Fix the symbol filter not working in the mapping view (#315)

* Fix the symbol filter not working in the mapping view

* Separate the mapping filter from the regular filter

* Make set/get search function names consistent with each other

objdiff-gui/src/views/diff.rs

@@ -290,7 +290,7 @@ pub fn diff_view_ui(
                 });
             } else if left_ctx.status.success && !left_ctx.has_symbol() {
                 ui.horizontal(|ui| {
-                    let mut search = state.search.clone();
+                    let mut search = state.get_current_search();
                     let response =
                         TextEdit::singleline(&mut search).hint_text("Filter symbols").ui(ui);
                     if hotkeys::consume_symbol_filter_shortcut(ui.ctx()) {
@@ -480,7 +480,7 @@ pub fn diff_view_ui(
                         }
                     }
                 } else if right_ctx.status.success && !right_ctx.has_symbol() {
-                    let mut search = state.search.clone();
+                    let mut search = state.get_current_search();
                     let response =
                         TextEdit::singleline(&mut search).hint_text("Filter symbols").ui(ui);
                     if hotkeys::consume_symbol_filter_shortcut(ui.ctx()) {
@@ -827,7 +827,7 @@ fn diff_col_ui(
                 ui,
                 SymbolDiffContext { obj, diff },
                 &state.symbol_state,
-                SymbolFilter::Mapping(other_symbol_idx, None),
+                SymbolFilter::Mapping(other_symbol_idx, state.mapping_search_regex.as_ref()),
                 appearance,
                 column,
                 open_sections,

objdiff-gui/src/views/symbol_diff.rs

@@ -118,6 +118,8 @@ pub struct DiffViewState {
     pub function_state: FunctionViewState,
     pub search: String,
     pub search_regex: Option<Regex>,
+    pub mapping_search: String,
+    pub mapping_search_regex: Option<Regex>,
     pub scroll_to_diff_row: Option<usize>,
     pub build_running: bool,
     pub scratch_available: bool,
@@ -155,6 +157,9 @@ impl DiffViewState {
                     self.current_view = result.view;
                     self.symbol_state.left_symbol = result.left_symbol;
                     self.symbol_state.right_symbol = result.right_symbol;
+                    // Clear the mapping filter so it's not saved between mapping different symbols.
+                    self.mapping_search = "".to_string();
+                    self.mapping_search_regex = None;
                 }
 
                 false
@@ -269,12 +274,7 @@ impl DiffViewState {
                 self.symbol_state.autoscroll_to_highlighted_symbols = autoscroll;
             }
             DiffViewAction::SetSearch(search) => {
-                self.search_regex = if search.is_empty() {
-                    None
-                } else {
-                    RegexBuilder::new(&search).case_insensitive(true).build().ok()
-                };
-                self.search = search;
+                self.set_current_search(search);
             }
             DiffViewAction::CreateScratch(function_name) => {
                 let Ok(state) = state.read() else {
@@ -395,6 +395,29 @@ impl DiffViewState {
             target_symbol: symbol_diff.target_symbol,
         })
     }
+
+    pub fn get_current_search(&self) -> String {
+        if self.current_view == View::FunctionDiff {
+            self.mapping_search.clone()
+        } else {
+            self.search.clone()
+        }
+    }
+
+    fn set_current_search(&mut self, search: String) {
+        let search_regex = if search.is_empty() {
+            None
+        } else {
+            RegexBuilder::new(&search).case_insensitive(true).build().ok()
+        };
+        if self.current_view == View::FunctionDiff {
+            self.mapping_search = search;
+            self.mapping_search_regex = search_regex;
+        } else {
+            self.search = search;
+            self.search_regex = search_regex;
+        }
+    }
 }
 
 struct ResolvedSymbol<'obj> {