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cssstyle: Only create PangoAttrList if there are attribtues

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Don't allocate a new GString if we never need it and therefore don't
create the PangoAttrList if we have no attributes anyway. Update callers
to handle the possible NULL return value.
This commit is contained in:
Timm Bäder 2020-04-12 09:22:38 +02:00
parent 2e14ea84f3
commit 584a71ae96
2 changed files with 70 additions and 59 deletions
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95
gtk/gtkcssstyle.c
View File

@ -412,11 +412,16 @@ add_pango_attr (PangoAttrList *attrs,
}
static void
append_separated (GString *s, const char *text)
append_separated (GString **s,
const char *text)
{
if (s->len > 0)
g_string_append (s, ", ");
g_string_append (s, text);
if (G_UNLIKELY (!*s))
*s = g_string_new (NULL);
if ((*s)->len > 0)
g_string_append (*s, ", ");
g_string_append (*s, text);
}
PangoAttrList *
@ -472,15 +477,15 @@ gtk_css_style_get_pango_attributes (GtkCssStyle *style)
/* OpenType features */
s = g_string_new ("");
s = NULL;
switch (_gtk_css_font_kerning_value_get (style->font_variant->font_kerning))
{
case GTK_CSS_FONT_KERNING_NORMAL:
append_separated (s, "kern 1");
append_separated (&s, "kern 1");
break;
case GTK_CSS_FONT_KERNING_NONE:
append_separated (s, "kern 0");
append_separated (&s, "kern 0");
break;
case GTK_CSS_FONT_KERNING_AUTO:
default:
@ -493,34 +498,34 @@ gtk_css_style_get_pango_attributes (GtkCssStyle *style)
/* all defaults */
}
else if (ligatures == GTK_CSS_FONT_VARIANT_LIGATURE_NONE)
append_separated (s, "liga 0, clig 0, dlig 0, hlig 0, calt 0");
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");
append_separated (&s, "liga 1, clig 1");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_NO_COMMON_LIGATURES)
append_separated (s, "liga 0, clig 0");
append_separated (&s, "liga 0, clig 0");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_DISCRETIONARY_LIGATURES)
append_separated (s, "dlig 1");
append_separated (&s, "dlig 1");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_NO_DISCRETIONARY_LIGATURES)
append_separated (s, "dlig 0");
append_separated (&s, "dlig 0");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_HISTORICAL_LIGATURES)
append_separated (s, "hlig 1");
append_separated (&s, "hlig 1");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_NO_HISTORICAL_LIGATURES)
append_separated (s, "hlig 0");
append_separated (&s, "hlig 0");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_CONTEXTUAL)
append_separated (s, "calt 1");
append_separated (&s, "calt 1");
if (ligatures & GTK_CSS_FONT_VARIANT_LIGATURE_NO_CONTEXTUAL)
append_separated (s, "calt 0");
append_separated (&s, "calt 0");
}
switch (_gtk_css_font_variant_position_value_get (style->font_variant->font_variant_position))
{
case GTK_CSS_FONT_VARIANT_POSITION_SUB:
append_separated (s, "subs 1");
append_separated (&s, "subs 1");
break;
case GTK_CSS_FONT_VARIANT_POSITION_SUPER:
append_separated (s, "sups 1");
append_separated (&s, "sups 1");
break;
case GTK_CSS_FONT_VARIANT_POSITION_NORMAL:
default:
@ -530,22 +535,22 @@ gtk_css_style_get_pango_attributes (GtkCssStyle *style)
switch (_gtk_css_font_variant_caps_value_get (style->font_variant->font_variant_caps))
{
case GTK_CSS_FONT_VARIANT_CAPS_SMALL_CAPS:
append_separated (s, "smcp 1");
append_separated (&s, "smcp 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_ALL_SMALL_CAPS:
append_separated (s, "c2sc 1, smcp 1");
append_separated (&s, "c2sc 1, smcp 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_PETITE_CAPS:
append_separated (s, "pcap 1");
append_separated (&s, "pcap 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_ALL_PETITE_CAPS:
append_separated (s, "c2pc 1, pcap 1");
append_separated (&s, "c2pc 1, pcap 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_UNICASE:
append_separated (s, "unic 1");
append_separated (&s, "unic 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_TITLING_CAPS:
append_separated (s, "titl 1");
append_separated (&s, "titl 1");
break;
case GTK_CSS_FONT_VARIANT_CAPS_NORMAL:
default:
@ -560,27 +565,27 @@ gtk_css_style_get_pango_attributes (GtkCssStyle *style)
else
{
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_LINING_NUMS)
append_separated (s, "lnum 1");
append_separated (&s, "lnum 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_OLDSTYLE_NUMS)
append_separated (s, "onum 1");
append_separated (&s, "onum 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_PROPORTIONAL_NUMS)
append_separated (s, "pnum 1");
append_separated (&s, "pnum 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_TABULAR_NUMS)
append_separated (s, "tnum 1");
append_separated (&s, "tnum 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_DIAGONAL_FRACTIONS)
append_separated (s, "frac 1");
append_separated (&s, "frac 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_STACKED_FRACTIONS)
append_separated (s, "afrc 1");
append_separated (&s, "afrc 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_ORDINAL)
append_separated (s, "ordn 1");
append_separated (&s, "ordn 1");
if (numeric & GTK_CSS_FONT_VARIANT_NUMERIC_SLASHED_ZERO)
append_separated (s, "zero 1");
append_separated (&s, "zero 1");
}
switch (_gtk_css_font_variant_alternate_value_get (style->font_variant->font_variant_alternates))
{
case GTK_CSS_FONT_VARIANT_ALTERNATE_HISTORICAL_FORMS:
append_separated (s, "hist 1");
append_separated (&s, "hist 1");
break;
case GTK_CSS_FONT_VARIANT_ALTERNATE_NORMAL:
default:
@ -595,34 +600,37 @@ gtk_css_style_get_pango_attributes (GtkCssStyle *style)
else
{
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_JIS78)
append_separated (s, "jp78 1");
append_separated (&s, "jp78 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_JIS83)
append_separated (s, "jp83 1");
append_separated (&s, "jp83 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_JIS90)
append_separated (s, "jp90 1");
append_separated (&s, "jp90 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_JIS04)
append_separated (s, "jp04 1");
append_separated (&s, "jp04 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_SIMPLIFIED)
append_separated (s, "smpl 1");
append_separated (&s, "smpl 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_TRADITIONAL)
append_separated (s, "trad 1");
append_separated (&s, "trad 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_FULL_WIDTH)
append_separated (s, "fwid 1");
append_separated (&s, "fwid 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_PROPORTIONAL)
append_separated (s, "pwid 1");
append_separated (&s, "pwid 1");
if (east_asian & GTK_CSS_FONT_VARIANT_EAST_ASIAN_RUBY)
append_separated (s, "ruby 1");
append_separated (&s, "ruby 1");
}
settings = gtk_css_font_features_value_get_features (style->font->font_feature_settings);
if (settings)
{
append_separated (s, settings);
append_separated (&s, settings);
g_free (settings);
}
if (s)
{
attrs = add_pango_attr (attrs, pango_attr_font_features_new (s->str));
g_string_free (s, TRUE);
}
return attrs;
}
@ -672,6 +680,7 @@ gtk_css_style_get_pango_font (GtkCssStyle *style)
v = style->font->font_variation_settings;
str = gtk_css_font_variations_value_get_variations (v);
if (str)
pango_font_description_set_variations (description, str);
g_free (str);

14
gtk/gtklabel.c
View File

@ -2998,13 +2998,13 @@ gtk_label_update_layout_attributes (GtkLabel *label)
const GdkRGBA *link_color;
PangoAttrList *link_attrs;
PangoAttribute *attr;
GSList *attributes;
GSList *l;
style = gtk_css_node_get_style (link->cssnode);
link_attrs = gtk_css_style_get_pango_attributes (style);
attributes = pango_attr_list_get_attributes (link_attrs);
if (link_attrs)
{
GSList *attributes = pango_attr_list_get_attributes (link_attrs);
GSList *l;
for (l = attributes; l; l = l->next)
{
attr = l->data;
@ -3013,8 +3013,8 @@ gtk_label_update_layout_attributes (GtkLabel *label)
attr->end_index = link->end;
pango_attr_list_insert (attrs, attr);
}
g_slist_free (attributes);
}
link_color = gtk_css_color_value_get_rgba (style->core->color);
attr = pango_attr_foreground_new (link_color->red * 65535,
@ -3034,9 +3034,11 @@ gtk_label_update_layout_attributes (GtkLabel *label)
style = gtk_css_node_get_style (gtk_widget_get_css_node (widget));
style_attrs = gtk_css_style_get_pango_attributes (style);
attrs = _gtk_pango_attr_list_merge (attrs, style_attrs);
if (style_attrs)
{
attrs = _gtk_pango_attr_list_merge (attrs, style_attrs);
pango_attr_list_unref (style_attrs);
}
attrs = _gtk_pango_attr_list_merge (attrs, priv->markup_attrs);
attrs = _gtk_pango_attr_list_merge (attrs, priv->attrs);