From 94b74937d8f6a8680386388b8c34e0167fc06ebd Mon Sep 17 00:00:00 2001
From: thankyouverycool <66646555+thankyouverycool@users.noreply.github.com>
Date: Tue, 22 Feb 2022 15:00:56 -0500
Subject: [PATCH] LibGUI+LibSyntax: Stringify Highlighter::Language

This patch adds a Highlighter::Language -> string helper and a
callback for Highlighter changes.
---
 Userland/Libraries/LibGUI/TextEditor.cpp     |  2 ++
 Userland/Libraries/LibGUI/TextEditor.h       |  1 +
 Userland/Libraries/LibSyntax/Highlighter.cpp | 26 ++++++++++++++++++++
 Userland/Libraries/LibSyntax/Highlighter.h   |  1 +
 4 files changed, 30 insertions(+)

diff --git a/Userland/Libraries/LibGUI/TextEditor.cpp b/Userland/Libraries/LibGUI/TextEditor.cpp
index b1ad773e62..4e23c8cc9f 100644
--- a/Userland/Libraries/LibGUI/TextEditor.cpp
+++ b/Userland/Libraries/LibGUI/TextEditor.cpp
@@ -1934,6 +1934,8 @@ void TextEditor::set_syntax_highlighter(OwnPtr<Syntax::Highlighter> highlighter)
         m_needs_rehighlight = true;
     } else
         document().set_spans({});
+    if (on_highlighter_change)
+        on_highlighter_change();
 }
 
 AutocompleteProvider const* TextEditor::autocomplete_provider() const
diff --git a/Userland/Libraries/LibGUI/TextEditor.h b/Userland/Libraries/LibGUI/TextEditor.h
index ba3e46a97e..dd64808930 100644
--- a/Userland/Libraries/LibGUI/TextEditor.h
+++ b/Userland/Libraries/LibGUI/TextEditor.h
@@ -107,6 +107,7 @@ public:
     Function<void()> on_selection_change;
     Function<void()> on_focusin;
     Function<void()> on_focusout;
+    Function<void()> on_highlighter_change;
 
     void set_text(StringView, AllowCallback = AllowCallback::Yes);
     void scroll_cursor_into_view();
diff --git a/Userland/Libraries/LibSyntax/Highlighter.cpp b/Userland/Libraries/LibSyntax/Highlighter.cpp
index f93938f5ab..0b01d10ff9 100644
--- a/Userland/Libraries/LibSyntax/Highlighter.cpp
+++ b/Userland/Libraries/LibSyntax/Highlighter.cpp
@@ -142,4 +142,30 @@ void Highlighter::register_nested_token_pairs(Vector<MatchingTokenPair> pairs)
         m_nested_token_pairs.set(pair);
 }
 
+StringView Highlighter::language_string(Language language) const
+{
+    switch (language) {
+    case Language::Cpp:
+        return "C++"sv;
+    case Language::CSS:
+        return "CSS"sv;
+    case Language::GitCommit:
+        return "Git"sv;
+    case Language::GML:
+        return "GML"sv;
+    case Language::HTML:
+        return "HTML"sv;
+    case Language::INI:
+        return "INI"sv;
+    case Language::JavaScript:
+        return "JavaScript"sv;
+    case Language::Shell:
+        return "Shell"sv;
+    case Language::SQL:
+        return "SQL"sv;
+    default:
+        VERIFY_NOT_REACHED();
+    }
+}
+
 }
diff --git a/Userland/Libraries/LibSyntax/Highlighter.h b/Userland/Libraries/LibSyntax/Highlighter.h
index 5351b462bc..c18fd54788 100644
--- a/Userland/Libraries/LibSyntax/Highlighter.h
+++ b/Userland/Libraries/LibSyntax/Highlighter.h
@@ -40,6 +40,7 @@ public:
     virtual ~Highlighter();
 
     virtual Language language() const = 0;
+    StringView language_string(Language) const;
     virtual void rehighlight(const Palette&) = 0;
     virtual void highlight_matching_token_pair();