autocomplpop is a Vim plugin that automatically opens a popup menu for completion.
Vim is a text editor first released by Bram Moolenaar in 1991 for the Amiga computer. Vim was created as an extended version of the vi editor, with many additional features designed to be helpful in editing program source code; its full name is Vi IMproved.
While Vim is cross-platform, it is most popular on Unix-like operating systems.
Released under a software license compatible with the GNU General Public License, Vim is free and open source software. The program's license includes some charityware clauses.
Like vi, Vim's interface is based not on menus or icons but on commands given in a text user interface; its GUI mode, gVim, adds menus and toolbars for commonly used commands but the full functionality is still expressed through its command line mode.
For many users learning Vim may be difficult and slow initially, but once the basics are understood they progress quickly and editing becomes more efficient. To facilitate this, Vim has a built-in tutorial for beginners. There is also the Vim Users' Manual that details the basic and more advanced Vim features. This manual can be read from within Vim, or found online.
Vim also has a built-in help facility (using the :help command) that allows users to query and navigate through commands and features.
If this plugin has been installed, the auto-popup is enabled at startup by default.
Which completion method is used depends on the text before the cursor. The default behavior is as follows:
1. The keyword completion is attempted if the text before the cursor
consists of two keyword character.
2. The keyword completion is attempted in Scheme file if the text before
the cursor consists of "(" + a keyword character.
3. The filename completion is attempted if the text before the cursor
consists of a filename character + a path separator + 0 or more
4. The omni completion is attempted in Ruby file if the text before the
cursor consists of "." or "::". (Ruby interface is required.)
5. The omni completion is attempted in Python file if the text before
the cursor consists of ".". (Python interface is required.)
6. The omni completion is attempted in HTML/XHTML file if the text
before the cursor consists of "