From d6e9f636d693fb129b373862d69ae85c861049f0 Mon Sep 17 00:00:00 2001 From: Michael Orlitzky Date: Mon, 18 Sep 2023 10:36:48 -0400 Subject: Add support for SVG fill-opacity property https://www.w3.org/TR/SVGTiny12/painting.html#FillOpacityProperty This property is unique to SVG documents, but is otherwise analogous to the usual CSS "opacity" property. --- src/parse/properties/Makefile | 1 + src/parse/properties/fill_opacity.c | 82 +++++++++++++++++++++++++++++++++++++ src/parse/properties/properties.c | 2 + src/parse/properties/properties.h | 4 ++ 4 files changed, 89 insertions(+) create mode 100644 src/parse/properties/fill_opacity.c (limited to 'src/parse/properties') diff --git a/src/parse/properties/Makefile b/src/parse/properties/Makefile index 6461dda..fc7ac76 100644 --- a/src/parse/properties/Makefile +++ b/src/parse/properties/Makefile @@ -45,6 +45,7 @@ DIR_SOURCES := \ cue.c \ cursor.c \ elevation.c \ + fill_opacity.c \ flex.c \ flex_flow.c \ font.c \ diff --git a/src/parse/properties/fill_opacity.c b/src/parse/properties/fill_opacity.c new file mode 100644 index 0000000..caed86f --- /dev/null +++ b/src/parse/properties/fill_opacity.c @@ -0,0 +1,82 @@ +/* + * Licensed under the MIT License, + * http://www.opensource.org/licenses/mit-license.php + */ + +#include +#include + +#include "bytecode/bytecode.h" +#include "bytecode/opcodes.h" +#include "parse/properties/properties.h" +#include "parse/properties/utils.h" + +/** + * Parse fill-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_fill_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_FILL_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_FILL_OPACITY, 0, FILL_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; +} + diff --git a/src/parse/properties/properties.c b/src/parse/properties/properties.c index 06524da..c1187ca 100644 --- a/src/parse/properties/properties.c +++ b/src/parse/properties/properties.c @@ -74,6 +74,7 @@ const css_prop_handler property_handlers[LAST_PROP + 1 - FIRST_PROP] = css__parse_display, css__parse_elevation, css__parse_empty_cells, + css__parse_fill_opacity, css__parse_flex, css__parse_flex_basis, css__parse_flex_direction, @@ -261,6 +262,7 @@ const uint32_t property_unit_mask[CSS_N_PROPERTIES] = { [CSS_PROP_WORD_SPACING] = UNIT_MASK_WORD_SPACING, [CSS_PROP_Z_INDEX] = UNIT_MASK_Z_INDEX, [CSS_PROP_OPACITY] = UNIT_MASK_OPACITY, + [CSS_PROP_FILL_OPACITY] = UNIT_MASK_FILL_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 83aa32b..25ef60e 100644 --- a/src/parse/properties/properties.h +++ b/src/parse/properties/properties.h @@ -208,6 +208,9 @@ css_error css__parse_elevation(css_language *c, css_error css__parse_empty_cells(css_language *c, const parserutils_vector *vector, int32_t *ctx, css_style *result); +css_error css__parse_fill_opacity(css_language *c, + const parserutils_vector *vector, int32_t *ctx, + css_style *result); css_error css__parse_flex(css_language *c, const parserutils_vector *vector, int32_t *ctx, css_style *result); @@ -546,6 +549,7 @@ extern const uint32_t property_unit_mask[CSS_N_PROPERTIES]; #define UNIT_MASK_WORD_SPACING (UNIT_LENGTH) #define UNIT_MASK_Z_INDEX (0) #define UNIT_MASK_OPACITY (0) +#define UNIT_MASK_FILL_OPACITY (0) #define UNIT_MASK_BREAK_AFTER (0) #define UNIT_MASK_BREAK_BEFORE (0) #define UNIT_MASK_BREAK_INSIDE (0) -- cgit v1.2.3