vty-examples v4.0.0 Release Notes
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API changes:
- ๐ "getSize" has been removed. Use "terminal vty >>= display_bounds" where "vty" is an instance of the Vty data structure.
- โ added a "terminal" field to the Vty data structure. Accesses the TerminalHandle associated with the Vty instance.
- Graphics.Vty.Types has undergone a number of changes. Summary:
- Partitioned into Graphics.Vty.Attributes for display attributes. Graphics.Vty.Image for image combinators. Graphics.Vty.Picture for final picture construction.
- Graphics.Vty.Attributes:
- "setFG" and "setBG" are now "with_fore_color" and "with_back_color"
- All other "set.." equations similarly replaced.
- "attr" is now "def_attr", short for "default display attributes" Also added a "current_attr" for "currently applied display attributes"
- Graphics.Vty.Image:
- "horzcat" is now "horiz_cat"
- "vertcat" is now "vert_cat"
- "renderBS" is now "utf8_bytestring"
- "renderChar" is now "char"
- "renderFill" is now "char_fill"
- added a "utf8_string" and "string" (AKA "iso_10464_string") for UTF-8 encoded Strings and ISO-10464 encoded Strings. String literals in GHC have an ISO-10464 runtime representation.
- Graphics.Vty.Picture:
- exports Graphics.Vty.Image
- "pic" is now "pic_for_image"
- added API for setting background fill pattern.
- Completely rewritten output backend.
- Efficient, scanline style output span generator. Has not been fully optimized, but good enough.
- The details required to display the desired picture on a terminal are well encapsulated.
- Terminfo based display terminal implementation. With specialized
derivitives for xterm, Terminal.app, and iTerm.app.
- Attempts to robustly handle even terminals that don't support all display attributes.
- I've tested the following terminals with success: iTerm.app, Terminal.app, xterm, rxvt, mlterm, Eterm, gnome-terminal, konsole, screen, linux vty. Hopefully you will be as successfull.
- Improved unicode support. Double wide characters will display as expected.
- ๐ 256 color support. See Graphics.Vty.Attributes.Color240. The actual output color is adjusted according to the number of colors the terminal supports.
- The Graphics.Vty.Image combinators no longer require matching dimensions to arguments. Unspecified areas are filled in with a user-customizable background pattern. See Graphics.Vty.Picture.
- output images are always cropped to display size.
- โ Significant code coverage by QuickCheck tests. An interactive test for those final properties that couldn't be automatically verified.
Issues resolved:
- "gnome terminal displays non-basic attributes as strikethrough"
- โก๏ธ "Multi-byte characters are not displayed correctly on update"
- "Redraw does not handle rendering a line that extends beyond screen width characters"
- "The <|> and <-> combinators should be more forgiving of mismatched dimensions"
- ๐ "256-color support"