634 lines
19 KiB
JavaScript
634 lines
19 KiB
JavaScript
/*jshint esversion: 6 */
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(function() {
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'use strict';
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class DomHelper {
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static isVisible(element) {
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return element.offsetParent !== null;
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}
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static openNewTab(url) {
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let win = window.open(url, "_blank");
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win.focus();
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}
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static scrollPageTo(element) {
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let windowScrollPosition = window.pageYOffset;
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let windowHeight = document.documentElement.clientHeight;
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let viewportPosition = windowScrollPosition + windowHeight;
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let itemBottomPosition = element.offsetTop + element.offsetHeight;
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if (viewportPosition - itemBottomPosition < 0 || viewportPosition - element.offsetTop > windowHeight) {
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window.scrollTo(0, element.offsetTop - 10);
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}
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}
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static getVisibleElements(selector) {
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let elements = document.querySelectorAll(selector);
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let result = [];
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for (let i = 0; i < elements.length; i++) {
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if (this.isVisible(elements[i])) {
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result.push(elements[i]);
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}
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}
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return result;
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}
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}
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class TouchHandler {
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constructor() {
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this.reset();
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}
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reset() {
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this.touch = {
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start: {x: -1, y: -1},
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move: {x: -1, y: -1},
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element: null
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};
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}
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calculateDistance() {
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if (this.touch.start.x >= -1 && this.touch.move.x >= -1) {
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let horizontalDistance = Math.abs(this.touch.move.x - this.touch.start.x);
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let verticalDistance = Math.abs(this.touch.move.y - this.touch.start.y);
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if (horizontalDistance > 30 && verticalDistance < 70) {
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return this.touch.move.x - this.touch.start.x;
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}
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}
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return 0;
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}
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findElement(element) {
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if (element.classList.contains("touch-item")) {
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return element;
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}
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for (; element && element !== document; element = element.parentNode) {
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if (element.classList.contains("touch-item")) {
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return element;
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}
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}
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return null;
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}
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onTouchStart(event) {
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if (event.touches === undefined || event.touches.length !== 1) {
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return;
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}
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this.reset();
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this.touch.start.x = event.touches[0].clientX;
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this.touch.start.y = event.touches[0].clientY;
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this.touch.element = this.findElement(event.touches[0].target);
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}
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onTouchMove(event) {
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if (event.touches === undefined || event.touches.length !== 1 || this.element === null) {
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return;
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}
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this.touch.move.x = event.touches[0].clientX;
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this.touch.move.y = event.touches[0].clientY;
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let distance = this.calculateDistance();
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let absDistance = Math.abs(distance);
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if (absDistance > 0) {
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let opacity = 1 - (absDistance > 75 ? 0.9 : absDistance / 75 * 0.9);
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let tx = distance > 75 ? 75 : (distance < -75 ? -75 : distance);
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this.touch.element.style.opacity = opacity;
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this.touch.element.style.transform = "translateX(" + tx + "px)";
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}
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}
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onTouchEnd(event) {
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if (event.touches === undefined) {
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return;
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}
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if (this.touch.element !== null) {
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let distance = Math.abs(this.calculateDistance());
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if (distance > 75) {
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EntryHandler.toggleEntryStatus(this.touch.element);
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this.touch.element.style.opacity = 1;
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this.touch.element.style.transform = "none";
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}
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}
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this.reset();
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}
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listen() {
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let elements = document.querySelectorAll(".touch-item");
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elements.forEach((element) => {
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element.addEventListener("touchstart", (e) => this.onTouchStart(e), false);
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element.addEventListener("touchmove", (e) => this.onTouchMove(e), false);
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element.addEventListener("touchend", (e) => this.onTouchEnd(e), false);
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element.addEventListener("touchcancel", () => this.reset(), false);
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});
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}
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}
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class KeyboardHandler {
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constructor() {
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this.queue = [];
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this.shortcuts = {};
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}
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on(combination, callback) {
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this.shortcuts[combination] = callback;
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}
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listen() {
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document.onkeydown = (event) => {
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if (this.isEventIgnored(event)) {
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return;
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}
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let key = this.getKey(event);
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this.queue.push(key);
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for (let combination in this.shortcuts) {
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let keys = combination.split(" ");
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if (keys.every((value, index) => value === this.queue[index])) {
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this.queue = [];
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this.shortcuts[combination]();
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return;
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}
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if (keys.length === 1 && key === keys[0]) {
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this.queue = [];
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this.shortcuts[combination]();
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return;
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}
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}
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if (this.queue.length >= 2) {
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this.queue = [];
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}
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};
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}
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isEventIgnored(event) {
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return event.target.tagName === "INPUT" || event.target.tagName === "TEXTAREA";
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}
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getKey(event) {
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const mapping = {
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'Esc': 'Escape',
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'Up': 'ArrowUp',
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'Down': 'ArrowDown',
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'Left': 'ArrowLeft',
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'Right': 'ArrowRight'
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};
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for (let key in mapping) {
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if (mapping.hasOwnProperty(key) && key === event.key) {
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return mapping[key];
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}
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}
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return event.key;
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}
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}
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class FormHandler {
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static handleSubmitButtons() {
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let elements = document.querySelectorAll("form");
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elements.forEach(function (element) {
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element.onsubmit = function () {
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let button = document.querySelector("button");
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if (button) {
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button.innerHTML = button.dataset.labelLoading;
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button.disabled = true;
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}
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};
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});
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}
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}
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class MouseHandler {
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onClick(selector, callback) {
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let elements = document.querySelectorAll(selector);
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elements.forEach((element) => {
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element.onclick = (event) => {
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event.preventDefault();
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callback(event);
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};
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});
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}
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}
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class RequestBuilder {
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constructor(url) {
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this.callback = null;
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this.url = url;
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this.options = {
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method: "POST",
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cache: "no-cache",
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credentials: "include",
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body: null,
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headers: new Headers({
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"Content-Type": "application/json",
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"X-Csrf-Token": this.getCsrfToken()
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})
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};
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}
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withBody(body) {
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this.options.body = JSON.stringify(body);
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return this;
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}
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withCallback(callback) {
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this.callback = callback;
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return this;
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}
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getCsrfToken() {
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let element = document.querySelector("meta[name=X-CSRF-Token]");
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if (element !== null) {
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return element.getAttribute("value");
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}
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return "";
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}
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execute() {
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fetch(new Request(this.url, this.options)).then((response) => {
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if (this.callback) {
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this.callback(response);
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}
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});
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}
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}
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class EntryHandler {
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static updateEntriesStatus(entryIDs, status, callback) {
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let url = document.body.dataset.entriesStatusUrl;
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let request = new RequestBuilder(url);
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request.withBody({entry_ids: entryIDs, status: status});
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request.withCallback(callback);
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request.execute();
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}
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static toggleEntryStatus(element) {
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let entryID = parseInt(element.dataset.id, 10);
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let statuses = {read: "unread", unread: "read"};
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for (let currentStatus in statuses) {
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let newStatus = statuses[currentStatus];
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if (element.classList.contains("item-status-" + currentStatus)) {
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element.classList.remove("item-status-" + currentStatus);
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element.classList.add("item-status-" + newStatus);
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this.updateEntriesStatus([entryID], newStatus);
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break;
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}
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}
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}
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static markEntryAsRead(element) {
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if (element.classList.contains("item-status-unread")) {
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element.classList.remove("item-status-unread");
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element.classList.add("item-status-read");
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let entryID = parseInt(element.dataset.id, 10);
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this.updateEntriesStatus([entryID], "read");
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}
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}
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static saveEntry(element) {
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if (element.dataset.completed) {
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return;
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}
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element.innerHTML = element.dataset.labelLoading;
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let request = new RequestBuilder(element.dataset.saveUrl);
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request.withCallback(() => {
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element.innerHTML = element.dataset.labelDone;
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element.dataset.completed = true;
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});
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request.execute();
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}
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static fetchOriginalContent(element) {
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if (element.dataset.completed) {
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return;
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}
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element.innerHTML = element.dataset.labelLoading;
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let request = new RequestBuilder(element.dataset.fetchContentUrl);
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request.withCallback((response) => {
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element.innerHTML = element.dataset.labelDone;
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element.dataset.completed = true;
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response.json().then((data) => {
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document.querySelector(".entry-content").innerHTML = data.content;
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});
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});
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request.execute();
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}
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}
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class ConfirmHandler {
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remove(url) {
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let request = new RequestBuilder(url);
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request.withCallback(() => window.location.reload());
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request.execute();
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}
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handle(event) {
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let questionElement = document.createElement("span");
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let linkElement = event.target;
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let containerElement = linkElement.parentNode;
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linkElement.style.display = "none";
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let yesElement = document.createElement("a");
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yesElement.href = "#";
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yesElement.appendChild(document.createTextNode(linkElement.dataset.labelYes));
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yesElement.onclick = (event) => {
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event.preventDefault();
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let loadingElement = document.createElement("span");
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loadingElement.className = "loading";
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loadingElement.appendChild(document.createTextNode(linkElement.dataset.labelLoading));
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questionElement.remove();
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containerElement.appendChild(loadingElement);
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this.remove(linkElement.dataset.url);
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};
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let noElement = document.createElement("a");
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noElement.href = "#";
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noElement.appendChild(document.createTextNode(linkElement.dataset.labelNo));
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noElement.onclick = (event) => {
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event.preventDefault();
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linkElement.style.display = "inline";
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questionElement.remove();
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};
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questionElement.className = "confirm";
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questionElement.appendChild(document.createTextNode(linkElement.dataset.labelQuestion + " "));
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questionElement.appendChild(yesElement);
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questionElement.appendChild(document.createTextNode(", "));
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questionElement.appendChild(noElement);
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containerElement.appendChild(questionElement);
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}
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}
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class MenuHandler {
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clickMenuListItem(event) {
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let element = event.target;
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if (element.tagName === "A") {
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window.location.href = element.getAttribute("href");
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} else {
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window.location.href = element.querySelector("a").getAttribute("href");
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}
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}
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toggleMainMenu() {
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let menu = document.querySelector(".header nav ul");
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if (DomHelper.isVisible(menu)) {
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menu.style.display = "none";
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} else {
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menu.style.display = "block";
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}
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}
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}
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class NavHandler {
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markPageAsRead() {
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let items = DomHelper.getVisibleElements(".items .item");
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let entryIDs = [];
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items.forEach((element) => {
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element.classList.add("item-status-read");
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entryIDs.push(parseInt(element.dataset.id, 10));
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});
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if (entryIDs.length > 0) {
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EntryHandler.updateEntriesStatus(entryIDs, "read", () => {
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// This callback make sure the Ajax request reach the server before we reload the page.
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this.goToPage("next", true);
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});
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}
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}
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saveEntry() {
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if (this.isListView()) {
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let currentItem = document.querySelector(".current-item");
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if (currentItem !== null) {
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let saveLink = currentItem.querySelector("a[data-save-entry]");
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if (saveLink) {
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EntryHandler.saveEntry(saveLink);
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}
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}
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} else {
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let saveLink = document.querySelector("a[data-save-entry]");
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if (saveLink) {
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EntryHandler.saveEntry(saveLink);
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}
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}
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}
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fetchOriginalContent() {
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if (! this.isListView()){
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let link = document.querySelector("a[data-fetch-content-entry]");
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if (link) {
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EntryHandler.fetchOriginalContent(link);
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}
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}
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}
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toggleEntryStatus() {
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let currentItem = document.querySelector(".current-item");
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if (currentItem !== null) {
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// The order is important here,
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// On the unread page, the read item will be hidden.
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this.goToNextListItem();
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EntryHandler.toggleEntryStatus(currentItem);
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}
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}
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openOriginalLink() {
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let entryLink = document.querySelector(".entry h1 a");
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if (entryLink !== null) {
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DomHelper.openNewTab(entryLink.getAttribute("href"));
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return;
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}
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let currentItemOriginalLink = document.querySelector(".current-item a[data-original-link]");
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if (currentItemOriginalLink !== null) {
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DomHelper.openNewTab(currentItemOriginalLink.getAttribute("href"));
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// Move to the next item and if we are on the unread page mark this item as read.
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let currentItem = document.querySelector(".current-item");
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this.goToNextListItem();
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EntryHandler.markEntryAsRead(currentItem);
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}
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}
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openSelectedItem() {
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let currentItemLink = document.querySelector(".current-item .item-title a");
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if (currentItemLink !== null) {
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window.location.href = currentItemLink.getAttribute("href");
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}
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}
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/**
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* @param {string} page Page to redirect to.
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* @param {boolean} fallbackSelf Refresh actual page if the page is not found.
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*/
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goToPage(page, fallbackSelf) {
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let element = document.querySelector("a[data-page=" + page + "]");
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if (element) {
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document.location.href = element.href;
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} else if (fallbackSelf) {
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window.location.reload();
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}
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}
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goToPrevious() {
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if (this.isListView()) {
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this.goToPreviousListItem();
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} else {
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this.goToPage("previous");
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}
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}
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goToNext() {
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if (this.isListView()) {
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this.goToNextListItem();
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} else {
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this.goToPage("next");
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}
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}
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goToPreviousListItem() {
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let items = DomHelper.getVisibleElements(".items .item");
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if (items.length === 0) {
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return;
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}
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if (document.querySelector(".current-item") === null) {
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items[0].classList.add("current-item");
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return;
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}
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for (let i = 0; i < items.length; i++) {
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if (items[i].classList.contains("current-item")) {
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items[i].classList.remove("current-item");
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if (i - 1 >= 0) {
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items[i - 1].classList.add("current-item");
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DomHelper.scrollPageTo(items[i - 1]);
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}
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break;
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}
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}
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}
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goToNextListItem() {
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let currentItem = document.querySelector(".current-item");
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let items = DomHelper.getVisibleElements(".items .item");
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if (items.length === 0) {
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return;
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}
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if (currentItem === null) {
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items[0].classList.add("current-item");
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return;
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}
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for (let i = 0; i < items.length; i++) {
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if (items[i].classList.contains("current-item")) {
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items[i].classList.remove("current-item");
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if (i + 1 < items.length) {
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items[i + 1].classList.add("current-item");
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DomHelper.scrollPageTo(items[i + 1]);
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}
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break;
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}
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}
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}
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isListView() {
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return document.querySelector(".items") !== null;
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}
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}
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document.addEventListener("DOMContentLoaded", function() {
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FormHandler.handleSubmitButtons();
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let touchHandler = new TouchHandler();
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touchHandler.listen();
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let navHandler = new NavHandler();
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let keyboardHandler = new KeyboardHandler();
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keyboardHandler.on("g u", () => navHandler.goToPage("unread"));
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keyboardHandler.on("g h", () => navHandler.goToPage("history"));
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keyboardHandler.on("g f", () => navHandler.goToPage("feeds"));
|
|
keyboardHandler.on("g c", () => navHandler.goToPage("categories"));
|
|
keyboardHandler.on("g s", () => navHandler.goToPage("settings"));
|
|
keyboardHandler.on("ArrowLeft", () => navHandler.goToPrevious());
|
|
keyboardHandler.on("ArrowRight", () => navHandler.goToNext());
|
|
keyboardHandler.on("j", () => navHandler.goToPrevious());
|
|
keyboardHandler.on("p", () => navHandler.goToPrevious());
|
|
keyboardHandler.on("k", () => navHandler.goToNext());
|
|
keyboardHandler.on("n", () => navHandler.goToNext());
|
|
keyboardHandler.on("h", () => navHandler.goToPage("previous"));
|
|
keyboardHandler.on("l", () => navHandler.goToPage("next"));
|
|
keyboardHandler.on("o", () => navHandler.openSelectedItem());
|
|
keyboardHandler.on("v", () => navHandler.openOriginalLink());
|
|
keyboardHandler.on("m", () => navHandler.toggleEntryStatus());
|
|
keyboardHandler.on("A", () => navHandler.markPageAsRead());
|
|
keyboardHandler.on("s", () => navHandler.saveEntry());
|
|
keyboardHandler.on("d", () => navHandler.fetchOriginalContent());
|
|
keyboardHandler.listen();
|
|
|
|
let mouseHandler = new MouseHandler();
|
|
mouseHandler.onClick("a[data-save-entry]", (event) => {
|
|
event.preventDefault();
|
|
EntryHandler.saveEntry(event.target);
|
|
});
|
|
|
|
mouseHandler.onClick("a[data-fetch-content-entry]", (event) => {
|
|
event.preventDefault();
|
|
EntryHandler.fetchOriginalContent(event.target);
|
|
});
|
|
|
|
mouseHandler.onClick("a[data-on-click=markPageAsRead]", () => navHandler.markPageAsRead());
|
|
mouseHandler.onClick("a[data-confirm]", (event) => {
|
|
(new ConfirmHandler()).handle(event);
|
|
});
|
|
|
|
if (document.documentElement.clientWidth < 600) {
|
|
let menuHandler = new MenuHandler();
|
|
mouseHandler.onClick(".logo", () => menuHandler.toggleMainMenu());
|
|
mouseHandler.onClick(".header nav li", (event) => menuHandler.clickMenuListItem(event));
|
|
}
|
|
});
|
|
|
|
})();
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