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commitdiff
http://git.netsurf-browser.org/libcss.git/commit/?id=7d759aba6639709b23b92f9fb6cb29099ff612d3
commit 7d759aba6639709b23b92f9fb6cb29099ff612d3
Author: John-Mark Bell <[email protected]>
Commit: John-Mark Bell <[email protected]>
Media Queries: parse features
diff --git a/src/parse/mq.c b/src/parse/mq.c
index 5c9c7fa..96f70df 100644
--- a/src/parse/mq.c
+++ b/src/parse/mq.c
@@ -7,7 +7,443 @@
/* https://drafts.csswg.org/mediaqueries/ */
+#include <libcss/fpmath.h>
+
+#include "bytecode/bytecode.h"
#include "parse/mq.h"
+#include "parse/properties/utils.h"
+#include "utils/utils.h"
+
+static css_error mq_parse_ratio(css_language *c,
+ const parserutils_vector *vector, int *ctx,
+ const css_token *numerator, css_fixed *ratio)
+{
+ const css_token *token;
+ css_fixed num, den;
+ size_t num_len, den_len;
+
+ /* NUMBER ws* '/' ws* NUMBER */
+
+ /* numerator, ws* already consumed */
+
+ token = parserutils_vector_iterate(vector, ctx);
+ if (token == NULL || tokenIsChar(token, '/') == false) {
+ return CSS_INVALID;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ token = parserutils_vector_iterate(vector, ctx);
+ if (token == NULL || token->type != CSS_TOKEN_NUMBER) {
+ return CSS_INVALID;
+ }
+
+ num = css__number_from_lwc_string(numerator->idata, true, &num_len);
+ den = css__number_from_lwc_string(token->idata, true, &den_len);
+
+ *ratio = css_divide_fixed(num, den);
+
+ return CSS_OK;
+}
+
+static css_error mq_create_feature(
+ lwc_string *name,
+ css_mq_feature **feature)
+{
+ css_mq_feature *f;
+
+ f = malloc(sizeof(*f));
+ if (f == NULL) {
+ return CSS_NOMEM;
+ }
+
+ memset(f, 0, sizeof(*f));
+
+ f->name = lwc_string_ref(name);
+
+ *feature = f;
+
+ return CSS_OK;
+}
+
+static css_error mq_populate_value(css_mq_value *value,
+ const css_token *token)
+{
+ if (token->type == CSS_TOKEN_NUMBER) {
+ size_t num_len;
+ value->type = CSS_MQ_VALUE_TYPE_NUM;
+ value->data.num_or_ratio = css__number_from_lwc_string(
+ token->idata, false, &num_len);
+ } else if (token->type == CSS_TOKEN_DIMENSION) {
+ size_t len = lwc_string_length(token->idata);
+ const char *data = lwc_string_data(token->idata);
+ uint32_t unit = UNIT_PX;
+ size_t consumed;
+
+ value->type == CSS_MQ_VALUE_TYPE_DIM;
+ value->data.dim.len = css__number_from_lwc_string(
+ token->idata, false, &consumed);
+ error = css__parse_unit_keyword(data + consumed, len - consumed,
+ &unit);
+ if (error != CSS_OK) {
+ return error;
+ }
+ value->data.dim.unit = temp_unit;
+ } else if (token->type == CSS_TOKEN_IDENT) {
+ value->type = CSS_MQ_VALUE_TYPE_IDENT;
+ value->data.ident = lwc_string_ref(token->idata);
+ }
+
+ return CSS_OK;
+}
+
+static css_error mq_parse_op(const css_token *token,
+ css_mq_feature_op *op)
+{
+ size_t len;
+ const char *data;
+
+ if (token == NULL || token->type != CSS_TOKEN_CHAR)
+ return CSS_INVALID;
+
+ len = lwc_string_length(token->idata);
+ data = lwc_string_data(token->idata);
+
+ if (len == 2) {
+ if (strncasecmp(data, "<=", 2) == 0)
+ *op = CSS_MQ_FEATURE_OP_LTE;
+ else if (strncasecmp(data, ">=", 2) == 0)
+ *op = CSS_MQ_FEATURE_OP_GTE;
+ else
+ return CSS_INVALID;
+ } else if (len == 1) {
+ if (*data == '<')
+ *op = CSS_MQ_FEATURE_OP_LT;
+ else if (*data == '=')
+ *op = CSS_MQ_FEATURE_OP_EQ;
+ else if (*data == '>')
+ *op = CSS_MQ_FEATURE_OP_GT;
+ else
+ return CSS_INVALID;
+ } else {
+ return CSS_INVALID;
+ }
+
+ return CSS_OK;
+}
+
+static css_error mq_parse_range(css_language *c,
+ const parserutils_vector *vector, int *ctx,
+ const css_token *name_or_value,
+ css_mq_feature **feature)
+{
+ const css_token *token, *value_or_name, *name = NULL, *value2 = NULL;
+ css_mq_feature *result;
+ css_mq_feature_op op, op2;
+ css_fixed ratio, ratio2;
+ bool name_first = false, value_is_ratio = false, value2_is_ratio =
false, match;
+ css_error error;
+
+ /* <mf-range> = <mf-name> [ '<' | '>' ]? '='? <mf-value>
+ * | <mf-value> [ '<' | '>' ]? '='? <mf-name>
+ * | <mf-value> '<' '='? <mf-name> '<' '='? <mf-value>
+ * | <mf-value> '>' '='? <mf-name> '>' '='? <mf-value>
+ */
+
+ if (name_or_value == NULL || (name_or_value->type != CSS_TOKEN_NUMBER &&
+ name_or_value->type != CSS_TOKEN_DIMENSION &&
+ name_or_value->type != CSS_TOKEN_IDENT)) {
+ return CSS_INVALID;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ /* Name-or-value */
+ if (name_or_value->type == CSS_TOKEN_NUMBER &&
+ tokenIsChar(parserutils_vector_peek(vector, *ctx),
'/')) {
+ /* ratio */
+ error = mq_parse_ratio(c, vector, ctx, token, &ratio);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ value_is_ratio = true;
+ } else if (name_or_value->type == CSS_TOKEN_IDENT &&
+ lwc_string_caseless_isequal(name_or_value->idata,
+ c->strings[INFINITE], &match) == lwc_error_ok
&&
+ match == false) {
+ /* The only ident permitted for mf-value is 'infinite', thus
must have name */
+ name = name_or_value;
+ name_first = true;
+ }
+
+ /* Op */
+ token = parserutils_vector_iterate(vector, ctx);
+ error = mq_parse_op(token, &op);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ /* Value-or-name */
+ value_or_name = parserutils_vector_iterate(vector, ctx);
+ if (value_or_name == NULL || (value_or_name->type != CSS_TOKEN_NUMBER &&
+ value_or_name->type != CSS_TOKEN_DIMENSION &&
+ value_or_name->type != CSS_TOKEN_IDENT)) {
+ return CSS_INVALID;
+ }
+
+ if (name == NULL) {
+ if (value_or_name->type != CSS_TOKEN_IDENT) {
+ return CSS_INVALID;
+ } else {
+ name = value_or_name;
+ }
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ if (value_or_name->type == CSS_TOKEN_NUMBER &&
+ tokenIsChar(parserutils_vector_peek(vector, *ctx),
'/')) {
+ /* ratio */
+ error = mq_parse_ratio(c, vector, ctx, token, &ratio);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ value_is_ratio = true;
+ }
+
+ token = parserutils_vector_peek(vector, *ctx);
+ if (name_first == false && token != NULL && tokenIsChar(token, ')') ==
false) {
+ /* Op2 */
+ token = parserutils_vector_iterate(vector, ctx);
+ error = mq_parse_op(token, &op2);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ /* Validate operators: must both be LT(E) or GT(E) */
+ if (op == CSS_MQ_FEATURE_OP_LT || op == CSS_MQ_FEATURE_OP_LTE) {
+ if (op2 != CSS_MQ_FEATURE_OP_LT && op2 !=
CSS_MQ_FEATURE_OP_LTE) {
+ return CSS_INVALID;
+ }
+ } else if (op == CSS_MQ_FEATURE_OP_GT || op ==
CSS_MQ_FEATURE_OP_GTE) {
+ if (op2 != CSS_MQ_FEATURE_OP_GT && op2 !=
CSS_MQ_FEATURE_OP_GTE) {
+ return CSS_INVALID;
+ }
+ } else {
+ return CSS_INVALID;
+ }
+
+ /* Value2 */
+ value2 = parserutils_vector_iterate(vector, ctx);
+ if (value2 == NULL || (value2->type != CSS_TOKEN_NUMBER &&
+ value2->type != CSS_TOKEN_DIMENSION &&
+ value2->type != CSS_TOKEN_IDENT)) {
+ return CSS_INVALID;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ if (value_or_name->type == CSS_TOKEN_NUMBER &&
+ tokenIsChar(parserutils_vector_peek(vector,
*ctx), '/')) {
+ /* ratio */
+ error = mq_parse_ratio(c, vector, ctx, token, &ratio2);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ value2_is_ratio = true;
+ }
+ }
+
+ error = mq_create_feature(name->idata, &result);
+ if (error != CSS_OK) {
+ return error;
+ }
+ if (name_first) {
+ /* Invert operator */
+ if (op == CSS_MQ_FEATURE_OP_LT) {
+ op = CSS_MQ_FEATURE_OP_GTE;
+ } else if (op == CSS_MQ_FEATURE_OP_LTE) {
+ op = CSS_MQ_FEATURE_OP_GT;
+ } else if (op == CSS_MQ_FEATURE_OP_GT) {
+ op = CSS_MQ_FEATURE_OP_LTE;
+ } else if (op == CSS_MQ_FEATURE_OP_GTE) {
+ op = CSS_MQ_FEATURE_OP_LT;
+ }
+ }
+ result->op = op;
+ if (value_is_ratio) {
+ result->value.type = CSS_MQ_VALUE_TYPE_RATIO;
+ result->value.data.num_or_ratio = ratio;
+ } else {
+ /* num/dim/ident */
+ error = mq_populate_value(&result->value, token);
+ if (error != CSS_OK) {
+ free(result);
+ return error;
+ }
+ }
+ if (value2 != NULL) {
+ result->op2 = op2;
+ if (value2_is_ratio) {
+ result->value2.type = CSS_MQ_VALUE_TYPE_RATIO;
+ result->value2.data.num_or_ratio = ratio;
+ } else {
+ /* num/dim/ident */
+ error = mq_populate_value(&result->value2, token);
+ if (error != CSS_OK) {
+ /* TODO: clean up result properly? */
+ free(result);
+ return error;
+ }
+ }
+ }
+
+ *feature = result;
+
+ return CSS_OK;
+}
+
+static css_error mq_parse_media_feature(css_language *c,
+ const parserutils_vector *vector, int *ctx,
+ css_mq_feature **feature)
+{
+ const css_token *name_or_value, *token;
+ css_mq_feature *result;
+ css_error error;
+
+ /* <media-feature> = ( [ <mf-plain> | <mf-boolean> | <mf-range> ] )
+ * <mf-plain> = <mf-name> : <mf-value>
+ * <mf-boolean> = <mf-name>
+ * <mf-name> = <ident>
+ * <mf-value> = <number> | <dimension> | <ident> | <ratio>
+ */
+
+ /* ( already consumed */
+
+ name_or_value = parserutils_vector_iterate(vector, ctx);
+ if (name_or_value == NULL)
+ return CSS_INVALID;
+
+ if (name_or_value->type == CSS_TOKEN_IDENT) {
+ consumeWhitespace(vector, ctx);
+
+ token = parserutils_vector_peek(vector, *ctx);
+ if (tokenIsChar(token, ')')) {
+ /* mf-boolean */
+ error = mq_create_feature(name_or_value->idata,
&result);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ result->op = CSS_MQ_FEATURE_OP_BOOL;
+ } else if (tokenIsChar(token, ':')) {
+ /* mf-plain */
+ parserutils_vector_iterate(vector, ctx);
+
+ consumeWhitespace(vector, ctx);
+
+ token = parserutils_vector_iterate(vector, ctx);
+ if (token == NULL || (token->type != CSS_TOKEN_NUMBER &&
+ token->type != CSS_TOKEN_DIMENSION &&
+ token->type != CSS_TOKEN_IDENT)) {
+ return CSS_INVALID;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ error = mq_create_feature(name_or_value->idata,
&result);
+ if (error != CSS_OK) {
+ return error;
+ }
+ result->op = CSS_MQ_FEATURE_OP_EQ;
+
+ if (token->type == CSS_TOKEN_NUMBER &&
+
tokenIsChar(parserutils_vector_peek(vector, *ctx), '/')) {
+ /* ratio */
+ css_fixed ratio;
+
+ error = mq_parse_ratio(c, vector, ctx, token,
&ratio);
+ if (error != CSS_OK) {
+ free(result);
+ return error;
+ }
+
+ result->value.type = CSS_MQ_VALUE_TYPE_RATIO;
+ result->value.data.num_or_ratio = ratio;
+ } else {
+ /* num/dim/ident */
+ error = mq_populate_value(&result->value,
token);
+ if (error != CSS_OK) {
+ free(result);
+ return error;
+ }
+ }
+
+ consumeWhitespace(vector, ctx);
+ } else {
+ /* mf-range */
+ error = mq_parse_range(c, vector, ctx, name_or_value,
&result);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+ }
+ } else {
+ /* mf-range */
+ error = mq_parse_range(c, vector, ctx, name_or_value, &result);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+ }
+
+ token = parserutils_vector_iterate(vector, ctx);
+ if (tokenIsChar(token, ')') == false) {
+ /* TODO: clean up result */
+ return CSS_INVALID;
+ }
+
+ *feature = result;
+
+ return CSS_OK;
+}
+
+static css_error mq_parse_media_in_parens()
+{
+ /* <media-in-parens> = ( <media-condition> ) | <media-feature> |
<general-enclosed>
+ * <general-enclosed> = [ <function-token> <any-value> ) ] | ( <ident>
<any-value> )
+ */
+
+ //LPAREN -> condition-or-feature
+ // "not" or LPAREN -> condition
+ // IDENT | NUMBER | DIMENSION | RATIO -> feature
+
+}
+
+static css_error mq_parse_condition()
+{
+ /* <media-condition> = <media-not> | <media-in-parens> [ <media-and>* |
<media-or>* ]
+ * <media-condition-without-or> = <media-not> | <media-in-parens>
<media-and>*
+ * <media-not> = not <media-in-parens>
+ * <media-and> = and <media-in-parens>
+ * <media-or> = or <media-in-parens>
+ */
+}
css_error css__mq_parse_media_list(css_language *c,
const parserutils_vector *vector, int *ctx,
@@ -16,7 +452,19 @@ css_error css__mq_parse_media_list(css_language *c,
css_mq_query *ret = NULL;
const css_token *token;
- /* (IDENT ws (',' ws IDENT ws)* )? */
+ /* <media-query-list> = <media-query> [ COMMA <media-query> ]*
+ * <media-query> = <media-condition>
+ * | [ not | only ]? <media-type> [ and
<media-condition-without-or> ]?
+ * <media-type> = <ident> (except "not", "and", "or", "only")
+ *
+ */
+
+ /* if {[(, push }]) to stack
+ * if func, push ) to stack
+ * on error, scan forward until stack is empty (or EOF), popping
matching tokens off stack
+ * if stack is empty, the next input token must be comma or EOF
+ * if comma, consume, and start again from the next input token
+ */
UNUSED(c);
diff --git a/src/parse/mq.h b/src/parse/mq.h
index 7d62e8c..c5268c7 100644
--- a/src/parse/mq.h
+++ b/src/parse/mq.h
@@ -22,7 +22,7 @@ typedef struct {
css_fixed num_or_ratio; /* Where ratio is the result of a/b */
struct {
css_fixed len;
- css_unit unit;
+ uint32_t unit;
} dim;
lwc_string *ident;
} data;
@@ -31,8 +31,8 @@ typedef struct {
/*
* "name : value" is encoded as "name = value"
* "name" is encoded by setting the operator to "bool"
- * "name op value" is encoded verbatim (with op2 set to "unused")
- * "value op name" inverts the operator to encode (i.e < becomes >=) (and sets
op2 to "unused")
+ * "value op name" is encoded verbatim (with op2 set to "unused")
+ * "name op value" inverts the operator to encode (i.e < becomes >=) (and sets
op2 to "unused")
* "value op name op value" is encoded using op2 and value2
*/
typedef enum {
commitdiff
http://git.netsurf-browser.org/libcss.git/commit/?id=40936ea51e4a3d6b0ac0a3a679519275e91544d7
commit 40936ea51e4a3d6b0ac0a3a679519275e91544d7
Author: John-Mark Bell <[email protected]>
Commit: John-Mark Bell <[email protected]>
Units: parse new unit names
diff --git a/src/bytecode/bytecode.h b/src/bytecode/bytecode.h
index 4ac3dfb..cd93eb2 100644
--- a/src/bytecode/bytecode.h
+++ b/src/bytecode/bytecode.h
@@ -32,6 +32,18 @@ typedef enum unit {
UNIT_MM = 5,
UNIT_PT = 6,
UNIT_PC = 7,
+ UNIT_Q = 8,
+ UNIT_CH = 9,
+ UNIT_IC = 10,
+ UNIT_REM = 11,
+ UNIT_LH = 12,
+ UNIT_RLH = 13,
+ UNIT_VW = 14,
+ UNIT_VH = 15,
+ UNIT_VI = 16,
+ UNIT_VB = 17,
+ UNIT_VMIN = 18,
+ UNIT_VMAX = 19,
UNIT_PCT = (1 << 8),
@@ -39,6 +51,7 @@ typedef enum unit {
UNIT_DEG = (1 << 9) + 0,
UNIT_GRAD = (1 << 9) + 1,
UNIT_RAD = (1 << 9) + 2,
+ UNIT_TURN = (1 << 9) + 3,
UNIT_TIME = (1 << 10),
UNIT_MS = (1 << 10) + 0,
@@ -46,7 +59,12 @@ typedef enum unit {
UNIT_FREQ = (1 << 11),
UNIT_HZ = (1 << 11) + 0,
- UNIT_KHZ = (1 << 11) + 1
+ UNIT_KHZ = (1 << 11) + 1,
+
+ UNIT_RESOLUTION = (1 << 12),
+ UNIT_DPI = (1 << 12) + 0,
+ UNIT_DPCM = (1 << 12) + 1,
+ UNIT_DPPX = (1 << 12) + 2,
} unit;
typedef uint32_t colour;
diff --git a/src/parse/properties/utils.c b/src/parse/properties/utils.c
index 82dacf8..97583c6 100644
--- a/src/parse/properties/utils.c
+++ b/src/parse/properties/utils.c
@@ -1007,6 +1007,16 @@ css_error css__parse_unit_keyword(const char *ptr,
size_t len, uint32_t *unit)
if (len == 4) {
if (strncasecmp(ptr, "grad", 4) == 0)
*unit = UNIT_GRAD;
+ else if (strncasecmp(ptr, "turn", 4) == 0)
+ *unit = UNIT_TURN;
+ else if (strncasecmp(ptr, "dppx", 4) == 0)
+ *unit = UNIT_DPPX;
+ else if (strncasecmp(ptr, "dpcm", 4) == 0)
+ *unit = UNIT_DPCM;
+ else if (strncasecmp(ptr, "vmin", 4) == 0)
+ *unit = UNIT_VMIN;
+ else if (strncasecmp(ptr, "vmax", 4) == 0)
+ *unit = UNIT_VMAX;
else
return CSS_INVALID;
} else if (len == 3) {
@@ -1016,6 +1026,12 @@ css_error css__parse_unit_keyword(const char *ptr,
size_t len, uint32_t *unit)
*unit = UNIT_DEG;
else if (strncasecmp(ptr, "rad", 3) == 0)
*unit = UNIT_RAD;
+ else if (strncasecmp(ptr, "dpi", 3) == 0)
+ *unit = UNIT_DPI;
+ else if (strncasecmp(ptr, "rlh", 3) == 0)
+ *unit = UNIT_RLH;
+ else if (strncasecmp(ptr, "rem", 3) == 0)
+ *unit = UNIT_REM;
else
return CSS_INVALID;
} else if (len == 2) {
@@ -1039,11 +1055,27 @@ css_error css__parse_unit_keyword(const char *ptr,
size_t len, uint32_t *unit)
*unit = UNIT_PT;
else if (strncasecmp(ptr, "pc", 2) == 0)
*unit = UNIT_PC;
+ else if (strncasecmp(ptr, "ch", 2) == 0)
+ *unit = UNIT_CH;
+ else if (strncasecmp(ptr, "ic", 2) == 0)
+ *unit = UNIT_IC;
+ else if (strncasecmp(ptr, "lh", 2) == 0)
+ *unit = UNIT_LH;
+ else if (strncasecmp(ptr, "vw", 2) == 0)
+ *unit = UNIT_VW;
+ else if (strncasecmp(ptr, "vh", 2) == 0)
+ *unit = UNIT_VH;
+ else if (strncasecmp(ptr, "vi", 2) == 0)
+ *unit = UNIT_VI;
+ else if (strncasecmp(ptr, "vb", 2) == 0)
+ *unit = UNIT_VB;
else
return CSS_INVALID;
} else if (len == 1) {
if (strncasecmp(ptr, "s", 1) == 0)
*unit = UNIT_S;
+ else if (strncasecmp(ptr, "Q", 1) == 0)
+ *unit = UNIT_Q;
else
return CSS_INVALID;
} else
-----------------------------------------------------------------------
Summary of changes:
src/bytecode/bytecode.h | 20 +-
src/parse/mq.c | 450 +++++++++++++++++++++++++++++++++++++++++-
src/parse/mq.h | 6 +-
src/parse/properties/utils.c | 32 +++
4 files changed, 503 insertions(+), 5 deletions(-)
diff --git a/src/bytecode/bytecode.h b/src/bytecode/bytecode.h
index 4ac3dfb..cd93eb2 100644
--- a/src/bytecode/bytecode.h
+++ b/src/bytecode/bytecode.h
@@ -32,6 +32,18 @@ typedef enum unit {
UNIT_MM = 5,
UNIT_PT = 6,
UNIT_PC = 7,
+ UNIT_Q = 8,
+ UNIT_CH = 9,
+ UNIT_IC = 10,
+ UNIT_REM = 11,
+ UNIT_LH = 12,
+ UNIT_RLH = 13,
+ UNIT_VW = 14,
+ UNIT_VH = 15,
+ UNIT_VI = 16,
+ UNIT_VB = 17,
+ UNIT_VMIN = 18,
+ UNIT_VMAX = 19,
UNIT_PCT = (1 << 8),
@@ -39,6 +51,7 @@ typedef enum unit {
UNIT_DEG = (1 << 9) + 0,
UNIT_GRAD = (1 << 9) + 1,
UNIT_RAD = (1 << 9) + 2,
+ UNIT_TURN = (1 << 9) + 3,
UNIT_TIME = (1 << 10),
UNIT_MS = (1 << 10) + 0,
@@ -46,7 +59,12 @@ typedef enum unit {
UNIT_FREQ = (1 << 11),
UNIT_HZ = (1 << 11) + 0,
- UNIT_KHZ = (1 << 11) + 1
+ UNIT_KHZ = (1 << 11) + 1,
+
+ UNIT_RESOLUTION = (1 << 12),
+ UNIT_DPI = (1 << 12) + 0,
+ UNIT_DPCM = (1 << 12) + 1,
+ UNIT_DPPX = (1 << 12) + 2,
} unit;
typedef uint32_t colour;
diff --git a/src/parse/mq.c b/src/parse/mq.c
index 5c9c7fa..96f70df 100644
--- a/src/parse/mq.c
+++ b/src/parse/mq.c
@@ -7,7 +7,443 @@
/* https://drafts.csswg.org/mediaqueries/ */
+#include <libcss/fpmath.h>
+
+#include "bytecode/bytecode.h"
#include "parse/mq.h"
+#include "parse/properties/utils.h"
+#include "utils/utils.h"
+
+static css_error mq_parse_ratio(css_language *c,
+ const parserutils_vector *vector, int *ctx,
+ const css_token *numerator, css_fixed *ratio)
+{
+ const css_token *token;
+ css_fixed num, den;
+ size_t num_len, den_len;
+
+ /* NUMBER ws* '/' ws* NUMBER */
+
+ /* numerator, ws* already consumed */
+
+ token = parserutils_vector_iterate(vector, ctx);
+ if (token == NULL || tokenIsChar(token, '/') == false) {
+ return CSS_INVALID;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ token = parserutils_vector_iterate(vector, ctx);
+ if (token == NULL || token->type != CSS_TOKEN_NUMBER) {
+ return CSS_INVALID;
+ }
+
+ num = css__number_from_lwc_string(numerator->idata, true, &num_len);
+ den = css__number_from_lwc_string(token->idata, true, &den_len);
+
+ *ratio = css_divide_fixed(num, den);
+
+ return CSS_OK;
+}
+
+static css_error mq_create_feature(
+ lwc_string *name,
+ css_mq_feature **feature)
+{
+ css_mq_feature *f;
+
+ f = malloc(sizeof(*f));
+ if (f == NULL) {
+ return CSS_NOMEM;
+ }
+
+ memset(f, 0, sizeof(*f));
+
+ f->name = lwc_string_ref(name);
+
+ *feature = f;
+
+ return CSS_OK;
+}
+
+static css_error mq_populate_value(css_mq_value *value,
+ const css_token *token)
+{
+ if (token->type == CSS_TOKEN_NUMBER) {
+ size_t num_len;
+ value->type = CSS_MQ_VALUE_TYPE_NUM;
+ value->data.num_or_ratio = css__number_from_lwc_string(
+ token->idata, false, &num_len);
+ } else if (token->type == CSS_TOKEN_DIMENSION) {
+ size_t len = lwc_string_length(token->idata);
+ const char *data = lwc_string_data(token->idata);
+ uint32_t unit = UNIT_PX;
+ size_t consumed;
+
+ value->type == CSS_MQ_VALUE_TYPE_DIM;
+ value->data.dim.len = css__number_from_lwc_string(
+ token->idata, false, &consumed);
+ error = css__parse_unit_keyword(data + consumed, len - consumed,
+ &unit);
+ if (error != CSS_OK) {
+ return error;
+ }
+ value->data.dim.unit = temp_unit;
+ } else if (token->type == CSS_TOKEN_IDENT) {
+ value->type = CSS_MQ_VALUE_TYPE_IDENT;
+ value->data.ident = lwc_string_ref(token->idata);
+ }
+
+ return CSS_OK;
+}
+
+static css_error mq_parse_op(const css_token *token,
+ css_mq_feature_op *op)
+{
+ size_t len;
+ const char *data;
+
+ if (token == NULL || token->type != CSS_TOKEN_CHAR)
+ return CSS_INVALID;
+
+ len = lwc_string_length(token->idata);
+ data = lwc_string_data(token->idata);
+
+ if (len == 2) {
+ if (strncasecmp(data, "<=", 2) == 0)
+ *op = CSS_MQ_FEATURE_OP_LTE;
+ else if (strncasecmp(data, ">=", 2) == 0)
+ *op = CSS_MQ_FEATURE_OP_GTE;
+ else
+ return CSS_INVALID;
+ } else if (len == 1) {
+ if (*data == '<')
+ *op = CSS_MQ_FEATURE_OP_LT;
+ else if (*data == '=')
+ *op = CSS_MQ_FEATURE_OP_EQ;
+ else if (*data == '>')
+ *op = CSS_MQ_FEATURE_OP_GT;
+ else
+ return CSS_INVALID;
+ } else {
+ return CSS_INVALID;
+ }
+
+ return CSS_OK;
+}
+
+static css_error mq_parse_range(css_language *c,
+ const parserutils_vector *vector, int *ctx,
+ const css_token *name_or_value,
+ css_mq_feature **feature)
+{
+ const css_token *token, *value_or_name, *name = NULL, *value2 = NULL;
+ css_mq_feature *result;
+ css_mq_feature_op op, op2;
+ css_fixed ratio, ratio2;
+ bool name_first = false, value_is_ratio = false, value2_is_ratio =
false, match;
+ css_error error;
+
+ /* <mf-range> = <mf-name> [ '<' | '>' ]? '='? <mf-value>
+ * | <mf-value> [ '<' | '>' ]? '='? <mf-name>
+ * | <mf-value> '<' '='? <mf-name> '<' '='? <mf-value>
+ * | <mf-value> '>' '='? <mf-name> '>' '='? <mf-value>
+ */
+
+ if (name_or_value == NULL || (name_or_value->type != CSS_TOKEN_NUMBER &&
+ name_or_value->type != CSS_TOKEN_DIMENSION &&
+ name_or_value->type != CSS_TOKEN_IDENT)) {
+ return CSS_INVALID;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ /* Name-or-value */
+ if (name_or_value->type == CSS_TOKEN_NUMBER &&
+ tokenIsChar(parserutils_vector_peek(vector, *ctx),
'/')) {
+ /* ratio */
+ error = mq_parse_ratio(c, vector, ctx, token, &ratio);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ value_is_ratio = true;
+ } else if (name_or_value->type == CSS_TOKEN_IDENT &&
+ lwc_string_caseless_isequal(name_or_value->idata,
+ c->strings[INFINITE], &match) == lwc_error_ok
&&
+ match == false) {
+ /* The only ident permitted for mf-value is 'infinite', thus
must have name */
+ name = name_or_value;
+ name_first = true;
+ }
+
+ /* Op */
+ token = parserutils_vector_iterate(vector, ctx);
+ error = mq_parse_op(token, &op);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ /* Value-or-name */
+ value_or_name = parserutils_vector_iterate(vector, ctx);
+ if (value_or_name == NULL || (value_or_name->type != CSS_TOKEN_NUMBER &&
+ value_or_name->type != CSS_TOKEN_DIMENSION &&
+ value_or_name->type != CSS_TOKEN_IDENT)) {
+ return CSS_INVALID;
+ }
+
+ if (name == NULL) {
+ if (value_or_name->type != CSS_TOKEN_IDENT) {
+ return CSS_INVALID;
+ } else {
+ name = value_or_name;
+ }
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ if (value_or_name->type == CSS_TOKEN_NUMBER &&
+ tokenIsChar(parserutils_vector_peek(vector, *ctx),
'/')) {
+ /* ratio */
+ error = mq_parse_ratio(c, vector, ctx, token, &ratio);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ value_is_ratio = true;
+ }
+
+ token = parserutils_vector_peek(vector, *ctx);
+ if (name_first == false && token != NULL && tokenIsChar(token, ')') ==
false) {
+ /* Op2 */
+ token = parserutils_vector_iterate(vector, ctx);
+ error = mq_parse_op(token, &op2);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ /* Validate operators: must both be LT(E) or GT(E) */
+ if (op == CSS_MQ_FEATURE_OP_LT || op == CSS_MQ_FEATURE_OP_LTE) {
+ if (op2 != CSS_MQ_FEATURE_OP_LT && op2 !=
CSS_MQ_FEATURE_OP_LTE) {
+ return CSS_INVALID;
+ }
+ } else if (op == CSS_MQ_FEATURE_OP_GT || op ==
CSS_MQ_FEATURE_OP_GTE) {
+ if (op2 != CSS_MQ_FEATURE_OP_GT && op2 !=
CSS_MQ_FEATURE_OP_GTE) {
+ return CSS_INVALID;
+ }
+ } else {
+ return CSS_INVALID;
+ }
+
+ /* Value2 */
+ value2 = parserutils_vector_iterate(vector, ctx);
+ if (value2 == NULL || (value2->type != CSS_TOKEN_NUMBER &&
+ value2->type != CSS_TOKEN_DIMENSION &&
+ value2->type != CSS_TOKEN_IDENT)) {
+ return CSS_INVALID;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ if (value_or_name->type == CSS_TOKEN_NUMBER &&
+ tokenIsChar(parserutils_vector_peek(vector,
*ctx), '/')) {
+ /* ratio */
+ error = mq_parse_ratio(c, vector, ctx, token, &ratio2);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ value2_is_ratio = true;
+ }
+ }
+
+ error = mq_create_feature(name->idata, &result);
+ if (error != CSS_OK) {
+ return error;
+ }
+ if (name_first) {
+ /* Invert operator */
+ if (op == CSS_MQ_FEATURE_OP_LT) {
+ op = CSS_MQ_FEATURE_OP_GTE;
+ } else if (op == CSS_MQ_FEATURE_OP_LTE) {
+ op = CSS_MQ_FEATURE_OP_GT;
+ } else if (op == CSS_MQ_FEATURE_OP_GT) {
+ op = CSS_MQ_FEATURE_OP_LTE;
+ } else if (op == CSS_MQ_FEATURE_OP_GTE) {
+ op = CSS_MQ_FEATURE_OP_LT;
+ }
+ }
+ result->op = op;
+ if (value_is_ratio) {
+ result->value.type = CSS_MQ_VALUE_TYPE_RATIO;
+ result->value.data.num_or_ratio = ratio;
+ } else {
+ /* num/dim/ident */
+ error = mq_populate_value(&result->value, token);
+ if (error != CSS_OK) {
+ free(result);
+ return error;
+ }
+ }
+ if (value2 != NULL) {
+ result->op2 = op2;
+ if (value2_is_ratio) {
+ result->value2.type = CSS_MQ_VALUE_TYPE_RATIO;
+ result->value2.data.num_or_ratio = ratio;
+ } else {
+ /* num/dim/ident */
+ error = mq_populate_value(&result->value2, token);
+ if (error != CSS_OK) {
+ /* TODO: clean up result properly? */
+ free(result);
+ return error;
+ }
+ }
+ }
+
+ *feature = result;
+
+ return CSS_OK;
+}
+
+static css_error mq_parse_media_feature(css_language *c,
+ const parserutils_vector *vector, int *ctx,
+ css_mq_feature **feature)
+{
+ const css_token *name_or_value, *token;
+ css_mq_feature *result;
+ css_error error;
+
+ /* <media-feature> = ( [ <mf-plain> | <mf-boolean> | <mf-range> ] )
+ * <mf-plain> = <mf-name> : <mf-value>
+ * <mf-boolean> = <mf-name>
+ * <mf-name> = <ident>
+ * <mf-value> = <number> | <dimension> | <ident> | <ratio>
+ */
+
+ /* ( already consumed */
+
+ name_or_value = parserutils_vector_iterate(vector, ctx);
+ if (name_or_value == NULL)
+ return CSS_INVALID;
+
+ if (name_or_value->type == CSS_TOKEN_IDENT) {
+ consumeWhitespace(vector, ctx);
+
+ token = parserutils_vector_peek(vector, *ctx);
+ if (tokenIsChar(token, ')')) {
+ /* mf-boolean */
+ error = mq_create_feature(name_or_value->idata,
&result);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ result->op = CSS_MQ_FEATURE_OP_BOOL;
+ } else if (tokenIsChar(token, ':')) {
+ /* mf-plain */
+ parserutils_vector_iterate(vector, ctx);
+
+ consumeWhitespace(vector, ctx);
+
+ token = parserutils_vector_iterate(vector, ctx);
+ if (token == NULL || (token->type != CSS_TOKEN_NUMBER &&
+ token->type != CSS_TOKEN_DIMENSION &&
+ token->type != CSS_TOKEN_IDENT)) {
+ return CSS_INVALID;
+ }
+
+ consumeWhitespace(vector, ctx);
+
+ error = mq_create_feature(name_or_value->idata,
&result);
+ if (error != CSS_OK) {
+ return error;
+ }
+ result->op = CSS_MQ_FEATURE_OP_EQ;
+
+ if (token->type == CSS_TOKEN_NUMBER &&
+
tokenIsChar(parserutils_vector_peek(vector, *ctx), '/')) {
+ /* ratio */
+ css_fixed ratio;
+
+ error = mq_parse_ratio(c, vector, ctx, token,
&ratio);
+ if (error != CSS_OK) {
+ free(result);
+ return error;
+ }
+
+ result->value.type = CSS_MQ_VALUE_TYPE_RATIO;
+ result->value.data.num_or_ratio = ratio;
+ } else {
+ /* num/dim/ident */
+ error = mq_populate_value(&result->value,
token);
+ if (error != CSS_OK) {
+ free(result);
+ return error;
+ }
+ }
+
+ consumeWhitespace(vector, ctx);
+ } else {
+ /* mf-range */
+ error = mq_parse_range(c, vector, ctx, name_or_value,
&result);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+ }
+ } else {
+ /* mf-range */
+ error = mq_parse_range(c, vector, ctx, name_or_value, &result);
+ if (error != CSS_OK) {
+ return error;
+ }
+
+ consumeWhitespace(vector, ctx);
+ }
+
+ token = parserutils_vector_iterate(vector, ctx);
+ if (tokenIsChar(token, ')') == false) {
+ /* TODO: clean up result */
+ return CSS_INVALID;
+ }
+
+ *feature = result;
+
+ return CSS_OK;
+}
+
+static css_error mq_parse_media_in_parens()
+{
+ /* <media-in-parens> = ( <media-condition> ) | <media-feature> |
<general-enclosed>
+ * <general-enclosed> = [ <function-token> <any-value> ) ] | ( <ident>
<any-value> )
+ */
+
+ //LPAREN -> condition-or-feature
+ // "not" or LPAREN -> condition
+ // IDENT | NUMBER | DIMENSION | RATIO -> feature
+
+}
+
+static css_error mq_parse_condition()
+{
+ /* <media-condition> = <media-not> | <media-in-parens> [ <media-and>* |
<media-or>* ]
+ * <media-condition-without-or> = <media-not> | <media-in-parens>
<media-and>*
+ * <media-not> = not <media-in-parens>
+ * <media-and> = and <media-in-parens>
+ * <media-or> = or <media-in-parens>
+ */
+}
css_error css__mq_parse_media_list(css_language *c,
const parserutils_vector *vector, int *ctx,
@@ -16,7 +452,19 @@ css_error css__mq_parse_media_list(css_language *c,
css_mq_query *ret = NULL;
const css_token *token;
- /* (IDENT ws (',' ws IDENT ws)* )? */
+ /* <media-query-list> = <media-query> [ COMMA <media-query> ]*
+ * <media-query> = <media-condition>
+ * | [ not | only ]? <media-type> [ and
<media-condition-without-or> ]?
+ * <media-type> = <ident> (except "not", "and", "or", "only")
+ *
+ */
+
+ /* if {[(, push }]) to stack
+ * if func, push ) to stack
+ * on error, scan forward until stack is empty (or EOF), popping
matching tokens off stack
+ * if stack is empty, the next input token must be comma or EOF
+ * if comma, consume, and start again from the next input token
+ */
UNUSED(c);
diff --git a/src/parse/mq.h b/src/parse/mq.h
index 7d62e8c..c5268c7 100644
--- a/src/parse/mq.h
+++ b/src/parse/mq.h
@@ -22,7 +22,7 @@ typedef struct {
css_fixed num_or_ratio; /* Where ratio is the result of a/b */
struct {
css_fixed len;
- css_unit unit;
+ uint32_t unit;
} dim;
lwc_string *ident;
} data;
@@ -31,8 +31,8 @@ typedef struct {
/*
* "name : value" is encoded as "name = value"
* "name" is encoded by setting the operator to "bool"
- * "name op value" is encoded verbatim (with op2 set to "unused")
- * "value op name" inverts the operator to encode (i.e < becomes >=) (and sets
op2 to "unused")
+ * "value op name" is encoded verbatim (with op2 set to "unused")
+ * "name op value" inverts the operator to encode (i.e < becomes >=) (and sets
op2 to "unused")
* "value op name op value" is encoded using op2 and value2
*/
typedef enum {
diff --git a/src/parse/properties/utils.c b/src/parse/properties/utils.c
index 82dacf8..97583c6 100644
--- a/src/parse/properties/utils.c
+++ b/src/parse/properties/utils.c
@@ -1007,6 +1007,16 @@ css_error css__parse_unit_keyword(const char *ptr,
size_t len, uint32_t *unit)
if (len == 4) {
if (strncasecmp(ptr, "grad", 4) == 0)
*unit = UNIT_GRAD;
+ else if (strncasecmp(ptr, "turn", 4) == 0)
+ *unit = UNIT_TURN;
+ else if (strncasecmp(ptr, "dppx", 4) == 0)
+ *unit = UNIT_DPPX;
+ else if (strncasecmp(ptr, "dpcm", 4) == 0)
+ *unit = UNIT_DPCM;
+ else if (strncasecmp(ptr, "vmin", 4) == 0)
+ *unit = UNIT_VMIN;
+ else if (strncasecmp(ptr, "vmax", 4) == 0)
+ *unit = UNIT_VMAX;
else
return CSS_INVALID;
} else if (len == 3) {
@@ -1016,6 +1026,12 @@ css_error css__parse_unit_keyword(const char *ptr,
size_t len, uint32_t *unit)
*unit = UNIT_DEG;
else if (strncasecmp(ptr, "rad", 3) == 0)
*unit = UNIT_RAD;
+ else if (strncasecmp(ptr, "dpi", 3) == 0)
+ *unit = UNIT_DPI;
+ else if (strncasecmp(ptr, "rlh", 3) == 0)
+ *unit = UNIT_RLH;
+ else if (strncasecmp(ptr, "rem", 3) == 0)
+ *unit = UNIT_REM;
else
return CSS_INVALID;
} else if (len == 2) {
@@ -1039,11 +1055,27 @@ css_error css__parse_unit_keyword(const char *ptr,
size_t len, uint32_t *unit)
*unit = UNIT_PT;
else if (strncasecmp(ptr, "pc", 2) == 0)
*unit = UNIT_PC;
+ else if (strncasecmp(ptr, "ch", 2) == 0)
+ *unit = UNIT_CH;
+ else if (strncasecmp(ptr, "ic", 2) == 0)
+ *unit = UNIT_IC;
+ else if (strncasecmp(ptr, "lh", 2) == 0)
+ *unit = UNIT_LH;
+ else if (strncasecmp(ptr, "vw", 2) == 0)
+ *unit = UNIT_VW;
+ else if (strncasecmp(ptr, "vh", 2) == 0)
+ *unit = UNIT_VH;
+ else if (strncasecmp(ptr, "vi", 2) == 0)
+ *unit = UNIT_VI;
+ else if (strncasecmp(ptr, "vb", 2) == 0)
+ *unit = UNIT_VB;
else
return CSS_INVALID;
} else if (len == 1) {
if (strncasecmp(ptr, "s", 1) == 0)
*unit = UNIT_S;
+ else if (strncasecmp(ptr, "Q", 1) == 0)
+ *unit = UNIT_Q;
else
return CSS_INVALID;
} else
--
Cascading Style Sheets library
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