fix(nvim): simplify preview.nvim config

flake.nix

@@ -34,6 +34,16 @@
             pkgs.selene
             pkgs.lua-language-server
           ];
+          okular-wrapped = pkgs.symlinkJoin {
+            name = "okular";
+            paths = [ pkgs.kdePackages.okular ];
+            nativeBuildInputs = [ pkgs.makeWrapper ];
+            postBuild = ''
+              wrapProgram $out/bin/okular \
+                --prefix XDG_DATA_DIRS : "${pkgs.gsettings-desktop-schemas}/share/gsettings-schemas/${pkgs.gsettings-desktop-schemas.name}" \
+                --prefix XDG_DATA_DIRS : "${pkgs.gtk3}/share/gsettings-schemas/${pkgs.gtk3.name}"
+            '';
+          };
         in
         {
           default = pkgs.mkShell {
@@ -51,6 +61,7 @@
               pkgs.mermaid-cli
               pkgs.zathura
               pkgs.sioyek
+              okular-wrapped
             ];
           };
         }

spec/synctex_okular.lua

@@ -0,0 +1,38 @@
+vim.cmd([[set runtimepath=$VIMRUNTIME]])
+vim.opt.runtimepath:append('.')
+vim.opt.packpath = {}
+vim.opt.loadplugins = false
+
+require('preview.commands').setup()
+
+vim.fn.serverstart('/tmp/nvim-preview.sock')
+
+local synctex_pdf = {}
+vim.api.nvim_create_autocmd('User', {
+  pattern = 'PreviewCompileSuccess',
+  callback = function(args)
+    synctex_pdf[args.data.bufnr] = args.data.output
+  end,
+})
+
+vim.g.preview = {
+  latex = {
+    open = { 'okular', '--unique' },
+    output = function(ctx)
+      return vim.fn.fnamemodify(ctx.file, ':h')
+        .. '/build/'
+        .. vim.fn.fnamemodify(ctx.file, ':t:r')
+        .. '.pdf'
+    end,
+  },
+}
+
+vim.keymap.set('n', '<leader>s', function()
+  local pdf = synctex_pdf[vim.api.nvim_get_current_buf()]
+  if pdf then
+    vim.fn.jobstart({
+      'okular', '--unique',
+      ('%s#src:%d:%s'):format(pdf, vim.fn.line('.'), vim.fn.expand('%:p')),
+    })
+  end
+end)

spec/synctex_sioyek.lua

@@ -0,0 +1,42 @@
+vim.cmd([[set runtimepath=$VIMRUNTIME]])
+vim.opt.runtimepath:append('.')
+vim.opt.packpath = {}
+vim.opt.loadplugins = false
+
+require('preview.commands').setup()
+
+vim.fn.serverstart('/tmp/nvim-preview.sock')
+
+local synctex_pdf = {}
+vim.api.nvim_create_autocmd('User', {
+  pattern = 'PreviewCompileSuccess',
+  callback = function(args)
+    synctex_pdf[args.data.bufnr] = args.data.output
+  end,
+})
+
+vim.g.preview = {
+  latex = {
+    open = { 'sioyek', '--instance-name', 'preview' },
+    output = function(ctx)
+      return vim.fn.fnamemodify(ctx.file, ':h')
+        .. '/build/'
+        .. vim.fn.fnamemodify(ctx.file, ':t:r')
+        .. '.pdf'
+    end,
+  },
+}
+
+vim.keymap.set('n', '<leader>s', function()
+  local pdf = synctex_pdf[vim.api.nvim_get_current_buf()]
+  if pdf then
+    vim.fn.jobstart({
+      'sioyek',
+      '--instance-name', 'preview',
+      '--reuse-window',
+      '--forward-search-file', vim.fn.expand('%:p'),
+      '--forward-search-line', tostring(vim.fn.line('.')),
+      pdf,
+    })
+  end
+end)

spec/synctex_zathura.lua

@@ -23,6 +23,12 @@ vim.g.preview = {
       'nvim --server /tmp/nvim-preview.sock'
         .. [[ --remote-expr "execute('b +%{line} %{input}')"]],
     },
+    output = function(ctx)
+      return vim.fn.fnamemodify(ctx.file, ':h')
+        .. '/build/'
+        .. vim.fn.fnamemodify(ctx.file, ':t:r')
+        .. '.pdf'
+    end,
   },
 }