[Android] Add a base controller and subpage template for page info v2

Create PageInfoSubpageController and PageInfoSubpage for control
of a specific section of the page info v2. Componentized the cookies
section as an example.
https://screenshot.googleplex.com/XnhMwuBkVzG.png

Bug: 1077766
Change-Id: I7bf71c62859bcae7b2f24bd9509947c003a51c06
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2209070
Commit-Queue: Ehimare Okoyomon <eokoyomon@chromium.org>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Reviewed-by: Christian Dullweber <dullweber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772697}

components/page_info/android/BUILD.gn

@@ -54,6 +54,7 @@ android_resources("java_resources") {
     "java/res/layout/page_info.xml",
     "java/res/layout/page_info_permission_row.xml",
     "java/res/layout/page_info_row.xml",
+    "java/res/layout/page_info_subpage.xml",
     "java/res/layout/page_info_v2.xml",
     "java/res/values/colors.xml",
     "java/res/values/dimens.xml",
@@ -77,9 +78,12 @@ android_library("java") {
     "java/src/org/chromium/components/page_info/CookieControlsView.java",
     "java/src/org/chromium/components/page_info/PageInfoController.java",
     "java/src/org/chromium/components/page_info/PageInfoControllerDelegate.java",
+    "java/src/org/chromium/components/page_info/PageInfoCookiesController.java",
     "java/src/org/chromium/components/page_info/PageInfoDialog.java",
     "java/src/org/chromium/components/page_info/PageInfoFeatureList.java",
     "java/src/org/chromium/components/page_info/PageInfoRowView.java",
+    "java/src/org/chromium/components/page_info/PageInfoSubpage.java",
+    "java/src/org/chromium/components/page_info/PageInfoSubpageController.java",
     "java/src/org/chromium/components/page_info/PageInfoView.java",
     "java/src/org/chromium/components/page_info/PageInfoViewV2.java",
     "java/src/org/chromium/components/page_info/PermissionParamsListBuilder.java",

components/page_info/android/java/res/layout/page_info_subpage.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!--
+   Copyright 2020 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.
+-->
+<LinearLayout
+    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="match_parent"
+    android:paddingBottom="8dp"
+    android:orientation="vertical"
+    android:background="@color/sheet_bg_color">
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingBottom="12dp"
+        android:paddingEnd="@dimen/page_info_popup_padding_sides"
+        android:paddingStart="@dimen/page_info_popup_padding_sides" >
+
+        <view class="org.chromium.components.page_info.PageInfoView$ElidedUrlTextView"
+            android:id="@+id/subpage_url"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:ellipsize="end"
+            android:lineSpacingExtra="6dp"
+            android:paddingTop="16dp"
+            android:paddingBottom="16dp"
+            android:textAlignment="center"
+            android:textAppearance="@style/TextAppearance.TextLarge.Primary" />
+
+        <ImageView
+            android:id="@+id/subpage_back_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/subpage_url"
+            tools:ignore="ContentDescription"
+            android:layout_marginEnd="16dp"
+            android:layout_centerVertical="true"
+            android:layout_alignParentStart="true"
+            android:src="@drawable/ic_arrow_back_white_24dp"
+            app:tint="@color/default_icon_color" />
+
+        <TextView
+            android:id="@+id/subpage_title"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/subpage_url"
+            android:layout_toEndOf="@id/subpage_back_button"
+            android:gravity="center_vertical"
+            android:paddingBottom="12dp"
+            app:chromeDrawableTint="@color/default_icon_color"
+            android:textAppearance="@style/TextAppearance.TextLarge.Primary"/>
+
+    </RelativeLayout>
+
+    <!-- Programmatically add page specific inner view here -->
+    <FrameLayout
+        android:id="@+id/placeholder"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+</LinearLayout>

components/page_info/android/java/src/org/chromium/components/page_info/PageInfoController.java

@@ -17,7 +17,10 @@ import android.text.SpannableStringBuilder;
 import android.text.TextUtils;
 import android.text.style.ForegroundColorSpan;
 import android.text.style.TextAppearanceSpan;
+import android.view.View;
+import android.view.ViewGroup;
 import android.view.Window;
+import android.widget.FrameLayout;
 
 import androidx.annotation.IntDef;
 import androidx.annotation.VisibleForTesting;
@@ -90,6 +93,12 @@ public class PageInfoController implements ModalDialogProperties.Controller,
     // URL'.
     private String mFullUrl;
 
+    // The URL to be shown at the top of the page info views.
+    private SpannableStringBuilder mDisplayUrlBuilder;
+
+    // The length of the URL's origin in number of characters.
+    private int mUrlOriginLength;
+
     // Whether or not this page is an internal chrome page (e.g. the
     // chrome://settings page).
     private boolean mIsInternalPage;
@@ -120,6 +129,15 @@ public class PageInfoController implements ModalDialogProperties.Controller,
     // Delegate used by PermissionParamsListBuilder.
     private final PermissionParamsListBuilderDelegate mPermissionParamsListBuilderDelegate;
 
+    // The specific subpage being shown at any time, if any.
+    private PageInfoSubpage mSubpage;
+
+    // The current page info subpage controller, if any.
+    private PageInfoSubpageController mSubpageController;
+
+    // The controller for the cookies functionality of the page info.
+    private PageInfoCookiesController mCookiesController;
+
     /**
      * Creates the PageInfoController, but does not display it. Also initializes the corresponding
      * C++ object and saves a pointer to it.
@@ -179,27 +197,28 @@ public class PageInfoController implements ModalDialogProperties.Controller,
         if (mDelegate.isShowingOfflinePage()) {
             displayUrl = UrlUtilities.stripScheme(mFullUrl);
         }
-        SpannableStringBuilder displayUrlBuilder = new SpannableStringBuilder(displayUrl);
+        mDisplayUrlBuilder = new SpannableStringBuilder(displayUrl);
         AutocompleteSchemeClassifier autocompleteSchemeClassifier =
                 delegate.createAutocompleteSchemeClassifier();
         if (mSecurityLevel == ConnectionSecurityLevel.SECURE) {
             OmniboxUrlEmphasizer.EmphasizeComponentsResponse emphasizeResponse =
                     OmniboxUrlEmphasizer.parseForEmphasizeComponents(
-                            displayUrlBuilder.toString(), autocompleteSchemeClassifier);
+                            mDisplayUrlBuilder.toString(), autocompleteSchemeClassifier);
             if (emphasizeResponse.schemeLength > 0) {
-                displayUrlBuilder.setSpan(
+                mDisplayUrlBuilder.setSpan(
                         new TextAppearanceSpan(mContext, R.style.TextAppearance_RobotoMediumStyle),
                         0, emphasizeResponse.schemeLength, Spannable.SPAN_EXCLUSIVE_INCLUSIVE);
             }
         }
 
         boolean useDarkText = ColorUtils.useDarkColors(mContext);
-        OmniboxUrlEmphasizer.emphasizeUrl(displayUrlBuilder, mContext.getResources(),
+        OmniboxUrlEmphasizer.emphasizeUrl(mDisplayUrlBuilder, mContext.getResources(),
                 autocompleteSchemeClassifier, mSecurityLevel, mIsInternalPage, useDarkText,
                 /*emphasizeScheme=*/true);
-        viewParams.url = displayUrlBuilder;
-        viewParams.urlOriginLength = OmniboxUrlEmphasizer.getOriginEndIndex(
-                displayUrlBuilder.toString(), autocompleteSchemeClassifier);
+        viewParams.url = mDisplayUrlBuilder;
+        mUrlOriginLength = OmniboxUrlEmphasizer.getOriginEndIndex(
+                mDisplayUrlBuilder.toString(), autocompleteSchemeClassifier);
+        viewParams.urlOriginLength = mUrlOriginLength;
         autocompleteSchemeClassifier.destroy();
 
         if (mDelegate.isSiteSettingsAvailable()) {
@@ -247,11 +266,8 @@ public class PageInfoController implements ModalDialogProperties.Controller,
 
         mNativePageInfoController = PageInfoControllerJni.get().init(this, mWebContents);
         if (mIsV2Enabled) {
-            PageInfoRowView.ViewParams cookieControlsParams = new PageInfoRowView.ViewParams();
-            cookieControlsParams.visible = viewParams.cookieControlsShown;
-            cookieControlsParams.title =
-                    mView.getContext().getResources().getString(R.string.cookies_title);
-            ((PageInfoViewV2) mView).getCookiesRowView().setParams(cookieControlsParams);
+            mCookiesController =
+                    new PageInfoCookiesController(this, (PageInfoViewV2) mView, viewParams);
         } else {
             CookieControlsView.CookieControlsParams cookieControlsParams =
                     new CookieControlsView.CookieControlsParams();
@@ -526,9 +542,7 @@ public class PageInfoController implements ModalDialogProperties.Controller,
     @Override
     public void onBlockedCookiesCountChanged(int blockedCookies) {
         if (mIsV2Enabled) {
-            String subtitle = mContext.getResources().getQuantityString(
-                    R.plurals.cookie_controls_blocked_cookies, blockedCookies, blockedCookies);
-            ((PageInfoViewV2) mView).getCookiesRowView().updateSubtitle(subtitle);
+            mCookiesController.onBlockedCookiesCountChanged(blockedCookies);
         } else {
             mView.getCookieControlsView().setBlockedCookiesCount(blockedCookies);
         }
@@ -541,4 +555,54 @@ public class PageInfoController implements ModalDialogProperties.Controller,
         void recordPageInfoAction(
                 long nativePageInfoControllerAndroid, PageInfoController caller, int action);
     }
+
+    /**
+     * Launches a subpage with the specified params.
+     */
+    void launchSubpage(PageInfoSubpageController controller) {
+        mSubpageController = controller;
+        PageInfoSubpage.Params subpageParams = new PageInfoSubpage.Params();
+        subpageParams.url = mDisplayUrlBuilder;
+        subpageParams.urlOriginLength = mUrlOriginLength;
+        subpageParams.subpageTitle = mSubpageController.getSubpageTitle();
+        mSubpage = new PageInfoSubpage(mContext, subpageParams);
+        mSubpage.setBackButtonOnClickListener(view -> exitSubpage());
+        View subview = mSubpageController.createViewForSubpage(mSubpage);
+        if (subview != null) {
+            ((FrameLayout) mSubpage.findViewById(R.id.placeholder)).addView(subview);
+        }
+        replaceView(mView, mSubpage);
+    }
+
+    private ViewGroup getParent(View view) {
+        return (ViewGroup) view.getParent();
+    }
+
+    private void removeView(View view) {
+        ViewGroup parent = getParent(view);
+        if (parent != null) {
+            parent.removeView(view);
+        }
+    }
+
+    private void replaceView(View currentView, View newView) {
+        ViewGroup parent = getParent(currentView);
+        if (parent == null) {
+            return;
+        }
+        final int index = parent.indexOfChild(currentView);
+        removeView(currentView);
+        removeView(newView);
+        parent.addView(newView, index);
+    }
+
+    /**
+     * Switches back to the main page info view.
+     */
+    private void exitSubpage() {
+        mSubpageController.willRemoveSubpage();
+        replaceView(mSubpage, mView);
+        mSubpage = null;
+        mSubpageController = null;
+    }
 }

components/page_info/android/java/src/org/chromium/components/page_info/PageInfoCookiesController.java

+// Copyright 2020 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.components.page_info;
+
+import android.view.View;
+import android.view.ViewGroup;
+
+/**
+ * Class for controlling the page info cookies section.
+ */
+public class PageInfoCookiesController implements PageInfoSubpageController {
+    private PageInfoController mMainController;
+    private PageInfoViewV2 mView;
+    private String mTitle;
+
+    public PageInfoCookiesController(PageInfoController mainController, PageInfoViewV2 view,
+            PageInfoView.PageInfoViewParams setupParams) {
+        mMainController = mainController;
+        mView = view;
+        mTitle = mView.getContext().getResources().getString(R.string.cookies_title);
+        PageInfoRowView.ViewParams rowParams = new PageInfoRowView.ViewParams();
+        rowParams.visible = setupParams.cookieControlsShown;
+        rowParams.title = mTitle;
+        rowParams.clickCallback = this::launchSubpage;
+        mView.getCookiesRowView().setParams(rowParams);
+    }
+
+    private void launchSubpage() {
+        mMainController.launchSubpage(this);
+    }
+
+    @Override
+    public String getSubpageTitle() {
+        return mTitle;
+    }
+
+    @Override
+    public View createViewForSubpage(ViewGroup parent) {
+        // TODO(crbug.com/1077766): Create and set the cookie specific view.
+        return null;
+    }
+
+    @Override
+    public void willRemoveSubpage() {}
+
+    public void onBlockedCookiesCountChanged(int blockedCookies) {
+        String subtitle = mView.getContext().getResources().getQuantityString(
+                R.plurals.cookie_controls_blocked_cookies, blockedCookies, blockedCookies);
+        mView.getCookiesRowView().updateSubtitle(subtitle);
+    }
+}

components/page_info/android/java/src/org/chromium/components/page_info/PageInfoRowView.java

@@ -49,6 +49,7 @@ public class PageInfoRowView extends RelativeLayout implements OnClickListener {
         mTitle.setText(params.title);
         updateSubtitle(params.subtitle);
         mClickCallback = params.clickCallback;
+        setOnClickListener(this);
     }
 
     public void updateSubtitle(String subtitle) {

components/page_info/android/java/src/org/chromium/components/page_info/PageInfoSubpage.java

+// Copyright 2020 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.components.page_info;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+/**
+ * Represents a particular page info subpage.
+ */
+public class PageInfoSubpage extends FrameLayout {
+    /**  Parameters to configure the view of page info subpage. */
+    public static class Params {
+        // The URL to be shown at the top of the page.
+        public CharSequence url;
+        // The length of the URL's origin in number of characters.
+        public int urlOriginLength;
+        // The name of the subpage to be displayed.
+        public String subpageTitle;
+    }
+
+    private PageInfoView.ElidedUrlTextView mUrlTitle;
+    private ImageView mBackButton;
+    private TextView mSubpageTitle;
+
+    public PageInfoSubpage(Context context, Params params) {
+        super(context);
+        LayoutInflater.from(context).inflate(R.layout.page_info_subpage, this, true);
+        // Set the url title.
+        mUrlTitle = findViewById(R.id.subpage_url);
+        mUrlTitle.setUrl(params.url, params.urlOriginLength);
+        // Set the back button.
+        mBackButton = findViewById(R.id.subpage_back_button);
+        // Set the page title.
+        mSubpageTitle = findViewById(R.id.subpage_title);
+        mSubpageTitle.setText(params.subpageTitle);
+    }
+
+    public void setBackButtonOnClickListener(View.OnClickListener listener) {
+        mBackButton.setOnClickListener(listener);
+    }
+}

components/page_info/android/java/src/org/chromium/components/page_info/PageInfoSubpageController.java

+// Copyright 2020 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.components.page_info;
+
+import android.view.View;
+import android.view.ViewGroup;
+
+/**
+ * Interface for a page info subpage controller.
+ */
+public interface PageInfoSubpageController {
+    /**
+     * Returns a title string for the page info subpage.
+     */
+    String getSubpageTitle();
+
+    /**
+     * Returns a personalized subview to be used inside of the page info subpage.
+     */
+    View createViewForSubpage(ViewGroup parent);
+
+    /**
+     * Called before the subpage closes in order to perform any necessary cleanup.
+     */
+    void willRemoveSubpage();
+}