| /* |
| * Copyright (C) 2013 Google Inc. |
| * Licensed to The Android Open Source Project. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.mail.ui; |
| |
| import android.content.Context; |
| import android.text.Layout; |
| import android.text.SpannableStringBuilder; |
| import android.text.TextUtils; |
| import android.util.AttributeSet; |
| import android.widget.TextView; |
| |
| /** |
| * A special MultiLine TextView that will apply ellipsize logic to only the last |
| * line of text, such that the last line may be shorter than any previous lines. |
| */ |
| public class EllipsizedMultilineTextView extends TextView { |
| |
| public static final int ALL_AVAILABLE = -1; |
| private int mMaxLines; |
| private int mLastWSpec; |
| private int mLastHSpec; |
| |
| public EllipsizedMultilineTextView(Context context) { |
| this(context, null); |
| } |
| |
| public EllipsizedMultilineTextView(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| @Override |
| public void setMaxLines(int maxlines) { |
| super.setMaxLines(maxlines); |
| mMaxLines = maxlines; |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| |
| mLastWSpec = widthMeasureSpec; |
| mLastHSpec = heightMeasureSpec; |
| } |
| |
| /** |
| * Ellipsize just the last line of text in this view and set the text to the |
| * new ellipsized value. |
| * @param text Text to set and ellipsize |
| * @param avail available width in pixels for the last line |
| * @param paint Paint that has the proper properties set to measure the text |
| * for this view |
| * @return the {@link CharSequence} that was set on the {@link TextView} |
| */ |
| public CharSequence setText(final CharSequence text, int avail) { |
| if (text == null || text.length() == 0) { |
| return text; |
| } |
| |
| setEllipsize(null); |
| setText(text, TextView.BufferType.SPANNABLE); |
| |
| if (avail == ALL_AVAILABLE) { |
| return text; |
| } |
| Layout layout = getLayout(); |
| |
| if (layout == null) { |
| measure(mLastWSpec, mLastHSpec); |
| layout = getLayout(); |
| } |
| |
| if (layout == null) { |
| // Bail |
| return text; |
| } |
| |
| CharSequence remainder; |
| SpannableStringBuilder builder = new SpannableStringBuilder(); |
| int lineCount = layout.getLineCount(); |
| if (lineCount <= mMaxLines) { |
| remainder = null; |
| } else { |
| remainder = TextUtils.ellipsize( |
| text.subSequence(layout.getLineStart(mMaxLines - 1), text.length()), |
| getPaint(), avail, TextUtils.TruncateAt.END); |
| } |
| |
| builder.append(text, 0, layout.getLineStart(mMaxLines - 1)); |
| if (!TextUtils.isEmpty(remainder)) { |
| builder.append(remainder); |
| } |
| setText(builder, TextView.BufferType.SPANNABLE); |
| |
| return builder; |
| } |
| } |