Merge java_staging/src into java/src.

chrome/android/java_staging/src/org/chromium/chrome/browser/dom_distiller/ReaderModeManager.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/dom_distiller/ReaderModeManager.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/dom_distiller/ReaderModeManager.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/dom_distiller/ReaderModeManager.java
deleted file mode 100644
index ee038ef90f1e4ad3a0bdb79b1de00c1d139d37b9..0000000000000000000000000000000000000000
--- a/chrome/android/java_staging/src/org/chromium/chrome/browser/dom_distiller/ReaderModeManager.java
+++ /dev/null
@@ -1,353 +0,0 @@
-// 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.dom_distiller;
-
-import android.app.Activity;
-import android.content.Context;
-import android.text.TextUtils;
-
-import org.chromium.base.CommandLine;
-import org.chromium.base.ObserverList;
-import org.chromium.base.metrics.RecordHistogram;
-import org.chromium.chrome.R;
-import org.chromium.chrome.browser.ChromeActivity;
-import org.chromium.chrome.browser.ChromeSwitches;
-import org.chromium.chrome.browser.ChromeVersionInfo;
-import org.chromium.chrome.browser.EmptyTabObserver;
-import org.chromium.chrome.browser.Tab;
-import org.chromium.chrome.browser.contextualsearch.ContextualSearchManager;
-import org.chromium.chrome.browser.contextualsearch.ContextualSearchObserver;
-import org.chromium.chrome.browser.dom_distiller.ReaderModePanel.ReaderModePanelHost;
-import org.chromium.chrome.browser.gsa.GSAContextDisplaySelection;
-import org.chromium.chrome.browser.infobar.InfoBar;
-import org.chromium.chrome.browser.infobar.InfoBarContainer;
-import org.chromium.chrome.browser.infobar.InfoBarContainer.InfoBarContainerObserver;
-import org.chromium.chrome.browser.tab.ChromeTab;
-import org.chromium.components.dom_distiller.content.DistillablePageUtils;
-import org.chromium.components.dom_distiller.core.DomDistillerUrlUtils;
-import org.chromium.content_public.browser.WebContents;
-import org.chromium.content_public.browser.WebContentsObserver;
-import org.chromium.ui.base.DeviceFormFactor;
-
-/**
- * Manages UI effects for reader mode including hiding and showing the
- * reader mode and reader mode preferences toolbar icon and hiding the
- * top controls when a reader mode page has finished loading.
- */
-public class ReaderModeManager extends EmptyTabObserver
-        implements ContextualSearchObserver, InfoBarContainerObserver, ReaderModePanelHost {
-
-    /**
-     * Observer for changes to the current status of reader mode.
-     */
-    public static interface ReaderModeManagerObserver {
-        /**
-         * Triggered on changes to the reader mode status for the owning tab.
-         *
-         * @param readerModeStatus The current status of reader mode.
-         * @see ReaderModeManager#POSSIBLE
-         * @see ReaderModeManager#NOT_POSSIBLE
-         * @see ReaderModeManager#STARTED
-         */
-        void onReaderModeStatusChanged(int readerModeStatus);
-    }
-
-    /**
-     * POSSIBLE means reader mode can be entered.
-     */
-    public static final int POSSIBLE = 0;
-    /**
-     * NOT_POSSIBLE means reader mode cannot be entered.
-     */
-    public static final int NOT_POSSIBLE = 1;
-    /**
-     * STARTED means reader mode is currently in reader mode.
-     */
-    public static final int STARTED = 2;
-
-    /**
-     * JavaScript that can be executed to tell whether or not a page can be viewed in reader mode.
-     */
-    private static final String sIsReadableJs = DomDistillerUrlUtils.getIsDistillableJs();
-
-    /**
-     * The url of the last page visited if the last page was reader mode page.  Otherwise null.
-     */
-    private String mReaderModePageUrl;
-
-    /**
-     * Whether the page is an article or not.
-     */
-    private int mReaderModeStatus = NOT_POSSIBLE;
-
-    /**
-     * Whether the fact that the current web page was distillable or not has been recorded.
-     */
-    private boolean mIsUmaRecorded;
-
-    private WebContentsObserver mWebContentsObserver;
-
-    private final Tab mTab;
-
-    private final ReaderModePanel mReaderModePanel;
-
-    private final ObserverList<ReaderModeManagerObserver> mObservers;
-
-    private final int mHeaderBackgroundColor;
-
-    public ReaderModeManager(Tab tab, Context context) {
-        mTab = tab;
-        mTab.addObserver(this);
-        mObservers = new ObserverList<ReaderModeManagerObserver>();
-        mReaderModePanel = isEnabled(context) ? new ReaderModePanel(this) : null;
-        mHeaderBackgroundColor = context != null
-                ? context.getResources().getColor(R.color.reader_mode_header_bg) : 0;
-    }
-
-    /**
-     * Adds an observer to be notified about changes to the reader mode status.
-     */
-    public void addObserver(ReaderModeManagerObserver observer) {
-        mObservers.addObserver(observer);
-    }
-
-    /**
-     * Removes an observer from receiving updates about the reader mode status changes.
-     */
-    public void removeObserver(ReaderModeManagerObserver observer) {
-        mObservers.removeObserver(observer);
-    }
-
-    // EmptyTabObserver:
-    @Override
-    public void onDestroyed(Tab tab) {
-        ContextualSearchManager contextualSearchManager = getContextualSearchManager(tab);
-        if (contextualSearchManager != null) contextualSearchManager.removeObserver(this);
-
-        if (mTab.getInfoBarContainer() != null) mTab.getInfoBarContainer().removeObserver(this);
-
-        if (mReaderModePanel != null) mReaderModePanel.onDestroy();
-
-        if (mWebContentsObserver != null) {
-            mWebContentsObserver.destroy();
-            mWebContentsObserver = null;
-        }
-
-        destroyReaderModeControl();
-    }
-
-    @Override
-    public void onContentChanged(Tab tab) {
-        if (mWebContentsObserver != null) {
-            mWebContentsObserver.destroy();
-            mWebContentsObserver = null;
-        }
-        if (tab.getWebContents() != null) {
-            mWebContentsObserver = createWebContentsObserver(tab.getWebContents());
-            if (DomDistillerUrlUtils.isDistilledPage(tab.getUrl())) {
-                mReaderModeStatus = STARTED;
-                mReaderModePageUrl = tab.getUrl();
-                sendReaderModeStatusChangedNotification();
-            }
-        }
-        ContextualSearchManager contextualSearchManager = getContextualSearchManager(tab);
-        if (contextualSearchManager != null) contextualSearchManager.addObserver(this);
-
-        if (tab.getInfoBarContainer() != null) tab.getInfoBarContainer().addObserver(this);
-    }
-
-    @Override
-    public void onToggleFullscreenMode(Tab tab, boolean enable) {
-        if (mReaderModePanel == null) return;
-
-        if (enable) {
-            mReaderModePanel.onEnterFullscreen();
-        } else {
-            mReaderModePanel.onExitFullscreen();
-        }
-    }
-
-    // ContextualSearchObserver:
-    @Override
-    public void onShowContextualSearch(GSAContextDisplaySelection selectionContext) {
-        if (mReaderModePanel != null) mReaderModePanel.hideButtonBar();
-    }
-
-    @Override
-    public void onHideContextualSearch() {
-        if (mReaderModePanel != null) mReaderModePanel.unhideButtonBar();
-    }
-
-    // InfoBarContainerObserver:
-    @Override
-    public void onAddInfoBar(InfoBarContainer container, InfoBar infoBar, boolean isFirst) {
-        if (isFirst && mReaderModePanel != null) mReaderModePanel.onShowInfobarContainer();
-    }
-
-    @Override
-    public void onRemoveInfoBar(InfoBarContainer container, InfoBar infoBar, boolean isLast) {
-        if (isLast && mReaderModePanel != null) mReaderModePanel.onHideInfobarContainer();
-    }
-
-    // ReaderModePanelHost:
-
-    // TODO(aruslan): use the one in ChromeSwitches once it's rolled.
-    private static final String ENABLE_READER_MODE_BUTTON_ANIMATION =
-            "enable-dom-distiller-button-animation";
-
-    @Override
-    public boolean allowReaderModeButtonAnimation() {
-        return CommandLine.getInstance().hasSwitch(
-                ENABLE_READER_MODE_BUTTON_ANIMATION);
-    }
-
-    @Override
-    public int getReaderModeHeaderBackgroundColor() {
-        return mHeaderBackgroundColor;
-    }
-
-    @Override
-    public int getReaderModeStatus() {
-        return mReaderModeStatus;
-    }
-
-    @Override
-    public Tab getTab() {
-        return mTab;
-    }
-
-    @Override
-    public boolean isInsideDismissButton(float x, float y) {
-        ReaderModeActivityDelegate delegate = getReaderModeActivityDelegate();
-        if (delegate == null) return false;
-        return delegate.getReaderModeControl().isInsideDismissButton(x, y);
-    }
-
-    @Override
-    public void createReaderModeControl() {
-        ReaderModeActivityDelegate delegate = getReaderModeActivityDelegate();
-        if (delegate != null) delegate.getReaderModeControl();
-    }
-
-    @Override
-    public void destroyReaderModeControl() {
-        ReaderModeActivityDelegate delegate = getReaderModeActivityDelegate();
-        if (delegate != null) delegate.destroyReaderModeControl();
-    }
-
-    /**
-     * @return The panel associated with the managed tab.
-     */
-    public ReaderModePanel getReaderModePanel() {
-        return mReaderModePanel;
-    }
-
-    private ReaderModeActivityDelegate getReaderModeActivityDelegate() {
-        if (!(mTab instanceof ChromeTab)) return null;
-        return ((ChromeTab) mTab).getReaderModeActivityDelegate();
-    }
-
-    private WebContentsObserver createWebContentsObserver(WebContents webContents) {
-        return new WebContentsObserver(webContents) {
-            @Override
-            public void didFinishLoad(long frameId, String validatedUrl, boolean isMainFrame) {
-                if (!isMainFrame) return;
-                if (DomDistillerUrlUtils.isDistilledPage(mTab.getUrl())) return;
-                updateStatusBasedOnReaderModeCriteria(true);
-            }
-
-            @Override
-            public void didStartProvisionalLoadForFrame(long frameId, long parentFrameId,
-                    boolean isMainFrame, String validatedUrl, boolean isErrorPage,
-                    boolean isIframeSrcdoc) {
-                if (!isMainFrame) return;
-                if (DomDistillerUrlUtils.isDistilledPage(validatedUrl)) {
-                    mReaderModeStatus = STARTED;
-                    sendReaderModeStatusChangedNotification();
-                    mReaderModePageUrl = validatedUrl;
-                }
-            }
-
-            @Override
-            public void didNavigateMainFrame(String url, String baseUrl,
-                    boolean isNavigationToDifferentPage, boolean isNavigationInPage,
-                    int statusCode) {
-                // TODO(cjhopman): This should possibly ignore navigations that replace the entry
-                // (like those from history.replaceState()).
-                if (isNavigationInPage) return;
-                if (DomDistillerUrlUtils.isDistilledPage(url)) return;
-
-                mReaderModeStatus = POSSIBLE;
-                if (!TextUtils.equals(url,
-                        DomDistillerUrlUtils.getOriginalUrlFromDistillerUrl(
-                                mReaderModePageUrl))) {
-                    mReaderModeStatus = NOT_POSSIBLE;
-                    mIsUmaRecorded = false;
-                    updateStatusBasedOnReaderModeCriteria(false);
-                }
-                mReaderModePageUrl = null;
-                sendReaderModeStatusChangedNotification();
-            }
-        };
-    }
-
-    // Updates reader mode status based on whether or not the page should be viewed in reader mode.
-    private void updateStatusBasedOnReaderModeCriteria(final boolean forceRecord) {
-        if (mTab.getWebContents() == null) return;
-        if (mTab.getContentViewCore() == null) return;
-
-        DistillablePageUtils.isPageDistillable(mTab.getWebContents(),
-                mTab.getContentViewCore().getIsMobileOptimizedHint(),
-                new DistillablePageUtils.PageDistillableCallback() {
-                    @Override
-                    public void onIsPageDistillableResult(boolean isDistillable) {
-                        if (isDistillable) {
-                            mReaderModeStatus = POSSIBLE;
-                        } else {
-                            mReaderModeStatus = NOT_POSSIBLE;
-                        }
-                        if (!mIsUmaRecorded && (mReaderModeStatus == POSSIBLE || forceRecord)) {
-                            mIsUmaRecorded = true;
-                            RecordHistogram.recordBooleanHistogram(
-                                    "DomDistiller.PageDistillable", mReaderModeStatus == POSSIBLE);
-                        }
-                        sendReaderModeStatusChangedNotification();
-                    }
-                });
-    }
-
-    private void sendReaderModeStatusChangedNotification() {
-        for (ReaderModeManagerObserver observer : mObservers) {
-            observer.onReaderModeStatusChanged(mReaderModeStatus);
-        }
-        if (mReaderModePanel != null) mReaderModePanel.updateBottomButtonBar();
-    }
-
-    private ContextualSearchManager getContextualSearchManager(Tab tab) {
-        if (tab == null || tab.getWindowAndroid() == null) return null;
-        Activity activity = tab.getWindowAndroid().getActivity().get();
-        if (!(activity instanceof ChromeActivity)) return null;
-        return ((ChromeActivity) activity).getContextualSearchManager();
-    }
-
-    /**
-     * @return Whether Reader mode and its new UI are enabled.
-     * @param context A context
-     */
-    public static boolean isEnabled(Context context) {
-        if (context == null) return false;
-
-        boolean enabled = CommandLine.getInstance().hasSwitch(ChromeSwitches.ENABLE_DOM_DISTILLER)
-                && !CommandLine.getInstance().hasSwitch(
-                        ChromeSwitches.DISABLE_READER_MODE_BOTTOM_BAR)
-                && !DeviceFormFactor.isTablet(context);
-        if (ChromeVersionInfo.isBetaBuild() || ChromeVersionInfo.isStableBuild()) {
-            enabled = enabled
-                    && CommandLine.getInstance().hasSwitch(
-                               ChromeSwitches.ENABLE_READER_MODE_BUTTON);
-        }
-        return enabled;
-    }
-}