Mouse pointer integration.
Added support for loading the pointer icon from a resource.
Moved the system server related bits of the input manager out
of libui and into libinput since they do not need to be linked into
applications.
Change-Id: Iec11e0725b3add2b905c51f8ea2c3b4b0d1a2d67
diff --git a/services/input/EventHub.h b/services/input/EventHub.h
new file mode 100644
index 0000000..74b7ec5
--- /dev/null
+++ b/services/input/EventHub.h
@@ -0,0 +1,327 @@
+/*
+ * Copyright (C) 2005 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+#ifndef _RUNTIME_EVENT_HUB_H
+#define _RUNTIME_EVENT_HUB_H
+
+#include <ui/Input.h>
+#include <ui/Keyboard.h>
+#include <ui/KeyLayoutMap.h>
+#include <ui/KeyCharacterMap.h>
+#include <ui/VirtualKeyMap.h>
+#include <utils/String8.h>
+#include <utils/threads.h>
+#include <utils/Log.h>
+#include <utils/threads.h>
+#include <utils/List.h>
+#include <utils/Errors.h>
+#include <utils/PropertyMap.h>
+#include <utils/Vector.h>
+
+#include <linux/input.h>
+
+/* These constants are not defined in linux/input.h but they are part of the multitouch
+ * input protocol. */
+
+#define ABS_MT_TOUCH_MAJOR 0x30 /* Major axis of touching ellipse */
+#define ABS_MT_TOUCH_MINOR 0x31 /* Minor axis (omit if circular) */
+#define ABS_MT_WIDTH_MAJOR 0x32 /* Major axis of approaching ellipse */
+#define ABS_MT_WIDTH_MINOR 0x33 /* Minor axis (omit if circular) */
+#define ABS_MT_ORIENTATION 0x34 /* Ellipse orientation */
+#define ABS_MT_POSITION_X 0x35 /* Center X ellipse position */
+#define ABS_MT_POSITION_Y 0x36 /* Center Y ellipse position */
+#define ABS_MT_TOOL_TYPE 0x37 /* Type of touching device (finger, pen, ...) */
+#define ABS_MT_BLOB_ID 0x38 /* Group a set of packets as a blob */
+#define ABS_MT_TRACKING_ID 0x39 /* Unique ID of initiated contact */
+#define ABS_MT_PRESSURE 0x3a /* Pressure on contact area */
+
+#define MT_TOOL_FINGER 0 /* Identifies a finger */
+#define MT_TOOL_PEN 1 /* Identifies a pen */
+
+#define SYN_MT_REPORT 2
+
+/* Convenience constants. */
+
+#define BTN_FIRST 0x100 // first button scancode
+#define BTN_LAST 0x15f // last button scancode
+
+struct pollfd;
+
+namespace android {
+
+/*
+ * A raw event as retrieved from the EventHub.
+ */
+struct RawEvent {
+ nsecs_t when;
+ int32_t deviceId;
+ int32_t type;
+ int32_t scanCode;
+ int32_t keyCode;
+ int32_t value;
+ uint32_t flags;
+};
+
+/* Describes an absolute axis. */
+struct RawAbsoluteAxisInfo {
+ bool valid; // true if the information is valid, false otherwise
+
+ int32_t minValue; // minimum value
+ int32_t maxValue; // maximum value
+ int32_t flat; // center flat position, eg. flat == 8 means center is between -8 and 8
+ int32_t fuzz; // error tolerance, eg. fuzz == 4 means value is +/- 4 due to noise
+
+ inline int32_t getRange() { return maxValue - minValue; }
+
+ inline void clear() {
+ valid = false;
+ minValue = 0;
+ maxValue = 0;
+ flat = 0;
+ fuzz = 0;
+ }
+};
+
+/*
+ * Input device classes.
+ */
+enum {
+ /* The input device is a keyboard. */
+ INPUT_DEVICE_CLASS_KEYBOARD = 0x00000001,
+
+ /* The input device is an alpha-numeric keyboard (not just a dial pad). */
+ INPUT_DEVICE_CLASS_ALPHAKEY = 0x00000002,
+
+ /* The input device is a touchscreen (either single-touch or multi-touch). */
+ INPUT_DEVICE_CLASS_TOUCHSCREEN = 0x00000004,
+
+ /* The input device is a cursor device such as a trackball or mouse. */
+ INPUT_DEVICE_CLASS_CURSOR = 0x00000008,
+
+ /* The input device is a multi-touch touchscreen. */
+ INPUT_DEVICE_CLASS_TOUCHSCREEN_MT= 0x00000010,
+
+ /* The input device is a directional pad (implies keyboard, has DPAD keys). */
+ INPUT_DEVICE_CLASS_DPAD = 0x00000020,
+
+ /* The input device is a gamepad (implies keyboard, has BUTTON keys). */
+ INPUT_DEVICE_CLASS_GAMEPAD = 0x00000040,
+
+ /* The input device has switches. */
+ INPUT_DEVICE_CLASS_SWITCH = 0x00000080,
+};
+
+/*
+ * Grand Central Station for events.
+ *
+ * The event hub aggregates input events received across all known input
+ * devices on the system, including devices that may be emulated by the simulator
+ * environment. In addition, the event hub generates fake input events to indicate
+ * when devices are added or removed.
+ *
+ * The event hub provides a stream of input events (via the getEvent function).
+ * It also supports querying the current actual state of input devices such as identifying
+ * which keys are currently down. Finally, the event hub keeps track of the capabilities of
+ * individual input devices, such as their class and the set of key codes that they support.
+ */
+class EventHubInterface : public virtual RefBase {
+protected:
+ EventHubInterface() { }
+ virtual ~EventHubInterface() { }
+
+public:
+ // Synthetic raw event type codes produced when devices are added or removed.
+ enum {
+ // Sent when a device is added.
+ DEVICE_ADDED = 0x10000000,
+ // Sent when a device is removed.
+ DEVICE_REMOVED = 0x20000000,
+ // Sent when all added/removed devices from the most recent scan have been reported.
+ // This event is always sent at least once.
+ FINISHED_DEVICE_SCAN = 0x30000000,
+ };
+
+ virtual uint32_t getDeviceClasses(int32_t deviceId) const = 0;
+
+ virtual String8 getDeviceName(int32_t deviceId) const = 0;
+
+ virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const = 0;
+
+ virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
+ RawAbsoluteAxisInfo* outAxisInfo) const = 0;
+
+ virtual status_t scancodeToKeycode(int32_t deviceId, int scancode,
+ int32_t* outKeycode, uint32_t* outFlags) const = 0;
+
+ // exclude a particular device from opening
+ // this can be used to ignore input devices for sensors
+ virtual void addExcludedDevice(const char* deviceName) = 0;
+
+ /*
+ * Wait for the next event to become available and return it.
+ * After returning, the EventHub holds onto a wake lock until the next call to getEvent.
+ * This ensures that the device will not go to sleep while the event is being processed.
+ * If the device needs to remain awake longer than that, then the caller is responsible
+ * for taking care of it (say, by poking the power manager user activity timer).
+ */
+ virtual bool getEvent(RawEvent* outEvent) = 0;
+
+ /*
+ * Query current input state.
+ */
+ virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const = 0;
+ virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const = 0;
+ virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const = 0;
+
+ /*
+ * Examine key input devices for specific framework keycode support
+ */
+ virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes, const int32_t* keyCodes,
+ uint8_t* outFlags) const = 0;
+
+ virtual bool hasLed(int32_t deviceId, int32_t led) const = 0;
+ virtual void setLedState(int32_t deviceId, int32_t led, bool on) = 0;
+
+ virtual void getVirtualKeyDefinitions(int32_t deviceId,
+ Vector<VirtualKeyDefinition>& outVirtualKeys) const = 0;
+
+ virtual void dump(String8& dump) = 0;
+};
+
+class EventHub : public EventHubInterface
+{
+public:
+ EventHub();
+
+ status_t errorCheck() const;
+
+ virtual uint32_t getDeviceClasses(int32_t deviceId) const;
+
+ virtual String8 getDeviceName(int32_t deviceId) const;
+
+ virtual void getConfiguration(int32_t deviceId, PropertyMap* outConfiguration) const;
+
+ virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
+ RawAbsoluteAxisInfo* outAxisInfo) const;
+
+ virtual status_t scancodeToKeycode(int32_t deviceId, int scancode,
+ int32_t* outKeycode, uint32_t* outFlags) const;
+
+ virtual void addExcludedDevice(const char* deviceName);
+
+ virtual int32_t getScanCodeState(int32_t deviceId, int32_t scanCode) const;
+ virtual int32_t getKeyCodeState(int32_t deviceId, int32_t keyCode) const;
+ virtual int32_t getSwitchState(int32_t deviceId, int32_t sw) const;
+
+ virtual bool markSupportedKeyCodes(int32_t deviceId, size_t numCodes,
+ const int32_t* keyCodes, uint8_t* outFlags) const;
+
+ virtual bool getEvent(RawEvent* outEvent);
+
+ virtual bool hasLed(int32_t deviceId, int32_t led) const;
+ virtual void setLedState(int32_t deviceId, int32_t led, bool on);
+
+ virtual void getVirtualKeyDefinitions(int32_t deviceId,
+ Vector<VirtualKeyDefinition>& outVirtualKeys) const;
+
+ virtual void dump(String8& dump);
+
+protected:
+ virtual ~EventHub();
+
+private:
+ bool openPlatformInput(void);
+
+ int openDevice(const char *devicePath);
+ int closeDevice(const char *devicePath);
+ int scanDir(const char *dirname);
+ int readNotify(int nfd);
+
+ status_t mError;
+
+ struct Device {
+ Device* next;
+
+ int fd;
+ const int32_t id;
+ const String8 path;
+ const InputDeviceIdentifier identifier;
+
+ uint32_t classes;
+ uint8_t* keyBitmask;
+ String8 configurationFile;
+ PropertyMap* configuration;
+ VirtualKeyMap* virtualKeyMap;
+ KeyMap keyMap;
+
+ Device(int fd, int32_t id, const String8& path, const InputDeviceIdentifier& identifier);
+ ~Device();
+
+ void close();
+ };
+
+ Device* getDeviceLocked(int32_t deviceId) const;
+ bool hasKeycodeLocked(Device* device, int keycode) const;
+
+ int32_t getScanCodeStateLocked(Device* device, int32_t scanCode) const;
+ int32_t getKeyCodeStateLocked(Device* device, int32_t keyCode) const;
+ int32_t getSwitchStateLocked(Device* device, int32_t sw) const;
+ bool markSupportedKeyCodesLocked(Device* device, size_t numCodes,
+ const int32_t* keyCodes, uint8_t* outFlags) const;
+
+ void loadConfiguration(Device* device);
+ status_t loadVirtualKeyMap(Device* device);
+ status_t loadKeyMap(Device* device);
+ void setKeyboardProperties(Device* device, bool builtInKeyboard);
+ void clearKeyboardProperties(Device* device, bool builtInKeyboard);
+
+ // Protect all internal state.
+ mutable Mutex mLock;
+
+ // The actual id of the built-in keyboard, or -1 if none.
+ // EventHub remaps the built-in keyboard to id 0 externally as required by the API.
+ int32_t mBuiltInKeyboardId;
+
+ int32_t mNextDeviceId;
+
+ // Parallel arrays of fds and devices.
+ // First index is reserved for inotify.
+ Vector<struct pollfd> mFds;
+ Vector<Device*> mDevices;
+
+ Device *mOpeningDevices;
+ Device *mClosingDevices;
+
+ bool mOpened;
+ bool mNeedToSendFinishedDeviceScan;
+ List<String8> mExcludedDevices;
+
+ // device ids that report particular switches.
+#ifdef EV_SW
+ int32_t mSwitches[SW_MAX + 1];
+#endif
+
+ static const int INPUT_BUFFER_SIZE = 64;
+ struct input_event mInputBufferData[INPUT_BUFFER_SIZE];
+ size_t mInputBufferIndex;
+ size_t mInputBufferCount;
+ size_t mInputFdIndex;
+};
+
+}; // namespace android
+
+#endif // _RUNTIME_EVENT_HUB_H