| 1 | // Copyright (c) 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; |
| 6 | |
| 7 | import android.app.SearchManager; |
| 8 | import android.content.ClipboardManager; |
| 9 | import android.content.Context; |
| 10 | import android.content.Intent; |
| 11 | import android.content.pm.PackageManager; |
| 12 | import android.content.res.TypedArray; |
| 13 | import android.provider.Browser; |
| 14 | import android.text.TextUtils; |
| 15 | import android.view.ActionMode; |
| 16 | import android.view.Menu; |
| 17 | import android.view.MenuItem; |
| 18 | |
| 19 | import org.chromium.content.R; |
| 20 | |
| 21 | /** |
| 22 | * An ActionMode.Callback for in-page selection. This class handles both the editable and |
| 23 | * non-editable cases. |
| 24 | */ |
| 25 | public class SelectActionModeCallback implements ActionMode.Callback { |
| 26 | private static final int SELECT_ALL_ATTR_INDEX = 0; |
| 27 | private static final int CUT_ATTR_INDEX = 1; |
| 28 | private static final int COPY_ATTR_INDEX = 2; |
| 29 | private static final int PASTE_ATTR_INDEX = 3; |
| 30 | private static final int[] ACTION_MODE_ATTRS = { |
| 31 | android.R.attr.actionModeSelectAllDrawable, |
| 32 | android.R.attr.actionModeCutDrawable, |
| 33 | android.R.attr.actionModeCopyDrawable, |
| 34 | android.R.attr.actionModePasteDrawable, |
| 35 | }; |
| 36 | |
| 37 | private static final int ID_SELECTALL = 0; |
| 38 | private static final int ID_COPY = 1; |
| 39 | private static final int ID_SHARE = 2; |
| 40 | private static final int ID_SEARCH = 3; |
| 41 | private static final int ID_CUT = 4; |
| 42 | private static final int ID_PASTE = 5; |
| 43 | |
| 44 | /** |
| 45 | * An interface to retrieve information about the current selection, and also to perform |
| 46 | * actions based on the selection or when the action bar is dismissed. |
| 47 | */ |
| 48 | public interface ActionHandler { |
| 49 | /** |
| 50 | * Perform a select all action. |
| 51 | * @return true iff the action was successful. |
| 52 | */ |
| 53 | boolean selectAll(); |
| 54 | |
| 55 | /** |
| 56 | * Perform a copy (to clipboard) action. |
| 57 | * @return true iff the action was successful. |
| 58 | */ |
| 59 | boolean copy(); |
| 60 | |
| 61 | /** |
| 62 | * Perform a cut (to clipboard) action. |
| 63 | * @return true iff the action was successful. |
| 64 | */ |
| 65 | boolean cut(); |
| 66 | |
| 67 | /** |
| 68 | * Perform a paste action. |
| 69 | * @return true iff the action was successful. |
| 70 | */ |
| 71 | boolean paste(); |
| 72 | |
| 73 | /** |
| 74 | * @return true iff the current selection is editable (e.g. text within an input field). |
| 75 | */ |
| 76 | boolean isSelectionEditable(); |
| 77 | |
| 78 | /** |
| 79 | * @return the currently selected text String. |
| 80 | */ |
| 81 | String getSelectedText(); |
| 82 | |
| 83 | /** |
| 84 | * Called when the onDestroyActionMode of the SelectActionmodeCallback is called. |
| 85 | */ |
| 86 | void onDestroyActionMode(); |
| 87 | } |
| 88 | |
| 89 | private Context mContext; |
| 90 | private ActionHandler mActionHandler; |
| 91 | private final boolean mIncognito; |
| 92 | private boolean mEditable; |
| 93 | |
| 94 | protected SelectActionModeCallback( |
| 95 | Context context, ActionHandler actionHandler, boolean incognito) { |
| 96 | mContext = context; |
| 97 | mActionHandler = actionHandler; |
| 98 | mIncognito = incognito; |
| 99 | } |
| 100 | |
| 101 | protected Context getContext() { |
| 102 | return mContext; |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public boolean onCreateActionMode(ActionMode mode, Menu menu) { |
| 107 | mode.setTitle(null); |
| 108 | mode.setSubtitle(null); |
| 109 | mEditable = mActionHandler.isSelectionEditable(); |
| 110 | createActionMenu(mode, menu); |
| 111 | return true; |
| 112 | } |
| 113 | |
| 114 | @Override |
| 115 | public boolean onPrepareActionMode(ActionMode mode, Menu menu) { |
| 116 | boolean isEditableNow = mActionHandler.isSelectionEditable(); |
| 117 | if (mEditable != isEditableNow) { |
| 118 | mEditable = isEditableNow; |
| 119 | menu.clear(); |
| 120 | createActionMenu(mode, menu); |
| 121 | return true; |
| 122 | } |
| 123 | return false; |
| 124 | } |
| 125 | |
| 126 | private void createActionMenu(ActionMode mode, Menu menu) { |
| 127 | TypedArray styledAttributes = getContext().obtainStyledAttributes(ACTION_MODE_ATTRS); |
| 128 | |
| 129 | menu.add(Menu.NONE, ID_SELECTALL, Menu.NONE, android.R.string.selectAll). |
| 130 | setAlphabeticShortcut('a'). |
| 131 | setIcon(styledAttributes.getResourceId(SELECT_ALL_ATTR_INDEX, 0)). |
| 132 | setShowAsAction( |
| 133 | MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); |
| 134 | |
| 135 | if (mEditable) { |
| 136 | menu.add(Menu.NONE, ID_CUT, Menu.NONE, android.R.string.cut). |
| 137 | setIcon(styledAttributes.getResourceId(CUT_ATTR_INDEX, 0)). |
| 138 | setAlphabeticShortcut('x'). |
| 139 | setShowAsAction( |
| 140 | MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); |
| 141 | } |
| 142 | |
| 143 | menu.add(Menu.NONE, ID_COPY, Menu.NONE, android.R.string.copy). |
| 144 | setIcon(styledAttributes.getResourceId(COPY_ATTR_INDEX, 0)). |
| 145 | setAlphabeticShortcut('c'). |
| 146 | setShowAsAction( |
| 147 | MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); |
| 148 | |
| 149 | if (mEditable && canPaste()) { |
| 150 | menu.add(Menu.NONE, ID_PASTE, Menu.NONE, android.R.string.paste). |
| 151 | setIcon(styledAttributes.getResourceId(PASTE_ATTR_INDEX, 0)). |
| 152 | setAlphabeticShortcut('v'). |
| 153 | setShowAsAction( |
| 154 | MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); |
| 155 | } |
| 156 | |
| 157 | if (!mEditable) { |
| 158 | if (isShareHandlerAvailable()) { |
| 159 | menu.add(Menu.NONE, ID_SHARE, Menu.NONE, R.string.actionbar_share). |
| 160 | setIcon(R.drawable.ic_menu_share_holo_light). |
| 161 | setShowAsAction( |
| 162 | MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); |
| 163 | } |
| 164 | |
| 165 | if (!mIncognito && isWebSearchAvailable()) { |
| 166 | menu.add(Menu.NONE, ID_SEARCH, Menu.NONE, R.string.actionbar_web_search). |
| 167 | setIcon(R.drawable.ic_menu_search_holo_light). |
| 168 | setShowAsAction( |
| 169 | MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | styledAttributes.recycle(); |
| 174 | } |
| 175 | |
| 176 | @Override |
| 177 | public boolean onActionItemClicked(ActionMode mode, MenuItem item) { |
| 178 | String selection = mActionHandler.getSelectedText(); |
| 179 | switch(item.getItemId()) { |
| 180 | case ID_SELECTALL: |
| 181 | mActionHandler.selectAll(); |
| 182 | break; |
| 183 | case ID_CUT: |
| 184 | mActionHandler.cut(); |
| 185 | break; |
| 186 | case ID_COPY: |
| 187 | mActionHandler.copy(); |
| 188 | mode.finish(); |
| 189 | break; |
| 190 | case ID_PASTE: |
| 191 | mActionHandler.paste(); |
| 192 | break; |
| 193 | case ID_SHARE: |
| 194 | if (!TextUtils.isEmpty(selection)) { |
| 195 | Intent send = new Intent(Intent.ACTION_SEND); |
| 196 | send.setType("text/plain"); |
| 197 | send.putExtra(Intent.EXTRA_TEXT, selection); |
| 198 | try { |
| 199 | Intent i = Intent.createChooser(send, getContext().getString( |
| 200 | R.string.actionbar_share)); |
| 201 | i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); |
| 202 | getContext().startActivity(i); |
| 203 | } catch (android.content.ActivityNotFoundException ex) { |
| 204 | // If no app handles it, do nothing. |
| 205 | } |
| 206 | } |
| 207 | mode.finish(); |
| 208 | break; |
| 209 | case ID_SEARCH: |
| 210 | if (!TextUtils.isEmpty(selection)) { |
| 211 | Intent i = new Intent(Intent.ACTION_WEB_SEARCH); |
| 212 | i.putExtra(SearchManager.EXTRA_NEW_SEARCH, true); |
| 213 | i.putExtra(SearchManager.QUERY, selection); |
| 214 | i.putExtra(Browser.EXTRA_APPLICATION_ID, getContext().getPackageName()); |
| 215 | try { |
| 216 | getContext().startActivity(i); |
| 217 | } catch (android.content.ActivityNotFoundException ex) { |
| 218 | // If no app handles it, do nothing. |
| 219 | } |
| 220 | } |
| 221 | mode.finish(); |
| 222 | break; |
| 223 | default: |
| 224 | return false; |
| 225 | } |
| 226 | return true; |
| 227 | } |
| 228 | |
| 229 | @Override |
| 230 | public void onDestroyActionMode(ActionMode mode) { |
| 231 | mActionHandler.onDestroyActionMode(); |
| 232 | } |
| 233 | |
| 234 | private boolean canPaste() { |
| 235 | ClipboardManager clipMgr = (ClipboardManager) |
| 236 | getContext().getSystemService(Context.CLIPBOARD_SERVICE); |
| 237 | return clipMgr.hasPrimaryClip(); |
| 238 | } |
| 239 | |
| 240 | private boolean isShareHandlerAvailable() { |
| 241 | Intent intent = new Intent(Intent.ACTION_SEND); |
| 242 | intent.setType("text/plain"); |
| 243 | return getContext().getPackageManager() |
| 244 | .queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY).size() > 0; |
| 245 | } |
| 246 | |
| 247 | private boolean isWebSearchAvailable() { |
| 248 | Intent intent = new Intent(Intent.ACTION_WEB_SEARCH); |
| 249 | intent.putExtra(SearchManager.EXTRA_NEW_SEARCH, true); |
| 250 | return getContext().getPackageManager() |
| 251 | .queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY).size() > 0; |
| 252 | } |
| 253 | } |