Merge "Move xmlParserUtils to core"

src/com/android/settings/core/PreferenceXmlParserUtils.java

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2017 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 com.android.settings.core;
+
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.util.TypedValue;
+import com.android.settings.R;
+
+/**
+ * Utility class to parse elements of XML preferences
+ */
+public class PreferenceXmlParserUtils {
+
+    private static final String ENTRIES_SEPARATOR = "|";
+
+    public static String getDataKey(Context context, AttributeSet attrs) {
+        return getData(context, attrs,
+                com.android.internal.R.styleable.Preference,
+                com.android.internal.R.styleable.Preference_key);
+    }
+
+    public static String getDataTitle(Context context, AttributeSet attrs) {
+        return getData(context, attrs,
+                com.android.internal.R.styleable.Preference,
+                com.android.internal.R.styleable.Preference_title);
+    }
+
+    public static String getDataSummary(Context context, AttributeSet attrs) {
+        return getData(context, attrs,
+                com.android.internal.R.styleable.Preference,
+                com.android.internal.R.styleable.Preference_summary);
+    }
+
+    public static String getDataSummaryOn(Context context, AttributeSet attrs) {
+        return getData(context, attrs,
+                com.android.internal.R.styleable.CheckBoxPreference,
+                com.android.internal.R.styleable.CheckBoxPreference_summaryOn);
+    }
+
+    public static String getDataSummaryOff(Context context, AttributeSet attrs) {
+        return getData(context, attrs,
+                com.android.internal.R.styleable.CheckBoxPreference,
+                com.android.internal.R.styleable.CheckBoxPreference_summaryOff);
+    }
+
+    public static String getDataEntries(Context context, AttributeSet attrs) {
+        return getDataEntries(context, attrs,
+                com.android.internal.R.styleable.ListPreference,
+                com.android.internal.R.styleable.ListPreference_entries);
+    }
+
+    public static String getDataKeywords(Context context, AttributeSet attrs) {
+        return getData(context, attrs, R.styleable.Preference, R.styleable.Preference_keywords);
+    }
+
+    public static String getController(Context context, AttributeSet attrs) {
+        return getData(context, attrs, R.styleable.Preference, R.styleable.Preference_controller);
+    }
+
+    public static int getDataIcon(Context context, AttributeSet attrs) {
+        final TypedArray ta = context.obtainStyledAttributes(attrs,
+                com.android.internal.R.styleable.Preference);
+        final int dataIcon = ta.getResourceId(com.android.internal.R.styleable.Icon_icon, 0);
+        ta.recycle();
+        return dataIcon;
+    }
+
+    /**
+     * Returns the fragment name if this preference launches a child fragment.
+     */
+    public static String getDataChildFragment(Context context, AttributeSet attrs) {
+        return getData(context, attrs, R.styleable.Preference,
+                R.styleable.Preference_android_fragment);
+    }
+
+    @Nullable
+    private static String getData(Context context, AttributeSet set, int[] attrs, int resId) {
+        final TypedArray ta = context.obtainStyledAttributes(set, attrs);
+        String data = ta.getString(resId);
+        ta.recycle();
+        return data;
+    }
+
+    private static String getDataEntries(Context context, AttributeSet set, int[] attrs, int resId) {
+        final TypedArray sa = context.obtainStyledAttributes(set, attrs);
+        final TypedValue tv = sa.peekValue(resId);
+        sa.recycle();
+        String[] data = null;
+        if (tv != null && tv.type == TypedValue.TYPE_REFERENCE) {
+            if (tv.resourceId != 0) {
+                data = context.getResources().getStringArray(tv.resourceId);
+            }
+        }
+        final int count = (data == null ) ? 0 : data.length;
+        if (count == 0) {
+            return null;
+        }
+        final StringBuilder result = new StringBuilder();
+        for (int n = 0; n < count; n++) {
+            result.append(data[n]);
+            result.append(ENTRIES_SEPARATOR);
+        }
+        return result.toString();
+    }
+}