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package invalid.lena.scrcpy;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.view.KeyEvent;
import android.view.MotionEvent;
import java.util.function.Consumer;
// Encodes UI events into scrcpy ControlMessage byte arrays and pushes
// them at ControlStream. Also mirrors the remote clipboard locally and
// echoes local clipboard changes the other way.
//
// Forwards multi-pointer touch and AOSP keycodes. Mouse buttons and
// scroll wheels are not forwarded yet.
public final class Controller implements ControlStream.InboundSink {
private final Consumer<byte[]> sender;
private final ClipboardManager clipboard;
public volatile String lastEvent = "(idle)";
// Held once so add/removePrimaryClipChangedListener see the same
// listener reference. Method references generate fresh lambdas
// each call site and the remove silently no-ops otherwise.
private final ClipboardManager.OnPrimaryClipChangedListener clipListener =
this::onLocalClipboardChanged;
private volatile int targetW, targetH;
private volatile int viewW, viewH;
// Suppress one local clipboard change after we set it from a remote update.
private volatile boolean suppressNextClipChange;
public Controller(Context ctx, Consumer<byte[]> sender) {
this.sender = sender;
this.clipboard = (ClipboardManager) ctx.getSystemService(Context.CLIPBOARD_SERVICE);
if (clipboard != null) {
clipboard.addPrimaryClipChangedListener(clipListener);
}
}
public void release() {
if (clipboard != null) {
try { clipboard.removePrimaryClipChangedListener(clipListener); }
catch (Exception ignored) {}
}
}
public void setTargetSize(int w, int h) {
targetW = w; targetH = h;
Log.i("controller: target %dx%d", w, h);
}
public void setViewSize(int w, int h) {
viewW = w; viewH = h;
}
// ---- inbound ----
@Override
public void onRemoteClipboard(String text) {
Log.i("clipboard from target: %d chars", text.length());
if (clipboard == null) return;
suppressNextClipChange = true;
try {
clipboard.setPrimaryClip(ClipData.newPlainText("scrcpy-android", text));
} catch (Exception e) {
Log.w("clipboard set local failed: %s", e);
suppressNextClipChange = false;
}
}
private void onLocalClipboardChanged() {
if (suppressNextClipChange) {
suppressNextClipChange = false;
return;
}
if (clipboard == null) return;
ClipData data;
try { data = clipboard.getPrimaryClip(); }
catch (Exception e) { Log.w("clipboard get local failed: %s", e); return; }
if (data == null || data.getItemCount() == 0) return;
CharSequence cs = data.getItemAt(0).coerceToText(null);
if (cs == null) return;
sendSetClipboard(cs.toString(), false);
Log.i("clipboard to target: %d chars", cs.length());
}
// ---- outbound ----
public void onTouch(MotionEvent ev) {
int tw = targetW, th = targetH, vw = viewW, vh = viewH;
if (tw == 0 || th == 0 || vw == 0 || vh == 0) return;
// scrcpy's wire protocol uses ACTION_DOWN/UP/MOVE/CANCEL with a
// pointerId per message. The server tracks which pointers are
// currently down. So we translate Android's masked actions:
// ACTION_POINTER_DOWN[i] -> ACTION_DOWN (this pointer joins)
// ACTION_POINTER_UP[i] -> ACTION_UP (this pointer leaves)
// ACTION_MOVE -> ACTION_MOVE for every current pointer
// ACTION_CANCEL -> ACTION_CANCEL for every current pointer
int action = ev.getActionMasked();
int idx = ev.getActionIndex();
int n = ev.getPointerCount();
switch (action) {
case MotionEvent.ACTION_DOWN:
sendPointer(ev, 0, MotionEvent.ACTION_DOWN, tw, th, vw, vh);
break;
case MotionEvent.ACTION_POINTER_DOWN:
sendPointer(ev, idx, MotionEvent.ACTION_DOWN, tw, th, vw, vh);
break;
case MotionEvent.ACTION_UP:
sendPointer(ev, 0, MotionEvent.ACTION_UP, tw, th, vw, vh);
break;
case MotionEvent.ACTION_POINTER_UP:
sendPointer(ev, idx, MotionEvent.ACTION_UP, tw, th, vw, vh);
break;
case MotionEvent.ACTION_MOVE:
for (int i = 0; i < n; i++) sendPointer(ev, i, MotionEvent.ACTION_MOVE, tw, th, vw, vh);
break;
case MotionEvent.ACTION_CANCEL:
for (int i = 0; i < n; i++) sendPointer(ev, i, MotionEvent.ACTION_CANCEL, tw, th, vw, vh);
break;
default:
return;
}
}
// Sizes come from onTouch's snapshot of the volatile fields, so a
// concurrent resize cannot zero a divisor between check and use.
private void sendPointer(MotionEvent ev, int index, int action,
int tw, int th, int vw, int vh) {
long pointerId = ev.getPointerId(index);
int x = (int) ev.getX(index);
int y = (int) ev.getY(index);
int tx = (int) ((long) x * tw / vw);
int ty = (int) ((long) y * th / vh);
// getPressure is calibrated around 1.0 but may exceed it on some
// digitizers; clamp instead of masking so hard presses don't wrap
// around to a light touch.
int pressure = (action == MotionEvent.ACTION_UP) ? 0
: Math.min((int)(ev.getPressure(index) * 0xffff), 0xffff);
sender.accept(ControlMessages.touch(action, pointerId, tx, ty, tw, th,
pressure, /* actionButton */ 0, /* buttons */ 0));
lastEvent = "touch a=" + action + " (" + tx + "," + ty + ")";
}
public void onKey(KeyEvent ev) {
int tw = targetW, th = targetH;
if (tw == 0 || th == 0) return;
int action = ev.getAction(); // ACTION_DOWN=0, ACTION_UP=1
if (action != KeyEvent.ACTION_DOWN && action != KeyEvent.ACTION_UP) return;
sendKeycode(action, ev.getKeyCode(), ev.getRepeatCount(), ev.getMetaState());
}
// Fire a tap of the target's Back. scrcpy server treats the
// BACK_OR_SCREEN_ON message as Back when the target is on, screen-
// on when it's off - useful for waking a locked target too.
public void onBack() {
sender.accept(ControlMessages.backOrScreenOn(ControlMessages.ACTION_DOWN));
sender.accept(ControlMessages.backOrScreenOn(ControlMessages.ACTION_UP));
lastEvent = "back";
}
// ---- encoders (delegate to pure-java ControlMessages) ----
private void sendKeycode(int action, int keycode, int repeat, int metaState) {
sender.accept(ControlMessages.keycode(action, keycode, repeat, metaState));
lastEvent = "key a=" + action + " kc=" + keycode;
}
private void sendSetClipboard(String text, boolean paste) {
try {
sender.accept(ControlMessages.setClipboard(/* sequence */ 0L, paste, text));
lastEvent = "clip " + text.length() + " chars";
} catch (IllegalArgumentException e) {
Log.w("clipboard not sent: %s", e.getMessage());
}
}
}
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