Put this project under version control, finally.
This commit is contained in:
John "Elwin" Edwards
commit
8dec6dff87
11 changed files with 3461 additions and 0 deletions
478
shterm.js
Normal file
478
shterm.js
Normal file
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@ -0,0 +1,478 @@
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// A state machine that keeps track of polling the server.
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var ajaxstate = {
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state: 0,
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timerID: null,
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clear: function () {
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if (this.timerID != null) {
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||||
window.clearTimeout(this.timerID);
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this.timerID = null;
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}
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},
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set: function (ms) {
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this.clear();
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this.timerID = window.setTimeout(getData, ms);
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},
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gotdata: function () {
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this.set(100);
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this.state = 0;
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},
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gotnothing: function () {
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if (this.state == 0) {
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this.set(100);
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this.state = 1;
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}
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else if (this.state == 1) {
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this.set(300);
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this.state = 2;
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}
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else if (this.state == 2) {
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this.set(1000);
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this.state = 3;
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}
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else {
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this.set(5000);
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this.state = 3;
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}
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},
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posted: function () {
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this.set(100);
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this.state = 0;
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}
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};
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function writeData(hexstr) {
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var codenum;
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var codes = [];
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var nc;
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var u8wait = 0; /* Stores bits from previous bytes of multibyte sequences. */
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var expect = 0; /* The number of 10------ bytes expected. */
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/* UTF-8 translation. */
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for (var i = 0; i < hexstr.length; i += 2) {
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nc = Number("0x" + hexstr.substr(i, 2));
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if (nc < 0x7F) {
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/* 0------- */
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codes.push(nc);
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/* Any incomplete sequence will be discarded. */
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u8wait = 0;
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expect = 0;
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}
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else if (nc < 0xC0) {
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/* 10------ : part of a multibyte sequence */
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if (expect > 0) {
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u8wait <<= 6;
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u8wait += (nc & 0x3F);
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expect--;
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if (expect == 0) {
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codes.push(u8wait);
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u8wait = 0;
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}
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}
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else {
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/* Assume an initial byte was missed. */
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u8wait = 0;
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}
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}
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/* These will all discard any incomplete sequence. */
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else if (nc < 0xE0) {
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/* 110----- : introduces 2-byte sequence */
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u8wait = (nc & 0x1F);
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expect = 1;
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}
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else if (nc < 0xF0) {
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/* 1110---- : introduces 3-byte sequence */
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u8wait = (nc & 0x0F);
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expect = 2;
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}
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else if (nc < 0xF8) {
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/* 11110--- : introduces 4-byte sequence */
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u8wait = (nc & 0x07);
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expect = 3;
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}
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else if (nc < 0xFC) {
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/* 111110-- : introduces 5-byte sequence */
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u8wait = (nc & 0x03);
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expect = 4;
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}
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else if (nc < 0xFE) {
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/* 1111110- : introduces 6-byte sequence */
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u8wait = (nc & 0x01);
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expect = 5;
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}
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else {
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/* 1111111- : should never appear */
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u8wait = 0;
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expect = 0;
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}
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/* Supporting all 31 bits is probably overkill... */
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}
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termemu.write(codes);
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return;
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}
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function getData() {
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if (!termemu.alive)
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return;
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var datareq = new XMLHttpRequest();
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datareq.onreadystatechange = function () {
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if (datareq.readyState == 4 && datareq.status == 200) {
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var datalines = datareq.responseText.split("\n");
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if (!datalines[0]) {
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return;
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}
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else if (datalines[0] == "E1") {
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termemu.alive = false;
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return;
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}
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else if (datalines[0].charAt(0) != 'd') {
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return;
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}
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if (datalines[1]) {
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writeData(datalines[1]);
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ajaxstate.gotdata();
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}
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else {
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ajaxstate.gotnothing();
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}
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return;
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}
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};
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datareq.open('GET', '/feed', true);
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datareq.send(null);
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return;
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}
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function postResponseHandler() {
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if (this.readyState == 4 && this.status == 200) {
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var datalines = this.responseText.split("\n");
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if (!datalines[0])
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return;
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else if (datalines[0] == "E1") {
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termemu.alive = false;
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return;
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}
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else if (datalines[0].charAt(0) != "d")
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return;
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/* It is a data message */
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if (datalines[1]) {
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writeData(datalines[1]);
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}
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ajaxstate.posted();
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return;
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}
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}
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function sendback(str) {
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/* For responding to terminal queries. */
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var datareq = new XMLHttpRequest();
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datareq.onreadystatechange = postResponseHandler;
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datareq.open('POST', '/feed', true);
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datareq.send("keys=" + str);
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return;
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}
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/* ASCII values of keys 0-9. */
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var numShifts = [41, 33, 64, 35, 36, 37, 94, 38, 42, 40];
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var keyHexCodes = {
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init: function () {
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this[KeyboardEvent.DOM_VK_RETURN] = ["0d", "0d"];
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this[KeyboardEvent.DOM_VK_SPACE] = ["20", "20"];
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this[KeyboardEvent.DOM_VK_TAB] = ["09", "09"];
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this[KeyboardEvent.DOM_VK_BACK_QUOTE] = ["60", "7e"];
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this[KeyboardEvent.DOM_VK_OPEN_BRACKET] = ["5b", "7b"];
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this[KeyboardEvent.DOM_VK_CLOSE_BRACKET] = ["5d", "7d"];
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this[KeyboardEvent.DOM_VK_BACK_SLASH] = ["5c", "7c"];
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this[KeyboardEvent.DOM_VK_SEMICOLON] = ["3b", "3a"];
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this[KeyboardEvent.DOM_VK_QUOTE] = ["27", "22"];
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this[KeyboardEvent.DOM_VK_COMMA] = ["2c", "3c"];
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this[KeyboardEvent.DOM_VK_PERIOD] = ["2e", "3e"];
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this[KeyboardEvent.DOM_VK_SLASH] = ["2f", "3f"];
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this[KeyboardEvent.DOM_VK_EQUALS] = ["3d", "2b"];
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this[KeyboardEvent.DOM_VK_SUBTRACT] = ["2d", "5f"];
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this[KeyboardEvent.DOM_VK_BACK_SPACE] = ["08", "08"];
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this[KeyboardEvent.DOM_VK_ESCAPE] = ["1b", "1b"];
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this[KeyboardEvent.DOM_VK_PAGE_UP] = ["1b5b357e", "1b5b357e"];
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this[KeyboardEvent.DOM_VK_PAGE_DOWN] = ["1b5b367e", "1b5b367e"];
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this.appCursor(false);
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this.appKeypad(false);
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},
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/* Multi-char control sequences! Neat! */
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appCursor: function (on) {
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/* Aren't special keys vile? */
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if (on) {
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this[KeyboardEvent.DOM_VK_LEFT] = ["1b4f44", "1b4f44"];
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this[KeyboardEvent.DOM_VK_RIGHT] = ["1b4f43", "1b4f43"];
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this[KeyboardEvent.DOM_VK_UP] = ["1b4f41", "1b4f41"];
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this[KeyboardEvent.DOM_VK_DOWN] = ["1b4f42", "1b4f42"];
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this[KeyboardEvent.DOM_VK_END] = ["1b4f46", "1b4f46"];
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this[KeyboardEvent.DOM_VK_HOME] = ["1b4f48", "1b4f48"];
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}
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else {
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this[KeyboardEvent.DOM_VK_LEFT] = ["1b5b44", "1b5b44"];
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this[KeyboardEvent.DOM_VK_RIGHT] = ["1b5b43", "1b5b43"];
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this[KeyboardEvent.DOM_VK_UP] = ["1b5b41", "1b5b41"];
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this[KeyboardEvent.DOM_VK_DOWN] = ["1b5b42", "1b5b42"];
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this[KeyboardEvent.DOM_VK_END] = ["1b5b46", "1b5b46"];
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this[KeyboardEvent.DOM_VK_HOME] = ["1b5b48", "1b5b48"];
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}
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},
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appKeypad: function (on) {
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/* In theory, these should produce either numerals or the k[a-c][1-3]
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* sequences. Since we can't count on the terminfo description actually
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* containing those sequences, pretend they're just arrow keys etc.
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*/
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this[KeyboardEvent.DOM_VK_NUMPAD1] = ["1b4f46", "1b4f46"];
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this[KeyboardEvent.DOM_VK_NUMPAD2] = ["1b4f42", "1b4f42"];
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this[KeyboardEvent.DOM_VK_NUMPAD3] = ["1b5b367e", "1b5b367e"];
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this[KeyboardEvent.DOM_VK_NUMPAD4] = ["1b4f44", "1b4f44"];
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this[KeyboardEvent.DOM_VK_NUMPAD5] = ["1b5b45", "1b5b45"];
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this[KeyboardEvent.DOM_VK_NUMPAD6] = ["1b4f43", "1b4f43"];
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this[KeyboardEvent.DOM_VK_NUMPAD7] = ["1b4f48", "1b4f48"];
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this[KeyboardEvent.DOM_VK_NUMPAD8] = ["1b4f41", "1b4f41"];
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this[KeyboardEvent.DOM_VK_NUMPAD9] = ["1b5b357e", "1b5b357e"];
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return;
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}
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};
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function sendkey(ev) {
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var keynum = ev.keyCode;
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var code;
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if (keynum >= ev.DOM_VK_A && keynum <= ev.DOM_VK_Z) {
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/* Letters. This assumes the codes are 65-90. */
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if (ev.ctrlKey)
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keynum -= 64;
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else if (!ev.shiftKey)
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keynum += 32;
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code = keynum.toString(16);
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if (code.length < 2)
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code = "0" + code;
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}
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else if (keynum >= ev.DOM_VK_0 && keynum <= ev.DOM_VK_9) {
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/* The number row. */
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if (ev.shiftKey) {
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code = numShifts[keynum - 48].toString(16);
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}
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else {
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code = keynum.toString(16);
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}
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}
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else if (keynum in keyHexCodes) {
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if (ev.shiftKey)
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code = keyHexCodes[keynum][1];
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else
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code = keyHexCodes[keynum][0];
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}
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else if (keynum == ev.DOM_VK_SHIFT || keynum == ev.DOM_VK_CONTROL ||
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keynum == ev.DOM_VK_ALT || keynum == ev.DOM_VK_CAPS_LOCK) {
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return;
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}
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else {
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debug(1, "Ignoring keycode " + keynum);
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return;
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}
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if (termemu.alive)
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ev.preventDefault();
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var datareq = new XMLHttpRequest();
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datareq.onreadystatechange = postResponseHandler;
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datareq.open('POST', '/feed', true);
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datareq.send("keys=" + code);
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//dkey(code);
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return;
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}
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var charshifts = { '-': "5f", '=': "2b", '[': "7b", ']': "7d", '\\': "7c",
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';': "3a", '\'': "22", ',': "3c", '.': "3e", '/': "3f", '`': "7e"
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}
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function vkey(c) {
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var keystr;
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if (c.match(/^[a-z]$/)) {
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if (termemu.ctrlp()) {
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var n = c.charCodeAt(0) - 96;
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keystr = n.toString(16);
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if (keystr.length < 2)
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keystr = "0" + keystr;
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}
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else if (termemu.shiftp())
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keystr = c.toUpperCase().charCodeAt(0).toString(16);
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else
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keystr = c.charCodeAt(0).toString(16);
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}
|
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else if (c.match(/^[0-9]$/)) {
|
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if (termemu.shiftp())
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keystr = numShifts[c.charCodeAt(0) - 48].toString(16);
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else
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keystr = c.charCodeAt(0).toString(16);
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}
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else if (c == '\n')
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keystr = "0a";
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else if (c == '\t')
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keystr = "09";
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else if (c == '\b')
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keystr = "08";
|
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else if (c == ' ')
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keystr = "20";
|
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else if (c in charshifts) {
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if (termemu.shiftp())
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keystr = charshifts[c];
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else
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keystr = c.charCodeAt(0).toString(16);
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}
|
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else
|
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return;
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//writeData("Sending " + keystr);
|
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var datareq = new XMLHttpRequest();
|
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datareq.onreadystatechange = postResponseHandler;
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datareq.open('POST', '/feed', true);
|
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datareq.send("keys=" + keystr);
|
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return;
|
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}
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|
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function setup() {
|
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keyHexCodes.init();
|
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termemu.init("termwrap");
|
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setTitle("Not connected.");
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||||
return;
|
||||
}
|
||||
|
||||
function toggleshift() {
|
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termemu.toggleshift();
|
||||
keydiv = document.getElementById("shiftkey");
|
||||
if (termemu.shiftp())
|
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keydiv.className = "keysel";
|
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else
|
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keydiv.className = "key";
|
||||
return;
|
||||
}
|
||||
|
||||
function togglectrl() {
|
||||
termemu.togglectrl();
|
||||
keydiv = document.getElementById("ctrlkey");
|
||||
if (termemu.ctrlp())
|
||||
keydiv.className = "keysel";
|
||||
else
|
||||
keydiv.className = "key";
|
||||
return;
|
||||
}
|
||||
|
||||
function login() {
|
||||
if (termemu.alive)
|
||||
return;
|
||||
var req = new XMLHttpRequest();
|
||||
req.onreadystatechange = function () {
|
||||
if (req.readyState == 4 && req.status == 200) {
|
||||
var datalines = req.responseText.split("\n");
|
||||
if (datalines[0] == 'l1') {
|
||||
/* Success */
|
||||
termemu.alive = true;
|
||||
setTitle("Logged in");
|
||||
debug(1, "Logged in with id " + datalines[1]);
|
||||
getData();
|
||||
return;
|
||||
}
|
||||
return;
|
||||
}
|
||||
};
|
||||
req.open('POST', '/login', true);
|
||||
req.send("login=login");
|
||||
return;
|
||||
}
|
||||
|
||||
function stop() {
|
||||
var req = new XMLHttpRequest();
|
||||
req.onreadystatechange = function () {
|
||||
if (req.readyState == 4 && req.status == 200) {
|
||||
var datalines = req.responseText.split("\n");
|
||||
/* Figure out whether or not it worked. */
|
||||
termemu.alive = false;
|
||||
return;
|
||||
}
|
||||
};
|
||||
req.open('POST', '/feed', true);
|
||||
req.send("quit=quit");
|
||||
return;
|
||||
}
|
||||
|
||||
function setTitle(tstr) {
|
||||
var titlespan = document.getElementById("ttitle");
|
||||
var tnode = document.createTextNode(tstr);
|
||||
if (titlespan.childNodes.length == 0)
|
||||
titlespan.appendChild(tnode);
|
||||
else
|
||||
titlespan.replaceChild(tnode, titlespan.childNodes[0]);
|
||||
return;
|
||||
}
|
||||
|
||||
function debug(level, msg) {
|
||||
if (level < debugSuppress)
|
||||
return;
|
||||
var msgdiv = document.createElement("div");
|
||||
var msgtext = document.createTextNode(msg);
|
||||
msgdiv.appendChild(msgtext);
|
||||
document.getElementById("debug").appendChild(msgdiv);
|
||||
return;
|
||||
}
|
||||
|
||||
/* This should be a termemu method. */
|
||||
function textsize(larger) {
|
||||
var cssSize = document.getElementById("term").style.fontSize;
|
||||
if (!cssSize)
|
||||
return;
|
||||
var match = cssSize.match(/\d*/);
|
||||
if (!match)
|
||||
return;
|
||||
var csize = Number(match[0]);
|
||||
var nsize;
|
||||
if (larger) {
|
||||
if (csize >= 48)
|
||||
nsize = 48;
|
||||
else if (csize >= 20)
|
||||
nsize = csize + 4;
|
||||
else if (csize >= 12)
|
||||
nsize = csize + 2;
|
||||
else if (csize >= 8)
|
||||
nsize = csize + 1;
|
||||
else
|
||||
nsize = 8;
|
||||
}
|
||||
else {
|
||||
if (csize <= 8)
|
||||
nsize = 8;
|
||||
else if (csize <= 12)
|
||||
nsize = csize - 1;
|
||||
else if (csize <= 20)
|
||||
nsize = csize - 2;
|
||||
else if (csize <= 48)
|
||||
nsize = csize - 4;
|
||||
else
|
||||
nsize = 48;
|
||||
}
|
||||
document.getElementById("term").style.fontSize = nsize.toString() + "px";
|
||||
termemu.resize();
|
||||
debug(1, "Changing font size to " + nsize.toString());
|
||||
return;
|
||||
}
|
||||
|
||||
function bell(on) {
|
||||
var imgnode = document.getElementById("bell");
|
||||
if (on) {
|
||||
imgnode.style.visibility = "visible";
|
||||
window.setTimeout(bell, 1500, false);
|
||||
}
|
||||
else
|
||||
imgnode.style.visibility = "hidden";
|
||||
return;
|
||||
}
|
||||
|
||||
function dkey(codestr) {
|
||||
var dstr = "Keystring: ";
|
||||
for (var i = 0; i < codestr.length; i += 2) {
|
||||
code = Number("0x" + codestr.substr(i, 2));
|
||||
if (code < 32 || (code >= 127 && code < 160))
|
||||
dstr += "\\x" + code.toString(16);
|
||||
else
|
||||
dstr += String.fromCharCode(code);
|
||||
}
|
||||
debug(1, dstr);
|
||||
return;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue