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-rw-r--r--src/parse/properties/font.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/src/parse/properties/font.c b/src/parse/properties/font.c
index e964cba..92726fb 100644
--- a/src/parse/properties/font.c
+++ b/src/parse/properties/font.c
@@ -5,6 +5,7 @@
* Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org>
*/
+#include <assert.h>
#include <string.h>
#include "bytecode/bytecode.h"
@@ -13,6 +14,259 @@
#include "parse/properties/utils.h"
/**
+ * Parse font
+ *
+ * \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 parse_font(css_language *c,
+ const parserutils_vector *vector, int *ctx,
+ css_style **result)
+{
+ int orig_ctx = *ctx;
+ int prev_ctx;
+ const css_token *token;
+ css_style *style = NULL;
+ css_style *variant = NULL;
+ css_style *weight = NULL;
+ css_style *size = NULL;
+ css_style *line_height = NULL;
+ css_style *family = NULL;
+ css_style *ret = NULL;
+ uint32_t required_size;
+ int svw;
+ css_error error;
+
+ /* Firstly, handle inherit */
+ token = parserutils_vector_peek(vector, *ctx);
+ if (token != NULL && token->type == CSS_TOKEN_IDENT &&
+ token->ilower == c->strings[INHERIT]) {
+ uint32_t *bytecode;
+
+ error = css_stylesheet_style_create(c->sheet,
+ 6 * sizeof(uint32_t), &ret);
+ if (error != CSS_OK) {
+ *ctx = orig_ctx;
+ return error;
+ }
+
+ bytecode = (uint32_t *) ret->bytecode;
+
+ *(bytecode++) = buildOPV(CSS_PROP_FONT_STYLE,
+ FLAG_INHERIT, 0);
+ *(bytecode++) = buildOPV(CSS_PROP_FONT_VARIANT,
+ FLAG_INHERIT, 0);
+ *(bytecode++) = buildOPV(CSS_PROP_FONT_WEIGHT,
+ FLAG_INHERIT, 0);
+ *(bytecode++) = buildOPV(CSS_PROP_FONT_SIZE,
+ FLAG_INHERIT, 0);
+ *(bytecode++) = buildOPV(CSS_PROP_LINE_HEIGHT,
+ FLAG_INHERIT, 0);
+ *(bytecode++) = buildOPV(CSS_PROP_FONT_FAMILY,
+ FLAG_INHERIT, 0);
+
+ parserutils_vector_iterate(vector, ctx);
+
+ *result = ret;
+
+ return CSS_OK;
+ } else if (token == NULL) {
+ /* No tokens -- clearly garbage */
+ *ctx = orig_ctx;
+ return CSS_INVALID;
+ }
+
+ /* Attempt to parse the optional style, variant, and weight */
+ for (svw = 0; svw < 3; svw++) {
+ prev_ctx = *ctx;
+ error = CSS_OK;
+
+ if (style == NULL &&
+ (error = parse_font_style(c, vector,
+ ctx, &style)) == CSS_OK) {
+ } else if (variant == NULL &&
+ (error = parse_font_variant(c, vector, ctx,
+ &variant)) == CSS_OK) {
+ } else if (weight == NULL &&
+ (error = parse_font_weight(c, vector, ctx,
+ &weight)) == CSS_OK) {
+ }
+
+ if (error == CSS_OK) {
+ consumeWhitespace(vector, ctx);
+
+ token = parserutils_vector_peek(vector, *ctx);
+ } else {
+ break;
+ }
+
+ if (*ctx == prev_ctx)
+ break;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ /* Now expect a font-size */
+ error = parse_font_size(c, vector, ctx, &size);
+ if (error != CSS_OK)
+ goto cleanup;
+
+ consumeWhitespace(vector, ctx);
+
+ /* Potential line-height */
+ token = parserutils_vector_peek(vector, *ctx);
+ if (token != NULL && tokenIsChar(token, '/')) {
+ parserutils_vector_iterate(vector, ctx);
+
+ consumeWhitespace(vector, ctx);
+
+ error = parse_line_height(c, vector, ctx, &line_height);
+ if (error != CSS_OK)
+ goto cleanup;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ /* Now expect a font-family */
+ error = parse_font_family(c, vector, ctx, &family);
+ if (error != CSS_OK)
+ goto cleanup;
+
+ /* Must have size and family */
+ assert(size != NULL);
+ assert(family != NULL);
+
+ /* Calculate the required size of the resultant style,
+ * defaulting the unspecified properties to their initial values */
+ required_size = 0;
+
+ if (style)
+ required_size += style->length;
+ else
+ required_size += sizeof(uint32_t);
+
+ if (variant)
+ required_size += variant->length;
+ else
+ required_size += sizeof(uint32_t);
+
+ if (weight)
+ required_size += weight->length;
+ else
+ required_size += sizeof(uint32_t);
+
+ required_size += size->length;
+
+ if (line_height)
+ required_size += line_height->length;
+ else
+ required_size += sizeof(uint32_t);
+
+ required_size += family->length;
+
+ /* Create and populate it */
+ error = css_stylesheet_style_create(c->sheet, required_size, &ret);
+ if (error != CSS_OK)
+ goto cleanup;
+
+ required_size = 0;
+
+ if (style) {
+ memcpy(((uint8_t *) ret->bytecode) + required_size,
+ style->bytecode, style->length);
+ required_size += style->length;
+ } else {
+ void *bc = ((uint8_t *) ret->bytecode) + required_size;
+
+ *((uint32_t *) bc) = buildOPV(CSS_PROP_FONT_STYLE,
+ 0, FONT_STYLE_NORMAL);
+ required_size += sizeof(uint32_t);
+ }
+
+ if (variant) {
+ memcpy(((uint8_t *) ret->bytecode) + required_size,
+ variant->bytecode, variant->length);
+ required_size += variant->length;
+ } else {
+ void *bc = ((uint8_t *) ret->bytecode) + required_size;
+
+ *((uint32_t *) bc) = buildOPV(CSS_PROP_FONT_VARIANT,
+ 0, FONT_VARIANT_NORMAL);
+ required_size += sizeof(uint32_t);
+ }
+
+ if (weight) {
+ memcpy(((uint8_t *) ret->bytecode) + required_size,
+ weight->bytecode, weight->length);
+ required_size += weight->length;
+ } else {
+ void *bc = ((uint8_t *) ret->bytecode) + required_size;
+
+ *((uint32_t *) bc) = buildOPV(CSS_PROP_FONT_WEIGHT,
+ 0, FONT_WEIGHT_NORMAL);
+ required_size += sizeof(uint32_t);
+ }
+
+ memcpy(((uint8_t *) ret->bytecode) + required_size,
+ size->bytecode, size->length);
+ required_size += size->length;
+
+ if (line_height) {
+ memcpy(((uint8_t *) ret->bytecode) + required_size,
+ line_height->bytecode, line_height->length);
+ required_size += line_height->length;
+ } else {
+ void *bc = ((uint8_t *) ret->bytecode) + required_size;
+
+ *((uint32_t *) bc) = buildOPV(CSS_PROP_LINE_HEIGHT,
+ 0, LINE_HEIGHT_NORMAL);
+ required_size += sizeof(uint32_t);
+ }
+
+ memcpy(((uint8_t *) ret->bytecode) + required_size,
+ family->bytecode, family->length);
+ required_size += family->length;
+
+ assert(required_size == ret->length);
+
+ /* Write the result */
+ *result = ret;
+ /* Invalidate ret, so that cleanup doesn't destroy it */
+ ret = NULL;
+
+ /* Clean up after ourselves */
+cleanup:
+ if (style)
+ css_stylesheet_style_destroy(c->sheet, style);
+ if (variant)
+ css_stylesheet_style_destroy(c->sheet, variant);
+ if (weight)
+ css_stylesheet_style_destroy(c->sheet, weight);
+ if (size)
+ css_stylesheet_style_destroy(c->sheet, size);
+ if (line_height)
+ css_stylesheet_style_destroy(c->sheet, line_height);
+ if (family)
+ css_stylesheet_style_destroy(c->sheet, family);
+ if (ret)
+ css_stylesheet_style_destroy(c->sheet, ret);
+
+ if (error != CSS_OK)
+ *ctx = orig_ctx;
+
+ return error;
+}
+
+
+/**
* Determine if a given font-family ident is reserved
*
* \param c Parsing context
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-16 15:33:21 +0000