Pointer/hover media query support: platform-dependent changes

ui/android/java/src/org/chromium/ui/base/TouchDevice.java

Index: ui/android/java/src/org/chromium/ui/base/TouchDevice.java
diff --git a/ui/android/java/src/org/chromium/ui/base/TouchDevice.java b/ui/android/java/src/org/chromium/ui/base/TouchDevice.java
index 6801655c25e727c4e4654999450e26f046e59a04..e22aca5fc691fef37b03cfa69ae073fe483b4465 100644
--- a/ui/android/java/src/org/chromium/ui/base/TouchDevice.java
+++ b/ui/android/java/src/org/chromium/ui/base/TouchDevice.java
@@ -6,6 +6,7 @@ package org.chromium.ui.base;
 
 import android.content.Context;
 import android.content.pm.PackageManager;
+import android.view.InputDevice;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
@@ -22,8 +23,6 @@ public class TouchDevice {
     private TouchDevice() { }
 
     /**
-     * Returns the number of supported touch points.
-     *
      * @return Maximum supported touch points.
      */
     @CalledByNative
@@ -32,6 +31,7 @@ public class TouchDevice {
         // which only guarantees a minimum number of touch points. Be
         // conservative and return the minimum, checking membership from the
         // highest class down.
+
         if (context.getPackageManager().hasSystemFeature(
                 PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_JAZZHAND)) {
             return 5;
@@ -48,4 +48,50 @@ public class TouchDevice {
             return 0;
         }
     }
+
+    /**
+     * TODO
+     */
+    public enum PointerType {
+        None(1), Coarse(2), Fine(4);
+
+        private int mValue;
+
+        private PointerType(int value) {
+            mValue = value;
+        }
+
+        public int getValue() {
+            return mValue;
+        }
+    }
+
+    /**
+     * @return TODO
+     */
+    @CalledByNative
+    private static int availablePointerTypes(Context context) {
+        int pointerTypesVal = 0;
+
+        for (int deviceId : InputDevice.getDeviceIds()) {
+            int sources = InputDevice.getDevice(deviceId).getSources();
+
+            if (hasSource(sources, InputDevice.SOURCE_JOYSTICK)

[bokan, 2014/11/03 14:28:10]

Is there a cursor associated with a joystick? I've never seen a joystick
interface use a cursor, to me this would be a pointer: none device.

[mustaq, 2014/11/03 17:11:38]

I was considering an old PC-based game I played long ago. Will fix.

+                    || hasSource(sources, InputDevice.SOURCE_MOUSE)
+                    || hasSource(sources, InputDevice.SOURCE_STYLUS)
+                    || hasSource(sources, InputDevice.SOURCE_TRACKBALL)) {
+                pointerTypesVal |= PointerType.Fine.getValue();
+
+            } else if (hasSource(sources, InputDevice.SOURCE_CLASS_POINTER)) {
+                pointerTypesVal |= PointerType.Coarse.getValue();
+
+            }
+        }
+
+        return pointerTypesVal;
+    }
+
+    private static boolean hasSource(int sources, int inputDeviceSource) {
+        return (sources & inputDeviceSource) == inputDeviceSource;
+    }
 }