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css: Implement font-stretch

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The font-stretch CSS property is defined in the Level 3 CSS Fonts
module, available at:

  http://dev.w3.org/csswg/css-fonts/#propdef-font-stretch

It allows defining a normal, condensed, or expanded face to the font
description. Pango already supports it, so this is literally just the
CSS parser machinery needed to bridge our CSS to the FontDescription
API.

https://bugzilla.gnome.org/show_bug.cgi?id=735593
This commit is contained in:
Emmanuele Bassi 2014-08-28 12:50:49 +01:00
parent f05e9d2612
commit 5ad60caa3c
13 changed files with 139 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
gtk/gtkcssenumvalue.c
View File

@ -436,6 +436,60 @@ _gtk_css_font_weight_value_get (const GtkCssValue *value)
return value->value;
}
/* PangoStretch */
static const GtkCssValueClass GTK_CSS_VALUE_FONT_STRETCH = {
gtk_css_value_enum_free,
gtk_css_value_enum_compute,
gtk_css_value_enum_equal,
gtk_css_value_enum_transition,
gtk_css_value_enum_print
};
static GtkCssValue font_stretch_values[] = {
{ &GTK_CSS_VALUE_FONT_STRETCH, 1, PANGO_STRETCH_ULTRA_CONDENSED, "ultra-condensed" },
{ &GTK_CSS_VALUE_FONT_STRETCH, 1, PANGO_STRETCH_EXTRA_CONDENSED, "extra-condensed" },
{ &GTK_CSS_VALUE_FONT_STRETCH, 1, PANGO_STRETCH_CONDENSED, "condensed" },
{ &GTK_CSS_VALUE_FONT_STRETCH, 1, PANGO_STRETCH_SEMI_CONDENSED, "semi-condensed" },
{ &GTK_CSS_VALUE_FONT_STRETCH, 1, PANGO_STRETCH_NORMAL, "normal" },
{ &GTK_CSS_VALUE_FONT_STRETCH, 1, PANGO_STRETCH_SEMI_EXPANDED, "semi-expanded" },
{ &GTK_CSS_VALUE_FONT_STRETCH, 1, PANGO_STRETCH_EXPANDED, "expanded" },
{ &GTK_CSS_VALUE_FONT_STRETCH, 1, PANGO_STRETCH_EXTRA_EXPANDED, "extra-expanded" },
{ &GTK_CSS_VALUE_FONT_STRETCH, 1, PANGO_STRETCH_ULTRA_EXPANDED, "ultra-expanded" },
};
GtkCssValue *
_gtk_css_font_stretch_value_new (PangoStretch font_stretch)
{
g_return_val_if_fail (font_stretch < G_N_ELEMENTS (font_stretch_values), NULL);
return _gtk_css_value_ref (&font_stretch_values[font_stretch]);
}
GtkCssValue *
_gtk_css_font_stretch_value_try_parse (GtkCssParser *parser)
{
guint i;
g_return_val_if_fail (parser != NULL, NULL);
for (i = 0; i < G_N_ELEMENTS (font_stretch_values); i++)
{
if (_gtk_css_parser_try (parser, font_stretch_values[i].name, TRUE))
return _gtk_css_value_ref (&font_stretch_values[i]);
}
return NULL;
}
PangoStretch
_gtk_css_font_stretch_value_get (const GtkCssValue *value)
{
g_return_val_if_fail (value->class == &GTK_CSS_VALUE_FONT_STRETCH, PANGO_STRETCH_NORMAL);
return value->value;
}
/* GtkCssArea */
static const GtkCssValueClass GTK_CSS_VALUE_AREA = {

4
gtk/gtkcssenumvalueprivate.h
View File

@ -48,6 +48,10 @@ GtkCssValue * _gtk_css_font_weight_value_new (PangoWeight weight
GtkCssValue * _gtk_css_font_weight_value_try_parse (GtkCssParser *parser);
PangoWeight _gtk_css_font_weight_value_get (const GtkCssValue *value);
GtkCssValue * _gtk_css_font_stretch_value_new (PangoStretch stretch);
GtkCssValue * _gtk_css_font_stretch_value_try_parse (GtkCssParser *parser);
PangoStretch _gtk_css_font_stretch_value_get (const GtkCssValue *value);
GtkCssValue * _gtk_css_area_value_new (GtkCssArea area);
GtkCssValue * _gtk_css_area_value_try_parse (GtkCssParser *parser);
GtkCssArea _gtk_css_area_value_get (const GtkCssValue *value);

18
gtk/gtkcssprovider.c
View File

@ -766,7 +766,23 @@
* font-size: 12px;
* ]|
*
* ## font: [family] [style] [variant] [size];
* ## font-stretch: [face]
*
* Selects a normal, condensed, or expanded face from a font family.
*
* Absolute keyword values have the following ordering, from narrowest to widest:
*
* - ultra-condensed
* - extra-condensed
* - condensed
* - semi-condensed
* - normal
* - semi-expanded
* - expanded
* - extra-expanded
* - ultra-expanded
*
* ## font: [family] [style] [variant] [stretch] [size];
*
* A shorthand for setting a few font properties at once.
* - Supports any format accepted by pango_font_description_from_string()

22
gtk/gtkcssshorthandpropertyimpl.c
View File

@ -453,9 +453,13 @@ parse_font (GtkCssShorthandProperty *shorthand,
{
values[3] = _gtk_css_font_weight_value_new (pango_font_description_get_weight (desc));
}
if (mask & PANGO_FONT_MASK_STRETCH)
{
values[4] = _gtk_css_font_stretch_value_new (pango_font_description_get_stretch (desc));
}
if (mask & PANGO_FONT_MASK_SIZE)
{
values[4] = _gtk_css_number_value_new ((double) pango_font_description_get_size (desc) / PANGO_SCALE, GTK_CSS_PX);
values[5] = _gtk_css_number_value_new ((double) pango_font_description_get_size (desc) / PANGO_SCALE, GTK_CSS_PX);
}
pango_font_description_free (desc);
@ -996,6 +1000,16 @@ unpack_font_description (GtkCssShorthandProperty *shorthand,
g_value_unset (&v);
}
if (mask & PANGO_FONT_MASK_STRETCH)
{
g_value_init (&v, PANGO_TYPE_STRETCH);
g_value_set_enum (&v, pango_font_description_get_stretch (description));
prop = _gtk_style_property_lookup ("font-stretch");
_gtk_style_property_assign (prop, props, state, &v);
g_value_unset (&v);
}
if (mask & PANGO_FONT_MASK_SIZE)
{
g_value_init (&v, G_TYPE_DOUBLE);
@ -1041,6 +1055,10 @@ pack_font_description (GtkCssShorthandProperty *shorthand,
if (v)
pango_font_description_set_weight (description, _gtk_css_font_weight_value_get (v));
v = (* query_func) (_gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (_gtk_style_property_lookup ("font-stretch"))), query_data);
if (v)
pango_font_description_set_stretch (description, _gtk_css_font_stretch_value_get (v));
g_value_init (value, PANGO_TYPE_FONT_DESCRIPTION);
g_value_take_boxed (value, description);
}
@ -1127,7 +1145,7 @@ void
_gtk_css_shorthand_property_init_properties (void)
{
/* The order is important here, be careful when changing it */
const char *font_subproperties[] = { "font-family", "font-style", "font-variant", "font-weight", "font-size", NULL };
const char *font_subproperties[] = { "font-family", "font-style", "font-variant", "font-weight", "font-stretch", "font-size", NULL };
const char *margin_subproperties[] = { "margin-top", "margin-right", "margin-bottom", "margin-left", NULL };
const char *padding_subproperties[] = { "padding-top", "padding-right", "padding-bottom", "padding-left", NULL };
const char *border_width_subproperties[] = { "border-top-width", "border-right-width", "border-bottom-width", "border-left-width", NULL };

36
gtk/gtkcssstylepropertyimpl.c
View File

@ -357,6 +357,34 @@ assign_pango_variant (GtkCssStyleProperty *property,
return _gtk_css_font_variant_value_new (g_value_get_enum (value));
}
static GtkCssValue *
parse_pango_stretch (GtkCssStyleProperty *property,
GtkCssParser *parser)
{
GtkCssValue *value = _gtk_css_font_stretch_value_try_parse (parser);
if (value == NULL)
_gtk_css_parser_error (parser, "unknown value for property");
return value;
}
static void
query_pango_stretch (GtkCssStyleProperty *property,
const GtkCssValue *css_value,
GValue *value)
{
g_value_init (value, PANGO_TYPE_STRETCH);
g_value_set_enum (value, _gtk_css_font_stretch_value_get (css_value));
}
static GtkCssValue *
assign_pango_stretch (GtkCssStyleProperty *property,
const GValue *value)
{
return _gtk_css_font_stretch_value_new (g_value_get_enum (value));
}
static GtkCssValue *
parse_border_style (GtkCssStyleProperty *property,
GtkCssParser *parser)
@ -976,6 +1004,14 @@ _gtk_css_style_property_init_properties (void)
query_pango_weight,
assign_pango_weight,
_gtk_css_font_weight_value_new (PANGO_WEIGHT_NORMAL));
gtk_css_style_property_register ("font-stretch",
GTK_CSS_PROPERTY_FONT_STRETCH,
PANGO_TYPE_STRETCH,
GTK_STYLE_PROPERTY_INHERIT | GTK_STYLE_PROPERTY_AFFECTS_FONT,
parse_pango_stretch,
query_pango_stretch,
assign_pango_stretch,
_gtk_css_font_stretch_value_new (PANGO_STRETCH_NORMAL));
gtk_css_style_property_register ("text-shadow",
GTK_CSS_PROPERTY_TEXT_SHADOW,

1
gtk/gtkcsstypesprivate.h
View File

@ -78,6 +78,7 @@ enum { /*< skip >*/
GTK_CSS_PROPERTY_FONT_STYLE,
GTK_CSS_PROPERTY_FONT_VARIANT,
GTK_CSS_PROPERTY_FONT_WEIGHT,
GTK_CSS_PROPERTY_FONT_STRETCH,
GTK_CSS_PROPERTY_TEXT_SHADOW,
GTK_CSS_PROPERTY_ICON_SOURCE,
GTK_CSS_PROPERTY_ICON_SHADOW,

1
testsuite/css/parser/declarations-valid-02.ref.css
View File

@ -1,6 +1,7 @@
* {
font-family: "Sans";
font-size: 15px;
font-stretch: normal;
font-style: normal;
font-variant: normal;
font-weight: normal;

1
testsuite/css/parser/declarations-valid-03.ref.css
View File

@ -1,6 +1,7 @@
* {
font-family: "Sans";
font-size: 15px;
font-stretch: normal;
font-style: normal;
font-variant: normal;
font-weight: normal;

1
testsuite/css/parser/declarations-valid-04.ref.css
View File

@ -1,6 +1,7 @@
* {
font-family: initial;
font-size: initial;
font-stretch: normal;
font-style: normal;
font-variant: normal;
font-weight: bold;

1
testsuite/css/parser/declarations-valid-08.ref.css
View File

@ -1,6 +1,7 @@
* {
font-family: "Sans";
font-size: 15px;
font-stretch: normal;
font-style: normal;
font-variant: normal;
font-weight: normal;

1
testsuite/css/parser/value-inherit-shorthand.ref.css
View File

@ -17,6 +17,7 @@
border-top-width: inherit;
font-family: inherit;
font-size: inherit;
font-stretch: inherit;
font-style: inherit;
font-variant: inherit;
font-weight: inherit;

1
testsuite/css/parser/value-inherit.css
View File

@ -29,6 +29,7 @@
engine: inherit;
font-family: inherit;
font-size: inherit;
font-stretch: inherit;
font-style: inherit;
font-variant: inherit;
font-weight: inherit;

1
testsuite/css/parser/value-initial-shorthand.ref.css
View File

@ -17,6 +17,7 @@
border-top-width: initial;
font-family: initial;
font-size: initial;
font-stretch: initial;
font-style: initial;
font-variant: initial;
font-weight: initial;