diff options
Diffstat (limited to 'src/parse/properties/fill_opacity.c')
-rw-r--r-- | src/parse/properties/fill_opacity.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/parse/properties/fill_opacity.c b/src/parse/properties/fill_opacity.c new file mode 100644 index 0000000..caed86f --- /dev/null +++ b/src/parse/properties/fill_opacity.c @@ -0,0 +1,82 @@ +/* + * Licensed under the MIT License, + * http://www.opensource.org/licenses/mit-license.php + */ + +#include <assert.h> +#include <string.h> + +#include "bytecode/bytecode.h" +#include "bytecode/opcodes.h" +#include "parse/properties/properties.h" +#include "parse/properties/utils.h" + +/** + * Parse fill-opacity + * + * \param c Parsing context + * \param vector Vector of tokens to process + * \param ctx Pointer to vector iteration context + * \param result resulting style + * \return CSS_OK on success, + * CSS_NOMEM on memory exhaustion, + * CSS_INVALID if the input is not valid + * + * Post condition: \a *ctx is updated with the next token to process + * If the input is invalid, then \a *ctx remains unchanged. + */ +css_error css__parse_fill_opacity(css_language *c, + const parserutils_vector *vector, int32_t *ctx, + css_style *result) +{ + int32_t orig_ctx = *ctx; + css_error error; + const css_token *token; + enum flag_value flag_value; + + token = parserutils_vector_iterate(vector, ctx); + if ((token == NULL) || ((token->type != CSS_TOKEN_IDENT) && (token->type != CSS_TOKEN_NUMBER))) { + *ctx = orig_ctx; + return CSS_INVALID; + } + + flag_value = get_css_flag_value(c, token); + + if (flag_value != FLAG_VALUE__NONE) { + error = css_stylesheet_style_flag_value(result, flag_value, + CSS_PROP_FILL_OPACITY); + + } else if (token->type == CSS_TOKEN_NUMBER) { + css_fixed num = 0; + size_t consumed = 0; + + num = css__number_from_lwc_string(token->idata, false, &consumed); + /* Invalid if there are trailing characters */ + if (consumed != lwc_string_length(token->idata)) { + *ctx = orig_ctx; + return CSS_INVALID; + } + + /* Clamp to range [0,1] */ + if (num < 0) + num = 0; + if (num > INTTOFIX(1)) + num = INTTOFIX(1); + + error = css__stylesheet_style_appendOPV(result, CSS_PROP_FILL_OPACITY, 0, FILL_OPACITY_SET); + if (error != CSS_OK) { + *ctx = orig_ctx; + return error; + } + + error = css__stylesheet_style_append(result, num); + } else { + error = CSS_INVALID; + } + + if (error != CSS_OK) + *ctx = orig_ctx; + + return error; +} + |