Support non-orientation aware keyboards and other devices.

Fixed a bug with dpad keys on external keyboards being rotated
according to the display orientation by adding a new input device
configuration property called "keyboard.orientationAware".

Added a mechanism for overriding the key layout and key character
map in the input device configuration file using the new
"keyboard.layout" and "keyboard.characterMap" properties.

Also added "trackball.orientationAware", "touch.orientationAware" and
"touch.deviceType" configuration properties.

Rewrote the configuration property reading code in native code
so that it can be used by EventHub and other components.

Added basic support for installable idc, kl, and kcm files
in /data/system/devices.  However, there is no provision for
copying files there yet.

Disabled long-press character pickers on full keyboards so that
key repeating works as expected.

Change-Id: I1bd9f0c3d344421db444e7d271eb09bc8bab4791

1 files changed, 75 insertions, 4 deletions

diff --git a/libs/ui/Input.cpp b/libs/ui/Input.cpp
index 944a79b..9e697db 100644
--- a/libs/ui/Input.cpp
+++ b/libs/ui/Input.cpp
@@ -7,11 +7,82 @@
 
 //#define LOG_NDEBUG 0
 
+#define DEBUG_PROBE 0
+
+#include <stdlib.h>
+#include <unistd.h>
+
 #include <ui/Input.h>
 
 namespace android {
 
-// class InputEvent
+static const char* CONFIGURATION_FILE_DIR[] = {
+        "idc/",
+        "keylayout/",
+        "keychars/",
+};
+
+static const char* CONFIGURATION_FILE_EXTENSION[] = {
+        ".idc",
+        ".kl",
+        ".kcm",
+};
+
+static void appendInputDeviceConfigurationFileRelativePath(String8& path,
+        const String8& name, InputDeviceConfigurationFileType type) {
+    path.append(CONFIGURATION_FILE_DIR[type]);
+    for (size_t i = 0; i < name.length(); i++) {
+        char ch = name[i];
+        if (ch == ' ') {
+            ch = '_';
+        }
+        path.append(&ch, 1);
+    }
+    path.append(CONFIGURATION_FILE_EXTENSION[type]);
+}
+
+extern String8 getInputDeviceConfigurationFilePath(
+        const String8& name, InputDeviceConfigurationFileType type) {
+    // Search system repository.
+    String8 path;
+    path.setTo(getenv("ANDROID_ROOT"));
+    path.append("/usr/");
+    appendInputDeviceConfigurationFileRelativePath(path, name, type);
+#if DEBUG_PROBE
+    LOGD("Probing for system provided input device configuration file: path='%s'", path.string());
+#endif
+    if (!access(path.string(), R_OK)) {
+#if DEBUG_PROBE
+        LOGD("Found");
+#endif
+        return path;
+    }
+
+    // Search user repository.
+    // TODO Should only look here if not in safe mode.
+    path.setTo(getenv("ANDROID_DATA"));
+    path.append("/system/devices/");
+    appendInputDeviceConfigurationFileRelativePath(path, name, type);
+#if DEBUG_PROBE
+    LOGD("Probing for system user input device configuration file: path='%s'", path.string());
+#endif
+    if (!access(path.string(), R_OK)) {
+#if DEBUG_PROBE
+        LOGD("Found");
+#endif
+        return path;
+    }
+
+    // Not found.
+#if DEBUG_PROBE
+    LOGD("Probe failed to find input device configuration file: name='%s', type=%d",
+            name.string(), type);
+#endif
+    return String8();
+}
+
+
+// --- InputEvent ---
 
 void InputEvent::initialize(int32_t deviceId, int32_t source) {
     mDeviceId = deviceId;
@@ -23,7 +94,7 @@ void InputEvent::initialize(const InputEvent& from) {
     mSource = from.mSource;
 }
 
-// class KeyEvent
+// --- KeyEvent ---
 
 bool KeyEvent::hasDefaultAction(int32_t keyCode) {
     switch (keyCode) {
@@ -131,7 +202,7 @@ void KeyEvent::initialize(const KeyEvent& from) {
     mEventTime = from.mEventTime;
 }
 
-// class MotionEvent
+// --- MotionEvent ---
 
 void MotionEvent::initialize(
         int32_t deviceId,
@@ -178,7 +249,7 @@ void MotionEvent::offsetLocation(float xOffset, float yOffset) {
     mYOffset += yOffset;
 }
 
-// class InputDeviceInfo
+// --- InputDeviceInfo ---
 
 InputDeviceInfo::InputDeviceInfo() {
     initialize(-1, String8("uninitialized device info"));