[project @ 2003-04-01 20:18:18 by bursa]
CSS parser progress. svn path=/import/netsurf/; revision=110
This commit is contained in:
James Bursa
parent
5d371fb47e
commit
c520b30412
104
css/parser.y
104
css/parser.y
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@ -1,15 +1,15 @@
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/**
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* $Id: parser.y,v 1.1 2003/03/25 21:03:14 bursa Exp $
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* $Id: parser.y,v 1.2 2003/04/01 20:18:18 bursa Exp $
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*/
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/*
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/*
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CSS parser using the lemon parser generator
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see CSS2 Specification, chapter 4
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http://www.w3.org/TR/REC-CSS2/syndata.html,
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and errata
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http://www.w3.org/Style/css2-updates/REC-CSS2-19980512-errata
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http://www.w3.org/Style/css2-updates/REC-CSS2-19980512-errata
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stylesheet : [ CDO | CDC | S | statement ]*;
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statement : ruleset | at-rule;
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@ -27,23 +27,16 @@ any : [ IDENT | NUMBER | PERCENTAGE | DIMENSION | STRING
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Note: S, CDO, CDC will be stripped out by the scanner
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*/
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stylesheet ::= statement_list(A).
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{ *stylesheet = A; }
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stylesheet ::= statement_list.
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statement_list(A) ::= .
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{ A = 0; }
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statement_list(A) ::= statement(B) statement_list(C).
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{ if (B == 0) { A = C; } else { B->next = C; A = B; } }
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statement_list ::= .
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statement_list ::= statement_list statement.
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statement(A) ::= ruleset(B).
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{ A = B; }
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statement(A) ::= at_rule(B).
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{ A = B; }
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statement ::= ruleset.
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statement ::= at_rule.
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at_rule(A) ::= ATKEYWORD any_list block.
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{ A = css_new_node(CSS_NODE_AT_RULE, 0, 0, 0); }
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at_rule(A) ::= ATKEYWORD any_list SEMI.
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{ A = css_new_node(CSS_NODE_AT_RULE, 0, 0, 0); }
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at_rule ::= ATKEYWORD any_list block.
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at_rule ::= ATKEYWORD any_list SEMI.
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block ::= LBRACE block_body RBRACE.
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block_body ::= .
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@ -52,10 +45,11 @@ block_body ::= block_body block.
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block_body ::= block_body ATKEYWORD.
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block_body ::= block_body SEMI.
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ruleset(A) ::= selector(B) LBRACE declaration_list(C) RBRACE.
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{ A = css_new_node(CSS_NODE_RULESET, 0, B, C); }
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ruleset(A) ::= LBRACE declaration_list RBRACE.
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{ A = 0; } /* this form of ruleset not used in CSS2 */
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ruleset ::= selector(A) LBRACE declaration_list(B) RBRACE.
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{ css_add_ruleset(stylesheet, A, B);
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css_free_node(A); css_free_node(B); }
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ruleset ::= LBRACE declaration_list RBRACE.
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/* this form of ruleset not used in CSS2 */
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selector(A) ::= any_list_1(B).
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{ A = B; }
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@ -70,7 +64,7 @@ declaration_list(A) ::= declaration(B) SEMI declaration_list(C).
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{ B->next = C; A = B; }
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declaration(A) ::= property(B) COLON value(C).
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{ A = css_new_node(CSS_NODE_DECLARATION, B, C, 0); }
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{ A = css_new_node(NODE_DECLARATION, B, C, 0); }
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property(A) ::= IDENT(B).
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{ A = B; }
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@ -91,65 +85,67 @@ any_list(A) ::= any(B) any_list(C).
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any_list_1(A) ::= any(B) any_list(C).
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{ B->next = C; A = B; }
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any(A) ::= IDENT(B).
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{ A = css_new_node(CSS_NODE_IDENT, B, 0, 0); }
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{ A = css_new_node(NODE_IDENT, B, 0, 0); }
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any(A) ::= NUMBER(B).
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{ A = css_new_node(CSS_NODE_NUMBER, B, 0, 0); }
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{ A = css_new_node(NODE_NUMBER, B, 0, 0); }
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any(A) ::= PERCENTAGE(B).
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{ A = css_new_node(CSS_NODE_PERCENTAGE, B, 0, 0); }
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{ A = css_new_node(NODE_PERCENTAGE, B, 0, 0); }
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any(A) ::= DIMENSION(B).
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{ A = css_new_node(CSS_NODE_DIMENSION, B, 0, 0); }
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{ A = css_new_node(NODE_DIMENSION, B, 0, 0); }
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any(A) ::= STRING(B).
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{ A = css_new_node(CSS_NODE_STRING, B, 0, 0); }
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{ A = css_new_node(NODE_STRING, B, 0, 0); }
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any(A) ::= DELIM(B).
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{ A = css_new_node(CSS_NODE_DELIM, B, 0, 0); }
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{ A = css_new_node(NODE_DELIM, B, 0, 0); }
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any(A) ::= URI(B).
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{ A = css_new_node(CSS_NODE_URI, B, 0, 0); }
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{ A = css_new_node(NODE_URI, B, 0, 0); }
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any(A) ::= HASH(B).
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{ A = css_new_node(CSS_NODE_HASH, B, 0, 0); }
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{ A = css_new_node(NODE_HASH, B, 0, 0); }
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any(A) ::= UNICODE_RANGE(B).
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{ A = css_new_node(CSS_NODE_UNICODE_RANGE, B, 0, 0); }
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{ A = css_new_node(NODE_UNICODE_RANGE, B, 0, 0); }
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any(A) ::= INCLUDES(B).
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{ A = css_new_node(CSS_NODE_INCLUDES, B, 0, 0); }
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{ A = css_new_node(NODE_INCLUDES, B, 0, 0); }
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any(A) ::= FUNCTION(B).
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{ A = css_new_node(CSS_NODE_FUNCTION, B, 0, 0); }
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{ A = css_new_node(NODE_FUNCTION, B, 0, 0); }
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any(A) ::= DASHMATCH(B).
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{ A = css_new_node(CSS_NODE_DASHMATCH, B, 0, 0); }
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{ A = css_new_node(NODE_DASHMATCH, B, 0, 0); }
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any(A) ::= COLON(B).
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{ A = css_new_node(CSS_NODE_COLON, B, 0, 0); }
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{ A = css_new_node(NODE_COLON, B, 0, 0); }
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any(A) ::= LPAREN any_list(B) RPAREN.
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{ A = css_new_node(CSS_NODE_PAREN, 0, B, 0); }
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{ A = css_new_node(NODE_PAREN, 0, B, 0); }
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any(A) ::= LBRAC any_list(B) RBRAC.
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{ A = css_new_node(CSS_NODE_BRAC, 0, B, 0); }
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{ A = css_new_node(NODE_BRAC, 0, B, 0); }
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/* lemon directives */
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%extra_argument { struct css_node **stylesheet }
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%include { #include "netsurf/css/css.h"
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%extra_argument { struct css_stylesheet *stylesheet }
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%include {
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#define CSS_INTERNALS
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#include "netsurf/css/css.h"
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#include "netsurf/utils/utils.h" }
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%name css_parser_
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%token_type { char* }
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%token_destructor { xfree($$); }
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%type stylesheet { struct css_node * }
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%type statement_list { struct css_node * }
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%type statement { struct css_node * }
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%type at_rule { struct css_node * }
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%type ruleset { struct css_node * }
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%type selector { struct css_node * }
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%type declaration_list { struct css_node * }
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%type declaration { struct css_node * }
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%type value { struct css_node * }
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%type any_list { struct css_node * }
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%type any_list_1 { struct css_node * }
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%type any { struct css_node * }
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/*%type stylesheet { struct node * }
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%type statement_list { struct node * }
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%type statement { struct node * }
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%type at_rule { struct node * }
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%type ruleset { struct node * }*/
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%type selector { struct node * }
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%type declaration_list { struct node * }
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%type declaration { struct node * }
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%type value { struct node * }
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%type any_list { struct node * }
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%type any_list_1 { struct node * }
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%type any { struct node * }
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%destructor stylesheet { css_free_node($$); }
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/*%destructor stylesheet { css_free_node($$); }
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%destructor statement_list { css_free_node($$); }
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%destructor statement { css_free_node($$); }
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%destructor at_rule { css_free_node($$); }
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%destructor ruleset { css_free_node($$); }
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%destructor ruleset { css_free_node($$); }*/
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%destructor selector { css_free_node($$); }
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%destructor declaration_list { css_free_node($$); }
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%destructor declaration { css_free_node($$); }
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@ -158,5 +154,5 @@ any(A) ::= LBRAC any_list(B) RBRAC.
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%destructor any_list_1 { css_free_node($$); }
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%destructor any { css_free_node($$); }
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%parse_failure { *stylesheet = 0; }
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/*%parse_failure { *stylesheet = 0; }*/
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