dotfiles/.config/nvim/lua/plugins/knap.lua

return {
  "frabjous/knap",
  ft = { "tex", "markdown" },
  keys = {
    {
      "<leader>p",
      function() require("knap").toggle_autopreviewing() end,
      desc = "Knap: toggle autopreview",
    },
  },
  config = function()
    local knap = require("knap")
    local function detect_engine()
      local first_line = vim.api.nvim_buf_get_lines(0, 0, 1, false)[1] or ""
      if first_line:match("^%%%s*xelatex") then
        return "xelatex"
      else
        return "pdflatex"
      end
    end
    local function set_engine()
      local engine = detect_engine()
      if engine == "xelatex" then
        vim.g.knap_settings.textopdf = "xelatex -synctex=1 -interaction=batchmode %docroot%"
      else
        vim.g.knap_settings.textopdf = "pdflatex -synctex=1 -interaction=batchmode %docroot%"
      end
    end
    vim.g.knap_settings = {
      delay = 100,
      texoutputext = "pdf",
      textopdf = "xelatex -synctex=1 -interaction=batchmode %docroot%",
      textopdfviewerlaunch = "zathura --synctex-editor-command 'nvim --headless -es --cmd \"lua require('\"'\"'knaphelper'\"'\"').relayjump('\"'\"'%servername%'\"'\"','\"'\"'%{input}'\"'\"',%{line},0)\"' ./%outputfile%",
      textopdfviewerrefresh = "reload",
      textopdfforwardjump = "zathura --synctex-forward=%line%:%column%:%srcfile% %outputfile%",
    }
    vim.api.nvim_create_autocmd("User", {
      pattern = "KnapShowView",
      callback = set_engine,
    })
    vim.api.nvim_create_autocmd("User", {
      pattern = "KnapCompile",
      callback = set_engine,
    })
    vim.api.nvim_create_autocmd("BufWritePost", {
      pattern = "*.tex",
      callback = set_engine,
    })
    vim.api.nvim_create_autocmd("FileType", {
      pattern = { "tex", "markdown" },
      callback = function(args)
        local bufnr = args.buf
        vim.keymap.set({ "n", "v", "i" }, "<F7>", function()
          knap.forward_jump()
        end, {
          buffer = bufnr,
          desc = "Knap: jump to cursor",
        })
        if vim.bo[bufnr].filetype == "tex" then
          knap.toggle_autopreviewing()
        end
      end,
    })
  end,
}