redoc/lib/components/SideMenu/side-menu.js
2015-10-18 19:46:21 +03:00

133 lines
3.4 KiB
JavaScript

'use strict';
import {RedocComponent, BaseComponent} from '../base';
import {SchemaManager} from '../../utils/SchemaManager';
import {SideMenuCat} from '../SideMenuCat/side-menu-cat';
import {NgZone} from 'angular2/angular2';
const CHANGE = {
NEXT : 1,
BACK : -1,
INITIAL : 0
};
@RedocComponent({
selector: 'side-menu',
providers: [SchemaManager],
templateUrl: './lib/components/SideMenu/side-menu.html',
styleUrls: ['./lib/components/SideMenu/side-menu.css'],
directives: [SideMenuCat]
})
export class SideMenu extends BaseComponent {
constructor(schemaMgr, zone) {
super(schemaMgr);
this.zone = zone;
// for some reason constructor is not run inside zone
// as workaround running it manually
this.zone.run(() => {
this.bindScroll();
});
this.activeCatIdx = 0;
this.activeMethodIdx = 0;
this.prevOffsetY = null;
}
bindScroll() {
this.prevOffsetY = window.scrollY;
window.addEventListener('scroll', () => this.scrollHandler());
}
activateAndScroll(idx, methodIdx) {
this.activate(idx, methodIdx);
this.scrollToActive();
}
scrollToActive() {
window.scrollTo(0, this.getMethodEl().offsetTop);
}
activate(catIdx, methodIdx) {
let menu = this.data.menu;
menu[this.activeCatIdx].active = false;
menu[this.activeCatIdx].methods[this.activeMethodIdx].active = false;
this.activeCatIdx = catIdx;
this.activeMethodIdx = methodIdx;
menu[catIdx].active = true;
let currentItem = menu[catIdx].methods[methodIdx];
currentItem.active = true;
this.activeMethodPtr = currentItem.pointer;
}
_calcActiveIndexes(offset) {
let menu = this.data.menu;
let catCount = menu.length;
let catLength = menu[this.activeCatIdx].methods.length;
let resMethodIdx = this.activeMethodIdx + offset;
let resCatIdx = this.activeCatIdx;
if (resMethodIdx > catLength - 1) {
resCatIdx++;
resMethodIdx = 0;
}
if (resMethodIdx < 0) {
let prevCatIdx = --resCatIdx;
catLength = menu[Math.max(prevCatIdx, 0)].methods.length;
resMethodIdx = catLength - 1;
}
if (resCatIdx > catCount - 1) {
resCatIdx = catCount - 1;
resMethodIdx = catLength - 1;
}
if (resCatIdx < 0) {
resCatIdx = 0;
resMethodIdx = 0;
}
return [resCatIdx, resMethodIdx];
}
changeActive(offset = 1) {
let [catIdx, methodIdx] = this._calcActiveIndexes(offset);
this.activate(catIdx, methodIdx);
}
getMethodEl() {
let ptr = this.activeMethodPtr;
let tag = this.data.menu[this.activeCatIdx].name;
return document.querySelector(`[pointer="${ptr}"][tag="${tag}"]`);
}
scrollHandler() {
let isScrolledDown = (window.scrollY - this.prevOffsetY > 0);
this.prevOffsetY = window.scrollY;
var activeMethodHost = this.getMethodEl();
if (!activeMethodHost) return;
if(isScrolledDown && activeMethodHost.getBoundingClientRect().bottom <= 0 ) {
this.changeActive(CHANGE.NEXT);
return;
}
if(!isScrolledDown && activeMethodHost.getBoundingClientRect().top > 0 ) {
this.changeActive(CHANGE.BACK);
return;
}
}
prepareModel() {
this.data = {};
this.data.menu = Array.from(this.schemaMgr.buildMenuTree().entries()).map(
el => ({name: el[0], methods: el[1]})
);
}
init() {
this.changeActive(CHANGE.INITIAL);
}
}
SideMenu.parameters.push([NgZone]);