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Clear out old items before drawing new

This commit is contained in:
Bryan Ashby 2016-07-02 23:09:27 -06:00
parent 1b0891b0c3
commit a5fafc25ae
1 changed files with 40 additions and 20 deletions
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58
core/vertical_menu_view.js
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@ -1,15 +1,14 @@
/* jslint node: true */ /* jslint node: true */
'use strict'; 'use strict';
var MenuView = require('./menu_view.js').MenuView; // ENiGMA½
var ansi = require('./ansi_term.js'); const MenuView = require('./menu_view.js').MenuView;
var strUtil = require('./string_util.js'); const ansi = require('./ansi_term.js');
var miscUtil = require('./misc_util.js'); const strUtil = require('./string_util.js');
var colorCodes = require('./color_codes.js'); const colorCodes = require('./color_codes.js');
var util = require('util'); // deps
var assert = require('assert'); const util = require('util');
var _ = require('lodash');
exports.VerticalMenuView = VerticalMenuView; exports.VerticalMenuView = VerticalMenuView;
@ -19,7 +18,7 @@ function VerticalMenuView(options) {
MenuView.call(this, options); MenuView.call(this, options);
var self = this; const self = this;
this.performAutoScale = function() { this.performAutoScale = function() {
if(this.autoScale.height) { if(this.autoScale.height) {
@ -28,13 +27,13 @@ function VerticalMenuView(options) {
} }
if(self.autoScale.width) { if(self.autoScale.width) {
var l = 0; let maxLen = 0;
self.items.forEach(function item(i) { self.items.forEach( item => {
if(i.text.length > l) { if(item.text.length > maxLen) {
l = Math.min(i.text.length, self.client.term.termWidth - self.position.col); maxLen = Math.min(item.text.length, self.client.term.termWidth - self.position.col);
} }
}); });
self.dimens.width = l + 1; self.dimens.width = maxLen + 1;
} }
}; };
@ -66,14 +65,14 @@ function VerticalMenuView(options) {
*/ */
this.drawItem = function(index) { this.drawItem = function(index) {
var item = self.items[index]; const item = self.items[index];
if(!item) { if(!item) {
return; return;
} }
var focusItem; let focusItem;
var text; let text;
if(self.hasFocusItems()) { if(self.hasFocusItems()) {
focusItem = self.focusItems[index]; focusItem = self.focusItems[index];
@ -119,8 +118,24 @@ VerticalMenuView.prototype.redraw = function() {
this.positionCacheExpired = false; this.positionCacheExpired = false;
} }
var row = this.position.row; // erase old items
for(var i = this.viewWindow.top; i <= this.viewWindow.bottom; ++i) { // :TODO: optimize this: only needed if a item is removed or new max width < old.
if(this.oldDimens) {
const blank = new Array(Math.max(this.oldDimens.width, this.dimens.width)).join(' ');
let seq = ansi.goto(this.position.row, this.position.col) + this.getSGR() + blank;
let row = this.position.row + 1;
const endRow = (row + this.oldDimens.height) - 2;
while(row < endRow) {
seq += ansi.goto(row, this.position.col) + blank;
row += 1;
}
this.client.term.write(seq);
delete this.oldDimens;
}
let row = this.position.row;
for(let i = this.viewWindow.top; i <= this.viewWindow.bottom; ++i) {
this.items[i].row = row; this.items[i].row = row;
row += this.itemSpacing + 1; row += this.itemSpacing + 1;
this.items[i].focused = this.focusedItemIndex === i; this.items[i].focused = this.focusedItemIndex === i;
@ -181,6 +196,11 @@ VerticalMenuView.prototype.getData = function() {
}; };
VerticalMenuView.prototype.setItems = function(items) { VerticalMenuView.prototype.setItems = function(items) {
// if we have items already, save off their drawing area so we don't leave fragments at redraw
if(this.items && this.items.length) {
this.oldDimens = this.dimens;
}
VerticalMenuView.super_.prototype.setItems.call(this, items); VerticalMenuView.super_.prototype.setItems.call(this, items);
this.positionCacheExpired = true; this.positionCacheExpired = true;