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Diffstat (limited to 'src/com/android/launcher3/accessibility/WorkspaceAccessibilityHelper.java')
| -rw-r--r-- | src/com/android/launcher3/accessibility/WorkspaceAccessibilityHelper.java | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/src/com/android/launcher3/accessibility/WorkspaceAccessibilityHelper.java b/src/com/android/launcher3/accessibility/WorkspaceAccessibilityHelper.java new file mode 100644 index 000000000..80ddc13b7 --- /dev/null +++ b/src/com/android/launcher3/accessibility/WorkspaceAccessibilityHelper.java @@ -0,0 +1,166 @@ +/* + * Copyright (C) 2015 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.launcher3.accessibility; + +import android.text.TextUtils; +import android.view.View; + +import com.android.launcher3.AppInfo; +import com.android.launcher3.CellLayout; +import com.android.launcher3.FolderInfo; +import com.android.launcher3.ItemInfo; +import com.android.launcher3.accessibility.LauncherAccessibilityDelegate.DragType; +import com.android.launcher3.R; +import com.android.launcher3.ShortcutInfo; + +/** + * Implementation of {@link DragAndDropAccessibilityDelegate} to support DnD on workspace. + */ +public class WorkspaceAccessibilityHelper extends DragAndDropAccessibilityDelegate { + + public WorkspaceAccessibilityHelper(CellLayout layout) { + super(layout); + } + + /** + * Find the virtual view id corresponding to the top left corner of any drop region by which + * the passed id is contained. For an icon, this is simply + */ + @Override + protected int intersectsValidDropTarget(int id) { + int mCountX = mView.getCountX(); + int mCountY = mView.getCountY(); + + int x = id % mCountX; + int y = id / mCountX; + LauncherAccessibilityDelegate.DragInfo dragInfo = mDelegate.getDragInfo(); + + if (dragInfo.dragType == DragType.WIDGET && mView.isHotseat()) { + return INVALID_POSITION; + } + + if (dragInfo.dragType == DragType.WIDGET) { + // For a widget, every cell must be vacant. In addition, we will return any valid + // drop target by which the passed id is contained. + boolean fits = false; + + // These represent the amount that we can back off if we hit a problem. They + // get consumed as we move up and to the right, trying new regions. + int spanX = dragInfo.info.spanX; + int spanY = dragInfo.info.spanY; + + for (int m = 0; m < spanX; m++) { + for (int n = 0; n < spanY; n++) { + + fits = true; + int x0 = x - m; + int y0 = y - n; + + if (x0 < 0 || y0 < 0) continue; + + for (int i = x0; i < x0 + spanX; i++) { + if (!fits) break; + for (int j = y0; j < y0 + spanY; j++) { + if (i >= mCountX || j >= mCountY || mView.isOccupied(i, j)) { + fits = false; + break; + } + } + } + if (fits) { + return x0 + mCountX * y0; + } + } + } + return INVALID_POSITION; + } else { + // For an icon, we simply check the view directly below + View child = mView.getChildAt(x, y); + if (child == null || child == dragInfo.item) { + // Empty cell. Good for an icon or folder. + return id; + } else if (dragInfo.dragType != DragType.FOLDER) { + // For icons, we can consider cells that have another icon or a folder. + ItemInfo info = (ItemInfo) child.getTag(); + if (info instanceof AppInfo || info instanceof FolderInfo || + info instanceof ShortcutInfo) { + return id; + } + } + return INVALID_POSITION; + } + } + + @Override + protected String getConfirmationForIconDrop(int id) { + int x = id % mView.getCountX(); + int y = id / mView.getCountX(); + LauncherAccessibilityDelegate.DragInfo dragInfo = mDelegate.getDragInfo(); + + View child = mView.getChildAt(x, y); + if (child == null || child == dragInfo.item) { + return mContext.getString(R.string.item_moved); + } else { + ItemInfo info = (ItemInfo) child.getTag(); + if (info instanceof AppInfo || info instanceof ShortcutInfo) { + return mContext.getString(R.string.folder_created); + + } else if (info instanceof FolderInfo) { + return mContext.getString(R.string.added_to_folder); + } + } + return ""; + } + + @Override + protected String getLocationDescriptionForIconDrop(int id) { + int x = id % mView.getCountX(); + int y = id / mView.getCountX(); + LauncherAccessibilityDelegate.DragInfo dragInfo = mDelegate.getDragInfo(); + + View child = mView.getChildAt(x, y); + if (child == null || child == dragInfo.item) { + if (mView.isHotseat()) { + return mContext.getString(R.string.move_to_hotseat_position, id + 1); + } else { + return mContext.getString(R.string.move_to_empty_cell, y + 1, x + 1); + } + } else { + ItemInfo info = (ItemInfo) child.getTag(); + if (info instanceof ShortcutInfo) { + return mContext.getString(R.string.create_folder_with, info.title); + } else if (info instanceof FolderInfo) { + if (TextUtils.isEmpty(info.title)) { + // Find the first item in the folder. + FolderInfo folder = (FolderInfo) info; + ShortcutInfo firstItem = null; + for (ShortcutInfo shortcut : folder.contents) { + if (firstItem == null || firstItem.rank > shortcut.rank) { + firstItem = shortcut; + } + } + + if (firstItem != null) { + return mContext.getString(R.string.add_to_folder_with_app, firstItem.title); + } + } + return mContext.getString(R.string.add_to_folder, info.title); + } + } + return ""; + } +} |