use of android.view.accessibility.AccessibilityNodeProvider in project android_frameworks_base by ResurrectionRemix.
the class ViewRootImpl method handleWindowContentChangedEvent.
/**
* Updates the focused virtual view, when necessary, in response to a
* content changed event.
* <p>
* This is necessary to get updated bounds after a position change.
*
* @param event an accessibility event of type
* {@link AccessibilityEvent#TYPE_WINDOW_CONTENT_CHANGED}
*/
private void handleWindowContentChangedEvent(AccessibilityEvent event) {
final View focusedHost = mAccessibilityFocusedHost;
if (focusedHost == null || mAccessibilityFocusedVirtualView == null) {
// No virtual view focused, nothing to do here.
return;
}
final AccessibilityNodeProvider provider = focusedHost.getAccessibilityNodeProvider();
if (provider == null) {
// Error state: virtual view with no provider. Clear focus.
mAccessibilityFocusedHost = null;
mAccessibilityFocusedVirtualView = null;
focusedHost.clearAccessibilityFocusNoCallbacks(0);
return;
}
// We only care about change types that may affect the bounds of the
// focused virtual view.
final int changes = event.getContentChangeTypes();
if ((changes & AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE) == 0 && changes != AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED) {
return;
}
final long eventSourceNodeId = event.getSourceNodeId();
final int changedViewId = AccessibilityNodeInfo.getAccessibilityViewId(eventSourceNodeId);
// Search up the tree for subtree containment.
boolean hostInSubtree = false;
View root = mAccessibilityFocusedHost;
while (root != null && !hostInSubtree) {
if (changedViewId == root.getAccessibilityViewId()) {
hostInSubtree = true;
} else {
final ViewParent parent = root.getParent();
if (parent instanceof View) {
root = (View) parent;
} else {
root = null;
}
}
}
// We care only about changes in subtrees containing the host view.
if (!hostInSubtree) {
return;
}
final long focusedSourceNodeId = mAccessibilityFocusedVirtualView.getSourceNodeId();
int focusedChildId = AccessibilityNodeInfo.getVirtualDescendantId(focusedSourceNodeId);
if (focusedChildId == AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
// TODO: Should we clear the focused virtual view?
focusedChildId = AccessibilityNodeProvider.HOST_VIEW_ID;
}
// Refresh the node for the focused virtual view.
final Rect oldBounds = mTempRect;
mAccessibilityFocusedVirtualView.getBoundsInScreen(oldBounds);
mAccessibilityFocusedVirtualView = provider.createAccessibilityNodeInfo(focusedChildId);
if (mAccessibilityFocusedVirtualView == null) {
// Error state: The node no longer exists. Clear focus.
mAccessibilityFocusedHost = null;
focusedHost.clearAccessibilityFocusNoCallbacks(0);
// This will probably fail, but try to keep the provider's internal
// state consistent by clearing focus.
provider.performAction(focusedChildId, AccessibilityAction.ACTION_CLEAR_ACCESSIBILITY_FOCUS.getId(), null);
invalidateRectOnScreen(oldBounds);
} else {
// The node was refreshed, invalidate bounds if necessary.
final Rect newBounds = mAccessibilityFocusedVirtualView.getBoundsInScreen();
if (!oldBounds.equals(newBounds)) {
oldBounds.union(newBounds);
invalidateRectOnScreen(oldBounds);
}
}
}
use of android.view.accessibility.AccessibilityNodeProvider in project android_frameworks_base by ResurrectionRemix.
the class AccessibilityInteractionController method findAccessibilityNodeInfosByTextUiThread.
private void findAccessibilityNodeInfosByTextUiThread(Message message) {
final int flags = message.arg1;
SomeArgs args = (SomeArgs) message.obj;
final String text = (String) args.arg1;
final IAccessibilityInteractionConnectionCallback callback = (IAccessibilityInteractionConnectionCallback) args.arg2;
final MagnificationSpec spec = (MagnificationSpec) args.arg3;
final int accessibilityViewId = args.argi1;
final int virtualDescendantId = args.argi2;
final int interactionId = args.argi3;
final Region interactiveRegion = (Region) args.arg4;
args.recycle();
List<AccessibilityNodeInfo> infos = null;
try {
if (mViewRootImpl.mView == null || mViewRootImpl.mAttachInfo == null) {
return;
}
mViewRootImpl.mAttachInfo.mAccessibilityFetchFlags = flags;
View root = null;
if (accessibilityViewId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
root = findViewByAccessibilityId(accessibilityViewId);
} else {
root = mViewRootImpl.mView;
}
if (root != null && isShown(root)) {
AccessibilityNodeProvider provider = root.getAccessibilityNodeProvider();
if (provider != null) {
if (virtualDescendantId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
infos = provider.findAccessibilityNodeInfosByText(text, virtualDescendantId);
} else {
infos = provider.findAccessibilityNodeInfosByText(text, AccessibilityNodeProvider.HOST_VIEW_ID);
}
} else if (virtualDescendantId == AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
ArrayList<View> foundViews = mTempArrayList;
foundViews.clear();
root.findViewsWithText(foundViews, text, View.FIND_VIEWS_WITH_TEXT | View.FIND_VIEWS_WITH_CONTENT_DESCRIPTION | View.FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS);
if (!foundViews.isEmpty()) {
infos = mTempAccessibilityNodeInfoList;
infos.clear();
final int viewCount = foundViews.size();
for (int i = 0; i < viewCount; i++) {
View foundView = foundViews.get(i);
if (isShown(foundView)) {
provider = foundView.getAccessibilityNodeProvider();
if (provider != null) {
List<AccessibilityNodeInfo> infosFromProvider = provider.findAccessibilityNodeInfosByText(text, AccessibilityNodeProvider.HOST_VIEW_ID);
if (infosFromProvider != null) {
infos.addAll(infosFromProvider);
}
} else {
infos.add(foundView.createAccessibilityNodeInfo());
}
}
}
}
}
}
} finally {
try {
mViewRootImpl.mAttachInfo.mAccessibilityFetchFlags = 0;
applyAppScaleAndMagnificationSpecIfNeeded(infos, spec);
// system process and obtained from a pool when read from parcel.
if (spec != null && android.os.Process.myPid() != Binder.getCallingPid()) {
spec.recycle();
}
adjustIsVisibleToUserIfNeeded(infos, interactiveRegion);
callback.setFindAccessibilityNodeInfosResult(infos, interactionId);
} catch (RemoteException re) {
/* ignore - the other side will time out */
}
// the system process and instantiated when read from parcel.
if (interactiveRegion != null && android.os.Process.myPid() == Binder.getCallingPid()) {
interactiveRegion.recycle();
}
}
}
use of android.view.accessibility.AccessibilityNodeProvider in project android_frameworks_base by ResurrectionRemix.
the class AccessibilityInteractionController method performAccessibilityActionUiThread.
private void performAccessibilityActionUiThread(Message message) {
final int flags = message.arg1;
final int accessibilityViewId = message.arg2;
SomeArgs args = (SomeArgs) message.obj;
final int virtualDescendantId = args.argi1;
final int action = args.argi2;
final int interactionId = args.argi3;
final IAccessibilityInteractionConnectionCallback callback = (IAccessibilityInteractionConnectionCallback) args.arg1;
Bundle arguments = (Bundle) args.arg2;
args.recycle();
boolean succeeded = false;
try {
if (mViewRootImpl.mView == null || mViewRootImpl.mAttachInfo == null || mViewRootImpl.mStopped || mViewRootImpl.mPausedForTransition) {
return;
}
mViewRootImpl.mAttachInfo.mAccessibilityFetchFlags = flags;
View target = null;
if (accessibilityViewId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
target = findViewByAccessibilityId(accessibilityViewId);
} else {
target = mViewRootImpl.mView;
}
if (target != null && isShown(target)) {
AccessibilityNodeProvider provider = target.getAccessibilityNodeProvider();
if (provider != null) {
if (virtualDescendantId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
succeeded = provider.performAction(virtualDescendantId, action, arguments);
} else {
succeeded = provider.performAction(AccessibilityNodeProvider.HOST_VIEW_ID, action, arguments);
}
} else if (virtualDescendantId == AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
succeeded = target.performAccessibilityAction(action, arguments);
}
}
} finally {
try {
mViewRootImpl.mAttachInfo.mAccessibilityFetchFlags = 0;
callback.setPerformAccessibilityActionResult(succeeded, interactionId);
} catch (RemoteException re) {
/* ignore - the other side will time out */
}
}
}
use of android.view.accessibility.AccessibilityNodeProvider in project android_frameworks_base by ResurrectionRemix.
the class ListView method layoutChildren.
@Override
protected void layoutChildren() {
final boolean blockLayoutRequests = mBlockLayoutRequests;
if (blockLayoutRequests) {
return;
}
mBlockLayoutRequests = true;
try {
super.layoutChildren();
invalidate();
if (mAdapter == null) {
resetList();
invokeOnItemScrollListener();
return;
}
final int childrenTop = mListPadding.top;
final int childrenBottom = mBottom - mTop - mListPadding.bottom;
final int childCount = getChildCount();
int index = 0;
int delta = 0;
View sel;
View oldSel = null;
View oldFirst = null;
View newSel = null;
// Remember stuff we will need down below
switch(mLayoutMode) {
case LAYOUT_SET_SELECTION:
index = mNextSelectedPosition - mFirstPosition;
if (index >= 0 && index < childCount) {
newSel = getChildAt(index);
}
break;
case LAYOUT_FORCE_TOP:
case LAYOUT_FORCE_BOTTOM:
case LAYOUT_SPECIFIC:
case LAYOUT_SYNC:
break;
case LAYOUT_MOVE_SELECTION:
default:
// Remember the previously selected view
index = mSelectedPosition - mFirstPosition;
if (index >= 0 && index < childCount) {
oldSel = getChildAt(index);
}
// Remember the previous first child
oldFirst = getChildAt(0);
if (mNextSelectedPosition >= 0) {
delta = mNextSelectedPosition - mSelectedPosition;
}
// Caution: newSel might be null
newSel = getChildAt(index + delta);
}
boolean dataChanged = mDataChanged;
if (dataChanged) {
handleDataChanged();
}
// and calling it a day
if (mItemCount == 0) {
resetList();
invokeOnItemScrollListener();
return;
} else if (mItemCount != mAdapter.getCount()) {
throw new IllegalStateException("The content of the adapter has changed but " + "ListView did not receive a notification. Make sure the content of " + "your adapter is not modified from a background thread, but only from " + "the UI thread. Make sure your adapter calls notifyDataSetChanged() " + "when its content changes. [in ListView(" + getId() + ", " + getClass() + ") with Adapter(" + mAdapter.getClass() + ")]");
}
setSelectedPositionInt(mNextSelectedPosition);
AccessibilityNodeInfo accessibilityFocusLayoutRestoreNode = null;
View accessibilityFocusLayoutRestoreView = null;
int accessibilityFocusPosition = INVALID_POSITION;
// Remember which child, if any, had accessibility focus. This must
// occur before recycling any views, since that will clear
// accessibility focus.
final ViewRootImpl viewRootImpl = getViewRootImpl();
if (viewRootImpl != null) {
final View focusHost = viewRootImpl.getAccessibilityFocusedHost();
if (focusHost != null) {
final View focusChild = getAccessibilityFocusedChild(focusHost);
if (focusChild != null) {
if (!dataChanged || isDirectChildHeaderOrFooter(focusChild) || focusChild.hasTransientState() || mAdapterHasStableIds) {
// The views won't be changing, so try to maintain
// focus on the current host and virtual view.
accessibilityFocusLayoutRestoreView = focusHost;
accessibilityFocusLayoutRestoreNode = viewRootImpl.getAccessibilityFocusedVirtualView();
}
// If all else fails, maintain focus at the same
// position.
accessibilityFocusPosition = getPositionForView(focusChild);
}
}
}
View focusLayoutRestoreDirectChild = null;
View focusLayoutRestoreView = null;
// Take focus back to us temporarily to avoid the eventual call to
// clear focus when removing the focused child below from messing
// things up when ViewAncestor assigns focus back to someone else.
final View focusedChild = getFocusedChild();
if (focusedChild != null) {
// header or footer.
if (!dataChanged || isDirectChildHeaderOrFooter(focusedChild) || focusedChild.hasTransientState() || mAdapterHasStableIds) {
focusLayoutRestoreDirectChild = focusedChild;
// Remember the specific view that had focus.
focusLayoutRestoreView = findFocus();
if (focusLayoutRestoreView != null) {
// Tell it we are going to mess with it.
focusLayoutRestoreView.dispatchStartTemporaryDetach();
}
}
requestFocus();
}
// Pull all children into the RecycleBin.
// These views will be reused if possible
final int firstPosition = mFirstPosition;
final RecycleBin recycleBin = mRecycler;
if (dataChanged) {
for (int i = 0; i < childCount; i++) {
recycleBin.addScrapView(getChildAt(i), firstPosition + i);
}
} else {
recycleBin.fillActiveViews(childCount, firstPosition);
}
// Clear out old views
detachAllViewsFromParent();
recycleBin.removeSkippedScrap();
switch(mLayoutMode) {
case LAYOUT_SET_SELECTION:
if (newSel != null) {
sel = fillFromSelection(newSel.getTop(), childrenTop, childrenBottom);
} else {
sel = fillFromMiddle(childrenTop, childrenBottom);
}
break;
case LAYOUT_SYNC:
sel = fillSpecific(mSyncPosition, mSpecificTop);
break;
case LAYOUT_FORCE_BOTTOM:
sel = fillUp(mItemCount - 1, childrenBottom);
adjustViewsUpOrDown();
break;
case LAYOUT_FORCE_TOP:
mFirstPosition = 0;
sel = fillFromTop(childrenTop);
adjustViewsUpOrDown();
break;
case LAYOUT_SPECIFIC:
final int selectedPosition = reconcileSelectedPosition();
sel = fillSpecific(selectedPosition, mSpecificTop);
/**
* When ListView is resized, FocusSelector requests an async selection for the
* previously focused item to make sure it is still visible. If the item is not
* selectable, it won't regain focus so instead we call FocusSelector
* to directly request focus on the view after it is visible.
*/
if (sel == null && mFocusSelector != null) {
final Runnable focusRunnable = mFocusSelector.setupFocusIfValid(selectedPosition);
if (focusRunnable != null) {
post(focusRunnable);
}
}
break;
case LAYOUT_MOVE_SELECTION:
sel = moveSelection(oldSel, newSel, delta, childrenTop, childrenBottom);
break;
default:
if (childCount == 0) {
if (!mStackFromBottom) {
final int position = lookForSelectablePosition(0, true);
setSelectedPositionInt(position);
sel = fillFromTop(childrenTop);
} else {
final int position = lookForSelectablePosition(mItemCount - 1, false);
setSelectedPositionInt(position);
sel = fillUp(mItemCount - 1, childrenBottom);
}
} else {
if (mSelectedPosition >= 0 && mSelectedPosition < mItemCount) {
sel = fillSpecific(mSelectedPosition, oldSel == null ? childrenTop : oldSel.getTop());
} else if (mFirstPosition < mItemCount) {
sel = fillSpecific(mFirstPosition, oldFirst == null ? childrenTop : oldFirst.getTop());
} else {
sel = fillSpecific(0, childrenTop);
}
}
break;
}
// Flush any cached views that did not get reused above
recycleBin.scrapActiveViews();
// remove any header/footer that has been temp detached and not re-attached
removeUnusedFixedViews(mHeaderViewInfos);
removeUnusedFixedViews(mFooterViewInfos);
if (sel != null) {
// focusable.
if (mItemsCanFocus && hasFocus() && !sel.hasFocus()) {
final boolean focusWasTaken = (sel == focusLayoutRestoreDirectChild && focusLayoutRestoreView != null && focusLayoutRestoreView.requestFocus()) || sel.requestFocus();
if (!focusWasTaken) {
// Selected item didn't take focus, but we still want to
// make sure something else outside of the selected view
// has focus.
final View focused = getFocusedChild();
if (focused != null) {
focused.clearFocus();
}
positionSelector(INVALID_POSITION, sel);
} else {
sel.setSelected(false);
mSelectorRect.setEmpty();
}
} else {
positionSelector(INVALID_POSITION, sel);
}
mSelectedTop = sel.getTop();
} else {
final boolean inTouchMode = mTouchMode == TOUCH_MODE_TAP || mTouchMode == TOUCH_MODE_DONE_WAITING;
if (inTouchMode) {
// If the user's finger is down, select the motion position.
final View child = getChildAt(mMotionPosition - mFirstPosition);
if (child != null) {
positionSelector(mMotionPosition, child);
}
} else if (mSelectorPosition != INVALID_POSITION) {
// If we had previously positioned the selector somewhere,
// put it back there. It might not match up with the data,
// but it's transitioning out so it's not a big deal.
final View child = getChildAt(mSelectorPosition - mFirstPosition);
if (child != null) {
positionSelector(mSelectorPosition, child);
}
} else {
// Otherwise, clear selection.
mSelectedTop = 0;
mSelectorRect.setEmpty();
}
// restore focus (i.e. something focusable in touch mode).
if (hasFocus() && focusLayoutRestoreView != null) {
focusLayoutRestoreView.requestFocus();
}
}
// Attempt to restore accessibility focus, if necessary.
if (viewRootImpl != null) {
final View newAccessibilityFocusedView = viewRootImpl.getAccessibilityFocusedHost();
if (newAccessibilityFocusedView == null) {
if (accessibilityFocusLayoutRestoreView != null && accessibilityFocusLayoutRestoreView.isAttachedToWindow()) {
final AccessibilityNodeProvider provider = accessibilityFocusLayoutRestoreView.getAccessibilityNodeProvider();
if (accessibilityFocusLayoutRestoreNode != null && provider != null) {
final int virtualViewId = AccessibilityNodeInfo.getVirtualDescendantId(accessibilityFocusLayoutRestoreNode.getSourceNodeId());
provider.performAction(virtualViewId, AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS, null);
} else {
accessibilityFocusLayoutRestoreView.requestAccessibilityFocus();
}
} else if (accessibilityFocusPosition != INVALID_POSITION) {
// Bound the position within the visible children.
final int position = MathUtils.constrain(accessibilityFocusPosition - mFirstPosition, 0, getChildCount() - 1);
final View restoreView = getChildAt(position);
if (restoreView != null) {
restoreView.requestAccessibilityFocus();
}
}
}
}
// our view hierarchy.
if (focusLayoutRestoreView != null && focusLayoutRestoreView.getWindowToken() != null) {
focusLayoutRestoreView.dispatchFinishTemporaryDetach();
}
mLayoutMode = LAYOUT_NORMAL;
mDataChanged = false;
if (mPositionScrollAfterLayout != null) {
post(mPositionScrollAfterLayout);
mPositionScrollAfterLayout = null;
}
mNeedSync = false;
setNextSelectedPositionInt(mSelectedPosition);
updateScrollIndicators();
if (mItemCount > 0) {
checkSelectionChanged();
}
invokeOnItemScrollListener();
} finally {
if (mFocusSelector != null) {
mFocusSelector.onLayoutComplete();
}
if (!blockLayoutRequests) {
mBlockLayoutRequests = false;
}
}
}
use of android.view.accessibility.AccessibilityNodeProvider in project android_frameworks_base by ResurrectionRemix.
the class ViewRootImpl method getAccessibilityFocusedRect.
private boolean getAccessibilityFocusedRect(Rect bounds) {
final AccessibilityManager manager = AccessibilityManager.getInstance(mView.mContext);
if (!manager.isEnabled() || !manager.isTouchExplorationEnabled()) {
return false;
}
final View host = mAccessibilityFocusedHost;
if (host == null || host.mAttachInfo == null) {
return false;
}
final AccessibilityNodeProvider provider = host.getAccessibilityNodeProvider();
if (provider == null) {
host.getBoundsOnScreen(bounds, true);
} else if (mAccessibilityFocusedVirtualView != null) {
mAccessibilityFocusedVirtualView.getBoundsInScreen(bounds);
} else {
return false;
}
// Transform the rect into window-relative coordinates.
final AttachInfo attachInfo = mAttachInfo;
bounds.offset(0, attachInfo.mViewRootImpl.mScrollY);
bounds.offset(-attachInfo.mWindowLeft, -attachInfo.mWindowTop);
if (!bounds.intersect(0, 0, attachInfo.mViewRootImpl.mWidth, attachInfo.mViewRootImpl.mHeight)) {
// If no intersection, set bounds to empty.
bounds.setEmpty();
}
return !bounds.isEmpty();
}
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