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| Rev | Author | Line No. | Line |
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| 3584 | sourcerer | 1 | /* |
| 2 | * Licensed under the MIT License, |
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| 3 | * http://www.opensource.org/licenses/mit-license.php |
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| 4 | * Copyright 2010 The NetSurf Browser Project. |
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| 5 | */ |
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| 6 | |||
| 7 | #include |
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| 8 | #include |
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| 9 | |||
| 10 | #include "bytecode/bytecode.h" |
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| 11 | #include "bytecode/opcodes.h" |
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| 12 | #include "parse/properties/properties.h" |
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| 13 | #include "parse/properties/utils.h" |
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| 14 | |||
| 15 | /** |
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| 16 | * Parse opacity |
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| 17 | * |
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| 18 | * \param c Parsing context |
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| 19 | * \param vector Vector of tokens to process |
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| 20 | * \param ctx Pointer to vector iteration context |
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| 21 | * \param result resulting style |
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| 22 | * \return CSS_OK on success, |
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| 23 | * CSS_NOMEM on memory exhaustion, |
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| 24 | * CSS_INVALID if the input is not valid |
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| 25 | * |
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| 26 | * Post condition: \a *ctx is updated with the next token to process |
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| 27 | * If the input is invalid, then \a *ctx remains unchanged. |
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| 28 | */ |
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| 29 | css_error css__parse_opacity(css_language *c, |
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| 30 | const parserutils_vector *vector, int *ctx, |
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| 31 | css_style *result) |
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| 32 | { |
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| 33 | int orig_ctx = *ctx; |
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| 34 | css_error error; |
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| 35 | const css_token *token; |
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| 36 | bool match; |
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| 37 | |||
| 38 | token = parserutils_vector_iterate(vector, ctx); |
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| 39 | if ((token == NULL) || ((token->type != CSS_TOKEN_IDENT) && (token->type != CSS_TOKEN_NUMBER))) { |
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| 40 | *ctx = orig_ctx; |
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| 41 | return CSS_INVALID; |
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| 42 | } |
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| 43 | |||
| 44 | if ((token->type == CSS_TOKEN_IDENT) && (lwc_string_caseless_isequal(token->idata, c->strings[INHERIT], &match) == lwc_error_ok && match)) { |
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| 45 | error = css_stylesheet_style_inherit(result, CSS_PROP_OPACITY); |
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| 46 | } else if (token->type == CSS_TOKEN_NUMBER) { |
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| 47 | css_fixed num = 0; |
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| 48 | size_t consumed = 0; |
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| 49 | |||
| 50 | num = css__number_from_lwc_string(token->idata, false, &consumed); |
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| 51 | /* Invalid if there are trailing characters */ |
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| 52 | if (consumed != lwc_string_length(token->idata)) { |
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| 53 | *ctx = orig_ctx; |
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| 54 | return CSS_INVALID; |
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| 55 | } |
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| 56 | |||
| 57 | /* Clamp to range [0,1] */ |
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| 58 | if (num < 0) |
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| 59 | num = 0; |
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| 60 | if (num > INTTOFIX(1)) |
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| 61 | num = INTTOFIX(1); |
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| 62 | |||
| 63 | error = css__stylesheet_style_appendOPV(result, CSS_PROP_OPACITY, 0, OPACITY_SET); |
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| 64 | if (error != CSS_OK) { |
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| 65 | *ctx = orig_ctx; |
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| 66 | return error; |
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| 67 | } |
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| 68 | |||
| 69 | error = css__stylesheet_style_append(result, num); |
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| 70 | } else { |
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| 71 | error = CSS_INVALID; |
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| 72 | } |
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| 73 | |||
| 74 | if (error != CSS_OK) |
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| 75 | *ctx = orig_ctx; |
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| 76 | |||
| 77 | return error; |
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| 78 | } |
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| 79 |