[elpa] externals/auctex 5ce08ab 33/48: Raise robustness of call of dvipng command

[Tassilo Horn]

branch: externals/auctex
commit 5ce08ab0cc013b934e2dd65bf8ae4f73be35a572
Author: Ikumi Keita <address@hidden>
Commit: Ikumi Keita <address@hidden>

    Raise robustness of call of dvipng command
    
    * preview.el.in (preview-dvipng-command): Remove spurious quotes which
    cause error for file names with space.  (bug#31684)
    (preview-dvipng-color-string): Replace single quotes with double
    quotes for w32 users.
    * doc/preview-latex.texi: (The preview images): Add warning that
    (u)pLaTeX is not compatible with dvipng.
---
 doc/preview-latex.texi | 6 ++++++
 preview.el.in          | 8 ++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/doc/preview-latex.texi b/doc/preview-latex.texi
index 39eed39..d89c5a9 100644
--- a/doc/preview-latex.texi
+++ b/doc/preview-latex.texi
@@ -710,6 +710,12 @@ if the @acronym{DVI} file contains PostScript specials in 
which case the
 affected images will get run through Dvips and Ghostscript once
 @samp{dvipng} finishes.
 
+Note for address@hidden and address@hidden users: It is known that 
@code{dvipng}
+is not compatible with address@hidden and address@hidden  If
address@hidden is set to @samp{dvipng} and (u)address@hidden is
+used, @samp{dvipng} just fails and @previewlatex{} falls back on Dvips
+and Ghostscript.
+
 @item preview-gs-options
 Most interesting to the user perhaps is the setting of this variable.
 It contains the default antialiasing settings @option{-dTextAlphaBits=4}
diff --git a/preview.el.in b/preview.el.in
index 2d81cce..7c7cecc 100644
--- a/preview.el.in
+++ b/preview.el.in
@@ -522,7 +522,7 @@ an explicit list of elements in the CDR, or a symbol to
 be consulted recursively.")
 
 (defcustom preview-dvipng-command
-  "dvipng -picky -noghostscript %d -o \"%m/prev%%03d.png\""
+  "dvipng -picky -noghostscript %d -o %m/prev%%03d.png"
   "*Command used for converting to separate PNG images.
 
 You might specify options for converting to other image types,
@@ -796,13 +796,13 @@ Pure borderless black-on-white will return an empty 
string."
        (border (aref colors 3)))
     (concat
      (and bg
-         (format "--bg 'rgb %s' "
+         (format "--bg \"rgb %s\" "
                  (mapconcat #'preview-gs-color-value bg " ")))
      (and fg
-         (format "--fg 'rgb %s' "
+         (format "--fg \"rgb %s\" "
                  (mapconcat #'preview-gs-color-value fg " ")))
      (and mask border
-         (format "--bd 'rgb %s' "
+         (format "--bd \"rgb %s\" "
                  (mapconcat #'preview-gs-color-value mask " ")))
      (and border
          (format "--bd %d" (max 1 (round (/ (* res border) 72.0))))))))