From 559bc5b0d03f890efcca01d6d3afec61efdd7e1d Mon Sep 17 00:00:00 2001
From: Seiko <seiko_des@outlook.com>
Date: Thu, 19 Aug 2021 10:10:29 +0800
Subject: [PATCH] clear fragmentManager backStack in pushTo()

see: https://github.com/vitaviva/fragivity/issues/47
---
 .../github/fragivity/example/HomeFragment.kt  | 20 +++++++++----------
 .../app/FragivityFragmentNavigator.kt         |  7 ++++++-
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/app/src/main/java/com/github/fragivity/example/HomeFragment.kt b/app/src/main/java/com/github/fragivity/example/HomeFragment.kt
index ff9547c..ab514e4 100644
--- a/app/src/main/java/com/github/fragivity/example/HomeFragment.kt
+++ b/app/src/main/java/com/github/fragivity/example/HomeFragment.kt
@@ -33,16 +33,16 @@ class HomeFragment : AbsBaseFragment(false) {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        requireActivity().onBackPressedDispatcher
-            .addCallback(this) {
-                val current = System.currentTimeMillis()
-                if (current - lastClickTime > 2000) {
-                    showToast("再按一次退出")
-                    lastClickTime = current
-                } else {
-                    finish()
-                }
-            }
+//        requireActivity().onBackPressedDispatcher
+//            .addCallback(this) {
+//                val current = System.currentTimeMillis()
+//                if (current - lastClickTime > 2000) {
+//                    showToast("再按一次退出")
+//                    lastClickTime = current
+//                } else {
+//                    finish()
+//                }
+//            }
     }
 
     override fun onCreateView(
diff --git a/library/src/main/kotlin/androidx/fragment/app/FragivityFragmentNavigator.kt b/library/src/main/kotlin/androidx/fragment/app/FragivityFragmentNavigator.kt
index 2d37ab6..e89ff72 100644
--- a/library/src/main/kotlin/androidx/fragment/app/FragivityFragmentNavigator.kt
+++ b/library/src/main/kotlin/androidx/fragment/app/FragivityFragmentNavigator.kt
@@ -117,7 +117,7 @@ class FragivityFragmentNavigator(
         }
 
         val destId = destination.id
-        val initialNavigation = backStack.isEmpty()
+        val initialNavigation = backStack.isEmpty() || isPushTo
 
         val fragment = createFragment(destination, args)
         ft.add(containerId, fragment, generateBackStackName(backStack.size, destId))
@@ -173,6 +173,11 @@ class FragivityFragmentNavigator(
         ft.setReorderingAllowed(true)
         ft.commit()
 
+        if (isPushTo) {
+            // pushTo情况下清空返回栈
+            fragmentManager.mBackStack?.clear()
+        }
+
         if (isPopSelf) {
             backStack.removeLast()
             backStack.add(destId)