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Improve TextEllipsizer class
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65eb631711
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@ -33,7 +33,7 @@ public final class TextEllipsizer {
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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 caBeEllipsized = null;
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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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@ -45,6 +45,7 @@ public final class TextEllipsizer {
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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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@ -57,14 +58,14 @@ public final class TextEllipsizer {
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public void setContent(@NonNull final Description content) {
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this.content = content;
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caBeEllipsized = null;
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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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caBeEllipsized = view.getLineCount() > maxLines;
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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(caBeEllipsized);
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onContentChanged.accept(canBeEllipsized);
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}
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});
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}
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@ -135,7 +136,7 @@ public final class TextEllipsizer {
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}
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/**
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* Toggle the view between the ellipsed and expanded state.
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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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@ -146,16 +147,17 @@ public final class TextEllipsizer {
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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 {@link maxLines}
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* and thus can be shortened, {@code false} if the {@code content} fits into the {@link view}
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* without being shortened and {@code null} if the initialization is not completed yet.
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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 caBeEllipsized;
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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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@ -173,19 +175,15 @@ public final class TextEllipsizer {
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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.
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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(final Consumer<Boolean> listener) {
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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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public void removeStateChangeListener() {
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this.stateChangeListener = null;
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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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