1e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt/* 2e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Copyright (C) 2010 The Android Open Source Project 3e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 4e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Licensed under the Apache License, Version 2.0 (the "License"); 5e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * you may not use this file except in compliance with the License. 6e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * You may obtain a copy of the License at 7e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 8e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * http://www.apache.org/licenses/LICENSE-2.0 9e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 10e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Unless required by applicable law or agreed to in writing, software 11e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * distributed under the License is distributed on an "AS IS" BASIS, 12e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * See the License for the specific language governing permissions and 14e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * limitations under the License. 15e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 16e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 17e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Feltpackage android.text; 18e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 19538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournaderimport android.annotation.NonNull; 20538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournaderimport android.annotation.Nullable; 21e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Feltimport android.graphics.Canvas; 22e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Feltimport android.graphics.Paint; 23e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Feltimport android.graphics.Paint.FontMetricsInt; 24e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Feltimport android.text.Layout.Directions; 25c982f60e982c1d2df9f115ed9a5c3ef3643d0892Doug Feltimport android.text.Layout.TabStops; 26e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Feltimport android.text.style.CharacterStyle; 27e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Feltimport android.text.style.MetricAffectingSpan; 28e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Feltimport android.text.style.ReplacementSpan; 29e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Feltimport android.util.Log; 30e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 313630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournaderimport com.android.internal.annotations.VisibleForTesting; 32dd8f5ed79c7baed35b3f04e4778aff7867653255Gilles Debunneimport com.android.internal.util.ArrayUtils; 33dd8f5ed79c7baed35b3f04e4778aff7867653255Gilles Debunne 34538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournaderimport java.util.ArrayList; 35538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 36e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt/** 37e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Represents a line of styled text, for measuring in visual order and 38e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * for rendering. 39e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 40e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * <p>Get a new instance using obtain(), and when finished with it, return it 41e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * to the pool using recycle(). 42e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 43e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * <p>Call set to prepare the instance for use, then either draw, measure, 44e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * metrics, or caretToLeftRightOf. 45e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 46e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @hide 47e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 483630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader@VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) 493630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournaderpublic class TextLine { 50bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy private static final boolean DEBUG = false; 51bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy 52e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private TextPaint mPaint; 53e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private CharSequence mText; 54e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private int mStart; 55e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private int mLen; 56e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private int mDir; 57e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private Directions mDirections; 58e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private boolean mHasTabs; 59c982f60e982c1d2df9f115ed9a5c3ef3643d0892Doug Felt private TabStops mTabs; 60e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private char[] mChars; 61e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private boolean mCharsValid; 62e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private Spanned mSpanned; 63beafa1f9d2845ee9b5ca352087de03ed0afe7db7Seigo Nonaka private PrecomputedText mComputed; 6409da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka 6509da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka // Additional width of whitespace for justification. This value is per whitespace, thus 6609da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka // the line width will increase by mAddedWidth x (number of stretchable whitespaces). 6709da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka private float mAddedWidth; 68538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 69345cb03315a0813ec57e44f97fc3fa4af6b3c309Gilles Debunne private final TextPaint mWorkPaint = new TextPaint(); 70538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader private final TextPaint mActivePaint = new TextPaint(); 71c1f44830809f0a8526855f13822702ea756214faGilles Debunne private final SpanSet<MetricAffectingSpan> mMetricAffectingSpanSpanSet = 72c1f44830809f0a8526855f13822702ea756214faGilles Debunne new SpanSet<MetricAffectingSpan>(MetricAffectingSpan.class); 73c1f44830809f0a8526855f13822702ea756214faGilles Debunne private final SpanSet<CharacterStyle> mCharacterStyleSpanSet = 74c1f44830809f0a8526855f13822702ea756214faGilles Debunne new SpanSet<CharacterStyle>(CharacterStyle.class); 75c1f44830809f0a8526855f13822702ea756214faGilles Debunne private final SpanSet<ReplacementSpan> mReplacementSpanSpanSet = 76c1f44830809f0a8526855f13822702ea756214faGilles Debunne new SpanSet<ReplacementSpan>(ReplacementSpan.class); 77e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 781378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader private final DecorationInfo mDecorationInfo = new DecorationInfo(); 79a273a70ecbb0d1aaf9aeceec7aa91591290a4871Siyamed Sinir private final ArrayList<DecorationInfo> mDecorations = new ArrayList<>(); 80538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 81bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy private static final TextLine[] sCached = new TextLine[3]; 82e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 83e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 84e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Returns a new TextLine from the shared pool. 85e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 86e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return an uninitialized TextLine 87e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 883630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) 893630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader public static TextLine obtain() { 90e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt TextLine tl; 91bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy synchronized (sCached) { 92bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy for (int i = sCached.length; --i >= 0;) { 93bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy if (sCached[i] != null) { 94bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy tl = sCached[i]; 95bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy sCached[i] = null; 96e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return tl; 97e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 98e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 99e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 100e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt tl = new TextLine(); 101bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy if (DEBUG) { 102bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy Log.v("TLINE", "new: " + tl); 103bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy } 104e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return tl; 105e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 106e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 107e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 108e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Puts a TextLine back into the shared pool. Do not use this TextLine once 109e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * it has been returned. 110e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param tl the textLine 111e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return null, as a convenience from clearing references to the provided 112e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * TextLine 113e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 1143630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) 1153630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader public static TextLine recycle(TextLine tl) { 116e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt tl.mText = null; 117e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt tl.mPaint = null; 118e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt tl.mDirections = null; 119893d6fe48d37f71e683f722457bea646994a10bfSvet Ganov tl.mSpanned = null; 120893d6fe48d37f71e683f722457bea646994a10bfSvet Ganov tl.mTabs = null; 121893d6fe48d37f71e683f722457bea646994a10bfSvet Ganov tl.mChars = null; 122beafa1f9d2845ee9b5ca352087de03ed0afe7db7Seigo Nonaka tl.mComputed = null; 123c3fb7a11ad72c5e51ff93e1ad6958f843af0d5b1Gilles Debunne 124c3fb7a11ad72c5e51ff93e1ad6958f843af0d5b1Gilles Debunne tl.mMetricAffectingSpanSpanSet.recycle(); 125c3fb7a11ad72c5e51ff93e1ad6958f843af0d5b1Gilles Debunne tl.mCharacterStyleSpanSet.recycle(); 126c3fb7a11ad72c5e51ff93e1ad6958f843af0d5b1Gilles Debunne tl.mReplacementSpanSpanSet.recycle(); 127c3fb7a11ad72c5e51ff93e1ad6958f843af0d5b1Gilles Debunne 128bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy synchronized(sCached) { 129bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy for (int i = 0; i < sCached.length; ++i) { 130bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy if (sCached[i] == null) { 131bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy sCached[i] = tl; 132f902d7bc49797ec277b4576c921dfffa15d741ddGilles Debunne break; 133e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 134e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 135e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 136e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return null; 137e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 138e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 139e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 140e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Initializes a TextLine and prepares it for use. 141e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 142e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param paint the base paint for the line 143e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param text the text, can be Styled 144e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param start the start of the line relative to the text 145e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param limit the limit of the line relative to the text 146e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param dir the paragraph direction of this line 147e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param directions the directions information of this line 148112d9c7f116bec0a52badde81bd778e59e88cb63Roozbeh Pournader * @param hasTabs true if the line might contain tabs 149c982f60e982c1d2df9f115ed9a5c3ef3643d0892Doug Felt * @param tabStops the tabStops. Can be null. 150e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 1513630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) 1524e90fa262d57c1c1ee72166e2ddfce391696ca24Seigo Nonaka public void set(TextPaint paint, CharSequence text, int start, int limit, int dir, 1534e90fa262d57c1c1ee72166e2ddfce391696ca24Seigo Nonaka Directions directions, boolean hasTabs, TabStops tabStops) { 154e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt mPaint = paint; 155e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt mText = text; 156e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt mStart = start; 157e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt mLen = limit - start; 158e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt mDir = dir; 159e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt mDirections = directions; 1608059e0903e36cbb5cf8b5c5d5d653acc9bbc8402Fabrice Di Meglio if (mDirections == null) { 1618059e0903e36cbb5cf8b5c5d5d653acc9bbc8402Fabrice Di Meglio throw new IllegalArgumentException("Directions cannot be null"); 1628059e0903e36cbb5cf8b5c5d5d653acc9bbc8402Fabrice Di Meglio } 163e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt mHasTabs = hasTabs; 164e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt mSpanned = null; 165e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 166e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean hasReplacement = false; 167e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (text instanceof Spanned) { 168e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt mSpanned = (Spanned) text; 169c1f44830809f0a8526855f13822702ea756214faGilles Debunne mReplacementSpanSpanSet.init(mSpanned, start, limit); 170c1f44830809f0a8526855f13822702ea756214faGilles Debunne hasReplacement = mReplacementSpanSpanSet.numberOfSpans > 0; 171e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 172e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 173beafa1f9d2845ee9b5ca352087de03ed0afe7db7Seigo Nonaka mComputed = null; 174beafa1f9d2845ee9b5ca352087de03ed0afe7db7Seigo Nonaka if (text instanceof PrecomputedText) { 17553145635e4fd724208e01db1ef6187a2212d6090Seigo Nonaka // Here, no need to check line break strategy or hyphenation frequency since there is no 17653145635e4fd724208e01db1ef6187a2212d6090Seigo Nonaka // line break concept here. 177beafa1f9d2845ee9b5ca352087de03ed0afe7db7Seigo Nonaka mComputed = (PrecomputedText) text; 17853145635e4fd724208e01db1ef6187a2212d6090Seigo Nonaka if (!mComputed.getParams().getTextPaint().equalsForTextMeasurement(paint)) { 17953145635e4fd724208e01db1ef6187a2212d6090Seigo Nonaka mComputed = null; 18053145635e4fd724208e01db1ef6187a2212d6090Seigo Nonaka } 1814e90fa262d57c1c1ee72166e2ddfce391696ca24Seigo Nonaka } 1824e90fa262d57c1c1ee72166e2ddfce391696ca24Seigo Nonaka 1831e3ac18e7ad03e02819f3e1a89d6a80a2bb7645fGilles Debunne mCharsValid = hasReplacement || hasTabs || directions != Layout.DIRS_ALL_LEFT_TO_RIGHT; 184e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 185e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (mCharsValid) { 186e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (mChars == null || mChars.length < mLen) { 187776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mChars = ArrayUtils.newUnpaddedCharArray(mLen); 188e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 189e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt TextUtils.getChars(text, start, limit, mChars, 0); 1900c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (hasReplacement) { 1910c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // Handle these all at once so we don't have to do it as we go. 1920c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // Replace the first character of each replacement run with the 1930c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // object-replacement character and the remainder with zero width 1940c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // non-break space aka BOM. Cursor movement code skips these 1950c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // zero-width characters. 1960c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt char[] chars = mChars; 1970c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt for (int i = start, inext; i < limit; i = inext) { 198c1f44830809f0a8526855f13822702ea756214faGilles Debunne inext = mReplacementSpanSpanSet.getNextTransition(i, limit); 199c1f44830809f0a8526855f13822702ea756214faGilles Debunne if (mReplacementSpanSpanSet.hasSpansIntersecting(i, inext)) { 2001e3ac18e7ad03e02819f3e1a89d6a80a2bb7645fGilles Debunne // transition into a span 2010c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt chars[i - start] = '\ufffc'; 2020c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt for (int j = i - start + 1, e = inext - start; j < e; ++j) { 2030c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt chars[j] = '\ufeff'; // used as ZWNBS, marks positions to skip 2040c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 2050c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 2060c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 2070c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 208e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 209c982f60e982c1d2df9f115ed9a5c3ef3643d0892Doug Felt mTabs = tabStops; 21009da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka mAddedWidth = 0; 21109da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka } 21209da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka 21309da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka /** 21409da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka * Justify the line to the given width. 21509da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka */ 2163630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) 2173630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader public void justify(float justifyWidth) { 21809da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka int end = mLen; 21909da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka while (end > 0 && isLineEndSpace(mText.charAt(mStart + end - 1))) { 22009da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka end--; 22109da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka } 22209da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka final int spaces = countStretchableSpaces(0, end); 22309da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka if (spaces == 0) { 22409da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka // There are no stretchable spaces, so we can't help the justification by adding any 22509da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka // width. 22609da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka return; 22709da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka } 22809da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka final float width = Math.abs(measure(end, false, null)); 22909da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka mAddedWidth = (justifyWidth - width) / spaces; 230e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 231e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 232e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 233e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Renders the TextLine. 234e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 235e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param c the canvas to render on 236e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param x the leading margin position 237e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param top the top of the line 238e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param y the baseline 239e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param bottom the bottom of the line 240e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 241e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt void draw(Canvas c, float x, int top, int y, int bottom) { 242e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (!mHasTabs) { 243e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (mDirections == Layout.DIRS_ALL_LEFT_TO_RIGHT) { 244bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy drawRun(c, 0, mLen, false, x, top, y, bottom, false); 245e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return; 246e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 247e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (mDirections == Layout.DIRS_ALL_RIGHT_TO_LEFT) { 248bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy drawRun(c, 0, mLen, true, x, top, y, bottom, false); 249e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return; 250e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 251e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 252e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 253e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt float h = 0; 254e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int[] runs = mDirections.mDirections; 255e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 256e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int lastRunIndex = runs.length - 2; 257e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt for (int i = 0; i < runs.length; i += 2) { 258e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int runStart = runs[i]; 259e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int runLimit = runStart + (runs[i+1] & Layout.RUN_LENGTH_MASK); 260e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (runLimit > mLen) { 261e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runLimit = mLen; 262e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 263e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean runIsRtl = (runs[i+1] & Layout.RUN_RTL_FLAG) != 0; 264e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 265e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int segstart = runStart; 266e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt for (int j = mHasTabs ? runStart : runLimit; j <= runLimit; j++) { 267e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int codept = 0; 268e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (mHasTabs && j < runLimit) { 269e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt codept = mChars[j]; 270112d9c7f116bec0a52badde81bd778e59e88cb63Roozbeh Pournader if (codept >= 0xD800 && codept < 0xDC00 && j + 1 < runLimit) { 271e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt codept = Character.codePointAt(mChars, j); 272112d9c7f116bec0a52badde81bd778e59e88cb63Roozbeh Pournader if (codept > 0xFFFF) { 273e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt ++j; 274e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt continue; 275e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 276e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 277e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 278e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 279112d9c7f116bec0a52badde81bd778e59e88cb63Roozbeh Pournader if (j == runLimit || codept == '\t') { 280bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy h += drawRun(c, segstart, j, runIsRtl, x+h, top, y, bottom, 281e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt i != lastRunIndex || j != mLen); 282e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 283e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (codept == '\t') { 284e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt h = mDir * nextTab(h * mDir); 285e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 286e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt segstart = j + 1; 287e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 288e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 289e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 290e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 291e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 292e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 293e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Returns metrics information for the entire line. 294e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 295e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param fmi receives font metrics information, can be null 296e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the signed width of the line 297e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 2983630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) 2993630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader public float metrics(FontMetricsInt fmi) { 300e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return measure(mLen, false, fmi); 301e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 302e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 303e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 304e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Returns information about a position on the line. 305e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 306e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param offset the line-relative character offset, between 0 and the 307e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * line length, inclusive 308e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param trailing true to measure the trailing edge of the character 309e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * before offset, false to measure the leading edge of the character 310e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * at offset. 311e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param fmi receives metrics information about the requested 312e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * character, can be null. 313e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the signed offset from the leading margin to the requested 314e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * character edge. 315e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 316e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt float measure(int offset, boolean trailing, FontMetricsInt fmi) { 317e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int target = trailing ? offset - 1 : offset; 318e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (target < 0) { 319e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return 0; 320e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 321e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 322e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt float h = 0; 323e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 324e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (!mHasTabs) { 325e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (mDirections == Layout.DIRS_ALL_LEFT_TO_RIGHT) { 326bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy return measureRun(0, offset, mLen, false, fmi); 327e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 328e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (mDirections == Layout.DIRS_ALL_RIGHT_TO_LEFT) { 329bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy return measureRun(0, offset, mLen, true, fmi); 330e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 331e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 332e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 333e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt char[] chars = mChars; 334e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int[] runs = mDirections.mDirections; 335e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt for (int i = 0; i < runs.length; i += 2) { 336e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int runStart = runs[i]; 337e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int runLimit = runStart + (runs[i+1] & Layout.RUN_LENGTH_MASK); 338e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (runLimit > mLen) { 339e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runLimit = mLen; 340e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 341e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean runIsRtl = (runs[i+1] & Layout.RUN_RTL_FLAG) != 0; 342e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 343e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int segstart = runStart; 344e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt for (int j = mHasTabs ? runStart : runLimit; j <= runLimit; j++) { 345e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int codept = 0; 346e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (mHasTabs && j < runLimit) { 347e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt codept = chars[j]; 348112d9c7f116bec0a52badde81bd778e59e88cb63Roozbeh Pournader if (codept >= 0xD800 && codept < 0xDC00 && j + 1 < runLimit) { 349e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt codept = Character.codePointAt(chars, j); 350112d9c7f116bec0a52badde81bd778e59e88cb63Roozbeh Pournader if (codept > 0xFFFF) { 351e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt ++j; 352e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt continue; 353e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 354e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 355e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 356e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 357112d9c7f116bec0a52badde81bd778e59e88cb63Roozbeh Pournader if (j == runLimit || codept == '\t') { 358e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean inSegment = target >= segstart && target < j; 359e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 360e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean advance = (mDir == Layout.DIR_RIGHT_TO_LEFT) == runIsRtl; 361e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (inSegment && advance) { 362a273a70ecbb0d1aaf9aeceec7aa91591290a4871Siyamed Sinir return h + measureRun(segstart, offset, j, runIsRtl, fmi); 363e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 364e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 365bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy float w = measureRun(segstart, j, j, runIsRtl, fmi); 366e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt h += advance ? w : -w; 367e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 368e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (inSegment) { 369a273a70ecbb0d1aaf9aeceec7aa91591290a4871Siyamed Sinir return h + measureRun(segstart, offset, j, runIsRtl, null); 370e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 371e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 372e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (codept == '\t') { 373e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (offset == j) { 374e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return h; 375e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 376e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt h = mDir * nextTab(h * mDir); 377e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (target == j) { 378e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return h; 379e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 380e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 381e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 382e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt segstart = j + 1; 383e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 384e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 385e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 386e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 387e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return h; 388e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 389e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 390e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 391138b106402d86653eaf296a02708737a6e360b58Mihai Popa * @see #measure(int, boolean, FontMetricsInt) 392138b106402d86653eaf296a02708737a6e360b58Mihai Popa * @return The measure results for all possible offsets 393138b106402d86653eaf296a02708737a6e360b58Mihai Popa */ 394138b106402d86653eaf296a02708737a6e360b58Mihai Popa float[] measureAllOffsets(boolean[] trailing, FontMetricsInt fmi) { 395138b106402d86653eaf296a02708737a6e360b58Mihai Popa float[] measurement = new float[mLen + 1]; 396138b106402d86653eaf296a02708737a6e360b58Mihai Popa 397138b106402d86653eaf296a02708737a6e360b58Mihai Popa int[] target = new int[mLen + 1]; 398138b106402d86653eaf296a02708737a6e360b58Mihai Popa for (int offset = 0; offset < target.length; ++offset) { 399138b106402d86653eaf296a02708737a6e360b58Mihai Popa target[offset] = trailing[offset] ? offset - 1 : offset; 400138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 401138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (target[0] < 0) { 402138b106402d86653eaf296a02708737a6e360b58Mihai Popa measurement[0] = 0; 403138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 404138b106402d86653eaf296a02708737a6e360b58Mihai Popa 405138b106402d86653eaf296a02708737a6e360b58Mihai Popa float h = 0; 406138b106402d86653eaf296a02708737a6e360b58Mihai Popa 407138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (!mHasTabs) { 408138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (mDirections == Layout.DIRS_ALL_LEFT_TO_RIGHT) { 409138b106402d86653eaf296a02708737a6e360b58Mihai Popa for (int offset = 0; offset <= mLen; ++offset) { 410138b106402d86653eaf296a02708737a6e360b58Mihai Popa measurement[offset] = measureRun(0, offset, mLen, false, fmi); 411138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 412138b106402d86653eaf296a02708737a6e360b58Mihai Popa return measurement; 413138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 414138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (mDirections == Layout.DIRS_ALL_RIGHT_TO_LEFT) { 415138b106402d86653eaf296a02708737a6e360b58Mihai Popa for (int offset = 0; offset <= mLen; ++offset) { 416138b106402d86653eaf296a02708737a6e360b58Mihai Popa measurement[offset] = measureRun(0, offset, mLen, true, fmi); 417138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 418138b106402d86653eaf296a02708737a6e360b58Mihai Popa return measurement; 419138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 420138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 421138b106402d86653eaf296a02708737a6e360b58Mihai Popa 422138b106402d86653eaf296a02708737a6e360b58Mihai Popa char[] chars = mChars; 423138b106402d86653eaf296a02708737a6e360b58Mihai Popa int[] runs = mDirections.mDirections; 424138b106402d86653eaf296a02708737a6e360b58Mihai Popa for (int i = 0; i < runs.length; i += 2) { 425138b106402d86653eaf296a02708737a6e360b58Mihai Popa int runStart = runs[i]; 426138b106402d86653eaf296a02708737a6e360b58Mihai Popa int runLimit = runStart + (runs[i + 1] & Layout.RUN_LENGTH_MASK); 427138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (runLimit > mLen) { 428138b106402d86653eaf296a02708737a6e360b58Mihai Popa runLimit = mLen; 429138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 430138b106402d86653eaf296a02708737a6e360b58Mihai Popa boolean runIsRtl = (runs[i + 1] & Layout.RUN_RTL_FLAG) != 0; 431138b106402d86653eaf296a02708737a6e360b58Mihai Popa 432138b106402d86653eaf296a02708737a6e360b58Mihai Popa int segstart = runStart; 433138b106402d86653eaf296a02708737a6e360b58Mihai Popa for (int j = mHasTabs ? runStart : runLimit; j <= runLimit; ++j) { 434138b106402d86653eaf296a02708737a6e360b58Mihai Popa int codept = 0; 435138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (mHasTabs && j < runLimit) { 436138b106402d86653eaf296a02708737a6e360b58Mihai Popa codept = chars[j]; 437138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (codept >= 0xD800 && codept < 0xDC00 && j + 1 < runLimit) { 438138b106402d86653eaf296a02708737a6e360b58Mihai Popa codept = Character.codePointAt(chars, j); 439138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (codept > 0xFFFF) { 440138b106402d86653eaf296a02708737a6e360b58Mihai Popa ++j; 441138b106402d86653eaf296a02708737a6e360b58Mihai Popa continue; 442138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 443138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 444138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 445138b106402d86653eaf296a02708737a6e360b58Mihai Popa 446138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (j == runLimit || codept == '\t') { 447138b106402d86653eaf296a02708737a6e360b58Mihai Popa float oldh = h; 448138b106402d86653eaf296a02708737a6e360b58Mihai Popa boolean advance = (mDir == Layout.DIR_RIGHT_TO_LEFT) == runIsRtl; 449138b106402d86653eaf296a02708737a6e360b58Mihai Popa float w = measureRun(segstart, j, j, runIsRtl, fmi); 450138b106402d86653eaf296a02708737a6e360b58Mihai Popa h += advance ? w : -w; 451138b106402d86653eaf296a02708737a6e360b58Mihai Popa 452138b106402d86653eaf296a02708737a6e360b58Mihai Popa float baseh = advance ? oldh : h; 453138b106402d86653eaf296a02708737a6e360b58Mihai Popa FontMetricsInt crtfmi = advance ? fmi : null; 454138b106402d86653eaf296a02708737a6e360b58Mihai Popa for (int offset = segstart; offset <= j && offset <= mLen; ++offset) { 455138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (target[offset] >= segstart && target[offset] < j) { 456138b106402d86653eaf296a02708737a6e360b58Mihai Popa measurement[offset] = 457138b106402d86653eaf296a02708737a6e360b58Mihai Popa baseh + measureRun(segstart, offset, j, runIsRtl, crtfmi); 458138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 459138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 460138b106402d86653eaf296a02708737a6e360b58Mihai Popa 461138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (codept == '\t') { 462138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (target[j] == j) { 463138b106402d86653eaf296a02708737a6e360b58Mihai Popa measurement[j] = h; 464138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 465138b106402d86653eaf296a02708737a6e360b58Mihai Popa h = mDir * nextTab(h * mDir); 466138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (target[j + 1] == j) { 467138b106402d86653eaf296a02708737a6e360b58Mihai Popa measurement[j + 1] = h; 468138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 469138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 470138b106402d86653eaf296a02708737a6e360b58Mihai Popa 471138b106402d86653eaf296a02708737a6e360b58Mihai Popa segstart = j + 1; 472138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 473138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 474138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 475138b106402d86653eaf296a02708737a6e360b58Mihai Popa if (target[mLen] == mLen) { 476138b106402d86653eaf296a02708737a6e360b58Mihai Popa measurement[mLen] = h; 477138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 478138b106402d86653eaf296a02708737a6e360b58Mihai Popa 479138b106402d86653eaf296a02708737a6e360b58Mihai Popa return measurement; 480138b106402d86653eaf296a02708737a6e360b58Mihai Popa } 481138b106402d86653eaf296a02708737a6e360b58Mihai Popa 482138b106402d86653eaf296a02708737a6e360b58Mihai Popa /** 483e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Draws a unidirectional (but possibly multi-styled) run of text. 484e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 485bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy * 486e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param c the canvas to draw on 487e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param start the line-relative start 488e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param limit the line-relative limit 489e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param runIsRtl true if the run is right-to-left 490e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param x the position of the run that is closest to the leading margin 491e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param top the top of the line 492e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param y the baseline 493e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param bottom the bottom of the line 494e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param needWidth true if the width value is required. 495e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the signed width of the run, based on the paragraph direction. 496e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Only valid if needWidth is true. 497e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 498bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy private float drawRun(Canvas c, int start, 499e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int limit, boolean runIsRtl, float x, int top, int y, int bottom, 500e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean needWidth) { 501e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 502e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if ((mDir == Layout.DIR_LEFT_TO_RIGHT) == runIsRtl) { 503bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy float w = -measureRun(start, limit, limit, runIsRtl, null); 504bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy handleRun(start, limit, limit, runIsRtl, c, x + w, top, 5050c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt y, bottom, null, false); 506e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return w; 507e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 508e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 509bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy return handleRun(start, limit, limit, runIsRtl, c, x, top, 5100c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt y, bottom, null, needWidth); 511e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 512e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 513e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 514e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Measures a unidirectional (but possibly multi-styled) run of text. 515e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 516bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy * 517e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param start the line-relative start of the run 518e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param offset the offset to measure to, between start and limit inclusive 519e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param limit the line-relative limit of the run 520e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param runIsRtl true if the run is right-to-left 521e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param fmi receives metrics information about the requested 522e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * run, can be null. 523e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the signed width from the start of the run to the leading edge 524e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * of the character at offset, based on the run (not paragraph) direction 525e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 526bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy private float measureRun(int start, int offset, int limit, boolean runIsRtl, 527bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy FontMetricsInt fmi) { 528bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy return handleRun(start, offset, limit, runIsRtl, null, 0, 0, 0, 0, fmi, true); 529e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 530e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 531e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 532e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Walk the cursor through this line, skipping conjuncts and 533e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * zero-width characters. 534e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 535e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * <p>This function cannot properly walk the cursor off the ends of the line 536e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * since it does not know about any shaping on the previous/following line 537e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * that might affect the cursor position. Callers must either avoid these 538e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * situations or handle the result specially. 539e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 540e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param cursor the starting position of the cursor, between 0 and the 541e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * length of the line, inclusive 542e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param toLeft true if the caret is moving to the left. 543e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the new offset. If it is less than 0 or greater than the length 544e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * of the line, the previous/following line should be examined to get the 545e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * actual offset. 546e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 547e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int getOffsetToLeftRightOf(int cursor, boolean toLeft) { 548e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // 1) The caret marks the leading edge of a character. The character 549e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // logically before it might be on a different level, and the active caret 550e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // position is on the character at the lower level. If that character 551e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // was the previous character, the caret is on its trailing edge. 552e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // 2) Take this character/edge and move it in the indicated direction. 553e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // This gives you a new character and a new edge. 554e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // 3) This position is between two visually adjacent characters. One of 555e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // these might be at a lower level. The active position is on the 556e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // character at the lower level. 557e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // 4) If the active position is on the trailing edge of the character, 558e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // the new caret position is the following logical character, else it 559e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // is the character. 560e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 561e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int lineStart = 0; 562e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int lineEnd = mLen; 563e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean paraIsRtl = mDir == -1; 564e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int[] runs = mDirections.mDirections; 565e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 566e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int runIndex, runLevel = 0, runStart = lineStart, runLimit = lineEnd, newCaret = -1; 567e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean trailing = false; 568e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 569e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (cursor == lineStart) { 570e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runIndex = -2; 571e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } else if (cursor == lineEnd) { 572e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runIndex = runs.length; 573e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } else { 574e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // First, get information about the run containing the character with 575e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // the active caret. 576e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt for (runIndex = 0; runIndex < runs.length; runIndex += 2) { 577e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runStart = lineStart + runs[runIndex]; 578e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (cursor >= runStart) { 579e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runLimit = runStart + (runs[runIndex+1] & Layout.RUN_LENGTH_MASK); 580e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (runLimit > lineEnd) { 581e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runLimit = lineEnd; 582e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 583e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (cursor < runLimit) { 584e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runLevel = (runs[runIndex+1] >>> Layout.RUN_LEVEL_SHIFT) & 585e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt Layout.RUN_LEVEL_MASK; 586e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (cursor == runStart) { 587e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // The caret is on a run boundary, see if we should 588e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // use the position on the trailing edge of the previous 589e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // logical character instead. 590e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int prevRunIndex, prevRunLevel, prevRunStart, prevRunLimit; 591e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int pos = cursor - 1; 592e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt for (prevRunIndex = 0; prevRunIndex < runs.length; prevRunIndex += 2) { 593e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt prevRunStart = lineStart + runs[prevRunIndex]; 594e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (pos >= prevRunStart) { 595e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt prevRunLimit = prevRunStart + 596e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt (runs[prevRunIndex+1] & Layout.RUN_LENGTH_MASK); 597e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (prevRunLimit > lineEnd) { 598e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt prevRunLimit = lineEnd; 599e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 600e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (pos < prevRunLimit) { 601e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt prevRunLevel = (runs[prevRunIndex+1] >>> Layout.RUN_LEVEL_SHIFT) 602e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt & Layout.RUN_LEVEL_MASK; 603e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (prevRunLevel < runLevel) { 604e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // Start from logically previous character. 605e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runIndex = prevRunIndex; 606e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runLevel = prevRunLevel; 607e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runStart = prevRunStart; 608e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runLimit = prevRunLimit; 609e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt trailing = true; 610e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt break; 611e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 612e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 613e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 614e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 615e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 616e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt break; 617e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 618e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 619e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 620e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 621e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // caret might be == lineEnd. This is generally a space or paragraph 622e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // separator and has an associated run, but might be the end of 623e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // text, in which case it doesn't. If that happens, we ran off the 624e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // end of the run list, and runIndex == runs.length. In this case, 625e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // we are at a run boundary so we skip the below test. 626e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (runIndex != runs.length) { 627e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean runIsRtl = (runLevel & 0x1) != 0; 628e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean advance = toLeft == runIsRtl; 629e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (cursor != (advance ? runLimit : runStart) || advance != trailing) { 630e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // Moving within or into the run, so we can move logically. 6310c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt newCaret = getOffsetBeforeAfter(runIndex, runStart, runLimit, 6320c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt runIsRtl, cursor, advance); 633e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // If the new position is internal to the run, we're at the strong 634e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // position already so we're finished. 635e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (newCaret != (advance ? runLimit : runStart)) { 636e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return newCaret; 637e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 638e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 639e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 640e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 641e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 642e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // If newCaret is -1, we're starting at a run boundary and crossing 643e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // into another run. Otherwise we've arrived at a run boundary, and 644e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // need to figure out which character to attach to. Note we might 645e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // need to run this twice, if we cross a run boundary and end up at 646e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // another run boundary. 647e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt while (true) { 648e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean advance = toLeft == paraIsRtl; 649e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int otherRunIndex = runIndex + (advance ? 2 : -2); 650e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (otherRunIndex >= 0 && otherRunIndex < runs.length) { 651e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int otherRunStart = lineStart + runs[otherRunIndex]; 652e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int otherRunLimit = otherRunStart + 653e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt (runs[otherRunIndex+1] & Layout.RUN_LENGTH_MASK); 654e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (otherRunLimit > lineEnd) { 655e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt otherRunLimit = lineEnd; 656e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 657e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int otherRunLevel = (runs[otherRunIndex+1] >>> Layout.RUN_LEVEL_SHIFT) & 658e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt Layout.RUN_LEVEL_MASK; 659e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt boolean otherRunIsRtl = (otherRunLevel & 1) != 0; 660e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 661e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt advance = toLeft == otherRunIsRtl; 662e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (newCaret == -1) { 6630c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt newCaret = getOffsetBeforeAfter(otherRunIndex, otherRunStart, 6640c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt otherRunLimit, otherRunIsRtl, 665e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt advance ? otherRunStart : otherRunLimit, advance); 666e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (newCaret == (advance ? otherRunLimit : otherRunStart)) { 667e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // Crossed and ended up at a new boundary, 668e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // repeat a second and final time. 669e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runIndex = otherRunIndex; 670e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt runLevel = otherRunLevel; 671e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt continue; 672e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 673e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt break; 674e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 675e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 676e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // The new caret is at a boundary. 677e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (otherRunLevel < runLevel) { 678e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // The strong character is in the other run. 679e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt newCaret = advance ? otherRunStart : otherRunLimit; 680e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 681e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt break; 682e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 683e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 684e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (newCaret == -1) { 685e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // We're walking off the end of the line. The paragraph 686e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // level is always equal to or lower than any internal level, so 687e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // the boundaries get the strong caret. 6880c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt newCaret = advance ? mLen + 1 : -1; 689e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt break; 690e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 691e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 692e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // Else we've arrived at the end of the line. That's a strong position. 693e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // We might have arrived here by crossing over a run with no internal 694e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // breaks and dropping out of the above loop before advancing one final 695e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // time, so reset the caret. 696e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // Note, we use '<=' below to handle a situation where the only run 697e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // on the line is a counter-directional run. If we're not advancing, 698e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // we can end up at the 'lineEnd' position but the caret we want is at 699e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // the lineStart. 700e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (newCaret <= lineEnd) { 701e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt newCaret = advance ? lineEnd : lineStart; 702e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 703e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt break; 704e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 705e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 706e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return newCaret; 707e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 708e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 709e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 710e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Returns the next valid offset within this directional run, skipping 711e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * conjuncts and zero-width characters. This should not be called to walk 712cc3ec6cdb2b892eb29513e72d8b205acbe997b25Gilles Debunne * off the end of the line, since the returned values might not be valid 7130c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * on neighboring lines. If the returned offset is less than zero or 7140c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * greater than the line length, the offset should be recomputed on the 7150c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * preceding or following line, respectively. 716e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 717e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param runIndex the run index 7180c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * @param runStart the start of the run 7190c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * @param runLimit the limit of the run 7200c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * @param runIsRtl true if the run is right-to-left 721e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param offset the offset 722e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param after true if the new offset should logically follow the provided 723e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * offset 724e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the new offset 725e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 7260c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt private int getOffsetBeforeAfter(int runIndex, int runStart, int runLimit, 7270c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt boolean runIsRtl, int offset, boolean after) { 728e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 7290c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (runIndex < 0 || offset == (after ? mLen : 0)) { 7300c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // Walking off end of line. Since we don't know 7310c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // what cursor positions are available on other lines, we can't 7320c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // return accurate values. These are a guess. 733e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (after) { 7340c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt return TextUtils.getOffsetAfter(mText, offset + mStart) - mStart; 7350c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 7360c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt return TextUtils.getOffsetBefore(mText, offset + mStart) - mStart; 7370c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 7380c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt 7390c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt TextPaint wp = mWorkPaint; 7400c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt wp.set(mPaint); 74109da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka wp.setWordSpacing(mAddedWidth); 7420c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt 7430c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int spanStart = runStart; 7440c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int spanLimit; 7450c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (mSpanned == null) { 7460c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt spanLimit = runLimit; 7470c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } else { 7480c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int target = after ? offset + 1 : offset; 7490c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int limit = mStart + runLimit; 7500c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt while (true) { 7510c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt spanLimit = mSpanned.nextSpanTransition(mStart + spanStart, limit, 7520c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt MetricAffectingSpan.class) - mStart; 7530c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (spanLimit >= target) { 7540c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt break; 755e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 7560c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt spanStart = spanLimit; 7570c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 7580c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt 7590c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt MetricAffectingSpan[] spans = mSpanned.getSpans(mStart + spanStart, 7600c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt mStart + spanLimit, MetricAffectingSpan.class); 7611e3ac18e7ad03e02819f3e1a89d6a80a2bb7645fGilles Debunne spans = TextUtils.removeEmptySpans(spans, mSpanned, MetricAffectingSpan.class); 7620c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt 7630c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (spans.length > 0) { 7640c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt ReplacementSpan replacement = null; 7650c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt for (int j = 0; j < spans.length; j++) { 7660c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt MetricAffectingSpan span = spans[j]; 7670c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (span instanceof ReplacementSpan) { 7680c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt replacement = (ReplacementSpan)span; 7690c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } else { 7700c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt span.updateMeasureState(wp); 7710c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 7720c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 7730c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt 7740c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (replacement != null) { 7750c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // If we have a replacement span, we're moving either to 7760c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // the start or end of this span. 7770c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt return after ? spanLimit : spanStart; 778e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 779e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 780e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 781e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 782051910b9f998030dacb8a0722588cc715813fde1Raph Levien int dir = runIsRtl ? Paint.DIRECTION_RTL : Paint.DIRECTION_LTR; 7830c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int cursorOpt = after ? Paint.CURSOR_AFTER : Paint.CURSOR_BEFORE; 7840c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (mCharsValid) { 7850c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt return wp.getTextRunCursor(mChars, spanStart, spanLimit - spanStart, 786051910b9f998030dacb8a0722588cc715813fde1Raph Levien dir, offset, cursorOpt); 7870c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } else { 7880c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt return wp.getTextRunCursor(mText, mStart + spanStart, 789051910b9f998030dacb8a0722588cc715813fde1Raph Levien mStart + spanLimit, dir, mStart + offset, cursorOpt) - mStart; 790e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 791e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 792e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 793e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 7940bb000931bb841e75903d655552d1626ae158707Gilles Debunne * @param wp 7950bb000931bb841e75903d655552d1626ae158707Gilles Debunne */ 7960bb000931bb841e75903d655552d1626ae158707Gilles Debunne private static void expandMetricsFromPaint(FontMetricsInt fmi, TextPaint wp) { 7970bb000931bb841e75903d655552d1626ae158707Gilles Debunne final int previousTop = fmi.top; 7980bb000931bb841e75903d655552d1626ae158707Gilles Debunne final int previousAscent = fmi.ascent; 7990bb000931bb841e75903d655552d1626ae158707Gilles Debunne final int previousDescent = fmi.descent; 8000bb000931bb841e75903d655552d1626ae158707Gilles Debunne final int previousBottom = fmi.bottom; 8010bb000931bb841e75903d655552d1626ae158707Gilles Debunne final int previousLeading = fmi.leading; 8020bb000931bb841e75903d655552d1626ae158707Gilles Debunne 8030bb000931bb841e75903d655552d1626ae158707Gilles Debunne wp.getFontMetricsInt(fmi); 8040bb000931bb841e75903d655552d1626ae158707Gilles Debunne 8058a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio updateMetrics(fmi, previousTop, previousAscent, previousDescent, previousBottom, 8068a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio previousLeading); 8078a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio } 8088a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio 8098a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio static void updateMetrics(FontMetricsInt fmi, int previousTop, int previousAscent, 8108a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio int previousDescent, int previousBottom, int previousLeading) { 8110bb000931bb841e75903d655552d1626ae158707Gilles Debunne fmi.top = Math.min(fmi.top, previousTop); 8120bb000931bb841e75903d655552d1626ae158707Gilles Debunne fmi.ascent = Math.min(fmi.ascent, previousAscent); 8130bb000931bb841e75903d655552d1626ae158707Gilles Debunne fmi.descent = Math.max(fmi.descent, previousDescent); 8140bb000931bb841e75903d655552d1626ae158707Gilles Debunne fmi.bottom = Math.max(fmi.bottom, previousBottom); 8150bb000931bb841e75903d655552d1626ae158707Gilles Debunne fmi.leading = Math.max(fmi.leading, previousLeading); 8160bb000931bb841e75903d655552d1626ae158707Gilles Debunne } 8170bb000931bb841e75903d655552d1626ae158707Gilles Debunne 8181378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader private static void drawStroke(TextPaint wp, Canvas c, int color, float position, 8191378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader float thickness, float xleft, float xright, float baseline) { 8201378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final float strokeTop = baseline + wp.baselineShift + position; 821538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 822538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final int previousColor = wp.getColor(); 823538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final Paint.Style previousStyle = wp.getStyle(); 824538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final boolean previousAntiAlias = wp.isAntiAlias(); 825538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 826538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader wp.setStyle(Paint.Style.FILL); 827538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader wp.setAntiAlias(true); 828538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 829538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader wp.setColor(color); 8301378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader c.drawRect(xleft, strokeTop, xright, strokeTop + thickness, wp); 831538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 832538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader wp.setStyle(previousStyle); 833538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader wp.setColor(previousColor); 834538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader wp.setAntiAlias(previousAntiAlias); 835538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 836538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 837538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader private float getRunAdvance(TextPaint wp, int start, int end, int contextStart, int contextEnd, 838538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader boolean runIsRtl, int offset) { 839538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader if (mCharsValid) { 840538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader return wp.getRunAdvance(mChars, start, end, contextStart, contextEnd, runIsRtl, offset); 841538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } else { 842538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final int delta = mStart; 843beafa1f9d2845ee9b5ca352087de03ed0afe7db7Seigo Nonaka if (mComputed == null) { 844783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka // TODO: Enable measured getRunAdvance for ReplacementSpan and RTL text. 845783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka return wp.getRunAdvance(mText, delta + start, delta + end, 846783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka delta + contextStart, delta + contextEnd, runIsRtl, delta + offset); 847783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka } else { 848beafa1f9d2845ee9b5ca352087de03ed0afe7db7Seigo Nonaka return mComputed.getWidth(start + delta, end + delta); 849783f961d2fa6f916009844dafeaa08ffaf96a4d3Seigo Nonaka } 850538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 851538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 852538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 8530bb000931bb841e75903d655552d1626ae158707Gilles Debunne /** 854e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Utility function for measuring and rendering text. The text must 855112d9c7f116bec0a52badde81bd778e59e88cb63Roozbeh Pournader * not include a tab. 856e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 857e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param wp the working paint 858e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param start the start of the text 8590c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * @param end the end of the text 860e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param runIsRtl true if the run is right-to-left 861e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param c the canvas, can be null if rendering is not needed 862e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param x the edge of the run closest to the leading margin 863e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param top the top of the line 864e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param y the baseline 865e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param bottom the bottom of the line 866e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param fmi receives metrics information, can be null 867e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param needWidth true if the width of the run is needed 868909c7bca570b6f50650d0872e2037389b29252e3Raph Levien * @param offset the offset for the purpose of measuring 8691378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader * @param decorations the list of locations and paremeters for drawing decorations 870e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the signed width of the run based on the run direction; only 871e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * valid if needWidth is true 872e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 8730c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt private float handleText(TextPaint wp, int start, int end, 8740c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int contextStart, int contextEnd, boolean runIsRtl, 8750c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt Canvas c, float x, int top, int y, int bottom, 876538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader FontMetricsInt fmi, boolean needWidth, int offset, 8771378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader @Nullable ArrayList<DecorationInfo> decorations) { 878e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 87909da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka wp.setWordSpacing(mAddedWidth); 880850dffa01ba9111799f24800ae8550eca457d757Fabrice Di Meglio // Get metrics first (even for empty strings or "0" width runs) 881850dffa01ba9111799f24800ae8550eca457d757Fabrice Di Meglio if (fmi != null) { 882850dffa01ba9111799f24800ae8550eca457d757Fabrice Di Meglio expandMetricsFromPaint(fmi, wp); 883850dffa01ba9111799f24800ae8550eca457d757Fabrice Di Meglio } 884e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 885850dffa01ba9111799f24800ae8550eca457d757Fabrice Di Meglio // No need to do anything if the run width is "0" 886538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader if (end == start) { 887850dffa01ba9111799f24800ae8550eca457d757Fabrice Di Meglio return 0f; 888850dffa01ba9111799f24800ae8550eca457d757Fabrice Di Meglio } 889850dffa01ba9111799f24800ae8550eca457d757Fabrice Di Meglio 890538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader float totalWidth = 0; 891850dffa01ba9111799f24800ae8550eca457d757Fabrice Di Meglio 8921378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final int numDecorations = decorations == null ? 0 : decorations.size(); 8931378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader if (needWidth || (c != null && (wp.bgColor != 0 || numDecorations != 0 || runIsRtl))) { 894538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader totalWidth = getRunAdvance(wp, start, end, contextStart, contextEnd, runIsRtl, offset); 895e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 896e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 897e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (c != null) { 898538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final float leftX, rightX; 899e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (runIsRtl) { 900538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader leftX = x - totalWidth; 901538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader rightX = x; 902538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } else { 903538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader leftX = x; 904538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader rightX = x + totalWidth; 905e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 906e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 907e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (wp.bgColor != 0) { 908dd8f5ed79c7baed35b3f04e4778aff7867653255Gilles Debunne int previousColor = wp.getColor(); 909dd8f5ed79c7baed35b3f04e4778aff7867653255Gilles Debunne Paint.Style previousStyle = wp.getStyle(); 910dd8f5ed79c7baed35b3f04e4778aff7867653255Gilles Debunne 911e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt wp.setColor(wp.bgColor); 912e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt wp.setStyle(Paint.Style.FILL); 913538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader c.drawRect(leftX, top, rightX, bottom, wp); 914e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 915dd8f5ed79c7baed35b3f04e4778aff7867653255Gilles Debunne wp.setStyle(previousStyle); 916dd8f5ed79c7baed35b3f04e4778aff7867653255Gilles Debunne wp.setColor(previousColor); 917dd8f5ed79c7baed35b3f04e4778aff7867653255Gilles Debunne } 918dd8f5ed79c7baed35b3f04e4778aff7867653255Gilles Debunne 9191378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader if (numDecorations != 0) { 9201378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader for (int i = 0; i < numDecorations; i++) { 9211378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final DecorationInfo info = decorations.get(i); 9221378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader 9231378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final int decorationStart = Math.max(info.start, start); 9241378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final int decorationEnd = Math.min(info.end, offset); 9251378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader float decorationStartAdvance = getRunAdvance( 9261378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader wp, start, end, contextStart, contextEnd, runIsRtl, decorationStart); 9271378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader float decorationEndAdvance = getRunAdvance( 9281378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader wp, start, end, contextStart, contextEnd, runIsRtl, decorationEnd); 9291378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final float decorationXLeft, decorationXRight; 930538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader if (runIsRtl) { 9311378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader decorationXLeft = rightX - decorationEndAdvance; 9321378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader decorationXRight = rightX - decorationStartAdvance; 933538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } else { 9341378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader decorationXLeft = leftX + decorationStartAdvance; 9351378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader decorationXRight = leftX + decorationEndAdvance; 936538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 937702c9f92fcb1fbdfdca07a2627d5f75dbca7b557Siyamed Sinir 938538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // Theoretically, there could be cases where both Paint's and TextPaint's 939538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // setUnderLineText() are called. For backward compatibility, we need to draw 940538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // both underlines, the one with custom color first. 941538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader if (info.underlineColor != 0) { 9421378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader drawStroke(wp, c, info.underlineColor, wp.getUnderlinePosition(), 9431378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader info.underlineThickness, decorationXLeft, decorationXRight, y); 944538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 945538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader if (info.isUnderlineText) { 946ca8a04a36640eb227a556ad9ced925c48ced2495Roozbeh Pournader final float thickness = 947a273a70ecbb0d1aaf9aeceec7aa91591290a4871Siyamed Sinir Math.max(wp.getUnderlineThickness(), 1.0f); 9481378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader drawStroke(wp, c, wp.getColor(), wp.getUnderlinePosition(), thickness, 9491378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader decorationXLeft, decorationXRight, y); 9501378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader } 9511378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader 9521378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader if (info.isStrikeThruText) { 9531378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final float thickness = 954a273a70ecbb0d1aaf9aeceec7aa91591290a4871Siyamed Sinir Math.max(wp.getStrikeThruThickness(), 1.0f); 9551378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader drawStroke(wp, c, wp.getColor(), wp.getStrikeThruPosition(), thickness, 9561378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader decorationXLeft, decorationXRight, y); 957538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 958538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 959e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 960e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 961da12f389eb4be0c08ca3fa9ca7663f4977858df5Fabrice Di Meglio drawTextRun(c, wp, start, end, contextStart, contextEnd, runIsRtl, 962538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader leftX, y + wp.baselineShift); 963e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 964e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 965538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader return runIsRtl ? -totalWidth : totalWidth; 966e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 967e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 968e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 969e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Utility function for measuring and rendering a replacement. 970e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 971bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy * 972e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param replacement the replacement 973e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param wp the work paint 974e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param start the start of the run 975e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param limit the limit of the run 976e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param runIsRtl true if the run is right-to-left 977e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param c the canvas, can be null if not rendering 978e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param x the edge of the replacement closest to the leading margin 979e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param top the top of the line 980e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param y the baseline 981e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param bottom the bottom of the line 982e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param fmi receives metrics information, can be null 983e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param needWidth true if the width of the replacement is needed 984e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the signed width of the run based on the run direction; only 985e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * valid if needWidth is true 986e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 987e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private float handleReplacement(ReplacementSpan replacement, TextPaint wp, 988bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy int start, int limit, boolean runIsRtl, Canvas c, 989e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt float x, int top, int y, int bottom, FontMetricsInt fmi, 9900c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt boolean needWidth) { 991e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 992e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt float ret = 0; 993e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 9940c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int textStart = mStart + start; 9950c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int textLimit = mStart + limit; 996e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 9970c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (needWidth || (c != null && runIsRtl)) { 9988a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio int previousTop = 0; 9998a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio int previousAscent = 0; 10008a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio int previousDescent = 0; 10018a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio int previousBottom = 0; 10028a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio int previousLeading = 0; 10038a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio 10048a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio boolean needUpdateMetrics = (fmi != null); 10058a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio 10068a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio if (needUpdateMetrics) { 10078a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio previousTop = fmi.top; 10088a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio previousAscent = fmi.ascent; 10098a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio previousDescent = fmi.descent; 10108a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio previousBottom = fmi.bottom; 10118a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio previousLeading = fmi.leading; 10128a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio } 10138a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio 10140c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt ret = replacement.getSize(wp, mText, textStart, textLimit, fmi); 10158a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio 10168a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio if (needUpdateMetrics) { 10178a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio updateMetrics(fmi, previousTop, previousAscent, previousDescent, previousBottom, 10188a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio previousLeading); 10198a5137a5aeba39cbc2c57c83ef79241b446d0cb7Fabrice Di Meglio } 10200c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt } 1021e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 10220c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (c != null) { 10230c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt if (runIsRtl) { 10240c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt x -= ret; 1025e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 10260c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt replacement.draw(c, mText, textStart, textLimit, 10270c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt x, top, y, bottom, wp); 1028e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1029e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 1030e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt return runIsRtl ? -ret : ret; 1031e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1032945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne 103346c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader private int adjustHyphenEdit(int start, int limit, int hyphenEdit) { 103446c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader int result = hyphenEdit; 103546c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader // Only draw hyphens on first or last run in line. Disable them otherwise. 103646c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader if (start > 0) { // not the first run 103746c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader result &= ~Paint.HYPHENEDIT_MASK_START_OF_LINE; 103846c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader } 103946c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader if (limit < mLen) { // not the last run 104046c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader result &= ~Paint.HYPHENEDIT_MASK_END_OF_LINE; 104146c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader } 104246c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader return result; 104346c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader } 104446c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader 10451378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader private static final class DecorationInfo { 10461378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader public boolean isStrikeThruText; 1047538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader public boolean isUnderlineText; 1048538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader public int underlineColor; 1049538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader public float underlineThickness; 1050538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader public int start = -1; 1051538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader public int end = -1; 1052538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 10531378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader public boolean hasDecoration() { 10541378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader return isStrikeThruText || isUnderlineText || underlineColor != 0; 1055538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 1056538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 1057538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // Copies the info, but not the start and end range. 10581378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader public DecorationInfo copyInfo() { 10591378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final DecorationInfo copy = new DecorationInfo(); 10601378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader copy.isStrikeThruText = isStrikeThruText; 1061538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader copy.isUnderlineText = isUnderlineText; 1062538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader copy.underlineColor = underlineColor; 1063538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader copy.underlineThickness = underlineThickness; 1064538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader return copy; 1065538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 1066538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 1067538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 10681378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader private void extractDecorationInfo(@NonNull TextPaint paint, @NonNull DecorationInfo info) { 10691378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader info.isStrikeThruText = paint.isStrikeThruText(); 10701378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader if (info.isStrikeThruText) { 10711378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader paint.setStrikeThruText(false); 10721378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader } 1073538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader info.isUnderlineText = paint.isUnderlineText(); 1074538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader if (info.isUnderlineText) { 1075538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader paint.setUnderlineText(false); 1076538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 1077538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader info.underlineColor = paint.underlineColor; 1078538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader info.underlineThickness = paint.underlineThickness; 1079538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader paint.setUnderlineText(0, 0.0f); 1080538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 1081538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 1082e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 1083e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Utility function for handling a unidirectional run. The run must not 1084112d9c7f116bec0a52badde81bd778e59e88cb63Roozbeh Pournader * contain tabs but can contain styles. 1085e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 1086bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy * 1087e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param start the line-relative start of the run 10880c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * @param measureLimit the offset to measure to, between start and limit inclusive 1089e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param limit the limit of the run 1090e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param runIsRtl true if the run is right-to-left 1091e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param c the canvas, can be null 1092e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param x the end of the run closest to the leading margin 1093e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param top the top of the line 1094e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param y the baseline 1095e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param bottom the bottom of the line 1096e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param fmi receives metrics information, can be null 1097e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param needWidth true if the width is required 1098e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the signed width of the run based on the run direction; only 1099e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * valid if needWidth is true 1100e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 1101bc7cdb6783d059249133b1c0baf52c305c6b4a33Romain Guy private float handleRun(int start, int measureLimit, 1102e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt int limit, boolean runIsRtl, Canvas c, float x, int top, int y, 11030c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int bottom, FontMetricsInt fmi, boolean needWidth) { 1104e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 11059f3958cc2ba3da1406caac64650620d226bf8562Siyamed Sinir if (measureLimit < start || measureLimit > limit) { 11069f3958cc2ba3da1406caac64650620d226bf8562Siyamed Sinir throw new IndexOutOfBoundsException("measureLimit (" + measureLimit + ") is out of " 11079f3958cc2ba3da1406caac64650620d226bf8562Siyamed Sinir + "start (" + start + ") and limit (" + limit + ") bounds"); 11089f3958cc2ba3da1406caac64650620d226bf8562Siyamed Sinir } 11099f3958cc2ba3da1406caac64650620d226bf8562Siyamed Sinir 1110f483e514d4ed3b93cc5ba22beb9c85efcda75535Gilles Debunne // Case of an empty line, make sure we update fmi according to mPaint 1111f483e514d4ed3b93cc5ba22beb9c85efcda75535Gilles Debunne if (start == measureLimit) { 1112538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final TextPaint wp = mWorkPaint; 1113f483e514d4ed3b93cc5ba22beb9c85efcda75535Gilles Debunne wp.set(mPaint); 111415c097a1c23105cdc0dd66dd5605ff35467d7118Fabrice Di Meglio if (fmi != null) { 111515c097a1c23105cdc0dd66dd5605ff35467d7118Fabrice Di Meglio expandMetricsFromPaint(fmi, wp); 111615c097a1c23105cdc0dd66dd5605ff35467d7118Fabrice Di Meglio } 111715c097a1c23105cdc0dd66dd5605ff35467d7118Fabrice Di Meglio return 0f; 1118f483e514d4ed3b93cc5ba22beb9c85efcda75535Gilles Debunne } 1119f483e514d4ed3b93cc5ba22beb9c85efcda75535Gilles Debunne 112008836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader final boolean needsSpanMeasurement; 1121945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne if (mSpanned == null) { 112208836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader needsSpanMeasurement = false; 112308836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader } else { 112408836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader mMetricAffectingSpanSpanSet.init(mSpanned, mStart + start, mStart + limit); 112508836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader mCharacterStyleSpanSet.init(mSpanned, mStart + start, mStart + limit); 112608836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader needsSpanMeasurement = mMetricAffectingSpanSpanSet.numberOfSpans != 0 112708836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader || mCharacterStyleSpanSet.numberOfSpans != 0; 112808836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader } 112908836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader 113008836d4ca5e1dab422575f1f0a1ad617a59e6ba0Roozbeh Pournader if (!needsSpanMeasurement) { 1131538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final TextPaint wp = mWorkPaint; 1132945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne wp.set(mPaint); 113346c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader wp.setHyphenEdit(adjustHyphenEdit(start, limit, wp.getHyphenEdit())); 1134909c7bca570b6f50650d0872e2037389b29252e3Raph Levien return handleText(wp, start, limit, start, limit, runIsRtl, c, x, top, 1135538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader y, bottom, fmi, needWidth, measureLimit, null); 1136945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne } 1137945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne 1138e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // Shaping needs to take into account context up to metric boundaries, 1139e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt // but rendering needs to take into account character style boundaries. 11400c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // So we iterate through metric runs to get metric bounds, 11410c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // then within each metric run iterate through character style runs 11420c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt // for the run bounds. 1143945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne final float originalX = x; 11440c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt for (int i = start, inext; i < measureLimit; i = inext) { 1145538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final TextPaint wp = mWorkPaint; 1146e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt wp.set(mPaint); 1147e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 1148c1f44830809f0a8526855f13822702ea756214faGilles Debunne inext = mMetricAffectingSpanSpanSet.getNextTransition(mStart + i, mStart + limit) - 1149c1f44830809f0a8526855f13822702ea756214faGilles Debunne mStart; 1150945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne int mlimit = Math.min(inext, measureLimit); 1151945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne 1152945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne ReplacementSpan replacement = null; 1153945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne 1154c1f44830809f0a8526855f13822702ea756214faGilles Debunne for (int j = 0; j < mMetricAffectingSpanSpanSet.numberOfSpans; j++) { 1155945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne // Both intervals [spanStarts..spanEnds] and [mStart + i..mStart + mlimit] are NOT 1156945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne // empty by construction. This special case in getSpans() explains the >= & <= tests 1157c1f44830809f0a8526855f13822702ea756214faGilles Debunne if ((mMetricAffectingSpanSpanSet.spanStarts[j] >= mStart + mlimit) || 1158c1f44830809f0a8526855f13822702ea756214faGilles Debunne (mMetricAffectingSpanSpanSet.spanEnds[j] <= mStart + i)) continue; 1159538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final MetricAffectingSpan span = mMetricAffectingSpanSpanSet.spans[j]; 1160945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne if (span instanceof ReplacementSpan) { 1161945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne replacement = (ReplacementSpan)span; 1162945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne } else { 1163945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne // We might have a replacement that uses the draw 1164945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne // state, otherwise measure state would suffice. 1165945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne span.updateDrawState(wp); 1166e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1167e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1168e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 1169945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne if (replacement != null) { 1170945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne x += handleReplacement(replacement, wp, i, mlimit, runIsRtl, c, x, top, y, 1171945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne bottom, fmi, needWidth || mlimit < measureLimit); 1172945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne continue; 1173945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne } 1174945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne 1175538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final TextPaint activePaint = mActivePaint; 1176538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader activePaint.set(mPaint); 1177538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader int activeStart = i; 1178538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader int activeEnd = mlimit; 11791378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final DecorationInfo decorationInfo = mDecorationInfo; 11801378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader mDecorations.clear(); 118142ef515d185d4fc038d602172789cc264f1d9960Raph Levien for (int j = i, jnext; j < mlimit; j = jnext) { 1182702c9f92fcb1fbdfdca07a2627d5f75dbca7b557Siyamed Sinir jnext = mCharacterStyleSpanSet.getNextTransition(mStart + j, mStart + inext) - 1183702c9f92fcb1fbdfdca07a2627d5f75dbca7b557Siyamed Sinir mStart; 118442ef515d185d4fc038d602172789cc264f1d9960Raph Levien 1185538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final int offset = Math.min(jnext, mlimit); 118642ef515d185d4fc038d602172789cc264f1d9960Raph Levien wp.set(mPaint); 118742ef515d185d4fc038d602172789cc264f1d9960Raph Levien for (int k = 0; k < mCharacterStyleSpanSet.numberOfSpans; k++) { 118842ef515d185d4fc038d602172789cc264f1d9960Raph Levien // Intentionally using >= and <= as explained above 1189702c9f92fcb1fbdfdca07a2627d5f75dbca7b557Siyamed Sinir if ((mCharacterStyleSpanSet.spanStarts[k] >= mStart + offset) || 1190702c9f92fcb1fbdfdca07a2627d5f75dbca7b557Siyamed Sinir (mCharacterStyleSpanSet.spanEnds[k] <= mStart + j)) continue; 11910c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt 1192538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader final CharacterStyle span = mCharacterStyleSpanSet.spans[k]; 1193702c9f92fcb1fbdfdca07a2627d5f75dbca7b557Siyamed Sinir span.updateDrawState(wp); 1194e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 119542ef515d185d4fc038d602172789cc264f1d9960Raph Levien 11961378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader extractDecorationInfo(wp, decorationInfo); 1197538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 1198538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader if (j == i) { 1199538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // First chunk of text. We can't handle it yet, since we may need to merge it 1200538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // with the next chunk. So we just save the TextPaint for future comparisons 1201538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // and use. 1202538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader activePaint.set(wp); 1203538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } else if (!wp.hasEqualAttributes(activePaint)) { 1204538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // The style of the present chunk of text is substantially different from the 1205538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // style of the previous chunk. We need to handle the active piece of text 1206538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // and restart with the present chunk. 1207538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader activePaint.setHyphenEdit(adjustHyphenEdit( 1208538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader activeStart, activeEnd, mPaint.getHyphenEdit())); 1209538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader x += handleText(activePaint, activeStart, activeEnd, i, inext, runIsRtl, c, x, 1210538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader top, y, bottom, fmi, needWidth || activeEnd < measureLimit, 12111378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader Math.min(activeEnd, mlimit), mDecorations); 1212538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader 1213538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader activeStart = j; 1214538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader activePaint.set(wp); 12151378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader mDecorations.clear(); 1216538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } else { 1217538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // The present TextPaint is substantially equal to the last TextPaint except 12181378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader // perhaps for decorations. We just need to expand the active piece of text to 1219538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // include the present chunk, which we always do anyway. We don't need to save 1220538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // wp to activePaint, since they are already equal. 1221538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 122246c6f4c5ea7846fee4e6ef40c035ef2bee1adcbbRoozbeh Pournader 1223538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader activeEnd = jnext; 12241378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader if (decorationInfo.hasDecoration()) { 12251378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader final DecorationInfo copy = decorationInfo.copyInfo(); 1226538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader copy.start = j; 1227538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader copy.end = jnext; 12281378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader mDecorations.add(copy); 1229538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader } 1230e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1231538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader // Handle the final piece of text. 1232538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader activePaint.setHyphenEdit(adjustHyphenEdit( 1233538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader activeStart, activeEnd, mPaint.getHyphenEdit())); 1234538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader x += handleText(activePaint, activeStart, activeEnd, i, inext, runIsRtl, c, x, 1235538de5bb3b3662c51c17cd9dd24e660c85e88b78Roozbeh Pournader top, y, bottom, fmi, needWidth || activeEnd < measureLimit, 12361378a9d72cb4a9f7a939f0a28a78fcfb87fb7879Roozbeh Pournader Math.min(activeEnd, mlimit), mDecorations); 1237e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1238e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 1239945ee9b1661e60e0074d4f16f61fc147c728c6bfGilles Debunne return x - originalX; 1240e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1241e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 1242e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 1243e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Render a text run with the set-up paint. 1244e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 1245e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param c the canvas 1246e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param wp the paint used to render the text 12470c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * @param start the start of the run 12480c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * @param end the end of the run 12490c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * @param contextStart the start of context for the run 12500c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt * @param contextEnd the end of the context for the run 1251da12f389eb4be0c08ca3fa9ca7663f4977858df5Fabrice Di Meglio * @param runIsRtl true if the run is right-to-left 1252e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param x the x position of the left edge of the run 1253e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param y the baseline of the run 1254e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 12550c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt private void drawTextRun(Canvas c, TextPaint wp, int start, int end, 1256da12f389eb4be0c08ca3fa9ca7663f4977858df5Fabrice Di Meglio int contextStart, int contextEnd, boolean runIsRtl, float x, int y) { 1257e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 1258e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt if (mCharsValid) { 12590c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int count = end - start; 12600c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int contextCount = contextEnd - contextStart; 12610c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt c.drawTextRun(mChars, start, count, contextStart, contextCount, 1262051910b9f998030dacb8a0722588cc715813fde1Raph Levien x, y, runIsRtl, wp); 1263e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } else { 12640c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt int delta = mStart; 12650c702b88c5d0d4380930b920f5be6e66dd95a0d8Doug Felt c.drawTextRun(mText, delta + start, delta + end, 1266051910b9f998030dacb8a0722588cc715813fde1Raph Levien delta + contextStart, delta + contextEnd, x, y, runIsRtl, wp); 1267e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1268e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1269e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 1270e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt /** 1271e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * Returns the next tab position. 1272e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * 1273e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @param h the (unsigned) offset from the leading margin 1274e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt * @return the (unsigned) tab position after this offset 1275e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt */ 1276e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt float nextTab(float h) { 1277c982f60e982c1d2df9f115ed9a5c3ef3643d0892Doug Felt if (mTabs != null) { 1278c982f60e982c1d2df9f115ed9a5c3ef3643d0892Doug Felt return mTabs.nextTab(h); 1279e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1280c982f60e982c1d2df9f115ed9a5c3ef3643d0892Doug Felt return TabStops.nextDefaultStop(h, TAB_INCREMENT); 1281e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt } 1282e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt 128309da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka private boolean isStretchableWhitespace(int ch) { 12843630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader // TODO: Support NBSP and other stretchable whitespace (b/34013491 and b/68204709). 12853630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader return ch == 0x0020; 128609da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka } 128709da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka 128809da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka /* Return the number of spaces in the text line, for the purpose of justification */ 128909da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka private int countStretchableSpaces(int start, int end) { 129009da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka int count = 0; 12913630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader for (int i = start; i < end; i++) { 12923630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader final char c = mCharsValid ? mChars[i] : mText.charAt(i + mStart); 12933630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader if (isStretchableWhitespace(c)) { 12943630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader count++; 12953630d0861bc703cef843d5c196726235d72f1e80Roozbeh Pournader } 129609da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka } 129709da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka return count; 129809da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka } 129909da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka 130009da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka // Note: keep this in sync with Minikin LineBreaker::isLineEndSpace() 130109da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka public static boolean isLineEndSpace(char ch) { 130209da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka return ch == ' ' || ch == '\t' || ch == 0x1680 130309da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka || (0x2000 <= ch && ch <= 0x200A && ch != 0x2007) 130409da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka || ch == 0x205F || ch == 0x3000; 130509da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka } 130609da71a6dcfe07e0efdc35933322fba16091f555Seigo Nonaka 1307e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt private static final int TAB_INCREMENT = 20; 1308e8e45f2c05cb3b6d23f30c8f96d8e0b3699cea7aDoug Felt} 1309