Example usage for android.text Layout getSelectionPath

Introduction

In this page you can find the example usage for android.text Layout getSelectionPath.

Prototype

public void getSelectionPath(int start, int end, Path dest) 

Source Link

Document

Fills in the specified Path with a representation of a highlight between the specified offsets.

Usage

From source file:com.facebook.litho.widget.TextSpec.java

@GetExtraAccessibilityNodeAt
static int getExtraAccessibilityNodeAt(int x, int y, @Prop(resType = STRING) CharSequence text,
        @FromBoundsDefined Layout textLayout, @FromBoundsDefined ClickableSpan[] clickableSpans) {
    final Spanned spanned = (Spanned) text;

    for (int i = 0; i < clickableSpans.length; i++) {
        final ClickableSpan span = clickableSpans[i];
        final int start = spanned.getSpanStart(span);
        final int end = spanned.getSpanEnd(span);

        textLayout.getSelectionPath(start, end, sTempPath);
        sTempPath.computeBounds(sTempRectF, /* unused */true);

        if (sTempRectF.contains(x, y)) {
            return i;
        }/* ww w . j  ava 2 s. c o  m*/
    }

    return INVALID_ID;
}

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From source file:com.facebook.litho.widget.TextSpec.java

@OnPopulateExtraAccessibilityNode
static void onPopulateExtraAccessibilityNode(AccessibilityNodeInfoCompat node, int extraNodeIndex,
        int componentBoundsLeft, int componentBoundsTop, @Prop(resType = STRING) CharSequence text,
        @FromBoundsDefined Layout textLayout, @FromBoundsDefined ClickableSpan[] clickableSpans) {
    final Spanned spanned = (Spanned) text;

    final ClickableSpan span = clickableSpans[extraNodeIndex];
    final int start = spanned.getSpanStart(span);
    final int end = spanned.getSpanEnd(span);
    final int startLine = textLayout.getLineForOffset(start);
    final int endLine = textLayout.getLineForOffset(end);

    // The bounds for multi-line strings should *only* include the first line.  This is because
    // Talkback triggers its click at the center point of these bounds, and if that center point
    // is outside the spannable, it will click on something else.  There is no harm in not outlining
    // the wrapped part of the string, as the text for the whole string will be read regardless of
    // the bounding box.
    final int selectionPathEnd = startLine == endLine ? end : textLayout.getLineVisibleEnd(startLine);

    textLayout.getSelectionPath(start, selectionPathEnd, sTempPath);
    sTempPath.computeBounds(sTempRectF, /* unused */true);

    sTempRect.set(componentBoundsLeft + (int) sTempRectF.left, componentBoundsTop + (int) sTempRectF.top,
            componentBoundsLeft + (int) sTempRectF.right, componentBoundsTop + (int) sTempRectF.bottom);

    if (sTempRect.isEmpty()) {
        // Text is not actually visible.
        // Override bounds so it doesn't crash ExploreByTouchHelper.java
        sTempRect.set(0, 0, 1, 1);/*from  ww  w  . j av a  2s  .  c  o m*/
        node.setBoundsInParent(sTempRect);
        node.setContentDescription(""); // make node non-focusable
        return;
    }

    node.setBoundsInParent(sTempRect);

    node.setClickable(true);
    node.setFocusable(true);
    node.setEnabled(true);
    node.setVisibleToUser(true);
    if (span instanceof AccessibleClickableSpan) {
        node.setText(((AccessibleClickableSpan) span).getAccessibilityDescription());
    } else {
        node.setText(spanned.subSequence(start, end));
    }
}

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