bug#28033: [PATCH] Add new face 'header-line-highlight'

[Alex <agrambot@gmail.com>]

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Some header-line configurations don't interact nicely with the
'highlight' face, particularly when they use the :box attribute.


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From 6ac60c53180c87d1b5c5dd2ebdfda259938a8e32 Mon Sep 17 00:00:00 2001
From: Alexander Gramiak <agrambot@gmail.com>
Date: Wed, 9 Aug 2017 17:14:06 -0600
Subject: [PATCH] Add new face 'header-line-highlight'

* doc/emacs/display.texi (Standard Faces):
* etc/NEWS: Document the face.
* lisp/emacs-lisp/tabulated-list.el (tabulated-list-init-header):
* lisp/info.el (Info-fontify-node): Use the face.
* lisp/faces.el: Define the face.
---
 doc/emacs/display.texi            | 4 ++++
 etc/NEWS                          | 5 +++++
 lisp/emacs-lisp/tabulated-list.el | 2 +-
 lisp/faces.el                     | 5 +++++
 lisp/info.el                      | 2 +-
 5 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/doc/emacs/display.texi b/doc/emacs/display.texi
index 083fcdf97a..440aab1055 100644
--- a/doc/emacs/display.texi
+++ b/doc/emacs/display.texi
@@ -711,6 +711,10 @@ Standard Faces
 at the top of a window just as the mode line appears at the bottom.
 Most windows do not have a header line---only some special modes, such
 Info mode, create one.
+@item header-line-highlight
+@cindex header-line-highlight face
+Similar to @code{highlight} and @code{mode-line-highlight}, but used
+for mouse-sensitive portions of text on header lines.
 @item vertical-border
 @cindex vertical-border face
 This face is used for the vertical divider between windows on text
diff --git a/etc/NEWS b/etc/NEWS
index 2b789be3c8..dfb7ca3fca 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -254,6 +254,11 @@ face instead of the 'escape-glyph' face.
 ** Approximations to quotes are now displayed with the new 'homoglyph'
 face instead of the 'escape-glyph' face.
 
++++
+** The new face 'header-line-highlight' has been introduced as the
+header line analogue of 'mode-line-highlight'.  This should be the
+preferred mouse-face for mouse-sensitive elements in the header line.
+
 ---
 ** 'C-x h' ('mark-whole-buffer') will now avoid marking the prompt
 part of minibuffers.
diff --git a/lisp/emacs-lisp/tabulated-list.el b/lisp/emacs-lisp/tabulated-list.el
index 8ff5cdf18e..b91532f7e8 100644
--- a/lisp/emacs-lisp/tabulated-list.el
+++ b/lisp/emacs-lisp/tabulated-list.el
@@ -191,7 +191,7 @@ tabulated-list-init-header
   ;; FIXME: Should share code with tabulated-list-print-col!
   (let ((x (max tabulated-list-padding 0))
 	(button-props `(help-echo "Click to sort by column"
-			mouse-face highlight
+			mouse-face header-line-highlight
 			keymap ,tabulated-list-sort-button-map))
 	(cols nil))
     (if display-line-numbers
diff --git a/lisp/faces.el b/lisp/faces.el
index 5ed11d11ce..01d94d7aae 100644
--- a/lisp/faces.el
+++ b/lisp/faces.el
@@ -2628,6 +2628,11 @@ header-line
   :version "21.1"
   :group 'basic-faces)
 
+(defface header-line-highlight '((t :inherit highlight))
+  "Basic header line face for highlighting."
+  :version "26.1"
+  :group 'basic-faces)
+
 (defface vertical-border
   '((((type tty)) :inherit mode-line-inactive))
   "Face used for vertical window dividers on ttys."
diff --git a/lisp/info.el b/lisp/info.el
index c7f0bbf08d..45a9116e06 100644
--- a/lisp/info.el
+++ b/lisp/info.el
@@ -4654,7 +4654,7 @@ Info-fontify-node
             (if (string-equal (downcase tag) "node")
                 (put-text-property nbeg nend 'font-lock-face 'info-header-node)
               (put-text-property nbeg nend 'font-lock-face 'info-header-xref)
-              (put-text-property tbeg nend 'mouse-face 'highlight)
+              (put-text-property tbeg nend 'mouse-face 'header-line-highlight)
               (put-text-property tbeg nend
                                  'help-echo
                                  (concat "mouse-2: Go to node "
-- 
2.13.2