redoc/lib/services/menu.service.ts

152 lines
4.1 KiB
TypeScript

'use strict';
import { Injectable, EventEmitter } from '@angular/core';
import { ScrollService, INVIEW_POSITION } from './scroll.service';
import { Hash } from './hash.service';
import { SpecManager } from '../utils/SpecManager';
import { SchemaHelper } from './schema-helper.service';
const CHANGE = {
NEXT : 1,
BACK : -1,
INITIAL : 0
};
@Injectable()
export class MenuService {
changed: EventEmitter<any> = new EventEmitter();
categories: any;
activeCatIdx: number = 0;
activeMethodIdx: number = -1;
activeMethodPtr: string;
constructor(private hash:Hash, private scrollService:ScrollService, specMgr:SpecManager) {
this.hash = hash;
this.categories = SchemaHelper.buildMenuTree(specMgr.schema);
scrollService.scroll.subscribe((evt) => {
this.scrollUpdate(evt.isScrolledDown);
});
this.changeActive(CHANGE.INITIAL);
this.hash.changed.subscribe((hash) => {
this.hashScroll(hash);
});
}
scrollUpdate(isScrolledDown) {
let stable = false;
while(!stable) {
let $activeMethodHost = this.getCurrentMethodEl();
if (!$activeMethodHost) return;
var elementInViewPos = this.scrollService.getElementPos($activeMethodHost);
if(isScrolledDown && elementInViewPos === INVIEW_POSITION.BELLOW) {
stable = this.changeActive(CHANGE.NEXT);
continue;
}
if(!isScrolledDown && elementInViewPos === INVIEW_POSITION.ABOVE ) {
stable = this.changeActive(CHANGE.BACK);
continue;
}
stable = true;
}
}
getCurrentMethodEl() {
return this.getMethodElByPtr(this.activeMethodPtr,
this.categories[this.activeCatIdx].name);
}
getMethodElByPtr(ptr, tag) {
let selector = ptr ? `[pointer="${ptr}"][tag="${tag}"]` : `[tag="${tag}"]`;
return document.querySelector(selector);
}
getMethodElByOperId(operationId) {
let selector =`[operation-id="${operationId}"]`;
return document.querySelector(selector);
}
activate(catIdx, methodIdx) {
let menu = this.categories;
menu[this.activeCatIdx].active = false;
if (menu[this.activeCatIdx].methods.length) {
if (this.activeMethodIdx >= 0) {
menu[this.activeCatIdx].methods[this.activeMethodIdx].active = false;
}
}
this.activeCatIdx = catIdx;
this.activeMethodIdx = methodIdx;
menu[catIdx].active = true;
this.activeMethodPtr = null;
let currentItem;
if (menu[catIdx].methods.length && (methodIdx > -1)) {
currentItem = menu[catIdx].methods[methodIdx];
currentItem.active = true;
this.activeMethodPtr = currentItem.pointer;
}
this.changed.next({cat: menu[catIdx], item: currentItem});
}
_calcActiveIndexes(offset) {
let menu = this.categories;
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 = -1;
}
if (resMethodIdx < -1) {
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);
return (methodIdx === 0 && catIdx === 0);
}
scrollToActive() {
this.scrollService.scrollTo(this.getCurrentMethodEl());
}
hashScroll(hash) {
if (!hash) return;
let $el;
hash = hash.substr(1);
let namespace = hash.split('/')[0];
let ptr = decodeURIComponent(hash.substr(namespace.length + 1));
if (namespace === 'operation') {
$el = this.getMethodElByOperId(ptr);
} else if (namespace === 'tag') {
let tag = ptr.split('/')[0];
ptr = ptr.substr(tag.length);
$el = this.getMethodElByPtr(ptr, tag);
}
if ($el) this.scrollService.scrollTo($el);
}
}