Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/ntp/NativePageFactory.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.app.Activity;
+import android.net.Uri;
+
+import org.chromium.base.VisibleForTesting;
+import org.chromium.chrome.browser.NativePage;
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.browser.enhancedbookmarks.EnhancedBookmarkPage;
+import org.chromium.chrome.browser.enhancedbookmarks.EnhancedBookmarkUtils;
+import org.chromium.chrome.browser.tabmodel.TabModelSelector;
+import org.chromium.chrome.browser.util.FeatureUtilities;
+import org.chromium.ui.base.DeviceFormFactor;
+
+/**
+ * Creates NativePage objects to show chrome-native:// URLs using the native Android view system.
+ */
+public class NativePageFactory {
+
+    public static final String CHROME_NATIVE_SCHEME = "chrome-native";
+
+    private static NativePageBuilder sNativePageBuilder = new NativePageBuilder();
+
+    @VisibleForTesting
+    static class NativePageBuilder {
+        protected NativePage buildNewTabPage(Activity activity, Tab tab,
+                TabModelSelector tabModelSelector) {
+            if (tab.isIncognito()) {
+                return new IncognitoNewTabPage(activity, tab);
+            } else if (FeatureUtilities.isDocumentMode(activity)) {
+                return new DocumentNewTabPage(activity, tab, tabModelSelector);
+            } else {
+                return new NewTabPage(activity, tab, tabModelSelector);
+            }
+        }
+
+        protected NativePage buildBookmarksPage(Activity activity, Tab tab,
+                TabModelSelector tabModelSelector) {
+            if (EnhancedBookmarkUtils.isEnhancedBookmarkEnabled(
+                    tab.getProfile().getOriginalProfile()) && DeviceFormFactor.isTablet(activity)) {
+                return EnhancedBookmarkPage.buildPage(activity, tab);
+            } else {
+                return BookmarksPage.buildPage(activity, tab, tabModelSelector);
+            }
+        }
+
+        protected NativePage buildRecentTabsPage(Activity activity, Tab tab) {
+            RecentTabsManager recentTabsManager = FeatureUtilities.isDocumentMode(activity)
+                    ? new DocumentRecentTabsManager(tab, activity, false)
+                    : new RecentTabsManager(tab, tab.getProfile(), activity);
+            return new RecentTabsPage(activity, recentTabsManager);
+        }
+    }
+
+    enum NativePageType {
+        NONE, CANDIDATE, NTP, BOOKMARKS, RECENT_TABS
+    }
+
+    private static NativePageType nativePageType(String url, NativePage candidatePage,
+            boolean isIncognito) {
+        if (url == null) return NativePageType.NONE;
+
+        Uri uri = Uri.parse(url);
+        if (!CHROME_NATIVE_SCHEME.equals(uri.getScheme())) {
+            return NativePageType.NONE;
+        }
+
+        String host = uri.getHost();
+        if (candidatePage != null && candidatePage.getHost().equals(host)) {
+            return NativePageType.CANDIDATE;
+        }
+
+        if (UrlConstants.NTP_HOST.equals(host)) {
+            return NativePageType.NTP;
+        } else if (UrlConstants.BOOKMARKS_HOST.equals(host)) {
+            return NativePageType.BOOKMARKS;
+        } else if (UrlConstants.RECENT_TABS_HOST.equals(host) && !isIncognito) {
+            return NativePageType.RECENT_TABS;
+        } else {
+            return NativePageType.NONE;
+        }
+    }
+
+    /**
+     * Returns a NativePage for displaying the given URL if the URL is a valid chrome-native URL,
+     * or null otherwise. If candidatePage is non-null and corresponds to the URL, it will be
+     * returned. Otherwise, a new NativePage will be constructed.
+     *
+     * @param url The URL to be handled.
+     * @param candidatePage A NativePage to be reused if it matches the url, or null.
+     * @param tab The Tab that will show the page.
+     * @param tabModelSelector The TabModelSelector containing the tab.
+     * @param activity The activity used to create the views for the page.
+     * @return A NativePage showing the specified url or null.
+     */
+    public static NativePage createNativePageForURL(String url, NativePage candidatePage,
+            Tab tab, TabModelSelector tabModelSelector, Activity activity) {
+        return createNativePageForURL(url, candidatePage, tab, tabModelSelector, activity,
+                tab.isIncognito());
+    }
+
+    @VisibleForTesting
+    static NativePage createNativePageForURL(String url, NativePage candidatePage,
+            Tab tab, TabModelSelector tabModelSelector, Activity activity,
+            boolean isIncognito) {
+        NativePage page;
+
+        switch (nativePageType(url, candidatePage, isIncognito)) {
+            case NONE:
+                return null;
+            case CANDIDATE:
+                page = candidatePage;
+                break;
+            case NTP:
+                page = sNativePageBuilder.buildNewTabPage(activity, tab, tabModelSelector);
+                break;
+            case BOOKMARKS:
+                page = sNativePageBuilder.buildBookmarksPage(activity, tab, tabModelSelector);
+                if (page == null) return null;  // Enhanced Bookmarks page is not shown on phone
+                break;
+            case RECENT_TABS:
+                page = sNativePageBuilder.buildRecentTabsPage(activity, tab);
+                break;
+            default:
+                assert false;
+                return null;
+        }
+        page.updateForUrl(url);
+        return page;
+    }
+
+    /**
+     * Returns whether the URL would navigate to a native page.
+     *
+     * @param url The URL to be checked.
+     * @param isIncognito Whether the page will be displayed in incognito mode.
+     * @return Whether the host and the scheme of the passed in URL matches one of the supported
+     *         native pages.
+     */
+    public static boolean isNativePageUrl(String url, boolean isIncognito) {
+        return nativePageType(url, null, isIncognito) != NativePageType.NONE;
+    }
+
+    @VisibleForTesting
+    static void setNativePageBuilderForTesting(NativePageBuilder builder) {
+        sNativePageBuilder = builder;
+    }
+}