refactor(linkparser): take string views (#6715)

Reviewed-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

CHANGELOG.md

@@ -84,6 +84,7 @@
 - Dev: Prefer `std::expected` over `nonstd::expected_lite`. (#6693)
 - Dev: Moved Twitch PubSub to liveupdates. (#6638)
 - Dev: Refactored types used for emoji parsing. (#6714)
+- Dev: `LinkParser` now parses `QStringView`s. (#6715)
 
 ## 2.5.4
 

benchmarks/src/LinkParser.cpp

@@ -23,7 +23,7 @@ static void BM_LinkParsing(benchmark::State &state)
 
     // Make sure the TLDs are loaded
     {
-        benchmark::DoNotOptimize(linkparser::parse("xd.com"));
+        benchmark::DoNotOptimize(linkparser::parse(u"xd.com"));
     }
 
     for (auto _ : state)

src/common/LinkParser.cpp

@@ -170,7 +170,7 @@ Q_ALWAYS_INLINE bool isValidDomainChar(char16_t c)
 
 namespace chatterino::linkparser {
 
-std::optional<Parsed> parse(const QString &source) noexcept
+std::optional<Parsed> parse(QStringView source) noexcept
 {
     using SizeType = QString::size_type;
 

src/common/LinkParser.hpp

@@ -75,7 +75,9 @@ struct Parsed {
     QStringView link;
 
     /// Checks if the parsed link contains a prefix
-    bool hasPrefix(const QString &source) const noexcept
+    ///
+    /// @param source The exact source string passed to parse()
+    bool hasPrefix(QStringView source) const noexcept
     {
         return this->link.begin() != source.begin();
     }
@@ -89,13 +91,17 @@ struct Parsed {
     /// https://www.forsen.tv/commands
     /// (empty)
     /// ```
-    QStringView prefix(const QString &source) const noexcept
+    ///
+    /// @param source The exact source string passed to parse()
+    QStringView prefix(QStringView source) const noexcept
     {
         return {source.data(), this->link.begin()};
     }
 
     /// Checks if the parsed link contains a suffix
-    bool hasSuffix(const QString &source) const noexcept
+    ///
+    /// @param source The exact source string passed to parse()
+    bool hasSuffix(QStringView source) const noexcept
     {
         return this->link.end() != source.end();
     }
@@ -109,7 +115,9 @@ struct Parsed {
     /// https://www.forsen.tv/commands
     /// (empty)
     /// ```
-    QStringView suffix(const QString &source) const noexcept
+    ///
+    /// @param source The exact source string passed to parse()
+    QStringView suffix(QStringView source) const noexcept
     {
         return {
             this->link.begin() + this->link.size(),
@@ -125,6 +133,6 @@ struct Parsed {
 /// views into @a source.
 ///
 /// For the accepted links, see Parsed.
-std::optional<Parsed> parse(const QString &source) noexcept;
+std::optional<Parsed> parse(QStringView source) noexcept;
 
 }  // namespace chatterino::linkparser

src/controllers/commands/builtin/twitch/SendWhisper.cpp

@@ -143,11 +143,8 @@ bool appendWhisperMessageWordsLocally(const QStringList &words)
                         b.emplace<EmoteElement>(emote,
                                                 MessageElementFlag::EmojiAll);
                     }
-                    void operator()(QStringView stringView,
-                                    MessageBuilder &b) const
+                    void operator()(QStringView string, MessageBuilder &b) const
                     {
-                        QString string =
-                            stringView.toString();  // FIXME: use string view
                         auto link = linkparser::parse(string);
                         if (link)
                         {
@@ -155,7 +152,7 @@ bool appendWhisperMessageWordsLocally(const QStringList &words)
                         }
                         else
                         {
-                            b.emplace<TextElement>(string,
+                            b.emplace<TextElement>(string.toString(),
                                                    MessageElementFlag::Text);
                         }
                     }

src/messages/MessageBuilder.cpp

@@ -1009,7 +1009,7 @@ void MessageBuilder::append(std::unique_ptr<MessageElement> element)
 }
 
 void MessageBuilder::addLink(const linkparser::Parsed &parsedLink,
-                             const QString &source)
+                             QStringView source)
 {
     QString lowercaseLinkString;
     QString origLink = parsedLink.link.toString();

src/messages/MessageBuilder.hpp

@@ -139,7 +139,7 @@ public:
     std::weak_ptr<const Message> weakOf();
 
     void append(std::unique_ptr<MessageElement> element);
-    void addLink(const linkparser::Parsed &parsedLink, const QString &source);
+    void addLink(const linkparser::Parsed &parsedLink, QStringView source);
 
     template <typename T, typename... Args>
     T *emplace(Args &&...args)