+++ /dev/null
-/*
- * Copyright (C) 2014 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.settings.widget;
-
-import android.graphics.Rect;
-import android.os.Bundle;
-import android.text.Layout;
-import android.text.Spanned;
-import android.text.style.ClickableSpan;
-import android.util.Log;
-import android.view.accessibility.AccessibilityEvent;
-import android.view.accessibility.AccessibilityNodeInfo;
-import android.widget.TextView;
-
-import java.util.List;
-
-/**
- * Copied from setup wizard.
- */
-public class LinkAccessibilityHelper extends ExploreByTouchHelper {
-
- private static final String TAG = "LinkAccessibilityHelper";
-
- private final TextView mView;
- private final Rect mTempRect = new Rect();
-
- public LinkAccessibilityHelper(TextView view) {
- super(view);
- mView = view;
- }
-
- @Override
- protected int getVirtualViewAt(float x, float y) {
- final CharSequence text = mView.getText();
- if (text instanceof Spanned) {
- final Spanned spannedText = (Spanned) text;
- final int offset = mView.getOffsetForPosition(x, y);
- ClickableSpan[] linkSpans = spannedText.getSpans(offset, offset, ClickableSpan.class);
- if (linkSpans.length == 1) {
- ClickableSpan linkSpan = linkSpans[0];
- return spannedText.getSpanStart(linkSpan);
- }
- }
- return INVALID_ID;
- }
-
- @Override
- protected void getVisibleVirtualViews(List<Integer> virtualViewIds) {
- final CharSequence text = mView.getText();
- if (text instanceof Spanned) {
- final Spanned spannedText = (Spanned) text;
- ClickableSpan[] linkSpans = spannedText.getSpans(0, spannedText.length(),
- ClickableSpan.class);
- for (ClickableSpan span : linkSpans) {
- virtualViewIds.add(spannedText.getSpanStart(span));
- }
- }
- }
-
- @Override
- protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
- final ClickableSpan span = getSpanForOffset(virtualViewId);
- if (span != null) {
- event.setContentDescription(getTextForSpan(span));
- } else {
- Log.e(TAG, "ClickableSpan is null for offset: " + virtualViewId);
- event.setContentDescription(mView.getText());
- }
- }
-
- @Override
- protected void onPopulateNodeForVirtualView(int virtualViewId, AccessibilityNodeInfo info) {
- final ClickableSpan span = getSpanForOffset(virtualViewId);
- if (span != null) {
- info.setContentDescription(getTextForSpan(span));
- } else {
- Log.e(TAG, "ClickableSpan is null for offset: " + virtualViewId);
- info.setContentDescription(mView.getText());
- }
- info.setFocusable(true);
- info.setClickable(true);
- getBoundsForSpan(span, mTempRect);
- if (!mTempRect.isEmpty()) {
- info.setBoundsInParent(getBoundsForSpan(span, mTempRect));
- } else {
- Log.e(TAG, "LinkSpan bounds is empty for: " + virtualViewId);
- mTempRect.set(0, 0, 1, 1);
- info.setBoundsInParent(mTempRect);
- }
- info.addAction(AccessibilityNodeInfo.ACTION_CLICK);
- }
-
- @Override
- protected boolean onPerformActionForVirtualView(int virtualViewId, int action,
- Bundle arguments) {
- if (action == AccessibilityNodeInfo.ACTION_CLICK) {
- ClickableSpan span = getSpanForOffset(virtualViewId);
- if (span != null) {
- span.onClick(mView);
- return true;
- } else {
- Log.e(TAG, "LinkSpan is null for offset: " + virtualViewId);
- }
- }
- return false;
- }
-
- private ClickableSpan getSpanForOffset(int offset) {
- CharSequence text = mView.getText();
- if (text instanceof Spanned) {
- Spanned spannedText = (Spanned) text;
- ClickableSpan[] spans = spannedText.getSpans(offset, offset, ClickableSpan.class);
- if (spans.length == 1) {
- return spans[0];
- }
- }
- return null;
- }
-
- private CharSequence getTextForSpan(ClickableSpan span) {
- CharSequence text = mView.getText();
- if (text instanceof Spanned) {
- Spanned spannedText = (Spanned) text;
- return spannedText.subSequence(spannedText.getSpanStart(span),
- spannedText.getSpanEnd(span));
- }
- return text;
- }
-
- // Find the bounds of a span. If it spans multiple lines, it will only return the bounds for the
- // section on the first line.
- private Rect getBoundsForSpan(ClickableSpan span, Rect outRect) {
- CharSequence text = mView.getText();
- outRect.setEmpty();
- if (text instanceof Spanned) {
- Spanned spannedText = (Spanned) text;
- final int spanStart = spannedText.getSpanStart(span);
- final int spanEnd = spannedText.getSpanEnd(span);
- final Layout layout = mView.getLayout();
- final float xStart = layout.getPrimaryHorizontal(spanStart);
- final float xEnd = layout.getPrimaryHorizontal(spanEnd);
- final int lineStart = layout.getLineForOffset(spanStart);
- final int lineEnd = layout.getLineForOffset(spanEnd);
- layout.getLineBounds(lineStart, outRect);
- outRect.left = (int) xStart;
- if (lineEnd == lineStart) {
- outRect.right = (int) xEnd;
- } // otherwise just leave it at the end of the start line
-
- // Offset for padding
- outRect.offset(mView.getTotalPaddingLeft(), mView.getTotalPaddingTop());
- }
- return outRect;
- }
-}
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