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https://github.com/TeamNewPipe/NewPipe
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Remove TextEllipsizer
This commit is contained in:
Isira Seneviratne
parent
82e5b6b1e9
commit
d7de38c79c
@ -1,193 +0,0 @@
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package org.schabi.newpipe.util.text;
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import android.graphics.Paint;
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import android.text.Layout;
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import android.view.View;
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import android.widget.TextView;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.core.text.HtmlCompat;
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import org.schabi.newpipe.extractor.StreamingService;
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import org.schabi.newpipe.extractor.stream.Description;
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import java.util.function.Consumer;
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import io.reactivex.rxjava3.disposables.CompositeDisposable;
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/**
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* <p>Class to ellipsize text inside a {@link TextView}.</p>
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* This class provides all utils to automatically ellipsize and expand a text
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*/
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public final class TextEllipsizer {
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private static final int EXPANDED_LINES = Integer.MAX_VALUE;
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private static final String ELLIPSIS = "…";
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@NonNull private final CompositeDisposable disposable = new CompositeDisposable();
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@NonNull private final TextView view;
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private final int maxLines;
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@NonNull private Description content;
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@Nullable private StreamingService streamingService;
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@Nullable private String streamUrl;
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private boolean isEllipsized = false;
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@Nullable private Boolean canBeEllipsized = null;
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@NonNull private final Paint paintAtContentSize = new Paint();
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private final float ellipsisWidthPx;
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@Nullable private Consumer<Boolean> stateChangeListener = null;
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@Nullable private Consumer<Boolean> onContentChanged;
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public TextEllipsizer(@NonNull final TextView view,
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final int maxLines,
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@Nullable final StreamingService streamingService) {
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this.view = view;
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this.maxLines = maxLines;
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this.content = Description.EMPTY_DESCRIPTION;
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this.streamingService = streamingService;
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paintAtContentSize.setTextSize(view.getTextSize());
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ellipsisWidthPx = paintAtContentSize.measureText(ELLIPSIS);
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}
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public void setOnContentChanged(@Nullable final Consumer<Boolean> onContentChanged) {
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this.onContentChanged = onContentChanged;
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}
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public void setContent(@NonNull final Description content) {
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this.content = content;
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canBeEllipsized = null;
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linkifyContentView(v -> {
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final int currentMaxLines = view.getMaxLines();
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view.setMaxLines(EXPANDED_LINES);
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canBeEllipsized = view.getLineCount() > maxLines;
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view.setMaxLines(currentMaxLines);
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if (onContentChanged != null) {
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onContentChanged.accept(canBeEllipsized);
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}
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});
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}
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public void setStreamUrl(@Nullable final String streamUrl) {
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this.streamUrl = streamUrl;
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}
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public void setStreamingService(@NonNull final StreamingService streamingService) {
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this.streamingService = streamingService;
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}
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/**
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* Expand the {@link TextEllipsizer#content} to its full length.
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*/
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public void expand() {
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view.setMaxLines(EXPANDED_LINES);
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linkifyContentView(v -> isEllipsized = false);
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}
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/**
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* Shorten the {@link TextEllipsizer#content} to the given number of
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* {@link TextEllipsizer#maxLines maximum lines} and add trailing '{@code …}'
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* if the text was shorted.
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*/
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public void ellipsize() {
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// expand text to see whether it is necessary to ellipsize the text
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view.setMaxLines(EXPANDED_LINES);
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linkifyContentView(v -> {
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final CharSequence charSeqText = view.getText();
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if (charSeqText != null && view.getLineCount() > maxLines) {
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// Note that converting to String removes spans (i.e. links), but that's something
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// we actually want since when the text is ellipsized we want all clicks on the
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// comment to expand the comment, not to open links.
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final String text = charSeqText.toString();
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final Layout layout = view.getLayout();
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final float lineWidth = layout.getLineWidth(maxLines - 1);
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final float layoutWidth = layout.getWidth();
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final int lineStart = layout.getLineStart(maxLines - 1);
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final int lineEnd = layout.getLineEnd(maxLines - 1);
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// remove characters up until there is enough space for the ellipsis
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// (also summing 2 more pixels, just to be sure to avoid float rounding errors)
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int end = lineEnd;
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float removedCharactersWidth = 0.0f;
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while (lineWidth - removedCharactersWidth + ellipsisWidthPx + 2.0f > layoutWidth
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&& end >= lineStart) {
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end -= 1;
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// recalculate each time to account for ligatures or other similar things
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removedCharactersWidth = paintAtContentSize.measureText(
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text.substring(end, lineEnd));
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}
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// remove trailing spaces and newlines
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while (end > 0 && Character.isWhitespace(text.charAt(end - 1))) {
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end -= 1;
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}
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final String newVal = text.substring(0, end) + ELLIPSIS;
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view.setText(newVal);
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isEllipsized = true;
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} else {
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isEllipsized = false;
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}
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view.setMaxLines(maxLines);
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});
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}
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/**
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* Toggle the view between the ellipsized and expanded state.
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*/
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public void toggle() {
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if (isEllipsized) {
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expand();
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} else {
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ellipsize();
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}
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}
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/**
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* Whether the {@link #view} can be ellipsized.
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* This is only the case when the {@link #content} has more lines
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* than allowed via {@link #maxLines}.
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* @return {@code true} if the {@link #content} has more lines than allowed via
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* {@link #maxLines} and thus can be shortened, {@code false} if the {@code content} fits into
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* the {@link #view} without being shortened and {@code null} if the initialization is not
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* completed yet.
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*/
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@Nullable
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public Boolean canBeEllipsized() {
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return canBeEllipsized;
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}
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private void linkifyContentView(final Consumer<View> consumer) {
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final boolean oldState = isEllipsized;
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disposable.clear();
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TextLinkifier.fromDescription(view, content,
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HtmlCompat.FROM_HTML_MODE_LEGACY, streamingService, streamUrl, disposable,
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v -> {
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consumer.accept(v);
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notifyStateChangeListener(oldState);
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});
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}
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/**
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* Add a listener which is called when the given content is changed,
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* either from <em>ellipsized</em> to <em>full</em> or vice versa.
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* @param listener The listener to be called, or {@code null} to remove it.
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* The Boolean parameter is the new state.
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* <em>Ellipsized</em> content is represented as {@code true},
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* normal or <em>full</em> content by {@code false}.
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*/
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public void setStateChangeListener(@Nullable final Consumer<Boolean> listener) {
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this.stateChangeListener = listener;
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}
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private void notifyStateChangeListener(final boolean oldState) {
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if (oldState != isEllipsized && stateChangeListener != null) {
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stateChangeListener.accept(isEllipsized);
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}
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}
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}
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