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| Rev | Author | Line No. | Line |
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| 3584 | sourcerer | 1 | /* |
| 2 | * This file is part of LibCSS. |
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| 3 | * Licensed under the MIT License, |
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| 4 | * http://www.opensource.org/licenses/mit-license.php |
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| 5 | * Copyright 2009 John-Mark Bell |
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| 6 | */ |
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| 7 | |||
| 8 | #include |
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| 9 | #include |
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| 10 | |||
| 11 | #include "bytecode/bytecode.h" |
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| 12 | #include "bytecode/opcodes.h" |
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| 13 | #include "parse/properties/properties.h" |
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| 14 | #include "parse/properties/utils.h" |
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| 15 | |||
| 16 | |||
| 17 | /** |
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| 18 | * Parse content |
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| 19 | * |
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| 20 | * \param c Parsing context |
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| 21 | * \param vector Vector of tokens to process |
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| 22 | * \param ctx Pointer to vector iteration context |
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| 23 | * \param result Pointer to location to receive resulting style |
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| 24 | * \return CSS_OK on success, |
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| 25 | * CSS_NOMEM on memory exhaustion, |
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| 26 | * CSS_INVALID if the input is not valid |
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| 27 | * |
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| 28 | * Post condition: \a *ctx is updated with the next token to process |
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| 29 | * If the input is invalid, then \a *ctx remains unchanged. |
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| 30 | */ |
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| 31 | css_error css__parse_content(css_language *c, |
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| 32 | const parserutils_vector *vector, int *ctx, |
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| 33 | css_style *result) |
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| 34 | { |
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| 35 | int orig_ctx = *ctx; |
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| 36 | css_error error; |
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| 37 | const css_token *token; |
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| 38 | bool match; |
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| 39 | |||
| 40 | /* IDENT(normal, none, inherit) | [ ... ]+ */ |
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| 41 | token = parserutils_vector_iterate(vector, ctx); |
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| 42 | if (token == NULL) { |
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| 43 | *ctx = orig_ctx; |
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| 44 | return CSS_INVALID; |
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| 45 | } |
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| 46 | |||
| 47 | |||
| 48 | if ((token->type == CSS_TOKEN_IDENT) && |
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| 49 | (lwc_string_caseless_isequal(token->idata, |
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| 50 | c->strings[INHERIT], |
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| 51 | &match) == lwc_error_ok && match)) { |
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| 52 | error = css_stylesheet_style_inherit(result, CSS_PROP_CONTENT); |
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| 53 | } else if ((token->type == CSS_TOKEN_IDENT) && |
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| 54 | (lwc_string_caseless_isequal(token->idata, |
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| 55 | c->strings[NORMAL], |
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| 56 | &match) == lwc_error_ok && match)) { |
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| 57 | error = css__stylesheet_style_appendOPV(result, CSS_PROP_CONTENT, 0, CONTENT_NORMAL); |
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| 58 | } else if ((token->type == CSS_TOKEN_IDENT) && |
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| 59 | (lwc_string_caseless_isequal(token->idata, |
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| 60 | c->strings[NONE], |
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| 61 | &match) == lwc_error_ok && match)) { |
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| 62 | error = css__stylesheet_style_appendOPV(result, CSS_PROP_CONTENT, 0, CONTENT_NONE); |
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| 63 | } else { |
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| 64 | |||
| 65 | /* Macro to output the value marker, awkward because we need to check |
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| 66 | * first to determine how the value is constructed. |
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| 67 | */ |
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| 68 | #define CSS_APPEND(CSSVAL) css__stylesheet_style_append(result, first?buildOPV(CSS_PROP_CONTENT, 0, CSSVAL):CSSVAL) |
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| 69 | |||
| 70 | bool first = true; |
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| 71 | int prev_ctx = orig_ctx; |
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| 72 | |||
| 73 | /* [ |
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| 74 | * IDENT(open-quote, close-quote, no-open-quote, |
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| 75 | * no-close-quote) | |
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| 76 | * STRING | |
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| 77 | * URI | |
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| 78 | * FUNCTION(attr) IDENT ')' | |
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| 79 | * FUNCTION(counter) IDENT IDENT? ')' | |
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| 80 | * FUNCTION(counters) IDENT STRING IDENT? ')' |
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| 81 | * ]+ |
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| 82 | */ |
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| 83 | |||
| 84 | while (token != NULL) { |
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| 85 | if ((token->type == CSS_TOKEN_IDENT) && |
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| 86 | (lwc_string_caseless_isequal( |
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| 87 | token->idata, c->strings[OPEN_QUOTE], |
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| 88 | &match) == lwc_error_ok && match)) { |
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| 89 | |||
| 90 | error = CSS_APPEND(CONTENT_OPEN_QUOTE); |
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| 91 | |||
| 92 | } else if (token->type == CSS_TOKEN_IDENT && |
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| 93 | (lwc_string_caseless_isequal( |
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| 94 | token->idata, c->strings[CLOSE_QUOTE], |
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| 95 | &match) == lwc_error_ok && match)) { |
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| 96 | |||
| 97 | error = CSS_APPEND(CONTENT_CLOSE_QUOTE); |
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| 98 | } else if (token->type == CSS_TOKEN_IDENT && |
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| 99 | (lwc_string_caseless_isequal( |
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| 100 | token->idata, c->strings[NO_OPEN_QUOTE], |
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| 101 | &match) == lwc_error_ok && match)) { |
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| 102 | error = CSS_APPEND(CONTENT_NO_OPEN_QUOTE); |
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| 103 | } else if (token->type == CSS_TOKEN_IDENT && |
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| 104 | (lwc_string_caseless_isequal( |
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| 105 | token->idata, c->strings[NO_CLOSE_QUOTE], |
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| 106 | &match) == lwc_error_ok && match)) { |
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| 107 | error = CSS_APPEND(CONTENT_NO_CLOSE_QUOTE); |
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| 108 | } else if (token->type == CSS_TOKEN_STRING) { |
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| 109 | uint32_t snumber; |
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| 110 | |||
| 111 | error = css__stylesheet_string_add(c->sheet, lwc_string_ref(token->idata), &snumber); |
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| 112 | if (error != CSS_OK) { |
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| 113 | *ctx = orig_ctx; |
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| 114 | return error; |
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| 115 | } |
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| 116 | |||
| 117 | error = CSS_APPEND(CONTENT_STRING); |
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| 118 | if (error != CSS_OK) { |
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| 119 | *ctx = orig_ctx; |
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| 120 | return error; |
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| 121 | } |
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| 122 | |||
| 123 | error = css__stylesheet_style_append(result, snumber); |
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| 124 | } else if (token->type == CSS_TOKEN_URI) { |
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| 125 | lwc_string *uri; |
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| 126 | uint32_t uri_snumber; |
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| 127 | |||
| 128 | error = c->sheet->resolve(c->sheet->resolve_pw, |
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| 129 | c->sheet->url, |
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| 130 | token->idata, |
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| 131 | &uri); |
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| 132 | if (error != CSS_OK) { |
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| 133 | *ctx = orig_ctx; |
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| 134 | return error; |
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| 135 | } |
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| 136 | |||
| 137 | error = css__stylesheet_string_add(c->sheet, |
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| 138 | uri, |
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| 139 | &uri_snumber); |
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| 140 | if (error != CSS_OK) { |
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| 141 | *ctx = orig_ctx; |
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| 142 | return error; |
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| 143 | } |
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| 144 | |||
| 145 | error = CSS_APPEND(CONTENT_URI); |
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| 146 | if (error != CSS_OK) { |
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| 147 | *ctx = orig_ctx; |
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| 148 | return error; |
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| 149 | } |
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| 150 | |||
| 151 | error = css__stylesheet_style_append(result, uri_snumber); |
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| 152 | } else if (token->type == CSS_TOKEN_FUNCTION && |
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| 153 | (lwc_string_caseless_isequal( |
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| 154 | token->idata, c->strings[ATTR], |
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| 155 | &match) == lwc_error_ok && match)) { |
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| 156 | uint32_t snumber; |
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| 157 | |||
| 158 | consumeWhitespace(vector, ctx); |
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| 159 | |||
| 160 | /* Expect IDENT */ |
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| 161 | token = parserutils_vector_iterate(vector, ctx); |
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| 162 | if (token == NULL || token->type != CSS_TOKEN_IDENT) { |
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| 163 | *ctx = orig_ctx; |
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| 164 | return CSS_INVALID; |
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| 165 | } |
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| 166 | |||
| 167 | error = css__stylesheet_string_add(c->sheet, lwc_string_ref(token->idata), &snumber); |
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| 168 | if (error != CSS_OK) { |
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| 169 | *ctx = orig_ctx; |
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| 170 | return error; |
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| 171 | } |
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| 172 | |||
| 173 | error = CSS_APPEND(CONTENT_ATTR); |
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| 174 | if (error != CSS_OK) { |
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| 175 | *ctx = orig_ctx; |
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| 176 | return error; |
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| 177 | } |
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| 178 | |||
| 179 | error = css__stylesheet_style_append(result, snumber); |
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| 180 | |||
| 181 | consumeWhitespace(vector, ctx); |
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| 182 | |||
| 183 | /* Expect ')' */ |
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| 184 | token = parserutils_vector_iterate(vector, ctx); |
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| 185 | if (token == NULL || tokenIsChar(token, ')') == false) { |
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| 186 | *ctx = orig_ctx; |
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| 187 | return CSS_INVALID; |
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| 188 | } |
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| 189 | } else if (token->type == CSS_TOKEN_FUNCTION && |
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| 190 | (lwc_string_caseless_isequal( |
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| 191 | token->idata, c->strings[COUNTER], |
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| 192 | &match) == lwc_error_ok && match)) { |
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| 193 | lwc_string *name; |
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| 194 | uint32_t snumber; |
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| 195 | uint32_t opv; |
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| 196 | |||
| 197 | opv = CONTENT_COUNTER; |
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| 198 | |||
| 199 | consumeWhitespace(vector, ctx); |
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| 200 | |||
| 201 | /* Expect IDENT */ |
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| 202 | token = parserutils_vector_iterate(vector, ctx); |
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| 203 | if (token == NULL || token->type != CSS_TOKEN_IDENT) { |
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| 204 | *ctx = orig_ctx; |
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| 205 | return CSS_INVALID; |
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| 206 | } |
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| 207 | |||
| 208 | name = token->idata; |
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| 209 | |||
| 210 | consumeWhitespace(vector, ctx); |
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| 211 | |||
| 212 | /* Possible ',' */ |
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| 213 | token = parserutils_vector_peek(vector, *ctx); |
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| 214 | if (token == NULL || |
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| 215 | (tokenIsChar(token, ',') == false && |
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| 216 | tokenIsChar(token, ')') == false)) { |
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| 217 | *ctx = orig_ctx; |
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| 218 | return CSS_INVALID; |
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| 219 | } |
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| 220 | |||
| 221 | if (tokenIsChar(token, ',')) { |
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| 222 | uint16_t v; |
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| 223 | |||
| 224 | parserutils_vector_iterate(vector, ctx); |
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| 225 | |||
| 226 | consumeWhitespace(vector, ctx); |
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| 227 | |||
| 228 | /* Expect IDENT */ |
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| 229 | token = parserutils_vector_peek(vector, *ctx); |
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| 230 | if (token == NULL || token->type != |
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| 231 | CSS_TOKEN_IDENT) { |
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| 232 | *ctx = orig_ctx; |
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| 233 | return CSS_INVALID; |
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| 234 | } |
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| 235 | |||
| 236 | error = css__parse_list_style_type_value(c, token, &v); |
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| 237 | if (error != CSS_OK) { |
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| 238 | *ctx = orig_ctx; |
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| 239 | return error; |
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| 240 | } |
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| 241 | |||
| 242 | opv |= v << CONTENT_COUNTER_STYLE_SHIFT; |
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| 243 | |||
| 244 | parserutils_vector_iterate(vector, ctx); |
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| 245 | |||
| 246 | consumeWhitespace(vector, ctx); |
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| 247 | } else { |
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| 248 | opv |= LIST_STYLE_TYPE_DECIMAL << |
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| 249 | CONTENT_COUNTER_STYLE_SHIFT; |
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| 250 | } |
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| 251 | |||
| 252 | /* Expect ')' */ |
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| 253 | token = parserutils_vector_iterate(vector, ctx); |
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| 254 | if (token == NULL || tokenIsChar(token, ')') == false) { |
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| 255 | *ctx = orig_ctx; |
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| 256 | return CSS_INVALID; |
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| 257 | } |
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| 258 | |||
| 259 | |||
| 260 | error = css__stylesheet_string_add(c->sheet, lwc_string_ref(name), &snumber); |
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| 261 | if (error != CSS_OK) { |
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| 262 | *ctx = orig_ctx; |
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| 263 | return error; |
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| 264 | } |
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| 265 | |||
| 266 | error = CSS_APPEND(opv); |
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| 267 | if (error != CSS_OK) { |
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| 268 | *ctx = orig_ctx; |
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| 269 | return error; |
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| 270 | } |
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| 271 | |||
| 272 | error = css__stylesheet_style_append(result, snumber); |
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| 273 | } else if (token->type == CSS_TOKEN_FUNCTION && |
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| 274 | (lwc_string_caseless_isequal( |
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| 275 | token->idata, c->strings[COUNTERS], |
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| 276 | &match) == lwc_error_ok && match)) { |
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| 277 | lwc_string *name; |
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| 278 | lwc_string *sep; |
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| 279 | uint32_t name_snumber; |
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| 280 | uint32_t sep_snumber; |
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| 281 | uint32_t opv; |
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| 282 | |||
| 283 | opv = CONTENT_COUNTERS; |
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| 284 | |||
| 285 | consumeWhitespace(vector, ctx); |
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| 286 | |||
| 287 | /* Expect IDENT */ |
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| 288 | token = parserutils_vector_iterate(vector, ctx); |
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| 289 | if (token == NULL || token->type != CSS_TOKEN_IDENT) { |
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| 290 | *ctx = orig_ctx; |
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| 291 | return CSS_INVALID; |
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| 292 | } |
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| 293 | |||
| 294 | name = token->idata; |
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| 295 | |||
| 296 | consumeWhitespace(vector, ctx); |
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| 297 | |||
| 298 | /* Expect ',' */ |
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| 299 | token = parserutils_vector_iterate(vector, ctx); |
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| 300 | if (token == NULL || tokenIsChar(token, ',') == false) { |
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| 301 | *ctx = orig_ctx; |
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| 302 | return CSS_INVALID; |
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| 303 | } |
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| 304 | |||
| 305 | consumeWhitespace(vector, ctx); |
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| 306 | |||
| 307 | /* Expect STRING */ |
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| 308 | token = parserutils_vector_iterate(vector, ctx); |
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| 309 | if (token == NULL || token->type != CSS_TOKEN_STRING) { |
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| 310 | *ctx = orig_ctx; |
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| 311 | return CSS_INVALID; |
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| 312 | } |
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| 313 | |||
| 314 | sep = token->idata; |
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| 315 | |||
| 316 | consumeWhitespace(vector, ctx); |
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| 317 | |||
| 318 | /* Possible ',' */ |
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| 319 | token = parserutils_vector_peek(vector, *ctx); |
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| 320 | if (token == NULL || |
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| 321 | (tokenIsChar(token, ',') == false && |
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| 322 | tokenIsChar(token, ')') == false)) { |
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| 323 | *ctx = orig_ctx; |
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| 324 | return CSS_INVALID; |
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| 325 | } |
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| 326 | |||
| 327 | if (tokenIsChar(token, ',')) { |
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| 328 | uint16_t v; |
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| 329 | |||
| 330 | parserutils_vector_iterate(vector, ctx); |
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| 331 | |||
| 332 | consumeWhitespace(vector, ctx); |
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| 333 | |||
| 334 | /* Expect IDENT */ |
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| 335 | token = parserutils_vector_peek(vector, *ctx); |
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| 336 | if (token == NULL || token->type != |
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| 337 | CSS_TOKEN_IDENT) { |
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| 338 | *ctx = orig_ctx; |
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| 339 | return CSS_INVALID; |
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| 340 | } |
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| 341 | |||
| 342 | error = css__parse_list_style_type_value(c, |
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| 343 | token, &v); |
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| 344 | if (error != CSS_OK) { |
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| 345 | *ctx = orig_ctx; |
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| 346 | return error; |
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| 347 | } |
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| 348 | |||
| 349 | opv |= v << CONTENT_COUNTERS_STYLE_SHIFT; |
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| 350 | |||
| 351 | parserutils_vector_iterate(vector, ctx); |
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| 352 | |||
| 353 | consumeWhitespace(vector, ctx); |
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| 354 | } else { |
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| 355 | opv |= LIST_STYLE_TYPE_DECIMAL << |
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| 356 | CONTENT_COUNTERS_STYLE_SHIFT; |
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| 357 | } |
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| 358 | |||
| 359 | /* Expect ')' */ |
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| 360 | token = parserutils_vector_iterate(vector, ctx); |
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| 361 | if (token == NULL || tokenIsChar(token, ')') == false) { |
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| 362 | *ctx = orig_ctx; |
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| 363 | return CSS_INVALID; |
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| 364 | } |
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| 365 | |||
| 366 | |||
| 367 | error = css__stylesheet_string_add(c->sheet, lwc_string_ref(name), &name_snumber); |
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| 368 | if (error != CSS_OK) { |
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| 369 | *ctx = orig_ctx; |
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| 370 | return error; |
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| 371 | } |
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| 372 | |||
| 373 | error = css__stylesheet_string_add(c->sheet, lwc_string_ref(sep), &sep_snumber); |
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| 374 | if (error != CSS_OK) { |
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| 375 | *ctx = orig_ctx; |
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| 376 | return error; |
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| 377 | } |
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| 378 | |||
| 379 | error = CSS_APPEND(opv); |
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| 380 | if (error != CSS_OK) { |
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| 381 | *ctx = orig_ctx; |
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| 382 | return error; |
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| 383 | } |
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| 384 | |||
| 385 | error = css__stylesheet_style_append(result, name_snumber); |
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| 386 | if (error != CSS_OK) { |
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| 387 | *ctx = orig_ctx; |
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| 388 | return error; |
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| 389 | } |
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| 390 | |||
| 391 | error = css__stylesheet_style_append(result, sep_snumber); |
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| 392 | } else if (first) { |
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| 393 | /* Invalid if this is the first iteration */ |
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| 394 | error = CSS_INVALID; |
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| 395 | } else { |
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| 396 | /* Give up, ensuring current token is reprocessed */ |
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| 397 | *ctx = prev_ctx; |
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| 398 | error = CSS_OK; |
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| 399 | break; |
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| 400 | } |
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| 401 | |||
| 402 | /* if there was an error bail */ |
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| 403 | if (error != CSS_OK) { |
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| 404 | *ctx = orig_ctx; |
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| 405 | return error; |
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| 406 | } |
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| 407 | |||
| 408 | first = false; |
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| 409 | |||
| 410 | consumeWhitespace(vector, ctx); |
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| 411 | |||
| 412 | prev_ctx = *ctx; |
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| 413 | token = parserutils_vector_iterate(vector, ctx); |
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| 414 | } /* while */ |
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| 415 | |||
| 416 | /* Write list terminator */ |
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| 417 | css__stylesheet_style_append(result, CONTENT_NORMAL); |
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| 418 | } |
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| 419 | |||
| 420 | if (error != CSS_OK) |
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| 421 | *ctx = orig_ctx; |
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| 422 | |||
| 423 | return error; |
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| 424 | } |
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| 425 |