Add DAP repl integration

README.md

@@ -56,6 +56,8 @@ iron.setup {
       -- or return a string name such as the following
       -- return "iron"
     end,
+    -- Send selections to the DAP repl if an nvim-dap session is running.
+    dap_integration = true
     -- How the repl window will be displayed
     -- See below for more information
     repl_open_cmd = view.bottom(40),

lua/iron/core.lua

@@ -192,6 +192,13 @@ end
 -- supplied as argument.
 -- @param ft filetype
 core.repl_for = function(ft)
+  if require('iron.dap').is_dap_session_running() then
+    -- If there's a dap session running, default to the dap repl. By
+    -- intercepting here, we can support dap repls in filetypes that aren't
+    -- normally supported (e.g. java).
+    -- TODO find and open the dap repl window?
+    return
+  end
   local meta = ll.get(ft)
   if ll.repl_exists(meta) then
     local currwin = vim.api.nvim_get_current_win()
@@ -239,6 +246,11 @@ local send = function(ft, data)
   -- track non-default REPls.
   local meta = vim.b[0].repl
 
+  if require('iron.dap').is_dap_session_running() then
+    require('iron.dap').send_to_dap(data)
+    return
+  end
+
   -- However, this attached meta may associated with a REPL that has been
   -- closed, we need to check for that.
   -- If the attached REPL is not existed or has been closed, we will try to
@@ -756,6 +768,10 @@ core.setup = function(opts)
       end
     end
 
+    if opts.config.dap_integration then
+      require('iron.dap').enable_integration()
+    end
+
     if ll.tmp.repl_open_cmd == nil then
       local msg = "A default repl_open_cmd was not set. "
       msg = msg .. "Please set a default by adding '_DEFAULT' "

lua/iron/dap.lua

@@ -0,0 +1,31 @@
+local M = {}
+
+local is_dap_integration_enabled = false
+
+--- Sets up a hook to keep track of the DAP session state.
+function M.enable_integration()
+  is_dap_integration_enabled = true
+end
+
+--- Returns true if dap_integration is enabled and a dap session is running.
+--- This function will always return false if dap_integration is not enabled.
+--- @return boolean
+function M.is_dap_session_running()
+  local has_dap, dap = pcall(require, 'dap')
+  return has_dap and is_dap_integration_enabled and dap.session() ~= nil
+end
+
+--- Send the lines to the dap-repl
+--- @param lines string|string[]
+function M.send_to_dap(lines)
+  local text
+  if type(lines) == 'table' then
+    text = table.concat(lines, "\n"):gsub('\r', '')
+  else
+    text = lines
+  end
+  require('dap').repl.execute(text)
+  require('dap').repl.open()
+end
+
+return M