rules: rename "tag" action to "tags"

This rule action accepts and assigns a set of 32 tags represented as a
32 bit integer just like all of river's other commands handling tags.

Using the singular here is potentially misleading and is also
inconsistent with set-view-tags, etc. which all use the plural.

Sorry about the breaking change for those who use master branch, ideally
I would have caught this before merging but at least I noticed before a
release.

This commit also does a bit of internal refactoring/cleanup of the rules
system.

6 files changed, 66 insertions, 85 deletions

diff --git a/doc/riverctl.1.scd b/doc/riverctl.1.scd
index f3704fe..b43678b 100644
--- a/doc/riverctl.1.scd
+++ b/doc/riverctl.1.scd
@@ -289,7 +289,7 @@ matches everything while _\*\*_ and the empty string are invalid.
 	  and existing views.
 	- *csd*: Use client-side decorations for the view. Applies to new
 	  and existing views.
-	- *tag*: Set the initial tags of the view. Requires the tags as
+	- *tags*: Set the initial tags of the view. Requires the tags as
 	  an argument. Applies only to new views.
 	- *output*: Set the initial output of the view. Requires the output
 	  as an argument. Applies only to new views. The output can be specified
@@ -339,7 +339,7 @@ matches everything while _\*\*_ and the empty string are invalid.
 *rule-del* [*-app-id* _glob_|*-title* _glob_] _action_
 	Delete a rule created using *rule-add* with the given arguments.
 
-*list-rules* *float*|*ssd*|*tag*|*position*|*dimensions*|*fullscreen*
+*list-rules* *float*|*ssd*|*tags*|*position*|*dimensions*|*fullscreen*
 	Print the specified rule list. The output is ordered from most specific
 	to least specific, the same order in which views are checked against
 	when searching for a match. Only the first matching rule in the list
diff --git a/river/Config.zig b/river/Config.zig
index a765d54..34336a7 100644
--- a/river/Config.zig
+++ b/river/Config.zig
@@ -87,13 +87,15 @@ mode_to_id: std.StringHashMap(u32),
 /// All user-defined keymap modes, indexed by mode id
 modes: std.ArrayListUnmanaged(Mode),
 
-float_rules: RuleList(bool) = .{},
-ssd_rules: RuleList(bool) = .{},
-tag_rules: RuleList(u32) = .{},
-output_rules: RuleList([]const u8) = .{},
-position_rules: RuleList(Position) = .{},
-dimensions_rules: RuleList(Dimensions) = .{},
-fullscreen_rules: RuleList(bool) = .{},
+rules: struct {
+    float: RuleList(bool) = .{},
+    ssd: RuleList(bool) = .{},
+    tags: RuleList(u32) = .{},
+    output: RuleList([]const u8) = .{},
+    position: RuleList(Position) = .{},
+    dimensions: RuleList(Dimensions) = .{},
+    fullscreen: RuleList(bool) = .{},
+} = .{},
 
 /// The selected focus_follows_cursor mode
 focus_follows_cursor: FocusFollowsCursorMode = .disabled,
@@ -167,16 +169,16 @@ pub fn deinit(self: *Self) void {
     for (self.modes.items) |*mode| mode.deinit();
     self.modes.deinit(util.gpa);
 
-    self.float_rules.deinit();
-    self.ssd_rules.deinit();
-    self.tag_rules.deinit();
-    for (self.output_rules.rules.items) |rule| {
+    self.rules.float.deinit();
+    self.rules.ssd.deinit();
+    self.rules.tags.deinit();
+    for (self.rules.output.rules.items) |rule| {
         util.gpa.free(rule.value);
     }
-    self.output_rules.deinit();
-    self.position_rules.deinit();
-    self.dimensions_rules.deinit();
-    self.fullscreen_rules.deinit();
+    self.rules.output.deinit();
+    self.rules.position.deinit();
+    self.rules.dimensions.deinit();
+    self.rules.fullscreen.deinit();
 
     util.gpa.free(self.default_layout_namespace);
 
@@ -185,7 +187,7 @@ pub fn deinit(self: *Self) void {
 }
 
 pub fn outputRuleMatch(self: *Self, view: *View) !?*Output {
-    const output_name = self.output_rules.match(view) orelse return null;
+    const output_name = self.rules.output.match(view) orelse return null;
     var it = server.root.active_outputs.iterator(.forward);
     while (it.next()) |output| {
         const wlr_output = output.wlr_output;
diff --git a/river/View.zig b/river/View.zig
index bd4935d..e4ea30d 100644
--- a/river/View.zig
+++ b/river/View.zig
@@ -485,19 +485,19 @@ pub fn map(view: *Self) !void {
 
     view.foreign_toplevel_handle.map();
 
-    if (server.config.float_rules.match(view)) |float| {
+    if (server.config.rules.float.match(view)) |float| {
         view.pending.float = float;
     }
-    if (server.config.fullscreen_rules.match(view)) |fullscreen| {
+    if (server.config.rules.fullscreen.match(view)) |fullscreen| {
         view.pending.fullscreen = fullscreen;
     }
-    if (server.config.ssd_rules.match(view)) |ssd| {
+    if (server.config.rules.ssd.match(view)) |ssd| {
         view.pending.ssd = ssd;
     }
 
     const focused_output = server.input_manager.defaultSeat().focused_output;
     if (try server.config.outputRuleMatch(view) orelse focused_output) |output| {
-        if (server.config.position_rules.match(view)) |position| {
+        if (server.config.rules.position.match(view)) |position| {
             view.pending.box.x = position.x;
             view.pending.box.y = position.y;
         } else {
@@ -506,13 +506,13 @@ pub fn map(view: *Self) !void {
             view.pending.box.y = @divTrunc(@max(0, output.usable_box.height - view.pending.box.height), 2);
         }
 
-        if (server.config.dimensions_rules.match(view)) |dimensions| {
+        if (server.config.rules.dimensions.match(view)) |dimensions| {
             view.pending.box.width = dimensions.width;
             view.pending.box.height = dimensions.height;
         }
 
         view.pending.tags = blk: {
-            if (server.config.tag_rules.match(view)) |tags| break :blk tags;
+            if (server.config.rules.tags.match(view)) |tags| break :blk tags;
             const tags = output.pending.tags & server.config.spawn_tagmask;
             break :blk if (tags != 0) tags else output.pending.tags;
         };
diff --git a/river/XdgDecoration.zig b/river/XdgDecoration.zig
index bfc133c..f43f5e9 100644
--- a/river/XdgDecoration.zig
+++ b/river/XdgDecoration.zig
@@ -42,7 +42,7 @@ pub fn init(wlr_decoration: *wlr.XdgToplevelDecorationV1) void {
     wlr_decoration.events.destroy.add(&decoration.destroy);
     wlr_decoration.events.request_mode.add(&decoration.request_mode);
 
-    const ssd = server.config.ssd_rules.match(xdg_toplevel.view) orelse
+    const ssd = server.config.rules.ssd.match(xdg_toplevel.view) orelse
         (decoration.wlr_decoration.requested_mode != .client_side);
 
     // TODO(wlroots): make sure this is properly batched in a single configure
@@ -81,7 +81,7 @@ fn handleRequestMode(
     const xdg_toplevel: *XdgToplevel = @ptrFromInt(decoration.wlr_decoration.surface.data);
     const view = xdg_toplevel.view;
 
-    const ssd = server.config.ssd_rules.match(xdg_toplevel.view) orelse
+    const ssd = server.config.rules.ssd.match(xdg_toplevel.view) orelse
         (decoration.wlr_decoration.requested_mode != .client_side);
 
     if (view.pending.ssd != ssd) {
diff --git a/river/XwaylandView.zig b/river/XwaylandView.zig
index b717aff..8fd3be1 100644
--- a/river/XwaylandView.zig
+++ b/river/XwaylandView.zig
@@ -285,7 +285,7 @@ fn handleSetDecorations(listener: *wl.Listener(*wlr.XwaylandSurface), _: *wlr.Xw
     const self = @fieldParentPtr(Self, "set_decorations", listener);
     const view = self.view;
 
-    const ssd = server.config.ssd_rules.match(view) orelse
+    const ssd = server.config.rules.ssd.match(view) orelse
         !self.xwayland_surface.decorations.no_border;
 
     if (view.pending.ssd != ssd) {
diff --git a/river/command/rule.zig b/river/command/rule.zig
index 0104fad..fc90cc3 100644
--- a/river/command/rule.zig
+++ b/river/command/rule.zig
@@ -32,7 +32,7 @@ const Action = enum {
     @"no-float",
     ssd,
     csd,
-    tag,
+    tags,
     output,
     position,
     dimensions,
@@ -54,7 +54,7 @@ pub fn ruleAdd(_: *Seat, args: []const [:0]const u8, _: *?[]const u8) Error!void
 
     const positional_arguments_count: u8 = switch (action) {
         .float, .@"no-float", .ssd, .csd, .fullscreen, .@"no-fullscreen" => 1,
-        .tag, .output => 2,
+        .tags, .output => 2,
         .position, .dimensions => 3,
     };
     if (result.args.len > positional_arguments_count) return Error.TooManyArguments;
@@ -68,14 +68,14 @@ pub fn ruleAdd(_: *Seat, args: []const [:0]const u8, _: *?[]const u8) Error!void
 
     switch (action) {
         .float, .@"no-float" => {
-            try server.config.float_rules.add(.{
+            try server.config.rules.float.add(.{
                 .app_id_glob = app_id_glob,
                 .title_glob = title_glob,
                 .value = (action == .float),
             });
         },
         .ssd, .csd => {
-            try server.config.ssd_rules.add(.{
+            try server.config.rules.ssd.add(.{
                 .app_id_glob = app_id_glob,
                 .title_glob = title_glob,
                 .value = (action == .ssd),
@@ -83,18 +83,18 @@ pub fn ruleAdd(_: *Seat, args: []const [:0]const u8, _: *?[]const u8) Error!void
             apply_ssd_rules();
             server.root.applyPending();
         },
-        .tag => {
-            const tag = try fmt.parseInt(u32, result.args[1], 10);
-            try server.config.tag_rules.add(.{
+        .tags => {
+            const tags = try fmt.parseInt(u32, result.args[1], 10);
+            try server.config.rules.tags.add(.{
                 .app_id_glob = app_id_glob,
                 .title_glob = title_glob,
-                .value = tag,
+                .value = tags,
             });
         },
         .output => {
             const output_name = try util.gpa.dupe(u8, result.args[1]);
             errdefer util.gpa.free(output_name);
-            try server.config.output_rules.add(.{
+            try server.config.rules.output.add(.{
                 .app_id_glob = app_id_glob,
                 .title_glob = title_glob,
                 .value = output_name,
@@ -103,7 +103,7 @@ pub fn ruleAdd(_: *Seat, args: []const [:0]const u8, _: *?[]const u8) Error!void
         .position => {
             const x = try fmt.parseInt(u31, result.args[1], 10);
             const y = try fmt.parseInt(u31, result.args[2], 10);
-            try server.config.position_rules.add(.{
+            try server.config.rules.position.add(.{
                 .app_id_glob = app_id_glob,
                 .title_glob = title_glob,
                 .value = .{
@@ -115,7 +115,7 @@ pub fn ruleAdd(_: *Seat, args: []const [:0]const u8, _: *?[]const u8) Error!void
         .dimensions => {
             const width = try fmt.parseInt(u31, result.args[1], 10);
             const height = try fmt.parseInt(u31, result.args[2], 10);
-            try server.config.dimensions_rules.add(.{
+            try server.config.rules.dimensions.add(.{
                 .app_id_glob = app_id_glob,
                 .title_glob = title_glob,
                 .value = .{
@@ -125,7 +125,7 @@ pub fn ruleAdd(_: *Seat, args: []const [:0]const u8, _: *?[]const u8) Error!void
             });
         },
         .fullscreen, .@"no-fullscreen" => {
-            try server.config.fullscreen_rules.add(.{
+            try server.config.rules.fullscreen.add(.{
                 .app_id_glob = app_id_glob,
                 .title_glob = title_glob,
                 .value = (action == .fullscreen),
@@ -153,29 +153,29 @@ pub fn ruleDel(_: *Seat, args: []const [:0]const u8, _: *?[]const u8) Error!void
     };
     switch (action) {
         .float, .@"no-float" => {
-            _ = server.config.float_rules.del(rule);
+            _ = server.config.rules.float.del(rule);
         },
         .ssd, .csd => {
-            _ = server.config.ssd_rules.del(rule);
+            _ = server.config.rules.ssd.del(rule);
             apply_ssd_rules();
             server.root.applyPending();
         },
-        .tag => {
-            _ = server.config.tag_rules.del(rule);
+        .tags => {
+            _ = server.config.rules.tags.del(rule);
         },
         .output => {
-            if (server.config.output_rules.del(rule)) |output_rule| {
+            if (server.config.rules.output.del(rule)) |output_rule| {
                 util.gpa.free(output_rule);
             }
         },
         .position => {
-            _ = server.config.position_rules.del(rule);
+            _ = server.config.rules.position.del(rule);
         },
         .dimensions => {
-            _ = server.config.dimensions_rules.del(rule);
+            _ = server.config.rules.dimensions.del(rule);
         },
         .fullscreen, .@"no-fullscreen" => {
-            _ = server.config.fullscreen_rules.del(rule);
+            _ = server.config.rules.fullscreen.del(rule);
         },
     }
 }
@@ -183,7 +183,7 @@ pub fn ruleDel(_: *Seat, args: []const [:0]const u8, _: *?[]const u8) Error!void
 fn apply_ssd_rules() void {
     var it = server.root.views.iterator(.forward);
     while (it.next()) |view| {
-        if (server.config.ssd_rules.match(view)) |ssd| {
+        if (server.config.rules.ssd.match(view)) |ssd| {
             view.pending.ssd = ssd;
         }
     }
@@ -193,23 +193,17 @@ pub fn listRules(_: *Seat, args: []const [:0]const u8, out: *?[]const u8) Error!
     if (args.len < 2) return error.NotEnoughArguments;
     if (args.len > 2) return error.TooManyArguments;
 
-    const list = std.meta.stringToEnum(enum {
+    const rule_list = std.meta.stringToEnum(enum {
         float,
         ssd,
-        tag,
+        tags,
         output,
         position,
         dimensions,
         fullscreen,
     }, args[1]) orelse return Error.UnknownOption;
-    const max_glob_len = switch (list) {
-        .float => server.config.float_rules.getMaxGlobLen(),
-        .ssd => server.config.ssd_rules.getMaxGlobLen(),
-        .tag => server.config.tag_rules.getMaxGlobLen(),
-        .output => server.config.output_rules.getMaxGlobLen(),
-        .position => server.config.position_rules.getMaxGlobLen(),
-        .dimensions => server.config.dimensions_rules.getMaxGlobLen(),
-        .fullscreen => server.config.fullscreen_rules.getMaxGlobLen(),
+    const max_glob_len = switch (rule_list) {
+        inline else => |list| @field(server.config.rules, @tagName(list)).getMaxGlobLen(),
     };
     const app_id_column_max = 2 + @max("app-id".len, max_glob_len.app_id);
     const title_column_max = 2 + @max("title".len, max_glob_len.title);
@@ -221,11 +215,13 @@ pub fn listRules(_: *Seat, args: []const [:0]const u8, out: *?[]const u8) Error!
     try fmt.formatBuf("app-id", .{ .width = app_id_column_max, .alignment = .left }, writer);
     try writer.writeAll("action\n");
 
-    switch (list) {
-        .float, .ssd => {
+    switch (rule_list) {
+        inline .float, .ssd, .output, .fullscreen => |list| {
             const rules = switch (list) {
-                .float => server.config.float_rules.rules.items,
-                .ssd => server.config.ssd_rules.rules.items,
+                .float => server.config.rules.float.rules.items,
+                .ssd => server.config.rules.ssd.rules.items,
+                .output => server.config.rules.output.rules.items,
+                .fullscreen => server.config.rules.fullscreen.rules.items,
                 else => unreachable,
             };
             for (rules) |rule| {
@@ -234,50 +230,33 @@ pub fn listRules(_: *Seat, args: []const [:0]const u8, out: *?[]const u8) Error!
                 try writer.print("{s}\n", .{switch (list) {
                     .float => if (rule.value) "float" else "no-float",
                     .ssd => if (rule.value) "ssd" else "csd",
+                    .output => rule.value,
+                    .fullscreen => if (rule.value) "fullscreen" else "no-fullscreen",
                     else => unreachable,
                 }});
             }
         },
-        .tag => {
-            const rules = server.config.tag_rules.rules.items;
-            for (rules) |rule| {
+        .tags => {
+            for (server.config.rules.tags.rules.items) |rule| {
                 try fmt.formatBuf(rule.title_glob, .{ .width = title_column_max, .alignment = .left }, writer);
                 try fmt.formatBuf(rule.app_id_glob, .{ .width = app_id_column_max, .alignment = .left }, writer);
                 try writer.print("{b}\n", .{rule.value});
             }
         },
-        .output => {
-            const rules = server.config.output_rules.rules.items;
-            for (rules) |rule| {
-                try fmt.formatBuf(rule.title_glob, .{ .width = title_column_max, .alignment = .left }, writer);
-                try fmt.formatBuf(rule.app_id_glob, .{ .width = app_id_column_max, .alignment = .left }, writer);
-                try writer.print("{s}\n", .{rule.value});
-            }
-        },
         .position => {
-            const rules = server.config.position_rules.rules.items;
-            for (rules) |rule| {
+            for (server.config.rules.position.rules.items) |rule| {
                 try fmt.formatBuf(rule.title_glob, .{ .width = title_column_max, .alignment = .left }, writer);
                 try fmt.formatBuf(rule.app_id_glob, .{ .width = app_id_column_max, .alignment = .left }, writer);
                 try writer.print("{d},{d}\n", .{ rule.value.x, rule.value.y });
             }
         },
         .dimensions => {
-            const rules = server.config.dimensions_rules.rules.items;
-            for (rules) |rule| {
+            for (server.config.rules.dimensions.rules.items) |rule| {
                 try fmt.formatBuf(rule.title_glob, .{ .width = title_column_max, .alignment = .left }, writer);
                 try fmt.formatBuf(rule.app_id_glob, .{ .width = app_id_column_max, .alignment = .left }, writer);
                 try writer.print("{d}x{d}\n", .{ rule.value.width, rule.value.height });
             }
         },
-        .fullscreen => {
-            const rules = server.config.fullscreen_rules.rules.items;
-            for (rules) |rule| {
-                try fmt.formatBuf(rule.title_glob, .{ .width = title_column_max, .alignment = .left }, writer);
-                try fmt.formatBuf(rule.app_id_glob, .{ .width = app_id_column_max, .alignment = .left }, writer);
-                try writer.print("{s}\n", .{if (rule.value) "fullscreen" else "no-fullscreen"});
-            }
-        },
     }
 
     out.* = try buffer.toOwnedSlice();