Prerequisites for TAPL

Adding things that will be used by TAPL.

1. Adding Ctrl+W to open widgets
2. Marking a UI element with shortcuts_and_widgets
id. Example of usage: we want to be sure we are in all apps.
A somewhat paranoid way to check this is to check that
apps_view is on, and workspace and overview_panel are off.
However, workspace is always in the hierarchy. We use
shortcuts_and_widgets instead.

Bug: 110103162
Test: Manual
Change-Id: I2a851e16c477f7ee895b459530bc5a1ff19e32f8

res/values/config.xml

@@ -149,4 +149,5 @@
     <integer name="config_recentsMaxThumbnailCacheSize">6</integer>
     <integer name="config_recentsMaxIconCacheSize">12</integer>
 
+    <item name="workspace_page_container" type="id" />
 </resources>

src/com/android/launcher3/Launcher.java

@@ -2328,6 +2328,8 @@ public class Launcher extends BaseDraggingActivity implements LauncherExterns,
         if (isInState(NORMAL)) {
             shortcutInfos.add(new KeyboardShortcutInfo(getString(R.string.all_apps_button_label),
                     KeyEvent.KEYCODE_A, KeyEvent.META_CTRL_ON));
+            shortcutInfos.add(new KeyboardShortcutInfo(getString(R.string.widget_button_text),
+                    KeyEvent.KEYCODE_W, KeyEvent.META_CTRL_ON));
         }
         final View currentFocus = getCurrentFocus();
         if (currentFocus != null) {
@@ -2376,6 +2378,12 @@ public class Launcher extends BaseDraggingActivity implements LauncherExterns,
                         return true;
                     }
                     break;
+                case KeyEvent.KEYCODE_W:
+                    if (isInState(NORMAL)) {
+                        OptionsPopupView.openWidgets(this);
+                        return true;
+                    }
+                    break;
             }
         }
         return super.onKeyShortcut(keyCode, event);

src/com/android/launcher3/Workspace.java

@@ -547,6 +547,7 @@ public class Workspace extends PagedView<WorkspacePageIndicator>
         // created CellLayout.
         CellLayout newScreen = (CellLayout) LayoutInflater.from(getContext()).inflate(
                         R.layout.workspace_screen, this, false /* attachToRoot */);
+        newScreen.getShortcutsAndWidgets().setId(R.id.workspace_page_container);
         int paddingLeftRight = mLauncher.getDeviceProfile().cellLayoutPaddingLeftRightPx;
         int paddingBottom = mLauncher.getDeviceProfile().cellLayoutBottomPaddingPx;
         newScreen.setPadding(paddingLeftRight, 0, paddingLeftRight, paddingBottom);

src/com/android/launcher3/views/OptionsPopupView.java

@@ -153,7 +153,10 @@ public class OptionsPopupView extends ArrowPopup
     }
 
     public static boolean onWidgetsClicked(View view) {
-        Launcher launcher = Launcher.getLauncher(view.getContext());
+        return openWidgets(Launcher.getLauncher(view.getContext()));
+    }
+
+    public static boolean openWidgets(Launcher launcher) {
         if (launcher.getPackageManager().isSafeMode()) {
             Toast.makeText(launcher, R.string.safemode_widget_error, Toast.LENGTH_SHORT).show();
             return false;