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+/* clang-format off */
+/* -*- Mode: Objective-C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* clang-format on */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#import "MOXMathAccessibles.h"
+
+#import "MacUtils.h"
+
+using namespace mozilla::a11y;
+
+// XXX WebKit also defines the following attributes.
+// See bugs 1176970 and 1176983.
+// - NSAccessibilityMathFencedOpenAttribute @"AXMathFencedOpen"
+// - NSAccessibilityMathFencedCloseAttribute @"AXMathFencedClose"
+// - NSAccessibilityMathPrescriptsAttribute @"AXMathPrescripts"
+// - NSAccessibilityMathPostscriptsAttribute @"AXMathPostscripts"
+
+@implementation MOXMathRootAccessible
+
+- (id)moxMathRootRadicand {
+ return [self childAt:0];
+}
+
+- (id)moxMathRootIndex {
+ return [self childAt:1];
+}
+
+@end
+
+@implementation MOXMathSquareRootAccessible
+
+- (id)moxMathRootRadicand {
+ return [self childAt:0];
+}
+
+@end
+
+@implementation MOXMathFractionAccessible
+
+- (id)moxMathFractionNumerator {
+ return [self childAt:0];
+}
+
+- (id)moxMathFractionDenominator {
+ return [self childAt:1];
+}
+
+// Bug 1639745: This doesn't actually work.
+- (NSNumber*)moxMathLineThickness {
+ // WebKit sets line thickness to some logical value parsed in the
+ // renderer object of the <mfrac> element. It's not clear whether the
+ // exact value is relevant to assistive technologies. From a semantic
+ // point of view, the only important point is to distinguish between
+ // <mfrac> elements that have a fraction bar and those that do not.
+ // Per the MathML 3 spec, the latter happens iff the linethickness
+ // attribute is of the form [zero-float][optional-unit]. In that case we
+ // set line thickness to zero and in the other cases we set it to one.
+ if (NSString* thickness =
+ utils::GetAccAttr(self, nsGkAtoms::linethickness_)) {
+ NSNumberFormatter* formatter =
+ [[[NSNumberFormatter alloc] init] autorelease];
+ NSNumber* value = [formatter numberFromString:thickness];
+ return [NSNumber numberWithBool:[value boolValue]];
+ } else {
+ return [NSNumber numberWithInteger:0];
+ }
+}
+
+@end
+
+@implementation MOXMathSubSupAccessible
+- (id)moxMathBase {
+ return [self childAt:0];
+}
+
+- (id)moxMathSubscript {
+ if (mRole == roles::MATHML_SUP) {
+ return nil;
+ }
+
+ return [self childAt:1];
+}
+
+- (id)moxMathSuperscript {
+ if (mRole == roles::MATHML_SUB) {
+ return nil;
+ }
+
+ return [self childAt:mRole == roles::MATHML_SUP ? 1 : 2];
+}
+
+@end
+
+@implementation MOXMathUnderOverAccessible
+- (id)moxMathBase {
+ return [self childAt:0];
+}
+
+- (id)moxMathUnder {
+ if (mRole == roles::MATHML_OVER) {
+ return nil;
+ }
+
+ return [self childAt:1];
+}
+
+- (id)moxMathOver {
+ if (mRole == roles::MATHML_UNDER) {
+ return nil;
+ }
+
+ return [self childAt:mRole == roles::MATHML_OVER ? 1 : 2];
+}
+@end