New filer features.

Operations performed in background when possible.

Display=>Show actions
Display=>Close all
Display=>Save=><Save box>
File=>Info=><Info box>
File=>Copy=><save box>
File=>Find=><object to find> File=>Access=><more options> File=>Stamp
File=>Set type

These apply to background operations only: Options=>Confirm
Options=>Verbose
Options=>Force
Options=>Newer

Find=><object to find>

shift-right-close opens parent leaving child open too

Viewer location handling improved
Viewer update improved

Extended functionality *filer_opendir
new message filer_opendirat
new message fileraction_senddirectory(?) new message fileraction_sendselection(?) new message fileraction_startoperation
new module filer_action
new command *filer_run
new command *filer_action
new command *filer_boot
new swi fileraction_senddirectory

     r0   Task handle to send the message
     r1   Points to nul terminated directory name

     r0   Task handle to send the message
     r1   Points to nul terminated selection name

     r0   Task handle to send the message
     r1   Operation ID to start:
          0    Copy
          1    Move (rename)
          2    Delete
          3    Set access
          4    Set type
          5    Count
          6    Move (by copying and deleting afterwards)
          7    Copy local (within directory)
          8    Stamp files
          9    Find file
     r2   Option bits:
          bit  meaning
          0    Verbose
          1    Confirm
          2    Force
          3    Newer (a opposed to just Look)
          4    Recurse (only applies to access)
     r3   Points to operation specific data:
     r4   Length of operation specific data:
          Copy:
          r3   points to nul terminated name of destination directory
          r4   strlen( r3 ) + 1
          Move:
          r3   points to nul terminated name of destination directory
          r4   strlen( r3 ) + 1
          Delete:
          r3   unused
          r4   0
          Set access:
          r3   Points to word containing required new access:
                bottom two bytes indicate the values to set when setting the values
                top two bytes flag which bits are to be left alone
          r4   sizeof( int )
          Set type:
          r3   Points to word containing new type in bits 0-11
          r4   sizeof( int )
          Count:
          r3   unused
          r4   0
          Copy Move:
          r3   points to nul terminated name of destination directory
          r4   strlen( r3 ) + 1
          Copy Local:
          r3   points to nul terminated destination name
          r4   strlen( r3 ) + 1
          Stamp:
          r3   unused
          r4   0
          Find:
          r3   points to null terminated name of object to find
          r4   strlen( rs ) + 1

Large numbers of bugs fixed
drag to empty piece of icon bar

Changed/Updated messages:
Message_FilerCloseDir:
R1+20 filing system number (as PRM specifies) R1+24 Was 'must be zero', now is:

        bit     meaning when set
        0       Full name of directory has already been canonicalised - don't
                canonicalise before use. Normally the name supplied would be
                canonicalised before being checked against the canonical
                name of each viewer, this inhibits this step.
        1-31    reserved for future use - must be zero.

New messages:
Message_FilerSelectionDirectory
ms_data = null terminated name of directory with selection in it.

Message_FilerAddSelection
ms_data = null terminated, space separated list of names of selected files.

Message_FilerAction
ms_data = action:

          0    Copy
          1    Move (rename)
          2    Delete
          3    Set access
          4    Set type
          5    Count
          6    Move (by copying and deleting afterwards)
          7    Copy local (within directory)
          8    Stamp files
          9    Find file

          bit  meaning
          0    Verbose
          1    Confirm
          2    Force
          3    Newer (a opposed to just Look)
          4    Recurse (only applies to access)

          Copy:
          nul terminated name of destination directory

          Move:
          nul terminated name of destination directory

          Delete:
          unused
          
          Set access:
          word containing required new access:
                bottom two bytes indicate the values to set when setting the values
                top two bytes flag which bits are to be left alone

          Set type:
          Word containing new type in bits 0-11

          Count:
          unused

          Copy Move
          nul terminated name of destination directory

          Copy Local
          nul terminated destination name

          Stamp
          unused

          Find
          null terminated name of object to find