[Android] Width constrain bookmarks and downloads UIs

chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryAdapter.java

Index: chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryAdapter.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryAdapter.java b/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryAdapter.java
index c4df1df71446dc6dbd32174b29ef20ea916cb8ed..ffd9d6e79b86b559e22d447801a4e1fed71e8ff7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryAdapter.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryAdapter.java
@@ -5,6 +5,7 @@
 package org.chromium.chrome.browser.download.ui;
 
 import android.content.ComponentName;
+import android.support.annotation.Nullable;
 import android.support.v7.widget.RecyclerView.ViewHolder;
 import android.text.TextUtils;
 import android.view.LayoutInflater;
@@ -25,6 +26,9 @@ import org.chromium.chrome.browser.download.ui.DownloadManagerUi.DownloadUiObser
 import org.chromium.chrome.browser.offlinepages.downloads.OfflinePageDownloadBridge;
 import org.chromium.chrome.browser.offlinepages.downloads.OfflinePageDownloadItem;
 import org.chromium.chrome.browser.widget.DateDividedAdapter;
+import org.chromium.chrome.browser.widget.displaystyle.MarginResizer;
+import org.chromium.chrome.browser.widget.displaystyle.UiConfig;
+import org.chromium.chrome.browser.widget.selection.SelectableListLayout;
 import org.chromium.chrome.browser.widget.selection.SelectionDelegate;
 import org.chromium.components.offline_items_collection.ContentId;
 import org.chromium.content_public.browser.DownloadState;
@@ -156,6 +160,10 @@ public class DownloadHistoryAdapter extends DateDividedAdapter
     private int mFilter = DownloadFilter.FILTER_ALL;
     private String mSearchQuery = EMPTY_QUERY;
     private SpaceDisplay mSpaceDisplay;
+    private boolean mIsSearching;
+
+    @Nullable // This may be null during tests.
+    private UiConfig mUiConfig;
 
     DownloadHistoryAdapter(boolean showOffTheRecord, ComponentName parentComponent) {
         mShowOffTheRecord = showOffTheRecord;
@@ -166,8 +174,14 @@ public class DownloadHistoryAdapter extends DateDividedAdapter
         setHasStableIds(true);
     }
 
-    public void initialize(BackendProvider provider) {
+    /**
+     * Initializes the adapter.
+     * @param provider The {@link BackendProvider} that provides classes needed by the adapter.
+     * @param uiConfig The UiConfig used to observe display style changes.
+     */
+    public void initialize(BackendProvider provider, @Nullable UiConfig uiConfig) {
         mBackendProvider = provider;
+        mUiConfig = uiConfig;
 
         DownloadItemSelectionDelegate selectionDelegate =
                 (DownloadItemSelectionDelegate) mBackendProvider.getSelectionDelegate();
@@ -296,6 +310,7 @@ public class DownloadHistoryAdapter extends DateDividedAdapter
                         .inflate(R.layout.offline_download_header, parent, false);
         offlineHeader.setAdapter(this);
         offlineHeader.setSelectionDelegate((DownloadItemSelectionDelegate) getSelectionDelegate());
+        if (mUiConfig != null) offlineHeader.configureWideDisplayStyle(mUiConfig);
         return new SubsectionHeaderViewHolder(offlineHeader);
     }
 
@@ -308,10 +323,23 @@ public class DownloadHistoryAdapter extends DateDividedAdapter
     }
 
     @Override
+    protected DateViewHolder createDateViewHolder(ViewGroup parent) {
+        DateViewHolder viewHolder = super.createDateViewHolder(parent);
+        if (mUiConfig != null) {
+            MarginResizer.createWithViewAdapter(viewHolder.itemView, mUiConfig,
+                    parent.getResources().getDimensionPixelSize(R.dimen.list_item_default_margin),
+                    SelectableListLayout.getDefaultListItemLateralShadowSizePx(
+                            parent.getResources()));
+        }
+        return viewHolder;
+    }
+
+    @Override
     public ViewHolder createViewHolder(ViewGroup parent) {
         DownloadItemView v = (DownloadItemView) LayoutInflater.from(parent.getContext()).inflate(
                 R.layout.download_item_view, parent, false);
         v.setSelectionDelegate(getSelectionDelegate());
+        if (mUiConfig != null) v.configureWideDisplayStyle(mUiConfig);
         mViews.add(v);
         return new DownloadHistoryItemViewHolder(v);
     }
@@ -334,6 +362,13 @@ public class DownloadHistoryAdapter extends DateDividedAdapter
         if (mSpaceDisplay == null) {
             mSpaceDisplay = new SpaceDisplay(parent, this);
             registerAdapterDataObserver(mSpaceDisplay);
+            if (mUiConfig != null) {
+                MarginResizer.createWithViewAdapter(mSpaceDisplay.getView(), mUiConfig,
+                        parent.getResources().getDimensionPixelSize(
+                                R.dimen.list_item_default_margin),
+                        SelectableListLayout.getDefaultListItemLateralShadowSizePx(
+                                parent.getResources()));
+            }
         }
 
         mSpaceDisplay.onChanged();
@@ -482,6 +517,7 @@ public class DownloadHistoryAdapter extends DateDividedAdapter
      * @param query The text to search for.
      */
     void search(String query) {
+        mIsSearching = true;
         mSearchQuery = query;
         filter(mFilter);
     }
@@ -490,6 +526,7 @@ public class DownloadHistoryAdapter extends DateDividedAdapter
      * Called when a search is ended.
      */
     void onEndSearch() {
+        mIsSearching = false;
         mSearchQuery = EMPTY_QUERY;
         filter(mFilter);
     }
@@ -523,7 +560,7 @@ public class DownloadHistoryAdapter extends DateDividedAdapter
         }
 
         clear(false);
-        if (!filteredTimedItems.isEmpty()) addHeader();
+        if (!filteredTimedItems.isEmpty() && !mIsSearching) addHeader();
         loadItems(filteredTimedItems);
     }