InputFlinger: Add DROP_INPUT and DROP_INPUT_IF_OBSCURED feature flags
If a window has the feature DROP_INPUT set, then all touch and
key events directed to the window will be dropped. For touch events,
the events will not go to the window behind it.
If a window has the feature DROP_INPUT_IF_OBSCURED set, then all
touch and key events directed to the window will be dropped if
the window is considered partially or fully obscured.
These flags are used to enable features that allow for a less trusted
interaction model between apps. See the bug for more details.
Test: atest libgui_test InputDispatcherDropInputFeatureTest
Bug:197364677
Change-Id: I71d7cf5064c8ce4626cff09b92e15ca38b39cbbe
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index 0a91bde..226b547 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -5471,4 +5471,134 @@
mSecondWindow->assertNoEvents();
}
+class InputDispatcherDropInputFeatureTest : public InputDispatcherTest {};
+
+TEST_F(InputDispatcherDropInputFeatureTest, WindowDropsInput) {
+ std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
+ sp<FakeWindowHandle> window =
+ new FakeWindowHandle(application, mDispatcher, "Test window", ADISPLAY_ID_DEFAULT);
+ window->setInputFeatures(WindowInfo::Feature::DROP_INPUT);
+ mDispatcher->setFocusedApplication(ADISPLAY_ID_DEFAULT, application);
+ window->setFocusable(true);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {window}}});
+ setFocusedWindow(window);
+ window->consumeFocusEvent(true /*hasFocus*/, true /*inTouchMode*/);
+
+ // With the flag set, window should not get any input
+ NotifyKeyArgs keyArgs = generateKeyArgs(AKEY_EVENT_ACTION_DOWN, ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyKey(&keyArgs);
+ window->assertNoEvents();
+
+ NotifyMotionArgs motionArgs =
+ generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+ ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyMotion(&motionArgs);
+ window->assertNoEvents();
+
+ // With the flag cleared, the window should get input
+ window->setInputFeatures({});
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {window}}});
+
+ keyArgs = generateKeyArgs(AKEY_EVENT_ACTION_UP, ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyKey(&keyArgs);
+ window->consumeKeyUp(ADISPLAY_ID_DEFAULT);
+
+ motionArgs = generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+ ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyMotion(&motionArgs);
+ window->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+ window->assertNoEvents();
+}
+
+TEST_F(InputDispatcherDropInputFeatureTest, ObscuredWindowDropsInput) {
+ std::shared_ptr<FakeApplicationHandle> obscuringApplication =
+ std::make_shared<FakeApplicationHandle>();
+ sp<FakeWindowHandle> obscuringWindow =
+ new FakeWindowHandle(obscuringApplication, mDispatcher, "obscuringWindow",
+ ADISPLAY_ID_DEFAULT);
+ obscuringWindow->setFrame(Rect(0, 0, 50, 50));
+ obscuringWindow->setOwnerInfo(111, 111);
+ obscuringWindow->setFlags(WindowInfo::Flag::NOT_TOUCHABLE);
+ std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
+ sp<FakeWindowHandle> window =
+ new FakeWindowHandle(application, mDispatcher, "Test window", ADISPLAY_ID_DEFAULT);
+ window->setInputFeatures(WindowInfo::Feature::DROP_INPUT_IF_OBSCURED);
+ window->setOwnerInfo(222, 222);
+ mDispatcher->setFocusedApplication(ADISPLAY_ID_DEFAULT, application);
+ window->setFocusable(true);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {obscuringWindow, window}}});
+ setFocusedWindow(window);
+ window->consumeFocusEvent(true /*hasFocus*/, true /*inTouchMode*/);
+
+ // With the flag set, window should not get any input
+ NotifyKeyArgs keyArgs = generateKeyArgs(AKEY_EVENT_ACTION_DOWN, ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyKey(&keyArgs);
+ window->assertNoEvents();
+
+ NotifyMotionArgs motionArgs =
+ generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+ ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyMotion(&motionArgs);
+ window->assertNoEvents();
+
+ // With the flag cleared, the window should get input
+ window->setInputFeatures({});
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {obscuringWindow, window}}});
+
+ keyArgs = generateKeyArgs(AKEY_EVENT_ACTION_UP, ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyKey(&keyArgs);
+ window->consumeKeyUp(ADISPLAY_ID_DEFAULT);
+
+ motionArgs = generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+ ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyMotion(&motionArgs);
+ window->consumeMotionDown(ADISPLAY_ID_DEFAULT, AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED);
+ window->assertNoEvents();
+}
+
+TEST_F(InputDispatcherDropInputFeatureTest, UnobscuredWindowGetsInput) {
+ std::shared_ptr<FakeApplicationHandle> obscuringApplication =
+ std::make_shared<FakeApplicationHandle>();
+ sp<FakeWindowHandle> obscuringWindow =
+ new FakeWindowHandle(obscuringApplication, mDispatcher, "obscuringWindow",
+ ADISPLAY_ID_DEFAULT);
+ obscuringWindow->setFrame(Rect(0, 0, 50, 50));
+ obscuringWindow->setOwnerInfo(111, 111);
+ obscuringWindow->setFlags(WindowInfo::Flag::NOT_TOUCHABLE);
+ std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
+ sp<FakeWindowHandle> window =
+ new FakeWindowHandle(application, mDispatcher, "Test window", ADISPLAY_ID_DEFAULT);
+ window->setInputFeatures(WindowInfo::Feature::DROP_INPUT_IF_OBSCURED);
+ window->setOwnerInfo(222, 222);
+ mDispatcher->setFocusedApplication(ADISPLAY_ID_DEFAULT, application);
+ window->setFocusable(true);
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {obscuringWindow, window}}});
+ setFocusedWindow(window);
+ window->consumeFocusEvent(true /*hasFocus*/, true /*inTouchMode*/);
+
+ // With the flag set, window should not get any input
+ NotifyKeyArgs keyArgs = generateKeyArgs(AKEY_EVENT_ACTION_DOWN, ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyKey(&keyArgs);
+ window->assertNoEvents();
+
+ NotifyMotionArgs motionArgs =
+ generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+ ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyMotion(&motionArgs);
+ window->assertNoEvents();
+
+ // When the window is no longer obscured because it went on top, it should get input
+ mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {window, obscuringWindow}}});
+
+ keyArgs = generateKeyArgs(AKEY_EVENT_ACTION_UP, ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyKey(&keyArgs);
+ window->consumeKeyUp(ADISPLAY_ID_DEFAULT);
+
+ motionArgs = generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
+ ADISPLAY_ID_DEFAULT);
+ mDispatcher->notifyMotion(&motionArgs);
+ window->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+ window->assertNoEvents();
+}
+
} // namespace android::inputdispatcher