% Copyright 2026 Open-Guji (https://github.com/open-guji)
%
% Licensed under the Apache License, Version 2.0 (the "License");
% you may not use this file except in compliance with the License.
% You may obtain a copy of the License at
%
%     http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS,
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
% See the License for the specific language governing permissions and
% limitations under the License.
% luatex-cn-guji-pizhu.sty
% PiZhu (批注) floating annotation support for vertical typesetting
% This is a subpackage of luatex_cn
%
% NOTE: This file must be loaded AFTER TextBox is defined
%
\RequirePackage{expl3}
\RequirePackage{xparse}
\ProvidesExplPackage {guji/luatex-cn-guji-pizhu} {2026/02/18} {0.3.0} {PiZhu Floating Annotation Support}

% PiZhu (批注) - Floating annotation box
\tl_new:N \l__luatexcn_pizhu_font_size_tl
\tl_new:N \l__luatexcn_pizhu_color_tl
\tl_new:N \l__luatexcn_pizhu_grid_width_tl
\tl_new:N \l__luatexcn_pizhu_grid_height_tl
\tl_new:N \l__luatexcn_pizhu_x_tl
\tl_new:N \l__luatexcn_pizhu_y_tl
\tl_new:N \l__luatexcn_pizhu_height_tl

\keys_define:nn { luatexcn / pizhu }
  {
    x .tl_set:N = \l__luatexcn_pizhu_x_tl,
    y .tl_set:N = \l__luatexcn_pizhu_y_tl,
    height .tl_set:N = \l__luatexcn_pizhu_height_tl,
    font-size .tl_set:N = \l__luatexcn_pizhu_font_size_tl,
    font-size .initial:n = {18pt},
    color .tl_set:N = \l__luatexcn_pizhu_color_tl,
    color .initial:n = {1~0~0},
    grid-width .tl_set:N = \l__luatexcn_pizhu_grid_width_tl,
    grid-width .initial:n = {20pt},
    grid-height .tl_set:N = \l__luatexcn_pizhu_grid_height_tl,
    grid-height .initial:n = {19pt},
  }

\NewDocumentCommand{\pizhuSetup}{ m }
  {
    \keys_set:nn { luatexcn / pizhu } { #1 }
  }

\NewDocumentCommand{\PiZhu}{ O{} +m }{%
  \group_begin:
    \keys_set:nn { luatexcn / pizhu } { #1 }
    % Build keyval list with expansion so token list values are expanded
    % Note: border=false ensures pizhu never has border (even if parent context has border)
    \tl_set:Nx \l_tmpa_tl {
      floating=true,
      floating-paper-width=\l__luatexcn_page_paper_width_tl,
      x=\l__luatexcn_pizhu_x_tl,
      y=\l__luatexcn_pizhu_y_tl,
      height=\l__luatexcn_pizhu_height_tl,
      font-color=\exp_not:V \l__luatexcn_pizhu_color_tl,
      font-size=\l__luatexcn_pizhu_font_size_tl,
      grid-width=\l__luatexcn_pizhu_grid_width_tl,
      grid-height=\l__luatexcn_pizhu_grid_height_tl,
      border=false
    }
    % Use \use:x to properly expand the keyval list for xparse optional argument
    \use:x { \exp_not:N \TextBox [\l_tmpa_tl]{\exp_not:n{#2}} }
  \group_end:
}

\ExplSyntaxOff%

% ============================================================================
% CJK Aliases (中文别名)
% ============================================================================
% Simplified Chinese / 简体
\NewCommandCopy{\批注}{\PiZhu}
\NewCommandCopy{\批注设置}{\pizhuSetup}
% Traditional Chinese / 繁体
\NewCommandCopy{\批注設置}{\pizhuSetup}

% ============================================================
% Chinese key aliases / 中文 Key 别名
% ============================================================
\ExplSyntaxOn
\keys_define:nn { luatexcn / pizhu }
  {
    % 简体
    横位 .tl_set:N = \l__luatexcn_pizhu_x_tl,
    纵位 .tl_set:N = \l__luatexcn_pizhu_y_tl,
    高度 .tl_set:N = \l__luatexcn_pizhu_height_tl,
    字号 .tl_set:N = \l__luatexcn_pizhu_font_size_tl,
    颜色 .tl_set:N = \l__luatexcn_pizhu_color_tl,
    格宽 .tl_set:N = \l__luatexcn_pizhu_grid_width_tl,
    格高 .tl_set:N = \l__luatexcn_pizhu_grid_height_tl,
    % 繁体（与简体不同形的）
    橫位 .tl_set:N = \l__luatexcn_pizhu_x_tl,
    縱位 .tl_set:N = \l__luatexcn_pizhu_y_tl,
    字號 .tl_set:N = \l__luatexcn_pizhu_font_size_tl,
    顏色 .tl_set:N = \l__luatexcn_pizhu_color_tl,
    格寬 .tl_set:N = \l__luatexcn_pizhu_grid_width_tl,
  }
\ExplSyntaxOff

\endinput%