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Implement ContentAvoidingLayout for timeline items (#2113)

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* Implement `ContentAvoidingLayout` for timeline items

* Truncate long mention pills

---------

Co-authored-by: Benoit Marty <benoit@matrix.org>
Co-authored-by: ElementBot <benoitm+elementbot@element.io>
This commit is contained in:
Jorge Martin Espinosa 2024-01-03 12:32:02 +01:00 • committed by GitHub
parent 0381027dae
commit 4f6c7421bd
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GPG key ID: 4AEE18F83AFDEB23
110 changed files with 573 additions and 299 deletions
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76
libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/mentions/MentionSpan.kt
View file

@ -21,6 +21,8 @@ import android.graphics.Paint
import android.graphics.RectF
import android.graphics.Typeface
import android.text.style.ReplacementSpan
import io.element.android.libraries.core.extensions.orEmpty
import kotlin.math.min
import kotlin.math.roundToInt
class MentionSpan(
@ -32,51 +34,63 @@ class MentionSpan(
val typeface: Typeface = Typeface.DEFAULT,
) : ReplacementSpan() {
companion object {
private const val MAX_LENGTH = 20
}
private var actualText: CharSequence? = null
private var textWidth = 0
private var cachedRect: RectF = RectF()
private val backgroundPaint = Paint().apply {
isAntiAlias = true
color = backgroundColor
}
override fun getSize(paint: Paint, text: CharSequence?, start: Int, end: Int, fm: Paint.FontMetricsInt?): Int {
val mentionText = getActualText(text, start)
var actualEnd = end
if (mentionText != text.toString()) {
actualEnd = end + 1
}
val mentionText = getActualText(text, start, end)
paint.typeface = typeface
return paint.measureText(mentionText, start, actualEnd).roundToInt() + startPadding + endPadding
textWidth = paint.measureText(mentionText, 0, mentionText.length).roundToInt()
return textWidth + startPadding + endPadding
}
override fun draw(canvas: Canvas, text: CharSequence?, start: Int, end: Int, x: Float, top: Int, y: Int, bottom: Int, paint: Paint) {
val mentionText = getActualText(text, start)
var actualEnd = end
if (mentionText != text.toString()) {
actualEnd = end + 1
}
val textWidth = paint.measureText(mentionText, start, actualEnd)
val mentionText = getActualText(text, start, end)
// Extra vertical space to add below the baseline (y). This helps us center the span vertically
val extraVerticalSpace = y + paint.ascent() + paint.descent() - top
val rect = RectF(x, top.toFloat(), x + textWidth + startPadding + endPadding, y.toFloat() + extraVerticalSpace)
paint.color = backgroundColor
canvas.drawRoundRect(rect, rect.height() / 2, rect.height() / 2, paint)
if (cachedRect.isEmpty) {
cachedRect = RectF(x, top.toFloat(), x + textWidth + startPadding + endPadding, y.toFloat() + extraVerticalSpace)
}
val rect = cachedRect
val radius = rect.height() / 2
canvas.drawRoundRect(rect, radius, radius, backgroundPaint)
paint.color = textColor
paint.typeface = typeface
canvas.drawText(mentionText, start, actualEnd, x + startPadding, y.toFloat(), paint)
canvas.drawText(mentionText, 0, mentionText.length, x + startPadding, y.toFloat(), paint)
}
private fun getActualText(text: CharSequence?, start: Int): String {
return when (type) {
Type.USER -> {
val mentionText = text.toString()
if (start in mentionText.indices && mentionText[start] != '@') {
mentionText.replaceRange(start, start, "@")
} else {
mentionText
private fun getActualText(text: CharSequence?, start: Int, end: Int): CharSequence {
if (actualText != null) return actualText!!
return buildString {
val mentionText = text.orEmpty()
when (type) {
Type.USER -> {
if (start in mentionText.indices && mentionText[start] != '@') {
append("@")
}
}
Type.ROOM -> {
if (start in mentionText.indices && mentionText[start] != '#') {
append("#")
}
}
}
Type.ROOM -> {
val mentionText = text.toString()
if (start in mentionText.indices && mentionText[start] != '#') {
mentionText.replaceRange(start, start, "#")
} else {
mentionText
}
append(mentionText.substring(start, min(end, start + MAX_LENGTH)))
if (end - start > MAX_LENGTH) {
append("…")
}
actualText = this
}
}