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bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-
From: |
Eli Zaretskii |
Subject: |
bug#36633: Scrolling by pixels: visible stretch glyphs overwrite header-line. |
Date: |
Sat, 13 Jul 2019 09:19:28 +0300 |
> Date: Fri, 12 Jul 2019 19:10:44 -0700
> From: Keith David Bershatsky <esq@lawlist.com>
>
> Step 1: Launch Emacs 26.
>
> Step 2: Evaluate the following code.
>
> (progn
> (find-library "simple")
> (pixel-scroll-mode 1)
> (re-search-forward "\t\t\t\t\t" nil t)
> (set-window-start (selected-window) (match-beginning 0))
> (setq header-line-format "hello-world")
> (setq buffer-display-table (make-display-table))
> (aset buffer-display-table
> ?\t
> (vector (make-glyph-code ?\u00BB 'font-lock-warning-face)
> (make-glyph-code ?\t 'highlight)))
> (setq tab-width 8))
>
> Step 3: Move the mousewheel downward one time; i.e., one ratchet.
>
> Step 4: Observe the visible stretch glyphs overwriting the header-line.
This doesn't happen to me on MS-Windows, so I think this is
Darwin-specific.
Can someone try reproducing this on GNU/Linux and report?