Update: Plugin Web Helpers

Web Helpers included in UI Extensions and WebHandlers
2013-10-22 13:48:25 +11:00
parent cc218a08e4
commit 0d60fb422c
7 changed files with 166 additions and 130 deletions
@@ -0,0 +1,111 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Web;
+using System.Web.Mvc;
+using System.Web.Mvc.Html;
+using System.Web.WebPages;
+
+namespace Disco.Services.Plugins
+{
+    public class WebPageHelper<T> : WebHelper
+    {
+        protected WebViewPage<T> ViewPage { get; set; }
+
+        public WebPageHelper(WebViewPage<T> ViewPage, PluginManifest Manifest)
+            : base(ViewPage.Context, Manifest)
+        {
+            this.ViewPage = ViewPage;
+        }
+
+        #region Html Helpers
+
+        #region Form Helpers
+        public MvcForm BeginForm(string Action, FormMethod Method, bool MultipartEncoding, IDictionary<string, object> HtmlAttributes)
+        {
+            if (string.IsNullOrEmpty(Action))
+                throw new ArgumentNullException("PluginAction");
+
+            var url = ActionUrl(Action);
+
+            return BeginForm_Helper(url.ToString(), Method, MultipartEncoding, HtmlAttributes);
+        }
+        public MvcForm BeginForm(string Action, FormMethod Method, bool MultipartEncoding)
+        {
+            return BeginForm(Action, Method, MultipartEncoding, null);
+        }
+        public MvcForm BeginForm(string Action, FormMethod Method, IDictionary<string, object> HtmlAttributes)
+        {
+            return BeginForm(Action, Method, false, HtmlAttributes);
+        }
+        public MvcForm BeginForm(string Action, FormMethod Method)
+        {
+            return BeginForm(Action, Method, false, null);
+        }
+        public MvcForm BeginForm(string Action)
+        {
+            return BeginForm(Action, FormMethod.Get, false, null);
+        }
+        private MvcForm BeginForm_Helper(string FormAction, FormMethod Method, bool MultipartEncoding, IDictionary<string, object> HtmlAttributes)
+        {
+            TagBuilder builder = new TagBuilder("form");
+            builder.MergeAttributes(HtmlAttributes);
+            if (MultipartEncoding)
+                builder.MergeAttribute("enctype", "multipart/form-data");
+            builder.MergeAttribute("action", FormAction);
+            builder.MergeAttribute("method", HtmlHelper.GetFormMethodString(Method), true);
+
+            bool useClientValidation = ViewPage.ViewContext.ClientValidationEnabled && !ViewPage.ViewContext.UnobtrusiveJavaScriptEnabled;
+            if (useClientValidation)
+            {
+                object lastFormNumber = ViewPage.ViewContext.HttpContext.Items["DiscoPluginLastFormNum"];
+                int num = (lastFormNumber != null) ? (((int)lastFormNumber) + 1) : 1000;
+                ViewPage.ViewContext.HttpContext.Items["DiscoPluginLastFormNum"] = num;
+
+                builder.GenerateId(string.Format(CultureInfo.InvariantCulture, "form{0}", new object[] { num }));
+            }
+            ViewPage.ViewContext.Writer.Write(builder.ToString(TagRenderMode.StartTag));
+            MvcForm form = new MvcForm(ViewPage.ViewContext);
+            if (useClientValidation)
+            {
+                ViewPage.ViewContext.FormContext.FormId = builder.Attributes["id"];
+            }
+            return form;
+        }
+        #endregion
+
+        public HtmlString PartialCompiled<ViewType>(object Model) where ViewType : WebViewPage
+        {
+            using (System.IO.StringWriter writer = new StringWriter(CultureInfo.CurrentCulture))
+            {
+                RenderPartialCompiled<ViewType>(writer, Model);
+
+                return new HtmlString(writer.ToString());
+            }
+        }
+        public HtmlString PartialCompiled<ViewType>() where ViewType : WebViewPage
+        {
+            return PartialCompiled<ViewType>(null);
+        }
+        private void RenderPartialCompiled<ViewType>(TextWriter Writer, object Model)
+        {
+            if (Writer == null)
+                throw new ArgumentNullException("Writer");
+            WebViewPage page = Activator.CreateInstance(typeof(ViewType)) as WebViewPage;
+            if (page == null)
+                throw new InvalidOperationException("Invalid View Type");
+            page.ViewContext = ViewPage.ViewContext;
+            page.ViewData = new ViewDataDictionary(Model);
+            page.InitHelpers();
+            HttpContextBase httpContext = ViewPage.ViewContext.HttpContext;
+            page.ExecutePageHierarchy(new WebPageContext(httpContext, null, Model), Writer, null);
+        }
+
+        #endregion
+
+    }
+}