chrome/android/java/src/org/chromium/chrome/browser/NavigationPopup.java - chromium/src - Git at Google

 // Copyright 2013 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;

 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.support.annotation.IntDef;
 import android.support.annotation.Nullable;
 import android.support.annotation.VisibleForTesting;
 import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnLayoutChangeListener;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.BaseAdapter;
 import android.widget.ImageView;
 import android.widget.ListPopupWindow;
 import android.widget.PopupWindow;
 import android.widget.TextView;

 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.favicon.FaviconHelper;
 import org.chromium.chrome.browser.favicon.FaviconHelper.DefaultFaviconHelper;
 import org.chromium.chrome.browser.favicon.FaviconHelper.FaviconImageCallback;
 import org.chromium.chrome.browser.history.HistoryManagerUtils;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.content_public.browser.NavigationController;
 import org.chromium.content_public.browser.NavigationEntry;
 import org.chromium.content_public.browser.NavigationHistory;

 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.HashSet;
 import java.util.Set;

 /**
  * A popup that handles displaying the navigation history for a given tab.
  */
 public class NavigationPopup implements AdapterView.OnItemClickListener {
     private static final int MAXIMUM_HISTORY_ITEMS = 8;
     private static final int FULL_HISTORY_ENTRY_INDEX = -1;

     /** Specifies the type of navigation popup being shown */
     @IntDef({Type.ANDROID_SYSTEM_BACK, Type.TABLET_BACK, Type.TABLET_FORWARD})
     @Retention(RetentionPolicy.SOURCE)
     public @interface Type {
         int ANDROID_SYSTEM_BACK = 0;
         int TABLET_BACK = 1;
         int TABLET_FORWARD = 2;
     }

     private final Profile mProfile;
     private final Context mContext;
     private final ListPopupWindow mPopup;
     private final NavigationController mNavigationController;
     private NavigationHistory mHistory;
     private final NavigationAdapter mAdapter;
     private final @Type int mType;
     private final int mFaviconSize;
     @Nullable
     private final OnLayoutChangeListener mAnchorViewLayoutChangeListener;

     private DefaultFaviconHelper mDefaultFaviconHelper;

     /**
      * Loads the favicons asynchronously.
      */
     private FaviconHelper mFaviconHelper;
     private Runnable mOnDismissCallback;

     private boolean mInitialized;

     /**
      * Constructs a new popup with the given history information.
      *
      * @param profile The profile used for fetching favicons.
      * @param context The context used for building the popup.
      * @param navigationController The controller which takes care of page navigations.
      * @param type The type of navigation popup being triggered.
      */
     public NavigationPopup(Profile profile, Context context,
             NavigationController navigationController, @Type int type) {
         mProfile = profile;
         mContext = context;
         Resources resources = mContext.getResources();
         mNavigationController = navigationController;
         mType = type;

         boolean isForward = type == Type.TABLET_FORWARD;
         boolean anchorToBottom = type == Type.ANDROID_SYSTEM_BACK;

         mHistory = mNavigationController.getDirectedNavigationHistory(
                 isForward, MAXIMUM_HISTORY_ITEMS);
         mHistory.addEntry(new NavigationEntry(FULL_HISTORY_ENTRY_INDEX, UrlConstants.HISTORY_URL,
                 null, null, null, resources.getString(R.string.show_full_history), null, 0));

         mAdapter = new NavigationAdapter();

         mPopup = new ListPopupWindow(context, null, 0, R.style.NavigationPopupDialog);
         mPopup.setOnDismissListener(this::onDismiss);
         mPopup.setBackgroundDrawable(ApiCompatibilityUtils.getDrawable(
                 resources, anchorToBottom ? R.drawable.popup_bg_bottom : R.drawable.popup_bg));
         mPopup.setModal(true);
         mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
         mPopup.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
         mPopup.setOnItemClickListener(this);
         mPopup.setAdapter(mAdapter);
         mPopup.setWidth(resources.getDimensionPixelSize(
                 anchorToBottom ? R.dimen.navigation_popup_width : R.dimen.menu_width));

         if (anchorToBottom) {
             // By default ListPopupWindow uses the top & bottom padding of the background to
             // determine the vertical offset applied to the window.  This causes the popup to be
             // shifted up by the top padding, and thus we forcibly need to specify a vertical offset
             // of 0 to prevent that.
             mPopup.setVerticalOffset(0);
             mAnchorViewLayoutChangeListener = new OnLayoutChangeListener() {
                 @Override
                 public void onLayoutChange(View v, int left, int top, int right, int bottom,
                         int oldLeft, int oldTop, int oldRight, int oldBottom) {
                     centerPopupOverAnchorViewAndShow();
                 }
             };
         } else {
             mAnchorViewLayoutChangeListener = null;
         }

         mFaviconSize = resources.getDimensionPixelSize(R.dimen.default_favicon_size);
     }

     @VisibleForTesting
     ListPopupWindow getPopupForTesting() {
         return mPopup;
     }

     private String buildComputedAction(String action) {
         return (mType == Type.TABLET_FORWARD ? "ForwardMenu_" : "BackMenu_") + action;
     }

     /**
      * Shows the popup attached to the specified anchor view.
      */
     public void show(View anchorView) {
         if (!mInitialized) initialize();
         if (!mPopup.isShowing()) RecordUserAction.record(buildComputedAction("Popup"));
         if (mPopup.getAnchorView() != null && mAnchorViewLayoutChangeListener != null) {
             mPopup.getAnchorView().removeOnLayoutChangeListener(mAnchorViewLayoutChangeListener);
         }
         mPopup.setAnchorView(anchorView);
         if (mType == Type.ANDROID_SYSTEM_BACK) {
             anchorView.addOnLayoutChangeListener(mAnchorViewLayoutChangeListener);
             centerPopupOverAnchorViewAndShow();
         } else {
             mPopup.show();
         }
     }

     /**
      * Dismisses the popup.
      */
     public void dismiss() {
         mPopup.dismiss();
     }

     /**
      * Sets the callback to be notified when the popup has been dismissed.
      * @param onDismiss The callback to be notified.
      */
     public void setOnDismissCallback(Runnable onDismiss) {
         mOnDismissCallback = onDismiss;
     }

     private void centerPopupOverAnchorViewAndShow() {
         assert mInitialized;
         int horizontalOffset = (mPopup.getAnchorView().getWidth() - mPopup.getWidth()) / 2;
         if (horizontalOffset > 0) mPopup.setHorizontalOffset(horizontalOffset);
         mPopup.show();
     }

     private void onDismiss() {
         if (mInitialized) mFaviconHelper.destroy();
         mInitialized = false;
         if (mDefaultFaviconHelper != null) mDefaultFaviconHelper.clearCache();
         if (mAnchorViewLayoutChangeListener != null) {
             mPopup.getAnchorView().removeOnLayoutChangeListener(mAnchorViewLayoutChangeListener);
         }
         if (mOnDismissCallback != null) mOnDismissCallback.run();
     }

     private void initialize() {
         ThreadUtils.assertOnUiThread();
         mInitialized = true;
         mFaviconHelper = new FaviconHelper();

         Set<String> requestedUrls = new HashSet<String>();
         for (int i = 0; i < mHistory.getEntryCount(); i++) {
             NavigationEntry entry = mHistory.getEntryAtIndex(i);
             if (entry.getFavicon() != null) continue;
             final String pageUrl = entry.getUrl();
             if (!requestedUrls.contains(pageUrl)) {
                 FaviconImageCallback imageCallback =
                         (bitmap, iconUrl) -> NavigationPopup.this.onFaviconAvailable(pageUrl,
                                 bitmap);
                 mFaviconHelper.getLocalFaviconImageForURL(
                         mProfile, pageUrl, mFaviconSize, imageCallback);
                 requestedUrls.add(pageUrl);
             }
         }
     }

     /**
      * Called when favicon data requested by {@link #initialize()} is retrieved.
      * @param pageUrl the page for which the favicon was retrieved.
      * @param favicon the favicon data.
      */
     private void onFaviconAvailable(String pageUrl, Bitmap favicon) {
         if (favicon == null) {
             if (mDefaultFaviconHelper == null) mDefaultFaviconHelper = new DefaultFaviconHelper();
             favicon = mDefaultFaviconHelper.getDefaultFaviconBitmap(mContext, pageUrl, true);
         }
         for (int i = 0; i < mHistory.getEntryCount(); i++) {
             NavigationEntry entry = mHistory.getEntryAtIndex(i);
             if (TextUtils.equals(pageUrl, entry.getUrl())) entry.updateFavicon(favicon);
         }
         mAdapter.notifyDataSetChanged();
     }

     @Override
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
         NavigationEntry entry = (NavigationEntry) parent.getItemAtPosition(position);
         if (entry.getIndex() == FULL_HISTORY_ENTRY_INDEX) {
             RecordUserAction.record(buildComputedAction("ShowFullHistory"));
             assert mContext instanceof ChromeActivity;
             ChromeActivity activity = (ChromeActivity) mContext;
             HistoryManagerUtils.showHistoryManager(activity, activity.getActivityTab());
         } else {
             // 1-based index to keep in line with Desktop implementation.
             RecordUserAction.record(buildComputedAction("HistoryClick" + (position + 1)));
             mNavigationController.goToNavigationIndex(entry.getIndex());
         }

         mPopup.dismiss();
     }

     private class NavigationAdapter extends BaseAdapter {
         private Integer mTopPadding;

         @Override
         public int getCount() {
             return mHistory.getEntryCount();
         }

         @Override
         public Object getItem(int position) {
             return mHistory.getEntryAtIndex(position);
         }

         @Override
         public long getItemId(int position) {
             return ((NavigationEntry) getItem(position)).getIndex();
         }

         @Override
         public View getView(int position, View convertView, ViewGroup parent) {
             EntryViewHolder viewHolder;
             if (convertView == null) {
                 LayoutInflater inflater = LayoutInflater.from(parent.getContext());
                 convertView = inflater.inflate(R.layout.navigation_popup_item, parent, false);
                 viewHolder = new EntryViewHolder();
                 viewHolder.mContainer = convertView;
                 viewHolder.mImageView = convertView.findViewById(R.id.favicon_img);
                 viewHolder.mTextView = convertView.findViewById(R.id.entry_title);
                 convertView.setTag(viewHolder);
             } else {
                 viewHolder = (EntryViewHolder) convertView.getTag();
             }

             NavigationEntry entry = (NavigationEntry) getItem(position);
             setViewText(entry, viewHolder.mTextView);
             viewHolder.mImageView.setImageBitmap(entry.getFavicon());

             if (mType == Type.ANDROID_SYSTEM_BACK) {
                 View container = viewHolder.mContainer;
                 if (mTopPadding == null) {
                     mTopPadding = container.getResources().getDimensionPixelSize(
                             R.dimen.navigation_popup_top_padding);
                 }
                 viewHolder.mContainer.setPadding(container.getPaddingLeft(),
                         position == 0 ? mTopPadding : 0, container.getPaddingRight(),
                         container.getPaddingBottom());
             }

             return convertView;
         }

         private void setViewText(NavigationEntry entry, TextView view) {
             String entryText = entry.getTitle();
             if (TextUtils.isEmpty(entryText)) entryText = entry.getVirtualUrl();
             if (TextUtils.isEmpty(entryText)) entryText = entry.getUrl();

             view.setText(entryText);
         }
     }

     private static class EntryViewHolder {
         View mContainer;
         ImageView mImageView;
         TextView mTextView;
     }


 }
	// Copyright 2013 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;

	import android.content.Context;
	import android.content.res.Resources;
	import android.graphics.Bitmap;
	import android.support.annotation.IntDef;
	import android.support.annotation.Nullable;
	import android.support.annotation.VisibleForTesting;
	import android.text.TextUtils;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.View.OnLayoutChangeListener;
	import android.view.ViewGroup;
	import android.widget.AdapterView;
	import android.widget.BaseAdapter;
	import android.widget.ImageView;
	import android.widget.ListPopupWindow;
	import android.widget.PopupWindow;
	import android.widget.TextView;

	import org.chromium.base.ApiCompatibilityUtils;
	import org.chromium.base.ThreadUtils;
	import org.chromium.base.metrics.RecordUserAction;
	import org.chromium.chrome.R;
	import org.chromium.chrome.browser.favicon.FaviconHelper;
	import org.chromium.chrome.browser.favicon.FaviconHelper.DefaultFaviconHelper;
	import org.chromium.chrome.browser.favicon.FaviconHelper.FaviconImageCallback;
	import org.chromium.chrome.browser.history.HistoryManagerUtils;
	import org.chromium.chrome.browser.profiles.Profile;
	import org.chromium.content_public.browser.NavigationController;
	import org.chromium.content_public.browser.NavigationEntry;
	import org.chromium.content_public.browser.NavigationHistory;

	import java.lang.annotation.Retention;
	import java.lang.annotation.RetentionPolicy;
	import java.util.HashSet;
	import java.util.Set;

	/**
	* A popup that handles displaying the navigation history for a given tab.
	*/
	public class NavigationPopup implements AdapterView.OnItemClickListener {
	private static final int MAXIMUM_HISTORY_ITEMS = 8;
	private static final int FULL_HISTORY_ENTRY_INDEX = -1;

	/** Specifies the type of navigation popup being shown */
	@IntDef({Type.ANDROID_SYSTEM_BACK, Type.TABLET_BACK, Type.TABLET_FORWARD})
	@Retention(RetentionPolicy.SOURCE)
	public @interface Type {
	int ANDROID_SYSTEM_BACK = 0;
	int TABLET_BACK = 1;
	int TABLET_FORWARD = 2;
	}

	private final Profile mProfile;
	private final Context mContext;
	private final ListPopupWindow mPopup;
	private final NavigationController mNavigationController;
	private NavigationHistory mHistory;
	private final NavigationAdapter mAdapter;
	private final @Type int mType;
	private final int mFaviconSize;
	@Nullable
	private final OnLayoutChangeListener mAnchorViewLayoutChangeListener;

	private DefaultFaviconHelper mDefaultFaviconHelper;

	/**
	* Loads the favicons asynchronously.
	*/
	private FaviconHelper mFaviconHelper;
	private Runnable mOnDismissCallback;

	private boolean mInitialized;

	/**
	* Constructs a new popup with the given history information.
	*
	* @param profile The profile used for fetching favicons.
	* @param context The context used for building the popup.
	* @param navigationController The controller which takes care of page navigations.
	* @param type The type of navigation popup being triggered.
	*/
	public NavigationPopup(Profile profile, Context context,
	NavigationController navigationController, @Type int type) {
	mProfile = profile;
	mContext = context;
	Resources resources = mContext.getResources();
	mNavigationController = navigationController;
	mType = type;

	boolean isForward = type == Type.TABLET_FORWARD;
	boolean anchorToBottom = type == Type.ANDROID_SYSTEM_BACK;

	mHistory = mNavigationController.getDirectedNavigationHistory(
	isForward, MAXIMUM_HISTORY_ITEMS);
	mHistory.addEntry(new NavigationEntry(FULL_HISTORY_ENTRY_INDEX, UrlConstants.HISTORY_URL,
	null, null, null, resources.getString(R.string.show_full_history), null, 0));

	mAdapter = new NavigationAdapter();

	mPopup = new ListPopupWindow(context, null, 0, R.style.NavigationPopupDialog);
	mPopup.setOnDismissListener(this::onDismiss);
	mPopup.setBackgroundDrawable(ApiCompatibilityUtils.getDrawable(
	resources, anchorToBottom ? R.drawable.popup_bg_bottom : R.drawable.popup_bg));
	mPopup.setModal(true);
	mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
	mPopup.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
	mPopup.setOnItemClickListener(this);
	mPopup.setAdapter(mAdapter);
	mPopup.setWidth(resources.getDimensionPixelSize(
	anchorToBottom ? R.dimen.navigation_popup_width : R.dimen.menu_width));

	if (anchorToBottom) {
	// By default ListPopupWindow uses the top & bottom padding of the background to
	// determine the vertical offset applied to the window. This causes the popup to be
	// shifted up by the top padding, and thus we forcibly need to specify a vertical offset
	// of 0 to prevent that.
	mPopup.setVerticalOffset(0);
	mAnchorViewLayoutChangeListener = new OnLayoutChangeListener() {
	@Override
	public void onLayoutChange(View v, int left, int top, int right, int bottom,
	int oldLeft, int oldTop, int oldRight, int oldBottom) {
	centerPopupOverAnchorViewAndShow();
	}
	};
	} else {
	mAnchorViewLayoutChangeListener = null;
	}

	mFaviconSize = resources.getDimensionPixelSize(R.dimen.default_favicon_size);
	}

	@VisibleForTesting
	ListPopupWindow getPopupForTesting() {
	return mPopup;
	}

	private String buildComputedAction(String action) {
	return (mType == Type.TABLET_FORWARD ? "ForwardMenu_" : "BackMenu_") + action;
	}

	/**
	* Shows the popup attached to the specified anchor view.
	*/
	public void show(View anchorView) {
	if (!mInitialized) initialize();
	if (!mPopup.isShowing()) RecordUserAction.record(buildComputedAction("Popup"));
	if (mPopup.getAnchorView() != null && mAnchorViewLayoutChangeListener != null) {
	mPopup.getAnchorView().removeOnLayoutChangeListener(mAnchorViewLayoutChangeListener);
	}
	mPopup.setAnchorView(anchorView);
	if (mType == Type.ANDROID_SYSTEM_BACK) {
	anchorView.addOnLayoutChangeListener(mAnchorViewLayoutChangeListener);
	centerPopupOverAnchorViewAndShow();
	} else {
	mPopup.show();
	}
	}

	/**
	* Dismisses the popup.
	*/
	public void dismiss() {
	mPopup.dismiss();
	}

	/**
	* Sets the callback to be notified when the popup has been dismissed.
	* @param onDismiss The callback to be notified.
	*/
	public void setOnDismissCallback(Runnable onDismiss) {
	mOnDismissCallback = onDismiss;
	}

	private void centerPopupOverAnchorViewAndShow() {
	assert mInitialized;
	int horizontalOffset = (mPopup.getAnchorView().getWidth() - mPopup.getWidth()) / 2;
	if (horizontalOffset > 0) mPopup.setHorizontalOffset(horizontalOffset);
	mPopup.show();
	}

	private void onDismiss() {
	if (mInitialized) mFaviconHelper.destroy();
	mInitialized = false;
	if (mDefaultFaviconHelper != null) mDefaultFaviconHelper.clearCache();
	if (mAnchorViewLayoutChangeListener != null) {
	mPopup.getAnchorView().removeOnLayoutChangeListener(mAnchorViewLayoutChangeListener);
	}
	if (mOnDismissCallback != null) mOnDismissCallback.run();
	}

	private void initialize() {
	ThreadUtils.assertOnUiThread();
	mInitialized = true;
	mFaviconHelper = new FaviconHelper();

	Set<String> requestedUrls = new HashSet<String>();
	for (int i = 0; i < mHistory.getEntryCount(); i++) {
	NavigationEntry entry = mHistory.getEntryAtIndex(i);
	if (entry.getFavicon() != null) continue;
	final String pageUrl = entry.getUrl();
	if (!requestedUrls.contains(pageUrl)) {
	FaviconImageCallback imageCallback =
	(bitmap, iconUrl) -> NavigationPopup.this.onFaviconAvailable(pageUrl,
	bitmap);
	mFaviconHelper.getLocalFaviconImageForURL(
	mProfile, pageUrl, mFaviconSize, imageCallback);
	requestedUrls.add(pageUrl);
	}
	}
	}

	/**
	* Called when favicon data requested by {@link #initialize()} is retrieved.
	* @param pageUrl the page for which the favicon was retrieved.
	* @param favicon the favicon data.
	*/
	private void onFaviconAvailable(String pageUrl, Bitmap favicon) {
	if (favicon == null) {
	if (mDefaultFaviconHelper == null) mDefaultFaviconHelper = new DefaultFaviconHelper();
	favicon = mDefaultFaviconHelper.getDefaultFaviconBitmap(mContext, pageUrl, true);
	}
	for (int i = 0; i < mHistory.getEntryCount(); i++) {
	NavigationEntry entry = mHistory.getEntryAtIndex(i);
	if (TextUtils.equals(pageUrl, entry.getUrl())) entry.updateFavicon(favicon);
	}
	mAdapter.notifyDataSetChanged();
	}

	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
	NavigationEntry entry = (NavigationEntry) parent.getItemAtPosition(position);
	if (entry.getIndex() == FULL_HISTORY_ENTRY_INDEX) {
	RecordUserAction.record(buildComputedAction("ShowFullHistory"));
	assert mContext instanceof ChromeActivity;
	ChromeActivity activity = (ChromeActivity) mContext;
	HistoryManagerUtils.showHistoryManager(activity, activity.getActivityTab());
	} else {
	// 1-based index to keep in line with Desktop implementation.
	RecordUserAction.record(buildComputedAction("HistoryClick" + (position + 1)));
	mNavigationController.goToNavigationIndex(entry.getIndex());
	}

	mPopup.dismiss();
	}

	private class NavigationAdapter extends BaseAdapter {
	private Integer mTopPadding;

	@Override
	public int getCount() {
	return mHistory.getEntryCount();
	}

	@Override
	public Object getItem(int position) {
	return mHistory.getEntryAtIndex(position);
	}

	@Override
	public long getItemId(int position) {
	return ((NavigationEntry) getItem(position)).getIndex();
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
	EntryViewHolder viewHolder;
	if (convertView == null) {
	LayoutInflater inflater = LayoutInflater.from(parent.getContext());
	convertView = inflater.inflate(R.layout.navigation_popup_item, parent, false);
	viewHolder = new EntryViewHolder();
	viewHolder.mContainer = convertView;
	viewHolder.mImageView = convertView.findViewById(R.id.favicon_img);
	viewHolder.mTextView = convertView.findViewById(R.id.entry_title);
	convertView.setTag(viewHolder);
	} else {
	viewHolder = (EntryViewHolder) convertView.getTag();
	}

	NavigationEntry entry = (NavigationEntry) getItem(position);
	setViewText(entry, viewHolder.mTextView);
	viewHolder.mImageView.setImageBitmap(entry.getFavicon());

	if (mType == Type.ANDROID_SYSTEM_BACK) {
	View container = viewHolder.mContainer;
	if (mTopPadding == null) {
	mTopPadding = container.getResources().getDimensionPixelSize(
	R.dimen.navigation_popup_top_padding);
	}
	viewHolder.mContainer.setPadding(container.getPaddingLeft(),
	position == 0 ? mTopPadding : 0, container.getPaddingRight(),
	container.getPaddingBottom());
	}

	return convertView;
	}

	private void setViewText(NavigationEntry entry, TextView view) {
	String entryText = entry.getTitle();
	if (TextUtils.isEmpty(entryText)) entryText = entry.getVirtualUrl();
	if (TextUtils.isEmpty(entryText)) entryText = entry.getUrl();

	view.setText(entryText);
	}
	}

	private static class EntryViewHolder {
	View mContainer;
	ImageView mImageView;
	TextView mTextView;
	}


	}