Android/frameworks_base
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Merge "Make getText hidden and getWidth/getBounds public" into pi-dev

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This commit is contained in:
Seigo Nonaka
2018-04-03 15:54:49 +00:00
committed by Android (Google) Code Review
parent a583d12f3d 151108a2c6
commit 3a2d4143ee
2 changed files with 52 additions and 11 deletions
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3
api/current.txt
View File

@@ -43376,6 +43376,7 @@ package android.text {
public class PrecomputedText implements android.text.Spannable {
method public char charAt(int);
method public static android.text.PrecomputedText create(java.lang.CharSequence, android.text.PrecomputedText.Params);
method public void getBounds(int, int, android.graphics.Rect);
method public int getParagraphCount();
method public int getParagraphEnd(int);
method public int getParagraphStart(int);
@@ -43384,7 +43385,7 @@ package android.text {
method public int getSpanFlags(java.lang.Object);
method public int getSpanStart(java.lang.Object);
method public <T> T[] getSpans(int, int, java.lang.Class<T>);
method public java.lang.CharSequence getText();
method public float getWidth(int, int);
method public int length();
method public int nextSpanTransition(int, int, java.lang.Class);
method public void removeSpan(java.lang.Object);

60
core/java/android/text/PrecomputedText.java
View File

@@ -16,6 +16,7 @@
package android.text;
import android.annotation.FloatRange;
import android.annotation.IntRange;
import android.annotation.NonNull;
import android.annotation.Nullable;
@@ -44,13 +45,17 @@ import java.util.Objects;
* <pre>
* An example usage is:
* <code>
* void asyncSetText(final TextView textView, final String longString, Handler bgThreadHandler) {
* static void asyncSetText(TextView textView, final String longString, Executor bgExecutor) {
* // construct precompute related parameters using the TextView that we will set the text on.
* final PrecomputedText.Params params = textView.getTextParams();
* bgThreadHandler.post(() -> {
* final PrecomputedText precomputedText =
* PrecomputedText.create(expensiveLongString, params);
* final PrecomputedText.Params params = textView.getTextMetricsParams();
* final Reference textViewRef = new WeakReference<>(textView);
* bgExecutor.submit(() -> {
* TextView textView = textViewRef.get();
* if (textView == null) return;
* final PrecomputedText precomputedText = PrecomputedText.create(longString, params);
* textView.post(() -> {
* TextView textView = textViewRef.get();
* if (textView == null) return;
* textView.setText(precomputedText);
* });
* });
@@ -363,6 +368,7 @@ public class PrecomputedText implements Spannable {
/**
* Return the underlying text.
* @hide
*/
public @NonNull CharSequence getText() {
return mText;
@@ -451,27 +457,61 @@ public class PrecomputedText implements Spannable {
+ ", gave " + pos);
}
/** @hide */
public float getWidth(@IntRange(from = 0) int start, @IntRange(from = 0) int end) {
/**
* Returns text width for the given range.
* Both {@code start} and {@code end} offset need to be in the same paragraph, otherwise
* IllegalArgumentException will be thrown.
*
* @param start the inclusive start offset in the text
* @param end the exclusive end offset in the text
* @return the text width
* @throws IllegalArgumentException if start and end offset are in the different paragraph.
*/
public @FloatRange(from = 0) float getWidth(@IntRange(from = 0) int start,
@IntRange(from = 0) int end) {
Preconditions.checkArgument(0 <= start && start <= mText.length(), "invalid start offset");
Preconditions.checkArgument(0 <= end && end <= mText.length(), "invalid end offset");
Preconditions.checkArgument(start <= end, "start offset can not be larger than end offset");
if (start == end) {
return 0;
}
final int paraIndex = findParaIndex(start);
final int paraStart = getParagraphStart(paraIndex);
final int paraEnd = getParagraphEnd(paraIndex);
if (start < paraStart || paraEnd < end) {
throw new RuntimeException("Cannot measured across the paragraph:"
throw new IllegalArgumentException("Cannot measured across the paragraph:"
+ "para: (" + paraStart + ", " + paraEnd + "), "
+ "request: (" + start + ", " + end + ")");
}
return getMeasuredParagraph(paraIndex).getWidth(start - paraStart, end - paraStart);
}
/** @hide */
/**
* Retrieves the text bounding box for the given range.
* Both {@code start} and {@code end} offset need to be in the same paragraph, otherwise
* IllegalArgumentException will be thrown.
*
* @param start the inclusive start offset in the text
* @param end the exclusive end offset in the text
* @param bounds the output rectangle
* @throws IllegalArgumentException if start and end offset are in the different paragraph.
*/
public void getBounds(@IntRange(from = 0) int start, @IntRange(from = 0) int end,
@NonNull Rect bounds) {
Preconditions.checkArgument(0 <= start && start <= mText.length(), "invalid start offset");
Preconditions.checkArgument(0 <= end && end <= mText.length(), "invalid end offset");
Preconditions.checkArgument(start <= end, "start offset can not be larger than end offset");
Preconditions.checkNotNull(bounds);
if (start == end) {
bounds.set(0, 0, 0, 0);
return;
}
final int paraIndex = findParaIndex(start);
final int paraStart = getParagraphStart(paraIndex);
final int paraEnd = getParagraphEnd(paraIndex);
if (start < paraStart || paraEnd < end) {
throw new RuntimeException("Cannot measured across the paragraph:"
throw new IllegalArgumentException("Cannot measured across the paragraph:"
+ "para: (" + paraStart + ", " + paraEnd + "), "
+ "request: (" + start + ", " + end + ")");
}