Before the patch, message, headers and hidden citation overlays
had zero priority. All these overlay have `invisible' property.
Emacs documentation says that we should not make assumptions
about which overlay will prevail when they have the same priority
[1]. It happens to work as we need, but we should not rely on
undocumented behavior.
[1] http://www.gnu.org/s/emacs/manual/html_node/elisp/Overlay-Properties.html
Before the change, message and citation invisibility overlays
conflicted: if some citation is made visible and then the whole
message is hidden, that citation remained visible. This happened
because the citation's overlay has an invisible property which
takes priority over the message overlay. The message
invisibility spec does not affect citation visibility, it is
determined solely by the citation overlay invisibility spec.
Hence, if citation is made visible, it is not hidden by message
invisibility spec.
The patch changes citation overlay invisibility property to be a
list which contains both the citation and the message
invisibility specs. This makes the citation invisible if either
of them is added to the `buffer-invisibility-spec'. Note that
all citation visibility states are "restored" when the message
hidden and shown again.
Before the change, the `notmuch-show-insert-text/plain-hook' was
given only the `depth' argument. The patch adds another one -
the message. Currently, the new message argument is not used by
any on the hooks. But it will be used later to get access to
message invisibility specs when wash buttons are inserted.
The emacs bug is that isearch cannot search through invisible text
when the 'invisible' property is a list.
The patch adds `notmuch-isearch-range-invisible' function which
is the same as `isearch-range-invisible' but with fixed Emacs bug
#8721. Advice added for `isearch-range-invisible' which calls
`notmuch-isearch-range-invisible' instead of the original
`isearch-range-invisible' when in `notmuch-show-mode'.
This code treats top posted copies essentially like signatures, except
that it doesn't sanity check their length, since neither do their
senders.
New user-visible variables:
notmuch-wash-button-original-hidden-format
notmuch-wash-button-original-visible-format
Rebased-by: Carl Worth <cworth@cworth.org>
(describe-face 'message-cited-text-face)
> message-cited-text-face is an alias for the face `message-cited-text'.
> This face is obsolete since 22.1; use `message-cited-text' instead.
Signed-off-by: Pieter Praet <pieter@praet.org>
Signed-off-by: Jameson Graef Rollins <jrollins@finestructure.net>
Before the change, save-excursion was used to save the point. But the
marker saved by save-excursion was inside a region that was deleted,
so that approach is unreliable, (leading to point jumping to a new
position past the button). This patch instead saves point in an
integer variable, and when restoring, carefully avoids moving point
past the button, (in case the new button label is shorter than the old
button label).
Before the change, citation and signature wash buttons used the
same label in both visible and hidden states. Sometimes it is
very convenient when you can determine if the text is hidden or
shown without reading the context and/or clicking the button.
The patch makes it easy to see if the text is shown or hidden by
explicitly saying what the button does (shows or hides the text).
The removed expressions, which were used to ensure that citations were
both preceded and followed by a blank line, were poorly implemented
and caused a regexp stack overflow on messages more than a few
thousand lines long.
Detect inline patches and convert them to fake attachments, in order
that `diff-mode' highlighting can be applied to the patch. This can be
enabled by customising `notmuch-show-insert-text/plain-hook'.
Add:
- notmuch-wash-wrap-long-lines: Wrap lines longer than the width of
the current window whilst maintaining any citation prefix.
- notmuch-wash-tidy-citations: Tidy up citations by:
- compress repeated otherwise blank citation lines,
- remove otherwise blank citation lines at the head and tail of a
citation,
- notmuch-wash-elide-blank-lines: Compress repeated blank lines and
remove leading and trailing blank lines.
None of these is enabled by default - add them to
`notmuch-show-insert-text/plain-hook' to use.
Reviewed-by: Carl Worth <cworth@cworth.org>: I previously committed a
stale version of this patch.
Add:
- notmuch-wash-wrap-long-lines: Wrap lines longer than the width of
the current window whilst maintaining any citation prefix.
- notmuch-wash-tidy-citations: Tidy up citations by:
- compress repeated otherwise blank citation lines,
- remove otherwise blank citation lines at the head and tail of a
citation and remove blank lines between attribution statements and
the citation,
- notmuch-wash-compress-blanks: Compress repeated blank lines and
remove leading and trailing blank lines.
Enable `notmuch-wash-tidy-citations' and
`notmuch-wash-compress-blanks' by default by adding them to
`notmuch-show-insert-text/plain-hook'. `notmuch-wash-wrap-long-lines'
is not enabled by default.
If `notmuch-wash-wrap-long-lines' is enabled, word wrapping of the
buffer leads to an unappealing display of text, so provide a function
to disable it and add it to the list of `notmuch-show-mode' hook
functions.
Add an `isearch-open-invisible' property to the overlays used to hide
citations and signatures, together with an appropriate function to
leave the invisible text visible should that be required.
