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-rw-r--r--src/parse/properties/background.c124
1 files changed, 108 insertions, 16 deletions
diff --git a/src/parse/properties/background.c b/src/parse/properties/background.c
index 491b092..ca20c7d 100644
--- a/src/parse/properties/background.c
+++ b/src/parse/properties/background.c
@@ -16,7 +16,7 @@
/**
* Parse background-attachment
*
- * \param c Parsing context
+ * \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
@@ -71,10 +71,25 @@ css_error parse_background_attachment(css_language *c,
return CSS_OK;
}
+/**
+ * Parse background-color
+ *
+ * \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 a valid background-attachment
+ *
+ * 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_background_color(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;
@@ -85,8 +100,10 @@ css_error parse_background_color(css_language *c,
/* colour | IDENT (transparent, inherit) */
token = parserutils_vector_peek(vector, *ctx);
- if (token == NULL)
+ if (token == NULL) {
+ *ctx = orig_ctx;
return CSS_INVALID;
+ }
if (token->type == CSS_TOKEN_IDENT &&
token->ilower == c->strings[INHERIT]) {
@@ -98,8 +115,10 @@ css_error parse_background_color(css_language *c,
value = BACKGROUND_COLOR_TRANSPARENT;
} else {
error = parse_colour_specifier(c, vector, ctx, &colour);
- if (error != CSS_OK)
+ if (error != CSS_OK) {
+ *ctx = orig_ctx;
return error;
+ }
value = BACKGROUND_COLOR_SET;
}
@@ -112,8 +131,10 @@ css_error parse_background_color(css_language *c,
/* Allocate result */
error = css_stylesheet_style_create(c->sheet, required_size, result);
- if (error != CSS_OK)
+ if (error != CSS_OK) {
+ *ctx = orig_ctx;
return error;
+ }
/* Copy the bytecode to it */
memcpy((*result)->bytecode, &opv, sizeof(opv));
@@ -125,10 +146,25 @@ css_error parse_background_color(css_language *c,
return CSS_OK;
}
+/**
+ * Parse background-image
+ *
+ * \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 a valid background-attachment
+ *
+ * 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_background_image(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;
@@ -139,8 +175,10 @@ css_error parse_background_image(css_language *c,
/* URI | IDENT (none, inherit) */
token = parserutils_vector_iterate(vector, ctx);
if (token == NULL || (token->type != CSS_TOKEN_IDENT &&
- token->type != CSS_TOKEN_URI))
+ token->type != CSS_TOKEN_URI)) {
+ *ctx = orig_ctx;
return CSS_INVALID;
+ }
if (token->type == CSS_TOKEN_IDENT &&
token->ilower == c->strings[INHERIT]) {
@@ -150,8 +188,10 @@ css_error parse_background_image(css_language *c,
value = BACKGROUND_IMAGE_NONE;
} else if (token->type == CSS_TOKEN_URI) {
value = BACKGROUND_IMAGE_URI;
- } else
+ } else {
+ *ctx = orig_ctx;
return CSS_INVALID;
+ }
opv = buildOPV(CSS_PROP_BACKGROUND_IMAGE, flags, value);
@@ -161,8 +201,10 @@ css_error parse_background_image(css_language *c,
/* Allocate result */
error = css_stylesheet_style_create(c->sheet, required_size, result);
- if (error != CSS_OK)
+ if (error != CSS_OK) {
+ *ctx = orig_ctx;
return error;
+ }
/* Copy the bytecode to it */
memcpy((*result)->bytecode, &opv, sizeof(opv));
@@ -176,10 +218,25 @@ css_error parse_background_image(css_language *c,
return CSS_OK;
}
+/**
+ * Parse background-position
+ *
+ * \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 a valid background-attachment
+ *
+ * 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_background_position(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;
@@ -192,8 +249,10 @@ css_error parse_background_position(css_language *c,
/* [length | percentage | IDENT(left, right, top, bottom, center)]{1,2}
* | IDENT(inherit) */
token = parserutils_vector_peek(vector, *ctx);
- if (token == NULL)
+ if (token == NULL) {
+ *ctx = orig_ctx;
return CSS_INVALID;
+ }
if (token->type == CSS_TOKEN_IDENT &&
token->ilower == c->strings[INHERIT]) {
@@ -231,18 +290,23 @@ css_error parse_background_position(css_language *c,
value[i] =
BACKGROUND_POSITION_VERT_CENTER;
} else {
+ *ctx = orig_ctx;
return CSS_INVALID;
}
} else {
error = parse_unit_specifier(c, vector, ctx,
UNIT_PX, &length[i], &unit[i]);
- if (error != CSS_OK)
+ if (error != CSS_OK) {
+ *ctx = orig_ctx;
return error;
+ }
if (unit[i] & UNIT_ANGLE ||
unit[i] & UNIT_TIME ||
- unit[i] & UNIT_FREQ)
+ unit[i] & UNIT_FREQ) {
+ *ctx = orig_ctx;
return CSS_INVALID;
+ }
/* We'll fix this up later, too */
value[i] = BACKGROUND_POSITION_VERT_SET;
@@ -268,6 +332,7 @@ css_error parse_background_position(css_language *c,
value[0] = BACKGROUND_POSITION_HORZ_SET;
break;
default:
+ *ctx = orig_ctx;
return CSS_INVALID;
}
@@ -277,8 +342,10 @@ css_error parse_background_position(css_language *c,
/* Two keywords. Verify the axes differ */
if (((value[0] & 0xf) != 0 && (value[1] & 0xf) != 0) ||
((value[0] & 0xf0) != 0 &&
- (value[1] & 0xf0) != 0))
+ (value[1] & 0xf0) != 0)) {
+ *ctx = orig_ctx;
return CSS_INVALID;
+ }
} else {
/* One or two non-keywords. First is horizontal */
if (value[0] == BACKGROUND_POSITION_VERT_SET)
@@ -287,8 +354,10 @@ css_error parse_background_position(css_language *c,
/* Verify the axes differ */
if (((value[0] & 0xf) != 0 && (value[1] & 0xf) != 0) ||
((value[0] & 0xf0) != 0 &&
- (value[1] & 0xf0) != 0))
+ (value[1] & 0xf0) != 0)) {
+ *ctx = orig_ctx;
return CSS_INVALID;
+ }
}
}
@@ -304,8 +373,10 @@ css_error parse_background_position(css_language *c,
/* Allocate result */
error = css_stylesheet_style_create(c->sheet, required_size, result);
- if (error != CSS_OK)
+ if (error != CSS_OK) {
+ *ctx = orig_ctx;
return error;
+ }
/* Copy the bytecode to it */
memcpy((*result)->bytecode, &opv, sizeof(opv));
@@ -327,10 +398,25 @@ css_error parse_background_position(css_language *c,
return CSS_OK;
}
+/**
+ * Parse background-repeat
+ *
+ * \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 a valid background-attachment
+ *
+ * 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_background_repeat(css_language *c,
const parserutils_vector *vector, int *ctx,
css_style **result)
{
+ int orig_ctx = *ctx;
css_error error;
const css_token *ident;
uint8_t flags = 0;
@@ -339,8 +425,10 @@ css_error parse_background_repeat(css_language *c,
/* IDENT (no-repeat, repeat-x, repeat-y, repeat, inherit) */
ident = parserutils_vector_iterate(vector, ctx);
- if (ident == NULL || ident->type != CSS_TOKEN_IDENT)
+ if (ident == NULL || ident->type != CSS_TOKEN_IDENT) {
+ *ctx = orig_ctx;
return CSS_INVALID;
+ }
if (ident->ilower == c->strings[INHERIT]) {
flags |= FLAG_INHERIT;
@@ -352,15 +440,19 @@ css_error parse_background_repeat(css_language *c,
value = BACKGROUND_REPEAT_REPEAT_Y;
} else if (ident->ilower == c->strings[REPEAT]) {
value = BACKGROUND_REPEAT_REPEAT;
- } else
+ } else {
+ *ctx = orig_ctx;
return CSS_INVALID;
+ }
opv = buildOPV(CSS_PROP_BACKGROUND_REPEAT, flags, value);
/* Allocate result */
error = css_stylesheet_style_create(c->sheet, sizeof(opv), result);
- if (error != CSS_OK)
+ if (error != CSS_OK) {
+ *ctx = orig_ctx;
return error;
+ }
/* Copy the bytecode to it */
memcpy((*result)->bytecode, &opv, sizeof(opv));
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-16 08:05:49 +0000