No accidental confirmation

src/activities/util/ConfirmationActivity.cpp

@@ -11,6 +11,7 @@ ConfirmationActivity::ConfirmationActivity(GfxRenderer& renderer, MappedInputMan
 
 void ConfirmationActivity::onEnter() {
   Activity::onEnter();
+  inputArmed = false;
 
   lineHeight = renderer.getLineHeight(fontId);
   const int maxWidth = renderer.getScreenWidth() - (margin * 2);
@@ -56,6 +57,19 @@ void ConfirmationActivity::render(RenderLock&& lock) {
 }
 
 void ConfirmationActivity::loop() {
+  if (!inputArmed) {
+    const bool anyFrontPressed = mappedInput.isPressed(MappedInputManager::Button::Back) ||
+                                 mappedInput.isPressed(MappedInputManager::Button::Confirm) ||
+                                 mappedInput.isPressed(MappedInputManager::Button::Left) ||
+                                 mappedInput.isPressed(MappedInputManager::Button::Right);
+
+    // Ignore inherited press/release events from the parent activity.
+    if (!anyFrontPressed && !mappedInput.wasAnyPressed() && !mappedInput.wasAnyReleased()) {
+      inputArmed = true;
+    }
+    return;
+  }
+
   if (mappedInput.wasReleased(MappedInputManager::Button::Right)) {
     ActivityResult res;
     res.isCancelled = false;

src/activities/util/ConfirmationActivity.h

@@ -19,6 +19,7 @@ class ConfirmationActivity : public Activity {
   std::string safeBody;
   int startY = 0;
   int lineHeight = 0;
+  bool inputArmed = false;
 
  public:
   ConfirmationActivity(GfxRenderer& renderer, MappedInputManager& mappedInput, const std::string& heading,