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-rw-r--r--src/select/unit.c67
1 files changed, 40 insertions, 27 deletions
diff --git a/src/select/unit.c b/src/select/unit.c
index f9ecf83..a279ec7 100644
--- a/src/select/unit.c
+++ b/src/select/unit.c
@@ -115,14 +115,15 @@ static inline css_fixed css_unit__absolute_len2pt(
}
}
-/* Exported function, documented in unit.h. */
+/* Exported function, documented in libcss/unit.h. */
css_fixed css_unit_font_size_len2pt(
+ const css_computed_style *style,
const css_unit_len_ctx *ctx,
const css_fixed length,
const css_unit unit)
{
return css_unit__absolute_len2pt(
- ctx->ref_style,
+ style,
ctx->viewport_height,
ctx->viewport_width,
length,
@@ -303,15 +304,16 @@ css_fixed css_unit_len2px_mq(
return FMUL(length, TRUNCATEFIX(px_per_unit));
}
-/* Exported function, documented in unit.h. */
+/* Exported function, documented in libcss/unit.h. */
css_fixed css_unit_len2css_px(
+ const css_computed_style *style,
const css_unit_len_ctx *ctx,
const css_fixed length,
const css_unit unit)
{
css_fixed px_per_unit = css_unit__px_per_unit(
ctx->measure,
- ctx->ref_style,
+ style,
ctx->root_style,
ctx->font_size_default,
ctx->font_size_minimum,
@@ -328,15 +330,16 @@ css_fixed css_unit_len2css_px(
return FMUL(length, TRUNCATEFIX(px_per_unit));
}
-/* Exported function, documented in unit.h. */
+/* Exported function, documented in libcss/unit.h. */
css_fixed css_unit_len2device_px(
+ const css_computed_style *style,
const css_unit_len_ctx *ctx,
const css_fixed length,
const css_unit unit)
{
css_fixed px_per_unit = css_unit__px_per_unit(
ctx->measure,
- ctx->ref_style,
+ style,
ctx->root_style,
ctx->font_size_default,
ctx->font_size_minimum,
@@ -361,18 +364,18 @@ css_fixed css_unit_len2device_px(
* The computed style will have font-size with an absolute unit.
* If no computed style is given, the client default font-size will be returned.
*
- * \param[in] ctx Length unit conversion context.
- * \param[in] style The style to get the font-size for, or NULL.
+ * \param[in] style Reference style. (Element or parent, or NULL).
+ * \param[in] font_size_default Client default font size in CSS pixels.
* \return The font size in absolute units.
*/
static inline css_hint_length css_unit__get_font_size(
- const css_unit_len_ctx *ctx,
- const css_computed_style *style)
+ const css_computed_style *style,
+ css_fixed font_size_default)
{
css_hint_length size;
if (style == NULL) {
- size.value = ctx->font_size_default;
+ size.value = font_size_default;
size.unit = CSS_UNIT_PX;
} else {
enum css_font_size_e status = get_font_size(
@@ -391,10 +394,24 @@ static inline css_hint_length css_unit__get_font_size(
/* Exported function, documented in unit.h. */
css_error css_unit_compute_absolute_font_size(
- const css_unit_len_ctx *ctx,
+ const css_hint_length *ref_length,
+ const css_computed_style *root_style,
+ css_fixed font_size_default,
css_hint *size)
{
- css_hint_length ref_len;
+ css_hint_length ref_len = {
+ .value = font_size_default,
+ .unit = CSS_UNIT_PX,
+ };
+
+ if (ref_length != NULL) {
+ /* Must be absolute. */
+ assert(ref_length->unit != CSS_UNIT_EM);
+ assert(ref_length->unit != CSS_UNIT_EX);
+ assert(ref_length->unit != CSS_UNIT_PCT);
+
+ ref_len = *ref_length;
+ }
assert(size->status != CSS_FONT_SIZE_INHERIT);
@@ -420,20 +437,18 @@ css_error css_unit_compute_absolute_font_size(
assert(CSS_FONT_SIZE_XX_SMALL == 1);
size->data.length.value = FMUL(factors[size->status - 1],
- ctx->font_size_default);
+ font_size_default);
size->data.length.unit = CSS_UNIT_PX;
size->status = CSS_FONT_SIZE_DIMENSION;
break;
}
case CSS_FONT_SIZE_LARGER:
- ref_len = css_unit__get_font_size(ctx, ctx->ref_style);
size->data.length.value = FMUL(ref_len.value, FLTTOFIX(1.2));
size->data.length.unit = ref_len.unit;
size->status = CSS_FONT_SIZE_DIMENSION;
break;
case CSS_FONT_SIZE_SMALLER:
- ref_len = css_unit__get_font_size(ctx, ctx->ref_style);
size->data.length.value = FDIV(ref_len.value, FLTTOFIX(1.2));
size->data.length.unit = ref_len.unit;
size->status = CSS_FONT_SIZE_DIMENSION;
@@ -443,9 +458,8 @@ css_error css_unit_compute_absolute_font_size(
/* Convert any relative units to absolute. */
switch (size->data.length.unit) {
case CSS_UNIT_PCT:
- ref_len = css_unit__get_font_size(ctx, ctx->ref_style);
- size->data.length.value = FDIV(
- FMUL(size->data.length.value,
+ size->data.length.value = FDIV(FMUL(
+ size->data.length.value,
ref_len.value), INTTOFIX(100));
size->data.length.unit = ref_len.unit;
break;
@@ -454,11 +468,8 @@ css_error css_unit_compute_absolute_font_size(
case CSS_UNIT_EX: /* Fall-through */
case CSS_UNIT_CH:
/* Parent relative units. */
- ref_len = css_unit__get_font_size(ctx, ctx->ref_style);
-
- size->data.length.unit = ref_len.unit;
- size->data.length.value = FMUL(size->data.length.value,
- ref_len.value);
+ size->data.length.value = FMUL(
+ size->data.length.value, ref_len.value);
switch (size->data.length.unit) {
case CSS_UNIT_EX:
@@ -476,15 +487,17 @@ css_error css_unit_compute_absolute_font_size(
default:
break;
}
+ size->data.length.unit = ref_len.unit;
break;
case CSS_UNIT_REM:
/* Root element relative units. */
- ref_len = css_unit__get_font_size(ctx, ctx->root_style);
+ ref_len = css_unit__get_font_size(root_style,
+ font_size_default);
size->data.length.unit = ref_len.unit;
- size->data.length.value = FMUL(size->data.length.value,
- ref_len.value);
+ size->data.length.value = FMUL(
+ size->data.length.value, ref_len.value);
break;
default:
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-06 11:23:34 +0000