| /* |
| * Copyright (C) 2016 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 android.view.inputmethod; |
| |
| import static java.lang.annotation.RetentionPolicy.SOURCE; |
| |
| import android.annotation.IntDef; |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.os.Bundle; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.WeakHashMap; |
| |
| /** |
| * @hide |
| */ |
| public final class InputConnectionInspector { |
| |
| @Retention(SOURCE) |
| @IntDef({MissingMethodFlags.GET_SELECTED_TEXT, |
| MissingMethodFlags.SET_COMPOSING_REGION, |
| MissingMethodFlags.COMMIT_CORRECTION, |
| MissingMethodFlags.REQUEST_CURSOR_UPDATES, |
| MissingMethodFlags.DELETE_SURROUNDING_TEXT_IN_CODE_POINTS, |
| MissingMethodFlags.GET_HANDLER, |
| MissingMethodFlags.CLOSE_CONNECTION, |
| MissingMethodFlags.COMMIT_CONTENT, |
| }) |
| public @interface MissingMethodFlags { |
| /** |
| * {@link InputConnection#getSelectedText(int)} is available in |
| * {@link android.os.Build.VERSION_CODES#GINGERBREAD} and later. |
| */ |
| int GET_SELECTED_TEXT = 1 << 0; |
| /** |
| * {@link InputConnection#setComposingRegion(int, int)} is available in |
| * {@link android.os.Build.VERSION_CODES#GINGERBREAD} and later. |
| */ |
| int SET_COMPOSING_REGION = 1 << 1; |
| /** |
| * {@link InputConnection#commitCorrection(CorrectionInfo)} is available in |
| * {@link android.os.Build.VERSION_CODES#HONEYCOMB} and later. |
| */ |
| int COMMIT_CORRECTION = 1 << 2; |
| /** |
| * {@link InputConnection#requestCursorUpdates(int)} is available in |
| * {@link android.os.Build.VERSION_CODES#LOLLIPOP} and later. |
| */ |
| int REQUEST_CURSOR_UPDATES = 1 << 3; |
| /** |
| * {@link InputConnection#deleteSurroundingTextInCodePoints(int, int)}} is available in |
| * {@link android.os.Build.VERSION_CODES#N} and later. |
| */ |
| int DELETE_SURROUNDING_TEXT_IN_CODE_POINTS = 1 << 4; |
| /** |
| * {@link InputConnection#deleteSurroundingTextInCodePoints(int, int)}} is available in |
| * {@link android.os.Build.VERSION_CODES#N} and later. |
| */ |
| int GET_HANDLER = 1 << 5; |
| /** |
| * {@link InputConnection#closeConnection()}} is available in |
| * {@link android.os.Build.VERSION_CODES#N} and later. |
| */ |
| int CLOSE_CONNECTION = 1 << 6; |
| /** |
| * {@link InputConnection#commitContent(InputContentInfo, int, Bundle)} is available in |
| * {@link android.os.Build.VERSION_CODES#N} MR-1 and later. |
| */ |
| int COMMIT_CONTENT = 1 << 7; |
| } |
| |
| private static final Map<Class, Integer> sMissingMethodsMap = Collections.synchronizedMap( |
| new WeakHashMap<>()); |
| |
| @MissingMethodFlags |
| public static int getMissingMethodFlags(@Nullable final InputConnection ic) { |
| if (ic == null) { |
| return 0; |
| } |
| // Optimization for a known class. |
| if (ic instanceof BaseInputConnection) { |
| return 0; |
| } |
| // Optimization for a known class. |
| if (ic instanceof InputConnectionWrapper) { |
| return ((InputConnectionWrapper) ic).getMissingMethodFlags(); |
| } |
| return getMissingMethodFlagsInternal(ic.getClass()); |
| } |
| |
| @MissingMethodFlags |
| public static int getMissingMethodFlagsInternal(@NonNull final Class clazz) { |
| final Integer cachedFlags = sMissingMethodsMap.get(clazz); |
| if (cachedFlags != null) { |
| return cachedFlags; |
| } |
| int flags = 0; |
| if (!hasGetSelectedText(clazz)) { |
| flags |= MissingMethodFlags.GET_SELECTED_TEXT; |
| } |
| if (!hasSetComposingRegion(clazz)) { |
| flags |= MissingMethodFlags.SET_COMPOSING_REGION; |
| } |
| if (!hasCommitCorrection(clazz)) { |
| flags |= MissingMethodFlags.COMMIT_CORRECTION; |
| } |
| if (!hasRequestCursorUpdate(clazz)) { |
| flags |= MissingMethodFlags.REQUEST_CURSOR_UPDATES; |
| } |
| if (!hasDeleteSurroundingTextInCodePoints(clazz)) { |
| flags |= MissingMethodFlags.DELETE_SURROUNDING_TEXT_IN_CODE_POINTS; |
| } |
| if (!hasGetHandler(clazz)) { |
| flags |= MissingMethodFlags.GET_HANDLER; |
| } |
| if (!hasCloseConnection(clazz)) { |
| flags |= MissingMethodFlags.CLOSE_CONNECTION; |
| } |
| if (!hasCommitContent(clazz)) { |
| flags |= MissingMethodFlags.COMMIT_CONTENT; |
| } |
| sMissingMethodsMap.put(clazz, flags); |
| return flags; |
| } |
| |
| private static boolean hasGetSelectedText(@NonNull final Class clazz) { |
| try { |
| final Method method = clazz.getMethod("getSelectedText", int.class); |
| return !Modifier.isAbstract(method.getModifiers()); |
| } catch (NoSuchMethodException e) { |
| return false; |
| } |
| } |
| |
| private static boolean hasSetComposingRegion(@NonNull final Class clazz) { |
| try { |
| final Method method = clazz.getMethod("setComposingRegion", int.class, int.class); |
| return !Modifier.isAbstract(method.getModifiers()); |
| } catch (NoSuchMethodException e) { |
| return false; |
| } |
| } |
| |
| private static boolean hasCommitCorrection(@NonNull final Class clazz) { |
| try { |
| final Method method = clazz.getMethod("commitCorrection", CorrectionInfo.class); |
| return !Modifier.isAbstract(method.getModifiers()); |
| } catch (NoSuchMethodException e) { |
| return false; |
| } |
| } |
| |
| private static boolean hasRequestCursorUpdate(@NonNull final Class clazz) { |
| try { |
| final Method method = clazz.getMethod("requestCursorUpdates", int.class); |
| return !Modifier.isAbstract(method.getModifiers()); |
| } catch (NoSuchMethodException e) { |
| return false; |
| } |
| } |
| |
| private static boolean hasDeleteSurroundingTextInCodePoints(@NonNull final Class clazz) { |
| try { |
| final Method method = clazz.getMethod("deleteSurroundingTextInCodePoints", int.class, |
| int.class); |
| return !Modifier.isAbstract(method.getModifiers()); |
| } catch (NoSuchMethodException e) { |
| return false; |
| } |
| } |
| |
| private static boolean hasGetHandler(@NonNull final Class clazz) { |
| try { |
| final Method method = clazz.getMethod("getHandler"); |
| return !Modifier.isAbstract(method.getModifiers()); |
| } catch (NoSuchMethodException e) { |
| return false; |
| } |
| } |
| |
| private static boolean hasCloseConnection(@NonNull final Class clazz) { |
| try { |
| final Method method = clazz.getMethod("closeConnection"); |
| return !Modifier.isAbstract(method.getModifiers()); |
| } catch (NoSuchMethodException e) { |
| return false; |
| } |
| } |
| |
| private static boolean hasCommitContent(@NonNull final Class clazz) { |
| try { |
| final Method method = clazz.getMethod("commitContent", InputContentInfo.class, |
| int.class, Bundle.class); |
| return !Modifier.isAbstract(method.getModifiers()); |
| } catch (NoSuchMethodException e) { |
| return false; |
| } |
| } |
| |
| public static String getMissingMethodFlagsAsString(@MissingMethodFlags final int flags) { |
| final StringBuilder sb = new StringBuilder(); |
| boolean isEmpty = true; |
| if ((flags & MissingMethodFlags.GET_SELECTED_TEXT) != 0) { |
| sb.append("getSelectedText(int)"); |
| isEmpty = false; |
| } |
| if ((flags & MissingMethodFlags.SET_COMPOSING_REGION) != 0) { |
| if (!isEmpty) { |
| sb.append(","); |
| } |
| sb.append("setComposingRegion(int, int)"); |
| isEmpty = false; |
| } |
| if ((flags & MissingMethodFlags.COMMIT_CORRECTION) != 0) { |
| if (!isEmpty) { |
| sb.append(","); |
| } |
| sb.append("commitCorrection(CorrectionInfo)"); |
| isEmpty = false; |
| } |
| if ((flags & MissingMethodFlags.REQUEST_CURSOR_UPDATES) != 0) { |
| if (!isEmpty) { |
| sb.append(","); |
| } |
| sb.append("requestCursorUpdate(int)"); |
| isEmpty = false; |
| } |
| if ((flags & MissingMethodFlags.DELETE_SURROUNDING_TEXT_IN_CODE_POINTS) != 0) { |
| if (!isEmpty) { |
| sb.append(","); |
| } |
| sb.append("deleteSurroundingTextInCodePoints(int, int)"); |
| isEmpty = false; |
| } |
| if ((flags & MissingMethodFlags.GET_HANDLER) != 0) { |
| if (!isEmpty) { |
| sb.append(","); |
| } |
| sb.append("getHandler()"); |
| } |
| if ((flags & MissingMethodFlags.CLOSE_CONNECTION) != 0) { |
| if (!isEmpty) { |
| sb.append(","); |
| } |
| sb.append("closeConnection()"); |
| } |
| if ((flags & MissingMethodFlags.COMMIT_CONTENT) != 0) { |
| if (!isEmpty) { |
| sb.append(","); |
| } |
| sb.append("commitContent(InputContentInfo, Bundle)"); |
| } |
| return sb.toString(); |
| } |
| } |