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-rw-r--r--include/input/Input.h13
-rw-r--r--services/inputflinger/InputDispatcher.cpp29
-rw-r--r--services/inputflinger/InputDispatcher.h9
-rw-r--r--services/inputflinger/InputWindow.cpp11
-rw-r--r--services/inputflinger/InputWindow.h2
5 files changed, 61 insertions, 3 deletions
diff --git a/include/input/Input.h b/include/input/Input.h
index 617175b..82fc659 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -45,6 +45,19 @@ enum {
};
enum {
+
+ /**
+ * This flag indicates that the window that received this motion event is partly
+ * or wholly obscured by another visible window above it. This flag is set to true
+ * even if the event did not directly pass through the obscured area.
+ * A security sensitive application can check this flag to identify situations in which
+ * a malicious application may have covered up part of its content for the purpose
+ * of misleading the user or hijacking touches. An appropriate response might be
+ * to drop the suspect touches or to take additional precautions to confirm the user's
+ * actual intent.
+ */
+ AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED = 0x2,
+
/* Motion event is inconsistent with previously sent motion events. */
AMOTION_EVENT_FLAG_TAINTED = 0x80000000,
};
diff --git a/services/inputflinger/InputDispatcher.cpp b/services/inputflinger/InputDispatcher.cpp
index 0fba1bf..c9e876f 100644
--- a/services/inputflinger/InputDispatcher.cpp
+++ b/services/inputflinger/InputDispatcher.cpp
@@ -1225,6 +1225,8 @@ int32_t InputDispatcher::findTouchedWindowTargetsLocked(nsecs_t currentTime,
int32_t outsideTargetFlags = InputTarget::FLAG_DISPATCH_AS_OUTSIDE;
if (isWindowObscuredAtPointLocked(windowHandle, x, y)) {
outsideTargetFlags |= InputTarget::FLAG_WINDOW_IS_OBSCURED;
+ } else if (isWindowObscuredLocked(windowHandle)) {
+ outsideTargetFlags |= InputTarget::FLAG_WINDOW_IS_PARTIALLY_OBSCURED;
}
mTempTouchState.addOrUpdateWindow(
@@ -1262,6 +1264,8 @@ int32_t InputDispatcher::findTouchedWindowTargetsLocked(nsecs_t currentTime,
}
if (isWindowObscuredAtPointLocked(newTouchedWindowHandle, x, y)) {
targetFlags |= InputTarget::FLAG_WINDOW_IS_OBSCURED;
+ } else if (isWindowObscuredLocked(newTouchedWindowHandle)) {
+ targetFlags |= InputTarget::FLAG_WINDOW_IS_PARTIALLY_OBSCURED;
}
// Update hover state.
@@ -1437,6 +1441,7 @@ int32_t InputDispatcher::findTouchedWindowTargetsLocked(nsecs_t currentTime,
== InputWindowInfo::TYPE_WALLPAPER) {
mTempTouchState.addOrUpdateWindow(windowHandle,
InputTarget::FLAG_WINDOW_IS_OBSCURED
+ | InputTarget::FLAG_WINDOW_IS_PARTIALLY_OBSCURED
| InputTarget::FLAG_DISPATCH_AS_IS,
BitSet32(0));
}
@@ -1631,6 +1636,27 @@ bool InputDispatcher::isWindowObscuredAtPointLocked(
return false;
}
+
+bool InputDispatcher::isWindowObscuredLocked(const sp<InputWindowHandle>& windowHandle) const {
+ int32_t displayId = windowHandle->getInfo()->displayId;
+ const InputWindowInfo* windowInfo = windowHandle->getInfo();
+ size_t numWindows = mWindowHandles.size();
+ for (size_t i = 0; i < numWindows; i++) {
+ sp<InputWindowHandle> otherHandle = mWindowHandles.itemAt(i);
+ if (otherHandle == windowHandle) {
+ break;
+ }
+
+ const InputWindowInfo* otherInfo = otherHandle->getInfo();
+ if (otherInfo->displayId == displayId
+ && otherInfo->visible && !otherInfo->isTrustedOverlay()
+ && otherInfo->overlaps(windowInfo)) {
+ return true;
+ }
+ }
+ return false;
+}
+
String8 InputDispatcher::checkWindowReadyForMoreInputLocked(nsecs_t currentTime,
const sp<InputWindowHandle>& windowHandle, const EventEntry* eventEntry,
const char* targetType) {
@@ -1905,6 +1931,9 @@ void InputDispatcher::enqueueDispatchEntryLocked(
if (dispatchEntry->targetFlags & InputTarget::FLAG_WINDOW_IS_OBSCURED) {
dispatchEntry->resolvedFlags |= AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED;
}
+ if (dispatchEntry->targetFlags & InputTarget::FLAG_WINDOW_IS_PARTIALLY_OBSCURED) {
+ dispatchEntry->resolvedFlags |= AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED;
+ }
if (!connection->inputState.trackMotion(motionEntry,
dispatchEntry->resolvedAction, dispatchEntry->resolvedFlags)) {
diff --git a/services/inputflinger/InputDispatcher.h b/services/inputflinger/InputDispatcher.h
index 98355c6..1c054f5 100644
--- a/services/inputflinger/InputDispatcher.h
+++ b/services/inputflinger/InputDispatcher.h
@@ -89,7 +89,7 @@ struct InputTarget {
/* This flag indicates that the event is being delivered to a foreground application. */
FLAG_FOREGROUND = 1 << 0,
- /* This flag indicates that the target of a MotionEvent is partly or wholly
+ /* This flag indicates that the MotionEvent falls within the area of the target
* obscured by another visible window above it. The motion event should be
* delivered with flag AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED. */
FLAG_WINDOW_IS_OBSCURED = 1 << 1,
@@ -139,6 +139,12 @@ struct InputTarget {
| FLAG_DISPATCH_AS_HOVER_EXIT
| FLAG_DISPATCH_AS_SLIPPERY_EXIT
| FLAG_DISPATCH_AS_SLIPPERY_ENTER,
+
+ /* This flag indicates that the target of a MotionEvent is partly or wholly
+ * obscured by another visible window above it. The motion event should be
+ * delivered with flag AMOTION_EVENT_FLAG_WINDOW_IS_PARTIALLY_OBSCURED. */
+ FLAG_WINDOW_IS_PARTIALLY_OBSCURED = 1 << 14,
+
};
// The input channel to be targeted.
@@ -1048,6 +1054,7 @@ private:
const InjectionState* injectionState);
bool isWindowObscuredAtPointLocked(const sp<InputWindowHandle>& windowHandle,
int32_t x, int32_t y) const;
+ bool isWindowObscuredLocked(const sp<InputWindowHandle>& windowHandle) const;
String8 getApplicationWindowLabelLocked(const sp<InputApplicationHandle>& applicationHandle,
const sp<InputWindowHandle>& windowHandle);
diff --git a/services/inputflinger/InputWindow.cpp b/services/inputflinger/InputWindow.cpp
index fda3ffa..1b913c5 100644
--- a/services/inputflinger/InputWindow.cpp
+++ b/services/inputflinger/InputWindow.cpp
@@ -36,14 +36,16 @@ bool InputWindowInfo::touchableRegionContainsPoint(int32_t x, int32_t y) const {
}
bool InputWindowInfo::frameContainsPoint(int32_t x, int32_t y) const {
- return x >= frameLeft && x <= frameRight
- && y >= frameTop && y <= frameBottom;
+ return x >= frameLeft && x < frameRight
+ && y >= frameTop && y < frameBottom;
}
bool InputWindowInfo::isTrustedOverlay() const {
return layoutParamsType == TYPE_INPUT_METHOD
|| layoutParamsType == TYPE_INPUT_METHOD_DIALOG
|| layoutParamsType == TYPE_MAGNIFICATION_OVERLAY
+ || layoutParamsType == TYPE_STATUS_BAR
+ || layoutParamsType == TYPE_NAVIGATION_BAR
|| layoutParamsType == TYPE_SECURE_SYSTEM_OVERLAY;
}
@@ -51,6 +53,11 @@ bool InputWindowInfo::supportsSplitTouch() const {
return layoutParamsFlags & FLAG_SPLIT_TOUCH;
}
+bool InputWindowInfo::overlaps(const InputWindowInfo* other) const {
+ return frameLeft < other->frameRight && frameRight > other->frameLeft
+ && frameTop < other->frameBottom && frameBottom > other->frameTop;
+}
+
// --- InputWindowHandle ---
diff --git a/services/inputflinger/InputWindow.h b/services/inputflinger/InputWindow.h
index 42457ce..0ac7fce 100644
--- a/services/inputflinger/InputWindow.h
+++ b/services/inputflinger/InputWindow.h
@@ -146,6 +146,8 @@ struct InputWindowInfo {
bool isTrustedOverlay() const;
bool supportsSplitTouch() const;
+
+ bool overlaps(const InputWindowInfo* other) const;
};
generated by cgit v1.1 at 2024-04-30 08:51:25 +0000