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
108
109
110
111
112
113
|
// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/icon_manager.h"
#include <memory>
#include <tuple>
#include "base/functional/bind.h"
#include "base/task/task_runner.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkCanvas.h"
namespace {
void RunCallbackIfNotCanceled(
const base::CancelableTaskTracker::IsCanceledCallback& is_canceled,
IconManager::IconRequestCallback callback,
gfx::Image image) {
if (is_canceled.Run())
return;
std::move(callback).Run(std::move(image));
}
} // namespace
IconManager::IconManager() = default;
IconManager::~IconManager() = default;
gfx::Image* IconManager::LookupIconFromFilepath(const base::FilePath& file_path,
IconLoader::IconSize size,
float scale) {
// Since loading the icon is synchronous on Chrome OS (and doesn't require
// disk access), if it hasn't already been loaded, load immediately.
#if BUILDFLAG(IS_CHROMEOS)
gfx::Image* image = DoLookupIconFromFilepath(file_path, size, scale);
if (image)
return image;
IconLoader::LoadIcon(
file_path, size, scale,
base::BindOnce(&IconManager::OnIconLoaded, weak_factory_.GetWeakPtr(),
base::DoNothing(), file_path, size, scale));
#endif
return DoLookupIconFromFilepath(file_path, size, scale);
}
base::CancelableTaskTracker::TaskId IconManager::LoadIcon(
const base::FilePath& file_path,
IconLoader::IconSize size,
float scale,
IconRequestCallback callback,
base::CancelableTaskTracker* tracker) {
base::CancelableTaskTracker::IsCanceledCallback is_canceled;
base::CancelableTaskTracker::TaskId id =
tracker->NewTrackedTaskId(&is_canceled);
IconRequestCallback callback_runner = base::BindOnce(
&RunCallbackIfNotCanceled, is_canceled, std::move(callback));
IconLoader::LoadIcon(
file_path, size, scale,
base::BindOnce(&IconManager::OnIconLoaded, weak_factory_.GetWeakPtr(),
std::move(callback_runner), file_path, size, scale));
return id;
}
gfx::Image* IconManager::DoLookupIconFromFilepath(
const base::FilePath& file_path,
IconLoader::IconSize size,
float scale) {
auto group_it = group_cache_.find(file_path);
if (group_it == group_cache_.end())
return nullptr;
CacheKey key(group_it->second, size, scale);
auto icon_it = icon_cache_.find(key);
if (icon_it == icon_cache_.end())
return nullptr;
return &icon_it->second;
}
void IconManager::OnIconLoaded(IconRequestCallback callback,
base::FilePath file_path,
IconLoader::IconSize size,
float scale,
gfx::Image result,
const IconLoader::IconGroup& group) {
// Cache the bitmap. Watch out: |result| may be null, which indicates a
// failure. We assume that if we have an entry in |icon_cache_| it must not be
// null.
CacheKey key(group, size, scale);
std::move(callback).Run(result);
if (!result.IsEmpty())
icon_cache_[key] = std::move(result);
else
icon_cache_.erase(key);
group_cache_[file_path] = group;
}
IconManager::CacheKey::CacheKey(const IconLoader::IconGroup& group,
IconLoader::IconSize size,
float scale)
: group(group), size(size), scale(scale) {}
bool IconManager::CacheKey::operator<(const CacheKey& other) const {
return std::tie(group, size, scale) <
std::tie(other.group, other.size, other.scale);
}
|
