Message/DOM/CSSStyleDeclaration.pm

package Message::DOM::CSSStyleDeclaration;
use strict;
our $VERSION=do{my @r=(q$Revision: 1.14 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
push our @ISA, 'Message::IF::CSSStyleDeclaration',
    'Message::IF::CSS2Properties';

my $serialize_value = sub ($$$) {
  my ($self, $prop_name, $value) = @_;
  if ($value->[0] eq 'NUMBER' or $value->[0] eq 'WEIGHT') {
    ## TODO: What we currently do for 'font-weight' is different from
    ## any browser for lighter/bolder cases.  We need to fix this, but
    ## how?
    return $value->[1]; ## TODO: big or small number cases?
  } elsif ($value->[0] eq 'DIMENSION') {
    return $value->[1] . $value->[2]; ## NOTE: This is what browsers do.
  } elsif ($value->[0] eq 'PERCENTAGE') {
    return $value->[1] . '%';
  } elsif ($value->[0] eq 'KEYWORD') {
    return $value->[1];
  } elsif ($value->[0] eq 'URI') {
    ## NOTE: This is what browsers do.
    return 'url('.$value->[1].')';
  } elsif ($value->[0] eq 'RGBA') {
    if ($value->[4] == 1) {
      return 'rgb('.$value->[1].', '.$value->[2].', '.$value->[3].')';
    } elsif ($value->[4] == 0) {
      ## TODO: check what browsers do...
      return 'transparent';
    } else {
      return 'rgba('.$value->[1].', '.$value->[2].', '.$value->[3].', '
          .$value->[4].')';
    }
  } elsif ($value->[0] eq 'INHERIT') {
    return 'inherit';
  } elsif ($value->[0] eq 'DECORATION') {
    my @v = ();
    push @v, 'underline' if $value->[1];
    push @v, 'overline' if $value->[2];
    push @v, 'line-through' if $value->[3];
    push @v, 'blink' if $value->[4];
    return 'none' unless @v;
    return join ' ', @v;
  } elsif ($value->[0] eq 'QUOTES') {
    return join ' ', map {'"'.$_.'"'} map {$_->[0], $_->[1]} @{$value->[1]};
    ## NOTE: The result string might not be a <'quotes'> if it contains
    ## e.g. '"'.  In addition, it might not be a <'quotes'> if 
    ## @{$value->[1]} is empty (which is unlikely as long as the implementation
    ## is not broken).
  } elsif ($value->[0] eq 'CONTENT') {
    return join ' ', map {
      $_->[0] eq 'KEYWORD' ? $_->[1] :
      $_->[0] eq 'STRING' ? '"' . $_->[1] . '"' :
      $_->[0] eq 'URI' ? 'url(' . $_->[1] . ')' :
      $_->[0] eq 'ATTR' ? 'attr(' . $_->[2] . ')' : ## TODO: prefix
      $_->[0] eq 'COUNTER' ? 'counter(' . $_->[1] . ', ' . $_->[3] . ')' :
      $_->[0] eq 'COUNTERS' ? 'counters(' . $_->[1] . ', "' . $_->[2] . '", ' . $_->[3] . ')' :
      ''
    } @{$value}[1..$#$value];
  } elsif ($value->[0] eq 'RECT') {
    ## NOTE: Four components are DIMENSIONs.
    return 'rect(' . $value->[1]->[1].$value->[1]->[2] . ', '
          . $value->[2]->[1].$value->[2]->[2] . ', '
          . $value->[3]->[1].$value->[3]->[2] . ', '
          . $value->[4]->[1].$value->[4]->[2] . ')';
  } elsif ($value->[0] eq 'SETCOUNTER' or $value->[0] eq 'ADDCOUNTER') {
    return join ' ', map {$_->[0], $_->[1]} @$value[1..$#$value];
  } elsif ($value->[0] eq 'FONT') {
    return join ', ', map {
      if ($_->[0] eq 'STRING') {
        '"'.$_->[1].'"'; ## NOTE: This is what Firefox does.
      } elsif ($_->[0] eq 'KEYWORD') {
        $_->[1]; ## NOTE: This is what Firefox does.
      } else {
        ## NOTE: This should be an error.
        '""';
      }
    } @$value[1..$#$value];
  } elsif ($value->[0] eq 'CURSOR') {
    return join ', ', map {
      if ($_->[0] eq 'URI') {
        'url('.$_->[1].')'; ## NOTE: This is what Firefox does.
      } elsif ($_->[0] eq 'KEYWORD') {
        $_->[1];
      } else {
        ## NOTE: This should be an error.
        '""';
      }
    } @$value[1..$#$value];
  } else {
    return '';
  }
}; # $serialize_value

sub ____new ($) {
  return bless \{}, $_[0];
} # ____new

sub AUTOLOAD {
  my $method_name = our $AUTOLOAD;
  $method_name =~ s/.*:://;
  return if $method_name eq 'DESTROY';

  require Whatpm::CSS::Parser;
  my $prop_def = $Whatpm::CSS::Parser::Attr->{$method_name};

  if ($prop_def) {
    no strict 'refs';
    if (defined $prop_def->{key}) {
      *{ $method_name } = sub {
        ## TODO: setter
  
        my $self = $_[0];
        my $value = $$self->{$prop_def->{key}};
        if ($value) {
          return $serialize_value->($self, $prop_def->{css}, $value->[0]);
        } else {
          return '';
        }
      };
    } elsif ($prop_def->{serialize_shorthand} or
             $prop_def->{serialize_multiple}) {
      *{ $method_name } = sub {
        ## TODO: setter
  
        my $self = $_[0];
        my $v = ($prop_def->{serialize_shorthand} or
                 $prop_def->{serialize_multiple})->($self);
        if (defined $v->{$prop_def->{css}}) {
          return $v->{$prop_def->{css}}->[0];
        } else {
          return '';
        }
        ## ISSUE: If one of shorthand component properties is !important?
      };
    } else {
      die qq<Implementation error: Can't load serializer for "$AUTOLOAD">;
    }
    goto &{ $AUTOLOAD };
  } else {
    require Carp;
    Carp::croak (qq<Can't locate method "$AUTOLOAD">);
  }
} # AUTOLOAD

use overload
    '@{}' => sub {
      tie my @list, ref $_[0], $_[0];
      return \@list;
    },
    fallback => 1;

sub TIEARRAY ($$) { $_[1] }

## |CSSStyleDeclaration| attributes

sub css_text ($;$) {
  ## TODO: setter

  ## NOTE: Where and how white space characters are inserted are 
  ## intentionally changed from those in browsers so that properties are
  ## more prettily printed.
  ## See <http://suika.fam.cx/gate/2005/sw/cssText> for what browsers do.
  ## TODO: Ordering issue.
  require Whatpm::CSS::Parser;
  my $self = $_[0];
  my $r = '';
  my %serialized;
  for (sort {$a cmp $b} grep {$$self->{$_}} keys %$$self) {
    my $prop_def = $Whatpm::CSS::Parser::Key->{$_};
    next unless $prop_def;

    if ($prop_def->{serialize_multiple}) {
      unless ($serialized{$prop_def->{serialize_multiple}}) {
        $serialized{$prop_def->{serialize_multiple}} = 1;
        my $v = $prop_def->{serialize_multiple}->($self);
        for my $prop_name (sort {$a cmp $b} keys %$v) {
          $r .= '  ' . $prop_name . ': ' . $v->{$prop_name}->[0];
          $r .= ' ! ' . $v->{$prop_name}->[1] if length $v->{$prop_name}->[1];
          $r .= ";\n";
        }
      }
    } else {
      my $value = $$self->{$_};
      my $s = $serialize_value->($self, $prop_def->{css}, $value->[0]);
      if (length $s) {
        $r .= '  ' . $prop_def->{css} . ': ' . $s;
        $r .= ' ! ' . $value->[1] if length $value->[1];
        $r .= ";\n";
      }
    }
  }
  return $r;
} # css_text

sub length ($) {
  require Whatpm::CSS::Parser;
  return scalar @{[grep {$_}
                   map { $Whatpm::CSS::Parser::Key->{$_} }
                   keys %${$_[0]}]->[$_[1]]};
} # length
*FETCHSIZE = \&length;

## TODO: STORESIZE

sub parent_rule ($) {
  return ${$_[0]}->{parent_rule};
} # parent_rule

## |CSSStyleDeclaration| methods

sub get_property_priority ($$) {
  my $prop_name = ''.$_[1];

  require Whatpm::CSS::Parser;
  my $prop_def = $Whatpm::CSS::Parser::Prop->{$prop_name};
  return '' unless defined $prop_def;

  if (defined $prop_def->{key}) {
    my $v = ${$_[0]}->{$prop_def->{key}};
    return $v ? $v->[1] : '';
  } elsif ($prop_def->{serialize_shorthand} or
           $prop_def->{serialize_multiple}) {
    my $v = ($prop_def->{serialize_shorthand} or
             $prop_def->{serialize_multiple})->($_[0]);
    if (defined $v->{$prop_def->{css}}) {
      return $v->{$prop_def->{css}}->[1];
    } else {
      return '';
    }
  } else {
    die "Implementation error: No serializer for property '$prop_name'";
  }
} # get_property_priority

sub item ($$) {
  require Whatpm::CSS::Parser;
  return '' if $_[1] < 0;
  ## TODO: ordering (should be same as that in |css_text|.
  my $v = [map {$_->{key}}
           grep {$_}
           map { $Whatpm::CSS::Parser::Key->{$_} }
           keys %${$_[0]}]->[$_[1]];
  return defined $v ? $v : '';
} # item
*FETCH = \&item;

## TODO: STORE, DELETE

sub EXISTS ($$) {
  return length $_[0]->item;
} # EXISTS

## TODO: Implement other methods and attributes

package Message::DOM::CSSComputedStyleDeclaration;
push our @ISA, 'Message::IF::CSSStyleDeclaration',
    'Message::IF::CSS2Properties';

sub ____new ($$$) {
  my $self = bless \{}, shift;
  $$self->{cascade} = shift; # Whatpm::CSS::Cascade object.
  $$self->{element} = shift; ## TODO: This link should be weaken?
  return $self;
} # ____new

sub AUTOLOAD {
  my $method_name = our $AUTOLOAD;
  $method_name =~ s/.*:://;
  return if $method_name eq 'DESTROY';

  require Whatpm::CSS::Parser;
  my $prop_def = $Whatpm::CSS::Parser::Attr->{$method_name};

  if ($prop_def) {
    no strict 'refs';
    if ($prop_def->{compute} or $prop_def->{compute_multiple}) {
      *{ $method_name } = sub {
        ## TODO: setter
  
        my $self = $_[0];
        my $value = $$self->{cascade}->get_computed_value
            ($$self->{element}, $prop_def->{css});
        if ($value) {
          return $serialize_value->($self, $prop_def->{css}, $value);
        } else {
          return '';
        }
      };
    } elsif ($prop_def->{serialize_shorthand} or
             $prop_def->{serialize_multiple}) {
      *{ $method_name } = sub {
        ## TODO: setter
        my $self = shift;

        my $v = ($prop_def->{serialize_shorthand} or
                 $prop_def->{serialize_multiple})->($self);
        if (defined $v->{$prop_def->{css}}) {
          return $v->{$prop_def->{css}}->[0];
        } else {
          return '';
        }
      };
    } else {
      ## TODO: This should be an error of the implementation.
      ## However, currently some shorthand properties does not have
      ## serializer.
      ## TODO: Remove {serialize} from shorthand properties, since
      ## they have no effect.
      warn "$0: No computed value function for $method_name";
      #die "$0: No computed value function for $method_name";
      *{ $method_name } = sub { };
    }
    goto &{ $AUTOLOAD };
  } else {
    require Carp;
    Carp::croak (qq<Can't locate method "$AUTOLOAD">);
  }
} # AUTOLOAD

use overload
    '@{}' => sub {
      tie my @list, ref $_[0], $_[0];
      return \@list;
    },
    fallback => 1;

sub TIEARRAY ($$) { $_[1] }

## |CSSStyleDeclaration| attributes

sub css_text ($;$) {
  ## TODO: error if modified

  my $self = shift;
  require Whatpm::CSS::Parser;

  ## NOTE: Where and how white space characters are inserted are 
  ## intentionally changed from those in browsers so that properties are
  ## more prettily printed.
  ## See <http://suika.fam.cx/gate/2005/sw/cssText> for what browsers do.
  ## TODO: ordering
  ## TODO: any spec?
  my $r = '';
  my %serialized;
  for my $prop_def (sort {$a->{css} cmp $b->{css}}
                    grep {$_->{compute} or
                          $_->{compute_multiple} or
                          $_->{serialize_multiple}}
                    values %$Whatpm::CSS::Parser::Prop) {
    if ($prop_def->{serialize_multiple}) {
      unless ($serialized{$prop_def->{serialize_multiple}}) {
        $serialized{$prop_def->{serialize_multiple}} = 1;
        my $v = $prop_def->{serialize_multiple}->($self);
        for my $prop_name (sort {$a cmp $b} keys %$v) {
          $r .= '  ' . $prop_name . ': ' . $v->{$prop_name}->[0];
          $r .= ' ! ' . $v->{$prop_name}->[1] if length $v->{$prop_name}->[1];
          $r .= ";\n";
        }
      }
    } else {
      my $prop_value = $$self->{cascade}->get_computed_value
          ($$self->{element}, $prop_def->{css});
      my $s = $serialize_value->($self, $prop_def->{css}, $prop_value);
      if (length $s) {
        $r .= '  ' . $prop_def->{css} . ': ' . $s;
        $r .= ";\n";
      } else {
        ## NOTE: This should be an error of the implementation.
        $r .= "  /* $prop_def->{css}: ???; */\n";
      }
    }
  }

  ## ISSUE: Should we include CSS properties that are not supported?

  return $r;
} # css_text

## TODO: What should we enumerate is unclear.
sub length ($) {
  require Whatpm::CSS::Parser;
  return scalar @{[grep {$_}
                   values %$Whatpm::CSS::Parser::Key]};
} # length
*FETCHSIZE = \&length;

## TODO: STORESIZE

## |CSSStyleDeclaration| methods

sub get_property_priority ($$) { '' }

sub item ($$) {
  require Whatpm::CSS::Parser;
  return '' if $_[1] < 0;
  ## TODO: ordering (should be same as that in |css_text|.
  my $v = [sort {$a cmp $b}
           map {$_->{css}}
           grep {$_}
           values %$Whatpm::CSS::Parser::Key]->[$_[1]];
  return defined $v ? $v : '';
} # item
*FETCH = \&item;

## TODO: STORE, DELETE

sub EXISTS ($$) {
  return length $_[0]->item;
} # EXISTS

## TODO: members

package Message::IF::CSSStyleDeclaration;
package Message::IF::CSS2Properties;

1;
## $Date: 2008/01/26 05:12:05 $
1	wakaba	1.1	package Message::DOM::CSSStyleDeclaration;
2			use strict;
3	wakaba	1.15	our $VERSION=do{my @r=(q$Revision: 1.14 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
4	wakaba	1.11	push our @ISA, 'Message::IF::CSSStyleDeclaration',
5			'Message::IF::CSS2Properties';
6	wakaba	1.1
7	wakaba	1.15	my $serialize_value = sub ($$$) {
8			my ($self, $prop_name, $value) = @_;
9			if ($value->[0] eq 'NUMBER' or $value->[0] eq 'WEIGHT') {
10			## TODO: What we currently do for 'font-weight' is different from
11			## any browser for lighter/bolder cases. We need to fix this, but
12			## how?
13			return $value->[1]; ## TODO: big or small number cases?
14			} elsif ($value->[0] eq 'DIMENSION') {
15			return $value->[1] . $value->[2]; ## NOTE: This is what browsers do.
16			} elsif ($value->[0] eq 'PERCENTAGE') {
17			return $value->[1] . '%';
18			} elsif ($value->[0] eq 'KEYWORD') {
19			return $value->[1];
20			} elsif ($value->[0] eq 'URI') {
21			## NOTE: This is what browsers do.
22			return 'url('.$value->[1].')';
23			} elsif ($value->[0] eq 'RGBA') {
24			if ($value->[4] == 1) {
25			return 'rgb('.$value->[1].', '.$value->[2].', '.$value->[3].')';
26			} elsif ($value->[4] == 0) {
27			## TODO: check what browsers do...
28			return 'transparent';
29			} else {
30			return 'rgba('.$value->[1].', '.$value->[2].', '.$value->[3].', '
31			.$value->[4].')';
32			}
33			} elsif ($value->[0] eq 'INHERIT') {
34			return 'inherit';
35			} elsif ($value->[0] eq 'DECORATION') {
36			my @v = ();
37			push @v, 'underline' if $value->[1];
38			push @v, 'overline' if $value->[2];
39			push @v, 'line-through' if $value->[3];
40			push @v, 'blink' if $value->[4];
41			return 'none' unless @v;
42			return join ' ', @v;
43			} elsif ($value->[0] eq 'QUOTES') {
44			return join ' ', map {'"'.$_.'"'} map {$_->[0], $_->[1]} @{$value->[1]};
45			## NOTE: The result string might not be a <'quotes'> if it contains
46			## e.g. '"'. In addition, it might not be a <'quotes'> if
47			## @{$value->[1]} is empty (which is unlikely as long as the implementation
48			## is not broken).
49			} elsif ($value->[0] eq 'CONTENT') {
50			return join ' ', map {
51			$_->[0] eq 'KEYWORD' ? $_->[1] :
52			$_->[0] eq 'STRING' ? '"' . $_->[1] . '"' :
53			$_->[0] eq 'URI' ? 'url(' . $_->[1] . ')' :
54			$_->[0] eq 'ATTR' ? 'attr(' . $_->[2] . ')' : ## TODO: prefix
55			$_->[0] eq 'COUNTER' ? 'counter(' . $_->[1] . ', ' . $_->[3] . ')' :
56			$_->[0] eq 'COUNTERS' ? 'counters(' . $_->[1] . ', "' . $_->[2] . '", ' . $_->[3] . ')' :
57			''
58			} @{$value}[1..$#$value];
59			} elsif ($value->[0] eq 'RECT') {
60			## NOTE: Four components are DIMENSIONs.
61			return 'rect(' . $value->[1]->[1].$value->[1]->[2] . ', '
62			. $value->[2]->[1].$value->[2]->[2] . ', '
63			. $value->[3]->[1].$value->[3]->[2] . ', '
64			. $value->[4]->[1].$value->[4]->[2] . ')';
65			} elsif ($value->[0] eq 'SETCOUNTER' or $value->[0] eq 'ADDCOUNTER') {
66			return join ' ', map {$_->[0], $_->[1]} @$value[1..$#$value];
67			} elsif ($value->[0] eq 'FONT') {
68			return join ', ', map {
69			if ($_->[0] eq 'STRING') {
70			'"'.$_->[1].'"'; ## NOTE: This is what Firefox does.
71			} elsif ($_->[0] eq 'KEYWORD') {
72			$_->[1]; ## NOTE: This is what Firefox does.
73			} else {
74			## NOTE: This should be an error.
75			'""';
76			}
77			} @$value[1..$#$value];
78			} elsif ($value->[0] eq 'CURSOR') {
79			return join ', ', map {
80			if ($_->[0] eq 'URI') {
81			'url('.$_->[1].')'; ## NOTE: This is what Firefox does.
82			} elsif ($_->[0] eq 'KEYWORD') {
83			$_->[1];
84			} else {
85			## NOTE: This should be an error.
86			'""';
87			}
88			} @$value[1..$#$value];
89			} else {
90			return '';
91			}
92			}; # $serialize_value
93
94	wakaba	1.1	sub ____new ($) {
95			return bless \{}, $_[0];
96			} # ____new
97
98	wakaba	1.3	sub AUTOLOAD {
99			my $method_name = our $AUTOLOAD;
100			$method_name =~ s/.*:://;
101			return if $method_name eq 'DESTROY';
102
103			require Whatpm::CSS::Parser;
104			my $prop_def = $Whatpm::CSS::Parser::Attr->{$method_name};
105
106			if ($prop_def) {
107			no strict 'refs';
108	wakaba	1.15	if (defined $prop_def->{key}) {
109	wakaba	1.13	*{ $method_name } = sub {
110			## TODO: setter
111
112			my $self = $_[0];
113			my $value = $$self->{$prop_def->{key}};
114			if ($value) {
115	wakaba	1.15	return $serialize_value->($self, $prop_def->{css}, $value->[0]);
116	wakaba	1.13	} else {
117			return '';
118			}
119			};
120			} elsif ($prop_def->{serialize_shorthand} or
121			$prop_def->{serialize_multiple}) {
122			*{ $method_name } = sub {
123			## TODO: setter
124
125			my $self = $_[0];
126			my $v = ($prop_def->{serialize_shorthand} or
127			$prop_def->{serialize_multiple})->($self);
128			if (defined $v->{$prop_def->{css}}) {
129			return $v->{$prop_def->{css}}->[0];
130			} else {
131			return '';
132			}
133			## ISSUE: If one of shorthand component properties is !important?
134			};
135			} else {
136			die qq<Implementation error: Can't load serializer for "$AUTOLOAD">;
137			}
138	wakaba	1.3	goto &{ $AUTOLOAD };
139			} else {
140			require Carp;
141			Carp::croak (qq<Can't locate method "$AUTOLOAD">);
142			}
143			} # AUTOLOAD
144
145	wakaba	1.11	use overload
146			'@{}' => sub {
147			tie my @list, ref $_[0], $_[0];
148			return \@list;
149			},
150			fallback => 1;
151
152			sub TIEARRAY ($$) { $_[1] }
153
154	wakaba	1.1	## \|CSSStyleDeclaration\| attributes
155
156	wakaba	1.2	sub css_text ($;$) {
157	wakaba	1.3	## TODO: setter
158
159	wakaba	1.9	## NOTE: Where and how white space characters are inserted are
160			## intentionally changed from those in browsers so that properties are
161			## more prettily printed.
162			## See <http://suika.fam.cx/gate/2005/sw/cssText> for what browsers do.
163			## TODO: Ordering issue.
164	wakaba	1.3	require Whatpm::CSS::Parser;
165			my $self = $_[0];
166			my $r = '';
167	wakaba	1.7	my %serialized;
168	wakaba	1.13	for (sort {$a cmp $b} grep {$$self->{$_}} keys %$$self) {
169	wakaba	1.3	my $prop_def = $Whatpm::CSS::Parser::Key->{$_};
170			next unless $prop_def;
171	wakaba	1.7
172			if ($prop_def->{serialize_multiple}) {
173			unless ($serialized{$prop_def->{serialize_multiple}}) {
174			$serialized{$prop_def->{serialize_multiple}} = 1;
175			my $v = $prop_def->{serialize_multiple}->($self);
176			for my $prop_name (sort {$a cmp $b} keys %$v) {
177	wakaba	1.14	$r .= ' ' . $prop_name . ': ' . $v->{$prop_name}->[0];
178			$r .= ' ! ' . $v->{$prop_name}->[1] if length $v->{$prop_name}->[1];
179			$r .= ";\n";
180	wakaba	1.7	}
181			}
182			} else {
183			my $value = $$self->{$_};
184	wakaba	1.15	my $s = $serialize_value->($self, $prop_def->{css}, $value->[0]);
185	wakaba	1.10	if (length $s) {
186	wakaba	1.7	$r .= ' ' . $prop_def->{css} . ': ' . $s;
187	wakaba	1.10	$r .= ' ! ' . $value->[1] if length $value->[1];
188	wakaba	1.7	$r .= ";\n";
189			}
190	wakaba	1.3	}
191			}
192			return $r;
193	wakaba	1.2	} # css_text
194
195	wakaba	1.11	sub length ($) {
196			require Whatpm::CSS::Parser;
197			return scalar @{[grep {$_}
198			map { $Whatpm::CSS::Parser::Key->{$_} }
199			keys %${$_[0]}]->[$_[1]]};
200			} # length
201			*FETCHSIZE = \&length;
202
203			## TODO: STORESIZE
204
205	wakaba	1.1	sub parent_rule ($) {
206			return ${$_[0]}->{parent_rule};
207			} # parent_rule
208
209	wakaba	1.7	## \|CSSStyleDeclaration\| methods
210
211			sub get_property_priority ($$) {
212			my $prop_name = ''.$_[1];
213
214			require Whatpm::CSS::Parser;
215			my $prop_def = $Whatpm::CSS::Parser::Prop->{$prop_name};
216			return '' unless defined $prop_def;
217
218	wakaba	1.15	if (defined $prop_def->{key}) {
219	wakaba	1.14	my $v = ${$_[0]}->{$prop_def->{key}};
220			return $v ? $v->[1] : '';
221			} elsif ($prop_def->{serialize_shorthand} or
222			$prop_def->{serialize_multiple}) {
223			my $v = ($prop_def->{serialize_shorthand} or
224			$prop_def->{serialize_multiple})->($_[0]);
225			if (defined $v->{$prop_def->{css}}) {
226			return $v->{$prop_def->{css}}->[1];
227			} else {
228			return '';
229			}
230			} else {
231			die "Implementation error: No serializer for property '$prop_name'";
232			}
233	wakaba	1.7	} # get_property_priority
234
235	wakaba	1.11	sub item ($$) {
236			require Whatpm::CSS::Parser;
237			return '' if $_[1] < 0;
238			## TODO: ordering (should be same as that in \|css_text\|.
239			my $v = [map {$_->{key}}
240			grep {$_}
241			map { $Whatpm::CSS::Parser::Key->{$_} }
242			keys %${$_[0]}]->[$_[1]];
243			return defined $v ? $v : '';
244			} # item
245			*FETCH = \&item;
246
247			## TODO: STORE, DELETE
248
249			sub EXISTS ($$) {
250			return length $_[0]->item;
251			} # EXISTS
252
253	wakaba	1.1	## TODO: Implement other methods and attributes
254
255	wakaba	1.4	package Message::DOM::CSSComputedStyleDeclaration;
256	wakaba	1.11	push our @ISA, 'Message::IF::CSSStyleDeclaration',
257			'Message::IF::CSS2Properties';
258	wakaba	1.4
259			sub ____new ($$$) {
260			my $self = bless \{}, shift;
261			$$self->{cascade} = shift; # Whatpm::CSS::Cascade object.
262			$$self->{element} = shift; ## TODO: This link should be weaken?
263			return $self;
264			} # ____new
265
266	wakaba	1.7	sub AUTOLOAD {
267			my $method_name = our $AUTOLOAD;
268			$method_name =~ s/.*:://;
269			return if $method_name eq 'DESTROY';
270
271			require Whatpm::CSS::Parser;
272			my $prop_def = $Whatpm::CSS::Parser::Attr->{$method_name};
273
274			if ($prop_def) {
275			no strict 'refs';
276	wakaba	1.13	if ($prop_def->{compute} or $prop_def->{compute_multiple}) {
277			*{ $method_name } = sub {
278			## TODO: setter
279
280			my $self = $_[0];
281	wakaba	1.12	my $value = $$self->{cascade}->get_computed_value
282			($$self->{element}, $prop_def->{css});
283			if ($value) {
284	wakaba	1.15	return $serialize_value->($self, $prop_def->{css}, $value);
285	wakaba	1.12	} else {
286			return '';
287			}
288	wakaba	1.13	};
289			} elsif ($prop_def->{serialize_shorthand} or
290			$prop_def->{serialize_multiple}) {
291			*{ $method_name } = sub {
292			## TODO: setter
293			my $self = shift;
294
295			my $v = ($prop_def->{serialize_shorthand} or
296			$prop_def->{serialize_multiple})->($self);
297	wakaba	1.12	if (defined $v->{$prop_def->{css}}) {
298	wakaba	1.13	return $v->{$prop_def->{css}}->[0];
299	wakaba	1.12	} else {
300			return '';
301			}
302	wakaba	1.13	};
303			} else {
304			## TODO: This should be an error of the implementation.
305			## However, currently some shorthand properties does not have
306			## serializer.
307			## TODO: Remove {serialize} from shorthand properties, since
308			## they have no effect.
309			warn "$0: No computed value function for $method_name";
310			#die "$0: No computed value function for $method_name";
311			*{ $method_name } = sub { };
312			}
313	wakaba	1.7	goto &{ $AUTOLOAD };
314			} else {
315			require Carp;
316			Carp::croak (qq<Can't locate method "$AUTOLOAD">);
317			}
318			} # AUTOLOAD
319
320	wakaba	1.11	use overload
321			'@{}' => sub {
322			tie my @list, ref $_[0], $_[0];
323			return \@list;
324			},
325			fallback => 1;
326
327			sub TIEARRAY ($$) { $_[1] }
328
329			## \|CSSStyleDeclaration\| attributes
330
331	wakaba	1.4	sub css_text ($;$) {
332			## TODO: error if modified
333
334			my $self = shift;
335			require Whatpm::CSS::Parser;
336
337	wakaba	1.9	## NOTE: Where and how white space characters are inserted are
338			## intentionally changed from those in browsers so that properties are
339			## more prettily printed.
340			## See <http://suika.fam.cx/gate/2005/sw/cssText> for what browsers do.
341	wakaba	1.4	## TODO: ordering
342			## TODO: any spec?
343			my $r = '';
344	wakaba	1.7	my %serialized;
345	wakaba	1.6	for my $prop_def (sort {$a->{css} cmp $b->{css}}
346	wakaba	1.7	grep {$_->{compute} or
347			$_->{compute_multiple} or
348			$_->{serialize_multiple}}
349	wakaba	1.6	values %$Whatpm::CSS::Parser::Prop) {
350	wakaba	1.7	if ($prop_def->{serialize_multiple}) {
351			unless ($serialized{$prop_def->{serialize_multiple}}) {
352			$serialized{$prop_def->{serialize_multiple}} = 1;
353			my $v = $prop_def->{serialize_multiple}->($self);
354			for my $prop_name (sort {$a cmp $b} keys %$v) {
355	wakaba	1.14	$r .= ' ' . $prop_name . ': ' . $v->{$prop_name}->[0];
356			$r .= ' ! ' . $v->{$prop_name}->[1] if length $v->{$prop_name}->[1];
357			$r .= ";\n";
358	wakaba	1.7	}
359			}
360	wakaba	1.5	} else {
361	wakaba	1.7	my $prop_value = $$self->{cascade}->get_computed_value
362			($$self->{element}, $prop_def->{css});
363	wakaba	1.15	my $s = $serialize_value->($self, $prop_def->{css}, $prop_value);
364	wakaba	1.10	if (length $s) {
365	wakaba	1.7	$r .= ' ' . $prop_def->{css} . ': ' . $s;
366			$r .= ";\n";
367			} else {
368			## NOTE: This should be an error of the implementation.
369			$r .= " /* $prop_def->{css}: ???; */\n";
370			}
371	wakaba	1.4	}
372			}
373	wakaba	1.6
374			## ISSUE: Should we include CSS properties that are not supported?
375
376	wakaba	1.4	return $r;
377			} # css_text
378
379	wakaba	1.11	## TODO: What should we enumerate is unclear.
380			sub length ($) {
381			require Whatpm::CSS::Parser;
382			return scalar @{[grep {$_}
383			values %$Whatpm::CSS::Parser::Key]};
384			} # length
385			*FETCHSIZE = \&length;
386
387			## TODO: STORESIZE
388
389	wakaba	1.7	## \|CSSStyleDeclaration\| methods
390
391	wakaba	1.10	sub get_property_priority ($$) { '' }
392	wakaba	1.7
393	wakaba	1.11	sub item ($$) {
394			require Whatpm::CSS::Parser;
395			return '' if $_[1] < 0;
396			## TODO: ordering (should be same as that in \|css_text\|.
397			my $v = [sort {$a cmp $b}
398			map {$_->{css}}
399			grep {$_}
400			values %$Whatpm::CSS::Parser::Key]->[$_[1]];
401			return defined $v ? $v : '';
402			} # item
403			*FETCH = \&item;
404
405			## TODO: STORE, DELETE
406
407			sub EXISTS ($$) {
408			return length $_[0]->item;
409			} # EXISTS
410
411	wakaba	1.4	## TODO: members
412
413	wakaba	1.1	package Message::IF::CSSStyleDeclaration;
414	wakaba	1.11	package Message::IF::CSS2Properties;
415	wakaba	1.1
416			1;
417	wakaba	1.15	## $Date: 2008/01/26 05:12:05 $