enigma-bbs/core/menu_view.js

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/* jslint node: true */
'use strict';
var View = require('./view.js').View;
var ansi = require('./ansi_term.js');
var miscUtil = require('./misc_util.js');
var util = require('util');
var assert = require('assert');
exports.MenuView = MenuView;
function MenuView(client, options) {
options.acceptsFocus = miscUtil.valueWithDefault(options.acceptsFocus, true);
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options.acceptsInput = miscUtil.valueWithDefault(options.acceptsInput, true);
View.call(this, client, options);
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var self = this;
if(this.options.items) {
this.setItems(this.options.items);
} else {
this.items = [];
}
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this.focusedItemIndex = this.options.focusedItemIndex || 0;
this.focusedItemIndex = this.items.length >= this.focusedItemIndex ? this.focusedItemIndex : 0;
this.itemSpacing = this.options.itemSpacing || 1;
this.itemSpacing = parseInt(this.itemSpacing, 10);
this.focusPrefix = this.options.focusPrefix || '';
this.focusSuffix = this.options.focusSuffix || '';
this.fillChar = miscUtil.valueWithDefault(this.options.fillChar, ' ').substr(0, 1);
this.justify = this.options.justify || 'none';
this.moveSelection = function(fromIndex, toIndex) {
assert(!self.positionCacheExpired);
assert(fromIndex >= 0 && fromIndex <= self.items.length);
assert(toIndex >= 0 && toIndex <= self.items.length);
self.items[fromIndex].focused = false;
self.drawItem(fromIndex);
self.items[toIndex].focused = true;
self.focusedItemIndex = toIndex;
self.drawItem(toIndex);
};
/*
this.cachePositions = function() {
// :TODO: implement me!
};
this.drawItem = function(index) {
// :TODO: implement me!
};*/
}
util.inherits(MenuView, View);
MenuView.prototype.redraw = function() {
MenuView.super_.prototype.redraw.call(this);
this.cachePositions();
var count = this.items.length;
for(var i = 0; i < count; ++i) {
this.items[i].focused = this.focusedItemIndex === i;
this.drawItem(i);
}
};
MenuView.prototype.setItems = function(items) {
var self = this;
if(items) {
this.items = []; // :TODO: better way?
items.forEach(function onItem(itemText) {
self.items.push({
text : itemText,
selected : false,
});
});
}
};