content: /*
   * Copyright (C) 2007 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.webkit;
  
  import android.annotation.IntDef;
  import android.annotation.Nullable;
  import android.annotation.SystemApi;
  import android.annotation.UnsupportedAppUsage;
  import android.content.Context;
  
  import java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  /**
   * Manages settings state for a WebView. When a WebView is first created, it
   * obtains a set of default settings. These default settings will be returned
   * from any getter call. A {@code WebSettings} object obtained from
   * {@link WebView#getSettings()} is tied to the life of the WebView. If a WebView has
   * been destroyed, any method call on {@code WebSettings} will throw an
   * {@link IllegalStateException}.
   */
  // This is an abstract base class: concrete WebViewProviders must
  // create a class derived from this, and return an instance of it in the
  // WebViewProvider.getWebSettingsProvider() method implementation.
  public abstract class WebSettings {
      /**
       * Enum for controlling the layout of html.
       * <ul>
       *   <li>{@code NORMAL} means no rendering changes. This is the recommended choice for maximum
       *       compatibility across different platforms and Android versions.</li>
       *   <li>{@code SINGLE_COLUMN} moves all content into one column that is the width of the
       *       view.</li>
       *   <li>{@code NARROW_COLUMNS} makes all columns no wider than the screen if possible. Only use
       *       this for API levels prior to {@link android.os.Build.VERSION_CODES#KITKAT}.</li>
       *   <li>{@code TEXT_AUTOSIZING} boosts font size of paragraphs based on heuristics to make
       *       the text readable when viewing a wide-viewport layout in the overview mode.
       *       It is recommended to enable zoom support {@link #setSupportZoom} when
       *       using this mode. Supported from API level
       *       {@link android.os.Build.VERSION_CODES#KITKAT}</li>
       * </ul>
       */
      // XXX: These must match LayoutAlgorithm in Settings.h in WebCore.
      public enum LayoutAlgorithm {
          NORMAL,
          /**
           * @deprecated This algorithm is now obsolete.
           */
          @Deprecated
          SINGLE_COLUMN,
          /**
           * @deprecated This algorithm is now obsolete.
           */
          @Deprecated
          NARROW_COLUMNS,
          TEXT_AUTOSIZING
      }
  
      /**
       * Enum for specifying the text size.
       * <ul>
       *   <li>SMALLEST is 50%</li>
       *   <li>SMALLER is 75%</li>
       *   <li>NORMAL is 100%</li>
       *   <li>LARGER is 150%</li>
       *   <li>LARGEST is 200%</li>
       * </ul>
       *
       * @deprecated Use {@link WebSettings#setTextZoom(int)} and {@link WebSettings#getTextZoom()} instead.
       */
      @Deprecated
      public enum TextSize {
          SMALLEST(50),
          SMALLER(75),
          NORMAL(100),
          LARGER(150),
          LARGEST(200);
          TextSize(int size) {
              value = size;
          }
          @UnsupportedAppUsage
          int value;
      }
  
      /**
       * Enum for specifying the WebView's desired density.
       * <ul>
       *   <li>{@code FAR} makes 100% looking like in 240dpi</li>
       *   <li>{@code MEDIUM} makes 100% looking like in 160dpi</li>
       *   <li>{@code CLOSE} makes 100% looking like in 120dpi</li>
       * </ul>
       */
      public enum ZoomDensity {
          FAR(150),      // 240dpi
          MEDIUM(100),    // 160dpi
          CLOSE(75);     // 120dpi
          ZoomDensity(int size) {
              value = size;
          }
  
          /**
           * @hide Only for use by WebViewProvider implementations
           */
          public int getValue() {
              return value;
          }
  
          int value;
      }
  
      /** @hide */
      @IntDef(prefix = { "LOAD_" }, value = {
              LOAD_DEFAULT,
              LOAD_NORMAL,
              LOAD_CACHE_ELSE_NETWORK,
              LOAD_NO_CACHE,
              LOAD_CACHE_ONLY
      })
      @Retention(RetentionPolicy.SOURCE)
      public @interface CacheMode {}
  
      /**
       * Default cache usage mode. If the navigation type doesn't impose any
       * specific behavior, use cached resources when they are available
       * and not expired, otherwise load resources from the network.
       * Use with {@link #setCacheMode}.
       */
      public static final int LOAD_DEFAULT = -1;
  
      /**
       * Normal cache usage mode. Use with {@link #setCacheMode}.
       *
       * @deprecated This value is obsolete, as from API level
       * {@link android.os.Build.VERSION_CODES#HONEYCOMB} and onwards it has the
       * same effect as {@link #LOAD_DEFAULT}.
       */
      @Deprecated
      public static final int LOAD_NORMAL = 0;
  
      /**
       * Use cached resources when they are available, even if they have expired.
       * Otherwise load resources from the network.
       * Use with {@link #setCacheMode}.
       */
      public static final int LOAD_CACHE_ELSE_NETWORK = 1;
  
      /**
       * Don't use the cache, load from the network.
       * Use with {@link #setCacheMode}.
       */
      public static final int LOAD_NO_CACHE = 2;
  
      /**
       * Don't use the network, load from the cache.
       * Use with {@link #setCacheMode}.
       */
      public static final int LOAD_CACHE_ONLY = 3;
  
      public enum RenderPriority {
          NORMAL,
          HIGH,
          LOW
      }
  
      /**
       * The plugin state effects how plugins are treated on a page. ON means
       * that any object will be loaded even if a plugin does not exist to handle
       * the content. ON_DEMAND means that if there is a plugin installed that
       * can handle the content, a placeholder is shown until the user clicks on
       * the placeholder. Once clicked, the plugin will be enabled on the page.
       * OFF means that all plugins will be turned off and any fallback content
       * will be used.
       */
      public enum PluginState {
          ON,
          ON_DEMAND,
          OFF
      }
  
      /**
       * In this mode, the WebView will allow a secure origin to load content from any other origin,
       * even if that origin is insecure. This is the least secure mode of operation for the WebView,
       * and where possible apps should not set this mode.
       *
       * @see #setMixedContentMode
       */
      public static final int MIXED_CONTENT_ALWAYS_ALLOW = 0;
  
      /**
       * In this mode, the WebView will not allow a secure origin to load content from an insecure
       * origin. This is the preferred and most secure mode of operation for the WebView and apps are
       * strongly advised to use this mode.
       *
       * @see #setMixedContentMode
       */
      public static final int MIXED_CONTENT_NEVER_ALLOW = 1;
  
      /**
       * In this mode, the WebView will attempt to be compatible with the approach of a modern web
       * browser with regard to mixed content. Some insecure content may be allowed to be loaded by
       * a secure origin and other types of content will be blocked. The types of content are allowed
       * or blocked may change release to release and are not explicitly defined.
       *
       * This mode is intended to be used by apps that are not in control of the content that they
       * render but desire to operate in a reasonably secure environment. For highest security, apps
       * are recommended to use {@link #MIXED_CONTENT_NEVER_ALLOW}.
       *
       * @see #setMixedContentMode
       */
      public static final int MIXED_CONTENT_COMPATIBILITY_MODE = 2;
  
      /** @hide */
      @IntDef(prefix = { "FORCE_DARK_" }, value = {
              FORCE_DARK_OFF,
              FORCE_DARK_AUTO,
              FORCE_DARK_ON
      })
      @Retention(RetentionPolicy.SOURCE)
      public @interface ForceDark {}
  
      /**
       * Disable force dark, irrespective of the force dark mode of the WebView parent. In this mode,
       * WebView content will always be rendered as-is, regardless of whether native views are being
       * automatically darkened.
       *
       * @see #setForceDark
       */
      public static final int FORCE_DARK_OFF = 0;
  
      /**
       * Enable force dark dependent on the state of the WebView parent view. If the WebView parent
       * view is being automatically force darkened
       * (see: {@link android.view.View#setForceDarkAllowed}), then WebView content will be rendered
       * so as to emulate a dark theme. WebViews that are not attached to the view hierarchy will not
       * be inverted.
       *
       * @see #setForceDark
       */
      public static final int FORCE_DARK_AUTO = 1;
  
      /**
       * Unconditionally enable force dark. In this mode WebView content will always be rendered so
       * as to emulate a dark theme.
       *
       * @see #setForceDark
       */
      public static final int FORCE_DARK_ON = 2;
  
      /**
       * Enables dumping the pages navigation cache to a text file. The default
       * is {@code false}.
       *
       * @deprecated This method is now obsolete.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}
       */
      @SystemApi
      @Deprecated
      public abstract void setNavDump(boolean enabled);
  
      /**
       * Gets whether dumping the navigation cache is enabled.
       *
       * @return whether dumping the navigation cache is enabled
       * @see #setNavDump
       * @deprecated This method is now obsolete.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}
       */
      @SystemApi
      @Deprecated
      public abstract boolean getNavDump();
  
      /**
       * Sets whether the WebView should support zooming using its on-screen zoom
       * controls and gestures. The particular zoom mechanisms that should be used
       * can be set with {@link #setBuiltInZoomControls}. This setting does not
       * affect zooming performed using the {@link WebView#zoomIn()} and
       * {@link WebView#zoomOut()} methods. The default is {@code true}.
       *
       * @param support whether the WebView should support zoom
       */
      public abstract void setSupportZoom(boolean support);
  
      /**
       * Gets whether the WebView supports zoom.
       *
       * @return {@code true} if the WebView supports zoom
       * @see #setSupportZoom
       */
      public abstract boolean supportZoom();
  
      /**
       * Sets whether the WebView requires a user gesture to play media.
       * The default is {@code true}.
       *
       * @param require whether the WebView requires a user gesture to play media
       */
      public abstract void setMediaPlaybackRequiresUserGesture(boolean require);
  
      /**
       * Gets whether the WebView requires a user gesture to play media.
       *
       * @return {@code true} if the WebView requires a user gesture to play media
       * @see #setMediaPlaybackRequiresUserGesture
       */
      public abstract boolean getMediaPlaybackRequiresUserGesture();
  
      /**
       * Sets whether the WebView should use its built-in zoom mechanisms. The
       * built-in zoom mechanisms comprise on-screen zoom controls, which are
       * displayed over the WebView's content, and the use of a pinch gesture to
       * control zooming. Whether or not these on-screen controls are displayed
       * can be set with {@link #setDisplayZoomControls}. The default is {@code false}.
       * <p>
       * The built-in mechanisms are the only currently supported zoom
       * mechanisms, so it is recommended that this setting is always enabled.
       * However, on-screen zoom controls are deprecated in Android (see
       * {@link android.widget.ZoomButtonsController}) so it's recommended to
       * disable {@link #setDisplayZoomControls}.
       *
       * @param enabled whether the WebView should use its built-in zoom mechanisms
       */
      // This method was intended to select between the built-in zoom mechanisms
      // and the separate zoom controls. The latter were obtained using
      // {@link WebView#getZoomControls}, which is now hidden.
      public abstract void setBuiltInZoomControls(boolean enabled);
  
      /**
       * Gets whether the zoom mechanisms built into WebView are being used.
       *
       * @return {@code true} if the zoom mechanisms built into WebView are being used
       * @see #setBuiltInZoomControls
       */
      public abstract boolean getBuiltInZoomControls();
  
      /**
       * Sets whether the WebView should display on-screen zoom controls when
       * using the built-in zoom mechanisms. See {@link #setBuiltInZoomControls}.
       * The default is {@code true}. However, on-screen zoom controls are deprecated
       * in Android (see {@link android.widget.ZoomButtonsController}) so it's
       * recommended to set this to {@code false}.
       *
       * @param enabled whether the WebView should display on-screen zoom controls
       */
      public abstract void setDisplayZoomControls(boolean enabled);
  
      /**
       * Gets whether the WebView displays on-screen zoom controls when using
       * the built-in zoom mechanisms.
       *
       * @return {@code true} if the WebView displays on-screen zoom controls when using
       *         the built-in zoom mechanisms
       * @see #setDisplayZoomControls
       */
      public abstract boolean getDisplayZoomControls();
  
      /**
       * Enables or disables file access within WebView. File access is enabled by
       * default.  Note that this enables or disables file system access only.
       * Assets and resources are still accessible using file:///android_asset and
       * file:///android_res.
       */
      public abstract void setAllowFileAccess(boolean allow);
  
      /**
       * Gets whether this WebView supports file access.
       *
       * @see #setAllowFileAccess
       */
      public abstract boolean getAllowFileAccess();
  
      /**
       * Enables or disables content URL access within WebView.  Content URL
       * access allows WebView to load content from a content provider installed
       * in the system. The default is enabled.
       */
      public abstract void setAllowContentAccess(boolean allow);
  
      /**
       * Gets whether this WebView supports content URL access.
       *
       * @see #setAllowContentAccess
       */
      public abstract boolean getAllowContentAccess();
  
      /**
       * Sets whether the WebView loads pages in overview mode, that is,
       * zooms out the content to fit on screen by width. This setting is
       * taken into account when the content width is greater than the width
       * of the WebView control, for example, when {@link #getUseWideViewPort}
       * is enabled. The default is {@code false}.
       */
      public abstract void setLoadWithOverviewMode(boolean overview);
  
      /**
       * Gets whether this WebView loads pages in overview mode.
       *
       * @return whether this WebView loads pages in overview mode
       * @see #setLoadWithOverviewMode
       */
      public abstract boolean getLoadWithOverviewMode();
  
      /**
       * Sets whether the WebView will enable smooth transition while panning or
       * zooming or while the window hosting the WebView does not have focus.
       * If it is {@code true}, WebView will choose a solution to maximize the performance.
       * e.g. the WebView's content may not be updated during the transition.
       * If it is false, WebView will keep its fidelity. The default value is {@code false}.
       *
       * @deprecated This method is now obsolete, and will become a no-op in future.
       */
      @Deprecated
      public abstract void setEnableSmoothTransition(boolean enable);
  
      /**
       * Gets whether the WebView enables smooth transition while panning or
       * zooming.
       *
       * @see #setEnableSmoothTransition
       *
       * @deprecated This method is now obsolete, and will become a no-op in future.
       */
      @Deprecated
      public abstract  boolean enableSmoothTransition();
  
      /**
       * Sets whether the WebView uses its background for over scroll background.
       * If {@code true}, it will use the WebView's background. If {@code false}, it will use an
       * internal pattern. Default is {@code true}.
       *
       * @deprecated This method is now obsolete.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}
       */
      @SystemApi
      @Deprecated
      public abstract  void setUseWebViewBackgroundForOverscrollBackground(boolean view);
  
      /**
       * Gets whether this WebView uses WebView's background instead of
       * internal pattern for over scroll background.
       *
       * @see #setUseWebViewBackgroundForOverscrollBackground
       * @deprecated This method is now obsolete.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}
       */
      @SystemApi
      @Deprecated
      public abstract  boolean getUseWebViewBackgroundForOverscrollBackground();
  
      /**
       * Sets whether the WebView should save form data. In Android O, the
       * platform has implemented a fully functional Autofill feature to store
       * form data. Therefore, the Webview form data save feature is disabled.
       *
       * Note that the feature will continue to be supported on older versions of
       * Android as before.
       *
       * @deprecated In Android O and afterwards, this function does not have
       * any effect, the form data will be saved to platform's autofill service
       * if applicable.
       */
      @Deprecated
      public abstract  void setSaveFormData(boolean save);
  
      /**
       * Gets whether the WebView saves form data.
       *
       * @return whether the WebView saves form data
       * @see #setSaveFormData
       */
      @Deprecated
      public abstract boolean getSaveFormData();
  
      /**
       * Sets whether the WebView should save passwords. The default is {@code true}.
       * @deprecated Saving passwords in WebView will not be supported in future versions.
       */
      @Deprecated
      public abstract void setSavePassword(boolean save);
  
      /**
       * Gets whether the WebView saves passwords.
       *
       * @return whether the WebView saves passwords
       * @see #setSavePassword
       * @deprecated Saving passwords in WebView will not be supported in future versions.
       */
      @Deprecated
      public abstract boolean getSavePassword();
  
      /**
       * Sets the text zoom of the page in percent. The default is 100.
       *
       * @param textZoom the text zoom in percent
       */
      public abstract void setTextZoom(int textZoom);
  
      /**
       * Gets the text zoom of the page in percent.
       *
       * @return the text zoom of the page in percent
       * @see #setTextZoom
       */
      public abstract int getTextZoom();
  
      /**
       * Sets policy for third party cookies.
       * Developers should access this via {@link CookieManager#setShouldAcceptThirdPartyCookies}.
       * @hide Internal API.
       */
      @SystemApi
      public abstract void setAcceptThirdPartyCookies(boolean accept);
  
      /**
       * Gets policy for third party cookies.
       * Developers should access this via {@link CookieManager#getShouldAcceptThirdPartyCookies}.
       * @hide Internal API
       */
      @SystemApi
      public abstract boolean getAcceptThirdPartyCookies();
  
      /**
       * Sets the text size of the page. The default is {@link TextSize#NORMAL}.
       *
       * @param t the text size as a {@link TextSize} value
       * @deprecated Use {@link #setTextZoom} instead.
       */
      @Deprecated
      public synchronized void setTextSize(TextSize t) {
          setTextZoom(t.value);
      }
  
      /**
       * Gets the text size of the page. If the text size was previously specified
       * in percent using {@link #setTextZoom}, this will return the closest
       * matching {@link TextSize}.
       *
       * @return the text size as a {@link TextSize} value
       * @see #setTextSize
       * @deprecated Use {@link #getTextZoom} instead.
       */
      @Deprecated
      public synchronized TextSize getTextSize() {
          TextSize closestSize = null;
          int smallestDelta = Integer.MAX_VALUE;
          int textSize = getTextZoom();
          for (TextSize size : TextSize.values()) {
              int delta = Math.abs(textSize - size.value);
              if (delta == 0) {
                  return size;
              }
              if (delta < smallestDelta) {
                  smallestDelta = delta;
                  closestSize = size;
              }
          }
          return closestSize != null ? closestSize : TextSize.NORMAL;
      }
  
      /**
       * Sets the default zoom density of the page. This must be called from the UI
       * thread. The default is {@link ZoomDensity#MEDIUM}.
       *
       * This setting is not recommended for use in new applications.  If the WebView
       * is utilized to display mobile-oriented pages, the desired effect can be achieved by
       * adjusting 'width' and 'initial-scale' attributes of page's 'meta viewport'
       * tag. For pages lacking the tag, {@link android.webkit.WebView#setInitialScale}
       * and {@link #setUseWideViewPort} can be used.
       *
       * @param zoom the zoom density
       * @deprecated This method is no longer supported, see the function documentation for
       *             recommended alternatives.
       */
      @Deprecated
      public abstract void setDefaultZoom(ZoomDensity zoom);
  
      /**
       * Gets the default zoom density of the page. This should be called from
       * the UI thread.
       *
       * This setting is not recommended for use in new applications.
       *
       * @return the zoom density
       * @see #setDefaultZoom
       * @deprecated Will only return the default value.
       */
      @Deprecated
      public abstract ZoomDensity getDefaultZoom();
  
      /**
       * Enables using light touches to make a selection and activate mouseovers.
       * @deprecated From {@link android.os.Build.VERSION_CODES#JELLY_BEAN} this
       *             setting is obsolete and has no effect.
       */
      @Deprecated
      public abstract void setLightTouchEnabled(boolean enabled);
  
      /**
       * Gets whether light touches are enabled.
       * @see #setLightTouchEnabled
       * @deprecated This setting is obsolete.
       */
      @Deprecated
      public abstract boolean getLightTouchEnabled();
  
      /**
       * Controlled a rendering optimization that is no longer present. Setting
       * it now has no effect.
       *
       * @deprecated This setting now has no effect.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}
       */
      @Deprecated
      @UnsupportedAppUsage
      public void setUseDoubleTree(boolean use) {
          // Specified to do nothing, so no need for derived classes to override.
      }
  
      /**
       * Controlled a rendering optimization that is no longer present. Setting
       * it now has no effect.
       *
       * @deprecated This setting now has no effect.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}
       */
      @Deprecated
      @UnsupportedAppUsage
      public boolean getUseDoubleTree() {
          // Returns false unconditionally, so no need for derived classes to override.
          return false;
      }
  
      /**
       * Sets the user-agent string using an integer code.
       * <ul>
       *   <li>0 means the WebView should use an Android user-agent string</li>
       *   <li>1 means the WebView should use a desktop user-agent string</li>
       * </ul>
       * Other values are ignored. The default is an Android user-agent string,
       * i.e. code value 0.
       *
       * @param ua the integer code for the user-agent string
       * @deprecated Please use {@link #setUserAgentString} instead.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}
       */
      @SystemApi
      @Deprecated
      public abstract void setUserAgent(int ua);
  
      /**
       * Gets the user-agent as an integer code.
       * <ul>
       *   <li>-1 means the WebView is using a custom user-agent string set with
       *   {@link #setUserAgentString}</li>
       *   <li>0 means the WebView should use an Android user-agent string</li>
       *   <li>1 means the WebView should use a desktop user-agent string</li>
       * </ul>
       *
       * @return the integer code for the user-agent string
       * @see #setUserAgent
       * @deprecated Please use {@link #getUserAgentString} instead.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}
       */
      @SystemApi
      @Deprecated
      public abstract int getUserAgent();
  
      /**
       * Sets whether the WebView should enable support for the &quot;viewport&quot;
       * HTML meta tag or should use a wide viewport.
       * When the value of the setting is {@code false}, the layout width is always set to the
       * width of the WebView control in device-independent (CSS) pixels.
       * When the value is {@code true} and the page contains the viewport meta tag, the value
       * of the width specified in the tag is used. If the page does not contain the tag or
       * does not provide a width, then a wide viewport will be used.
       *
       * @param use whether to enable support for the viewport meta tag
       */
      public abstract void setUseWideViewPort(boolean use);
  
      /**
       * Gets whether the WebView supports the &quot;viewport&quot;
       * HTML meta tag or will use a wide viewport.
       *
       * @return {@code true} if the WebView supports the viewport meta tag
       * @see #setUseWideViewPort
       */
      public abstract boolean getUseWideViewPort();
  
      /**
       * Sets whether the WebView whether supports multiple windows. If set to
       * true, {@link WebChromeClient#onCreateWindow} must be implemented by the
       * host application. The default is {@code false}.
       *
       * @param support whether to support multiple windows
       */
      public abstract void setSupportMultipleWindows(boolean support);
  
      /**
       * Gets whether the WebView supports multiple windows.
       *
       * @return {@code true} if the WebView supports multiple windows
       * @see #setSupportMultipleWindows
       */
      public abstract boolean supportMultipleWindows();
  
      /**
       * Sets the underlying layout algorithm. This will cause a re-layout of the
       * WebView. The default is {@link LayoutAlgorithm#NARROW_COLUMNS}.
       *
       * @param l the layout algorithm to use, as a {@link LayoutAlgorithm} value
       */
      public abstract void setLayoutAlgorithm(LayoutAlgorithm l);
  
      /**
       * Gets the current layout algorithm.
       *
       * @return the layout algorithm in use, as a {@link LayoutAlgorithm} value
       * @see #setLayoutAlgorithm
       */
      public abstract LayoutAlgorithm getLayoutAlgorithm();
  
      /**
       * Sets the standard font family name. The default is "sans-serif".
       *
       * @param font a font family name
       */
      public abstract void setStandardFontFamily(String font);
  
      /**
       * Gets the standard font family name.
       *
       * @return the standard font family name as a string
       * @see #setStandardFontFamily
       */
      public abstract String getStandardFontFamily();
  
      /**
       * Sets the fixed font family name. The default is "monospace".
       *
       * @param font a font family name
       */
      public abstract void setFixedFontFamily(String font);
  
      /**
       * Gets the fixed font family name.
       *
       * @return the fixed font family name as a string
       * @see #setFixedFontFamily
       */
      public abstract String getFixedFontFamily();
  
      /**
       * Sets the sans-serif font family name. The default is "sans-serif".
       *
       * @param font a font family name
       */
      public abstract void setSansSerifFontFamily(String font);
  
      /**
       * Gets the sans-serif font family name.
       *
       * @return the sans-serif font family name as a string
       * @see #setSansSerifFontFamily
       */
      public abstract String getSansSerifFontFamily();
  
      /**
       * Sets the serif font family name. The default is "sans-serif".
       *
       * @param font a font family name
       */
      public abstract void setSerifFontFamily(String font);
  
      /**
       * Gets the serif font family name. The default is "serif".
       *
       * @return the serif font family name as a string
       * @see #setSerifFontFamily
       */
      public abstract String getSerifFontFamily();
  
      /**
       * Sets the cursive font family name. The default is "cursive".
       *
       * @param font a font family name
       */
      public abstract void setCursiveFontFamily(String font);
  
      /**
       * Gets the cursive font family name.
       *
       * @return the cursive font family name as a string
       * @see #setCursiveFontFamily
       */
      public abstract String getCursiveFontFamily();
  
      /**
       * Sets the fantasy font family name. The default is "fantasy".
       *
       * @param font a font family name
       */
      public abstract void setFantasyFontFamily(String font);
  
      /**
       * Gets the fantasy font family name.
       *
       * @return the fantasy font family name as a string
       * @see #setFantasyFontFamily
       */
      public abstract String getFantasyFontFamily();
  
      /**
       * Sets the minimum font size. The default is 8.
       *
       * @param size a non-negative integer between 1 and 72. Any number outside
       *             the specified range will be pinned.
       */
      public abstract void setMinimumFontSize(int size);
  
      /**
       * Gets the minimum font size.
       *
       * @return a non-negative integer between 1 and 72
       * @see #setMinimumFontSize
       */
      public abstract int getMinimumFontSize();
  
      /**
       * Sets the minimum logical font size. The default is 8.
       *
       * @param size a non-negative integer between 1 and 72. Any number outside
       *             the specified range will be pinned.
       */
      public abstract void setMinimumLogicalFontSize(int size);
  
      /**
       * Gets the minimum logical font size.
       *
       * @return a non-negative integer between 1 and 72
       * @see #setMinimumLogicalFontSize
       */
      public abstract int getMinimumLogicalFontSize();
  
      /**
       * Sets the default font size. The default is 16.
       *
       * @param size a non-negative integer between 1 and 72. Any number outside
       *             the specified range will be pinned.
       */
      public abstract void setDefaultFontSize(int size);
  
      /**
       * Gets the default font size.
       *
       * @return a non-negative integer between 1 and 72
       * @see #setDefaultFontSize
       */
      public abstract int getDefaultFontSize();
  
      /**
       * Sets the default fixed font size. The default is 16.
       *
       * @param size a non-negative integer between 1 and 72. Any number outside
       *             the specified range will be pinned.
       */
      public abstract void setDefaultFixedFontSize(int size);
  
      /**
       * Gets the default fixed font size.
       *
       * @return a non-negative integer between 1 and 72
       * @see #setDefaultFixedFontSize
       */
      public abstract int getDefaultFixedFontSize();
  
      /**
       * Sets whether the WebView should load image resources. Note that this method
       * controls loading of all images, including those embedded using the data
       * URI scheme. Use {@link #setBlockNetworkImage} to control loading only
       * of images specified using network URI schemes. Note that if the value of this
       * setting is changed from {@code false} to {@code true}, all images resources referenced
       * by content currently displayed by the WebView are loaded automatically.
       * The default is {@code true}.
       *
       * @param flag whether the WebView should load image resources
       */
      public abstract void setLoadsImagesAutomatically(boolean flag);
  
      /**
       * Gets whether the WebView loads image resources. This includes
       * images embedded using the data URI scheme.
       *
       * @return {@code true} if the WebView loads image resources
       * @see #setLoadsImagesAutomatically
       */
      public abstract boolean getLoadsImagesAutomatically();
  
      /**
       * Sets whether the WebView should not load image resources from the
       * network (resources accessed via http and https URI schemes).  Note
       * that this method has no effect unless
       * {@link #getLoadsImagesAutomatically} returns {@code true}. Also note that
       * disabling all network loads using {@link #setBlockNetworkLoads}
       * will also prevent network images from loading, even if this flag is set
       * to false. When the value of this setting is changed from {@code true} to {@code false},
       * network images resources referenced by content currently displayed by
       * the WebView are fetched automatically. The default is {@code false}.
       *
       * @param flag whether the WebView should not load image resources from the
       *             network
       * @see #setBlockNetworkLoads
       */
      public abstract void setBlockNetworkImage(boolean flag);
  
      /**
       * Gets whether the WebView does not load image resources from the network.
       *
       * @return {@code true} if the WebView does not load image resources from the network
       * @see #setBlockNetworkImage
       */
      public abstract boolean getBlockNetworkImage();
  
      /**
       * Sets whether the WebView should not load resources from the network.
       * Use {@link #setBlockNetworkImage} to only avoid loading
       * image resources. Note that if the value of this setting is
       * changed from {@code true} to {@code false}, network resources referenced by content
       * currently displayed by the WebView are not fetched until
       * {@link android.webkit.WebView#reload} is called.
       * If the application does not have the
       * {@link android.Manifest.permission#INTERNET} permission, attempts to set
       * a value of {@code false} will cause a {@link java.lang.SecurityException}
       * to be thrown. The default value is {@code false} if the application has the
       * {@link android.Manifest.permission#INTERNET} permission, otherwise it is
       * {@code true}.
       *
       * @param flag {@code true} means block network loads by the WebView
       * @see android.webkit.WebView#reload
       */
      public abstract void setBlockNetworkLoads(boolean flag);
  
      /**
       * Gets whether the WebView does not load any resources from the network.
       *
       * @return {@code true} if the WebView does not load any resources from the network
       * @see #setBlockNetworkLoads
       */
      public abstract boolean getBlockNetworkLoads();
  
      /**
       * Tells the WebView to enable JavaScript execution.
       * <b>The default is {@code false}.</b>
       *
       * @param flag {@code true} if the WebView should execute JavaScript
       */
      public abstract void setJavaScriptEnabled(boolean flag);
  
      /**
       * Sets whether JavaScript running in the context of a file scheme URL
       * should be allowed to access content from any origin. This includes
       * access to content from other file scheme URLs. See
       * {@link #setAllowFileAccessFromFileURLs}. To enable the most restrictive,
       * and therefore secure policy, this setting should be disabled.
       * Note that this setting affects only JavaScript access to file scheme
       * resources. Other access to such resources, for example, from image HTML
       * elements, is unaffected. To prevent possible violation of same domain policy
       * when targeting {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH_MR1} and earlier,
       * you should explicitly set this value to {@code false}.
       * <p>
       * The default value is {@code true} for apps targeting
       * {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH_MR1} and below,
       * and {@code false} when targeting {@link android.os.Build.VERSION_CODES#JELLY_BEAN}
       * and above.
       *
       * @param flag whether JavaScript running in the context of a file scheme
       *             URL should be allowed to access content from any origin
       */
      public abstract void setAllowUniversalAccessFromFileURLs(boolean flag);
  
      /**
       * Sets whether JavaScript running in the context of a file scheme URL
       * should be allowed to access content from other file scheme URLs. To
       * enable the most restrictive, and therefore secure, policy this setting
       * should be disabled. Note that the value of this setting is ignored if
       * the value of {@link #getAllowUniversalAccessFromFileURLs} is {@code true}.
       * Note too, that this setting affects only JavaScript access to file scheme
       * resources. Other access to such resources, for example, from image HTML
       * elements, is unaffected. To prevent possible violation of same domain policy
       * when targeting {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH_MR1} and earlier,
       * you should explicitly set this value to {@code false}.
       * <p>
       * The default value is {@code true} for apps targeting
       * {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH_MR1} and below,
       * and {@code false} when targeting {@link android.os.Build.VERSION_CODES#JELLY_BEAN}
       * and above.
       *
       * @param flag whether JavaScript running in the context of a file scheme
       *             URL should be allowed to access content from other file
       *             scheme URLs
       */
      public abstract void setAllowFileAccessFromFileURLs(boolean flag);
  
      /**
       * Sets whether the WebView should enable plugins. The default is {@code false}.
       *
       * @param flag {@code true} if plugins should be enabled
       * @deprecated This method has been deprecated in favor of
       *             {@link #setPluginState}
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}
       */
      @SystemApi
      @Deprecated
      public abstract void setPluginsEnabled(boolean flag);
  
      /**
       * Tells the WebView to enable, disable, or have plugins on demand. On
       * demand mode means that if a plugin exists that can handle the embedded
       * content, a placeholder icon will be shown instead of the plugin. When
       * the placeholder is clicked, the plugin will be enabled. The default is
       * {@link PluginState#OFF}.
       *
       * @param state a PluginState value
       * @deprecated Plugins are not supported in API level
       *             {@link android.os.Build.VERSION_CODES#KITKAT} or later;
       *             enabling plugins is a no-op.
       */
      @Deprecated
      public abstract void setPluginState(PluginState state);
  
      /**
       * Sets a custom path to plugins used by the WebView. This method is
       * obsolete since each plugin is now loaded from its own package.
       *
       * @param pluginsPath a String path to the directory containing plugins
       * @deprecated This method is no longer used as plugins are loaded from
       *             their own APK via the system's package manager.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}
       */
      @Deprecated
      @UnsupportedAppUsage
      public void setPluginsPath(String pluginsPath) {
          // Specified to do nothing, so no need for derived classes to override.
      }
  
      /**
       * Sets the path to where database storage API databases should be saved.
       * In order for the database storage API to function correctly, this method
       * must be called with a path to which the application can write. This
       * method should only be called once: repeated calls are ignored.
       *
       * @param databasePath a path to the directory where databases should be
       *                     saved.
       * @deprecated Database paths are managed by the implementation and calling this method
       *             will have no effect.
       */
      @Deprecated
      public abstract void setDatabasePath(String databasePath);
  
      /**
       * Sets the path where the Geolocation databases should be saved. In order
       * for Geolocation permissions and cached positions to be persisted, this
       * method must be called with a path to which the application can write.
       *
       * @param databasePath a path to the directory where databases should be
       *                     saved.
       * @deprecated Geolocation database are managed by the implementation and calling this method
       *             will have no effect.
       */
      @Deprecated
      public abstract void setGeolocationDatabasePath(String databasePath);
  
      /**
       * Sets whether the Application Caches API should be enabled. The default
       * is {@code false}. Note that in order for the Application Caches API to be
       * enabled, a valid database path must also be supplied to
       * {@link #setAppCachePath}.
       *
       * @param flag {@code true} if the WebView should enable Application Caches
       */
      public abstract void setAppCacheEnabled(boolean flag);
  
      /**
       * Sets the path to the Application Caches files. In order for the
       * Application Caches API to be enabled, this method must be called with a
       * path to which the application can write. This method should only be
       * called once: repeated calls are ignored.
       *
       * @param appCachePath a String path to the directory containing
       *                     Application Caches files.
       * @see #setAppCacheEnabled
       */
      public abstract void setAppCachePath(String appCachePath);
  
      /**
       * Sets the maximum size for the Application Cache content. The passed size
       * will be rounded to the nearest value that the database can support, so
       * this should be viewed as a guide, not a hard limit. Setting the
       * size to a value less than current database size does not cause the
       * database to be trimmed. The default size is {@link Long#MAX_VALUE}.
       * It is recommended to leave the maximum size set to the default value.
       *
       * @param appCacheMaxSize the maximum size in bytes
       * @deprecated In future quota will be managed automatically.
       */
      @Deprecated
      public abstract void setAppCacheMaxSize(long appCacheMaxSize);
  
      /**
       * Sets whether the database storage API is enabled. The default value is
       * false. See also {@link #setDatabasePath} for how to correctly set up the
       * database storage API.
       *
       * This setting is global in effect, across all WebView instances in a process.
       * Note you should only modify this setting prior to making <b>any</b> WebView
       * page load within a given process, as the WebView implementation may ignore
       * changes to this setting after that point.
       *
       * @param flag {@code true} if the WebView should use the database storage API
       */
      public abstract void setDatabaseEnabled(boolean flag);
  
      /**
       * Sets whether the DOM storage API is enabled. The default value is {@code false}.
       *
       * @param flag {@code true} if the WebView should use the DOM storage API
       */
      public abstract void setDomStorageEnabled(boolean flag);
  
      /**
       * Gets whether the DOM Storage APIs are enabled.
       *
       * @return {@code true} if the DOM Storage APIs are enabled
       * @see #setDomStorageEnabled
       */
      public abstract boolean getDomStorageEnabled();
  
      /**
       * Gets the path to where database storage API databases are saved.
       *
       * @return the String path to the database storage API databases
       * @see #setDatabasePath
       * @deprecated Database paths are managed by the implementation this method is obsolete.
       */
      @Deprecated
      public abstract String getDatabasePath();
  
      /**
       * Gets whether the database storage API is enabled.
       *
       * @return {@code true} if the database storage API is enabled
       * @see #setDatabaseEnabled
       */
      public abstract boolean getDatabaseEnabled();
  
      /**
       * Sets whether Geolocation is enabled. The default is {@code true}.
       * <p>
       * Please note that in order for the Geolocation API to be usable
       * by a page in the WebView, the following requirements must be met:
       * <ul>
       *   <li>an application must have permission to access the device location,
       *   see {@link android.Manifest.permission#ACCESS_COARSE_LOCATION},
       *   {@link android.Manifest.permission#ACCESS_FINE_LOCATION};
       *   <li>an application must provide an implementation of the
       *   {@link WebChromeClient#onGeolocationPermissionsShowPrompt} callback
       *   to receive notifications that a page is requesting access to location
       *   via the JavaScript Geolocation API.
       * </ul>
       * <p>
       *
       * @param flag whether Geolocation should be enabled
       */
      public abstract void setGeolocationEnabled(boolean flag);
  
      /**
       * Gets whether JavaScript is enabled.
       *
       * @return {@code true} if JavaScript is enabled
       * @see #setJavaScriptEnabled
       */
      public abstract boolean getJavaScriptEnabled();
  
      /**
       * Gets whether JavaScript running in the context of a file scheme URL can
       * access content from any origin. This includes access to content from
       * other file scheme URLs.
       *
       * @return whether JavaScript running in the context of a file scheme URL
       *         can access content from any origin
       * @see #setAllowUniversalAccessFromFileURLs
       */
      public abstract boolean getAllowUniversalAccessFromFileURLs();
  
      /**
       * Gets whether JavaScript running in the context of a file scheme URL can
       * access content from other file scheme URLs.
       *
       * @return whether JavaScript running in the context of a file scheme URL
       *         can access content from other file scheme URLs
       * @see #setAllowFileAccessFromFileURLs
       */
      public abstract boolean getAllowFileAccessFromFileURLs();
  
      /**
       * Gets whether plugins are enabled.
       *
       * @return {@code true} if plugins are enabled
       * @see #setPluginsEnabled
       * @deprecated This method has been replaced by {@link #getPluginState}
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}
       */
      @SystemApi
      @Deprecated
      public abstract boolean getPluginsEnabled();
  
      /**
       * Gets the current state regarding whether plugins are enabled.
       *
       * @return the plugin state as a {@link PluginState} value
       * @see #setPluginState
       * @deprecated Plugins are not supported in API level
       *             {@link android.os.Build.VERSION_CODES#KITKAT} or later;
       *             enabling plugins is a no-op.
       */
      @Deprecated
      public abstract PluginState getPluginState();
  
      /**
       * Gets the directory that contains the plugin libraries. This method is
       * obsolete since each plugin is now loaded from its own package.
       *
       * @return an empty string
       * @deprecated This method is no longer used as plugins are loaded from
       * their own APK via the system's package manager.
       * @hide Since API level {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}
       */
      @Deprecated
      @UnsupportedAppUsage
      public String getPluginsPath() {
          // Unconditionally returns empty string, so no need for derived classes to override.
          return "";
      }
  
      /**
       * Tells JavaScript to open windows automatically. This applies to the
       * JavaScript function {@code window.open()}. The default is {@code false}.
       *
       * @param flag {@code true} if JavaScript can open windows automatically
       */
      public abstract void setJavaScriptCanOpenWindowsAutomatically(boolean flag);
  
      /**
       * Gets whether JavaScript can open windows automatically.
       *
       * @return {@code true} if JavaScript can open windows automatically during
       *         {@code window.open()}
       * @see #setJavaScriptCanOpenWindowsAutomatically
       */
      public abstract boolean getJavaScriptCanOpenWindowsAutomatically();
  
      /**
       * Sets the default text encoding name to use when decoding html pages.
       * The default is "UTF-8".
       *
       * @param encoding the text encoding name
       */
      public abstract void setDefaultTextEncodingName(String encoding);
  
      /**
       * Gets the default text encoding name.
       *
       * @return the default text encoding name as a string
       * @see #setDefaultTextEncodingName
       */
      public abstract String getDefaultTextEncodingName();
  
      /**
       * Sets the WebView's user-agent string. If the string is {@code null} or empty,
       * the system default value will be used.
       *
       * Note that starting from {@link android.os.Build.VERSION_CODES#KITKAT} Android
       * version, changing the user-agent while loading a web page causes WebView
       * to initiate loading once again.
       *
       * @param ua new user-agent string
       */
      public abstract void setUserAgentString(@Nullable String ua);
  
      /**
       * Gets the WebView's user-agent string.
       *
       * @return the WebView's user-agent string
       * @see #setUserAgentString
       */
      public abstract String getUserAgentString();
  
      /**
       * Returns the default User-Agent used by a WebView.
       * An instance of WebView could use a different User-Agent if a call
       * is made to {@link WebSettings#setUserAgentString(String)}.
       *
       * @param context a Context object used to access application assets
       */
      public static String getDefaultUserAgent(Context context) {
          return WebViewFactory.getProvider().getStatics().getDefaultUserAgent(context);
      }
  
      /**
       * Tells the WebView whether it needs to set a node to have focus when
       * {@link WebView#requestFocus(int, android.graphics.Rect)} is called. The
       * default value is {@code true}.
       *
       * @param flag whether the WebView needs to set a node
       */
      public abstract void setNeedInitialFocus(boolean flag);
  
      /**
       * Sets the priority of the Render thread. Unlike the other settings, this
       * one only needs to be called once per process. The default value is
       * {@link RenderPriority#NORMAL}.
       *
       * @param priority the priority
       * @deprecated It is not recommended to adjust thread priorities, and this will
       *             not be supported in future versions.
       */
      @Deprecated
      public abstract void setRenderPriority(RenderPriority priority);
  
      /**
       * Overrides the way the cache is used. The way the cache is used is based
       * on the navigation type. For a normal page load, the cache is checked
       * and content is re-validated as needed. When navigating back, content is
       * not revalidated, instead the content is just retrieved from the cache.
       * This method allows the client to override this behavior by specifying
       * one of {@link #LOAD_DEFAULT},
       * {@link #LOAD_CACHE_ELSE_NETWORK}, {@link #LOAD_NO_CACHE} or
       * {@link #LOAD_CACHE_ONLY}. The default value is {@link #LOAD_DEFAULT}.
       *
       * @param mode the mode to use
       */
      public abstract void setCacheMode(@CacheMode int mode);
  
      /**
       * Gets the current setting for overriding the cache mode.
       *
       * @return the current setting for overriding the cache mode
       * @see #setCacheMode
       */
      @CacheMode
      public abstract int getCacheMode();
  
      /**
       * Configures the WebView's behavior when a secure origin attempts to load a resource from an
       * insecure origin.
       *
       * By default, apps that target {@link android.os.Build.VERSION_CODES#KITKAT} or below default
       * to {@link #MIXED_CONTENT_ALWAYS_ALLOW}. Apps targeting
       * {@link android.os.Build.VERSION_CODES#LOLLIPOP} default to {@link #MIXED_CONTENT_NEVER_ALLOW}.
       *
       * The preferred and most secure mode of operation for the WebView is
       * {@link #MIXED_CONTENT_NEVER_ALLOW} and use of {@link #MIXED_CONTENT_ALWAYS_ALLOW} is
       * strongly discouraged.
       *
       * @param mode The mixed content mode to use. One of {@link #MIXED_CONTENT_NEVER_ALLOW},
       *     {@link #MIXED_CONTENT_ALWAYS_ALLOW} or {@link #MIXED_CONTENT_COMPATIBILITY_MODE}.
       */
      public abstract void setMixedContentMode(int mode);
  
      /**
       * Gets the current behavior of the WebView with regard to loading insecure content from a
       * secure origin.
       * @return The current setting, one of {@link #MIXED_CONTENT_NEVER_ALLOW},
       *     {@link #MIXED_CONTENT_ALWAYS_ALLOW} or {@link #MIXED_CONTENT_COMPATIBILITY_MODE}.
       */
      public abstract int getMixedContentMode();
  
      /**
       * Sets whether to use a video overlay for embedded encrypted video.
       * In API levels prior to {@link android.os.Build.VERSION_CODES#LOLLIPOP}, encrypted video can
       * only be rendered directly on a secure video surface, so it had been a hard problem to play
       * encrypted video in HTML.  When this flag is on, WebView can play encrypted video (MSE/EME)
       * by using a video overlay (aka hole-punching) for videos embedded using HTML &lt;video&gt;
       * tag.<br>
       * Caution: This setting is intended for use only in a narrow set of circumstances and apps
       * should only enable it if they require playback of encrypted video content. It will impose
       * the following limitations on the WebView:
       * <ul>
       * <li> Only one video overlay can be played at a time.
       * <li> Changes made to position or dimensions of a video element may be propagated to the
       * corresponding video overlay with a noticeable delay.
       * <li> The video overlay is not visible to web APIs and as such may not interact with
       * script or styling. For example, CSS styles applied to the &lt;video&gt; tag may be ignored.
       * </ul>
       * This is not an exhaustive set of constraints and it may vary with new versions of the
       * WebView.
       * @hide
       */
      @SystemApi
      public abstract void setVideoOverlayForEmbeddedEncryptedVideoEnabled(boolean flag);
  
      /**
       * Gets whether a video overlay will be used for embedded encrypted video.
       *
       * @return {@code true} if WebView uses a video overlay for embedded encrypted video.
       * @see #setVideoOverlayForEmbeddedEncryptedVideoEnabled
       * @hide
       */
      @SystemApi
      public abstract boolean getVideoOverlayForEmbeddedEncryptedVideoEnabled();
  
      /**
       * Sets whether this WebView should raster tiles when it is
       * offscreen but attached to a window. Turning this on can avoid
       * rendering artifacts when animating an offscreen WebView on-screen.
       * Offscreen WebViews in this mode use more memory. The default value is
       * false.<br>
       * Please follow these guidelines to limit memory usage:
       * <ul>
       * <li> WebView size should be not be larger than the device screen size.
       * <li> Limit use of this mode to a small number of WebViews. Use it for
       *   visible WebViews and WebViews about to be animated to visible.
       * </ul>
       */
      public abstract void setOffscreenPreRaster(boolean enabled);
  
      /**
       * Gets whether this WebView should raster tiles when it is
       * offscreen but attached to a window.
       * @return {@code true} if this WebView will raster tiles when it is
       * offscreen but attached to a window.
       */
      public abstract boolean getOffscreenPreRaster();
  
  
      /**
       * Sets whether Safe Browsing is enabled. Safe Browsing allows WebView to
       * protect against malware and phishing attacks by verifying the links.
       *
       * <p>
       * Safe Browsing can be disabled for all WebViews using a manifest tag (read <a
       * href="{@docRoot}reference/android/webkit/WebView.html">general Safe Browsing info</a>). The
       * manifest tag has a lower precedence than this API.
       *
       * <p>
       * Safe Browsing is enabled by default for devices which support it.
       *
       * @param enabled Whether Safe Browsing is enabled.
       */
      public abstract void setSafeBrowsingEnabled(boolean enabled);
  
      /**
       * Gets whether Safe Browsing is enabled.
       * See {@link #setSafeBrowsingEnabled}.
       *
       * @return {@code true} if Safe Browsing is enabled and {@code false} otherwise.
       */
      public abstract boolean getSafeBrowsingEnabled();
  
  
      /**
       * Set the force dark mode for this WebView.
       *
       * @param forceDark the force dark mode to set.
       * @see #getForceDark
       */
      public void setForceDark(@ForceDark int forceDark) {
          // Stub implementation to satisfy Roboelectrc shadows that don't override this yet.
      }
  
      /**
       * Get the force dark mode for this WebView.
       * The default force dark mode is {@link #FORCE_DARK_AUTO}.
       *
       * @return the currently set force dark mode.
       * @see #setForceDark
       */
      public @ForceDark int getForceDark() {
          // Stub implementation to satisfy Roboelectrc shadows that don't override this yet.
          return FORCE_DARK_AUTO;
      }
  
      /**
       * @hide
       */
      @IntDef(flag = true, prefix = { "MENU_ITEM_" }, value = {
              MENU_ITEM_NONE,
              MENU_ITEM_SHARE,
              MENU_ITEM_WEB_SEARCH,
              MENU_ITEM_PROCESS_TEXT
      })
      @Retention(RetentionPolicy.SOURCE)
      @Target({ElementType.PARAMETER, ElementType.METHOD})
      private @interface MenuItemFlags {}
  
      /**
       * Disables the action mode menu items according to {@code menuItems} flag.
       * @param menuItems an integer field flag for the menu items to be disabled.
       */
      public abstract void setDisabledActionModeMenuItems(@MenuItemFlags int menuItems);
  
      /**
       * Gets the action mode menu items that are disabled, expressed in an integer field flag.
       * The default value is {@link #MENU_ITEM_NONE}
       *
       * @return all the disabled menu item flags combined with bitwise OR.
       */
      public abstract @MenuItemFlags int getDisabledActionModeMenuItems();
  
      /**
       * No menu items should be disabled.
       *
       * @see #setDisabledActionModeMenuItems
       */
      public static final int MENU_ITEM_NONE = 0;
  
      /**
       * Disable menu item "Share".
       *
       * @see #setDisabledActionModeMenuItems
       */
      public static final int MENU_ITEM_SHARE = 1 << 0;
  
      /**
       * Disable menu item "Web Search".
       *
       * @see #setDisabledActionModeMenuItems
       */
      public static final int MENU_ITEM_WEB_SEARCH = 1 << 1;
  
      /**
       * Disable all the action mode menu items for text processing.
       * By default WebView searches for activities that are able to handle
       * {@link android.content.Intent#ACTION_PROCESS_TEXT} and show them in the
       * action mode menu. If this flag is set via {@link
       * #setDisabledActionModeMenuItems}, these menu items will be disabled.
       *
       * @see #setDisabledActionModeMenuItems
       */
      public static final int MENU_ITEM_PROCESS_TEXT = 1 << 2;
  }
  