143 lines
3.5 KiB
JavaScript
143 lines
3.5 KiB
JavaScript
/* jslint node: true */
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'use strict';
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var MenuView = require('./menu_view.js').MenuView;
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var ansi = require('./ansi_term.js');
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var strUtil = require('./string_util.js');
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var util = require('util');
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var assert = require('assert');
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exports.VerticalMenuView = VerticalMenuView;
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function VerticalMenuView(options) {
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options.cursor = options.cursor || 'hide';
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MenuView.call(this, options);
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var self = this;
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this.itemSpacing = 3; // :TODO: bring from options/configurable
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this.calculateDimens = function() {
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if(!self.dimens || !self.dimens.width) {
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var l = 0;
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self.items.forEach(function onItem(item) {
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if(item.text.length > l) {
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l = item.text.length;
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}
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});
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self.dimens = self.dimens || {};
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self.dimens.width = l;
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}
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if(this.items.length > 0) {
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this.dimens.height = (self.items.length * self.itemSpacing) - (self.itemSpacing - 1);
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} else {
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this.dimens.height = 0;
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}
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};
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this.calculateDimens();
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this.cachePositions = function() {
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if(self.positionCacheExpired) {
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var count = this.items.length;
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var x = self.position.x;
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for(var i = 0; i < count; ++i) {
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if(i > 0) {
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x += self.itemSpacing;
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}
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self.items[i].xPosition = x;
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}
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self.positionCacheExpired = false;
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}
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};
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this.changeSelection = function(fromIndex, toIndex) {
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assert(!self.positionCacheExpired);
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assert(fromIndex >= 0 && fromIndex <= self.items.length);
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assert(toIndex >= 0 && toIndex <= self.items.length);
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self.items[fromIndex].focused = false;
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self.drawItem(fromIndex);
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self.items[toIndex].focused = true;
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self.focusedItemIndex = toIndex;
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self.drawItem(toIndex);
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};
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this.drawItem = function(index) {
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assert(!this.positionCacheExpired);
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var item = self.items[index];
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if(!item) {
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return;
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}
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self.client.term.write(ansi.goto(item.xPosition, self.position.y));
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this.client.term.write(self.getANSIColor(
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index === self.focusedItemIndex ? self.getFocusColor() : self.getColor()));
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var text = strUtil.stylizeString(item.text, item.focused ? self.focusTextStyle : self.textStyle);
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self.client.term.write(
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strUtil.pad(text, this.dimens.width, this.fillChar, this.justify));
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};
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}
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util.inherits(VerticalMenuView, MenuView);
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VerticalMenuView.prototype.redraw = function() {
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VerticalMenuView.super_.prototype.redrawAllItems.call(this);
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};
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VerticalMenuView.prototype.setPosition = function(pos) {
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VerticalMenuView.super_.prototype.setPosition.call(this, pos);
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this.positionCacheExpired = true;
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};
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VerticalMenuView.prototype.setFocus = function(focused) {
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VerticalMenuView.super_.prototype.setFocus.call(this, focused);
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this.redraw();
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};
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VerticalMenuView.prototype.onSpecialKeyPress = function(keyName) {
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var prevFocusedItemIndex = this.focusedItemIndex;
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if(this.isSpecialKeyMapped('up', keyName)) {
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if(0 === this.focusedItemIndex) {
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this.focusedItemIndex = this.items.length - 1;
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} else {
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this.focusedItemIndex--;
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}
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} else if(this.isSpecialKeyMapped('down', keyName)) {
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if(this.items.length - 1 === this.focusedItemIndex) {
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this.focusedItemIndex = 0;
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} else {
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this.focusedItemIndex++;
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}
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}
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if(prevFocusedItemIndex !== this.focusedItemIndex) {
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this.changeSelection(prevFocusedItemIndex, this.focusedItemIndex);
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}
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VerticalMenuView.super_.prototype.onSpecialKeyPress.call(this, keyName);
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};
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VerticalMenuView.prototype.getData = function() {
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return this.focusedItemIndex;
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};
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VerticalMenuView.prototype.setItems = function(items) {
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VerticalMenuView.super_.prototype.setItems.call(this, items);
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this.positionCacheExpired = true;
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this.cachePositions();
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this.calculateDimens();
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}; |