|
| 1 | +/* |
| 2 | + Copyright (c) 2026 Harrison McCarty. |
| 3 | + Published under the standard MIT License. |
| 4 | + Full text available at: https://opensource.org/licenses/MIT |
| 5 | +*/ |
| 6 | + |
| 7 | +import { css, html } from "../../../base/web-components"; |
| 8 | +import { KCUIElement } from "../../../kc-ui/element"; |
| 9 | + |
| 10 | +export class KCContextMenuElement extends KCUIElement { |
| 11 | + static override styles = [ |
| 12 | + ...KCUIElement.styles, |
| 13 | + css` |
| 14 | + :host { |
| 15 | + position: fixed; |
| 16 | + z-index: 1000; |
| 17 | + display: none; |
| 18 | + } |
| 19 | +
|
| 20 | + :host([visible]) { |
| 21 | + display: block; |
| 22 | + } |
| 23 | +
|
| 24 | + .menu { |
| 25 | + background: var(--dropdown-bg); |
| 26 | + border-radius: 5px; |
| 27 | + overflow: hidden; |
| 28 | + min-width: 150px; |
| 29 | + max-width: 300px; |
| 30 | + box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3); |
| 31 | + } |
| 32 | +
|
| 33 | + .menu-item { |
| 34 | + display: block; |
| 35 | + padding: 0.4em 0.8em; |
| 36 | + cursor: pointer; |
| 37 | + color: var(--dropdown-fg); |
| 38 | + user-select: none; |
| 39 | + white-space: nowrap; |
| 40 | + overflow: hidden; |
| 41 | + text-overflow: ellipsis; |
| 42 | + } |
| 43 | +
|
| 44 | + .menu-item:hover { |
| 45 | + background: var(--dropdown-hover-bg); |
| 46 | + color: var(--dropdown-hover-fg); |
| 47 | + } |
| 48 | + `, |
| 49 | + ]; |
| 50 | + |
| 51 | + #items: Map<string, unknown> | null = null; |
| 52 | + #onSelect: ((value: unknown) => void) | null = null; |
| 53 | + #boundHandleOutsideClick: ((e: MouseEvent) => void) | null = null; |
| 54 | + #boundHandleDismiss: (() => void) | null = null; |
| 55 | + |
| 56 | + show<T>( |
| 57 | + screenX: number, |
| 58 | + screenY: number, |
| 59 | + items: Map<string, unknown>, |
| 60 | + onSelect: (value: T) => void, |
| 61 | + ) { |
| 62 | + this.#items = items; |
| 63 | + this.#onSelect = onSelect as (value: unknown) => void; |
| 64 | + |
| 65 | + this.style.left = `${screenX}px`; |
| 66 | + this.style.top = `${screenY}px`; |
| 67 | + |
| 68 | + this.setAttribute("visible", ""); |
| 69 | + |
| 70 | + requestAnimationFrame(() => { |
| 71 | + this.updateMenuItems(); |
| 72 | + this.adjustPosition(); |
| 73 | + this.setupDismissListeners(); |
| 74 | + }); |
| 75 | + } |
| 76 | + |
| 77 | + hide() { |
| 78 | + this.removeAttribute("visible"); |
| 79 | + this.#items = null; |
| 80 | + this.#onSelect = null; |
| 81 | + this.removeDismissListeners(); |
| 82 | + } |
| 83 | + |
| 84 | + private updateMenuItems() { |
| 85 | + const menu = this.shadowRoot?.querySelector(".menu"); |
| 86 | + if (!menu) return; |
| 87 | + |
| 88 | + menu.innerHTML = ""; |
| 89 | + this.#items?.forEach((item, name) => { |
| 90 | + const menuItem = document.createElement("div"); |
| 91 | + menuItem.className = "menu-item"; |
| 92 | + // menuItem.dataset["index"] = name; |
| 93 | + menuItem.textContent = name; |
| 94 | + menu.appendChild(menuItem); |
| 95 | + }); |
| 96 | + } |
| 97 | + |
| 98 | + private adjustPosition() { |
| 99 | + const rect = this.getBoundingClientRect(); |
| 100 | + const viewportWidth = window.innerWidth; |
| 101 | + const viewportHeight = window.innerHeight; |
| 102 | + |
| 103 | + let x = parseFloat(this.style.left); |
| 104 | + let y = parseFloat(this.style.top); |
| 105 | + |
| 106 | + if (x + rect.width > viewportWidth) { |
| 107 | + x = viewportWidth - rect.width - 10; |
| 108 | + } |
| 109 | + if (y + rect.height > viewportHeight) { |
| 110 | + y = viewportHeight - rect.height - 10; |
| 111 | + } |
| 112 | + |
| 113 | + this.style.left = `${Math.max(10, x)}px`; |
| 114 | + this.style.top = `${Math.max(10, y)}px`; |
| 115 | + } |
| 116 | + |
| 117 | + private setupDismissListeners() { |
| 118 | + // Dismiss context window on outside click, window resize, or scroll |
| 119 | + this.removeDismissListeners(); |
| 120 | + |
| 121 | + this.#boundHandleOutsideClick = (e: MouseEvent) => { |
| 122 | + const rect = this.getBoundingClientRect(); |
| 123 | + const isInside = |
| 124 | + e.clientX >= rect.left && |
| 125 | + e.clientX <= rect.right && |
| 126 | + e.clientY >= rect.top && |
| 127 | + e.clientY <= rect.bottom; |
| 128 | + |
| 129 | + if (!isInside) { |
| 130 | + this.hide(); |
| 131 | + } |
| 132 | + }; |
| 133 | + |
| 134 | + this.#boundHandleDismiss = () => this.hide(); |
| 135 | + |
| 136 | + setTimeout(() => { |
| 137 | + if (this.#boundHandleOutsideClick) { |
| 138 | + document.addEventListener( |
| 139 | + "pointerdown", |
| 140 | + this.#boundHandleOutsideClick, |
| 141 | + ); |
| 142 | + } |
| 143 | + |
| 144 | + if (this.#boundHandleDismiss) { |
| 145 | + window.addEventListener("resize", this.#boundHandleDismiss); |
| 146 | + window.addEventListener( |
| 147 | + "scroll", |
| 148 | + this.#boundHandleDismiss, |
| 149 | + true, |
| 150 | + ); |
| 151 | + } |
| 152 | + }, 100); |
| 153 | + } |
| 154 | + |
| 155 | + private removeDismissListeners() { |
| 156 | + if (this.#boundHandleOutsideClick) { |
| 157 | + document.removeEventListener( |
| 158 | + "pointerdown", |
| 159 | + this.#boundHandleOutsideClick, |
| 160 | + ); |
| 161 | + this.#boundHandleOutsideClick = null; |
| 162 | + } |
| 163 | + |
| 164 | + if (this.#boundHandleDismiss) { |
| 165 | + window.removeEventListener("resize", this.#boundHandleDismiss); |
| 166 | + window.removeEventListener( |
| 167 | + "scroll", |
| 168 | + this.#boundHandleDismiss, |
| 169 | + true, |
| 170 | + ); |
| 171 | + this.#boundHandleDismiss = null; |
| 172 | + } |
| 173 | + } |
| 174 | + |
| 175 | + override initialContentCallback() { |
| 176 | + super.initialContentCallback(); |
| 177 | + |
| 178 | + this.shadowRoot?.addEventListener("click", (e: Event) => { |
| 179 | + const target = e.target as HTMLElement; |
| 180 | + if (target.classList.contains("menu-item") && this.#items) { |
| 181 | + if (this.#onSelect) { |
| 182 | + this.#onSelect(this.#items.get(target.textContent ?? "")); |
| 183 | + } |
| 184 | + |
| 185 | + this.hide(); |
| 186 | + } |
| 187 | + }); |
| 188 | + } |
| 189 | + |
| 190 | + override render() { |
| 191 | + return html`<div class="menu"></div>`; |
| 192 | + } |
| 193 | +} |
| 194 | + |
| 195 | +window.customElements.define("kc-context-menu", KCContextMenuElement); |
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