root/android_webview/java/src/org/chromium/android_webview/AwSettings.java

DEFINITIONS

1. JNINamespace
2. bindUiThread
3. runOnUiThreadBlockingAndLocked
4. maybePostOnUiThread
5. updateWebkitPreferencesLocked
6. onGestureZoomSupportChanged
7. nativeAwSettingsGone
8. getDIPScaleLocked
9. setDIPScale
10. setZoomListener
11. setWebContents
12. setBlockNetworkLoads
13. getBlockNetworkLoads
14. setAllowFileAccess
15. getAllowFileAccess
16. setAllowContentAccess
17. getAllowContentAccess
18. setCacheMode
19. getCacheMode
20. setShouldFocusFirstNode
21. setInitialPageScale
22. getInitialPageScalePercentLocked
23. setSpatialNavigationEnabled
24. getSpatialNavigationLocked
25. setEnableSupportedHardwareAcceleratedFeatures
26. getEnableSupportedHardwareAcceleratedFeaturesLocked
27. shouldFocusFirstNode
28. setGeolocationEnabled
29. getGeolocationEnabled
30. setSaveFormData
31. getSaveFormData
32. getSaveFormDataLocked
33. getDefaultUserAgent
34. setUserAgentString
35. getUserAgentString
36. getUserAgentLocked
37. setLoadWithOverviewMode
38. getLoadWithOverviewMode
39. getLoadWithOverviewModeLocked
40. setTextZoom
41. getTextZoom
42. getTextSizePercentLocked
43. setStandardFontFamily
44. getStandardFontFamily
45. getStandardFontFamilyLocked
46. setFixedFontFamily
47. getFixedFontFamily
48. getFixedFontFamilyLocked
49. setSansSerifFontFamily
50. getSansSerifFontFamily
51. getSansSerifFontFamilyLocked
52. setSerifFontFamily
53. getSerifFontFamily
54. getSerifFontFamilyLocked
55. setCursiveFontFamily
56. getCursiveFontFamily
57. getCursiveFontFamilyLocked
58. setFantasyFontFamily
59. getFantasyFontFamily
60. getFantasyFontFamilyLocked
61. setMinimumFontSize
62. getMinimumFontSize
63. getMinimumFontSizeLocked
64. setMinimumLogicalFontSize
65. getMinimumLogicalFontSize
66. getMinimumLogicalFontSizeLocked
67. setDefaultFontSize
68. getDefaultFontSize
69. getDefaultFontSizeLocked
70. setDefaultFixedFontSize
71. getDefaultFixedFontSize
72. getDefaultFixedFontSizeLocked
73. setJavaScriptEnabled
74. setAllowUniversalAccessFromFileURLs
75. setAllowFileAccessFromFileURLs
76. setLoadsImagesAutomatically
77. getLoadsImagesAutomatically
78. getLoadsImagesAutomaticallyLocked
79. setImagesEnabled
80. getImagesEnabled
81. getImagesEnabledLocked
82. getJavaScriptEnabled
83. getJavaScriptEnabledLocked
84. getAllowUniversalAccessFromFileURLs
85. getAllowUniversalAccessFromFileURLsLocked
86. getAllowFileAccessFromFileURLs
87. getAllowFileAccessFromFileURLsLocked
88. setPluginsEnabled
89. setPluginState
90. getPluginsEnabled
91. getPluginsDisabledLocked
92. getPluginState
93. setJavaScriptCanOpenWindowsAutomatically
94. getJavaScriptCanOpenWindowsAutomatically
95. getJavaScriptCanOpenWindowsAutomaticallyLocked
96. setLayoutAlgorithm
97. getLayoutAlgorithm
98. getTextAutosizingEnabledLocked
99. setSupportMultipleWindows
100. supportMultipleWindows
101. getSupportMultipleWindowsLocked
102. getSupportLegacyQuirksLocked
103. setUseWideViewPort
104. getUseWideViewPort
105. getUseWideViewportLocked
106. getPasswordEchoEnabledLocked
107. setAppCacheEnabled
108. setAppCachePath
109. getAppCacheEnabledLocked
110. setDomStorageEnabled
111. getDomStorageEnabled
112. getDomStorageEnabledLocked
113. setDatabaseEnabled
114. getDatabaseEnabled
115. getDatabaseEnabledLocked
116. setDefaultTextEncodingName
117. getDefaultTextEncodingName
118. getDefaultTextEncodingLocked
119. setMediaPlaybackRequiresUserGesture
120. getMediaPlaybackRequiresUserGesture
121. getMediaPlaybackRequiresUserGestureLocked
122. setDefaultVideoPosterURL
123. getDefaultVideoPosterURL
124. getDefaultVideoPosterURLLocked
125. onGestureZoomSupportChanged
126. setSupportZoom
127. supportZoom
128. setBuiltInZoomControls
129. getBuiltInZoomControls
130. setDisplayZoomControls
131. getDisplayZoomControls
132. supportsDoubleTapZoomLocked
133. supportsMultiTouchZoomLocked
134. supportsMultiTouchZoom
135. shouldDisplayZoomControls
136. clipFontSize
137. updateEverything
138. populateWebPreferences
139. updateWebkitPreferencesOnUiThreadLocked
140. nativeInit
141. nativeDestroy
142. nativePopulateWebPreferencesLocked
143. nativeResetScrollAndScaleState
144. nativeUpdateEverythingLocked
145. nativeUpdateInitialPageScaleLocked
146. nativeUpdateUserAgentLocked
147. nativeUpdateWebkitPreferencesLocked
148. nativeGetDefaultUserAgent
149. nativeUpdateFormDataPreferencesLocked

// Copyright 2012 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.android_webview;

import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Handler;
import android.os.Message;
import android.os.Process;
import android.provider.Settings;
import android.util.Log;
import android.webkit.WebSettings;
import android.webkit.WebSettings.PluginState;

import org.chromium.base.CalledByNative;
import org.chromium.base.JNINamespace;
import org.chromium.base.ThreadUtils;

/**
 * Stores Android WebView specific settings that does not need to be synced to WebKit.
 * Use {@link org.chromium.content.browser.ContentSettings} for WebKit settings.
 *
 * Methods in this class can be called from any thread, including threads created by
 * the client of WebView.
 */
@JNINamespace("android_webview")
public class AwSettings {
    // This enum corresponds to WebSettings.LayoutAlgorithm. We use our own to be
    // able to extend it.
    public enum LayoutAlgorithm {
        NORMAL,
        SINGLE_COLUMN,
        NARROW_COLUMNS,
        TEXT_AUTOSIZING,
    }

    private static final String TAG = "AwSettings";

    // This class must be created on the UI thread. Afterwards, it can be
    // used from any thread. Internally, the class uses a message queue
    // to call native code on the UI thread only.

    // Values passed in on construction.
    private final boolean mHasInternetPermission;

    private ZoomSupportChangeListener mZoomChangeListener;
    private double mDIPScale = 1.0;

    // Lock to protect all settings.
    private final Object mAwSettingsLock = new Object();

    private LayoutAlgorithm mLayoutAlgorithm = LayoutAlgorithm.NARROW_COLUMNS;
    private int mTextSizePercent = 100;
    private String mStandardFontFamily = "sans-serif";
    private String mFixedFontFamily = "monospace";
    private String mSansSerifFontFamily = "sans-serif";
    private String mSerifFontFamily = "serif";
    private String mCursiveFontFamily = "cursive";
    private String mFantasyFontFamily = "fantasy";
    private String mDefaultTextEncoding;
    private String mUserAgent;
    private int mMinimumFontSize = 8;
    private int mMinimumLogicalFontSize = 8;
    private int mDefaultFontSize = 16;
    private int mDefaultFixedFontSize = 13;
    private boolean mLoadsImagesAutomatically = true;
    private boolean mImagesEnabled = true;
    private boolean mJavaScriptEnabled = false;
    private boolean mAllowUniversalAccessFromFileURLs = false;
    private boolean mAllowFileAccessFromFileURLs = false;
    private boolean mJavaScriptCanOpenWindowsAutomatically = false;
    private boolean mSupportMultipleWindows = false;
    private PluginState mPluginState = PluginState.OFF;
    private boolean mAppCacheEnabled = false;
    private boolean mDomStorageEnabled = false;
    private boolean mDatabaseEnabled = false;
    private boolean mUseWideViewport = false;
    private boolean mLoadWithOverviewMode = false;
    private boolean mMediaPlaybackRequiresUserGesture = true;
    private String mDefaultVideoPosterURL;
    private float mInitialPageScalePercent = 0;
    private boolean mSpatialNavigationEnabled;  // Default depends on device features.
    private boolean mEnableSupportedHardwareAcceleratedFeatures = false;

    private final boolean mSupportLegacyQuirks;

    private final boolean mPasswordEchoEnabled;

    // Not accessed by the native side.
    private boolean mBlockNetworkLoads;  // Default depends on permission of embedding APK.
    private boolean mAllowContentUrlAccess = true;
    private boolean mAllowFileUrlAccess = true;
    private int mCacheMode = WebSettings.LOAD_DEFAULT;
    private boolean mShouldFocusFirstNode = true;
    private boolean mGeolocationEnabled = true;
    private boolean mAutoCompleteEnabled = true;
    private boolean mSupportZoom = true;
    private boolean mBuiltInZoomControls = false;
    private boolean mDisplayZoomControls = true;

    static class LazyDefaultUserAgent{
        // Lazy Holder pattern
        private static final String sInstance = nativeGetDefaultUserAgent();
    }

    // Protects access to settings global fields.
    private static final Object sGlobalContentSettingsLock = new Object();
    // For compatibility with the legacy WebView, we can only enable AppCache when the path is
    // provided. However, we don't use the path, so we just check if we have received it from the
    // client.
    private static boolean sAppCachePathIsSet = false;

    // The native side of this object. It's lifetime is bounded by the WebContent it is attached to.
    private long mNativeAwSettings = 0;

    // Custom handler that queues messages to call native code on the UI thread.
    private final EventHandler mEventHandler;

    private static final int MINIMUM_FONT_SIZE = 1;
    private static final int MAXIMUM_FONT_SIZE = 72;

    // Class to handle messages to be processed on the UI thread.
    private class EventHandler {
        // Message id for running a Runnable with mAwSettingsLock held.
        private static final int RUN_RUNNABLE_BLOCKING = 0;
        // Actual UI thread handler
        private Handler mHandler;
        // Synchronization flag.
        private boolean mSynchronizationPending = false;

        EventHandler() {
        }

        void bindUiThread() {
            if (mHandler != null) return;
            mHandler = new Handler(ThreadUtils.getUiThreadLooper()) {
                @Override
                public void handleMessage(Message msg) {
                    switch (msg.what) {
                        case RUN_RUNNABLE_BLOCKING:
                            synchronized (mAwSettingsLock) {
                                if (mNativeAwSettings != 0) {
                                    ((Runnable)msg.obj).run();
                                }
                                mSynchronizationPending = false;
                                mAwSettingsLock.notifyAll();
                            }
                            break;
                    }
                }
            };
        }

        void runOnUiThreadBlockingAndLocked(Runnable r) {
            assert Thread.holdsLock(mAwSettingsLock);
            if (mHandler == null) return;
            if (ThreadUtils.runningOnUiThread()) {
                r.run();
            } else {
                assert !mSynchronizationPending;
                mSynchronizationPending = true;
                mHandler.sendMessage(Message.obtain(null, RUN_RUNNABLE_BLOCKING, r));
                try {
                    while (mSynchronizationPending) {
                        mAwSettingsLock.wait();
                    }
                } catch (InterruptedException e) {
                    Log.e(TAG, "Interrupted waiting a Runnable to complete", e);
                    mSynchronizationPending = false;
                }
            }
        }

        void maybePostOnUiThread(Runnable r) {
            if (mHandler != null) {
                mHandler.post(r);
            }
        }

        void updateWebkitPreferencesLocked() {
            runOnUiThreadBlockingAndLocked(new Runnable() {
                @Override
                public void run() {
                    updateWebkitPreferencesOnUiThreadLocked();
                }
            });
        }
    }

    interface ZoomSupportChangeListener {
        public void onGestureZoomSupportChanged(
                boolean supportsDoubleTapZoom, boolean supportsMultiTouchZoom);
    }

    public AwSettings(Context context,
            boolean isAccessFromFileURLsGrantedByDefault,
            boolean supportsLegacyQuirks) {
       boolean hasInternetPermission = context.checkPermission(
                    android.Manifest.permission.INTERNET,
                    Process.myPid(),
                    Process.myUid()) == PackageManager.PERMISSION_GRANTED;
        synchronized (mAwSettingsLock) {
            mHasInternetPermission = hasInternetPermission;
            mBlockNetworkLoads = !hasInternetPermission;
            mEventHandler = new EventHandler();
            if (isAccessFromFileURLsGrantedByDefault) {
                mAllowUniversalAccessFromFileURLs = true;
                mAllowFileAccessFromFileURLs = true;
            }

            mDefaultTextEncoding = AwResource.getDefaultTextEncoding();
            mUserAgent = LazyDefaultUserAgent.sInstance;

            // Best-guess a sensible initial value based on the features supported on the device.
            mSpatialNavigationEnabled = !context.getPackageManager().hasSystemFeature(
                    PackageManager.FEATURE_TOUCHSCREEN);

            // Respect the system setting for password echoing.
            mPasswordEchoEnabled = Settings.System.getInt(context.getContentResolver(),
                    Settings.System.TEXT_SHOW_PASSWORD, 1) == 1;

            // By default, scale the text size by the system font scale factor. Embedders
            // may override this by invoking setTextZoom().
            mTextSizePercent *= context.getResources().getConfiguration().fontScale;

            mSupportLegacyQuirks = supportsLegacyQuirks;
        }
        // Defer initializing the native side until a native WebContents instance is set.
    }

    @CalledByNative
    private void nativeAwSettingsGone(long nativeAwSettings) {
        assert mNativeAwSettings != 0 && mNativeAwSettings == nativeAwSettings;
        mNativeAwSettings = 0;
    }

    @CalledByNative
    private double getDIPScaleLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mDIPScale;
    }

    void setDIPScale(double dipScale) {
        synchronized (mAwSettingsLock) {
            mDIPScale = dipScale;
            // TODO(joth): This should also be synced over to native side, but right now
            // the setDIPScale call is always followed by a setWebContents() which covers this.
        }
    }

    void setZoomListener(ZoomSupportChangeListener zoomChangeListener) {
        synchronized (mAwSettingsLock) {
            mZoomChangeListener = zoomChangeListener;
        }
    }

    void setWebContents(long nativeWebContents) {
        synchronized (mAwSettingsLock) {
            if (mNativeAwSettings != 0) {
                nativeDestroy(mNativeAwSettings);
                assert mNativeAwSettings == 0;  // nativeAwSettingsGone should have been called.
            }
            if (nativeWebContents != 0) {
                mEventHandler.bindUiThread();
                mNativeAwSettings = nativeInit(nativeWebContents);
                nativeUpdateEverythingLocked(mNativeAwSettings);
                onGestureZoomSupportChanged(
                        supportsDoubleTapZoomLocked(), supportsMultiTouchZoomLocked());
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setBlockNetworkLoads}.
     */
    public void setBlockNetworkLoads(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (!flag && !mHasInternetPermission) {
                throw new SecurityException("Permission denied - " +
                        "application missing INTERNET permission");
            }
            mBlockNetworkLoads = flag;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getBlockNetworkLoads}.
     */
    public boolean getBlockNetworkLoads() {
        synchronized (mAwSettingsLock) {
            return mBlockNetworkLoads;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setAllowFileAccess}.
     */
    public void setAllowFileAccess(boolean allow) {
        synchronized (mAwSettingsLock) {
            if (mAllowFileUrlAccess != allow) {
                mAllowFileUrlAccess = allow;
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getAllowFileAccess}.
     */
    public boolean getAllowFileAccess() {
        synchronized (mAwSettingsLock) {
            return mAllowFileUrlAccess;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setAllowContentAccess}.
     */
    public void setAllowContentAccess(boolean allow) {
        synchronized (mAwSettingsLock) {
            if (mAllowContentUrlAccess != allow) {
                mAllowContentUrlAccess = allow;
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getAllowContentAccess}.
     */
    public boolean getAllowContentAccess() {
        synchronized (mAwSettingsLock) {
            return mAllowContentUrlAccess;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setCacheMode}.
     */
    public void setCacheMode(int mode) {
        synchronized (mAwSettingsLock) {
            if (mCacheMode != mode) {
                mCacheMode = mode;
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getCacheMode}.
     */
    public int getCacheMode() {
        synchronized (mAwSettingsLock) {
            return mCacheMode;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setNeedInitialFocus}.
     */
    public void setShouldFocusFirstNode(boolean flag) {
        synchronized (mAwSettingsLock) {
            mShouldFocusFirstNode = flag;
        }
    }

    /**
     * See {@link android.webkit.WebView#setInitialScale}.
     */
    public void setInitialPageScale(final float scaleInPercent) {
        synchronized (mAwSettingsLock) {
            if (mInitialPageScalePercent != scaleInPercent) {
                mInitialPageScalePercent = scaleInPercent;
                mEventHandler.runOnUiThreadBlockingAndLocked(new Runnable() {
                    @Override
                    public void run() {
                        nativeUpdateInitialPageScaleLocked(mNativeAwSettings);
                    }
                });
            }
        }
    }

    @CalledByNative
    private float getInitialPageScalePercentLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mInitialPageScalePercent;
    }

    void setSpatialNavigationEnabled(boolean enable) {
        synchronized (mAwSettingsLock) {
            if (mSpatialNavigationEnabled != enable) {
                mSpatialNavigationEnabled = enable;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    @CalledByNative
    private boolean getSpatialNavigationLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mSpatialNavigationEnabled;
    }

    void setEnableSupportedHardwareAcceleratedFeatures(boolean enable) {
        synchronized (mAwSettingsLock) {
            if (mEnableSupportedHardwareAcceleratedFeatures != enable) {
                mEnableSupportedHardwareAcceleratedFeatures = enable;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    @CalledByNative
    private boolean getEnableSupportedHardwareAcceleratedFeaturesLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mEnableSupportedHardwareAcceleratedFeatures;
    }

    /**
     * See {@link android.webkit.WebSettings#setNeedInitialFocus}.
     */
    public boolean shouldFocusFirstNode() {
        synchronized (mAwSettingsLock) {
            return mShouldFocusFirstNode;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setGeolocationEnabled}.
     */
    public void setGeolocationEnabled(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mGeolocationEnabled != flag) {
                mGeolocationEnabled = flag;
            }
        }
    }

    /**
     * @return Returns if geolocation is currently enabled.
     */
    boolean getGeolocationEnabled() {
        synchronized (mAwSettingsLock) {
            return mGeolocationEnabled;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setSaveFormData}.
     */
    public void setSaveFormData(final boolean enable) {
        synchronized (mAwSettingsLock) {
            if (mAutoCompleteEnabled != enable) {
                mAutoCompleteEnabled = enable;
                mEventHandler.runOnUiThreadBlockingAndLocked(new Runnable() {
                    @Override
                    public void run() {
                        nativeUpdateFormDataPreferencesLocked(mNativeAwSettings);
                    }
                });
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getSaveFormData}.
     */
    public boolean getSaveFormData() {
        synchronized (mAwSettingsLock) {
            return getSaveFormDataLocked();
        }
    }

    @CalledByNative
    private boolean getSaveFormDataLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mAutoCompleteEnabled;
    }

    /**
     * @returns the default User-Agent used by each ContentViewCore instance, i.e. unless
     * overridden by {@link #setUserAgentString()}
     */
    public static String getDefaultUserAgent() {
        return LazyDefaultUserAgent.sInstance;
    }

    /**
     * See {@link android.webkit.WebSettings#setUserAgentString}.
     */
    public void setUserAgentString(String ua) {
        synchronized (mAwSettingsLock) {
            final String oldUserAgent = mUserAgent;
            if (ua == null || ua.length() == 0) {
                mUserAgent = LazyDefaultUserAgent.sInstance;
            } else {
                mUserAgent = ua;
            }
            if (!oldUserAgent.equals(mUserAgent)) {
                mEventHandler.runOnUiThreadBlockingAndLocked(new Runnable() {
                    @Override
                    public void run() {
                        nativeUpdateUserAgentLocked(mNativeAwSettings);
                    }
                });
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getUserAgentString}.
     */
    public String getUserAgentString() {
        synchronized (mAwSettingsLock) {
            return mUserAgent;
        }
    }

    @CalledByNative
    private String getUserAgentLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mUserAgent;
    }

    /**
     * See {@link android.webkit.WebSettings#setLoadWithOverviewMode}.
     */
    public void setLoadWithOverviewMode(boolean overview) {
        synchronized (mAwSettingsLock) {
            if (mLoadWithOverviewMode != overview) {
                mLoadWithOverviewMode = overview;
                mEventHandler.runOnUiThreadBlockingAndLocked(new Runnable() {
                    @Override
                    public void run() {
                        updateWebkitPreferencesOnUiThreadLocked();
                        nativeResetScrollAndScaleState(mNativeAwSettings);
                    }
                });
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getLoadWithOverviewMode}.
     */
    public boolean getLoadWithOverviewMode() {
        synchronized (mAwSettingsLock) {
            return mLoadWithOverviewMode;
        }
    }

    @CalledByNative
    private boolean getLoadWithOverviewModeLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mLoadWithOverviewMode;
    }

    /**
     * See {@link android.webkit.WebSettings#setTextZoom}.
     */
    public void setTextZoom(final int textZoom) {
        synchronized (mAwSettingsLock) {
            if (mTextSizePercent != textZoom) {
                mTextSizePercent = textZoom;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getTextZoom}.
     */
    public int getTextZoom() {
        synchronized (mAwSettingsLock) {
            return mTextSizePercent;
        }
    }

    @CalledByNative
    private int getTextSizePercentLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mTextSizePercent;
    }

    /**
     * See {@link android.webkit.WebSettings#setStandardFontFamily}.
     */
    public void setStandardFontFamily(String font) {
        synchronized (mAwSettingsLock) {
            if (font != null && !mStandardFontFamily.equals(font)) {
                mStandardFontFamily = font;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getStandardFontFamily}.
     */
    public String getStandardFontFamily() {
        synchronized (mAwSettingsLock) {
            return mStandardFontFamily;
        }
    }

    @CalledByNative
    private String getStandardFontFamilyLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mStandardFontFamily;
    }

    /**
     * See {@link android.webkit.WebSettings#setFixedFontFamily}.
     */
    public void setFixedFontFamily(String font) {
        synchronized (mAwSettingsLock) {
            if (font != null && !mFixedFontFamily.equals(font)) {
                mFixedFontFamily = font;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getFixedFontFamily}.
     */
    public String getFixedFontFamily() {
        synchronized (mAwSettingsLock) {
            return mFixedFontFamily;
        }
    }

    @CalledByNative
    private String getFixedFontFamilyLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mFixedFontFamily;
    }

    /**
     * See {@link android.webkit.WebSettings#setSansSerifFontFamily}.
     */
    public void setSansSerifFontFamily(String font) {
        synchronized (mAwSettingsLock) {
            if (font != null && !mSansSerifFontFamily.equals(font)) {
                mSansSerifFontFamily = font;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getSansSerifFontFamily}.
     */
    public String getSansSerifFontFamily() {
        synchronized (mAwSettingsLock) {
            return mSansSerifFontFamily;
        }
    }

    @CalledByNative
    private String getSansSerifFontFamilyLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mSansSerifFontFamily;
    }

    /**
     * See {@link android.webkit.WebSettings#setSerifFontFamily}.
     */
    public void setSerifFontFamily(String font) {
        synchronized (mAwSettingsLock) {
            if (font != null && !mSerifFontFamily.equals(font)) {
                mSerifFontFamily = font;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getSerifFontFamily}.
     */
    public String getSerifFontFamily() {
        synchronized (mAwSettingsLock) {
            return mSerifFontFamily;
        }
    }

    @CalledByNative
    private String getSerifFontFamilyLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mSerifFontFamily;
    }

    /**
     * See {@link android.webkit.WebSettings#setCursiveFontFamily}.
     */
    public void setCursiveFontFamily(String font) {
        synchronized (mAwSettingsLock) {
            if (font != null && !mCursiveFontFamily.equals(font)) {
                mCursiveFontFamily = font;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getCursiveFontFamily}.
     */
    public String getCursiveFontFamily() {
        synchronized (mAwSettingsLock) {
            return mCursiveFontFamily;
        }
    }

    @CalledByNative
    private String getCursiveFontFamilyLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mCursiveFontFamily;
    }

    /**
     * See {@link android.webkit.WebSettings#setFantasyFontFamily}.
     */
    public void setFantasyFontFamily(String font) {
        synchronized (mAwSettingsLock) {
            if (font != null && !mFantasyFontFamily.equals(font)) {
                mFantasyFontFamily = font;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getFantasyFontFamily}.
     */
    public String getFantasyFontFamily() {
        synchronized (mAwSettingsLock) {
            return mFantasyFontFamily;
        }
    }

    @CalledByNative
    private String getFantasyFontFamilyLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mFantasyFontFamily;
    }

    /**
     * See {@link android.webkit.WebSettings#setMinimumFontSize}.
     */
    public void setMinimumFontSize(int size) {
        synchronized (mAwSettingsLock) {
            size = clipFontSize(size);
            if (mMinimumFontSize != size) {
                mMinimumFontSize = size;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getMinimumFontSize}.
     */
    public int getMinimumFontSize() {
        synchronized (mAwSettingsLock) {
            return mMinimumFontSize;
        }
    }

    @CalledByNative
    private int getMinimumFontSizeLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mMinimumFontSize;
    }

    /**
     * See {@link android.webkit.WebSettings#setMinimumLogicalFontSize}.
     */
    public void setMinimumLogicalFontSize(int size) {
        synchronized (mAwSettingsLock) {
            size = clipFontSize(size);
            if (mMinimumLogicalFontSize != size) {
                mMinimumLogicalFontSize = size;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getMinimumLogicalFontSize}.
     */
    public int getMinimumLogicalFontSize() {
        synchronized (mAwSettingsLock) {
            return mMinimumLogicalFontSize;
        }
    }

    @CalledByNative
    private int getMinimumLogicalFontSizeLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mMinimumLogicalFontSize;
    }

    /**
     * See {@link android.webkit.WebSettings#setDefaultFontSize}.
     */
    public void setDefaultFontSize(int size) {
        synchronized (mAwSettingsLock) {
            size = clipFontSize(size);
            if (mDefaultFontSize != size) {
                mDefaultFontSize = size;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getDefaultFontSize}.
     */
    public int getDefaultFontSize() {
        synchronized (mAwSettingsLock) {
            return mDefaultFontSize;
        }
    }

    @CalledByNative
    private int getDefaultFontSizeLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mDefaultFontSize;
    }

    /**
     * See {@link android.webkit.WebSettings#setDefaultFixedFontSize}.
     */
    public void setDefaultFixedFontSize(int size) {
        synchronized (mAwSettingsLock) {
            size = clipFontSize(size);
            if (mDefaultFixedFontSize != size) {
                mDefaultFixedFontSize = size;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getDefaultFixedFontSize}.
     */
    public int getDefaultFixedFontSize() {
        synchronized (mAwSettingsLock) {
            return mDefaultFixedFontSize;
        }
    }

    @CalledByNative
    private int getDefaultFixedFontSizeLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mDefaultFixedFontSize;
    }

    /**
     * See {@link android.webkit.WebSettings#setJavaScriptEnabled}.
     */
    public void setJavaScriptEnabled(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mJavaScriptEnabled != flag) {
                mJavaScriptEnabled = flag;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setAllowUniversalAccessFromFileURLs}.
     */
    public void setAllowUniversalAccessFromFileURLs(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mAllowUniversalAccessFromFileURLs != flag) {
                mAllowUniversalAccessFromFileURLs = flag;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setAllowFileAccessFromFileURLs}.
     */
    public void setAllowFileAccessFromFileURLs(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mAllowFileAccessFromFileURLs != flag) {
                mAllowFileAccessFromFileURLs = flag;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setLoadsImagesAutomatically}.
     */
    public void setLoadsImagesAutomatically(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mLoadsImagesAutomatically != flag) {
                mLoadsImagesAutomatically = flag;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getLoadsImagesAutomatically}.
     */
    public boolean getLoadsImagesAutomatically() {
        synchronized (mAwSettingsLock) {
            return mLoadsImagesAutomatically;
        }
    }

    @CalledByNative
    private boolean getLoadsImagesAutomaticallyLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mLoadsImagesAutomatically;
    }

    /**
     * See {@link android.webkit.WebSettings#setImagesEnabled}.
     */
    public void setImagesEnabled(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mImagesEnabled != flag) {
                mImagesEnabled = flag;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getImagesEnabled}.
     */
    public boolean getImagesEnabled() {
        synchronized (mAwSettingsLock) {
            return mImagesEnabled;
        }
    }

    @CalledByNative
    private boolean getImagesEnabledLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mImagesEnabled;
    }

    /**
     * See {@link android.webkit.WebSettings#getJavaScriptEnabled}.
     */
    public boolean getJavaScriptEnabled() {
        synchronized (mAwSettingsLock) {
            return mJavaScriptEnabled;
        }
    }

    @CalledByNative
    private boolean getJavaScriptEnabledLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mJavaScriptEnabled;
    }

    /**
     * See {@link android.webkit.WebSettings#getAllowUniversalAccessFromFileURLs}.
     */
    public boolean getAllowUniversalAccessFromFileURLs() {
        synchronized (mAwSettingsLock) {
            return mAllowUniversalAccessFromFileURLs;
        }
    }

    @CalledByNative
    private boolean getAllowUniversalAccessFromFileURLsLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mAllowUniversalAccessFromFileURLs;
    }

    /**
     * See {@link android.webkit.WebSettings#getAllowFileAccessFromFileURLs}.
     */
    public boolean getAllowFileAccessFromFileURLs() {
        synchronized (mAwSettingsLock) {
            return mAllowFileAccessFromFileURLs;
        }
    }

    @CalledByNative
    private boolean getAllowFileAccessFromFileURLsLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mAllowFileAccessFromFileURLs;
    }

    /**
     * See {@link android.webkit.WebSettings#setPluginsEnabled}.
     */
    public void setPluginsEnabled(boolean flag) {
        setPluginState(flag ? PluginState.ON : PluginState.OFF);
    }

    /**
     * See {@link android.webkit.WebSettings#setPluginState}.
     */
    public void setPluginState(PluginState state) {
        synchronized (mAwSettingsLock) {
            if (mPluginState != state) {
                mPluginState = state;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getPluginsEnabled}.
     */
    public boolean getPluginsEnabled() {
        synchronized (mAwSettingsLock) {
            return mPluginState == PluginState.ON;
        }
    }

    /**
     * Return true if plugins are disabled.
     * @return True if plugins are disabled.
     */
    @CalledByNative
    private boolean getPluginsDisabledLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mPluginState == PluginState.OFF;
    }

    /**
     * See {@link android.webkit.WebSettings#getPluginState}.
     */
    public PluginState getPluginState() {
        synchronized (mAwSettingsLock) {
            return mPluginState;
        }
    }


    /**
     * See {@link android.webkit.WebSettings#setJavaScriptCanOpenWindowsAutomatically}.
     */
    public void setJavaScriptCanOpenWindowsAutomatically(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mJavaScriptCanOpenWindowsAutomatically != flag) {
                mJavaScriptCanOpenWindowsAutomatically = flag;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getJavaScriptCanOpenWindowsAutomatically}.
     */
    public boolean getJavaScriptCanOpenWindowsAutomatically() {
        synchronized (mAwSettingsLock) {
            return mJavaScriptCanOpenWindowsAutomatically;
        }
    }

    @CalledByNative
    private boolean getJavaScriptCanOpenWindowsAutomaticallyLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mJavaScriptCanOpenWindowsAutomatically;
    }

    /**
     * See {@link android.webkit.WebSettings#setLayoutAlgorithm}.
     */
    public void setLayoutAlgorithm(LayoutAlgorithm l) {
        synchronized (mAwSettingsLock) {
            if (mLayoutAlgorithm != l) {
                mLayoutAlgorithm = l;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getLayoutAlgorithm}.
     */
    public LayoutAlgorithm getLayoutAlgorithm() {
        synchronized (mAwSettingsLock) {
            return mLayoutAlgorithm;
        }
    }

    /**
     * Gets whether Text Auto-sizing layout algorithm is enabled.
     *
     * @return true if Text Auto-sizing layout algorithm is enabled
     */
    @CalledByNative
    private boolean getTextAutosizingEnabledLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mLayoutAlgorithm == LayoutAlgorithm.TEXT_AUTOSIZING;
    }

    /**
     * See {@link android.webkit.WebSettings#setSupportMultipleWindows}.
     */
    public void setSupportMultipleWindows(boolean support) {
        synchronized (mAwSettingsLock) {
            if (mSupportMultipleWindows != support) {
                mSupportMultipleWindows = support;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#supportMultipleWindows}.
     */
    public boolean supportMultipleWindows() {
        synchronized (mAwSettingsLock) {
            return mSupportMultipleWindows;
        }
    }

    @CalledByNative
    private boolean getSupportMultipleWindowsLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mSupportMultipleWindows;
    }

    @CalledByNative
    private boolean getSupportLegacyQuirksLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mSupportLegacyQuirks;
    }

    /**
     * See {@link android.webkit.WebSettings#setUseWideViewPort}.
     */
    public void setUseWideViewPort(boolean use) {
        synchronized (mAwSettingsLock) {
            if (mUseWideViewport != use) {
                mUseWideViewport = use;
                onGestureZoomSupportChanged(
                        supportsDoubleTapZoomLocked(), supportsMultiTouchZoomLocked());
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getUseWideViewPort}.
     */
    public boolean getUseWideViewPort() {
        synchronized (mAwSettingsLock) {
            return mUseWideViewport;
        }
    }

    @CalledByNative
    private boolean getUseWideViewportLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mUseWideViewport;
    }

    @CalledByNative
    private boolean getPasswordEchoEnabledLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mPasswordEchoEnabled;
    }

    /**
     * See {@link android.webkit.WebSettings#setAppCacheEnabled}.
     */
    public void setAppCacheEnabled(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mAppCacheEnabled != flag) {
                mAppCacheEnabled = flag;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setAppCachePath}.
     */
    public void setAppCachePath(String path) {
        boolean needToSync = false;
        synchronized (sGlobalContentSettingsLock) {
            // AppCachePath can only be set once.
            if (!sAppCachePathIsSet && path != null && !path.isEmpty()) {
                sAppCachePathIsSet = true;
                needToSync = true;
            }
        }
        // The obvious problem here is that other WebViews will not be updated,
        // until they execute synchronization from Java to the native side.
        // But this is the same behaviour as it was in the legacy WebView.
        if (needToSync) {
            synchronized (mAwSettingsLock) {
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * Gets whether Application Cache is enabled.
     *
     * @return true if Application Cache is enabled
     */
    @CalledByNative
    private boolean getAppCacheEnabledLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        if (!mAppCacheEnabled) {
            return false;
        }
        synchronized (sGlobalContentSettingsLock) {
            return sAppCachePathIsSet;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setDomStorageEnabled}.
     */
    public void setDomStorageEnabled(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mDomStorageEnabled != flag) {
                mDomStorageEnabled = flag;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getDomStorageEnabled}.
     */
    public boolean getDomStorageEnabled() {
        synchronized (mAwSettingsLock) {
            return mDomStorageEnabled;
        }
    }

    @CalledByNative
    private boolean getDomStorageEnabledLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mDomStorageEnabled;
    }

    /**
     * See {@link android.webkit.WebSettings#setDatabaseEnabled}.
     */
    public void setDatabaseEnabled(boolean flag) {
        synchronized (mAwSettingsLock) {
            if (mDatabaseEnabled != flag) {
                mDatabaseEnabled = flag;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getDatabaseEnabled}.
     */
    public boolean getDatabaseEnabled() {
        synchronized (mAwSettingsLock) {
            return mDatabaseEnabled;
        }
    }

    @CalledByNative
    private boolean getDatabaseEnabledLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mDatabaseEnabled;
    }

    /**
     * See {@link android.webkit.WebSettings#setDefaultTextEncodingName}.
     */
    public void setDefaultTextEncodingName(String encoding) {
        synchronized (mAwSettingsLock) {
            if (encoding != null && !mDefaultTextEncoding.equals(encoding)) {
                mDefaultTextEncoding = encoding;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getDefaultTextEncodingName}.
     */
    public String getDefaultTextEncodingName() {
        synchronized (mAwSettingsLock) {
            return mDefaultTextEncoding;
        }
    }

    @CalledByNative
    private String getDefaultTextEncodingLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mDefaultTextEncoding;
    }

    /**
     * See {@link android.webkit.WebSettings#setMediaPlaybackRequiresUserGesture}.
     */
    public void setMediaPlaybackRequiresUserGesture(boolean require) {
        synchronized (mAwSettingsLock) {
            if (mMediaPlaybackRequiresUserGesture != require) {
                mMediaPlaybackRequiresUserGesture = require;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getMediaPlaybackRequiresUserGesture}.
     */
    public boolean getMediaPlaybackRequiresUserGesture() {
        synchronized (mAwSettingsLock) {
            return mMediaPlaybackRequiresUserGesture;
        }
    }

    @CalledByNative
    private boolean getMediaPlaybackRequiresUserGestureLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mMediaPlaybackRequiresUserGesture;
    }

    /**
     * See {@link android.webkit.WebSettings#setDefaultVideoPosterURL}.
     */
    public void setDefaultVideoPosterURL(String url) {
        synchronized (mAwSettingsLock) {
            if (mDefaultVideoPosterURL != null && !mDefaultVideoPosterURL.equals(url) ||
                    mDefaultVideoPosterURL == null && url != null) {
                mDefaultVideoPosterURL = url;
                mEventHandler.updateWebkitPreferencesLocked();
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getDefaultVideoPosterURL}.
     */
    public String getDefaultVideoPosterURL() {
        synchronized (mAwSettingsLock) {
            return mDefaultVideoPosterURL;
        }
    }

    @CalledByNative
    private String getDefaultVideoPosterURLLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mDefaultVideoPosterURL;
    }

    private void onGestureZoomSupportChanged(
            final boolean supportsDoubleTapZoom, final boolean supportsMultiTouchZoom) {
        // Always post asynchronously here, to avoid doubling back onto the caller.
        mEventHandler.maybePostOnUiThread(new Runnable() {
            @Override
            public void run() {
                synchronized (mAwSettingsLock) {
                    if (mZoomChangeListener != null) {
                        mZoomChangeListener.onGestureZoomSupportChanged(
                                supportsDoubleTapZoom, supportsMultiTouchZoom);
                    }
                }
            }
        });
    }

    /**
     * See {@link android.webkit.WebSettings#setSupportZoom}.
     */
    public void setSupportZoom(boolean support) {
        synchronized (mAwSettingsLock) {
            if (mSupportZoom != support) {
                mSupportZoom = support;
                onGestureZoomSupportChanged(
                        supportsDoubleTapZoomLocked(), supportsMultiTouchZoomLocked());
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#supportZoom}.
     */
    public boolean supportZoom() {
        synchronized (mAwSettingsLock) {
            return mSupportZoom;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setBuiltInZoomControls}.
     */
    public void setBuiltInZoomControls(boolean enabled) {
        synchronized (mAwSettingsLock) {
            if (mBuiltInZoomControls != enabled) {
                mBuiltInZoomControls = enabled;
                onGestureZoomSupportChanged(
                        supportsDoubleTapZoomLocked(), supportsMultiTouchZoomLocked());
            }
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getBuiltInZoomControls}.
     */
    public boolean getBuiltInZoomControls() {
        synchronized (mAwSettingsLock) {
            return mBuiltInZoomControls;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#setDisplayZoomControls}.
     */
    public void setDisplayZoomControls(boolean enabled) {
        synchronized (mAwSettingsLock) {
            mDisplayZoomControls = enabled;
        }
    }

    /**
     * See {@link android.webkit.WebSettings#getDisplayZoomControls}.
     */
    public boolean getDisplayZoomControls() {
        synchronized (mAwSettingsLock) {
            return mDisplayZoomControls;
        }
    }

    @CalledByNative
    private boolean supportsDoubleTapZoomLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mSupportZoom && mBuiltInZoomControls && mUseWideViewport;
    }

    private boolean supportsMultiTouchZoomLocked() {
        assert Thread.holdsLock(mAwSettingsLock);
        return mSupportZoom && mBuiltInZoomControls;
    }

    boolean supportsMultiTouchZoom() {
        synchronized (mAwSettingsLock) {
            return supportsMultiTouchZoomLocked();
        }
    }

    boolean shouldDisplayZoomControls() {
        synchronized (mAwSettingsLock) {
            return supportsMultiTouchZoomLocked() && mDisplayZoomControls;
        }
    }

    private int clipFontSize(int size) {
        if (size < MINIMUM_FONT_SIZE) {
            return MINIMUM_FONT_SIZE;
        } else if (size > MAXIMUM_FONT_SIZE) {
            return MAXIMUM_FONT_SIZE;
        }
        return size;
    }

    @CalledByNative
    private void updateEverything() {
        synchronized (mAwSettingsLock) {
            nativeUpdateEverythingLocked(mNativeAwSettings);
        }
    }

    @CalledByNative
    private void populateWebPreferences(long webPrefsPtr) {
        synchronized (mAwSettingsLock) {
            nativePopulateWebPreferencesLocked(mNativeAwSettings, webPrefsPtr);
        }
    }

    private void updateWebkitPreferencesOnUiThreadLocked() {
        assert mEventHandler.mHandler != null;
        ThreadUtils.assertOnUiThread();
        nativeUpdateWebkitPreferencesLocked(mNativeAwSettings);
    }

    private native long nativeInit(long webContentsPtr);

    private native void nativeDestroy(long nativeAwSettings);

    private native void nativePopulateWebPreferencesLocked(long nativeAwSettings, long webPrefsPtr);

    private native void nativeResetScrollAndScaleState(long nativeAwSettings);

    private native void nativeUpdateEverythingLocked(long nativeAwSettings);

    private native void nativeUpdateInitialPageScaleLocked(long nativeAwSettings);

    private native void nativeUpdateUserAgentLocked(long nativeAwSettings);

    private native void nativeUpdateWebkitPreferencesLocked(long nativeAwSettings);

    private static native String nativeGetDefaultUserAgent();

    private native void nativeUpdateFormDataPreferencesLocked(long nativeAwSettings);
}