Label empty suggestions.

When talkback is enabled, empty strings will have a content description.

Bug 19479836.

Change-Id: I25679a2bdeff238a5330ba406d5bc7e6e2868ba1

java/res/values/strings-talkback-descriptions.xml

@@ -31,6 +31,9 @@
     <!-- Spoken description used during obscured (e.g. password) entry to let the user know that auto-correction will be performed when a key is pressed. -->
     <string name="spoken_auto_correct_obscured"><xliff:g id="KEY_NAME" example="Space">%1$s</xliff:g> performs auto-correction</string>
 
+    <!-- Spoken description of a suggestion when nothing is specified and the field is blank. -->
+    <string name="spoken_empty_suggestion">No suggestion</string>
+
     <!-- Spoken description for unknown keyboard keys. -->
     <string name="spoken_description_unknown">Unknown character</string>
     <!-- Spoken description for the "Shift" keyboard key when "Shift" is off. -->

java/src/com/android/inputmethod/latin/suggestions/SuggestionStripLayoutHelper.java

@@ -342,8 +342,11 @@ final class SuggestionStripLayoutHelper {
      * @param placerView the view where the debug info will be placed.
      * @return the start index of more suggestions.
      */
-    public int layoutAndReturnStartIndexOfMoreSuggestions(final SuggestedWords suggestedWords,
+    public int layoutAndReturnStartIndexOfMoreSuggestions(
-            final ViewGroup stripView, final ViewGroup placerView) {
+            final Context context,
+            final SuggestedWords suggestedWords,
+            final ViewGroup stripView,
+            final ViewGroup placerView) {
         if (suggestedWords.isPunctuationSuggestions()) {
             return layoutPunctuationsAndReturnStartIndexOfMoreSuggestions(
                     (PunctuationSuggestions)suggestedWords, stripView);
@@ -362,7 +365,7 @@ final class SuggestionStripLayoutHelper {
             // by consolidating all slots in the strip.
             final int countInStrip = 1;
             mMoreSuggestionsAvailable = (wordCountToShow > countInStrip);
-            layoutWord(mCenterPositionInStrip, stripWidth - mPadding);
+            layoutWord(context, mCenterPositionInStrip, stripWidth - mPadding);
             stripView.addView(centerWordView);
             setLayoutWeight(centerWordView, 1.0f, ViewGroup.LayoutParams.MATCH_PARENT);
             if (SuggestionStripView.DBG) {
@@ -385,7 +388,7 @@ final class SuggestionStripLayoutHelper {
             }
 
             final int width = getSuggestionWidth(positionInStrip, stripWidth);
-            final TextView wordView = layoutWord(positionInStrip, width);
+            final TextView wordView = layoutWord(context, positionInStrip, width);
             stripView.addView(wordView);
             setLayoutWeight(wordView, getSuggestionWeight(positionInStrip),
                     ViewGroup.LayoutParams.MATCH_PARENT);
@@ -414,7 +417,7 @@ final class SuggestionStripLayoutHelper {
      * @param width the maximum width for layout in pixels.
      * @return the {@link TextView} containing the suggested word appropriately formatted.
      */
-    private TextView layoutWord(final int positionInStrip, final int width) {
+    private TextView layoutWord(final Context context, final int positionInStrip, final int width) {
         final TextView wordView = mWordViews.get(positionInStrip);
         final CharSequence word = wordView.getText();
         if (positionInStrip == mCenterPositionInStrip && mMoreSuggestionsAvailable) {
@@ -428,7 +431,10 @@ final class SuggestionStripLayoutHelper {
         }
         // {@link StyleSpan} in a content description may cause an issue of TTS/TalkBack.
         // Use a simple {@link String} to avoid the issue.
-        wordView.setContentDescription(TextUtils.isEmpty(word) ? null : word.toString());
+        wordView.setContentDescription(
+                TextUtils.isEmpty(word)
+                    ? context.getResources().getString(R.string.spoken_empty_suggestion)
+                    : word.toString());
         final CharSequence text = getEllipsizedTextWithSettingScaleX(
                 word, width, wordView.getPaint());
         final float scaleX = wordView.getTextScaleX();

java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java

@@ -146,6 +146,7 @@ public final class SuggestionStripView extends RelativeLayout implements OnClick
 
         for (int pos = 0; pos < SuggestedWords.MAX_SUGGESTIONS; pos++) {
             final TextView word = new TextView(context, null, R.attr.suggestionWordStyle);
+            word.setContentDescription(getResources().getString(R.string.spoken_empty_suggestion));
             word.setOnClickListener(this);
             word.setOnLongClickListener(this);
             mWordViews.add(word);
@@ -200,7 +201,7 @@ public final class SuggestionStripView extends RelativeLayout implements OnClick
         mStripVisibilityGroup.setLayoutDirection(isRtlLanguage);
         mSuggestedWords = suggestedWords;
         mStartIndexOfMoreSuggestions = mLayoutHelper.layoutAndReturnStartIndexOfMoreSuggestions(
-                mSuggestedWords, mSuggestionsStrip, this);
+                getContext(), mSuggestedWords, mSuggestionsStrip, this);
         mStripVisibilityGroup.showSuggestionsStrip();
     }