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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
// Copyright 2013 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.
#include "cc/layers/solid_color_scrollbar_layer.h"
#include <memory>
#include "cc/layers/layer_impl.h"
#include "cc/layers/solid_color_scrollbar_layer_impl.h"
namespace cc {
std::unique_ptr<LayerImpl> SolidColorScrollbarLayer::CreateLayerImpl(
LayerTreeImpl* tree_impl) {
const bool kIsOverlayScrollbar = true;
return SolidColorScrollbarLayerImpl::Create(
tree_impl, id(), solid_color_scrollbar_layer_inputs_.orientation,
solid_color_scrollbar_layer_inputs_.thumb_thickness,
solid_color_scrollbar_layer_inputs_.track_start,
solid_color_scrollbar_layer_inputs_.is_left_side_vertical_scrollbar,
kIsOverlayScrollbar);
}
scoped_refptr<SolidColorScrollbarLayer> SolidColorScrollbarLayer::Create(
ScrollbarOrientation orientation,
int thumb_thickness,
int track_start,
bool is_left_side_vertical_scrollbar,
ElementId scroll_element_id) {
return base::WrapRefCounted(new SolidColorScrollbarLayer(
orientation, thumb_thickness, track_start,
is_left_side_vertical_scrollbar, scroll_element_id));
}
SolidColorScrollbarLayer::SolidColorScrollbarLayerInputs::
SolidColorScrollbarLayerInputs(ScrollbarOrientation orientation,
int thumb_thickness,
int track_start,
bool is_left_side_vertical_scrollbar,
ElementId scroll_element_id)
: scroll_element_id(scroll_element_id),
orientation(orientation),
thumb_thickness(thumb_thickness),
track_start(track_start),
is_left_side_vertical_scrollbar(is_left_side_vertical_scrollbar) {}
SolidColorScrollbarLayer::SolidColorScrollbarLayerInputs::
~SolidColorScrollbarLayerInputs() = default;
SolidColorScrollbarLayer::SolidColorScrollbarLayer(
ScrollbarOrientation orientation,
int thumb_thickness,
int track_start,
bool is_left_side_vertical_scrollbar,
ElementId scroll_element_id)
: solid_color_scrollbar_layer_inputs_(orientation,
thumb_thickness,
track_start,
is_left_side_vertical_scrollbar,
scroll_element_id) {
Layer::SetOpacity(0.f);
SetIsScrollbar(true);
}
SolidColorScrollbarLayer::~SolidColorScrollbarLayer() = default;
void SolidColorScrollbarLayer::SetOpacity(float opacity) {
// The opacity of a solid color scrollbar layer is always 0 on main thread.
DCHECK_EQ(opacity, 0.f);
Layer::SetOpacity(opacity);
}
void SolidColorScrollbarLayer::PushPropertiesTo(LayerImpl* layer) {
Layer::PushPropertiesTo(layer);
SolidColorScrollbarLayerImpl* scrollbar_layer =
static_cast<SolidColorScrollbarLayerImpl*>(layer);
DCHECK(!scrollbar_layer->HitTestable());
scrollbar_layer->SetScrollElementId(
solid_color_scrollbar_layer_inputs_.scroll_element_id);
}
void SolidColorScrollbarLayer::SetNeedsDisplayRect(const gfx::Rect& rect) {
// Never needs repaint.
}
bool SolidColorScrollbarLayer::OpacityCanAnimateOnImplThread() const {
return true;
}
void SolidColorScrollbarLayer::SetScrollElementId(ElementId element_id) {
if (element_id == solid_color_scrollbar_layer_inputs_.scroll_element_id)
return;
solid_color_scrollbar_layer_inputs_.scroll_element_id = element_id;
SetNeedsCommit();
}
bool SolidColorScrollbarLayer::HitTestable() const {
// Android scrollbars can't be interacted with by user input. They should
// avoid hit testing so we don't enter any scrollbar scrolling code paths.
return false;
}
} // namespace cc
|
