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author | John Mark Bell <jmb@netsurf-browser.org> | 2009-05-27 00:33:26 +0000 |
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committer | John Mark Bell <jmb@netsurf-browser.org> | 2009-05-27 00:33:26 +0000 |
commit | 94074cb3afd111b15d46e108593b0b4db40e141a (patch) | |
tree | 75cdc5f09a64b88819914d1fb4192b02ef2df5a1 /src/parse/properties/effects_stacking.c | |
parent | 62efdd1bb64dcdec770c43df5e8ea2c56cf6bdb4 (diff) | |
download | libcss-94074cb3afd111b15d46e108593b0b4db40e141a.tar.gz libcss-94074cb3afd111b15d46e108593b0b4db40e141a.tar.bz2 |
Split out visual effects and stacking property parsers
svn path=/trunk/libcss/; revision=7570
Diffstat (limited to 'src/parse/properties/effects_stacking.c')
-rw-r--r-- | src/parse/properties/effects_stacking.c | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/src/parse/properties/effects_stacking.c b/src/parse/properties/effects_stacking.c new file mode 100644 index 0000000..9659f80 --- /dev/null +++ b/src/parse/properties/effects_stacking.c @@ -0,0 +1,286 @@ +/* + * 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 <string.h> + +#include "bytecode/bytecode.h" +#include "bytecode/opcodes.h" +#include "parse/properties/properties.h" +#include "parse/properties/utils.h" + +css_error parse_clip(css_language *c, + const parserutils_vector *vector, int *ctx, + css_style **result) +{ + css_error error; + const css_token *token; + uint8_t flags = 0; + uint16_t value = 0; + uint32_t opv; + int num_lengths = 0; + css_fixed length[4] = { 0 }; + uint32_t unit[4] = { 0 }; + uint32_t required_size; + + /* FUNCTION(rect) [ [ IDENT(auto) | length ] CHAR(,)? ]{3} + * [ IDENT(auto) | length ] CHAR{)} | + * IDENT(auto, inherit) */ + token = parserutils_vector_iterate(vector, ctx); + if (token == NULL) + return CSS_INVALID; + + if (token->type == CSS_TOKEN_IDENT && + token->ilower == c->strings[INHERIT]) { + flags = FLAG_INHERIT; + } else if (token->type == CSS_TOKEN_IDENT && + token->ilower == c->strings[AUTO]) { + value = CLIP_AUTO; + } else if (token->type == CSS_TOKEN_FUNCTION && + token->ilower == c->strings[RECT]) { + int i; + value = CLIP_SHAPE_RECT; + + for (i = 0; i < 4; i++) { + consumeWhitespace(vector, ctx); + + token = parserutils_vector_peek(vector, *ctx); + if (token == NULL) + return CSS_INVALID; + + if (token->type == CSS_TOKEN_IDENT) { + /* Slightly magical way of generating the auto + * values. These are bits 3-6 of the value. */ + if (token->ilower == c->strings[AUTO]) + value |= 1 << (i + 3); + else + return CSS_INVALID; + + parserutils_vector_iterate(vector, ctx); + } else { + error = parse_unit_specifier(c, vector, ctx, + UNIT_PX, + &length[num_lengths], + &unit[num_lengths]); + if (error != CSS_OK) + return error; + + if (unit[num_lengths] & UNIT_ANGLE || + unit[num_lengths] & UNIT_TIME || + unit[num_lengths] & UNIT_FREQ || + unit[num_lengths] & UNIT_PCT) + return CSS_INVALID; + + num_lengths++; + } + + consumeWhitespace(vector, ctx); + + /* Consume optional comma after first 3 parameters */ + if (i < 3) { + token = parserutils_vector_peek(vector, *ctx); + if (token == NULL) + return CSS_INVALID; + + if (tokenIsChar(token, ',')) + parserutils_vector_iterate(vector, ctx); + } + } + + consumeWhitespace(vector, ctx); + + /* Finally, consume closing parenthesis */ + token = parserutils_vector_iterate(vector, ctx); + if (token == NULL || tokenIsChar(token, ')') == false) + return CSS_INVALID; + } else { + return CSS_INVALID; + } + + error = parse_important(c, vector, ctx, &flags); + if (error != CSS_OK) + return error; + + opv = buildOPV(CSS_PROP_CLIP, flags, value); + + required_size = sizeof(opv); + if ((flags & FLAG_INHERIT) == false && + (value & CLIP_SHAPE_MASK) == CLIP_SHAPE_RECT) { + required_size += + num_lengths * (sizeof(length[0]) + sizeof(unit[0])); + } + + /* Allocate result */ + error = css_stylesheet_style_create(c->sheet, required_size, result); + if (error != CSS_OK) + return error; + + /* Copy the bytecode to it */ + memcpy((*result)->bytecode, &opv, sizeof(opv)); + if ((flags & FLAG_INHERIT) == false && + (value & CLIP_SHAPE_MASK) == CLIP_SHAPE_RECT) { + int i; + uint8_t *ptr = ((uint8_t *) (*result)->bytecode) + sizeof(opv); + + for (i = 0; i < num_lengths; i++) { + memcpy(ptr, &length[i], sizeof(length[i])); + ptr += sizeof(length[i]); + memcpy(ptr, &unit[i], sizeof(unit[i])); + ptr += sizeof(unit[i]); + } + } + + return CSS_OK; +} + +css_error parse_overflow(css_language *c, + const parserutils_vector *vector, int *ctx, + css_style **result) +{ + css_error error; + const css_token *ident; + uint8_t flags = 0; + uint16_t value = 0; + uint32_t opv; + + /* IDENT (visible, hidden, scroll, auto, inherit) */ + ident = parserutils_vector_iterate(vector, ctx); + if (ident == NULL || ident->type != CSS_TOKEN_IDENT) + return CSS_INVALID; + + error = parse_important(c, vector, ctx, &flags); + if (error != CSS_OK) + return error; + + if (ident->ilower == c->strings[INHERIT]) { + flags |= FLAG_INHERIT; + } else if (ident->ilower == c->strings[VISIBLE]) { + value = OVERFLOW_VISIBLE; + } else if (ident->ilower == c->strings[HIDDEN]) { + value = OVERFLOW_HIDDEN; + } else if (ident->ilower == c->strings[SCROLL]) { + value = OVERFLOW_SCROLL; + } else if (ident->ilower == c->strings[AUTO]) { + value = OVERFLOW_AUTO; + } else + return CSS_INVALID; + + opv = buildOPV(CSS_PROP_OVERFLOW, flags, value); + + /* Allocate result */ + error = css_stylesheet_style_create(c->sheet, sizeof(opv), result); + if (error != CSS_OK) + return error; + + /* Copy the bytecode to it */ + memcpy((*result)->bytecode, &opv, sizeof(opv)); + + return CSS_OK; +} + +css_error parse_visibility(css_language *c, + const parserutils_vector *vector, int *ctx, + css_style **result) +{ + css_error error; + const css_token *ident; + uint8_t flags = 0; + uint16_t value = 0; + uint32_t opv; + + /* IDENT (visible, hidden, collapse, inherit) */ + ident = parserutils_vector_iterate(vector, ctx); + if (ident == NULL || ident->type != CSS_TOKEN_IDENT) + return CSS_INVALID; + + error = parse_important(c, vector, ctx, &flags); + if (error != CSS_OK) + return error; + + if (ident->ilower == c->strings[INHERIT]) { + flags |= FLAG_INHERIT; + } else if (ident->ilower == c->strings[VISIBLE]) { + value = VISIBILITY_VISIBLE; + } else if (ident->ilower == c->strings[HIDDEN]) { + value = VISIBILITY_HIDDEN; + } else if (ident->ilower == c->strings[COLLAPSE]) { + value = VISIBILITY_COLLAPSE; + } else + return CSS_INVALID; + + opv = buildOPV(CSS_PROP_VISIBILITY, flags, value); + + /* Allocate result */ + error = css_stylesheet_style_create(c->sheet, sizeof(opv), result); + if (error != CSS_OK) + return error; + + /* Copy the bytecode to it */ + memcpy((*result)->bytecode, &opv, sizeof(opv)); + + return CSS_OK; +} + +css_error parse_z_index(css_language *c, + const parserutils_vector *vector, int *ctx, + css_style **result) +{ + css_error error; + const css_token *token; + uint8_t flags = 0; + uint16_t value = 0; + uint32_t opv; + css_fixed num = 0; + uint32_t required_size; + + /* <integer> | IDENT (auto, inherit) */ + token = parserutils_vector_iterate(vector, ctx); + if (token == NULL || (token->type != CSS_TOKEN_IDENT && + token->type != CSS_TOKEN_NUMBER)) + return CSS_INVALID; + + error = parse_important(c, vector, ctx, &flags); + if (error != CSS_OK) + return error; + + if (token->type == CSS_TOKEN_IDENT && + token->ilower == c->strings[INHERIT]) { + flags |= FLAG_INHERIT; + } else if (token->type == CSS_TOKEN_IDENT && + token->ilower == c->strings[AUTO]) { + value = Z_INDEX_AUTO; + } else if (token->type == CSS_TOKEN_NUMBER) { + size_t consumed = 0; + num = number_from_lwc_string(token->ilower, true, &consumed); + /* Invalid if there are trailing characters */ + if (consumed != lwc_string_length(token->ilower)) + return CSS_INVALID; + + value = Z_INDEX_SET; + } else + return CSS_INVALID; + + opv = buildOPV(CSS_PROP_Z_INDEX, flags, value); + + required_size = sizeof(opv); + if ((flags & FLAG_INHERIT) == false && value == Z_INDEX_SET) + required_size += sizeof(num); + + /* Allocate result */ + error = css_stylesheet_style_create(c->sheet, required_size, result); + if (error != CSS_OK) + return error; + + /* Copy the bytecode to it */ + memcpy((*result)->bytecode, &opv, sizeof(opv)); + if ((flags & FLAG_INHERIT) == false && value == Z_INDEX_SET) { + memcpy(((uint8_t *) (*result)->bytecode) + sizeof(opv), + &num, sizeof(num)); + } + + return CSS_OK; +} + |