mirror of
https://github.com/kkapsner/CanvasBlocker
synced 2024-12-22 21:00:23 +01:00
379 lines
10 KiB
JavaScript
379 lines
10 KiB
JavaScript
function addTest(container, title, callback){
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"use strict";
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const testContainer = document.createElement("div");
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testContainer.className = "test";
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const titleNode = document.createElement("h3");
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titleNode.textContent = title;
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testContainer.appendChild(titleNode);
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const resultsNode = document.createElement("div");
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resultsNode.className = "results";
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testContainer.appendChild(resultsNode);
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callback(resultsNode);
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container.appendChild(testContainer);
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}
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function addConsistencyTest(title, callback){
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"use strict";
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addTest(document.getElementById("consistency"), title, function(resultsNode){
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const line = document.createElement("div");
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line.textContent = "consistent: ";
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resultsNode.appendChild(line);
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const consistent = document.createElement("span");
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consistent.className = "result";
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line.appendChild(consistent);
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async function compute(){
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consistent.textContent = "computing";
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try {
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const value = await callback();
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consistent.textContent = value? "OK": "not OK";
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}
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catch (error){
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consistent.classList.add("failed");
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if (Array.isArray(error)){
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consistent.textContent = "";
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const ul = document.createElement("ul");
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consistent.appendChild(ul);
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error.forEach(function(error){
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const li = document.createElement("li");
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li.textContent = error;
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ul.appendChild(li);
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});
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}
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else {
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consistent.textContent = error;
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}
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}
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}
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compute();
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window.addEventListener("resize", compute);
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});
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}
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addConsistencyTest("screen properties", function(){
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"use strict";
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if (screen.orientation.type.match(/landscape/) && screen.width < screen.height){
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throw "orientation wrong";
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}
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if (screen.availHeight > screen.height){
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throw "available height too big";
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}
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if (screen.availWidth > screen.width){
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throw "available width too big";
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}
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return true;
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});
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addConsistencyTest("media queries: window.matchMedia - low value", function(){
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"use strict";
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const value = Math.floor(Math.min(screen.width, screen.height) / 2);
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return (
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window.matchMedia("(min-device-width: " + value + "px)").matches &&
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window.matchMedia("(min-device-height: " + value + "px)").matches &&
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!window.matchMedia("(max-device-width: " + value + "px)").matches &&
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!window.matchMedia("(max-device-height: " + value + "px)").matches
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);
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});
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addConsistencyTest("media queries: window.matchMedia - reported value", function(){
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"use strict";
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const errors = [];
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["width", "height"].forEach(function(dimension){
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["min-", "max-", ""].forEach(function(comparison){
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const queryBase = "(" + comparison + "device-" + dimension + ": ";
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let query = queryBase + screen[dimension] + "px)";
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if (!window.matchMedia(query).matches){
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errors.push(query + " did not match.");
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query = queryBase + (screen[dimension] + 1) + "px)";
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if (!window.matchMedia(query).matches){
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errors.push(query + " did not match.");
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}
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query = queryBase + (screen[dimension] - 1) + "px)";
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if (!window.matchMedia(query).matches){
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errors.push(query + " did not match.");
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}
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}
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});
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});
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if (errors.length){
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return Promise.reject(errors);
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}
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return true;
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});
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addConsistencyTest("media queries: window.matchMedia - big value", function(){
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"use strict";
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const value = Math.max(screen.width, screen.height) * 2;
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return (
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!window.matchMedia("(min-device-width: " + value + "px)").matches &&
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!window.matchMedia("(min-device-height: " + value + "px)").matches &&
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window.matchMedia("(max-device-width: " + value + "px)").matches &&
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window.matchMedia("(max-device-height: " + value + "px)").matches
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);
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});
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const addResolutionTest = function(){
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"use strict";
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return function addResolutionTest(title, callback, properties = ["width", "height"]){
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addTest(document.getElementById("resolution"), title, function(resultsNode){
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properties.forEach(function(type){
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const line = document.createElement("div");
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line.textContent = type + ": ";
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resultsNode.appendChild(line);
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const number = document.createElement("span");
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number.className = "result " + type;
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line.appendChild(number);
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async function compute(){
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number.textContent = "computing";
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try {
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const value = await callback(type);
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number.textContent = value;
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}
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catch (error){
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number.classList.add("failed");
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number.textContent = error;
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}
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}
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compute();
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window.addEventListener("resize", compute);
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});
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});
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};
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}();
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addResolutionTest("screen properties", function(type){
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"use strict";
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return screen[type];
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});
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addResolutionTest("screen properties: avail...", function(type){
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"use strict";
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return screen[
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"avail" + type.substring(0, 1).toUpperCase() + type.substring(1)
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];
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}, ["width", "height", "left", "top"]);
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addResolutionTest("window properties: inner...", function(type){
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"use strict";
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return window[
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"inner" + type.substring(0, 1).toUpperCase() + type.substring(1)
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];
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});
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addResolutionTest("window properties: outer...", function(type){
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"use strict";
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return window[
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"outer" + type.substring(0, 1).toUpperCase() + type.substring(1)
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];
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});
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async function searchValue(tester){
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"use strict";
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let minValue = 0;
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let maxValue = 512;
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const ceiling = Math.pow(2, 32);
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async function stepUp(){
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if (maxValue > ceiling){
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throw "Unable to find upper bound";
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}
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const testResult = await tester(maxValue);
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if (testResult === searchValue.isEqual){
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return maxValue;
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}
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else if (testResult === searchValue.isBigger){
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minValue = maxValue;
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maxValue *= 2;
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return stepUp();
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}
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else {
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return false;
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}
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}
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async function binarySearch(){
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if (maxValue - minValue < 0.01){
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const testResult = await tester(minValue);
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if (testResult.isEqual){
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return minValue;
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}
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else {
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const testResult = await tester(maxValue);
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if (testResult.isEqual){
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return maxValue;
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}
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else {
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throw "Search could not find exact value." +
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" It's between " + minValue + " and " + maxValue + ".";
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}
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}
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}
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else {
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const pivot = (minValue + maxValue) / 2;
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const testResult = await tester(pivot);
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if (testResult === searchValue.isEqual){
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return pivot;
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}
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else if (testResult === searchValue.isBigger){
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minValue = pivot;
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return binarySearch();
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}
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else {
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maxValue = pivot;
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return binarySearch();
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}
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}
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}
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const stepUpResult = await stepUp();
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if (stepUpResult){
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return stepUpResult;
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}
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else {
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return binarySearch();
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}
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}
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searchValue.isSmaller = -1;
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searchValue.isEqual = 0;
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searchValue.isBigger = 1;
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addResolutionTest("media queries: window.matchMedia (max)", function(type){
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"use strict";
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return searchValue(function(valueToTest){
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if (window.matchMedia("(device-" + type + ": " + valueToTest + "px)").matches){
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return searchValue.isEqual;
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}
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else if (window.matchMedia("(max-device-" + type + ": " + valueToTest + "px)").matches){
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return searchValue.isSmaller;
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}
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else {
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return searchValue.isBigger;
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}
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});
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});
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addResolutionTest("media queries: window.matchMedia (min)", function(type){
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"use strict";
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return searchValue(function(valueToTest){
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if (window.matchMedia("(device-" + type + ": " + valueToTest + "px)").matches){
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return searchValue.isEqual;
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}
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else if (window.matchMedia("(min-device-" + type + ": " + valueToTest + "px)").matches){
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return searchValue.isBigger;
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}
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else {
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return searchValue.isSmaller;
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}
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});
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});
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addResolutionTest("media queries: css (max)", function(type){
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"use strict";
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const tester = document.createElement("div");
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const id = "tester_" + (Math.random() * Math.pow(2, 32)).toString(36).replace(".", "_");
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tester.id = id;
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document.body.appendChild(tester);
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const style = document.createElement("style");
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style.type = "text/css";
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document.head.appendChild(style);
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const styleSheet = document.styleSheets[document.styleSheets.length - 1];
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styleSheet.insertRule("#" + id + "{position: fixed; right: 100%; z-index: 0;}");
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return searchValue(function(valueToTest){
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return new Promise(function(resolve, reject){
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while (styleSheet.rules.length > 1){
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styleSheet.removeRule(1);
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}
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let rule = "@media (max-device-" + type + ": " + valueToTest + "px){#" + id + "{z-index: 1;}}";
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styleSheet.insertRule(rule, 1);
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rule = "@media (device-" + type + ": " + valueToTest + "px){#" + id + "{z-index: 2;}}";
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styleSheet.insertRule(rule, 2);
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window.setTimeout(function(){
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const testValue = window.getComputedStyle(tester).zIndex;
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switch (testValue){
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case "0":
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resolve(searchValue.isBigger);
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break;
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case "1":
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resolve(searchValue.isSmaller);
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break;
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case "2":
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resolve(searchValue.isEqual);
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break;
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default:
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reject("Unknown test value: " + testValue);
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}
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}, 1);
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});
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});
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});
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addResolutionTest("media queries: css (min)", function(type){
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"use strict";
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const tester = document.createElement("div");
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const id = "tester_" + (Math.random() * Math.pow(2, 32)).toString(36).replace(".", "_");
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tester.id = id;
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document.body.appendChild(tester);
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const style = document.createElement("style");
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style.type = "text/css";
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document.head.appendChild(style);
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const styleSheet = document.styleSheets[document.styleSheets.length - 1];
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styleSheet.insertRule("#" + id + "{position: fixed; right: 100%; z-index: 0;}");
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return searchValue(function(valueToTest){
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return new Promise(function(resolve, reject){
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while (styleSheet.rules.length > 1){
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styleSheet.removeRule(1);
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}
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let rule = "@media (min-device-" + type + ": " + valueToTest + "px){#" + id + "{z-index: 1;}}";
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styleSheet.insertRule(rule, 1);
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rule = "@media (device-" + type + ": " + valueToTest + "px){#" + id + "{z-index: 2;}}";
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styleSheet.insertRule(rule, 2);
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window.setTimeout(function(){
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const testValue = window.getComputedStyle(tester).zIndex;
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switch (testValue){
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case "0":
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resolve(searchValue.isSmaller);
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break;
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case "1":
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resolve(searchValue.isBigger);
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break;
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case "2":
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resolve(searchValue.isEqual);
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break;
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default:
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reject("Unknown test value: " + testValue);
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}
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}, 1);
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});
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});
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});
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