vty/CHANGELOG

5.0.0
    * removed the typeclass based terminal and display context interface in favor of a data
      structure of properties interface.
    * renamed the Terminal interface to Output
    * The default picture for an image now uses the "clear" background. This background fills
      background spans with spaces or just ends the line.
        * Previously the background defaulted to the space character. This causes issues copying
          text from a text editor. The text would end up with many extra spaces at the end of the
          line.
    * Layer support
        * Each layer is an image.
        * The layers for a picture are a list of images.
        * The first image is the top-most layer.
        * The final rendering is as if the bottom layer (last image) was rendered, then the next
          (second to last image) etc.
        * The transparent areas for a layer are the background image components.
        * If the background is clear there is no background layer.
        * If there is a background character then the bottom layer is the background layer.
        * empty_picture is a Picture with no layers and no cursor
        * add_to_top and add_to_bottom add a layer to the top and bottom of the given Picture.
    * compatibility improvements:
        * terminfo based terminals with no cursor support are silently accepted. The cursor
          visibility changes in the Picture will have no effect.
        * alternate (setf/setb) color maps supported. Though colors beyond the first 8 are just a
          guess.
        * added "rgb_color" for easy support of RGB specified colors.
    * input handling changes
        * tests exist.
        * the default amount of time between ESC and a subsequent character that causes VTY to
          interpret the input as "ESC" then the character, versus some special key, has been
          increased to 4000 microseconds; 4 milliseconds.
    * examples moved to vty-examples package. See test directory for cabal file.
        * vty-interactive-terminal-test
            * interactive test. Useful for building a bug report for vty's author.
            * test/interactive_terminal_test.hs
        * vty-event-echo
            * view a input event log for vty. Example of interacting with user.
            * test/EventEcho.hs
        * vty-rouge
            * A bad rouge-like game. Go from the entrance to exit. Example of layers
              and image build operations.
            * test/Rouge.hs
        * vty-benchmark
            * benchmarks vty. A series of tests that push random pictures to the terminal. The
              random pictures are generated using QuickCheck. The same generators used in the
              automated tests.
            * test/benchmark.hs

4.7.0.0
    * API changes:
       * Added Graphics.Vty.Image.crop: Ensure an image is no larger than the specified size.
       * Added Graphics.Vty.Image.pad: Ensure an image is no smaller than the specified size.
       * Added Graphics.Vty.Image.translate: Offset an image.
    * Thanks Ben Boeckel <MathStuf@gmail.com> for these features.

4.3.0.0

4.2.1.0
    * API changes:
        * Attr record accessor fore_color changed to attr_fore_color
        * Attr record accessor back_color changed to attr_back_color
        * Attr record accessor style changed to attr_style
        * Added an "inline" display attribute changing DSL:
            * put_attr_change applies a display attribute change immediately to a terminal
            * For instance, can be used to change the display attrbiutes of text output via putStrLn
              and putStr. EX: "put_attr_change $ back_color red" will set the
              background color to red. 
            * Changes do not apply to a Picture output via output_picture. 
            * See Graphics.Vty.Inline
        * Moved all IO actions into any monad an instance of MonadIO

4.0.0.1
    * binding for mk_wcswidth was incorrect. Most platforms just magically worked due to
      coincidence.

4.0.0
    * API changes:
        * "getSize" has been removed. Use "terminal vty >>= display_bounds" where "vty" is an
          instance of the Vty data structure.
        * 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.
    * 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.
    * 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"
            * http://trac.haskell.org/vty/ticket/14
        * "Multi-byte characters are not displayed correctly on update"
            * http://trac.haskell.org/vty/ticket/10
        * "Redraw does not handle rendering a line that extends beyond screen width characters" 
            * http://trac.haskell.org/vty/ticket/13
        * "The <|> and <-> combinators should be more forgiving of mismatched dimensions" 
            * http://trac.haskell.org/vty/ticket/9
        * "256-color support" 
            * http://trac.haskell.org/vty/ticket/19