Ability to start a cursor drag from anywhere in an editable TextView (9a1369b4) · Commits · e / os / android_frameworks_base

core/java/android/widget/Editor.java

+109 −23

Original line number	Diff line number	Diff line
		@@ -148,8 +148,11 @@ import java.util.Map;
		public class Editor {
		private static final String TAG = "Editor";
		private static final boolean DEBUG_UNDO = false;
		// Specifies whether to use or not the magnifier when pressing the insertion or selection
		// handles.

		// Specifies whether to allow starting a cursor drag by dragging anywhere over the text.
		@VisibleForTesting
		public static boolean FLAG_ENABLE_CURSOR_DRAG = false;
		// Specifies whether to use the magnifier when pressing the insertion or selection handles.
		private static final boolean FLAG_USE_MAGNIFIER = true;

		private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
		@@ -204,7 +207,7 @@ public class Editor {
		private final MetricsLogger mMetricsLogger = new MetricsLogger();

		// Cursor Controllers.
		private InsertionPointCursorController mInsertionPointCursorController;
		InsertionPointCursorController mInsertionPointCursorController;
		SelectionModifierCursorController mSelectionModifierCursorController;
		// Action mode used when text is selected or when actions on an insertion cursor are triggered.
		private ActionMode mTextActionMode;
		@@ -1471,6 +1474,9 @@ public class Editor {
		mTouchState.update(event, viewConfiguration);
		updateFloatingToolbarVisibility(event);

		if (hasInsertionController()) {
		getInsertionController().onTouchEvent(event);
		}
		if (hasSelectionController()) {
		getSelectionController().onTouchEvent(event);
		}
		@@ -5179,15 +5185,11 @@ public class Editor {

		case MotionEvent.ACTION_UP:
		if (!offsetHasBeenChanged()) {
		final float deltaX = mLastDownRawX - ev.getRawX();
		final float deltaY = mLastDownRawY - ev.getRawY();
		final float distanceSquared = deltaX * deltaX + deltaY * deltaY;

		final ViewConfiguration viewConfiguration = ViewConfiguration.get(
		mTextView.getContext());
		final int touchSlop = viewConfiguration.getScaledTouchSlop();

		if (distanceSquared < touchSlop * touchSlop) {
		ViewConfiguration config = ViewConfiguration.get(mTextView.getContext());
		boolean isWithinTouchSlop = EditorTouchState.isDistanceWithin(
		mLastDownRawX, mLastDownRawY, ev.getRawX(), ev.getRawY(),
		config.getScaledTouchSlop());
		if (isWithinTouchSlop) {
		// Tapping on the handle toggles the insertion action mode.
		if (mTextActionMode != null) {
		stopTextActionMode();
		@@ -5237,6 +5239,10 @@ public class Editor {
		} else {
		offset = -1;
		}
		if (TextView.DEBUG_CURSOR) {
		logCursor("InsertionHandleView: updatePosition", "x=%f, y=%f, offset=%d, line=%d",
		x, y, offset, mPreviousLineTouched);
		}
		positionAtCursorOffset(offset, false, fromTouchScreen);
		if (mTextActionMode != null) {
		invalidateActionMode();
		@@ -5716,8 +5722,82 @@ public class Editor {
		}
		}

		private class InsertionPointCursorController implements CursorController {
		class InsertionPointCursorController implements CursorController {
		private InsertionHandleView mHandle;
		private boolean mIsDraggingCursor;

		public void onTouchEvent(MotionEvent event) {
		switch (event.getActionMasked()) {
		case MotionEvent.ACTION_DOWN:
		mIsDraggingCursor = false;
		break;
		case MotionEvent.ACTION_MOVE:
		if (mIsDraggingCursor) {
		performCursorDrag(event);
		} else if (FLAG_ENABLE_CURSOR_DRAG
		&& mTextView.getLayout() != null
		&& mTextView.isFocused()
		&& mTouchState.isMovedEnoughForDrag()) {
		startCursorDrag(event);
		}
		break;
		case MotionEvent.ACTION_UP:
		case MotionEvent.ACTION_CANCEL:
		if (mIsDraggingCursor) {
		endCursorDrag(event);
		}
		break;
		}
		}

		private void positionCursorDuringDrag(MotionEvent event) {
		int line = mTextView.getLineAtCoordinate(event.getY());
		int offset = mTextView.getOffsetAtCoordinate(line, event.getX());
		int oldSelectionStart = mTextView.getSelectionStart();
		int oldSelectionEnd = mTextView.getSelectionEnd();
		if (offset == oldSelectionStart && offset == oldSelectionEnd) {
		return;
		}
		Selection.setSelection((Spannable) mTextView.getText(), offset);
		updateCursorPosition();
		if (mHapticTextHandleEnabled) {
		mTextView.performHapticFeedback(HapticFeedbackConstants.TEXT_HANDLE_MOVE);
		}
		}

		private void startCursorDrag(MotionEvent event) {
		if (TextView.DEBUG_CURSOR) {
		logCursor("InsertionPointCursorController", "start cursor drag");
		}
		mIsDraggingCursor = true;
		// We don't want the parent scroll/long-press handlers to take over while dragging.
		mTextView.getParent().requestDisallowInterceptTouchEvent(true);
		mTextView.cancelLongPress();
		// Update the cursor position.
		positionCursorDuringDrag(event);
		// Show the cursor handle and magnifier.
		show();
		getHandle().removeHiderCallback();
		getHandle().updateMagnifier(event);
		// TODO(b/146555651): Figure out if suspendBlink() should be called here.
		}

		private void performCursorDrag(MotionEvent event) {
		positionCursorDuringDrag(event);
		getHandle().updateMagnifier(event);
		}

		private void endCursorDrag(MotionEvent event) {
		if (TextView.DEBUG_CURSOR) {
		logCursor("InsertionPointCursorController", "end cursor drag");
		}
		mIsDraggingCursor = false;
		// Hide the magnifier and set the handle to be hidden after a delay.
		getHandle().dismissMagnifier();
		getHandle().hideAfterDelay();
		// We're no longer dragging, so let the parent receive events.
		mTextView.getParent().requestDisallowInterceptTouchEvent(false);
		}

		public void show() {
		getHandle().show();
		@@ -5725,15 +5805,19 @@ public class Editor {
		final long durationSinceCutOrCopy =
		SystemClock.uptimeMillis() - TextView.sLastCutCopyOrTextChangedTime;

		// Cancel the single tap delayed runnable.
		if (mInsertionActionModeRunnable != null
		&& (mTouchState.isMultiTap() \|\| isCursorInsideEasyCorrectionSpan())) {
		if (mInsertionActionModeRunnable != null) {
		if (mIsDraggingCursor
		\|\| mTouchState.isMultiTap()
		\|\| isCursorInsideEasyCorrectionSpan()) {
		// Cancel the runnable for showing the floating toolbar.
		mTextView.removeCallbacks(mInsertionActionModeRunnable);
		}
		}

		// Prepare and schedule the single tap runnable to run exactly after the double tap
		// timeout has passed.
		if (!mTouchState.isMultiTap()
		// If the user recently performed a Cut or Copy action, we want to show the floating
		// toolbar even for a single tap.
		if (!mIsDraggingCursor
		&& !mTouchState.isMultiTap()
		&& !isCursorInsideEasyCorrectionSpan()
		&& (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION_MS)) {
		if (mTextActionMode == null) {
		@@ -5751,7 +5835,9 @@ public class Editor {
		}
		}

		if (!mIsDraggingCursor) {
		getHandle().hideAfterDelay();
		}

		if (mSelectionModifierCursorController != null) {
		mSelectionModifierCursorController.hide();
		@@ -5797,7 +5883,7 @@ public class Editor {

		@Override
		public boolean isCursorBeingModified() {
		return mHandle != null && mHandle.isDragging();
		return mIsDraggingCursor \|\| (mHandle != null && mHandle.isDragging());
		}

		@Override
		@@ -5959,7 +6045,6 @@ public class Editor {
		case MotionEvent.ACTION_MOVE:
		final ViewConfiguration viewConfig = ViewConfiguration.get(
		mTextView.getContext());
		final int touchSlop = viewConfig.getScaledTouchSlop();

		if (mGestureStayedInTapRegion \|\| mHaventMovedEnoughToStartDrag) {
		final float deltaX = eventX - mTouchState.getLastDownX();
		@@ -5973,6 +6058,7 @@ public class Editor {
		}
		if (mHaventMovedEnoughToStartDrag) {
		// We don't start dragging until the user has moved enough.
		int touchSlop = viewConfig.getScaledTouchSlop();
		mHaventMovedEnoughToStartDrag =
		distanceSquared <= touchSlop * touchSlop;
		}

core/java/android/widget/EditorTouchState.java

+27 −6

Original line number	Diff line number	Diff line
		@@ -55,6 +55,8 @@ public class EditorTouchState {
		private int mMultiTapStatus = MultiTapStatus.NONE;
		private boolean mMultiTapInSameArea;

		private boolean mMovedEnoughForDrag;

		public float getLastDownX() {
		return mLastDownX;
		}
		@@ -88,10 +90,14 @@ public class EditorTouchState {
		return isMultiTap() && mMultiTapInSameArea;
		}

		public boolean isMovedEnoughForDrag() {
		return mMovedEnoughForDrag;
		}

		/**
		* Updates the state based on the new event.
		*/
		public void update(MotionEvent event, ViewConfiguration viewConfiguration) {
		public void update(MotionEvent event, ViewConfiguration config) {
		final int action = event.getActionMasked();
		if (action == MotionEvent.ACTION_DOWN) {
		final boolean isMouse = event.isFromSource(InputDevice.SOURCE_MOUSE);
		@@ -105,11 +111,8 @@ public class EditorTouchState {
		} else {
		mMultiTapStatus = MultiTapStatus.TRIPLE_CLICK;
		}
		final float deltaX = event.getX() - mLastDownX;
		final float deltaY = event.getY() - mLastDownY;
		final int distanceSquared = (int) ((deltaX * deltaX) + (deltaY * deltaY));
		int doubleTapSlop = viewConfiguration.getScaledDoubleTapSlop();
		mMultiTapInSameArea = distanceSquared < doubleTapSlop * doubleTapSlop;
		mMultiTapInSameArea = isDistanceWithin(mLastDownX, mLastDownY,
		event.getX(), event.getY(), config.getScaledDoubleTapSlop());
		if (TextView.DEBUG_CURSOR) {
		String status = isDoubleTap() ? "double" : "triple";
		String inSameArea = mMultiTapInSameArea ? "in same area" : "not in same area";
		@@ -125,6 +128,7 @@ public class EditorTouchState {
		}
		mLastDownX = event.getX();
		mLastDownY = event.getY();
		mMovedEnoughForDrag = false;
		} else if (action == MotionEvent.ACTION_UP) {
		if (TextView.DEBUG_CURSOR) {
		logCursor("EditorTouchState", "ACTION_UP");
		@@ -132,6 +136,23 @@ public class EditorTouchState {
		mLastUpX = event.getX();
		mLastUpY = event.getY();
		mLastUpMillis = event.getEventTime();
		mMovedEnoughForDrag = false;
		} else if (action == MotionEvent.ACTION_MOVE) {
		mMovedEnoughForDrag = !isDistanceWithin(mLastDownX, mLastDownY,
		event.getX(), event.getY(), config.getScaledTouchSlop());
		}
		}

		/**
		* Returns true if the distance between the given coordinates is <= to the specified max.
		* This is useful to be able to determine e.g. when the user's touch has moved enough in
		* order to be considered a drag (no longer within touch slop).
		*/
		public static boolean isDistanceWithin(float x1, float y1, float x2, float y2,
		int maxDistance) {
		float deltaX = x2 - x1;
		float deltaY = y2 - y1;
		float distanceSquared = (deltaX * deltaX) + (deltaY * deltaY);
		return distanceSquared <= maxDistance * maxDistance;
		}
		}

core/java/android/widget/TextView.java

+4 −0

Original line number	Diff line number	Diff line
		@@ -10870,6 +10870,10 @@ public class TextView extends View implements ViewTreeObserver.OnPreDrawListener
		if (mEditor != null) {
		mEditor.onTouchEvent(event);

		if (mEditor.mInsertionPointCursorController != null
		&& mEditor.mInsertionPointCursorController.isCursorBeingModified()) {
		return true;
		}
		if (mEditor.mSelectionModifierCursorController != null
		&& mEditor.mSelectionModifierCursorController.isDragAcceleratorActive()) {
		return true;

core/tests/coretests/src/android/widget/EditorCursorDragTest.java

0 → 100644

+176 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2019 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.widget;

		import static android.widget.espresso.TextViewActions.dragOnText;
		import static android.widget.espresso.TextViewAssertions.hasInsertionPointerAtIndex;

		import static androidx.test.espresso.Espresso.onView;
		import static androidx.test.espresso.action.ViewActions.replaceText;
		import static androidx.test.espresso.matcher.ViewMatchers.withId;

		import android.app.Activity;
		import android.app.Instrumentation;

		import androidx.test.InstrumentationRegistry;
		import androidx.test.filters.SmallTest;
		import androidx.test.rule.ActivityTestRule;
		import androidx.test.runner.AndroidJUnit4;

		import com.android.frameworks.coretests.R;

		import com.google.common.base.Strings;

		import org.junit.After;
		import org.junit.Before;
		import org.junit.Rule;
		import org.junit.Test;
		import org.junit.runner.RunWith;

		@RunWith(AndroidJUnit4.class)
		@SmallTest
		public class EditorCursorDragTest {
		@Rule
		public ActivityTestRule<TextViewActivity> mActivityRule = new ActivityTestRule<>(
		TextViewActivity.class);

		private boolean mOriginalFlagValue;
		private Instrumentation mInstrumentation;
		private Activity mActivity;

		@Before
		public void before() throws Throwable {
		mInstrumentation = InstrumentationRegistry.getInstrumentation();
		mActivity = mActivityRule.getActivity();
		mOriginalFlagValue = Editor.FLAG_ENABLE_CURSOR_DRAG;
		Editor.FLAG_ENABLE_CURSOR_DRAG = true;
		}
		@After
		public void after() throws Throwable {
		Editor.FLAG_ENABLE_CURSOR_DRAG = mOriginalFlagValue;
		}

		@Test
		public void testCursorDrag_horizontal_whenTextViewContentsFitOnScreen() throws Throwable {
		String text = "Hello world!";
		onView(withId(R.id.textview)).perform(replaceText(text));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(0));

		// Drag left to right. The cursor should end up at the position where the finger is lifted.
		onView(withId(R.id.textview)).perform(dragOnText(text.indexOf("llo"), text.indexOf("!")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(11));

		// Drag right to left. The cursor should end up at the position where the finger is lifted.
		onView(withId(R.id.textview)).perform(dragOnText(text.indexOf("!"), text.indexOf("llo")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(2));
		}

		@Test
		public void testCursorDrag_horizontal_whenTextViewContentsLargerThanScreen() throws Throwable {
		String text = "Hello world!"
		+ Strings.repeat("\n", 500) + "012345middle"
		+ Strings.repeat("\n", 10) + "012345last";
		onView(withId(R.id.textview)).perform(replaceText(text));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(0));

		// Drag left to right. The cursor should end up at the position where the finger is lifted.
		onView(withId(R.id.textview)).perform(dragOnText(text.indexOf("llo"), text.indexOf("!")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(11));

		// Drag right to left. The cursor should end up at the position where the finger is lifted.
		onView(withId(R.id.textview)).perform(dragOnText(text.indexOf("!"), text.indexOf("llo")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(2));
		}

		@Test
		public void testCursorDrag_diagonal_whenTextViewContentsLargerThanScreen() throws Throwable {
		StringBuilder sb = new StringBuilder();
		for (int i = 1; i <= 9; i++) {
		sb.append("line").append(i).append("\n");
		}
		sb.append(Strings.repeat("0123456789\n\n", 500)).append("Last line");
		String text = sb.toString();
		onView(withId(R.id.textview)).perform(replaceText(text));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(0));

		// Drag along a diagonal path.
		onView(withId(R.id.textview)).perform(dragOnText(text.indexOf("line1"), text.indexOf("2")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(text.indexOf("2")));

		// Drag along a steeper diagonal path.
		onView(withId(R.id.textview)).perform(dragOnText(text.indexOf("line1"), text.indexOf("9")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(text.indexOf("9")));

		// Drag along an almost vertical path.
		// TODO(b/145833335): Consider whether this should scroll instead of dragging the cursor.
		onView(withId(R.id.textview)).perform(dragOnText(text.indexOf("ne1"), text.indexOf("9")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(text.indexOf("9")));

		// Drag along a vertical path from line 1 to line 9.
		// TODO(b/145833335): Consider whether this should scroll instead of dragging the cursor.
		onView(withId(R.id.textview)).perform(dragOnText(text.indexOf("e1"), text.indexOf("e9")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(text.indexOf("e9")));

		// Drag along a vertical path from line 9 to line 1.
		// TODO(b/145833335): Consider whether this should scroll instead of dragging the cursor.
		onView(withId(R.id.textview)).perform(dragOnText(text.indexOf("e9"), text.indexOf("e1")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(text.indexOf("e1")));
		}

		@Test
		public void testCursorDrag_vertical_whenTextViewContentsFitOnScreen() throws Throwable {
		String text = "012first\n\n" + Strings.repeat("012345\n\n", 10) + "012last";
		onView(withId(R.id.textview)).perform(replaceText(text));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(0));

		// Drag down. Since neither the TextView nor its container require scrolling, the cursor
		// drag should execute and the cursor should end up at the position where the finger is
		// lifted.
		onView(withId(R.id.textview)).perform(
		dragOnText(text.indexOf("first"), text.indexOf("last")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(text.length() - 4));

		// Drag up. Since neither the TextView nor its container require scrolling, the cursor
		// drag should execute and the cursor should end up at the position where the finger is
		// lifted.
		onView(withId(R.id.textview)).perform(
		dragOnText(text.indexOf("last"), text.indexOf("first")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(3));
		}

		@Test
		public void testCursorDrag_vertical_whenTextViewContentsLargerThanScreen() throws Throwable {
		String text = "012345first\n\n"
		+ Strings.repeat("0123456789\n\n", 10) + "012345middle"
		+ Strings.repeat("0123456789\n\n", 500) + "012345last";
		onView(withId(R.id.textview)).perform(replaceText(text));
		int initialCursorPosition = 0;
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(initialCursorPosition));

		// Drag up.
		// TODO(b/145833335): Consider whether this should scroll instead of dragging the cursor.
		onView(withId(R.id.textview)).perform(
		dragOnText(text.indexOf("middle"), text.indexOf("first")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(text.indexOf("first")));

		// Drag down.
		// TODO(b/145833335): Consider whether this should scroll instead of dragging the cursor.
		onView(withId(R.id.textview)).perform(
		dragOnText(text.indexOf("first"), text.indexOf("middle")));
		onView(withId(R.id.textview)).check(hasInsertionPointerAtIndex(text.indexOf("middle")));
		}
		}

core/tests/coretests/src/android/widget/EditorTouchStateTest.java

+69 −23

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