LibGfx+Applications: Add human readable name helper for fonts

This returns a more comprehensible name than raw weight and slope
metrics and is intended for use in UIs. Now displays human readable
font names in FontSettings, TerminalSettings and CharacterMap.

Userland/Applications/CharacterMap/CharacterMapWidget.cpp

@@ -144,7 +144,7 @@ void CharacterMapWidget::initialize_menubar(GUI::Window& window)
 void CharacterMapWidget::did_change_font()
 {
     m_glyph_map->set_font(font());
-    m_font_name_label->set_text(font().qualified_name());
+    m_font_name_label->set_text(font().human_readable_name());
     m_output_box->set_font(font());
 }
 

Userland/Applications/DisplaySettings/FontSettings.gml

@@ -28,7 +28,6 @@
 
             @GUI::Label {
                 name: "default_font_label"
-                text: "Katica 10 400"
             }
         }
 
@@ -61,7 +60,6 @@
 
             @GUI::Label {
                 name: "fixed_width_font_label"
-                text: "Csilla 10 400"
             }
         }
 

Userland/Applications/DisplaySettings/FontSettingsWidget.cpp

@@ -51,13 +51,13 @@ FontSettingsWidget::~FontSettingsWidget()
 
 static void update_label_with_font(GUI::Label& label, Gfx::Font const& font)
 {
-    label.set_text(font.qualified_name());
+    label.set_text(font.human_readable_name());
     label.set_font(font);
 }
 
 void FontSettingsWidget::apply_settings()
 {
-    GUI::WindowServerConnection::the().set_system_fonts(m_default_font_label->text(), m_fixed_width_font_label->text());
+    GUI::WindowServerConnection::the().set_system_fonts(m_default_font_label->font().qualified_name(), m_fixed_width_font_label->font().qualified_name());
 }
 
 }

Userland/Applications/TerminalSettings/TerminalSettingsView.gml

@@ -54,7 +54,6 @@
 
                 @GUI::Label {
                     name: "terminal_font_label"
-                    text: "Csilla 10 400"
                 }
             }
 

Userland/Applications/TerminalSettings/TerminalSettingsWidget.cpp

@@ -129,13 +129,13 @@ TerminalSettingsViewWidget::TerminalSettingsViewWidget()
     else
         m_font = Gfx::FontDatabase::the().get_by_name(font_name);
     m_original_font = m_font;
-    font_text.set_text(m_font->qualified_name());
+    font_text.set_text(m_font->human_readable_name());
     font_text.set_font(m_font);
     font_button.on_click = [&](auto) {
         auto picker = GUI::FontPicker::construct(window(), m_font.ptr(), true);
         if (picker->exec() == GUI::Dialog::ExecOK) {
             m_font = picker->font();
-            font_text.set_text(m_font->qualified_name());
+            font_text.set_text(m_font->human_readable_name());
             font_text.set_font(m_font);
             Config::write_string("Terminal", "Text", "Font", m_font->qualified_name());
         }
@@ -143,14 +143,18 @@ TerminalSettingsViewWidget::TerminalSettingsViewWidget()
 
     auto& font_selection = *find_descendant_of_type_named<GUI::Widget>("terminal_font_selection");
     auto& use_default_font_button = *find_descendant_of_type_named<GUI::CheckBox>("terminal_font_defaulted");
-    use_default_font_button.on_checked = [&](bool use_default_font) {
+    use_default_font_button.on_checked = [&, font_name](bool use_default_font) {
         if (use_default_font) {
             font_selection.set_enabled(false);
             m_font = Gfx::FontDatabase::the().default_fixed_width_font();
+            font_text.set_text(m_font->human_readable_name());
+            font_text.set_font(m_font);
             Config::write_string("Terminal", "Text", "Font", m_font->qualified_name());
         } else {
             font_selection.set_enabled(true);
-            m_font = Gfx::FontDatabase::the().get_by_name(font_text.text());
+            m_font = font_name.is_empty()
+                ? Gfx::FontDatabase::the().default_fixed_width_font()
+                : Gfx::FontDatabase::the().get_by_name(font_name);
             Config::write_string("Terminal", "Text", "Font", m_font->qualified_name());
         }
     };

Userland/Libraries/LibGfx/BitmapFont.h

@@ -105,6 +105,7 @@ public:
     String variant() const override;
 
     String qualified_name() const override;
+    String human_readable_name() const override { return String::formatted("{} {} {}", family(), variant(), presentation_size()); }
 
 private:
     BitmapFont(String name, String family, u8* rows, u8* widths, bool is_fixed_width,

Userland/Libraries/LibGfx/Font.h

@@ -135,6 +135,7 @@ public:
     virtual String variant() const = 0;
 
     virtual String qualified_name() const = 0;
+    virtual String human_readable_name() const = 0;
 
     Font const& bold_variant() const;
 

Userland/Libraries/LibGfx/TrueTypeFont/Font.h

@@ -146,6 +146,7 @@ public:
     virtual String family() const override { return m_font->family(); }
     virtual String variant() const override { return m_font->variant(); }
     virtual String qualified_name() const override { return String::formatted("{} {} {} {}", family(), presentation_size(), weight(), slope()); }
+    virtual String human_readable_name() const override { return String::formatted("{} {} {}", family(), variant(), presentation_size()); }
 
 private:
     NonnullRefPtr<TTF::Font> m_font;