~~Title: File Info Tips and Tiles~~
<pageheader/>

You can use the evaluator in the definitions for [[:file_types:filetype_editor:info_tip|file info tips]] and [[:file_types:filetype_editor:tiles_mode|tiles mode]] to insert text returned by the evaluation.

Use the `{= ... =}` code to insert an evaluation expression. The expression between the `{=` and the `=}` markers can span multiple lines if needed. The return value of the expression is inserted into the info tip or tile.

You can also implement hide sections using the evaluator - use `{!= ... =}` to open the hide section with an evaluation expression. If the expression returns **false**, everything within the hide section will be hidden. Close the hide section with `{!}` as normal.

In this evaluation context, the following variables are available:

<commandtable columns="3">
$$ Variable
$$ Type
$$ Description
$$ <nobr>//column name//</nobr>
$$ //varies//
$$ All the [[:reference:metadata_keywords:keywords_for_columns|column keywords]] are available as variables in this evaluation context.

Note that some keywords may use characters like a `:` that aren't valid in variable names - to access them, use the [[:reference:evaluator:val]] function.

Additionally, the keywords **foldersize**, **foldercontents** and **infotip** are also supported.
$$ file_name
$$ //string//
$$ Returns the full name of the file the expression is being run for. This may be different from **file** which (as a column keyword), returns the value of the //Name// column (which e.g. may have file extensions hidden).
$$ is_dir
$$ //bool//
$$ **True** if the expression is being run for a folder, **false** if it's being run for a file.
</commandtable>

The return value should either be a //str// for an insertion, or a //bool// for a hide section.

  * If the expression is an insertion (using the `{= ... =}` code), the return value from the evaluation expression will be inserted into the info tip or tile at the point where the code appeared.
  * If the expression is for a hide section (using the `{!= ... =}` code), it should return **true** to show the contents of the hide section, or **false** to hide them.