/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
 *
 * 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 com.android.ide.eclipse.adt.internal.preferences;


import com.android.annotations.NonNull;
import com.android.ide.common.xml.XmlAttributeSortOrder;
import com.android.ide.eclipse.adt.AdtPlugin;
import com.android.ide.eclipse.adt.internal.editors.AndroidXmlEditor;
import com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderPreviewMode;
import com.android.prefs.AndroidLocation.AndroidLocationException;
import com.android.sdklib.internal.build.DebugKeyProvider;
import com.android.sdklib.internal.build.DebugKeyProvider.KeytoolException;
import com.android.sdkstats.DdmsPreferenceStore;

import org.eclipse.core.runtime.preferences.AbstractPreferenceInitializer;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.util.PropertyChangeEvent;

import java.io.File;
import java.util.Locale;

public final class AdtPrefs extends AbstractPreferenceInitializer {
    public final static String PREFS_SDK_DIR = AdtPlugin.PLUGIN_ID + ".sdk"; //$NON-NLS-1$

    public final static String PREFS_BUILD_RES_AUTO_REFRESH = AdtPlugin.PLUGIN_ID + ".resAutoRefresh"; //$NON-NLS-1$

    public final static String PREFS_BUILD_FORCE_ERROR_ON_NATIVELIB_IN_JAR = AdtPlugin.PLUGIN_ID + ".forceErrorNativeLibInJar"; //$NON-NLS-1$

    public final static String PREFS_BUILD_SKIP_POST_COMPILE_ON_FILE_SAVE = AdtPlugin.PLUGIN_ID + ".skipPostCompileOnFileSave"; //$NON-NLS-1$

    public final static String PREFS_BUILD_VERBOSITY = AdtPlugin.PLUGIN_ID + ".buildVerbosity"; //$NON-NLS-1$

    public final static String PREFS_DEFAULT_DEBUG_KEYSTORE = AdtPlugin.PLUGIN_ID + ".defaultDebugKeyStore"; //$NON-NLS-1$

    public final static String PREFS_CUSTOM_DEBUG_KEYSTORE = AdtPlugin.PLUGIN_ID + ".customDebugKeyStore"; //$NON-NLS-1$

    public final static String PREFS_HOME_PACKAGE = AdtPlugin.PLUGIN_ID + ".homePackage"; //$NON-NLS-1$

    public final static String PREFS_EMU_OPTIONS = AdtPlugin.PLUGIN_ID + ".emuOptions"; //$NON-NLS-1$

    public final static String PREFS_MONITOR_DENSITY = AdtPlugin.PLUGIN_ID + ".monitorDensity"; //$NON-NLS-1$

    public final static String PREFS_FORMAT_GUI_XML = AdtPlugin.PLUGIN_ID + ".formatXml"; //$NON-NLS-1$
    public final static String PREFS_PREFER_XML = AdtPlugin.PLUGIN_ID + ".xmlEditor"; //$NON-NLS-1$
    public final static String PREFS_USE_CUSTOM_XML_FORMATTER = AdtPlugin.PLUGIN_ID + ".androidForm"; //$NON-NLS-1$

    public final static String PREFS_PALETTE_MODE = AdtPlugin.PLUGIN_ID + ".palette"; //$NON-NLS-1$

    public final static String PREFS_USE_ECLIPSE_INDENT = AdtPlugin.PLUGIN_ID + ".eclipseIndent"; //$NON-NLS-1$
    public final static String PREVS_REMOVE_EMPTY_LINES = AdtPlugin.PLUGIN_ID + ".removeEmpty"; //$NON-NLS-1$
    public final static String PREFS_ONE_ATTR_PER_LINE = AdtPlugin.PLUGIN_ID + ".oneAttrPerLine"; //$NON-NLS-1$
    public final static String PREFS_SPACE_BEFORE_CLOSE = AdtPlugin.PLUGIN_ID + ".spaceBeforeClose"; //$NON-NLS-1$
    public final static String PREFS_FORMAT_ON_SAVE = AdtPlugin.PLUGIN_ID + ".formatOnSave"; //$NON-NLS-1$
    public final static String PREFS_LINT_ON_SAVE = AdtPlugin.PLUGIN_ID + ".lintOnSave"; //$NON-NLS-1$
    public final static String PREFS_LINT_ON_EXPORT = AdtPlugin.PLUGIN_ID + ".lintOnExport"; //$NON-NLS-1$
    public final static String PREFS_ATTRIBUTE_SORT = AdtPlugin.PLUGIN_ID + ".attrSort"; //$NON-NLS-1$
    public final static String PREFS_LINT_SEVERITIES = AdtPlugin.PLUGIN_ID + ".lintSeverities"; //$NON-NLS-1$
    public final static String PREFS_FIX_LEGACY_EDITORS = AdtPlugin.PLUGIN_ID + ".fixLegacyEditors"; //$NON-NLS-1$
    public final static String PREFS_SHARED_LAYOUT_EDITOR = AdtPlugin.PLUGIN_ID + ".sharedLayoutEditor"; //$NON-NLS-1$
    public final static String PREFS_PREVIEWS = AdtPlugin.PLUGIN_ID + ".previews"; //$NON-NLS-1$
    public final static String PREFS_SKIP_LINT_LIBS = AdtPlugin.PLUGIN_ID + ".skipLintLibs"; //$NON-NLS-1$
    public final static String PREFS_AUTO_PICK_TARGET = AdtPlugin.PLUGIN_ID + ".autoPickTarget"; //$NON-NLS-1$
    public final static String PREFS_REFACTOR_IDS = AdtPlugin.PLUGIN_ID + ".refactorIds"; //$NON-NLS-1$

    /** singleton instance */
    private final static AdtPrefs sThis = new AdtPrefs();

    /** default store, provided by eclipse */
    private IPreferenceStore mStore;

    /** cached location for the sdk folder */
    private String mOsSdkLocation;

    /** Verbosity of the build */
    private BuildVerbosity mBuildVerbosity = BuildVerbosity.NORMAL;

    private boolean mBuildForceResResfresh = false;
    private boolean mBuildForceErrorOnNativeLibInJar = true;
    private boolean mBuildSkipPostCompileOnFileSave = true;
    private float mMonitorDensity = 0.f;
    private String mPalette;

    private boolean mFormatGuiXml;
    private boolean mCustomXmlFormatter;
    private boolean mUseEclipseIndent;
    private boolean mRemoveEmptyLines;
    private boolean mOneAttributeOnFirstLine;
    private boolean mSpaceBeforeClose;
    private boolean mFormatOnSave;
    private boolean mLintOnSave;
    private boolean mLintOnExport;
    private XmlAttributeSortOrder mAttributeSort;
    private boolean mSharedLayoutEditor;
    private boolean mAutoPickTarget;
    private RenderPreviewMode mPreviewMode = RenderPreviewMode.NONE;
    private int mPreferXmlEditor;
    private boolean mSkipLibrariesFromLint;

    public static enum BuildVerbosity {
        /** Build verbosity "Always". Those messages are always displayed, even in silent mode */
        ALWAYS(0),
        /** Build verbosity level "Normal" */
        NORMAL(1),
        /** Build verbosity level "Verbose". Those messages are only displayed in verbose mode */
        VERBOSE(2);

        private int mLevel;

        BuildVerbosity(int level) {
            mLevel = level;
        }

        public int getLevel() {
            return mLevel;
        }

        /**
         * Finds and returns a {@link BuildVerbosity} whose {@link #name()} matches a given name.
         * <p/>This is different from {@link Enum#valueOf(Class, String)} in that it returns null
         * if no matches are found.
         *
         * @param name the name to look up.
         * @return returns the matching enum or null of no match where found.
         */
        public static BuildVerbosity find(String name) {
            for (BuildVerbosity v : values()) {
                if (v.name().equals(name)) {
                    return v;
                }
            }

            return null;
        }
    }

    public static void init(IPreferenceStore preferenceStore) {
        sThis.mStore = preferenceStore;
    }

    public static AdtPrefs getPrefs() {
        return sThis;
    }

    public synchronized void loadValues(PropertyChangeEvent event) {
        // get the name of the property that changed, if any
        String property = event != null ? event.getProperty() : null;

        if (property == null || PREFS_SDK_DIR.equals(property)) {
            mOsSdkLocation = mStore.getString(PREFS_SDK_DIR);

            // Make it possible to override the SDK path using an environment variable.
            // The value will only be used if it matches an existing directory.
            // Useful for testing from Eclipse.
            // Note: this is a hack that does not change the preferences, so if the user
            // looks at Window > Preferences > Android, the path will be the preferences
            // one and not the overridden one.
            String override = System.getenv("ADT_TEST_SDK_PATH");   //$NON-NLS-1$
            if (override != null && override.length() > 0 && new File(override).isDirectory()) {
                mOsSdkLocation = override;
            }

            // make sure it ends with a separator. Normally this is done when the preference
            // is set. But to make sure older version still work, we fix it here as well.
            if (mOsSdkLocation.length() > 0 && mOsSdkLocation.endsWith(File.separator) == false) {
                mOsSdkLocation = mOsSdkLocation + File.separator;
            }
        }

        if (property == null || PREFS_BUILD_VERBOSITY.equals(property)) {
            mBuildVerbosity = BuildVerbosity.find(mStore.getString(PREFS_BUILD_VERBOSITY));
            if (mBuildVerbosity == null) {
                mBuildVerbosity = BuildVerbosity.NORMAL;
            }
        }

        if (property == null || PREFS_BUILD_RES_AUTO_REFRESH.equals(property)) {
            mBuildForceResResfresh = mStore.getBoolean(PREFS_BUILD_RES_AUTO_REFRESH);
        }

        if (property == null || PREFS_BUILD_FORCE_ERROR_ON_NATIVELIB_IN_JAR.equals(property)) {
            mBuildForceErrorOnNativeLibInJar =
                    mStore.getBoolean(PREFS_BUILD_FORCE_ERROR_ON_NATIVELIB_IN_JAR);
        }

        if (property == null || PREFS_BUILD_SKIP_POST_COMPILE_ON_FILE_SAVE.equals(property)) {
            mBuildSkipPostCompileOnFileSave =
                mStore.getBoolean(PREFS_BUILD_SKIP_POST_COMPILE_ON_FILE_SAVE);
        }

        if (property == null || PREFS_MONITOR_DENSITY.equals(property)) {
            mMonitorDensity = mStore.getFloat(PREFS_MONITOR_DENSITY);
        }

        if (property == null || PREFS_FORMAT_GUI_XML.equals(property)) {
            mFormatGuiXml = mStore.getBoolean(PREFS_FORMAT_GUI_XML);
        }

        if (property == null || PREFS_PREFER_XML.equals(property)) {
            mPreferXmlEditor = mStore.getInt(PREFS_PREFER_XML);
        }

        if (property == null || PREFS_USE_CUSTOM_XML_FORMATTER.equals(property)) {
            mCustomXmlFormatter = mStore.getBoolean(PREFS_USE_CUSTOM_XML_FORMATTER);
        }

        if (property == null || PREFS_PALETTE_MODE.equals(property)) {
            mPalette = mStore.getString(PREFS_PALETTE_MODE);
        }

        if (property == null || PREFS_USE_ECLIPSE_INDENT.equals(property)) {
            mUseEclipseIndent = mStore.getBoolean(PREFS_USE_ECLIPSE_INDENT);
        }

        if (property == null || PREVS_REMOVE_EMPTY_LINES.equals(property)) {
            mRemoveEmptyLines = mStore.getBoolean(PREVS_REMOVE_EMPTY_LINES);
        }

        if (property == null || PREFS_ONE_ATTR_PER_LINE.equals(property)) {
            mOneAttributeOnFirstLine = mStore.getBoolean(PREFS_ONE_ATTR_PER_LINE);
        }

        if (property == null || PREFS_ATTRIBUTE_SORT.equals(property)) {
            String order = mStore.getString(PREFS_ATTRIBUTE_SORT);
            mAttributeSort = XmlAttributeSortOrder.LOGICAL;
            if (XmlAttributeSortOrder.ALPHABETICAL.key.equals(order)) {
                mAttributeSort = XmlAttributeSortOrder.ALPHABETICAL;
            } else if (XmlAttributeSortOrder.NO_SORTING.key.equals(order)) {
                mAttributeSort = XmlAttributeSortOrder.NO_SORTING;
            }
        }

        if (property == null || PREFS_SPACE_BEFORE_CLOSE.equals(property)) {
            mSpaceBeforeClose = mStore.getBoolean(PREFS_SPACE_BEFORE_CLOSE);
        }

        if (property == null || PREFS_FORMAT_ON_SAVE.equals(property)) {
            mFormatOnSave = mStore.getBoolean(PREFS_FORMAT_ON_SAVE);
        }

        if (property == null || PREFS_LINT_ON_SAVE.equals(property)) {
            mLintOnSave = mStore.getBoolean(PREFS_LINT_ON_SAVE);
        }

        if (property == null || PREFS_LINT_ON_EXPORT.equals(property)) {
            mLintOnExport = mStore.getBoolean(PREFS_LINT_ON_EXPORT);
        }

        if (property == null || PREFS_SHARED_LAYOUT_EDITOR.equals(property)) {
            mSharedLayoutEditor = mStore.getBoolean(PREFS_SHARED_LAYOUT_EDITOR);
        }

        if (property == null || PREFS_AUTO_PICK_TARGET.equals(property)) {
            mAutoPickTarget = mStore.getBoolean(PREFS_AUTO_PICK_TARGET);
        }

        if (property == null || PREFS_PREVIEWS.equals(property)) {
            mPreviewMode = RenderPreviewMode.NONE;
            String previewMode = mStore.getString(PREFS_PREVIEWS);
            if (previewMode != null && !previewMode.isEmpty()) {
                try {
                    mPreviewMode = RenderPreviewMode.valueOf(previewMode.toUpperCase(Locale.US));
                } catch (IllegalArgumentException iae) {
                    // Ignore: Leave it as RenderPreviewMode.NONE
                }
            }
        }

        if (property == null || PREFS_SKIP_LINT_LIBS.equals(property)) {
            mSkipLibrariesFromLint = mStore.getBoolean(PREFS_SKIP_LINT_LIBS);
        }
    }

    /**
     * Returns the SDK folder.
     * Guaranteed to be terminated by a platform-specific path separator.
     */
    public synchronized String getOsSdkFolder() {
        return mOsSdkLocation;
    }

    public synchronized BuildVerbosity getBuildVerbosity() {
        return mBuildVerbosity;
    }

    public boolean getBuildForceResResfresh() {
        return mBuildForceResResfresh;
    }

    /**
     * Should changes made by GUI editors automatically format the corresponding XML nodes
     * affected by the edit?
     *
     * @return true if the GUI editors should format affected XML regions
     */
    public boolean getFormatGuiXml() {
        // The format-GUI-editors flag only applies when the custom formatter is used,
        // since the built-in formatter has problems editing partial documents
        return mFormatGuiXml && mCustomXmlFormatter;
    }

    /**
     * Should the XML formatter use a custom Android XML formatter (following
     * Android code style) or use the builtin Eclipse XML formatter?
     *
     * @return true if the Android formatter should be used instead of the
     *         default Eclipse one
     */
    public boolean getUseCustomXmlFormatter() {
        return mCustomXmlFormatter;
    }

    /**
     * Should the Android XML formatter use the Eclipse XML indentation settings
     * (usually one tab character) instead of the default 4 space character
     * indent?
     *
     * @return true if the Eclipse XML indentation settings should be use
     */
    public boolean isUseEclipseIndent() {
        return mUseEclipseIndent;
    }

    /**
     * Should the Android XML formatter try to avoid inserting blank lines to
     * make the format as compact as possible (no blank lines between elements,
     * no blank lines surrounding comments, etc).
     *
     * @return true to remove blank lines
     */
    public boolean isRemoveEmptyLines() {
        return mRemoveEmptyLines;
    }

    /**
     * Should the Android XML formatter attempt to place a single attribute on
     * the same line as the element open tag?
     *
     * @return true if single-attribute elements should place the attribute on
     *         the same line as the element open tag
     */
    public boolean isOneAttributeOnFirstLine() {
        return mOneAttributeOnFirstLine;
    }

    /**
     * Returns the sort order to be applied to the attributes (one of which can
     * be {@link com.android.ide.common.xml.XmlAttributeSortOrder#NO_SORTING}).
     *
     * @return the sort order to apply to the attributes
     */
    public XmlAttributeSortOrder getAttributeSort() {
        if (mAttributeSort == null) {
            return XmlAttributeSortOrder.LOGICAL;
        }
        return mAttributeSort;
    }

    /**
     * Returns whether a space should be inserted before the closing {@code >}
     * character in open tags and before the closing {@code />} characters in
     * empty tag. Note that the {@link com.android.ide.common.xml.XmlFormatStyle#RESOURCE} style overrides
     * this setting to make it more compact for the {@code <item>} elements.
     *
     * @return true if an empty space should be inserted before {@code >} or
     *         {@code />}.
     */
    public boolean isSpaceBeforeClose() {
        return mSpaceBeforeClose;
    }

    /**
     * Returns whether the file should be automatically formatted on save.
     *
     * @return true if the XML files should be formatted on save.
     */
    public boolean isFormatOnSave() {
        return mFormatOnSave;
    }

    public boolean isLintOnSave() {
        return mLintOnSave;
    }

    public void setLintOnSave(boolean on) {
        mLintOnSave = on;
        IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
        store.setValue(PREFS_LINT_ON_SAVE, on);
    }

    public boolean isLintOnExport() {
        return mLintOnExport;
    }

    public void setLintOnExport(boolean on) {
        mLintOnExport = on;
        IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
        store.setValue(PREFS_LINT_ON_EXPORT, on);
    }

    /**
     * Returns whether the layout editor is sharing a single editor for all variations
     * of a single resource. The default is false.
     *
     * @return true if the editor should be shared
     */
    public boolean isSharedLayoutEditor() {
        return mSharedLayoutEditor;
    }

    /**
     * Sets whether the layout editor should share a single editor for all variations
     * of a single resource
     *
     * @param on if true, use a single editor
     */
    public void setSharedLayoutEditor(boolean on) {
        mSharedLayoutEditor = on;
        IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
        store.setValue(PREFS_SHARED_LAYOUT_EDITOR, on);

        // TODO: If enabling a shared editor, go and close all editors that are aliasing
        // the same resource except for one of them.
    }


    public boolean getBuildForceErrorOnNativeLibInJar() {
        return mBuildForceErrorOnNativeLibInJar;
    }

    public boolean getBuildSkipPostCompileOnFileSave() {
        return mBuildSkipPostCompileOnFileSave;
    }

    public String getPaletteModes() {
        return mPalette;
    }

    public void setPaletteModes(String palette) {
        mPalette = palette;

        // need to save this new value to the store
        IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
        store.setValue(PREFS_PALETTE_MODE, palette);
    }

    public float getMonitorDensity() {
        return mMonitorDensity;
    }

    public void setMonitorDensity(float density) {
        mMonitorDensity = density;

        // need to save this new value to the store
        IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
        store.setValue(PREFS_MONITOR_DENSITY, density);
    }

    /**
     * Sets the new location of the SDK
     *
     * @param location the location of the SDK
     */
    public void setSdkLocation(File location) {
        mOsSdkLocation = location != null ? location.getPath() : null;

        // TODO: Also store this location in the .android settings directory
        // such that we can support using multiple workspaces without asking
        // over and over.
        if (mOsSdkLocation != null && mOsSdkLocation.length() > 0) {
            DdmsPreferenceStore ddmsStore = new DdmsPreferenceStore();
            ddmsStore.setLastSdkPath(mOsSdkLocation);
        }

        // need to save this new value to the store
        IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
        store.setValue(PREFS_SDK_DIR, mOsSdkLocation);
    }

    @Override
    public void initializeDefaultPreferences() {
        IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
        initializeStoreWithDefaults(store);
    }

    public void initializeStoreWithDefaults(IPreferenceStore store) {
        store.setDefault(PREFS_BUILD_RES_AUTO_REFRESH, true);
        store.setDefault(PREFS_BUILD_FORCE_ERROR_ON_NATIVELIB_IN_JAR, true);
        store.setDefault(PREFS_BUILD_SKIP_POST_COMPILE_ON_FILE_SAVE, true);

        store.setDefault(PREFS_BUILD_VERBOSITY, BuildVerbosity.ALWAYS.name());

        store.setDefault(PREFS_HOME_PACKAGE, "android.process.acore"); //$NON-NLS-1$

        store.setDefault(PREFS_MONITOR_DENSITY, 0.f);

        store.setDefault(PREFS_FORMAT_GUI_XML, true);
        store.setDefault(PREFS_USE_CUSTOM_XML_FORMATTER, true);
        store.setDefault(PREFS_ONE_ATTR_PER_LINE, true);
        store.setDefault(PREFS_SPACE_BEFORE_CLOSE, true);
        store.setDefault(PREFS_LINT_ON_SAVE, true);
        store.setDefault(PREFS_LINT_ON_EXPORT, true);
        store.setDefault(PREFS_AUTO_PICK_TARGET, true);

        // Defaults already handled; no need to write into map:
        //store.setDefault(PREFS_ATTRIBUTE_SORT, XmlAttributeSortOrder.LOGICAL.key);
        //store.setDefault(PREFS_USE_ECLIPSE_INDENT, false);
        //store.setDefault(PREVS_REMOVE_EMPTY_LINES, false);
        //store.setDefault(PREFS_FORMAT_ON_SAVE, false);
        //store.setDefault(PREFS_SHARED_LAYOUT_EDITOR, false);
        //store.setDefault(PREFS_SKIP_LINT_LIBS, false);

        try {
            store.setDefault(PREFS_DEFAULT_DEBUG_KEYSTORE,
                    DebugKeyProvider.getDefaultKeyStoreOsPath());
        } catch (KeytoolException e) {
            AdtPlugin.log(e, "Get default debug keystore path failed"); //$NON-NLS-1$
        } catch (AndroidLocationException e) {
            AdtPlugin.log(e, "Get default debug keystore path failed"); //$NON-NLS-1$
        }
    }

    /**
     * Returns whether the most recent page switch was to XML
     *
     * @param editorType the editor to check a preference for; corresponds to
     *            one of the persistence class ids returned by
     *            {@link AndroidXmlEditor#getPersistenceCategory}
     * @return whether the most recent page switch in the given editor was to
     *         XML
     */
    public boolean isXmlEditorPreferred(int editorType) {
        return (mPreferXmlEditor & editorType) != 0;
    }

    /**
     * Set whether the most recent page switch for a given editor type was to
     * XML
     *
     * @param editorType the editor to check a preference for; corresponds to
     *            one of the persistence class ids returned by
     *            {@link AndroidXmlEditor#getPersistenceCategory}
     * @param xml whether the last manual page switch in the given editor type
     *            was to XML
     */
    public void setXmlEditorPreferred(int editorType, boolean xml) {
        if (xml != isXmlEditorPreferred(editorType)) {
            if (xml) {
                mPreferXmlEditor |= editorType;
            } else {
                mPreferXmlEditor &= ~editorType;
            }
            assert ((mPreferXmlEditor & editorType) != 0) == xml;
            IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
            store.setValue(PREFS_PREFER_XML, xml);
        }
    }

    /**
     * Gets the {@link RenderPreviewMode}
     *
     * @return the preview mode
     */
    @NonNull
    public RenderPreviewMode getRenderPreviewMode() {
        return mPreviewMode;
    }

    /**
     * Sets the {@link RenderPreviewMode}
     *
     * @param previewMode the preview mode
     */
    public void setPreviewMode(@NonNull RenderPreviewMode previewMode) {
        mPreviewMode = previewMode;
        IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
        if (previewMode != RenderPreviewMode.NONE) {
            store.setValue(PREFS_PREVIEWS, previewMode.name().toLowerCase(Locale.US));
        } else {
            store.setToDefault(PREFS_PREVIEWS);
        }
    }

    /**
     * Sets whether auto-pick render target mode is enabled.
     *
     * @return whether the layout editor should automatically pick the best render target
     */
    public boolean isAutoPickRenderTarget() {
        return mAutoPickTarget;
    }

    /**
     * Sets whether auto-pick render target mode is enabled.
     *
     * @param autoPick if true, auto pick the best render target in the layout editor
     */
    public void setAutoPickRenderTarget(boolean autoPick) {
        mAutoPickTarget = autoPick;
        IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
        if (autoPick) {
            store.setToDefault(PREFS_AUTO_PICK_TARGET);
        } else {
            store.setValue(PREFS_AUTO_PICK_TARGET, autoPick);
        }
    }

    /**
     * Sets whether libraries should be excluded when running lint on a project
     *
     * @param exclude if true, exclude library projects
     */
    public void setSkipLibrariesFromLint(boolean exclude) {
        if (exclude != mSkipLibrariesFromLint) {
            mSkipLibrariesFromLint = exclude;
            IPreferenceStore store = AdtPlugin.getDefault().getPreferenceStore();
            if (exclude) {
                store.setValue(PREFS_SKIP_LINT_LIBS, true);
            } else {
                store.setToDefault(PREFS_SKIP_LINT_LIBS);
            }
        }
    }

    /**
     * Returns whether libraries should be excluded when running lint on a project
     *
     * @return if true, exclude library projects
     */
    public boolean getSkipLibrariesFromLint() {
        return mSkipLibrariesFromLint;
    }
}