From 42de45f074704e378ededa7fd21e44ec6b3fde02 Mon Sep 17 00:00:00 2001
From: Piotr Murach <pmurach@gmail.com>
Date: Sat, 24 Aug 2024 16:12:11 +0200
Subject: [PATCH] Add TTY::Link::Terminals::Kitty to detect hyperlinks support
 in kitty

---
 lib/tty/link/terminals/kitty.rb   | 48 +++++++++++++++++++++++++++++++
 spec/unit/link_spec.rb            |  9 ++++++
 spec/unit/terminals/kitty_spec.rb | 33 +++++++++++++++++++++
 3 files changed, 90 insertions(+)
 create mode 100644 lib/tty/link/terminals/kitty.rb
 create mode 100644 spec/unit/terminals/kitty_spec.rb

diff --git a/lib/tty/link/terminals/kitty.rb b/lib/tty/link/terminals/kitty.rb
new file mode 100644
index 0000000..6e28137
--- /dev/null
+++ b/lib/tty/link/terminals/kitty.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+module TTY
+  class Link
+    module Terminals
+      # Responsible for detecting hyperlink support in the kitty terminal
+      #
+      # @api private
+      class Kitty < Abstract
+        # The kitty terminal name pattern
+        #
+        # @return [Regexp]
+        #
+        # @api private
+        KITTY = /kitty/i.freeze
+        private_constant :KITTY
+
+        private
+
+        # Detect kitty terminal
+        #
+        # @example
+        #   kitty.name?
+        #   # => true
+        #
+        # @return [Boolean]
+        #
+        # @api private
+        def name?
+          !(term =~ KITTY).nil?
+        end
+
+        # Detect any kitty version to support terminal hyperlinks
+        #
+        # @example
+        #   kitty.version?
+        #   # => true
+        #
+        # @return [Boolean]
+        #
+        # @api private
+        def version?
+          true
+        end
+      end # Kitty
+    end # Terminals
+  end # Link
+end # TTY
diff --git a/spec/unit/link_spec.rb b/spec/unit/link_spec.rb
index 17da17c..abac0a2 100644
--- a/spec/unit/link_spec.rb
+++ b/spec/unit/link_spec.rb
@@ -117,6 +117,15 @@
       end
     end
 
+    context "when kitty" do
+      it "supports links on any version" do
+        env = {"TERM" => "xterm-kitty"}
+        link = described_class.new(env: env, output: output)
+
+        expect(link.link?).to eq(true)
+      end
+    end
+
     context "when VTE" do
       it "supports links above the 0.50.1 version" do
         env = {"VTE_VERSION" => "5001"}
diff --git a/spec/unit/terminals/kitty_spec.rb b/spec/unit/terminals/kitty_spec.rb
new file mode 100644
index 0000000..f578146
--- /dev/null
+++ b/spec/unit/terminals/kitty_spec.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+RSpec.describe TTY::Link::Terminals::Kitty, "#link?" do
+  let(:semantic_version) { TTY::Link::SemanticVersion }
+
+  it "supports links on any version" do
+    env = {"TERM" => "xterm-kitty"}
+    kitty = described_class.new(semantic_version, env)
+
+    expect(kitty.link?).to eq(true)
+  end
+
+  it "supports a terminal name without the 'xterm-' prefix" do
+    env = {"TERM" => "Kitty"}
+    kitty = described_class.new(semantic_version, env)
+
+    expect(kitty.link?).to eq(true)
+  end
+
+  it "doesn't support links without a terminal name" do
+    env = {"TERM" => nil}
+    kitty = described_class.new(semantic_version, env)
+
+    expect(kitty.link?).to eq(false)
+  end
+
+  it "doesn't support links with a non-kitty terminal name" do
+    env = {"TERM" => "other-terminal"}
+    kitty = described_class.new(semantic_version, env)
+
+    expect(kitty.link?).to eq(false)
+  end
+end