AK+Everywhere: Rename String to DeprecatedString

We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)

24 files changed, 88 insertions, 88 deletions

diff --git a/Userland/Libraries/LibPDF/Document.cpp b/Userland/Libraries/LibPDF/Document.cpp
index 38a70d1989..f6260d5020 100644
--- a/Userland/Libraries/LibPDF/Document.cpp
+++ b/Userland/Libraries/LibPDF/Document.cpp
@@ -10,9 +10,9 @@
 
 namespace PDF {
 
-String OutlineItem::to_string(int indent) const
+DeprecatedString OutlineItem::to_string(int indent) const
 {
-    auto indent_str = String::repeated("  "sv, indent + 1);
+    auto indent_str = DeprecatedString::repeated("  "sv, indent + 1);
 
     StringBuilder child_builder;
     child_builder.append('[');
@@ -29,7 +29,7 @@ String OutlineItem::to_string(int indent) const
     builder.appendff("{}italic={}\n", indent_str, italic);
     builder.appendff("{}bold={}\n", indent_str, bold);
     builder.appendff("{}children={}\n", indent_str, child_builder.to_string());
-    builder.appendff("{}}}", String::repeated("  "sv, indent));
+    builder.appendff("{}}}", DeprecatedString::repeated("  "sv, indent));
 
     return builder.to_string();
 }
diff --git a/Userland/Libraries/LibPDF/Document.h b/Userland/Libraries/LibPDF/Document.h
index 83cf7453a5..8dca3cc3e9 100644
--- a/Userland/Libraries/LibPDF/Document.h
+++ b/Userland/Libraries/LibPDF/Document.h
@@ -57,7 +57,7 @@ struct Destination {
 struct OutlineItem final : public RefCounted<OutlineItem> {
     RefPtr<OutlineItem> parent;
     NonnullRefPtrVector<OutlineItem> children;
-    String title;
+    DeprecatedString title;
     i32 count { 0 };
     Destination dest;
     Gfx::Color color { Color::NamedColor::Black }; // 'C' in the PDF spec
@@ -66,7 +66,7 @@ struct OutlineItem final : public RefCounted<OutlineItem> {
 
     OutlineItem() = default;
 
-    String to_string(int indent) const;
+    DeprecatedString to_string(int indent) const;
 };
 
 struct OutlineDict final : public RefCounted<OutlineDict> {
diff --git a/Userland/Libraries/LibPDF/DocumentParser.cpp b/Userland/Libraries/LibPDF/DocumentParser.cpp
index 13161ffd54..7212645665 100644
--- a/Userland/Libraries/LibPDF/DocumentParser.cpp
+++ b/Userland/Libraries/LibPDF/DocumentParser.cpp
@@ -79,14 +79,14 @@ PDFErrorOr<void> DocumentParser::parse_header()
 
     char major_ver = m_reader.read();
     if (major_ver != '1' && major_ver != '2')
-        return error(String::formatted("Unknown major version \"{}\"", major_ver));
+        return error(DeprecatedString::formatted("Unknown major version \"{}\"", major_ver));
 
     if (m_reader.read() != '.')
         return error("Malformed PDF version");
 
     char minor_ver = m_reader.read();
     if (minor_ver < '0' || minor_ver > '7')
-        return error(String::formatted("Unknown minor version \"{}\"", minor_ver));
+        return error(DeprecatedString::formatted("Unknown minor version \"{}\"", minor_ver));
 
     m_reader.consume_eol();
 
@@ -435,12 +435,12 @@ PDFErrorOr<NonnullRefPtr<XRefTable>> DocumentParser::parse_xref_table()
         auto object_count = object_count_value.get<int>();
 
         for (int i = 0; i < object_count; i++) {
-            auto offset_string = String(m_reader.bytes().slice(m_reader.offset(), 10));
+            auto offset_string = DeprecatedString(m_reader.bytes().slice(m_reader.offset(), 10));
             m_reader.move_by(10);
             if (!m_reader.consume(' '))
                 return error("Malformed xref entry");
 
-            auto generation_string = String(m_reader.bytes().slice(m_reader.offset(), 5));
+            auto generation_string = DeprecatedString(m_reader.bytes().slice(m_reader.offset(), 5));
             m_reader.move_by(5);
             if (!m_reader.consume(' '))
                 return error("Malformed xref entry");
@@ -701,7 +701,7 @@ PDFErrorOr<RefPtr<DictObject>> DocumentParser::conditionally_parse_page_tree_nod
     auto dict_value = TRY(parse_object_with_index(object_index));
     auto dict_object = dict_value.get<NonnullRefPtr<Object>>();
     if (!dict_object->is<DictObject>())
-        return error(String::formatted("Invalid page tree with xref index {}", object_index));
+        return error(DeprecatedString::formatted("Invalid page tree with xref index {}", object_index));
 
     auto dict = dict_object->cast<DictObject>();
     if (!dict->contains_any_of(CommonNames::Type, CommonNames::Parent, CommonNames::Kids, CommonNames::Count))
diff --git a/Userland/Libraries/LibPDF/Encoding.h b/Userland/Libraries/LibPDF/Encoding.h
index 007abc810e..44b56cb4de 100644
--- a/Userland/Libraries/LibPDF/Encoding.h
+++ b/Userland/Libraries/LibPDF/Encoding.h
@@ -626,7 +626,7 @@
 namespace PDF {
 
 struct CharDescriptor {
-    String name;
+    DeprecatedString name;
     u32 code_point;
 };
 
@@ -643,13 +643,13 @@ public:
     static NonnullRefPtr<Encoding> zapf_encoding();
 
     HashMap<u16, CharDescriptor> const& descriptors() const { return m_descriptors; }
-    HashMap<String, u16> const& name_mapping() const { return m_name_mapping; }
+    HashMap<DeprecatedString, u16> const& name_mapping() const { return m_name_mapping; }
 
     CharDescriptor const& get_char_code_descriptor(u16 char_code) const;
 
 protected:
     HashMap<u16, CharDescriptor> m_descriptors;
-    HashMap<String, u16> m_name_mapping;
+    HashMap<DeprecatedString, u16> m_name_mapping;
 };
 
 }
diff --git a/Userland/Libraries/LibPDF/Encryption.cpp b/Userland/Libraries/LibPDF/Encryption.cpp
index 6b4be34c99..f84047314c 100644
--- a/Userland/Libraries/LibPDF/Encryption.cpp
+++ b/Userland/Libraries/LibPDF/Encryption.cpp
@@ -70,7 +70,7 @@ PDFErrorOr<NonnullRefPtr<StandardSecurityHandler>> StandardSecurityHandler::crea
     return adopt_ref(*new StandardSecurityHandler(document, revision, o, u, p, encrypt_metadata, length));
 }
 
-StandardSecurityHandler::StandardSecurityHandler(Document* document, size_t revision, String const& o_entry, String const& u_entry, u32 flags, bool encrypt_metadata, size_t length)
+StandardSecurityHandler::StandardSecurityHandler(Document* document, size_t revision, DeprecatedString const& o_entry, DeprecatedString const& u_entry, u32 flags, bool encrypt_metadata, size_t length)
     : m_document(document)
     , m_revision(revision)
     , m_o_entry(o_entry)
@@ -317,7 +317,7 @@ void StandardSecurityHandler::encrypt(NonnullRefPtr<Object> object, Reference re
         auto string = object->cast<StringObject>();
         bytes = string->string().bytes();
         assign = [&string](ByteBuffer const& buffer) {
-            string->set_string(String(buffer.bytes()));
+            string->set_string(DeprecatedString(buffer.bytes()));
         };
     } else {
         VERIFY_NOT_REACHED();
diff --git a/Userland/Libraries/LibPDF/Encryption.h b/Userland/Libraries/LibPDF/Encryption.h
index e01848b66f..d740202afa 100644
--- a/Userland/Libraries/LibPDF/Encryption.h
+++ b/Userland/Libraries/LibPDF/Encryption.h
@@ -28,7 +28,7 @@ class StandardSecurityHandler : public SecurityHandler {
 public:
     static PDFErrorOr<NonnullRefPtr<StandardSecurityHandler>> create(Document*, NonnullRefPtr<DictObject> encryption_dict);
 
-    StandardSecurityHandler(Document*, size_t revision, String const& o_entry, String const& u_entry, u32 flags, bool encrypt_metadata, size_t length);
+    StandardSecurityHandler(Document*, size_t revision, DeprecatedString const& o_entry, DeprecatedString const& u_entry, u32 flags, bool encrypt_metadata, size_t length);
 
     ~StandardSecurityHandler() override = default;
 
@@ -49,8 +49,8 @@ private:
     Document* m_document;
     size_t m_revision;
     Optional<ByteBuffer> m_encryption_key;
-    String m_o_entry;
-    String m_u_entry;
+    DeprecatedString m_o_entry;
+    DeprecatedString m_u_entry;
     u32 m_flags;
     bool m_encrypt_metadata;
     size_t m_length;
diff --git a/Userland/Libraries/LibPDF/Error.h b/Userland/Libraries/LibPDF/Error.h
index 62dd207609..380ab7c620 100644
--- a/Userland/Libraries/LibPDF/Error.h
+++ b/Userland/Libraries/LibPDF/Error.h
@@ -6,7 +6,7 @@
 
 #pragma once
 
-#include <AK/String.h>
+#include <AK/DeprecatedString.h>
 
 namespace PDF {
 
@@ -20,32 +20,32 @@ public:
 
     Error(AK::Error error)
         : m_type(Type::Internal)
-        , m_message(String::formatted("Internal error while processing PDF file: {}", error.string_literal()))
+        , m_message(DeprecatedString::formatted("Internal error while processing PDF file: {}", error.string_literal()))
     {
     }
 
-    Error(Type type, String const& message)
+    Error(Type type, DeprecatedString const& message)
         : m_type(type)
     {
         switch (type) {
         case Type::Parse:
-            m_message = String::formatted("Failed to parse PDF file: {}", message);
+            m_message = DeprecatedString::formatted("Failed to parse PDF file: {}", message);
             break;
         case Type::Internal:
-            m_message = String::formatted("Internal error while processing PDF file: {}", message);
+            m_message = DeprecatedString::formatted("Internal error while processing PDF file: {}", message);
             break;
         case Type::MalformedPDF:
-            m_message = String::formatted("Malformed PDF file: {}", message);
+            m_message = DeprecatedString::formatted("Malformed PDF file: {}", message);
             break;
         }
     }
 
     Type type() const { return m_type; }
-    String const& message() const { return m_message; }
+    DeprecatedString const& message() const { return m_message; }
 
 private:
     Type m_type;
-    String m_message;
+    DeprecatedString m_message;
 };
 
 template<typename T>
diff --git a/Userland/Libraries/LibPDF/Fonts/PDFFont.cpp b/Userland/Libraries/LibPDF/Fonts/PDFFont.cpp
index 226929b217..a2db01050f 100644
--- a/Userland/Libraries/LibPDF/Fonts/PDFFont.cpp
+++ b/Userland/Libraries/LibPDF/Fonts/PDFFont.cpp
@@ -87,12 +87,12 @@ PDFErrorOr<NonnullRefPtr<PDFFont>> PDFFont::create(Document* document, NonnullRe
     TODO();
 }
 
-Tuple<String, String> PDFFont::replacement_for_standard_latin_font(StringView name)
+Tuple<DeprecatedString, DeprecatedString> PDFFont::replacement_for_standard_latin_font(StringView name)
 {
     bool is_bold = name.contains("bold"sv);
     bool is_italic = name.contains("italic"sv);
 
-    String font_variant;
+    DeprecatedString font_variant;
 
     if (is_bold && is_italic) {
         font_variant = "BoldItalic";
diff --git a/Userland/Libraries/LibPDF/Fonts/PDFFont.h b/Userland/Libraries/LibPDF/Fonts/PDFFont.h
index c6dc8f7509..555c81a929 100644
--- a/Userland/Libraries/LibPDF/Fonts/PDFFont.h
+++ b/Userland/Libraries/LibPDF/Fonts/PDFFont.h
@@ -47,7 +47,7 @@ public:
     virtual Type type() const = 0;
 
 protected:
-    static Tuple<String, String> replacement_for_standard_latin_font(StringView);
+    static Tuple<DeprecatedString, DeprecatedString> replacement_for_standard_latin_font(StringView);
 
     bool m_is_standard_font { false };
 };
diff --git a/Userland/Libraries/LibPDF/Fonts/PS1FontProgram.cpp b/Userland/Libraries/LibPDF/Fonts/PS1FontProgram.cpp
index ef328d9a2c..cddf05b1bf 100644
--- a/Userland/Libraries/LibPDF/Fonts/PS1FontProgram.cpp
+++ b/Userland/Libraries/LibPDF/Fonts/PS1FontProgram.cpp
@@ -361,7 +361,7 @@ PDFErrorOr<PS1FontProgram::Glyph> PS1FontProgram::parse_glyph(ReadonlyBytes cons
                 }
 
                 default:
-                    return error(String::formatted("Unhandled command: 12 {}", data[i]));
+                    return error(DeprecatedString::formatted("Unhandled command: 12 {}", data[i]));
                 }
                 break;
             }
@@ -447,7 +447,7 @@ PDFErrorOr<PS1FontProgram::Glyph> PS1FontProgram::parse_glyph(ReadonlyBytes cons
             }
 
             default:
-                return error(String::formatted("Unhandled command: {}", v));
+                return error(DeprecatedString::formatted("Unhandled command: {}", v));
             }
         }
     }
@@ -560,7 +560,7 @@ PDFErrorOr<Vector<float>> PS1FontProgram::parse_number_array(Reader& reader, siz
     return array;
 }
 
-PDFErrorOr<String> PS1FontProgram::parse_word(Reader& reader)
+PDFErrorOr<DeprecatedString> PS1FontProgram::parse_word(Reader& reader)
 {
     reader.consume_whitespace();
 
@@ -579,7 +579,7 @@ PDFErrorOr<String> PS1FontProgram::parse_word(Reader& reader)
 PDFErrorOr<float> PS1FontProgram::parse_float(Reader& reader)
 {
     auto word = TRY(parse_word(reader));
-    return strtof(String(word).characters(), nullptr);
+    return strtof(DeprecatedString(word).characters(), nullptr);
 }
 
 PDFErrorOr<int> PS1FontProgram::parse_int(Reader& reader)
@@ -609,7 +609,7 @@ PDFErrorOr<ByteBuffer> PS1FontProgram::decrypt(ReadonlyBytes const& encrypted, u
     return decrypted;
 }
 
-bool PS1FontProgram::seek_name(Reader& reader, String const& name)
+bool PS1FontProgram::seek_name(Reader& reader, DeprecatedString const& name)
 {
     auto start = reader.offset();
 
@@ -631,7 +631,7 @@ bool PS1FontProgram::seek_name(Reader& reader, String const& name)
 }
 
 Error PS1FontProgram::error(
-    String const& message
+    DeprecatedString const& message
 #ifdef PDF_DEBUG
     ,
     SourceLocation loc
diff --git a/Userland/Libraries/LibPDF/Fonts/PS1FontProgram.h b/Userland/Libraries/LibPDF/Fonts/PS1FontProgram.h
index b576bdc31c..acbd554e35 100644
--- a/Userland/Libraries/LibPDF/Fonts/PS1FontProgram.h
+++ b/Userland/Libraries/LibPDF/Fonts/PS1FontProgram.h
@@ -54,15 +54,15 @@ private:
     PDFErrorOr<void> parse_encrypted_portion(ByteBuffer const&);
     PDFErrorOr<Vector<ByteBuffer>> parse_subroutines(Reader&);
     PDFErrorOr<Vector<float>> parse_number_array(Reader&, size_t length);
-    PDFErrorOr<String> parse_word(Reader&);
+    PDFErrorOr<DeprecatedString> parse_word(Reader&);
     PDFErrorOr<float> parse_float(Reader&);
     PDFErrorOr<int> parse_int(Reader&);
 
     PDFErrorOr<ByteBuffer> decrypt(ReadonlyBytes const&, u16 key, size_t skip);
-    bool seek_name(Reader&, String const&);
+    bool seek_name(Reader&, DeprecatedString const&);
 
     static Error error(
-        String const& message
+        DeprecatedString const& message
 #ifdef PDF_DEBUG
         ,
         SourceLocation loc = SourceLocation::current()
diff --git a/Userland/Libraries/LibPDF/Fonts/Type0Font.h b/Userland/Libraries/LibPDF/Fonts/Type0Font.h
index 08561c60fd..f58492c275 100644
--- a/Userland/Libraries/LibPDF/Fonts/Type0Font.h
+++ b/Userland/Libraries/LibPDF/Fonts/Type0Font.h
@@ -11,8 +11,8 @@
 namespace PDF {
 
 struct CIDSystemInfo {
-    String registry;
-    String ordering;
+    DeprecatedString registry;
+    DeprecatedString ordering;
     u8 supplement;
 };
 
diff --git a/Userland/Libraries/LibPDF/Object.h b/Userland/Libraries/LibPDF/Object.h
index edda73608f..ae70cefebd 100644
--- a/Userland/Libraries/LibPDF/Object.h
+++ b/Userland/Libraries/LibPDF/Object.h
@@ -75,7 +75,7 @@ public:
     }
 
     virtual char const* type_name() const = 0;
-    virtual String to_string(int indent) const = 0;
+    virtual DeprecatedString to_string(int indent) const = 0;
 
 protected:
 #define ENUMERATE_TYPE(_, name)    \
diff --git a/Userland/Libraries/LibPDF/ObjectDerivatives.cpp b/Userland/Libraries/LibPDF/ObjectDerivatives.cpp
index 987692f33e..e6c2a26f6e 100644
--- a/Userland/Libraries/LibPDF/ObjectDerivatives.cpp
+++ b/Userland/Libraries/LibPDF/ObjectDerivatives.cpp
@@ -36,21 +36,21 @@ static void append_indent(StringBuilder& builder, int indent)
         builder.append("  "sv);
 }
 
-String StringObject::to_string(int) const
+DeprecatedString StringObject::to_string(int) const
 {
     if (is_binary())
-        return String::formatted("<{}>", encode_hex(string().bytes()).to_uppercase());
-    return String::formatted("({})", string());
+        return DeprecatedString::formatted("<{}>", encode_hex(string().bytes()).to_uppercase());
+    return DeprecatedString::formatted("({})", string());
 }
 
-String NameObject::to_string(int) const
+DeprecatedString NameObject::to_string(int) const
 {
     StringBuilder builder;
     builder.appendff("/{}", this->name());
     return builder.to_string();
 }
 
-String ArrayObject::to_string(int indent) const
+DeprecatedString ArrayObject::to_string(int indent) const
 {
     StringBuilder builder;
     builder.append("[\n"sv);
@@ -70,7 +70,7 @@ String ArrayObject::to_string(int indent) const
     return builder.to_string();
 }
 
-String DictObject::to_string(int indent) const
+DeprecatedString DictObject::to_string(int indent) const
 {
     StringBuilder builder;
     builder.append("<<\n"sv);
@@ -91,7 +91,7 @@ String DictObject::to_string(int indent) const
     return builder.to_string();
 }
 
-String StreamObject::to_string(int indent) const
+DeprecatedString StreamObject::to_string(int indent) const
 {
     StringBuilder builder;
     builder.append("stream\n"sv);
@@ -117,7 +117,7 @@ String StreamObject::to_string(int indent) const
     return builder.to_string();
 }
 
-String IndirectValue::to_string(int indent) const
+DeprecatedString IndirectValue::to_string(int indent) const
 {
     StringBuilder builder;
     builder.appendff("{} {} obj\n", index(), generation_index());
diff --git a/Userland/Libraries/LibPDF/ObjectDerivatives.h b/Userland/Libraries/LibPDF/ObjectDerivatives.h
index cdb8dd7ef7..d98fed63c3 100644
--- a/Userland/Libraries/LibPDF/ObjectDerivatives.h
+++ b/Userland/Libraries/LibPDF/ObjectDerivatives.h
@@ -19,7 +19,7 @@ namespace PDF {
 
 class StringObject final : public Object {
 public:
-    StringObject(String string, bool is_binary)
+    StringObject(DeprecatedString string, bool is_binary)
         : m_string(move(string))
         , m_is_binary(is_binary)
     {
@@ -27,18 +27,18 @@ public:
 
     ~StringObject() override = default;
 
-    [[nodiscard]] ALWAYS_INLINE String const& string() const { return m_string; }
+    [[nodiscard]] ALWAYS_INLINE DeprecatedString const& string() const { return m_string; }
     [[nodiscard]] ALWAYS_INLINE bool is_binary() const { return m_is_binary; }
-    void set_string(String string) { m_string = move(string); }
+    void set_string(DeprecatedString string) { m_string = move(string); }
 
     char const* type_name() const override { return "string"; }
-    String to_string(int indent) const override;
+    DeprecatedString to_string(int indent) const override;
 
 protected:
     bool is_string() const override { return true; }
 
 private:
-    String m_string;
+    DeprecatedString m_string;
     bool m_is_binary;
 };
 
@@ -54,7 +54,7 @@ public:
     [[nodiscard]] ALWAYS_INLINE FlyString const& name() const { return m_name; }
 
     char const* type_name() const override { return "name"; }
-    String to_string(int indent) const override;
+    DeprecatedString to_string(int indent) const override;
 
 protected:
     bool is_name() const override { return true; }
@@ -90,7 +90,7 @@ public:
     {
         return "array";
     }
-    String to_string(int indent) const override;
+    DeprecatedString to_string(int indent) const override;
 
 protected:
     bool is_array() const override { return true; }
@@ -136,7 +136,7 @@ public:
     {
         return "dict";
     }
-    String to_string(int indent) const override;
+    DeprecatedString to_string(int indent) const override;
 
 protected:
     bool is_dict() const override { return true; }
@@ -160,7 +160,7 @@ public:
     [[nodiscard]] ByteBuffer& buffer() { return m_buffer; };
 
     char const* type_name() const override { return "stream"; }
-    String to_string(int indent) const override;
+    DeprecatedString to_string(int indent) const override;
 
 private:
     bool is_stream() const override { return true; }
@@ -184,7 +184,7 @@ public:
     [[nodiscard]] ALWAYS_INLINE Value const& value() const { return m_value; }
 
     char const* type_name() const override { return "indirect_object"; }
-    String to_string(int indent) const override;
+    DeprecatedString to_string(int indent) const override;
 
 protected:
     bool is_indirect_value() const override { return true; }
diff --git a/Userland/Libraries/LibPDF/Operator.h b/Userland/Libraries/LibPDF/Operator.h
index eae89c7dc0..4ab1062398 100644
--- a/Userland/Libraries/LibPDF/Operator.h
+++ b/Userland/Libraries/LibPDF/Operator.h
@@ -6,8 +6,8 @@
 
 #pragma once
 
+#include <AK/DeprecatedString.h>
 #include <AK/Format.h>
-#include <AK/String.h>
 #include <AK/StringBuilder.h>
 #include <AK/Vector.h>
 #include <LibPDF/Value.h>
diff --git a/Userland/Libraries/LibPDF/Parser.cpp b/Userland/Libraries/LibPDF/Parser.cpp
index 6cd8136e40..245162b695 100644
--- a/Userland/Libraries/LibPDF/Parser.cpp
+++ b/Userland/Libraries/LibPDF/Parser.cpp
@@ -37,7 +37,7 @@ void Parser::set_document(WeakPtr<Document> const& document)
     m_document = document;
 }
 
-String Parser::parse_comment()
+DeprecatedString Parser::parse_comment()
 {
     if (!m_reader.matches('%'))
         return {};
@@ -47,7 +47,7 @@ String Parser::parse_comment()
     m_reader.move_until([&](auto) {
         return m_reader.matches_eol();
     });
-    String str = StringView(m_reader.bytes().slice(comment_start_offset, m_reader.offset() - comment_start_offset));
+    DeprecatedString str = StringView(m_reader.bytes().slice(comment_start_offset, m_reader.offset() - comment_start_offset));
     m_reader.consume_eol();
     m_reader.consume_whitespace();
     return str;
@@ -98,7 +98,7 @@ PDFErrorOr<Value> Parser::parse_value(CanBeIndirectValue can_be_indirect_value)
     if (m_reader.matches('['))
         return TRY(parse_array());
 
-    return error(String::formatted("Unexpected char \"{}\"", m_reader.peek()));
+    return error(DeprecatedString::formatted("Unexpected char \"{}\"", m_reader.peek()));
 }
 
 PDFErrorOr<Value> Parser::parse_possible_indirect_value_or_ref()
@@ -193,7 +193,7 @@ PDFErrorOr<Value> Parser::parse_number()
 
     m_reader.consume_whitespace();
 
-    auto string = String(m_reader.bytes().slice(start_offset, m_reader.offset() - start_offset));
+    auto string = DeprecatedString(m_reader.bytes().slice(start_offset, m_reader.offset() - start_offset));
     if (is_float)
         return Value(strtof(string.characters(), nullptr));
 
@@ -240,7 +240,7 @@ NonnullRefPtr<StringObject> Parser::parse_string()
 {
     ScopeGuard guard([&] { m_reader.consume_whitespace(); });
 
-    String string;
+    DeprecatedString string;
     bool is_binary_string;
 
     if (m_reader.matches('(')) {
@@ -272,7 +272,7 @@ NonnullRefPtr<StringObject> Parser::parse_string()
     return string_object;
 }
 
-String Parser::parse_literal_string()
+DeprecatedString Parser::parse_literal_string()
 {
     VERIFY(m_reader.consume('('));
     StringBuilder builder;
@@ -350,7 +350,7 @@ String Parser::parse_literal_string()
     return builder.to_string();
 }
 
-String Parser::parse_hex_string()
+DeprecatedString Parser::parse_hex_string()
 {
     VERIFY(m_reader.consume('<'));
 
@@ -558,7 +558,7 @@ PDFErrorOr<Vector<Operator>> Parser::parse_operators()
 }
 
 Error Parser::error(
-    String const& message
+    DeprecatedString const& message
 #ifdef PDF_DEBUG
     ,
     SourceLocation loc
diff --git a/Userland/Libraries/LibPDF/Parser.h b/Userland/Libraries/LibPDF/Parser.h
index 9e5cb4da20..bfe46d65c3 100644
--- a/Userland/Libraries/LibPDF/Parser.h
+++ b/Userland/Libraries/LibPDF/Parser.h
@@ -34,7 +34,7 @@ public:
 
     void set_document(WeakPtr<Document> const&);
 
-    String parse_comment();
+    DeprecatedString parse_comment();
 
     void move_by(size_t count) { m_reader.move_by(count); }
     void move_to(size_t offset) { m_reader.move_to(offset); }
@@ -51,8 +51,8 @@ public:
     PDFErrorOr<Value> parse_number();
     PDFErrorOr<NonnullRefPtr<NameObject>> parse_name();
     NonnullRefPtr<StringObject> parse_string();
-    String parse_literal_string();
-    String parse_hex_string();
+    DeprecatedString parse_literal_string();
+    DeprecatedString parse_hex_string();
     PDFErrorOr<NonnullRefPtr<ArrayObject>> parse_array();
     PDFErrorOr<NonnullRefPtr<DictObject>> parse_dict();
     PDFErrorOr<NonnullRefPtr<StreamObject>> parse_stream(NonnullRefPtr<DictObject> dict);
@@ -63,7 +63,7 @@ protected:
     void pop_reference() { m_current_reference_stack.take_last(); }
 
     Error error(
-        String const& message
+        DeprecatedString const& message
 #ifdef PDF_DEBUG
         ,
         SourceLocation loc = SourceLocation::current()
diff --git a/Userland/Libraries/LibPDF/Reader.h b/Userland/Libraries/LibPDF/Reader.h
index 361e62af16..112752e271 100644
--- a/Userland/Libraries/LibPDF/Reader.h
+++ b/Userland/Libraries/LibPDF/Reader.h
@@ -7,10 +7,10 @@
 #pragma once
 
 #include <AK/Debug.h>
+#include <AK/DeprecatedString.h>
 #include <AK/Function.h>
 #include <AK/ScopeGuard.h>
 #include <AK/Span.h>
-#include <AK/String.h>
 #include <AK/Vector.h>
 
 namespace PDF {
@@ -81,7 +81,7 @@ public:
 
     bool matches(char const* chars) const
     {
-        String string(chars);
+        DeprecatedString string(chars);
         if (remaining() < string.length())
             return false;
 
@@ -149,7 +149,7 @@ public:
 
         for (auto i = from; i <= to; i++) {
             char value = static_cast<char>(bytes().at(i));
-            auto line = String::formatted("  {}: '{}' (value={:3d}) ", i, value, static_cast<u8>(value));
+            auto line = DeprecatedString::formatted("  {}: '{}' (value={:3d}) ", i, value, static_cast<u8>(value));
             if (i == offset()) {
                 dbgln("{} <<< current location, forwards={}", line, m_forwards);
             } else {
diff --git a/Userland/Libraries/LibPDF/Renderer.cpp b/Userland/Libraries/LibPDF/Renderer.cpp
index 8eb8edab1f..36b9a54ff6 100644
--- a/Userland/Libraries/LibPDF/Renderer.cpp
+++ b/Userland/Libraries/LibPDF/Renderer.cpp
@@ -729,7 +729,7 @@ PDFErrorOr<void> Renderer::set_graphics_state_from_dict(NonnullRefPtr<DictObject
     return {};
 }
 
-void Renderer::show_text(String const& string)
+void Renderer::show_text(DeprecatedString const& string)
 {
     auto& text_rendering_matrix = calculate_text_rendering_matrix();
 
diff --git a/Userland/Libraries/LibPDF/Renderer.h b/Userland/Libraries/LibPDF/Renderer.h
index 6f9a271a55..be4341bc00 100644
--- a/Userland/Libraries/LibPDF/Renderer.h
+++ b/Userland/Libraries/LibPDF/Renderer.h
@@ -108,7 +108,7 @@ private:
     void begin_path_paint();
     void end_path_paint();
     PDFErrorOr<void> set_graphics_state_from_dict(NonnullRefPtr<DictObject>);
-    void show_text(String const&);
+    void show_text(DeprecatedString const&);
     PDFErrorOr<NonnullRefPtr<ColorSpace>> get_color_space(Value const&, NonnullRefPtr<DictObject>);
 
     ALWAYS_INLINE GraphicsState const& state() const { return m_graphics_state_stack.last(); }
diff --git a/Userland/Libraries/LibPDF/Value.cpp b/Userland/Libraries/LibPDF/Value.cpp
index 7af1c1d7ea..a95da9774b 100644
--- a/Userland/Libraries/LibPDF/Value.cpp
+++ b/Userland/Libraries/LibPDF/Value.cpp
@@ -9,27 +9,27 @@
 
 namespace PDF {
 
-String Value::to_string(int indent) const
+DeprecatedString Value::to_string(int indent) const
 {
     return visit(
-        [&](Empty const&) -> String {
+        [&](Empty const&) -> DeprecatedString {
             // Return type deduction means that we can't use implicit conversions.
             return "<empty>";
         },
-        [&](std::nullptr_t const&) -> String {
+        [&](std::nullptr_t const&) -> DeprecatedString {
             return "null";
         },
-        [&](bool const& b) -> String {
+        [&](bool const& b) -> DeprecatedString {
             return b ? "true" : "false";
         },
         [&](int const& i) {
-            return String::number(i);
+            return DeprecatedString::number(i);
         },
         [&](float const& f) {
-            return String::number(f);
+            return DeprecatedString::number(f);
         },
         [&](Reference const& ref) {
-            return String::formatted("{} {} R", ref.as_ref_index(), ref.as_ref_generation_index());
+            return DeprecatedString::formatted("{} {} R", ref.as_ref_index(), ref.as_ref_generation_index());
         },
         [&](NonnullRefPtr<Object> const& object) {
             return object->to_string(indent);
diff --git a/Userland/Libraries/LibPDF/Value.h b/Userland/Libraries/LibPDF/Value.h
index aca082ebe4..4c7ebe21fd 100644
--- a/Userland/Libraries/LibPDF/Value.h
+++ b/Userland/Libraries/LibPDF/Value.h
@@ -6,9 +6,9 @@
 
 #pragma once
 
+#include <AK/DeprecatedString.h>
 #include <AK/Format.h>
 #include <AK/RefPtr.h>
-#include <AK/String.h>
 #include <AK/Variant.h>
 #include <LibPDF/Forward.h>
 #include <LibPDF/Object.h>
@@ -36,7 +36,7 @@ public:
         set<NonnullRefPtr<Object>>(*refptr);
     }
 
-    [[nodiscard]] String to_string(int indent = 0) const;
+    [[nodiscard]] DeprecatedString to_string(int indent = 0) const;
 
     [[nodiscard]] ALWAYS_INLINE bool has_number() const { return has<int>() || has<float>(); }
 
diff --git a/Userland/Libraries/LibPDF/XRefTable.h b/Userland/Libraries/LibPDF/XRefTable.h
index 20b4cef5c7..9a2ffd4c7b 100644
--- a/Userland/Libraries/LibPDF/XRefTable.h
+++ b/Userland/Libraries/LibPDF/XRefTable.h
@@ -6,9 +6,9 @@
 
 #pragma once
 
+#include <AK/DeprecatedString.h>
 #include <AK/Format.h>
 #include <AK/RefCounted.h>
-#include <AK/String.h>
 #include <AK/Vector.h>
 #include <LibPDF/Error.h>
 
@@ -124,7 +124,7 @@ struct Formatter<PDF::XRefEntry> : Formatter<StringView> {
     ErrorOr<void> format(FormatBuilder& builder, PDF::XRefEntry const& entry)
     {
         return Formatter<StringView>::format(builder,
-            String::formatted("XRefEntry {{ offset={} generation={} used={} }}",
+            DeprecatedString::formatted("XRefEntry {{ offset={} generation={} used={} }}",
                 entry.byte_offset,
                 entry.generation_number,
                 entry.in_use));