annotate Lib/IMPL/Web/TT/Document.pm @ 158:a9f4ba4783eb

Minor changes
author wizard
date Tue, 02 Nov 2010 20:17:22 +0300
parents c7652cf29a80
children 4267a2ac3d46
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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 use Data::Dumper;
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16
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17 BEGIN {
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18 private property _provider => prop_all;
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19 private property _context => prop_all;
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20 public property cache => prop_all;
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21 public property template => prop_get | owner_set;
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22 public property presenter => prop_all, { validate => \&_validatePresenter };
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23 public property preprocess => prop_all | prop_list,
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24 public property title => prop_all;
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25 private property _controlClassMap => prop_all;
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26 }
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27
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28 our %CTOR = (
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29 'IMPL::DOM::Document' => sub { nodeName => 'document' }
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30 );
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31
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32 sub CTOR {
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33 my ($this,%args) = @_;
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34
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35 $this->_controlClassMap({});
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36 $this->registerControlClass( Control => 'IMPL::Web::TT::Control' );
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37 $this->appendChild( $this->Create(body => 'IMPL::Web::TT::Collection') );
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38 $this->appendChild( $this->Create(head => 'IMPL::Web::TT::Collection') );
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39 $this->cache($args{cache}) if $args{cache};
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40 $this->preprocess($args{preprocess}) if $args{preprocess};
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41 }
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42
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43 sub CreateControl {
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44 my ($this,$name,$class,$args) = @_;
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45
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46 $args = {} unless ref $args eq 'HASH';
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47
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48 if (my $info = $this->_controlClassMap->{$class}) {
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49 my %nodeArgs = (%{$info->{args}},%$args);
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50 $nodeArgs{controlClass} = $class;
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51
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52 return $this->Create($name,$info->{type},\%nodeArgs);
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53 } else {
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54 die new IMPL::Exception('A control is\'t registered', $class, $name);
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55 }
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56 }
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57
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58 sub provider {
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59 my ($this,%args) = @_;
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60
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61 if (my $provider = $this->_provider) {
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62 return $provider;
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63 } else {
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64 return $this->_provider(new Template::Provider(
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65 \%args
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66 ));
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67 }
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68 }
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69
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70 sub context {
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71 my ($this) = @_;
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72
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73 if (my $ctx = $this->_context) {
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74 return $ctx;
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75 } else {
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76 return $this->_context (
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77 new Template::Context(
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78 VARIABLES => {
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79 document => $this,
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80 this => $this,
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81 render => sub {
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82 $this->_process(@_);
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83 },
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84 encode => sub {
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85 Encode::encode('utf8',shift);
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86 },
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87 dump => sub {
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88 Dumper(shift);
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89 },
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90 as_list => sub {
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91 [ map ref($_) eq 'ARRAY' ? @$_ : $_, @_ ]
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92 }
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93 },
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94 RECURSION => 1,
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95 LOAD_TEMPLATES => [$this->provider]
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96 )
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97 )
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98 }
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99 }
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100
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101 sub resolveVar {
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102 my ($this,$var) = @_;
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103
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104 return $this->context->stash->get($var);
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105 }
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106
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107 sub registerControlClass {
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108 my ($this, $controlClass, $type, $args) = @_;
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109
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110 $type ||= 'IMPL::Web::TT::Control';
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111
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112 die new IMPL::InvalidArgumentException("A controlClass must be a single word",$controlClass) unless $controlClass =~ /^\w+$/;
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113
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114 eval "require $type; 1;" or die new IMPL::Exception("Failed to load a module",$type,"$@") unless eval { $type->can('new') };
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115
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116 die new IMPL::InvalidArgumentException("A type must be subclass of IMPL::DOM::Node",$type) unless $type->isa('IMPL::DOM::Node');
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117
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118 # resolve template name to a real template
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119 $args->{template} = $this->context->template($args->{template}) if $args->{template};
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120
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121 $this->_controlClassMap->{$controlClass} = {
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122 controlClass => $controlClass,
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123 type => $type,
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124 args => ref $args eq 'HASH' ? $args : {}
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125 };
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126 }
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127
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128 sub require {
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129 my ($this,$template) = @_;
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130
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131 my $doc = $this->context->template($template);
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132
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133 die new IMPL::InvalidOperationException("A specified template isn't a document",$template) unless eval{ $doc -> isa('Template::Document') };
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134
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135 my $controlClass = $doc->class;
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136 my $type = $doc->nativeType;
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137 my $controlTemplate;
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138 my $out = "";
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139
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140 die new IMPL::InvalidOperationException("A specified template isn't a control",$template) unless $controlClass;
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141
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142 if (not $this->isControlClass($controlClass)) {
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143 if ($doc->template) {
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144 $controlTemplate = $doc->blocks()->{$doc->template} || $this->context->template($doc->template);
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145 $out = $this->context->include($doc);
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146 } else {
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147 $controlTemplate = $doc;
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148 }
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149 $this->registerControlClass($controlClass,$type,{ template => $controlTemplate } );
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150 }
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151
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152 return $out;
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153 }
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154
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155 sub isControlClass {
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156 my ($this,$name) = @_;
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157 return $this->_controlClassMap->{$name} ? 1 : 0;
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158 }
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159
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160 sub _getControls {
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161 my ($this) = @_;
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162
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163 my ($node) = $this->selectNodes('controls');
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164 return $node;
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165 }
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166
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167 sub _validatePresenter {
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168 my ($this,$value) = @_;
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169
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170 die new IMPL::InvalidArgumentException("A view object is required") unless blessed($value) and $value->isa('Template::View');
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171 }
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172
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173 sub LoadFile {
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174 my ($this,$src,$encoding,$includes,$vars) = @_;
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175
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176 die new IMPL::InvalidArgumentException("A template parameter is required") unless $src;
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177
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178 $includes = [$includes] if $includes and not ref $includes;
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179
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180 $encoding ||= 'utf8';
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181
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182 $this->_context(undef);
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183 $this->_provider(undef);
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184
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185 if (not ref $src) {
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186 my ($vol,$dir,$fileName) = File::Spec->splitpath($src);
157
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187 unshift @$includes, File::Spec->catpath($vol,$dir,'');
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188 $src = $fileName;
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189 }
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190
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191 $this->provider(
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192 ENCODING => $encoding,
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193 INTERPOLATE => 1,
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194 PRE_CHOMP => 1,
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195 POST_CHOMP => 1,
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196 TRIM => 0,
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197 COMPILE_EXT => $this->cache ? '.ttc' : undef,
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198 COMPILE_DIR => $this->cache,
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199 INCLUDE_PATH => $includes
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200 );
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201
154
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202 if ($vars) {
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203 while ( my ($var,$val) = each %$vars ) {
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204 $this->AddVar($var,$val);
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205 }
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206 }
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207
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208 $this->context->process($_) foreach $this->preprocess;
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209
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210 my $template = $this->context->template($src);
154
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211 $this->title($template->title);
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212 if ( $template->template ) {
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213 $this->context->process($template);
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214 $this->template($template->template);
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215 } else {
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216 $this->template($template);
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217 }
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218
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219 }
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220
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221 sub AddVar {
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222 my ($this,$name,$value) = @_;
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223
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224 $this->context->stash->set($name,$value);
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225 }
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226
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227 sub Render {
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228 my ($this) = @_;
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229
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230 return $this->context->process($this->template);
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231 }
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232
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233 # Формирует представление для произвольных объектов
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234 sub _process {
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235 my ($this,@items) = @_;
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236
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237 my @result;
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238
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239 foreach my $item (@items) {
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240 if (blessed($item) and $item->isa('IMPL::Web::TT::Control')) {
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241 push @result, $item->Render();
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242 } elsif(blessed($item)) {
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243 if ($this->presenter) {
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244 push @result, $this->presenter->print($item);
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245 } else {
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246 push @result, $this->toString;
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247 }
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248 } else {
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249 push @result, $item;
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250 }
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251 }
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252
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253 return join '',@result;
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254 }
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255
108
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256 our $AUTOLOAD;
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257 sub AUTOLOAD {
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258 my $this = shift;
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259 my ($method) = ($AUTOLOAD =~ /(\w+)$/);
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260
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261 if($method =~ /^create(\w+)/) {
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262 my ($name,$args) = @_;
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263 return $this->CreateControl($name,$1,$args);
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264 }
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265
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266 my @result = $this->selectNodes($method);
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267
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268 return $result[0] if @result;
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269 carp "Looks like you have a mistake, document doesn't have a such property or child: $method";
108
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270 return;
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271 }
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272
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273 sub Dispose {
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274 my ($this) = @_;
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275
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276 $this->template(undef);
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277 $this->_context(undef);
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278 $this->_provider(undef);
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279
108
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280 $this->supercall::Dispose();
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281 }
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282
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283 1;
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284 __END__
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285 =pod
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286
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287 =head1 NAME
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288
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289 C<IMPL::Web::TT::Document> - Документ, позволяющий строить представление по шаблону
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290
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291 =head1 SYNOPSIS
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292
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293 =begin code
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294
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295 // create new document
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296 my $doc = new IMPL::Web::TT::Document;
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297
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298 // load template
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299 $doc->loadFile('Templates/index.tt');
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300
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301 // render file
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302 print $doc->Render();
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303
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304 =end code
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305
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306 =head1 DESCRIPTION
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307
77
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308 C<use base qw(IMPL::DOM::Document)>
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309
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310 Документ, основанный на шаблоне Template::Toolkit. Позволяет загрузить шаблон,
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311 и сформировать окончательный документ. Является наследником C<IMPL::DOM::Node>,
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312 т.о. может быть использован для реализации DOM модели.
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313
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314 Внутри шаблона переменная C<document> ссылается на объект документа. По этой
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315 причине образуется циклическая ссылка между объектами шаблона и документом, что
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316 требует вызова метода C<Dispose> для освобождения документа.
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317
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318 =head1 METHODS
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319
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320 =over
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321
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322 =item C<CTOR()>
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323
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324 Создает новый экземпляр документа, свойство C<nodeName> устанавливается в 'C<document>'
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325
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326 =item C<$doc->LoadFile($fileName,$encoding)>
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327
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328 Загружает шаблон из файла C<$fileName>, используя кодировку C<$encoding>. Если
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329 кодировка не указана, использует utf-8.
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330
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331 =item C<$doc->Render()>
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332
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333 Возвращает данные построенные на основе загруженного шаблона.
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334
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335 =item C<$doc->Dispose()>
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336
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337 Освобождает ресурсы и помечает объект как освобожденный.
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338
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339 =back
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340
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341 =head1 DOM
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342
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343 Документ представляет собой DOM документ, состоящий из узлов, которые представляют собой данные
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344 для отображения. Для форматированого вывода используется C<template>.
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345
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346 В качестве элементов документа могут присутсвовать специальные объекты C<IMPL::Web::TT::Control>,
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347 которые внутри содержат шаблон для форматирования собственного содержимого.
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348
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349
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350
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351 Документ предоставляет ряд фнукций для работы с элементами управления.
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352
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353 =head1 TEMPLATE
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354
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355 =begin code html
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356
108
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357 [% CALL document.registerClass( 'Table', 'My::TableClass', template => 'tables/pretty.tt' ) %]
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358 [% CALL document.registerClass( 'Form' )%]
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359
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360 [% table = document.сreateTable('env') %]
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361
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362 [% FOEACH item in document.result %]
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363 [% table.rows.Add( item.get('name','value') ) %]
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364 [% END %]
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365
108
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366 [% form = document.createForm('login') %]
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367 [% form.template = 'LOGIN_FORM'%]
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368
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369 [% FOREACH item IN document.childNodes %]
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370 [%render(item)%]
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371 [% END %]
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372
77
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373 [% BLOCK LOGIN_FORM %]
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374 <form method="POST" action='/login.pl'>
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375 user: [% render(this.item('name')) %] password: [% render(this.item('password')) %] <input type="submit"/>
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376 </form>
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377 [% END %]
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378
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379 =end code html
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380
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381 =cut