From ef987eef560befc9882b676a71c80a19b78463ae Mon Sep 17 00:00:00 2001
From: Andrey Sobolev <haiodo@users.noreply.github.com>
Date: Tue, 25 Apr 2023 23:11:50 +0700
Subject: [PATCH] TSK-1323: Fix colors for list (#3069)

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>
---
 packages/ui/src/colors.ts                     | 165 +++++++++++++-----
 .../src/components/icons/CollapseArrow.svelte |   2 +-
 packages/ui/src/types.ts                      |   4 +-
 .../src/components/AssigneeBox.svelte         |   2 +-
 .../src/components/Avatar.svelte              |  36 +++-
 .../EmployeeAttributePresenter.svelte         |   2 +
 .../src/components/EmployeePresenter.svelte   |   1 +
 .../components/EmployeeRefPresenter.svelte    |  22 ++-
 .../src/components/PersonContent.svelte       |   4 +-
 .../src/components/PersonPresenter.svelte     |   1 +
 .../src/components/UserInfo.svelte            |   2 +-
 .../src/components/activity/StatusIcon.svelte |   2 +-
 .../src/components/icons/StatusIcon.svelte    |  20 ++-
 .../components/issues/IssueStatusIcon.svelte  |   7 +-
 .../components/issues/StatusPresenter.svelte  |   2 +-
 .../issues/StatusRefPresenter.svelte          |   1 +
 .../src/components/list/ListHeader.svelte     | 114 +++++++-----
 17 files changed, 275 insertions(+), 112 deletions(-)

diff --git a/packages/ui/src/colors.ts b/packages/ui/src/colors.ts
index fe1a07a043..e7a69d0e40 100644
--- a/packages/ui/src/colors.ts
+++ b/packages/ui/src/colors.ts
@@ -82,6 +82,27 @@ export function hexColorToNumber (hexColor: string): number {
   return parseInt(hexColor.replace('#', ''), 16)
 }
 
+/**
+ * @public
+ */
+export function hexToRgb (color: string): { r: number, g: number, b: number } {
+  if (!color.startsWith('#')) {
+    return { r: 128, g: 128, b: 128 }
+  }
+  color = color.replace('#', '')
+  if (color.length === 3) {
+    color = color
+      .split('')
+      .map((c) => c + c)
+      .join('')
+  }
+  return {
+    r: parseInt(color.slice(0, 2), 16),
+    g: parseInt(color.slice(2, 4), 16),
+    b: parseInt(color.slice(4, 6), 16)
+  }
+}
+
 /**
  * @public
  */
@@ -110,54 +131,106 @@ export function numberToRGB (color: number, alpha?: number): string {
 /**
  * @public
  */
-export function hsvToRGB (h: number, s: number, v: number): { r: number, g: number, b: number, rgb: string } {
+export function hslToRgb (h: number, s: number, l: number): { r: number, g: number, b: number } {
+  s /= 100
+  l /= 100
+  const k = (n: number): number => (n + h / 30) % 12
+  const a = s * Math.min(l, 1 - l)
+  const f = (n: number): number => l - a * Math.max(-1, Math.min(k(n) - 3, Math.min(9 - k(n), 1)))
+  return { r: 255 * f(0), g: 255 * f(8), b: 255 * f(4) }
+}
+
+/**
+ * @public
+ */
+export function rgbToHex (color: { r: number, g: number, b: number }): string {
+  function addZero (d: string): string {
+    if (d.length < 2) {
+      return '0' + d
+    }
+    return d
+  }
+  return (
+    '#' +
+    addZero((Math.round(color.r) % 255).toString(16)) +
+    addZero((Math.round(color.g) % 255).toString(16)) +
+    addZero((Math.round(color.b) % 255).toString(16))
+  )
+}
+
+export async function svgToColor (img: SVGSVGElement): Promise<{ r: number, g: number, b: number } | undefined> {
+  const outerHTML = img.outerHTML
+  const blob = new Blob([outerHTML], { type: 'image/svg+xml;charset=utf-8' })
+  const blobURL = URL.createObjectURL(blob)
+  const image = new Image()
+  return await new Promise((resolve) => {
+    image.setAttribute('crossOrigin', '')
+    image.src = blobURL
+    image.onload = () => {
+      resolve(imageToColor(image))
+    }
+  })
+}
+
+/**
+ * @public
+ */
+export function imageToColor (image: HTMLImageElement): { r: number, g: number, b: number } | undefined {
+  const canvas = document.createElement('canvas')
+
+  const height = (canvas.height = image.naturalHeight ?? image.offsetHeight ?? image.height)
+  const width = (canvas.width = image.naturalWidth ?? image.offsetWidth ?? image.width)
+  canvas.width = width
+  canvas.height = height
+
+  const blockSize = 5
+
   let r: number = 0
   let g: number = 0
   let b: number = 0
-  const i = Math.floor(h * 6)
-  const f = h * 6 - i
-  const p = v * (1 - s)
-  const q = v * (1 - f * s)
-  const t = v * (1 - (1 - f) * s)
-  switch (i % 6) {
-    case 0:
-      r = v
-      g = t
-      b = p
-      break
-    case 1:
-      r = q
-      g = v
-      b = p
-      break
-    case 2:
-      r = p
-      g = v
-      b = t
-      break
-    case 3:
-      r = p
-      g = q
-      b = v
-      break
-    case 4:
-      r = t
-      g = p
-      b = v
-      break
-    case 5:
-      r = v
-      g = p
-      b = q
-      break
-  }
-  r = Math.round(r * 255)
-  g = Math.round(g * 255)
-  b = Math.round(b * 255)
-  return {
-    r,
-    g,
-    b,
-    rgb: '#' + r.toString(16) + g.toString(16) + b.toString(16)
+  let count = 0
+
+  const context = canvas.getContext('2d')
+
+  if (context != null) {
+    context.drawImage(image, 0, 0, width, height)
+    context.beginPath()
+    context.arc(0, 0, 60, 0, Math.PI * 2, true)
+    context.clip()
+    context.fillRect(0, 0, width, height)
+
+    const data = context?.getImageData(0, 0, width, height).data
+
+    const length = data.length
+
+    let i = 0
+    while (i < length) {
+      if (data[i] > 5 && data[i + 1] > 5 && data[i + 2] > 5 && data[i + 3] > 50) {
+        ++count
+        r += data[i]
+        g += data[i + 1]
+        b += data[i + 2]
+      }
+      i += blockSize * 4
+    }
+
+    r = Math.round(r / count)
+    g = Math.round(g / count)
+    b = Math.round(b / count)
+    return { r, g, b }
+  }
+}
+
+export function rgbToHsl (r: number, g: number, b: number): { h: number, s: number, l: number } {
+  r /= 255
+  g /= 255
+  b /= 255
+  const l = Math.max(r, g, b)
+  const s = l - Math.min(r, g, b)
+  const h = s > 0 ? (l === r ? (g - b) / s : l === g ? 2 + (b - r) / s : 4 + (r - g) / s) : 0
+  return {
+    h: 60 * h < 0 ? 60 * h + 360 : 60 * h,
+    s: 100 * (s > 0 ? (l <= 0.5 ? s / (2 * l - s) : s / (2 - (2 * l - s))) : 0),
+    l: (100 * (2 * l - s)) / 2
   }
 }
diff --git a/packages/ui/src/components/icons/CollapseArrow.svelte b/packages/ui/src/components/icons/CollapseArrow.svelte
index 4ec4f10386..dd863e4a8d 100644
--- a/packages/ui/src/components/icons/CollapseArrow.svelte
+++ b/packages/ui/src/components/icons/CollapseArrow.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
   export let size: 'small' | 'medium' | 'large'
-  const fill: string = 'currentColor'
+  export let fill: string = 'currentColor'
 </script>
 
 <svg class="svg-{size}" {fill} viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg">
diff --git a/packages/ui/src/types.ts b/packages/ui/src/types.ts
index 0eaa351d73..a47df328d4 100644
--- a/packages/ui/src/types.ts
+++ b/packages/ui/src/types.ts
@@ -15,7 +15,7 @@
 import { Timestamp } from '@hcengineering/core'
 import type { Asset, IntlString } from '@hcengineering/platform'
 import { /* Metadata, Plugin, plugin, */ Resource /*, Service */ } from '@hcengineering/platform'
-import { /* getContext, */ SvelteComponent } from 'svelte'
+import { /* getContext, */ ComponentType } from 'svelte'
 
 /**
  * Describe a browser URI location parsed to path, query and fragment.
@@ -55,7 +55,7 @@ export function areLocationsEqual (loc1: Location, loc2: Location): boolean {
   return keys1.findIndex((k) => loc1.query?.[k] !== loc2.query?.[k]) < 0
 }
 
-export type AnySvelteComponent = typeof SvelteComponent
+export type AnySvelteComponent = ComponentType
 export type Component<C extends AnySvelteComponent> = Resource<C>
 export type AnyComponent = Resource<AnySvelteComponent>
 
diff --git a/plugins/contact-resources/src/components/AssigneeBox.svelte b/plugins/contact-resources/src/components/AssigneeBox.svelte
index 740e6e34e7..c27f686f90 100644
--- a/plugins/contact-resources/src/components/AssigneeBox.svelte
+++ b/plugins/contact-resources/src/components/AssigneeBox.svelte
@@ -145,7 +145,7 @@
         >
           {#if selected}
             {#if hideIcon || selected}
-              <UserInfo value={selected} size={kind === 'link' ? 'x-small' : 'tiny'} {icon} />
+              <UserInfo value={selected} size={kind === 'link' ? 'x-small' : 'tiny'} {icon} on:accent-color />
             {:else}
               {getName(selected)}
             {/if}
diff --git a/plugins/contact-resources/src/components/Avatar.svelte b/plugins/contact-resources/src/components/Avatar.svelte
index bc907c2287..873c657a7a 100644
--- a/plugins/contact-resources/src/components/Avatar.svelte
+++ b/plugins/contact-resources/src/components/Avatar.svelte
@@ -31,7 +31,8 @@
   import { Client, Ref } from '@hcengineering/core'
   import { Asset, getResource } from '@hcengineering/platform'
   import { getBlobURL, getClient } from '@hcengineering/presentation'
-  import { AnySvelteComponent, Icon, IconSize } from '@hcengineering/ui'
+  import { AnySvelteComponent, Icon, IconSize, hexToRgb, imageToColor } from '@hcengineering/ui'
+  import { createEventDispatcher } from 'svelte'
   import { getAvatarProviderId } from '../utils'
   import AvatarIcon from './icons/Avatar.svelte'
 
@@ -43,6 +44,8 @@
   let url: string | undefined
   let avatarProvider: AvatarProvider | undefined
 
+  const dispatch = createEventDispatcher()
+
   async function update (size: IconSize, avatar?: string | null, direct?: Blob) {
     if (direct !== undefined) {
       getBlobURL(direct).then((blobURL) => {
@@ -78,17 +81,44 @@
 
       const color = (await getResource(avatarProvider.getUrl))(uri, size)
       style = `background-color: ${color}`
+      accentColor = hexToRgb(color)
+      dispatch('accent-color', accentColor)
     }
   }
   $: updateStyle(avatar, avatarProvider)
+
+  let imageElement: HTMLImageElement | undefined = undefined
+  let accentColor: any | undefined
 </script>
 
 <div class="ava-{size} flex-center avatar-container" class:no-img={!url} {style}>
   {#if url}
     {#if size === 'large' || size === 'x-large'}
-      <img class="ava-{size} ava-blur" src={url} alt={''} />
+      <img
+        class="ava-{size} ava-blur"
+        src={url}
+        alt={''}
+        bind:this={imageElement}
+        on:load={(data) => {
+          if (imageElement !== undefined) {
+            accentColor = imageToColor(imageElement)
+            dispatch('accent-color', accentColor)
+          }
+        }}
+      />
     {/if}
-    <img class="ava-{size} ava-mask" src={url} alt={''} />
+    <img
+      class="ava-{size} ava-mask"
+      src={url}
+      alt={''}
+      bind:this={imageElement}
+      on:load={(data) => {
+        if (imageElement !== undefined) {
+          accentColor = imageToColor(imageElement)
+          dispatch('accent-color', accentColor)
+        }
+      }}
+    />
   {:else}
     <Icon icon={icon ?? AvatarIcon} {size} />
   {/if}
diff --git a/plugins/contact-resources/src/components/EmployeeAttributePresenter.svelte b/plugins/contact-resources/src/components/EmployeeAttributePresenter.svelte
index 2a4f6fc192..73fae8b73c 100644
--- a/plugins/contact-resources/src/components/EmployeeAttributePresenter.svelte
+++ b/plugins/contact-resources/src/components/EmployeeAttributePresenter.svelte
@@ -38,6 +38,7 @@
     showNavigate={false}
     justify={'left'}
     on:change={({ detail }) => onChange?.(detail)}
+    on:accent-color
   />
 {:else}
   <EmployeePresenter
@@ -53,5 +54,6 @@
     disableClick
     {colorInherit}
     {accent}
+    on:accent-color
   />
 {/if}
diff --git a/plugins/contact-resources/src/components/EmployeePresenter.svelte b/plugins/contact-resources/src/components/EmployeePresenter.svelte
index 0bd7ad8dd4..1d5948e9cc 100644
--- a/plugins/contact-resources/src/components/EmployeePresenter.svelte
+++ b/plugins/contact-resources/src/components/EmployeePresenter.svelte
@@ -38,4 +38,5 @@
   {accent}
   {defaultName}
   statusLabel={value?.active === false && shouldShowName ? contact.string.Inactive : undefined}
+  on:accent-color
 />
diff --git a/plugins/contact-resources/src/components/EmployeeRefPresenter.svelte b/plugins/contact-resources/src/components/EmployeeRefPresenter.svelte
index 4f5c4be879..519dff0fe3 100644
--- a/plugins/contact-resources/src/components/EmployeeRefPresenter.svelte
+++ b/plugins/contact-resources/src/components/EmployeeRefPresenter.svelte
@@ -17,11 +17,29 @@
 {#if Array.isArray(value)}
   <div class="inline-content">
     {#each value as employee}
-      <EmployeeAttributePresenter value={employee} {kind} {tooltipLabels} {onChange} {inline} {colorInherit} {accent} />
+      <EmployeeAttributePresenter
+        value={employee}
+        {kind}
+        {tooltipLabels}
+        {onChange}
+        {inline}
+        {colorInherit}
+        {accent}
+        on:accent-color
+      />
     {/each}
   </div>
 {:else}
-  <EmployeeAttributePresenter {value} {kind} {tooltipLabels} {onChange} {inline} {colorInherit} {accent} />
+  <EmployeeAttributePresenter
+    {value}
+    {kind}
+    {tooltipLabels}
+    {onChange}
+    {inline}
+    {colorInherit}
+    {accent}
+    on:accent-color
+  />
 {/if}
 
 <style lang="scss">
diff --git a/plugins/contact-resources/src/components/PersonContent.svelte b/plugins/contact-resources/src/components/PersonContent.svelte
index 6d78513b23..c60cfa82b5 100644
--- a/plugins/contact-resources/src/components/PersonContent.svelte
+++ b/plugins/contact-resources/src/components/PersonContent.svelte
@@ -57,7 +57,7 @@
           class:mr-2={shouldShowName && !enlargedText}
           class:mr-3={shouldShowName && enlargedText}
         >
-          <Avatar size={avatarSize} avatar={value.avatar} />
+          <Avatar size={avatarSize} avatar={value.avatar} on:accent-color />
         </span>
       {/if}
       {#if shouldShowName}
@@ -79,7 +79,7 @@
         class:mr-2={shouldShowName && !enlargedText}
         class:mr-3={shouldShowName && enlargedText}
       >
-        <Avatar size={avatarSize} />
+        <Avatar size={avatarSize} on:accent-color />
       </span>
     {/if}
     {#if shouldShowName && defaultName}
diff --git a/plugins/contact-resources/src/components/PersonPresenter.svelte b/plugins/contact-resources/src/components/PersonPresenter.svelte
index d80782cd1f..663c0ce83a 100644
--- a/plugins/contact-resources/src/components/PersonPresenter.svelte
+++ b/plugins/contact-resources/src/components/PersonPresenter.svelte
@@ -78,5 +78,6 @@
     {colorInherit}
     {accent}
     bind:element
+    on:accent-color
   />
 {/if}
diff --git a/plugins/contact-resources/src/components/UserInfo.svelte b/plugins/contact-resources/src/components/UserInfo.svelte
index 82c975436b..dd84f2ab0a 100644
--- a/plugins/contact-resources/src/components/UserInfo.svelte
+++ b/plugins/contact-resources/src/components/UserInfo.svelte
@@ -27,7 +27,7 @@
 
 <!-- svelte-ignore a11y-click-events-have-key-events -->
 <div class="flex-row-center" on:click>
-  <Avatar avatar={value.avatar} {size} {icon} />
+  <Avatar avatar={value.avatar} {size} {icon} on:accent-color />
   <div class="flex-col min-w-0 {size === 'tiny' || size === 'inline' ? 'ml-1' : 'ml-2'}">
     {#if subtitle}<div class="content-dark-color text-sm">{subtitle}</div>{/if}
     <div class="content-accent-color overflow-label text-left">{getName(value)}</div>
diff --git a/plugins/tracker-resources/src/components/activity/StatusIcon.svelte b/plugins/tracker-resources/src/components/activity/StatusIcon.svelte
index 3a227d61e8..a2ce92fa2f 100644
--- a/plugins/tracker-resources/src/components/activity/StatusIcon.svelte
+++ b/plugins/tracker-resources/src/components/activity/StatusIcon.svelte
@@ -26,6 +26,6 @@
 
 <div class="icon">
   {#if status}
-    <IssueStatusIcon value={status} size="small" />
+    <IssueStatusIcon value={status} size="small" on:accent-color />
   {/if}
 </div>
diff --git a/plugins/tracker-resources/src/components/icons/StatusIcon.svelte b/plugins/tracker-resources/src/components/icons/StatusIcon.svelte
index e54a90ad66..cb643aa69f 100644
--- a/plugins/tracker-resources/src/components/icons/StatusIcon.svelte
+++ b/plugins/tracker-resources/src/components/icons/StatusIcon.svelte
@@ -1,18 +1,34 @@
 <script lang="ts">
   import { StatusCategory } from '@hcengineering/core'
-  import { IconSize } from '@hcengineering/ui'
+  import { IconSize, hexToRgb } from '@hcengineering/ui'
+  import { createEventDispatcher, onMount } from 'svelte'
   import tracker from '../../plugin'
 
   export let size: IconSize
-  export let fill: string = 'currentColor'
+  const defaultFill = 'currentColor'
+  export let fill: string = defaultFill
   export let category: StatusCategory
   export let statusIcon: {
     index: number | undefined
     count: number | undefined
   } = { index: 0, count: 0 }
+
+  let element: SVGSVGElement
+
+  const dispatch = createEventDispatcher()
+
+  const dispatchAccentColor = (fill: string) =>
+    dispatch('accent-color', fill !== defaultFill ? hexToRgb(fill) : 'var(--theme-halfcontent-color)')
+
+  $: dispatchAccentColor(fill)
+
+  onMount(() => {
+    dispatchAccentColor(fill)
+  })
 </script>
 
 <svg
+  bind:this={element}
   class="svg-{size}"
   {fill}
   id={category._id}
diff --git a/plugins/tracker-resources/src/components/issues/IssueStatusIcon.svelte b/plugins/tracker-resources/src/components/issues/IssueStatusIcon.svelte
index cf8801113a..fdd3e36893 100644
--- a/plugins/tracker-resources/src/components/issues/IssueStatusIcon.svelte
+++ b/plugins/tracker-resources/src/components/issues/IssueStatusIcon.svelte
@@ -14,11 +14,10 @@
 -->
 <script lang="ts">
   import core, { StatusCategory, WithLookup } from '@hcengineering/core'
-  import { createQuery, getClient } from '@hcengineering/presentation'
+  import { createQuery, getClient, statusStore } from '@hcengineering/presentation'
   import { IssueStatus } from '@hcengineering/tracker'
-  import { getPlatformColor, IconSize } from '@hcengineering/ui'
+  import { IconSize, getPlatformColor } from '@hcengineering/ui'
   import tracker from '../../plugin'
-  import { statusStore } from '@hcengineering/presentation'
   import StatusIcon from '../icons/StatusIcon.svelte'
 
   export let value: WithLookup<IssueStatus>
@@ -78,5 +77,5 @@
 </script>
 
 {#if icon !== undefined && color !== undefined && category !== undefined}
-  <StatusIcon {category} {size} fill={color} {statusIcon} />
+  <StatusIcon on:accent-color {category} {size} fill={color} {statusIcon} />
 {/if}
diff --git a/plugins/tracker-resources/src/components/issues/StatusPresenter.svelte b/plugins/tracker-resources/src/components/issues/StatusPresenter.svelte
index 3d9953448f..a61f8ee60e 100644
--- a/plugins/tracker-resources/src/components/issues/StatusPresenter.svelte
+++ b/plugins/tracker-resources/src/components/issues/StatusPresenter.svelte
@@ -27,7 +27,7 @@
 {#if value}
   <div class="flex-presenter cursor-default" style:color={'inherit'}>
     {#if !inline}
-      <IssueStatusIcon {value} {size} />
+      <IssueStatusIcon {value} {size} on:accent-color />
     {/if}
     <span
       class="overflow-label"
diff --git a/plugins/tracker-resources/src/components/issues/StatusRefPresenter.svelte b/plugins/tracker-resources/src/components/issues/StatusRefPresenter.svelte
index 8ebf78a56b..02697a1c05 100644
--- a/plugins/tracker-resources/src/components/issues/StatusRefPresenter.svelte
+++ b/plugins/tracker-resources/src/components/issues/StatusRefPresenter.svelte
@@ -31,5 +31,6 @@
     {kind}
     {colorInherit}
     {accent}
+    on:accent-color
   />
 {/if}
diff --git a/plugins/view-resources/src/components/list/ListHeader.svelte b/plugins/view-resources/src/components/list/ListHeader.svelte
index 1df59738b3..a8961547f1 100644
--- a/plugins/view-resources/src/components/list/ListHeader.svelte
+++ b/plugins/view-resources/src/components/list/ListHeader.svelte
@@ -13,55 +13,65 @@
 // limitations under the License.
 -->
 <script lang="ts">
+  import { Doc, Ref, Space } from '@hcengineering/core'
   import { IntlString } from '@hcengineering/platform'
   import ui, {
     ActionIcon,
     AnyComponent,
+    Button,
+    IconAdd,
+    IconCollapseArrow,
     IconMoreH,
     Label,
-    hsvToRGB,
-    IconCollapseArrow,
-    deviceOptionsStore as deviceInfo
+    deviceOptionsStore as deviceInfo,
+    eventToHTMLElement,
+    hslToRgb,
+    rgbToHsl,
+    showPopup
   } from '@hcengineering/ui'
-  import { createEventDispatcher } from 'svelte'
-  import { noCategory } from '../../viewOptions'
-  import view from '../../plugin'
-  import { Doc, Ref, Space } from '@hcengineering/core'
   import { AttributeModel } from '@hcengineering/view'
+  import { createEventDispatcher } from 'svelte'
+  import view from '../../plugin'
+  import { noCategory } from '../../viewOptions'
 
   export let groupByKey: string
   export let category: any
   export let headerComponent: AttributeModel | undefined
   export let space: Ref<Space> | undefined
-  export let createItemDialog: AnyComponent | undefined
-  export let createItemLabel: IntlString | undefined
   export let limited: number
   export let items: Doc[]
-  export let extraHeaders: AnyComponent[] | undefined
   export let flat = false
   export let collapsed = false
   export let lastCat = false
-  export let props: Record<string, any> = {}
   export let level: number
+
+  export let createItemDialog: AnyComponent | undefined
+  export let createItemLabel: IntlString | undefined
+  export let extraHeaders: AnyComponent[] | undefined
+  export let props: Record<string, any> = {}
   export let newObjectProps: (doc: Doc) => Record<string, any> | undefined
 
   const dispatch = createEventDispatcher()
 
-  // const handleCreateItem = (event: MouseEvent) => {
-  //   if (createItemDialog === undefined) return
-  //   showPopup(createItemDialog, newObjectProps(items[0]), eventToHTMLElement(event))
-  // }
-  const hue = Math.random()
   $: lth = $deviceInfo.theme === 'theme-light'
-  $: headerBGColor = lth ? hsvToRGB(hue, 0.15, 0.9) : hsvToRGB(hue, 0.15, 0.3)
-  $: headerTextColor = lth ? hsvToRGB(hue, 0.5, 0.5) : hsvToRGB(hue, 0.6, 0.95)
+
+  let accentColor = { h: 0, s: 0, l: 65 }
+
+  $: headerBGColor = !lth
+    ? hslToRgb(accentColor.h, accentColor.s, accentColor.l / 1.5 + (mouseOver ? -20 : 0))
+    : hslToRgb(accentColor.h, accentColor.s, accentColor.l * 1.5 + (mouseOver ? -20 : 0))
+
+  const handleCreateItem = (event: MouseEvent) => {
+    if (createItemDialog === undefined) return
+    showPopup(createItemDialog, newObjectProps(items[0]), eventToHTMLElement(event))
+  }
+  let mouseOver = false
 </script>
 
 {#if headerComponent || groupByKey === noCategory}
   <!-- svelte-ignore a11y-click-events-have-key-events -->
   <div
     style:z-index={10 - level}
-    style:--list-header-color={headerBGColor.rgb}
     style:--list-header-rgb-color={`${headerBGColor.r}, ${headerBGColor.g}, ${headerBGColor.b}`}
     class="flex-between categoryHeader row"
     class:gradient={!lth}
@@ -69,19 +79,30 @@
     class:collapsed
     class:subLevel={level !== 0}
     class:lastCat
+    on:focus={() => {
+      mouseOver = true
+    }}
+    on:mouseenter={() => {
+      mouseOver = true
+    }}
+    on:mouseover={() => {
+      mouseOver = true
+    }}
+    on:mouseleave={() => {
+      mouseOver = false
+    }}
     on:click={() => dispatch('collapse')}
   >
     <div class="flex-row-center clear-mins">
       {#if level === 0}
         <div class="chevron"><IconCollapseArrow size={'small'} /></div>
       {/if}
-      <!-- <FixedColumn key={`list_groupBy_${groupByKey}`} justify={'left'}> -->
       {#if groupByKey === noCategory}
-        <span style:color={headerTextColor.rgb} class="text-base fs-bold overflow-label pointer-events-none">
+        <span class="text-base fs-bold overflow-label pointer-events-none">
           <Label label={view.string.NoGrouping} />
         </span>
       {:else if headerComponent}
-        <span class="clear-mins" style:color={headerTextColor.rgb}>
+        <span class="clear-mins">
           <svelte:component
             this={headerComponent.presenter}
             value={category}
@@ -90,17 +111,12 @@
             kind={'list-header'}
             colorInherit={lth && level === 0}
             accent={level === 0}
+            on:accent-color={(evt) => {
+              accentColor = rgbToHsl(evt.detail.r, evt.detail.g, evt.detail.b)
+            }}
           />
         </span>
       {/if}
-      <!-- </FixedColumn> -->
-      <!-- {#if extraHeaders}
-        {#each extraHeaders as extra}
-          <FixedColumn key={`list_groupBy_${groupByKey}_extra_${extra}`} justify={'left'}>
-            <Component is={extra} props={{ ...props, value: category, docs: items }} />
-          </FixedColumn>
-        {/each}
-      {/if} -->
       {#if limited < items.length}
         <div class="antiSection-header__counter flex-row-center mx-2">
           <span class="caption-color">{limited}</span>
@@ -119,14 +135,16 @@
         <span class="antiSection-header__counter ml-2">{items.length}</span>
       {/if}
     </div>
-    <!-- {#if createItemDialog !== undefined && createItemLabel !== undefined}
-      <Button
-        icon={IconAdd}
-        kind={'transparent'}
-        showTooltip={{ label: createItemLabel }}
-        on:click={handleCreateItem}
-      />
-    {/if} -->
+    {#if createItemDialog !== undefined && createItemLabel !== undefined}
+      <div class:on-hover={!mouseOver}>
+        <Button
+          icon={IconAdd}
+          kind={'transparent'}
+          showTooltip={{ label: createItemLabel }}
+          on:click={handleCreateItem}
+        />
+      </div>
+    {/if}
   </div>
 {/if}
 
@@ -135,12 +153,16 @@
     position: relative;
     position: sticky;
     top: 0;
-    padding: 0 2.5rem 0 0.75rem;
+    padding: 0 0.75rem 0 0.75rem;
     height: 2.75rem;
     min-height: 2.75rem;
     min-width: 0;
     background: var(--theme-bg-color);
 
+    .on-hover {
+      visibility: hidden;
+    }
+
     .chevron {
       flex-shrink: 0;
       min-width: 0;
@@ -151,10 +173,14 @@
       transition: transform 0.15s ease-in-out;
     }
     &:not(.gradient)::before {
-      background: var(--list-header-color);
+      background: rgba(var(--list-header-rgb-color), 0.15);
     }
     &.gradient::before {
-      background: linear-gradient(90deg, var(--list-header-color), rgba(var(--list-header-rgb-color), 0.3));
+      background: linear-gradient(
+        90deg,
+        rgba(var(--list-header-rgb-color), 0.15),
+        rgba(var(--list-header-rgb-color), 0.05)
+      );
     }
     &::before {
       box-sizing: border-box;
@@ -187,7 +213,7 @@
       border-left: 1px solid var(--theme-list-border-color);
       border-right: 1px solid var(--theme-list-border-color);
       border-bottom: 1px solid var(--theme-list-subheader-divider);
-      // here shoul be top 3rem for sticky, but with ExpandCollapse it gives strange behavior
+      // here should be top 3rem for sticky, but with ExpandCollapse it gives strange behavior
 
       &::before {
         content: none;
@@ -206,8 +232,4 @@
       padding: 0 0.25rem 0 0.25rem;
     }
   }
-
-  // .row:not(:last-child) {
-  //   border-bottom: 1px solid var(--accent-bg-color);
-  // }
 </style>