yy-menu
Version:
A traditional menu system for web apps inspired by Electron
397 lines (372 loc) • 47.4 kB
JavaScript
const Config = require('./config');
const MenuItem = require('./menuItem');
const LocalAccelerator = require('./localAccelerator');
const html = require('./html');
let _application;
class Menu {
/**
* creates a menu bar
* @param {object} [options]
* @param {object} [options.styles] additional CSS styles for menu
*/
constructor(options) {
options = options || {};
this.div = document.createElement('div');
this.styles = options.styles;
this.children = [];
this.applyConfig(Config.MenuStyle);
this.div.tabIndex = -1;
}
/**
* append a MenuItem to the Menu
* @param {MenuItem} menuItem
*/
append(menuItem) {
if (menuItem.submenu) {
menuItem.submenu.menu = this;
}
menuItem.menu = this;
this.div.appendChild(menuItem.div);
if (menuItem.type !== 'separator') {
this.children.push(menuItem);
}
}
/**
* inserts a MenuItem into the Menu
* @param {number} pos
* @param {MenuItem} menuItem
*/
insert(pos, menuItem) {
if (pos >= this.div.childNodes.length) {
this.append(menuItem);
} else {
if (menuItem.submenu) {
menuItem.submenu.menu = this;
}
menuItem.menu = this;
this.div.insertBefore(menuItem.div, this.div.childNodes[pos]);
if (menuItem.type !== 'separator') {
this.children.splice(pos, 0, menuItem);
}
}
}
hide() {
let current = this.menu.showing;
while (current && current.submenu) {
current.div.style.backgroundColor = 'transparent';
current.submenu.div.remove();
let next = current.submenu.showing;
if (next) {
current.submenu.showing.div.style.backgroundColor = 'transparent';
current.submenu.showing = null;
}
current = next;
}
}
show(menuItem) {
Menu.LocalAccelerator.unregisterMenuShortcuts();
if (this.menu && this.menu.showing === menuItem) {
this.hide();
this.menu.showing = null;
this.div.remove();
this.menu.showAccelerators();
} else {
if (this.menu) {
if (this.menu.showing && this.menu.children.indexOf(menuItem) !== -1) {
this.hide();
}
this.menu.showing = menuItem;
this.menu.hideAccelerators();
}
const div = menuItem.div;
const parent = this.menu.div;
if (this.menu.applicationMenu) {
this.div.style.left = div.offsetLeft + 'px';
this.div.style.top = div.offsetTop + div.offsetHeight + 'px';
} else {
this.div.style.left = parent.offsetLeft + parent.offsetWidth - Config.Overlap + 'px';
this.div.style.top = parent.offsetTop + div.offsetTop - Config.Overlap + 'px';
}
this.attached = menuItem;
this.showAccelerators();
this.getApplicationDiv().appendChild(this.div);
let label = 0,
accelerator = 0,
arrow = 0,
checked = 0;
for (let child of this.children) {
child.check.style.width = 'auto';
child.label.style.width = 'auto';
child.accelerator.style.width = 'auto';
child.arrow.style.width = 'auto';
if (child.type === 'checkbox') {
checked = Config.MinimumColumnWidth;
}
if (child.submenu) {
arrow = Config.MinimumColumnWidth;
}
}
for (let child of this.children) {
const childLabel = child.label.offsetWidth * 2;
label = childLabel > label ? childLabel : label;
const childAccelerator = child.accelerator.offsetWidth;
accelerator = childAccelerator > accelerator ? childAccelerator : accelerator;
if (child.submenu) {
arrow = child.arrow.offsetWidth;
}
}
for (let child of this.children) {
child.check.style.width = checked + 'px';
child.label.style.width = label + 'px';
child.accelerator.style.width = accelerator + 'px';
child.arrow.style.width = arrow + 'px';
}
if (this.div.offsetLeft + this.div.offsetWidth > window.innerWidth) {
this.div.style.left = window.innerWidth - this.div.offsetWidth + 'px';
}
if (this.div.offsetTop + this.div.offsetHeight > window.innerHeight) {
this.div.style.top = window.innerHeight - this.div.offsetHeight + 'px';
}
_application.menu.div.focus();
}
}
applyConfig(base) {
const styles = {};
for (let style in base) {
styles[style] = base[style];
}
if (this.styles) {
for (let style in this.styles) {
styles[style] = this.styles[style];
}
}
for (let style in styles) {
this.div.style[style] = styles[style];
}
}
showAccelerators() {
for (let child of this.children) {
child.showShortcut();
if (child.type !== 'separator') {
const index = child.text.indexOf('&');
if (index !== -1) {
Menu.LocalAccelerator.registerMenuShortcut(child.text[index + 1], child);
}
}
}
if (!this.applicationMenu) {
Menu.LocalAccelerator.registerMenuSpecial(this);
}
}
hideAccelerators() {
for (let child of this.children) {
child.hideShortcut();
}
}
closeAll() {
Menu.LocalAccelerator.unregisterMenuShortcuts();
let application = _application.menu;
if (application.showing) {
let menu = application;
while (menu.showing) {
menu = menu.showing.submenu;
}
while (menu && !menu.applicationMenu) {
if (menu.showing) {
menu.showing.div.style.backgroundColor = 'transparent';
menu.showing = null;
}
menu.div.remove();
menu = menu.menu;
}
if (menu) {
menu.showing.div.style.background = 'transparent';
menu.showing = null;
menu.hideAccelerators();
}
}
}
getApplicationDiv() {
return _application;
}
/**
* move selector to the next child pane
* @param {string} direction (left or right)
* @private
*/
moveChild(direction) {
let index;
if (direction === 'left') {
const parent = this.selector.menu.menu;
index = parent.children.indexOf(parent.showing);
index--;
index = index < 0 ? parent.children.length - 1 : index;
parent.children[index].handleClick();
} else {
let parent = this.selector.menu.menu;
let selector = parent.showing;
while (!parent.applicationMenu) {
selector.handleClick();
selector.div.style.backgroundColor = 'transparent';
parent = parent.menu;
selector = parent.showing;
}
index = parent.children.indexOf(selector);
index++;
index = index === parent.children.length ? 0 : index;
parent.children[index].handleClick();
}
this.selector = null;
}
/**
* move selector right and left
* @param {MouseEvent} e
* @param {string} direction
* @private
*/
horizontalSelector(e, direction) {
if (direction === 'right') {
if (this.selector.submenu) {
this.selector.handleClick(e);
this.selector.submenu.selector = this.selector.submenu.children[0];
this.selector.submenu.selector.div.style.backgroundColor = Config.SelectedBackgroundStyle;
this.selector = null;
} else {
this.moveChild(direction);
}
} else if (direction === 'left') {
if (!this.selector.menu.menu.applicationMenu) {
this.selector.menu.attached.handleClick(e);
this.selector.menu.menu.selector = this.selector.menu.attached;
this.selector = null;
} else {
this.moveChild(direction);
}
}
e.stopPropagation();
e.preventDefault();
}
/**
* move the selector in the menu
* @param {KeyboardEvent} e
* @param {string} direction (left, right, up, down)
* @private
*/
move(e, direction) {
if (this.selector) {
this.selector.div.style.backgroundColor = 'transparent';
let index = this.children.indexOf(this.selector);
if (direction === 'down') {
index++;
index = index === this.children.length ? 0 : index;
} else if (direction === 'up') {
index--;
index = index < 0 ? this.children.length - 1 : index;
} else {
return this.horizontalSelector(e, direction);
}
this.selector = this.children[index];
} else {
if (direction === 'up') {
this.selector = this.children[this.children.length - 1];
} else {
this.selector = this.children[0];
}
}
this.selector.div.style.backgroundColor = Config.SelectedBackgroundStyle;
e.preventDefault();
e.stopPropagation();
}
/**
* click the selector with keyboard
* @private
*/
enter(e) {
if (this.selector) {
this.selector.handleClick(e);
e.preventDefault();
e.stopPropagation();
}
}
/**
* array containing the menu's items
* @property {MenuItems[]} items
* @readonly
*/
get items() {
return this.children;
}
/**
* show application menu accelerators when alt is pressed
* @private
*/
showApplicationAccelerators() {
this.hideAccelerators();
LocalAccelerator.registerAlt(() => {
if (!this.showing) {
this.showAccelerators();
}
}, () => {
this.hideAccelerators();
});
}
/**
* sets active application Menu (and removes any existing application menus)
* @param {Menu} menu
*/
static setApplicationMenu(menu) {
LocalAccelerator.init();
if (_application) {
_application.remove();
}
_application = html({ parent: document.body, styles: Config.ApplicationContainerStyle });
_application.menu = menu;
menu.applyConfig(Config.ApplicationMenuStyle);
for (let child of menu.children) {
child.applyConfig(Config.ApplicationMenuRowStyle);
if (child.arrow) {
child.arrow.style.display = 'none';
}
menu.div.appendChild(child.div);
}
_application.appendChild(menu.div);
menu.applicationMenu = true;
menu.div.tabIndex = -1;
// don't let menu bar focus unless windows are open (this fixes a focus bug)
menu.div.addEventListener('focus', () => {
if (!menu.showing) {
menu.div.blur();
}
});
// close all windows if menu is no longer the focus
menu.div.addEventListener('blur', () => {
if (menu.showing) {
menu.closeAll();
}
});
menu.showApplicationAccelerators();
}
/**
* localAccelerator definition
* @type {Accelerator}
*/
static get LocalAccelerator() {
return LocalAccelerator;
}
/**
* use this to change the default Config settings across all menus
* @type {Config}
*/
static get Config() {
return Config;
}
/**
* MenuItem definition
* @type {MenuItem}
*/
static get MenuItem() {
return MenuItem;
}
}
module.exports = Menu;
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Config =   require('./config')\r\nconst MenuItem = require('./menuItem')\r\nconst LocalAccelerator = require('./localAccelerator')\r\nconst html = require('./html')\r\n\r\nlet _application\r\n\r\nclass Menu\r\n{\r\n    /**\r\n     * creates a menu bar\r\n     * @param {object} [options]\r\n     * @param {object} [options.styles] additional CSS styles for menu\r\n     */\r\n    constructor(options)\r\n    {\r\n        options = options || {}\r\n        this.div = document.createElement('div')\r\n        this.styles = options.styles\r\n        this.children = []\r\n        this.applyConfig(Config.MenuStyle)\r\n        this.div.tabIndex = -1\r\n    }\r\n\r\n    /**\r\n     * append a MenuItem to the Menu\r\n     * @param {MenuItem} menuItem\r\n     */\r\n    append(menuItem)\r\n    {\r\n        if (menuItem.submenu)\r\n        {\r\n            menuItem.submenu.menu = this\r\n        }\r\n        menuItem.menu = this\r\n        this.div.appendChild(menuItem.div)\r\n        if (menuItem.type !== 'separator')\r\n        {\r\n            this.children.push(menuItem)\r\n        }\r\n    }\r\n\r\n    /**\r\n     * inserts a MenuItem into the Menu\r\n     * @param {number} pos\r\n     * @param {MenuItem} menuItem\r\n     */\r\n    insert(pos, menuItem)\r\n    {\r\n        if (pos >= this.div.childNodes.length)\r\n        {\r\n            this.append(menuItem)\r\n        }\r\n        else\r\n        {\r\n            if (menuItem.submenu)\r\n            {\r\n                menuItem.submenu.menu = this\r\n            }\r\n            menuItem.menu = this\r\n            this.div.insertBefore(menuItem.div, this.div.childNodes[pos])\r\n            if (menuItem.type !== 'separator')\r\n            {\r\n                this.children.splice(pos, 0, menuItem)\r\n            }\r\n        }\r\n    }\r\n\r\n    hide()\r\n    {\r\n        let current = this.menu.showing\r\n        while (current && current.submenu)\r\n        {\r\n            current.div.style.backgroundColor = 'transparent'\r\n            current.submenu.div.remove()\r\n            let next = current.submenu.showing\r\n            if (next)\r\n            {\r\n                current.submenu.showing.div.style.backgroundColor = 'transparent'\r\n                current.submenu.showing = null\r\n            }\r\n            current = next\r\n        }\r\n    }\r\n\r\n    show(menuItem)\r\n    {\r\n        Menu.LocalAccelerator.unregisterMenuShortcuts()\r\n        if (this.menu && this.menu.showing === menuItem)\r\n        {\r\n            this.hide()\r\n            this.menu.showing = null\r\n            this.div.remove()\r\n            this.menu.showAccelerators()\r\n        }\r\n        else\r\n        {\r\n            if (this.menu)\r\n            {\r\n                if (this.menu.showing && this.menu.children.indexOf(menuItem) !== -1)\r\n                {\r\n                    this.hide()\r\n                }\r\n                this.menu.showing = menuItem\r\n                this.menu.hideAccelerators()\r\n            }\r\n            const div = menuItem.div\r\n            const parent = this.menu.div\r\n            if (this.menu.applicationMenu)\r\n            {\r\n                this.div.style.left = div.offsetLeft + 'px'\r\n                this.div.style.top = div.offsetTop + div.offsetHeight + 'px'\r\n            }\r\n            else\r\n            {\r\n                this.div.style.left = parent.offsetLeft + parent.offsetWidth - Config.Overlap + 'px'\r\n                this.div.style.top = parent.offsetTop + div.offsetTop - Config.Overlap + 'px'\r\n            }\r\n            this.attached = menuItem\r\n            this.showAccelerators()\r\n            this.getApplicationDiv().appendChild(this.div)\r\n            let label = 0, accelerator = 0, arrow = 0, checked = 0\r\n            for (let child of this.children)\r\n            {\r\n                child.check.style.width = 'auto'\r\n                child.label.style.width = 'auto'\r\n                child.accelerator.style.width = 'auto'\r\n                child.arrow.style.width = 'auto'\r\n                if (child.type === 'checkbox')\r\n                {\r\n                    checked = Config.MinimumColumnWidth\r\n                }\r\n                if (child.submenu)\r\n                {\r\n                    arrow = Config.MinimumColumnWidth\r\n                }\r\n            }\r\n            for (let child of this.children)\r\n            {\r\n                const childLabel = child.label.offsetWidth * 2\r\n                label = childLabel > label ? childLabel : label\r\n                const childAccelerator = child.accelerator.offsetWidth\r\n                accelerator = childAccelerator > accelerator ? childAccelerator : accelerator\r\n                if (child.submenu)\r\n                {\r\n                    arrow = child.arrow.offsetWidth\r\n                }\r\n            }\r\n            for (let child of this.children)\r\n            {\r\n                child.check.style.width = checked + 'px'\r\n                child.label.style.width = label + 'px'\r\n                child.accelerator.style.width = accelerator + 'px'\r\n                child.arrow.style.width = arrow + 'px'\r\n            }\r\n            if (this.div.offsetLeft + this.div.offsetWidth > window.innerWidth)\r\n            {\r\n                this.div.style.left = window.innerWidth - this.div.offsetWidth + 'px'\r\n            }\r\n            if (this.div.offsetTop + this.div.offsetHeight > window.innerHeight)\r\n            {\r\n                this.div.style.top = window.innerHeight - this.div.offsetHeight + 'px'\r\n            }\r\n            _application.menu.div.focus()\r\n        }\r\n    }\r\n\r\n    applyConfig(base)\r\n    {\r\n        const styles = {}\r\n        for (let style in base)\r\n        {\r\n            styles[style] = base[style]\r\n        }\r\n        if (this.styles)\r\n        {\r\n            for (let style in this.styles)\r\n            {\r\n                styles[style] = this.styles[style]\r\n            }\r\n        }\r\n        for (let style in styles)\r\n        {\r\n            this.div.style[style] = styles[style]\r\n        }\r\n    }\r\n\r\n    showAccelerators()\r\n    {\r\n        for (let child of this.children)\r\n        {\r\n            child.showShortcut()\r\n            if (child.type !== 'separator')\r\n            {\r\n                const index = child.text.indexOf('&')\r\n                if (index !== -1)\r\n                {\r\n                    Menu.LocalAccelerator.registerMenuShortcut(child.text[index + 1], child)\r\n                }\r\n            }\r\n        }\r\n        if (!this.applicationMenu)\r\n        {\r\n            Menu.LocalAccelerator.registerMenuSpecial(this)\r\n        }\r\n    }\r\n\r\n    hideAccelerators()\r\n    {\r\n        for (let child of this.children)\r\n        {\r\n            child.hideShortcut()\r\n        }\r\n    }\r\n\r\n    closeAll()\r\n    {\r\n        Menu.LocalAccelerator.unregisterMenuShortcuts()\r\n        let application = _application.menu\r\n        if (application.showing)\r\n        {\r\n            let menu = application\r\n            while (menu.showing)\r\n            {\r\n                menu = menu.showing.submenu\r\n            }\r\n            while (menu && !menu.applicationMenu)\r\n            {\r\n                if (menu.showing)\r\n                {\r\n                    menu.showing.div.style.backgroundColor = 'transparent'\r\n                    menu.showing = null\r\n                }\r\n                menu.div.remove()\r\n                menu = menu.menu\r\n            }\r\n            if (menu)\r\n            {\r\n                menu.showing.div.style.background = 'transparent'\r\n                menu.showing = null\r\n                menu.hideAccelerators()\r\n            }\r\n        }\r\n    }\r\n\r\n    getApplicationDiv()\r\n    {\r\n        return _application\r\n    }\r\n\r\n    /**\r\n     * move selector to the next child pane\r\n     * @param {string} direction (left or right)\r\n     * @private\r\n     */\r\n    moveChild(direction)\r\n    {\r\n        let index\r\n        if (direction === 'left')\r\n        {\r\n            const parent = this.selector.menu.menu\r\n            index = parent.children.indexOf(parent.showing)\r\n            index--\r\n            index = (index < 0) ? parent.children.length - 1 : index\r\n            parent.children[index].handleClick()\r\n        }\r\n        else\r\n        {\r\n            let parent = this.selector.menu.menu\r\n            let selector = parent.showing\r\n            while (!parent.applicationMenu)\r\n            {\r\n                selector.handleClick()\r\n                selector.div.style.backgroundColor = 'transparent'\r\n                parent = parent.menu\r\n                selector = parent.showing\r\n            }\r\n            index = parent.children.indexOf(selector)\r\n            index++\r\n            index = (index === parent.children.length) ? 0 : index\r\n            parent.children[index].handleClick()\r\n        }\r\n        this.selector = null\r\n    }\r\n\r\n    /**\r\n     * move selector right and left\r\n     * @param {MouseEvent} e\r\n     * @param {string} direction\r\n     * @private\r\n     */\r\n    horizontalSelector(e, direction)\r\n    {\r\n        if (direction === 'right')\r\n        {\r\n            if (this.selector.submenu)\r\n            {\r\n                this.selector.handleClick(e)\r\n                this.selector.submenu.selector = this.selector.submenu.children[0]\r\n                this.selector.submenu.selector.div.style.backgroundColor = Config.SelectedBackgroundStyle\r\n                this.selector = null\r\n            }\r\n            else\r\n            {\r\n                this.moveChild(direction)\r\n            }\r\n        }\r\n        else if (direction === 'left')\r\n        {\r\n            if (!this.selector.menu.menu.applicationMenu)\r\n            {\r\n                this.selector.menu.attached.handleClick(e)\r\n                this.selector.menu.menu.selector = this.selector.menu.attached\r\n                this.selector = null\r\n            }\r\n            else\r\n            {\r\n                this.moveChild(direction)\r\n            }\r\n        }\r\n        e.stopPropagation()\r\n        e.preventDefault()\r\n    }\r\n\r\n    /**\r\n     * move the selector in the menu\r\n     * @param {KeyboardEvent} e\r\n     * @param {string} direction (left, right, up, down)\r\n     * @private\r\n     */\r\n    move(e, direction)\r\n    {\r\n        if (this.selector)\r\n        {\r\n            this.selector.div.style.backgroundColor = 'transparent'\r\n            let index = this.children.indexOf(this.selector)\r\n            if (direction === 'down')\r\n            {\r\n                index++\r\n                index = (index === this.children.length) ? 0 : index\r\n            }\r\n            else if (direction === 'up')\r\n            {\r\n                index--\r\n                index = (index < 0) ? this.children.length - 1 : index\r\n            }\r\n            else\r\n            {\r\n                return this.horizontalSelector(e, direction)\r\n            }\r\n            this.selector = this.children[index]\r\n        }\r\n        else\r\n        {\r\n            if (direction === 'up')\r\n            {\r\n                this.selector = this.children[this.children.length - 1]\r\n            }\r\n            else\r\n            {\r\n                this.selector = this.children[0]\r\n            }\r\n        }\r\n        this.selector.div.style.backgroundColor = Config.SelectedBackgroundStyle\r\n        e.preventDefault()\r\n        e.stopPropagation()\r\n    }\r\n\r\n    /**\r\n     * click the selector with keyboard\r\n     * @private\r\n     */\r\n    enter(e)\r\n    {\r\n        if (this.selector)\r\n        {\r\n            this.selector.handleClick(e)\r\n            e.preventDefault()\r\n            e.stopPropagation()\r\n        }\r\n    }\r\n\r\n    /**\r\n     * array containing the menu's items\r\n     * @property {MenuItems[]} items\r\n     * @readonly\r\n     */\r\n    get items()\r\n    {\r\n        return this.children\r\n    }\r\n\r\n    /**\r\n     * show application menu accelerators when alt is pressed\r\n     * @private\r\n     */\r\n    showApplicationAccelerators()\r\n    {\r\n        this.hideAccelerators()\r\n        LocalAccelerator.registerAlt(() =>\r\n        {\r\n            if (!this.showing)\r\n            {\r\n                this.showAccelerators()\r\n            }\r\n        }, () =>\r\n        {\r\n            this.hideAccelerators()\r\n        })\r\n    }\r\n\r\n    /**\r\n     * sets active application Menu (and removes any existing application menus)\r\n     * @param {Menu} menu\r\n     */\r\n    static setApplicationMenu(menu)\r\n    {\r\n        LocalAccelerator.init()\r\n        if (_application)\r\n        {\r\n            _application.remove()\r\n        }\r\n        _application = html({ parent: document.body, styles: Config.ApplicationContainerStyle })\r\n        _application.menu = menu\r\n        menu.applyConfig(Config.ApplicationMenuStyle)\r\n        for (let child of menu.children)\r\n        {\r\n            child.applyConfig(Config.ApplicationMenuRowStyle)\r\n            if (child.arrow)\r\n            {\r\n                child.arrow.style.display = 'none'\r\n            }\r\n            menu.div.appendChild(child.div)\r\n        }\r\n\r\n        _application.appendChild(menu.div)\r\n        menu.applicationMenu = true\r\n        menu.div.tabIndex = -1\r\n\r\n        // don't let menu bar focus unless windows are open (this fixes a focus bug)\r\n        menu.div.addEventListener('focus', () =>\r\n        {\r\n            if (!menu.showing)\r\n            {\r\n                menu.div.blur()\r\n            }\r\n        })\r\n\r\n        // close all windows if menu is no longer the focus\r\n        menu.div.addEventListener('blur', () =>\r\n        {\r\n            if (menu.showing)\r\n            {\r\n                menu.closeAll()\r\n            }\r\n        })\r\n        menu.showApplicationAccelerators()\r\n    }\r\n\r\n    /**\r\n     * localAccelerator definition\r\n     * @type {Accelerator}\r\n     */\r\n    static get LocalAccelerator()\r\n    {\r\n        return LocalAccelerator\r\n    }\r\n\r\n    /**\r\n     * use this to change the default Config settings across all menus\r\n     * @type {Config}\r\n     */\r\n    static get Config()\r\n    {\r\n        return Config\r\n    }\r\n\r\n    /**\r\n     * MenuItem definition\r\n     * @type {MenuItem}\r\n     */\r\n    static get MenuItem()\r\n    {\r\n        return MenuItem\r\n    }\r\n}\r\n\r\nmodule.exports = Menu"]}