Added DoomSquirrel_Open item in MIDI Editor with default zoom level

Items Editing/DoomSquirrel_Open item in midi editor with default zoom level.lua

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+-- @description DoomSquirrel_Open item in MIDI Editor with default zoom level
+-- @author DoomSquirrel
+-- @license GPL v3
+-- @about
+--   # Open item in MIDI Editor with default zoom level
+--   Opens the selected media item in the MIDI Editor with a default zoom level.
+--
+--   Has 2 main operation modes (selectable with the OP_MODE User setting):
+--     1. Zoom to a DEFAULT level
+--     2. Zoom to show all CONTENT of the media item
+--
+--   If you want to use this as the default behaviour when double clicking a media item,
+--   set it in the Preferences:
+--   _**Options > Preferences > Mouse Modifiers > Media Item > double click > Default Action >
+--   Action list... > DoomSquirrel_Open item in midi editor with default zoom level.lua**_
+--
+--**Default Hotkey:** Alt + Shift + M
+-- @repository
+--   https://github.com/tuomiorava/REAPER-ReaScripts
+-- @links
+--  My music = http://iki.fi/atolonen
+-- @donation
+--   Donate via PayPal https://www.paypal.com/donate/?hosted_button_id=2BEA2GHZMAW9A
+-- @version 1.0
+-- @changelog
+--   Initial release
+
+----------------------------
+--- USER SETTINGS ----------
+----------------------------
+
+-- Whether to zoom to content (show all item midi notes vertically) or use default
+OP_MODE = "" -- "CONTENT" or ""
+
+DEFAULT_ZOOM_LEVEL = 10; -- The default zoom level (how many times to zoom in after zooming all the way out)
+MAX_ZOOM_OUT = 96; -- The amount to zoom out, before zooming in (96 is the current Reaper maximum to zoom all the way out)
+
+----------------------------
+--- END OF USER SETTINGS ---
+----------------------------
+
+reaper.Main_OnCommand(40153, 0); -- Action: "Open in built-in MIDI editor"
+
+local editor = reaper.MIDIEditor_GetActive()
+reaper.MIDIEditor_OnCommand(editor, 40468); -- Action: MIDI Editor "Zoom to one loop iteration"
+
+if (OP_MODE == "CONTENT") then
+  reaper.MIDIEditor_OnCommand(editor, 40466); -- Action: MIDI Editor "Zoom to content"
+else
+  -- Zoom all the way out vertically
+  for i = 0, MAX_ZOOM_OUT-1 do
+    reaper.MIDIEditor_OnCommand(editor, 40112, 0); -- Action: MIDI Editor "zoom out vertically"
+  end
+
+  -- Zoom back in vertically
+  for i = 0, DEFAULT_ZOOM_LEVEL-1 do
+    reaper.MIDIEditor_OnCommand(editor, 40111, 0); -- Action: MIDI Editor "zoom in vertically"
+  end
+end