {                  if ($code = $tree->[$level]->{'filter_code'}->($code)) {
224                                    
225                          $log->debug("# $level filter passed code $code");                          $log->debug("# $level filter passed code $code");
226    
227                          my $v900 = $tree->[$level]->{'lookup_v900'}->($code,$start_code) || $log->warn("can't lookup_v900($code,$start_code)");                          my $v900 = $tree->[$level]->{'lookup_v900'}->($code) || $log->warn("can't lookup_v900($code)") && return;
228                          $log->debug("# $level lookup_v900($code,$start_code) = $v900");                          $log->debug("# $level lookup_v900($code) = $v900");
229    
230                          my $term = $tree->[$level]->{'lookup_term'}->($code,$v900) || $log->warn("can't lookup_term($code,$v900)");                          my $term = $tree->[$level]->{'lookup_term'}->($code,$v900) || $log->warn("can't lookup_term($code,$v900)") && return;
231                          $log->debug("# $level lookup_term($code,$v900) = $term");                          $log->debug("# $level lookup_term($code,$v900) = $term");
232    
233                          my $mfn  = $tree->[$level]->{'lookup_mfn'}->($code,$v900)  || $log->warn("can't lookup_mfn($code,$v900)");                          my $mfn  = $tree->[$level]->{'lookup_mfn'}->($code,$v900)  || $log->warn("can't lookup_mfn($code,$v900)") && return;
234                          $log->debug("# $level lookup_mfn($code,$v900) = $mfn");                          $log->debug("# $level lookup_mfn($code,$v900) = $mfn");
235    
236                          $log->debug("$code -> $v900 : $term [$mfn]");                          $log->debug("$code -> $v900 : $term [$mfn]");
237    
238                          my ($link_start,$link_end) = ('','');                          my ($link_start,$link_end) = ('<a name="mfn'.$mfn.'"></a>','');
239                    
240                          my $have_children = $tree->[$level]->{'have_children'}->($code,$v900,$start_code);                          my $have_children = $tree->[$level]->{'have_children'}->($code,$v900);
241                          if ($have_children) {  
242                                  ($link_start,$link_end) = (qq{<a href="#mfn$mfn" onClick="return toggle_display('id$mfn');">},qq{</a>});                          if (! $have_children) {
243                          } else {                                  $log->debug("# $level doesn't have_children($code,$v900)");
244                                  $log->debug("# $level doesn't have_children($code,$v900,$start_code)");                                  ($next_level,$have_children) = $tree->[$level]->{'have_children_at_level'}->($code,$v900) if ($tree->[$level]->{'have_children_at_level'});
245                                    $log->debug("# $level have_children($code,$v900) on level $next_level") if ($have_children);
246    
247                          }                          }
248    
249                            ($link_start,$link_end) = (qq{<a href="#mfn$mfn" onClick="return toggle_display('id$mfn');">},qq{</a>}) if ($have_children);
250    
251                          my $mfn_link = "thes/$mfn.html";                          my $mfn_link = "thes/$mfn.html";
252                          if (-e "out/$mfn_link") {                          if (-e "out/$mfn_link") {
253                                  $html .= " " x $level .                                  $html .= " " x $level .
254                                          qq{<li>${link_start}${term}${link_end}}.                                          qq{<li>${link_start}<span id="o$mfn">${term}</span>${link_end}}.
255                                          qq{&nbsp;<a href="$mfn_link">&raquo;</a></li>\n};                                          qq{&nbsp;<a href="$mfn_link">&raquo;</a></li>\n};
256                          } else {                          } else {
257                                  $log->warn("file 'out/$mfn_link' doesn't exist, skipping");                                  $log->warn("file 'out/$mfn_link' doesn't exist, skipping");
# Line 262  sub unroll { Line 278  sub unroll {
278                                  push @{$self->{'show_ids'}}, "id$mfn";                                  push @{$self->{'show_ids'}}, "id$mfn";
279                          }                          }
280    
281                          $html .= $self->unroll($level+1, $tree->[$level]->{'child_code'}->($code,$v900,$start_code));                          $html .= $self->unroll($next_level, $have_children);
282                                                    
283                          $html .= " " x $level . qq{</ul>\n};                          $html .= " " x $level . qq{</ul>\n};
284    

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