simple properties split in parse similar to select in preparation for future generation

svn path=/trunk/libcss/; revision=11188

1 files changed, 134 insertions, 0 deletions

diff --git a/src/parse/properties/content.c b/src/parse/properties/content.c
new file mode 100644
index 0000000..7f37400
--- /dev/null
+++ b/src/parse/properties/content.c
@@ -0,0 +1,134 @@
+/*
+ * 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 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;
+	uint8_t flags = 0;
+	uint16_t value = 0;
+	uint32_t opv;
+	uint32_t required_size = sizeof(opv);
+	int temp_ctx = *ctx;
+	uint8_t *ptr;
+	bool match;
+
+	/* IDENT(normal, none, inherit) |
+	 * [
+	 *	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? ')'
+	 * ]+
+	 */
+
+	/* Pass 1: Calculate required size & validate input */
+	token = parserutils_vector_peek(vector, temp_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)) {
+		flags = FLAG_INHERIT;
+		parserutils_vector_iterate(vector, &temp_ctx);
+	} else if (token->type == CSS_TOKEN_IDENT &&
+			 (lwc_string_caseless_isequal(
+			token->idata, c->strings[NORMAL],
+			&match) == lwc_error_ok && match)) {
+		value = CONTENT_NORMAL;
+		parserutils_vector_iterate(vector, &temp_ctx);
+	} else if (token->type == CSS_TOKEN_IDENT &&
+			 (lwc_string_caseless_isequal(
+			token->idata, c->strings[NONE],
+			&match) == lwc_error_ok && match)) {
+		value = CONTENT_NONE;
+		parserutils_vector_iterate(vector, &temp_ctx);
+	} else {
+		uint32_t len;
+
+		error = parse_content_list(c, vector, &temp_ctx, &value,
+				NULL, &len);
+		if (error != CSS_OK) {
+			*ctx = orig_ctx;
+			return error;
+		}
+
+		required_size += len;
+	}
+
+	opv = buildOPV(CSS_PROP_CONTENT, flags, value);
+
+	/* Allocate result */
+	error = css_stylesheet_style_create(c->sheet, required_size, result);
+	if (error != CSS_OK) {
+		*ctx = orig_ctx;
+		return error;
+	}
+
+	/* Copy OPV to bytecode */
+	ptr = (*result)->bytecode;
+	memcpy(ptr, &opv, sizeof(opv));
+	ptr += sizeof(opv);
+
+	/* Pass 2: construct bytecode */
+	token = parserutils_vector_peek(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) ||
+			 (lwc_string_caseless_isequal(
+			token->idata, c->strings[NORMAL],
+			&match) == lwc_error_ok && match) ||
+			 (lwc_string_caseless_isequal(
+			token->idata, c->strings[NONE],
+			&match) == lwc_error_ok && match))) {
+		parserutils_vector_iterate(vector, ctx);
+	} else {
+		error = parse_content_list(c, vector, ctx, NULL, ptr, NULL);
+		if (error != CSS_OK) {
+			*ctx = orig_ctx;
+			return error;
+		}
+	}
+
+	return CSS_OK;
+}