From e1328a3e3f6f006cc7702b772932ca3e50c09b53 Mon Sep 17 00:00:00 2001
From: Simon Tatham <anakin@pobox.com>
Date: Sat, 3 Feb 2024 10:54:27 +0000
Subject: [PATCH] Change FileType::CAN_LIST into a method.

Now it can return extra information determined at run time.
---
 src/file.rs | 31 ++++++++++++++++++++-----------
 1 file changed, 20 insertions(+), 11 deletions(-)

diff --git a/src/file.rs b/src/file.rs
index 9fc7dad..3141285 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -75,7 +75,7 @@ trait FileDataSource {
     fn extendable(&self) -> bool;
 
     fn single_id(&self) -> String {
-        panic!("Should only call this if the FileType sets CAN_LIST, CAN_GET_POSTS or IS_EXAMINE_USER");
+        panic!("Should only call this if the FileType sets can_list(), CAN_GET_POSTS or IS_EXAMINE_USER");
     }
 
     fn want_to_jump_to_new_content(&self) -> bool {
@@ -169,7 +169,6 @@ enum CanList {
 
 trait FileType {
     type Item: TextFragment + Sized;
-    const CAN_LIST: CanList = CanList::Nothing;
     const CAN_GET_POSTS: bool = false;
     const IS_EXAMINE_USER: bool = false;
 
@@ -182,6 +181,10 @@ trait FileType {
     fn feed_id(&self) -> Option<&FeedId> {
         None
     }
+
+    fn can_list(&self) -> CanList {
+        CanList::Nothing
+    }
 }
 
 struct StatusFeedType {
@@ -1237,7 +1240,7 @@ impl<Type: FileType, Source: FileDataSource> ActivityState
                 } else {
                     fs
                 };
-                let fs = if Type::CAN_LIST != CanList::Nothing {
+                let fs = if self.file_desc.can_list() != CanList::Nothing {
                     fs.add(Pr('l'), "List", 40)
                 } else {
                     fs
@@ -1309,7 +1312,7 @@ impl<Type: FileType, Source: FileDataSource> ActivityState
                 )
             }
             UIMode::ListSubmenu => {
-                let fs = match Type::CAN_LIST {
+                let fs = match self.file_desc.can_list() {
                     CanList::ForUser => fs
                         .add(Pr('I'), "List Followers", 99)
                         .add(Pr('O'), "List Followed", 99),
@@ -1575,7 +1578,7 @@ impl<Type: FileType, Source: FileDataSource> ActivityState
                 }
 
                 Pr('l') | Pr('L') => {
-                    if Type::CAN_LIST != CanList::Nothing {
+                    if self.file_desc.can_list() != CanList::Nothing {
                         self.ui_mode = UIMode::ListSubmenu;
                     }
                     LogicalAction::Nothing
@@ -1631,7 +1634,7 @@ impl<Type: FileType, Source: FileDataSource> ActivityState
             },
             UIMode::ListSubmenu => match key {
                 Pr('f') | Pr('F') => {
-                    if Type::CAN_LIST == CanList::ForPost {
+                    if self.file_desc.can_list() == CanList::ForPost {
                         LogicalAction::Goto(
                             UtilityActivity::ListStatusFavouriters(
                                 self.contents.source.single_id(),
@@ -1644,7 +1647,7 @@ impl<Type: FileType, Source: FileDataSource> ActivityState
                 }
 
                 Pr('b') | Pr('B') => {
-                    if Type::CAN_LIST == CanList::ForPost {
+                    if self.file_desc.can_list() == CanList::ForPost {
                         LogicalAction::Goto(
                             UtilityActivity::ListStatusBoosters(
                                 self.contents.source.single_id(),
@@ -1657,7 +1660,7 @@ impl<Type: FileType, Source: FileDataSource> ActivityState
                 }
 
                 Pr('i') | Pr('I') => {
-                    if Type::CAN_LIST == CanList::ForUser {
+                    if self.file_desc.can_list() == CanList::ForUser {
                         LogicalAction::Goto(
                             UtilityActivity::ListUserFollowers(
                                 self.contents.source.single_id(),
@@ -1670,7 +1673,7 @@ impl<Type: FileType, Source: FileDataSource> ActivityState
                 }
 
                 Pr('o') | Pr('O') => {
-                    if Type::CAN_LIST == CanList::ForUser {
+                    if self.file_desc.can_list() == CanList::ForUser {
                         LogicalAction::Goto(
                             UtilityActivity::ListUserFollowees(
                                 self.contents.source.single_id(),
@@ -2062,7 +2065,6 @@ pub fn hashtag_timeline(
 struct ExamineUserFileType {}
 impl FileType for ExamineUserFileType {
     type Item = ExamineUserDisplay;
-    const CAN_LIST: CanList = CanList::ForUser;
     const CAN_GET_POSTS: bool = true;
     const IS_EXAMINE_USER: bool = true;
 
@@ -2074,6 +2076,10 @@ impl FileType for ExamineUserFileType {
         let ac = client.account_by_id(id)?;
         ExamineUserDisplay::new(ac, client)
     }
+
+    fn can_list(&self) -> CanList {
+        CanList::ForUser
+    }
 }
 
 pub fn examine_user(
@@ -2102,7 +2108,6 @@ pub fn examine_user(
 struct DetailedStatusFileType {}
 impl FileType for DetailedStatusFileType {
     type Item = DetailedStatusDisplay;
-    const CAN_LIST: CanList = CanList::ForPost;
 
     fn get_item(
         &self,
@@ -2112,6 +2117,10 @@ impl FileType for DetailedStatusFileType {
         let st = client.status_by_id(id)?;
         Ok(DetailedStatusDisplay::new(st, client))
     }
+
+    fn can_list(&self) -> CanList {
+        CanList::ForPost
+    }
 }
 
 pub fn view_single_post(
-- 
2.30.2