% 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-textbox.sty
% TextBox support for vertical typesetting
% This is a subpackage of luatex_cn
%
% NOTE: This file must be loaded AFTER luatexcn/vertical keys are defined
%
\RequirePackage{core/luatex-cn-core-base}
\RequirePackage{expl3}
\RequirePackage{xparse}
\ProvidesExplPackage {core/luatex-cn-core-textbox} {2026/02/18} {0.3.0} {TextBox Support for Vertical Typesetting}

% Grid Textbox Command (Simplified for Single Column)
% Syntax: \GridTextbox[height=N, fill=true/false]{content}
% height is in grid units (integers), width is always 1
% Key-value interface for \GridTextbox
\bool_new:N \l__luatexcn_textbox_border_bool
\tl_new:N \l__luatexcn_textbox_box_align_tl
\tl_new:N \l__luatexcn_textbox_inner_gw_tl
\tl_new:N \l__luatexcn_textbox_inner_gh_tl
\dim_new:N \l__luatexcn_textbox_inner_gw_dim
\dim_new:N \l__luatexcn_textbox_inner_gh_dim
\bool_new:N \l__luatexcn_textbox_floating_bool
\tl_new:N \l__luatexcn_textbox_x_tl
\tl_new:N \l__luatexcn_textbox_y_tl
\tl_new:N \l__luatexcn_textbox_bg_color_tl
\tl_new:N \l__luatexcn_textbox_font_color_tl
\tl_new:N \l__luatexcn_textbox_bg_rgb_tl
\tl_new:N \l__luatexcn_textbox_font_rgb_tl
\tl_new:N \l__luatexcn_textbox_font_size_tl
\tl_new:N \l__luatexcn_textbox_floating_paper_width_tl
\tl_new:N \l__luatexcn_textbox_border_shape_tl
\tl_new:N \l__luatexcn_textbox_border_color_tl
\tl_new:N \l__luatexcn_textbox_border_width_tl
\tl_new:N \l__luatexcn_textbox_border_margin_tl
\tl_new:N \l__luatexcn_textbox_border_rgb_tl
\bool_new:N \l__luatexcn_textbox_outer_border_bool
\tl_new:N \l__luatexcn_textbox_outer_border_thickness_tl
\tl_new:N \l__luatexcn_textbox_outer_border_sep_tl

\keys_define:nn { luatexcn / textbox }
  {
    height .tl_set:N = \l__luatexcn_textbox_height_tl,
    height .initial:n = 0,
    n-cols .int_set:N = \l__luatexcn_textbox_n_cols_int,
    n-cols .initial:n = 0,
    outer-cols .int_set:N = \l__luatexcn_textbox_outer_cols_int,
    outer-cols .initial:n = 0,
    fill .bool_set:N = \l__luatexcn_textbox_distribute_bool,
    fill .initial:n = false,
    box-align .tl_set:N = \l__luatexcn_textbox_box_align_tl,
    box-align .initial:n = {top},
    border .bool_set:N = \l__luatexcn_textbox_border_bool,
    border .initial:n = false,
    banxin .bool_set:N = \l__luatexcn_textbox_banxin_bool,
    column-align .tl_set:N = \l__luatexcn_textbox_col_align_tl,
    column-align .initial:n = {},
    % debug key removed - use global \LtcDebugOn

    vertical-align .tl_set:N = \l__luatexcn_textbox_box_align_tl,
    floating .bool_set:N = \l__luatexcn_textbox_floating_bool,
    floating .initial:n = false,
    floating-paper-width .tl_set:N = \l__luatexcn_textbox_floating_paper_width_tl,
    floating-paper-width .initial:n = 0pt,
    x .tl_set:N = \l__luatexcn_textbox_x_tl,
    x .initial:n = 0pt,
    y .tl_set:N = \l__luatexcn_textbox_y_tl,
    y .initial:n = 0pt,
    background-color .tl_set:N = \l__luatexcn_textbox_bg_color_tl,
    background-color .initial:n = {},
    font-color .tl_set:N = \l__luatexcn_textbox_font_color_tl,
    font-color .initial:n = {},
    font-size .tl_set:N = \l__luatexcn_textbox_font_size_tl,
    font-size .initial:n = {},
    grid-width .tl_set:N = \l__luatexcn_textbox_inner_gw_tl,
    grid-width .initial:n = {},
    grid-height .tl_set:N = \l__luatexcn_textbox_inner_gh_tl,
    grid-height .initial:n = {},
    % Border shape parameters (rect/octagon/circle)
    border-shape .tl_set:N = \l__luatexcn_textbox_border_shape_tl,
    border-shape .initial:n = {none},
    border-color .tl_set:N = \l__luatexcn_textbox_border_color_tl,
    border-color .initial:n = {},
    border-width .tl_set:N = \l__luatexcn_textbox_border_width_tl,
    border-width .initial:n = {0.4pt},
    border-margin .tl_set:N = \l__luatexcn_textbox_border_margin_tl,
    border-margin .initial:n = {0pt},
    outer-border .bool_set:N = \l__luatexcn_textbox_outer_border_bool,
    outer-border .initial:n = false,
    outer-border-thickness .tl_set:N = \l__luatexcn_textbox_outer_border_thickness_tl,
    outer-border-thickness .initial:n = {1pt},
    outer-border-sep .tl_set:N = \l__luatexcn_textbox_outer_border_sep_tl,
    outer-border-sep .initial:n = {2pt},
  }

\NewDocumentCommand{\TextBox}{ O{} +m }
  {
    \group_begin:
    % Inherit debug setting from global environment
    % No local override anymore
    \keys_set:nn { luatexcn / textbox } { #1 }
    % Width is always 1 for outer layout (textbox occupies 1 column externally)
    \setluatexattribute\cnverticaltextboxwidth{1}

    % Calculate inner grid width via Lua (replaces TeX-side decision tree)
    \dim_set:Nn \l__luatexcn_textbox_inner_gw_dim {
      \lua_now:e {
        local ~ tb = require('core.luatex-cn-core-textbox')
        tex.print(tostring(tb.calc_inner_grid_width({
          inner_gw =
            \tl_if_empty:NTF \l__luatexcn_textbox_inner_gw_tl
              { 0 }
              { \dim_to_decimal_in_sp:n { \l__luatexcn_textbox_inner_gw_tl } },
          column_width = \dim_to_decimal_in_sp:n { \g__luatexcn_column_current_width_dim },
          outer_cols = \int_use:N \l__luatexcn_textbox_outer_cols_int,
          n_cols = \int_use:N \l__luatexcn_textbox_n_cols_int,
          content_gw = \dim_to_decimal_in_sp:n { \l__luatexcn_content_grid_width_tl },
        })))
      } sp
    }
    \tl_if_empty:NTF \l__luatexcn_textbox_inner_gh_tl
      { \dim_set:Nn \l__luatexcn_textbox_inner_gh_dim { \l__luatexcn_content_grid_height_tl } }
      { \dim_set:Nn \l__luatexcn_textbox_inner_gh_dim { \l__luatexcn_textbox_inner_gh_tl } }

    % Capture content in a box and process it via Lua for inner verticality
    \vbox_set:Nn \l_tmpa_box {
      \setluatexattribute\cnverticaltextboxwidth{0}
      \setluatexattribute\cnverticaltextboxheight{0}
      % Note: indent is inherited from style stack (no longer reset here)
      % Reset paragraph spacing to prevent unwanted glues in grid layout
      \dim_set:Nn \l_tmpa_dim { \l__luatexcn_content_grid_height_tl }
      % Scale font size
      \tl_if_empty:NTF \l__luatexcn_textbox_font_size_tl
        {
          % Default auto-scaling for multi-column boxes
          \int_compare:nNnT \l__luatexcn_textbox_n_cols_int > 1
            {
              \dim_set:Nn \l_tmpa_dim { \l__luatexcn_textbox_inner_gw_dim * 85 / 100 }
              \fontsize{\l_tmpa_dim}{\l__luatexcn_textbox_inner_gw_dim}\selectfont
            }
        }
        {
          % User-specified font size
          \dim_set:Nn \l_tmpa_dim { \l__luatexcn_textbox_font_size_tl }
          \fontsize{\l_tmpa_dim}{\l_tmpa_dim}\selectfont
        }
    % Inner line length: if height specified, constrain it; otherwise use max for auto-sizing
    \tl_if_empty:NTF \l__luatexcn_textbox_height_tl
      { \dim_set_eq:NN \hsize \c_max_dim }
      {
        \exp_args:NnV \regex_match:nnTF { [^0-9\.] } \l__luatexcn_textbox_height_tl
          { \dim_set:Nn \hsize { \l__luatexcn_textbox_height_tl } }
          { \dim_set:Nn \hsize { \l__luatexcn_textbox_inner_gh_dim * \l__luatexcn_textbox_height_tl } }
      }
    #2
    }

    % Expand variables to ensure they contain the color string, not a macro name
    % Use o-expansion to preserve spaces (standard x-expansion strips them in ExplSyntax)
    \tl_set:No \l__luatexcn_textbox_bg_color_tl { \l__luatexcn_textbox_bg_color_tl }
    \tl_set:No \l__luatexcn_textbox_font_color_tl { \l__luatexcn_textbox_font_color_tl }

    % Convert background color to RGB
    \cs_if_exist:cTF { color @ \l__luatexcn_textbox_bg_color_tl }
      {
        \exp_args:NV \extractcolorspec \l__luatexcn_textbox_bg_color_tl \l_tmpa_tl
        \exp_args:NNx \convertcolorspec \l_tmpa_tl { rgb } \l_tmpb_tl
        \tl_set:Nx \l__luatexcn_textbox_bg_rgb_tl { \l_tmpb_tl }
      }
      { \tl_set_eq:NN \l__luatexcn_textbox_bg_rgb_tl \l__luatexcn_textbox_bg_color_tl }
    \tl_replace_all:Nnn \l__luatexcn_textbox_bg_rgb_tl { , } { ~ }

    % Convert font color to RGB
    \cs_if_exist:cTF { color @ \l__luatexcn_textbox_font_color_tl }
      {
        \exp_args:NV \extractcolorspec \l__luatexcn_textbox_font_color_tl \l_tmpa_tl
        \exp_args:NNx \convertcolorspec \l_tmpa_tl { rgb } \l_tmpb_tl
        \tl_set:Nx \l__luatexcn_textbox_font_rgb_tl { \l_tmpb_tl }
      }
      { \tl_set_eq:NN \l__luatexcn_textbox_font_rgb_tl \l__luatexcn_textbox_font_color_tl }
    \tl_replace_all:Nnn \l__luatexcn_textbox_font_rgb_tl { , } { ~ }

    % Convert border color to RGB
    \tl_set:No \l__luatexcn_textbox_border_color_tl { \l__luatexcn_textbox_border_color_tl }
    \cs_if_exist:cTF { color @ \l__luatexcn_textbox_border_color_tl }
      {
        \exp_args:NV \extractcolorspec \l__luatexcn_textbox_border_color_tl \l_tmpa_tl
        \exp_args:NNx \convertcolorspec \l_tmpa_tl { rgb } \l_tmpb_tl
        \tl_set:Nx \l__luatexcn_textbox_border_rgb_tl { \l_tmpb_tl }
      }
      { \tl_set_eq:NN \l__luatexcn_textbox_border_rgb_tl \l__luatexcn_textbox_border_color_tl }
    \tl_replace_all:Nnn \l__luatexcn_textbox_border_rgb_tl { , } { ~ }

    % Setup textbox params in _G.textbox (parsed once, used in Lua)
    \lua_now:e {
      vertical_textbox.setup({
        column_aligns~=~[=[\luaescapestring{\tl_use:N~\l__luatexcn_textbox_col_align_tl}]=],
        floating~=~\bool_if:NTF~\l__luatexcn_textbox_floating_bool~{true}~{false},
        floating_x~=~[=[\luaescapestring{\l__luatexcn_textbox_x_tl}]=],
        floating_y~=~[=[\luaescapestring{\l__luatexcn_textbox_y_tl}]=],
        floating_paper_width~=~[=[\luaescapestring{\l__luatexcn_textbox_floating_paper_width_tl}]=],
        outer_grid_height~=~\dim_to_decimal_in_sp:n { \l__luatexcn_content_grid_height_tl }
      })
    }

    \lua_now:e {vertical_textbox.process_inner_box(\int_value:w~\l_tmpa_box,~{
      n_cols~=~\int_use:N~\l__luatexcn_textbox_n_cols_int,
      outer_cols~=~\int_use:N~\l__luatexcn_textbox_outer_cols_int,
      height~=~[=[\luaescapestring{\tl_use:N \l__luatexcn_textbox_height_tl}]=],
      grid_width~=~\dim_to_decimal_in_sp:n { \l__luatexcn_textbox_inner_gw_dim },
      grid_height~=~\dim_to_decimal_in_sp:n { \l__luatexcn_textbox_inner_gh_dim },
      box_align~=~"\luaescapestring{\tl_use:N~\l__luatexcn_textbox_box_align_tl}",
      border~=~"\bool_if:NTF~\l__luatexcn_textbox_border_bool~{true}{false}",
      background_color~=~[=[\l__luatexcn_textbox_bg_rgb_tl]=],
      font_color~=~[=[\l__luatexcn_textbox_font_rgb_tl]=],
      font_size~=~[=[\luaescapestring{\l__luatexcn_textbox_font_size_tl}]=],
      border_shape~=~"\luaescapestring{\tl_use:N~\l__luatexcn_textbox_border_shape_tl}",
      border_color~=~[=[\l__luatexcn_textbox_border_rgb_tl]=],
      border_width~=~[=[\luaescapestring{\l__luatexcn_textbox_border_width_tl}]=],
      border_margin~=~[=[\luaescapestring{\l__luatexcn_textbox_border_margin_tl}]=],
      outer_border~=~\bool_if:NTF~\l__luatexcn_textbox_outer_border_bool~{true}{false},
      outer_border_thickness~=~[=[\luaescapestring{\l__luatexcn_textbox_outer_border_thickness_tl}]=],
      outer_border_sep~=~[=[\luaescapestring{\l__luatexcn_textbox_outer_border_sep_tl}]=]
    }) }
    \setluatexattribute\cnverticaltextboxwidth{0}
    \setluatexattribute\cnverticaltextboxheight{0}
    \bool_if:NTF \l__luatexcn_textbox_floating_bool
      {
        \lua_now:e { vertical_textbox.register_floating_box(\int_value:w~\l_tmpa_box,~{
          x~=~[=[\luaescapestring{\l__luatexcn_textbox_x_tl}]=],
          y~=~[=[\luaescapestring{\l__luatexcn_textbox_y_tl}]=]
        }) }
      }
      {
        \mode_leave_vertical: \box_use:N \l_tmpa_box
      }
    \group_end:
  }

% 填充文本框 - Backwards compatible: accepts either integer (old syntax) or key-value options (new syntax)
\NewDocumentCommand{\FillTextBox}{ O{} +m }
  {%
    \tl_set:Nn \l_tmpa_tl { #1 }
    \regex_match:nnTF { ^[0-9]+$ } { #1 }
      { \TextBox[height=#1, box-align=fill]{#2} }  % Old syntax: just an integer height
      { \TextBox[#1, box-align=fill]{#2} }          % New syntax: key-value options
  }

\ExplSyntaxOff%

% ============================================================
% Chinese aliases / 中文别名
% ============================================================
% Border shape shortcuts
\NewDocumentCommand{\反白}{ m }{\TextBox[background-color={0.2 0.2 0.2}, font-color=white]{#1}}
\NewDocumentCommand{\八角框}{ m }{\TextBox[border-shape=octagon]{#1}}
\NewDocumentCommand{\带圈}{ m }{\TextBox[border-shape=circle]{#1}}
\NewDocumentCommand{\反白八角框}{ m }{\TextBox[background-color={0.2 0.2 0.2}, font-color=white, border-shape=octagon, border-color=white]{#1}}
% Simplified Chinese / 简体
\NewCommandCopy{\文本框}{\TextBox}
\NewCommandCopy{\填充文本框}{\FillTextBox}
% English aliases for Chinese-only commands
\NewCommandCopy{\inverted}{\反白}
\NewCommandCopy{\octagon}{\八角框}
\NewCommandCopy{\circled}{\带圈}
\NewCommandCopy{\invertedOctagon}{\反白八角框}
% Traditional Chinese / 繁体 (带圈→帶圈)
\NewCommandCopy{\帶圈}{\带圈}

% ============================================================
% Chinese key aliases / 中文 Key 别名
% ============================================================
\ExplSyntaxOn
\keys_define:nn { luatexcn / textbox }
  {
    % 简体
    高度 .tl_set:N = \l__luatexcn_textbox_height_tl,
    列数 .int_set:N = \l__luatexcn_textbox_n_cols_int,
    外列数 .int_set:N = \l__luatexcn_textbox_outer_cols_int,
    填充 .bool_set:N = \l__luatexcn_textbox_distribute_bool,
    框对齐 .tl_set:N = \l__luatexcn_textbox_box_align_tl,
    边框 .bool_set:N = \l__luatexcn_textbox_border_bool,
    版心 .bool_set:N = \l__luatexcn_textbox_banxin_bool,
    列对齐 .meta:n = { column-align = #1 },
    纵对齐 .meta:n = { vertical-align = #1 },
    悬浮 .bool_set:N = \l__luatexcn_textbox_floating_bool,
    悬浮纸宽 .tl_set:N = \l__luatexcn_textbox_floating_paper_width_tl,
    横位 .tl_set:N = \l__luatexcn_textbox_x_tl,
    纵位 .tl_set:N = \l__luatexcn_textbox_y_tl,
    底色 .tl_set:N = \l__luatexcn_textbox_bg_color_tl,
    字体颜色 .tl_set:N = \l__luatexcn_textbox_font_color_tl,
    字号 .tl_set:N = \l__luatexcn_textbox_font_size_tl,
    格宽 .meta:n = { grid-width = #1 },
    格高 .meta:n = { grid-height = #1 },
    边框形状 .tl_set:N = \l__luatexcn_textbox_border_shape_tl,
    边框色 .tl_set:N = \l__luatexcn_textbox_border_color_tl,
    边框宽 .tl_set:N = \l__luatexcn_textbox_border_width_tl,
    边框间距 .tl_set:N = \l__luatexcn_textbox_border_margin_tl,
    外框 .bool_set:N = \l__luatexcn_textbox_outer_border_bool,
    外框粗细 .tl_set:N = \l__luatexcn_textbox_outer_border_thickness_tl,
    外框间距 .tl_set:N = \l__luatexcn_textbox_outer_border_sep_tl,
    % 繁体（与简体不同形的）
    列數 .int_set:N = \l__luatexcn_textbox_n_cols_int,
    外列數 .int_set:N = \l__luatexcn_textbox_outer_cols_int,
    填充 .bool_set:N = \l__luatexcn_textbox_distribute_bool,
    框對齊 .tl_set:N = \l__luatexcn_textbox_box_align_tl,
    邊框 .bool_set:N = \l__luatexcn_textbox_border_bool,
    列對齊 .meta:n = { column-align = #1 },
    縱對齊 .meta:n = { vertical-align = #1 },
    懸浮 .bool_set:N = \l__luatexcn_textbox_floating_bool,
    懸浮紙寬 .tl_set:N = \l__luatexcn_textbox_floating_paper_width_tl,
    橫位 .tl_set:N = \l__luatexcn_textbox_x_tl,
    縱位 .tl_set:N = \l__luatexcn_textbox_y_tl,
    字號 .tl_set:N = \l__luatexcn_textbox_font_size_tl,
    字體顏色 .tl_set:N = \l__luatexcn_textbox_font_color_tl,
    格寬 .meta:n = { grid-width = #1 },
    格高 .meta:n = { grid-height = #1 },
    邊框形狀 .tl_set:N = \l__luatexcn_textbox_border_shape_tl,
    邊框色 .tl_set:N = \l__luatexcn_textbox_border_color_tl,
    邊框寬 .tl_set:N = \l__luatexcn_textbox_border_width_tl,
    邊框間距 .tl_set:N = \l__luatexcn_textbox_border_margin_tl,
    外框粗細 .tl_set:N = \l__luatexcn_textbox_outer_border_thickness_tl,
    外框間距 .tl_set:N = \l__luatexcn_textbox_outer_border_sep_tl,
  }
\ExplSyntaxOff

\endinput%