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core: add support for bindings with multiple parameters

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This commit adds support for bindings with multiple parameters. For
example, a "resize_split" binding will have two parameters: the resize
direction and the resize amount. Multiple parameters are supported by
using a tuple as the enum value and are written in string form by
separating each argument with a comma. Example: "resize_split:up,10".
This commit is contained in:
Gregory Anders
2023-11-05 19:48:52 -06:00
parent 3b2799ce97
commit e7745dc820
1 changed files with 52 additions and 29 deletions
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81
src/input/Binding.zig
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@ -234,6 +234,50 @@ pub const Action = union(enum) {
hide,
};
fn parseEnum(comptime T: type, value: []const u8) !T {
return std.meta.stringToEnum(T, value) orelse return Error.InvalidFormat;
}
fn parseInt(comptime T: type, value: []const u8) !T {
return std.fmt.parseInt(T, value, 10) catch return Error.InvalidFormat;
}
fn parseFloat(comptime T: type, value: []const u8) !T {
return std.fmt.parseFloat(T, value) catch return Error.InvalidFormat;
}
fn parseParameter(
comptime field: std.builtin.Type.UnionField,
param: []const u8,
) !field.type {
return switch (@typeInfo(field.type)) {
.Enum => try parseEnum(field.type, param),
.Int => try parseInt(field.type, param),
.Float => try parseFloat(field.type, param),
.Struct => |info| blk: {
// Only tuples are supported to avoid ambiguity with field
// ordering
comptime assert(info.is_tuple);
var it = std.mem.split(u8, param, ",");
var value: field.type = undefined;
inline for (info.fields) |field_| {
const next = it.next() orelse return Error.InvalidFormat;
@field(value, field_.name) = switch (@typeInfo(field_.type)) {
.Enum => try parseEnum(field_.type, next),
.Int => try parseInt(field_.type, next),
.Float => try parseFloat(field_.type, next),
else => unreachable,
};
}
break :blk value;
},
else => unreachable,
};
}
/// Parse an action in the format of "key=value" where key is the
/// action name and value is the action parameter. The parameter
/// is optional depending on the action.
@ -266,35 +310,14 @@ pub const Action = union(enum) {
// Cursor keys can't be set currently
Action.CursorKey => return Error.InvalidAction,
else => switch (@typeInfo(field.type)) {
.Enum => {
const idx = colonIdx orelse return Error.InvalidFormat;
const param = input[idx + 1 ..];
const value = std.meta.stringToEnum(
field.type,
param,
) orelse return Error.InvalidFormat;
return @unionInit(Action, field.name, value);
},
.Int => {
const idx = colonIdx orelse return Error.InvalidFormat;
const param = input[idx + 1 ..];
const value = std.fmt.parseInt(field.type, param, 10) catch
return Error.InvalidFormat;
return @unionInit(Action, field.name, value);
},
.Float => {
const idx = colonIdx orelse return Error.InvalidFormat;
const param = input[idx + 1 ..];
const value = std.fmt.parseFloat(field.type, param) catch
return Error.InvalidFormat;
return @unionInit(Action, field.name, value);
},
else => unreachable,
else => {
const idx = colonIdx orelse return Error.InvalidFormat;
const param = input[idx + 1 ..];
return @unionInit(
Action,
field.name,
try parseParameter(field, param),
);
},
}
}