mirror of
https://git.lolcat.ca/lolcat/4get.git
synced 2024-12-24 23:56:34 -05:00
698 lines
13 KiB
JavaScript
698 lines
13 KiB
JavaScript
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/*
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Global functions
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*/
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function htmlspecialchars(str){
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var map = {
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'&': '&',
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'<': '<',
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'>': '>',
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'"': '"',
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"'": '''
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}
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return str.replace(/[&<>"']/g, function(m){return map[m];});
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}
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function htmlspecialchars_decode(str){
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var map = {
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'&': '&',
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'<': '<',
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'>': '>',
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'"': '"',
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''': "'"
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}
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return str.replace(/&|<|>|"|'/g, function(m){return map[m];});
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}
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function is_click_within(elem, classname, is_id = false){
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while(true){
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if(elem === null){
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return false;
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}
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if(
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(
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is_id === false &&
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elem.className == classname
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) ||
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(
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is_id === true &&
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elem.id == classname
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)
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){
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return elem;
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}
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elem = elem.parentElement;
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}
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}
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/*
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Prevent GET parameter pollution
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*/
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var form = document.getElementsByTagName("form");
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if(
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form.length !== 0 &&
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window.location.pathname != "/" &&
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window.location.pathname != "/settings.php" &&
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window.location.pathname != "/settings"
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){
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form = form[0];
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var scraper_dropdown = document.getElementsByName("scraper")[0];
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scraper_dropdown.addEventListener("change", function(choice){
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submit(form);
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});
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form.addEventListener("submit", function(e){
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e.preventDefault();
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submit(e.srcElement);
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});
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}
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function submit(e){
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var GET = "";
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var first = true;
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if((s = document.getElementsByName("s")).length !== 0){
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GET += "?s=" + encodeURIComponent(s[0].value).replaceAll("%20", "+");
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first = false;
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}
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Array.from(
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e.getElementsByTagName("select")
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).concat(
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Array.from(
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e.getElementsByTagName("input")
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)
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).forEach(function(el){
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var firstelem = el.getElementsByTagName("option");
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if(
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(
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(
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firstelem.length === 0 ||
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firstelem[0].value != el.value
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) &&
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el.name != "" &&
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el.value != "" &&
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el.name != "s"
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) ||
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el.name == "scraper" ||
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el.name == "nsfw"
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){
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if(first){
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GET += "?";
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first = false;
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}else{
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GET += "&";
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}
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GET += encodeURIComponent(el.name).replaceAll("%20", "+") + "=" + encodeURIComponent(el.value).replaceAll("%20", "+");
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}
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});
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window.location.href = GET;
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}
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/*
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Hide show more button when it's not needed on answers
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*/
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var answer_div = document.getElementsByClassName("answer");
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if(answer_div.length !== 0){
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answer_div = Array.from(answer_div);
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var spoiler_button_div = Array.from(document.getElementsByClassName("spoiler-button"));
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// execute on pageload
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hide_show_more();
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window.addEventListener("resize", hide_show_more);
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function hide_show_more(){
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var height = window.innerWidth >= 1000 ? 600 : 200;
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for(i=0; i<answer_div.length; i++){
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if(answer_div[i].scrollHeight < height){
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spoiler_button_div[i].style.display = "none";
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document.getElementById(spoiler_button_div[i].htmlFor).checked = true;
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}else{
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spoiler_button_div[i].style.display = "block";
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}
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}
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}
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}
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switch(document.location.pathname){
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case "/web":
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case "/web.php":
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var image_class = "image";
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break;
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case "/images":
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case "/images.php":
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var image_class = "thumb";
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break;
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default:
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var image_class = null;
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}
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if(image_class !== null){
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/*
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Add popup to document
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*/
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var popup_bg = document.createElement("div");
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popup_bg.id = "popup-bg";
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document.body.appendChild(popup_bg);
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// enable/disable pointer events
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if(!document.cookie.includes("bg_noclick=yes")){
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popup_bg.style.pointerEvents = "none";
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}
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var popup_status = document.createElement("div");
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popup_status.id = "popup-status";
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document.body.appendChild(popup_status);
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var popup_body = document.createElement("div");
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popup_body.id = "popup";
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document.body.appendChild(popup_body);
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// import popup
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var popup_body = document.getElementById("popup");
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var popup_status = document.getElementById("popup-status");
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var popup_image = null; // is set later on popup click
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// image metadata
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var collection = []; // will contain width, height, image URL
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var collection_index = 0;
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// event handling helper variables
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var is_popup_shown = false;
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var mouse_down = false;
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var mouse_move = false;
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var move_x = 0;
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var move_y = 0;
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var target_is_popup = false;
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var mirror_x = false;
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var mirror_y = false;
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var rotation = 0;
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/*
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Image dragging (mousedown)
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*/
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document.addEventListener("mousedown", function(div){
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if(div.buttons !== 1){
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return;
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}
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mouse_down = true;
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mouse_move = false;
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if(is_click_within(div.target, "popup", true) === false){
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target_is_popup = false;
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}else{
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target_is_popup = true;
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var pos = popup_body.getBoundingClientRect();
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move_x = div.x - pos.x;
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move_y = div.y - pos.y;
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}
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});
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/*
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Image dragging (mousemove)
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*/
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document.addEventListener("mousemove", function(pos){
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if(
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target_is_popup &&
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mouse_down
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){
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mouse_move = true;
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movepopup(popup_body, pos.clientX - move_x, pos.clientY - move_y);
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}
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});
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/*
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Image dragging (mouseup)
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*/
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document.addEventListener("mouseup", function(){
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mouse_down = false;
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});
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/*
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Image popup open
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*/
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document.addEventListener("click", function(click){
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// should our click trigger image open?
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if(
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elem = is_click_within(click.target, image_class) ||
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click.target.classList.contains("openimg")
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){
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event.preventDefault();
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is_popup_shown = true;
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// reset position params
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mirror_x = false;
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mirror_y = false;
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rotation = 0;
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scale = 60;
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collection_index = 0;
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// get popup data
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if(elem === true){
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// we clicked a simple image preview
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elem = click.target;
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var image_url = elem.getAttribute("src");
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if(image_url.startsWith("/proxy")){
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var match = image_url.match(/i=([^&]+)/);
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if(match !== null){
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image_url = decodeURIComponent(match[1]);
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}
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}else{
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image_url = htmlspecialchars_decode(image_url);
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}
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collection = [
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{
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"url": image_url,
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"width": Math.round(click.target.naturalWidth),
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"height": Math.round(click.target.naturalHeight)
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}
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];
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var title = "No description provided";
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if(click.target.title != ""){
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title = click.target.title;
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}else{
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if(click.target.alt != ""){
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title = click.target.alt;
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}
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}
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}else{
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if(image_class == "thumb"){
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// we're inside image.php
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elem =
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elem
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.parentElement
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.parentElement;
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var image_url = elem.getElementsByTagName("a")[1].href;
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}else{
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// we're inside web.php
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var image_url = elem.href;
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}
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collection =
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JSON.parse(
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elem.getAttribute("data-json")
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);
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var imagesize = elem.getElementsByTagName("img")[0];
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if(imagesize.complete){
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var imagesize_w = imagesize.naturalWidth;
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var imagesize_h = imagesize.naturalHeight;
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}
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for(var i=0; i<collection.length; i++){
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if(collection[i].width === null){
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collection[i].width = imagesize_w;
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collection[i].height = imagesize_h;
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}
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}
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var title = elem.title;
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}
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// prepare HTML
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var html =
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'<div id="popup-num">(' + collection.length + ')</div>' +
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'<div id="popup-dropdown">' +
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'<select name="viewer-res" onchange="changeimage(event)">';
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for(i=0; i<collection.length; i++){
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if(collection[i].url.startsWith("data:")){
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var domain = "<Base64 Data>";
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}else{
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var domain = new URL(collection[i].url).hostname;
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}
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html += '<option value="' + i + '">' + '(' + collection[i].width + 'x' + collection[i].height + ') ' + domain + '</option>';
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}
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popup_status.innerHTML =
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html + '</select></div>' +
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'<a href="' + htmlspecialchars(image_url) + '" rel="noreferrer nofollow "id="popup-title">' + htmlspecialchars(title) + '</a>';
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popup_body.innerHTML =
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'<img src="' + getproxylink(collection[0].url) + '" draggable="false" id="popup-image">';
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// make changes to DOM
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popup_body.style.display = "block";
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popup_bg.style.display = "block";
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popup_status.style.display = "table";
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// store for rotation functions & changeimage()
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popup_image = document.getElementById("popup-image");
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scalepopup(collection[collection_index], scale);
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centerpopup();
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}else{
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// click inside the image viewer
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// resize image
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if(is_click_within(click.target, "popup", true)){
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if(mouse_move === false){
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scale = 80;
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scalepopup(collection[collection_index], scale);
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centerpopup();
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}
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}else{
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if(is_click_within(click.target, "popup-status", true) === false){
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// click outside the popup while its open
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// close it
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if(is_popup_shown){
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hidepopup();
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}
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}
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}
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}
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});
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/*
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Scale image viewer
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*/
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popup_body.addEventListener("wheel", function(scroll){
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event.preventDefault();
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if(
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scroll.altKey ||
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scroll.ctrlKey ||
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scroll.shiftKey
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){
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var increment = 7;
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}else{
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var increment = 14;
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}
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if(scroll.wheelDelta > 0){
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// scrolling up
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scale = scale + increment;
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}else{
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// scrolling down
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if(scale - increment > 7){
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scale = scale - increment;
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}
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}
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// calculate relative size before scroll
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var pos = popup_body.getBoundingClientRect();
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var x = (scroll.x - pos.x) / pos.width;
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var y = (scroll.y - pos.y) / pos.height;
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scalepopup(collection[collection_index], scale);
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// move popup to % we found
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pos = popup_body.getBoundingClientRect();
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movepopup(
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popup_body,
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scroll.clientX - (x * pos.width),
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scroll.clientY - (y * pos.height)
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);
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});
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/*
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Keyboard controls
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*/
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document.addEventListener("keydown", function(key){
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// close popup
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if(
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is_popup_shown &&
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key.keyCode === 27
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){
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hidepopup();
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return;
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}
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if(is_popup_shown === false){
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return;
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}
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if(
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key.altKey ||
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key.ctrlKey ||
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key.shiftKey
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){
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// mirror image
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switch(key.keyCode){
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case 37:
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// left
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key.preventDefault();
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mirror_x = true;
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break;
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case 38:
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// up
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key.preventDefault();
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mirror_y = false;
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break;
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case 39:
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// right
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key.preventDefault();
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mirror_x = false;
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break;
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case 40:
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// down
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key.preventDefault();
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mirror_y = true;
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break;
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}
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}else{
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// rotate image
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switch(key.keyCode){
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case 37:
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// left
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key.preventDefault();
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rotation = -90;
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break;
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case 38:
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// up
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key.preventDefault();
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rotation = 0;
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break;
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case 39:
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// right
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key.preventDefault();
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rotation = 90;
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break;
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case 40:
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// down
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key.preventDefault();
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rotation = -180;
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break;
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}
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}
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popup_image.style.transform =
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"scale(" +
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(mirror_x ? "-1" : "1") +
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", " +
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(mirror_y ? "-1" : "1") +
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") " +
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"rotate(" +
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rotation + "deg" +
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")";
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});
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}
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function getproxylink(url){
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if(url.startsWith("data:")){
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return htmlspecialchars(url);
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}else{
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return '/proxy?i=' + encodeURIComponent(url);
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}
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}
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function hidepopup(){
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is_popup_shown = false;
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popup_status.style.display = "none";
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popup_body.style.display = "none";
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popup_bg.style.display = "none";
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}
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function scalepopup(size, scale){
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var ratio =
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Math.min(
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(window.innerWidth * (scale / 100)) / collection[collection_index].width, (window.innerHeight * (scale / 100)) / collection[collection_index].height
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);
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popup_body.style.width = size.width * ratio + "px";
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popup_body.style.height = size.height * ratio + "px";
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}
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function centerpopup(){
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var size = popup_body.getBoundingClientRect();
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var size = {
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"width": parseInt(size.width),
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"height": parseInt(size.height)
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};
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movepopup(
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popup_body,
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(window.innerWidth / 2) - (size.width / 2),
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(window.innerHeight / 2) - (size.height / 2)
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);
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}
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function movepopup(popup_body, x, y){
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popup_body.style.left = x + "px";
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popup_body.style.top = y + "px";
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}
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function changeimage(event){
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// reset rotation params
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mirror_x = false;
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mirror_y = false;
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rotation = 0;
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scale = 60;
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collection_index = parseInt(event.target.value);
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// we set innerHTML otherwise old image lingers a little
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popup_body.innerHTML =
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'<img src="' + getproxylink(collection[collection_index].url) + '" draggable="false" id="popup-image">';
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// store for rotation functions & changeimage()
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popup_image = document.getElementById("popup-image");
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|
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scalepopup(collection[collection_index], scale);
|
|
centerpopup();
|
|
}
|
|
|
|
/*
|
|
Shortcuts
|
|
*/
|
|
var searchbox_wrapper = document.getElementsByClassName("searchbox");
|
|
|
|
if(searchbox_wrapper.length !== 0){
|
|
searchbox_wrapper = searchbox_wrapper[0];
|
|
var searchbox = searchbox_wrapper.getElementsByTagName("input")[1];
|
|
|
|
document.addEventListener("keydown", function(key){
|
|
|
|
switch(key.keyCode){
|
|
|
|
case 191:
|
|
// 191 = /
|
|
if(document.activeElement.tagName == "INPUT"){
|
|
|
|
// already focused, ignore
|
|
break;
|
|
}
|
|
|
|
if(
|
|
typeof is_popup_shown != "undefined" &&
|
|
is_popup_shown
|
|
){
|
|
|
|
hidepopup();
|
|
}
|
|
|
|
window.scrollTo(0, 0);
|
|
searchbox.focus();
|
|
key.preventDefault();
|
|
break;
|
|
}
|
|
});
|
|
}
|