Add interactive move/resize operations using configurable pointer bindings (Mod4+BTN_LEFT to move, Mod4+BTN_RIGHT to resize). Tiled windows automatically float when dragged or resized. Add keyboard commands for floating windows: - move_up/down/left/right: move by pixel amount - resize_width/height: resize by pixel amount - swap_next/swap_prev: swap position in window stack Fix float dimension initialization when windows first become floating, and fix clamp crash when resizing windows larger than output bounds. Update example config with documented keybinds and new pointer_binds block.
590 lines
25 KiB
Zig
590 lines
25 KiB
Zig
// SPDX-FileCopyrightText: 2026 Ben Buhse <me@benbuhse.email>
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//
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// SPDX-License-Identifier: GPL-3.0-or-later
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const Config = @This();
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const CONFIG_FILE = "beansprout/config.kdl";
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/// Width of window borders in pixels
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border_width: u8 = 2,
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/// Color of focused window's border in 0xRRGGBBAA or 0xRRGGBB form
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border_color_focused: RiverColor = utils.parseRgbaComptime("0x89b4fa"),
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/// Color of unfocused windows' borders in 0xRRGGBBAA or 0xRRGGBB form
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border_color_unfocused: RiverColor = utils.parseRgbaComptime("0x1e1e2e"),
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/// Where a new window should attach, top or bottom of the stack
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attach_mode: AttachMode = .top,
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/// Should focus change when the cursor moves onto a new window
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focus_follows_pointer: bool = true,
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/// Should the pointer warp to the center of newly-focused windows
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pointer_warp_on_focus_change: bool = true,
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/// Tag bind entries parsed from config (tag_bind nodes in keybinds block)
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tag_binds: std.ArrayList(Keybind) = .{},
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keybinds: std.ArrayList(Keybind) = .{},
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pointer_binds: std.ArrayList(PointerBind) = .{},
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pub const Keybind = struct {
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modifiers: river.SeatV1.Modifiers,
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command: XkbBindings.Command,
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keysym: ?xkbcommon.Keysym,
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};
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pub const PointerBind = struct {
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modifiers: river.SeatV1.Modifiers,
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button: u32, // Linux button code (BTN_LEFT=0x110, BTN_RIGHT=0x111, BTN_MIDDLE=0x112)
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action: PointerAction,
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};
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pub const PointerAction = enum {
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move_window,
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resize_window,
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};
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pub const AttachMode = enum {
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top,
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bottom,
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};
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const NodeName = enum {
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attach_mode,
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focus_follows_pointer,
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pointer_warp_on_focus_change,
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borders,
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keybinds,
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pointer_binds,
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};
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const BorderNodeName = enum {
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width,
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color_focused,
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color_unfocused,
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};
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const PointerBindNodeName = enum {
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move_window,
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resize_window,
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};
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// We can just directly use the tag type from Command as our node name
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const KeybindNodeName = @typeInfo(XkbBindings.Command).@"union".tag_type.?;
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pub fn create() !*Config {
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var config: *Config = try utils.allocator.create(Config);
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errdefer config.destroy();
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config.* = .{}; // create() gives us undefined memory
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if (try known_folders.getPath(utils.allocator, .local_configuration)) |config_dir| blk: {
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defer utils.allocator.free(config_dir);
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const config_path = try std.fmt.allocPrint(utils.allocator, "{s}/{s}", .{ config_dir, CONFIG_FILE });
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defer utils.allocator.free(config_path);
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const file = fs.openFileAbsolute(config_path, .{}) catch break :blk;
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var read_buffer: [1024]u8 = undefined;
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var file_reader = file.reader(&read_buffer);
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config.load(&file_reader.interface) catch |err| {
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log.err("Error while loading config: {s}. Continuing with default config", .{@errorName(err)});
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// Free any partially-loaded state and reset to defaults
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for (config.keybinds.items) |keybind| {
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switch (keybind.command) {
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.spawn => |argv| {
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for (argv) |arg| utils.allocator.free(arg);
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utils.allocator.free(argv);
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},
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else => {},
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}
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}
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config.keybinds.clearAndFree(utils.allocator);
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config.tag_binds.clearAndFree(utils.allocator);
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config.pointer_binds.clearAndFree(utils.allocator);
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config.* = .{};
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};
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}
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return config;
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}
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pub fn destroy(config: *Config) void {
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for (config.keybinds.items) |keybind| {
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switch (keybind.command) {
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.spawn => |argv| {
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for (argv) |arg| utils.allocator.free(arg);
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utils.allocator.free(argv);
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},
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else => {},
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}
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}
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config.keybinds.deinit(utils.allocator);
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config.tag_binds.deinit(utils.allocator);
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config.pointer_binds.deinit(utils.allocator);
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utils.allocator.destroy(config);
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}
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// TODO: Support kdl properties to specific the hostname the config should affect
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fn load(config: *Config, reader: *Io.Reader) !void {
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var parser = try kdl.Parser.init(utils.allocator, reader, .{});
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defer parser.deinit(utils.allocator);
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var next_child_block: ?NodeName = null;
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// Parse the KDL config
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while (try parser.next()) |event| {
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// First, we switch on the type of event
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switch (event) {
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.node => |node| {
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if (next_child_block) |child_block| {
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logWarnMissingChildBlock(child_block);
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next_child_block = null;
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}
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// If it's a node, we check if it's a valid NodeName
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const node_name = std.meta.stringToEnum(NodeName, node.name);
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if (node_name) |name| {
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// Next, we have to check the specifics for the NodeName
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switch (name) {
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.attach_mode => {
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const attach_mode_str = utils.stripQuotes(node.arg(&parser, 0) orelse "");
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if (std.meta.stringToEnum(AttachMode, attach_mode_str)) |mode| {
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config.attach_mode = mode;
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logDebugSettingNode(name, attach_mode_str);
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} else {
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logWarnInvalidNodeArg(name, attach_mode_str);
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continue;
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}
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},
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.focus_follows_pointer => {
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const focus_follows_pointer_str = utils.stripQuotes(node.arg(&parser, 0) orelse "");
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if (boolFromKdlStr(focus_follows_pointer_str)) |focus_follows_pointer| {
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config.focus_follows_pointer = focus_follows_pointer;
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logDebugSettingNode(name, focus_follows_pointer_str);
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} else {
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logWarnInvalidNodeArg(name, focus_follows_pointer_str);
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continue;
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}
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},
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.pointer_warp_on_focus_change => {
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const pointer_warp_on_focus_change_str = utils.stripQuotes(node.arg(&parser, 0) orelse "");
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if (boolFromKdlStr(pointer_warp_on_focus_change_str)) |pointer_warp_on_focus_change| {
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config.pointer_warp_on_focus_change = pointer_warp_on_focus_change;
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logDebugSettingNode(name, pointer_warp_on_focus_change_str);
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} else {
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logWarnInvalidNodeArg(name, pointer_warp_on_focus_change_str);
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continue;
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}
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},
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.borders => {
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next_child_block = .borders;
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},
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.keybinds => {
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next_child_block = .keybinds;
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},
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.pointer_binds => {
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next_child_block = .pointer_binds;
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},
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}
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} else {
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logWarnInvalidNode(node.name);
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}
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},
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.child_block_begin => {
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if (next_child_block) |child_block| {
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switch (child_block) {
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.borders => try config.loadBordersChildBlock(&parser),
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.keybinds => try config.loadKeybindsChildBlock(&parser),
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.pointer_binds => try config.loadPointerBindsChildBlock(&parser),
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else => {
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// Nothing else should ever be marked as a next_child_block
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unreachable;
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},
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}
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next_child_block = null;
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} else {
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try config.skipChildBlock(&parser);
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}
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},
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.child_block_end => log.err("Reached unexpected .child_block_end. Ignoring it", .{}),
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}
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}
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}
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fn loadBordersChildBlock(config: *Config, parser: *kdl.Parser) !void {
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while (try parser.next()) |event| {
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switch (event) {
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.node => |node| {
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// If it's a node, we check if it's a valid NodeName
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const node_name = std.meta.stringToEnum(BorderNodeName, node.name);
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if (node_name) |name| {
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switch (name) {
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.width => {
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const width_str = utils.stripQuotes(node.arg(parser, 0) orelse "");
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config.border_width = fmt.parseInt(u8, width_str, 10) catch {
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logWarnInvalidNodeArg(name, width_str);
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continue;
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};
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logDebugSettingNode(name, width_str);
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},
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.color_focused => {
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const color_str = utils.stripQuotes(node.arg(parser, 0) orelse "");
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config.border_color_focused = utils.parseRgba(color_str) catch {
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logWarnInvalidNodeArg(name, color_str);
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continue;
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};
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logDebugSettingNode(name, color_str);
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},
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.color_unfocused => {
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const color_str = utils.stripQuotes(node.arg(parser, 0) orelse "");
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config.border_color_unfocused = utils.parseRgba(color_str) catch {
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logWarnInvalidNodeArg(name, color_str);
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continue;
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};
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logDebugSettingNode(name, color_str);
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},
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}
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} else {
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logWarnInvalidNode(node.name);
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}
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},
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.child_block_begin => {
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// borders should never have a nested child block
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try config.skipChildBlock(parser);
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},
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.child_block_end => {
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// Done parsing the borders block; return
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return;
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},
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}
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}
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}
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fn loadKeybindsChildBlock(config: *Config, parser: *kdl.Parser) !void {
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while (try parser.next()) |event| {
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switch (event) {
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.node => |node| {
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// tag_bind is a special case node name
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if (mem.eql(u8, node.name, "tag_bind")) {
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const mod_str = utils.stripQuotes(node.arg(parser, 0) orelse {
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log.warn("tag_bind: missing modifier argument. Ignoring", .{});
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continue;
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});
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const cmd_str = utils.stripQuotes(node.arg(parser, 1) orelse {
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log.warn("tag_bind: missing command argument. Ignoring", .{});
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continue;
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});
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const modifiers = try utils.parseModifiers(mod_str) orelse {
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log.warn("tag_bind: invalid modifiers \"{s}\". Ignoring", .{mod_str});
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continue;
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};
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const command_tag_type = std.meta.stringToEnum(KeybindNodeName, cmd_str) orelse {
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log.warn("tag_bind: invalid command \"{s}\". Ignoring", .{cmd_str});
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continue;
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};
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const command: XkbBindings.Command = switch (command_tag_type) {
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// We can set these to "0" since they're not used (when in the tag_bind node)
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.set_output_tags => .{ .set_output_tags = 0 },
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.set_window_tags => .{ .set_window_tags = 0 },
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.toggle_output_tags => .{ .toggle_output_tags = 0 },
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.toggle_window_tags => .{ .toggle_window_tags = 0 },
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else => {
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log.warn("tag_bind: invalid command \"{s}\". Only tag-keybinds can be used with tag_binds. Ignoring", .{cmd_str});
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continue;
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},
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};
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try config.tag_binds.append(utils.allocator, .{
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.modifiers = modifiers,
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.command = command,
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.keysym = null, // Tag binds don't need a keysym (automatically 1-9)
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});
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// TODO: Make a logger for keybind settings
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log.debug("tag_bind: {s} {s}", .{ mod_str, cmd_str });
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continue;
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}
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// Handle the rest of the possiblities like all the other types of block
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const node_name = std.meta.stringToEnum(KeybindNodeName, node.name);
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if (node_name) |name| {
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// All nodes should have at least a command, modifiers, and a keysym
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// Some may have more arguments handled in the switch
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const mod_str = utils.stripQuotes(node.arg(parser, 0) orelse {
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logWarnMissingNodeArg(name, "modifier(s)");
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continue;
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});
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const modifiers = try utils.parseModifiers(mod_str) orelse {
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log.warn("keybinds: invalid modifiers \"{s}\". Ignoring", .{mod_str});
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continue;
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};
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const key_str = utils.stripQuotes(node.arg(parser, 1) orelse {
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logWarnMissingNodeArg(name, "keysym");
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continue;
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});
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// Keysym.fromName() needs a [*:0]const u8
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const z = try utils.allocator.dupeZ(u8, key_str);
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defer utils.allocator.free(z);
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const keysym = xkbcommon.Keysym.fromName(z, .case_insensitive);
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const command: XkbBindings.Command = sw: switch (name) {
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.spawn => {
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// TODO: Add propert(ies) to support ENV vars
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const exec_str = utils.stripQuotes(node.arg(parser, 2) orelse {
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logWarnMissingNodeArg(name, "command");
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continue;
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});
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const split_exec = try utils.tokenizeToOwnedSlices(exec_str, ' ');
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break :sw .{ .spawn = split_exec };
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},
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.change_ratio => {
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const diff_str = utils.stripQuotes(node.arg(parser, 2) orelse {
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logWarnMissingNodeArg(name, "diff");
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continue;
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});
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const diff = fmt.parseFloat(f32, diff_str) catch {
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logWarnInvalidNodeArg(name, diff_str);
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continue;
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};
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break :sw .{ .change_ratio = diff };
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},
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inline .focus_next_window,
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.focus_prev_window,
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.focus_next_output,
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.focus_prev_output,
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.send_to_next_output,
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.send_to_prev_output,
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.toggle_float,
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.zoom,
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.reload_config,
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.toggle_fullscreen,
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.close_window,
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.increment_primary_count,
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.decrement_primary_count,
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.swap_next,
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.swap_prev,
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=> |cmd| {
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// None of these have arguments, just create the union and give it back
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break :sw @unionInit(XkbBindings.Command, @tagName(cmd), {});
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},
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inline .move_up,
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.move_down,
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.move_left,
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.move_right,
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.resize_width,
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.resize_height,
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=> |cmd| {
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const amount_str = utils.stripQuotes(node.arg(parser, 2) orelse {
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logWarnMissingNodeArg(name, "amount");
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continue;
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});
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const amount = fmt.parseInt(i32, amount_str, 0) catch {
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logWarnInvalidNodeArg(name, amount_str);
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continue;
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};
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break :sw @unionInit(XkbBindings.Command, @tagName(cmd), amount);
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},
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inline .set_output_tags, .set_window_tags, .toggle_output_tags, .toggle_window_tags => |cmd| {
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const tags_str = utils.stripQuotes(node.arg(parser, 2) orelse {
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logWarnMissingNodeArg(name, "tags");
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continue;
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});
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const tags = fmt.parseInt(u32, tags_str, 0) catch {
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logWarnInvalidNodeArg(name, tags_str);
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continue;
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};
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break :sw @unionInit(XkbBindings.Command, @tagName(cmd), tags);
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},
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};
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try config.keybinds.append(utils.allocator, .{
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.modifiers = modifiers,
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.command = command,
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.keysym = keysym,
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});
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} else {
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logWarnInvalidNode(node.name);
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}
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},
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.child_block_begin => {
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// keybinds should never have a nested child block
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try config.skipChildBlock(parser);
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},
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.child_block_end => {
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// Done parsing the keybinds block; return
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return;
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},
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}
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}
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}
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fn loadPointerBindsChildBlock(config: *Config, parser: *kdl.Parser) !void {
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while (try parser.next()) |event| {
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switch (event) {
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.node => |node| {
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const node_name = std.meta.stringToEnum(PointerBindNodeName, node.name);
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if (node_name) |name| {
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// Parse modifiers (arg 0)
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const mod_str = utils.stripQuotes(node.arg(parser, 0) orelse {
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logWarnMissingNodeArg(name, "modifier(s)");
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continue;
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});
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const modifiers = try utils.parseModifiers(mod_str) orelse {
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logWarnInvalidNodeArg(name, mod_str);
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continue;
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};
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// Parse button (arg 1)
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const button_str = utils.stripQuotes(node.arg(parser, 1) orelse {
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logWarnMissingNodeArg(name, "button");
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continue;
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});
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const button = parseButton(button_str) orelse {
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logWarnInvalidNodeArg(name, button_str);
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continue;
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};
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const action: PointerAction = switch (name) {
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.move_window => .move_window,
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.resize_window => .resize_window,
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};
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try config.pointer_binds.append(utils.allocator, .{
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.modifiers = modifiers,
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.button = button,
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.action = action,
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});
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log.debug("pointer_binds.{s}: {s} {s}", .{ @tagName(name), mod_str, button_str });
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} else {
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logWarnInvalidNode(node.name);
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}
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},
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.child_block_begin => {
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try config.skipChildBlock(parser);
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},
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.child_block_end => {
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return;
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},
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}
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}
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}
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fn parseButton(s: []const u8) ?u32 {
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// Support both numeric and named buttons
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var lower_buf: [16]u8 = undefined;
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const len = @min(s.len, 16);
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const lower = std.ascii.lowerString(lower_buf[0..len], s[0..len]);
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if (mem.eql(u8, lower, "btn_left") or mem.eql(u8, lower, "button1")) {
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return 0x110; // BTN_LEFT = 272
|
|
} else if (mem.eql(u8, lower, "btn_right") or mem.eql(u8, lower, "button3")) {
|
|
return 0x111; // BTN_RIGHT = 273
|
|
} else if (mem.eql(u8, lower, "btn_middle") or mem.eql(u8, lower, "button2")) {
|
|
return 0x112; // BTN_MIDDLE = 274
|
|
}
|
|
|
|
// Try parsing as hex or decimal
|
|
return fmt.parseInt(u32, s, 0) catch null;
|
|
}
|
|
|
|
/// Skips an entire child block including any nested child blocks
|
|
fn skipChildBlock(_: *Config, parser: *kdl.Parser) !void {
|
|
log.warn("Unexpected child block. Skipping it", .{});
|
|
|
|
var depth: usize = 0;
|
|
while (try parser.next()) |event| {
|
|
switch (event) {
|
|
// Nested child block
|
|
.child_block_begin => depth += 1,
|
|
.child_block_end => {
|
|
if (depth == 0) {
|
|
return;
|
|
} else {
|
|
depth -= 1;
|
|
}
|
|
},
|
|
else => {
|
|
// We don't care about any nodes in here
|
|
},
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Convert a KDL argument into a bool
|
|
///
|
|
/// if arg_str in ["#true", "true"], return true
|
|
/// if arg_str in ["#false", "false"], return false
|
|
/// else, return null
|
|
fn boolFromKdlStr(arg_str: []const u8) ?bool {
|
|
if (mem.eql(u8, arg_str, "#true") or
|
|
mem.eql(u8, arg_str, "true"))
|
|
{
|
|
return true;
|
|
} else if (mem.eql(u8, arg_str, "#false") or
|
|
mem.eql(u8, arg_str, "false"))
|
|
{
|
|
return false;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
fn logWarnInvalidNodeArg(node_name: anytype, node_value: []const u8) void {
|
|
const node_name_type = @TypeOf(node_name);
|
|
switch (node_name_type) {
|
|
NodeName => log.warn("Invalid \"{s}\" ({s}). Using default value", .{ @tagName(node_name), node_value }),
|
|
BorderNodeName => log.warn("Invalid \"border.{s}\" ({s}). Using default value", .{ @tagName(node_name), node_value }),
|
|
KeybindNodeName => log.warn("Invalid \"keybind.{s}\" ({s}). Ignoring", .{ @tagName(node_name), node_value }),
|
|
PointerBindNodeName => log.warn("Invalid \"pointer_binds.{s}\" ({s}). Ignoring", .{ @tagName(node_name), node_value }),
|
|
else => @compileError("This function does not (yet) support type \"" ++ @typeName(node_name_type) ++ "\""),
|
|
}
|
|
}
|
|
|
|
fn logWarnMissingNodeArg(node_name: anytype, comptime arg: []const u8) void {
|
|
const node_name_type = @TypeOf(node_name);
|
|
switch (node_name_type) {
|
|
KeybindNodeName => log.warn("\"keybind.{s}\" missing " ++ arg ++ " argument. Ignoring", .{@tagName(node_name)}),
|
|
PointerBindNodeName => log.warn("\"pointer_binds.{s}\" missing " ++ arg ++ " argument. Ignoring", .{@tagName(node_name)}),
|
|
else => @compileError("This function does not (yet) support type \"" ++ @typeName(node_name_type) ++ "\""),
|
|
}
|
|
}
|
|
|
|
fn logWarnInvalidNode(node_name: []const u8) void {
|
|
log.warn("Invalid KDL node {s}. Ignoring it and carrying on", .{node_name});
|
|
}
|
|
|
|
fn logWarnMissingChildBlock(child_block: anytype) void {
|
|
const child_block_type = @TypeOf(child_block);
|
|
switch (child_block_type) {
|
|
NodeName => log.warn("Expected child block for {s}, but got another node instead. Continuing but ignoring {s}", .{ @tagName(child_block), @tagName(child_block) }),
|
|
else => @compileError("This function does not (yet) support type \"" ++ @typeName(child_block_type) ++ "\""),
|
|
}
|
|
}
|
|
|
|
fn logDebugSettingNode(node_name: anytype, node_value: []const u8) void {
|
|
const node_name_type = @TypeOf(node_name);
|
|
switch (node_name_type) {
|
|
NodeName => log.debug("Setting {s} to {s}", .{ @tagName(node_name), node_value }),
|
|
BorderNodeName => log.debug("Setting border.{s} to {s}", .{ @tagName(node_name), node_value }),
|
|
else => @compileError("This function does not (yet) support type \"" ++ @typeName(@TypeOf(node_name)) ++ "\""),
|
|
}
|
|
}
|
|
|
|
const std = @import("std");
|
|
const fmt = std.fmt;
|
|
const fs = std.fs;
|
|
const mem = std.mem;
|
|
const Io = std.Io;
|
|
|
|
const wayland = @import("wayland");
|
|
const river = wayland.client.river;
|
|
|
|
const kdl = @import("kdl");
|
|
const known_folders = @import("known_folders");
|
|
const xkbcommon = @import("xkbcommon");
|
|
|
|
const utils = @import("utils.zig");
|
|
const RiverColor = utils.RiverColor;
|
|
const XkbBindings = @import("XkbBindings.zig");
|
|
|
|
const log = std.log.scoped(.Config);
|