LibGfx: Make FontDatabase API use FlyString for family and variant

This reduces work done by font lookups.

Userland/Libraries/LibGfx/FontDatabase.cpp

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <AK/FlyString.h>
 #include <AK/NonnullRefPtrVector.h>
 #include <AK/QuickSort.h>
 #include <LibCore/DirIterator.h>
@@ -164,7 +165,7 @@ RefPtr<Gfx::Font> FontDatabase::get_by_name(StringView name)
     return it->value;
 }
 
-RefPtr<Gfx::Font> FontDatabase::get(String const& family, unsigned size, unsigned weight, unsigned slope, Font::AllowInexactSizeMatch allow_inexact_size_match)
+RefPtr<Gfx::Font> FontDatabase::get(FlyString const& family, unsigned size, unsigned weight, unsigned slope, Font::AllowInexactSizeMatch allow_inexact_size_match)
 {
     for (auto typeface : m_private->typefaces) {
         if (typeface->family() == family && typeface->weight() == weight && typeface->slope() == slope)
@@ -173,7 +174,7 @@ RefPtr<Gfx::Font> FontDatabase::get(String const& family, unsigned size, unsigne
     return nullptr;
 }
 
-RefPtr<Gfx::Font> FontDatabase::get(String const& family, const String& variant, unsigned size, Font::AllowInexactSizeMatch allow_inexact_size_match)
+RefPtr<Gfx::Font> FontDatabase::get(FlyString const& family, FlyString const& variant, unsigned size, Font::AllowInexactSizeMatch allow_inexact_size_match)
 {
     for (auto typeface : m_private->typefaces) {
         if (typeface->family() == family && typeface->variant() == variant)

Userland/Libraries/LibGfx/FontDatabase.h

@@ -44,8 +44,8 @@ public:
     static void set_fixed_width_font_query(String);
     static void set_default_fonts_lookup_path(String);
 
-    RefPtr<Gfx::Font> get(const String& family, unsigned size, unsigned weight, unsigned slope, Font::AllowInexactSizeMatch = Font::AllowInexactSizeMatch::No);
-    RefPtr<Gfx::Font> get(const String& family, const String& variant, unsigned size, Font::AllowInexactSizeMatch = Font::AllowInexactSizeMatch::No);
+    RefPtr<Gfx::Font> get(FlyString const& family, unsigned size, unsigned weight, unsigned slope, Font::AllowInexactSizeMatch = Font::AllowInexactSizeMatch::No);
+    RefPtr<Gfx::Font> get(FlyString const& family, FlyString const& variant, unsigned size, Font::AllowInexactSizeMatch = Font::AllowInexactSizeMatch::No);
     RefPtr<Gfx::Font> get_by_name(StringView);
     void for_each_font(Function<void(const Gfx::Font&)>);
     void for_each_fixed_width_font(Function<void(const Gfx::Font&)>);

Userland/Libraries/LibGfx/Typeface.h

@@ -6,9 +6,9 @@
 
 #pragma once
 
+#include <AK/FlyString.h>
 #include <AK/Function.h>
 #include <AK/RefCounted.h>
-#include <AK/String.h>
 #include <AK/Vector.h>
 #include <LibGfx/BitmapFont.h>
 #include <LibGfx/Font.h>
@@ -24,8 +24,8 @@ public:
     {
     }
 
-    String family() const { return m_family; }
-    String variant() const { return m_variant; }
+    FlyString const& family() const { return m_family; }
+    FlyString const& variant() const { return m_variant; }
     unsigned weight() const;
     u8 slope() const;
 
@@ -39,8 +39,8 @@ public:
     RefPtr<Font> get_font(unsigned size, Font::AllowInexactSizeMatch = Font::AllowInexactSizeMatch::No) const;
 
 private:
-    String m_family;
-    String m_variant;
+    FlyString m_family;
+    FlyString m_variant;
 
     Vector<RefPtr<BitmapFont>> m_bitmap_fonts;
     RefPtr<TTF::Font> m_ttf_font;