Fix stale EditorInfo upon EditText#setText()

This is a follow up to our previous CL [1], which added initial
surrounding text support into EditorInfo and let TextView support it.

What we overlooked was that calling TextView#setText() would trigger

  TextView#onCreateInputConnection()

before TextView#mText is updated to the new value.  As a result,
EditorInfo is initialized with a stale surrounding text information.

With this CL, EditorInfo will correctly be initialized with the new
text specified to TextView#setText().

One complicated thing in this CL is InputMethodManager also has some
issues about how to drop spurious

  InputMethodService#onUpdateSelection()

while InputConnection is being replaced with a new instance.  I ended
up having to introduce a hacky boolean

  Editor#mHasPendingRestartInputForSetText

to work around this in the TextView/EditText. This workaround is
expected to be removed/revisited as part of Bug 186582769.

 [1]: Ie04f2349b1157408aa8ed9044aea12ce99132cb4
      c486acc4d29a0e441ddcd05b3fc0c919aee7fbd0

Fix: 161330778
Test: atest CtsInputMethodTestCases:EditTextImeSupportTest
Change-Id: Iee3b754eea319861b2eb955d6cc95ba13006b55e

1 files changed, 7 insertions, 4 deletions

diff --git a/core/java/android/widget/TextView.java b/core/java/android/widget/TextView.java
index 07a9a5fad6e2..1a37b595287d 100644
--- a/core/java/android/widget/TextView.java
+++ b/core/java/android/widget/TextView.java
@@ -6285,11 +6285,10 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
                 || needEditableForNotification) {
             createEditorIfNeeded();
             mEditor.forgetUndoRedo();
+            mEditor.scheduleRestartInputForSetText();
             Editable t = mEditableFactory.newEditable(text);
             text = t;
             setFilters(t, mFilters);
-            InputMethodManager imm = getInputMethodManager();
-            if (imm != null) imm.restartInput(this);
         } else if (precomputed != null) {
             if (mTextDir == null) {
                 mTextDir = getTextDirectionHeuristic();
@@ -6408,8 +6407,12 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
             notifyListeningManagersAfterTextChanged();
         }
 
-        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
-        if (mEditor != null) mEditor.prepareCursorControllers();
+        if (mEditor != null) {
+            // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
+            mEditor.prepareCursorControllers();
+
+            mEditor.maybeFireScheduledRestartInputForSetText();
+        }
     }
 
     /**