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gtk2/gtk/gtkcssstyle.c
Matthias Clasen 6859f0a6d1 css: Use enums instead of idents for font-variant properties 
As Benjamin says, ident should only be used if any value
is valid, which is not the case here. So use enums instead,
which should also be more efficient. To handle the more
complicated cases like font-variant-ligatures, we have to
introduce flags-like values.
2017-09-18 23:22:38 -04:00

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/*
* Copyright © 2012 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkprivate.h"
#include "gtkcssstyleprivate.h"
#include "gtkcssanimationprivate.h"
#include "gtkcssarrayvalueprivate.h"
#include "gtkcssenumvalueprivate.h"
#include "gtkcssinheritvalueprivate.h"
#include "gtkcssinitialvalueprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkcssrgbavalueprivate.h"
#include "gtkcsssectionprivate.h"
#include "gtkcssshorthandpropertyprivate.h"
#include "gtkcssstringvalueprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkcsstransitionprivate.h"
#include "gtkstyleanimationprivate.h"
#include "gtkstylepropertyprivate.h"
#include "gtkstyleproviderprivate.h"
G_DEFINE_ABSTRACT_TYPE (GtkCssStyle, gtk_css_style, G_TYPE_OBJECT)
static GtkCssSection *
gtk_css_style_real_get_section (GtkCssStyle *style,
guint id)
{
return NULL;
}
static gboolean
gtk_css_style_real_is_static (GtkCssStyle *style)
{
return TRUE;
}
static void
gtk_css_style_class_init (GtkCssStyleClass *klass)
{
klass->get_section = gtk_css_style_real_get_section;
klass->is_static = gtk_css_style_real_is_static;
}
static void
gtk_css_style_init (GtkCssStyle *style)
{
}
GtkCssValue *
gtk_css_style_get_value (GtkCssStyle *style,
guint id)
{
return GTK_CSS_STYLE_GET_CLASS (style)->get_value (style, id);
}
GtkCssSection *
gtk_css_style_get_section (GtkCssStyle *style,
guint id)
{
gtk_internal_return_val_if_fail (GTK_IS_CSS_STYLE (style), NULL);
return GTK_CSS_STYLE_GET_CLASS (style)->get_section (style, id);
}
GtkBitmask *
gtk_css_style_add_difference (GtkBitmask *accumulated,
GtkCssStyle *style,
GtkCssStyle *other)
{
gint len, i;
if (style == other)
return accumulated;
len = _gtk_css_style_property_get_n_properties ();
for (i = 0; i < len; i++)
{
if (_gtk_bitmask_get (accumulated, i))
continue;
if (!_gtk_css_value_equal (gtk_css_style_get_value (style, i),
gtk_css_style_get_value (other, i)))
accumulated = _gtk_bitmask_set (accumulated, i, TRUE);
}
return accumulated;
}
gboolean
gtk_css_style_is_static (GtkCssStyle *style)
{
gtk_internal_return_val_if_fail (GTK_IS_CSS_STYLE (style), TRUE);
return GTK_CSS_STYLE_GET_CLASS (style)->is_static (style);
}
/*
* gtk_css_style_print:
* @style: a #GtkCssStyle
* @string: the #GString to print to
* @indent: level of indentation to use
* @skip_initial: %TRUE to skip properties that have their initial value
*
* Print the @style to @string, in CSS format. Every property is printed
* on a line by itself, indented by @indent spaces. If @skip_initial is
* %TRUE, properties are only printed if their value in @style is different
* from the initial value of the property.
*
* Returns: %TRUE is any properties have been printed
*/
gboolean
gtk_css_style_print (GtkCssStyle *style,
GString *string,
guint indent,
gboolean skip_initial)
{
guint i;
gboolean retval = FALSE;
g_return_val_if_fail (GTK_IS_CSS_STYLE (style), FALSE);
g_return_val_if_fail (string != NULL, FALSE);
for (i = 0; i < _gtk_css_style_property_get_n_properties (); i++)
{
GtkCssSection *section;
GtkCssStyleProperty *prop;
GtkCssValue *value;
const char *name;
section = gtk_css_style_get_section (style, i);
if (!section && skip_initial)
continue;
prop = _gtk_css_style_property_lookup_by_id (i);
name = _gtk_style_property_get_name (GTK_STYLE_PROPERTY (prop));
value = gtk_css_style_get_value (style, i);
g_string_append_printf (string, "%*s%s: ", indent, "", name);
_gtk_css_value_print (value, string);
g_string_append_c (string, ';');
if (section)
{
g_string_append (string, " /* ");
_gtk_css_section_print (section, string);
g_string_append (string, " */");
}
g_string_append_c (string, '\n');
retval = TRUE;
}
return retval;
}
char *
gtk_css_style_to_string (GtkCssStyle *style)
{
GString *string;
g_return_val_if_fail (GTK_IS_CSS_STYLE (style), NULL);
string = g_string_new ("");
gtk_css_style_print (style, string, 0, FALSE);
return g_string_free (string, FALSE);
}
static PangoUnderline
get_pango_underline_from_style (GtkTextDecorationStyle style)
{
switch (style)
{
case GTK_CSS_TEXT_DECORATION_STYLE_DOUBLE:
return PANGO_UNDERLINE_DOUBLE;
case GTK_CSS_TEXT_DECORATION_STYLE_WAVY:
return PANGO_UNDERLINE_ERROR;
case GTK_CSS_TEXT_DECORATION_STYLE_SOLID:
default:
return PANGO_UNDERLINE_SINGLE;
}
g_return_val_if_reached (PANGO_UNDERLINE_SINGLE);
}
static PangoAttrList *
add_pango_attr (PangoAttrList *attrs,
PangoAttribute *attr)
{
if (attrs == NULL)
attrs = pango_attr_list_new ();
pango_attr_list_insert (attrs, attr);
return attrs;
}
static void
append_separated (GString *s, const char *text)
{
if (s->len > 0)
g_string_append (s, ", ");
g_string_append (s, text);
}
PangoAttrList *
gtk_css_style_get_pango_attributes (GtkCssStyle *style)
{
PangoAttrList *attrs = NULL;
GtkTextDecorationLine decoration_line;
GtkTextDecorationStyle decoration_style;
const GdkRGBA *color;
const GdkRGBA *decoration_color;
gint letter_spacing;
GtkCssValue *value;
GtkCssFontVariantLigature ligatures;
GtkCssFontVariantNumeric numeric;
GtkCssFontVariantEastAsian east_asian;
GString *s;
/* text-decoration */
decoration_line = _gtk_css_text_decoration_line_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_TEXT_DECORATION_LINE));
decoration_style = _gtk_css_text_decoration_style_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_TEXT_DECORATION_STYLE));
color = _gtk_css_rgba_value_get_rgba (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_COLOR));
decoration_color = _gtk_css_rgba_value_get_rgba (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_TEXT_DECORATION_COLOR));
switch (decoration_line)
{
case GTK_CSS_TEXT_DECORATION_LINE_UNDERLINE:
attrs = add_pango_attr (attrs, pango_attr_underline_new (get_pango_underline_from_style (decoration_style)));
if (!gdk_rgba_equal (color, decoration_color))
attrs = add_pango_attr (attrs, pango_attr_underline_color_new (decoration_color->red * 65535. + 0.5,
decoration_color->green * 65535. + 0.5,
decoration_color->blue * 65535. + 0.5));
break;
case GTK_CSS_TEXT_DECORATION_LINE_LINE_THROUGH:
attrs = add_pango_attr (attrs, pango_attr_strikethrough_new (TRUE));
if (!gdk_rgba_equal (color, decoration_color))
attrs = add_pango_attr (attrs, pango_attr_strikethrough_color_new (decoration_color->red * 65535. + 0.5,
decoration_color->green * 65535. + 0.5,
decoration_color->blue * 65535. + 0.5));
break;
case GTK_CSS_TEXT_DECORATION_LINE_NONE:
default:
break;
}
/* letter-spacing */
letter_spacing = _gtk_css_number_value_get (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_LETTER_SPACING), 100);
if (letter_spacing != 0)
{
attrs = add_pango_attr (attrs, pango_attr_letter_spacing_new (letter_spacing * PANGO_SCALE));
}
/* OpenType features */
s = g_string_new ("");
value = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_FONT_KERNING);
switch (_gtk_css_font_kerning_value_get (value))
{
case GTK_CSS_FONT_KERNING_NORMAL:
append_separated (s, "kern 1");
break;
case GTK_CSS_FONT_KERNING_NONE:
append_separated (s, "kern 0");
break;
default: ;
}
value = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_FONT_VARIANT_LIGATURES);
ligatures = _gtk_css_font_variant_ligature_value_get (value);
if (ligatures == GTK_CSS_FONT_VARIANT_LIGATURE_NORMAL)
{
/* all defaults */
}
else if (ligatures == GTK_CSS_FONT_VARIANT_LIGATURE_NONE)
append_separated (s, "liga 0, clig 0, dlig 0, hlig 0, calt 0");
else
{
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_COMMON_LIGATURES)
append_separated (s, "liga 1, clig 1");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_NO_COMMON_LIGATURES)
append_separated (s, "liga 0, clig 0");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_DISCRETIONARY_LIGATURES)
append_separated (s, "dlig 1");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_NO_DISCRETIONARY_LIGATURES)
append_separated (s, "dlig 0");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_HISTORICAL_LIGATURES)
append_separated (s, "hlig 1");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_NO_HISTORICAL_LIGATURES)
append_separated (s, "hlig 0");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_CONTEXTUAL)
append_separated (s, "calt 1");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_NO_CONTEXTUAL)
append_separated (s, "calt 0");
}
value = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_FONT_VARIANT_POSITION);
switch (_gtk_css_font_variant_position_value_get (value))
{
case GTK_CSS_FONT_VARIANT_POSITION_SUB:
append_separated (s, "subs 1");
break;
case GTK_CSS_FONT_VARIANT_POSITION_SUPER:
append_separated (s, "sups 1");
break;
default: ;
}
value = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_FONT_VARIANT_CAPS);
switch (_gtk_css_font_variant_caps_value_get (value))
{
case GTK_CSS_FONT_VARIANT_CAPS_SMALL_CAPS:
append_separated (s, "smcp 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_ALL_SMALL_CAPS:
append_separated (s, "c2sc 1, smcp 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_PETITE_CAPS:
append_separated (s, "pcap 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_ALL_PETITE_CAPS:
append_separated (s, "c2pc 1, pcap 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_UNICASE:
append_separated (s, "unic 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_TITLING_CAPS:
append_separated (s, "titl 1");
break;
default: ;
}
value = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_FONT_VARIANT_NUMERIC);
numeric = _gtk_css_font_variant_numeric_value_get (value);
if (numeric == GTK_CSS_FONT_VARIANT_NUMERIC_NORMAL)
{
/* all defaults */
}
else
{
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_LINING_NUMS)
append_separated (s, "lnum 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_OLDSTYLE_NUMS)
append_separated (s, "onum 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_PROPORTIONAL_NUMS)
append_separated (s, "pnum 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_TABULAR_NUMS)
append_separated (s, "tnum 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_DIAGONAL_FRACTIONS)
append_separated (s, "frac 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_STACKED_FRACTIONS)
append_separated (s, "afrc 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_ORDINAL)
append_separated (s, "ordn 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_SLASHED_ZERO)
append_separated (s, "zero 1");
}
value = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_FONT_VARIANT_ALTERNATES);
switch (_gtk_css_font_variant_alternate_value_get (value))
{
case GTK_CSS_FONT_VARIANT_ALTERNATE_HISTORICAL_FORMS:
append_separated (s, "hist 1");
break;
default: ;
}
value = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_FONT_VARIANT_EAST_ASIAN);
east_asian = _gtk_css_font_variant_east_asian_value_get (value);
if (east_asian == GTK_CSS_FONT_VARIANT_EAST_ASIAN_NORMAL)
{
/* all defaults */
}
else
{
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_JIS78)
append_separated (s, "jp78 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_JIS83)
append_separated (s, "jp83 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_JIS90)
append_separated (s, "jp90 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_JIS04)
append_separated (s, "jp04 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_SIMPLIFIED)
append_separated (s, "smpl 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_TRADITIONAL)
append_separated (s, "trad 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_FULL_WIDTH)
append_separated (s, "fwid 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_PROPORTIONAL)
append_separated (s, "pwid 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_RUBY)
append_separated (s, "ruby 1");
}
attrs = add_pango_attr (attrs, pango_attr_font_features_new (s->str));
g_string_free (s, TRUE);
return attrs;
}
static GtkCssValue *
query_func (guint id,
gpointer values)
{
return gtk_css_style_get_value (values, id);
}
PangoFontDescription *
gtk_css_style_get_pango_font (GtkCssStyle *style)
{
GtkStyleProperty *prop;
GValue value = { 0, };
prop = _gtk_style_property_lookup ("font");
_gtk_style_property_query (prop, &value, query_func, style);
return (PangoFontDescription *)g_value_get_boxed (&value);
}
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