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css: Implement text-transform

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Implement the text-transform property from
https://www.w3.org/TR/css-text-3/#text-transform-property
using a new Pango attribute.
This commit is contained in:
Matthias Clasen 2021-08-20 19:01:01 -04:00
parent 5ab9a29bc4
commit 2d84a1c63e
9 changed files with 118 additions and 0 deletions
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1
docs/reference/gtk/css-properties.md
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@ -162,6 +162,7 @@ done with
|caret-color|[CSS Basic User Interface Level 3](https://www.w3.org/TR/css3-ui/#caret-color) | CSS allows an auto value |
|-gtk-secondary-caret-color|[Color](https://www.w3.org/TR/css-color-3/#valuea-def-color) | used for the secondary caret in bidirectional text |
|letter-spacing| [CSS Text Level 3](https://www.w3.org/TR/css3-text/#letter-spacing) | |
|text-transform| [CSS Text Level 3](https://www.w3.org/TR/css-text-3/#text-transform-property) | CSS allows full-width and full-size-kana. Since 4.6 |
|line-height| [CSS Inline Layout Level 3](https://www.w3.org/TR/css-inline-3/#line-height-property) | Since 4.6 |
|text-decoration-line| [CSS Text Decoration Level 3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-line-property) | |
|text-decoration-color| [CSS Text Decoration Level 3](https://www.w3.org/TR/css-text-decor-3/#text-decoration-color-property) | |

4
gtk/gtkcssanimatedstyle.c
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@ -220,6 +220,10 @@ gtk_css_animated_style_set_animated_value (GtkCssAnimatedStyle *animated,
unshare_font_variant (animated);
gtk_css_take_value (&style->font_variant->text_decoration_style, value);
break;
case GTK_CSS_PROPERTY_TEXT_TRANSFORM:
unshare_font_variant (animated);
gtk_css_take_value (&style->font_variant->text_transform, value);
break;
case GTK_CSS_PROPERTY_FONT_KERNING:
unshare_font_variant (animated);
gtk_css_take_value (&style->font_variant->font_kerning, value);

52
gtk/gtkcssenumvalue.c
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@ -1568,3 +1568,55 @@ _gtk_css_font_variant_east_asian_value_get (const GtkCssValue *value)
return value->value;
}
/* GtkTextTransform */
static const GtkCssValueClass GTK_CSS_VALUE_TEXT_TRANSFORM = {
"GtkCssTextTransformValue",
gtk_css_value_enum_free,
gtk_css_value_enum_compute,
gtk_css_value_enum_equal,
gtk_css_value_enum_transition,
NULL,
NULL,
gtk_css_value_enum_print
};
static GtkCssValue text_transform_values[] = {
{ &GTK_CSS_VALUE_TEXT_TRANSFORM, 1, TRUE, GTK_CSS_TEXT_TRANSFORM_NONE, "none" },
{ &GTK_CSS_VALUE_TEXT_TRANSFORM, 1, TRUE, GTK_CSS_TEXT_TRANSFORM_LOWERCASE, "lowercase" },
{ &GTK_CSS_VALUE_TEXT_TRANSFORM, 1, TRUE, GTK_CSS_TEXT_TRANSFORM_UPPERCASE, "uppercase" },
{ &GTK_CSS_VALUE_TEXT_TRANSFORM, 1, TRUE, GTK_CSS_TEXT_TRANSFORM_CAPITALIZE, "capitalize" },
};
GtkCssValue *
_gtk_css_text_transform_value_new (GtkTextTransform transform)
{
g_return_val_if_fail (transform < G_N_ELEMENTS (text_transform_values), NULL);
return _gtk_css_value_ref (&text_transform_values[transform]);
}
GtkCssValue *
_gtk_css_text_transform_value_try_parse (GtkCssParser *parser)
{
guint i;
g_return_val_if_fail (parser != NULL, NULL);
for (i = 0; i < G_N_ELEMENTS (text_transform_values); i++)
{
if (gtk_css_parser_try_ident (parser, text_transform_values[i].name))
return _gtk_css_value_ref (&text_transform_values[i]);
}
return NULL;
}
GtkTextTransform
_gtk_css_text_transform_value_get (const GtkCssValue *value)
{
g_return_val_if_fail (value->class == &GTK_CSS_VALUE_TEXT_TRANSFORM, GTK_CSS_TEXT_TRANSFORM_NONE);
return value->value;
}

3
gtk/gtkcssenumvalueprivate.h
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@ -115,6 +115,9 @@ GtkCssFontVariantEastAsian _gtk_css_font_variant_east_asian_try_parse_one (GtkCs
GtkCssFontVariantEastAsian base);
GtkCssFontVariantEastAsian _gtk_css_font_variant_east_asian_value_get (const GtkCssValue *value);
GtkCssValue * _gtk_css_text_transform_value_new (GtkTextTransform transform);
GtkCssValue * _gtk_css_text_transform_value_try_parse (GtkCssParser *parser);
GtkTextTransform _gtk_css_text_transform_value_get (const GtkCssValue *value);
G_END_DECLS
#endif /* __GTK_CSS_ENUM_VALUE_PRIVATE_H__ */

5
gtk/gtkcssstaticstyle.c
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@ -118,6 +118,7 @@ static const int font_variant_props[] = {
GTK_CSS_PROPERTY_TEXT_DECORATION_LINE,
GTK_CSS_PROPERTY_TEXT_DECORATION_COLOR,
GTK_CSS_PROPERTY_TEXT_DECORATION_STYLE,
GTK_CSS_PROPERTY_TEXT_TRANSFORM,
GTK_CSS_PROPERTY_FONT_KERNING,
GTK_CSS_PROPERTY_FONT_VARIANT_LIGATURES,
GTK_CSS_PROPERTY_FONT_VARIANT_POSITION,
@ -430,6 +431,9 @@ gtk_css_static_style_set_value (GtkCssStaticStyle *sstyle,
case GTK_CSS_PROPERTY_TEXT_DECORATION_STYLE:
gtk_css_take_value (&style->font_variant->text_decoration_style, value);
break;
case GTK_CSS_PROPERTY_TEXT_TRANSFORM:
gtk_css_take_value (&style->font_variant->text_transform, value);
break;
case GTK_CSS_PROPERTY_FONT_KERNING:
gtk_css_take_value (&style->font_variant->font_kerning, value);
break;
@ -810,6 +814,7 @@ gtk_css_font_variant_create_initial_values (void)
values->text_decoration_line = _gtk_css_initial_value_new_compute (GTK_CSS_PROPERTY_TEXT_DECORATION_LINE, NULL, NULL, NULL);
values->text_decoration_color = NULL;
values->text_decoration_style = _gtk_css_initial_value_new_compute (GTK_CSS_PROPERTY_TEXT_DECORATION_STYLE, NULL, NULL, NULL);
values->text_transform = _gtk_css_initial_value_new_compute (GTK_CSS_PROPERTY_TEXT_TRANSFORM, NULL, NULL, NULL);
values->font_kerning = _gtk_css_initial_value_new_compute (GTK_CSS_PROPERTY_FONT_KERNING, NULL, NULL, NULL);
values->font_variant_ligatures = _gtk_css_initial_value_new_compute (GTK_CSS_PROPERTY_FONT_VARIANT_LIGATURES, NULL, NULL, NULL);
values->font_variant_position = _gtk_css_initial_value_new_compute (GTK_CSS_PROPERTY_FONT_VARIANT_POSITION, NULL, NULL, NULL);

26
gtk/gtkcssstyle.c
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@ -126,6 +126,8 @@ gtk_css_style_get_value (GtkCssStyle *style,
return style->font_variant->text_decoration_color ? style->font_variant->text_decoration_color : style->core->color;
case GTK_CSS_PROPERTY_TEXT_DECORATION_STYLE:
return style->font_variant->text_decoration_style;
case GTK_CSS_PROPERTY_TEXT_TRANSFORM:
return style->font_variant->text_transform;
case GTK_CSS_PROPERTY_FONT_KERNING:
return style->font_variant->font_kerning;
case GTK_CSS_PROPERTY_FONT_VARIANT_LIGATURES:
@ -400,6 +402,24 @@ get_pango_underline_from_style (GtkTextDecorationStyle style)
g_return_val_if_reached (PANGO_UNDERLINE_SINGLE);
}
static PangoTextTransform
get_pango_text_transform_from_style (GtkTextTransform transform)
{
switch (transform)
{
case GTK_CSS_TEXT_TRANSFORM_NONE:
return PANGO_TEXT_TRANSFORM_NONE;
case GTK_CSS_TEXT_TRANSFORM_LOWERCASE:
return PANGO_TEXT_TRANSFORM_LOWERCASE;
case GTK_CSS_TEXT_TRANSFORM_UPPERCASE:
return PANGO_TEXT_TRANSFORM_UPPERCASE;
case GTK_CSS_TEXT_TRANSFORM_CAPITALIZE:
return PANGO_TEXT_TRANSFORM_CAPITALIZE;
default:
return PANGO_TEXT_TRANSFORM_NONE;
}
}
static PangoOverline
get_pango_overline_from_style (GtkTextDecorationStyle style)
{
@ -445,6 +465,7 @@ gtk_css_style_get_pango_attributes (GtkCssStyle *style)
GtkCssFontVariantEastAsian east_asian;
GString *s;
char *settings;
GtkTextTransform transform;
/* text-decoration */
decoration_line = _gtk_css_text_decoration_line_value_get (style->font_variant->text_decoration_line);
@ -655,6 +676,11 @@ gtk_css_style_get_pango_attributes (GtkCssStyle *style)
g_string_free (s, TRUE);
}
transform = _gtk_css_text_transform_value_get (style->font_variant->text_transform);
if (transform != GTK_CSS_TEXT_TRANSFORM_NONE)
attrs = add_pango_attr (attrs, pango_attr_text_transform_new (get_pango_text_transform_from_style (transform)));
return attrs;
}

1
gtk/gtkcssstyleprivate.h
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@ -159,6 +159,7 @@ struct _GtkCssFontVariantValues {
GtkCssValue *text_decoration_line;
GtkCssValue *text_decoration_color; // NULL if currentColor
GtkCssValue *text_decoration_style;
GtkCssValue *text_transform;
GtkCssValue *font_kerning;
GtkCssValue *font_variant_ligatures;
GtkCssValue *font_variant_position;

18
gtk/gtkcssstylepropertyimpl.c
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@ -366,6 +366,18 @@ parse_text_decoration_style (GtkCssStyleProperty *property,
return value;
}
static GtkCssValue *
parse_text_transform (GtkCssStyleProperty *property,
GtkCssParser *parser)
{
GtkCssValue *value = _gtk_css_text_transform_value_try_parse (parser);
if (value == NULL)
gtk_css_parser_error_syntax (parser, "unknown text transform value");
return value;
}
static GtkCssValue *
parse_font_kerning (GtkCssStyleProperty *property,
GtkCssParser *parser)
@ -917,6 +929,12 @@ _gtk_css_style_property_init_properties (void)
GTK_CSS_AFFECTS_TEXT_ATTRS,
parse_text_decoration_style,
_gtk_css_text_decoration_style_value_new (GTK_CSS_TEXT_DECORATION_STYLE_SOLID));
gtk_css_style_property_register ("text-transform",
GTK_CSS_PROPERTY_TEXT_TRANSFORM,
0,
GTK_CSS_AFFECTS_TEXT_ATTRS | GTK_CSS_AFFECTS_TEXT_SIZE,
parse_text_transform,
_gtk_css_text_transform_value_new (GTK_CSS_TEXT_TRANSFORM_NONE));
gtk_css_style_property_register ("font-kerning",
GTK_CSS_PROPERTY_FONT_KERNING,
0,

8
gtk/gtkcsstypesprivate.h
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@ -198,6 +198,7 @@ enum { /*< skip >*/
GTK_CSS_PROPERTY_TEXT_DECORATION_LINE,
GTK_CSS_PROPERTY_TEXT_DECORATION_COLOR,
GTK_CSS_PROPERTY_TEXT_DECORATION_STYLE,
GTK_CSS_PROPERTY_TEXT_TRANSFORM,
GTK_CSS_PROPERTY_FONT_KERNING,
GTK_CSS_PROPERTY_FONT_VARIANT_LIGATURES,
GTK_CSS_PROPERTY_FONT_VARIANT_POSITION,
@ -338,6 +339,13 @@ typedef enum /*< skip >*/ {
GTK_CSS_TEXT_DECORATION_STYLE_WAVY
} GtkTextDecorationStyle;
typedef enum /*< skip >*/ {
GTK_CSS_TEXT_TRANSFORM_NONE,
GTK_CSS_TEXT_TRANSFORM_LOWERCASE,
GTK_CSS_TEXT_TRANSFORM_UPPERCASE,
GTK_CSS_TEXT_TRANSFORM_CAPITALIZE,
} GtkTextTransform;
/* for the order in arrays */
typedef enum /*< skip >*/ {
GTK_CSS_TOP,