1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/*
* 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 content
*
* \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_content(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 = sizeof(opv);
int temp_ctx = *ctx;
uint8_t *ptr;
bool match;
/* IDENT(normal, none, inherit) |
* [
* IDENT(open-quote, close-quote, no-open-quote, no-close-quote) |
* STRING | URI |
* FUNCTION(attr) IDENT ')' |
* FUNCTION(counter) IDENT IDENT? ')' |
* FUNCTION(counters) IDENT STRING IDENT? ')'
* ]+
*/
/* Pass 1: Calculate required size & validate input */
token = parserutils_vector_peek(vector, temp_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)) {
flags = FLAG_INHERIT;
parserutils_vector_iterate(vector, &temp_ctx);
} else if (token->type == CSS_TOKEN_IDENT &&
(lwc_string_caseless_isequal(
token->idata, c->strings[NORMAL],
&match) == lwc_error_ok && match)) {
value = CONTENT_NORMAL;
parserutils_vector_iterate(vector, &temp_ctx);
} else if (token->type == CSS_TOKEN_IDENT &&
(lwc_string_caseless_isequal(
token->idata, c->strings[NONE],
&match) == lwc_error_ok && match)) {
value = CONTENT_NONE;
parserutils_vector_iterate(vector, &temp_ctx);
} else {
uint32_t len;
error = parse_content_list(c, vector, &temp_ctx, &value,
NULL, &len);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
required_size += len;
}
opv = buildOPV(CSS_PROP_CONTENT, flags, value);
/* Allocate result */
error = css_stylesheet_style_create(c->sheet, required_size, result);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
/* Copy OPV to bytecode */
ptr = (*result)->bytecode;
memcpy(ptr, &opv, sizeof(opv));
ptr += sizeof(opv);
/* Pass 2: construct bytecode */
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) ||
(lwc_string_caseless_isequal(
token->idata, c->strings[NORMAL],
&match) == lwc_error_ok && match) ||
(lwc_string_caseless_isequal(
token->idata, c->strings[NONE],
&match) == lwc_error_ok && match))) {
parserutils_vector_iterate(vector, ctx);
} else {
error = parse_content_list(c, vector, ctx, NULL, ptr, NULL);
if (error != CSS_OK) {
*ctx = orig_ctx;
return error;
}
}
return CSS_OK;
}
|
