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 |
new file mode 100644 |
index 0000000000000000000000000000000000000000..6801655c25e727c4e4654999450e26f046e59a04 |
--- /dev/null |
+++ b/ui/android/java/src/org/chromium/ui/base/TouchDevice.java |
@@ -0,0 +1,51 @@ |
+// Copyright 2014 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+package org.chromium.ui.base; |
+ |
+import android.content.Context; |
+import android.content.pm.PackageManager; |
+ |
+import org.chromium.base.CalledByNative; |
+import org.chromium.base.JNINamespace; |
+ |
+/** |
+ * Simple proxy to let us query the touch device from C++ |
+ */ |
+@JNINamespace("ui") |
+public class TouchDevice { |
+ |
+ /** |
+ * Static methods only so make constructor private. |
+ */ |
+ private TouchDevice() { } |
+ |
+ /** |
+ * Returns the number of supported touch points. |
+ * |
+ * @return Maximum supported touch points. |
+ */ |
+ @CalledByNative |
+ private static int maxTouchPoints(Context context) { |
+ // Android only tells us if the device belongs to a "Touchscreen Class" |
+ // 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; |
+ } else if (context.getPackageManager().hasSystemFeature( |
+ PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) { |
+ return 2; |
+ } else if (context.getPackageManager().hasSystemFeature( |
+ PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH)) { |
+ return 2; |
+ } else if (context.getPackageManager().hasSystemFeature( |
+ PackageManager.FEATURE_TOUCHSCREEN)) { |
+ return 1; |
+ } else { |
+ return 0; |
+ } |
+ } |
+} |