[Storage] Android - ManageSpace UI, Important Origins, and CBD Dialog

chrome/android/java/src/org/chromium/chrome/browser/preferences/privacy/ConfirmImportantSitesDialogFragment.java

Index: chrome/android/java/src/org/chromium/chrome/browser/preferences/privacy/ConfirmImportantSitesDialogFragment.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/preferences/privacy/ConfirmImportantSitesDialogFragment.java b/chrome/android/java/src/org/chromium/chrome/browser/preferences/privacy/ConfirmImportantSitesDialogFragment.java
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+// 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.chrome.browser.preferences.privacy;
+
+import android.app.Activity;
+import android.app.Dialog;
+import android.app.DialogFragment;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.support.v7.app.AlertDialog;
+import android.util.LruCache;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.CheckedTextView;
+import android.widget.ListView;
+
+import org.chromium.base.ApiCompatibilityUtils;
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.favicon.FaviconHelper;
+import org.chromium.chrome.browser.favicon.FaviconHelper.FaviconImageCallback;
+import org.chromium.chrome.browser.preferences.PrefServiceBridge;
+import org.chromium.chrome.browser.profiles.Profile;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Modal dialog that shows a list of important domains to the user which they can uncheck. Used to
+ * allow the user to exclude domains from being cleared by the clear browsing data function.
+ * We use proper bundle construction (through the {@link #newInstance(String[])} method) and
+ * onActivityResult return conventions.
+ */
+public class ConfirmImportantSitesDialogFragment extends DialogFragment {
+    private class ClearBrowsingDataAdapter extends ArrayAdapter<String> {
+        String[] mDomains;
+        private final Drawable mDefaultFavicon;
+        private final int mFaviconSize;
+
+        private ClearBrowsingDataAdapter(String[] domains) {
+            super(getActivity(), R.layout.select_dialog_multichoice_material, domains);
+            mDomains = domains;
+            Resources resources = getActivity().getResources();
+            mFaviconSize = resources.getDimensionPixelSize(R.dimen.default_favicon_size);
+            mDefaultFavicon =
+                    ApiCompatibilityUtils.getDrawable(resources, R.drawable.default_favicon);
+        }
+
+        @Override
+        public int getCount() {
+            return mDomains.length;
+        }
+
+        @Override
+        public boolean hasStableIds() {
+            return true;
+        }
+
+        @Override
+        public View getView(int position, View convertView, ViewGroup parent) {
+            View childView = convertView;
+            if (childView == null) {
+                LayoutInflater inflater = LayoutInflater.from(getActivity());
+                childView = inflater.inflate(
+                        R.layout.select_dialog_multichoice_material, parent, false);
+
+                ViewAndFaviconHolder viewHolder = new ViewAndFaviconHolder();
+                viewHolder.textView = (CheckedTextView) childView;
+                childView.setTag(viewHolder);
+            }
+            ViewAndFaviconHolder viewHolder = (ViewAndFaviconHolder) childView.getTag();
+            configureChildView(position, viewHolder);
+            return childView;
+        }
+
+        public void configureChildView(int position, ViewAndFaviconHolder viewHolder) {
+            String domain = mDomains[position];
+            viewHolder.textView.setChecked(!mDeselectedDomains.contains(domain));
+            viewHolder.textView.setText(domain);
+            loadLocalFavicon(viewHolder, transformDomainToOrigin(domain));
+        }
+
+        public void onClick(int position, View view) {
+            String domain = mDomains[position];
+            ViewAndFaviconHolder viewHolder = (ViewAndFaviconHolder) view.getTag();
+            if (mDeselectedDomains.contains(domain)) {
+                mDeselectedDomains.remove(domain);
+                viewHolder.textView.setChecked(true);
+            } else {
+                mDeselectedDomains.add(domain);
+                viewHolder.textView.setChecked(false);
+            }
+        }
+
+        private void loadLocalFavicon(final ViewAndFaviconHolder viewHolder, final String url) {
+            Drawable image;
+            if (url == null) {
+                // URL is null for print jobs, for example.
+                image = mDefaultFavicon;
+            } else {
+                image = mFaviconCache.getLocalFaviconImage(url);
+                if (image == null) {
+                    FaviconImageCallback imageCallback = new FaviconImageCallback() {
+                        @Override
+                        public void onFaviconAvailable(Bitmap bitmap, String iconUrl) {
+                            if (this != viewHolder.imageCallback) return;
+                            Drawable image = getFaviconDrawable(bitmap);
+                            image = (image == null) ? mDefaultFavicon : image;
+                            mFaviconCache.putLocalFaviconImage(url, image);
+                            viewHolder.textView.setCheckMarkDrawable(image);
+                        }
+                    };
+                    viewHolder.imageCallback = imageCallback;
+                    mFaviconHelper.getLocalFaviconImageForURL(
+                            mProfile, url, mFaviconSize, imageCallback);
+                    image = mDefaultFavicon;
+                }
+            }
+            viewHolder.textView.setCheckMarkDrawable(image);
+        }
+
+        private Drawable getFaviconDrawable(Bitmap image) {
+            if (image == null) return null;
+            return new BitmapDrawable(getActivity().getResources(),
+                    Bitmap.createScaledBitmap(image, mFaviconSize, mFaviconSize, true));
+        }
+    }
+
+    private static class FaviconCache {
+        private final LruCache<String, Drawable> mMemoryCache;
+
+        public FaviconCache(int size) {
+            mMemoryCache = new LruCache<String, Drawable>(size);
+        }
+
+        public Drawable getLocalFaviconImage(String url) {
+            return mMemoryCache.get(url);
+        }
+
+        public void putLocalFaviconImage(String url, Drawable image) {
+            mMemoryCache.put(url, image);
+        }
+    }
+
+    /**
+     * ViewHolder class optimizes looking up table row fields. findViewById is only called once
+     * per row view initialization, and the references are cached here. Also stores a reference to
+     * the favicon image callback; so that we can make sure we load the correct favicon.
+     */
+    private static class ViewAndFaviconHolder {
+        public CheckedTextView textView;
+        public FaviconImageCallback imageCallback;
+    }
+
+    /**
+     * Constructs a new instance of the important sites dialog fragment.
+     * @param importantDomains The list of important domains to display.
+     * @return An instance of ConfirmImportantSitesDialogFragment with the bundle arguments set.
+     */
+    public static ConfirmImportantSitesDialogFragment newInstance(String[] importantDomains) {
+        ConfirmImportantSitesDialogFragment dialogFragment =
+                new ConfirmImportantSitesDialogFragment();
+        Bundle bundle = new Bundle();
+        bundle.putStringArray(IMPORTANT_DOMAINS_TAG, importantDomains);
+        dialogFragment.setArguments(bundle);
+        return dialogFragment;
+    }
+
+    /** The tag used when showing the clear browsing fragment. */
+    public static final String FRAGMENT_TAG = "ConfirmImportantSitesDialogFragment";
+
+    /**
+     * The tag used to return the string array of deselected domains. These are meant to NOT be
+     * cleared.
+     */
+    public static final String DESELECTED_DOMAINS_TAG = "DeselectedDomains";
+
+    /** The tag used to store the important domains in the bundle. */
+    private static final String IMPORTANT_DOMAINS_TAG = "ImportantDomains";
+
+    /** Transforms a domain into an origin for favicon lookup. */
+    private static String transformDomainToOrigin(String domain) {
+        return "http://www." + domain;
+    }
+
+    /** Array of important registerable domains we're showing to the user. */
+    private String[] mImportantDomains;
+    /** The set of domains that the user has deselected. */
+    private Set<String> mDeselectedDomains;
+    /** The alert dialog shown to the user. */
+    private AlertDialog mDialog;
+    /** Our adapter that we use with the list view in the dialog. */
+    private ClearBrowsingDataAdapter mAdapter;
+    /** We use this to fetch favicon images. */
+    private FaviconHelper mFaviconHelper;
+    /**
+     * We store favicon images here so we don't have to reload them when Android wants to refresh
+     * each row.
+     */
+    private FaviconCache mFaviconCache;
+    private Profile mProfile;
+
+    protected ConfirmImportantSitesDialogFragment() {
+        mProfile = Profile.getLastUsedProfile();
+        mFaviconHelper = new FaviconHelper();
+        mDeselectedDomains = new HashSet<>();
+        mFaviconCache = new FaviconCache(PrefServiceBridge.getMaxImportantSites());
+    }
+
+    @Override
+    public void setArguments(Bundle args) {
+        super.setArguments(args);
+        mImportantDomains = args.getStringArray(IMPORTANT_DOMAINS_TAG);
+    }
+
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        mAdapter = new ClearBrowsingDataAdapter(mImportantDomains);
+        DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                if (which == AlertDialog.BUTTON_POSITIVE) {
+                    // Return our deselected domains.
+                    Intent data = getActivity().getIntent();
+                    String[] deselectedDomains = mDeselectedDomains.toArray(new String[0]);
+                    data.putExtra(DESELECTED_DOMAINS_TAG, deselectedDomains);
+                    getTargetFragment().onActivityResult(
+                            getTargetRequestCode(), Activity.RESULT_OK, data);
+                } else {
+                    getTargetFragment().onActivityResult(getTargetRequestCode(),
+                            Activity.RESULT_CANCELED, getActivity().getIntent());
+                }
+            }
+        };
+        // We create our own ListView, as AlertDialog doesn't let us set a message and a list
+        // adapter at the same time.
+        ListView listView = (ListView) getActivity().getLayoutInflater().inflate(
+                R.layout.select_dialog_listview, null);
+        listView.setAdapter(mAdapter);
+        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
+                mAdapter.onClick(position, v);
+            }
+        });
+        final AlertDialog.Builder builder =
+                new AlertDialog.Builder(getActivity(), R.style.AlertDialogTheme)
+                        .setTitle(R.string.storage_clear_site_storage_title)
+                        .setMessage(R.string.clear_browsing_data_important_dialog_text)
+                        .setPositiveButton(R.string.clear_data_delete, listener)
+                        .setNegativeButton(R.string.cancel, listener)
+                        .setView(listView);
+        mDialog = builder.create();
+
+        return mDialog;
+    }
+}