Delete CR LF at the same time with one backspace key. (4d19160e) · Commits · e / os / android_frameworks_base

core/java/android/text/method/BaseKeyListener.java

+25 −12

Original line number	Diff line number	Diff line
		@@ -48,6 +48,9 @@ public abstract class BaseKeyListener extends MetaKeyKeyListener
		implements KeyListener {
		/* package */ static final Object OLD_SEL_START = new NoCopySpan.Concrete();

		private static final int LINE_FEED = 0x0A;
		private static final int CARRIAGE_RETURN = 0x0D;

		private final Object mLock = new Object();

		@GuardedBy("mLock")
		@@ -110,34 +113,37 @@ public abstract class BaseKeyListener extends MetaKeyKeyListener
		// Initial state
		final int STATE_START = 0;

		// The offset is immediately before line feed.
		final int STATE_LF = 1;

		// The offset is immediately before a KEYCAP.
		final int STATE_BEFORE_KEYCAP = 1;
		final int STATE_BEFORE_KEYCAP = 2;
		// The offset is immediately before a variation selector and a KEYCAP.
		final int STATE_BEFORE_VS_AND_KEYCAP = 2;
		final int STATE_BEFORE_VS_AND_KEYCAP = 3;

		// The offset is immediately before an emoji modifier.
		final int STATE_BEFORE_EMOJI_MODIFIER = 3;
		final int STATE_BEFORE_EMOJI_MODIFIER = 4;
		// The offset is immediately before a variation selector and an emoji modifier.
		final int STATE_BEFORE_VS_AND_EMOJI_MODIFIER = 4;
		final int STATE_BEFORE_VS_AND_EMOJI_MODIFIER = 5;

		// The offset is immediately before a variation selector.
		final int STATE_BEFORE_VS = 5;
		final int STATE_BEFORE_VS = 6;

		// The offset is immediately before a ZWJ emoji.
		final int STATE_BEFORE_ZWJ_EMOJI = 6;
		final int STATE_BEFORE_ZWJ_EMOJI = 7;
		// The offset is immediately before a ZWJ that were seen before a ZWJ emoji.
		final int STATE_BEFORE_ZWJ = 7;
		final int STATE_BEFORE_ZWJ = 8;
		// The offset is immediately before a variation selector and a ZWJ that were seen before a
		// ZWJ emoji.
		final int STATE_BEFORE_VS_AND_ZWJ = 8;
		final int STATE_BEFORE_VS_AND_ZWJ = 9;

		// The number of following RIS code points is odd.
		final int STATE_ODD_NUMBERED_RIS = 9;
		final int STATE_ODD_NUMBERED_RIS = 10;
		// The number of following RIS code points is even.
		final int STATE_EVEN_NUMBERED_RIS = 10;
		final int STATE_EVEN_NUMBERED_RIS = 11;

		// The state machine has been stopped.
		final int STATE_FINISHED = 11;
		final int STATE_FINISHED = 12;

		int deleteCharCount = 0; // Char count to be deleted by backspace.
		int lastSeenVSCharCount = 0; // Char count of previous variation selector.
		@@ -152,7 +158,9 @@ public abstract class BaseKeyListener extends MetaKeyKeyListener
		switch (state) {
		case STATE_START:
		deleteCharCount = Character.charCount(codePoint);
		if (isVariationSelector(codePoint)) {
		if (codePoint == LINE_FEED) {
		state = STATE_LF;
		} else if (isVariationSelector(codePoint)) {
		state = STATE_BEFORE_VS;
		} else if (Emoji.isZwjEmoji(codePoint)) {
		state = STATE_BEFORE_ZWJ_EMOJI;
		@@ -166,6 +174,11 @@ public abstract class BaseKeyListener extends MetaKeyKeyListener
		state = STATE_FINISHED;
		}
		break;
		case STATE_LF:
		if (codePoint == CARRIAGE_RETURN) {
		++deleteCharCount;
		}
		state = STATE_FINISHED;
		case STATE_ODD_NUMBERED_RIS:
		if (Emoji.isRegionalIndicatorSymbol(codePoint)) {
		deleteCharCount += 2; /* Char count of RIS */