added autosave plugin

1 files changed, 45 insertions, 0 deletions

diff --git a/plugins/autosave.lua b/plugins/autosave.lua
new file mode 100644
index 0000000..11337f7
--- /dev/null
+++ b/plugins/autosave.lua
@@ -0,0 +1,45 @@
+local core = require "core"
+local config = require "core.config"
+local Doc = require "core.doc"
+local DocView = require "core.docview"
+local command = require "core.command"
+-- this is used to detect the wait time
+local last_keypress = os.time()
+-- this exists so that we don't end up with multiple copies of the loop running at once
+local looping = false
+local on_text_change = Doc.on_text_change
+-- the approximate amount of time, in seconds, that it takes to trigger an autosave
+config.autosave_timeout = 1
+
+
+local function loop_for_save()
+  if not looping then
+    looping = true
+    while looping do
+      if os.difftime(os.time(), last_keypress) >= config.autosave_timeout then
+        command.perform "doc:save"
+        -- stop loop
+        looping = false
+      end
+      -- dividing by five is completely arbitrary but it seemed to work well so idc
+      coroutine.yield(config.autosave_timeout) 
+    end
+  end
+end
+
+
+local function updatepress()
+  -- set last keypress time to now
+  last_keypress = os.time()
+  -- put loop in coroutine so it doesn't lag out this script
+  core.add_thread(loop_for_save)
+end
+
+
+function Doc:on_text_change(type)
+  -- check if file is saved
+  if core.active_view:get_name() ~= "unsaved*" then
+    updatepress()
+  end
+  return on_text_change(type)
+end