add dumb unsaved flag

src/core/file_buffer.odin

@@ -46,6 +46,7 @@ FileBuffer :: struct {
     file_path: string,
     extension: string,
 
+    flags: BufferFlagSet,
     top_line: int,
     selection: Maybe(Selection),
 
@@ -57,6 +58,11 @@ FileBuffer :: struct {
     input_buffer: [dynamic]u8,
 }
 
+BufferFlagSet :: bit_set[BufferFlags]
+BufferFlags :: enum {
+    UnsavedChanges,
+}
+
 FileBufferIter :: struct {
     cursor: Cursor,
     buffer: ^FileBuffer,
@@ -777,6 +783,7 @@ save_buffer_to_disk :: proc(state: ^State, buffer: ^FileBuffer) -> (error: os.Er
     os.flush(fd)
 
     log.infof("written %v bytes", offset)
+    buffer.flags -= { .UnsavedChanges }
     
     return
 }
@@ -905,7 +912,6 @@ draw_file_buffer :: proc(state: ^State, buffer: ^FileBuffer, x, y, w, h: int, sh
         // and its after the text because the line length needs to be calculated
         if state.mode == .Visual && buffer.selection != nil {
             selection := swap_selections(buffer.selection.?)
-            // selection := buffer.selection.?
 
             sel_x := x + padding;
             width: int
@@ -944,17 +950,10 @@ update_file_buffer_scroll :: proc(buffer: ^FileBuffer, cursor: Maybe(^Cursor) =
     } else if cursor.?.line < (buffer.top_line + 5) {
         buffer.top_line = math.max(cursor.?.line - 5, 0);
     }
-
-    // if buffer.history.cursor.line > (buffer.top_line + buffer.glyphs.height - 5) {
-    //     buffer.top_line = math.max(buffer.history.cursor.line - buffer.glyphs.height + 5, 0);
-    // } else if buffer.history.cursor.line < (buffer.top_line + 5) {
-    //     buffer.top_line = math.max(buffer.history.cursor.line - 5, 0);
-    // }
 }
 
 // TODO: don't mangle cursor
 scroll_file_buffer :: proc(buffer: ^FileBuffer, dir: ScrollDir, cursor: Maybe(^Cursor) = nil) {
-
     switch dir {
         case .Up:
         {
@@ -971,6 +970,7 @@ insert_content :: proc(buffer: ^FileBuffer, to_be_inserted: []u8, append_to_end:
     if len(to_be_inserted) == 0 {
         return;
     }
+    buffer.flags += { .UnsavedChanges }
 
     index := buffer.history.cursor.index if !append_to_end else new_piece_table_index_from_end(buffer_piece_table(buffer))
 
@@ -988,6 +988,8 @@ delete_content_from_buffer_cursor :: proc(buffer: ^FileBuffer, amount: int) {
     if amount <= len(buffer.input_buffer) {
         runtime.resize(&buffer.input_buffer, len(buffer.input_buffer)-amount);
     } else {
+        buffer.flags += { .UnsavedChanges }
+
         amount := amount - len(buffer.input_buffer);
         runtime.clear(&buffer.input_buffer);
 
@@ -1005,6 +1007,8 @@ delete_content_from_buffer_cursor :: proc(buffer: ^FileBuffer, amount: int) {
 }
 
 delete_content_from_selection :: proc(buffer: ^FileBuffer, selection: ^Selection) {
+    buffer.flags += { .UnsavedChanges }
+
     selection^ = swap_selections(selection^)
     delete_text_in_span(buffer_piece_table(buffer), &selection.start.index, &selection.end.index)
 

src/panels/file_buffer.odin

@@ -37,12 +37,13 @@ make_file_buffer_panel :: proc(file_path: string, line: int = 0, col: int = 0) -
                     log.error("Failed to create file buffer:", err);
                     return;
                 }
-                panel_state.buffer = buffer
 
                 buffer.history.cursor.line = panel_state.line
                 buffer.history.cursor.col = panel_state.col
                 buffer.top_line = buffer.history.cursor.line
                 core.update_file_buffer_index_from_cursor(&buffer)
+
+                panel_state.buffer = buffer
             }
 
             leader_actions := core.new_input_actions()
@@ -72,14 +73,6 @@ make_file_buffer_panel :: proc(file_path: string, line: int = 0, col: int = 0) -
     }
 }
 
-open_file_buffer_in_new_panel :: proc(state: ^core.State, file_path: string, line, col: int) -> (panel_id: int, ok: bool) {
-    if panel_id, ok := open(state, make_file_buffer_panel(file_path, line, col)); ok {
-        return panel_id, true
-    }
-
-    return -1, false
-}
-
 render_file_buffer :: proc(state: ^core.State, s: ^ui.State, buffer: ^core.FileBuffer) {
     draw_func := proc(state: ^core.State, e: ui.UI_Element, user_data: rawptr) {
         buffer := transmute(^core.FileBuffer)user_data;
@@ -127,6 +120,11 @@ render_file_buffer :: proc(state: ^core.State, s: ^ui.State, buffer: ^core.FileB
             ui.open_element(s, fmt.tprintf("%s", state.mode), {})
             ui.close_element(s)
 
+            if .UnsavedChanges in buffer.flags {
+                ui.open_element(s, "[Unsaved Changes]", {})
+                ui.close_element(s)
+            }
+
             ui.open_element(s, nil, { kind = {ui.Grow{}, ui.Grow{}}})
             ui.close_element(s)
 

src/panels/grep.odin

@@ -76,7 +76,7 @@ make_grep_panel :: proc() -> core.Panel {
                     if panel_state.query_results != nil {
                         selected_result := &panel_state.query_results[panel_state.selected_result]
 
-                        if panel_id, ok := open_file_buffer_in_new_panel(state, selected_result.file_path, selected_result.line, selected_result.col); ok {
+                        if panel_id, ok := open(state, make_file_buffer_panel(selected_result.file_path, selected_result.line, selected_result.col)); ok {
                             close(state, this_panel.id)
 
                             state.current_panel = panel_id