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- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <title>Mediator - Remote</title>
- <link rel="stylesheet" href="style.css">
- <link rel="icon" type="image/png" href="favicon.png">
-
- <style>
- body {
- margin: 0px;
- }
-
- #cursor {
- position: absolute;
- left: 0px;
- top: 0px;
- pointer-events: none;
- }
-
- #screencast-container {
- max-height: calc(100% - 200px);
- height: 100%;
- text-align: center;
- }
-
- #screencast-container {
- background: black;
- }
-
- #screencast {
- max-height: calc(100vh - 200px);
- max-width: 100%;
- }
- </style>
- </head>
-
- <body>
- <img id="cursor" src="cursor.png" width=25>
- <div id="screencast-container">
- <img id="screencast" src="/api/remote/screencast">
- </div>
-
- <form id="text-form">
- <input id="text" name="text" type="text">
- </form>
-
- <script src="util.js"></script>
- <script>
- let cursorEl = document.getElementById("cursor");
- let screencastEl = document.getElementById("screencast");
- let screencastContainerEl = document.getElementById("screencast-container");
- let textFormEl = document.getElementById("text-form");
- let textEl = document.getElementById("text");
- let screencastSrc = screencastEl.src;
-
- window.addEventListener("blur", () => {
- let canvas = document.createElement("canvas");
- canvas.width = screencastEl.width;
- canvas.height = screencastEl.height;
- let ctx = canvas.getContext("2d");
- ctx.drawImage(screencastEl, 0, 0, canvas.width, canvas.height);
- screencastEl.src = canvas.toDataURL();
- });
-
- window.addEventListener("focus", () => {
- screencastEl.src = screencastSrc;
- });
-
- window.addEventListener("keydown", evt => {
- let handled = true;
- console.log("key:", evt.key);
- if (evt.key == " ") {
- api("POST", "remote/keyboard-key", {key: "space"});
- } else if (evt.key == "Enter" && document.activeElement.tagName != "INPUT") {
- api("POST", "remote/keyboard-key", {key: "enter"});
- } else if (evt.key == "ArrowUp") {
- api("POST", "remote/keyboard-key", {key: "up"});
- } else if (evt.key == "ArrowDown") {
- api("POST", "remote/keyboard-key", {key: "down"});
- } else if (evt.key == "ArrowLeft") {
- api("POST", "remote/keyboard-key", {key: "left"});
- } else if (evt.key == "ArrowRight") {
- api("POST", "remote/keyboard-key", {key: "right"});
- } else if (evt.key == "Escape") {
- api("POST", "remote/keyboard-key", {key: "escape"});
- } else {
- handled = false;
- if (evt.key.length == 1 && document.activeElement.tagName != "INPUT") {
- textEl.focus();
- }
- }
-
- if (handled) {
- evt.preventDefault();
- }
- });
-
- function updateCursor(mousePos, screenSize) {
- let fracX = mousePos.x / screenSize.width;
- let fracY = mousePos.y / screenSize.height;
- let left = fracX * screencastEl.offsetWidth + screencastEl.offsetLeft;
- let top = fracY * screencastEl.offsetHeight + screencastEl.offsetTop;
- cursorEl.style.left = left + "px";
- cursorEl.style.top = top + "px";
- }
-
- let scrollDist = {x: 0, y: 0};
- function onScroll(delta) {
- // Scroll is inverted
- delta.x = -delta.x;
- delta.y = -delta.y;
-
- if (Math.abs(delta.x) > Math.abs(delta.y)) {
- scrollDist.x += delta.x;
- let distX = roundToZero(scrollDist.x);
- if (distX != 0) {
- api("POST", "remote/scroll", {x: distX, y: 0});
- scrollDist.x -= distX;
- }
- } else {
- scrollDist.y += delta.y;
- let distY = roundToZero(scrollDist.y);
- if (distY != 0) {
- api("POST", "remote/scroll", {x: 0, y: distY});
- scrollDist.y -= distY;
- }
- }
- }
-
- function moveDelta(mousePos, screenSize, delta) {
- mousePos.x += delta.x;
- if (mousePos.x >= screenSize.width) {
- mousePos.x = screenSize.width - 1;
- } else if (mousePos.x < 0) {
- mousePos.x = 0;
- }
-
- mousePos.y += delta.y;
- if (mousePos.y >= screenSize.height) {
- mousePos.y = screenSize.height - 1;
- } else if (mousePos.y < 0) {
- mousePos.y = 0;
- }
-
- updateCursor(mousePos, screenSize);
- api("PUT", "remote/mouse-pos", mousePos);
- }
-
- function signPow(num, pow) {
- if (num >= 0) {
- return Math.pow(num, pow);
- } else {
- return -Math.pow(-num, pow);
- }
- }
-
- function roundToZero(num) {
- if (num >= 0) {
- return Math.floor(num);
- } else {
- return Math.ceil(num);
- }
- }
-
- async function main() {
- let screenSize = await api("GET", "remote/screen-size");
- let mousePos = await api("GET", "remote/mouse-pos");
-
- updateCursor(mousePos, screenSize);
- setInterval(async () => {
- mousePos = await api("GET", "remote/mouse-pos");
- updateCursor(mousePos, screenSize);
- }, 1000);
-
- textFormEl.addEventListener("submit", async evt => {
- evt.preventDefault();
- let text = evt.target.elements.text.value;
- evt.target.elements.text.value = "";
- await api("POST", "remote/keyboard-type", {text});
- api("POST", "remote/keyboard-key", {key: "enter"});
- });
-
- screencastContainerEl.addEventListener("click", evt => {
- evt.preventDefault();
- api("POST", "remote/mouse-click", {button: "left", doubleClick: false});
- });
-
- screencastContainerEl.addEventListener("dblclick", evt => {
- evt.preventDefault();
- api("POST", "remote/mouse-click", {button: "left", doubleClick: true});
- });
-
- screencastContainerEl.addEventListener("wheel", evt => {
- evt.preventDefault();
- onScroll({x: evt.deltaX / 5, y: evt.deltaY / 5});
- });
-
- screencastEl.addEventListener("mousemove", evt => {
- if (evt.buttons != 0) {
- return;
- }
-
- evt.preventDefault();
- let fracX = evt.offsetX / evt.target.offsetWidth;
- let fracY = evt.offsetY / evt.target.offsetHeight;
- mousePos.x = Math.round(fracX * screenSize.width);
- mousePos.y = Math.round(fracY * screenSize.height);
- updateCursor(mousePos, screenSize);
- api("PUT", "remote/mouse-pos", mousePos);
- });
-
- screencastContainerEl.addEventListener("mousemove", evt => {
- if (evt.buttons != 1) {
- return;
- }
-
- evt.preventDefault();
- moveDelta(mousePos, screenSize, {x: evt.movementX, y: evt.movementY});
- });
-
- let numTouches = 0;
- let touches = {};
- screencastContainerEl.addEventListener("touchstart", evt => {
- evt.preventDefault();
- numTouches += evt.changedTouches.length;
- for (let touch of evt.changedTouches) {
- touches[touch.identifier] = {x: touch.clientX, y: touch.clientY, moveDist: 0};
- }
- });
-
- screencastContainerEl.addEventListener("touchmove", evt => {
- evt.preventDefault();
-
- let delta = {x: 0, y: 0}
- for (let touch of evt.changedTouches) {
- let oldTouch = touches[touch.identifier];
- let d = {x: touch.clientX - oldTouch.x, y: touch.clientY - oldTouch.y};
- oldTouch.moveDist += Math.sqrt(d.x * d.x + d.y * d.y);
- oldTouch.x = touch.clientX;
- oldTouch.y = touch.clientY;
- delta.x += d.x;
- delta.y += d.y;
- }
-
- if (numTouches == 1) {
- delta.x = Math.round(signPow(delta.x, 1.5));
- delta.y = Math.round(signPow(delta.y, 1.5));
- moveDelta(mousePos, screenSize, delta);
- } else if (numTouches == 2) {
- delta.x = -delta.x / 5 / numTouches;
- delta.y = -delta.y / 5 / numTouches;
- onScroll(delta);
- }
- });
-
- screencastContainerEl.addEventListener("touchend", evt => {
- evt.preventDefault();
- numTouches -= evt.changedTouches.length;
- for (let touch of evt.changedTouches) {
- numTouches -= 1;
- let oldTouch = touches[touch.identifier];
- touches[touch.identifier] = null;
- if (oldTouch.moveDist < 10) {
- api("POST", "remote/mouse-click", {button: "left", doubleClick: false});
- break;
- }
- }
- });
- }
-
- main();
- </script>
- </body>
- </html>
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