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author | John Mark Bell <jmb@netsurf-browser.org> | 2011-01-29 21:51:45 +0000 |
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committer | John Mark Bell <jmb@netsurf-browser.org> | 2011-01-29 21:51:45 +0000 |
commit | 6ba000db056d7e9b70a7e154a003644046bf7e98 (patch) | |
tree | 30c43ec8543ec9cb66169721e3268ea0a7cdb76f /src/parse/properties/opacity.c | |
parent | 1b13f81b8259f4416df7b3063cb280cb977722d7 (diff) | |
download | libcss-6ba000db056d7e9b70a7e154a003644046bf7e98.tar.gz libcss-6ba000db056d7e9b70a7e154a003644046bf7e98.tar.bz2 |
Add support for opacity property
svn path=/trunk/libcss/; revision=11527
Diffstat (limited to 'src/parse/properties/opacity.c')
-rw-r--r-- | src/parse/properties/opacity.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/parse/properties/opacity.c b/src/parse/properties/opacity.c new file mode 100644 index 0000000..edad9f8 --- /dev/null +++ b/src/parse/properties/opacity.c @@ -0,0 +1,79 @@ +/* + * Licensed under the MIT License, + * http://www.opensource.org/licenses/mit-license.php + * Copyright 2010 The NetSurf Browser Project. + */ + +#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 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_opacity(css_language *c, + const parserutils_vector *vector, int *ctx, + css_style *result) +{ + int orig_ctx = *ctx; + css_error error; + const css_token *token; + bool match; + + 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; + } + + if ((token->type == CSS_TOKEN_IDENT) && (lwc_string_caseless_isequal(token->idata, c->strings[INHERIT], &match) == lwc_error_ok && match)) { + error = css_stylesheet_style_inherit(result, CSS_PROP_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_OPACITY, 0, 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; +} + |