mirror of
https://github.com/novnc/noVNC.git
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af6b17ce06
The purpose of the code is to be incorporated into other web projects (whether those are free or not). AGPL prevents combination with other HTML and javascript that is under a weaker (or proprietary) license. Better would be a lesser AGPL, but there is not GNU standard for that. So LGPL-3 meets most of my requirements. If somebody modifies the actual client code and conveys it, then they must release the changes under LGPL-3 also. Add some implementation notes in docs/notes.
331 lines
11 KiB
JavaScript
331 lines
11 KiB
JavaScript
/*
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* noVNC: HTML5 VNC client
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* Copyright (C) 2010 Joel Martin
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* Licensed under LGPL-3 (see LICENSE.LGPL-3)
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*
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* See README.md for usage and integration instructions.
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*/
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"use strict";
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/*global window, $, Browser */
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// Everything namespaced inside Canvas
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var Canvas = {
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prefer_js : false,
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c_x : 0,
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c_y : 0,
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c_wx : 0,
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c_wy : 0,
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ctx : null,
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prevStyle: "",
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mouseDown: function (e) {
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var evt = e.event || window.event;
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e.stop();
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console.log('mouse ' + evt.which + '/' + evt.button + ' down:' +
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(evt.clientX - Canvas.c_x) + "," + (evt.clientY - Canvas.c_y));
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},
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mouseUp: function (e) {
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var evt = e.event || window.event;
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e.stop();
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console.log('mouse ' + evt.which + '/' + evt.button + ' up:' +
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(evt.clientX - Canvas.c_x) + "," + (evt.clientY - Canvas.c_y));
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},
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mouseMove: function (e) {
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var evt = e.event || window.event;
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console.log('mouse ' + evt.which + '/' + evt.button + ' up:' +
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(evt.clientX - Canvas.c_x) + "," + (evt.clientY - Canvas.c_y));
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},
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mouseWheel: function (e) {
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var evt = e.event || window.event;
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//e = e ? e : window.event;
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var wheelData = evt.detail ? evt.detail * -1 : evt.wheelDelta / 40;
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console.log('mouse scroll by ' + wheelData + ':' +
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(evt.clientX - Canvas.c_x) + "," + (evt.clientY - Canvas.c_y));
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},
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keyDown: function (e) {
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e.stop();
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console.log("keydown: " + e.key + "(" + e.code + ")");
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},
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keyUp : function (e) {
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e.stop();
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console.log("keyup: " + e.key + "(" + e.code + ")");
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},
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ctxDisable: function (e) {
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var evt = e.event || window.event;
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/* Stop propagation if inside canvas area */
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if ((evt.clientX >= Canvas.c_x) &&
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(evt.clientY >= Canvas.c_y) &&
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(evt.clientX < (Canvas.c_x + Canvas.c_wx)) &&
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(evt.clientY < (Canvas.c_y + Canvas.c_wy))) {
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e.stop();
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return false;
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}
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},
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init: function (id, width, height, keyDown, keyUp,
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mouseDown, mouseUp, mouseMove, mouseWheel) {
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console.log(">> Canvas.init");
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Canvas.id = id;
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if (! keyDown) { keyDown = Canvas.keyDown; }
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if (! keyUp) { keyUp = Canvas.keyUp; }
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if (! mouseDown) { mouseDown = Canvas.mouseDown; }
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if (! mouseUp) { mouseUp = Canvas.mouseUp; }
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if (! mouseMove) { mouseMove = Canvas.mouseMove; }
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if (! mouseWheel) { mouseWheel = Canvas.mouseWheel; }
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var c = $(Canvas.id);
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document.addEvent('keydown', keyDown);
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document.addEvent('keyup', keyUp);
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c.addEvent('mousedown', mouseDown);
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c.addEvent('mouseup', mouseUp);
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c.addEvent('mousemove', mouseMove);
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c.addEvent('mousewheel', mouseWheel);
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/* Work around right and middle click browser behaviors */
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document.addEvent('click', Canvas.ctxDisable);
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document.body.addEvent('contextmenu', Canvas.ctxDisable);
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c.width = width;
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c.height = height;
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Canvas.c_x = c.getPosition().x;
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Canvas.c_y = c.getPosition().y;
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Canvas.c_wx = c.getSize().x;
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Canvas.c_wy = c.getSize().y;
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if (! c.getContext) { return; }
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Canvas.ctx = c.getContext('2d');
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Canvas.prevStyle = "";
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if (Browser.Engine.webkit) {
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Canvas.prefer_js = true;
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}
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console.log("<< Canvas.init");
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},
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clear: function () {
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Canvas.ctx.clearRect(0, 0, Canvas.c_wx, Canvas.c_wy);
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var c = $(Canvas.id);
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c.width = 640;
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c.height = 20;
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},
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stop: function () {
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var c = $(Canvas.id);
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document.removeEvents('keydown');
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document.removeEvents('keyup');
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c.removeEvents('mousedown');
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c.removeEvents('mouseup');
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c.removeEvents('mousemove');
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c.removeEvents('DOMMouseScroll');
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/* Work around right and middle click browser behaviors */
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document.removeEvents('click');
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document.body.removeEvents('contextmenu');
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},
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/*
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* Tile rendering functions optimized for rendering engines.
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*
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* - In Chrome/webkit, Javascript image data array manipulations are
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* faster than direct Canvas fillStyle, fillRect rendering. In
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* gecko, Javascript array handling is much slower.
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*/
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getTile: function(x, y, width, height, color) {
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var img, data, p, red, green, blue, j, i;
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img = {'x': x, 'y': y, 'width': width, 'height': height,
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'data': []};
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if (Canvas.prefer_js) {
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data = img.data;
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red = color[0];
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green = color[1];
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blue = color[2];
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for (j = 0; j < height; j++) {
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for (i = 0; i < width; i++) {
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p = (i + (j * width) ) * 4;
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img.data[p + 0] = red;
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img.data[p + 1] = green;
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img.data[p + 2] = blue;
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//img.data[p + 3] = 255; // Set Alpha
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}
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}
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} else {
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Canvas.fillRect(x, y, width, height, color);
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}
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return img;
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},
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setTile: function(img, x, y, w, h, color) {
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var data, p, red, green, blue, width, j, i;
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if (Canvas.prefer_js) {
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data = img.data;
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width = img.width;
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red = color[0];
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green = color[1];
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blue = color[2];
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for (j = 0; j < h; j++) {
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for (i = 0; i < w; i++) {
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p = (x + i + ((y + j) * width) ) * 4;
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data[p + 0] = red;
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data[p + 1] = green;
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data[p + 2] = blue;
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//img.data[p + 3] = 255; // Set Alpha
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}
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}
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} else {
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Canvas.fillRect(img.x + x, img.y + y, w, h, color);
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}
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},
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putTile: function(img) {
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if (Canvas.prefer_js) {
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Canvas.rgbxImage(img.x, img.y, img.width, img.height, img.data, 0);
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//Canvas.ctx.putImageData(img, img.x, img.y);
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} else {
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// No-op, under gecko already done by setTile
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}
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},
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rgbxImage: function(x, y, width, height, arr, offset) {
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var img, i, j, data;
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//console.log("rfbxImage: img: " + img + " x: " + x + " y: " + y + " width: " + width + " height: " + height);
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/* Old firefox and Opera don't support createImageData */
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img = Canvas.ctx.getImageData(0, 0, width, height);
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data = img.data;
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for (i=0; i < (width * height * 4); i=i+4) {
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j=i+offset;
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data[i + 0] = arr[j + 0];
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data[i + 1] = arr[j + 1];
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data[i + 2] = arr[j + 2];
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data[i + 3] = 255; // Set Alpha
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}
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Canvas.ctx.putImageData(img, x, y);
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},
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fillRect: function(x, y, width, height, color) {
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var newStyle = "rgb(" + color[0] + "," + color[1] + "," + color[2] + ")";
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if (newStyle !== Canvas.prevStyle) {
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Canvas.ctx.fillStyle = newStyle;
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Canvas.prevStyle = newStyle;
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}
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Canvas.ctx.fillRect(x, y, width, height);
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},
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copyImage: function(old_x, old_y, new_x, new_y, width, height) {
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Canvas.ctx.drawImage($(Canvas.id), old_x, old_y, width, height,
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new_x, new_y, width, height);
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},
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/* Translate DOM key event to keysym value */
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getKeysym: function(e) {
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var evt, keysym;
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evt = e.event || window.event;
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/* Remap modifier and special keys */
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switch ( evt.keyCode ) {
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case 8 : keysym = 0xFF08; break; // BACKSPACE
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case 9 : keysym = 0xFF09; break; // TAB
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case 13 : keysym = 0xFF0D; break; // ENTER
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case 27 : keysym = 0xFF1B; break; // ESCAPE
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case 45 : keysym = 0xFF63; break; // INSERT
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case 46 : keysym = 0xFFFF; break; // DELETE
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case 36 : keysym = 0xFF50; break; // HOME
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case 35 : keysym = 0xFF57; break; // END
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case 33 : keysym = 0xFF55; break; // PAGE_UP
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case 34 : keysym = 0xFF56; break; // PAGE_DOWN
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case 37 : keysym = 0xFF51; break; // LEFT
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case 38 : keysym = 0xFF52; break; // UP
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case 39 : keysym = 0xFF53; break; // RIGHT
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case 40 : keysym = 0xFF54; break; // DOWN
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case 112 : keysym = 0xFFBE; break; // F1
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case 113 : keysym = 0xFFBF; break; // F2
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case 114 : keysym = 0xFFC0; break; // F3
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case 115 : keysym = 0xFFC1; break; // F4
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case 116 : keysym = 0xFFC2; break; // F5
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case 117 : keysym = 0xFFC3; break; // F6
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case 118 : keysym = 0xFFC4; break; // F7
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case 119 : keysym = 0xFFC5; break; // F8
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case 120 : keysym = 0xFFC6; break; // F9
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case 121 : keysym = 0xFFC7; break; // F10
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case 122 : keysym = 0xFFC8; break; // F11
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case 123 : keysym = 0xFFC9; break; // F12
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case 16 : keysym = 0xFFE1; break; // SHIFT
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case 17 : keysym = 0xFFE3; break; // CONTROL
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case 18 : keysym = 0xFFE7; break; // ALT
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default : keysym = evt.keyCode; break;
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}
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/* Remap symbols */
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switch (keysym) {
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case 186 : keysym = 59; break; // ; (IE)
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case 187 : keysym = 61; break; // = (IE)
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case 188 : keysym = 44; break; // , (Mozilla, IE)
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case 109 : // - (Mozilla)
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if (Browser.Engine.gecko) {
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keysym = 45; }
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break;
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case 189 : keysym = 45; break; // - (IE)
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case 190 : keysym = 46; break; // . (Mozilla, IE)
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case 191 : keysym = 47; break; // / (Mozilla, IE)
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case 192 : keysym = 96; break; // ` (Mozilla, IE)
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case 219 : keysym = 91; break; // [ (Mozilla, IE)
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case 220 : keysym = 92; break; // \ (Mozilla, IE)
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case 221 : keysym = 93; break; // ] (Mozilla, IE)
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case 222 : keysym = 39; break; // ' (Mozilla, IE)
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}
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/* Remap shifted and unshifted keys */
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if (!!evt.shiftKey) {
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switch (keysym) {
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case 48 : keysym = 41 ; break; // ) (shifted 0)
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case 49 : keysym = 33 ; break; // ! (shifted 1)
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case 50 : keysym = 64 ; break; // @ (shifted 2)
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case 51 : keysym = 35 ; break; // # (shifted 3)
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case 52 : keysym = 36 ; break; // $ (shifted 4)
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case 53 : keysym = 37 ; break; // % (shifted 5)
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case 54 : keysym = 94 ; break; // ^ (shifted 6)
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case 55 : keysym = 38 ; break; // & (shifted 7)
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case 56 : keysym = 42 ; break; // * (shifted 8)
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case 57 : keysym = 40 ; break; // ( (shifted 9)
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case 59 : keysym = 58 ; break; // : (shifted `)
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case 61 : keysym = 43 ; break; // + (shifted ;)
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case 44 : keysym = 60 ; break; // < (shifted ,)
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case 45 : keysym = 95 ; break; // _ (shifted -)
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case 46 : keysym = 62 ; break; // > (shifted .)
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case 47 : keysym = 63 ; break; // ? (shifted /)
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case 96 : keysym = 126; break; // ~ (shifted `)
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case 91 : keysym = 123; break; // { (shifted [)
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case 92 : keysym = 124; break; // | (shifted \)
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case 93 : keysym = 125; break; // } (shifted ])
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case 39 : keysym = 34 ; break; // " (shifted ')
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}
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} else if ((keysym >= 65) && (keysym <=90)) {
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/* Remap unshifted A-Z */
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keysym += 32;
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}
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return keysym;
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}
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};
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