/usr/lib/ubuntu-ui-toolkit/examples/calculator/components/calculator.js is in ubuntu-ui-toolkit-examples 0.1.46+14.04.20140408.1-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright 2013 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Zsombor Egri <zsombor.egri@canonical.com>
*/
.pragma library
function Calculator(textInput, memoryIndicator) {
var operationStage = 0; // 0-lvalue, 1-rvalue
var lvalue = 0.0;
var rvalue = 0.0;
var lastOperation = -1;
var memory = 0.0;
var clearInputNext = true;
textInput.text = lvalue;
memoryIndicator.visible = false;
function setValue(value) {
if (operationStage === 0) {
lvalue = parseFloat(value);
return lvalue;
} else if (operationStage === 1) {
rvalue = parseFloat(value);
return rvalue;
}
}
function value() {
return (operationStage === 0) ? lvalue : rvalue;
}
function clear() {
operationStage = 1;
lvalue = rvalue = 0;
lastOperation = -1;
textInput.text = 0.0;
}
function memClear() {
memory = 0;
memoryIndicator.visible = false;
}
function memRecall() {
if (memory <= 0)
return;
textInput.text = setValue(memory);
}
function memAdd() {
memory += value();
textInput.text = setValue(memory);
memoryIndicator.visible = true;
}
function memDec() {
memory -= value();
textInput.text = setValue(memory);
memoryIndicator.visible = true;
}
// arythmetic functions
function add() {
lvalue += rvalue;
}
function dec() {
lvalue -= rvalue;
}
function mul() {
lvalue *= rvalue;
}
function div() {
lvalue /= rvalue;
}
function sign() {
textInput.text = setValue(-value());
}
function invert() {
textInput.text = setValue(1/value());
}
function percent() {
textInput.text = setValue(value() / 100);
}
function sqr() {
textInput.text = setValue(Math.pow(value(), 2));
}
function cube() {
textInput.text = setValue(Math.pow(value(), 3));
}
function power() {
lvalue = Math.pow(lvalue, rvalue);
}
function powerOf2() {
textInput.text = setValue(Math.pow(2, value()));
}
function factorial() {
var rval = 1;
for (var i = 2; i <= value(); i++) {
rval *= i;
}
textInput.text = setValue(rval);
}
function sqrt() {
textInput.text = setValue(Math.sqrt(value()));
}
function ln() {
textInput.text = setValue(Math.log(value()));
}
function exp()
{
textInput.text = setValue(Math.exp(value()));
}
function sin() {
textInput.text = setValue(Math.sin(value()));
}
function cos() {
textInput.text = setValue(Math.cos(value()));
}
function tan() {
textInput.text = setValue(Math.tan(value()));
}
function cot() {
textInput.text = setValue(1/Math.tan(value()));
}
function sec() {
textInput.text = setValue(1/Math.cos(value()));
}
function csc() {
textInput.text = setValue(1/Math.sin(value()));
}
var operations = [
{code: "+", operationFunc: add},
{code: "-", operationFunc: dec},
{code: "*", operationFunc: mul},
{code: "/", operationFunc: div},
{code: "+/-", controlFunc: sign},
{code: "c", controlFunc: clear},
{code: "mc", controlFunc: memClear},
{code: "mr", controlFunc: memRecall},
{code: "m+", controlFunc: memAdd},
{code: "m-", controlFunc: memDec},
{code: "%", controlFunc: percent},
{code: "1/x", controlFunc: invert},
{code: "x!", controlFunc: factorial},
{code: "x^2", controlFunc: sqr},
{code: "x^3", controlFunc: cube},
{code: "x^y", operationFunc: power},
{code: "2^x", controlFunc: powerOf2},
{code: "sqrt", controlFunc: sqrt},
{code: "ln", controlFunc: ln},
{code: "e^x", controlFunc: exp},
{code: "sin()", controlFunc: sin},
{code: "cos()", controlFunc: cos},
{code: "tan()", controlFunc: tan},
{code: "cot()", controlFunc: cot},
{code: "sec()", controlFunc: sec},
{code: "csc()", controlFunc: csc},
];
this.execute = function (operation) {
if (operation === "=") {
if (lastOperation > -1) {
operations[lastOperation].operationFunc();
textInput.text = lvalue;
}
operationStage = 0;
clearInputNext = true;
} else {
for (var i = 0; i < operations.length; i++) {
if (operations[i].code === operation) {
if (operations[i].operationFunc) {
clearInputNext = true;
if (operations[i].singleOp) {
operations[i].operationFunc();
return;
}
lastOperation = i;
if (operationStage === 0) {
operationStage = 1;
} else if (operationStage === 1) {
// evaluate and continue receiving rvalue
operations[i].operationFunc(lvalue, rvalue);
textInput.text = lvalue;
}
} else if (operations[i].controlFunc) {
operations[i].controlFunc();
clearInputNext = true;
}
return;
}
}
// if no opeartion was performed, add operation to input
if (clearInputNext) {
clearInputNext = false;
textInput.text = "";
}
textInput.text = setValue(textInput.text + operation);
}
}
}
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