CefSharp.MinimalExample/CefSharp.MinimalExample.Win.../BrowserForm.cs

202 lines
6.6 KiB
C#

// Copyright © 2010-2015 The CefSharp Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
using CefSharp.DevTools.IO;
using CefSharp.MinimalExample.WinForms.Controls;
using CefSharp.WinForms;
using System;
using System.Windows.Forms;
namespace CefSharp.MinimalExample.WinForms
{
public partial class BrowserForm : Form
{
#if DEBUG
private const string Build = "Debug";
#else
private const string Build = "Release";
#endif
private readonly string title = "CefSharp.MinimalExample.WinForms (" + Build + ")";
private readonly ChromiumWebBrowser browser;
public BrowserForm()
{
InitializeComponent();
Text = title;
WindowState = FormWindowState.Maximized;
browser = new ChromiumWebBrowser("www.google.com");
toolStripContainer.ContentPanel.Controls.Add(browser);
browser.IsBrowserInitializedChanged += OnIsBrowserInitializedChanged;
browser.LoadingStateChanged += OnLoadingStateChanged;
browser.ConsoleMessage += OnBrowserConsoleMessage;
browser.StatusMessage += OnBrowserStatusMessage;
browser.TitleChanged += OnBrowserTitleChanged;
browser.AddressChanged += OnBrowserAddressChanged;
browser.LoadError += OnBrowserLoadError;
var version = string.Format("Chromium: {0}, CEF: {1}, CefSharp: {2}",
Cef.ChromiumVersion, Cef.CefVersion, Cef.CefSharpVersion);
#if NETCOREAPP
// .NET Core
var environment = string.Format("Environment: {0}, Runtime: {1}",
System.Runtime.InteropServices.RuntimeInformation.ProcessArchitecture.ToString().ToLowerInvariant(),
System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription);
#else
// .NET Framework
var bitness = Environment.Is64BitProcess ? "x64" : "x86";
var environment = String.Format("Environment: {0}", bitness);
#endif
DisplayOutput(string.Format("{0}, {1}", version, environment));
}
private void OnBrowserLoadError(object sender, LoadErrorEventArgs e)
{
//Actions that trigger a download will raise an aborted error.
//Aborted is generally safe to ignore
if (e.ErrorCode == CefErrorCode.Aborted)
{
return;
}
var errorHtml = string.Format("<html><body><h2>Failed to load URL {0} with error {1} ({2}).</h2></body></html>",
e.FailedUrl, e.ErrorText, e.ErrorCode);
_ = e.Browser.SetMainFrameDocumentContentAsync(errorHtml);
//AddressChanged isn't called for failed Urls so we need to manually update the Url TextBox
this.InvokeOnUiThreadIfRequired(() => urlTextBox.Text = e.FailedUrl);
}
private void OnIsBrowserInitializedChanged(object sender, EventArgs e)
{
var b = ((ChromiumWebBrowser)sender);
this.InvokeOnUiThreadIfRequired(() => b.Focus());
}
private void OnBrowserConsoleMessage(object sender, ConsoleMessageEventArgs args)
{
DisplayOutput(string.Format("Line: {0}, Source: {1}, Message: {2}", args.Line, args.Source, args.Message));
}
private void OnBrowserStatusMessage(object sender, StatusMessageEventArgs args)
{
this.InvokeOnUiThreadIfRequired(() => statusLabel.Text = args.Value);
}
private void OnLoadingStateChanged(object sender, LoadingStateChangedEventArgs args)
{
SetCanGoBack(args.CanGoBack);
SetCanGoForward(args.CanGoForward);
this.InvokeOnUiThreadIfRequired(() => SetIsLoading(!args.CanReload));
}
private void OnBrowserTitleChanged(object sender, TitleChangedEventArgs args)
{
this.InvokeOnUiThreadIfRequired(() => Text = title + " - " + args.Title);
}
private void OnBrowserAddressChanged(object sender, AddressChangedEventArgs args)
{
this.InvokeOnUiThreadIfRequired(() => urlTextBox.Text = args.Address);
}
private void SetCanGoBack(bool canGoBack)
{
this.InvokeOnUiThreadIfRequired(() => backButton.Enabled = canGoBack);
}
private void SetCanGoForward(bool canGoForward)
{
this.InvokeOnUiThreadIfRequired(() => forwardButton.Enabled = canGoForward);
}
private void SetIsLoading(bool isLoading)
{
goButton.Text = isLoading ?
"Stop" :
"Go";
goButton.Image = isLoading ?
Properties.Resources.nav_plain_red :
Properties.Resources.nav_plain_green;
HandleToolStripLayout();
}
public void DisplayOutput(string output)
{
this.InvokeOnUiThreadIfRequired(() => outputLabel.Text = output);
}
private void HandleToolStripLayout(object sender, LayoutEventArgs e)
{
HandleToolStripLayout();
}
private void HandleToolStripLayout()
{
var width = toolStrip1.Width;
foreach (ToolStripItem item in toolStrip1.Items)
{
if (item != urlTextBox)
{
width -= item.Width - item.Margin.Horizontal;
}
}
urlTextBox.Width = Math.Max(0, width - urlTextBox.Margin.Horizontal - 18);
}
private void ExitMenuItemClick(object sender, EventArgs e)
{
browser.Dispose();
Cef.Shutdown();
Close();
}
private void GoButtonClick(object sender, EventArgs e)
{
LoadUrl(urlTextBox.Text);
}
private void BackButtonClick(object sender, EventArgs e)
{
browser.Back();
}
private void ForwardButtonClick(object sender, EventArgs e)
{
browser.Forward();
}
private void UrlTextBoxKeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode != Keys.Enter)
{
return;
}
LoadUrl(urlTextBox.Text);
}
private void LoadUrl(string url)
{
if (Uri.IsWellFormedUriString(url, UriKind.RelativeOrAbsolute))
{
browser.Load(url);
}
}
private void ShowDevToolsMenuItemClick(object sender, EventArgs e)
{
browser.ShowDevTools();
}
}
}