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csstokenizer: Add gtk_css_token_is_preserved()

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This commit is contained in:
Benjamin Otte 2019-03-18 05:32:05 +01:00
parent 661720ef8b
commit d4d46e8125
2 changed files with 79 additions and 0 deletions
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77
gtk/css/gtkcsstokenizer.c
View File

@ -268,6 +268,83 @@ gtk_css_token_is_finite (const GtkCssToken *token)
}
}
/*
* gtk_css_token_is_preserved:
* @token: a #GtkCssToken
* @out_closing: (allow-none): Type of the token that closes a block
* started with this token
*
* A token is considered preserved when it does not start a block.
*
* Tokens that start a block require different error recovery when parsing,
* so CSS parsers want to look at this function
*
* Returns: %TRUE if the token is considered preserved.
**/
gboolean
gtk_css_token_is_preserved (const GtkCssToken *token,
GtkCssTokenType *out_closing)
{
switch (token->type)
{
case GTK_CSS_TOKEN_FUNCTION:
case GTK_CSS_TOKEN_OPEN_PARENS:
if (out_closing)
*out_closing = GTK_CSS_TOKEN_CLOSE_PARENS;
return FALSE;
case GTK_CSS_TOKEN_OPEN_SQUARE:
if (out_closing)
*out_closing = GTK_CSS_TOKEN_CLOSE_SQUARE;
return FALSE;
case GTK_CSS_TOKEN_OPEN_CURLY:
if (out_closing)
*out_closing = GTK_CSS_TOKEN_CLOSE_CURLY;
return FALSE;
default:
g_assert_not_reached ();
case GTK_CSS_TOKEN_EOF:
case GTK_CSS_TOKEN_WHITESPACE:
case GTK_CSS_TOKEN_STRING:
case GTK_CSS_TOKEN_URL:
case GTK_CSS_TOKEN_PERCENTAGE:
case GTK_CSS_TOKEN_CLOSE_PARENS:
case GTK_CSS_TOKEN_CLOSE_SQUARE:
case GTK_CSS_TOKEN_CLOSE_CURLY:
case GTK_CSS_TOKEN_COMMA:
case GTK_CSS_TOKEN_COLON:
case GTK_CSS_TOKEN_SEMICOLON:
case GTK_CSS_TOKEN_CDC:
case GTK_CSS_TOKEN_CDO:
case GTK_CSS_TOKEN_INCLUDE_MATCH:
case GTK_CSS_TOKEN_DASH_MATCH:
case GTK_CSS_TOKEN_PREFIX_MATCH:
case GTK_CSS_TOKEN_SUFFIX_MATCH:
case GTK_CSS_TOKEN_SUBSTRING_MATCH:
case GTK_CSS_TOKEN_COLUMN:
case GTK_CSS_TOKEN_COMMENT:
case GTK_CSS_TOKEN_IDENT:
case GTK_CSS_TOKEN_AT_KEYWORD:
case GTK_CSS_TOKEN_HASH_UNRESTRICTED:
case GTK_CSS_TOKEN_HASH_ID:
case GTK_CSS_TOKEN_DELIM:
case GTK_CSS_TOKEN_SIGNED_INTEGER:
case GTK_CSS_TOKEN_SIGNLESS_INTEGER:
case GTK_CSS_TOKEN_SIGNED_NUMBER:
case GTK_CSS_TOKEN_SIGNLESS_NUMBER:
case GTK_CSS_TOKEN_BAD_STRING:
case GTK_CSS_TOKEN_BAD_URL:
case GTK_CSS_TOKEN_SIGNED_INTEGER_DIMENSION:
case GTK_CSS_TOKEN_SIGNLESS_INTEGER_DIMENSION:
case GTK_CSS_TOKEN_DIMENSION:
if (out_closing)
*out_closing = GTK_CSS_TOKEN_EOF;
return TRUE;
}
}
gboolean
gtk_css_token_is_ident (const GtkCssToken *token,
const char *ident)

2
gtk/css/gtkcsstokenizerprivate.h
View File

@ -118,6 +118,8 @@ struct _GtkCssLocation
void gtk_css_token_clear (GtkCssToken *token);
gboolean gtk_css_token_is_finite (const GtkCssToken *token);
gboolean gtk_css_token_is_preserved (const GtkCssToken *token,
GtkCssTokenType *out_closing);
#define gtk_css_token_is(token, _type) ((token)->type == (_type))
gboolean gtk_css_token_is_ident (const GtkCssToken *token,
const char *ident);