Merge "Move caption view from Settings into framework" into klp-dev
This commit is contained in:
Alan Viverette
committed by
Android (Google) Code Review
Android (Google) Code Review
commit
a052d5a772
365
core/java/com/android/internal/widget/SubtitleView.java
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365
core/java/com/android/internal/widget/SubtitleView.java
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/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.internal.widget;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.content.res.Resources.Theme;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Paint;
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import android.graphics.Paint.Join;
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import android.graphics.Paint.Style;
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import android.graphics.RectF;
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import android.graphics.Typeface;
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import android.text.Layout.Alignment;
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import android.text.StaticLayout;
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import android.text.TextPaint;
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import android.text.TextUtils;
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import android.util.AttributeSet;
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import android.util.DisplayMetrics;
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import android.util.TypedValue;
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import android.view.View;
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import android.view.accessibility.CaptioningManager.CaptionStyle;
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public class SubtitleView extends View {
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// Ratio of inner padding to font size.
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private static final float INNER_PADDING_RATIO = 0.125f;
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// Styled dimensions.
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private final float mCornerRadius;
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private final float mOutlineWidth;
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private final float mShadowRadius;
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private final float mShadowOffsetX;
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private final float mShadowOffsetY;
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/** Temporary rectangle used for computing line bounds. */
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private final RectF mLineBounds = new RectF();
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/** Temporary array used for computing line wrapping. */
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private float[] mTextWidths;
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/** Reusable string builder used for holding text. */
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private final StringBuilder mText = new StringBuilder();
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private final StringBuilder mBreakText = new StringBuilder();
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private TextPaint mPaint;
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private int mForegroundColor;
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private int mBackgroundColor;
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private int mEdgeColor;
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private int mEdgeType;
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private boolean mHasMeasurements;
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private int mLastMeasuredWidth;
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private StaticLayout mLayout;
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private float mSpacingMult = 1;
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private float mSpacingAdd = 0;
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private int mInnerPaddingX = 0;
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public SubtitleView(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public SubtitleView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs);
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final Theme theme = context.getTheme();
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final TypedArray a = theme.obtainStyledAttributes(
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attrs, android.R.styleable.TextView, defStyle, 0);
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CharSequence text = "";
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int textSize = 15;
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final int n = a.getIndexCount();
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for (int i = 0; i < n; i++) {
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int attr = a.getIndex(i);
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switch (attr) {
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case android.R.styleable.TextView_text:
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text = a.getText(attr);
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break;
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case android.R.styleable.TextView_lineSpacingExtra:
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mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
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break;
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case android.R.styleable.TextView_lineSpacingMultiplier:
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mSpacingMult = a.getFloat(attr, mSpacingMult);
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break;
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case android.R.styleable.TextAppearance_textSize:
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textSize = a.getDimensionPixelSize(attr, textSize);
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break;
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}
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}
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// Set up density-dependent properties.
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// TODO: Move these to a default style.
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final Resources res = getContext().getResources();
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final DisplayMetrics m = res.getDisplayMetrics();
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mCornerRadius = res.getDimension(com.android.internal.R.dimen.subtitle_corner_radius);
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mOutlineWidth = res.getDimension(com.android.internal.R.dimen.subtitle_outline_width);
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mShadowRadius = res.getDimension(com.android.internal.R.dimen.subtitle_shadow_radius);
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mShadowOffsetX = res.getDimension(com.android.internal.R.dimen.subtitle_shadow_offset);
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mShadowOffsetY = mShadowOffsetX;
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final TextPaint paint = new TextPaint();
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paint.setAntiAlias(true);
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paint.setSubpixelText(true);
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mPaint = paint;
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setText(text);
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setTextSize(textSize);
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}
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public void setText(int resId) {
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final CharSequence text = getContext().getText(resId);
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setText(text);
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}
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public void setText(CharSequence text) {
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mText.setLength(0);
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mText.append(text);
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mHasMeasurements = false;
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requestLayout();
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}
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public void setForegroundColor(int color) {
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mForegroundColor = color;
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invalidate();
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}
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@Override
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public void setBackgroundColor(int color) {
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mBackgroundColor = color;
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invalidate();
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}
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public void setEdgeType(int edgeType) {
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mEdgeType = edgeType;
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invalidate();
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}
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public void setEdgeColor(int color) {
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mEdgeColor = color;
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invalidate();
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}
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public void setTextSize(float size) {
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final DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
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final float pixels = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, size, metrics);
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if (mPaint.getTextSize() != size) {
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mHasMeasurements = false;
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mInnerPaddingX = (int) (size * INNER_PADDING_RATIO + 0.5f);
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mPaint.setTextSize(size);
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requestLayout();
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}
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}
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public void setTypeface(Typeface typeface) {
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if (mPaint.getTypeface() != typeface) {
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mHasMeasurements = false;
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mPaint.setTypeface(typeface);
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requestLayout();
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}
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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final int widthSpec = MeasureSpec.getSize(widthMeasureSpec);
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if (computeMeasurements(widthSpec)) {
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final StaticLayout layout = mLayout;
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// Account for padding.
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final int paddingX = mPaddingLeft + mPaddingRight + mInnerPaddingX * 2;
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final int width = layout.getWidth() + paddingX;
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final int height = layout.getHeight() + mPaddingTop + mPaddingBottom;
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setMeasuredDimension(width, height);
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} else {
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setMeasuredDimension(MEASURED_STATE_TOO_SMALL, MEASURED_STATE_TOO_SMALL);
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}
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}
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@Override
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public void onLayout(boolean changed, int l, int t, int r, int b) {
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final int width = r - l;
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computeMeasurements(width);
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}
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private boolean computeMeasurements(int maxWidth) {
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if (mHasMeasurements && maxWidth == mLastMeasuredWidth) {
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return true;
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}
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// Account for padding.
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final int paddingX = mPaddingLeft + mPaddingRight + mInnerPaddingX;
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maxWidth -= paddingX;
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if (maxWidth <= 0) {
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return false;
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}
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final TextPaint paint = mPaint;
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final CharSequence text = mText;
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final int textLength = text.length();
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if (mTextWidths == null || mTextWidths.length < textLength) {
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mTextWidths = new float[textLength];
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}
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final float[] textWidths = mTextWidths;
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paint.getTextWidths(text, 0, textLength, textWidths);
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// Compute total length.
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float runLength = 0;
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for (int i = 0; i < textLength; i++) {
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runLength += textWidths[i];
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}
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final int lineCount = (int) (runLength / maxWidth) + 1;
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final int lineLength = (int) (runLength / lineCount);
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// Build line break buffer.
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final StringBuilder breakText = mBreakText;
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breakText.setLength(0);
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int line = 0;
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int lastBreak = 0;
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int maxRunLength = 0;
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runLength = 0;
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for (int i = 0; i < textLength; i++) {
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if (runLength > lineLength) {
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final CharSequence sequence = text.subSequence(lastBreak, i);
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final int trimmedLength = TextUtils.getTrimmedLength(sequence);
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breakText.append(sequence, 0, trimmedLength);
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breakText.append('\n');
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lastBreak = i;
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runLength = 0;
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}
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runLength += textWidths[i];
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if (runLength > maxRunLength) {
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maxRunLength = (int) Math.ceil(runLength);
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}
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}
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breakText.append(text.subSequence(lastBreak, textLength));
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mHasMeasurements = true;
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mLastMeasuredWidth = maxWidth;
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mLayout = new StaticLayout(breakText, paint, maxRunLength, Alignment.ALIGN_LEFT,
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mSpacingMult, mSpacingAdd, true);
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return true;
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}
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public void setStyle(int styleId) {
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final Context context = mContext;
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final ContentResolver cr = context.getContentResolver();
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final CaptionStyle style;
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if (styleId == CaptionStyle.PRESET_CUSTOM) {
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style = CaptionStyle.getCustomStyle(cr);
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} else {
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style = CaptionStyle.PRESETS[styleId];
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}
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mForegroundColor = style.foregroundColor;
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mBackgroundColor = style.backgroundColor;
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mEdgeType = style.edgeType;
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mEdgeColor = style.edgeColor;
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mHasMeasurements = false;
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final Typeface typeface = style.getTypeface();
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setTypeface(typeface);
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requestLayout();
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}
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@Override
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protected void onDraw(Canvas c) {
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final StaticLayout layout = mLayout;
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if (layout == null) {
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return;
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}
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final int saveCount = c.save();
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final int innerPaddingX = mInnerPaddingX;
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c.translate(mPaddingLeft + innerPaddingX, mPaddingTop);
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final RectF bounds = mLineBounds;
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final int lineCount = layout.getLineCount();
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final Paint paint = layout.getPaint();
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paint.setShadowLayer(0, 0, 0, 0);
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final int backgroundColor = mBackgroundColor;
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if (Color.alpha(backgroundColor) > 0) {
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paint.setColor(backgroundColor);
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paint.setStyle(Style.FILL);
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final float cornerRadius = mCornerRadius;
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float previousBottom = layout.getLineTop(0);
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for (int i = 0; i < lineCount; i++) {
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bounds.left = layout.getLineLeft(i) - innerPaddingX;
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bounds.right = layout.getLineRight(i) + innerPaddingX;
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bounds.top = previousBottom;
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bounds.bottom = layout.getLineBottom(i);
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previousBottom = bounds.bottom;
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c.drawRoundRect(bounds, cornerRadius, cornerRadius, paint);
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}
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}
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final int edgeType = mEdgeType;
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if (edgeType == CaptionStyle.EDGE_TYPE_OUTLINE) {
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paint.setColor(mEdgeColor);
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paint.setStyle(Style.FILL_AND_STROKE);
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paint.setStrokeJoin(Join.ROUND);
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paint.setStrokeWidth(mOutlineWidth);
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for (int i = 0; i < lineCount; i++) {
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layout.drawText(c, i, i);
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}
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}
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if (edgeType == CaptionStyle.EDGE_TYPE_DROP_SHADOW) {
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paint.setShadowLayer(mShadowRadius, mShadowOffsetX, mShadowOffsetY, mEdgeColor);
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}
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paint.setColor(mForegroundColor);
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paint.setStyle(Style.FILL);
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for (int i = 0; i < lineCount; i++) {
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layout.drawText(c, i, i);
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}
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c.restoreToCount(saveCount);
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}
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}
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@@ -344,4 +344,16 @@
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security mode. -->
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<dimen name="kg_small_widget_height">160dp</dimen>
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<!-- Rounded corner radius for video subtitles. -->
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<dimen name="subtitle_corner_radius">2dp</dimen>
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<!-- Shadow radius for video subtitles. -->
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<dimen name="subtitle_shadow_radius">2dp</dimen>
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<!-- Shadow offset for video subtitles. -->
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<dimen name="subtitle_shadow_offset">2dp</dimen>
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<!-- Outline width for video subtitles. -->
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<dimen name="subtitle_outline_width">2dp</dimen>
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</resources>
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@@ -1661,4 +1661,9 @@
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<java-symbol type="attr" name="actionModeWebSearchDrawable" />
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<java-symbol type="string" name="websearch" />
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<!-- From SubtitleView -->
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<java-symbol type="dimen" name="subtitle_corner_radius" />
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<java-symbol type="dimen" name="subtitle_shadow_radius" />
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<java-symbol type="dimen" name="subtitle_shadow_offset" />
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<java-symbol type="dimen" name="subtitle_outline_width" />
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</resources>
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Block a user