[Download Home] Pull out DownloadHistoryWrapper.ItemViewHolder

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

Index: chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryItemViewHolder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryItemViewHolder.java b/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryItemViewHolder.java
new file mode 100644
index 0000000000000000000000000000000000000000..0352799f1efb3892890141448355a79725033bbf
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/ui/DownloadHistoryItemViewHolder.java
@@ -0,0 +1,104 @@
+// 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.download.ui;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.support.v7.widget.RecyclerView;
+import android.text.TextUtils;
+import android.text.format.Formatter;
+import android.view.View;
+import android.widget.TextView;
+
+import org.chromium.base.VisibleForTesting;
+import org.chromium.chrome.R;
+import org.chromium.components.url_formatter.UrlFormatter;
+
+/** Holds onto a View that displays information about a downloaded file. */
+public class DownloadHistoryItemViewHolder
+        extends RecyclerView.ViewHolder implements ThumbnailProvider.ThumbnailRequest {
+    private final DownloadItemView mItemView;
+    private final TextView mFilenameView;
+    private final TextView mHostnameView;
+    private final TextView mFilesizeView;
+
+    private DownloadHistoryItemWrapper mItem;
+
+    public DownloadHistoryItemViewHolder(View itemView) {
+        super(itemView);
+
+        assert itemView instanceof DownloadItemView;
+        mItemView = (DownloadItemView) itemView;
+
+        mFilenameView = (TextView) itemView.findViewById(R.id.filename_view);
+        mHostnameView = (TextView) itemView.findViewById(R.id.hostname_view);
+        mFilesizeView = (TextView) itemView.findViewById(R.id.filesize_view);
+    }
+
+    @Override
+    public String getFilePath() {
+        return mItem == null ? null : mItem.getFilePath();
+    }
+
+    @Override
+    public void onThumbnailRetrieved(String filePath, Bitmap thumbnail) {
+        if (TextUtils.equals(getFilePath(), filePath) && thumbnail != null
+                && thumbnail.getWidth() != 0 && thumbnail.getHeight() != 0) {
+            mItemView.setThumbnailBitmap(thumbnail);
+        }
+    }
+
+    /** Set up the View for a particular download item. */
+    void displayItem(BackendProvider provider, DownloadHistoryItemWrapper item) {
+        // Cancel any previous thumbnail request for the previously displayed item.
+        ThumbnailProvider thumbnailProvider = provider.getThumbnailProvider();
+        thumbnailProvider.cancelRetrieval(this);
+
+        Context context = mFilesizeView.getContext();
+        mFilenameView.setText(item.getDisplayFileName());
+        mHostnameView.setText(
+                UrlFormatter.formatUrlForSecurityDisplay(item.getUrl(), false));
+        mFilesizeView.setText(
+                Formatter.formatFileSize(context, item.getFileSize()));
+        mItem = item;
+
+        // Asynchronously grab a thumbnail for the file if it might have one.
+        int fileType = item.getFilterType();
+        if (fileType == DownloadFilter.FILTER_IMAGE) {
+            thumbnailProvider.getThumbnail(this);
+        } else {
+            // TODO(dfalcantara): Get thumbnails for audio and video files when possible.
+        }
+
+        // Pick what icon to display for the item.
+        int iconResource = R.drawable.ic_drive_file_white_24dp;
+        switch (fileType) {
+            case DownloadFilter.FILTER_PAGE:
+                iconResource = R.drawable.ic_drive_site_white_24dp;
+                break;
+            case DownloadFilter.FILTER_VIDEO:
+                iconResource = R.drawable.ic_play_arrow_white_24dp;
+                break;
+            case DownloadFilter.FILTER_AUDIO:
+                iconResource = R.drawable.ic_music_note_white_24dp;
+                break;
+            case DownloadFilter.FILTER_IMAGE:
+                iconResource = R.drawable.ic_image_white_24dp;
+                break;
+            case DownloadFilter.FILTER_DOCUMENT:
+                iconResource = R.drawable.ic_drive_text_white_24dp;
+                break;
+            default:
+        }
+
+        // Initialize the DownloadItemView.
+        mItemView.initialize(item, iconResource);
+    }
+
+    @VisibleForTesting
+    public DownloadItemView getItemView() {
+        return mItemView;
+    }
+}