/*
* Copyright (C) 2013 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.support.v4.text;
import android.test.AndroidTestCase;
import java.util.Locale;
/** @hide */
public class BidiFormatterTest extends AndroidTestCase {
private static final BidiFormatter LTR_FMT = BidiFormatter.getInstance(false /* LTR context */);
private static final BidiFormatter RTL_FMT = BidiFormatter.getInstance(true /* RTL context */);
private static final BidiFormatter LTR_FMT_EXIT_RESET =
new BidiFormatter.Builder(false /* LTR context */).stereoReset(false).build();
private static final BidiFormatter RTL_FMT_EXIT_RESET =
new BidiFormatter.Builder(true /* RTL context */).stereoReset(false).build();
private static final String EN = "abba";
private static final String HE = "\u05e0\u05e1";
private static final String LRM = "\u200E";
private static final String RLM = "\u200F";
private static final String LRE = "\u202A";
private static final String RLE = "\u202B";
private static final String PDF = "\u202C";
public void testIsRtlContext() {
assertEquals(false, LTR_FMT.isRtlContext());
assertEquals(true, RTL_FMT.isRtlContext());
assertEquals(false, BidiFormatter.getInstance(Locale.ENGLISH).isRtlContext());
assertEquals(true, BidiFormatter.getInstance(true).isRtlContext());
}
public void testBuilderIsRtlContext() {
assertEquals(false, new BidiFormatter.Builder(false).build().isRtlContext());
assertEquals(true, new BidiFormatter.Builder(true).build().isRtlContext());
}
public void testIsRtl() {
assertEquals(true, BidiFormatter.getInstance(true).isRtl(HE));
assertEquals(true, BidiFormatter.getInstance(false).isRtl(HE));
assertEquals(false, BidiFormatter.getInstance(true).isRtl(EN));
assertEquals(false, BidiFormatter.getInstance(false).isRtl(EN));
}
public void testUnicodeWrap() {
// Uniform directionality in opposite context.
assertEquals("uniform dir opposite to LTR context",
RLE + "." + HE + "." + PDF + LRM,
LTR_FMT_EXIT_RESET.unicodeWrap("." + HE + "."));
assertEquals("uniform dir opposite to LTR context, stereo reset",
LRM + RLE + "." + HE + "." + PDF + LRM,
LTR_FMT.unicodeWrap("." + HE + "."));
assertEquals("uniform dir opposite to LTR context, stereo reset, no isolation",
RLE + "." + HE + "." + PDF,
LTR_FMT.unicodeWrap("." + HE + ".", false));
assertEquals("neutral treated as opposite to LTR context",
RLE + "." + PDF + LRM,
LTR_FMT_EXIT_RESET.unicodeWrap(".", TextDirectionHeuristicsCompat.RTL));
assertEquals("uniform dir opposite to RTL context",
LRE + "." + EN + "." + PDF + RLM,
RTL_FMT_EXIT_RESET.unicodeWrap("." + EN + "."));
assertEquals("uniform dir opposite to RTL context, stereo reset",
RLM + LRE + "." + EN + "." + PDF + RLM,
RTL_FMT.unicodeWrap("." + EN + "."));
assertEquals("uniform dir opposite to RTL context, stereo reset, no isolation",
LRE + "." + EN + "." + PDF,
RTL_FMT.unicodeWrap("." + EN + ".", false));
assertEquals("neutral treated as opposite to RTL context",
LRE + "." + PDF + RLM,
RTL_FMT_EXIT_RESET.unicodeWrap(".", TextDirectionHeuristicsCompat.LTR));
// We test mixed-directionality cases only with an explicit overall directionality parameter
// because the estimation logic is outside the sphere of BidiFormatter, and different
// estimators will treat them differently.
// Overall directionality matching context, but with opposite exit directionality.
assertEquals("exit dir opposite to LTR context",
EN + HE + LRM,
LTR_FMT_EXIT_RESET.unicodeWrap(EN + HE, TextDirectionHeuristicsCompat.LTR));
assertEquals("exit dir opposite to LTR context, stereo reset",
EN + HE + LRM,
LTR_FMT.unicodeWrap(EN + HE, TextDirectionHeuristicsCompat.LTR));
assertEquals("exit dir opposite to LTR context, stereo reset, no isolation",
EN + HE,
LTR_FMT.unicodeWrap(EN + HE, TextDirectionHeuristicsCompat.LTR, false));
assertEquals("exit dir opposite to RTL context",
HE + EN + RLM,
RTL_FMT_EXIT_RESET.unicodeWrap(HE + EN, TextDirectionHeuristicsCompat.RTL));
assertEquals("exit dir opposite to RTL context, stereo reset",
HE + EN + RLM,
RTL_FMT.unicodeWrap(HE + EN, TextDirectionHeuristicsCompat.RTL));
assertEquals("exit dir opposite to RTL context, stereo reset, no isolation",
HE + EN,
RTL_FMT.unicodeWrap(HE + EN, TextDirectionHeuristicsCompat.RTL, false));
// Overall directionality matching context, but with opposite entry directionality.
assertEquals("entry dir opposite to LTR context",
HE + EN,
LTR_FMT_EXIT_RESET.unicodeWrap(HE + EN, TextDirectionHeuristicsCompat.LTR));
assertEquals("entry dir opposite to LTR context, stereo reset",
LRM + HE + EN,
LTR_FMT.unicodeWrap(HE + EN, TextDirectionHeuristicsCompat.LTR));
assertEquals("entry dir opposite to LTR context, stereo reset, no isolation",
HE + EN,
LTR_FMT.unicodeWrap(HE + EN, TextDirectionHeuristicsCompat.LTR, false));
assertEquals("entry dir opposite to RTL context",
EN + HE,
RTL_FMT_EXIT_RESET.unicodeWrap(EN + HE, TextDirectionHeuristicsCompat.RTL));
assertEquals("entry dir opposite to RTL context, stereo reset",
RLM + EN + HE,
RTL_FMT.unicodeWrap(EN + HE, TextDirectionHeuristicsCompat.RTL));
assertEquals("entry dir opposite to RTL context, stereo reset, no isolation",
EN + HE,
RTL_FMT.unicodeWrap(EN + HE, TextDirectionHeuristicsCompat.RTL, false));
// Overall directionality matching context, but with opposite entry and exit directionality.
assertEquals("entry and exit dir opposite to LTR context",
HE + EN + HE + LRM,
LTR_FMT_EXIT_RESET.unicodeWrap(HE + EN + HE, TextDirectionHeuristicsCompat.LTR));
assertEquals("entry and exit dir opposite to LTR context, stereo reset",
LRM + HE + EN + HE + LRM,
LTR_FMT.unicodeWrap(HE + EN + HE, TextDirectionHeuristicsCompat.LTR));
assertEquals("entry and exit dir opposite to LTR context, no isolation",
HE + EN + HE,
LTR_FMT_EXIT_RESET.unicodeWrap(HE + EN + HE, TextDirectionHeuristicsCompat.LTR, false));
assertEquals("entry and exit dir opposite to RTL context",
EN + HE + EN + RLM,
RTL_FMT_EXIT_RESET.unicodeWrap(EN + HE + EN, TextDirectionHeuristicsCompat.RTL));
assertEquals("entry and exit dir opposite to RTL context, no isolation",
EN + HE + EN,
RTL_FMT_EXIT_RESET.unicodeWrap(EN + HE + EN, TextDirectionHeuristicsCompat.RTL, false));
// Entry and exit directionality matching context, but with opposite overall directionality.
assertEquals("overall dir (but not entry or exit dir) opposite to LTR context",
RLE + EN + HE + EN + PDF + LRM,
LTR_FMT_EXIT_RESET.unicodeWrap(EN + HE + EN, TextDirectionHeuristicsCompat.RTL));
assertEquals("overall dir (but not entry or exit dir) opposite to LTR context, stereo reset",
LRM + RLE + EN + HE + EN + PDF + LRM,
LTR_FMT.unicodeWrap(EN + HE + EN, TextDirectionHeuristicsCompat.RTL));
assertEquals("overall dir (but not entry or exit dir) opposite to LTR context, no isolation",
RLE + EN + HE + EN + PDF,
LTR_FMT_EXIT_RESET.unicodeWrap(EN + HE + EN, TextDirectionHeuristicsCompat.RTL, false));
assertEquals("overall dir (but not entry or exit dir) opposite to RTL context",
LRE + HE + EN + HE + PDF + RLM,
RTL_FMT_EXIT_RESET.unicodeWrap(HE + EN + HE, TextDirectionHeuristicsCompat.LTR));
assertEquals("overall dir (but not entry or exit dir) opposite to RTL context, stereo reset",
RLM + LRE + HE + EN + HE + PDF + RLM,
RTL_FMT.unicodeWrap(HE + EN + HE, TextDirectionHeuristicsCompat.LTR));
assertEquals("overall dir (but not entry or exit dir) opposite to RTL context, no isolation",
LRE + HE + EN + HE + PDF,
RTL_FMT_EXIT_RESET.unicodeWrap(HE + EN + HE, TextDirectionHeuristicsCompat.LTR, false));
}
}
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