annotate Lib/IMPL/Web/TT/Document.pm @ 124:e30bdd040fe3

IMPL::Web::TT::Form concept
author wizard
date Thu, 10 Jun 2010 02:45:59 +0400
parents 92c850d0bdb9
children 0dce0470a3d8
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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
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15 BEGIN {
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16 private property _provider => prop_all;
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17 private property _context => prop_all;
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18 public property template => prop_get | owner_set;
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19 public property presenter => prop_all, { validate => \&_validatePresenter };
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20 private property _controlClassMap => prop_all;
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21 }
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22
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23 our %CTOR = (
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24 'IMPL::DOM::Document' => sub { nodeName => 'document' }
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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->_controlClassMap({});
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31 $this->registerControlClass( Control => 'IMPL::Web::TT::Control' );
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32 $this->appendChild( $this->Create(body => 'IMPL::Web::TT::Collection') );
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33 $this->appendChild( $this->Create(head => 'IMPL::Web::TT::Collection') );
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34 }
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35
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36 sub CreateControl {
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37 my ($this,$name,$class,$args) = @_;
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38
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39 $args = {} unless ref $args eq 'HASH';
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40
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41 if (my $info = $this->_controlClassMap->{$class}) {
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42 my %nodeArgs = (%{$info->{args}},%$args);
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43 $nodeArgs{controlClass} = $class;
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44
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45 return $this->Create($name,$info->{type},\%nodeArgs);
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46 } else {
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47 die new IMPL::Exception('A control is\'t registered', $class, $name);
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48 }
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49 }
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50
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51 sub provider {
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52 my ($this,%args) = @_;
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53
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54 if (my $provider = $this->_provider) {
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55 return $provider;
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56 } else {
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57 return $this->_provider(new Template::Provider(
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58 \%args
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59 ));
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60 }
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61 }
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62
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63 sub context {
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64 my ($this) = @_;
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65
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66 if (my $ctx = $this->_context) {
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67 return $ctx;
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68 } else {
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69 return $this->_context (
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70 new Template::Context(
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71 VARIABLES => {
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72 document => $this,
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73 this => $this,
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74 render => sub {
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75 $this->_process(@_);
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76 }
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77 },
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78 TRIM => 1,
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79 RECURSION => 1,
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80 LOAD_TEMPLATES => [$this->provider]
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81 )
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82 )
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83 }
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84 }
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85
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86 sub registerControlClass {
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87 my ($this, $controlClass, $type, $args) = @_;
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88
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89 $type ||= 'IMPL::Web::TT::Control';
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90
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91 die new IMPL::InvalidArgumentException("A controlClass must be a single word",$controlClass) unless $controlClass =~ /^\w+$/;
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92
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93 eval "require $type; 1;" or die new IMPL::Exception("Failed to load a module",$type,"$@") unless eval { $type->can('new') };
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94
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95 die new IMPL::InvalidArgumentException("A type must be subclass of IMPL::DOM::Node",$type) unless $type->isa('IMPL::DOM::Node');
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96
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97 $this->_controlClassMap->{$controlClass} = {
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98 controlClass => $controlClass,
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99 type => $type,
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100 args => ref $args eq 'HASH' ? $args : {}
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101 };
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102 }
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103
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104 sub require {
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105 my ($this,$template) = @_;
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106
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107 my $doc = $this->context->template($template);
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108
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109 die new IMPL::InvalidOperationException("A specified template isn't a document",$template) unless eval{ $doc -> isa('Template::Document') };
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110
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111 my $controlClass = $doc->class;
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112 my $type = $doc->nativeType;
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113 my $controlTemplate;
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114 my $out = "";
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115
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116 die new IMPL::InvalidOperationException("A specified template isn't a control",$template) unless $controlClass;
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117
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118 if (not $this->isControlClass($controlClass)) {
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119 if ($doc->template) {
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120 $controlTemplate = $doc->blocks()->{$doc->template} || $this->context->template($doc->template);
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121 $out = $this->context->process($doc);
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122 } else {
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123 $controlTemplate = $doc;
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124 }
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125 $this->registerControlClass($controlClass,$type,{ template => $controlTemplate } );
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126 }
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127
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128 return $out;
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129 }
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130
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131 sub isControlClass {
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132 my ($this,$name) = @_;
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133 return $this->_controlClassMap->{$name} ? 1 : 0;
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134 }
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135
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136 sub _getControls {
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137 my ($this) = @_;
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138
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139 my ($node) = $this->selectNodes('controls');
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140 return $node;
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141 }
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142
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143 sub _validatePresenter {
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144 my ($this,$value) = @_;
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145
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146 die new IMPL::InvalidArgumentException("A view object is required") unless blessed($value) and $value->isa('Template::View');
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147 }
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148
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149 sub LoadFile {
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150 my ($this,$filePath,$encoding,@includes) = @_;
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151
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152 die new IMPL::InvalidArgumentException("A filePath parameter is required") unless $filePath;
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153
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154 $encoding ||= 'utf8';
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155
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156 $this->_context(undef);
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157 $this->_provider(undef);
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158
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159 my ($vol,$dir,$fileName) = File::Spec->splitpath($filePath);
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160
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161 my $inc = File::Spec->catpath($vol,$dir,'');
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162
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163 $this->provider(
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164 ENCODING => $encoding,
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165 INTERPOLATE => 1,
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166 PRE_CHOMP => 1,
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167 POST_CHOMP => 1,
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168 INCLUDE_PATH => [$inc,@includes]
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169 );
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170
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171 $this->template($this->context->template($fileName));
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172 }
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173
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174 sub AddVar {
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175 my ($this,$name,$value) = @_;
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176
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177 $this->context->stash->set($name,$value);
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178 }
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179
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180 sub title {
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181 $_[0]->template->title;
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182 }
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183
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184 sub Render {
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185 my ($this) = @_;
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186
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187 return $this->template->process($this->context);
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188 }
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189
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190 # Формирует представление для произвольных объектов
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191 sub _process {
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192 my ($this,@items) = @_;
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193
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194 my @result;
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195
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196 foreach my $item (@items) {
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197 if (blessed($item) and $item->isa('IMPL::Web::TT::Control')) {
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198 push @result, $item->Render();
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199 } elsif(blessed($item)) {
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200 if ($this->presenter) {
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201 push @result, $this->presenter->print($item);
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202 } else {
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203 push @result, $this->toString;
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204 }
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205 } else {
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206 push @result, $item;
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207 }
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208 }
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209
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210 return join '',@result;
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211 }
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212
108
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213 our $AUTOLOAD;
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214 sub AUTOLOAD {
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215 my $this = shift;
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216 my ($method) = ($AUTOLOAD =~ /(\w+)$/);
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217
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218 if($method =~ /^create(\w+)/) {
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219 my ($name,$args) = @_;
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220 return $this->CreateControl($name,$1,$args);
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221 }
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222
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223 my @result = $this->selectNodes($method);
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224
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225 return $result[0] if @result;
109
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226 carp "Looks like you have a mistake, document doesn't have a such property or child: $method";
108
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227 return;
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228 }
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229
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230 sub as_list {
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231 $_[0]->childNodes;
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232 }
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233
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234 sub Dispose {
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235 my ($this) = @_;
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236
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237 $this->template(undef);
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238 $this->_context(undef);
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239 $this->_provider(undef);
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240
108
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241 $this->supercall::Dispose();
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242 }
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243
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244 1;
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245 __END__
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246 =pod
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247
77
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248 =head1 NAME
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249
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250 C<IMPL::Web::TT::Document> - Документ, позволяющий строить представление по шаблону
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251
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252 =head1 SYNOPSIS
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253
75
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254 =begin code
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255
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256 // create new document
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257 my $doc = new IMPL::Web::TT::Document;
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258
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259 // load template
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260 $doc->loadFile('Templates/index.tt');
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261
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262 // render file
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263 print $doc->Render();
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264
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265 =end code
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266
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267 =head1 DESCRIPTION
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268
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269 C<use base qw(IMPL::DOM::Document)>
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270
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271 Документ, основанный на шаблоне Template::Toolkit. Позволяет загрузить шаблон,
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272 и сформировать окончательный документ. Является наследником C<IMPL::DOM::Node>,
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273 т.о. может быть использован для реализации DOM модели.
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274
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275 Внутри шаблона переменная C<document> ссылается на объект документа. По этой
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276 причине образуется циклическая ссылка между объектами шаблона и документом, что
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277 требует вызова метода C<Dispose> для освобождения документа.
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278
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279 =head1 METHODS
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280
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281 =over
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282
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283 =item C<CTOR()>
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284
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285 Создает новый экземпляр документа, свойство C<nodeName> устанавливается в 'C<document>'
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286
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287 =item C<$doc->LoadFile($fileName,$encoding)>
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288
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289 Загружает шаблон из файла C<$fileName>, используя кодировку C<$encoding>. Если
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290 кодировка не указана, использует utf-8.
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291
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292 =item C<$doc->Render()>
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293
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294 Возвращает данные построенные на основе загруженного шаблона.
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295
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296 =item C<$doc->Dispose()>
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297
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298 Освобождает ресурсы и помечает объект как освобожденный.
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299
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300 =back
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301
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302 =head1 DOM
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303
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304 Документ представляет собой DOM документ, состоящий из узлов, которые представляют собой данные
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305 для отображения. Для форматированого вывода используется C<template>.
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306
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307 В качестве элементов документа могут присутсвовать специальные объекты C<IMPL::Web::TT::Control>,
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308 которые внутри содержат шаблон для форматирования собственного содержимого.
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309
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310
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311
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312 Документ предоставляет ряд фнукций для работы с элементами управления.
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313
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314 =head1 TEMPLATE
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315
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316 =begin code html
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317
108
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318 [% CALL document.registerClass( 'Table', 'My::TableClass', template => 'tables/pretty.tt' ) %]
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319 [% CALL document.registerClass( 'Form' )%]
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320
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321 [% table = document.сreateTable('env') %]
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322
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323 [% FOEACH item in document.result %]
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324 [% table.rows.Add( item.get('name','value') ) %]
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325 [% END %]
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326
108
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327 [% form = document.createForm('login') %]
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328 [% form.template = 'LOGIN_FORM'%]
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329
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330 [% FOREACH item IN document.childNodes %]
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331 [%render(item)%]
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332 [% END %]
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333
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334 [% BLOCK LOGIN_FORM %]
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335 <form method="POST" action='/login.pl'>
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336 user: [% render(this.item('name')) %] password: [% render(this.item('password')) %] <input type="submit"/>
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337 </form>
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338 [% END %]
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339
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340 =end code html
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341
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342 =cut