Fix fan more info state display (#15979)

src/data/fan.ts

@@ -9,6 +9,8 @@ import {
   HassEntityAttributeBase,
   HassEntityBase,
 } from "home-assistant-js-websocket";
+import { blankBeforePercent } from "../common/translations/blank_before_percent";
+import { FrontendLocaleData } from "./translation";
 
 export const enum FanEntityFeature {
   SET_SPEED = 1,
@@ -91,3 +93,15 @@ export function computeFanSpeedIcon(
     : [mdiFanSpeed1, mdiFanSpeed2, mdiFanSpeed3][index - 1];
 }
 export const FAN_SPEED_COUNT_MAX_FOR_BUTTONS = 4;
+
+export function computeFanSpeedStateDisplay(
+  stateObj: FanEntity,
+  locale: FrontendLocaleData,
+  speed?: number
+) {
+  const currentSpeed = speed ?? stateObj.attributes.percentage;
+
+  return currentSpeed
+    ? `${Math.round(currentSpeed)}${blankBeforePercent(locale)}%`
+    : "";
+}

src/dialogs/more-info/controls/more-info-fan.ts

@@ -22,11 +22,12 @@ import {
   computeAttributeNameDisplay,
   computeAttributeValueDisplay,
 } from "../../../common/entity/compute_attribute_display";
+import { computeStateDisplay } from "../../../common/entity/compute_state_display";
 import { supportsFeature } from "../../../common/entity/supports-feature";
-import { blankBeforePercent } from "../../../common/translations/blank_before_percent";
 import "../../../components/ha-attributes";
 import { UNAVAILABLE } from "../../../data/entity";
 import {
+  computeFanSpeedStateDisplay,
   computeFanSpeedCount,
   FanEntity,
   FanEntityFeature,
@@ -49,12 +50,16 @@ class MoreInfoFan extends LitElement {
 
   @state() public _presetMode?: string;
 
-  @state() private _selectedPercentage?: number;
+  @state() private _liveSpeed?: number;
 
-  private _percentageChanged(ev) {
+  private _speedSliderMoved(ev) {
     const value = (ev.detail as any).value;
     if (isNaN(value)) return;
-    this._selectedPercentage = value;
+    this._liveSpeed = value;
+  }
+
+  private _speedValueChanged() {
+    this._liveSpeed = undefined;
   }
 
   private _toggle = () => {
@@ -107,12 +112,35 @@ class MoreInfoFan extends LitElement {
   protected updated(changedProps: PropertyValues): void {
     if (changedProps.has("stateObj")) {
       this._presetMode = this.stateObj?.attributes.preset_mode;
-      this._selectedPercentage = this.stateObj?.attributes.percentage
-        ? Math.round(this.stateObj.attributes.percentage)
-        : undefined;
     }
   }
 
+  private get _stateOverride() {
+    const liveValue = this._liveSpeed;
+
+    const forcedState =
+      this._liveSpeed != null ? (this._liveSpeed ? "on" : "off") : undefined;
+
+    const stateDisplay = computeStateDisplay(
+      this.hass.localize,
+      this.stateObj!,
+      this.hass.locale,
+      this.hass.entities,
+      forcedState
+    );
+
+    const positionStateDisplay = computeFanSpeedStateDisplay(
+      this.stateObj!,
+      this.hass.locale,
+      liveValue
+    );
+
+    if (positionStateDisplay) {
+      return positionStateDisplay;
+    }
+    return stateDisplay;
+  }
+
   protected render() {
     if (!this.hass || !this.stateObj) {
       return nothing;
@@ -140,17 +168,11 @@ class MoreInfoFan extends LitElement {
       supportsSpeed &&
       computeFanSpeedCount(this.stateObj) > FAN_SPEED_COUNT_MAX_FOR_BUTTONS;
 
-    const stateOverride = this._selectedPercentage
-      ? `${Math.round(this._selectedPercentage)}${blankBeforePercent(
-          this.hass!.locale
-        )}%`
-      : undefined;
-
     return html`
       <ha-more-info-state-header
         .hass=${this.hass}
         .stateObj=${this.stateObj}
-        .stateOverride=${stateOverride}
+        .stateOverride=${this._stateOverride}
       ></ha-more-info-state-header>
       <div class="controls">
         ${
@@ -159,7 +181,8 @@ class MoreInfoFan extends LitElement {
                 <ha-more-info-fan-speed
                   .stateObj=${this.stateObj}
                   .hass=${this.hass}
-                  @slider-moved=${this._percentageChanged}
+                  @slider-moved=${this._speedSliderMoved}
+                  @value-changed=${this._speedValueChanged}
                 >
                 </ha-more-info-fan-speed>
               `

src/panels/lovelace/cards/hui-tile-card.ts

@@ -41,7 +41,7 @@ import {
   CoverEntity,
 } from "../../../data/cover";
 import { isUnavailableState } from "../../../data/entity";
-import { FanEntity } from "../../../data/fan";
+import { computeFanSpeedStateDisplay, FanEntity } from "../../../data/fan";
 import { LightEntity } from "../../../data/light";
 import { ActionHandlerEvent } from "../../../data/lovelace";
 import { SENSOR_DEVICE_CLASS_TIMESTAMP } from "../../../data/sensor";
@@ -215,9 +215,12 @@ export class HuiTileCard extends LitElement implements LovelaceCard {
     }
 
     if (domain === "fan" && stateActive(stateObj)) {
-      const speed = (stateObj as FanEntity).attributes.percentage;
+      const speedStateDisplay = computeFanSpeedStateDisplay(
-      if (speed) {
+        stateObj as FanEntity,
-        return `${Math.round(speed)}${blankBeforePercent(this.hass!.locale)}%`;
+        this.hass!.locale
+      );
+      if (speedStateDisplay) {
+        return speedStateDisplay;
       }
     }