1 files changed, 202 insertions, 0 deletions
diff --git a/src/com/android/camera/ListPreference.java b/src/com/android/camera/ListPreference.java
new file mode 100644
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--- /dev/null
+++ b/src/com/android/camera/ListPreference.java
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2009 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.camera;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.util.TypedValue;
+
+import com.android.gallery3d.R;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A type of <code>CameraPreference</code> whose number of possible values
+ * is limited.
+ */
+public class ListPreference extends CameraPreference {
+    private static final String TAG = "ListPreference";
+    private final String mKey;
+    private String mValue;
+    private final CharSequence[] mDefaultValues;
+
+    private CharSequence[] mEntries;
+    private CharSequence[] mEntryValues;
+    private CharSequence[] mLabels;
+    private boolean mLoaded = false;
+
+    public ListPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        TypedArray a = context.obtainStyledAttributes(
+                attrs, R.styleable.ListPreference, 0, 0);
+
+        mKey = Util.checkNotNull(
+                a.getString(R.styleable.ListPreference_key));
+
+        // We allow the defaultValue attribute to be a string or an array of
+        // strings. The reason we need multiple default values is that some
+        // of them may be unsupported on a specific platform (for example,
+        // continuous auto-focus). In that case the first supported value
+        // in the array will be used.
+        int attrDefaultValue = R.styleable.ListPreference_defaultValue;
+        TypedValue tv = a.peekValue(attrDefaultValue);
+        if (tv != null && tv.type == TypedValue.TYPE_REFERENCE) {
+            mDefaultValues = a.getTextArray(attrDefaultValue);
+        } else {
+            mDefaultValues = new CharSequence[1];
+            mDefaultValues[0] = a.getString(attrDefaultValue);
+        }
+
+        setEntries(a.getTextArray(R.styleable.ListPreference_entries));
+        setEntryValues(a.getTextArray(
+                R.styleable.ListPreference_entryValues));
+        setLabels(a.getTextArray(
+                R.styleable.ListPreference_labelList));
+        a.recycle();
+    }
+
+    public String getKey() {
+        return mKey;
+    }
+
+    public CharSequence[] getEntries() {
+        return mEntries;
+    }
+
+    public CharSequence[] getEntryValues() {
+        return mEntryValues;
+    }
+
+    public CharSequence[] getLabels() {
+        return mLabels;
+    }
+
+    public void setEntries(CharSequence entries[]) {
+        mEntries = entries == null ? new CharSequence[0] : entries;
+    }
+
+    public void setEntryValues(CharSequence values[]) {
+        mEntryValues = values == null ? new CharSequence[0] : values;
+    }
+
+    public void setLabels(CharSequence labels[]) {
+        mLabels = labels == null ? new CharSequence[0] : labels;
+    }
+
+    public String getValue() {
+        if (!mLoaded) {
+            mValue = getSharedPreferences().getString(mKey,
+                    findSupportedDefaultValue());
+            mLoaded = true;
+        }
+        return mValue;
+    }
+
+    // Find the first value in mDefaultValues which is supported.
+    private String findSupportedDefaultValue() {
+        for (int i = 0; i < mDefaultValues.length; i++) {
+            for (int j = 0; j < mEntryValues.length; j++) {
+                // Note that mDefaultValues[i] may be null (if unspecified
+                // in the xml file).
+                if (mEntryValues[j].equals(mDefaultValues[i])) {
+                    return mDefaultValues[i].toString();
+                }
+            }
+        }
+        return null;
+    }
+
+    public void setValue(String value) {
+        if (findIndexOfValue(value) < 0) throw new IllegalArgumentException();
+        mValue = value;
+        persistStringValue(value);
+    }
+
+    public void setValueIndex(int index) {
+        setValue(mEntryValues[index].toString());
+    }
+
+    public int findIndexOfValue(String value) {
+        for (int i = 0, n = mEntryValues.length; i < n; ++i) {
+            if (Util.equals(mEntryValues[i], value)) return i;
+        }
+        return -1;
+    }
+
+    public int getCurrentIndex() {
+        return findIndexOfValue(getValue());
+    }
+
+    public String getEntry() {
+        return mEntries[findIndexOfValue(getValue())].toString();
+    }
+
+    public String getLabel() {
+        return mLabels[findIndexOfValue(getValue())].toString();
+    }
+
+    protected void persistStringValue(String value) {
+        SharedPreferences.Editor editor = getSharedPreferences().edit();
+        editor.putString(mKey, value);
+        editor.apply();
+    }
+
+    @Override
+    public void reloadValue() {
+        this.mLoaded = false;
+    }
+
+    public void filterUnsupported(List<String> supported) {
+        ArrayList<CharSequence> entries = new ArrayList<CharSequence>();
+        ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>();
+        for (int i = 0, len = mEntryValues.length; i < len; i++) {
+            if (supported.indexOf(mEntryValues[i].toString()) >= 0) {
+                entries.add(mEntries[i]);
+                entryValues.add(mEntryValues[i]);
+            }
+        }
+        int size = entries.size();
+        mEntries = entries.toArray(new CharSequence[size]);
+        mEntryValues = entryValues.toArray(new CharSequence[size]);
+    }
+
+    public void filterDuplicated() {
+        ArrayList<CharSequence> entries = new ArrayList<CharSequence>();
+        ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>();
+        for (int i = 0, len = mEntryValues.length; i < len; i++) {
+            if (!entries.contains(mEntries[i])) {
+                entries.add(mEntries[i]);
+                entryValues.add(mEntryValues[i]);
+            }
+        }
+        int size = entries.size();
+        mEntries = entries.toArray(new CharSequence[size]);
+        mEntryValues = entryValues.toArray(new CharSequence[size]);
+    }
+
+    public void print() {
+        Log.v(TAG, "Preference key=" + getKey() + ". value=" + getValue());
+        for (int i = 0; i < mEntryValues.length; i++) {
+            Log.v(TAG, "entryValues[" + i + "]=" + mEntryValues[i]);
+        }
+    }
+}