Add CharSequence interfaces for BidiFormatter (2f35c640) · Commits · e / os / android_frameworks_base

core/java/android/text/BidiFormatter.java

+47 −11

Original line number	Diff line number	Diff line
		@@ -293,7 +293,7 @@ public final class BidiFormatter {
		* directionality is determined by scanning the end of the string, the overall directionality is
		* given explicitly by a heuristic to estimate the {@code str}'s directionality.
		*
		* @param str String after which the mark may need to appear.
		* @param str CharSequence after which the mark may need to appear.
		* @param heuristic The text direction heuristic that will be used to estimate the {@code str}'s
		* directionality.
		* @return LRM for RTL text in LTR context; RLM for LTR text in RTL context;
		@@ -301,7 +301,7 @@ public final class BidiFormatter {
		*
		* @hide
		*/
		public String markAfter(String str, TextDirectionHeuristic heuristic) {
		public String markAfter(CharSequence str, TextDirectionHeuristic heuristic) {
		final boolean isRtl = heuristic.isRtl(str, 0, str.length());
		// getExitDir() is called only if needed (short-circuit).
		if (!mIsRtlContext && (isRtl \|\| getExitDir(str) == DIR_RTL)) {
		@@ -322,7 +322,7 @@ public final class BidiFormatter {
		* entry directionality is determined by scanning the beginning of the string, the overall
		* directionality is given explicitly by a heuristic to estimate the {@code str}'s directionality.
		*
		* @param str String before which the mark may need to appear.
		* @param str CharSequence before which the mark may need to appear.
		* @param heuristic The text direction heuristic that will be used to estimate the {@code str}'s
		* directionality.
		* @return LRM for RTL text in LTR context; RLM for LTR text in RTL context;
		@@ -330,7 +330,7 @@ public final class BidiFormatter {
		*
		* @hide
		*/
		public String markBefore(String str, TextDirectionHeuristic heuristic) {
		public String markBefore(CharSequence str, TextDirectionHeuristic heuristic) {
		final boolean isRtl = heuristic.isRtl(str, 0, str.length());
		// getEntryDir() is called only if needed (short-circuit).
		if (!mIsRtlContext && (isRtl \|\| getEntryDir(str) == DIR_RTL)) {
		@@ -350,6 +350,13 @@ public final class BidiFormatter {
		* false.
		*/
		public boolean isRtl(String str) {
		return isRtl((CharSequence) str);
		}

		/**
		* @hide
		*/
		public boolean isRtl(CharSequence str) {
		return mDefaultTextDirectionHeuristic.isRtl(str, 0, str.length());
		}

		@@ -384,9 +391,16 @@ public final class BidiFormatter {
		* {@code null}.
		*/
		public String unicodeWrap(String str, TextDirectionHeuristic heuristic, boolean isolate) {
		return unicodeWrap((CharSequence) str, heuristic, isolate).toString();
		}

		/**
		* @hide
		*/
		public CharSequence unicodeWrap(CharSequence str, TextDirectionHeuristic heuristic, boolean isolate) {
		if (str == null) return null;
		final boolean isRtl = heuristic.isRtl(str, 0, str.length());
		StringBuilder result = new StringBuilder();
		SpannableStringBuilder result = new SpannableStringBuilder();
		if (getStereoReset() && isolate) {
		result.append(markBefore(str,
		isRtl ? TextDirectionHeuristics.RTL : TextDirectionHeuristics.LTR));
		@@ -402,7 +416,7 @@ public final class BidiFormatter {
		result.append(markAfter(str,
		isRtl ? TextDirectionHeuristics.RTL : TextDirectionHeuristics.LTR));
		}
		return result.toString();
		return result;
		}

		/**
		@@ -418,6 +432,14 @@ public final class BidiFormatter {
		return unicodeWrap(str, heuristic, true /* isolate */);
		}

		/**
		* @hide
		*/
		public CharSequence unicodeWrap(CharSequence str, TextDirectionHeuristic heuristic) {
		return unicodeWrap(str, heuristic, true /* isolate */);
		}


		/**
		* Operates like {@link #unicodeWrap(String, TextDirectionHeuristic, boolean)}, but uses the
		* formatter's default direction estimation algorithm.
		@@ -431,6 +453,13 @@ public final class BidiFormatter {
		return unicodeWrap(str, mDefaultTextDirectionHeuristic, isolate);
		}

		/**
		* @hide
		*/
		public CharSequence unicodeWrap(CharSequence str, boolean isolate) {
		return unicodeWrap(str, mDefaultTextDirectionHeuristic, isolate);
		}

		/**
		* Operates like {@link #unicodeWrap(String, TextDirectionHeuristic, boolean)}, but uses the
		* formatter's default direction estimation algorithm and assumes {@code isolate} is true.
		@@ -442,6 +471,13 @@ public final class BidiFormatter {
		return unicodeWrap(str, mDefaultTextDirectionHeuristic, true /* isolate */);
		}

		/**
		* @hide
		*/
		public CharSequence unicodeWrap(CharSequence str) {
		return unicodeWrap(str, mDefaultTextDirectionHeuristic, true /* isolate */);
		}

		private static BidiFormatter getDefaultInstanceFromContext(boolean isRtlContext) {
		return isRtlContext ? DEFAULT_RTL_INSTANCE : DEFAULT_LTR_INSTANCE;
		}
		@@ -477,7 +513,7 @@ public final class BidiFormatter {
		*
		* @param str the string to check.
		*/
		private static int getExitDir(String str) {
		private static int getExitDir(CharSequence str) {
		return new DirectionalityEstimator(str, false /* isHtml */).getExitDir();
		}

		@@ -494,7 +530,7 @@ public final class BidiFormatter {
		*
		* @param str the string to check.
		*/
		private static int getEntryDir(String str) {
		private static int getEntryDir(CharSequence str) {
		return new DirectionalityEstimator(str, false /* isHtml */).getEntryDir();
		}

		@@ -532,7 +568,7 @@ public final class BidiFormatter {
		/**
		* The text to be scanned.
		*/
		private final String text;
		private final CharSequence text;

		/**
		* Whether the text to be scanned is to be treated as HTML, i.e. skipping over tags and
		@@ -565,7 +601,7 @@ public final class BidiFormatter {
		* @param isHtml Whether the text to be scanned is to be treated as HTML, i.e. skipping over
		* tags and entities.
		*/
		DirectionalityEstimator(String text, boolean isHtml) {
		DirectionalityEstimator(CharSequence text, boolean isHtml) {
		this.text = text;
		this.isHtml = isHtml;
		length = text.length();