Download Home - Build new prefetch view

This is the initial implementation of a prefetch view item for the new
download home UI.  This change includes the following:
- Builds out the ViewHolder that can handle thumbnails (automatically
processes it and pushes it to the view).
- Builds out the ViewHolder that can handle a 3-dot menu (automatically
handles the callback information).
- Adds the initial XML for the prefetched item.

BUG=849584

Change-Id: I965df4b6bdffc73f084f2f18c15588488b4beb0f
Reviewed-on: https://chromium-review.googlesource.com/1087319
Commit-Queue: David Trainor <dtrainor@chromium.org>
Reviewed-by: Min Qin <qinmin@chromium.org>
Reviewed-by: Shakti Sahu <shaktisahu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565079}

chrome/android/BUILD.gn

@@ -110,6 +110,7 @@ android_resources("chrome_java_resources") {
     "//third_party/android_media:android_media_resources",
     "//third_party/android_tools:android_support_design_java",
     "//third_party/android_tools:android_support_v7_appcompat_java",
+    "//third_party/android_tools:android_support_v7_gridlayout_java",
     "//third_party/android_tools:android_support_v7_recyclerview_java",
   ]
   custom_package = "org.chromium.chrome"

chrome/android/java/res/layout/download_manager_prefetch_item.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2018 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.
+-->
+
+<android.support.v7.widget.GridLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="114dp"
+    android:clickable="true"
+    android:background="@android:color/white"
+    app:columnCount="4"
+    app:rowCount="4">
+    <ImageView
+        android:id="@+id/thumbnail"
+        android:layout_width="114dp"
+        android:layout_height="114dp"
+        android:layout_marginEnd="9dp"
+        android:scaleType="fitCenter"
+        android:background="@color/google_grey_100"
+        app:layout_column="0"
+        app:layout_row="0"
+        app:layout_rowSpan="4"
+        tools:ignore="ContentDescription" />
+
+    <Space
+        android:layout_width="wrap_content"
+        android:layout_height="0dp"
+        app:layout_gravity="fill"
+        app:layout_column="0"
+        app:layout_row="3"
+        app:layout_columnSpan="4" />
+
+    <TextView
+        android:id="@+id/title"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="12dp"
+        android:minHeight="40dp"
+        android:maxLines="2"
+        android:ellipsize="end"
+        android:textAppearance="@style/BlackBodyDefault"
+        android:textAlignment="viewStart"
+        app:layout_column="1"
+        app:layout_row="0"
+        app:layout_columnSpan="2"
+        app:layout_gravity="fill_horizontal" />
+
+    <TextView
+        android:id="@+id/caption"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="8dp"
+        android:maxLines="1"
+        android:ellipsize="end"
+        android:textAppearance="@style/BlackCaption"
+        android:textAlignment="viewStart"
+        app:layout_column="1"
+        app:layout_row="1"
+        app:layout_columnSpan="3"
+        app:layout_gravity="fill_horizontal" />
+
+    <TextView
+        android:id="@+id/timestamp"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:maxLines="1"
+        android:ellipsize="end"
+        android:textAppearance="@style/BlackCaption"
+        android:textAlignment="viewStart"
+        app:layout_column="1"
+        app:layout_row="2"
+        app:layout_gravity="center_vertical" />
+
+    <ImageView
+        android:layout_width="12dp"
+        android:layout_height="12dp"
+        android:layout_marginStart="4dp"
+        android:src="@drawable/offline_pin_round"
+        android:scaleType="centerInside"
+        android:tint="@color/black_alpha_65"
+        app:layout_column="2"
+        app:layout_row="2"
+        app:layout_columnSpan="2"
+        app:layout_gravity="start|center_vertical"
+        tools:ignore="ContentDescription" />
+
+    <include layout="@layout/list_menu_button"
+        android:layout_width="48dp"
+        android:layout_height="48dp"
+        android:paddingTop="12dp"
+        app:layout_column="3"
+        app:layout_row="0" />
+</android.support.v7.widget.GridLayout>
\ No newline at end of file

chrome/android/java/res/values/dimens.xml

@@ -573,4 +573,8 @@
     <!-- Download manager dimensions -->
     <dimen name="download_manager_image_width">150dp</dimen>
     <dimen name="download_manager_image_padding">1dp</dimen>
+    <dimen name="download_manager_generic_thumbnail_size">48dp</dimen>
+    <dimen name="download_manager_prefetch_thumbnail_size">114dp</dimen>
+    <dimen name="download_manager_prefetch_horizontal_margin">16dp</dimen>
+    <dimen name="download_manager_prefetch_vertical_margin">12dp</dimen>
 </resources>

chrome/android/java/src/org/chromium/chrome/browser/download/home/glue/OfflineContentProviderGlue.java

@@ -73,7 +73,7 @@ public class OfflineContentProviderGlue implements OfflineContentProvider.Observ
         if (LegacyHelpers.isLegacyDownload(item.id)) {
             mDownloadProvider.removeItem(item);
         } else {
-            mProvider.openItem(item.id);
+            mProvider.removeItem(item.id);
         }
     }
 

chrome/android/java/src/org/chromium/chrome/browser/download/home/list/DateOrderedListView.java

@@ -27,6 +27,8 @@ class DateOrderedListView {
 
     private final int mImageWidthPx;
     private final int mImagePaddingPx;
+    private final int mPrefetchVerticalPaddingPx;
+    private final int mPrefetchHorizontalPaddingPx;
 
     private final RecyclerView mView;
 
@@ -38,6 +40,10 @@ class DateOrderedListView {
                 context.getResources().getDimensionPixelSize(R.dimen.download_manager_image_width);
         mImagePaddingPx = context.getResources().getDimensionPixelOffset(
                 R.dimen.download_manager_image_padding);
+        mPrefetchHorizontalPaddingPx = context.getResources().getDimensionPixelSize(
+                R.dimen.download_manager_prefetch_horizontal_margin);
+        mPrefetchVerticalPaddingPx = context.getResources().getDimensionPixelSize(
+                R.dimen.download_manager_prefetch_vertical_margin);
 
         DateOrderedListViewBinder listViewBinder = new DateOrderedListViewBinder();
         DateOrderedListViewAdapter adapter = new DateOrderedListViewAdapter(mModel, listViewBinder);
@@ -107,6 +113,12 @@ class DateOrderedListView {
                     outRect.top = mImagePaddingPx;
                     outRect.bottom = mImagePaddingPx;
                     break;
+                case ListUtils.PREFETCH:
+                    outRect.left = mPrefetchHorizontalPaddingPx;
+                    outRect.right = mPrefetchHorizontalPaddingPx;
+                    outRect.top = mPrefetchVerticalPaddingPx / 2;
+                    outRect.bottom = mPrefetchVerticalPaddingPx / 2;
+                    break;
             }
         }
     }

chrome/android/java/src/org/chromium/chrome/browser/download/home/list/DateOrderedListViewBinder.java

@@ -23,13 +23,15 @@ class DateOrderedListViewBinder implements ViewBinder<DecoratedListItemModel, Li
             case ListUtils.IN_PROGRESS:
                 return new ListItemViewHolder.InProgressViewHolder(parent);
             case ListUtils.GENERIC:
-                return new ListItemViewHolder.GenericViewHolder(parent);
+                return ListItemViewHolder.GenericViewHolder.create(parent);
             case ListUtils.VIDEO:
                 return new ListItemViewHolder.VideoViewHolder(parent);
             case ListUtils.IMAGE:
                 return new ListItemViewHolder.ImageViewHolder(parent);
             case ListUtils.CUSTOM_VIEW:
                 return new ListItemViewHolder.CustomViewHolder(parent);
+            case ListUtils.PREFETCH:
+                return ListItemViewHolder.PrefetchViewHolder.create(parent);
         }
 
         assert false;

chrome/android/java/src/org/chromium/chrome/browser/download/home/list/ListUtils.java

@@ -19,7 +19,7 @@ import java.lang.annotation.RetentionPolicy;
 class ListUtils {
     /** The potential types of list items that could be displayed. */
     @Retention(RetentionPolicy.SOURCE)
-    @IntDef({DATE, IN_PROGRESS, GENERIC, VIDEO, IMAGE, CUSTOM_VIEW})
+    @IntDef({DATE, IN_PROGRESS, GENERIC, VIDEO, IMAGE, CUSTOM_VIEW, PREFETCH})
     public @interface ViewType {}
     public static final int DATE = 0;
     public static final int IN_PROGRESS = 1;
@@ -27,6 +27,7 @@ class ListUtils {
     public static final int VIDEO = 3;
     public static final int IMAGE = 4;
     public static final int CUSTOM_VIEW = 5;
+    public static final int PREFETCH = 6;
 
     private ListUtils() {}
 
@@ -43,6 +44,7 @@ class ListUtils {
             if (item instanceof OfflineItemListItem) {
                 OfflineItemListItem offlineItem = (OfflineItemListItem) item;
 
+                if (offlineItem.item.isSuggested) return ListUtils.PREFETCH;
                 if (offlineItem.item.state == OfflineItemState.IN_PROGRESS) {
                     return ListUtils.IN_PROGRESS;
                 }

chrome/android/java/src/org/chromium/chrome/browser/download/home/list/UiUtils.java

@@ -9,11 +9,15 @@ import android.text.format.DateUtils;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.chrome.R;
+import org.chromium.chrome.browser.download.DownloadUtils;
+import org.chromium.chrome.browser.util.MathUtils;
 import org.chromium.components.offline_items_collection.OfflineItem;
 import org.chromium.components.offline_items_collection.OfflineItemFilter;
+import org.chromium.components.url_formatter.UrlFormatter;
 
 import java.util.Calendar;
 import java.util.Date;
+import java.util.concurrent.TimeUnit;
 
 /** A set of helper utility methods for the UI. */
 public final class UiUtils {
@@ -50,6 +54,45 @@ public final class UiUtils {
         return builder;
     }
 
+    /**
+     * Converts {@code date} to a string meant to be used as a prefetched item timestamp.
+     * @param date The {@link Date} to convert.
+     * @return     The {@link CharSequence} representing the timestamp.
+     */
+    public static CharSequence generatePrefetchTimestamp(Date date) {
+        Context context = ContextUtils.getApplicationContext();
+
+        Calendar calendar1 = CalendarFactory.get();
+        Calendar calendar2 = CalendarFactory.get();
+
+        calendar1.setTimeInMillis(System.currentTimeMillis());
+        calendar2.setTime(date);
+
+        if (CalendarUtils.isSameDay(calendar1, calendar2)) {
+            int hours =
+                    (int) MathUtils.clamp(TimeUnit.MILLISECONDS.toHours(calendar1.getTimeInMillis()
+                                                  - calendar2.getTimeInMillis()),
+                            1, 23);
+            return context.getResources().getQuantityString(
+                    R.plurals.download_manager_n_hours, hours, hours);
+        } else {
+            return DateUtils.formatDateTime(context, date.getTime(), DateUtils.FORMAT_SHOW_YEAR);
+        }
+    }
+
+    /**
+     * Generates a caption for a prefetched item.
+     * @param item The {@link OfflineItem} to generate a caption for.
+     * @return     The {@link CharSequence} representing the caption.
+     */
+    public static CharSequence generatePrefetchCaption(OfflineItem item) {
+        Context context = ContextUtils.getApplicationContext();
+        String displaySize = DownloadUtils.getStringForBytes(context, item.totalSizeBytes);
+        String displayUrl = UrlFormatter.formatUrlForSecurityDisplayOmitScheme(item.pageUrl);
+        return context.getString(
+                R.string.download_manager_prefetch_caption, displayUrl, displaySize);
+    }
+
     /** @return Whether or not {@code item} can show a thumbnail in the UI. */
     public static boolean canHaveThumbnails(OfflineItem item) {
         switch (item.filter) {

chrome/android/java/strings/android_chrome_strings.grd

@@ -2333,6 +2333,12 @@ To obtain new licenses, connect to the internet and play your downloaded content
       <message name="IDS_DOWNLOAD_MANAGER_PREFETCH_TAB" desc="Tab text for showing downloaded popular content.">
         Popular Content
       </message>
+      <message name="IDS_DOWNLOAD_MANAGER_PREFETCH_CAPTION" desc="Text containing the prefetched article description.">
+        <ph name="DESCRIPTION">%1$s<ex>www.example.com</ex></ph> - <ph name="FILE_SIZE">%2$s<ex>1.56 MB</ex></ph>
+      </message>
+      <message name="IDS_DOWNLOAD_MANAGER_N_HOURS" desc="How many hours ago an item was downloaded (if downloaded on the same day). [ICU Syntax]">
+        {HOURS, plural, =1 {# hr} other {# hrs}}
+      </message>
 
       <!-- Browsing History UI -->
       <message name="IDS_HISTORY_MANAGER_EMPTY" desc="Indicates that there are no browsing history items.">