filter: Make excludes_muted_topics a method of the `Filter` class.

web/src/filter.ts

@@ -1208,4 +1208,17 @@ export class Filter {
         }
         return false;
     }
+
+    excludes_muted_topics(): boolean {
+        return (
+            // not narrowed to a topic
+            !(this.has_operator("stream") && this.has_operator("topic")) &&
+            // not narrowed to search
+            !this.is_keyword_search() &&
+            // not narrowed to dms
+            !(this.has_operator("dm") || this.has_operand("is", "dm")) &&
+            // not narrowed to starred messages
+            !this.has_operand("is", "starred")
+        );
+    }
 }

web/src/narrow.js

@@ -410,7 +410,7 @@ export function activate(raw_terms, opts) {
         // From here on down, any calls to the narrow_state API will
         // reflect the upcoming narrow.
         narrow_state.set_has_shown_message_list_view();
-        const excludes_muted_topics = narrow_state.excludes_muted_topics(filter);
+        const excludes_muted_topics = filter.excludes_muted_topics();
 
         let msg_data = new MessageListData({
             filter,

web/src/narrow_state.ts

@@ -378,15 +378,6 @@ export function narrowed_to_starred(current_filter: Filter | undefined = filter(
     return current_filter.has_operand("is", "starred");
 }
 
-export function excludes_muted_topics(filter: Filter): boolean {
-    return (
-        !narrowed_to_topic(filter) &&
-        !narrowed_to_search(filter) &&
-        !narrowed_to_pms(filter) &&
-        !narrowed_to_starred(filter)
-    );
-}
-
 export function is_for_stream_id(stream_id: number, filter?: Filter): boolean {
     // This is not perfect, since we still track narrows by
     // name, not id, but at least the interface is good going

web/tests/narrow_local.test.js

@@ -33,9 +33,9 @@ function test_with(fixture) {
         }
     }
 
-    const excludes_muted_topics = narrow_state.excludes_muted_topics();
+    const excludes_muted_topics = filter.excludes_muted_topics();
     const msg_data = new MessageListData({
-        filter: narrow_state.filter(),
+        filter,
         excludes_muted_topics,
     });
     const id_info = {

web/tests/narrow_state.test.js

@@ -17,11 +17,14 @@ function set_filter(raw_terms) {
         operator: op[0],
         operand: op[1],
     }));
+    const filter = new Filter(terms);
     message_lists.set_current({
         data: {
-            filter: new Filter(terms),
+            filter,
         },
     });
+
+    return filter;
 }
 
 function test(label, f) {
@@ -160,26 +163,27 @@ test("terms", () => {
 });
 
 test("excludes_muted_topics", () => {
-    set_filter([["stream", "devel"]]);
-    assert.ok(narrow_state.excludes_muted_topics());
+    let filter = set_filter([["stream", "devel"]]);
+    assert.ok(filter.excludes_muted_topics());
 
-    message_lists.current = undefined; // not narrowed, basically
-    assert.ok(narrow_state.excludes_muted_topics());
+    // All messages view.
+    filter = set_filter([["in", "home"]]);
+    assert.ok(filter.excludes_muted_topics());
 
-    set_filter([
+    filter = set_filter([
         ["stream", "devel"],
         ["topic", "mac"],
     ]);
-    assert.ok(!narrow_state.excludes_muted_topics());
+    assert.ok(!filter.excludes_muted_topics());
 
-    set_filter([["search", "whatever"]]);
-    assert.ok(!narrow_state.excludes_muted_topics());
+    filter = set_filter([["search", "whatever"]]);
+    assert.ok(!filter.excludes_muted_topics());
 
-    set_filter([["is", "private"]]);
-    assert.ok(!narrow_state.excludes_muted_topics());
+    filter = set_filter([["is", "private"]]);
+    assert.ok(!filter.excludes_muted_topics());
 
-    set_filter([["is", "starred"]]);
-    assert.ok(!narrow_state.excludes_muted_topics());
+    filter = set_filter([["is", "starred"]]);
+    assert.ok(!filter.excludes_muted_topics());
 });
 
 test("set_compose_defaults", () => {