// "Therefore those skilled at the unorthodox

// are infinite as heaven and earth,

// inexhaustible as the great rivers.

// When they come to an end,

// they begin again,

// like the days and months;

// they die and are reborn,

// like the four seasons."

//

// - Sun Tsu,

// "The Art of War"

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Drawing;

using System.IO;

using System.Reflection;

using System.Text;

using System.Threading;

using System.Windows.Forms;

using TheArtOfDev.HtmlRenderer.WinForms;

namespace TheArtOfDev.HtmlRenderer.Demo.WinForms

{

public partial class PerfForm : Form

{

#region Fields and Consts

/// <summary>

/// the html samples to show in the demo

/// </summary>

private readonly Dictionary<string, string> _samples = new Dictionary<string, string>();

/// <summary>

/// the HTML samples to run on

/// </summary>

private static readonly List<string> _perfTestSamples = new List<string>();

private const int Iterations = 3;

#endregion

/// <summary>

/// Init.

/// </summary>

public PerfForm()

{

InitializeComponent();

Icon = DemoForm.GetIcon();

StartPosition = FormStartPosition.CenterScreen;

Size = new Size(1200, 800);

LoadSamples();

}

/// <summary>

/// Used to execute performance test run for memory profiler so the form is not loaded,

/// only html container is working.

/// </summary>

public static void Run(bool layout, bool paint)

{

try

{

LoadRunSamples();

var htmlContainer = new HtmlContainer();

htmlContainer.MaxSize = new SizeF(800, 0);

GC.Collect();

Thread.Sleep(3000);

using (var img = new Bitmap(1, 1))

using (var g = Graphics.FromImage(img))

{

for (int i = 0; i < Iterations; i++)

{

foreach (var html in _perfTestSamples)

{

htmlContainer.SetHtml(html);

if (layout)

htmlContainer.PerformLayout(g);

if (paint)

htmlContainer.PerformPaint(g);

}

}

}

}

catch (Exception ex)

{

MessageBox.Show(ex.ToString(), "Error");

}

}

#region Private methods

/// <summary>

/// Loads the tree of document samples

/// </summary>

private static void LoadRunSamples()

{

var names = Assembly.GetExecutingAssembly().GetManifestResourceNames();

Array.Sort(names);

foreach (string name in names)

{

int extPos = name.LastIndexOf('.');

string ext = name.Substring(extPos >= 0 ? extPos : 0);

if (".htm".IndexOf(ext, StringComparison.Ordinal) >= 0)

{

var resourceStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(name);

if (resourceStream != null)

{

using (var sreader = new StreamReader(resourceStream, Encoding.Default))

{

var html = sreader.ReadToEnd();

_perfTestSamples.Add(html);

}

}

}

}

}

/// <summary>

/// Loads the tree of document samples

/// </summary>

private void LoadSamples()

{

var root = new TreeNode("HTML Renderer");

_samplesTreeView.Nodes.Add(root);

var names = Assembly.GetExecutingAssembly().GetManifestResourceNames();

Array.Sort(names);

foreach (string name in names)

{

int extPos = name.LastIndexOf('.');

int namePos = extPos > 0 && name.Length > 1 ? name.LastIndexOf('.', extPos - 1) : 0;

string ext = name.Substring(extPos >= 0 ? extPos : 0);

string shortName = namePos > 0 && name.Length > 2 ? name.Substring(namePos + 1, name.Length - namePos - ext.Length - 1) : name;

if (".htm".IndexOf(ext, StringComparison.Ordinal) >= 0)

{

if (name.IndexOf("PerfSamples", StringComparison.OrdinalIgnoreCase) > -1)

{

var resourceStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(name);

if (resourceStream != null)

{

using (var sreader = new StreamReader(resourceStream, Encoding.Default))

{

_samples[name] = sreader.ReadToEnd();

}

string nameWithSzie = string.Format("{0} ({1:N0} KB)", shortName, _samples[name].Length * 2 / 1024);

var node = new TreeNode(nameWithSzie);

root.Nodes.Add(node);

node.Tag = name;

}

}

}

}

root.Expand();

}

/// <summary>

/// On tree view node click load the html to the html panel and html editor.

/// </summary>

private void OnSamplesTreeViewAfterSelect(object sender, TreeViewEventArgs e)

{

var name = e.Node.Tag as string;

if (!string.IsNullOrEmpty(name))

{

_htmlPanel.Text = _samples[name];

}

}

/// <summary>

/// Clear the html in the renderer

/// </summary>

private void OnClearLinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

{

_samplesTreeView.SelectedNode = null;

_htmlPanel.Text = null;

GC.Collect();

}

/// <summary>

/// Execute performance test by setting all sample htmls in a loop.

/// </summary>

private void OnRunTestButtonClick(object sender, EventArgs e)

{

if (_samplesTreeView.SelectedNode != null && _samplesTreeView.SelectedNode.Tag != null)

{

_runTestButton.Text = "Running..";

_runTestButton.Enabled = false;

Application.DoEvents();

var iterations = (float)_iterations.Value;

var html = _samples[(string)_samplesTreeView.SelectedNode.Tag];

GC.Collect();

double totalMem = 0;

long startMemory = 0;

if (Environment.Version.Major >= 4)

{

typeof(AppDomain).GetProperty("MonitoringIsEnabled").SetValue(null, true, null);

startMemory = (long)AppDomain.CurrentDomain.GetType().GetProperty("MonitoringTotalAllocatedMemorySize").GetValue(AppDomain.CurrentDomain, null);

}

var sw = Stopwatch.StartNew();

for (int i = 0; i < _iterations.Value; i++)

{

_htmlPanel.Text = html;

Application.DoEvents(); // so paint will be called

}

sw.Stop();

if (Environment.Version.Major >= 4)

{

var endMemory = (long)AppDomain.CurrentDomain.GetType().GetProperty("MonitoringTotalAllocatedMemorySize").GetValue(AppDomain.CurrentDomain, null);

totalMem = (endMemory - startMemory) / 1024f;

}

float htmlSize = html.Length * 2 / 1024f;

var msg = string.Format("1 HTML ({0:N0} KB)\r\n{1} Iterations", htmlSize, _iterations.Value);

msg += "\r\n\r\n";

msg += string.Format("CPU:\r\nTotal: {0} msec\r\nIterationAvg: {1:N2} msec",

sw.ElapsedMilliseconds, sw.ElapsedMilliseconds / iterations);

msg += "\r\n\r\n";

msg += string.Format("Memory:\r\nTotal: {0:N0} KB\r\nIterationAvg: {1:N0} KB\r\nOverhead: {2:N0}%",

totalMem, totalMem / iterations, 100 * (totalMem / iterations) / htmlSize);

Clipboard.SetDataObject(msg);

MessageBox.Show(msg, "Test run results");

_runTestButton.Text = "Run Tests";

_runTestButton.Enabled = true;

}

}

#endregion

}

}