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Short:TTX help-key macro for ARexxGuide
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This ARexx macro for TurboText must be used in conjunction with
ARexxGuide, a shareware hypertext manual. It gives a quick online
reference to the syntax of ARexx functions and instruction keywords.

Pressing the help key when the cursor is positioned on any word or
character with a special meaning in ARexx will bring up an AmigaGuide
window with information about the instruction keyword, function, or
operator character.

The library rexxarplib.library may be used with this macro to open a
requester that lists information about a word that is not recognized.

rexxarplib.library IS NOT REQUIRED, however. If two comment tokens are
removed from the code, the rexxarplib requester will not be shown.
Instructions for making that alteration are included in the macro.


The macro ARx_Help.TTX should be moved to your REXX: directory. The file
ARx_Guide.xref should be moved to the directory where the other files in
the ARexxGuide archive are stored. There may already be a file of that
name in the directory (it was included in the Extras drawer of the
original archive). This version is more complete and should replace the

Finally, TurboText must be told about the macro so that you can use it
easily when editing an ARexx script. That is done through one of
TurboText's definitions files, which are located by default in the
TurboText:Support directory. These files allow the user to customize the
way TurboText handles certain keys, menus, and other aspects of the
program. A macro can be attached to any key, for example.

Consult the TTX manual, Chapter 9, for more information about definitions

The file that is automatically loaded when TurboText begins is called
TTX_Startup.dfn. That file should be changed if you want the ARexxGuide
help key available whenever you run TurboText. It is also possible to
install the help key only when needed. Both methods are described below:

Automatic help-key
   Add the following lines to the section labeled KEYBOARD: in the file

      HELP               ExecARexxMacro "ARx_Help" SYNC
      SHIFT-HELP         ExecARexxMacro "ARx_Help" ASYNC

  You may wish to use another qualifier-key, like CTRL or ALT. The wide
  range of choices for qualifier keys are described in the file
  TTX_Standard.dfn at about line 129.

  The parameters 'SYNC' and 'ASYNC' determine how the macro will treat
  previously opened windows under v34 of the AmigaGuide utility. If 'SYNC'
  is specified, the the macro will load the current node into a window
  previously opened by the macro. It will bring the window to the front of
  the screen. The 'ASYNC' options causes v34 to open a new window each
  time the help key is pressed.

  A new window is always opened when MultiView is used as the display
  utility since the macro has no way to know if a previous window is

Explicit loading of help-key definition
  If you'd rather not have the help-key defined at all times, you can use
  the file TTX_ARexxHelp.dfn, to define the help key only when needed.
  Place that file in the TurboText:Support directory and load it by
  choosing the menu item Prefs/Open Defs. It will alter the current
  definition for the Help and Shift-Help keys, but will not affect other

  To return to the standard definition, choose TTX_Startup.dfn from the
  Prefs/Open Defs menu.


        In the list below the { ^ } character is used to indicate the
        position of the cursor when the help key is pressed. The notes
        after the { :: } characters explain what the macro will display.

   if abbrev(strip(upper(Info)), 'SHOW') then  do
 :: A requester will present information about the clause. It identifies
    the clause as an instruction, assignment, command, comment, or null.
   if abbrev(strip(upper(Info)), 'SHOW') then  do
 :: The ARexxGuide node for DO will be displayed. If the cursor is located
    at an end-of-line blank, it will look for a node matching the last
    word in the line. It isn't necessary to enter the () after a function
    name to get help for that function. Just type the name and press help.
   if abbrev(strip(upper(Info)), 'SHOW') then  do
 :: The ARexxGuide node for the ABBREV() function will appear.
   if abbrev(strip(upper(Info)), 'SHOW') then  do
 :: The ARexxGuide node explaining parentheses will appear. Generally,
    when the cursor is located on a punctuation mark of some kind, the
    node for that character will appear. This is useful when one wishes to
    check for valid operator characters.
   if abbrev(strip(upper(Info)), 'SHOW') then  do
 :: A requester will identify the current clause as an instruction and
    will identify 'Info' as a variable and as a function argument. If a
    lookup word is not recognized as an instruction keyword or subkeyword
    or as a function name, the macro will attempt to identify how the word
    is used in the clause. It recognizes variables, numbers, strings,
    function names, function arguments, and more. It will, however, be
    confused by a clause that includes multiple levels of quotation marks.
   if abbrev(strip(upper(Info)), 'SHOW') then  do
 :: This would normally be identified in a requester as a string, but
    since SHOW() is the name of a built-in macro, the macro won't make it
    that far. It will display the ARexxGuide node for SHOW(). In general,
    the macro will display the node for any word recognized as a function
    or instruction name, even if the word is used in a different context
    in the clause.

Contents of text/edit/ARx_Help1_0.lha
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 1406    8750  16.1% -lh5- 0e8a Oct  6  1993 ARx_Guide.xref
[generic]                 5868   18824  31.2% -lh5- c133 Oct  6  1993 ARx_Help.ttx
[generic]                  173     240  72.1% -lh5- 0f4b Oct  6  1993 TTX_ARexxHelp.dfn
[generic]                 2330    6008  38.8% -lh5- 0fae Oct  6  1993 ARx_Help.ttx.README
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         4 files    9777   33822  28.9%            Oct  7  1993

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