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/* gedit-pango.c
*
* This file is a copy of libdazzle dzl-pango.c
*
* Copyright (C) 2014-2017 Christian Hergert <christian@hergert.me>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define G_LOG_DOMAIN "gedit-pango"
#include "config.h"
#include <gdk/gdk.h>
#include <glib/gstdio.h>
#include <math.h>
#include "gedit-pango.h"
#define FONT_FAMILY "font-family"
#define FONT_VARIANT "font-variant"
#define FONT_STRETCH "font-stretch"
#define FONT_WEIGHT "font-weight"
#define FONT_SIZE "font-size"
/**
* gedit_pango_font_description_to_css:
*
* This function will generate CSS suitable for Gtk's CSS engine
* based on the properties of the #PangoFontDescription.
*
* Returns: (transfer full): A newly allocated string containing the
* CSS describing the font description.
*/
gchar *
gedit_pango_font_description_to_css (const PangoFontDescription *font_desc)
{
PangoFontMask mask;
GString *str;
#define ADD_KEYVAL(key,fmt) \
g_string_append(str,key":"fmt";")
#define ADD_KEYVAL_PRINTF(key,fmt,...) \
g_string_append_printf(str,key":"fmt";", __VA_ARGS__)
g_return_val_if_fail (font_desc, NULL);
str = g_string_new (NULL);
mask = pango_font_description_get_set_fields (font_desc);
if ((mask & PANGO_FONT_MASK_FAMILY) != 0)
{
const gchar *family;
family = pango_font_description_get_family (font_desc);
ADD_KEYVAL_PRINTF (FONT_FAMILY, "\"%s\"", family);
}
if ((mask & PANGO_FONT_MASK_STYLE) != 0)
{
PangoVariant variant;
variant = pango_font_description_get_variant (font_desc);
switch (variant)
{
case PANGO_VARIANT_NORMAL:
ADD_KEYVAL (FONT_VARIANT, "normal");
break;
case PANGO_VARIANT_SMALL_CAPS:
ADD_KEYVAL (FONT_VARIANT, "small-caps");
break;
default:
break;
}
}
if ((mask & PANGO_FONT_MASK_WEIGHT))
{
gint weight;
weight = pango_font_description_get_weight (font_desc);
/*
* WORKAROUND:
*
* font-weight with numbers does not appear to be working as expected
* right now. So for the common (bold/normal), let's just use the string
* and let gtk warn for the other values, which shouldn't really be
* used for this.
*/
switch (weight)
{
case PANGO_WEIGHT_SEMILIGHT:
/*
* 350 is not actually a valid css font-weight, so we will just round
* up to 400.
*/
case PANGO_WEIGHT_NORMAL:
ADD_KEYVAL (FONT_WEIGHT, "normal");
break;
case PANGO_WEIGHT_BOLD:
ADD_KEYVAL (FONT_WEIGHT, "bold");
break;
case PANGO_WEIGHT_THIN:
case PANGO_WEIGHT_ULTRALIGHT:
case PANGO_WEIGHT_LIGHT:
case PANGO_WEIGHT_BOOK:
case PANGO_WEIGHT_MEDIUM:
case PANGO_WEIGHT_SEMIBOLD:
case PANGO_WEIGHT_ULTRABOLD:
case PANGO_WEIGHT_HEAVY:
case PANGO_WEIGHT_ULTRAHEAVY:
default:
/* round to nearest hundred */
weight = round (weight / 100.0) * 100;
ADD_KEYVAL_PRINTF ("font-weight", "%d", weight);
break;
}
}
#ifndef GDK_WINDOWING_QUARTZ
/*
* We seem to get "Condensed" for fonts on the Quartz backend,
* which is rather annoying as it results in us always hitting
* fallback (stretch) paths. So let's cheat and just disable
* stretch support for now on Quartz.
*/
if ((mask & PANGO_FONT_MASK_STRETCH))
{
switch (pango_font_description_get_stretch (font_desc))
{
case PANGO_STRETCH_ULTRA_CONDENSED:
ADD_KEYVAL (FONT_STRETCH, "untra-condensed");
break;
case PANGO_STRETCH_EXTRA_CONDENSED:
ADD_KEYVAL (FONT_STRETCH, "extra-condensed");
break;
case PANGO_STRETCH_CONDENSED:
ADD_KEYVAL (FONT_STRETCH, "condensed");
break;
case PANGO_STRETCH_SEMI_CONDENSED:
ADD_KEYVAL (FONT_STRETCH, "semi-condensed");
break;
case PANGO_STRETCH_NORMAL:
ADD_KEYVAL (FONT_STRETCH, "normal");
break;
case PANGO_STRETCH_SEMI_EXPANDED:
ADD_KEYVAL (FONT_STRETCH, "semi-expanded");
break;
case PANGO_STRETCH_EXPANDED:
ADD_KEYVAL (FONT_STRETCH, "expanded");
break;
case PANGO_STRETCH_EXTRA_EXPANDED:
ADD_KEYVAL (FONT_STRETCH, "extra-expanded");
break;
case PANGO_STRETCH_ULTRA_EXPANDED:
ADD_KEYVAL (FONT_STRETCH, "untra-expanded");
break;
default:
break;
}
}
#endif
if ((mask & PANGO_FONT_MASK_SIZE))
{
gint font_size;
font_size = pango_font_description_get_size (font_desc) / PANGO_SCALE;
ADD_KEYVAL_PRINTF ("font-size", "%dpt", font_size);
}
return g_string_free (str, FALSE);
#undef ADD_KEYVAL
#undef ADD_KEYVAL_PRINTF
}
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