Add an option for absolute touch mode

app/src/main/java/com/limelight/binding/input/touch/AbsoluteTouchContext.java

@@ -0,0 +1,272 @@
+package com.limelight.binding.input.touch;
+
+import android.os.SystemClock;
+import android.view.View;
+
+import com.limelight.nvstream.NvConnection;
+import com.limelight.nvstream.input.MouseButtonPacket;
+
+import java.util.Timer;
+import java.util.TimerTask;
+
+public class AbsoluteTouchContext implements TouchContext {
+    private int lastTouchDownX = 0;
+    private int lastTouchDownY = 0;
+    private long lastTouchDownTime = 0;
+    private int lastTouchUpX = 0;
+    private int lastTouchUpY = 0;
+    private long lastTouchUpTime = 0;
+    private int lastTouchLocationX = 0;
+    private int lastTouchLocationY = 0;
+    private boolean cancelled;
+    private boolean confirmedLongPress;
+    private boolean confirmedTap;
+    private Timer longPressTimer;
+    private Timer tapDownTimer;
+    private float accumulatedScrollDelta;
+
+    private final NvConnection conn;
+    private final int actionIndex;
+    private final View targetView;
+
+    private static final int SCROLL_SPEED_DIVISOR = 20;
+
+    private static final int LONG_PRESS_TIME_THRESHOLD = 650;
+    private static final int LONG_PRESS_DISTANCE_THRESHOLD = 30;
+
+    private static final int DOUBLE_TAP_TIME_THRESHOLD = 250;
+    private static final int DOUBLE_TAP_DISTANCE_THRESHOLD = 60;
+
+    private static final int TOUCH_DOWN_DEAD_ZONE_TIME_THRESHOLD = 100;
+    private static final int TOUCH_DOWN_DEAD_ZONE_DISTANCE_THRESHOLD = 20;
+
+    public AbsoluteTouchContext(NvConnection conn, int actionIndex, View view)
+    {
+        this.conn = conn;
+        this.actionIndex = actionIndex;
+        this.targetView = view;
+    }
+
+    @Override
+    public int getActionIndex()
+    {
+        return actionIndex;
+    }
+
+    @Override
+    public boolean touchDownEvent(int eventX, int eventY, boolean isNewFinger)
+    {
+        if (!isNewFinger) {
+            // We don't handle finger transitions for absolute mode
+            return true;
+        }
+
+        lastTouchLocationX = lastTouchDownX = eventX;
+        lastTouchLocationY = lastTouchDownY = eventY;
+        lastTouchDownTime = SystemClock.uptimeMillis();
+        cancelled = confirmedTap = confirmedLongPress = false;
+        accumulatedScrollDelta = 0;
+
+        if (actionIndex == 0) {
+            // Start the timers
+            startTapDownTimer();
+            startLongPressTimer();
+        }
+
+        return true;
+    }
+
+    private boolean distanceExceeds(int deltaX, int deltaY, double limit) {
+        return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2)) > limit;
+    }
+
+    private void updatePosition(int eventX, int eventY) {
+        // We may get values slightly outside our view region on ACTION_HOVER_ENTER and ACTION_HOVER_EXIT.
+        // Normalize these to the view size. We can't just drop them because we won't always get an event
+        // right at the boundary of the view, so dropping them would result in our cursor never really
+        // reaching the sides of the screen.
+        eventX = Math.min(Math.max(eventX, 0), targetView.getWidth());
+        eventY = Math.min(Math.max(eventY, 0), targetView.getHeight());
+
+        conn.sendMousePosition((short)eventX, (short)eventY, (short)targetView.getWidth(), (short)targetView.getHeight());
+    }
+
+    @Override
+    public void touchUpEvent(int eventX, int eventY)
+    {
+        if (cancelled) {
+            return;
+        }
+
+        if (actionIndex == 0) {
+            // Cancel the timers
+            cancelLongPressTimer();
+            cancelTapDownTimer();
+
+            // Raise the mouse buttons that we currently have down
+            if (confirmedLongPress) {
+                conn.sendMouseButtonUp(MouseButtonPacket.BUTTON_RIGHT);
+            }
+            else if (confirmedTap) {
+                conn.sendMouseButtonUp(MouseButtonPacket.BUTTON_LEFT);
+            }
+            else {
+                // If we get here, this means that the tap completed within the touch down
+                // deadzone time. We'll need to send the touch down and up events now at the
+                // original touch down position.
+                tapConfirmed();
+                try {
+                    // FIXME: Sleeping on the main thread sucks
+                    Thread.sleep(50);
+                } catch (InterruptedException ignored) {}
+                conn.sendMouseButtonUp(MouseButtonPacket.BUTTON_LEFT);
+            }
+        }
+
+        lastTouchLocationX = lastTouchUpX = eventX;
+        lastTouchLocationY = lastTouchUpY = eventY;
+        lastTouchUpTime = SystemClock.uptimeMillis();
+    }
+
+    private synchronized void startLongPressTimer() {
+        longPressTimer = new Timer(true);
+        longPressTimer.schedule(new TimerTask() {
+            @Override
+            public void run() {
+                synchronized (AbsoluteTouchContext.this) {
+                    // Check if someone cancelled us
+                    if (longPressTimer == null) {
+                        return;
+                    }
+
+                    // Uncancellable now
+                    longPressTimer = null;
+
+                    // This timer should have already expired, but cancel it just in case
+                    cancelTapDownTimer();
+
+                    // Switch from a left click to a right click after a long press
+                    confirmedLongPress = true;
+                    if (confirmedTap) {
+                        conn.sendMouseButtonUp(MouseButtonPacket.BUTTON_LEFT);
+                    }
+                    conn.sendMouseButtonDown(MouseButtonPacket.BUTTON_RIGHT);
+                }
+            }
+        }, LONG_PRESS_TIME_THRESHOLD);
+    }
+
+    private synchronized void cancelLongPressTimer() {
+        if (longPressTimer != null) {
+            longPressTimer.cancel();
+            longPressTimer = null;
+        }
+    }
+
+    private synchronized void startTapDownTimer() {
+        tapDownTimer = new Timer(true);
+        tapDownTimer.schedule(new TimerTask() {
+            @Override
+            public void run() {
+                synchronized (AbsoluteTouchContext.this) {
+                    // Check if someone cancelled us
+                    if (tapDownTimer == null) {
+                        return;
+                    }
+
+                    // Uncancellable now
+                    tapDownTimer = null;
+
+                    // Start our tap
+                    tapConfirmed();
+                }
+            }
+        }, TOUCH_DOWN_DEAD_ZONE_TIME_THRESHOLD);
+    }
+
+    private synchronized void cancelTapDownTimer() {
+        if (tapDownTimer != null) {
+            tapDownTimer.cancel();
+            tapDownTimer = null;
+        }
+    }
+
+    private void tapConfirmed() {
+        if (confirmedTap || confirmedLongPress) {
+            return;
+        }
+
+        confirmedTap = true;
+        cancelTapDownTimer();
+
+        // Left button down at original position
+        if (lastTouchDownTime - lastTouchUpTime > DOUBLE_TAP_TIME_THRESHOLD ||
+                distanceExceeds(lastTouchDownX - lastTouchUpX, lastTouchDownY - lastTouchUpY, DOUBLE_TAP_DISTANCE_THRESHOLD)) {
+            // Don't reposition for finger down events within the deadzone. This makes double-clicking easier.
+            updatePosition(lastTouchDownX, lastTouchDownY);
+        }
+        conn.sendMouseButtonDown(MouseButtonPacket.BUTTON_LEFT);
+    }
+
+    @Override
+    public boolean touchMoveEvent(int eventX, int eventY)
+    {
+        if (cancelled) {
+            return true;
+        }
+
+        if (actionIndex == 0) {
+            if (distanceExceeds(eventX - lastTouchDownX, eventY - lastTouchDownY, LONG_PRESS_DISTANCE_THRESHOLD)) {
+                // Moved too far since touch down. Cancel the long press timer.
+                cancelLongPressTimer();
+            }
+
+            // Ignore motion within the deadzone period after touch down
+            if (confirmedTap || distanceExceeds(eventX - lastTouchDownX, eventY - lastTouchDownY, TOUCH_DOWN_DEAD_ZONE_DISTANCE_THRESHOLD)) {
+                tapConfirmed();
+                updatePosition(eventX, eventY);
+            }
+        }
+        else if (actionIndex == 1) {
+            accumulatedScrollDelta += (eventY - lastTouchLocationY) / (float)SCROLL_SPEED_DIVISOR;
+            if ((short)accumulatedScrollDelta != 0) {
+                conn.sendMouseHighResScroll((short)accumulatedScrollDelta);
+                accumulatedScrollDelta -= (short)accumulatedScrollDelta;
+            }
+        }
+
+        lastTouchLocationX = eventX;
+        lastTouchLocationY = eventY;
+
+        return true;
+    }
+
+    @Override
+    public void cancelTouch() {
+        cancelled = true;
+
+        // Cancel the timers
+        cancelLongPressTimer();
+        cancelTapDownTimer();
+
+        // Raise the mouse buttons
+        if (confirmedLongPress) {
+            conn.sendMouseButtonUp(MouseButtonPacket.BUTTON_RIGHT);
+        }
+        else if (confirmedTap) {
+            conn.sendMouseButtonUp(MouseButtonPacket.BUTTON_LEFT);
+        }
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setPointerCount(int pointerCount) {
+        if (actionIndex == 0 && pointerCount > 1) {
+            cancelTouch();
+        }
+    }
+}

app/src/main/java/com/limelight/binding/input/touch/RelativeTouchContext.java

@@ -1,5 +1,6 @@
-package com.limelight.binding.input;
+package com.limelight.binding.input.touch;
 
+import android.os.SystemClock;
 import android.view.View;
 
 import com.limelight.nvstream.NvConnection;
@@ -8,7 +9,7 @@ import com.limelight.nvstream.input.MouseButtonPacket;
 import java.util.Timer;
 import java.util.TimerTask;
 
-public class TouchContext {
+public class RelativeTouchContext implements TouchContext {
     private int lastTouchX = 0;
     private int lastTouchY = 0;
     private int originalTouchX = 0;
@@ -32,8 +33,8 @@ public class TouchContext {
     private static final int TAP_TIME_THRESHOLD = 250;
     private static final int DRAG_TIME_THRESHOLD = 650;
 
-    public TouchContext(NvConnection conn, int actionIndex,
-                        int referenceWidth, int referenceHeight, View view)
+    public RelativeTouchContext(NvConnection conn, int actionIndex,
+                                int referenceWidth, int referenceHeight, View view)
     {
         this.conn = conn;
         this.actionIndex = actionIndex;
@@ -42,6 +43,7 @@ public class TouchContext {
         this.targetView = view;
     }
 
+    @Override
     public int getActionIndex()
     {
         return actionIndex;
@@ -57,7 +59,7 @@ public class TouchContext {
 
     private boolean isTap()
     {
-        long timeDelta = System.currentTimeMillis() - originalTouchTime;
+        long timeDelta = SystemClock.uptimeMillis() - originalTouchTime;
 
         return isWithinTapBounds(lastTouchX, lastTouchY) && timeDelta <= TAP_TIME_THRESHOLD;
     }
@@ -72,7 +74,8 @@ public class TouchContext {
         }
     }
 
-    public boolean touchDownEvent(int eventX, int eventY)
+    @Override
+    public boolean touchDownEvent(int eventX, int eventY, boolean isNewFinger)
     {
         // Get the view dimensions to scale inputs on this touch
         xFactor = referenceWidth / (double)targetView.getWidth();
@@ -80,7 +83,7 @@ public class TouchContext {
 
         originalTouchX = lastTouchX = eventX;
         originalTouchY = lastTouchY = eventY;
-        originalTouchTime = System.currentTimeMillis();
+        originalTouchTime = SystemClock.uptimeMillis();
         cancelled = confirmedDrag = confirmedMove = false;
         distanceMoved = 0;
 
@@ -92,6 +95,7 @@ public class TouchContext {
         return true;
     }
 
+    @Override
     public void touchUpEvent(int eventX, int eventY)
     {
         if (cancelled) {
@@ -128,7 +132,7 @@ public class TouchContext {
         dragTimer.schedule(new TimerTask() {
             @Override
             public void run() {
-                synchronized (TouchContext.this) {
+                synchronized (RelativeTouchContext.this) {
                     // Check if someone already set move
                     if (confirmedMove) {
                         return;
@@ -179,6 +183,7 @@ public class TouchContext {
         }
     }
 
+    @Override
     public boolean touchMoveEvent(int eventX, int eventY)
     {
         if (eventX != lastTouchX || eventY != lastTouchY)
@@ -223,6 +228,7 @@ public class TouchContext {
         return true;
     }
 
+    @Override
     public void cancelTouch() {
         cancelled = true;
 
@@ -235,7 +241,11 @@ public class TouchContext {
         }
     }
 
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
+
+    @Override
+    public void setPointerCount(int pointerCount) {}
 }

app/src/main/java/com/limelight/binding/input/touch/TouchContext.java

@@ -0,0 +1,11 @@
+package com.limelight.binding.input.touch;
+
+public interface TouchContext {
+    int getActionIndex();
+    void setPointerCount(int pointerCount);
+    boolean touchDownEvent(int eventX, int eventY, boolean isNewFinger);
+    boolean touchMoveEvent(int eventX, int eventY);
+    void touchUpEvent(int eventX, int eventY);
+    void cancelTouch();
+    boolean isCancelled();
+}