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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, "thickness")) {
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