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menu.js
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menu.js
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'use strict'
const { TopLevelWindow, MenuItem, webContents } = require('electron')
const { sortMenuItems } = require('@electron/internal/browser/api/menu-utils')
const EventEmitter = require('events').EventEmitter
const v8Util = process.atomBinding('v8_util')
const bindings = process.atomBinding('menu')
const { Menu } = bindings
let applicationMenu = null
let groupIdIndex = 0
Object.setPrototypeOf(Menu.prototype, EventEmitter.prototype)
// Menu Delegate.
// This object should hold no reference to |Menu| to avoid cyclic reference.
const delegate = {
isCommandIdChecked: (menu, id) => menu.commandsMap[id] ? menu.commandsMap[id].checked : undefined,
isCommandIdEnabled: (menu, id) => menu.commandsMap[id] ? menu.commandsMap[id].enabled : undefined,
isCommandIdVisible: (menu, id) => menu.commandsMap[id] ? menu.commandsMap[id].visible : undefined,
getAcceleratorForCommandId: (menu, id, useDefaultAccelerator) => {
const command = menu.commandsMap[id]
if (!command) return
if (command.accelerator != null) return command.accelerator
if (useDefaultAccelerator) return command.getDefaultRoleAccelerator()
},
shouldRegisterAcceleratorForCommandId: (menu, id) => menu.commandsMap[id] ? menu.commandsMap[id].registerAccelerator : undefined,
executeCommand: (menu, event, id) => {
const command = menu.commandsMap[id]
if (!command) return
command.click(event, TopLevelWindow.getFocusedWindow(), webContents.getFocusedWebContents())
},
menuWillShow: (menu) => {
// Ensure radio groups have at least one menu item seleted
for (const id in menu.groupsMap) {
const found = menu.groupsMap[id].find(item => item.checked) || null
if (!found) v8Util.setHiddenValue(menu.groupsMap[id][0], 'checked', true)
}
}
}
/* Instance Methods */
Menu.prototype._init = function () {
this.commandsMap = {}
this.groupsMap = {}
this.items = []
this.delegate = delegate
}
Menu.prototype.popup = function (options = {}) {
if (options == null || typeof options !== 'object') {
throw new TypeError('Options must be an object')
}
let { window, x, y, positioningItem, callback } = options
// no callback passed
if (!callback || typeof callback !== 'function') callback = () => {}
// set defaults
if (typeof x !== 'number') x = -1
if (typeof y !== 'number') y = -1
if (typeof positioningItem !== 'number') positioningItem = -1
// find which window to use
const wins = TopLevelWindow.getAllWindows()
if (!wins || wins.indexOf(window) === -1) {
window = TopLevelWindow.getFocusedWindow()
if (!window && wins && wins.length > 0) {
window = wins[0]
}
if (!window) {
throw new Error(`Cannot open Menu without a TopLevelWindow present`)
}
}
this.popupAt(window, x, y, positioningItem, callback)
return { browserWindow: window, x, y, position: positioningItem }
}
Menu.prototype.closePopup = function (window) {
if (window instanceof TopLevelWindow) {
this.closePopupAt(window.id)
} else {
// Passing -1 (invalid) would make closePopupAt close the all menu runners
// belong to this menu.
this.closePopupAt(-1)
}
}
Menu.prototype.getMenuItemById = function (id) {
const items = this.items
let found = items.find(item => item.id === id) || null
for (let i = 0; !found && i < items.length; i++) {
if (items[i].submenu) {
found = items[i].submenu.getMenuItemById(id)
}
}
return found
}
Menu.prototype.append = function (item) {
return this.insert(this.getItemCount(), item)
}
Menu.prototype.insert = function (pos, item) {
if ((item ? item.constructor : void 0) !== MenuItem) {
throw new TypeError('Invalid item')
}
// insert item depending on its type
insertItemByType.call(this, item, pos)
// set item properties
if (item.sublabel) this.setSublabel(pos, item.sublabel)
if (item.icon) this.setIcon(pos, item.icon)
if (item.role) this.setRole(pos, item.role)
// Make menu accessable to items.
item.overrideReadOnlyProperty('menu', this)
// Remember the items.
this.items.splice(pos, 0, item)
this.commandsMap[item.commandId] = item
}
Menu.prototype._callMenuWillShow = function () {
if (this.delegate) this.delegate.menuWillShow(this)
this.items.forEach(item => {
if (item.submenu) item.submenu._callMenuWillShow()
})
}
/* Static Methods */
Menu.getApplicationMenu = () => applicationMenu
Menu.sendActionToFirstResponder = bindings.sendActionToFirstResponder
// set application menu with a preexisting menu
Menu.setApplicationMenu = function (menu) {
if (menu && menu.constructor !== Menu) {
throw new TypeError('Invalid menu')
}
applicationMenu = menu
v8Util.setHiddenValue(global, 'applicationMenuSet', true)
if (process.platform === 'darwin') {
if (!menu) return
menu._callMenuWillShow()
bindings.setApplicationMenu(menu)
} else {
const windows = TopLevelWindow.getAllWindows()
return windows.map(w => w.setMenu(menu))
}
}
Menu.buildFromTemplate = function (template) {
if (!Array.isArray(template)) {
throw new TypeError('Invalid template for Menu: Menu template must be an array')
}
if (!areValidTemplateItems(template)) {
throw new TypeError('Invalid template for MenuItem: must have at least one of label, role or type')
}
const filtered = removeExtraSeparators(template)
const sorted = sortTemplate(filtered)
const menu = new Menu()
sorted.forEach(item => {
if (item instanceof MenuItem) {
menu.append(item)
} else {
menu.append(new MenuItem(item))
}
})
return menu
}
/* Helper Functions */
// validate the template against having the wrong attribute
function areValidTemplateItems (template) {
return template.every(item =>
item != null &&
typeof item === 'object' &&
(item.hasOwnProperty('label') ||
item.hasOwnProperty('role') ||
item.type === 'separator'))
}
function sortTemplate (template) {
const sorted = sortMenuItems(template)
for (const id in sorted) {
const item = sorted[id]
if (Array.isArray(item.submenu)) {
item.submenu = sortTemplate(item.submenu)
}
}
return sorted
}
// Search between separators to find a radio menu item and return its group id
function generateGroupId (items, pos) {
if (pos > 0) {
for (let idx = pos - 1; idx >= 0; idx--) {
if (items[idx].type === 'radio') return items[idx].groupId
if (items[idx].type === 'separator') break
}
} else if (pos < items.length) {
for (let idx = pos; idx <= items.length - 1; idx++) {
if (items[idx].type === 'radio') return items[idx].groupId
if (items[idx].type === 'separator') break
}
}
groupIdIndex += 1
return groupIdIndex
}
function removeExtraSeparators (items) {
// fold adjacent separators together
let ret = items.filter((e, idx, arr) => {
if (e.visible === false) return true
return e.type !== 'separator' || idx === 0 || arr[idx - 1].type !== 'separator'
})
// remove edge separators
ret = ret.filter((e, idx, arr) => {
if (e.visible === false) return true
return e.type !== 'separator' || (idx !== 0 && idx !== arr.length - 1)
})
return ret
}
function insertItemByType (item, pos) {
const types = {
normal: () => this.insertItem(pos, item.commandId, item.label),
checkbox: () => this.insertCheckItem(pos, item.commandId, item.label),
separator: () => this.insertSeparator(pos),
submenu: () => this.insertSubMenu(pos, item.commandId, item.label, item.submenu),
radio: () => {
// Grouping radio menu items
item.overrideReadOnlyProperty('groupId', generateGroupId(this.items, pos))
if (this.groupsMap[item.groupId] == null) {
this.groupsMap[item.groupId] = []
}
this.groupsMap[item.groupId].push(item)
// Setting a radio menu item should flip other items in the group.
v8Util.setHiddenValue(item, 'checked', item.checked)
Object.defineProperty(item, 'checked', {
enumerable: true,
get: () => v8Util.getHiddenValue(item, 'checked'),
set: () => {
this.groupsMap[item.groupId].forEach(other => {
if (other !== item) v8Util.setHiddenValue(other, 'checked', false)
})
v8Util.setHiddenValue(item, 'checked', true)
}
})
this.insertRadioItem(pos, item.commandId, item.label, item.groupId)
}
}
types[item.type]()
}
module.exports = Menu