100 lines
3.0 KiB
C#
100 lines
3.0 KiB
C#
using Sarand.Net.Standard.Base.App;
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using Sarand.Net.Standard.Base.Core;
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using Sarand.Net.Standard.Base.Utils;
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using System;
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using System.Collections.Generic;
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using System.Text;
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using Xamarin.Forms;
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namespace Sarand.Net.Mobile.Xamarin.Forms.Controls
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{
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//=======================================================================
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public class SaxWebView : WebView
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{
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//-------------------------------------------------------------------
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// Definitions.
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//-------------------------------------------------------------------
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// Data members.
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public String html = "";
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private HtmlWebViewSource htmlSource;
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private UrlWebViewSource aboutBlankSource = new UrlWebViewSource() { Url = "about:blank" };
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// Managers.
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//-------------------------------------------------------------------
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// Construction.
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public SaxWebView ()
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{
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// Events.
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Navigating += WebView_Navigating;
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Navigated += WebView_Navigated;
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// HTML source.
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htmlSource = new HtmlWebViewSource() { Html = html };
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Source = aboutBlankSource;
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}
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//-------------------------------------------------------------------
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// Properties.
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// HTML Panel.
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public static String AppActionPrefix => "App:";
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public String Html
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{
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get { return html; }
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set
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{
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Source = aboutBlankSource;
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htmlSource.Html = null;
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html = value;
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htmlSource.Html = html;
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Source = htmlSource;
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}
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}
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//-------------------------------------------------------------------
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// N a v i g a t i o n
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//-------------------------------------------------------------------
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public class AppNavigatingEventArgs : EventArgs
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{
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public String AppAction { get; set; }
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}
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public delegate void AppNavigatingEventHandler (object sender, AppNavigatingEventArgs e);
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public event AppNavigatingEventHandler AppNavigating;
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private void OnAppNavigating (String appAction)
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{
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if (AppNavigating != null) AppNavigating.Invoke(this, new AppNavigatingEventArgs() { AppAction = appAction });
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}
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private String GetAppAction (String location)
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{
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if (!location.StartsWithCI(AppActionPrefix)) return "";
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return location.Right(location.Length - AppActionPrefix.Length);
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}
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//-------------------------------------------------------------------
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// C o n t r o l E v e n t s
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//-------------------------------------------------------------------
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private void WebView_Navigating (object sender, WebNavigatingEventArgs e)
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{
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String appAction = GetAppAction(e.Url);
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SaLogger.Debug("SaxWebView_Navigating URL: "+e.Url+". App action: "+ appAction);
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if (!StringUtil.IsEmpty(appAction))
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{
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e.Cancel = true;
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OnAppNavigating(appAction);
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}
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}
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private void WebView_Navigated (object sender, WebNavigatedEventArgs e)
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{
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SaLogger.Debug("SaxWebView_Navigated URL: " + e.Url);
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String appAction = GetAppAction(e.Url);
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if (!StringUtil.IsEmpty(appAction))
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{
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Source = htmlSource;
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}
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}
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//-------------------------------------------------------------------
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}
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//=======================================================================
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}
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