19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.text.style; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.Paint; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.TextPaint; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The classes that affect character-level text formatting in a way that 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * changes the width or height of characters extend this class. 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic abstract class MetricAffectingSpan 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectextends CharacterStyle 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimplements UpdateLayout { 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public abstract void updateMeasureState(TextPaint p); 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns "this" for most MetricAffectingSpans, but for 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * MetricAffectingSpans that were generated by {@link #wrap}, 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * returns the underlying MetricAffectingSpan. 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public MetricAffectingSpan getUnderlying() { 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return this; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A Passthrough MetricAffectingSpan is one that 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * passes {@link #updateDrawState} and {@link #updateMeasureState} 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * calls through to the specified MetricAffectingSpan 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * while still being a distinct object, 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and is therefore able to be attached to the same Spannable 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to which the specified MetricAffectingSpan is already attached. 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* package */ static class Passthrough extends MetricAffectingSpan { 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private MetricAffectingSpan mStyle; 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new Passthrough of the specfied MetricAffectingSpan. 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public Passthrough(MetricAffectingSpan cs) { 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStyle = cs; 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Passes updateDrawState through to the underlying MetricAffectingSpan. 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void updateDrawState(TextPaint tp) { 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStyle.updateDrawState(tp); 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Passes updateMeasureState through to the underlying MetricAffectingSpan. 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void updateMeasureState(TextPaint tp) { 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStyle.updateMeasureState(tp); 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the MetricAffectingSpan underlying this one, or the one 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * underlying it if it too is a Passthrough. 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public MetricAffectingSpan getUnderlying() { 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mStyle.getUnderlying(); 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 86