Convert input-number to Lit/TS (#2792)

* Convert input-number to Lit/TS

Should I worry about width for the state display with slider?

* address review comments

* clientWidth not currently working
* unsure about the typing of _InputElement

* remove unused import

* get clientwidth

* added comment

src/panels/lovelace/entity-rows/hui-input-number-entity-row.ts

@@ -0,0 +1,162 @@
+import {
+  html,
+  LitElement,
+  TemplateResult,
+  property,
+  customElement,
+  css,
+  CSSResult,
+} from "lit-element";
+
+import "../components/hui-generic-entity-row";
+import "../../../components/ha-slider";
+import "../components/hui-warning";
+
+import { computeRTLDirection } from "../../../common/util/compute_rtl";
+import { EntityRow, EntityConfig } from "./types";
+import { HomeAssistant } from "../../../types";
+import { setValue } from "../../../data/input_text";
+
+@customElement("hui-input-number-entity-row")
+class HuiInputNumberEntityRow extends LitElement implements EntityRow {
+  @property() public hass?: HomeAssistant;
+  @property() private _config?: EntityConfig;
+  private _loaded?: boolean;
+  private _updated?: boolean;
+
+  public setConfig(config: EntityConfig): void {
+    if (!config) {
+      throw new Error("Configuration error");
+    }
+    this._config = config;
+  }
+
+  public connectedCallback(): void {
+    super.connectedCallback();
+    if (this._updated && !this._loaded) {
+      this._initialLoad();
+    }
+  }
+
+  protected firstUpdated(): void {
+    this._updated = true;
+    if (this.isConnected && !this._loaded) {
+      this._initialLoad();
+    }
+  }
+
+  protected render(): TemplateResult | void {
+    if (!this._config || !this.hass) {
+      return html``;
+    }
+
+    const stateObj = this.hass.states[this._config.entity];
+
+    if (!stateObj) {
+      return html`
+        <hui-warning
+          >${this.hass.localize(
+            "ui.panel.lovelace.warning.entity_not_found",
+            "entity",
+            this._config.entity
+          )}</hui-warning
+        >
+      `;
+    }
+
+    return html`
+      <hui-generic-entity-row .hass="${this.hass}" .config="${this._config}">
+        <div>
+          ${stateObj.attributes.mode === "slider"
+            ? html`
+                <div class="flex">
+                  <ha-slider
+                    .dir="${this._computeRTLDirection}"
+                    .step="${Number(stateObj.attributes.step)}"
+                    .min="${Number(stateObj.attributes.min)}"
+                    .max="${Number(stateObj.attributes.max)}"
+                    .value="${Number(stateObj.state)}"
+                    pin
+                    @change="${this._selectedValueChanged}"
+                    ignore-bar-touch
+                    id="input"
+                  ></ha-slider>
+                  <span class="state">
+                    ${Number(stateObj.state)}
+                    ${stateObj.attributes.unit_of_measurement}
+                  </span>
+                </div>
+              `
+            : html`
+                <paper-input
+                  no-label-float
+                  auto-validate
+                  .pattern="[0-9]+([\\.][0-9]+)?"
+                  .step="${Number(stateObj.attributes.step)}"
+                  .min="${Number(stateObj.attributes.min)}"
+                  .max="${Number(stateObj.attributes.max)}"
+                  .value="${Number(stateObj.state)}"
+                  type="number"
+                  @change="${this._selectedValueChanged}"
+                  id="input"
+                ></paper-input>
+              `}
+        </div>
+      </hui-generic-entity-row>
+    `;
+  }
+
+  static get styles(): CSSResult {
+    return css`
+      .flex {
+        display: flex;
+        align-items: center;
+      }
+      .state {
+        min-width: 45px;
+        text-align: center;
+      }
+      paper-input {
+        text-align: right;
+      }
+    `;
+  }
+
+  private async _initialLoad(): Promise<void> {
+    this._loaded = true;
+    await this.updateComplete;
+    const element = this.shadowRoot!.querySelector(".state") as HTMLElement;
+
+    if (!element || !this.parentElement) {
+      return;
+    }
+
+    element.hidden = this.parentElement.clientWidth <= 350;
+  }
+
+  private get _inputElement(): { value: string } {
+    // linter recommended the following syntax
+    return (this.shadowRoot!.getElementById("input") as unknown) as {
+      value: string;
+    };
+  }
+
+  private _selectedValueChanged(): void {
+    const element = this._inputElement;
+    const stateObj = this.hass!.states[this._config!.entity];
+
+    if (element.value !== stateObj.state) {
+      setValue(this.hass!, stateObj.entity_id, element.value!);
+    }
+  }
+
+  private _computeRTLDirection(): string {
+    return computeRTLDirection(this.hass!);
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    "hui-input-number-entity-row": HuiInputNumberEntityRow;
+  }
+}