57 lines
2.2 KiB
Kotlin
57 lines
2.2 KiB
Kotlin
package org.thoughtcrime.securesms.conversation.v2.utilities
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import android.graphics.Rect
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import android.text.Layout
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import android.text.StaticLayout
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import android.text.TextPaint
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import android.view.MotionEvent
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import android.widget.TextView
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import androidx.core.text.getSpans
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import androidx.core.text.toSpannable
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object TextUtilities {
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fun getIntrinsicHeight(text: CharSequence, paint: TextPaint, width: Int): Int {
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val builder = StaticLayout.Builder.obtain(text, 0, text.length, paint, width)
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.setAlignment(Layout.Alignment.ALIGN_NORMAL)
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.setLineSpacing(0.0f, 1.0f)
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.setIncludePad(false)
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val layout = builder.build()
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return layout.height
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}
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fun getIntrinsicLayout(text: CharSequence, paint: TextPaint, width: Int): StaticLayout {
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val builder = StaticLayout.Builder.obtain(text, 0, text.length, paint, width)
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.setAlignment(Layout.Alignment.ALIGN_NORMAL)
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.setLineSpacing(0.0f, 1.0f)
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.setIncludePad(false)
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return builder.build()
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}
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fun TextView.getIntersectedModalSpans(event: MotionEvent): List<ModalURLSpan> {
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val xInt = event.rawX.toInt()
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val yInt = event.rawY.toInt()
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val hitRect = Rect(xInt, yInt, xInt, yInt)
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return getIntersectedModalSpans(hitRect)
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}
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fun TextView.getIntersectedModalSpans(hitRect: Rect): List<ModalURLSpan> {
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val textLayout = layout ?: return emptyList()
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val lineRect = Rect()
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val bodyTextRect = Rect()
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getGlobalVisibleRect(bodyTextRect)
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val textSpannable = text.toSpannable()
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return (0 until textLayout.lineCount).flatMap { line ->
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textLayout.getLineBounds(line, lineRect)
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lineRect.offset(bodyTextRect.left + totalPaddingLeft, bodyTextRect.top + totalPaddingTop)
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if ((Rect(lineRect)).contains(hitRect)) {
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// calculate the url span intersected with (if any)
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val off = textLayout.getOffsetForHorizontal(line, hitRect.left.toFloat()) // left and right will be the same
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textSpannable.getSpans<ModalURLSpan>(off, off).toList()
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} else {
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emptyList()
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}
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}
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}
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} |