78 lines
2.2 KiB
C#
78 lines
2.2 KiB
C#
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using Mono.WebAssembly;
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using System;
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class Hello
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{
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static int Factorial(int n)
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{
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if (n == 0) {
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return 1;
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}
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return n * Factorial(n - 1);
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}
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// This function is called from the browser by JavaScript.
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// Here we calculate the factorial of the given number then use the
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// Mono.WebAssembly API to retrieve the element from the DOM and set its
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// innerText property to the factorial result.
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static void FactorialInElement(int n, string element_id)
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{
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Console.WriteLine(
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"Calculating factorial of {0} into DOM element {1}",
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n, element_id);
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int f = Factorial(n);
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var elem = HtmlPage.Document.GetElementById(element_id);
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elem.InnerText = f.ToString();
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}
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static void PrintHtmlElements(HtmlElement elem, int level)
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{
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string str = "";
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for (int i = 0; i < level; i++) {
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str += " ";
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}
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str += $"<{elem.TagName}";
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foreach (var name in elem.AttributeNames) {
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var value = elem.GetAttribute(name);
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str += $" {name}='{value}'";
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}
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str += ">";
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Console.WriteLine(str);
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var list = elem.Children;
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for (int i = 0; i < list.Count; i++) {
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var child = list[i];
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PrintHtmlElements(child, level + 1);
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}
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}
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static int Main(string[] args)
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{
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Ooui.Div odiv = new Ooui.Div ();
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int f = Factorial(6);
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HtmlPage.Window.Alert($"Hello world! factorial(6) -> {odiv}");
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var bi = HtmlPage.BrowserInformation;
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Console.WriteLine($"BrowserInformation: Name {bi.Name} BrowserVersion {bi.BrowserVersion} UserAgent {bi.UserAgent} Platform {bi.Platform} CookiesEnabled {bi.CookiesEnabled} ProductName {bi.ProductName}");
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var d = HtmlPage.Document;
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Console.WriteLine($"Document Location: {d.Location}");
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PrintHtmlElements(d.DocumentElement, 0);
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var p = d.CreateElement("p");
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p.InnerText = "This text was added at runtime.";
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d.Body.AppendChild(p);
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if (args.Length > 0) FactorialInElement(0, ""); // this is a hack so that the linker does not remove the FactorialInElement() method
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return f;
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}
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}
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