Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/ntp/RecentTabsGroupView.java

+// Copyright 2015 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.ntp;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.drawable.LevelListDrawable;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.RelativeLayout;
+import android.widget.TextView;
+
+import com.google.android.apps.chrome.R;
+
+import org.chromium.chrome.browser.ForeignSessionHelper.ForeignSession;
+import org.chromium.chrome.browser.widget.TintedDrawable;
+import org.chromium.ui.base.DeviceFormFactor;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Header view shown above each group of items on the Recent Tabs page. Shows the name of the
+ * group (e.g. "Recently closed" or "Jim's Laptop"), an icon, last synced time, and a button to
+ * expand or collapse the group.
+ */
+public class RecentTabsGroupView extends RelativeLayout {
+
+    /** Drawable levels for the device type icon and the expand/collapse arrow. */
+    private static final int DRAWABLE_LEVEL_COLLAPSED = 0;
+    private static final int DRAWABLE_LEVEL_EXPANDED = 1;
+
+    private ImageView mDeviceIcon;
+    private ImageView mExpandCollapseIcon;
+    private TextView mDeviceLabel;
+    private TextView mTimeLabel;
+    private long mInitializationTimestamp;
+    private int mDeviceLabelExpandedColor;
+    private int mDeviceLabelCollapsedColor;
+    private int mTimeLabelExpandedColor;
+    private int mTimeLabelCollapsedColor;
+
+    /**
+     * Constructor for inflating from XML.
+     *
+     * @param context The context this view will work in.
+     * @param attrs The attribute set for this view.
+     */
+    public RecentTabsGroupView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        Resources res = getResources();
+        mDeviceLabelExpandedColor = res.getColor(R.color.light_active_color);
+        mDeviceLabelCollapsedColor = res.getColor(R.color.ntp_list_header_text);
+        mTimeLabelExpandedColor = res.getColor(R.color.ntp_list_header_subtext_active);
+        mTimeLabelCollapsedColor = res.getColor(R.color.ntp_list_header_subtext);
+    }
+
+    @Override
+    public void onFinishInflate() {
+        super.onFinishInflate();
+        mDeviceIcon = (ImageView) findViewById(R.id.device_icon);
+        mTimeLabel = (TextView) findViewById(R.id.time_label);
+        mDeviceLabel = (TextView) findViewById(R.id.device_label);
+        mExpandCollapseIcon = (ImageView) findViewById(R.id.expand_collapse_icon);
+
+        // Create drawable for expand/collapse arrow.
+        LevelListDrawable collapseIcon = new LevelListDrawable();
+        collapseIcon.addLevel(DRAWABLE_LEVEL_COLLAPSED, DRAWABLE_LEVEL_COLLAPSED,
+                TintedDrawable.constructTintedDrawable(getResources(), R.drawable.ic_expand));
+        TintedDrawable collapse =
+                TintedDrawable.constructTintedDrawable(getResources(), R.drawable.ic_collapse);
+        collapse.setTint(getResources().getColorStateList(R.color.blue_mode_tint));
+        collapseIcon.addLevel(DRAWABLE_LEVEL_EXPANDED, DRAWABLE_LEVEL_EXPANDED, collapse);
+        mExpandCollapseIcon.setImageDrawable(collapseIcon);
+    }
+
+    /**
+     * Initialize the state of the group view. Should be called immediatly after object creation.
+     *
+     * @param initializationTimestamp The timestamp to compute the time since last session sync.
+     */
+    public void initialize(long initializationTimestamp) {
+        mInitializationTimestamp = initializationTimestamp;
+    }
+
+    /**
+     * Configures the view for currently open tabs.
+     *
+     * @param isExpanded Whether the view is expanded or collapsed.
+     */
+    public void configureForCurrentlyOpenTabs(boolean isExpanded) {
+        mDeviceIcon.setVisibility(View.VISIBLE);
+        mDeviceIcon.setImageResource(DeviceFormFactor.isTablet(getContext())
+                ? R.drawable.recent_tablet : R.drawable.recent_phone);
+        String title = getResources().getString(R.string.recent_tabs_this_device);
+        mDeviceLabel.setText(title);
+        setTimeLabelVisibility(View.GONE);
+        configureExpandedCollapsed(isExpanded);
+    }
+
+    /**
+     * Configures the view for a foreign session.
+     *
+     * @param session The session to configure the view for.
+     * @param isExpanded Whether the view is expanded or collapsed.
+     */
+    public void configureForForeignSession(ForeignSession session, boolean isExpanded) {
+        mDeviceIcon.setVisibility(View.VISIBLE);
+        mDeviceLabel.setText(session.name);
+        setTimeLabelVisibility(View.VISIBLE);
+        mTimeLabel.setText(getTimeString(session));
+        switch (session.deviceType) {
+            case ForeignSession.DEVICE_TYPE_PHONE:
+                mDeviceIcon.setImageResource(R.drawable.recent_phone);
+                break;
+            case ForeignSession.DEVICE_TYPE_TABLET:
+                mDeviceIcon.setImageResource(R.drawable.recent_tablet);
+                break;
+            default:
+                mDeviceIcon.setImageResource(R.drawable.recent_laptop);
+                break;
+        }
+        configureExpandedCollapsed(isExpanded);
+    }
+
+    /**
+     * Configures the view for the recently closed tabs group.
+     *
+     * @param isExpanded Whether the view is expanded or collapsed.
+     */
+    public void configureForRecentlyClosedTabs(boolean isExpanded) {
+        mDeviceIcon.setVisibility(View.VISIBLE);
+        mDeviceIcon.setImageResource(R.drawable.recent_recently_closed);
+        mDeviceLabel.setText(R.string.recently_closed);
+        setTimeLabelVisibility(View.GONE);
+        configureExpandedCollapsed(isExpanded);
+    }
+
+    /**
+     * Configures the view for the sync promo.
+     *
+     * @param isExpanded Whether the view is expanded or collapsed.
+     */
+    public void configureForSyncPromo(boolean isExpanded) {
+        mDeviceIcon.setVisibility(View.VISIBLE);
+        mDeviceIcon.setImageResource(R.drawable.recent_laptop);
+        mDeviceLabel.setText(R.string.ntp_recent_tabs_sync_promo_title);
+        setTimeLabelVisibility(View.GONE);
+        configureExpandedCollapsed(isExpanded);
+    }
+
+    private void configureExpandedCollapsed(boolean isExpanded) {
+        String description = getResources().getString(isExpanded
+                ? R.string.ntp_recent_tabs_accessibility_expanded_group
+                : R.string.ntp_recent_tabs_accessibility_collapsed_group);
+        mExpandCollapseIcon.setContentDescription(description);
+
+        int level = isExpanded ? DRAWABLE_LEVEL_EXPANDED : DRAWABLE_LEVEL_COLLAPSED;
+        mExpandCollapseIcon.getDrawable().setLevel(level);
+        mDeviceIcon.setActivated(isExpanded);
+
+        mDeviceLabel.setTextColor(isExpanded
+                ? mDeviceLabelExpandedColor
+                : mDeviceLabelCollapsedColor);
+        mTimeLabel.setTextColor(isExpanded ? mTimeLabelExpandedColor : mTimeLabelCollapsedColor);
+    }
+
+    private String getTimeString(ForeignSession session) {
+        long sessionModifiedTimeSeconds =
+                TimeUnit.SECONDS.convert(session.modifiedTime, TimeUnit.MILLISECONDS);
+        long timeDelta = mInitializationTimestamp - sessionModifiedTimeSeconds;
+        timeDelta = timeDelta > 0 ? timeDelta : 0;
+
+        long daysElapsed = timeDelta / (24L * 60L * 60L);
+        long hoursElapsed = timeDelta / (60L * 60L);
+        long minutesElapsed = timeDelta / 60L;
+
+        Resources resources = getContext().getResources();
+        if (daysElapsed > 0L) {
+            return resources.getString(R.string.ntp_recent_tabs_last_synced_days, daysElapsed);
+        } else if (hoursElapsed > 0L) {
+            return resources.getString(R.string.ntp_recent_tabs_last_synced_hours, hoursElapsed);
+        } else if (minutesElapsed > 0L) {
+            return resources.getString(
+                    R.string.ntp_recent_tabs_last_synced_minutes, minutesElapsed);
+        } else {
+            return resources.getString(R.string.ntp_recent_tabs_last_synced_just_now);
+        }
+    }
+
+    /**
+     * Shows or hides the time label (e.g. "Last synced: just now") and adjusts the positions of the
+     * icon and device label. In particular, the icon and device label are top-aligned when the time
+     * is visible, but are vertically centered when the time is gone.
+     */
+    private void setTimeLabelVisibility(int visibility) {
+        if (mTimeLabel.getVisibility() == visibility) return;
+        mTimeLabel.setVisibility(visibility);
+        if (visibility == View.GONE) {
+            replaceRule(mDeviceIcon, ALIGN_PARENT_TOP, CENTER_VERTICAL);
+            replaceRule(mDeviceLabel, ALIGN_PARENT_TOP, CENTER_VERTICAL);
+        } else {
+            replaceRule(mDeviceIcon, CENTER_VERTICAL, ALIGN_PARENT_TOP);
+            replaceRule(mDeviceLabel, CENTER_VERTICAL, ALIGN_PARENT_TOP);
+        }
+    }
+
+    private static void replaceRule(View view, int oldRule, int newRule) {
+        RelativeLayout.LayoutParams lp = ((RelativeLayout.LayoutParams) view.getLayoutParams());
+        lp.addRule(oldRule, 0);
+        lp.addRule(newRule);
+    }
+}