| 0,0 → 1,425 |
|---|
| /* |
| * 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 css__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; |
| bool match; |
| |
| /* IDENT(normal, none, inherit) | [ ... ]+ */ |
| token = parserutils_vector_iterate(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)) { |
| error = css_stylesheet_style_inherit(result, CSS_PROP_CONTENT); |
| } else if ((token->type == CSS_TOKEN_IDENT) && |
| (lwc_string_caseless_isequal(token->idata, |
| c->strings[NORMAL], |
| &match) == lwc_error_ok && match)) { |
| error = css__stylesheet_style_appendOPV(result, CSS_PROP_CONTENT, 0, CONTENT_NORMAL); |
| } else if ((token->type == CSS_TOKEN_IDENT) && |
| (lwc_string_caseless_isequal(token->idata, |
| c->strings[NONE], |
| &match) == lwc_error_ok && match)) { |
| error = css__stylesheet_style_appendOPV(result, CSS_PROP_CONTENT, 0, CONTENT_NONE); |
| } else { |
| |
| /* Macro to output the value marker, awkward because we need to check |
| * first to determine how the value is constructed. |
| */ |
| #define CSS_APPEND(CSSVAL) css__stylesheet_style_append(result, first?buildOPV(CSS_PROP_CONTENT, 0, CSSVAL):CSSVAL) |
| |
| bool first = true; |
| int prev_ctx = orig_ctx; |
| |
| /* [ |
| * 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? ')' |
| * ]+ |
| */ |
| |
| while (token != NULL) { |
| if ((token->type == CSS_TOKEN_IDENT) && |
| (lwc_string_caseless_isequal( |
| token->idata, c->strings[OPEN_QUOTE], |
| &match) == lwc_error_ok && match)) { |
| |
| error = CSS_APPEND(CONTENT_OPEN_QUOTE); |
| |
| } else if (token->type == CSS_TOKEN_IDENT && |
| (lwc_string_caseless_isequal( |
| token->idata, c->strings[CLOSE_QUOTE], |
| &match) == lwc_error_ok && match)) { |
| |
| error = CSS_APPEND(CONTENT_CLOSE_QUOTE); |
| } else if (token->type == CSS_TOKEN_IDENT && |
| (lwc_string_caseless_isequal( |
| token->idata, c->strings[NO_OPEN_QUOTE], |
| &match) == lwc_error_ok && match)) { |
| error = CSS_APPEND(CONTENT_NO_OPEN_QUOTE); |
| } else if (token->type == CSS_TOKEN_IDENT && |
| (lwc_string_caseless_isequal( |
| token->idata, c->strings[NO_CLOSE_QUOTE], |
| &match) == lwc_error_ok && match)) { |
| error = CSS_APPEND(CONTENT_NO_CLOSE_QUOTE); |
| } else if (token->type == CSS_TOKEN_STRING) { |
| uint32_t snumber; |
| |
| error = css__stylesheet_string_add(c->sheet, lwc_string_ref(token->idata), &snumber); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = CSS_APPEND(CONTENT_STRING); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = css__stylesheet_style_append(result, snumber); |
| } else if (token->type == CSS_TOKEN_URI) { |
| lwc_string *uri; |
| uint32_t uri_snumber; |
| |
| error = c->sheet->resolve(c->sheet->resolve_pw, |
| c->sheet->url, |
| token->idata, |
| &uri); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = css__stylesheet_string_add(c->sheet, |
| uri, |
| &uri_snumber); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = CSS_APPEND(CONTENT_URI); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = css__stylesheet_style_append(result, uri_snumber); |
| } else if (token->type == CSS_TOKEN_FUNCTION && |
| (lwc_string_caseless_isequal( |
| token->idata, c->strings[ATTR], |
| &match) == lwc_error_ok && match)) { |
| uint32_t snumber; |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Expect IDENT */ |
| token = parserutils_vector_iterate(vector, ctx); |
| if (token == NULL || token->type != CSS_TOKEN_IDENT) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| error = css__stylesheet_string_add(c->sheet, lwc_string_ref(token->idata), &snumber); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = CSS_APPEND(CONTENT_ATTR); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = css__stylesheet_style_append(result, snumber); |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Expect ')' */ |
| token = parserutils_vector_iterate(vector, ctx); |
| if (token == NULL || tokenIsChar(token, ')') == false) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| } else if (token->type == CSS_TOKEN_FUNCTION && |
| (lwc_string_caseless_isequal( |
| token->idata, c->strings[COUNTER], |
| &match) == lwc_error_ok && match)) { |
| lwc_string *name; |
| uint32_t snumber; |
| uint32_t opv; |
| |
| opv = CONTENT_COUNTER; |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Expect IDENT */ |
| token = parserutils_vector_iterate(vector, ctx); |
| if (token == NULL || token->type != CSS_TOKEN_IDENT) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| name = token->idata; |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Possible ',' */ |
| token = parserutils_vector_peek(vector, *ctx); |
| if (token == NULL || |
| (tokenIsChar(token, ',') == false && |
| tokenIsChar(token, ')') == false)) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| if (tokenIsChar(token, ',')) { |
| uint16_t v; |
| |
| parserutils_vector_iterate(vector, ctx); |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Expect IDENT */ |
| token = parserutils_vector_peek(vector, *ctx); |
| if (token == NULL || token->type != |
| CSS_TOKEN_IDENT) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| error = css__parse_list_style_type_value(c, token, &v); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| opv |= v << CONTENT_COUNTER_STYLE_SHIFT; |
| |
| parserutils_vector_iterate(vector, ctx); |
| |
| consumeWhitespace(vector, ctx); |
| } else { |
| opv |= LIST_STYLE_TYPE_DECIMAL << |
| CONTENT_COUNTER_STYLE_SHIFT; |
| } |
| |
| /* Expect ')' */ |
| token = parserutils_vector_iterate(vector, ctx); |
| if (token == NULL || tokenIsChar(token, ')') == false) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| |
| error = css__stylesheet_string_add(c->sheet, lwc_string_ref(name), &snumber); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = CSS_APPEND(opv); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = css__stylesheet_style_append(result, snumber); |
| } else if (token->type == CSS_TOKEN_FUNCTION && |
| (lwc_string_caseless_isequal( |
| token->idata, c->strings[COUNTERS], |
| &match) == lwc_error_ok && match)) { |
| lwc_string *name; |
| lwc_string *sep; |
| uint32_t name_snumber; |
| uint32_t sep_snumber; |
| uint32_t opv; |
| |
| opv = CONTENT_COUNTERS; |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Expect IDENT */ |
| token = parserutils_vector_iterate(vector, ctx); |
| if (token == NULL || token->type != CSS_TOKEN_IDENT) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| name = token->idata; |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Expect ',' */ |
| token = parserutils_vector_iterate(vector, ctx); |
| if (token == NULL || tokenIsChar(token, ',') == false) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Expect STRING */ |
| token = parserutils_vector_iterate(vector, ctx); |
| if (token == NULL || token->type != CSS_TOKEN_STRING) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| sep = token->idata; |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Possible ',' */ |
| token = parserutils_vector_peek(vector, *ctx); |
| if (token == NULL || |
| (tokenIsChar(token, ',') == false && |
| tokenIsChar(token, ')') == false)) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| if (tokenIsChar(token, ',')) { |
| uint16_t v; |
| |
| parserutils_vector_iterate(vector, ctx); |
| |
| consumeWhitespace(vector, ctx); |
| |
| /* Expect IDENT */ |
| token = parserutils_vector_peek(vector, *ctx); |
| if (token == NULL || token->type != |
| CSS_TOKEN_IDENT) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| error = css__parse_list_style_type_value(c, |
| token, &v); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| opv |= v << CONTENT_COUNTERS_STYLE_SHIFT; |
| |
| parserutils_vector_iterate(vector, ctx); |
| |
| consumeWhitespace(vector, ctx); |
| } else { |
| opv |= LIST_STYLE_TYPE_DECIMAL << |
| CONTENT_COUNTERS_STYLE_SHIFT; |
| } |
| |
| /* Expect ')' */ |
| token = parserutils_vector_iterate(vector, ctx); |
| if (token == NULL || tokenIsChar(token, ')') == false) { |
| *ctx = orig_ctx; |
| return CSS_INVALID; |
| } |
| |
| |
| error = css__stylesheet_string_add(c->sheet, lwc_string_ref(name), &name_snumber); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = css__stylesheet_string_add(c->sheet, lwc_string_ref(sep), &sep_snumber); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = CSS_APPEND(opv); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = css__stylesheet_style_append(result, name_snumber); |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| error = css__stylesheet_style_append(result, sep_snumber); |
| } else if (first) { |
| /* Invalid if this is the first iteration */ |
| error = CSS_INVALID; |
| } else { |
| /* Give up, ensuring current token is reprocessed */ |
| *ctx = prev_ctx; |
| error = CSS_OK; |
| break; |
| } |
| |
| /* if there was an error bail */ |
| if (error != CSS_OK) { |
| *ctx = orig_ctx; |
| return error; |
| } |
| |
| first = false; |
| |
| consumeWhitespace(vector, ctx); |
| |
| prev_ctx = *ctx; |
| token = parserutils_vector_iterate(vector, ctx); |
| } /* while */ |
| |
| /* Write list terminator */ |
| css__stylesheet_style_append(result, CONTENT_NORMAL); |
| } |
| |
| if (error != CSS_OK) |
| *ctx = orig_ctx; |
| |
| return error; |
| } |
| |