fix: add accessibilityBoundsForRange: (new NSAccessibilityProtocol) + isAccessibilityElement

Old parameterized attribute API alone insufficient — macOS Zoom prefers
the new NSAccessibilityProtocol method accessibilityBoundsForRange:.
Also adds isAccessibilityElement returning YES.

Both APIs now implemented for compatibility across macOS versions.

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

@@ -7,23 +7,26 @@ Add NSAccessibilityBoundsForRangeParameterizedAttribute support to
 EmacsView so that macOS Zoom and other accessibility tools can track
 the text cursor position.
 
-This implements accessibilityAttributeValue:forParameter: on EmacsView,
-storing the cursor rect in ns_draw_window_cursor and converting it to
-screen coordinates on demand.
+Implements both the old parameterized attribute API
+(accessibilityAttributeValue:forParameter:) and the new
+NSAccessibilityProtocol (accessibilityBoundsForRange:) so that Zoom
+works on both older and newer macOS versions.
 
 Changes:
 - Add lastAccessibilityCursorRect ivar to EmacsView (nsterm.h)
 - Store cursor rect in ns_draw_window_cursor (nsterm.m)
-- Implement accessibilityParameterizedAttributeNames
-- Implement accessibilityAttributeValue:forParameter: for BoundsForRange
-- Implement accessibilityIsIgnored, accessibilityFocusedUIElement, accessibilityRole
-- EmacsView reports as NSAccessibilityTextAreaRole
+- Implement accessibilityIsIgnored, accessibilityFocusedUIElement
+- Implement accessibilityRole (NSAccessibilityTextAreaRole)
+- Implement isAccessibilityElement (new API, returns YES)
+- Implement accessibilityParameterizedAttributeNames (old API)
+- Implement accessibilityAttributeValue:forParameter: for BoundsForRange (old API)
+- Implement accessibilityBoundsForRange: (new NSAccessibilityProtocol)
 
 See also: https://github.com/nicowillis/Ghostty/issues/4053
 ---
  src/nsterm.h |  3 +++
- src/nsterm.m | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++
- 2 files changed, 71 insertions(+)
+ src/nsterm.m | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 89 insertions(+)
 
 diff --git a/src/nsterm.h b/src/nsterm.h
 index 7c1ee4c..6c1ff34 100644
@@ -59,19 +62,26 @@ index 932d209..c900d71 100644
    ns_focus (f, NULL, 0);
  
    NSGraphicsContext *ctx = [NSGraphicsContext currentContext];
-@@ -9474,6 +9483,65 @@ - (int) fullscreenState
+@@ -9474,6 +9483,83 @@ - (int) fullscreenState
    return fs_state;
  }
  
 +#ifdef NS_IMPL_COCOA
 +/* Accessibility support for macOS Zoom and other assistive tools.
-+   Implements AXBoundsForRange so that cursor tracking works.  */
++   Implements both old (AXBoundsForRange parameterized attribute) and
++   new (accessibilityBoundsForRange:) APIs so cursor tracking works
++   on all macOS versions.  */
 +
 +- (BOOL)accessibilityIsIgnored
 +{
 +  return NO;
 +}
 +
++- (BOOL)isAccessibilityElement
++{
++  return YES;
++}
++
 +- (id)accessibilityFocusedUIElement
 +{
 +  return self;
@@ -82,6 +92,25 @@ index 932d209..c900d71 100644
 +  return NSAccessibilityTextAreaRole;
 +}
 +
++/* New NSAccessibilityProtocol (macOS 10.10+) — preferred by Zoom.  */
++- (NSRect)accessibilityBoundsForRange:(NSRange)range
++{
++  NSRect viewRect = lastAccessibilityCursorRect;
++
++  if (viewRect.size.width < 1)
++    viewRect.size.width = 1;
++  if (viewRect.size.height < 1)
++    viewRect.size.height = 8;
++
++  NSWindow *win = [self window];
++  if (win == nil)
++    return NSZeroRect;
++
++  NSRect windowRect = [self convertRect:viewRect toView:nil];
++  return [win convertRectToScreen:windowRect];
++}
++
++/* Old parameterized attribute API — fallback for older tools.  */
 +- (NSArray *)accessibilityParameterizedAttributeNames
 +{
 +  NSArray *superAttrs = [super accessibilityParameterizedAttributeNames];
@@ -127,4 +156,3 @@ index 932d209..c900d71 100644
  
 -- 
 2.43.0
-