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The source code is released under:
Apache License
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/* * Copyright (C) 2013 UNCOPT LLC.// w w w.j a v a 2 s.c om * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.uncopt.android.widget.text.justify; import android.content.Context; import android.graphics.Typeface; import android.text.Layout; import android.text.method.LinkMovementMethod; import android.util.AttributeSet; import android.widget.TextView; /** * A TextView with justified text.<br> * The TextView has a ScrollingMovementMethod by default. You can change the MovementMethod, * but you should not set it to null. */ public class JustifiedTextView extends TextView implements Justify.Justified { @SuppressWarnings("unused") public JustifiedTextView(final @NotNull Context context) { super(context); super.setMovementMethod(new LinkMovementMethod()); } @SuppressWarnings("unused") public JustifiedTextView(final @NotNull Context context, final AttributeSet attrs) { super(context, attrs); if (getMovementMethod() == null) super.setMovementMethod(new LinkMovementMethod()); } @SuppressWarnings("unused") public JustifiedTextView(final @NotNull Context context, final AttributeSet attrs, final int defStyle) { super(context, attrs, defStyle); if (getMovementMethod() == null) super.setMovementMethod(new LinkMovementMethod()); } @Override protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); // Make sure we don't call setupScaleSpans again if the measure was triggered // by setupScaleSpans itself. if (!mMeasuring) { final Typeface typeface = getTypeface(); final float textSize = getTextSize(); final float textScaleX = getTextScaleX(); final boolean fakeBold = getPaint().isFakeBoldText(); if (mTypeface != typeface || mTextSize != textSize || mTextScaleX != textScaleX || mFakeBold != fakeBold) { final int width = MeasureSpec.getSize(widthMeasureSpec); if (width > 0 && width != mWidth) { mTypeface = typeface; mTextSize = textSize; mTextScaleX = textScaleX; mFakeBold = fakeBold; mWidth = width; mMeasuring = true; try { // Setup ScaleXSpans on whitespaces to justify the text. Justify.setupScaleSpans(this, mSpanStarts, mSpanEnds, mSpans); } finally { mMeasuring = false; } } } } } @Override protected void onTextChanged(final CharSequence text, final int start, final int lengthBefore, final int lengthAfter) { super.onTextChanged(text, start, lengthBefore, lengthAfter); final Layout layout = getLayout(); if (layout != null) { Justify.setupScaleSpans(this, mSpanStarts, mSpanEnds, mSpans); } } @Override @NotNull public TextView getTextView() { return this; } @Override public float getMaxProportion() { return Justify.DEFAULT_MAX_PROPORTION; } private static final int MAX_SPANS = 512; private boolean mMeasuring = false; private Typeface mTypeface = null; private float mTextSize = 0f; private float mTextScaleX = 0f; private boolean mFakeBold = false; private int mWidth = 0; private int[] mSpanStarts = new int[MAX_SPANS]; private int[] mSpanEnds = new int[MAX_SPANS]; private Justify.ScaleSpan[] mSpans = new Justify.ScaleSpan[MAX_SPANS]; }