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Diffstat (limited to 'src/ui/widget/font-variations.cpp')
| -rw-r--r-- | src/ui/widget/font-variations.cpp | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/ui/widget/font-variations.cpp b/src/ui/widget/font-variations.cpp new file mode 100644 index 0000000..fae5cc3 --- /dev/null +++ b/src/ui/widget/font-variations.cpp @@ -0,0 +1,179 @@ +// 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 : |