| /* |
| * Copyright (C) 2015 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.internal.widget; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.text.BoringLayout; |
| import android.text.Layout; |
| import android.text.StaticLayout; |
| import android.text.TextUtils; |
| import android.text.method.TransformationMethod; |
| import android.util.AttributeSet; |
| import android.view.RemotableViewMethod; |
| import android.widget.RemoteViews; |
| import android.widget.TextView; |
| |
| import com.android.internal.R; |
| |
| /** |
| * A TextView that can float around an image on the end. |
| * |
| * @hide |
| */ |
| @RemoteViews.RemoteView |
| public class ImageFloatingTextView extends TextView { |
| |
| /** Number of lines from the top to indent */ |
| private int mIndentLines; |
| |
| /** Resolved layout direction */ |
| private int mResolvedDirection = LAYOUT_DIRECTION_UNDEFINED; |
| private int mMaxLinesForHeight = -1; |
| private boolean mFirstMeasure = true; |
| private int mLayoutMaxLines = -1; |
| private boolean mBlockLayouts; |
| |
| public ImageFloatingTextView(Context context) { |
| this(context, null); |
| } |
| |
| public ImageFloatingTextView(Context context, @Nullable AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public ImageFloatingTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public ImageFloatingTextView(Context context, AttributeSet attrs, int defStyleAttr, |
| int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| } |
| |
| @Override |
| protected Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth, |
| Layout.Alignment alignment, boolean shouldEllipsize, |
| TextUtils.TruncateAt effectiveEllipsize, boolean useSaved) { |
| TransformationMethod transformationMethod = getTransformationMethod(); |
| CharSequence text = getText(); |
| if (transformationMethod != null) { |
| text = transformationMethod.getTransformation(text, this); |
| } |
| text = text == null ? "" : text; |
| StaticLayout.Builder builder = StaticLayout.Builder.obtain(text, 0, text.length(), |
| getPaint(), wantWidth) |
| .setAlignment(alignment) |
| .setTextDirection(getTextDirectionHeuristic()) |
| .setLineSpacing(getLineSpacingExtra(), getLineSpacingMultiplier()) |
| .setIncludePad(getIncludeFontPadding()) |
| .setBreakStrategy(Layout.BREAK_STRATEGY_HIGH_QUALITY) |
| .setHyphenationFrequency(Layout.HYPHENATION_FREQUENCY_FULL); |
| int maxLines; |
| if (mMaxLinesForHeight > 0) { |
| maxLines = mMaxLinesForHeight; |
| } else { |
| maxLines = getMaxLines() >= 0 ? getMaxLines() : Integer.MAX_VALUE; |
| } |
| builder.setMaxLines(maxLines); |
| mLayoutMaxLines = maxLines; |
| if (shouldEllipsize) { |
| builder.setEllipsize(effectiveEllipsize) |
| .setEllipsizedWidth(ellipsisWidth); |
| } |
| |
| // we set the endmargin on the requested number of lines. |
| int endMargin = getContext().getResources().getDimensionPixelSize( |
| R.dimen.notification_content_picture_margin); |
| int[] margins = null; |
| if (mIndentLines > 0) { |
| margins = new int[mIndentLines + 1]; |
| for (int i = 0; i < mIndentLines; i++) { |
| margins[i] = endMargin; |
| } |
| } |
| if (mResolvedDirection == LAYOUT_DIRECTION_RTL) { |
| builder.setIndents(margins, null); |
| } else { |
| builder.setIndents(null, margins); |
| } |
| |
| return builder.build(); |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| int height = MeasureSpec.getSize(heightMeasureSpec); |
| // Lets calculate how many lines the given measurement allows us. |
| int availableHeight = height - mPaddingTop - mPaddingBottom; |
| int maxLines = availableHeight / getLineHeight(); |
| maxLines = Math.max(1, maxLines); |
| if (getMaxLines() > 0) { |
| maxLines = Math.min(getMaxLines(), maxLines); |
| } |
| if (maxLines != mMaxLinesForHeight) { |
| mMaxLinesForHeight = maxLines; |
| if (getLayout() != null && mMaxLinesForHeight != mLayoutMaxLines) { |
| // Invalidate layout. |
| mBlockLayouts = true; |
| setHint(getHint()); |
| mBlockLayouts = false; |
| } |
| } |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| } |
| |
| @Override |
| public void requestLayout() { |
| if (!mBlockLayouts) { |
| super.requestLayout(); |
| } |
| } |
| |
| @Override |
| public void onRtlPropertiesChanged(int layoutDirection) { |
| super.onRtlPropertiesChanged(layoutDirection); |
| |
| if (layoutDirection != mResolvedDirection && isLayoutDirectionResolved()) { |
| mResolvedDirection = layoutDirection; |
| if (mIndentLines > 0) { |
| // Invalidate layout. |
| setHint(getHint()); |
| } |
| } |
| } |
| |
| @RemotableViewMethod |
| public void setHasImage(boolean hasImage) { |
| setNumIndentLines(hasImage ? 2 : 0); |
| } |
| |
| /** |
| * @param lines the number of lines at the top that should be indented by indentEnd |
| * @return whether a change was made |
| */ |
| public boolean setNumIndentLines(int lines) { |
| if (mIndentLines != lines) { |
| mIndentLines = lines; |
| // Invalidate layout. |
| setHint(getHint()); |
| return true; |
| } |
| return false; |
| } |
| |
| public int getLayoutHeight() { |
| return getLayout().getHeight(); |
| } |
| } |