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update thread lines

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This commit is contained in:
0xd9a 2022-05-26 13:54:15 +05:30
parent f839cede12
commit 644269d611
2 changed files with 26 additions and 38 deletions
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62
app/src/main/java/app/fedilab/android/helper/RecyclerViewThreadLines.kt
View file

@ -43,6 +43,7 @@ class RecyclerViewThreadLines(context: Context, private val lineInfoList: List<L
override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: RecyclerView.State) {
val position = parent.getChildAdapterPosition(view)
if (position < 0) return
val level = lineInfoList[position].level
val startMargin = margin * level + margin * fontScale
if (parent.layoutDirection == View.LAYOUT_DIRECTION_LTR) outRect.left = startMargin else outRect.right = startMargin
@ -53,6 +54,7 @@ class RecyclerViewThreadLines(context: Context, private val lineInfoList: List<L
for (i in 0 until childCount) {
val view = parent.getChildAt(i)
val position = parent.getChildAdapterPosition(view)
if (position < 0) return
val lineInfo = lineInfoList[position]
val level = lineInfo.level
@ -64,11 +66,11 @@ class RecyclerViewThreadLines(context: Context, private val lineInfoList: List<L
paint.color = if (j > 0) lineColors[j - 1] else Color.GRAY
// draw lines for below statuses
if (j != level && j >= lineInfo.fullLinesStart && j <= lineInfo.fullLinesEnd)
if (j != level && lineInfo.lines.contains(j))
c.drawLine(lineStart, lineTop, lineStart, view.bottom.toFloat(), paint)
// draw vertical line for current statuses
if (j == level && i != 0) {
if (j == level && position != 0) {
// top the line starts at the middle of the above status
if (i > 0) lineTop -= parent.getChildAt(i - 1).height / 2 - 1 // '- 1' is to prevent overlapping with above horizontal line
@ -76,12 +78,8 @@ class RecyclerViewThreadLines(context: Context, private val lineInfoList: List<L
var lineBottom = view.bottom.toFloat() - view.height / 2
// if below status has a full line for current level, extend the line to the bottom
if (i < lineInfoList.lastIndex - 1) {
val nextLineInfo = lineInfoList[i + 1]
if (level >= nextLineInfo.fullLinesStart && level <= nextLineInfo.fullLinesEnd) {
lineBottom = view.bottom.toFloat()
}
}
if (position < lineInfoList.lastIndex && lineInfoList[position + 1].lines.contains(level) && j != maxLevel)
lineBottom = view.bottom.toFloat()
// if level is max, use a dashed line
if (j == maxLevel) paint.pathEffect = dashPathEffect
@ -99,7 +97,7 @@ class RecyclerViewThreadLines(context: Context, private val lineInfoList: List<L
}
}
data class LineInfo(var level: Int, var end: Boolean, var fullLinesStart: Int, var fullLinesEnd: Int)
data class LineInfo(var level: Int, var lines: List<Int>)
private val Int.dpToPx: Float
get() = this * Resources.getSystem().displayMetrics.density
@ -112,43 +110,33 @@ class RecyclerViewThreadLines(context: Context, private val lineInfoList: List<L
}
}
fun getThreadDecorationInfo(fediContext: StatusContext, selectedStatusId: String): MutableList<LineInfo> {
fun getThreadDecorationInfo(statusContext: StatusContext): MutableList<LineInfo> {
val lineInfoList = mutableListOf<LineInfo>()
repeat(fediContext.ancestors.size) { lineInfoList.add(LineInfo(0, true, 0, 0)) }
lineInfoList.add(LineInfo(0, fediContext.descendants.isNotEmpty(), 0, 0))
val descendantsLineInfoList = List(fediContext.descendants.size) { LineInfo(0, false, 0, 0) }
for (i in fediContext.descendants.indices) {
fediContext.descendants[i].let { status ->
repeat(statusContext.ancestors.size) { lineInfoList.add(LineInfo(0, listOf(0))) }
lineInfoList.add(LineInfo(0, listOf(0)))
val descendantsLineInfoList = List(statusContext.descendants.size) { LineInfo(0, listOf()) }
for (i in statusContext.descendants.indices) {
statusContext.descendants[i].let { status ->
var level = 0
if (status.in_reply_to_id != null) {
if (status.in_reply_to_id == selectedStatusId)
level = 1
else {
var replyToId: String? = status.in_reply_to_id
while (replyToId != null && level < RecyclerViewThreadLines.threadLineColors.size) {
level += 1
replyToId = fediContext.descendants.firstOrNull { it.id == replyToId }?.in_reply_to_id
}
var replyToId: String? = status.in_reply_to_id
while (replyToId != null && level < RecyclerViewThreadLines.threadLineColors.size) {
level += 1
replyToId = statusContext.descendants.firstOrNull { it.id == replyToId }?.in_reply_to_id
}
}
descendantsLineInfoList[i].level = level
val firstReply = fediContext.descendants.firstOrNull { it.in_reply_to_id == status.id }
if (firstReply == null) descendantsLineInfoList[i].end = true
}
}
for (i in descendantsLineInfoList.indices) {
var fullLinesStart = descendantsLineInfoList[i].level
var fullLinesEnd = descendantsLineInfoList[i].level
var fullLinesEndSet = false
for (j in i + 1 until descendantsLineInfoList.lastIndex) {
if (!fullLinesEndSet && descendantsLineInfoList[j].level < descendantsLineInfoList[i].level) {
fullLinesEnd = descendantsLineInfoList[j].level
fullLinesEndSet = true
}
fullLinesStart = descendantsLineInfoList[j].level.coerceAtMost(fullLinesStart)
for (i in descendantsLineInfoList.indices.reversed()) {
val lines: MutableList<Int> = mutableListOf()
val lineInfo = descendantsLineInfoList[i]
lines.add(lineInfo.level)
if (i < descendantsLineInfoList.lastIndex) {
val belowLineInfo = descendantsLineInfoList[i + 1]
lines.addAll(belowLineInfo.lines.filter { it < lineInfo.level })
}
descendantsLineInfoList[i].fullLinesStart = fullLinesStart
descendantsLineInfoList[i].fullLinesEnd = fullLinesEnd
descendantsLineInfoList[i].lines = lines
}
lineInfoList.addAll(descendantsLineInfoList)

2
app/src/main/java/app/fedilab/android/ui/fragment/timeline/FragmentMastodonContext.java
View file

@ -251,7 +251,7 @@ public class FragmentMastodonContext extends Fragment {
binding.recyclerView.removeItemDecorationAt(i);
}
}
List<LineInfo> threadDecorationInfo = getThreadDecorationInfo(context, focusedStatus.id);
List<LineInfo> threadDecorationInfo = getThreadDecorationInfo(context);
binding.recyclerView.addItemDecoration(new RecyclerViewThreadLines(requireContext(), threadDecorationInfo));
binding.swipeContainer.setRefreshing(false);
binding.recyclerView.scrollToPosition(statusPosition);