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w3270.html
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<html>
<head>
<meta charset="utf-8">
<style>
html, body {
width: 100%;
height: 100%;
}
body {
margin: 0px;
background-color: black;
}
div.terminal {
white-space: pre;
font-family: monospace;
font-size: 12pt;
color: red;
cursor: default;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script>
function executeCommand(command, callback) {
var request = JSON.stringify({command: command + '\n'});
$.ajax({
type: 'POST',
url: '/',
dataType: 'json',
data: request,
success: callback
});
}
function moveCursor(row, column) {
var rows = document.querySelectorAll('div.terminal div');
if (this.cursorRow != undefined && this.cursorColumn != undefined) {
var columns = rows[this.cursorRow].querySelectorAll('span');
var cell = columns[this.cursorColumn];
var foreground = cell.style.color;
var background = cell.style.backgroundColor;
cell.style.color = background;
cell.style.backgroundColor = foreground;
if (cell.dataset.nondisplay) {
cell.style.visibility = 'hidden';
}
}
if (row < 0) {
row = rows.length + row % rows.length;
} else if (row >= rows.length) {
row = row % rows.length;
}
var columns = rows[row].querySelectorAll('span');
if (column < 0) {
column = columns.length + column % columns.length;
} else if (column >= columns.length) {
column = column % columns.length;
}
var cell = columns[column];
var foreground = cell.style.color;
var background = cell.style.backgroundColor;
if (!background) {
background = 'black';
}
cell.style.color = background;
cell.style.backgroundColor = foreground;
if (cell.dataset.nondisplay) {
cell.style.visibility = '';
}
this.cursorRow = row;
this.cursorColumn = column;
}
function setCharacter(row, column, character) {
var rows = document.querySelectorAll('div.terminal div');
var columns = rows[row].querySelectorAll('span');
var cell = columns[column];
if (cell.dataset.protected) {
return false;
}
cell.innerText = character;
return true;
}
$(window).keypress(function(event) {
if (event.which === 0) {
return;
}
var character = String.fromCharCode(event.which);
if (!character.match(/[ a-zA-Z0-9`~!@#$%^&*()_+\-=[\]{};':",.\/<>?\\|]/)) {
return;
}
var row = this.cursorRow;
var column = this.cursorColumn;
if (!setCharacter(this.cursorRow, this.cursorColumn, character)) {
return;
}
column++;
moveCursor(row, column);
executeCommand('String("' + character + '")');
});
$(window).keydown(function(event) {
var row = this.cursorRow;
var column = this.cursorColumn;
switch (event.keyCode) {
case 8: // backspace
event.preventDefault();
var rows = document.body.querySelectorAll('div.terminal div');
var columns = rows[row].querySelectorAll('span');
if (columns[column - 1].dataset.fieldStart) {
break;
}
column--;
moveCursor(row, column);
setCharacter(this.cursorRow, this.cursorColumn, ' ');
executeCommand('BackSpace()', function() {
executeCommand('Delete()');
});
break;
case 9: // tab
event.preventDefault();
executeCommand('Tab()', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 13: // enter
executeCommand('Enter()', function() {
executeCommand('Wait(1000, InputField)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
});
break;
case 37: // left
column--;
moveCursor(row, column);
executeCommand('Left()');
break;
case 38: // up
row--;
moveCursor(row, column);
executeCommand('Up()');
break;
case 39: // right
column++;
moveCursor(row, column);
executeCommand('Right()');
break;
case 40: // down
row++;
moveCursor(row, column);
executeCommand('Down()');
break;
case 46: // delete
event.preventDefault();
executeCommand('Delete()', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 112: // f1
event.preventDefault();
executeCommand('PF(1)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 113: // f2
event.preventDefault();
executeCommand('PF(2)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 114: // f3
event.preventDefault();
executeCommand('PF(3)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 115: // f4
event.preventDefault();
executeCommand('PF(4)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 116: // f5
event.preventDefault();
executeCommand('PF(5)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 117: // f6
event.preventDefault();
executeCommand('PF(6)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 118: // f7
event.preventDefault();
executeCommand('PF(7)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 119: // f8
event.preventDefault();
executeCommand('PF(8)', function(response) {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 120: // f9
event.preventDefault();
executeCommand('PF(9)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 121: // f10
event.preventDefault();
executeCommand('PF(10)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 122: // f11
event.preventDefault();
executeCommand('PF(11)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
case 123: // f12
event.preventDefault();
executeCommand('PF(12)', function() {
executeCommand('ReadBuffer()', processBuffer);
});
break;
}
});
function unicode(array) {
var result = '';
var index = 0;
var length = array.length;
while (index < length) {
var byte = array[index++];
switch (byte >> 4) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
result += String.fromCharCode(array[index - 1]);
break;
case 12: case 13:
var left = array[index++];
result += String.fromCharCode(((byte & 0x1f) << 6) | (left & 0x3f));
break;
case 14:
var left = array[index++];
var right = array[index++];
result += String.fromCharCode(((byte & 0x0f) << 12) | ((left & 0x3f) << 6) | ((right & 0x3f) << 0));
break;
}
}
return result;
}
function processBuffer(response) {
var status = response.status.split(' ');
var row = parseInt(status[8]);
var column = parseInt(status[9]);
var terminalBlock = document.createElement('div');
terminalBlock.className = 'terminal';
var field = {};
for (var lineIndex = 0; lineIndex < response.data.length; lineIndex++) {
var line = response.data[lineIndex];
var lineBlock = document.createElement('div');
var array = line.split(' ');
for (var dataIndex = 0; dataIndex < array.length; dataIndex++) {
var data = array[dataIndex];
var character = undefined;
var attributes = undefined;
if (data.length == 2) {
var code = parseInt(data, 16);
character = code ? String.fromCharCode(parseInt(data, 16)) : ' ';
} else {
character = ' ';
var match = data.match(/S([FA])\((.*?)\)/);
if (match) {
attributes = {};
if (match[1] == 'F') {
field = {};
} else if (match[1] == 'A') {
character = undefined;
}
attributes.type = match[1];
match[2].split(',').forEach(function(attribute) {
var pair = attribute.split('=');
attributes[parseInt(pair[0], 16)] = parseInt(pair[1], 16);
});
if (0xc0 in attributes) {
field.protected = Boolean(attributes[0xc0] & 0x20);
field.bright = Boolean(attributes[0xc0] & 0x08);
field.nondisplay = Boolean((attributes[0xc0] & 0x0c) == 0x0c);
}
if (0x41 in attributes) {
if (attributes[0x41] == 0xf0) {
character = undefined;
}
field.reverse = attributes[0x41] == 0xf2;
field.underscore = attributes[0x41] == 0xf4;
}
if (0x42 in attributes) {
var color = undefined;
switch (attributes[0x42]) {
case 0xf0: color = 'deepskyblue'; break;
case 0xf1: color = 'dodgerblue '; break;
case 0xf2: color = 'red'; break;
case 0xf3: color = 'white'; break;
case 0xf4: color = 'lime'; break;
case 0xf5: color = 'turquoise'; break;
case 0xf6: color = 'yellow'; break;
case 0xf7: color = 'white'; break;
case 0xf8: color = 'black'; break;
case 0xf9: color = 'white'; break;
case 0xfa: color = 'white'; break;
case 0xfb: color = 'white'; break;
case 0xfc: color = 'white'; break;
case 0xfd: color = 'white'; break;
case 0xfe: color = 'white'; break;
case 0xff: color = 'white'; break;
}
field.color = color;
}
} else {
var code = [];
for (var index = 0; index < data.length; index += 2) {
code.push(parseInt(data.substr(index, 2), 16));
}
character = unicode(code);
}
}
if (character) {
var span = document.createElement('span');
span.innerHTML = character;
if (!field.color) {
if (field.protected === false) {
if (field.bright === false) {
field.color = 'lime';
} else if (field.bright === true) {
field.color = 'red';
}
} else if (field.protected === true) {
if (field.bright === false) {
field.color = 'turquoise';
} else if (field.bright === true) {
field.color = 'white';
}
}
}
if (!field.color) {
field.color = 'red';
}
if (!attributes && field.reverse) {
span.style.color = 'black';
span.style.backgroundColor = field.color;
} else {
span.style.color = field.color;
}
if (field.protected) {
span.dataset.protected = true;
}
if (field.nondisplay) {
span.dataset.nondisplay = true;
span.style.visibility = 'hidden';
}
if (!attributes && field.underscore) {
span.style.boxShadow = 'inset 0 -1px 0 0';
span.style.mozBoxShadow = span.style.boxShadow;
span.style.webkitBoxShadow = span.style.boxShadow;
}
if (attributes && attributes.type == 'F') {
span.dataset.fieldStart = true;
}
lineBlock.appendChild(span);
}
}
terminalBlock.appendChild(lineBlock);
}
terminalBlock.onclick = function(event) {
var cell = event.target;
var column = 0;
var node = cell;
while (node = node.previousSibling) {
column++;
}
var row = 0;
node = cell.parentNode;
while (node = node.previousSibling) {
row++;
}
moveCursor(row, column);
executeCommand('MoveCursor(' + row + ',' + column + ')');
};
if (!document.body.childNodes.length) {
document.body.appendChild(terminalBlock);
} else {
document.body.replaceChild(terminalBlock, document.body.childNodes[0]);
}
cursorRow = undefined;
cursorColumn = undefined;
moveCursor(row, column);
}
$(document).ready(function() {
executeCommand('', function(response) {
if (response.status.split(' ')[3] == 'N') {
var hostname = prompt('Host name');
executeCommand('Connect("' + hostname + '")', function(response) {
executeCommand('ReadBuffer()', processBuffer);
});
} else {
executeCommand('ReadBuffer()', processBuffer);
}
});
});
</script>
</head>
<body>
</body>
</html>