Set the text bgcolor only when CursorAnchorInfo is available

When CursorAnchorInfo is unavailable, we shouldn't try to show
the commit indicator and set the text highlight color.

With this CL, RichInputConnection can be used to track if the
application responded that it does support CursorAnchorInfo or
not.  This result will be taken into consideration when
InputLogic needs to determine whether the commit indicator
should be displayed or not.

Change-Id: I945d70eeb02a7a5f3d9b22459b23d7028508910f

1 files changed, 31 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/RichInputConnection.java b/java/src/com/android/inputmethod/latin/RichInputConnection.java
index 035557610..497823aeb 100644
--- a/java/src/com/android/inputmethod/latin/RichInputConnection.java
+++ b/java/src/com/android/inputmethod/latin/RichInputConnection.java
@@ -30,7 +30,9 @@ import android.view.inputmethod.CorrectionInfo;
 import android.view.inputmethod.ExtractedText;
 import android.view.inputmethod.ExtractedTextRequest;
 import android.view.inputmethod.InputConnection;
+import android.view.inputmethod.InputMethodManager;
 
+import com.android.inputmethod.compat.InputConnectionCompatUtils;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
 import com.android.inputmethod.latin.utils.CapsModeUtils;
 import com.android.inputmethod.latin.utils.DebugLogUtils;
@@ -906,4 +908,33 @@ public final class RichInputConnection {
             mIC.setSelection(mExpectedSelStart, mExpectedSelEnd);
         }
     }
+
+    private boolean mCursorAnchorInfoMonitorEnabled = false;
+
+    /**
+     * Requests the editor to call back {@link InputMethodManager#updateCursorAnchorInfo}.
+     * @param enableMonitor {@code true} to request the editor to call back the method whenever the
+     * cursor/anchor position is changed.
+     * @param requestImmediateCallback {@code true} to request the editor to call back the method
+     * as soon as possible to notify the current cursor/anchor position to the input method.
+     * @return {@code true} if the request is accepted. Returns {@code false} otherwise, which
+     * includes "not implemented" or "rejected" or "temporarily unavailable" or whatever which
+     * prevents the application from fulfilling the request. (TODO: Improve the API when it turns
+     * out that we actually need more detailed error codes)
+     */
+    public boolean requestUpdateCursorAnchorInfo(final boolean enableMonitor,
+            final boolean requestImmediateCallback) {
+        final boolean scheduled = InputConnectionCompatUtils.requestUpdateCursorAnchorInfo(mIC,
+                enableMonitor, requestImmediateCallback);
+        mCursorAnchorInfoMonitorEnabled = (scheduled && enableMonitor);
+        return scheduled;
+    }
+
+    /**
+     * @return {@code true} if the application reported that the monitor mode of
+     * {@link InputMethodService#onUpdateCursorAnchorInfo(CursorAnchorInfo)} is currently enabled.
+     */
+    public boolean isCursorAnchorInfoMonitorEnabled() {
+        return mCursorAnchorInfoMonitorEnabled;
+    }
 }