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master 5629af9: Allow disabling the BPA part of bidi reordering
From: |
Eli Zaretskii |
Subject: |
master 5629af9: Allow disabling the BPA part of bidi reordering |
Date: |
Thu, 28 Nov 2019 10:02:05 -0500 (EST) |
branch: master
commit 5629af9cbe91feee8fb4d896224ed62e455f951d
Author: Eli Zaretskii <address@hidden>
Commit: Eli Zaretskii <address@hidden>
Allow disabling the BPA part of bidi reordering
* src/xdisp.c (syms_of_xdisp): New variable 'bidi-inhibit-bpa'.
* src/bidi.c (bidi_paired_bracket_type): If 'bidi-inhibit-bpa'
is non-nil, return BIDI_BRACKET_NONE for all characters.
* lisp/frame.el: Add 'bidi-inhibit-bpa' to the list of
variables whose changes require redisplay. (Bug#38407)
---
lisp/frame.el | 3 ++-
src/bidi.c | 2 +-
src/xdisp.c | 8 ++++++++
3 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/lisp/frame.el b/lisp/frame.el
index 1a15a4c..1d1dcab 100644
--- a/lisp/frame.el
+++ b/lisp/frame.el
@@ -2736,7 +2736,8 @@ See also `toggle-frame-maximized'."
display-fill-column-indicator-column
display-fill-column-indicator-character
bidi-paragraph-direction
- bidi-display-reordering))
+ bidi-display-reordering
+ bidi-inhibit-bpa))
(provide 'frame)
diff --git a/src/bidi.c b/src/bidi.c
index 1430d22..cb94c4e 100644
--- a/src/bidi.c
+++ b/src/bidi.c
@@ -404,7 +404,7 @@ bidi_mirror_char (int c)
static bidi_bracket_type_t
bidi_paired_bracket_type (int c)
{
- if (c == BIDI_EOB)
+ if (c == BIDI_EOB || bidi_inhibit_bpa)
return BIDI_BRACKET_NONE;
if (c < 0 || c > MAX_CHAR)
emacs_abort ();
diff --git a/src/xdisp.c b/src/xdisp.c
index c4d23be..2467b33 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -34839,6 +34839,14 @@ Intended for use during debugging and for testing bidi
display;
see biditest.el in the test suite. */);
inhibit_bidi_mirroring = false;
+ DEFVAR_BOOL ("bidi-inhibit-bpa", bidi_inhibit_bpa,
+ doc: /* Non-nil means inhibit the Bidirectional Parentheses Algorithm.
+Disabling the BPA makes redisplay faster, but might produce incorrect
+display reordering of bidirectional text with embedded parentheses and
+other bracket characters whose 'paired-bracket' Unicode property is
+non-nil, see `get-char-code-property'. */);
+ bidi_inhibit_bpa = false;
+
#ifdef GLYPH_DEBUG
DEFVAR_BOOL ("inhibit-try-window-id", inhibit_try_window_id,
doc: /* Inhibit try_window_id display optimization. */);
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