content: /*
   * Copyright (C) 2006 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 android.widget;
  
  import android.annotation.IdRes;
  import android.annotation.LayoutRes;
  import android.annotation.UnsupportedAppUsage;
  import android.content.Context;
  import android.content.res.Resources;
  import android.net.Uri;
  import android.os.Build;
  import android.view.ContextThemeWrapper;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  /**
   * An easy adapter to map static data to views defined in an XML file. You can specify the data
   * backing the list as an ArrayList of Maps. Each entry in the ArrayList corresponds to one row
   * in the list. The Maps contain the data for each row. You also specify an XML file that
   * defines the views used to display the row, and a mapping from keys in the Map to specific
   * views.
   *
   * Binding data to views occurs in two phases. First, if a
   * {@link android.widget.SimpleAdapter.ViewBinder} is available,
   * {@link ViewBinder#setViewValue(android.view.View, Object, String)}
   * is invoked. If the returned value is true, binding has occurred.
   * If the returned value is false, the following views are then tried in order:
   * <ul>
   * <li> A view that implements Checkable (e.g. CheckBox).  The expected bind value is a boolean.
   * <li> TextView.  The expected bind value is a string and {@link #setViewText(TextView, String)}
   * is invoked.
   * <li> ImageView. The expected bind value is a resource id or a string and
   * {@link #setViewImage(ImageView, int)} or {@link #setViewImage(ImageView, String)} is invoked.
   * </ul>
   * If no appropriate binding can be found, an {@link IllegalStateException} is thrown.
   */
  public class SimpleAdapter extends BaseAdapter implements Filterable, ThemedSpinnerAdapter {
      private final LayoutInflater mInflater;
  
      private int[] mTo;
      private String[] mFrom;
      private ViewBinder mViewBinder;
  
      @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
      private List<? extends Map<String, ?>> mData;
  
      private int mResource;
      private int mDropDownResource;
  
      /** Layout inflater used for {@link #getDropDownView(int, View, ViewGroup)}. */
      private LayoutInflater mDropDownInflater;
  
      private SimpleFilter mFilter;
      private ArrayList<Map<String, ?>> mUnfilteredData;
  
      /**
       * Constructor
       *
       * @param context The context where the View associated with this SimpleAdapter is running
       * @param data A List of Maps. Each entry in the List corresponds to one row in the list. The
       *        Maps contain the data for each row, and should include all the entries specified in
       *        "from"
       * @param resource Resource identifier of a view layout that defines the views for this list
       *        item. The layout file should include at least those named views defined in "to"
       * @param from A list of column names that will be added to the Map associated with each
       *        item.
       * @param to The views that should display column in the "from" parameter. These should all be
       *        TextViews. The first N views in this list are given the values of the first N columns
       *        in the from parameter.
       */
      public SimpleAdapter(Context context, List<? extends Map<String, ?>> data,
              @LayoutRes int resource, String[] from, @IdRes int[] to) {
          mData = data;
          mResource = mDropDownResource = resource;
          mFrom = from;
          mTo = to;
          mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      }
  
      /**
       * @see android.widget.Adapter#getCount()
       */
      public int getCount() {
          return mData.size();
      }
  
      /**
       * @see android.widget.Adapter#getItem(int)
       */
      public Object getItem(int position) {
          return mData.get(position);
      }
  
      /**
       * @see android.widget.Adapter#getItemId(int)
       */
      public long getItemId(int position) {
          return position;
      }
  
      /**
       * @see android.widget.Adapter#getView(int, View, ViewGroup)
       */
      public View getView(int position, View convertView, ViewGroup parent) {
          return createViewFromResource(mInflater, position, convertView, parent, mResource);
      }
  
      private View createViewFromResource(LayoutInflater inflater, int position, View convertView,
              ViewGroup parent, int resource) {
          View v;
          if (convertView == null) {
              v = inflater.inflate(resource, parent, false);
          } else {
              v = convertView;
          }
  
          bindView(position, v);
  
          return v;
      }
  
      /**
       * <p>Sets the layout resource to create the drop down views.</p>
       *
       * @param resource the layout resource defining the drop down views
       * @see #getDropDownView(int, android.view.View, android.view.ViewGroup)
       */
      public void setDropDownViewResource(int resource) {
          mDropDownResource = resource;
      }
  
      /**
       * Sets the {@link android.content.res.Resources.Theme} against which drop-down views are
       * inflated.
       * <p>
       * By default, drop-down views are inflated against the theme of the
       * {@link Context} passed to the adapter's constructor.
       *
       * @param theme the theme against which to inflate drop-down views or
       *              {@code null} to use the theme from the adapter's context
       * @see #getDropDownView(int, View, ViewGroup)
       */
      @Override
      public void setDropDownViewTheme(Resources.Theme theme) {
          if (theme == null) {
              mDropDownInflater = null;
          } else if (theme == mInflater.getContext().getTheme()) {
              mDropDownInflater = mInflater;
          } else {
              final Context context = new ContextThemeWrapper(mInflater.getContext(), theme);
              mDropDownInflater = LayoutInflater.from(context);
          }
      }
  
      @Override
      public Resources.Theme getDropDownViewTheme() {
          return mDropDownInflater == null ? null : mDropDownInflater.getContext().getTheme();
      }
  
      @Override
      public View getDropDownView(int position, View convertView, ViewGroup parent) {
          final LayoutInflater inflater = mDropDownInflater == null ? mInflater : mDropDownInflater;
          return createViewFromResource(inflater, position, convertView, parent, mDropDownResource);
      }
  
      private void bindView(int position, View view) {
          final Map dataSet = mData.get(position);
          if (dataSet == null) {
              return;
          }
  
          final ViewBinder binder = mViewBinder;
          final String[] from = mFrom;
          final int[] to = mTo;
          final int count = to.length;
  
          for (int i = 0; i < count; i++) {
              final View v = view.findViewById(to[i]);
              if (v != null) {
                  final Object data = dataSet.get(from[i]);
                  String text = data == null ? "" : data.toString();
                  if (text == null) {
                      text = "";
                  }
  
                  boolean bound = false;
                  if (binder != null) {
                      bound = binder.setViewValue(v, data, text);
                  }
  
                  if (!bound) {
                      if (v instanceof Checkable) {
                          if (data instanceof Boolean) {
                              ((Checkable) v).setChecked((Boolean) data);
                          } else if (v instanceof TextView) {
                              // Note: keep the instanceof TextView check at the bottom of these
                              // ifs since a lot of views are TextViews (e.g. CheckBoxes).
                              setViewText((TextView) v, text);
                          } else {
                              throw new IllegalStateException(v.getClass().getName() +
                                      " should be bound to a Boolean, not a " +
                                      (data == null ? "<unknown type>" : data.getClass()));
                          }
                      } else if (v instanceof TextView) {
                          // Note: keep the instanceof TextView check at the bottom of these
                          // ifs since a lot of views are TextViews (e.g. CheckBoxes).
                          setViewText((TextView) v, text);
                      } else if (v instanceof ImageView) {
                          if (data instanceof Integer) {
                              setViewImage((ImageView) v, (Integer) data);
                          } else {
                              setViewImage((ImageView) v, text);
                          }
                      } else {
                          throw new IllegalStateException(v.getClass().getName() + " is not a " +
                                  " view that can be bounds by this SimpleAdapter");
                      }
                  }
              }
          }
      }
  
      /**
       * Returns the {@link ViewBinder} used to bind data to views.
       *
       * @return a ViewBinder or null if the binder does not exist
       *
       * @see #setViewBinder(android.widget.SimpleAdapter.ViewBinder)
       */
      public ViewBinder getViewBinder() {
          return mViewBinder;
      }
  
      /**
       * Sets the binder used to bind data to views.
       *
       * @param viewBinder the binder used to bind data to views, can be null to
       *        remove the existing binder
       *
       * @see #getViewBinder()
       */
      public void setViewBinder(ViewBinder viewBinder) {
          mViewBinder = viewBinder;
      }
  
      /**
       * Called by bindView() to set the image for an ImageView but only if
       * there is no existing ViewBinder or if the existing ViewBinder cannot
       * handle binding to an ImageView.
       *
       * This method is called instead of {@link #setViewImage(ImageView, String)}
       * if the supplied data is an int or Integer.
       *
       * @param v ImageView to receive an image
       * @param value the value retrieved from the data set
       *
       * @see #setViewImage(ImageView, String)
       */
      public void setViewImage(ImageView v, int value) {
          v.setImageResource(value);
      }
  
      /**
       * Called by bindView() to set the image for an ImageView but only if
       * there is no existing ViewBinder or if the existing ViewBinder cannot
       * handle binding to an ImageView.
       *
       * By default, the value will be treated as an image resource. If the
       * value cannot be used as an image resource, the value is used as an
       * image Uri.
       *
       * This method is called instead of {@link #setViewImage(ImageView, int)}
       * if the supplied data is not an int or Integer.
       *
       * @param v ImageView to receive an image
       * @param value the value retrieved from the data set
       *
       * @see #setViewImage(ImageView, int)
       */
      public void setViewImage(ImageView v, String value) {
          try {
              v.setImageResource(Integer.parseInt(value));
          } catch (NumberFormatException nfe) {
              v.setImageURI(Uri.parse(value));
          }
      }
  
      /**
       * Called by bindView() to set the text for a TextView but only if
       * there is no existing ViewBinder or if the existing ViewBinder cannot
       * handle binding to a TextView.
       *
       * @param v TextView to receive text
       * @param text the text to be set for the TextView
       */
      public void setViewText(TextView v, String text) {
          v.setText(text);
      }
  
      public Filter getFilter() {
          if (mFilter == null) {
              mFilter = new SimpleFilter();
          }
          return mFilter;
      }
  
      /**
       * This class can be used by external clients of SimpleAdapter to bind
       * values to views.
       *
       * You should use this class to bind values to views that are not
       * directly supported by SimpleAdapter or to change the way binding
       * occurs for views supported by SimpleAdapter.
       *
       * @see SimpleAdapter#setViewImage(ImageView, int)
       * @see SimpleAdapter#setViewImage(ImageView, String)
       * @see SimpleAdapter#setViewText(TextView, String)
       */
      public static interface ViewBinder {
          /**
           * Binds the specified data to the specified view.
           *
           * When binding is handled by this ViewBinder, this method must return true.
           * If this method returns false, SimpleAdapter will attempts to handle
           * the binding on its own.
           *
           * @param view the view to bind the data to
           * @param data the data to bind to the view
           * @param textRepresentation a safe String representation of the supplied data:
           *        it is either the result of data.toString() or an empty String but it
           *        is never null
           *
           * @return true if the data was bound to the view, false otherwise
           */
          boolean setViewValue(View view, Object data, String textRepresentation);
      }
  
      /**
       * <p>An array filters constrains the content of the array adapter with
       * a prefix. Each item that does not start with the supplied prefix
       * is removed from the list.</p>
       */
      private class SimpleFilter extends Filter {
  
          @Override
          protected FilterResults performFiltering(CharSequence prefix) {
              FilterResults results = new FilterResults();
  
              if (mUnfilteredData == null) {
                  mUnfilteredData = new ArrayList<Map<String, ?>>(mData);
              }
  
              if (prefix == null || prefix.length() == 0) {
                  ArrayList<Map<String, ?>> list = mUnfilteredData;
                  results.values = list;
                  results.count = list.size();
              } else {
                  String prefixString = prefix.toString().toLowerCase();
  
                  ArrayList<Map<String, ?>> unfilteredValues = mUnfilteredData;
                  int count = unfilteredValues.size();
  
                  ArrayList<Map<String, ?>> newValues = new ArrayList<Map<String, ?>>(count);
  
                  for (int i = 0; i < count; i++) {
                      Map<String, ?> h = unfilteredValues.get(i);
                      if (h != null) {
  
                          int len = mTo.length;
  
                          for (int j=0; j<len; j++) {
                              String str =  (String)h.get(mFrom[j]);
  
                              String[] words = str.split(" ");
                              int wordCount = words.length;
  
                              for (int k = 0; k < wordCount; k++) {
                                  String word = words[k];
  
                                  if (word.toLowerCase().startsWith(prefixString)) {
                                      newValues.add(h);
                                      break;
                                  }
                              }
                          }
                      }
                  }
  
                  results.values = newValues;
                  results.count = newValues.size();
              }
  
              return results;
          }
  
          @Override
          protected void publishResults(CharSequence constraint, FilterResults results) {
              //noinspection unchecked
              mData = (List<Map<String, ?>>) results.values;
              if (results.count > 0) {
                  notifyDataSetChanged();
              } else {
                  notifyDataSetInvalidated();
              }
          }
      }
  }
  