diff options
Diffstat (limited to 'src/parse/properties/background_image.c')
-rw-r--r-- | src/parse/properties/background_image.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/parse/properties/background_image.c b/src/parse/properties/background_image.c new file mode 100644 index 0000000..52d3006 --- /dev/null +++ b/src/parse/properties/background_image.c @@ -0,0 +1,99 @@ +/* + * This file is part of LibCSS. + * Licensed under the MIT License, + * http://www.opensource.org/licenses/mit-license.php + * Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org> + */ + +#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 background-image + * + * \param c Parsing context + * \param vector Vector of tokens to process + * \param ctx Pointer to vector iteration context + * \param result Pointer to location to receive 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 parse_background_image(css_language *c, + const parserutils_vector *vector, int *ctx, + css_style **result) +{ + int orig_ctx = *ctx; + css_error error; + const css_token *token; + uint8_t flags = 0; + uint16_t value = 0; + uint32_t opv; + uint32_t required_size; + bool match; + lwc_string *uri = NULL; + + /* URI | IDENT (none, inherit) */ + token = parserutils_vector_iterate(vector, ctx); + if (token == NULL || (token->type != CSS_TOKEN_IDENT && + token->type != CSS_TOKEN_URI)) { + *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)) { + flags |= FLAG_INHERIT; + } else if (token->type == CSS_TOKEN_IDENT && + (lwc_string_caseless_isequal( + token->idata, c->strings[NONE], + &match) == lwc_error_ok && match)) { + value = BACKGROUND_IMAGE_NONE; + } else if (token->type == CSS_TOKEN_URI) { + value = BACKGROUND_IMAGE_URI; + + error = c->sheet->resolve(c->sheet->resolve_pw, + c->sheet->url, + token->idata, &uri); + if (error != CSS_OK) { + *ctx = orig_ctx; + return error; + } + } else { + *ctx = orig_ctx; + return CSS_INVALID; + } + + opv = buildOPV(CSS_PROP_BACKGROUND_IMAGE, flags, value); + + required_size = sizeof(opv); + if ((flags & FLAG_INHERIT) == false && value == BACKGROUND_IMAGE_URI) + required_size += sizeof(lwc_string *); + + /* Allocate result */ + error = css_stylesheet_style_create(c->sheet, required_size, result); + if (error != CSS_OK) { + *ctx = orig_ctx; + return error; + } + + /* Copy the bytecode to it */ + memcpy((*result)->bytecode, &opv, sizeof(opv)); + if ((flags & FLAG_INHERIT) == false && value == BACKGROUND_IMAGE_URI) { + /* Don't ref URI -- we want to pass ownership to the bytecode */ + memcpy((uint8_t *) (*result)->bytecode + sizeof(opv), + &uri, sizeof(lwc_string *)); + } + + return CSS_OK; +} |