Add a private IME option to suppress the gesture floating preview text.

If the option defined by Constants.NO_FLOATING_GESTURE_PREVIEW is set
for a text field via EditorInfo.privateImeOptions, the floating gesture
preview will be suppressed regardless of the settings preference.

Feature request:
bug: 17325039

Change-Id: I1a1df194369e8f2d76abd9d84939a057f55f4a1c

java/src/com/android/inputmethod/latin/Constants.java

@@ -57,6 +57,13 @@ public final class Constants {
         @SuppressWarnings("dep-ann")
         public static final String FORCE_ASCII = "forceAscii";
 
+        /**
+         * The private IME option used to suppress the floating gesture preview for a given text
+         * field. This overrides the corresponding keyboard settings preference.
+         * {@link com.android.inputmethod.latin.settings.SettingsValues#mGestureFloatingPreviewTextEnabled}
+         */
+        public static final String NO_FLOATING_GESTURE_PREVIEW = "noGestureFloatingPreview";
+
         private ImeOption() {
             // This utility class is not publicly instantiable.
         }

java/src/com/android/inputmethod/latin/InputAttributes.java

@@ -16,6 +16,7 @@
 
 package com.android.inputmethod.latin;
 
+import static com.android.inputmethod.latin.Constants.ImeOption.NO_FLOATING_GESTURE_PREVIEW;
 import static com.android.inputmethod.latin.Constants.ImeOption.NO_MICROPHONE;
 import static com.android.inputmethod.latin.Constants.ImeOption.NO_MICROPHONE_COMPAT;
 
@@ -42,6 +43,12 @@ public final class InputAttributes {
     final public boolean mApplicationSpecifiedCompletionOn;
     final public boolean mShouldInsertSpacesAutomatically;
     final public boolean mShouldShowVoiceInputKey;
+    /**
+     * Whether the floating gesture preview should be disabled. If true, this should override the
+     * corresponding keyboard settings preference, always suppressing the floating preview text.
+     * {@link com.android.inputmethod.latin.settings.SettingsValues#mGestureFloatingPreviewTextEnabled}
+     */
+    final public boolean mDisableGestureFloatingPreviewText;
     final private int mInputType;
     final private EditorInfo mEditorInfo;
     final private String mPackageNameForPrivateImeOptions;
@@ -76,6 +83,7 @@ public final class InputAttributes {
             mApplicationSpecifiedCompletionOn = false;
             mShouldInsertSpacesAutomatically = false;
             mShouldShowVoiceInputKey = false;
+            mDisableGestureFloatingPreviewText = false;
             return;
         }
         // inputClass == InputType.TYPE_CLASS_TEXT
@@ -107,6 +115,9 @@ public final class InputAttributes {
                 || hasNoMicrophoneKeyOption();
         mShouldShowVoiceInputKey = !noMicrophone;
 
+        mDisableGestureFloatingPreviewText = InputAttributes.inPrivateImeOptions(
+                mPackageNameForPrivateImeOptions, NO_FLOATING_GESTURE_PREVIEW, editorInfo);
+
         // If it's a browser edit field and auto correct is not ON explicitly, then
         // disable auto correction, but keep suggestions on.
         // If NO_SUGGESTIONS is set, don't do prediction.

java/src/com/android/inputmethod/latin/settings/SettingsValues.java

@@ -162,8 +162,8 @@ public class SettingsValues {
                 autoCorrectionThresholdRawValue);
         mGestureInputEnabled = Settings.readGestureInputEnabled(prefs, res);
         mGestureTrailEnabled = prefs.getBoolean(Settings.PREF_GESTURE_PREVIEW_TRAIL, true);
-        mGestureFloatingPreviewTextEnabled = prefs.getBoolean(
+        mGestureFloatingPreviewTextEnabled = !mInputAttributes.mDisableGestureFloatingPreviewText
-                Settings.PREF_GESTURE_FLOATING_PREVIEW_TEXT, true);
+                && prefs.getBoolean(Settings.PREF_GESTURE_FLOATING_PREVIEW_TEXT, true);
         mPhraseGestureEnabled = Settings.readPhraseGestureEnabled(prefs, res);
         mAutoCorrectionEnabledPerUserSettings = mAutoCorrectEnabled
                 && !mInputAttributes.mInputTypeNoAutoCorrect;