AutoJs源码-190620-计算器

/* 软件作者：https://xuhss.com/oxox/pro */ /** * name: 一个图形界面计算器 * by: 板神 * time: 2019.6.21 */ "ui"; var btnTextSize = 20; ui.layout( <vertical h="*" margin="8"> <card layout_weight="1"> <text id="in" gravity="center" textSize="36" textStyle="bold">0</text> </card> <vertical layout_weight="1"> <horizontal layout_weight="1"> <button id="ce" h="*" layout_weight="1" textSize="{{btnTextSize}}">CE</button> <button id="leftparen" h="*" layout_weight="1" textSize="{{btnTextSize}}">(</button> <button id="rightparen" h="*" layout_weight="1" textSize="{{btnTextSize}}">)</button> <button id="div" h="*" layout_weight="1" textSize="{{btnTextSize}}">÷</button> </horizontal> <horizontal layout_weight="1"> <button id="n7" h="*" layout_weight="1" textSize="{{btnTextSize}}">7</button> <button id="n8" h="*" layout_weight="1" textSize="{{btnTextSize}}">8</button> <button id="n9" h="*" layout_weight="1" textSize="{{btnTextSize}}">9</button> <button id="mul" h="*" layout_weight="1" textSize="{{btnTextSize}}">×</button> </horizontal> <horizontal layout_weight="1"> <button id="n4" h="*" layout_weight="1" textSize="{{btnTextSize}}">4</button> <button id="n5" h="*" layout_weight="1" textSize="{{btnTextSize}}">5</button> <button id="n6" h="*" layout_weight="1" textSize="{{btnTextSize}}">6</button> <button id="sub" h="*" layout_weight="1" textSize="{{btnTextSize}}">-</button> </horizontal> <horizontal layout_weight="1"> <button id="n1" h="*" layout_weight="1" textSize="{{btnTextSize}}">1</button> <button id="n2" h="*" layout_weight="1" textSize="{{btnTextSize}}">2</button> <button id="n3" h="*" layout_weight="1" textSize="{{btnTextSize}}">3</button> <button id="plus" h="*" layout_weight="1" textSize="{{btnTextSize}}">+</button> </horizontal> <horizontal layout_weight="1"> <button id="n0" h="*" layout_weight="3" textSize="{{btnTextSize}}">0</button> <button id="eq" h="*" layout_weight="1" textSize="{{btnTextSize}}">=</button> </horizontal> </vertical> </vertical> ); /** * @param {控件} out 输出控件 */ function Calculator(out) { this.out = out; // 输出控件 this.middle = []; // 中缀表达式 /** * 向计算器输入一个数 */ this.input = function (num) { var index = this.middle.length - 1; if (this.middle.length == 0) { this.middle.push(num); } else if (typeof(this.middle[index]) == typeof(1)) { this.middle[index] = this.middle[index] * 10 + num; } else { this.middle.push(num); } this.show(); } /** * 向计算器输入一个符号 */ this.inputSymbol = function (symbol) { switch (symbol) { case "(": this.middle.push(symbol); break; case ")": this.middle.push(symbol); break; case "=": this.cal(); break; case "ce": this.middle = [0]; break; default: var index = this.middle.length - 1; if (this.middle[index] in {"+": 0, "-": 0, "*": 0, "/": 0}) { this.middle[index] = symbol; } else { this.middle.push(symbol); } } this.show(); } /** * 展示输入或输出值 */ this.show = function () { var info = ""; this.middle.forEach(ele => { info += ele; }); log("info:" + info); this.out.text(info); } /** * 计算当前中缀表达式的结果 */ this.cal = function () { // 生成中缀表达式 var n = this.middle.length; var middle = this.middle; // 中缀表达式 log("中缀表达式: " + JSON.stringify(middle)); // 生成后缀表达式 var end = []; var stack = ["#"]; var lv = { "#": 0, "+": 1, "-": 1, "*": 2, "/": 2, "(": 0, }; while (middle.length > 0) { var ele = middle.shift(); if (typeof(ele) == typeof(1)) { end.push(ele); continue; } if (ele == "(") { stack.unshift(ele); continue; } if (ele == ")") { while (stack[0] != "(") { end.push(stack.shift()); } stack.shift(); continue; } if (lv[ele] > lv[stack[0]]) { stack.unshift(ele); continue; } while (lv[ele] <= lv[stack[0]]) { end.push(stack.shift()); } stack.unshift(ele); } while (stack[0] != "#") { end.push(stack.shift()); } log("后缀表达式: " + JSON.stringify(end)); // 计算 var cc = function (num1, num2, operator) { switch (operator) { case "+": return num1 + num2; case "-": return num1 - num2; case "*": return num1 * num2; case "/": return num1 / num2; } } stack = []; end.forEach(ele => { if (typeof(ele) == typeof(1)) { stack.push(ele); } else { var num2 = stack.pop(); var num1 = stack.pop(); stack.push(cc(num1, num2, ele)); } }); if (stack.length != 1) { throw new Error("stack invalid: stack = " + JSON.stringify(stack)); } this.middle = [stack[0]]; } } var cal = new Calculator(ui.in); ui.n0.click(() => { cal.input(0); }); ui.n1.click(() => { cal.input(1); }); ui.n2.click(() => { cal.input(2); }); ui.n3.click(() => { cal.input(3); }); ui.n4.click(() => { cal.input(4); }); ui.n5.click(() => { cal.input(5); }); ui.n6.click(() => { cal.input(6); }); ui.n7.click(() => { cal.input(7); }); ui.n8.click(() => { cal.input(8); }); ui.n9.click(() => { cal.input(9); }); ui.plus.click(() => { cal.inputSymbol("+"); }); ui.sub.click(() => { cal.inputSymbol("-"); }); ui.mul.click(() => { cal.inputSymbol("*"); }); ui.div.click(() => { cal.inputSymbol("/"); }); ui.eq.click(() => { cal.inputSymbol("="); }); ui.leftparen.click(() => { cal.inputSymbol("("); }); ui.rightparen.click(() => { cal.inputSymbol(")"); }); ui.ce.click(() => { cal.inputSymbol("ce"); });