tiny.windowing.InputCapacity

1pub const Capacity = struct {2    retained_pressed_key_count: usize,3    retained_text_codepoint_count: usize,4    pressed_key_bytes: usize,5    text_codepoint_bytes: usize,6    retained_history_bytes: usize,78    pub fn derive(limits: Limits) CapacityError!Capacity {9        if (limits.retained_pressed_key_count == 0) return error.PressedKeyHistoryEmpty;10        if (limits.retained_text_codepoint_count == 0) return error.TextCodepointHistoryEmpty;11        const pressed_key_bytes = std.math.mul(12            usize,13            limits.retained_pressed_key_count,14            @sizeOf(Key),15        ) catch return error.CapacityOverflow;16        const text_codepoint_bytes = std.math.mul(17            usize,18            limits.retained_text_codepoint_count,19            @sizeOf(u21),20        ) catch return error.CapacityOverflow;21        const retained_history_bytes = std.math.add(22            usize,23            pressed_key_bytes,24            text_codepoint_bytes,25        ) catch return error.CapacityOverflow;26        std.debug.assert(pressed_key_bytes / @sizeOf(Key) == limits.retained_pressed_key_count);27        std.debug.assert(28            text_codepoint_bytes / @sizeOf(u21) == limits.retained_text_codepoint_count,29        );30        return .{31            .retained_pressed_key_count = limits.retained_pressed_key_count,32            .retained_text_codepoint_count = limits.retained_text_codepoint_count,33            .pressed_key_bytes = pressed_key_bytes,34            .text_codepoint_bytes = text_codepoint_bytes,35            .retained_history_bytes = retained_history_bytes,36        };37    }38};

1pub const InputCapacity = input_module.Capacity;