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49
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1 package Form::Item;
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2 use strict;
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3 use Common;
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4 our @ISA = qw(Object);
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5
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6 BEGIN {
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7 DeclareProperty Parent => ACCESS_READ;
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8 DeclareProperty Form => ACCESS_READ;
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9 DeclareProperty Id => ACCESS_READ;
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10 DeclareProperty Attributes => ACCESS_ALL;
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11 }
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12
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13 sub CTOR {
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14 my ($this,$id,$form,$parent,$attrib) = @_;
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15
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16 $this->{$Id} = $id or die new Exception('An Id i required for the form item');
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17 $this->{$Form} = $form or die new Exception('A form is required for the form item');
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18 $this->{$Parent} = $parent;
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19 $this->{$Attributes} = $attrib || {};
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20 }
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21
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22 sub Name {
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23 my ($this) = @_;
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24 return $this->{$Id}->Name;
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25 }
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26
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27 sub Navigate {
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28 my ($this,$ItemId) = @_;
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29
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30 $ItemId or die new Exception("An item id is undefined");
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31
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32 return $this->NavigatePath([$ItemId->ToNAVPath]);
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33 }
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34
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35 sub Item {
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36 my ($this,$strId) = @_;
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37
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38 return $this->Navigate($this->Form->MakeItemId($strId,$this));
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39 }
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40
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41 sub NavigatePath {
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42 my ($this,$refPath) = @_;
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43
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44 my $ItemId = shift @$refPath or die new Exception("An item id is undefined");
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45 my $current;
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46
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47 if ($ItemId->isa('Form::ItemId::Prev')) {
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48 $this->{$Parent} or die new Exception('Can\'t navigate to upper level');
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49 $current = $this->{$Parent};
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50 } elsif ($ItemId->isa('Form::ItemId::Root')) {
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51 $current = $this->{$Form};
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52 } else {
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53 $current = $this->ResolveItem($ItemId);
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54 }
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55
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56 if (@$refPath > 0) {
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57 die new Exception('The item not found', $ItemId->Canonical) if not $current;
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58 return $current->NavigatePath($refPath);
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59 } else {
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60 return $current;
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61 }
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62 }
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63
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64 sub ResolveItem {
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65 my ($this,$ItemId) = @_;
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66
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67 die new Exception('Item not found',$ItemId->Name);
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68 }
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69
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70 sub Dispose {
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71 my ($this) = @_;
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72
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73 undef %$this;
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74
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75 $this->SUPER::Dispose;
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76 }
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77
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78
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79 1;
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