update syntax highlighting on edits

src/core/file_buffer.odin

@@ -978,6 +978,8 @@ insert_content :: proc(buffer: ^FileBuffer, to_be_inserted: []u8, append_to_end:
         update_file_buffer_index_from_cursor(buffer);
         move_cursor_right(buffer, false, amt = len(to_be_inserted) - 1);
     }
+
+    ts.parse_buffer(&buffer.tree, tree_sitter_file_buffer_input(buffer))
 }
 
 delete_content_from_buffer_cursor :: proc(buffer: ^FileBuffer, amount: int) {
@@ -996,6 +998,8 @@ delete_content_from_buffer_cursor :: proc(buffer: ^FileBuffer, amount: int) {
         buffer.history.cursor.line = it.cursor.line
         buffer.history.cursor.col = it.cursor.col
     }
+
+    ts.parse_buffer(&buffer.tree, tree_sitter_file_buffer_input(buffer))
 }
 
 delete_content_from_selection :: proc(buffer: ^FileBuffer, selection: ^Selection) {
@@ -1003,6 +1007,8 @@ delete_content_from_selection :: proc(buffer: ^FileBuffer, selection: ^Selection
     delete_text_in_span(buffer_piece_table(buffer), &selection.start.index, &selection.end.index)
 
     buffer.history.cursor.index = selection.start.index
+
+    ts.parse_buffer(&buffer.tree, tree_sitter_file_buffer_input(buffer))
 }
 
 delete_content :: proc{delete_content_from_buffer_cursor, delete_content_from_selection};

src/panels/file_buffer.odin

@@ -433,12 +433,14 @@ file_buffer_text_input_actions :: proc(input_map: ^core.InputActions) {
         buffer := &(&(transmute(^core.Panel)user_data).type.(core.FileBufferPanel)).buffer
 
         core.pop_snapshot(&buffer.history, true)
+        ts.parse_buffer(&buffer.tree, core.tree_sitter_file_buffer_input(buffer))
     }, "Undo");
 
     core.register_ctrl_key_action(input_map, .R, proc(state: ^core.State, user_data: rawptr) {
         buffer := &(&(transmute(^core.Panel)user_data).type.(core.FileBufferPanel)).buffer
 
         core.recover_snapshot(&buffer.history)
+        ts.parse_buffer(&buffer.tree, core.tree_sitter_file_buffer_input(buffer))
     }, "Redo");
 
     // TODO: add shift+o to insert newline above current one