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Commit 8c64d188 by ibaker Committed by Oliver Woodman
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Add support for Cue and default text sizes in SubtitleWebView 

PiperOrigin-RevId: 309243467
parent 7ac024af
Inline Side-by-side
Showing with 57 additions and 31 deletions
library/ui/src/main/java/com/google/android/exoplayer2/ui/SubtitleTextView.java
......@@ -158,7 +158,8 @@ import java.util.List;
cue = repositionVerticalCue(cue);
}
float cueTextSizePx =
SubtitleViewUtils.resolveCueTextSize(cue, rawViewHeight, viewHeightMinusPadding);
SubtitleViewUtils.resolveTextSize(
cue.textSizeType, cue.textSize, rawViewHeight, viewHeightMinusPadding);
SubtitlePainter painter = painters.get(i);
painter.draw(
cue,
......
library/ui/src/main/java/com/google/android/exoplayer2/ui/SubtitleViewUtils.java
......@@ -21,20 +21,20 @@ import com.google.android.exoplayer2.text.Cue;
/** Utility class for subtitle layout logic. */
/* package */ final class SubtitleViewUtils {
public static float resolveCueTextSize(Cue cue, int rawViewHeight, int viewHeightMinusPadding) {
if (cue.textSizeType == Cue.TYPE_UNSET || cue.textSize == Cue.DIMEN_UNSET) {
return 0;
}
float defaultCueTextSizePx =
resolveTextSize(cue.textSizeType, cue.textSize, rawViewHeight, viewHeightMinusPadding);
return Math.max(defaultCueTextSizePx, 0);
}
/**
* Returns the text size in px, derived from {@code textSize} and {@code textSizeType}.
*
* <p>Returns {@link Cue#DIMEN_UNSET} if {@code textSize == Cue.DIMEN_UNSET} or {@code
* textSizeType == Cue.TYPE_UNSET}.
*/
public static float resolveTextSize(
@Cue.TextSizeType int textSizeType,
float textSize,
int rawViewHeight,
int viewHeightMinusPadding) {
if (textSize == Cue.DIMEN_UNSET) {
return Cue.DIMEN_UNSET;
}
switch (textSizeType) {
case Cue.TEXT_SIZE_TYPE_ABSOLUTE:
return textSize;
......
library/ui/src/main/java/com/google/android/exoplayer2/ui/SubtitleWebView.java
......@@ -24,6 +24,7 @@ import android.graphics.Color;
import android.text.Layout;
import android.util.AttributeSet;
import android.util.Base64;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.webkit.WebView;
import android.widget.FrameLayout;
......@@ -50,8 +51,8 @@ import java.util.List;
private final WebView webView;
private List<Cue> cues;
@Cue.TextSizeType private int textSizeType;
private float textSize;
@Cue.TextSizeType private int defaultTextSizeType;
private float defaultTextSize;
private boolean applyEmbeddedStyles;
private boolean applyEmbeddedFontSizes;
private CaptionStyleCompat style;
......@@ -64,8 +65,8 @@ import java.util.List;
public SubtitleWebView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
cues = Collections.emptyList();
textSizeType = Cue.TEXT_SIZE_TYPE_FRACTIONAL;
textSize = DEFAULT_TEXT_SIZE_FRACTION;
defaultTextSizeType = Cue.TEXT_SIZE_TYPE_FRACTIONAL;
defaultTextSize = DEFAULT_TEXT_SIZE_FRACTION;
applyEmbeddedStyles = true;
applyEmbeddedFontSizes = true;
style = CaptionStyleCompat.DEFAULT;
......@@ -99,11 +100,11 @@ import java.util.List;
@Override
public void setTextSize(@Cue.TextSizeType int textSizeType, float textSize) {
if (this.textSizeType == textSizeType && this.textSize == textSize) {
if (this.defaultTextSizeType == textSizeType && this.defaultTextSize == textSize) {
return;
}
this.textSizeType = textSizeType;
this.textSize = textSize;
this.defaultTextSizeType = textSizeType;
this.defaultTextSize = textSize;
updateWebView();
}
......@@ -147,17 +148,19 @@ import java.util.List;
private void updateWebView() {
StringBuilder html = new StringBuilder();
html.append("<html><body>")
.append("<div style=\"")
.append("-webkit-user-select:none;")
.append("position:fixed;")
.append("top:0;")
.append("bottom:0;")
.append("left:0;")
.append("right:0;")
.append("font-size:20px;")
.append("color:red;")
.append("\">");
html.append(
Util.formatInvariant(
"<html><body><div style=\""
+ "-webkit-user-select:none;"
+ "position:fixed;"
+ "top:0;"
+ "bottom:0;"
+ "left:0;"
+ "right:0;"
+ "font-size:%s;"
+ "color:red;"
+ "\">",
convertTextSizeToCss(defaultTextSizeType, defaultTextSize)));
for (int i = 0; i < cues.size(); i++) {
Cue cue = cues.get(i);
......@@ -198,8 +201,8 @@ import java.util.List;
: "fit-content";
String textAlign = convertAlignmentToCss(cue.textAlignment);
String writingMode = convertVerticalTypeToCss(cue.verticalType);
String cueTextSizeCssPx = convertTextSizeToCss(cue.textSizeType, cue.textSize);
String positionProperty;
String lineProperty;
......@@ -240,6 +243,7 @@ import java.util.List;
+ "%s:%s;"
+ "text-align:%s;"
+ "writing-mode:%s;"
+ "font-size:%s;"
+ "transform:translate(%s%%,%s%%);"
+ "\">",
positionProperty,
......@@ -250,6 +254,7 @@ import java.util.List;
size,
textAlign,
writingMode,
cueTextSizeCssPx,
horizontalTranslatePercent,
verticalTranslatePercent))
.append(SpannedToHtmlConverter.convert(cue.text))
......@@ -265,7 +270,27 @@ import java.util.List;
"base64");
}
private String convertVerticalTypeToCss(@Cue.VerticalType int verticalType) {
/**
* Converts a text size to a CSS px value.
*
* <p>First converts to Android px using {@link SubtitleViewUtils#resolveTextSize(int, float, int,
* int)}.
*
* <p>Then divides by {@link DisplayMetrics#density} to convert from Android px to dp because
* WebView treats one CSS px as one Android dp.
*/
private String convertTextSizeToCss(@Cue.TextSizeType int type, float size) {
float sizePx =
SubtitleViewUtils.resolveTextSize(
type, size, getHeight(), getHeight() - getPaddingTop() - getPaddingBottom());
if (sizePx == Cue.DIMEN_UNSET) {
return "unset";
}
float sizeDp = sizePx / getContext().getResources().getDisplayMetrics().density;
return Util.formatInvariant("%.2fpx", sizeDp);
}
private static String convertVerticalTypeToCss(@Cue.VerticalType int verticalType) {
switch (verticalType) {
case Cue.VERTICAL_TYPE_LR:
return "vertical-lr";
......@@ -277,7 +302,7 @@ import java.util.List;
}
}
private String convertAlignmentToCss(@Nullable Layout.Alignment alignment) {
private static String convertAlignmentToCss(@Nullable Layout.Alignment alignment) {
if (alignment == null) {
return "unset";
}
......
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