2 * Copyright (c) 2012 The Chromium Authors. All rights reserved.
3 * Use of this source code is governed by a BSD-style license that can be
4 * found in the LICENSE file.
7 // Checking for "chrome.app.runtime" availability allows this Chrome app code to
8 // be tested in a regular web page (like tests/manual.html). Checking for
9 // "chrome" and "chrome.app" availability further allows this code to be tested
10 // in non-Chrome browsers, which is useful for example to test touch support
11 // with a non-Chrome touch device.
12 if (typeof chrome !== 'undefined' && chrome.app && chrome.app.runtime) {
13 var showCalculatorWindow = function () {
14 chrome.app.window.create('calculator.html', {
15 defaultWidth: 243, minWidth: 243, maxWidth: 243,
16 defaultHeight: 380, minHeight: 380, maxHeight: 380,
18 }, function(appWindow) {
19 appWindow.contentWindow.onload = function() {
20 new Controller(new Model(9), new View(appWindow.contentWindow));
25 chrome.app.runtime.onLaunched.addListener(showCalculatorWindow);
28 function Controller(model, view) {
29 this.inputs = this.defineInputs_();
32 this.view.onButton = function(button) {
33 this.handleInput_(this.inputs.byButton[button]);
35 this.view.onKey = function(key) {
36 this.handleInput_(this.inputs.byKey[key]);
41 Controller.prototype.defineInputs_ = function() {
42 var inputs = {byButton: {}, byKey: {}};
43 inputs.byButton['zero'] = inputs.byKey['48'] = inputs.byKey['96'] = '0';
44 inputs.byButton['one'] = inputs.byKey['49'] = inputs.byKey['97'] = '1';
45 inputs.byButton['two'] = inputs.byKey['50'] = inputs.byKey['98'] = '2';
46 inputs.byButton['three'] = inputs.byKey['51'] = inputs.byKey['99'] = '3';
47 inputs.byButton['four'] = inputs.byKey['52'] = inputs.byKey['100'] = '4';
48 inputs.byButton['five'] = inputs.byKey['53'] = inputs.byKey['101'] = '5';
49 inputs.byButton['six'] = inputs.byKey['54'] = inputs.byKey['102'] = '6';
50 inputs.byButton['seven'] = inputs.byKey['55'] = inputs.byKey['103'] = '7';
51 inputs.byButton['eight'] = inputs.byKey['56'] = inputs.byKey['104'] = '8';
52 inputs.byButton['nine'] = inputs.byKey['57'] = inputs.byKey['105'] = '9';
53 inputs.byButton['point'] = inputs.byKey['190'] = inputs.byKey['110'] = '.';
54 inputs.byButton['add'] = inputs.byKey['^187'] = inputs.byKey['107'] = '+';
55 inputs.byButton['subtract'] = inputs.byKey['189'] = inputs.byKey['109'] = '-';
56 inputs.byButton['multiply'] = inputs.byKey['^56'] = inputs.byKey['106'] = '*';
57 inputs.byButton['divide'] = inputs.byKey['191'] = inputs.byKey['111'] = '/';
58 inputs.byButton['equals'] = inputs.byKey['187'] = inputs.byKey['13'] = '=';
59 inputs.byButton['negate'] = inputs.byKey['32'] = '+ / -';
60 inputs.byButton['clear'] = inputs.byKey['67'] = 'AC';
61 inputs.byButton['back'] = inputs.byKey['8'] = 'back';
66 Controller.prototype.handleInput_ = function(input) {
67 var values, accumulator, operator, operand;
69 values = this.model.handle(input);
70 accumulator = values.accumulator;
71 operator = values.operator;
72 operand = values.operand;
74 this.view.clearDisplay({operand: '0'});
75 } else if (input === '=') {
76 this.view.addResults({accumulator: accumulator, operand: accumulator});
77 } else if (input.match(/^[+*/-]$/)) {
78 this.updateValues_({accumulator: accumulator});
79 this.view.addValues({operator: values.operator});
80 } else if (!this.updateValues_({operator: operator, operand: operand})) {
81 this.view.addValues({operator: operator, operand: operand});
87 Controller.prototype.updateValues_ = function(values) {
88 // Values which are "finalized" (which have an accumulator value) shouldn't
89 // and won't be updated, and this method will return false for them.
90 var before = this.view.getValues();
91 var after = !before.accumulator ? values : {};
93 accumulator: this.getUpdatedValue_(before, after, 'accumulator'),
94 operator: this.getUpdatedValue_(before, after, 'operator'),
95 operand: this.getUpdatedValue_(before, after, 'operand', !before.operator)
97 return !before.accumulator;
101 Controller.prototype.getUpdatedValue_ = function(before, after, key, zero) {
102 var value = (typeof after[key] !== 'undefined') ? after[key] : before[key];
103 return zero ? (value || '0') : value;