diff options
Diffstat (limited to 'src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java')
| -rw-r--r-- | src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java | 434 |
1 files changed, 434 insertions, 0 deletions
diff --git a/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java new file mode 100644 index 000000000..fe7b25edd --- /dev/null +++ b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java @@ -0,0 +1,434 @@ +package com.android.launcher3.accessibility; + +import android.annotation.TargetApi; +import android.app.AlertDialog; +import android.appwidget.AppWidgetProviderInfo; +import android.content.DialogInterface; +import android.graphics.Rect; +import android.os.Build; +import android.os.Bundle; +import android.os.Handler; +import android.text.TextUtils; +import android.util.Log; +import android.util.SparseArray; +import android.view.View; +import android.view.View.AccessibilityDelegate; +import android.view.accessibility.AccessibilityNodeInfo; +import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction; + +import com.android.launcher3.AppInfo; +import com.android.launcher3.AppWidgetResizeFrame; +import com.android.launcher3.CellLayout; +import com.android.launcher3.DeleteDropTarget; +import com.android.launcher3.DragController.DragListener; +import com.android.launcher3.DragSource; +import com.android.launcher3.Folder; +import com.android.launcher3.FolderInfo; +import com.android.launcher3.InfoDropTarget; +import com.android.launcher3.ItemInfo; +import com.android.launcher3.Launcher; +import com.android.launcher3.LauncherAppWidgetHostView; +import com.android.launcher3.LauncherAppWidgetInfo; +import com.android.launcher3.LauncherModel; +import com.android.launcher3.LauncherSettings; +import com.android.launcher3.PendingAddItemInfo; +import com.android.launcher3.R; +import com.android.launcher3.ShortcutInfo; +import com.android.launcher3.UninstallDropTarget; +import com.android.launcher3.Workspace; +import com.android.launcher3.util.Thunk; + +import java.util.ArrayList; + +@TargetApi(Build.VERSION_CODES.LOLLIPOP) +public class LauncherAccessibilityDelegate extends AccessibilityDelegate implements DragListener { + + private static final String TAG = "LauncherAccessibilityDelegate"; + + private static final int REMOVE = R.id.action_remove; + private static final int INFO = R.id.action_info; + private static final int UNINSTALL = R.id.action_uninstall; + private static final int ADD_TO_WORKSPACE = R.id.action_add_to_workspace; + private static final int MOVE = R.id.action_move; + private static final int MOVE_TO_WORKSPACE = R.id.action_move_to_workspace; + private static final int RESIZE = R.id.action_resize; + + public enum DragType { + ICON, + FOLDER, + WIDGET + } + + public static class DragInfo { + public DragType dragType; + public ItemInfo info; + public View item; + } + + private final SparseArray<AccessibilityAction> mActions = new SparseArray<>(); + @Thunk final Launcher mLauncher; + + private DragInfo mDragInfo = null; + private AccessibilityDragSource mDragSource = null; + + public LauncherAccessibilityDelegate(Launcher launcher) { + mLauncher = launcher; + + mActions.put(REMOVE, new AccessibilityAction(REMOVE, + launcher.getText(R.string.delete_target_label))); + mActions.put(INFO, new AccessibilityAction(INFO, + launcher.getText(R.string.info_target_label))); + mActions.put(UNINSTALL, new AccessibilityAction(UNINSTALL, + launcher.getText(R.string.delete_target_uninstall_label))); + mActions.put(ADD_TO_WORKSPACE, new AccessibilityAction(ADD_TO_WORKSPACE, + launcher.getText(R.string.action_add_to_workspace))); + mActions.put(MOVE, new AccessibilityAction(MOVE, + launcher.getText(R.string.action_move))); + mActions.put(MOVE_TO_WORKSPACE, new AccessibilityAction(MOVE_TO_WORKSPACE, + launcher.getText(R.string.action_move_to_workspace))); + mActions.put(RESIZE, new AccessibilityAction(RESIZE, + launcher.getText(R.string.action_resize))); + } + + @Override + public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { + super.onInitializeAccessibilityNodeInfo(host, info); + if (!(host.getTag() instanceof ItemInfo)) return; + ItemInfo item = (ItemInfo) host.getTag(); + + if (DeleteDropTarget.supportsDrop(item)) { + info.addAction(mActions.get(REMOVE)); + } + if (UninstallDropTarget.supportsDrop(host.getContext(), item)) { + info.addAction(mActions.get(UNINSTALL)); + } + if (InfoDropTarget.supportsDrop(host.getContext(), item)) { + info.addAction(mActions.get(INFO)); + } + + if ((item instanceof ShortcutInfo) + || (item instanceof LauncherAppWidgetInfo) + || (item instanceof FolderInfo)) { + info.addAction(mActions.get(MOVE)); + + if (item.container >= 0) { + info.addAction(mActions.get(MOVE_TO_WORKSPACE)); + } else if (item instanceof LauncherAppWidgetInfo) { + if (!getSupportedResizeActions(host, (LauncherAppWidgetInfo) item).isEmpty()) { + info.addAction(mActions.get(RESIZE)); + } + } + } if ((item instanceof AppInfo) || (item instanceof PendingAddItemInfo)) { + info.addAction(mActions.get(ADD_TO_WORKSPACE)); + } + } + + @Override + public boolean performAccessibilityAction(View host, int action, Bundle args) { + if ((host.getTag() instanceof ItemInfo) + && performAction(host, (ItemInfo) host.getTag(), action)) { + return true; + } + return super.performAccessibilityAction(host, action, args); + } + + public boolean performAction(final View host, final ItemInfo item, int action) { + if (action == REMOVE) { + if (DeleteDropTarget.removeWorkspaceOrFolderItem(mLauncher, item, host)) { + announceConfirmation(R.string.item_removed); + return true; + } + return false; + } else if (action == INFO) { + InfoDropTarget.startDetailsActivityForInfo(item, mLauncher); + return true; + } else if (action == UNINSTALL) { + return UninstallDropTarget.startUninstallActivity(mLauncher, item); + } else if (action == MOVE) { + beginAccessibleDrag(host, item); + } else if (action == ADD_TO_WORKSPACE) { + final int[] coordinates = new int[2]; + final long screenId = findSpaceOnWorkspace(item, coordinates); + mLauncher.showWorkspace(true, new Runnable() { + + @Override + public void run() { + if (item instanceof AppInfo) { + ShortcutInfo info = ((AppInfo) item).makeShortcut(); + LauncherModel.addItemToDatabase(mLauncher, info, + LauncherSettings.Favorites.CONTAINER_DESKTOP, + screenId, coordinates[0], coordinates[1]); + + ArrayList<ItemInfo> itemList = new ArrayList<>(); + itemList.add(info); + mLauncher.bindItems(itemList, 0, itemList.size(), true); + } else if (item instanceof PendingAddItemInfo) { + PendingAddItemInfo info = (PendingAddItemInfo) item; + Workspace workspace = mLauncher.getWorkspace(); + workspace.snapToPage(workspace.getPageIndexForScreenId(screenId)); + mLauncher.addPendingItem(info, LauncherSettings.Favorites.CONTAINER_DESKTOP, + screenId, coordinates, info.spanX, info.spanY); + } + announceConfirmation(R.string.item_added_to_workspace); + } + }); + return true; + } else if (action == MOVE_TO_WORKSPACE) { + Folder folder = mLauncher.getWorkspace().getOpenFolder(); + mLauncher.closeFolder(folder); + ShortcutInfo info = (ShortcutInfo) item; + folder.getInfo().remove(info); + + final int[] coordinates = new int[2]; + final long screenId = findSpaceOnWorkspace(item, coordinates); + LauncherModel.moveItemInDatabase(mLauncher, info, + LauncherSettings.Favorites.CONTAINER_DESKTOP, + screenId, coordinates[0], coordinates[1]); + + // Bind the item in next frame so that if a new workspace page was created, + // it will get laid out. + new Handler().post(new Runnable() { + + @Override + public void run() { + ArrayList<ItemInfo> itemList = new ArrayList<>(); + itemList.add(item); + mLauncher.bindItems(itemList, 0, itemList.size(), true); + announceConfirmation(R.string.item_moved); + } + }); + } else if (action == RESIZE) { + final LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) item; + final ArrayList<Integer> actions = getSupportedResizeActions(host, info); + CharSequence[] labels = new CharSequence[actions.size()]; + for (int i = 0; i < actions.size(); i++) { + labels[i] = mLauncher.getText(actions.get(i)); + } + + new AlertDialog.Builder(mLauncher) + .setTitle(R.string.action_resize) + .setItems(labels, new DialogInterface.OnClickListener() { + + @Override + public void onClick(DialogInterface dialog, int which) { + performResizeAction(actions.get(which), host, info); + dialog.dismiss(); + } + }) + .show(); + } + return false; + } + + private ArrayList<Integer> getSupportedResizeActions(View host, LauncherAppWidgetInfo info) { + ArrayList<Integer> actions = new ArrayList<>(); + + AppWidgetProviderInfo providerInfo = ((LauncherAppWidgetHostView) host).getAppWidgetInfo(); + if (providerInfo == null) { + return actions; + } + + CellLayout layout = (CellLayout) host.getParent().getParent(); + if ((providerInfo.resizeMode & AppWidgetProviderInfo.RESIZE_HORIZONTAL) != 0) { + if (layout.isRegionVacant(info.cellX + info.spanX, info.cellY, 1, info.spanY) || + layout.isRegionVacant(info.cellX - 1, info.cellY, 1, info.spanY)) { + actions.add(R.string.action_increase_width); + } + + if (info.spanX > info.minSpanX && info.spanX > 1) { + actions.add(R.string.action_decrease_width); + } + } + + if ((providerInfo.resizeMode & AppWidgetProviderInfo.RESIZE_VERTICAL) != 0) { + if (layout.isRegionVacant(info.cellX, info.cellY + info.spanY, info.spanX, 1) || + layout.isRegionVacant(info.cellX, info.cellY - 1, info.spanX, 1)) { + actions.add(R.string.action_increase_height); + } + + if (info.spanY > info.minSpanY && info.spanY > 1) { + actions.add(R.string.action_decrease_height); + } + } + return actions; + } + + @Thunk void performResizeAction(int action, View host, LauncherAppWidgetInfo info) { + CellLayout.LayoutParams lp = (CellLayout.LayoutParams) host.getLayoutParams(); + CellLayout layout = (CellLayout) host.getParent().getParent(); + layout.markCellsAsUnoccupiedForView(host); + + if (action == R.string.action_increase_width) { + if (((host.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) + && layout.isRegionVacant(info.cellX - 1, info.cellY, 1, info.spanY)) + || !layout.isRegionVacant(info.cellX + info.spanX, info.cellY, 1, info.spanY)) { + lp.cellX --; + info.cellX --; + } + lp.cellHSpan ++; + info.spanX ++; + } else if (action == R.string.action_decrease_width) { + lp.cellHSpan --; + info.spanX --; + } else if (action == R.string.action_increase_height) { + if (!layout.isRegionVacant(info.cellX, info.cellY + info.spanY, info.spanX, 1)) { + lp.cellY --; + info.cellY --; + } + lp.cellVSpan ++; + info.spanY ++; + } else if (action == R.string.action_decrease_height) { + lp.cellVSpan --; + info.spanY --; + } + + layout.markCellsAsOccupiedForView(host); + Rect sizeRange = new Rect(); + AppWidgetResizeFrame.getWidgetSizeRanges(mLauncher, info.spanX, info.spanY, sizeRange); + ((LauncherAppWidgetHostView) host).updateAppWidgetSize(null, + sizeRange.left, sizeRange.top, sizeRange.right, sizeRange.bottom); + host.requestLayout(); + LauncherModel.updateItemInDatabase(mLauncher, info); + announceConfirmation(mLauncher.getString(R.string.widget_resized, info.spanX, info.spanY)); + } + + @Thunk void announceConfirmation(int resId) { + announceConfirmation(mLauncher.getResources().getString(resId)); + } + + @Thunk void announceConfirmation(String confirmation) { + mLauncher.getDragLayer().announceForAccessibility(confirmation); + + } + + public boolean isInAccessibleDrag() { + return mDragInfo != null; + } + + public DragInfo getDragInfo() { + return mDragInfo; + } + + /** + * @param clickedTarget the actual view that was clicked + * @param dropLocation relative to {@param clickedTarget}. If provided, its center is used + * as the actual drop location otherwise the views center is used. + */ + public void handleAccessibleDrop(View clickedTarget, Rect dropLocation, + String confirmation) { + if (!isInAccessibleDrag()) return; + + int[] loc = new int[2]; + if (dropLocation == null) { + loc[0] = clickedTarget.getWidth() / 2; + loc[1] = clickedTarget.getHeight() / 2; + } else { + loc[0] = dropLocation.centerX(); + loc[1] = dropLocation.centerY(); + } + + mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(clickedTarget, loc); + mLauncher.getDragController().completeAccessibleDrag(loc); + + if (!TextUtils.isEmpty(confirmation)) { + announceConfirmation(confirmation); + } + } + + public void beginAccessibleDrag(View item, ItemInfo info) { + mDragInfo = new DragInfo(); + mDragInfo.info = info; + mDragInfo.item = item; + mDragInfo.dragType = DragType.ICON; + if (info instanceof FolderInfo) { + mDragInfo.dragType = DragType.FOLDER; + } else if (info instanceof LauncherAppWidgetInfo) { + mDragInfo.dragType = DragType.WIDGET; + } + + CellLayout.CellInfo cellInfo = new CellLayout.CellInfo(item, info); + + Rect pos = new Rect(); + mLauncher.getDragLayer().getDescendantRectRelativeToSelf(item, pos); + mLauncher.getDragController().prepareAccessibleDrag(pos.centerX(), pos.centerY()); + + Workspace workspace = mLauncher.getWorkspace(); + + Folder folder = workspace.getOpenFolder(); + if (folder != null) { + if (folder.getItemsInReadingOrder().contains(item)) { + mDragSource = folder; + } else { + mLauncher.closeFolder(); + } + } + if (mDragSource == null) { + mDragSource = workspace; + } + mDragSource.enableAccessibleDrag(true); + mDragSource.startDrag(cellInfo, true); + + if (mLauncher.getDragController().isDragging()) { + mLauncher.getDragController().addDragListener(this); + } + } + + + @Override + public void onDragStart(DragSource source, Object info, int dragAction) { + // No-op + } + + @Override + public void onDragEnd() { + mLauncher.getDragController().removeDragListener(this); + mDragInfo = null; + if (mDragSource != null) { + mDragSource.enableAccessibleDrag(false); + mDragSource = null; + } + } + + public static interface AccessibilityDragSource { + void startDrag(CellLayout.CellInfo cellInfo, boolean accessible); + + void enableAccessibleDrag(boolean enable); + } + + /** + * Find empty space on the workspace and returns the screenId. + */ + private long findSpaceOnWorkspace(ItemInfo info, int[] outCoordinates) { + Workspace workspace = mLauncher.getWorkspace(); + ArrayList<Long> workspaceScreens = workspace.getScreenOrder(); + long screenId; + + // First check if there is space on the current screen. + int screenIndex = workspace.getCurrentPage(); + screenId = workspaceScreens.get(screenIndex); + CellLayout layout = (CellLayout) workspace.getPageAt(screenIndex); + + boolean found = layout.findCellForSpan(outCoordinates, info.spanX, info.spanY); + screenIndex = workspace.hasCustomContent() ? 1 : 0; + while (!found && screenIndex < workspaceScreens.size()) { + screenId = workspaceScreens.get(screenIndex); + layout = (CellLayout) workspace.getPageAt(screenIndex); + found = layout.findCellForSpan(outCoordinates, info.spanX, info.spanY); + screenIndex++; + } + + if (found) { + return screenId; + } + + workspace.addExtraEmptyScreen(); + screenId = workspace.commitExtraEmptyScreen(); + layout = workspace.getScreenWithId(screenId); + found = layout.findCellForSpan(outCoordinates, info.spanX, info.spanY); + + if (!found) { + Log.wtf(TAG, "Not enough space on an empty screen"); + } + return screenId; + } +} |