From f3cf0f579347a16120df8fc1c1ec3cd1f4e6d44e Mon Sep 17 00:00:00 2001 From: Vincent Sanders Date: Sun, 2 Jan 2011 23:20:31 +0000 Subject: simple properties split in parse similar to select in preparation for future generation svn path=/trunk/libcss/; revision=11188 --- src/parse/properties/elevation.c | 145 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 145 insertions(+) create mode 100644 src/parse/properties/elevation.c (limited to 'src/parse/properties/elevation.c') diff --git a/src/parse/properties/elevation.c b/src/parse/properties/elevation.c new file mode 100644 index 0000000..d29a9b7 --- /dev/null +++ b/src/parse/properties/elevation.c @@ -0,0 +1,145 @@ +/* + * This file is part of LibCSS. + * Licensed under the MIT License, + * http://www.opensource.org/licenses/mit-license.php + * Copyright 2009 John-Mark Bell + */ + +#include +#include + +#include "bytecode/bytecode.h" +#include "bytecode/opcodes.h" +#include "parse/properties/properties.h" +#include "parse/properties/utils.h" + +/** + * Parse elevation + * + * \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_elevation(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; + css_fixed length = 0; + uint32_t unit = 0; + uint32_t required_size; + bool match; + + /* angle | IDENT(below, level, above, higher, lower, inherit) */ + token = parserutils_vector_peek(vector, *ctx); + if (token == NULL) { + *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)) { + parserutils_vector_iterate(vector, ctx); + flags = FLAG_INHERIT; + } else if (token->type == CSS_TOKEN_IDENT && + (lwc_string_caseless_isequal( + token->idata, c->strings[BELOW], + &match) == lwc_error_ok && match)) { + parserutils_vector_iterate(vector, ctx); + value = ELEVATION_BELOW; + } else if (token->type == CSS_TOKEN_IDENT && + (lwc_string_caseless_isequal( + token->idata, c->strings[LEVEL], + &match) == lwc_error_ok && match)) { + parserutils_vector_iterate(vector, ctx); + value = ELEVATION_LEVEL; + } else if (token->type == CSS_TOKEN_IDENT && + (lwc_string_caseless_isequal( + token->idata, c->strings[ABOVE], + &match) == lwc_error_ok && match)) { + parserutils_vector_iterate(vector, ctx); + value = ELEVATION_ABOVE; + } else if (token->type == CSS_TOKEN_IDENT && + (lwc_string_caseless_isequal( + token->idata, c->strings[HIGHER], + &match) == lwc_error_ok && match)) { + parserutils_vector_iterate(vector, ctx); + value = ELEVATION_HIGHER; + } else if (token->type == CSS_TOKEN_IDENT && + (lwc_string_caseless_isequal( + token->idata, c->strings[LOWER], + &match) == lwc_error_ok && match)) { + parserutils_vector_iterate(vector, ctx); + value = ELEVATION_LOWER; + } else { + error = parse_unit_specifier(c, vector, ctx, UNIT_DEG, + &length, &unit); + if (error != CSS_OK) { + *ctx = orig_ctx; + return error; + } + + if ((unit & UNIT_ANGLE) == false) { + *ctx = orig_ctx; + return CSS_INVALID; + } + + /* Valid angles lie between -90 and 90 degrees */ + if (unit == UNIT_DEG) { + if (length < FMULI(F_90, -1) || length > F_90) { + *ctx = orig_ctx; + return CSS_INVALID; + } + } else if (unit == UNIT_GRAD) { + if (length < FMULI(F_100, -1) || length > F_100) { + *ctx = orig_ctx; + return CSS_INVALID; + } + } else if (unit == UNIT_RAD) { + if (length < FMULI(F_PI_2, -1) || length > F_PI_2) { + *ctx = orig_ctx; + return CSS_INVALID; + } + } + + value = ELEVATION_ANGLE; + } + + opv = buildOPV(CSS_PROP_ELEVATION, flags, value); + + required_size = sizeof(opv); + if ((flags & FLAG_INHERIT) == false && value == ELEVATION_ANGLE) + required_size += sizeof(length) + sizeof(unit); + + /* 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 == ELEVATION_ANGLE) { + memcpy(((uint8_t *) (*result)->bytecode) + sizeof(opv), + &length, sizeof(length)); + memcpy(((uint8_t *) (*result)->bytecode) + sizeof(opv) + + sizeof(length), &unit, sizeof(unit)); + } + + return CSS_OK; +} -- cgit v1.2.3