Java Code Examples for org.chromium.chrome.browser.tab.Tab#addObserver()

private void setTab(Tab tab) {
    if (tab != null) tab.loadIfNeeded();

    View newView = tab != null ? tab.getView() : null;
    if (mView == newView) return;

    // TODO(dtrainor): Look into changing this only if the views differ, but still parse the
    // ContentViewCore list even if they're the same.
    updateContentOverlayVisibility(false);

    if (mTabVisible != tab) {
        if (mTabVisible != null) mTabVisible.removeObserver(mTabObserver);
        if (tab != null) tab.addObserver(mTabObserver);
    }

    mTabVisible = tab;
    mView = newView;

    updateContentOverlayVisibility(mContentOverlayVisiblity);

    if (mTabVisible != null) initializeTab(mTabVisible);
}
 

void startObservingTab(Tab tab) {
    if (!tab.isOfflinePage()) return;

    mCurrentTab = tab;

    // If we are not observing the tab yet, let's.
    if (!isObservingTab(tab)) {
        // Adding a tab happens from inside of onPageLoadFinished, therefore if this is the time
        // we start observing the tab, the page inside of it is already loaded.
        mObservedTabs.put(tab.getId(), new TabState(true));
        tab.addObserver(this);
    }

    // If we are not observing network changes yet, let's.
    if (!isObservingNetworkChanges()) {
        startObservingNetworkChanges();
        mIsObservingNetworkChanges = true;
    }
}
 

private void setTab(Tab tab) {
    if (tab != null) tab.loadIfNeeded();

    View newView = tab != null ? tab.getView() : null;
    if (mView == newView) return;

    // TODO(dtrainor): Look into changing this only if the views differ, but still parse the
    // ContentViewCore list even if they're the same.
    updateContentOverlayVisibility(false);

    if (mTabVisible != tab) {
        if (mTabVisible != null) mTabVisible.removeObserver(mTabObserver);
        if (tab != null) tab.addObserver(mTabObserver);
    }

    mTabVisible = tab;
    mView = newView;

    updateContentOverlayVisibility(mContentOverlayVisiblity);

    if (mTabVisible != null) initializeTab(mTabVisible);
}
 

public InfoBarContainer(Context context, int tabId, TabContentViewParent parentView, Tab tab) {
    super(context, null);
    tab.addObserver(mTabObserver);

    // TODO(newt): move this workaround into the infobar views if/when they're scrollable.
    // Workaround for http://crbug.com/407149. See explanation in onMeasure() below.
    setVerticalScrollBarEnabled(false);

    FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(
            LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, Gravity.BOTTOM);
    int topMarginDp = DeviceFormFactor.isTablet(context)
            ? TOP_MARGIN_TABLET_DP : TOP_MARGIN_PHONE_DP;
    lp.topMargin = Math.round(topMarginDp * getResources().getDisplayMetrics().density);
    setLayoutParams(lp);

    mTabId = tabId;
    mParentView = parentView;

    mLayout = new InfoBarContainerLayout(context);
    addView(mLayout, new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT,
            LayoutParams.WRAP_CONTENT, Gravity.CENTER_HORIZONTAL));

    // Chromium's InfoBarContainer may add an InfoBar immediately during this initialization
    // call, so make sure everything in the InfoBarContainer is completely ready beforehand.
    mNativeInfoBarContainer = nativeInit();
}
 

private Tab createMainTab() {
    CustomTabsConnection customTabsConnection =
            CustomTabsConnection.getInstance(getApplication());
    String url = getUrlToLoad();
    // Get any referrer that has been explicitly set by the app.
    String referrerUrl = IntentHandler.getReferrerUrlIncludingExtraHeaders(getIntent(), this);
    if (referrerUrl == null) {
        Referrer referrer = customTabsConnection.getReferrerForSession(mSession);
        if (referrer != null) referrerUrl = referrer.getUrl();
    }
    Tab tab = new Tab(TabIdManager.getInstance().generateValidId(Tab.INVALID_TAB_ID),
            Tab.INVALID_TAB_ID, false, this, getWindowAndroid(),
            TabLaunchType.FROM_EXTERNAL_APP, null, null);
    tab.setAppAssociatedWith(customTabsConnection.getClientPackageNameForSession(mSession));

    mPrerenderedUrl = customTabsConnection.getPrerenderedUrl(mSession);
    WebContents webContents =
            customTabsConnection.takePrerenderedUrl(mSession, url, referrerUrl);
    mHasPrerendered = webContents != null;
    if (webContents == null) webContents = customTabsConnection.takeSpareWebContents();
    if (webContents == null) webContents = WebContentsFactory.createWebContents(false, false);
    tab.initialize(webContents, getTabContentManager(),
            new CustomTabDelegateFactory(mIntentDataProvider.shouldEnableUrlBarHiding()), false,
            false);
    tab.getTabRedirectHandler().updateIntent(getIntent());
    tab.getView().requestFocus();
    mTabObserver = new CustomTabObserver(getApplication(), mSession);
    tab.addObserver(mTabObserver);
    return tab;
}
 

@Override
public void didAddTab(Tab tab, TabModel.TabLaunchType type) {
    tab.addObserver(sTabRestoreTracker);

    Profile profile = mTabModelSelector.getModel(tab.isIncognito()).getProfile();
    OfflinePageBridge bridge = OfflinePageBridge.getForProfile(profile);
    if (bridge == null) return;
    bridge.registerRecentTab(tab.getId());
}
 

private ContextualSearchTabHelper(Tab tab) {
    mTab = tab;
    tab.addObserver(this);
    // Connect to a network, unless under test.
    if (NetworkChangeNotifier.isInitialized()) {
        NetworkChangeNotifier.addConnectionTypeObserver(this);
    }
}
 

private void initializeMainTab(Tab tab) {
    tab.getTabRedirectHandler().updateIntent(getIntent());
    tab.getView().requestFocus();
    mTabObserver = new CustomTabObserver(
            getApplication(), mSession, mIntentDataProvider.isOpenedByChrome());

    mMetricsObserver = new PageLoadMetricsObserver(
            CustomTabsConnection.getInstance(getApplication()), mSession, tab);
    tab.addObserver(mTabObserver);

    prepareTabBackground(tab);
}
 

/**
 * Sets the {@link Tab} this {@link View} will represent in the list.
 * @param tab     The {@link Tab} to represent.
 * @param canUndo Whether or not closing this {@link Tab} can be undone.
 */
public void setTab(Tab tab, boolean canUndo) {
    if (mTab != null) mTab.removeObserver(mTabObserver);
    mTab = tab;
    tab.addObserver(mTabObserver);
    mCanUndo = canUndo;
    updateTabTitle();
    updateFavicon();
}
 

/**
 * Sets the {@link Tab} this {@link View} will represent in the list.
 * @param tab     The {@link Tab} to represent.
 * @param canUndo Whether or not closing this {@link Tab} can be undone.
 */
public void setTab(Tab tab, boolean canUndo) {
    if (mTab != null) mTab.removeObserver(mTabObserver);
    mTab = tab;
    tab.addObserver(mTabObserver);
    mCanUndo = canUndo;
    updateTabTitle();
    updateFavicon();
}
 

private void initializeMainTab(Tab tab) {
    tab.getTabRedirectHandler().updateIntent(getIntent());
    tab.getView().requestFocus();
    mTabObserver = new CustomTabObserver(
            getApplication(), mSession, mIntentDataProvider.isOpenedByChrome());

    mMetricsObserver = new PageLoadMetricsObserver(
            CustomTabsConnection.getInstance(getApplication()), mSession, tab);
    tab.addObserver(mTabObserver);

    prepareTabBackground(tab);
}
 

private ContextualSearchTabHelper(Tab tab) {
    mTab = tab;
    tab.addObserver(this);
    // Connect to a network, unless under test.
    if (NetworkChangeNotifier.isInitialized()) {
        NetworkChangeNotifier.addConnectionTypeObserver(this);
    }
}
 

/**
 * Sets the {@link Tab} this {@link View} will represent in the list.
 * @param tab     The {@link Tab} to represent.
 * @param canUndo Whether or not closing this {@link Tab} can be undone.
 */
public void setTab(Tab tab, boolean canUndo) {
    if (mTab != null) mTab.removeObserver(mTabObserver);
    mTab = tab;
    tab.addObserver(mTabObserver);
    mCanUndo = canUndo;
    updateTabTitle();
    updateFavicon();
}
 

public void addObserver(Tab tab, TabObserver observer) {
    if (tab != null && observer != null) {
        tab.addObserver(observer);
    }
}
 

@Override
public void didAddTab(Tab tab, TabLaunchType type) {
    PageLoadMetrics.addObserver(mMetricsObserver);
    tab.addObserver(mTabObserver);
}
 

private ContextualSearchTabHelper(Tab tab) {
    mTab = tab;
    tab.addObserver(this);
}
 

@Override
public void didAddTab(Tab tab, TabLaunchType type) {
    tab.addObserver(mTabObserver);
}
 

/**
 * Records stats related to content suggestion visits, such as the time spent on the website, or
 * if the user comes back to the NTP.
 * @param tab Tab opened to load a content suggestion.
 * @param category The category of the content suggestion.
 */
public static void monitorContentSuggestionVisit(Tab tab, int category) {
    tab.addObserver(new SnippetVisitRecorder(category));
}
 

/**
 * Records stats related to content suggestion visits, such as the time spent on the website, or
 * if the user comes back to the NTP.
 * @param tab Tab opened to load a content suggestion.
 * @param category The category of the content suggestion.
 */
public static void monitorContentSuggestionVisit(Tab tab, int category) {
    tab.addObserver(new SnippetVisitRecorder(category));
}
 

/**
 * Records stats related to article visits, such as the time spent on the website, or if the
 * user comes back to the NTP.
 * @param tab Tab opened to load an article.
 */
public static void monitorVisit(Tab tab) {
    tab.addObserver(new SnippetVisitRecorder());
}