enigma-bbs/core/menu_view.js

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/* jslint node: true */
'use strict';
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// ENiGMA½
const View = require('./view.js').View;
const miscUtil = require('./misc_util.js');
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// deps
const util = require('util');
const assert = require('assert');
const _ = require('lodash');
exports.MenuView = MenuView;
function MenuView(options) {
options.acceptsFocus = miscUtil.valueWithDefault(options.acceptsFocus, true);
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options.acceptsInput = miscUtil.valueWithDefault(options.acceptsInput, true);
View.call(this, options);
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const self = this;
if(options.items) {
this.setItems(options.items);
} else {
this.items = [];
}
this.caseInsensitiveHotKeys = miscUtil.valueWithDefault(options.caseInsensitiveHotKeys, true);
this.setHotKeys(options.hotKeys);
this.focusedItemIndex = options.focusedItemIndex || 0;
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this.focusedItemIndex = this.items.length >= this.focusedItemIndex ? this.focusedItemIndex : 0;
this.itemSpacing = _.isNumber(options.itemSpacing) ? options.itemSpacing : 0;
// :TODO: probably just replace this with owner draw / pipe codes / etc. more control, less specialization
this.focusPrefix = options.focusPrefix || '';
this.focusSuffix = options.focusSuffix || '';
this.fillChar = miscUtil.valueWithDefault(options.fillChar, ' ').substr(0, 1);
this.justify = options.justify || 'none';
this.hasFocusItems = function() {
return !_.isUndefined(self.focusItems);
};
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this.getHotKeyItemIndex = function(ch) {
if(ch && self.hotKeys) {
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const keyIndex = self.hotKeys[self.caseInsensitiveHotKeys ? ch.toLowerCase() : ch];
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if(_.isNumber(keyIndex)) {
return keyIndex;
}
}
return -1;
};
}
util.inherits(MenuView, View);
MenuView.prototype.setItems = function(items) {
if(items) {
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this.items = [];
items.forEach( itemText => {
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this.items.push( { text : itemText } );
});
}
};
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MenuView.prototype.getCount = function() {
return this.items.length;
};
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MenuView.prototype.getItems = function() {
return this.items.map( item => {
return item.text;
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});
};
MenuView.prototype.getItem = function(index) {
return this.items[index].text;
};
MenuView.prototype.focusNext = function() {
// nothing @ base currently
this.emit('index update', this.focusedItemIndex);
};
MenuView.prototype.focusPrevious = function() {
// nothign @ base currently
this.emit('index update', this.focusedItemIndex);
};
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MenuView.prototype.setFocusItemIndex = function(index) {
this.focusedItemIndex = index;
};
MenuView.prototype.onKeyPress = function(ch, key) {
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const itemIndex = this.getHotKeyItemIndex(ch);
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if(itemIndex >= 0) {
this.setFocusItemIndex(itemIndex);
if(true === this.hotKeySubmit) {
this.emit('action', 'accept');
}
}
MenuView.super_.prototype.onKeyPress.call(this, ch, key);
};
MenuView.prototype.setFocusItems = function(items) {
if(items) {
this.focusItems = [];
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items.forEach( itemText => {
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this.focusItems.push( { text : itemText } );
});
}
};
MenuView.prototype.setItemSpacing = function(itemSpacing) {
itemSpacing = parseInt(itemSpacing);
assert(_.isNumber(itemSpacing));
this.itemSpacing = itemSpacing;
this.positionCacheExpired = true;
};
MenuView.prototype.setPropertyValue = function(propName, value) {
switch(propName) {
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case 'itemSpacing' : this.setItemSpacing(value); break;
case 'items' : this.setItems(value); break;
case 'focusItems' : this.setFocusItems(value); break;
case 'hotKeys' : this.setHotKeys(value); break;
case 'hotKeySubmit' : this.hotKeySubmit = value; break;
}
MenuView.super_.prototype.setPropertyValue.call(this, propName, value);
};
MenuView.prototype.setHotKeys = function(hotKeys) {
if(_.isObject(hotKeys)) {
if(this.caseInsensitiveHotKeys) {
this.hotKeys = {};
for(var key in hotKeys) {
this.hotKeys[key.toLowerCase()] = hotKeys[key];
}
} else {
this.hotKeys = hotKeys;
}
}
};