Optimize document symbols (#1050)
* optimize document symbol generation * match folding range index to position conversion and documentation to document symbol's * skip function decls with no name * skip document symbol field in opaque type
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Techatrix
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c203110555
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ab23ff3616
@ -15,6 +15,7 @@ const semantic_tokens = @import("semantic_tokens.zig");
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const inlay_hints = @import("inlay_hints.zig");
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const code_actions = @import("code_actions.zig");
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const folding_range = @import("folding_range.zig");
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const document_symbol = @import("document_symbol.zig");
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const shared = @import("shared.zig");
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const Ast = std.zig.Ast;
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const tracy = @import("tracy.zig");
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@ -2498,7 +2499,7 @@ pub fn documentSymbolsHandler(server: *Server, request: types.DocumentSymbolPara
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const handle = server.document_store.getHandle(request.textDocument.uri) orelse return null;
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return try analysis.getDocumentSymbols(server.arena.allocator(), handle.tree, server.offset_encoding);
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return try document_symbol.getDocumentSymbols(server.arena.allocator(), handle.tree, server.offset_encoding);
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}
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pub fn formattingHandler(server: *Server, request: types.DocumentFormattingParams) Error!?[]types.TextEdit {
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231
src/analysis.zig
231
src/analysis.zig
@ -1804,237 +1804,6 @@ pub fn getPositionContext(
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return if (tok.tag == .identifier) PositionContext{ .var_access = tok.loc } else .empty;
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}
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fn addOutlineNodes(allocator: std.mem.Allocator, tree: Ast, child: Ast.Node.Index, context: *GetDocumentSymbolsContext) error{OutOfMemory}!void {
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switch (tree.nodes.items(.tag)[child]) {
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.string_literal,
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.number_literal,
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.builtin_call,
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.builtin_call_comma,
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.builtin_call_two,
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.builtin_call_two_comma,
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.call,
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.call_comma,
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.call_one,
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.call_one_comma,
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.async_call,
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.async_call_comma,
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.async_call_one,
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.async_call_one_comma,
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.identifier,
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.add,
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.add_wrap,
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.array_cat,
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.array_mult,
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.assign,
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.assign_bit_and,
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.assign_bit_or,
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.assign_shl,
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.assign_shr,
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.assign_bit_xor,
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.assign_div,
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.assign_sub,
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.assign_sub_wrap,
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.assign_mod,
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.assign_add,
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.assign_add_wrap,
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.assign_mul,
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.assign_mul_wrap,
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.bang_equal,
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.bit_and,
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.bit_or,
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.shl,
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.shr,
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.bit_xor,
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.bool_and,
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.bool_or,
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.div,
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.equal_equal,
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.error_union,
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.greater_or_equal,
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.greater_than,
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.less_or_equal,
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.less_than,
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.merge_error_sets,
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.mod,
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.mul,
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.mul_wrap,
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.field_access,
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.switch_range,
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.sub,
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.sub_wrap,
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.@"orelse",
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.address_of,
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.@"await",
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.bit_not,
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.bool_not,
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.optional_type,
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.negation,
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.negation_wrap,
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.@"resume",
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.@"try",
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.array_type,
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.array_type_sentinel,
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.ptr_type,
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.ptr_type_aligned,
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.ptr_type_bit_range,
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.ptr_type_sentinel,
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.slice_open,
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.slice_sentinel,
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.deref,
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.unwrap_optional,
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.array_access,
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.@"return",
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.@"break",
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.@"continue",
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.array_init,
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.array_init_comma,
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.array_init_dot,
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.array_init_dot_comma,
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.array_init_dot_two,
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.array_init_dot_two_comma,
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.array_init_one,
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.array_init_one_comma,
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.@"switch",
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.switch_comma,
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.switch_case,
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.switch_case_one,
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.@"for",
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.for_simple,
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.enum_literal,
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.struct_init,
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.struct_init_comma,
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.struct_init_dot,
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.struct_init_dot_comma,
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.struct_init_dot_two,
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.struct_init_dot_two_comma,
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.struct_init_one,
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.struct_init_one_comma,
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.@"while",
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.while_simple,
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.while_cont,
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.@"defer",
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.@"if",
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.if_simple,
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.multiline_string_literal,
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.block,
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.block_semicolon,
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.block_two,
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.block_two_semicolon,
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.error_set_decl,
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=> return,
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.container_decl,
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.container_decl_trailing,
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.container_decl_arg,
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.container_decl_arg_trailing,
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.container_decl_two,
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.container_decl_two_trailing,
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.tagged_union,
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.tagged_union_trailing,
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.tagged_union_enum_tag,
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.tagged_union_enum_tag_trailing,
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.tagged_union_two,
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.tagged_union_two_trailing,
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=> {
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var buf: [2]Ast.Node.Index = undefined;
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const members = tree.fullContainerDecl(&buf, child).?.ast.members;
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for (members) |member|
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try addOutlineNodes(allocator, tree, member, context);
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return;
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},
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else => {},
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}
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try getDocumentSymbolsInternal(allocator, tree, child, context);
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}
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const GetDocumentSymbolsContext = struct {
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symbols: *std.ArrayListUnmanaged(types.DocumentSymbol),
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encoding: offsets.Encoding,
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};
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fn getDocumentSymbolsInternal(allocator: std.mem.Allocator, tree: Ast, node: Ast.Node.Index, context: *GetDocumentSymbolsContext) error{OutOfMemory}!void {
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const name = getDeclName(tree, node) orelse return;
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if (name.len == 0)
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return;
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const range = offsets.nodeToRange(tree, node, context.encoding);
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const tags = tree.nodes.items(.tag);
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(try context.symbols.addOne(allocator)).* = .{
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.name = name,
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.kind = switch (tags[node]) {
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.fn_proto,
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.fn_proto_simple,
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.fn_proto_multi,
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.fn_proto_one,
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.fn_decl,
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=> .Function,
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.local_var_decl,
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.global_var_decl,
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.aligned_var_decl,
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.simple_var_decl,
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=> .Variable,
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.container_field,
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.container_field_align,
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.container_field_init,
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.tagged_union_enum_tag,
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.tagged_union_enum_tag_trailing,
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.tagged_union,
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.tagged_union_trailing,
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.tagged_union_two,
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.tagged_union_two_trailing,
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=> .Field,
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else => .Variable,
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},
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.range = range,
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.selectionRange = range,
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.detail = "",
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.children = ch: {
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var children = std.ArrayListUnmanaged(types.DocumentSymbol){};
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var child_context = GetDocumentSymbolsContext{
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.symbols = &children,
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.encoding = context.encoding,
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};
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var buf: [2]Ast.Node.Index = undefined;
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if (tree.fullContainerDecl(&buf, node)) |container_decl| {
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for (container_decl.ast.members) |child| {
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try addOutlineNodes(allocator, tree, child, &child_context);
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}
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} else if (tree.fullVarDecl(node)) |var_decl| {
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if (var_decl.ast.init_node != 0)
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try addOutlineNodes(allocator, tree, var_decl.ast.init_node, &child_context);
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} else if (tags[node] == .fn_decl) fn_ch: {
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const fn_decl = tree.nodes.items(.data)[node];
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var params: [1]Ast.Node.Index = undefined;
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const fn_proto = tree.fullFnProto(¶ms, fn_decl.lhs).?;
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if (!isTypeFunction(tree, fn_proto)) break :fn_ch;
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const ret_stmt = findReturnStatement(tree, fn_proto, fn_decl.rhs) orelse break :fn_ch;
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const type_decl = tree.nodes.items(.data)[ret_stmt].lhs;
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if (type_decl != 0)
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try addOutlineNodes(allocator, tree, type_decl, &child_context);
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}
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break :ch children.items;
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},
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};
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}
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pub fn getDocumentSymbols(allocator: std.mem.Allocator, tree: Ast, encoding: offsets.Encoding) ![]types.DocumentSymbol {
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var symbols = std.ArrayListUnmanaged(types.DocumentSymbol){};
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try symbols.ensureTotalCapacity(allocator, tree.rootDecls().len);
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var context = GetDocumentSymbolsContext{
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.symbols = &symbols,
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.encoding = encoding,
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};
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for (tree.rootDecls()) |idx| {
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try getDocumentSymbolsInternal(allocator, tree, idx, &context);
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}
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return symbols.items;
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}
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pub const Declaration = union(enum) {
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/// Index of the ast node
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ast_node: Ast.Node.Index,
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241
src/document_symbol.zig
Normal file
241
src/document_symbol.zig
Normal file
@ -0,0 +1,241 @@
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const std = @import("std");
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const types = @import("lsp.zig");
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const offsets = @import("offsets.zig");
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const ast = @import("ast.zig");
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const analysis = @import("analysis.zig");
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const Ast = std.zig.Ast;
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const log = std.log.scoped(.zls_document_symbol);
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const tracy = @import("tracy.zig");
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const Symbol = struct {
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name: []const u8,
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detail: ?[]const u8 = null,
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kind: types.SymbolKind,
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loc: offsets.Loc,
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selection_loc: offsets.Loc,
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children: std.ArrayListUnmanaged(Symbol),
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};
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pub const Context = struct {
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arena: std.mem.Allocator,
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last_var_decl_name: ?[]const u8,
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parent_node: Ast.Node.Index,
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parent_symbols: *std.ArrayListUnmanaged(Symbol),
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total_symbol_count: *usize,
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};
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fn callback(ctx: *Context, tree: Ast, node: Ast.Node.Index) error{OutOfMemory}!void {
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if (node == 0) return;
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const node_tags = tree.nodes.items(.tag);
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const main_tokens = tree.nodes.items(.main_token);
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const token_tags = tree.tokens.items(.tag);
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const decl_name_token = analysis.getDeclNameToken(tree, node);
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const decl_name = analysis.getDeclName(tree, node);
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var new_ctx = ctx.*;
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const maybe_symbol: ?Symbol = switch (node_tags[node]) {
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.global_var_decl,
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.local_var_decl,
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.simple_var_decl,
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.aligned_var_decl,
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=> blk: {
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new_ctx.last_var_decl_name = decl_name;
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if (!ast.isContainer(tree, ctx.parent_node)) break :blk null;
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const kind: types.SymbolKind = switch (token_tags[main_tokens[node]]) {
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.keyword_var => .Variable,
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.keyword_const => .Constant,
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else => unreachable,
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};
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break :blk .{
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.name = decl_name.?,
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.detail = null,
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.kind = kind,
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.loc = offsets.nodeToLoc(tree, node),
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.selection_loc = offsets.tokenToLoc(tree, decl_name_token.?),
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.children = .{},
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};
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},
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.test_decl,
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.fn_decl,
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=> |tag| blk: {
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const kind: types.SymbolKind = switch (tag) {
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.test_decl => .Method, // there is no SymbolKind that represents a tests
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.fn_decl => .Function,
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else => unreachable,
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};
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var buffer: [1]Ast.Node.Index = undefined;
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const detail = if (tree.fullFnProto(&buffer, node)) |fn_info| analysis.getFunctionSignature(tree, fn_info) else null;
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break :blk .{
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.name = decl_name orelse break :blk null,
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.detail = detail,
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.kind = kind,
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.loc = offsets.nodeToLoc(tree, node),
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.selection_loc = offsets.tokenToLoc(tree, decl_name_token.?),
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.children = .{},
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};
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},
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.container_field_init,
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.container_field_align,
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.container_field,
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=> blk: {
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const kind: types.SymbolKind = switch (node_tags[ctx.parent_node]) {
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.root => .Field,
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.container_decl,
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.container_decl_trailing,
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.container_decl_arg,
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.container_decl_arg_trailing,
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.container_decl_two,
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.container_decl_two_trailing,
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=> switch (token_tags[main_tokens[ctx.parent_node]]) {
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.keyword_struct => .Field,
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.keyword_union => .Field,
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.keyword_enum => .EnumMember,
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.keyword_opaque => break :blk null,
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else => unreachable,
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},
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.tagged_union,
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.tagged_union_trailing,
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.tagged_union_enum_tag,
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.tagged_union_enum_tag_trailing,
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.tagged_union_two,
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.tagged_union_two_trailing,
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=> .Field,
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else => unreachable,
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};
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break :blk .{
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.name = decl_name.?,
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.detail = ctx.last_var_decl_name,
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.kind = kind,
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.loc = offsets.nodeToLoc(tree, node),
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.selection_loc = offsets.tokenToLoc(tree, decl_name_token.?),
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.children = .{},
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};
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},
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else => null,
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};
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new_ctx.parent_node = node;
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if (maybe_symbol) |symbol| {
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var symbol_ptr = try ctx.parent_symbols.addOne(ctx.arena);
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symbol_ptr.* = symbol;
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new_ctx.parent_symbols = &symbol_ptr.children;
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ctx.total_symbol_count.* += 1;
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}
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try ast.iterateChildren(tree, node, &new_ctx, error{OutOfMemory}, callback);
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}
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/// a mapping from a source index to a line character pair
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const IndexToPositionEntry = struct {
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output: *types.Position,
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source_index: usize,
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const Self = @This();
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fn lessThan(_: void, lhs: Self, rhs: Self) bool {
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return lhs.source_index < rhs.source_index;
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}
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};
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/// converts `Symbol` to `types.DocumentSymbol`
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fn convertSymbols(
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arena: std.mem.Allocator,
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tree: Ast,
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from: []const Symbol,
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total_symbol_count: usize,
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encoding: offsets.Encoding,
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) error{OutOfMemory}![]types.DocumentSymbol {
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const tracy_zone = tracy.trace(@src());
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defer tracy_zone.end();
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var symbol_buffer = std.ArrayListUnmanaged(types.DocumentSymbol){};
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try symbol_buffer.ensureTotalCapacityPrecise(arena, total_symbol_count);
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// instead of converting every `offsets.Loc` to `types.Range` by calling `offsets.locToRange`
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// we instead store a mapping from source indices to their desired position, sort them by their source index
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// and then iterate through them which avoids having to re-iterate through the source file to find out the line number
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// this reduces algorithmic complexity from `O(file_size*symbol_count)` to `O(symbol_count*log(symbol_count))`
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var mappings = std.ArrayListUnmanaged(IndexToPositionEntry){};
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try mappings.ensureTotalCapacityPrecise(arena, total_symbol_count * 4);
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const result = convertSymbolsInternal(from, &symbol_buffer, &mappings);
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// sort items based on their source position
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std.sort.sort(IndexToPositionEntry, mappings.items, {}, IndexToPositionEntry.lessThan);
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var last_index: usize = 0;
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var last_position: types.Position = .{ .line = 0, .character = 0 };
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for (mappings.items) |mapping| {
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const index = mapping.source_index;
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const position = offsets.advancePosition(tree.source, last_position, last_index, index, encoding);
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defer last_index = index;
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defer last_position = position;
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mapping.output.* = position;
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}
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return result;
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}
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fn convertSymbolsInternal(
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from: []const Symbol,
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symbol_buffer: *std.ArrayListUnmanaged(types.DocumentSymbol),
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mappings: *std.ArrayListUnmanaged(IndexToPositionEntry),
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) []types.DocumentSymbol {
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// aquire storage for exactly `from.len` symbols
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const prev_len = symbol_buffer.items.len;
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symbol_buffer.items.len += from.len;
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const to: []types.DocumentSymbol = symbol_buffer.items[prev_len..];
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for (from, to) |symbol, *out| {
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out.* = .{
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.name = symbol.name,
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.detail = symbol.detail,
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.kind = symbol.kind,
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// will be set later through the mapping below
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.range = undefined,
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.selectionRange = undefined,
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.children = convertSymbolsInternal(symbol.children.items, symbol_buffer, mappings),
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};
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mappings.appendSliceAssumeCapacity(&[4]IndexToPositionEntry{
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.{ .output = &out.range.start, .source_index = symbol.loc.start },
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.{ .output = &out.selectionRange.start, .source_index = symbol.selection_loc.start },
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||||
.{ .output = &out.selectionRange.end, .source_index = symbol.selection_loc.end },
|
||||
.{ .output = &out.range.end, .source_index = symbol.loc.end },
|
||||
});
|
||||
}
|
||||
|
||||
return to;
|
||||
}
|
||||
|
||||
pub fn getDocumentSymbols(
|
||||
arena: std.mem.Allocator,
|
||||
tree: Ast,
|
||||
encoding: offsets.Encoding,
|
||||
) error{OutOfMemory}![]types.DocumentSymbol {
|
||||
const tracy_zone = tracy.trace(@src());
|
||||
defer tracy_zone.end();
|
||||
|
||||
var root_symbols = std.ArrayListUnmanaged(Symbol){};
|
||||
var total_symbol_count: usize = 0;
|
||||
|
||||
var ctx = Context{
|
||||
.arena = arena,
|
||||
.last_var_decl_name = null,
|
||||
.parent_node = 0, // root-node
|
||||
.parent_symbols = &root_symbols,
|
||||
.total_symbol_count = &total_symbol_count,
|
||||
};
|
||||
try ast.iterateChildren(tree, 0, &ctx, error{OutOfMemory}, callback);
|
||||
|
||||
return try convertSymbols(arena, tree, root_symbols.items, ctx.total_symbol_count.*, encoding);
|
||||
}
|
||||
@ -69,53 +69,47 @@ const Builder = struct {
|
||||
};
|
||||
}
|
||||
|
||||
const Item = struct {
|
||||
// a mapping from a source index to a line character pair
|
||||
const IndexToPositionEntry = struct {
|
||||
output: *types.FoldingRange,
|
||||
input: *const FoldingRange,
|
||||
source_index: usize,
|
||||
where: enum { start, end },
|
||||
|
||||
const Self = @This();
|
||||
|
||||
fn getInputIndex(self: Self) usize {
|
||||
return switch (self.where) {
|
||||
.start => self.input.loc.start,
|
||||
.end => self.input.loc.end,
|
||||
};
|
||||
}
|
||||
|
||||
fn lessThan(_: void, lhs: Self, rhs: Self) bool {
|
||||
return lhs.getInputIndex() < rhs.getInputIndex();
|
||||
return lhs.source_index < rhs.source_index;
|
||||
}
|
||||
};
|
||||
|
||||
// one item for every start and end position
|
||||
var items = try builder.allocator.alloc(Item, builder.locations.items.len * 2);
|
||||
defer builder.allocator.free(items);
|
||||
// one mapping for every start and end position
|
||||
var mappings = try builder.allocator.alloc(IndexToPositionEntry, builder.locations.items.len * 2);
|
||||
defer builder.allocator.free(mappings);
|
||||
|
||||
for (builder.locations.items, result_locations, 0..) |*folding_range, *result, i| {
|
||||
items[2 * i + 0] = .{ .output = result, .input = folding_range, .where = .start };
|
||||
items[2 * i + 1] = .{ .output = result, .input = folding_range, .where = .end };
|
||||
mappings[2 * i + 0] = .{ .output = result, .source_index = folding_range.loc.start, .where = .start };
|
||||
mappings[2 * i + 1] = .{ .output = result, .source_index = folding_range.loc.end, .where = .end };
|
||||
}
|
||||
|
||||
// sort items based on their source position
|
||||
std.sort.sort(Item, items, {}, Item.lessThan);
|
||||
// sort mappings based on their source index
|
||||
std.sort.sort(IndexToPositionEntry, mappings, {}, IndexToPositionEntry.lessThan);
|
||||
|
||||
var last_index: usize = 0;
|
||||
var last_position: types.Position = .{ .line = 0, .character = 0 };
|
||||
for (items) |item| {
|
||||
const index = item.getInputIndex();
|
||||
for (mappings) |mapping| {
|
||||
const index = mapping.source_index;
|
||||
const position = offsets.advancePosition(builder.tree.source, last_position, last_index, index, builder.encoding);
|
||||
defer last_index = index;
|
||||
defer last_position = position;
|
||||
|
||||
switch (item.where) {
|
||||
switch (mapping.where) {
|
||||
.start => {
|
||||
item.output.startLine = position.line;
|
||||
item.output.startCharacter = position.character;
|
||||
mapping.output.startLine = position.line;
|
||||
mapping.output.startCharacter = position.character;
|
||||
},
|
||||
.end => {
|
||||
item.output.endLine = position.line;
|
||||
item.output.endCharacter = position.character;
|
||||
mapping.output.endLine = position.line;
|
||||
mapping.output.endCharacter = position.character;
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
@ -7,34 +7,56 @@ const tres = @import("tres");
|
||||
const Context = @import("../context.zig").Context;
|
||||
|
||||
const types = zls.types;
|
||||
const requests = zls.requests;
|
||||
|
||||
const allocator: std.mem.Allocator = std.testing.allocator;
|
||||
|
||||
test "documentSymbol - smoke" {
|
||||
test "documentSymbol - container decl" {
|
||||
try testDocumentSymbol(
|
||||
\\const S = struct {
|
||||
\\ fn f() void {}
|
||||
\\};
|
||||
,
|
||||
\\Variable S
|
||||
\\Constant S
|
||||
\\ Function f
|
||||
);
|
||||
try testDocumentSymbol(
|
||||
\\const S = struct {
|
||||
\\ alpha: u32,
|
||||
\\ fn f() void {}
|
||||
\\};
|
||||
,
|
||||
\\Constant S
|
||||
\\ Field alpha
|
||||
\\ Function f
|
||||
);
|
||||
}
|
||||
|
||||
// FIXME: https://github.com/zigtools/zls/issues/986
|
||||
test "documentSymbol - enum" {
|
||||
try testDocumentSymbol(
|
||||
\\const E = enum {
|
||||
\\ alpha,
|
||||
\\ beta,
|
||||
\\};
|
||||
,
|
||||
\\Constant E
|
||||
\\ EnumMember alpha
|
||||
\\ EnumMember beta
|
||||
);
|
||||
}
|
||||
|
||||
// https://github.com/zigtools/zls/issues/986
|
||||
test "documentSymbol - nested struct with self" {
|
||||
try testDocumentSymbol(
|
||||
\\const Foo = struct {
|
||||
\\ const Self = @This();
|
||||
\\ pub fn foo() !Self {}
|
||||
\\ const Bar = struct {};
|
||||
\\ const Bar = union {};
|
||||
\\};
|
||||
,
|
||||
\\Variable Foo
|
||||
\\ Variable Self
|
||||
\\Constant Foo
|
||||
\\ Constant Self
|
||||
\\ Function foo
|
||||
\\ Variable Bar
|
||||
\\ Constant Bar
|
||||
);
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user