Mercurial > pub > Impl

annotate Lib/IMPL/Web/Handler/TTView.pm @ 281:a8dbddf491dd

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refactoring *IMPL::declare reset abstractProps static property after implementing these props *IMPL::Serialization: fixed bug with multiple text parts inside one node *IMPL::Web::Handler::TTView: removed obsolete property 'location' from 'view' template variable
author cin
date Mon, 11 Feb 2013 00:58:22 +0400
parents 89179bb8c388
children 546957c50a36
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1 package IMPL::Web::Handler::TTView;
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2 use strict;
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3
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4 use List::Util qw(first);
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5 use IMPL::Const qw(:prop);
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6 use IMPL::declare {
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7 require => {
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8 Factory => 'IMPL::Web::View::ObjectFactory',
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9 HttpResponse => 'IMPL::Web::HttpResponse',
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10 Loader => 'IMPL::Code::Loader',
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11 ViewResult => '-IMPL::Web::ViewResult'
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12 },
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13 base => [
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14 'IMPL::Object' => undef,
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15 'IMPL::Object::Autofill' => '@_',
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16 'IMPL::Object::Serializable' => undef
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17 ],
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18
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19 props => [
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20 contentType => PROP_RO,
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21 contentCharset => PROP_RO,
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22 loader => PROP_RO,
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23 selectors => PROP_RO | PROP_LIST,
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24 defaultDocument => PROP_RW,
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25 indexResource => PROP_RW,
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26 _selectorsCache => PROP_RW,
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27 _classTemplates => PROP_RW
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28 ]
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29 };
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30
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31 sub CTOR {
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32 my ($this) = @_;
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33
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34 $this->indexResource('index') unless $this->indexResource;
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35 }
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36
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37 sub Invoke {
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38 my ( $this, $action, $next ) = @_;
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39
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40 my $result = $next ? $next->($action) : undef;
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41
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42 my ($model,$view);
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43 if( ref $result and eval { $result->isa(ViewResult) } ) {
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44 $model = $result->model;
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45 $view = $result;
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46 } else {
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47 $model = $result;
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48 $view = ViewResult->new(model => $model);
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49 }
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50
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51 my $vars = {
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52 view => $view,
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53 model => $model,
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54 action => $action,
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55 app => $action->application,
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56 ImportClass => sub {
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57 my $class = shift;
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58
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59 $class = Loader->safe->Require($class);
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60
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61 return Factory->new($class);
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62 }
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63 };
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64
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65 my $doc =
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66 $this->loader->document( eval { $view->template } || $this->SelectView( $action, ref $model ),
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67 $vars );
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68
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69 $doc->location($action->context->{resourceLocation});
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70
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71 my %responseParams = (
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72 type => $this->contentType,
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73 charset => $this->contentCharset,
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74 body => $doc->Render()
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75 );
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76
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77 $responseParams{status} = $view->status if $view->status;
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78 $responseParams{cookies} = $view->cookies if ref $view->cookies eq 'HASH';
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79 $responseParams{headers} = $view->headers if ref $view->headers eq 'HASH';
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80
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81 return HttpResponse->new(
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82 %responseParams
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83 );
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84 }
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85
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86 sub SelectView {
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87 my ( $this, $action, $class ) = @_;
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88
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89 my @path = split /\//, $action->query->path_info(), -1;
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90
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91 shift @path; # remove always empty leading segment
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92
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93 $this->BuildCache unless $this->_selectorsCache;
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94 my $cache = $this->_selectorsCache;
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95
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96 @path = reverse @path;
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97
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98 foreach
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99 my $subclass ( $class ? ( _GetHierarchy($class), '-default' ) : '-default' )
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100 {
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101 my @results;
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102 push @results,
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103 { result => $this->_classTemplates->{$subclass}, level => 0 }
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104 if $this->_classTemplates->{$subclass};
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105
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106 if ( $cache->{$subclass} ) {
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107 my $alternatives =
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108 [ { selector => $cache->{$subclass}, immediate => 1 } ];
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109 $alternatives =
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110 $this->MatchAlternatives( $_, $alternatives, \@results )
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111 foreach @path;
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112 }
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113
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114 if (@results) {
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115 @results = sort { $b->{level} <=> $a->{level} } @results;
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116 return ( shift @results )->{result};
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117 }
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118 }
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119
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120 return $this->defaultDocument;
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121 }
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122
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123 sub _GetHierarchy {
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124 my ($class) = @_;
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125 return unless $class;
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126
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127 no strict 'refs';
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128
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129 return $class, map { _GetHierarchy($_) } @{"${class}::ISA"};
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130 }
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131
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132 sub BuildCache {
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133 my ($this) = @_;
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134
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135 my @selectors;
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136
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137 my $cache = $this->_selectorsCache( {} );
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138 $this->_classTemplates( {} );
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139
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140 foreach my $selector ( $this->selectors ) {
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141 if ( not ref $selector ) {
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142
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143 my ( $path, $data ) = split( /\s*=>\s*/, $selector );
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144
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145 my @path = split( /\s+/, $path );
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146
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147 my $class;
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148
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149 # if this selector has a class part
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150 if ( $path[$#path] =~ m/^\@(.*)/ ) {
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151 $class = $1;
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152 pop @path;
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153 }
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154 else {
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155 $class = '-default';
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156 }
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157
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158 #if this selector has a path
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159 if (@path) {
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160 @path = reverse @path;
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161 my $last = pop @path;
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162 my $t = ( $cache->{$class} ||= {} );
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163 my $level = 1;
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164 foreach my $prim (@path) {
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165 $t = ( $t->{$prim}->{next} ||= {} );
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166 $level++;
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167 }
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168 $t->{$last}->{level} = $level;
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169 $t->{$last}->{data} = $data;
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170
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171 }
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172 else {
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173
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174 # we dont have a selector, only class
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175
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176 $this->_classTemplates->{$class} = $data;
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177 }
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178
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179 }
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180 }
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181 }
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182
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183 sub MatchAlternatives {
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184 my ( $this, $segment, $alternatives, $results ) = @_;
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185
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186 my @next;
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187
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188 foreach my $alt (@$alternatives) {
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189 while ( my ( $selector, $match ) = each %{ $alt->{selector} } ) {
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190
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191 my $context = {
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192 vars => \%{ $alt->{vars} || {} },
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193 selector => $match->{next}
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194 };
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195
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196 if ( $selector =~ s/^>// ) {
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197 $context->{immediate} = 1;
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198 }
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199
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200 if ( my ( $name, $rx ) =
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201 ( $selector =~ m/^\{(?:(\w+)\:)?(.*)\}$/ ) )
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202 {
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203
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204 #this is a regexp
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205
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206 if ( my @captures = ( $segment =~ m/($rx)/ ) ) {
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207 $context->{success} = 1;
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208
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209 if ($name) {
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210 $context->{vars}->{$name} = \@captures;
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211 }
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212 }
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213 }
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214 else {
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215
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216 #this is a segment name
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217 if ( $segment eq $selector ) {
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218 $context->{success} = 1;
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219 }
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220 }
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221
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222 # test if there were a match
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223 if ( delete $context->{success} ) {
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224 if ( my $data = $match->{data} ) {
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225
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226 # interpolate data
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227 $data =~ s/{(\w+)(?:\:(\d+))?}/
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228 my ($name,$index) = ($1,$2 || 0);
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229
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230 if ($context->{vars}{$name}) {
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231 $context->{vars}{$name}[$index];
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232 } else {
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233 "";
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234 }
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235 /gex;
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236
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237 push @$results,
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238 { level => $match->{level}, result => $data };
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239 }
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240 push @next, $context if $context->{selector};
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241 }
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242 else {
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243
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244 #repeat current alternative if it's not required to be immediate
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245 push @next,
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246 {
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247 selector => { $selector, $match },
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248 vars => $alt->{vars}
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249 }
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250 unless $alt->{immediate};
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251 }
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252 }
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253 }
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254
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255 return \@next;
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256 }
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257
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258 1;
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259
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260 __END__
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261
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262 =pod
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263
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264 =head1 NAME
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265
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266 C<IMPL::Web::Handler::TTView> - использует шаблоны для построения представления.
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267
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268 =head1 SYNOPSIS
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269
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270 =begin code xml
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271
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272 <item id="html-view" type="IMPL::Web::Handler::TTView">
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273 <contentType>text/html</contentType>
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274 <loader id="tt-loader" type="IMPL::Web::View::TTLoader">
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275 <options type="HASH">
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276 <INCLUDE_PATH type="IMPL::Config::Reference">
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277 <target>IMPL::Config</target>
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278 <AppBase>view</AppBase>
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279 </INCLUDE_PATH>
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280 <INTERPOLATE>1</INTERPOLATE>
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281 <POST_CHOMP>1</POST_CHOMP>
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282 <ENCODING>utf-8</ENCODING>
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283 </options>
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284 <ext>.tt</ext>
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285 <initializer>global.tt</initializer>
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286 <layoutBase>layouts</layoutBase>
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287 </loader>
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288 <defaultDocument>default</defaultDocument>
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289 <selectors type="ARRAY">
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290 <item>@HASH => dump</item>
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291 <item>@My::Data::Product => product/info</item>
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292 <item>{action:.*} @My::Data::Product => product/{action}</item>
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293 </selectors>
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294 </item>
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295
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296 =end code xml
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297
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298 =head1 DESCRIPTION
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299
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300 Подбирает шаблон для представления результата, полученного при выполнении следующего обработчика. При
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301 выборе используется принцип похожий на селекторы C<CSS>, основывающийся на именах ресурсов и их типах
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302 данных.
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303
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304 =head1 SELECTORS
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305
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306 =begin text
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307
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308 [url-template] [class] => template
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309
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310 shoes => product/list
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311 {action:*.} @My::Data::Product => product/{action}
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312
206
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313 stuff >list => product/list
204
d63f9a92d6d4 +IMPL::Config::Include - simple way to include external config
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314 details => product/details
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315
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316 =end text
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317
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318
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319 =cut
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320