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/*
* 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.text.style;
import static android.view.accessibility.AccessibilityNodeInfo.ACTION_ARGUMENT_ACCESSIBLE_CLICKABLE_SPAN;
import static android.view.accessibility.AccessibilityNodeInfo.UNDEFINED_CONNECTION_ID;
import static android.view.accessibility.AccessibilityNodeInfo.UNDEFINED_NODE_ID;
import static android.view.accessibility.AccessibilityWindowInfo.UNDEFINED_WINDOW_ID;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.text.ParcelableSpan;
import android.text.Spanned;
import android.text.TextUtils;
import android.view.View;
import android.view.accessibility.AccessibilityInteractionClient;
import android.view.accessibility.AccessibilityNodeInfo;
import com.android.internal.R;
/**
* {@link ClickableSpan} cannot be parceled, but accessibility services need to be able to cause
* their callback handlers to be called. This class serves as a parcelable placeholder for the
* real spans.
*
* This span is also passed back to an app's process when an accessibility service tries to click
* it. It contains enough information to track down the original clickable span so it can be
* called.
*
* @hide
*/
public class AccessibilityClickableSpan extends ClickableSpan
implements ParcelableSpan {
// The id of the span this one replaces
private final int mOriginalClickableSpanId;
private int mWindowId = UNDEFINED_WINDOW_ID;
private long mSourceNodeId = UNDEFINED_NODE_ID;
private int mConnectionId = UNDEFINED_CONNECTION_ID;
/**
* @param originalClickableSpanId The id of the span this one replaces
*/
public AccessibilityClickableSpan(int originalClickableSpanId) {
mOriginalClickableSpanId = originalClickableSpanId;
}
public AccessibilityClickableSpan(Parcel p) {
mOriginalClickableSpanId = p.readInt();
}
@Override
public int getSpanTypeId() {
return getSpanTypeIdInternal();
}
@Override
public int getSpanTypeIdInternal() {
return TextUtils.ACCESSIBILITY_CLICKABLE_SPAN;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
writeToParcelInternal(dest, flags);
}
@Override
public void writeToParcelInternal(Parcel dest, int flags) {
dest.writeInt(mOriginalClickableSpanId);
}
/**
* Find the ClickableSpan that matches the one used to create this object.
*
* @param text The text that contains the original ClickableSpan.
* @return The ClickableSpan that matches this object, or {@code null} if no such object
* can be found.
*/
public ClickableSpan findClickableSpan(CharSequence text) {
if (!(text instanceof Spanned)) {
return null;
}
Spanned sp = (Spanned) text;
ClickableSpan[] os = sp.getSpans(0, text.length(), ClickableSpan.class);
for (int i = 0; i < os.length; i++) {
if (os[i].getId() == mOriginalClickableSpanId) {
return os[i];
}
}
return null;
}
/**
* Configure this object to perform clicks on the view that contains the original span.
*
* @param accessibilityNodeInfo The info corresponding to the view containing the original
* span.
*/
public void copyConnectionDataFrom(AccessibilityNodeInfo accessibilityNodeInfo) {
mConnectionId = accessibilityNodeInfo.getConnectionId();
mWindowId = accessibilityNodeInfo.getWindowId();
mSourceNodeId = accessibilityNodeInfo.getSourceNodeId();
}
/**
* Perform the click from an accessibility service. Will not work unless
* setAccessibilityNodeInfo is called with a properly initialized node.
*
* @param unused This argument is required by the superclass but is unused. The real view will
* be determined by the AccessibilityNodeInfo.
*/
@Override
public void onClick(View unused) {
Bundle arguments = new Bundle();
arguments.putParcelable(ACTION_ARGUMENT_ACCESSIBLE_CLICKABLE_SPAN, this);
if ((mWindowId == UNDEFINED_WINDOW_ID) || (mSourceNodeId == UNDEFINED_NODE_ID)
|| (mConnectionId == UNDEFINED_CONNECTION_ID)) {
throw new RuntimeException(
"ClickableSpan for accessibility service not properly initialized");
}
AccessibilityInteractionClient client = AccessibilityInteractionClient.getInstance();
client.performAccessibilityAction(mConnectionId, mWindowId, mSourceNodeId,
R.id.accessibilityActionClickOnClickableSpan, arguments);
}
public static final @android.annotation.NonNull Parcelable.Creator<AccessibilityClickableSpan> CREATOR =
new Parcelable.Creator<AccessibilityClickableSpan>() {
@Override
public AccessibilityClickableSpan createFromParcel(Parcel parcel) {
return new AccessibilityClickableSpan(parcel);
}
@Override
public AccessibilityClickableSpan[] newArray(int size) {
return new AccessibilityClickableSpan[size];
}
};
}
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