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GtkTextView: Add fallback and letter-spacing support

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Add support for the Pango attributes controlling font fallback
and letter spacing to GtkTextTag.

https://bugzilla.gnome.org/show_bug.cgi?id=740954
This commit is contained in:
Matthias Clasen 2014-12-03 23:13:13 -05:00
parent d0b7ccc2c5
commit d184088cae
5 changed files with 107 additions and 3 deletions
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12
gtk/gtktextattributes.c
View File

@ -378,6 +378,12 @@ G_GNUC_END_IGNORE_DEPRECATIONS
if (tag->priv->language_set)
dest->language = vals->language;
if (tag->priv->fallback_set)
dest->no_fallback = vals->no_fallback;
if (tag->priv->letter_spacing_set)
dest->letter_spacing = vals->letter_spacing;
++n;
}
@ -404,7 +410,8 @@ _gtk_text_tag_affects_size (GtkTextTag *tag)
priv->tabs_set ||
priv->underline_set ||
priv->wrap_mode_set ||
priv->invisible_set;
priv->invisible_set ||
priv->letter_spacing_set;
}
gboolean
@ -417,5 +424,6 @@ _gtk_text_tag_affects_nonsize_appearance (GtkTextTag *tag)
priv->fg_color_set ||
priv->strikethrough_set ||
priv->bg_full_height_set ||
priv->pg_bg_color_set;
priv->pg_bg_color_set ||
priv->fallback_set;
}

6
gtk/gtktextattributes.h
View File

@ -210,11 +210,15 @@ struct _GtkTextAttributes
/* can edit this text */
guint editable : 1;
guint no_fallback: 1;
/*< private >*/
/* Paragraph background */
GdkRGBA *pg_bg_rgba;
guint padding[3];
gint letter_spacing;
guint padding[2];
};
GDK_AVAILABLE_IN_ALL

18
gtk/gtktextlayout.c
View File

@ -1578,6 +1578,24 @@ add_text_attrs (GtkTextLayout *layout,
attr->start_index = start;
attr->end_index = start + byte_count;
pango_attr_list_insert (attrs, attr);
}
if (style->no_fallback)
{
attr = pango_attr_fallback_new (!style->no_fallback);
attr->start_index = start;
attr->end_index = start + byte_count;
pango_attr_list_insert (attrs, attr);
}
if (style->letter_spacing != 0)
{
attr = pango_attr_letter_spacing_new (style->letter_spacing);
attr->start_index = start;
attr->end_index = start + byte_count;
pango_attr_list_insert (attrs, attr);
}
}

72
gtk/gtktexttag.c
View File

@ -129,6 +129,8 @@ enum {
PROP_PARAGRAPH_BACKGROUND,
PROP_PARAGRAPH_BACKGROUND_GDK,
PROP_PARAGRAPH_BACKGROUND_RGBA,
PROP_FALLBACK,
PROP_LETTER_SPACING,
/* Behavior args */
PROP_ACCUMULATIVE_MARGIN,
@ -160,6 +162,8 @@ enum {
PROP_TABS_SET,
PROP_INVISIBLE_SET,
PROP_PARAGRAPH_BACKGROUND_SET,
PROP_FALLBACK_SET,
PROP_LETTER_SPACING_SET,
LAST_ARG
};
@ -599,6 +603,38 @@ gtk_text_tag_class_init (GtkTextTagClass *klass)
GDK_TYPE_RGBA,
GTK_PARAM_READWRITE));
/**
* GtkTextTag:fallback:
*
* Whether font fallback is enabled.
*
* When set to %TRUE, other fonts will be substituted
* where the current font is missing glyphs.
*
* Since: 3.16
*/
g_object_class_install_property (object_class,
PROP_FALLBACK,
g_param_spec_boolean ("fallback",
P_("Fallback"),
P_("Whether font fallback is enabled."),
TRUE,
GTK_PARAM_READWRITE));
/**
* GtkTextTag:letter-spacing:
*
* Extra spacing between graphemes, in Pango units.
*
* Since: 3.16
*/
g_object_class_install_property (object_class,
PROP_LETTER_SPACING,
g_param_spec_int ("letter-spacing",
P_("Letter Spacing"),
P_("Extra spacing between graphemes"),
0, G_MAXINT, 0,
GTK_PARAM_READWRITE));
/**
* GtkTextTag:accumulative-margin:
*
@ -726,6 +762,14 @@ gtk_text_tag_class_init (GtkTextTagClass *klass)
P_("Paragraph background set"),
P_("Whether this tag affects the paragraph background color"));
ADD_SET_PROP ("fallback-set", PROP_FALLBACK_SET,
P_("Fallback set"),
P_("Whether this tag affects font fallback"));
ADD_SET_PROP ("letter-spacing-set", PROP_LETTER_SPACING_SET,
P_("Letter spacing set"),
P_("Whether this tag affects letter spacing"));
/**
* GtkTextTag::event:
* @tag: the #GtkTextTag on which the signal is emitted
@ -1450,6 +1494,18 @@ gtk_text_tag_set_property (GObject *object,
}
break;
case PROP_FALLBACK:
priv->fallback_set = TRUE;
priv->values->no_fallback = !g_value_get_boolean (value);
g_object_notify (object, "fallback-set");
break;
case PROP_LETTER_SPACING:
priv->letter_spacing_set = TRUE;
priv->values->letter_spacing = g_value_get_int (value);
g_object_notify (object, "letter-spacing-set");
break;
case PROP_ACCUMULATIVE_MARGIN:
priv->accumulative_margin = g_value_get_boolean (value);
g_object_notify (object, "accumulative-margin");
@ -1763,6 +1819,14 @@ gtk_text_tag_get_property (GObject *object,
g_value_set_boxed (value, priv->values->pg_bg_rgba);
break;
case PROP_FALLBACK:
g_value_set_boolean (value, !priv->values->no_fallback);
break;
case PROP_LETTER_SPACING:
g_value_set_int (value, priv->values->letter_spacing);
break;
case PROP_ACCUMULATIVE_MARGIN:
g_value_set_boolean (value, priv->accumulative_margin);
break;
@ -1861,6 +1925,14 @@ gtk_text_tag_get_property (GObject *object,
g_value_set_boolean (value, priv->pg_bg_color_set);
break;
case PROP_FALLBACK_SET:
g_value_set_boolean (value, priv->fallback_set);
break;
case PROP_LETTER_SPACING_SET:
g_value_set_boolean (value, priv->letter_spacing_set);
break;
case PROP_BACKGROUND:
case PROP_FOREGROUND:
case PROP_PARAGRAPH_BACKGROUND:

2
gtk/gtktexttagprivate.h
View File

@ -75,6 +75,8 @@ struct _GtkTextTagPrivate
guint editable_set : 1;
guint language_set : 1;
guint pg_bg_color_set : 1;
guint fallback_set : 1;
guint letter_spacing_set : 1;
/* Whether these margins accumulate or override */
guint accumulative_margin : 1;