branch: master
commit 4731168eca3f103732a026f70912597faef8bd99
Author: Paul Nelson <ultr...@gmail.com>
Commit: Arash Esbati <ar...@gnu.org>
Allow opened previews to remain visible
* preview.el.in (preview-leave-open-previews-visible): New user
option.
(preview-gs-place, preview-disable, preview-inactive-string)
(preview-place-preview, preview-check-changes): Use it.
(preview-clearout): New optional argument, EXCEPTION.
* doc/preview-latex.texi (The Emacs interface): Document the
new user option.
* NEWS.org (Added): Announce the new custom option. (bug#70455)
---
NEWS.org | 6 ++++--
doc/preview-latex.texi | 4 ++++
preview.el.in | 51 +++++++++++++++++++++++++++++++++++++++++---------
3 files changed, 50 insertions(+), 11 deletions(-)
diff --git a/NEWS.org b/NEWS.org
index b0c8676a..21b98e30 100644
--- a/NEWS.org
+++ b/NEWS.org
@@ -21,11 +21,13 @@
- Add new custom option ~TeX-fold-auto-reveal~ which contols how the
original source text is revealed when user clicks the folded portion
by mouse.
+- Add new custom option ~TeX-fold-region-functions~ which is a list of
+ additional functions to call when folding a region.
- Add new custom option ~preview-protect-point~ which determines whether
previews generated on top of the current point should be temporarily
opened (~nil~ by default).
-- Add new custom option ~TeX-fold-region-functions~ which is a list of
- additional functions to call when folding a region.
+- Add new custom option ~preview-leave-open-previews-visible~ which
+ determines if the preview code stays visible once opened.
- Support query and insert of ~mcite~ compatibility macro
(=style/biblatex.el=).
- Support the =\verbatiminput*= macro (=style/verbatim.el=).
diff --git a/doc/preview-latex.texi b/doc/preview-latex.texi
index 07adc2a9..0c1fb730 100644
--- a/doc/preview-latex.texi
+++ b/doc/preview-latex.texi
@@ -672,6 +672,10 @@ accordingly @code{split} is one entry in
This boolean variable determines whether previews generated on top of the
current point should be temporarily opened. Default value is @code{nil}.
+@item preview-leave-open-previews-visible
+This boolean variable determines whether to leave preview images visible
+(above their generating TeX code) when they are opened.
+
@end vtable
@node The preview images, Misplaced previews, The Emacs interface, For
advanced users
diff --git a/preview.el.in b/preview.el.in
index 5e6b556c..1f65f728 100644
--- a/preview.el.in
+++ b/preview.el.in
@@ -1210,6 +1210,13 @@ is located."
(setcdr (car img) (cdar replacement))
(setcdr img (cdr replacement))))
+(defcustom preview-leave-open-previews-visible nil
+ "Whether to leave previews visible when they are opened.
+If nil, then the TeX preview icon is used when the preview is opened.
+If non-nil, then the preview image is moved above the text."
+ :group 'preview-appearance
+ :type 'boolean)
+
(defun preview-gs-place (ov snippet box run-buffer tempdir ps-file _imagetype)
"Generate an image placeholder rendered over by Ghostscript.
This enters OV into all proper queues in order to make it render
@@ -1231,7 +1238,21 @@ for the file extension."
(overlay-put ov 'queued
(vector box nil snippet))
(overlay-put ov 'preview-image
- (list (preview-icon-copy preview-nonready-icon)))
+ (let ((default (list (preview-icon-copy
preview-nonready-icon))))
+ (if preview-leave-open-previews-visible
+ (if-let ((img
+ (car
+ (delq
+ nil
+ (mapcar
+ (lambda (ovr)
+ (and
+ (eq (overlay-start ovr) (overlay-start
ov))
+ (overlay-get ovr 'preview-image)))
+ (overlays-at (overlay-start ov)))))))
+ img
+ default)
+ default)))
(preview-add-urgentization #'preview-gs-urgentize ov run-buffer)
(list ov))
@@ -1895,6 +1916,11 @@ Disable it if that is the case. Ignores text
properties."
text (overlay-get ov 'preview-prechange)))
(overlay-put ov 'insert-in-front-hooks nil)
(overlay-put ov 'insert-behind-hooks nil)
+ (when (and preview-leave-open-previews-visible
+ (eq (overlay-get ov 'preview-state) 'active))
+ ;; This is so that remote commands, such as `undo',
+ ;; open active previews before disabling them.
+ (preview-toggle ov))
(preview-disable ov)))))
(error nil))
(overlay-put ov 'preview-prechange nil))
@@ -2190,10 +2216,12 @@ active (`transient-mark-mode'), it is run through
`preview-region'."
"Change overlay behaviour of OVR after source edits."
(overlay-put ovr 'queued nil)
(preview-remove-urgentization ovr)
- (overlay-put ovr 'preview-image nil)
+ (unless preview-leave-open-previews-visible
+ (overlay-put ovr 'preview-image nil))
(overlay-put ovr 'timestamp nil)
(setcdr (overlay-get ovr 'strings) (preview-disabled-string ovr))
- (preview-toggle ovr)
+ (unless preview-leave-open-previews-visible
+ (preview-toggle ovr))
(overlay-put ovr 'preview-state 'disabled)
(dolist (filename (overlay-get ovr 'filenames))
(condition-case nil
@@ -2213,17 +2241,20 @@ a hook in some cases"
(preview-delete-file filename)
(file-error nil)))))
-(defun preview-clearout (&optional start end timestamp)
+(defun preview-clearout (&optional start end timestamp exception)
"Clear out all previews in the current region.
When called interactively, the current region is used.
Non-interactively, the region between START and END is
affected. Those two values default to the borders of
the entire buffer. If TIMESTAMP is non-nil, previews
-with a `timestamp' property of it are kept."
+with a `timestamp' property of it are kept. If EXCEPTION
+is a non-nil overlay, then it is not cleared."
(interactive "r")
(dolist (ov (overlays-in (or start (point-min))
(or end (point-max))))
- (and (overlay-get ov 'preview-state)
+ (and (or (not exception)
+ (not (eq ov exception)))
+ (overlay-get ov 'preview-state)
(not (and timestamp
(equal timestamp (overlay-get ov 'timestamp))))
(preview-delete ov))))
@@ -2429,7 +2460,9 @@ visible. For efficiency reasons it is expected that the
buffer
is already selected and unnarrowed."
(concat
(preview-make-clickable (overlay-get ov 'preview-map)
- preview-icon
+ (if preview-leave-open-previews-visible
+ (overlay-get ov 'preview-image)
+ preview-icon)
"\
%s redisplays preview
%s more options")
@@ -2569,7 +2602,6 @@ a list with additional info from the placement hook.
Those lists get concatenated together and get passed
to the close hook."
(setq preview-current-region nil)
- (preview-clearout start end tempdir)
(let ((ov (make-overlay start end nil nil nil)))
(overlay-put ov 'priority (TeX-overlay-prioritize start end))
(overlay-put ov 'preview-map
@@ -2587,7 +2619,8 @@ to the close hook."
place-opts)
(overlay-put ov 'strings
(list (preview-active-string ov)))
- (preview-toggle ov t))))
+ (preview-toggle ov t)
+ (preview-clearout start end tempdir ov))))
(defun preview-counter-find (begin)
"Fetch the next preceding or next preview-counters property.
