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annotate Lib/IMPL/Web/Handler/TTView.pm @ 218:358f867712b4

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author sergey
date Mon, 20 Aug 2012 17:24:48 +0400
parents c8fe3f84feba
children 47f77e6409f7
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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::lang qw(:declare :constants);
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6 use IMPL::declare {
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7 require => {
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8 Factory => 'IMPL::Object::Factory'
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9 },
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10 base => {
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11 'IMPL::Object' => undef,
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12 'IMPL::Object::Autofill' => '@_',
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13 'IMPL::Object::Serializable' => undef
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14 }
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15 };
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16
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17 BEGIN {
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18 public property contentType => PROP_GET | PROP_OWNERSET;
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19 public property loader => PROP_GET | PROP_OWNERSET;
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20 public property selectors => PROP_GET | PROP_LIST | PROP_OWNERSET;
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21 public property defaultDocument => PROP_ALL;
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22 public property indexResource => PROP_ALL;
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23 private property _selectorsCache => PROP_ALL;
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24 private property _classTemplates => PROP_ALL;
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25 }
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26
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27 sub CTOR {
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28 my ($this) = @_;
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29
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30 $this->indexResource('index') unless $this->indexResource;
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31 }
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32
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33 sub Invoke {
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34 my ($this,$action,$next) = @_;
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35
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36 my $result = $next ? $next->($action) : undef;
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37
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38 my $vars = {
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39 data => $result,
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40 action => $action,
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41 app => $action->application,
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42 LoadFactory => sub {
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43 my $class = shift;
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44
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45 my $module = $class;
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46
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47 $module =~ s/::/\//g;
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48 $module .= ".pm";
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49
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50 require $module;
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51 return Factory->new($class);
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52 }
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53 };
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54
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55 my $doc = $this->loader->document(
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56 $this->SelectView($action,ref $result),
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57 $vars
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58 );
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59
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60 $action->response->contentType($this->contentType);
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61
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62 my $hout = $action->response->streamBody;
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63
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64 print $hout $doc->Render($vars);
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65 }
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66
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67 sub SelectView {
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68 my ($this,$action,$class) = @_;
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69
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70 my @path = split /\//, $action->query->path_info(), -1;
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71
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72 shift @path; # remove always empty leading segment
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73
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74 my $last = pop @path;
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75 $last =~ s/\.\w+$//;
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76 $last ||= $this->indexResource;
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77 push @path,$last;
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78
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79 $this->BuildCache unless $this->_selectorsCache;
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80 my $cache = $this->_selectorsCache;
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81
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82 @path = reverse @path;
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83
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84 foreach my $subclass ( $class ? (_GetHierarchy($class), '-default') : '-plain') {
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85 my @results;
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86 push @results, { result => $this->_classTemplates->{$subclass}, level => 0 } if $this->_classTemplates->{$subclass};
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87 if ($cache->{$subclass}) {
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88 my $alternatives = [ { selector => $cache->{$subclass}, immediate => 1 } ];
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89 $alternatives = $this->MatchAlternatives($_,$alternatives,\@results) foreach @path;
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90 }
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91
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92 if (@results) {
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93 @results = sort { $b->{level} <=> $a->{level} } @results;
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94 return (shift @results)->{result};
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95 }
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96 }
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97
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98 return $this->defaultDocument;
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99 }
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100
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101 sub _GetHierarchy {
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102 my ($class) = @_;
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103 return unless $class;
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104
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105 no strict 'refs';
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106
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107 return $class, map { _GetHierarchy($_) } @{"${class}::ISA"};
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108 }
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109
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110 sub BuildCache {
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111 my ($this) = @_;
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112
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113 my @selectors;
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114
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115 my $cache = $this->_selectorsCache({});
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116 $this->_classTemplates({});
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117
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118 foreach my $selector ($this->selectors) {
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119 if (not ref $selector) {
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120
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121 my ($path,$data) = split(/\s*=>\s*/, $selector);
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122
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123 my @path = split(/\s+/,$path);
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124
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125 my $class;
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126
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127 # if this selector has a class part
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128 if ($path[$#path] =~ m/^\@(.*)/) {
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129 $class = $1;
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130 pop @path;
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131 } else {
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132 $class = '-default';
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133 }
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134
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135 #if this selector has a path
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136 if (@path) {
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137 @path = reverse @path;
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138 my $last = pop @path;
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139 my $t = ( $cache->{$class} ||= {} );
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140 my $level = 1;
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141 foreach my $prim (@path ) {
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142 $t = ($t->{$prim}->{next} ||= {});
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143 $level ++;
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144 }
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145 $t->{$last}->{level} = $level;
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146 $t->{$last}->{data} = $data;
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147
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148 } else {
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149 # we dont have a selector, only class
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150
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151 $this->_classTemplates->{$class} = $data;
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152 }
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153
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154 }
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155 }
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156 }
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157
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158 sub MatchAlternatives {
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159 my ($this,$segment,$alternatives,$results) = @_;
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160
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161 my @next;
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162
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163 foreach my $alt (@$alternatives) {
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164 while (my ($selector,$match) = each %{$alt->{selector}} ) {
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165
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166
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167 my $context = {
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168 vars => \%{ $alt->{vars} || {} },
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169 selector => $match->{next}
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170 };
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171
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172 if ($selector =~ s/^>//) {
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173 $context->{immediate} = 1;
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174 }
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175
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176 if (my ($name,$rx) = ($selector =~ m/^\{(?:(\w+)\:)?(.*)\}$/) ) {
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177 #this is a regexp
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178
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179 if ( my @captures = ($segment =~ m/($rx)/) ) {
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180 $context->{success} = 1;
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181
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182 if ($name) {
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183 $context->{vars}->{$name} = \@captures;
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184 }
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185 }
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186 } else {
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187 #this is a segment name
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188 if ($segment eq $selector) {
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189 $context->{success} = 1;
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190 }
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191 }
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192
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193 # test if there were a match
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194 if (delete $context->{success}) {
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195 if (my $data = $match->{data}) {
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196 # interpolate data
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197 $data =~ s/{(\w+)(?:\:(\d+))?}/
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198 my ($name,$index) = ($1,$2 || 0);
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199
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200 if ($context->{vars}{$name}) {
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201 $context->{vars}{$name}[$index];
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202 } else {
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203 "";
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204 }
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205 /gex;
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206
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207 push @$results, { level => $match->{level}, result => $data };
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208 }
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209 push @next, $context if $context->{selector};
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210 } else {
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211 #repeat current alternative if it's not required to be immediate
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212 push @next, {
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213 selector => { $selector, $match },
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214 vars => $alt->{vars}
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215 } unless $alt->{immediate};
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216 }
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217 }
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218 }
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219
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220 return \@next;
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221 }
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222
199
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223 1;
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224
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225 __END__
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226
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227 =pod
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228
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229 =head1 NAME
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230
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231 C<IMPL::Web::Handler::TTView> - использует шаблоны для построения представления.
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232
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233 =head1 SYNOPSIS
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234
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235 =begin code xml
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236
206
c8fe3f84feba +IMPL::Web::Handlers::ViewSelector
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237 <item id="html-view" type="IMPL::Web::Handler::TTView">
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238 <contentType>text/html</contentType>
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239 <loader id="tt-loader" type="IMPL::Web::View::TTLoader">
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240 <options type="HASH">
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241 <INCLUDE_PATH type="IMPL::Config::Reference">
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242 <target>IMPL::Config</target>
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243 <AppBase>view</AppBase>
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244 </INCLUDE_PATH>
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245 <INTERPOLATE>1</INTERPOLATE>
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246 <POST_CHOMP>1</POST_CHOMP>
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247 <ENCODING>utf-8</ENCODING>
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248 </options>
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249 <ext>.tt</ext>
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250 <initializer>global.tt</initializer>
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251 <layoutBase>layouts</layoutBase>
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252 </loader>
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253 <defaultDocument>default</defaultDocument>
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254 <selectors type="ARRAY">
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255 <item>@HASH => dump</item>
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256 <item>@My::Data::Product => product/info</item>
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257 <item>{action:.*} @My::Data::Product => product/{action}</item>
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258 </selectors>
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259 </item>
199
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260
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261 =end code xml
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262
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263 =head1 DESCRIPTION
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264
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265 Подбирает шаблон для представления результата, полученного при выполнении следующего обработчика. При
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266 выборе используется принцип похожий на селекторы C<CSS>, основывающийся на именах ресурсов и их типах
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267 данных.
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268
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269 =head1 SELECTORS
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270
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271 =begin text
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272
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273 [url-template] [class] => template
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274
206
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275 shoes => product/list
199
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276 {action:*.} @My::Data::Product => product/{action}
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277
206
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278 stuff >list => product/list
204
d63f9a92d6d4 +IMPL::Config::Include - simple way to include external config
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279 details => product/details
203
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280
199
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281 =end text
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282
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283
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284 =cut
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285