SelectPopupAdapter.java revision effb81e5f8246d0db0270817048dc992db66e9fb 
1// Copyright 2013 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
5package org.chromium.content.browser.input;
6
7import android.content.Context;
8import android.view.View;
9import android.view.ViewGroup;
10import android.widget.ArrayAdapter;
11import android.widget.CheckedTextView;
12import android.widget.TextView;
13
14import java.util.ArrayList;
15import java.util.List;
16
17/**
18 * Select popup item adapter for SelectPopupDialog, used so we can disable
19 * OPTION_GROUP items.
20 */
21public class SelectPopupAdapter extends ArrayAdapter<SelectPopupItem> {
22    // Holds the items of the select popup alert dialog list.
23    private List<SelectPopupItem> mItems;
24
25    // True if all items have type PopupItemType.ENABLED.
26    private boolean mAreAllItemsEnabled;
27
28    /**
29     * Creates a new SelectPopupItem adapter for the select popup alert dialog list.
30     * @param context        Application context.
31     * @param layoutResource Layout resource used for the alert dialog list.
32     * @param items          SelectPopupItem array list.
33     */
34    public SelectPopupAdapter(Context context, int layoutResource,
35            List<SelectPopupItem> items) {
36        super(context, layoutResource, items);
37        mItems = new ArrayList<SelectPopupItem>(items);
38
39        mAreAllItemsEnabled = true;
40        for (int i = 0; i < mItems.size(); i++) {
41            if (mItems.get(i).getType() != PopupItemType.ENABLED) {
42                mAreAllItemsEnabled = false;
43                break;
44            }
45        }
46    }
47
48    @Override
49    public View getView(int position, View convertView, ViewGroup parent) {
50        if (position < 0 || position >= getCount()) return null;
51
52        // Always pass in null so that we will get a new CheckedTextView. Otherwise, an item
53        // which was previously used as an <optgroup> element (i.e. has no check), could get
54        // used as an <option> element, which needs a checkbox/radio, but it would not have
55        // one.
56        convertView = super.getView(position, null, parent);
57        ((TextView) convertView).setText(mItems.get(position).getLabel());
58
59        if (mItems.get(position).getType() != PopupItemType.ENABLED) {
60            if (mItems.get(position).getType() == PopupItemType.GROUP) {
61                // Currently select_dialog_multichoice uses CheckedTextViews.
62                // If that changes, the class cast will no longer be valid.
63                // The WebView build cannot rely on this being the case, so
64                // we must check.
65                if (convertView instanceof CheckedTextView) {
66                    ((CheckedTextView) convertView).setCheckMarkDrawable(null);
67                }
68            } else {
69                // Draw the disabled element in a disabled state.
70                convertView.setEnabled(false);
71            }
72        }
73        return convertView;
74    }
75
76    @Override
77    public boolean areAllItemsEnabled() {
78        return mAreAllItemsEnabled;
79    }
80
81    @Override
82    public boolean isEnabled(int position) {
83        if (position < 0 || position >= getCount()) return false;
84        return mItems.get(position).getType() == PopupItemType.ENABLED;
85    }
86}
87