src/content/public/android/java/src/org/chromium/content/browser/input/SelectPopupDialog.java

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 package org.chromium.content.browser.input;
   6
   7 import android.app.AlertDialog;
   8 import android.content.Context;
   9 import android.content.DialogInterface;
  10 import android.content.res.TypedArray;
  11 import android.util.SparseBooleanArray;
  12 import android.view.View;
  13 import android.widget.AdapterView;
  14 import android.widget.AdapterView.OnItemClickListener;
  15 import android.widget.ListView;
  16
  17 import org.chromium.content.R;
  18 import org.chromium.content.browser.ContentViewCore;
  19
  20 import java.util.List;
  21
  22 /**
  23  * Handles the popup dialog for the <select> HTML tag support.
  24  */
  25 public class SelectPopupDialog implements SelectPopup {
  26     private static final int[] SELECT_DIALOG_ATTRS = {
  27         R.attr.select_dialog_multichoice,
  28         R.attr.select_dialog_singlechoice
  29     };
  30
  31     // The dialog hosting the popup list view.
  32     private final AlertDialog mListBoxPopup;
  33     private final ContentViewCore mContentViewCore;
  34     private final Context mContext;
  35
  36     private boolean mSelectionNotified;
  37
  38     public SelectPopupDialog(ContentViewCore contentViewCore, List<SelectPopupItem> items,
  39             boolean multiple, int[] selected) {
  40         mContentViewCore = contentViewCore;
  41         mContext = mContentViewCore.getContext();
  42
  43         final ListView listView = new ListView(mContext);
  44         listView.setCacheColorHint(0);
  45         AlertDialog.Builder b = new AlertDialog.Builder(mContext)
  46                 .setView(listView)
  47                 .setCancelable(true)
  48                 .setInverseBackgroundForced(true);
  49
  50         if (multiple) {
  51             b.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
  52                 @Override
  53                 public void onClick(DialogInterface dialog, int which) {
  54                     notifySelection(getSelectedIndices(listView));
  55                 }
  56             });
  57             b.setNegativeButton(android.R.string.cancel,
  58                     new DialogInterface.OnClickListener() {
  59                         @Override
  60                         public void onClick(DialogInterface dialog, int which) {
  61                             notifySelection(null);
  62                         }
  63                     });
  64         }
  65         mListBoxPopup = b.create();
  66         final SelectPopupAdapter adapter = new SelectPopupAdapter(
  67                 mContext, getSelectDialogLayout(multiple), items);
  68         listView.setAdapter(adapter);
  69         listView.setFocusableInTouchMode(true);
  70
  71         if (multiple) {
  72             listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
  73             for (int i = 0; i < selected.length; ++i) {
  74                 listView.setItemChecked(selected[i], true);
  75             }
  76         } else {
  77             listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
  78             listView.setOnItemClickListener(new OnItemClickListener() {
  79                 @Override
  80                 public void onItemClick(AdapterView<?> parent, View v,
  81                         int position, long id) {
  82                     notifySelection(getSelectedIndices(listView));
  83                     mListBoxPopup.dismiss();
  84                 }
  85             });
  86             if (selected.length > 0) {
  87                 listView.setSelection(selected[0]);
  88                 listView.setItemChecked(selected[0], true);
  89             }
  90         }
  91         mListBoxPopup.setOnCancelListener(new DialogInterface.OnCancelListener() {
  92             @Override
  93             public void onCancel(DialogInterface dialog) {
  94                 notifySelection(null);
  95             }
  96         });
  97     }
  98
  99     private int getSelectDialogLayout(boolean isMultiChoice) {
 100         int resourceId;
 101         TypedArray styledAttributes = mContext.obtainStyledAttributes(
 102                 R.style.SelectPopupDialog, SELECT_DIALOG_ATTRS);
 103         resourceId = styledAttributes.getResourceId(isMultiChoice ? 0 : 1, 0);
 104         styledAttributes.recycle();
 105         return resourceId;
 106     }
 107
 108     private static int[] getSelectedIndices(ListView listView) {
 109         SparseBooleanArray sparseArray = listView.getCheckedItemPositions();
 110         int selectedCount = 0;
 111         for (int i = 0; i < sparseArray.size(); ++i) {
 112             if (sparseArray.valueAt(i)) {
 113                 selectedCount++;
 114             }
 115         }
 116         int[] indices = new int[selectedCount];
 117         for (int i = 0, j = 0; i < sparseArray.size(); ++i) {
 118             if (sparseArray.valueAt(i)) {
 119                 indices[j++] = sparseArray.keyAt(i);
 120             }
 121         }
 122         return indices;
 123     }
 124
 125     private void notifySelection(int[] indicies) {
 126         if (mSelectionNotified) return;
 127         mContentViewCore.selectPopupMenuItems(indicies);
 128         mSelectionNotified = true;
 129     }
 130
 131     @Override
 132     public void show() {
 133         mListBoxPopup.show();
 134     }
 135
 136     @Override
 137     public void hide() {
 138         mListBoxPopup.cancel();
 139         notifySelection(null);
 140     }
 141 }