[nongnu] elpa/markdown-mode ad3a816f7b 4/4: Merge pull request #757 from jrblevin/improve/issue-753

[ELPA Syncer]

branch: elpa/markdown-mode
commit ad3a816f7be97deb83fc0a7fa41305c79009bac5
Merge: 2d79c3b95c 2e7098bb96
Author: Shohei YOSHIDA <syohex@gmail.com>
Commit: GitHub <noreply@github.com>

    Merge pull request #757 from jrblevin/improve/issue-753
    
    Improve horizontal rule rendering in markdown-view-mode
---
 CHANGES.md       |  1 +
 markdown-mode.el | 29 +++++++++++++++++++++--------
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/CHANGES.md b/CHANGES.md
index f2a4fe4e32..fb1f791c61 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -21,6 +21,7 @@
     - `clear-image-cache` to make toggle inline image update.
     - Highlight autolinks if a scheme is valid and it is not registered in 
markdown-uri-types
       [GH-743][]
+    - Improve horizontal rule rendering in `markdown-view-mode` [GH-753][]
 
 *   Bug fixes:
     - Don't override table faces by link faces [GH-716][]
diff --git a/markdown-mode.el b/markdown-mode.el
index 0e65dc7dd1..6bdf03abb2 100644
--- a/markdown-mode.el
+++ b/markdown-mode.el
@@ -3509,17 +3509,30 @@ SEQ may be an atom or a sequence."
                                    `(display ,display-string))))))))
     t))
 
+(defun markdown--fontify-hrs-view-mode (hr-char)
+  (if (and hr-char (display-supports-face-attributes-p '(:extend t)))
+      (add-text-properties
+       (match-beginning 0) (match-end 0)
+       `(face
+         (:inherit markdown-hr-face :underline t :extend t)
+         font-lock-multiline t
+         display "\n"))
+    (let ((hr-len (and hr-char (/ (1- (window-body-width)) (char-width 
hr-char)))))
+      (add-text-properties
+       (match-beginning 0) (match-end 0)
+       `(face
+         markdown-hr-face font-lock-multiline t
+         display ,(make-string hr-len hr-char))))))
+
 (defun markdown-fontify-hrs (last)
   "Add text properties to horizontal rules from point to LAST."
   (when (markdown-match-hr last)
-    (let* ((hr-char (markdown--first-displayable markdown-hr-display-char))
-           (hr-len (and hr-char (/ (window-max-chars-per-line) (char-width 
hr-char)))))
-      (add-text-properties
-       (match-beginning 0) (match-end 0)
-       `(face markdown-hr-face
-              font-lock-multiline t
-              ,@(when (and markdown-hide-markup hr-char)
-                  `(display ,(make-string hr-len hr-char)))))
+    (let ((hr-char (markdown--first-displayable markdown-hr-display-char)))
+      (if (and markdown-hide-markup hr-char)
+          (markdown--fontify-hrs-view-mode hr-char)
+        (add-text-properties
+         (match-beginning 0) (match-end 0)
+         `(face markdown-hr-face font-lock-multiline t)))
       t)))
 
 (defun markdown-fontify-sub-superscripts (last)