LibGfx: Add Font::width(u32* codepoints, size_t)

This allows you to measure the width of a UTF-32 sequence.

Author: awesomekling

Libraries/LibGfx/Font.cpp

@@ -255,4 +255,14 @@ int Font::width(const Utf8View& utf8) const
     return width;
 }
 
+int Font::width(const u32* codepoints, size_t length) const
+{
+    if (length == 0)
+        return 0;
+    int width = (length - 1) * glyph_spacing();
+    for (size_t i = 0; i < length; ++i)
+        width += glyph_or_emoji_width(codepoints[i]);
+    return width;
+}
+
 }

Libraries/LibGfx/Font.h

@@ -95,6 +95,7 @@ class Font : public RefCounted<Font> {
 
     int width(const StringView&) const;
     int width(const Utf8View&) const;
+    int width(const u32* codepoints, size_t) const;
 
     String name() const { return m_name; }
     void set_name(const StringView& name) { m_name = name; }