--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/main/java/com/geekorum/ttrss/articles_list/TagsListBar.kt	Thu Nov 04 14:10:41 2021 -0400
@@ -0,0 +1,121 @@
+/*
+ * Geekttrss is a RSS feed reader application on the Android Platform.
+ *
+ * Copyright (C) 2017-2020 by Frederic-Charles Barthelery.
+ *
+ * This file is part of Geekttrss.
+ *
+ * Geekttrss is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Geekttrss is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Geekttrss.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.geekorum.ttrss.articles_list
+
+import androidx.compose.foundation.BorderStroke
+import androidx.compose.foundation.background
+import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.CornerSize
+import androidx.compose.material.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import com.geekorum.ttrss.ui.AppTheme
+
+
+@Composable
+fun TagsListBar(
+    tags: Set<String>,
+    selectedTag: String?,
+    selectedTagChange: (String?) -> Unit,
+    modifier: Modifier = Modifier
+) {
+    Surface(modifier = modifier) {
+        val scrollState = rememberScrollState()
+        Row(horizontalArrangement = Arrangement.spacedBy(8.dp),
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier
+                .height(48.dp)
+                .horizontalScroll(scrollState)
+        ) {
+            Spacer(Modifier.size(8.dp))
+            AppTheme(colors = MaterialTheme.colors.copy(primary = MaterialTheme.colors.secondaryVariant)) {
+                tags.forEach { tag ->
+                    Chip(text = tag, selected = tag == selectedTag,
+                        onClick = {
+                            selectedTagChange(tag.takeUnless { tag == selectedTag })
+                        }
+                    )
+                }
+            }
+            Spacer(Modifier.size(8.dp))
+        }
+    }
+}
+
+
+@OptIn(ExperimentalMaterialApi::class)
+@Composable
+private fun Chip(
+    text: String,
+    selected: Boolean,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    val backgroundColor = if (selected)
+        MaterialTheme.colors.secondaryVariant
+    else MaterialTheme.colors.onSurface
+    val backgroundColorAlpha = if (selected) {
+        0.24f
+    } else 0.10f
+    Card(
+        onClick = onClick,
+        modifier = modifier.height(32.dp),
+        shape = MaterialTheme.shapes.small.copy(topStart = CornerSize(50), bottomEnd = CornerSize(50)),
+        border = BorderStroke(1.dp, backgroundColor.copy(alpha = backgroundColorAlpha)),
+        elevation = 2.dp
+    ) {
+        Box(Modifier
+            .background(backgroundColor.copy(alpha = backgroundColorAlpha))
+        ) {
+            Row(
+                modifier = Modifier.fillMaxHeight()
+                    .padding(horizontal = 16.dp),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                val textColor = if (selected) {
+                    MaterialTheme.colors.primary
+                } else MaterialTheme.colors.onSurface.copy(alpha = 0.87f)
+                Text(text = text,
+                    style = MaterialTheme.typography.body2,
+                    color = textColor
+                )
+            }
+        }
+    }
+}
+
+@Preview
+@Composable
+private fun PreviewTagsListBar() {
+    AppTheme {
+        var selected: String? by remember { mutableStateOf("phone") }
+        TagsListBar(setOf("tv", "games", "phone", "android"),
+            selectedTag = selected,
+            selectedTagChange = { selected = it },
+            modifier = Modifier.padding(vertical = 16.dp)
+        )
+    }
+}