blob: 8a94cc63dd4d1945d8dd4eca51c0f49d0e2772c9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "ui/base/test/scoped_preferred_scroller_style_mac.h"
#import "base/mac/sdk_forward_declarations.h"
#import "base/mac/scoped_objc_class_swizzler.h"
using base::mac::ScopedObjCClassSwizzler;
namespace {
void NotifyStyleChanged() {
[[NSNotificationCenter defaultCenter]
postNotificationName:NSPreferredScrollerStyleDidChangeNotification
object:nil];
}
NSScrollerStyle GetScrollerStyle(bool overlay) {
return overlay ? NSScrollerStyleOverlay : NSScrollerStyleLegacy;
}
} // namespace
// Donates a testing implementation of +[NSScroller preferredScrollerStyle] by
// returning NSScrollerStyleLegacy.
@interface FakeNSScrollerPreferredStyleLegacyDonor : NSObject
@end
@implementation FakeNSScrollerPreferredStyleLegacyDonor
+ (NSInteger)preferredScrollerStyle {
return NSScrollerStyleLegacy;
}
@end
// Donates a testing implementation of +[NSScroller preferredScrollerStyle] by
// returning NSScrollerStyleOverlay.
@interface FakeNSScrollerPreferredStyleOverlayDonor : NSObject
@end
@implementation FakeNSScrollerPreferredStyleOverlayDonor
+ (NSInteger)preferredScrollerStyle {
return NSScrollerStyleOverlay;
}
@end
namespace ui {
namespace test {
ScopedPreferredScrollerStyle::ScopedPreferredScrollerStyle(bool overlay)
: overlay_(overlay) {
if (![NSScroller respondsToSelector:@selector(preferredScrollerStyle)])
return;
NSInteger previous_style = [NSScroller preferredScrollerStyle];
Class style_class = overlay_
? [FakeNSScrollerPreferredStyleOverlayDonor class]
: [FakeNSScrollerPreferredStyleLegacyDonor class];
swizzler_.reset(new ScopedObjCClassSwizzler(
[NSScroller class], style_class, @selector(preferredScrollerStyle)));
if (previous_style != GetScrollerStyle(overlay_))
NotifyStyleChanged();
}
ScopedPreferredScrollerStyle::~ScopedPreferredScrollerStyle() {
if (!swizzler_)
return; // Handle 10.6, which wouldn't have swizzled anything.
swizzler_.reset();
if ([NSScroller preferredScrollerStyle] != GetScrollerStyle(overlay_))
NotifyStyleChanged();
}
} // namespace test
} // namespace ui
|
