viewTransitionSelector and namespace options

lib/datastar/server_sent_event_generator.rb

@@ -34,12 +34,16 @@ class ServerSentEventGenerator
 
     DEFAULT_SSE_RETRY_DURATION = 1000
     DEFAULT_ELEMENTS_USE_VIEW_TRANSITIONS = false
+    DEFAULT_ELEMENTS_VIEW_TRANSITION_SELECTOR = ''
+    DEFAULT_ELEMENTS_NAMESPACE = 'html'
     DEFAULT_PATCH_SIGNALS_ONLY_IF_MISSING = false
 
     SELECTOR_DATALINE_LITERAL = 'selector'
     MODE_DATALINE_LITERAL = 'mode'
     ELEMENTS_DATALINE_LITERAL = 'elements'
     USE_VIEW_TRANSITION_DATALINE_LITERAL = 'useViewTransition'
+    VIEW_TRANSITION_SELECTOR_DATALINE_LITERAL = 'viewTransitionSelector'
+    NAMESPACE_DATALINE_LITERAL = 'namespace'
     SIGNALS_DATALINE_LITERAL = 'signals'
     ONLY_IF_MISSING_DATALINE_LITERAL = 'onlyIfMissing'
 
@@ -56,6 +60,8 @@ class ServerSentEventGenerator
       'retry' => DEFAULT_SSE_RETRY_DURATION,
       MODE_DATALINE_LITERAL => DEFAULT_ELEMENT_PATCH_MODE,
       USE_VIEW_TRANSITION_DATALINE_LITERAL => DEFAULT_ELEMENTS_USE_VIEW_TRANSITIONS,
+      VIEW_TRANSITION_SELECTOR_DATALINE_LITERAL => DEFAULT_ELEMENTS_VIEW_TRANSITION_SELECTOR,
+      NAMESPACE_DATALINE_LITERAL => DEFAULT_ELEMENTS_NAMESPACE,
       ONLY_IF_MISSING_DATALINE_LITERAL => DEFAULT_PATCH_SIGNALS_ONLY_IF_MISSING,
     }.freeze
 

spec/dispatcher_spec.rb

@@ -127,6 +127,50 @@ def wait_for_close(&)
       expect(socket.lines).to eq([%(event: datastar-patch-elements\nid: 72\nretry: 2000\ndata: useViewTransition true\ndata: elements <div id="foo">\ndata: elements <span>hello</span>\ndata: elements </div>\n\n)])
     end
 
+    it 'takes a viewTransitionSelector option' do
+      dispatcher.patch_elements(
+        %(<div id="foo">\n<span>hello</span>\n</div>),
+        view_transition_selector: '#main',
+      )
+      socket = TestSocket.new
+      dispatcher.response.body.call(socket)
+      expect(socket.open).to be(false)
+      expect(socket.lines).to eq([%(event: datastar-patch-elements\ndata: viewTransitionSelector #main\ndata: elements <div id="foo">\ndata: elements <span>hello</span>\ndata: elements </div>\n\n)])
+    end
+
+    it 'omits viewTransitionSelector if using default value' do
+      dispatcher.patch_elements(
+        %(<div id="foo">\n<span>hello</span>\n</div>),
+        view_transition_selector: '',
+      )
+      socket = TestSocket.new
+      dispatcher.response.body.call(socket)
+      expect(socket.open).to be(false)
+      expect(socket.lines).to eq([%(event: datastar-patch-elements\ndata: elements <div id="foo">\ndata: elements <span>hello</span>\ndata: elements </div>\n\n)])
+    end
+
+    it 'takes a namespace option' do
+      dispatcher.patch_elements(
+        %(<div id="foo">\n<span>hello</span>\n</div>),
+        namespace: 'svg',
+      )
+      socket = TestSocket.new
+      dispatcher.response.body.call(socket)
+      expect(socket.open).to be(false)
+      expect(socket.lines).to eq([%(event: datastar-patch-elements\ndata: namespace svg\ndata: elements <div id="foo">\ndata: elements <span>hello</span>\ndata: elements </div>\n\n)])
+    end
+
+    it 'omits namespace if using default value' do
+      dispatcher.patch_elements(
+        %(<div id="foo">\n<span>hello</span>\n</div>),
+        namespace: 'html',
+      )
+      socket = TestSocket.new
+      dispatcher.response.body.call(socket)
+      expect(socket.open).to be(false)
+      expect(socket.lines).to eq([%(event: datastar-patch-elements\ndata: elements <div id="foo">\ndata: elements <span>hello</span>\ndata: elements </div>\n\n)])
+    end
+
     it 'omits retry if using default value' do
       dispatcher.patch_elements(
         %(<div id="foo">\n<span>hello</span>\n</div>\n),