From a15a47f350b1af39a92069dd04f080c2a7cd74a1 Mon Sep 17 00:00:00 2001
From: Eduard Kuzmenko <thanwords24@gmail.com>
Date: Sun, 18 Jul 2021 13:57:10 +0300
Subject: [PATCH] Improve pinned messages border

---
 src/components/chat/pinnedMessageBorder.ts | 13 +++++-
 src/scss/partials/_chatPinned.scss         | 54 ++++++++++++++++++++--
 2 files changed, 61 insertions(+), 6 deletions(-)

diff --git a/src/components/chat/pinnedMessageBorder.ts b/src/components/chat/pinnedMessageBorder.ts
index f1890d96..99f65e5f 100644
--- a/src/components/chat/pinnedMessageBorder.ts
+++ b/src/components/chat/pinnedMessageBorder.ts
@@ -123,7 +123,8 @@ export default class PinnedMessageBorder {
     }
 
     // return (index + 1) * barHeight + index * GAP;
-    return (barHeight + GAP * 2) / 2 + (index - 2) * (barHeight + GAP);
+    return index * barHeight - (count - index - 1) * GAP;
+    //return (barHeight + GAP * 2) / 2 + (index - 2) * (barHeight + GAP);
   };
 
   private getTrackHeight = (count: number, barHeight: number) => {
@@ -161,6 +162,16 @@ export default class PinnedMessageBorder {
 
     this.border.classList.toggle(BASE_CLASS + '-mask', count > 4);
 
+    if(index <= 1) {
+      this.border.classList.add('mask-bottom');
+      this.border.classList.remove('mask-top');
+    } else if(index >= (count - 2)) {
+      this.border.classList.add('mask-top');
+      this.border.classList.remove('mask-bottom');
+    } else {
+      this.border.classList.add('mask-top', 'mask-bottom');
+    }
+
     this.wrapper.className = BASE_CLASS + '-wrapper';
     this.wrapper.style.cssText = `clip-path: url(#${clipPathId}); width: 2px; height: ${trackHeight}px; transform: translateY(-${trackTranslateY}px);`;
     
diff --git a/src/scss/partials/_chatPinned.scss b/src/scss/partials/_chatPinned.scss
index 85ff329b..d1774204 100644
--- a/src/scss/partials/_chatPinned.scss
+++ b/src/scss/partials/_chatPinned.scss
@@ -9,6 +9,7 @@
     position: relative;
     height: 2rem;
     width: .125rem;
+    flex: 0 0 auto;
     // padding: .125rem 0;
 
     &-wrapper-1 {
@@ -22,8 +23,50 @@
     }
 
     &-mask {
-      height: 2.5rem;
-      mask-image: linear-gradient(to bottom, transparent 0, black 4px, black 36px, transparent 40px);
+      --mask-height: .375rem;
+      --height: 2.5rem;
+      height: var(--height);
+      overflow: hidden;
+      /* mask-image: linear-gradient(to bottom, transparent 0, black var(--mask-height), black calc(var(--height) - var(--mask-height)), transparent var(--height));
+      
+      &.mask-top {
+        mask-image: linear-gradient(to bottom, transparent 0, black var(--mask-height));
+      }
+
+      &.mask-bottom {
+        mask-image: linear-gradient(to bottom, black calc(var(--height) - var(--mask-height)), transparent var(--height));
+      } */
+
+      &:before, 
+      &:after {
+        position: absolute;
+        left: 0;
+        right: 0;
+        content: " ";
+        display: block;
+        z-index: 1;
+        height: var(--mask-height);
+        opacity: 0;
+
+        @include animation-level(2) {
+          transition: opacity .2s ease-in-out;
+        }
+      }
+
+      &:before {
+        top: 0;
+        background: linear-gradient(var(--surface-color), transparent);
+      }
+
+      &:after {
+        bottom: 0;
+        background: linear-gradient(transparent, var(--surface-color));
+      }
+
+      &.mask-top:before,
+      &.mask-bottom:after {
+        opacity: 1;
+      }
     }
 
     &-wrapper {
@@ -117,7 +160,7 @@
     //line-height: 18px;
     //line-height: 1;
     //line-height: 15px;
-    line-height: 16px;
+    line-height: var(--line-height);
     overflow: hidden;
     white-space: nowrap;
     text-overflow: ellipsis;
@@ -357,6 +400,7 @@
     .pinned-message-subtitle {
       position: relative;
       height: calc(var(--height) / 2);
+      min-height: calc(var(--height) / 2);
       overflow: visible;
 
       @include animation-level(2) {
@@ -366,8 +410,8 @@
   }
 
   &-title {
-    margin-top: -.0625rem;
-    margin-bottom: .1875rem;
+    margin-top: -.125rem;
+    margin-bottom: .25rem;
   }
 
   &-subtitle {