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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "content/browser/android/gamepad_reader_impl.h" | |
6 | |
7 #include "base/android/jni_android.h" | |
8 #include "base/android/jni_string.h" | |
9 #include "base/strings/string_number_conversions.h" | |
10 #include "base/strings/string_util.h" | |
11 #include "base/strings/utf_string_conversions.h" | |
12 | |
13 #include "jni/GamepadList_jni.h" | |
14 | |
15 using base::android::AttachCurrentThread; | |
16 using base::android::CheckException; | |
17 using base::android::ClearException; | |
18 using base::android::ConvertJavaStringToUTF8; | |
19 using base::android::ScopedJavaLocalRef; | |
20 using blink::WebGamepad; | |
21 using blink::WebGamepads; | |
22 | |
23 namespace content { | |
24 | |
25 bool GamepadsReader::RegisterGamepadsReader(JNIEnv* env) { | |
26 return RegisterNativesImpl(env); | |
27 } | |
28 | |
29 GamepadsReader::GamepadsReader() { | |
30 JNIEnv* env = AttachCurrentThread(); | |
31 CreateJavaObject(env); | |
32 } | |
33 | |
34 GamepadsReader::~GamepadsReader() { CHECK(java_gamepadList_object_.is_null()); } | |
35 | |
36 GamepadsReader* GamepadsReader::GetInstance() { | |
37 return Singleton<GamepadsReader>::get(); | |
38 } | |
39 | |
40 void GamepadsReader::GetGamepadData(blink::WebGamepads* pads) { | |
41 JNIEnv* env = AttachCurrentThread(); | |
42 if (!env) | |
43 return; | |
44 | |
45 gamepads_data_ = pads; | |
46 Java_GamepadList_getGamepadData(env, java_gamepadList_object_.obj()); | |
47 } | |
48 | |
49 void GamepadsReader::UpdateDeviceCount(JNIEnv* env, | |
50 jobject obj, | |
51 int devicecount) { | |
52 gamepads_data_->length = devicecount; | |
53 } | |
54 | |
55 void GamepadsReader::SetGamepadData(JNIEnv* env, | |
56 jobject obj, | |
57 int index, | |
58 jstring mapping, | |
59 bool connected, | |
60 jstring devicename, | |
61 int64 timestamp, | |
62 jfloatArray jaxes, | |
63 jfloatArray jbuttons) { | |
64 | |
65 blink::WebGamepad& pad = gamepads_data_->items[index]; | |
66 pad.connected = connected; | |
67 | |
68 pad.timestamp = timestamp; | |
69 | |
70 // Do not set gamepad parameters for all the gamepad devices that are not | |
71 // attached. | |
72 if (!connected) | |
73 return; | |
74 | |
75 // Map the Gamepad DeviceName String to the WebGamepad Id. Ideally it should | |
76 // be mapped to vendor and product information but it is only available at | |
77 // kernel level and it can not be queried using class | |
78 // android.hardware.input.InputManager. | |
79 | |
80 base::string16 device_name; | |
81 base::android::ConvertJavaStringToUTF16(env, devicename, &device_name); | |
82 const size_t name_to_copy = | |
83 std::min(device_name.size(), WebGamepad::idLengthCap - 1); | |
84 memcpy(pad.id, device_name.data(), name_to_copy); | |
85 pad.id[name_to_copy] = 0; | |
86 pad.id[name_to_copy] = 0; | |
jdduke (slow)
2014/03/18 09:43:15
Looks like we have an extra assignment here, also
SaurabhK
2014/03/18 12:45:30
On 2014/03/18 09:43:15, jdduke wrote:
Oh yes, som
| |
87 | |
88 base::string16 mapping_name; | |
89 base::android::ConvertJavaStringToUTF16(env, devicename, &mapping_name); | |
90 const size_t mapping_to_copy = | |
91 std::min(mapping_name.size(), WebGamepad::mappingLengthCap - 1); | |
92 memcpy(pad.mapping, mapping_name.data(), mapping_to_copy); | |
93 pad.mapping[mapping_to_copy] = 0; | |
94 pad.mapping[mapping_to_copy] = 0; | |
95 | |
96 pad.timestamp = timestamp; | |
97 | |
98 std::vector<float> axes; | |
99 base::android::JavaFloatArrayToFloatVector(env, jaxes, &axes); | |
100 | |
101 // Set WebGamepad axeslength to total number of axes on the gamepad device. | |
102 // Only return the first axesLengthCap if axeslength captured by GamepadList | |
103 // is larger than axesLengthCap. | |
104 pad.axesLength = (axes.size() > WebGamepad::axesLengthCap) | |
jdduke (slow)
2014/03/18 09:43:15
Why not std::min?
SaurabhK
2014/03/18 12:45:30
On 2014/03/18 09:43:15, jdduke wrote:
Using it no
| |
105 ? WebGamepad::axesLengthCap | |
106 : axes.size(); | |
107 memcpy(pad.axes, axes.begin(), pad.axesLength * sizeof(float)); | |
108 | |
109 std::vector<float> buttons; | |
110 base::android::JavaFloatArrayToFloatVector(env, jbuttons, &buttons); | |
111 | |
112 // Set WebGamepad buttonslength to total number of axes on the gamepad | |
113 // device. Only return the first buttonsLengthCap if axeslength captured by | |
114 // GamepadList is larger than buttonsLengthCap. | |
115 | |
116 pad.buttonsLength = (buttons.size() > WebGamepad::buttonsLengthCap) | |
jdduke (slow)
2014/03/18 09:43:15
Also std::min.
SaurabhK
2014/03/18 12:45:30
On 2014/03/18 09:43:15, jdduke wrote:
Chainging i
| |
117 ? WebGamepad::buttonsLengthCap | |
118 : buttons.size(); | |
119 // Copy buttons state to the WebGamepad buttons[]. | |
120 for (unsigned int j = 0; j < pad.buttonsLength; j++) { | |
121 pad.buttons[j].pressed = buttons[j]; | |
122 pad.buttons[j].value = buttons[j]; | |
123 } | |
124 } | |
125 | |
126 void GamepadsReader::NotifyForGamepadsAccess(bool access_paused) { | |
127 JNIEnv* env = AttachCurrentThread(); | |
128 if (!env) | |
129 return; | |
130 | |
131 CHECK(!java_gamepadList_object_.is_null()); | |
132 Java_GamepadList_notifyForGamepadsAccess( | |
133 env, java_gamepadList_object_.obj(), access_paused); | |
134 } | |
135 | |
136 void GamepadsReader::CreateJavaObject(JNIEnv* env) { | |
137 // Create the Java GamepadsReader object and attach it with GamepadList | |
138 // object. | |
139 java_gamepadList_object_.Reset( | |
140 Java_GamepadList_getInstance(env, reinterpret_cast<intptr_t>(this))); | |
141 CHECK(!java_gamepadList_object_.is_null()); | |
142 } | |
143 | |
144 } // namespace content | |
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