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| 1 // Copyright (c) 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/gamepad/gamepad_platform_data_fetcher_android.h" |
| 6 |
| 7 #include "base/android/jni_android.h" |
| 8 #include "base/android/jni_array.h" |
| 9 #include "base/android/jni_string.h" |
| 10 #include "base/debug/trace_event.h" |
| 11 #include "base/strings/string_number_conversions.h" |
| 12 #include "base/strings/string_util.h" |
| 13 #include "base/strings/utf_string_conversions.h" |
| 14 |
| 15 #include "jni/GamepadList_jni.h" |
| 16 |
| 17 #include "third_party/WebKit/public/platform/WebGamepads.h" |
| 18 |
| 19 using base::android::AttachCurrentThread; |
| 20 using base::android::CheckException; |
| 21 using base::android::ClearException; |
| 22 using base::android::ConvertJavaStringToUTF8; |
| 23 using base::android::ScopedJavaLocalRef; |
| 24 using blink::WebGamepad; |
| 25 using blink::WebGamepads; |
| 26 |
| 27 namespace content { |
| 28 |
| 29 bool |
| 30 GamepadPlatformDataFetcherAndroid::RegisterGamepadPlatformDataFetcherAndroid( |
| 31 JNIEnv* env) { |
| 32 return RegisterNativesImpl(env); |
| 33 } |
| 34 |
| 35 GamepadPlatformDataFetcherAndroid::GamepadPlatformDataFetcherAndroid() { |
| 36 PauseHint(false); |
| 37 } |
| 38 |
| 39 GamepadPlatformDataFetcherAndroid::~GamepadPlatformDataFetcherAndroid() { |
| 40 PauseHint(true); |
| 41 } |
| 42 |
| 43 void GamepadPlatformDataFetcherAndroid::GetGamepadData( |
| 44 blink::WebGamepads* pads, |
| 45 bool devices_changed_hint) { |
| 46 TRACE_EVENT0("GAMEPAD", "GetGamepadData"); |
| 47 |
| 48 pads->length = 0; |
| 49 |
| 50 JNIEnv* env = AttachCurrentThread(); |
| 51 if (!env) |
| 52 return; |
| 53 |
| 54 Java_GamepadList_updateGamepadData(env, reinterpret_cast<intptr_t>(pads)); |
| 55 } |
| 56 |
| 57 void GamepadPlatformDataFetcherAndroid::PauseHint(bool paused) { |
| 58 JNIEnv* env = AttachCurrentThread(); |
| 59 if (!env) |
| 60 return; |
| 61 |
| 62 Java_GamepadList_notifyForGamepadsAccess(env, paused); |
| 63 } |
| 64 |
| 65 static void SetGamepadData(JNIEnv* env, |
| 66 jobject obj, |
| 67 jlong gamepads, |
| 68 jint index, |
| 69 jboolean mapping, |
| 70 jboolean connected, |
| 71 jstring devicename, |
| 72 jlong timestamp, |
| 73 jfloatArray jaxes, |
| 74 jfloatArray jbuttons) { |
| 75 DCHECK(gamepads); |
| 76 blink::WebGamepads* pads = reinterpret_cast<WebGamepads*>(gamepads); |
| 77 DCHECK_EQ(pads->length, unsigned(index)); |
| 78 DCHECK_LT(unsigned(index), WebGamepads::itemsLengthCap); |
| 79 |
| 80 ++pads->length; |
| 81 |
| 82 blink::WebGamepad& pad = pads->items[index]; |
| 83 |
| 84 pad.connected = connected; |
| 85 |
| 86 pad.timestamp = timestamp; |
| 87 |
| 88 // Do not set gamepad parameters for all the gamepad devices that are not |
| 89 // attached. |
| 90 if (!connected) |
| 91 return; |
| 92 |
| 93 // Map the Gamepad DeviceName String to the WebGamepad Id. Ideally it should |
| 94 // be mapped to vendor and product information but it is only available at |
| 95 // kernel level and it can not be queried using class |
| 96 // android.hardware.input.InputManager. |
| 97 // TODO(SaurabhK): Store a cached WebGamePad object in |
| 98 // GamepadPlatformDataFetcherAndroid and only update constant WebGamepad |
| 99 // values when a device has changed. |
| 100 base::string16 device_name; |
| 101 base::android::ConvertJavaStringToUTF16(env, devicename, &device_name); |
| 102 const size_t name_to_copy = |
| 103 std::min(device_name.size(), WebGamepad::idLengthCap - 1); |
| 104 memcpy(pad.id, |
| 105 device_name.data(), |
| 106 name_to_copy * sizeof(base::string16::value_type)); |
| 107 pad.id[name_to_copy] = 0; |
| 108 |
| 109 base::string16 mapping_name = base::UTF8ToUTF16(mapping ? "standard" : ""); |
| 110 const size_t mapping_to_copy = |
| 111 std::min(mapping_name.size(), WebGamepad::mappingLengthCap - 1); |
| 112 memcpy(pad.mapping, |
| 113 mapping_name.data(), |
| 114 mapping_to_copy * sizeof(base::string16::value_type)); |
| 115 pad.mapping[mapping_to_copy] = 0; |
| 116 |
| 117 pad.timestamp = timestamp; |
| 118 |
| 119 std::vector<float> axes; |
| 120 base::android::JavaFloatArrayToFloatVector(env, jaxes, &axes); |
| 121 |
| 122 // Set WebGamepad axeslength to total number of axes on the gamepad device. |
| 123 // Only return the first axesLengthCap if axeslength captured by GamepadList |
| 124 // is larger than axesLengthCap. |
| 125 pad.axesLength = std::min(axes.size(), WebGamepad::axesLengthCap); |
| 126 |
| 127 memcpy(pad.axes, axes.begin(), pad.axesLength * sizeof(float)); |
| 128 |
| 129 std::vector<float> buttons; |
| 130 base::android::JavaFloatArrayToFloatVector(env, jbuttons, &buttons); |
| 131 |
| 132 // Set WebGamepad buttonslength to total number of axes on the gamepad |
| 133 // device. Only return the first buttonsLengthCap if axeslength captured by |
| 134 // GamepadList is larger than buttonsLengthCap. |
| 135 pad.buttonsLength = std::min(buttons.size(), WebGamepad::buttonsLengthCap); |
| 136 |
| 137 // Copy buttons state to the WebGamepad buttons[]. |
| 138 for (unsigned int j = 0; j < pad.buttonsLength; j++) { |
| 139 pad.buttons[j].pressed = buttons[j]; |
| 140 pad.buttons[j].value = buttons[j]; |
| 141 } |
| 142 } |
| 143 |
| 144 } // namespace content |
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