feat: configure editor completion triggers from LSP info

src/git.zig

@@ -275,11 +275,11 @@ pub fn rev_parse(context_: usize, rev: []const u8, file_path: []const u8) Error!
 
 pub fn cat_file(context_: usize, object: []const u8) Error!void {
     const tag = @src().fn_name;
-    try git_err(context_, .{ "cat-file", "-p", object }, struct {
+    try git(context_, .{ "cat-file", "-p", object }, struct {
         fn result(context: usize, parent: tp.pid_ref, output: []const u8) void {
             parent.send(.{ module_name, context, tag, output }) catch {};
         }
-    }.result, log_err, exit_null(tag));
+    }.result, exit_null(tag));
 }
 
 fn git_line_output(context_: usize, comptime tag: []const u8, cmd: anytype) Error!void {

src/tui/editor.zig

@@ -542,9 +542,8 @@ pub const Editor = struct {
             tp.extract_cbor(&cursels_cbor),
         }))
             return error.RestoreStateMatch;
-        self.insert_triggers.deinit(self.allocator);
+        self.clear_event_triggers();
         self.insert_triggers = .fromOwnedSlice(insert_triggers);
-        self.delete_triggers.deinit(self.allocator);
         self.delete_triggers = .fromOwnedSlice(delete_triggers);
         self.refresh_tab_width();
         if (op == .open_file)
@@ -614,8 +613,7 @@ pub const Editor = struct {
         for (self.diagnostics.items) |*d| d.deinit(self.allocator);
         self.diagnostics.deinit(self.allocator);
         self.completions.deinit(self.allocator);
-        self.insert_triggers.deinit(self.allocator);
-        self.delete_triggers.deinit(self.allocator);
+        self.clear_event_triggers();
         if (self.syntax) |syn| syn.destroy(tui.query_cache());
         self.cancel_all_tabstops();
         self.cursels.deinit(self.allocator);
@@ -6234,9 +6232,31 @@ pub const Editor = struct {
         };
     }
 
+    fn clear_event_triggers(self: *Self) void {
+        self.insert_triggers.deinit(self.allocator);
+        self.delete_triggers.deinit(self.allocator);
+        self.insert_triggers = .empty;
+        self.delete_triggers = .empty;
+    }
+
+    pub fn update_completion_triggers(self: *Self) void {
+        self.clear_event_triggers();
+        if (self.file_type) |ft| if (ft.language_server) |ls| if (ls.len > 0) {
+            const lsp_arg0 = ls[0];
+            const info = (tui.mainview() orelse return).lsp_info.table.get(lsp_arg0) orelse return;
+            self.add_completion_triggers(info.trigger_characters.items);
+        };
+    }
+
     fn add_default_symbol_triggers(self: *Self) void {
+        const chars: []const []const u8 = &.{"."};
+        self.add_completion_triggers(chars);
+    }
+
+    fn add_completion_triggers(self: *Self, triggers: []const []const u8) void {
         const id = command.get_name_id("completion");
-        self.add_symbol_trigger('.', id, .insert) catch {};
+        for (triggers) |char| if (char.len > 0)
+            self.add_symbol_trigger(char[0], id, .insert) catch {};
     }
 
     pub fn add_symbol_trigger(self: *Self, char: u8, command_: command.ID, event: TriggerEvent) error{OutOfMemory}!void {

src/tui/lsp_info.zig

@@ -0,0 +1,93 @@
+allocator: std.mem.Allocator,
+table: Table,
+
+const Table = std.StringHashMapUnmanaged(Info);
+
+pub const Info = struct {
+    trigger_characters: std.ArrayList([]const u8) = .empty,
+};
+
+pub fn init(allocator: std.mem.Allocator) @This() {
+    return .{
+        .allocator = allocator,
+        .table = .empty,
+    };
+}
+
+pub fn deinit(self: *@This()) void {
+    var iter = self.table.iterator();
+    while (iter.next()) |item| {
+        for (item.value_ptr.trigger_characters.items) |char|
+            self.allocator.free(char);
+        item.value_ptr.trigger_characters.deinit(self.allocator);
+        self.allocator.free(item.key_ptr.*);
+    }
+    self.table.deinit(self.allocator);
+}
+
+pub fn add_from_event(self: *@This(), cbor_buf: []const u8) error{ InvalidTriggersArray, OutOfMemory }!void {
+    var iter = cbor_buf;
+    var project: []const u8 = undefined;
+    var lsp_arg0: []const u8 = undefined;
+    var trigger_characters: []const u8 = undefined;
+    if (!(cbor.matchValue(&iter, .{
+        cbor.any,
+        cbor.any,
+        cbor.extract(&project),
+        .{ cbor.extract(&lsp_arg0), cbor.more },
+        cbor.extract_cbor(&trigger_characters),
+    }) catch return)) return;
+    const value = try self.add(lsp_arg0, &trigger_characters);
+    std.log.debug("{s} triggers: {any}", .{ lsp_arg0, value.trigger_characters.items });
+}
+
+pub fn add(self: *@This(), lsp_arg0: []const u8, iter: *[]const u8) error{ InvalidTriggersArray, OutOfMemory }!*Info {
+    const key = try self.allocator.dupe(u8, lsp_arg0);
+    errdefer self.allocator.free(key);
+
+    const p = try self.table.getOrPut(self.allocator, key);
+    const value = p.value_ptr;
+    if (p.found_existing) {
+        for (value.trigger_characters.items) |char|
+            self.allocator.free(char);
+        value.trigger_characters.clearRetainingCapacity();
+    } else {
+        value.* = .{};
+    }
+
+    var len = cbor.decodeArrayHeader(iter) catch return error.InvalidTriggersArray;
+    while (len > 0) : (len -= 1) {
+        var char: []const u8 = undefined;
+        if (!(cbor.matchValue(iter, cbor.extract(&char)) catch return error.InvalidTriggersArray)) return error.InvalidTriggersArray;
+        (try value.trigger_characters.addOne(self.allocator)).* = try self.allocator.dupe(u8, char);
+    }
+    return value;
+}
+
+pub fn write_state(self: *@This(), writer: *std.Io.Writer) error{WriteFailed}!void {
+    try cbor.writeArrayHeader(writer, self.table.count());
+    var iter = self.table.iterator();
+    while (iter.next()) |item| {
+        try cbor.writeArrayHeader(writer, 2);
+        try cbor.writeValue(writer, item.key_ptr.*);
+        try cbor.writeArrayHeader(writer, item.value_ptr.trigger_characters.items.len);
+        for (item.value_ptr.trigger_characters.items) |char| try cbor.writeValue(writer, char);
+    }
+}
+
+pub fn extract_state(self: *@This(), iter: *[]const u8) error{ InvalidTriggersArray, OutOfMemory }!void {
+    var lsp_arg0: []const u8 = undefined;
+    var trigger_characters: []const u8 = undefined;
+    var len = cbor.decodeArrayHeader(iter) catch return;
+    while (len > 0) : (len -= 1) {
+        if (cbor.matchValue(iter, .{ cbor.extract(&lsp_arg0), cbor.extract_cbor(&trigger_characters) }) catch false) {
+            const value = try self.add(lsp_arg0, &trigger_characters);
+            std.log.debug("restored {s} triggers: {any}", .{ lsp_arg0, value.trigger_characters.items });
+        } else {
+            cbor.skipValue(iter) catch return error.InvalidTriggersArray;
+        }
+    }
+}
+
+const std = @import("std");
+const cbor = @import("cbor");

src/tui/mainview.zig

@@ -27,6 +27,7 @@ const WidgetList = @import("WidgetList.zig");
 const WidgetStack = @import("WidgetStack.zig");
 const ed = @import("editor.zig");
 const home = @import("home.zig");
+const LspInfo = @import("lsp_info.zig");
 
 const logview = @import("logview.zig");
 const filelist_view = @import("filelist_view.zig");
@@ -61,6 +62,7 @@ panel_height: ?usize = null,
 symbols: std.ArrayListUnmanaged(u8) = .empty,
 symbols_complete: bool = true,
 closing_project: bool = false,
+lsp_info: LspInfo,
 
 const FileListType = enum {
     diagnostics,
@@ -85,6 +87,7 @@ pub fn create(allocator: std.mem.Allocator) CreateError!Widget {
         .panes = undefined,
         .panes_widget = undefined,
         .buffer_manager = Buffer.Manager.init(allocator),
+        .lsp_info = .init(allocator),
     };
     try self.commands.init(self);
     const w = Widget.to(self);
@@ -126,6 +129,7 @@ pub fn deinit(self: *Self, allocator: std.mem.Allocator) void {
     self.symbols.deinit(allocator);
     self.floating_views.deinit();
     self.buffer_manager.deinit();
+    self.lsp_info.deinit();
     allocator.destroy(self);
 }
 
@@ -1773,6 +1777,8 @@ pub fn write_state(self: *Self, writer: *std.Io.Writer) WriteStateError!void {
     if (self.widgets.get("tabs")) |tabs_widget|
         if (tabs_widget.dynamic_cast(@import("status/tabs.zig").TabBar)) |tabs|
             try tabs.write_state(writer);
+
+    self.lsp_info.write_state(writer) catch return error.WriteFailed;
 }
 
 fn read_restore_info(self: *Self) !void {
@@ -1850,6 +1856,9 @@ fn extract_state(self: *Self, iter: *[]const u8, mode: enum { no_project, with_p
                 logger.print_err("mainview", "failed to restore tabs: {}", .{e});
     logger.print("restored tabs ({d} bytes)", .{prev_len - iter.len});
 
+    self.lsp_info.extract_state(iter) catch |e|
+        logger.print_err("mainview", "failed to restore LSP info: {}", .{e});
+
     const buffers = try self.buffer_manager.list_unordered(self.allocator);
     defer self.allocator.free(buffers);
     for (buffers) |buffer| if (!buffer.is_ephemeral())
@@ -1985,3 +1994,9 @@ pub fn vcs_content_update(self: *Self, m: tp.message) void {
             editor.vcs_content_update() catch {};
     }
 }
+
+pub fn trigger_characters_update(self: *Self, m: tp.message) void {
+    self.lsp_info.add_from_event(m.buf) catch return;
+    const editor = self.get_active_editor() orelse return;
+    editor.update_completion_triggers();
+}

src/tui/tui.zig

@@ -533,6 +533,9 @@ fn receive_safe(self: *Self, from: tp.pid_ref, m: tp.message) !void {
     if (try m.match(.{ "PRJ", "vcs_content", tp.more }))
         return if (mainview()) |mv| mv.vcs_content_update(m);
 
+    if (try m.match(.{ "PRJ", "triggerCharacters", tp.more }))
+        return if (mainview()) |mv| mv.trigger_characters_update(m);
+
     if (try m.match(.{ "PRJ", tp.more })) // drop late project manager query responses
         return;