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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Author:
* Felipe Corrêa da Silva Sanches <juca@members.fsf.org>
* Tavmjong Bah <tavmjong@free.fr>
*
* Copyright (C) 2018 Felipe Corrêa da Silva Sanches, Tavmong Bah
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <iostream>
#include <iomanip>
#include <gtkmm.h>
#include <glibmm/i18n.h>
#include <libnrtype/font-instance.h>
#include "font-variations.h"
// For updating from selection
#include "desktop.h"
#include "object/sp-text.h"
namespace Inkscape {
namespace UI {
namespace Widget {
FontVariationAxis::FontVariationAxis (Glib::ustring name, OTVarAxis& axis)
: name (name)
{
// std::cout << "FontVariationAxis::FontVariationAxis:: "
// << " name: " << name
// << " min: " << axis.minimum
// << " max: " << axis.maximum
// << " val: " << axis.set_val << std::endl;
label = Gtk::manage( new Gtk::Label( name ) );
add( *label );
precision = 2 - int( log10(axis.maximum - axis.minimum));
if (precision < 0) precision = 0;
scale = Gtk::manage( new Gtk::Scale() );
scale->set_range (axis.minimum, axis.maximum);
scale->set_value (axis.set_val);
scale->set_digits (precision);
scale->set_hexpand(true);
add( *scale );
}
// ------------------------------------------------------------- //
FontVariations::FontVariations () :
Gtk::Grid ()
{
// std::cout << "FontVariations::FontVariations" << std::endl;
set_orientation( Gtk::ORIENTATION_VERTICAL );
set_name ("FontVariations");
size_group = Gtk::SizeGroup::create(Gtk::SIZE_GROUP_HORIZONTAL);
show_all_children();
}
// Update GUI based on query.
void
FontVariations::update (const Glib::ustring& font_spec) {
font_instance* res = font_factory::Default()->FaceFromFontSpecification (font_spec.c_str());
auto children = get_children();
for (auto child: children) {
remove ( *child );
}
axes.clear();
for (auto a: res->openTypeVarAxes) {
// std::cout << "Creating axis: " << a.first << std::endl;
FontVariationAxis* axis = Gtk::manage( new FontVariationAxis( a.first, a.second ));
axes.push_back( axis );
add( *axis );
size_group->add_widget( *(axis->get_label()) ); // Keep labels the same width
axis->get_scale()->signal_value_changed().connect(
sigc::mem_fun(*this, &FontVariations::on_variations_change)
);
}
show_all_children();
}
void
FontVariations::fill_css( SPCSSAttr *css ) {
// Eventually will want to favor using 'font-weight', etc. but at the moment these
// can't handle "fractional" values. See CSS Fonts Module Level 4.
sp_repr_css_set_property(css, "font-variation-settings", get_css_string().c_str());
}
Glib::ustring
FontVariations::get_css_string() {
Glib::ustring css_string;
for (auto axis: axes) {
Glib::ustring name = axis->get_name();
// Translate the "named" axes. (Additional names in 'stat' table, may need to handle them.)
if (name == "Width") name = "wdth"; // 'font-stretch'
if (name == "Weight") name = "wght"; // 'font-weight'
if (name == "Optical size") name = "opsz"; // 'font-optical-sizing' Can trigger glyph substitution.
if (name == "Slant") name = "slnt"; // 'font-style'
if (name == "Italic") name = "ital"; // 'font-style' Toggles from Roman to Italic.
std::stringstream value;
value << std::fixed << std::setprecision(axis->get_precision()) << axis->get_value();
css_string += "'" + name + "' " + value.str() + "', ";
}
return css_string;
}
Glib::ustring
FontVariations::get_pango_string() {
Glib::ustring pango_string;
if (!axes.empty()) {
pango_string += "@";
for (auto axis: axes) {
if (axis->get_value() == 0) continue; // TEMP: Should check against default value.
Glib::ustring name = axis->get_name();
// Translate the "named" axes. (Additional names in 'stat' table, may need to handle them.)
if (name == "Width") name = "wdth"; // 'font-stretch'
if (name == "Weight") name = "wght"; // 'font-weight'
if (name == "Optical size") name = "opsz"; // 'font-optical-sizing' Can trigger glyph substitution.
if (name == "Slant") name = "slnt"; // 'font-style'
if (name == "Italic") name = "ital"; // 'font-style' Toggles from Roman to Italic.
std::stringstream value;
value << std::fixed << std::setprecision(axis->get_precision()) << axis->get_value();
pango_string += name + "=" + value.str() + ",";
}
pango_string.erase (pango_string.size() - 1); // Erase last ','
}
return pango_string;
}
void
FontVariations::on_variations_change() {
// std::cout << "FontVariations::on_variations_change: " << get_css_string() << std::endl;;
signal_changed.emit ();
}
bool FontVariations::variations_present() const {
return !axes.empty();
}
} // namespace Widget
} // namespace UI
} // namespace Inkscape
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8 :
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