| 1 |
package Whatpm::CSS::Parser; |
| 2 |
use strict; |
| 3 |
use Whatpm::CSS::Tokenizer qw(:token); |
| 4 |
require Whatpm::CSS::SelectorsParser; |
| 5 |
|
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sub new ($) { |
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my $self = bless {onerror => sub { }, must_level => 'm', |
| 8 |
unsupported_level => 'unsupported'}, shift; |
| 9 |
|
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return $self; |
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} # new |
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|
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sub BEFORE_STATEMENT_STATE () { 0 } |
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sub BEFORE_DECLARATION_STATE () { 1 } |
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sub IGNORED_STATEMENT_STATE () { 2 } |
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sub IGNORED_DECLARATION_STATE () { 3 } |
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|
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sub parse_char_string ($$) { |
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my $self = $_[0]; |
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|
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my $s = $_[1]; |
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pos ($s) = 0; |
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my $line = 1; |
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my $column = 0; |
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|
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my $_onerror = $self->{onerror}; |
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my $onerror = sub { |
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$_onerror->(@_, line => $line, column => $column); |
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}; |
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|
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my $tt = Whatpm::CSS::Tokenizer->new; |
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$tt->{onerror} = $onerror; |
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$tt->{get_char} = sub { |
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if (pos $s < length $s) { |
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my $c = ord substr $s, pos ($s)++, 1; |
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if ($c == 0x000A) { |
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$line++; |
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$column = 0; |
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} elsif ($c == 0x000D) { |
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unless (substr ($s, pos ($s), 1) eq "\x0A") { |
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$line++; |
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$column = 0; |
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} else { |
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$column++; |
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} |
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} else { |
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$column++; |
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} |
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return $c; |
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} else { |
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return -1; |
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} |
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}; # $tt->{get_char} |
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$tt->init; |
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|
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my $sp = Whatpm::CSS::SelectorsParser->new; |
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$sp->{onerror} = $onerror; |
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$sp->{must_level} = $self->{must_level}; |
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$sp->{pseudo_element} = $self->{pseudo_element}; |
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$sp->{pseudo_class} = $self->{pseudo_class}; |
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|
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my $nsmap = {}; |
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$sp->{lookup_namespace_uri} = sub { |
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return $nsmap->{$_[0]}; # $_[0] is '' (default namespace) or prefix |
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}; # $sp->{lookup_namespace_uri} |
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|
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## TODO: Supported pseudo classes and elements... |
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|
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require Message::DOM::CSSStyleSheet; |
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require Message::DOM::CSSRule; |
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require Message::DOM::CSSStyleDeclaration; |
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|
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my $state = BEFORE_STATEMENT_STATE; |
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my $t = $tt->get_next_token; |
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|
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my $open_rules = [[]]; |
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my $current_rules = $open_rules->[-1]; |
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my $current_decls; |
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my $closing_tokens = []; |
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my $charset_allowed = 1; |
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my $namespace_allowed = 1; |
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|
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S: { |
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if ($state == BEFORE_STATEMENT_STATE) { |
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$t = $tt->get_next_token |
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while $t->{type} == S_TOKEN or |
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$t->{type} == CDO_TOKEN or |
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$t->{type} == CDC_TOKEN; |
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|
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if ($t->{type} == ATKEYWORD_TOKEN) { |
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if ($t->{value} eq 'namespace') { |
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$t = $tt->get_next_token; |
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$t = $tt->get_next_token while $t->{type} == S_TOKEN; |
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|
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my $prefix; |
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if ($t->{type} == IDENT_TOKEN) { |
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$prefix = lc $t->{value}; |
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## TODO: Unicode lowercase |
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|
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$t = $tt->get_next_token; |
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$t = $tt->get_next_token while $t->{type} == S_TOKEN; |
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} |
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|
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if ($t->{type} == STRING_TOKEN or $t->{type} == URI_TOKEN) { |
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my $uri = $t->{value}; |
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|
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$t = $tt->get_next_token; |
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$t = $tt->get_next_token while $t->{type} == S_TOKEN; |
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|
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## ISSUE: On handling of empty namespace URI, Firefox 2 and |
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## Opera 9 work differently (See SuikaWiki:namespace). |
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## TODO: We need to check what we do once it is specced. |
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|
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if ($t->{type} == SEMICOLON_TOKEN) { |
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if ($namespace_allowed) { |
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$nsmap->{defined $prefix ? $prefix : ''} = $uri; |
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push @$current_rules, |
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Message::DOM::CSSNamespaceRule->____new ($prefix, $uri); |
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undef $charset_allowed; |
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undef $namespace_allowed; |
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} else { |
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$onerror->(type => 'at:namespace:not allowed', |
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level => $self->{must_level}, |
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token => $t); |
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} |
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|
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$t = $tt->get_next_token; |
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## Stay in the state. |
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redo S; |
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} else { |
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# |
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} |
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} else { |
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# |
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} |
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|
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$onerror->(type => 'syntax error:at:namespace', |
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level => $self->{must_level}, |
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token => $t); |
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# |
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} elsif ($t->{value} eq 'charset') { |
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$t = $tt->get_next_token; |
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$t = $tt->get_next_token while $t->{type} == S_TOKEN; |
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|
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if ($t->{type} == STRING_TOKEN) { |
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my $encoding = $t->{value}; |
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|
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$t = $tt->get_next_token; |
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$t = $tt->get_next_token while $t->{type} == S_TOKEN; |
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|
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if ($t->{type} == SEMICOLON_TOKEN) { |
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if ($charset_allowed) { |
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push @$current_rules, |
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Message::DOM::CSSCharsetRule->____new ($encoding); |
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undef $charset_allowed; |
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} else { |
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$onerror->(type => 'at:charset:not allowed', |
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level => $self->{must_level}, |
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token => $t); |
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} |
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|
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## TODO: Detect the conformance errors for @charset... |
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|
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$t = $tt->get_next_token; |
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## Stay in the state. |
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redo S; |
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} else { |
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# |
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} |
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} else { |
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# |
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} |
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|
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$onerror->(type => 'syntax error:at:charset', |
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level => $self->{must_level}, |
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token => $t); |
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# |
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## NOTE: When adding support for new at-rule, insert code |
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## "undef $charset_allowed" and "undef $namespace_token" as |
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## appropriate. |
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} else { |
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$onerror->(type => 'not supported:at:'.$t->{value}, |
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level => $self->{unsupported_level}, |
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token => $t); |
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} |
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|
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$t = $tt->get_next_token; |
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$state = IGNORED_STATEMENT_STATE; |
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redo S; |
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} elsif (@$open_rules > 1 and $t->{type} == RBRACE_TOKEN) { |
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pop @$open_rules; |
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## Stay in the state. |
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$t = $tt->get_next_token; |
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redo S; |
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} elsif ($t->{type} == EOF_TOKEN) { |
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if (@$open_rules > 1) { |
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$onerror->(type => 'syntax error:block not closed', |
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level => $self->{must_level}, |
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token => $t); |
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} |
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|
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last S; |
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} else { |
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undef $charset_allowed; |
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undef $namespace_allowed; |
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|
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($t, my $selectors) = $sp->_parse_selectors_with_tokenizer |
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($tt, LBRACE_TOKEN, $t); |
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|
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$t = $tt->get_next_token |
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while $t->{type} != LBRACE_TOKEN and $t->{type} != EOF_TOKEN; |
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|
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if ($t->{type} == LBRACE_TOKEN) { |
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$current_decls = Message::DOM::CSSStyleDeclaration->____new; |
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my $rs = Message::DOM::CSSStyleRule->____new |
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($selectors, $current_decls); |
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push @{$current_rules}, $rs if defined $selectors; |
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|
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$state = BEFORE_DECLARATION_STATE; |
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$t = $tt->get_next_token; |
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redo S; |
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} else { |
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$onerror->(type => 'syntax error:after selectors', |
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level => $self->{must_level}, |
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token => $t); |
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|
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## Stay in the state. |
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$t = $tt->get_next_token; |
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redo S; |
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} |
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} |
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} elsif ($state == BEFORE_DECLARATION_STATE) { |
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## NOTE: DELIM? in declaration will be removed: |
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## <http://csswg.inkedblade.net/spec/css2.1?s=declaration%20delim#issue-2>. |
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|
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$t = $tt->get_next_token while $t->{type} == S_TOKEN; |
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if ($t->{type} == IDENT_TOKEN) { # property |
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## TODO: If supported, ... |
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|
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$t = $tt->get_next_token; |
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# |
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} elsif ($t->{type} == RBRACE_TOKEN) { |
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$t = $tt->get_next_token; |
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$state = BEFORE_STATEMENT_STATE; |
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redo S; |
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} elsif ($t->{type} == EOF_TOKEN) { |
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$onerror->(type => 'syntax error:ruleset not closed', |
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level => $self->{must_level}, |
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token => $t); |
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## Reprocess. |
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$state = BEFORE_STATEMENT_STATE; |
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redo S; |
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} |
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|
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# |
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$state = IGNORED_DECLARATION_STATE; |
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redo S; |
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} elsif ($state == IGNORED_STATEMENT_STATE or |
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$state == IGNORED_DECLARATION_STATE) { |
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if (@$closing_tokens) { ## Something is yet in opening state. |
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if ($t->{type} == EOF_TOKEN) { |
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@$closing_tokens = (); |
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## Reprocess. |
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$state = $state == IGNORED_STATEMENT_STATE |
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? BEFORE_STATEMENT_STATE : BEFORE_DECLARATION_STATE; |
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redo S; |
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} elsif ($t->{type} == $closing_tokens->[-1]) { |
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pop @$closing_tokens; |
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if (@$closing_tokens == 0 and |
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$t->{type} == RBRACE_TOKEN and |
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$state == IGNORED_STATEMENT_STATE) { |
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$t = $tt->get_next_token; |
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$state = BEFORE_STATEMENT_STATE; |
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redo S; |
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} else { |
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$t = $tt->get_next_token; |
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## Stay in the state. |
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redo S; |
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} |
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} else { |
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# |
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} |
| 283 |
} else { |
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if ($t->{type} == SEMICOLON_TOKEN) { |
| 285 |
$t = $tt->get_next_token; |
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$state = $state == IGNORED_STATEMENT_STATE |
| 287 |
? BEFORE_STATEMENT_STATE : BEFORE_DECLARATION_STATE; |
| 288 |
redo S; |
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} elsif ($state == IGNORED_DECLARATION_STATE and |
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$t->{type} == RBRACE_TOKEN) { |
| 291 |
$t = $tt->get_next_token; |
| 292 |
$state = BEFORE_STATEMENT_STATE; |
| 293 |
redo S; |
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} elsif ($t->{type} == EOF_TOKEN) { |
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## Reprocess. |
| 296 |
$state = $state == IGNORED_STATEMENT_STATE |
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? BEFORE_STATEMENT_STATE : BEFORE_DECLARATION_STATE; |
| 298 |
redo S; |
| 299 |
} else { |
| 300 |
# |
| 301 |
} |
| 302 |
} |
| 303 |
|
| 304 |
while (not { |
| 305 |
EOF_TOKEN, 1, |
| 306 |
RBRACE_TOKEN, 1, |
| 307 |
RBRACKET_TOKEN, 1, |
| 308 |
RPAREN_TOKEN, 1, |
| 309 |
SEMICOLON_TOKEN, 1, |
| 310 |
}->{$t->{type}}) { |
| 311 |
if ($t->{type} == LBRACE_TOKEN) { |
| 312 |
push @$closing_tokens, RBRACE_TOKEN; |
| 313 |
} elsif ($t->{type} == LBRACKET_TOKEN) { |
| 314 |
push @$closing_tokens, RBRACKET_TOKEN; |
| 315 |
} elsif ($t->{type} == LPAREN_TOKEN or $t->{type} == FUNCTION_TOKEN) { |
| 316 |
push @$closing_tokens, RPAREN_TOKEN; |
| 317 |
} |
| 318 |
|
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$t = $tt->get_next_token; |
| 320 |
} |
| 321 |
|
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# |
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## Stay in the state. |
| 324 |
redo S; |
| 325 |
} else { |
| 326 |
die "$0: parse_char_string: Unknown state: $state"; |
| 327 |
} |
| 328 |
} # S |
| 329 |
|
| 330 |
my $ss = Message::DOM::CSSStyleSheet->____new |
| 331 |
(css_rules => $open_rules->[0], |
| 332 |
## TODO: href |
| 333 |
## TODO: owner_node |
| 334 |
## TODO: media |
| 335 |
type => 'text/css', ## TODO: OK? |
| 336 |
_parser => $self); |
| 337 |
return $ss; |
| 338 |
} # parse_char_string |
| 339 |
|
| 340 |
1; |
| 341 |
## $Date: 2007/12/23 11:19:23 $ |
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