annotate Lib/IMPL/Web/TT/Document.pm @ 155:05df123a2ff1

minor fixes
author wizard
date Thu, 30 Sep 2010 18:11:32 +0400
parents eb478083f72b
children 8638dd1374bf
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1 package IMPL::Web::TT::Document;
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2 use strict;
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3 use warnings;
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4
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5 use base qw(IMPL::DOM::Document IMPL::Object::Disposable);
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6 use Template::Context;
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7 use Template::Provider;
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8 use IMPL::Class::Property;
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9 use File::Spec;
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10 use Scalar::Util qw(blessed);
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11 use IMPL::Web::TT::Collection;
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12 use IMPL::Web::TT::Control;
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13 use Carp;
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14 use Encode();
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15
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16 BEGIN {
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17 private property _provider => prop_all;
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18 private property _context => prop_all;
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19 public property cache => prop_all;
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20 public property template => prop_get | owner_set;
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21 public property presenter => prop_all, { validate => \&_validatePresenter };
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22 public property preprocess => prop_all | prop_list,
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23 public property title => prop_all;
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24 private property _controlClassMap => prop_all;
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25 }
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26
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27 our %CTOR = (
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28 'IMPL::DOM::Document' => sub { nodeName => 'document' }
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29 );
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30
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31 sub CTOR {
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32 my ($this,%args) = @_;
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33
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34 $this->_controlClassMap({});
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35 $this->registerControlClass( Control => 'IMPL::Web::TT::Control' );
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36 $this->appendChild( $this->Create(body => 'IMPL::Web::TT::Collection') );
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37 $this->appendChild( $this->Create(head => 'IMPL::Web::TT::Collection') );
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38 $this->cache($args{cache}) if $args{cache};
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39 $this->preprocess($args{preprocess}) if $args{preprocess};
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40 }
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41
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42 sub CreateControl {
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43 my ($this,$name,$class,$args) = @_;
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44
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45 $args = {} unless ref $args eq 'HASH';
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46
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47 if (my $info = $this->_controlClassMap->{$class}) {
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48 my %nodeArgs = (%{$info->{args}},%$args);
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49 $nodeArgs{controlClass} = $class;
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50
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51 return $this->Create($name,$info->{type},\%nodeArgs);
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52 } else {
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53 die new IMPL::Exception('A control is\'t registered', $class, $name);
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54 }
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55 }
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56
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57 sub provider {
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58 my ($this,%args) = @_;
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59
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60 if (my $provider = $this->_provider) {
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61 return $provider;
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62 } else {
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63 return $this->_provider(new Template::Provider(
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64 \%args
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65 ));
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66 }
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67 }
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68
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69 sub context {
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70 my ($this) = @_;
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71
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72 if (my $ctx = $this->_context) {
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73 return $ctx;
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74 } else {
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75 return $this->_context (
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76 new Template::Context(
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77 VARIABLES => {
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78 document => $this,
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79 this => $this,
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80 render => sub {
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81 $this->_process(@_);
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82 },
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83 encode => sub {
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84 Encode::encode('utf8',shift);
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85 }
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86 },
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87 RECURSION => 1,
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88 LOAD_TEMPLATES => [$this->provider]
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89 )
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90 )
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91 }
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92 }
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93
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94 sub resolveVar {
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95 my ($this,$var) = @_;
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96
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97 return $this->context->stash->get($var);
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98 }
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99
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100 sub registerControlClass {
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101 my ($this, $controlClass, $type, $args) = @_;
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102
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103 $type ||= 'IMPL::Web::TT::Control';
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104
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105 die new IMPL::InvalidArgumentException("A controlClass must be a single word",$controlClass) unless $controlClass =~ /^\w+$/;
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106
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107 eval "require $type; 1;" or die new IMPL::Exception("Failed to load a module",$type,"$@") unless eval { $type->can('new') };
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108
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109 die new IMPL::InvalidArgumentException("A type must be subclass of IMPL::DOM::Node",$type) unless $type->isa('IMPL::DOM::Node');
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110
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111 # resolve template name to a real template
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112 $args->{template} = $this->context->template($args->{template}) if $args->{template};
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113
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114 $this->_controlClassMap->{$controlClass} = {
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115 controlClass => $controlClass,
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116 type => $type,
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117 args => ref $args eq 'HASH' ? $args : {}
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118 };
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119 }
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120
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121 sub require {
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122 my ($this,$template) = @_;
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123
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124 my $doc = $this->context->template($template);
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125
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126 die new IMPL::InvalidOperationException("A specified template isn't a document",$template) unless eval{ $doc -> isa('Template::Document') };
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127
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128 my $controlClass = $doc->class;
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129 my $type = $doc->nativeType;
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130 my $controlTemplate;
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131 my $out = "";
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132
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133 die new IMPL::InvalidOperationException("A specified template isn't a control",$template) unless $controlClass;
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134
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135 if (not $this->isControlClass($controlClass)) {
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136 if ($doc->template) {
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137 $controlTemplate = $doc->blocks()->{$doc->template} || $this->context->template($doc->template);
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138 $out = $this->context->include($doc);
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139 } else {
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140 $controlTemplate = $doc;
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141 }
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142 $this->registerControlClass($controlClass,$type,{ template => $controlTemplate } );
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143 }
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144
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145 return $out;
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146 }
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147
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148 sub isControlClass {
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149 my ($this,$name) = @_;
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150 return $this->_controlClassMap->{$name} ? 1 : 0;
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151 }
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152
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153 sub _getControls {
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154 my ($this) = @_;
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155
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156 my ($node) = $this->selectNodes('controls');
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157 return $node;
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158 }
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159
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160 sub _validatePresenter {
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161 my ($this,$value) = @_;
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162
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163 die new IMPL::InvalidArgumentException("A view object is required") unless blessed($value) and $value->isa('Template::View');
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164 }
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165
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166 sub LoadFile {
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167 my ($this,$filePath,$encoding,$includes,$vars) = @_;
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168
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169 die new IMPL::InvalidArgumentException("A filePath parameter is required") unless $filePath;
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170
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171 $encoding ||= 'utf8';
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172
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173 $this->_context(undef);
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174 $this->_provider(undef);
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175
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176 my ($vol,$dir,$fileName) = File::Spec->splitpath($filePath);
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177
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178 my $inc = File::Spec->catpath($vol,$dir,'');
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179
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180 $this->provider(
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181 ENCODING => $encoding,
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182 INTERPOLATE => 1,
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183 PRE_CHOMP => 1,
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184 POST_CHOMP => 1,
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185 TRIM => 0,
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186 COMPILE_EXT => $this->cache ? '.ttc' : undef,
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187 COMPILE_DIR => $this->cache,
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188 INCLUDE_PATH => [$inc,ref $includes ? @$includes : $includes ]
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189 );
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190
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191 if ($vars) {
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192 while ( my ($var,$val) = each %$vars ) {
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193 $this->AddVar($var,$val);
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194 }
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195 }
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196
146
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197 $this->context->process($_) foreach $this->preprocess;
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198
154
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199 my $template = $this->context->template($fileName);
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200 $this->title($template->title);
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201 if ( $template->template ) {
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202 $this->context->process($template);
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203 $this->template($template->template);
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204 } else {
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205 $this->template($template);
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206 }
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207
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208 }
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209
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210 sub AddVar {
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211 my ($this,$name,$value) = @_;
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212
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213 $this->context->stash->set($name,$value);
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214 }
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215
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216 sub Render {
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217 my ($this) = @_;
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218
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219 return $this->context->process($this->template);
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220 }
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221
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222 # Формирует представление для произвольных объектов
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223 sub _process {
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224 my ($this,@items) = @_;
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225
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226 my @result;
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227
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228 foreach my $item (@items) {
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229 if (blessed($item) and $item->isa('IMPL::Web::TT::Control')) {
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230 push @result, $item->Render();
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231 } elsif(blessed($item)) {
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232 if ($this->presenter) {
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233 push @result, $this->presenter->print($item);
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234 } else {
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235 push @result, $this->toString;
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236 }
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237 } else {
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238 push @result, $item;
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239 }
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240 }
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241
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242 return join '',@result;
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243 }
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244
108
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245 our $AUTOLOAD;
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246 sub AUTOLOAD {
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247 my $this = shift;
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248 my ($method) = ($AUTOLOAD =~ /(\w+)$/);
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249
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250 if($method =~ /^create(\w+)/) {
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251 my ($name,$args) = @_;
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252 return $this->CreateControl($name,$1,$args);
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253 }
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254
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255 my @result = $this->selectNodes($method);
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256
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257 return $result[0] if @result;
109
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258 carp "Looks like you have a mistake, document doesn't have a such property or child: $method";
108
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259 return;
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260 }
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261
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262 sub Dispose {
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263 my ($this) = @_;
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264
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265 $this->template(undef);
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266 $this->_context(undef);
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267 $this->_provider(undef);
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268
108
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269 $this->supercall::Dispose();
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270 }
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271
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272 1;
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273 __END__
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274 =pod
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275
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276 =head1 NAME
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277
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278 C<IMPL::Web::TT::Document> - Документ, позволяющий строить представление по шаблону
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279
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280 =head1 SYNOPSIS
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281
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282 =begin code
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283
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284 // create new document
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285 my $doc = new IMPL::Web::TT::Document;
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286
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287 // load template
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288 $doc->loadFile('Templates/index.tt');
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289
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290 // render file
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291 print $doc->Render();
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292
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293 =end code
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294
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295 =head1 DESCRIPTION
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296
77
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297 C<use base qw(IMPL::DOM::Document)>
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298
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299 Документ, основанный на шаблоне Template::Toolkit. Позволяет загрузить шаблон,
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300 и сформировать окончательный документ. Является наследником C<IMPL::DOM::Node>,
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301 т.о. может быть использован для реализации DOM модели.
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302
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303 Внутри шаблона переменная C<document> ссылается на объект документа. По этой
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304 причине образуется циклическая ссылка между объектами шаблона и документом, что
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305 требует вызова метода C<Dispose> для освобождения документа.
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306
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307 =head1 METHODS
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308
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309 =over
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310
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311 =item C<CTOR()>
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312
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313 Создает новый экземпляр документа, свойство C<nodeName> устанавливается в 'C<document>'
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314
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315 =item C<$doc->LoadFile($fileName,$encoding)>
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316
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317 Загружает шаблон из файла C<$fileName>, используя кодировку C<$encoding>. Если
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318 кодировка не указана, использует utf-8.
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319
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320 =item C<$doc->Render()>
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321
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322 Возвращает данные построенные на основе загруженного шаблона.
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323
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324 =item C<$doc->Dispose()>
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325
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326 Освобождает ресурсы и помечает объект как освобожденный.
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327
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328 =back
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329
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330 =head1 DOM
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331
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332 Документ представляет собой DOM документ, состоящий из узлов, которые представляют собой данные
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333 для отображения. Для форматированого вывода используется C<template>.
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334
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335 В качестве элементов документа могут присутсвовать специальные объекты C<IMPL::Web::TT::Control>,
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336 которые внутри содержат шаблон для форматирования собственного содержимого.
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337
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338
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339
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340 Документ предоставляет ряд фнукций для работы с элементами управления.
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341
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342 =head1 TEMPLATE
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343
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344 =begin code html
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345
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346 [% CALL document.registerClass( 'Table', 'My::TableClass', template => 'tables/pretty.tt' ) %]
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347 [% CALL document.registerClass( 'Form' )%]
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348
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349 [% table = document.сreateTable('env') %]
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350
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351 [% FOEACH item in document.result %]
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352 [% table.rows.Add( item.get('name','value') ) %]
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353 [% END %]
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354
108
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355 [% form = document.createForm('login') %]
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356 [% form.template = 'LOGIN_FORM'%]
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357
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358 [% FOREACH item IN document.childNodes %]
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359 [%render(item)%]
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360 [% END %]
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361
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362 [% BLOCK LOGIN_FORM %]
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363 <form method="POST" action='/login.pl'>
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364 user: [% render(this.item('name')) %] password: [% render(this.item('password')) %] <input type="submit"/>
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365 </form>
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366 [% END %]
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367
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368 =end code html
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369
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370 =cut