moved ftplugins, and fixed some plugins

ftplugin/tex.lua

@@ -1,21 +1,103 @@
+-- LaTeX keybindings and Zathura management
+
 -- Keybinding to compile LaTeX to PDF using xelatex with latexmk and output to the "output" directory
-vim.keymap.set('n', '<leader>ll', ':!mkdir -p output && latexmk -pdf -xelatex -output-directory=output -synctex=1 %<CR>',
+vim.keymap.set(
+  'n',
+  '<leader>ll',
+  ':!mkdir -p output && latexmk -pdf -xelatex -output-directory=output -synctex=1 %<CR>',
   {
     desc = 'Compile LaTeX to PDF using xelatex with SyncTeX in the output directory',
     noremap = true,
-    silent = true
-  })
+    silent = true,
+  }
+)
 
 -- Keybinding to view the compiled PDF in Zathura from the output directory
 vim.keymap.set('n', '<leader>lv', function()
-  local pdf_path = vim.fn.expand('%:p:h') .. '/output/' .. vim.fn.expand('%:t:r') .. '.pdf'
-  vim.cmd(':silent !nohup zathura ' .. pdf_path .. ' >/dev/null 2>&1 &')
+  local pdf_path = vim.fn.expand('%:p:h/output/%:t:r.pdf')
+
+  -- Check if Zathura is already running for this PDF
+  local zathura_running = vim.fn.systemlist('pgrep -f "zathura ' .. pdf_path .. '"')
+
+  if #zathura_running == 0 then
+    -- Start Zathura if it's not already running for this PDF
+    vim.fn.jobstart({ 'zathura', pdf_path }, { detach = true, stdout = 'null', stderr = 'null' })
+  else
+    print('Zathura is already running for this file.')
+  end
 end, {
   desc = 'View PDF in Zathura from the output directory',
   noremap = true,
-  silent = true
+  silent = true,
 })
 
--- Custom surroundings for LaTeX
-vim.g.surround_110 = "\\begin{\r}\n\\end{\r}" -- map `yssn` for \begin{} \end{}
+-- Function to close the Zathura instance for the current PDF
+local function close_zathura()
+  local pdf_path = vim.fn.expand('%:p:h') .. '/output/' .. vim.fn.expand('%:t:r') .. '.pdf'
+  -- Terminate Zathura process associated with the PDF
+  vim.fn.system({ 'pkill', '-f', 'zathura ' .. pdf_path })
+end
 
+-- Keybinding to close Zathura for the current PDF
+vim.keymap.set(
+  'n',
+  '<leader>lc', -- Replace with your preferred key combination
+  close_zathura,
+  {
+    desc = 'Close Zathura instance for the current PDF',
+    noremap = true,
+    silent = true,
+  }
+)
+
+-- Prevent multiple Zathura instances and add cooldown period
+local last_open_time = 0
+local cooldown_period = 5 -- Cooldown period in seconds
+local max_instances = 5
+local zathura_pids = {}
+local auto_close_min = 180
+
+-- Function to schedule Zathura closure after a delay in minutes
+local function schedule_close_zathura(minutes)
+  local delay_ms = minutes * 60 * 1000 -- Convert minutes to milliseconds
+  vim.defer_fn(close_zathura, delay_ms)
+end
+
+-- Autocmd to automatically open the PDF in Zathura when a .tex file is opened
+vim.api.nvim_create_autocmd('BufEnter', {
+  pattern = '*.tex',
+  callback = function()
+    local current_time = vim.fn.reltimefloat(vim.fn.reltime())
+    if current_time - last_open_time < cooldown_period then
+      print('Cooldown active, skipping Zathura launch.')
+      return
+    end
+
+    last_open_time = current_time
+
+    if #zathura_pids >= max_instances then
+      print('Maximum number of Zathura instances reached.')
+      return
+    end
+
+    local pdf_path = vim.fn.expand('%:p:h') .. '/output/' .. vim.fn.expand('%:t:r') .. '.pdf'
+    local zathura_running = vim.fn.systemlist('pgrep -f "zathura ' .. pdf_path .. '"')
+
+    if #zathura_running == 0 and vim.fn.filereadable(pdf_path) == 1 then
+      local job_id = vim.fn.jobstart({ 'zathura', pdf_path }, { detach = true })
+      table.insert(zathura_pids, job_id)
+      -- Schedule the closure of Zathura after 180 minutes (3 hours)
+      schedule_close_zathura(auto_close_min)
+    else
+      print('Zathura is already running for this file or PDF not found.')
+    end
+  end,
+})
+
+-- Autocmd to close all Zathura instances related to the current file when exiting Neovim
+vim.api.nvim_create_autocmd('VimLeavePre', {
+  callback = function()
+    local pdf_path = vim.fn.expand('%:p:h') .. '/output/' .. vim.fn.expand('%:t:r') .. '.pdf'
+    vim.fn.system({ 'pkill', '-f', 'zathura ' .. pdf_path })
+  end,
+})