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

new swi fileraction_sendselection

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

new swi fileraction_sendstartoperation

 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

ms_data + 4 = options:

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

ms_data + 8 = operation specific data:

 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