Changed: Add general compatibility fixes for minSdkVerion 21

terminal-view/src/main/java/com/termux/view/TerminalView.java

@@ -1245,6 +1245,7 @@ public final class TerminalView extends View {
      * Define functions required for long hold toolbar.
      */
     private final Runnable mShowFloatingToolbar = new Runnable() {
+        @RequiresApi(api = Build.VERSION_CODES.M)
         @Override
         public void run() {
             if (getTextSelectionActionMode() != null) {
@@ -1253,6 +1254,7 @@ public final class TerminalView extends View {
         }
     };
 
+    @RequiresApi(api = Build.VERSION_CODES.M)
     private void showFloatingToolbar() {
         if (getTextSelectionActionMode() != null) {
             int delay = ViewConfiguration.getDoubleTapTimeout();
@@ -1260,6 +1262,7 @@ public final class TerminalView extends View {
         }
     }
 
+    @RequiresApi(api = Build.VERSION_CODES.M)
     void hideFloatingToolbar() {
         if (getTextSelectionActionMode() != null) {
             removeCallbacks(mShowFloatingToolbar);
@@ -1268,7 +1271,7 @@ public final class TerminalView extends View {
     }
 
     public void updateFloatingToolbarVisibility(MotionEvent event) {
-        if (getTextSelectionActionMode() != null) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && getTextSelectionActionMode() != null) {
             switch (event.getActionMasked()) {
                 case MotionEvent.ACTION_MOVE:
                     hideFloatingToolbar();

terminal-view/src/main/java/com/termux/view/support/PopupWindowCompatGingerbread.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+package com.termux.view.support;
+
+import android.util.Log;
+import android.widget.PopupWindow;
+
+import java.lang.reflect.Method;
+
+/**
+ * Implementation of PopupWindow compatibility that can call Gingerbread APIs.
+ * https://chromium.googlesource.com/android_tools/+/HEAD/sdk/extras/android/support/v4/src/gingerbread/android/support/v4/widget/PopupWindowCompatGingerbread.java
+ */
+public class PopupWindowCompatGingerbread {
+
+    private static Method sSetWindowLayoutTypeMethod;
+    private static boolean sSetWindowLayoutTypeMethodAttempted;
+    private static Method sGetWindowLayoutTypeMethod;
+    private static boolean sGetWindowLayoutTypeMethodAttempted;
+
+    public static void setWindowLayoutType(PopupWindow popupWindow, int layoutType) {
+        if (!sSetWindowLayoutTypeMethodAttempted) {
+            try {
+                sSetWindowLayoutTypeMethod = PopupWindow.class.getDeclaredMethod(
+                    "setWindowLayoutType", int.class);
+                sSetWindowLayoutTypeMethod.setAccessible(true);
+            } catch (Exception e) {
+                // Reflection method fetch failed. Oh well.
+            }
+            sSetWindowLayoutTypeMethodAttempted = true;
+        }
+        if (sSetWindowLayoutTypeMethod != null) {
+            try {
+                sSetWindowLayoutTypeMethod.invoke(popupWindow, layoutType);
+            } catch (Exception e) {
+                // Reflection call failed. Oh well.
+            }
+        }
+    }
+
+    public static int getWindowLayoutType(PopupWindow popupWindow) {
+        if (!sGetWindowLayoutTypeMethodAttempted) {
+            try {
+                sGetWindowLayoutTypeMethod = PopupWindow.class.getDeclaredMethod(
+                    "getWindowLayoutType");
+                sGetWindowLayoutTypeMethod.setAccessible(true);
+            } catch (Exception e) {
+                // Reflection method fetch failed. Oh well.
+            }
+            sGetWindowLayoutTypeMethodAttempted = true;
+        }
+        if (sGetWindowLayoutTypeMethod != null) {
+            try {
+                return (Integer) sGetWindowLayoutTypeMethod.invoke(popupWindow);
+            } catch (Exception e) {
+                // Reflection call failed. Oh well.
+            }
+        }
+        return 0;
+    }
+
+}

terminal-view/src/main/java/com/termux/view/textselection/TextSelectionCursorController.java

@@ -3,6 +3,7 @@ package com.termux.view.textselection;
 import android.content.ClipboardManager;
 import android.content.Context;
 import android.graphics.Rect;
+import android.os.Build;
 import android.text.TextUtils;
 import android.view.ActionMode;
 import android.view.Menu;
@@ -153,6 +154,12 @@ public class TextSelectionCursorController implements CursorController {
 
         };
 
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+            mActionMode = terminalView.startActionMode(callback);
+            return;
+        }
+
+        //noinspection NewApi
         mActionMode = terminalView.startActionMode(new ActionMode.Callback2() {
             @Override
             public boolean onCreateActionMode(ActionMode mode, Menu menu) {

terminal-view/src/main/java/com/termux/view/textselection/TextSelectionHandleView.java

@@ -4,6 +4,7 @@ import android.annotation.SuppressLint;
 import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.os.SystemClock;
 import android.view.MotionEvent;
 import android.view.View;
@@ -14,6 +15,7 @@ import android.widget.PopupWindow;
 
 import com.termux.view.R;
 import com.termux.view.TerminalView;
+import com.termux.view.support.PopupWindowCompatGingerbread;
 
 @SuppressLint("ViewConstructor")
 public class TextSelectionHandleView extends View {
@@ -68,13 +70,18 @@ public class TextSelectionHandleView extends View {
             android.R.attr.textSelectHandleWindowStyle);
         mHandle.setSplitTouchEnabled(true);
         mHandle.setClippingEnabled(false);
-        mHandle.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
         mHandle.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
         mHandle.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
         mHandle.setBackgroundDrawable(null);
         mHandle.setAnimationStyle(0);
-        mHandle.setEnterTransition(null);
-        mHandle.setExitTransition(null);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            mHandle.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
+            mHandle.setEnterTransition(null);
+            mHandle.setExitTransition(null);
+        } else {
+            PopupWindowCompatGingerbread.setWindowLayoutType(mHandle, WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
+        }
         mHandle.setContentView(this);
     }