Show favicons in Site Settings lists.

BUG=451374

Review URL: https://codereview.chromium.org/866713003

Cr-Commit-Position: refs/heads/master@{#313685}

chrome/android/java/src/org/chromium/chrome/browser/preferences/website/Website.java

@@ -229,6 +229,10 @@ public class Website implements Serializable {
         mTitle = address.getTitle();
     }
 
+    public WebsiteAddress getAddress() {
+        return mAddress;
+    }
+
     public String getTitle() {
         return mTitle;
     }

chrome/android/java/src/org/chromium/chrome/browser/preferences/website/WebsitePreference.java

@@ -5,13 +5,21 @@
 package org.chromium.chrome.browser.preferences.website;
 
 import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.drawable.BitmapDrawable;
+import android.net.Uri;
 import android.preference.Preference;
 import android.view.View;
 import android.widget.ImageView;
+import android.widget.LinearLayout;
 import android.widget.TextView;
 
 import org.chromium.base.annotations.SuppressFBWarnings;
 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.profiles.Profile;
+import org.chromium.chrome.browser.widget.RoundedIconGenerator;
 
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
@@ -22,13 +30,27 @@ import java.text.NumberFormat;
  * access the site has.)
  */
 @SuppressFBWarnings("EQ_COMPARETO_USE_OBJECT_EQUALS")
-class WebsitePreference extends Preference {
+class WebsitePreference extends Preference implements FaviconImageCallback {
     private final Website mSite;
     private final String mCategoryFilter;
     private final WebsiteSettingsCategoryFilter mFilter;
 
     private static final int TEXT_SIZE_SP = 13;
 
+    // Loads the favicons asynchronously.
+    private FaviconHelper mFaviconHelper;
+
+    // Whether the favicon has been fetched already.
+    private boolean mFaviconFetched = false;
+
+    // Metrics for favicon processing.
+    private static final int FAVICON_CORNER_RADIUS_DP = 2;
+    private static final int FAVICON_SIZE_DP = 16;
+    private static final int FAVICON_TEXT_SIZE_SP = 10;
+    private static final int FAVICON_BACKGROUND_COLOR = 0xff969696;
+    private static final int FAVICON_PARENT_MINWIDTH_DP = 55;
+    private static final int FAVICON_PARENT_PADDING_DP = 12;
+
     WebsitePreference(Context context, Website site, String categoryFilter) {
         super(context);
         mSite = site;
@@ -49,6 +71,39 @@ class WebsitePreference extends Preference {
         return mSite;
     }
 
+    @Override
+    public void onFaviconAvailable(Bitmap image, String iconUrl) {
+        mFaviconHelper.destroy();
+        mFaviconHelper = null;
+        if (image == null) {
+            // Invalid favicon, produce a generic one.
+            RoundedIconGenerator faviconGenerator = new RoundedIconGenerator(
+                    getContext(), FAVICON_SIZE_DP, FAVICON_SIZE_DP,
+                    FAVICON_CORNER_RADIUS_DP, FAVICON_BACKGROUND_COLOR,
+                    FAVICON_TEXT_SIZE_SP);
+            image = faviconGenerator.generateIconForUrl(faviconUrl());
+        }
+
+        setIcon(new BitmapDrawable(getContext().getResources(), image));
+    }
+
+    /**
+     * Returns the url of the site to fetch a favicon for.
+     */
+    private String faviconUrl() {
+        String origin = mSite.getAddress().getOrigin();
+        if (origin == null) {
+            return "http://" + mSite.getAddress().getHost();
+        }
+
+        Uri uri = Uri.parse(origin);
+        if (uri.getPort() != -1) {
+            // Remove the port.
+            uri = uri.buildUpon().authority(uri.getHost()).build();
+        }
+        return uri.toString();
+    }
+
     private void refresh() {
         setTitle(mSite.getTitle());
         String subtitleText = mSite.getSummary();
@@ -96,6 +151,31 @@ class WebsitePreference extends Preference {
                 mediaCaptureIcon.setVisibility(View.VISIBLE);
             }
         }
+
+        float density = getContext().getResources().getDisplayMetrics().density;
+        if (!mFaviconFetched) {
+            // Start the favicon fetching. Will respond in onFaviconAvailable.
+            mFaviconHelper = new FaviconHelper();
+            if (!mFaviconHelper.getLocalFaviconImageForURL(
+                    Profile.getLastUsedProfile(), faviconUrl(),
+                    FaviconHelper.FAVICON | FaviconHelper.TOUCH_ICON
+                            | FaviconHelper.TOUCH_PRECOMPOSED_ICON,
+                    Math.round(FAVICON_SIZE_DP * density),
+                    this)) {
+                onFaviconAvailable(null, null);
+            }
+            mFaviconFetched = true;
+        }
+
+        ImageView icon = (ImageView) view.findViewById(android.R.id.icon);
+        View parent = (View) icon.getParent();
+        if (parent instanceof LinearLayout) {
+            LinearLayout parentLayout = (LinearLayout) parent;
+            int minWidth = Math.round(FAVICON_PARENT_MINWIDTH_DP * density);
+            int padding =  Math.round(FAVICON_PARENT_PADDING_DP * density);
+            parentLayout.setMinimumWidth(minWidth);
+            parentLayout.setPadding(padding, 0, padding, 0);
+        }
     }
 
     /**