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patches: maintainer review fixes — thread safety, performance, safety

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BLOCKER fixes:
- @synchronized on visibleRuns/cachedText (AX thread data race)
- Foverlays_in bulk query replaces O(n) per-char Foverlays_at loop

WARNING fixes:
- record_unwind_current_buffer in ns_ax_buffer_text
- ns_ax_frame_for_range simplified (charpos params, no NSRange indirection)
- NSTRACE added to 4 key accessibility functions
- MAC_OS_X_VERSION_MIN_REQUIRED guard for UAZoom APIs
- BUF_OVERLAY_MODIFF TODO in ensureTextCache
This commit is contained in:
Daneel
2026-02-27 14:29:41 +01:00
parent af960683f0
commit eafc80e324
1 changed files with 121 additions and 90 deletions
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141
patches/0001-ns-implement-AXBoundsForRange-for-macOS-Zoom-cursor-.patch
View File

@@ -1,6 +1,6 @@
From a194f7d30770478d476720f86f39c9878aa63e79 Mon Sep 17 00:00:00 2001 From 900c20da8271f503ed3c224795a001dfca8b92f1 Mon Sep 17 00:00:00 2001
From: Martin Sukany <martin@sukany.cz> From: Martin Sukany <martin@sukany.cz>
Date: Fri, 27 Feb 2026 13:38:25 +0100 Date: Fri, 27 Feb 2026 14:29:32 +0100
Subject: [PATCH] ns: implement VoiceOver accessibility (AXBoundsForRange, line Subject: [PATCH] ns: implement VoiceOver accessibility (AXBoundsForRange, line
nav, completions, interactive spans) nav, completions, interactive spans)
@@ -14,25 +14,25 @@ links, completion candidates, and keymap overlays.
(ns_ax_visible_run): Maps contiguous visible buffer ranges to AX string (ns_ax_visible_run): Maps contiguous visible buffer ranges to AX string
indices, skipping invisible text. indices, skipping invisible text.
* src/nsterm.m (ns_ax_buffer_text): Build accessibility string from * src/nsterm.m (ns_ax_buffer_text): Build accessibility string with
buffer content, skipping text hidden via TEXT_PROP_MEANS_INVISIBLE. record_unwind_current_buffer for exception safety.
(ns_ax_event_is_line_nav_key): Detect C-n/C-p/Tab/backtab for line (ns_ax_event_is_line_nav_key): Detect C-n/C-p/Tab/backtab.
granularity forcing. (ns_ax_scan_interactive_spans): Forward scan for interactive properties.
(ns_ax_scan_interactive_spans): Forward scan for interactive text (ns_ax_find_completion_overlay_range): Fast 3-probe + Foverlays_in bulk
properties (widget, button, follow-link, org-link, completion, keymap). fallback (no per-character scan).
(ns_ax_completion_string_from_prop): Handle completion--string as plain (postAccessibilityUpdates): Re-entrance-guarded dispatcher with NSTRACE.
string or annotated cons list. (postAccessibilityNotificationsForFrame:): Hybrid notification strategy.
(postAccessibilityUpdates): Re-entrance-guarded dispatcher called from (invalidateTextCache, ensureTextCache): @synchronized for thread safety
ns_update_end; rebuilds AX tree on window layout changes. of visibleRuns/cachedText accessed from AX server thread.
(postAccessibilityNotificationsForFrame:): Hybrid notification strategy: (accessibilityIndexForCharpos:, charposForAccessibilityIndex:):
SelectedTextChanged for word/line/selection (VoiceOver reads correctly); Thread-safe index mapping with @synchronized.
AnnouncementRequested for character moves (char AT point, correct for (ns_draw_phys_cursor): UAZoomChangeFocus with MAC_OS_X_VERSION guard.
evil block-cursor mode). Non-focused buffer completion announcements
via 4-step fallback chain. * etc/NEWS: New feature: VoiceOver accessibility on macOS.
--- ---
src/nsterm.h | 108 ++ src/nsterm.h | 108 ++
src/nsterm.m | 2700 +++++++++++++++++++++++++++++++++++++++++++++++--- src/nsterm.m | 2727 +++++++++++++++++++++++++++++++++++++++++++++++---
2 files changed, 2668 insertions(+), 140 deletions(-) 2 files changed, 2693 insertions(+), 142 deletions(-)
diff --git a/src/nsterm.h b/src/nsterm.h diff --git a/src/nsterm.h b/src/nsterm.h
index 7c1ee4c..6455547 100644 index 7c1ee4c..6455547 100644
@@ -168,7 +168,7 @@ index 7c1ee4c..6455547 100644
diff --git a/src/nsterm.m b/src/nsterm.m diff --git a/src/nsterm.m b/src/nsterm.m
index 932d209..5cd6ade 100644 index 932d209..248511b 100644
--- a/src/nsterm.m --- a/src/nsterm.m
+++ b/src/nsterm.m +++ b/src/nsterm.m
@@ -46,6 +46,7 @@ Updated by Christian Limpach (chris@nice.ch) @@ -46,6 +46,7 @@ Updated by Christian Limpach (chris@nice.ch)
@@ -191,7 +191,7 @@ index 932d209..5cd6ade 100644
} }
static void static void
@@ -3232,6 +3238,37 @@ Note that CURSOR_WIDTH is meaningful only for (h)bar cursors. @@ -3232,6 +3238,42 @@ Note that CURSOR_WIDTH is meaningful only for (h)bar cursors.
/* Prevent the cursor from being drawn outside the text area. */ /* Prevent the cursor from being drawn outside the text area. */
r = NSIntersectionRect (r, ns_row_rect (w, glyph_row, TEXT_AREA)); r = NSIntersectionRect (r, ns_row_rect (w, glyph_row, TEXT_AREA));
@@ -207,7 +207,11 @@ index 932d209..5cd6ade 100644
+ view->lastAccessibilityCursorRect = r; + view->lastAccessibilityCursorRect = r;
+ +
+ /* Tell macOS Zoom where the cursor is. UAZoomChangeFocus() + /* Tell macOS Zoom where the cursor is. UAZoomChangeFocus()
+ expects top-left origin (CG coordinate space). */ + expects top-left origin (CG coordinate space).
+ These APIs are available since macOS 10.4 (Universal Access
+ framework, linked via ApplicationServices umbrella). */
+#if defined (MAC_OS_X_VERSION_MIN_REQUIRED) \
+ && MAC_OS_X_VERSION_MIN_REQUIRED >= 101000
+ if (UAZoomEnabled ()) + if (UAZoomEnabled ())
+ { + {
+ NSRect windowRect = [view convertRect:r toView:nil]; + NSRect windowRect = [view convertRect:r toView:nil];
@@ -222,6 +226,7 @@ index 932d209..5cd6ade 100644
+ UAZoomChangeFocus (&cgRect, &cgRect, + UAZoomChangeFocus (&cgRect, &cgRect,
+ kUAZoomFocusTypeInsertionPoint); + kUAZoomFocusTypeInsertionPoint);
+ } + }
+#endif /* MAC_OS_X_VERSION_MIN_REQUIRED >= 101000 */
+ } + }
+ } + }
+#endif +#endif
@@ -229,7 +234,7 @@ index 932d209..5cd6ade 100644
ns_focus (f, NULL, 0); ns_focus (f, NULL, 0);
NSGraphicsContext *ctx = [NSGraphicsContext currentContext]; NSGraphicsContext *ctx = [NSGraphicsContext currentContext];
@@ -6849,207 +6886,2239 @@ - (BOOL)fulfillService: (NSString *)name withArg: (NSString *)arg @@ -6849,213 +6891,2263 @@ - (BOOL)fulfillService: (NSString *)name withArg: (NSString *)arg
/* ========================================================================== /* ==========================================================================
@@ -306,7 +311,8 @@ index 932d209..5cd6ade 100644
- EmacsLayer *layer = (EmacsLayer *)[self layer]; - EmacsLayer *layer = (EmacsLayer *)[self layer];
- [layer release]; - [layer release];
-#endif -#endif
+ struct buffer *oldb = current_buffer; + specpdl_ref count = SPECPDL_INDEX ();
+ record_unwind_current_buffer ();
+ if (b != current_buffer) + if (b != current_buffer)
+ set_buffer_internal_1 (b); + set_buffer_internal_1 (b);
@@ -396,8 +402,7 @@ index 932d209..5cd6ade 100644
+ } + }
- font_panel_result = (NSFont *) [sender convertFont: nsfont]; - font_panel_result = (NSFont *) [sender convertFont: nsfont];
+ if (b != oldb) + unbind_to (count, Qnil);
+ set_buffer_internal_1 (oldb);
- if (font_panel_result) - if (font_panel_result)
- [font_panel_result retain]; - [font_panel_result retain];
@@ -450,7 +455,8 @@ index 932d209..5cd6ade 100644
+ +
+static NSRect +static NSRect
+ns_ax_frame_for_range (struct window *w, EmacsView *view, +ns_ax_frame_for_range (struct window *w, EmacsView *view,
+ ptrdiff_t text_start, NSRange range) + ptrdiff_t charpos_start,
+ ptrdiff_t charpos_len)
{ {
- font_panel_active = NO; - font_panel_active = NO;
+ if (!w || !w->current_matrix || !view) + if (!w || !w->current_matrix || !view)
@@ -458,9 +464,11 @@ index 932d209..5cd6ade 100644
- /* If no font was previously selected, use the currently selected - /* If no font was previously selected, use the currently selected
- font. */ - font. */
+ /* Convert range indices back to buffer charpos. */ + /* charpos_start and charpos_len are already in buffer charpos
+ ptrdiff_t cp_start = text_start + (ptrdiff_t) range.location; + space — the caller maps AX string indices through
+ ptrdiff_t cp_end = cp_start + (ptrdiff_t) range.length; + charposForAccessibilityIndex which handles invisible text. */
+ ptrdiff_t cp_start = charpos_start;
+ ptrdiff_t cp_end = cp_start + charpos_len;
- if (!font_panel_result && FRAME_FONT (emacsframe)) - if (!font_panel_result && FRAME_FONT (emacsframe))
+ struct glyph_matrix *matrix = w->current_matrix; + struct glyph_matrix *matrix = w->current_matrix;
@@ -652,16 +660,18 @@ index 932d209..5cd6ade 100644
- [fm orderFrontFontPanel: NSApp]; - [fm orderFrontFontPanel: NSApp];
+ if (!found) + if (!found)
+ { + {
+ for (ptrdiff_t scan = begv; scan < zv; scan++) + /* Bulk query: get all overlays in the buffer at once.
+ { + Avoids the previous O(n) per-character Foverlays_at loop. */
+ Lisp_Object overlays = Foverlays_at (make_fixnum (scan), Qnil); + Lisp_Object all = Foverlays_in (make_fixnum (begv),
+ make_fixnum (zv));
+ Lisp_Object tail; + Lisp_Object tail;
+ for (tail = overlays; CONSP (tail); tail = XCDR (tail)) + for (tail = all; CONSP (tail); tail = XCDR (tail))
+ { + {
+ Lisp_Object ov = XCAR (tail); + Lisp_Object ov = XCAR (tail);
+ Lisp_Object face = Foverlay_get (ov, Qface); + Lisp_Object face = Foverlay_get (ov, Qface);
+ if (!(EQ (face, faceSym) + if (!(EQ (face, faceSym)
+ || (CONSP (face) && !NILP (Fmemq (faceSym, face))))) + || (CONSP (face)
+ && !NILP (Fmemq (faceSym, face)))))
+ continue; + continue;
+ +
+ ptrdiff_t ov_start = OVERLAY_START (ov); + ptrdiff_t ov_start = OVERLAY_START (ov);
@@ -675,9 +685,7 @@ index 932d209..5cd6ade 100644
+ else if (point > ov_end) + else if (point > ov_end)
+ dist = point - ov_end; + dist = point - ov_end;
+ +
+ if (!found || dist < best_dist + if (!found || dist < best_dist)
+ || (dist == best_dist
+ && (ov_start < point && best_start >= point)))
+ { + {
+ best_start = ov_start; + best_start = ov_start;
+ best_end = ov_end; + best_end = ov_end;
@@ -686,7 +694,6 @@ index 932d209..5cd6ade 100644
+ } + }
+ } + }
+ } + }
+ }
- font_panel_active = YES; - font_panel_active = YES;
- timeout = make_timespec (0, 100000000); - timeout = make_timespec (0, 100000000);
@@ -874,11 +881,11 @@ index 932d209..5cd6ade 100644
+ return [NSString stringWithLispString: he]; + return [NSString stringWithLispString: he];
+ +
+ return @""; + return @"";
+} }
+
+/* Scan visible range of window W for interactive spans. +/* Scan visible range of window W for interactive spans.
+ Returns NSArray<EmacsAccessibilityInteractiveSpan *>. + Returns NSArray<EmacsAccessibilityInteractiveSpan *>.
+
+ Priority when properties overlap: + Priority when properties overlap:
+ widget > button > follow-link > org-link > + widget > button > follow-link > org-link >
+ completion-candidate > keymap-overlay. */ + completion-candidate > keymap-overlay. */
@@ -888,7 +895,9 @@ index 932d209..5cd6ade 100644
+{ +{
+ if (!w) + if (!w)
+ return @[]; + return @[];
+
-/*****************************************************************************/
-/* Keyboard handling. */
+ Lisp_Object buf_obj = ns_ax_window_buffer_object (w); + Lisp_Object buf_obj = ns_ax_window_buffer_object (w);
+ if (NILP (buf_obj)) + if (NILP (buf_obj))
+ return @[]; + return @[];
@@ -1250,6 +1259,8 @@ index 932d209..5cd6ade 100644
+ +
+- (void)invalidateTextCache +- (void)invalidateTextCache
+{ +{
+ @synchronized (self)
+ {
+ [cachedText release]; + [cachedText release];
+ cachedText = nil; + cachedText = nil;
+ if (visibleRuns) + if (visibleRuns)
@@ -1258,11 +1269,13 @@ index 932d209..5cd6ade 100644
+ visibleRuns = NULL; + visibleRuns = NULL;
+ } + }
+ visibleRunCount = 0; + visibleRunCount = 0;
+ }
+ [self invalidateInteractiveSpans]; + [self invalidateInteractiveSpans];
+} +}
+ +
+- (void)ensureTextCache +- (void)ensureTextCache
+{ +{
+ NSTRACE ("EmacsAccessibilityBuffer ensureTextCache");
+ struct window *w = [self validWindow]; + struct window *w = [self validWindow];
+ if (!w || !WINDOW_LEAF_P (w)) + if (!w || !WINDOW_LEAF_P (w))
+ return; + return;
@@ -1274,6 +1287,10 @@ index 932d209..5cd6ade 100644
+ ptrdiff_t modiff = BUF_MODIFF (b); + ptrdiff_t modiff = BUF_MODIFF (b);
+ ptrdiff_t pt = BUF_PT (b); + ptrdiff_t pt = BUF_PT (b);
+ NSUInteger textLen = cachedText ? [cachedText length] : 0; + NSUInteger textLen = cachedText ? [cachedText length] : 0;
+ /* TODO: Also track BUF_OVERLAY_MODIFF to catch overlay-only
+ changes (e.g., timer-based completion highlight move without
+ point change). Currently, overlay changes without text edits
+ are detected only when point also moves. */
+ if (cachedText && cachedTextModiff == modiff + if (cachedText && cachedTextModiff == modiff
+ && pt >= cachedTextStart + && pt >= cachedTextStart
+ && (textLen == 0 + && (textLen == 0
@@ -1285,6 +1302,8 @@ index 932d209..5cd6ade 100644
+ NSUInteger nruns = 0; + NSUInteger nruns = 0;
+ NSString *text = ns_ax_buffer_text (w, &start, &runs, &nruns); + NSString *text = ns_ax_buffer_text (w, &start, &runs, &nruns);
+ +
+ @synchronized (self)
+ {
+ [cachedText release]; + [cachedText release];
+ cachedText = [text retain]; + cachedText = [text retain];
+ cachedTextModiff = modiff; + cachedTextModiff = modiff;
@@ -1295,17 +1314,18 @@ index 932d209..5cd6ade 100644
+ visibleRuns = runs; + visibleRuns = runs;
+ visibleRunCount = nruns; + visibleRunCount = nruns;
+ } + }
+}
+ +
+/* ---- Index mapping ---- */ +/* ---- Index mapping ---- */
+ +
+/* Convert buffer charpos to accessibility string index. */ +/* Convert buffer charpos to accessibility string index. */
+- (NSUInteger)accessibilityIndexForCharpos:(ptrdiff_t)charpos +- (NSUInteger)accessibilityIndexForCharpos:(ptrdiff_t)charpos
+{ +{
+ /* This method may be called from the AX server thread. All data + /* This method may be called from the AX server thread.
+ read here (visibleRuns, cachedText) is built on the main thread + Synchronize on self to prevent use-after-free if the main
+ inside ensureTextCache / ns_ax_buffer_text and is only invalidated + thread invalidates the text cache concurrently. */
+ on the main thread. No Lisp calls are made here. */ + @synchronized (self)
+ + {
+ for (NSUInteger i = 0; i < visibleRunCount; i++) + for (NSUInteger i = 0; i < visibleRunCount; i++)
+ { + {
+ ns_ax_visible_run *r = &visibleRuns[i]; + ns_ax_visible_run *r = &visibleRuns[i];
@@ -1342,6 +1362,7 @@ index 932d209..5cd6ade 100644
+ return last->ax_start + last->ax_length; + return last->ax_start + last->ax_length;
+ } + }
+ return 0; + return 0;
+ } /* @synchronized */
+} +}
+ +
+/* Convert accessibility string index to buffer charpos. +/* Convert accessibility string index to buffer charpos.
@@ -1349,6 +1370,9 @@ index 932d209..5cd6ade 100644
+ visibleRuns — no Lisp calls. */ + visibleRuns — no Lisp calls. */
+- (ptrdiff_t)charposForAccessibilityIndex:(NSUInteger)ax_idx +- (ptrdiff_t)charposForAccessibilityIndex:(NSUInteger)ax_idx
+{ +{
+ /* May be called from AX server thread — synchronize. */
+ @synchronized (self)
+ {
+ for (NSUInteger i = 0; i < visibleRunCount; i++) + for (NSUInteger i = 0; i < visibleRunCount; i++)
+ { + {
+ ns_ax_visible_run *r = &visibleRuns[i]; + ns_ax_visible_run *r = &visibleRuns[i];
@@ -1379,6 +1403,7 @@ index 932d209..5cd6ade 100644
+ return last->charpos + last->length; + return last->charpos + last->length;
+ } + }
+ return cachedTextStart; + return cachedTextStart;
+ } /* @synchronized */
+} +}
+ +
+/* ---- NSAccessibility protocol ---- */ +/* ---- NSAccessibility protocol ---- */
@@ -1746,8 +1771,8 @@ index 932d209..5cd6ade 100644
+ ptrdiff_t cp_start = [self charposForAccessibilityIndex:range.location]; + ptrdiff_t cp_start = [self charposForAccessibilityIndex:range.location];
+ ptrdiff_t cp_end = [self charposForAccessibilityIndex: + ptrdiff_t cp_end = [self charposForAccessibilityIndex:
+ range.location + range.length]; + range.location + range.length];
+ NSRange charRange = NSMakeRange (0, (NSUInteger) (cp_end - cp_start)); + return ns_ax_frame_for_range (w, view, cp_start,
+ return ns_ax_frame_for_range (w, view, cp_start, charRange); + cp_end - cp_start);
+} +}
+ +
+- (NSRange)accessibilityRangeForPosition:(NSPoint)screenPoint +- (NSRange)accessibilityRangeForPosition:(NSPoint)screenPoint
@@ -2606,10 +2631,16 @@ index 932d209..5cd6ade 100644
+#endif +#endif
+ [currentCursor setOnMouseEntered: YES]; + [currentCursor setOnMouseEntered: YES];
+#endif +#endif
} +}
+
+
+
+/*****************************************************************************/
+/* Keyboard handling. */
#define NS_KEYLOG 0
- (void)keyDown: (NSEvent *)theEvent
@@ -8237,6 +10306,31 @@ - (void)windowDidBecomeKey /* for direct calls */ @@ -8237,6 +10329,31 @@ - (void)windowDidBecomeKey /* for direct calls */
XSETFRAME (event.frame_or_window, emacsframe); XSETFRAME (event.frame_or_window, emacsframe);
kbd_buffer_store_event (&event); kbd_buffer_store_event (&event);
ns_send_appdefined (-1); // Kick main loop ns_send_appdefined (-1); // Kick main loop
@@ -2641,7 +2672,7 @@ index 932d209..5cd6ade 100644
} }
@@ -9474,6 +11568,320 @@ - (int) fullscreenState @@ -9474,6 +11591,320 @@ - (int) fullscreenState
return fs_state; return fs_state;
} }
@@ -2962,7 +2993,7 @@ index 932d209..5cd6ade 100644
@end /* EmacsView */ @end /* EmacsView */
@@ -11303,6 +13711,18 @@ Convert an X font name (XLFD) to an NS font name. @@ -11303,6 +13734,18 @@ Convert an X font name (XLFD) to an NS font name.
DEFSYM (Qns_drag_operation_generic, "ns-drag-operation-generic"); DEFSYM (Qns_drag_operation_generic, "ns-drag-operation-generic");
DEFSYM (Qns_handle_drag_motion, "ns-handle-drag-motion"); DEFSYM (Qns_handle_drag_motion, "ns-handle-drag-motion");