PreferenceHelper.java

package com.nolanlawson.logcat.helper;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.preference.PreferenceManager;

import com.nolanlawson.logcat.R;
import com.nolanlawson.logcat.data.ColorScheme;
import com.nolanlawson.logcat.util.StringUtil;
import com.nolanlawson.logcat.util.UtilLogger;
import com.nolanlawson.logcat.widget.MultipleChoicePreference;

public class PreferenceHelper {
	
	public static Map<Integer, Integer> ellipsisLengthsCache = 
		Collections.synchronizedMap(new HashMap<Integer,Integer>());
	
	private static float textSize = -1;
	private static Character defaultLogLevel = null;
	private static Boolean showTimestampAndPid = null;
	private static ColorScheme colorScheme = null;
	private static int displayLimit = -1;
	
	private static UtilLogger log = new UtilLogger(PreferenceHelper.class);
	
	private static final String WIDGET_EXISTS_PREFIX = "widget_";
	
	public static void clearCache() {
		defaultLogLevel = null;
		textSize = -1;
		showTimestampAndPid = null;
		colorScheme = null;
		ellipsisLengthsCache.clear();
		displayLimit = -1;
	}	
	
	/**
	 * Record that we managed to get root in JellyBean.
	 * @param context
	 * @return
	 */
	public static void setJellybeanRootRan(Context context) {
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
        Editor editor = sharedPrefs.edit();
        editor.putBoolean(context.getString(R.string.pref_ran_jellybean_su_update), true);
        editor.commit();
	}
	
	/**
	 * Return true if we have root in jelly bean.
	 * @param context
	 * @return
	 */
	public static boolean getJellybeanRootRan(Context context) {
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		return sharedPrefs.getBoolean(context.getString(R.string.pref_ran_jellybean_su_update), false);
	}
	
	public static boolean getWidgetExistsPreference(Context context, int appWidgetId) {
		
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		String widgetExists = WIDGET_EXISTS_PREFIX.concat(Integer.toString(appWidgetId));
		
		return sharedPrefs.getBoolean(widgetExists, false);
	}
	
	public static void setWidgetExistsPreference(Context context, int[] appWidgetIds) {
		
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		
		Editor editor = sharedPrefs.edit();
		
		for (int appWidgetId : appWidgetIds) {
			String widgetExists = WIDGET_EXISTS_PREFIX.concat(Integer.toString(appWidgetId));
			editor.putBoolean(widgetExists, true);
		}
		
		editor.commit();
		
		
	}
	
	public static int getDisplayLimitPreference(Context context) {
		
		if (displayLimit == -1) {
		
			SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
			
			String defaultValue = context.getText(R.string.pref_display_limit_default).toString();
			
			String intAsString = sharedPrefs.getString(context.getText(R.string.pref_display_limit).toString(), defaultValue);
			
			try { 
				displayLimit = Integer.parseInt(intAsString);
			} catch (NumberFormatException e) {
				displayLimit = Integer.parseInt(defaultValue);
			}
		}
		
		return displayLimit;
	}
	
	public static int getLogLinePeriodPreference(Context context) {
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		
		String defaultValue = context.getText(R.string.pref_log_line_period_default).toString();
		
		String intAsString = sharedPrefs.getString(context.getText(R.string.pref_log_line_period).toString(), defaultValue);
		
		try { 
			return Integer.parseInt(intAsString);
		} catch (NumberFormatException e) {
			return Integer.parseInt(defaultValue);
		}
	}
	
	public static void setDisplayLimitPreference(Context context, int value) {
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		Editor editor = sharedPrefs.edit();
		
		editor.putString(context.getText(R.string.pref_display_limit).toString(), Integer.toString(value));
		
		editor.commit();
	}
	
	public static void setLogLinePeriodPreference(Context context, int value) {
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		Editor editor = sharedPrefs.edit();
		
		editor.putString(context.getText(R.string.pref_log_line_period).toString(), Integer.toString(value));
		
		editor.commit();
	}
	
	public static char getDefaultLogLevelPreference(Context context) {
		
		if (defaultLogLevel == null) {
			SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
			
			String logLevelPref = sharedPrefs.getString(
					context.getText(R.string.pref_default_log_level).toString(), 
					context.getText(R.string.log_level_value_verbose).toString());		
			
			defaultLogLevel = logLevelPref.charAt(0);
		}
		
		return defaultLogLevel;
		

	}
	
	public static float getTextSizePreference(Context context) {
		
		if (textSize == -1) {
		
			SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
			
			String textSizePref = sharedPrefs.getString(
					context.getText(R.string.pref_text_size).toString(), 
					context.getText(R.string.text_size_medium_value).toString());

			if (textSizePref.equals(context.getText(R.string.text_size_xsmall_value))) {
				cacheTextsize(context, R.dimen.text_size_xsmall);
			} else if (textSizePref.equals(context.getText(R.string.text_size_small_value))) {
				cacheTextsize(context, R.dimen.text_size_small);
			} else if (textSizePref.equals(context.getText(R.string.text_size_medium_value))) {
				cacheTextsize(context, R.dimen.text_size_medium);
			} else if (textSizePref.equals(context.getText(R.string.text_size_large_value))) {
				cacheTextsize(context, R.dimen.text_size_large);
			} else { // xlarge
				cacheTextsize(context, R.dimen.text_size_xlarge);
			}
		}
		
		return textSize;
		
	}
	
	private static void cacheTextsize(Context context, int dimenId) {
		
		float unscaledSize = context.getResources().getDimension(dimenId);
		
		log.d("unscaledSize is %g", unscaledSize);
		
		textSize = unscaledSize;
	}

	public static boolean getShowTimestampAndPidPreference(Context context) {

		if (showTimestampAndPid == null) {
			SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
			
			showTimestampAndPid = sharedPrefs.getBoolean(context.getText(R.string.pref_show_timestamp).toString(), true);
		}	
		
		return showTimestampAndPid;
		
	}
	
	public static boolean getHidePartialSelectHelpPreference(Context context) {

		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		
		return sharedPrefs.getBoolean(
				context.getText(R.string.pref_hide_partial_select_help).toString(), false);
	}
	public static void setHidePartialSelectHelpPreference(Context context, boolean bool) {

		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		Editor editor = sharedPrefs.edit();
		
		editor.putBoolean(context.getString(R.string.pref_hide_partial_select_help), bool);
		
		editor.commit();

	}
	
	public static boolean getExpandedByDefaultPreference(Context context) {

		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		
		return sharedPrefs.getBoolean(
				context.getText(R.string.pref_expanded_by_default).toString(), false);
	}
	public static void setFirstRunPreference(Context context, boolean bool) {

		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		Editor editor = sharedPrefs.edit();
		
		editor.putBoolean(context.getString(R.string.first_run), bool);
		
		editor.commit();

	}
	public static boolean getFirstRunPreference(Context context) {

		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		return sharedPrefs.getBoolean(context.getString(R.string.first_run), true);

	}
	
	public static ColorScheme getColorScheme(Context context) {
		
		if (colorScheme == null) {
		
			if (!PackageHelper.isCatlogDonateInstalled(context)) {
				colorScheme = ColorScheme.Dark; // hard-coded in free version
			} else {
				SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
				String colorSchemeName = sharedPrefs.getString(
						context.getText(R.string.pref_theme).toString(), context.getText(ColorScheme.Dark.getNameResource()).toString());
				
				colorScheme = ColorScheme.findByPreferenceName(colorSchemeName, context);
			}
		}
		
		return colorScheme;
		
	}
		
	public static void setColorScheme(Context context, ColorScheme colorScheme) {
		
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		Editor editor = sharedPrefs.edit();
		
		editor.putString(context.getString(R.string.pref_theme).toString(), context.getText(colorScheme.getNameResource()).toString());
		
		editor.commit();
		
	}
	
	public static List<String> getBuffers(Context context) {
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		
		String defaultValue = context.getString(R.string.pref_buffer_choice_main_value);
		String key = context.getString(R.string.pref_buffer);
		
		String value = sharedPrefs.getString(key, defaultValue);
		
		return Arrays.asList(StringUtil.split(value, MultipleChoicePreference.DELIMITER));
	}
	
	public static List<String> getBufferNames(Context context) {
		List<String> buffers = getBuffers(context);
		
		List<String> bufferNames = new ArrayList<String>();
		
		// TODO: this is inefficient - O(n^2)
		for (String buffer : buffers) {
			int idx = Arrays.asList(context.getResources().getStringArray(
					R.array.pref_buffer_choice_values)).indexOf(buffer);
			bufferNames.add(context.getResources().getStringArray(R.array.pref_buffer_choices)[idx]);
		}
		return bufferNames;
	}
	
	public static void setBuffer(Context context, int stringResId) {
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		
		String key = context.getString(R.string.pref_buffer);
		String value = context.getString(stringResId);
		
		Editor editor = sharedPrefs.edit();
		
		editor.putString(key, value);
		
		editor.commit();
	}
	
	public static boolean getIncludeDeviceInfoPreference(Context context) {
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		
		return sharedPrefs.getBoolean(context.getString(R.string.pref_include_device_info), true);
	}
	
	public static void setIncludeDeviceInfoPreference(Context context, boolean value) {
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
		
		Editor editor = sharedPrefs.edit();
		editor.putBoolean(context.getString(R.string.pref_include_device_info), value);
		editor.commit();
	}
}