mirror of
https://github.com/placeAtlas/atlas.git
synced 2024-11-05 15:19:52 +01:00
567 lines
14 KiB
JavaScript
567 lines
14 KiB
JavaScript
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/*
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========================================================================
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The /r/place Atlas
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An Atlas of Reddit's /r/place, with information to each
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artwork of the canvas provided by the community.
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Copyright (C) 2017 Roland Rytz <roland@draemm.li>
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Licensed under the GNU Affero General Public License Version 3
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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For more information, see:
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http://place-atlas.stefanocoding.me/license.txt
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========================================================================
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*/
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function initOverlap(){
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var wrapper = document.getElementById("wrapper");
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var objectsContainer = document.getElementById("objectsList");
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var linesCanvas = document.getElementById("linesCanvas");
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var linesContext = linesCanvas.getContext("2d");
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var backgroundCanvas = document.createElement("canvas");
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backgroundCanvas.width = 2000;
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backgroundCanvas.height = 2000;
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var backgroundContext = backgroundCanvas.getContext("2d");
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var filterInput = document.getElementById("searchList");
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var entriesList = document.getElementById("entriesList");
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var hideListButton = document.getElementById("hideListButton");
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var entriesListShown = true;
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var entriesLimit = 50;
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var entriesOffset = 0;
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var moreEntriesButton = document.createElement("button");
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moreEntriesButton.innerHTML = "Show "+entriesLimit+" more";
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moreEntriesButton.id = "moreEntriesButton";
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moreEntriesButton.onclick = function(){
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buildObjectsList();
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};
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var viewportWidth = document.documentElement.clientWidth;
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var hovered = [];
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var lastPos = [0, 0];
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var fixed = false; // Fix hovered items in place, so that clicking on links is possible
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renderBackground();
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render();
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buildObjectsList();
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// parse linked atlas entry id from link hash
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/*if (window.location.hash.substring(3)){
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zoom = 4;
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applyView();
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highlightEntryFromUrl();
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}*/
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if(document.documentElement.clientWidth > 2000){
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entriesListShown = true;
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wrapper.className = wrapper.className.replace(/ listHidden/g, "");
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}
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if(document.documentElement.clientWidth < 2000){
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entriesListShown = false;
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wrapper.className += " listHidden";
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}
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applyView();
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render();
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updateLines();
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var args = window.location.search;
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if(args){
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id = args.split("id=")[1];
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if(id){
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highlightEntryFromUrl();
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}
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}
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container.addEventListener("mousemove", function(e){
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updateHovering(e);
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});
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filterInput.addEventListener("input", function(e){
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entriesOffset = 0;
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entriesList.innerHTML = "";
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entriesList.appendChild(moreEntriesButton);
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buildObjectsList(this.value.toLowerCase());
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});
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document.getElementById("sort").addEventListener("input", function(e){
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entriesOffset = 0;
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entriesList.innerHTML = "";
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entriesList.appendChild(moreEntriesButton);
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buildObjectsList(filterInput.value.toLowerCase());
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});
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hideListButton.addEventListener("click", function(e){
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entriesListShown = !entriesListShown;
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if(entriesListShown){
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wrapper.className = wrapper.className.replace(/ listHidden/g, "");
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} else {
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wrapper.className += " listHidden";
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}
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applyView();
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updateHovering(e);
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render();
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updateLines();
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});
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function createInfoBlock(entry){
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var element = document.createElement("div");
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element.className = "object";
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var html = '<h2><a href="?id='+entry.id+'">'+entry.name+'</a></h2>';
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if(entry.description){
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html += '<p>'+entry.description+'</p>';
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}
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if(entry.website){
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html += '<a target="_blank" href='+entry.website+'>Website</a>';
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}
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if(entry.subreddit){
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if(entry.subreddit.substring(0, 2) == "r/"){
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entry.subreddit = "/" + entry.subreddit;
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} else if(entry.subreddit.substring(0, 1) != "/"){
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entry.subreddit = "/r/" + entry.subreddit;
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}
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html += '<a target="_blank" href=https://reddit.com'+entry.subreddit+'>'+entry.subreddit+'</a>';
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}
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element.innerHTML += html;
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return element;
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}
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function highlightEntryFromUrl(){
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var objectsContainer = document.getElementById("objectsList");
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var id = 0;
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var args = window.location.search;
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if(args){
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id = args.split("id=")[1];
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if(id){
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id = parseInt(id.split("&")[0]);
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}
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}
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//var id = parseInt(window.location.hash.substring(3));
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var entry = atlas.filter(function(e){
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return e.id === id;
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});
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if (entry.length === 1){
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entry = entry[0];
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var infoElement = createInfoBlock(entry);
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objectsContainer.innerHTML = "";
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objectsContainer.appendChild(infoElement);
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//console.log(entry.center[0]);
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//console.log(entry.center[1]);
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zoom = 4;
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applyView();
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zoomOrigin = [
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innerContainer.clientWidth/2 - entry.center[0]* zoom// + container.offsetLeft
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,innerContainer.clientHeight/2 - entry.center[1]* zoom// + container.offsetTop
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];
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//console.log(zoomOrigin);
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applyView();
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hovered = [entry];
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render();
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hovered[0].element = infoElement;
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updateLines();
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fixed = true;
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}
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}
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function updateHovering(e){
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if(!dragging && !fixed){
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var pos = [
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(e.clientX - (container.clientWidth/2 - innerContainer.clientWidth/2 + zoomOrigin[0] + container.offsetLeft))/zoom
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,(e.clientY - (container.clientHeight/2 - innerContainer.clientHeight/2 + zoomOrigin[1] + container.offsetTop))/zoom
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];
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if(pos[0] <= 2200 && pos[0] >= -100 && pos[0] <= 2200 && pos[0] >= -100){
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var newHovered = [];
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for(var i = 0; i < atlas.length; i++){
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if(pointIsInPolygon(pos, atlas[i].path)){
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newHovered.push(atlas[i]);
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}
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}
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var changed = false;
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if(hovered.length == newHovered.length){
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for(var i = 0; i < hovered.length; i++){
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if(hovered[i].id != newHovered[i].id){
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changed = true;
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break;
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}
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}
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} else {
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changed = true;
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}
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if(changed){
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hovered = newHovered;
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objectsContainer.innerHTML = "";
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for(var i in hovered){
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var element = createInfoBlock(hovered[i]);
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objectsContainer.appendChild(element);
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hovered[i].element = element;
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}
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render();
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}
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}
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}
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}
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function renderBackground(){
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backgroundContext.clearRect(0, 0, canvas.width, canvas.height);
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backgroundContext.fillStyle = "rgba(255, 255, 255, 1)";
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backgroundContext.fillRect(0, 0, canvas.width, canvas.height);
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for(var i = 0; i < atlas.length; i++){
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var path = atlas[i].path;
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backgroundContext.beginPath();
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if(path[0]){
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backgroundContext.moveTo(path[0][0], path[0][1]);
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}
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for(var p = 1; p < path.length; p++){
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backgroundContext.lineTo(path[p][0], path[p][1]);
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}
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backgroundContext.closePath();
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backgroundContext.fillStyle = "rgba(0, 0, 255, 0.2)";
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backgroundContext.fill();
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}
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var pixels = backgroundContext.getImageData(0, 0, backgroundCanvas.width, backgroundCanvas.height).data;
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var blank = 0;
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for(var i = 0; i < pixels.length; i+=4){
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if(pixels[i] == 255){
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blank++;
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}
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}
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console.log(blank+" blank pixels, which are "+Math.round(blank/100)/100+"% of the canvas ("+(100-Math.round(blank/100)/100)+"% mapped)");
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}
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function buildObjectsList(filter){
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if(entriesList.contains(moreEntriesButton)){
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entriesList.removeChild(moreEntriesButton);
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}
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var sortedAtlas;
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if(filter){
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sortedAtlas = atlas.filter(function(value){
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return (value.name.toLowerCase().indexOf(filter) !== -1);
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});
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document.getElementById("atlasSize").innerHTML = "Found "+sortedAtlas.length+" entries.";
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} else {
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sortedAtlas = atlas.concat();
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document.getElementById("atlasSize").innerHTML = "The Atlas contains "+sortedAtlas.length+" entries.";
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}
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var sort = document.getElementById("sort").value;
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var sortFunction;
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//console.log(sort);
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switch(sort){
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case "alphaAsc":
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sortFunction = function(a, b){
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return a.name.toLowerCase().localeCompare(b.name.toLowerCase());
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}
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break;
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case "alphaDesc":
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sortFunction = function(a, b){
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return b.name.toLowerCase().localeCompare(a.name.toLowerCase());
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}
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break;
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case "newest":
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sortFunction = function(a, b){
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if (a.id > b.id) {
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return -1;
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}
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if (a.id < b.id) {
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return 1;
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}
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// a must be equal to b
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return 0;
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}
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break;
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case "oldest":
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sortFunction = function(a, b){
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if (a.id < b.id) {
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return -1;
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}
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if (a.id > b.id) {
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return 1;
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}
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// a must be equal to b
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return 0;
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}
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break;
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}
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sortedAtlas.sort(sortFunction);
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for(var i = entriesOffset; i < entriesOffset+entriesLimit; i++){
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if(i >= sortedAtlas.length){
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break;
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}
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var element = createInfoBlock(sortedAtlas[i]);
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element.entry = sortedAtlas[i];
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element.addEventListener("mouseenter", function(e){
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if(!fixed && !dragging){
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objectsContainer.innerHTML = "";
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zoomOrigin = [
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innerContainer.clientWidth/2 - this.entry.center[0]* zoom// + container.offsetLeft
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,innerContainer.clientHeight/2 - this.entry.center[1]* zoom// + container.offsetTop
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]
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//console.log(zoomOrigin);
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applyView();
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hovered = [this.entry];
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render();
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hovered[0].element = this;
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updateLines();
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}
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});
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element.addEventListener("mouseleave", function(e){
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if(!fixed && !dragging){
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hovered = [];
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updateLines();
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render();
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}
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});
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entriesList.appendChild(element);
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}
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entriesOffset += entriesLimit;
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if(sortedAtlas.length > entriesOffset){
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moreEntriesButton.innerHTML = "Show "+Math.min(entriesLimit, sortedAtlas.length - entriesOffset)+" more";
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entriesList.appendChild(moreEntriesButton);
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}
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}
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function render(){
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context.globalCompositeOperation = "source-over";
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context.clearRect(0, 0, canvas.width, canvas.height);
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if(hovered.length > 0){
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container.style.cursor = "pointer";
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} else {
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container.style.cursor = "default";
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}
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for(var i = 0; i < hovered.length; i++){
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var path = hovered[i].path;
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context.beginPath();
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if(path[0]){
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context.moveTo(path[0][0], path[0][1]);
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}
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for(var p = 1; p < path.length; p++){
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context.lineTo(path[p][0], path[p][1]);
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}
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context.closePath();
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context.globalCompositeOperation = "source-over";
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context.fillStyle = "rgba(0, 0, 0, 1)";
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context.fill();
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}
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context.globalCompositeOperation = "source-out";
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context.drawImage(backgroundCanvas, 0, 0);
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for(var i = 0; i < hovered.length; i++){
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var path = hovered[i].path;
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context.beginPath();
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if(path[0]){
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context.moveTo(path[0][0], path[0][1]);
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}
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for(var p = 1; p < path.length; p++){
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context.lineTo(path[p][0], path[p][1]);
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}
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context.closePath();
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context.globalCompositeOperation = "source-over";
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context.strokeStyle = "rgba(0, 0, 0, 1)";
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context.stroke();
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}
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}
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function toggleFixed(e){
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if(!fixed && hovered.length == 0){
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return 0;
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}
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fixed = !fixed;
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if(!fixed){
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updateHovering(e);
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render();
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}
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}
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function updateLines(){
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linesCanvas.width = linesCanvas.clientWidth;
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linesCanvas.height = linesCanvas.clientHeight;
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linesContext.lineCap = "round";
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linesContext.lineWidth = Math.max(Math.min(zoom*1.5, 16*1.5), 6);
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linesContext.strokeStyle = "#000000";
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for(var i = 0; i < hovered.length; i++){
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var element = hovered[i].element;
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linesContext.beginPath();
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//linesContext.moveTo(element.offsetLeft + element.clientWidth - 10, element.offsetTop + 20);
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linesContext.moveTo(
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element.getBoundingClientRect().left + document.documentElement.scrollLeft + element.clientWidth/2
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,element.getBoundingClientRect().top + document.documentElement.scrollTop + 20
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);
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linesContext.lineTo(
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~~(hovered[i].center[0]*zoom) + innerContainer.offsetLeft
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,~~(hovered[i].center[1]*zoom) + innerContainer.offsetTop
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);
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linesContext.stroke();
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}
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linesContext.lineWidth = Math.max(Math.min(zoom, 16), 4);
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linesContext.strokeStyle = "#FFFFFF";
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for(var i = 0; i < hovered.length; i++){
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var element = hovered[i].element;
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linesContext.beginPath();
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linesContext.moveTo(
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element.getBoundingClientRect().left + document.documentElement.scrollLeft + element.clientWidth/2
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,element.getBoundingClientRect().top + document.documentElement.scrollTop + 20
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);
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linesContext.lineTo(
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~~(hovered[i].center[0]*zoom) + innerContainer.offsetLeft
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,~~(hovered[i].center[1]*zoom) + innerContainer.offsetTop
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);
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linesContext.stroke();
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}
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}
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window.addEventListener("resize", updateLines);
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window.addEventListener("mousemove", updateLines);
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window.addEventListener("dblClick", updateLines);
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window.addEventListener("wheel", updateLines);
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container.addEventListener("mousedown", function(e){
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lastPos = [
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e.clientX
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,e.clientY
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];
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});
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container.addEventListener("mouseup", function(e){
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if(Math.abs(lastPos[0] - e.clientX) + Math.abs(lastPos[1] - e.clientY) <= 4){
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toggleFixed(e);
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}
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});
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objectsContainer.addEventListener("scroll", function(e){
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updateLines();
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});
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window.addEventListener("resize", function(){
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//console.log(document.documentElement.clientWidth, document.documentElement.clientHeight);
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if(document.documentElement.clientWidth > 2000 && viewportWidth <= 2000){
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entriesListShown = true;
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wrapper.className = wrapper.className.replace(/ listHidden/g, "");
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}
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if(document.documentElement.clientWidth < 2000 && viewportWidth >= 2000){
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entriesListShown = false;
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wrapper.className += " listHidden";
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}
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viewportWidth = document.documentElement.clientWidth;
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applyView();
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render();
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updateLines();
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});
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}
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