SEMI NEWS --- history of major-changes.
Copyright (C) 1998,1999 Free Software Foundation, Inc.

* Changes in SEMI 1.13

** Requires FLIM 1.13 API


** Don't expect raw-buffer

In FLIM 1.13 API, existence of a raw-buffer corresponding to each
entity is not guaranteed.

*** Now acting-method must not expect to run in raw-buffer

Function `mime-play-entity' was changed to permit to run in any buffer
(may be called in preview-buffer).  So each acting-method is called in
any buffer.

*** Don't refer variable `mime-raw-buffer'

Preview-buffer's local variable `mime-raw-buffer' is deleted.  So
don't refer it.

*** Don't refer variable `mime-preview-buffer'

There are no guarantee about existence of a raw-buffer corresponding
to each entity, so don't refer buffer local variables of the
raw-buffer, e.g. `mime-preview-buffer'.


** Function `mime-play-entity'

Function `mime-play-entity' was renamed from `mime-raw-play-entity'
and changed interface.

Current interface is:

    mime-play-entity (entity &optional situation ignored-method)

Please use `situation' if you would like to specify `mode' and
`ignore-examples'.


** Text property `mime-view-entity-{header|body}'

Now mime-view put text property `mime-view-entity-header' and
`mime-view-entity-body' in header and body of each entity.


** Behavior change about `mime-display-header-hook'

Function `mime-display-entity' runs `mime-display-header-hook' before
it inserts "\n".

In addition, now it is cleared that current point means beginning of
header when `mime-display-entity' runs `mime-display-header-hook'.
Therefore header-presentation-method must not change current point.


** New variable `mime-preview-move-scroll'

This variables decides how to scroll in the MIME-View-mode
when mime-preview-move-upper, mime-preview-move-previous,
mime-preview-move-next is called. Those are bound to `u', `p', `n',
respectively.


* Changes in SEMI 1.12

There are no user-visible changes.

** New function `eliminate-top-spaces'

Now mime-edit has it.


* Changes in SEMI 1.11

** New function `mime-edit-decode-message-in-buffer'

Add new function `mime-edit-decode-message-in-buffer'.  Function
`mime-edit-decode-buffer' was abolished.


** Requires FLIM 1.12 API


* Changes in SEMI 1.10

** Abolish variable `mime-temp-directory'

  FLIM 1.11 and SEMI 1.10 use variable `temporary-file-directory'
instead of `mime-temp-directory'.  So environment variable
"MIME_TMP_DIR" and "TM_TMP_DIR" are not effective to specify temporary
directory of FLIM and SEMI.


** Abolish function `mime-text-insert-decoded-body'

  SEMI 1.10 uses function `mime-insert-text-content' of FLIM 1.11 API
instead of `mime-text-insert-decoded-body'.

  Now `mime-view-caesar' does not run `mime-text-decode-hook'.


* Changes in SEMI 1.9

** User option `mime-encoding-list'

  SEMI 1.9 requires FLIM 1.10 API.  In FLIM 1.10 API, variable
`mime-file-encoding-method-alist' was abolished.  If you want to use
non-standard Content-Transfer-Encoding to insert a file into sending
message, please edit new user option `mime-encoding-list' instead of
`mime-file-encoding-method-alist'.


** Constant `mime-user-interface-product'

  Constant `mime-user-interface-version' was renamed to
`mime-user-interface-product'.  Notice that data format is changed
too.

  FLIM 1.10 API provides following macros to access a slot of the new
data format:

     mime-product-name (product)

     mime-product-version (product)

     mime-product-code-name (product)

Please use them to get elements of the constant
`mime-user-interface-product'.


* Changes in SEMI 1.8

** Don't use "file" command to detect content of entity

  Acting-method to detect content of entity was modified not to use
"file" command.

  Variable `mime-file-content-type-alist' was abolished.  Instead of
it, new variable `mime-magic-type-alist' is available to customize.
It is an alist of regexp about magic-number vs. corresponding
media-types.  Each element looks like (REGEXP TYPE SUBTYPE).  REGEXP
is a regular expression to match against the beginning of the content
of entity.  TYPE is symbol to indicate primary type of media-type.
SUBTYPE is symbol to indicate subtype of media-type.


** Abolish external X-Face viewer


** Abolish obsolete utility for *-field-list and *-field-regexp

  Abolish function `tm:set-fields', `tm:add-fields' and
`tm:delete-fields'.


** Change MUA interface of automatic message/partial combining

  Abolish variable `mime-view-partial-message-method-alist'.

  Instead of it, `request-partial-message-method' in acting-situation
is available to specify MUA depended implementation.

  Each element of `mime-view-partial-message-method-alist' were
required to display message at current summary line, and its return
value were ignored.  On the other hand,
`request-partial-message-method' is required to return structure of
message at current summary line.  Format of it is mime-entity.


** User-Agent field

  MIME-Edit inserts User-Agent field instaed of X-Emacs field if
`mime-edit-insert-user-agent-field' is not nil.  Contents of
User-Agent is specified by mime-edit-user-agent-value'.

  X-Emacs field related features were abolished.


* Changes in SEMI 1.7

** Header-presentation-method

  Now MIME-View uses header-presentation-method instead of
header-filter.

  - abolish variable `mime-view-content-header-filter-alist'

  - abolish function `mime-view-cut-header'

  - Rename `mime-view-content-header-filter-hook' to
    `mime-display-header-hook'


** Abolish `mime-view-ignored-field-regexp'

  Now mime-view uses `mime-view-ignored-field-list' directly in
default header-presentation-method.


** Abolish body filter support

  Please use body-presentation-method.


** Methods for MUAs

  - Rename `mime-view-following-method-alist' to
    `mime-preview-following-method-alist'

  - Rename `mime-method-to-combine-message/partial-pieces' to
    `mime-combine-message/partial-pieces-automatically'


* Changes in SEMI 1.6

** Abolish tm-compatible external method support

  Abolish tm-compatible external method support.  Please use mailcap
method instead of it.


** Abolish `mime-edit-signing-type' and `mime-edit-encrypting-type'

  C-c C-m C-s encloses as "pgp-signed" which means PGP/MIME signature.

  C-c C-m C-e encloses as "pgp-encrypted" which means PGP/MIME
encryption.


** New method to detect content of entity

  Now MIME-View can detect content of entity for
application/octet-stream in default setting.

  It uses "file" command to detect.  User can customize
`mime-file-content-type-alist' to specify media-type for output of
"file" command.  It is an alist of "file" output patterns
vs. corresponding media-types.  Each element looks like (REGEXP TYPE
SUBTYPE).  REGEXP is pattern for "file" command output.  TYPE is
symbol to indicate primary type of media-type.  SUBTYPE is symbol to
indicate subtype of media-type.


** New interface to display message

- Function `mime-view-buffer'
- Function `mime-view-display-message'


** Change interface of internal playback method

  Interface of internal playback method was changed to

	(entity situation)

It is as same as interface of body-presentation-method.


** Change interface of `mime-view-entity-button-visible-p'

** Change interface of `mime-view-insert-entity-button'


** `mime-preview-original-major-mode'

  Abolish variable `mime-preview-original-major-mode'.

  Please use function `mime-preview-original-major-mode' instead of
it.


** mime-preview-over-to-{previous|next}-method-alist

  `mime-preview-over-to-{previous|next}-method-alist' were renamed
from `mime-view-over-to-{previous|next}-method-alist'.


* Changes in SEMI 1.5

** mime-w3

  Add inline text/html preview feature using w3.  If
`mime-setup-enable-inline-html' is not nil, semi-setup.el sets up it.


** `pgp-elkins' -> `pgp-mime'

  Rename `pgp-elkins' -> `pgp-mime'.  Variable
`mime-edit-signing-type' and `mime-edit-encrypting-type' does not
allow `pgp-elkins'.


** type-subtype-score

  Now MIME-View chooses one entity to display body in
multipart/alternative.  In this mechanism,
`mime-view-type-subtype-score-alist' is used to specify priority of
each entity.

  Variable `mime-view-type-subtype-score-alist' is alist of
TYPE-SUBTYPE vs. SCORE.  TYPE-SUBTYPE is cons pair (TYPE . SUBTYPE),
symbol TYPE or t.  TYPE and SUBTYPE are symbol.  `t' means default.
SCORE is integer.  Larger number is larger priority.


** text presentation

  Change text presentation mechanism.  In anything older than SEMI
1.4, text presentation mechanism is based on filter model.  However it
has design problem about conversion between byte representation and
text presentation.  So SEMI was changed to use
body-presentation-method to display text entity.  In this purpose, old
text decoding features were abolished and introduces news features
(cf. next section).


** mime-raw-representation-type and mime-raw-representation-type-alist

  Abolish `mime-text-decoder' and `mime-text-decoder-alist' because of
text presentation mechanism change (cf. previous section).  Instead of
it, SEMI introduces variable about representation-type of
mime-raw-buffer.  If it is `binary', mime-raw-buffer is as same as
network representation.  If it is `cooked', mime-raw-buffer is
code-converted.

  `mime-raw-representation-type-alist' is an alist of major-mode
vs. representation-type.  Each element looks like

    (SYMBOL . REPRESENTATION-TYPE).

SYMBOL is major-mode or t.  t means default.

  `mime-raw-representation-type' is a buffer local variable of
mime-raw-buffer.  If it is non-nil, it overrides
`mime-raw-representation-type-alist'.

  In addition, `mime-raw-buffer-coding-system-alist' was abolished.
Because representation-type has enough information.


* Changes in SEMI 1.4

** mailcap

  mailcap was supported to set up 'mime-acting-condition.

  tm-external-method scripts written by born shell were abolished.


** mime-add-condition

  New function to set up 'mime-preview-condition and/or
'mime-acting-condition.


** signature setting in semi-setup.el

  Abolish MUA depended signature setting.

  Setting for mail-mode were moved to mail-mime-setup.el.


* Changes in SEMI 1.3

** mime-acting-condition

  Format of variable 'mime-acting-condition was changed from `atype'
to `condition tree'.  Its format is as same as
'mime-preview-condition.

  If there are two or more conditions are found when matching, menu
pops up to select method to run.  Selected situation will be added to
example database. (cf. mime-acting-situation-examples-file)

** New variables

*** mime-view-find-every-acting-situation

	Find every available acting-situation if non-nil.

*** mime-acting-situation-examples-file

	File name of example about acting-situation demonstrated by
	user.


* Changes in SEMI 1.2

** User setting

*** hooks

  'mime-view-plain-text-preview-hook was renamed to
'mime-preview-text/plain-hook.

*** Variable

  Variable 'mime-view-childrens-header-showing-Content-Type-list was
abolished.  Please use 'mime-preview-condition instead.

*** API about visible-predicates were abolished

  Following functions were abolished:

    mime-view-header-visible-p (entity message-info)

    mime-view-body-visible-p (entity message-info)

    mime-view-entity-separator-visible-p (entity message-info)

Please use 'mime-preview-condition instead.

  Function 'mime-view-entity-button-visible-p is not abolished, but it
is obsoleted.

*** mime-preview-condition

  Following are added as pre-defined keys:

	'childrens-situation	default preview-situation for children
	'message-button		to specify to display message-button
				    nil:	default (invisible)
				    'visible:	visible
				    'invisible:	invisible
	'entity-button		to specify to display entity-button
				    nil:	default (visible)
				    'visible:	visible
				    'invisible:	invisible
	'header			to specify to display header
				    nil:	default (invisible)
				    'visible:	visible
				    'invisible:	invisible

** API

*** Interface for body-filter

  'mime-view-filter-for-* was renamed to 'mime-preview-filter-for-*.


*** mime-text-decode-body

  Function 'mime-decode-text-body was renamed to
'mime-text-decode-body and changed interface.  New interface is
following:

	mime-text-decode-body (SITUATION)

SITUATION is preview-situation.  Content-Transfer-Encoding and
MIME-charset are specified in field of it.


* Changes in SEMI 1.1

** User setting

*** Setting variable about visible body

  'mime-view-visible-media-type-list and
'mime-view-content-filter-alist were abolished.  Please use
'mime-preview-condition instead.

  Notice that 'mime-preview-condition is not list of
media-type/subtype string nor association-list.  It uses new
data-structure `ctree' (condition-tree; it is introduced to replace
`atype').  Function 'ctree-set-calist-strictly and
'ctree-set-calist-with-default may be useful to modify it (`calist'
(condition-alist) is as same as `atype').


*** API about visible-predicates

  Interface of visible-predicates for entity elements were changed.
New interfaces are following:

    mime-view-entity-button-visible-p (entity message-info)

    mime-view-header-visible-p (entity message-info)

    mime-view-body-visible-p (entity message-info)

    mime-view-entity-separator-visible-p (entity message-info)


** API

*** entity representation

  Structure 'mime-entity-info was renamed to 'mime-entity.  So various
functions were renamed too.


*** Interface for entity-button generators

  Interface of entity-button generators was changed.  New interfaces
is following:

    mime-view-insert-entity-button (entity message-info subject)


*** mime-preview-condition and preview-situation

  Conditions about preview generation are unified to
'mime-preview-condition.  Namely other variables, such as
'mime-view-visible-media-type-list, 'mime-view-content-filter-alist,
'mime-view-image-converter-alist were abolished.

  Preview-situation is generated from entity information, running
environment and 'mime-preview-condition.  These elements are checked
to match with each other. (it is similar to acting-situation)

  Format of preview-situation is association-list.  Following key is
pre-defined:

	'type			  media-type
	'subtype		  media-subtype
	'encoding		  content-transfer-encoding
	'major-mode		  major-mode of MUA
	<STRING>		  attribute of Content-Type field.
	'body-presentation-method body-presentation-method

If 'body-presentation-method is 'with-filter, 'body-filter is used to
specify body-filter function.  If 'body-presentation-method is
function, it is called to generate presentation of entity body.

Body-filter function 'mime-view-filter-for-image refers 'image-format.

Setting for message/partial button is specified by
'mime-preview-condition instead of hard-coding.


*** Interface for body-filter

  Interface of body-filter was changed.  New interfaces is following:

    <body-filter> (situation)

Current pre-defined filters are following:

	mime-view-filter-for-text/plain (situation)
	mime-view-filter-for-text/richtext (situation)
	mime-view-filter-for-text/enriched (situation)
	mime-view-filter-for-image (situation) ; if available

'mime-view-filter-for-application/postscript was abolished.


*** Format of mime-acting-condition (acting-situation)

  Format of `mime-acting-condition' were changed.  `type' and
`subtype' are separated and changed to symbol.


*** Renaming

- mime-view-buffer -> mime-preview-buffer


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