1 files changed, 35 insertions, 0 deletions
diff --git a/plugins/autowrap.lua b/plugins/autowrap.lua
new file mode 100644
index 0000000..85d4c24
--- /dev/null
+++ b/plugins/autowrap.lua
@@ -0,0 +1,35 @@
+require "plugins.reflow"
+local config = require "core.config"
+local command = require "core.command"
+local DocView = require "core.docview"
+
+config.autowrap_files = { "%.md$", "%.txt$" }
+
+
+local on_text_input = DocView.on_text_input
+
+DocView.on_text_input = function(self, ...)
+  on_text_input(self, ...)
+
+  -- early-exit if the filename does not match a file type pattern
+  local filename = self.doc.filename or ""
+  local matched = false
+  for _, ptn in ipairs(config.autowrap_files) do
+    if filename:match(ptn) then
+      matched = true
+      break
+    end
+  end
+  if not matched then return end
+
+  -- do automatic reflow on line if we're typing at the end of the line and have
+  -- reached the line limit
+  local line, col = self.doc:get_selection()
+  local text = self.doc:get_text(line, 1, line, math.huge)
+  if #text >= config.line_limit and col > #text then
+    command.perform("doc:select-lines")
+    command.perform("reflow:reflow")
+    command.perform("doc:move-to-next-char")
+    command.perform("doc:move-to-previous-char")
+  end
+end