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author | Michael Orlitzky <michael@orlitzky.com> | 2023-09-18 15:04:24 -0400 |
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committer | John-Mark Bell <jmb@netsurf-browser.org> | 2023-10-01 10:47:44 +0100 |
commit | 76ccb5b60d67b5ff96d48bfe12aa04787c5b1f99 (patch) | |
tree | ae7fad2975d23e4c0c307117bd2fb0617e244802 /src/parse/properties | |
parent | d6e9f636d693fb129b373862d69ae85c861049f0 (diff) | |
download | libcss-76ccb5b60d67b5ff96d48bfe12aa04787c5b1f99.tar.gz libcss-76ccb5b60d67b5ff96d48bfe12aa04787c5b1f99.tar.bz2 |
Add support for SVG stroke-opacity property
https://www.w3.org/TR/SVGTiny12/painting.html#StrokeOpacityProperty
This property is unique to SVG documents, but is otherwise analogous
to the usual CSS "opacity" property (and the recently-added SVG
fill-opacity property).
Diffstat (limited to 'src/parse/properties')
-rw-r--r-- | src/parse/properties/Makefile | 1 | ||||
-rw-r--r-- | src/parse/properties/properties.c | 2 | ||||
-rw-r--r-- | src/parse/properties/properties.h | 4 | ||||
-rw-r--r-- | src/parse/properties/stroke_opacity.c | 82 |
4 files changed, 89 insertions, 0 deletions
diff --git a/src/parse/properties/Makefile b/src/parse/properties/Makefile index fc7ac76..df84d49 100644 --- a/src/parse/properties/Makefile +++ b/src/parse/properties/Makefile @@ -62,6 +62,7 @@ DIR_SOURCES := \ play_during.c \ properties.c \ quotes.c \ + stroke_opacity.c \ text_decoration.c \ utils.c \ voice_family.c diff --git a/src/parse/properties/properties.c b/src/parse/properties/properties.c index c1187ca..2cc849c 100644 --- a/src/parse/properties/properties.c +++ b/src/parse/properties/properties.c @@ -141,6 +141,7 @@ const css_prop_handler property_handlers[LAST_PROP + 1 - FIRST_PROP] = css__parse_speak, css__parse_speech_rate, css__parse_stress, + css__parse_stroke_opacity, css__parse_table_layout, css__parse_text_align, css__parse_text_decoration, @@ -263,6 +264,7 @@ const uint32_t property_unit_mask[CSS_N_PROPERTIES] = { [CSS_PROP_Z_INDEX] = UNIT_MASK_Z_INDEX, [CSS_PROP_OPACITY] = UNIT_MASK_OPACITY, [CSS_PROP_FILL_OPACITY] = UNIT_MASK_FILL_OPACITY, + [CSS_PROP_STROKE_OPACITY] = UNIT_MASK_STROKE_OPACITY, [CSS_PROP_BREAK_AFTER] = UNIT_MASK_BREAK_AFTER, [CSS_PROP_BREAK_BEFORE] = UNIT_MASK_BREAK_BEFORE, [CSS_PROP_BREAK_INSIDE] = UNIT_MASK_BREAK_INSIDE, diff --git a/src/parse/properties/properties.h b/src/parse/properties/properties.h index 25ef60e..17b7f41 100644 --- a/src/parse/properties/properties.h +++ b/src/parse/properties/properties.h @@ -409,6 +409,9 @@ css_error css__parse_speech_rate(css_language *c, css_error css__parse_stress(css_language *c, const parserutils_vector *vector, int32_t *ctx, css_style *result); +css_error css__parse_stroke_opacity(css_language *c, + const parserutils_vector *vector, int32_t *ctx, + css_style *result); css_error css__parse_table_layout(css_language *c, const parserutils_vector *vector, int32_t *ctx, css_style *result); @@ -550,6 +553,7 @@ extern const uint32_t property_unit_mask[CSS_N_PROPERTIES]; #define UNIT_MASK_Z_INDEX (0) #define UNIT_MASK_OPACITY (0) #define UNIT_MASK_FILL_OPACITY (0) +#define UNIT_MASK_STROKE_OPACITY (0) #define UNIT_MASK_BREAK_AFTER (0) #define UNIT_MASK_BREAK_BEFORE (0) #define UNIT_MASK_BREAK_INSIDE (0) diff --git a/src/parse/properties/stroke_opacity.c b/src/parse/properties/stroke_opacity.c new file mode 100644 index 0000000..7c10998 --- /dev/null +++ b/src/parse/properties/stroke_opacity.c @@ -0,0 +1,82 @@ +/* + * Licensed under the MIT License, + * http://www.opensource.org/licenses/mit-license.php + */ + +#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 stroke-opacity + * + * \param c Parsing context + * \param vector Vector of tokens to process + * \param ctx Pointer to vector iteration context + * \param result 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_stroke_opacity(css_language *c, + const parserutils_vector *vector, int32_t *ctx, + css_style *result) +{ + int32_t orig_ctx = *ctx; + css_error error; + const css_token *token; + enum flag_value flag_value; + + token = parserutils_vector_iterate(vector, ctx); + if ((token == NULL) || ((token->type != CSS_TOKEN_IDENT) && (token->type != CSS_TOKEN_NUMBER))) { + *ctx = orig_ctx; + return CSS_INVALID; + } + + flag_value = get_css_flag_value(c, token); + + if (flag_value != FLAG_VALUE__NONE) { + error = css_stylesheet_style_flag_value(result, flag_value, + CSS_PROP_STROKE_OPACITY); + + } else if (token->type == CSS_TOKEN_NUMBER) { + css_fixed num = 0; + size_t consumed = 0; + + num = css__number_from_lwc_string(token->idata, false, &consumed); + /* Invalid if there are trailing characters */ + if (consumed != lwc_string_length(token->idata)) { + *ctx = orig_ctx; + return CSS_INVALID; + } + + /* Clamp to range [0,1] */ + if (num < 0) + num = 0; + if (num > INTTOFIX(1)) + num = INTTOFIX(1); + + error = css__stylesheet_style_appendOPV(result, CSS_PROP_STROKE_OPACITY, 0, STROKE_OPACITY_SET); + if (error != CSS_OK) { + *ctx = orig_ctx; + return error; + } + + error = css__stylesheet_style_append(result, num); + } else { + error = CSS_INVALID; + } + + if (error != CSS_OK) + *ctx = orig_ctx; + + return error; +} + |