LanguagePrimitives.TryConvertTo raises (and catches) exceptions on
failed convertions to an enum type like ConsoleColor.
These exceptions were affecting debugging performance of the menu and we
never want exceptions if it's easy to avoid, which in this case it is.
To make it a bit easier to create themes, the various parameters to
Set-PSReadLineOption to set colors has been replaced with a single
parameter accepting a Hashtable.
The valid keys are:
-- ContinuationPrompt: The color of the continuation prompt.
-- Emphasis: The emphasis color, e.g. the matching text when searching history.
-- Error: The error color, e.g. in the prompt.
-- Default: The default token color.
-- Comment: The comment token color.
-- Keyword: The keyword token color.
-- String: The string token color.
-- Operator: The operator token color.
-- Variable: The variable token color.
-- Command: The command token color.
-- Parameter: The parameter token color.
-- Type: The type token color.
-- Number: The number token color.
-- Member: The member name token color.
I was terribly inconsistent.
This is a breaking change, though unlikely to cause troubles.
The apis are mostly used in PowerShell scripts which is not
case sensitive.
The cmdlet name change is also mostly safe.
At any rate, this is version 2.0 and breaking changes should be OK.
Fix selection to use escape sequence for invert - it doesn't look that
great when there are too many colors, but it will work with any
customization.
Also fix tests to work after previous commit.
With no portable way to scrape, displaying red in the prompt is harder.
To start, there is a new option to specify the end of the prompt text so
you can specify exactly what should turn red.
Many folks won't use this, so there are some smarts added at startup to
analyze the prompt function - if it's "pure", as in, doesn't call any
methods or commands, we call it and infer the invariant part of the
prompt, basically the last non-whitespace character plus the trailing
whitespace.
Dongbo Wang