Merge "Calculates the slop values per upper/lower line height." into rvc-dev am: 27daeb0307 (256ed59b) · Commits · e / os / android_frameworks_base

core/java/android/widget/Editor.java

+36 −21

Original line number	Diff line number	Diff line
		@@ -405,6 +405,13 @@ public class Editor {
		// The actual zoom value may changes based on this initial zoom value.
		private float mInitialZoom = 1f;

		// For calculating the line change slops while moving cursor/selection.
		// The slop max/min value include line height and the slop on the upper/lower line.
		private static final int LINE_CHANGE_SLOP_MAX_DP = 45;
		private static final int LINE_CHANGE_SLOP_MIN_DP = 12;
		private int mLineChangeSlopMax;
		private int mLineChangeSlopMin;

		Editor(TextView textView) {
		mTextView = textView;
		// Synchronize the filter list, which places the undo input filter at the end.
		@@ -430,6 +437,14 @@ public class Editor {
		logCursor("Editor", "New magnifier is %s.",
		mNewMagnifierEnabled ? "enabled" : "disabled");
		}

		mLineChangeSlopMax = (int) TypedValue.applyDimension(
		TypedValue.COMPLEX_UNIT_DIP, LINE_CHANGE_SLOP_MAX_DP,
		mTextView.getContext().getResources().getDisplayMetrics());
		mLineChangeSlopMin = (int) TypedValue.applyDimension(
		TypedValue.COMPLEX_UNIT_DIP, LINE_CHANGE_SLOP_MIN_DP,
		mTextView.getContext().getResources().getDisplayMetrics());

		}

		@VisibleForTesting
		@@ -6018,7 +6033,14 @@ public class Editor {
		}
		}

		private int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) {
		@VisibleForTesting
		public void setLineChangeSlopMinMaxForTesting(final int min, final int max) {
		mLineChangeSlopMin = min;
		mLineChangeSlopMax = max;
		}

		@VisibleForTesting
		public int getCurrentLineAdjustedForSlop(Layout layout, int prevLine, float y) {
		final int trueLine = mTextView.getLineAtCoordinate(y);
		if (layout == null \|\| prevLine > layout.getLineCount()
		\|\| layout.getLineCount() <= 0 \|\| prevLine < 0) {
		@@ -6031,28 +6053,21 @@ public class Editor {
		return trueLine;
		}

		final int lineHeight = layout.getLineBottom(prevLine) - layout.getLineTop(prevLine);
		int slop = (int)(LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS
		* (layout.getLineBottom(trueLine) - layout.getLineTop(trueLine)));
		slop = Math.max(mLineChangeSlopMin,
		Math.min(mLineChangeSlopMax, lineHeight + slop)) - lineHeight;
		slop = Math.max(0, slop);

		final float verticalOffset = mTextView.viewportToContentVerticalOffset();
		final int lineCount = layout.getLineCount();
		final float slop = mTextView.getLineHeight() * LINE_SLOP_MULTIPLIER_FOR_HANDLEVIEWS;

		final float firstLineTop = layout.getLineTop(0) + verticalOffset;
		final float prevLineTop = layout.getLineTop(prevLine) + verticalOffset;
		final float yTopBound = Math.max(prevLineTop - slop, firstLineTop + slop);

		final float lastLineBottom = layout.getLineBottom(lineCount - 1) + verticalOffset;
		final float prevLineBottom = layout.getLineBottom(prevLine) + verticalOffset;
		final float yBottomBound = Math.min(prevLineBottom + slop, lastLineBottom - slop);

		// Determine if we've moved lines based on y position and previous line.
		int currLine;
		if (y <= yTopBound) {
		currLine = Math.max(prevLine - 1, 0);
		} else if (y >= yBottomBound) {
		currLine = Math.min(prevLine + 1, lineCount - 1);
		} else {
		currLine = prevLine;
		if (trueLine > prevLine && y >= layout.getLineBottom(prevLine) + slop + verticalOffset) {
		return trueLine;
		}
		if (trueLine < prevLine && y <= layout.getLineTop(prevLine) - slop + verticalOffset) {
		return trueLine;
		}
		return currLine;
		return prevLine;
		}

		/**

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

+36 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@

		package android.widget;

		import static android.text.Spanned.SPAN_INCLUSIVE_EXCLUSIVE;
		import static android.widget.espresso.TextViewActions.clickOnTextAtIndex;
		import static android.widget.espresso.TextViewActions.dragOnText;
		import static android.widget.espresso.TextViewAssertions.hasInsertionPointerAtIndex;
		@@ -37,6 +38,9 @@ import android.app.Activity;
		import android.app.Instrumentation;
		import android.graphics.Rect;
		import android.text.Layout;
		import android.text.Spannable;
		import android.text.SpannableString;
		import android.text.style.AbsoluteSizeSpan;
		import android.util.ArraySet;
		import android.util.Log;
		import android.view.InputDevice;
		@@ -488,6 +492,38 @@ public class EditorCursorDragTest {
		simulateDrag(tv, events, true);
		}

		@Test
		public void testLineChangeSlop() throws Throwable {
		TextView tv = mActivity.findViewById(R.id.textview);
		Spannable s = new SpannableString("a\nb\nc");
		s.setSpan(new AbsoluteSizeSpan(10), 2, 4, SPAN_INCLUSIVE_EXCLUSIVE);
		s.setSpan(new AbsoluteSizeSpan(32), 4, 5, SPAN_INCLUSIVE_EXCLUSIVE);
		mInstrumentation.runOnMainSync(() -> tv.setText(s));

		Layout layout = tv.getLayout();
		Editor editor = tv.getEditorForTesting();
		final float verticalOffset = tv.getExtendedPaddingTop();
		editor.setLineChangeSlopMinMaxForTesting(30, 65);
		// Hit top part of upper line, jump to upper line.
		assertThat(editor.getCurrentLineAdjustedForSlop(layout, 1, 5 + verticalOffset))
		.isEqualTo(0);
		// Hit bottom part of upper line, stay at current line.
		assertThat(editor.getCurrentLineAdjustedForSlop(layout, 1, 40 + verticalOffset))
		.isEqualTo(1);
		// Hit current line, stay at current line.
		assertThat(editor.getCurrentLineAdjustedForSlop(layout, 1, 70 + verticalOffset))
		.isEqualTo(1);
		// Hit top part of lower line, stay at current line.
		assertThat(editor.getCurrentLineAdjustedForSlop(layout, 1, 85 + verticalOffset))
		.isEqualTo(1);
		// Hit bottom part of lower line, jump to lower line.
		assertThat(editor.getCurrentLineAdjustedForSlop(layout, 1, 110 + verticalOffset))
		.isEqualTo(2);
		// Hit lower line of lower line, jump to target line.
		assertThat(editor.getCurrentLineAdjustedForSlop(layout, 0, 110 + verticalOffset))
		.isEqualTo(2);
		}

		@Test
		public void testCursorDrag_snapDistance() throws Throwable {
		String text = "line1: This is the 1st line: A\n"