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-rw-r--r--src/select/mq.h180
1 files changed, 141 insertions, 39 deletions
diff --git a/src/select/mq.h b/src/select/mq.h
index 1c07ecc..f51d0db 100644
--- a/src/select/mq.h
+++ b/src/select/mq.h
@@ -9,32 +9,133 @@
#ifndef css_select_mq_h_
#define css_select_mq_h_
+static inline css_fixed css_len2px(
+ css_fixed length,
+ css_unit unit,
+ const css_media *media)
+{
+ css_fixed px_per_unit;
+
+ switch (unit) {
+ case CSS_UNIT_VI:
+ /* TODO: Assumes writing mode. */
+ unit = CSS_UNIT_VW;
+ break;
+ case CSS_UNIT_VB:
+ /* TODO: Assumes writing mode. */
+ unit = CSS_UNIT_VH;
+ break;
+ case CSS_UNIT_VMIN:
+ unit = (media->height < media->width) ?
+ CSS_UNIT_VH : CSS_UNIT_VW;
+ break;
+ case CSS_UNIT_VMAX:
+ unit = (media->width > media->height) ?
+ CSS_UNIT_VH : CSS_UNIT_VW;
+ break;
+ default:
+ break;
+ }
+
+ switch (unit) {
+ case CSS_UNIT_EM:
+ case CSS_UNIT_EX:
+ case CSS_UNIT_CAP:
+ case CSS_UNIT_CH:
+ case CSS_UNIT_IC:
+ {
+ px_per_unit = FDIV(FMUL(media->client_font_size, F_96), F_72);
+
+ /* TODO: Handling these as fixed ratios of CSS_UNIT_EM. */
+ switch (unit) {
+ case CSS_UNIT_EX:
+ px_per_unit = FMUL(px_per_unit, FLTTOFIX(0.6));
+ break;
+ case CSS_UNIT_CAP:
+ px_per_unit = FMUL(px_per_unit, FLTTOFIX(0.9));
+ break;
+ case CSS_UNIT_CH:
+ px_per_unit = FMUL(px_per_unit, FLTTOFIX(0.4));
+ break;
+ case CSS_UNIT_IC:
+ px_per_unit = FMUL(px_per_unit, FLTTOFIX(1.1));
+ break;
+ default:
+ break;
+ }
+ }
+ break;
+ case CSS_UNIT_PX:
+ return length;
+ case CSS_UNIT_IN:
+ px_per_unit = F_96;
+ break;
+ case CSS_UNIT_CM:
+ px_per_unit = FDIV(F_96, FLTTOFIX(2.54));
+ break;
+ case CSS_UNIT_MM:
+ px_per_unit = FDIV(F_96, FLTTOFIX(25.4));
+ break;
+ case CSS_UNIT_Q:
+ px_per_unit = FDIV(F_96, FLTTOFIX(101.6));
+ break;
+ case CSS_UNIT_PT:
+ px_per_unit = FDIV(F_96, F_72);
+ break;
+ case CSS_UNIT_PC:
+ px_per_unit = FDIV(F_96, INTTOFIX(6));
+ break;
+ case CSS_UNIT_REM:
+ px_per_unit = FDIV(FMUL(media->client_font_size, F_96), F_72);
+ break;
+ case CSS_UNIT_RLH:
+ px_per_unit = media->client_line_height;
+ break;
+ case CSS_UNIT_VH:
+ px_per_unit = FDIV(media->height, F_100);
+ break;
+ case CSS_UNIT_VW:
+ px_per_unit = FDIV(media->width, F_100);
+ break;
+ default:
+ px_per_unit = 0;
+ break;
+ }
+
+ /* Ensure we round px_per_unit to the nearest whole number of pixels:
+ * the use of FIXTOINT() below will truncate. */
+ px_per_unit += F_0_5;
+
+ /* Calculate total number of pixels */
+ return FMUL(length, TRUNCATEFIX(px_per_unit));
+}
+
static inline bool mq_match_feature_range_length_op1(
css_mq_feature_op op,
const css_mq_value *value,
- const css_media_length *client_len)
+ const css_fixed client_len,
+ const css_media *media)
{
+ css_fixed v;
+
if (value->type != CSS_MQ_VALUE_TYPE_DIM) {
return false;
}
- /* TODO: convert to same units */
- if (value->data.dim.unit != client_len->unit) {
- return false;
+
+ if (value->data.dim.unit != CSS_UNIT_PX) {
+ v = css_len2px(value->data.dim.len,
+ value->data.dim.unit, media);
+ } else {
+ v = value->data.dim.len;
}
switch (op) {
- case CSS_MQ_FEATURE_OP_BOOL:
- return false;
- case CSS_MQ_FEATURE_OP_LT:
- return value->data.dim.len < client_len->value;
- case CSS_MQ_FEATURE_OP_LTE:
- return value->data.dim.len <= client_len->value;
- case CSS_MQ_FEATURE_OP_EQ:
- return value->data.dim.len == client_len->value;
- case CSS_MQ_FEATURE_OP_GTE:
- return value->data.dim.len >= client_len->value;
- case CSS_MQ_FEATURE_OP_GT:
- return value->data.dim.len > client_len->value;
+ case CSS_MQ_FEATURE_OP_BOOL: return false;
+ case CSS_MQ_FEATURE_OP_LT: return v < client_len;
+ case CSS_MQ_FEATURE_OP_LTE: return v <= client_len;
+ case CSS_MQ_FEATURE_OP_EQ: return v == client_len;
+ case CSS_MQ_FEATURE_OP_GTE: return v >= client_len;
+ case CSS_MQ_FEATURE_OP_GT: return v > client_len;
default:
return false;
}
@@ -43,30 +144,31 @@ static inline bool mq_match_feature_range_length_op1(
static inline bool mq_match_feature_range_length_op2(
css_mq_feature_op op,
const css_mq_value *value,
- const css_media_length *client_len)
+ const css_fixed client_len,
+ const css_media *media)
{
+ css_fixed v;
+
if (op == CSS_MQ_FEATURE_OP_UNUSED) {
return true;
}
if (value->type != CSS_MQ_VALUE_TYPE_DIM) {
return false;
}
- /* TODO: convert to same units */
- if (value->data.dim.unit != client_len->unit) {
- return false;
+
+ if (value->data.dim.unit != CSS_UNIT_PX) {
+ v = css_len2px(value->data.dim.len,
+ value->data.dim.unit, media);
+ } else {
+ v = value->data.dim.len;
}
switch (op) {
- case CSS_MQ_FEATURE_OP_LT:
- return client_len->value < value->data.dim.len;
- case CSS_MQ_FEATURE_OP_LTE:
- return client_len->value <= value->data.dim.len;
- case CSS_MQ_FEATURE_OP_EQ:
- return client_len->value == value->data.dim.len;
- case CSS_MQ_FEATURE_OP_GTE:
- return client_len->value >= value->data.dim.len;
- case CSS_MQ_FEATURE_OP_GT:
- return client_len->value > value->data.dim.len;
+ case CSS_MQ_FEATURE_OP_LT: return client_len < v;
+ case CSS_MQ_FEATURE_OP_LTE: return client_len <= v;
+ case CSS_MQ_FEATURE_OP_EQ: return client_len == v;
+ case CSS_MQ_FEATURE_OP_GTE: return client_len >= v;
+ case CSS_MQ_FEATURE_OP_GT: return client_len > v;
default:
return false;
}
@@ -75,7 +177,7 @@ static inline bool mq_match_feature_range_length_op2(
/**
* Match media query features.
*
- * \param[in] feat Condition to match.
+ * \param[in] feat Condition to match.
* \param[in] media Current media spec, to check against feat.
* \return true if condition matches, otherwise false.
*/
@@ -85,21 +187,21 @@ static inline bool mq_match_feature(
{
/* TODO: Use interned string for comparison. */
if (strcmp(lwc_string_data(feat->name), "width") == 0) {
- if (!mq_match_feature_range_length_op1(
- feat->op, &feat->value, &media->width)) {
+ if (!mq_match_feature_range_length_op1(feat->op, &feat->value,
+ media->width, media)) {
return false;
}
- return mq_match_feature_range_length_op2(
- feat->op2, &feat->value2, &media->width);
+ return mq_match_feature_range_length_op2(feat->op2,
+ &feat->value2, media->width, media);
} else if (strcmp(lwc_string_data(feat->name), "height") == 0) {
- if (!mq_match_feature_range_length_op1(
- feat->op, &feat->value, &media->height)) {
+ if (!mq_match_feature_range_length_op1(feat->op, &feat->value,
+ media->height, media)) {
return false;
}
- return mq_match_feature_range_length_op2(
- feat->op2, &feat->value2, &media->height);
+ return mq_match_feature_range_length_op2(feat->op2,
+ &feat->value2, media->height, media);
}
/* TODO: Look at other feature names. */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 13:55:26 +0000