1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.mail.drawer; 18 19 import android.support.annotation.IntDef; 20 import android.view.LayoutInflater; 21 import android.view.View; 22 import android.view.ViewGroup; 23 24 import com.android.bitmap.BitmapCache; 25 import com.android.mail.bitmap.ContactResolver; 26 import com.android.mail.providers.Account; 27 import com.android.mail.providers.Folder; 28 import com.android.mail.ui.ControllableActivity; 29 import com.android.mail.ui.FolderListFragment; 30 import com.android.mail.utils.FolderUri; 31 32 import java.lang.annotation.Retention; 33 import java.lang.annotation.RetentionPolicy; 34 35 36 /** 37 * An element that is shown in the {@link com.android.mail.ui.FolderListFragment}. This class is 38 * only used for elements that are shown in the {@link com.android.mail.ui.DrawerFragment}. 39 * This class is an enumeration of a few element types: Account, a folder, a recent folder, 40 * or a header (a resource string). A {@link DrawerItem} can only be one type and can never 41 * switch types. Items are created using methods like 42 * {@link DrawerItem#ofAccount(ControllableActivity, Account, int, boolean, BitmapCache, 43 * ContactResolver)}, 44 * {@link DrawerItem#ofWaitView(ControllableActivity)}, etc. 45 * 46 * Once created, the item can create a view using 47 * {@link #getView(android.view.View, android.view.ViewGroup)}. 48 */ 49 public abstract class DrawerItem { 50 public final Folder mFolder; 51 public final Account mAccount; 52 53 /** These are view types for view recycling purposes */ 54 @Retention(RetentionPolicy.CLASS) 55 @IntDef({VIEW_FOLDER, VIEW_HEADER, VIEW_BLANK_HEADER, VIEW_BOTTOM_SPACE, VIEW_ACCOUNT, 56 VIEW_WAITING_FOR_SYNC, VIEW_FOOTER_HELP, VIEW_FOOTER_SETTINGS}) 57 public @interface DrawerItemType {} 58 /** A normal folder, also a child, if a parent is specified. */ 59 public static final int VIEW_FOLDER = 0; 60 /** A text-label which serves as a header in sectioned lists. */ 61 public static final int VIEW_HEADER = 1; 62 /** A blank divider which serves as a header in sectioned lists. */ 63 public static final int VIEW_BLANK_HEADER = 2; 64 /** A spacer which serves as a footer below the last item. */ 65 public static final int VIEW_BOTTOM_SPACE = 3; 66 /** An account object, which allows switching accounts rather than folders. */ 67 public static final int VIEW_ACCOUNT = 4; 68 /** An expandable object for expanding/collapsing more of the list */ 69 public static final int VIEW_WAITING_FOR_SYNC = 5; 70 /** A footer item for Help */ 71 public static final int VIEW_FOOTER_HELP = 6; 72 /** A footer item for Settings */ 73 public static final int VIEW_FOOTER_SETTINGS = 7; 74 /** The value (1-indexed) of the last View type. Useful when returning the number of types. */ 75 private static final int LAST_FIELD = VIEW_FOOTER_SETTINGS + 1; 76 77 /** The parent activity */ 78 protected final ControllableActivity mActivity; 79 protected final LayoutInflater mInflater; 80 81 /** 82 * These values determine the behavior of the drawer items. 83 * 84 * Either {@link #FOLDER_INBOX}, {@link #FOLDER_RECENT} or {@link #FOLDER_OTHER} when 85 * {@link #getType()} is {@link #VIEW_FOLDER}, or {@link #NONFOLDER_ITEM} otherwise. 86 */ 87 @Retention(RetentionPolicy.CLASS) 88 @IntDef({UNSET, NONFOLDER_ITEM, FOLDER_INBOX, FOLDER_RECENT, FOLDER_OTHER}) 89 public @interface DrawerItemCategory {} 90 public final @DrawerItemCategory int mItemCategory; 91 /** Non existent item or folder type not yet set */ 92 public static final int UNSET = 0; 93 /** An unclickable text-header visually separating the different types. */ 94 public static final int NONFOLDER_ITEM = 0; 95 /** An inbox folder: Inbox, ...*/ 96 public static final int FOLDER_INBOX = 1; 97 /** A folder from whom a conversation was recently viewed */ 98 public static final int FOLDER_RECENT = 2; 99 /** A non-inbox folder that is shown in the "everything else" group. */ 100 public static final int FOLDER_OTHER = 3; 101 102 /** 103 * Creates a drawer item with every instance variable specified. 104 * 105 * @param activity the underlying activity 106 * @param folder a non-null folder, if this is a folder type 107 * @param itemCategory the type of the folder. For folders this is: 108 * {@link #FOLDER_INBOX}, {@link #FOLDER_RECENT}, {@link #FOLDER_OTHER}, 109 * or for non-folders this is {@link #NONFOLDER_ITEM} 110 * @param account the account object, for an account drawer element 111 */ 112 protected DrawerItem(ControllableActivity activity, Folder folder, 113 @DrawerItemCategory int itemCategory, Account account) { 114 mActivity = activity; 115 mFolder = folder; 116 mItemCategory = itemCategory; 117 mAccount = account; 118 mInflater = LayoutInflater.from(activity.getActivityContext()); 119 } 120 121 /** 122 * Create a folder item with the given type. 123 * 124 * @param activity the underlying activity 125 * @param folder a folder that this item represents 126 * @param itemCategory one of {@link #FOLDER_INBOX}, {@link #FOLDER_RECENT} or 127 * {@link #FOLDER_OTHER} 128 * @return a drawer item for the folder. 129 */ 130 public static DrawerItem ofFolder(ControllableActivity activity, Folder folder, 131 @DrawerItemCategory int itemCategory) { 132 return new FolderDrawerItem(activity, folder, itemCategory); 133 } 134 135 /** 136 * Creates an item from an account. 137 * @param activity the underlying activity 138 * @param account the account to create a drawer item for 139 * @param unreadCount the unread count of the account, pass zero if 140 * @param isCurrentAccount true if the account is the current account, false otherwise 141 * @return a drawer item for the account. 142 */ 143 public static DrawerItem ofAccount(ControllableActivity activity, Account account, 144 int unreadCount, boolean isCurrentAccount, BitmapCache cache, 145 ContactResolver contactResolver) { 146 return new AccountDrawerItem(activity, account, unreadCount, isCurrentAccount, cache, 147 contactResolver); 148 } 149 150 /** 151 * Create a header item with a string resource. 152 * 153 * @param activity the underlying activity 154 * @param resource the string resource: R.string.all_folders_heading 155 * @return a drawer item for the header. 156 */ 157 public static DrawerItem ofHeader(ControllableActivity activity, int resource) { 158 return new HeaderDrawerItem(activity, resource); 159 } 160 161 public static DrawerItem ofBlankHeader(ControllableActivity activity) { 162 return new BlankHeaderDrawerItem(activity); 163 } 164 165 public static DrawerItem ofBottomSpace(ControllableActivity activity) { 166 return new BottomSpaceDrawerItem(activity); 167 } 168 169 /** 170 * Create a "waiting for initialization" item. 171 * 172 * @param activity the underlying activity 173 * @return a drawer item with an indeterminate progress indicator. 174 */ 175 public static DrawerItem ofWaitView(ControllableActivity activity) { 176 return new WaitViewDrawerItem(activity); 177 } 178 179 public static DrawerItem ofHelpItem(ControllableActivity activity, Account account, 180 FolderListFragment.DrawerStateListener drawerListener) { 181 return new HelpItem(activity, account, drawerListener); 182 } 183 184 public static DrawerItem ofSettingsItem(ControllableActivity activity, Account account, 185 FolderListFragment.DrawerStateListener drawerListener) { 186 return new SettingsItem(activity, account, drawerListener); 187 } 188 189 /** 190 * Returns a view for the given item. The method signature is identical to that required by a 191 * {@link android.widget.ListAdapter#getView(int, android.view.View, android.view.ViewGroup)}. 192 */ 193 public abstract View getView(View convertView, ViewGroup parent); 194 195 /** 196 * Book-keeping for how many different view types there are. 197 * @return number of different types of view items 198 */ 199 public static int getViewTypeCount() { 200 return LAST_FIELD; 201 } 202 203 /** 204 * Returns whether this view is enabled or not. An enabled view is one that accepts user taps 205 * and acts upon them. 206 * @return true if this view is enabled, false otherwise. 207 */ 208 public abstract boolean isItemEnabled(); 209 210 /** 211 * Returns whether this view is highlighted or not. 212 * 213 * 214 * @param currentFolder The current folder, according to the 215 * {@link com.android.mail.ui.FolderListFragment} 216 * @param currentType The type of the current folder. We want to only highlight a folder once. 217 * A folder might be in two places at once: in "All Folders", and in 218 * "Recent Folder". Valid types of selected folders are : 219 * {@link DrawerItem#FOLDER_INBOX}, {@link DrawerItem#FOLDER_RECENT} or 220 * {@link DrawerItem#FOLDER_OTHER}, or {@link DrawerItem#UNSET}. 221 222 * @return true if this DrawerItem results in a view that is highlighted (this DrawerItem is 223 * the current folder. 224 */ 225 public abstract boolean isHighlighted(FolderUri currentFolder, int currentType); 226 227 public abstract @DrawerItemType int getType(); 228 229 public void onClick(View v) {} 230 } 231 232
