v13.3: restore typing echo + add full text protocol on EmacsView

Key changes:
- Typing echo notifications back in ns_draw_window_cursor (on EmacsView,
  synchronous with cursor draw — this is how v9 did it and it worked)
- Rich userInfo: AXTextEditType=3, AXTextChangeValues with actual char
- SelectedTextChangedNotification on every cursor draw
- Full text protocol on EmacsView: accessibilityNumberOfCharacters,
  accessibilitySelectedText, accessibilityInsertionPointLineNumber,
  accessibilityVisibleCharacterRange, accessibilityLineForIndex:,
  accessibilityRangeForLine:, accessibilityAttributedStringForRange:
- accessibilityAttributedStringForRange: on EmacsAccessibilityBuffer too
- Virtual tree kept for VoiceOver window/buffer detection

patches/0001-ns-implement-AXBoundsForRange-for-macOS-Zoom-cursor-.patch

@@ -2,7 +2,7 @@ From: Martin Sukany <martin@sukany.cz>
 Date: Wed, 26 Feb 2026 00:00:00 +0100
 Subject: [PATCH] ns: add macOS Zoom cursor tracking and VoiceOver accessibility
 
-Dual accessibility: UAZoomChangeFocus + virtual element tree.
+Dual accessibility: UAZoomChangeFocus + virtual element tree + typing echo.
 MRC compatible (unsafe_unretained, proper retain/release).
 ---
 --- a/src/nsterm.h	2026-02-26 08:46:18.118172281 +0100
@@ -69,7 +69,7 @@ MRC compatible (unsafe_unretained, proper retain/release).
  
  
 --- a/src/nsterm.m	2026-02-26 08:46:18.124172384 +0100
-+++ b/src/nsterm.m	2026-02-26 09:02:44.734005575 +0100
++++ b/src/nsterm.m	2026-02-26 09:23:14.570493387 +0100
 @@ -1104,6 +1104,11 @@
  
    unblock_input ();
@@ -82,7 +82,7 @@ MRC compatible (unsafe_unretained, proper retain/release).
  }
  
  static void
-@@ -3232,6 +3237,38 @@
+@@ -3232,6 +3237,75 @@
    /* Prevent the cursor from being drawn outside the text area.  */
    r = NSIntersectionRect (r, ns_row_rect (w, glyph_row, TEXT_AREA));
  
@@ -98,6 +98,43 @@ MRC compatible (unsafe_unretained, proper retain/release).
 +	/* Store cursor rect for accessibilityBoundsForRange: queries.  */
 +	view->lastAccessibilityCursorRect = r;
 +
++	struct buffer *curbuf
++	  = XBUFFER (XWINDOW (f->selected_window)->contents);
++
++	if (curbuf && BUF_MODIFF (curbuf) != view->lastAccessibilityModiff)
++	  {
++	    /* Buffer content changed — typing echo.  Post ValueChanged
++	       with rich userInfo on the VIEW so VoiceOver can speak.
++	       kAXTextStateChangeTypeEdit = 1, kAXTextEditTypeTyping = 3.  */
++	    view->lastAccessibilityModiff = BUF_MODIFF (curbuf);
++
++	    NSString *changedText = @"";
++	    ptrdiff_t pt = BUF_PT (curbuf);
++	    if (pt > BUF_BEGV (curbuf))
++	      {
++		NSRange charRange = NSMakeRange (
++		  (NSUInteger)(pt - BUF_BEGV (curbuf) - 1), 1);
++		changedText = [view accessibilityStringForRange:charRange];
++		if (!changedText)
++		  changedText = @"";
++	      }
++
++	    NSDictionary *change = @{
++	      @"AXTextEditType": @3,
++	      @"AXTextChangeValue": changedText
++	    };
++	    NSDictionary *userInfo = @{
++	      @"AXTextStateChangeType": @1,
++	      @"AXTextChangeValues": @[change]
++	    };
++	    NSAccessibilityPostNotificationWithUserInfo (
++	      view, NSAccessibilityValueChangedNotification, userInfo);
++	  }
++
++	/* Always notify cursor movement.  */
++	NSAccessibilityPostNotification (
++	  view, NSAccessibilitySelectedTextChangedNotification);
++
 +	/* Tell macOS Zoom where the cursor is.  UAZoomChangeFocus()
 +	   expects top-left origin (CG coordinate space).  */
 +	if (UAZoomEnabled ())
@@ -121,7 +158,7 @@ MRC compatible (unsafe_unretained, proper retain/release).
    ns_focus (f, NULL, 0);
  
    NSGraphicsContext *ctx = [NSGraphicsContext currentContext];
-@@ -6849,6 +6886,631 @@
+@@ -6849,6 +6923,637 @@
  
  /* ==========================================================================
  
@@ -550,6 +587,12 @@ MRC compatible (unsafe_unretained, proper retain/release).
 +  return [text substringWithRange:range];
 +}
 +
++- (NSAttributedString *)accessibilityAttributedStringForRange:(NSRange)range
++{
++  NSString *str = [self accessibilityStringForRange:range];
++  return [[[NSAttributedString alloc] initWithString:str] autorelease];
++}
++
 +- (NSInteger)accessibilityLineForIndex:(NSInteger)index
 +{
 +  struct window *w = self.emacsWindow;
@@ -753,7 +796,7 @@ MRC compatible (unsafe_unretained, proper retain/release).
      EmacsView implementation
  
     ========================================================================== */
-@@ -6889,6 +7551,7 @@
+@@ -6889,6 +7594,7 @@
    [layer release];
  #endif
  
@@ -761,7 +804,7 @@ MRC compatible (unsafe_unretained, proper retain/release).
    [[self menu] release];
    [super dealloc];
  }
-@@ -9474,6 +10137,293 @@
+@@ -9474,6 +10180,391 @@
    return fs_state;
  }
  
@@ -1017,6 +1060,104 @@ MRC compatible (unsafe_unretained, proper retain/release).
 +  return [NSString stringWithLispString:str];
 +}
 +
++- (NSInteger)accessibilityNumberOfCharacters
++{
++  if (!emacsframe)
++    return 0;
++  struct buffer *curbuf
++    = XBUFFER (XWINDOW (emacsframe->selected_window)->contents);
++  if (!curbuf)
++    return 0;
++  ptrdiff_t range = BUF_ZV (curbuf) - BUF_BEGV (curbuf);
++  return (NSInteger) MIN (range, 10000);
++}
++
++- (NSString *)accessibilitySelectedText
++{
++  if (!emacsframe)
++    return @"";
++  struct buffer *curbuf
++    = XBUFFER (XWINDOW (emacsframe->selected_window)->contents);
++  if (!curbuf || NILP (BVAR (curbuf, mark_active)))
++    return @"";
++  return @"";
++}
++
++- (NSInteger)accessibilityInsertionPointLineNumber
++{
++  if (!emacsframe)
++    return 0;
++  struct window *w = XWINDOW (emacsframe->selected_window);
++  if (!w)
++    return 0;
++  return (NSInteger) (w->cursor.vpos);
++}
++
++- (NSRange)accessibilityVisibleCharacterRange
++{
++  if (!emacsframe)
++    return NSMakeRange (0, 0);
++  struct buffer *curbuf
++    = XBUFFER (XWINDOW (emacsframe->selected_window)->contents);
++  if (!curbuf)
++    return NSMakeRange (0, 0);
++  ptrdiff_t range = BUF_ZV (curbuf) - BUF_BEGV (curbuf);
++  return NSMakeRange (0, (NSUInteger) MIN (range, 10000));
++}
++
++- (NSAttributedString *)accessibilityAttributedStringForRange:(NSRange)range
++{
++  NSString *str = [self accessibilityStringForRange:range];
++  return [[[NSAttributedString alloc] initWithString:str] autorelease];
++}
++
++- (NSInteger)accessibilityLineForIndex:(NSInteger)index
++{
++  if (!emacsframe)
++    return 0;
++  struct window *w = XWINDOW (emacsframe->selected_window);
++  if (!w || !w->current_matrix)
++    return 0;
++  struct buffer *curbuf = XBUFFER (w->contents);
++  if (!curbuf)
++    return 0;
++  ptrdiff_t charpos = BUF_BEGV (curbuf) + (ptrdiff_t) index;
++  struct glyph_matrix *matrix = w->current_matrix;
++  for (int i = 0; i < matrix->nrows; i++)
++    {
++      struct glyph_row *row = matrix->rows + i;
++      if (!row->enabled_p)
++	continue;
++      if (MATRIX_ROW_START_CHARPOS (row) <= charpos
++	  && charpos < MATRIX_ROW_END_CHARPOS (row))
++	return (NSInteger) i;
++    }
++  return 0;
++}
++
++- (NSRange)accessibilityRangeForLine:(NSInteger)line
++{
++  if (!emacsframe)
++    return NSMakeRange (0, 0);
++  struct window *w = XWINDOW (emacsframe->selected_window);
++  if (!w || !w->current_matrix)
++    return NSMakeRange (0, 0);
++  struct buffer *curbuf = XBUFFER (w->contents);
++  if (!curbuf)
++    return NSMakeRange (0, 0);
++  struct glyph_matrix *matrix = w->current_matrix;
++  if (line < 0 || line >= matrix->nrows)
++    return NSMakeRange (0, 0);
++  struct glyph_row *row = matrix->rows + line;
++  if (!row->enabled_p)
++    return NSMakeRange (0, 0);
++  ptrdiff_t start = MATRIX_ROW_START_CHARPOS (row) - BUF_BEGV (curbuf);
++  ptrdiff_t end = MATRIX_ROW_END_CHARPOS (row) - BUF_BEGV (curbuf);
++  if (start < 0) start = 0;
++  if (end < start) end = start;
++  return NSMakeRange ((NSUInteger) start, (NSUInteger) (end - start));
++}
++
 +/* ---- Legacy parameterized attribute APIs (Zoom uses these) ---- */
 +
 +- (NSArray *)accessibilityParameterizedAttributeNames
@@ -1055,7 +1196,7 @@ MRC compatible (unsafe_unretained, proper retain/release).
  @end  /* EmacsView */
  
  
-@@ -9941,6 +10891,14 @@
+@@ -9941,6 +11032,14 @@
  
    return [super accessibilityAttributeValue:attribute];
  }