[Android] Adding Smart GO/NEXT feature in Chrome

content/public/android/java/src/org/chromium/content/browser/input/ImeUtils.java

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content.browser.input;
 
 import android.text.Editable;
 import android.text.InputType;
 import android.text.Selection;
 import android.util.StringBuilderPrinter;
@@ skipping 31 matching lines @@
                 EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT;
 
         if ((inputFlags & WebTextInputFlags.AutocompleteOff) != 0) {
             outAttrs.inputType |= EditorInfo.TYPE_TEXT_FLAG_NO_SUGGESTIONS;
         }
 
         int imeAction = 0;
         if (inputMode == WebTextInputMode.kDefault) {
             if (inputType == TextInputType.TEXT) {
                 // Normal text field
-                imeAction = EditorInfo.IME_ACTION_GO;
                 if ((inputFlags & WebTextInputFlags.AutocorrectOff) == 0) {
                     outAttrs.inputType |= EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT;
                 }
             } else if (inputType == TextInputType.TEXT_AREA
                     || inputType == TextInputType.CONTENT_EDITABLE) {
                 outAttrs.inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
                 if ((inputFlags & WebTextInputFlags.AutocorrectOff) == 0) {
                     outAttrs.inputType |= EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT;
                 }
-                imeAction = EditorInfo.IME_ACTION_NONE;
             } else if (inputType == TextInputType.PASSWORD) {
                 outAttrs.inputType =
                         InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_WEB_PASSWORD;
-                imeAction = EditorInfo.IME_ACTION_GO;
             } else if (inputType == TextInputType.SEARCH) {
                 imeAction = EditorInfo.IME_ACTION_SEARCH;
             } else if (inputType == TextInputType.URL) {
                 outAttrs.inputType = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_URI;
-                imeAction = EditorInfo.IME_ACTION_GO;
             } else if (inputType == TextInputType.EMAIL) {
                 // Email
                 outAttrs.inputType =
                         InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS;
-                imeAction = EditorInfo.IME_ACTION_GO;
             } else if (inputType == TextInputType.TELEPHONE) {
                 // Telephone
                 // Number and telephone do not have both a Tab key and an
                 // action in default OSK, so set the action to NEXT
                 outAttrs.inputType = InputType.TYPE_CLASS_PHONE;
-                imeAction = EditorInfo.IME_ACTION_NEXT;
             } else if (inputType == TextInputType.NUMBER) {
                 // Number
                 outAttrs.inputType = InputType.TYPE_CLASS_NUMBER
                         | InputType.TYPE_NUMBER_VARIATION_NORMAL
                         | InputType.TYPE_NUMBER_FLAG_DECIMAL;
-                imeAction = EditorInfo.IME_ACTION_NEXT;
             }
         } else {
             switch (inputMode) {
                 default:
                 case WebTextInputMode.kDefault:
                 case WebTextInputMode.kVerbatim:
                 case WebTextInputMode.kLatin:
                 case WebTextInputMode.kLatinName:
                 case WebTextInputMode.kLatinProse:
                 case WebTextInputMode.kFullWidthLatin:
@@ skipping 22 matching lines @@
                     break;
                 case WebTextInputMode.kUrl:
                     outAttrs.inputType =
                             InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_URI;
                     imeAction = EditorInfo.IME_ACTION_NEXT;
                     break;
             }
         }
 
         outAttrs.imeOptions |= imeAction;
+
+        boolean enterKeyAction = false;
+        // For multiline text or any text input with key event listeners, Enter key is needed.
+        if (((outAttrs.inputType & EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)
+                    == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)
+                || (inputFlags & WebTextInputFlags.ListeningToKeyboardEvents) != 0) {
+            // TODO(ajith.v) Find an option to remove Enter Key from IME (assume by default
+            // ENTER key is shown)
+            // TODO(ajith.v) For text area with implicit form submission how do we handle,
+            // we need to show both GO and ENTER key at same time.
+            outAttrs.imeOptions |= EditorInfo.IME_ACTION_GO;
+            enterKeyAction = true;
+        }
+
+        boolean nextKeyAction = false;
+        // If ENTER key is already applied, then don't apply NEXT as it can result display issues in
+        // IME
+        if (!enterKeyAction && (inputFlags & WebTextInputFlags.HaveNextFocusableElement) != 0) {
+            outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
+            nextKeyAction = true;
+        }
+        // If ENTER/NEXT key is already applied, then don't apply PREVIOUS as it can result display
+        // issues in IME
+        if (!enterKeyAction && !nextKeyAction
+                && (inputFlags & WebTextInputFlags.HavePreviousFocusableElement) != 0) {
+            outAttrs.imeOptions |= EditorInfo.IME_ACTION_PREVIOUS;
+        }
+
         // Handling of autocapitalize. Blink will send the flag taking into account the element's
         // type. This is not using AutocapitalizeNone because Android does not autocapitalize by
         // default and there is no way to express no capitalization.
         // Autocapitalize is meant as a hint to the virtual keyboard.
         if ((inputFlags & WebTextInputFlags.AutocapitalizeCharacters) != 0) {
             outAttrs.inputType |= InputType.TYPE_TEXT_FLAG_CAP_CHARACTERS;
         } else if ((inputFlags & WebTextInputFlags.AutocapitalizeWords) != 0) {
             outAttrs.inputType |= InputType.TYPE_TEXT_FLAG_CAP_WORDS;
         } else if ((inputFlags & WebTextInputFlags.AutocapitalizeSentences) != 0) {
             outAttrs.inputType |= InputType.TYPE_TEXT_FLAG_CAP_SENTENCES;
@@ skipping 56 matching lines @@
         if (!condition) throw new AssertionError(msg);
     }
 
     /**
      * Check that the current thread is UI thread, and raise an error if it is not.
      */
     static void checkOnUiThread() {
         checkCondition("Should be on UI thread.", ThreadUtils.runningOnUiThread());
     }
 }