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   源码介绍

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using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

using Be.Windows.Forms;
using System.Collections.Generic;
using System.Text;

namespace Be.HexEditor
{
	/// <summary>
	/// Summary description for FormFind.
	/// </summary>
    public class FormFind : Core.FormEx
	{
		private Be.Windows.Forms.HexBox hexFind;
		private System.Windows.Forms.TextBox txtFind;
		private System.Windows.Forms.RadioButton rbString;
		private System.Windows.Forms.RadioButton rbHex;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Button btnOK;
        private System.Windows.Forms.Button btnCancel;
		private Label lblPercent;
		private Label lblFinding;
		private CheckBox chkMatchCase;
		private Timer timerPercent;
		private Timer timer;
		private FlowLayoutPanel flowLayoutPanel1;
        private FlowLayoutPanel flowLayoutPanel2;
        private Panel line;
		private IContainer components;

		public FormFind()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
			rbString.CheckedChanged  = new EventHandler(rb_CheckedChanged);
			rbHex.CheckedChanged  = new EventHandler(rb_CheckedChanged);

		}

		void ByteProvider_Changed(object sender, EventArgs e)
		{
			ValidateFind();
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
            this.components = new System.ComponentModel.Container();
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(FormFind));
            this.txtFind = new System.Windows.Forms.TextBox();
            this.rbString = new System.Windows.Forms.RadioButton();
            this.rbHex = new System.Windows.Forms.RadioButton();
            this.label1 = new System.Windows.Forms.Label();
            this.btnOK = new System.Windows.Forms.Button();
            this.btnCancel = new System.Windows.Forms.Button();
            this.lblPercent = new System.Windows.Forms.Label();
            this.lblFinding = new System.Windows.Forms.Label();
            this.chkMatchCase = new System.Windows.Forms.CheckBox();
            this.timerPercent = new System.Windows.Forms.Timer(this.components);
            this.timer = new System.Windows.Forms.Timer(this.components);
            this.hexFind = new Be.Windows.Forms.HexBox();
            this.flowLayoutPanel1 = new System.Windows.Forms.FlowLayoutPanel();
            this.line = new System.Windows.Forms.Panel();
            this.flowLayoutPanel2 = new System.Windows.Forms.FlowLayoutPanel();
            this.flowLayoutPanel1.SuspendLayout();
            this.flowLayoutPanel2.SuspendLayout();
            this.SuspendLayout();
            // 
            // txtFind
            // 
            resources.ApplyResources(this.txtFind, "txtFind");
            this.txtFind.Name = "txtFind";
            this.txtFind.TextChanged  = new System.EventHandler(this.txtString_TextChanged);
            // 
            // rbString
            // 
            resources.ApplyResources(this.rbString, "rbString");
            this.rbString.Checked = true;
            this.rbString.Name = "rbString";
            this.rbString.TabStop = true;
            // 
            // rbHex
            // 
            resources.ApplyResources(this.rbHex, "rbHex");
            this.rbHex.Name = "rbHex";
            // 
            // label1
            // 
            resources.ApplyResources(this.label1, "label1");
            this.label1.ForeColor = System.Drawing.Color.Blue;
            this.label1.Name = "label1";
            // 
            // btnOK
            // 
            resources.ApplyResources(this.btnOK, "btnOK");
            this.btnOK.Name = "btnOK";
            this.btnOK.Click  = new System.EventHandler(this.btnOK_Click);
            // 
            // btnCancel
            // 
            resources.ApplyResources(this.btnCancel, "btnCancel");
            this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
            this.btnCancel.Name = "btnCancel";
            this.btnCancel.Click  = new System.EventHandler(this.btnCancel_Click);
            // 
            // lblPercent
            // 
            resources.ApplyResources(this.lblPercent, "lblPercent");
            this.lblPercent.Name = "lblPercent";
            // 
            // lblFinding
            // 
            this.lblFinding.ForeColor = System.Drawing.Color.Blue;
            resources.ApplyResources(this.lblFinding, "lblFinding");
            this.lblFinding.Name = "lblFinding";
            // 
            // chkMatchCase
            // 
            resources.ApplyResources(this.chkMatchCase, "chkMatchCase");
            this.chkMatchCase.Name = "chkMatchCase";
            this.chkMatchCase.UseVisualStyleBackColor = true;
            // 
            // timerPercent
            // 
            this.timerPercent.Tick  = new System.EventHandler(this.timerPercent_Tick);
            // 
            // timer
            // 
            this.timer.Interval = 50;
            this.timer.Tick  = new System.EventHandler(this.timer_Tick);
            // 
            // hexFind
            // 
            resources.ApplyResources(this.hexFind, "hexFind");
            // 
            // 
            // 
            this.hexFind.BuiltInContextMenu.CopyMenuItemImage = global::Be.HexEditor.images.CopyHS;
            this.hexFind.BuiltInContextMenu.CopyMenuItemText = resources.GetString("hexFind.BuiltInContextMenu.CopyMenuItemText");
            this.hexFind.BuiltInContextMenu.CutMenuItemImage = global::Be.HexEditor.images.CutHS;
            this.hexFind.BuiltInContextMenu.CutMenuItemText = resources.GetString("hexFind.BuiltInContextMenu.CutMenuItemText");
            this.hexFind.BuiltInContextMenu.PasteMenuItemImage = global::Be.HexEditor.images.PasteHS;
            this.hexFind.BuiltInContextMenu.PasteMenuItemText = resources.GetString("hexFind.BuiltInContextMenu.PasteMenuItemText");
            this.hexFind.BuiltInContextMenu.SelectAllMenuItemText = resources.GetString("hexFind.BuiltInContextMenu.SelectAllMenuItemText");
            this.hexFind.InfoForeColor = System.Drawing.Color.Empty;
            this.hexFind.Name = "hexFind";
            this.hexFind.ShadowSelectionColor = System.Drawing.Color.FromArgb(((int)(((byte)(100)))), ((int)(((byte)(60)))), ((int)(((byte)(188)))), ((int)(((byte)(255)))));
            // 
            // flowLayoutPanel1
            // 
            this.flowLayoutPanel1.Controls.Add(this.label1);
            this.flowLayoutPanel1.Controls.Add(this.line);
            resources.ApplyResources(this.flowLayoutPanel1, "flowLayoutPanel1");
            this.flowLayoutPanel1.Name = "flowLayoutPanel1";
            this.flowLayoutPanel1.Paint  = new System.Windows.Forms.PaintEventHandler(this.flowLayoutPanel1_Paint);
            // 
            // line
            // 
            resources.ApplyResources(this.line, "line");
            this.line.BackColor = System.Drawing.Color.LightGray;
            this.line.Name = "line";
            // 
            // flowLayoutPanel2
            // 
            resources.ApplyResources(this.flowLayoutPanel2, "flowLayoutPanel2");
            this.flowLayoutPanel2.Controls.Add(this.btnCancel);
            this.flowLayoutPanel2.Controls.Add(this.btnOK);
            this.flowLayoutPanel2.Controls.Add(this.lblFinding);
            this.flowLayoutPanel2.Controls.Add(this.lblPercent);
            this.flowLayoutPanel2.Name = "flowLayoutPanel2";
            // 
            // FormFind
            // 
            this.AcceptButton = this.btnOK;
            resources.ApplyResources(this, "$this");
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;
            this.BackColor = System.Drawing.SystemColors.Control;
            this.CancelButton = this.btnCancel;
            this.Controls.Add(this.flowLayoutPanel2);
            this.Controls.Add(this.flowLayoutPanel1);
            this.Controls.Add(this.chkMatchCase);
            this.Controls.Add(this.rbHex);
            this.Controls.Add(this.rbString);
            this.Controls.Add(this.txtFind);
            this.Controls.Add(this.hexFind);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.Name = "FormFind";
            this.ShowIcon = false;
            this.ShowInTaskbar = false;
            this.Activated  = new System.EventHandler(this.FormFind_Activated);
            this.flowLayoutPanel1.ResumeLayout(false);
            this.flowLayoutPanel1.PerformLayout();
            this.flowLayoutPanel2.ResumeLayout(false);
            this.flowLayoutPanel2.PerformLayout();
            this.ResumeLayout(false);
            this.PerformLayout();

		}
		#endregion

		private FindOptions _findOptions;

		public FindOptions FindOptions
		{
			get 
			{ 
				return _findOptions; 
			}
			set
			{
				_findOptions = value;
				Reinitialize();
			}
		}

		public HexBox HexBox { get; set; }

		private void Reinitialize()
		{
			rbString.Checked = _findOptions.Type == FindType.Text;
			txtFind.Text = _findOptions.Text;
			chkMatchCase.Checked = _findOptions.MatchCase;

			rbHex.Checked = _findOptions.Type == FindType.Hex;

			if (hexFind.ByteProvider != null)
				hexFind.ByteProvider.Changed -= new EventHandler(ByteProvider_Changed);

			var hex = this._findOptions.Hex != null ? _findOptions.Hex : new byte[0];
			hexFind.ByteProvider = new DynamicByteProvider(hex);
			hexFind.ByteProvider.Changed  = new EventHandler(ByteProvider_Changed);
		}

		private void rb_CheckedChanged(object sender, System.EventArgs e)
		{
			txtFind.Enabled = rbString.Checked;
			hexFind.Enabled = !txtFind.Enabled;

			if(txtFind.Enabled)
				txtFind.Focus();
			else
				hexFind.Focus();
		}

		private void rbString_Enter(object sender, EventArgs e)
		{
			txtFind.Focus();
		}

		private void rbHex_Enter(object sender, EventArgs e)
		{
			hexFind.Focus();
		}

		private void FormFind_Activated(object sender, System.EventArgs e)
		{
			if(rbString.Checked)
				txtFind.Focus();
			else
				hexFind.Focus();
		}

		private void btnOK_Click(object sender, System.EventArgs e)
		{
			_findOptions.MatchCase = chkMatchCase.Checked;

			var provider = this.hexFind.ByteProvider as DynamicByteProvider;
			_findOptions.Hex = provider.Bytes.ToArray();
			_findOptions.Text = txtFind.Text;
			_findOptions.Type = rbHex.Checked ? FindType.Hex : FindType.Text;
			_findOptions.MatchCase = chkMatchCase.Checked;
			_findOptions.IsValid = true;

			FindNext();
		}

		bool _finding;

		public void FindNext()
		{
			if (!_findOptions.IsValid)
				return;

			UpdateUIToFindingState();

			// start find process
			long res = HexBox.Find(_findOptions);

			UpdateUIToNormalState();

			Application.DoEvents();

			if (res == -1) // -1 = no match
			{
				MessageBox.Show(strings.FindOperationEndOfFile, Program.SoftwareName,
					MessageBoxButtons.OK, MessageBoxIcon.Information);
			}
			else if (res == -2) // -2 = find was aborted
			{
				return;
			}
			else // something was found
			{
				this.Close();

				Application.DoEvents();

				if (!HexBox.Focused)
					HexBox.Focus();
			}
		}

		private void UpdateUIToNormalState()
		{
			timer.Stop();
			timerPercent.Stop();
			_finding = false;
			txtFind.Enabled = chkMatchCase.Enabled = rbHex.Enabled = rbString.Enabled
				= hexFind.Enabled = btnOK.Enabled = true;
		}

		private void UpdateUIToFindingState()
		{
			_finding = true;
			timer.Start();
			timerPercent.Start();
			txtFind.Enabled = chkMatchCase.Enabled = rbHex.Enabled = rbString.Enabled
				= hexFind.Enabled = btnOK.Enabled = false;
		}

		private void btnCancel_Click(object sender, System.EventArgs e)
		{
			if (_finding)
				this.HexBox.AbortFind();
			else
				this.Close();
		}

		private void txtString_TextChanged(object sender, EventArgs e)
		{
			ValidateFind();
		}

		private void ValidateFind()
		{
			var isValid = false;
			if (rbString.Checked && txtFind.Text.Length > 0)
				isValid = true;
			if (rbHex.Checked && hexFind.ByteProvider.Length > 0)
				isValid = true;
			this.btnOK.Enabled = isValid;
		}

		private void timer_Tick(object sender, EventArgs e)
		{
			if (lblFinding.Text.Length == 13)
				lblFinding.Text = "";

			lblFinding.Text  = ".";
		}

		private void timerPercent_Tick(object sender, EventArgs e)
		{
			long pos = this.HexBox.CurrentFindingPosition;
			long length = HexBox.ByteProvider.Length;
			double percent = (double)pos / (double)length * (double)100;

			System.Globalization.NumberFormatInfo nfi =
				new System.Globalization.CultureInfo("en-US").NumberFormat;

			string text = percent.ToString("0.00", nfi)   " %";
			lblPercent.Text = text;
		}

        private void flowLayoutPanel1_Paint(object sender, PaintEventArgs e)
        {

        }

	}
}