Reimplement LobstersItem to not require swipe actions

app/src/main/java/dev/msfjarvis/lobsters/ui/main/MainActivity.kt

@@ -85,8 +85,8 @@ fun LobstersApp() {
         HottestPosts(
           posts = hottestPosts,
           listState = hottestPostsListState,
-          saveAction = viewModel::savePost,
           overscrollAction = viewModel::getMorePosts,
+          saveAction = viewModel::savePost,
         )
       }
       composable(Destination.Saved.route) {

app/src/main/java/dev/msfjarvis/lobsters/ui/posts/HottestPosts.kt

@@ -14,8 +14,8 @@ fun HottestPosts(
   posts: List<LobstersPost>,
   listState: LazyListState,
   modifier: Modifier = Modifier,
-  saveAction: (LobstersPost) -> Unit,
   overscrollAction: () -> Unit,
+  saveAction: (LobstersPost) -> Unit,
 ) {
   val urlLauncher = UrlLauncherAmbient.current
 
@@ -32,9 +32,9 @@ fun HottestPosts(
       }
       LobstersItem(
         post = item,
-        linkOpenAction = { post -> urlLauncher.launch(post.url.ifEmpty { post.commentsUrl }) },
-        commentOpenAction = { post -> urlLauncher.launch(post.commentsUrl) },
-        saveAction = saveAction,
+        onClick = { urlLauncher.launch(item.url.ifEmpty { item.commentsUrl }) },
+        onLongClick = { urlLauncher.launch(item.commentsUrl) },
+        onSaveButtonClick = { saveAction.invoke(item) },
       )
     }
   }

app/src/main/java/dev/msfjarvis/lobsters/ui/posts/LobstersItem.kt

@@ -4,148 +4,158 @@ import androidx.compose.foundation.Text
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ConstraintLayout
 import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.offsetPx
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.layout.wrapContentHeight
 import androidx.compose.foundation.lazy.LazyColumnFor
-import androidx.compose.foundation.lazy.LazyItemScope
 import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material.FractionalThreshold
-import androidx.compose.material.rememberSwipeableState
-import androidx.compose.material.swipeable
+import androidx.compose.material.Surface
+import androidx.compose.material.ripple.RippleIndication
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.gesture.scrollorientationlocking.Orientation
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.platform.ConfigurationAmbient
-import androidx.compose.ui.platform.DensityAmbient
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.ui.tooling.preview.Preview
 import coil.transform.CircleCropTransformation
 import dev.chrisbanes.accompanist.coil.CoilImage
+import dev.msfjarvis.lobsters.R
 import dev.msfjarvis.lobsters.model.LobstersPost
 import dev.msfjarvis.lobsters.model.Submitter
 import dev.msfjarvis.lobsters.ui.theme.LobstersTheme
 import dev.msfjarvis.lobsters.ui.theme.titleColor
+import dev.msfjarvis.lobsters.util.IconResource
 
-private enum class SwipeState {
-  NotSwiped,
-  FullySwiped,
-}
+val TEST_POST = LobstersPost(
+  "zqyydb",
+  "https://lobste.rs/s/zqyydb",
+  "2020-09-21T07:11:14.000-05:00",
+  "k2k20 hackathon report: Bob Beck on LibreSSL progress",
+  "https://undeadly.org/cgi?action=article;sid=20200921105847",
+  4,
+  0,
+  0,
+  "",
+  "https://lobste.rs/s/zqyydb/k2k20_hackathon_report_bob_beck_on",
+  Submitter(
+    "Vigdis",
+    "2017-02-27T21:08:14.000-06:00",
+    false,
+    "Alleycat for the fun, sys/net admin for a living and OpenBSD contributions for the pleasure. (Not so) French dude in Montreal\r\n\r\nhttps://chown.me",
+    false,
+    76,
+    "/avatars/Vigdis-100.png",
+    "sevan",
+    null,
+    null,
+    emptyList(),
+  ),
+  listOf("openbsd", "linux", "containers", "hack the planet", "no thanks"),
+)
 
 @Composable
-fun LazyItemScope.LobstersItem(
+fun LobstersItem(
   post: LobstersPost,
-  modifier: Modifier = Modifier,
-  linkOpenAction: (LobstersPost) -> Unit,
-  commentOpenAction: (LobstersPost) -> Unit,
-  saveAction: (LobstersPost) -> Unit,
+  onClick: () -> Unit,
+  onLongClick: () -> Unit,
+  onSaveButtonClick: () -> Unit,
 ) {
-  val width = with(DensityAmbient.current) {
-    ConfigurationAmbient.current.screenWidthDp.toDp().toPx()
-  }
-  val swipeableState = rememberSwipeableState(SwipeState.NotSwiped)
-  val anchors = mapOf(0f to SwipeState.NotSwiped, width to SwipeState.FullySwiped)
-  if (swipeableState.offset.value >= (width / 2)) {
-    saveAction.invoke(post)
-    swipeableState.animateTo(SwipeState.NotSwiped)
-  }
-
-  Column(
-    modifier = modifier
-      .fillParentMaxWidth()
-      .swipeable(
-        state = swipeableState,
-        anchors = anchors,
-        thresholds = { _, _ -> FractionalThreshold(0.5f) },
-        orientation = Orientation.Horizontal
-      )
-      .offsetPx(swipeableState.offset)
+  Surface(
+    modifier = Modifier.fillMaxWidth()
       .clickable(
-        onClick = { linkOpenAction.invoke(post) },
-        onLongClick = { commentOpenAction.invoke(post) },
+        onClick = onClick,
+        onLongClick = onLongClick,
       ),
   ) {
-    Text(
-      text = post.title,
-      color = titleColor,
-      fontWeight = FontWeight.Bold,
-      modifier = Modifier.padding(top = 4.dp)
-    )
-    Row(
-      modifier = Modifier.padding(vertical = 8.dp),
-      horizontalArrangement = Arrangement.spacedBy(8.dp),
-    ) {
-      post.tags.take(4).forEach { tag ->
-        Text(
-          text = tag,
-          modifier = Modifier
-            .background(Color(0xFFFFFCD7), RoundedCornerShape(8.dp))
-            .padding(vertical = 2.dp, horizontal = 6.dp),
-          color = Color.DarkGray,
-        )
-      }
-    }
-    Row(
-      modifier = Modifier.wrapContentHeight(),
+    ConstraintLayout(
+      modifier = Modifier.padding(start = 4.dp, end = 4.dp),
     ) {
+      val (title, tags, avatar, submitter, saveButton) = createRefs()
+      Text(
+        text = post.title,
+        color = titleColor,
+        fontWeight = FontWeight.Bold,
+        modifier = Modifier.padding(top = 4.dp)
+          .constrainAs(title) {
+            top.linkTo(parent.top)
+            start.linkTo(parent.start)
+          },
+      )
+      TagRow(
+        tags = post.tags,
+        modifier = Modifier.constrainAs(tags) {
+          top.linkTo(title.bottom)
+        }.padding(vertical = 8.dp),
+      )
       CoilImage(
         data = "https://lobste.rs/${post.submitterUser.avatarUrl}",
         fadeIn = true,
         requestBuilder = {
           transformations(CircleCropTransformation())
         },
-        modifier = Modifier.width(30.dp).padding(4.dp).align(Alignment.CenterVertically),
+        modifier = Modifier.width(30.dp).padding(4.dp)
+          .constrainAs(avatar) {
+            top.linkTo(tags.bottom)
+            start.linkTo(parent.start)
+          },
       )
       Text(
         text = "submitted by ${post.submitterUser.username}",
-        modifier = Modifier.padding(bottom = 4.dp).align(Alignment.CenterVertically),
+        modifier = Modifier.padding(bottom = 4.dp).constrainAs(submitter) {
+          top.linkTo(tags.bottom)
+          start.linkTo(avatar.end)
+        },
+      )
+      IconResource(
+        resourceId = R.drawable.ic_favorite_border_24px,
+        modifier = Modifier.padding(8.dp)
+          .clickable(
+            onClick = onSaveButtonClick,
+            indication = RippleIndication(),
+          )
+          .constrainAs(saveButton) {
+            end.linkTo(parent.end)
+            centerVerticallyTo(parent)
+          },
+        tint = Color(0xFFD97373),
+      )
+    }
+  }
+}
+
+@Composable
+fun TagRow(
+  tags: List<String>,
+  modifier: Modifier = Modifier,
+) {
+  Row(
+    modifier = Modifier.then(modifier),
+    horizontalArrangement = Arrangement.spacedBy(8.dp),
+  ) {
+    tags.take(3).forEach { tag ->
+      Text(
+        text = tag,
+        modifier = Modifier
+          .background(Color(0xFFFFFCD7), RoundedCornerShape(8.dp))
+          .padding(vertical = 2.dp, horizontal = 6.dp),
+        color = Color.DarkGray,
       )
     }
   }
 }
 
 @Composable
 @Preview
-fun PreviewLobstersItem() {
-  val post = LobstersPost(
-    "zqyydb",
-    "https://lobste.rs/s/zqyydb",
-    "2020-09-21T07:11:14.000-05:00",
-    "k2k20 hackathon report: Bob Beck on LibreSSL progress",
-    "https://undeadly.org/cgi?action=article;sid=20200921105847",
-    4,
-    0,
-    0,
-    "",
-    "https://lobste.rs/s/zqyydb/k2k20_hackathon_report_bob_beck_on",
-    Submitter(
-      "Vigdis",
-      "2017-02-27T21:08:14.000-06:00",
-      false,
-      "Alleycat for the fun, sys/net admin for a living and OpenBSD contributions for the pleasure. (Not so) French dude in Montreal\r\n\r\nhttps://chown.me",
-      false,
-      76,
-      "/avatars/Vigdis-100.png",
-      "sevan",
-      null,
-      null,
-      emptyList(),
-    ),
-    listOf("openbsd"),
-  )
+fun Preview() {
   LobstersTheme {
-    LazyColumnFor(items = listOf(post)) { item ->
+    LazyColumnFor(items = listOf(TEST_POST, TEST_POST, TEST_POST, TEST_POST, TEST_POST)) { item ->
       LobstersItem(
         post = item,
-        linkOpenAction = {},
-        commentOpenAction = {},
-        saveAction = {},
+        onClick = {},
+        onLongClick = {},
+        onSaveButtonClick = {},
       )
     }
   }

app/src/main/java/dev/msfjarvis/lobsters/ui/posts/SavedPosts.kt

@@ -13,7 +13,7 @@ import dev.msfjarvis.lobsters.ui.urllauncher.UrlLauncherAmbient
 fun SavedPosts(
   posts: List<LobstersPost>,
   modifier: Modifier = Modifier,
-  saveAction: (LobstersPost) -> Unit
+  saveAction: (LobstersPost) -> Unit,
 ) {
   val listState = rememberLazyListState()
   val urlLauncher = UrlLauncherAmbient.current
@@ -28,9 +28,9 @@ fun SavedPosts(
     ) { item ->
       LobstersItem(
         post = item,
-        linkOpenAction = { post -> urlLauncher.launch(post.url.ifEmpty { post.commentsUrl }) },
-        commentOpenAction = { post -> urlLauncher.launch(post.commentsUrl) },
-        saveAction = saveAction,
+        onClick = { urlLauncher.launch(item.url.ifEmpty { item.commentsUrl }) },
+        onLongClick = { urlLauncher.launch(item.commentsUrl) },
+        onSaveButtonClick = { saveAction.invoke(item) },
       )
     }
   }