Shows snackbar in translate infobar, after certain user actions.

chrome/android/java/src/org/chromium/chrome/browser/infobar/TranslateCompactInfoBar.java

 // Copyright 2017 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.chrome.browser.infobar;
 
 import android.support.design.widget.TabLayout;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.LinearLayout;
 
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.infobar.translate.TranslateMenu;
 import org.chromium.chrome.browser.infobar.translate.TranslateMenuHelper;
 import org.chromium.chrome.browser.infobar.translate.TranslateTabLayout;
+import org.chromium.chrome.browser.snackbar.Snackbar;
 import org.chromium.chrome.browser.widget.TintedImageButton;
 import org.chromium.ui.widget.Toast;
 
 /**
  * Java version of the compcat translate infobar
  */
 class TranslateCompactInfoBar extends InfoBar
         implements TabLayout.OnTabSelectedListener, TranslateMenuHelper.TranslateMenuListener {
     public static final int TRANSLATING_INFOBAR = 1;
 
@@ skipping 165 matching lines @@
                 return;
             case TranslateMenu.ID_OVERFLOW_NOT_THIS_LANGUAGE:
                 initMenuHelper(TranslateMenu.MENU_SOURCE_LANGUAGE);
                 mLanguageMenuHelper.show(TranslateMenu.MENU_SOURCE_LANGUAGE);
                 return;
             default:
                 assert false : "Unexpected overflow menu code";
         }
     }
 
-    private void showSnackbar(int snackbarType) {
-        // TODO(ramyasharma): Show snackbar.
-    }
-
     @Override
     public void onTargetMenuItemClicked(String code) {
         // Reset target code in both UI and native.
         if (mOptions.setTargetLanguage(code)) {
             nativeApplyStringTranslateOption(
                     mNativeTranslateInfoBarPtr, TranslateOption.TARGET_CODE, code);
             // Adjust UI.
             mTabLayout.replaceTabTitle(TARGET_TAB_INDEX, mOptions.getRepresentationFromCode(code));
             startTranslating(mTabLayout.getSelectedTabPosition());
         }
     }
 
     @Override
     public void onSourceMenuItemClicked(String code) {
         // Reset source code in both UI and native.
         if (mOptions.setSourceLanguage(code)) {
             nativeApplyStringTranslateOption(
                     mNativeTranslateInfoBarPtr, TranslateOption.SOURCE_CODE, code);
             // Adjust UI.
             mTabLayout.replaceTabTitle(SOURCE_TAB_INDEX, mOptions.getRepresentationFromCode(code));
             startTranslating(mTabLayout.getSelectedTabPosition());
         }
     }
 
+    private void showSnackbar(int snackbarType) {
+        if (snackbarType == TranslateSnackbarType.NEVER_TRANSLATE) {
+            createAndShowSnackbar(getContext().getString(R.string.translate_snackbar_language_never,
+                                          mOptions.sourceLanguageName()),
+                    Snackbar.UMA_TRANSLATE_NEVER);
+        } else if (snackbarType == TranslateSnackbarType.ALWAYS_TRANSLATE) {
+            createAndShowSnackbar(
+                    getContext().getString(R.string.translate_snackbar_always_translate,
+                            mOptions.sourceLanguageName(), mOptions.targetLanguageName()),
+                    Snackbar.UMA_TRANSLATE_ALWAYS);
+        } else if (snackbarType == TranslateSnackbarType.NEVER_TRANSLATE_SITE) {
+            createAndShowSnackbar(getContext().getString(R.string.translate_snackbar_site_never),
+                    Snackbar.UMA_TRANSLATE_NEVER_SITE);
+        }
+    }
+
+    private void createAndShowSnackbar(String title, int type) {
+        if (getSnackbarManager() == null) {
+            return;
+        }
+        getSnackbarManager().showSnackbar(Snackbar.make(title, new TranslateSnackbarController(),
+                                                          Snackbar.TYPE_NOTIFICATION, type)
+                                                  .setSingleLine(false));
+    }
+
     private native void nativeApplyStringTranslateOption(
             long nativeTranslateCompactInfoBar, int option, String value);
     private native void nativeApplyBoolTranslateOption(
             long nativeTranslateCompactInfoBar, int option, boolean value);
 }