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using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Drawing;

using System.ComponentModel;

namespace ST.Library.UI.STTextBox

{

public partial class STTextBox : Control

{

[Browsable(false)]

public float XDPIZoom { get; private set; }

[Browsable(false)]

public float YDPIZoom { get; private set; }

private int _BorderWidth = 1;

public int BorderWidth {

get { return _BorderWidth; }

set { _BorderWidth = value; }

}

private int _LineSpacing = 0;

public int LineSpacing {

get { return _LineSpacing; }

set {

if (value < 0) {

throw new ArgumentException("The value must be more than zero");

}

_LineSpacing = value;

this.Invalidate();

}

private int _CharSpacing = 0;

public int CharSpacing {

get { return _CharSpacing; }

set {

if (value < 0) {

throw new ArgumentException("The value must be more than zero");

}

_CharSpacing = value;

this.Invalidate();

}

private Color _BorderColor = Color.FromArgb(125, 0, 0, 0);

public Color BorderColor {

get { return _BorderColor; }

set {

if (_BorderColor == value) {

return;

}

_BorderColor = value;

this.Invalidate();

}

private Color _SelectionColor = Color.FromArgb(0, 120, 215);

public Color SelectionColor {

get { return _SelectionColor; }

set {

if (value == _SelectionColor) {

return;

}

_SelectionColor = value;

if (!m_core.Selection.IsEmptySelection) {

this.Invalidate();

}

private Color _SelectedTextColor = Color.White;

public Color SelectedTextColor {

get { return _SelectedTextColor; }

set {

if (value == _SelectedTextColor) {

return;

}

_SelectedTextColor = value;

if (!m_core.Selection.IsEmptySelection) {

this.Invalidate();

}

private bool _AllowScrollBar = true;

public bool AllowScrollBar {

get { return _AllowScrollBar; }

set { _AllowScrollBar = value; }

}

[Browsable(true)]

[Category("Behavior")]

[DefaultValue(false)]

[Description("Gets or sets whether text wraps to the next line.")]

public bool WordWrap {

get {

return m_core != null && m_core.ITextView is WrapTextView;

}

set {

if (m_core == null || value == (m_core.ITextView is WrapTextView)) return;

if (value) {

this.SetTextView(new WrapTextView(WrapTextView.Method.Word, WrapTextView.Alignment.Left));

} else {

this.SetTextView(new QuickTextView());

}

[Browsable(true)]

[Category("Appearance")]

[DefaultValue(WrapTextView.Alignment.Left)]

[Description("Gets or sets text alignment when wrapped view is used.")]

public WrapTextView.Alignment TextAlignment {

get {

var wrap = (m_core != null) ? m_core.ITextView as WrapTextView : null;

return wrap != null ? wrap.WrapAlignment : WrapTextView.Alignment.Left;

}

set {

var wrap = (m_core != null) ? m_core.ITextView as WrapTextView : null;

if (wrap != null) {

wrap.SetWrap(wrap.WrapMethod, value);

this.Invalidate();

}

private Color _ScrollbarBackColor = Color.FromArgb(40, Color.Gray);

public Color ScrollbarBackColor {

get { return _ScrollbarBackColor; }

set { _ScrollbarBackColor = value; }

}

private Color _ScrollBarCornerColor = Color.FromArgb(80, Color.Gray);

public Color ScrollBarCornerColor {

get { return _ScrollBarCornerColor; }

set { _ScrollBarCornerColor = value; }

}

private Color _ScrollbarThumbHoverColor = Color.FromArgb(80, Color.Gray);

public Color ScrollbarThumbHoverColor {

get { return _ScrollbarThumbHoverColor; }

set { _ScrollbarThumbHoverColor = value; }

}

private Color _ScrollbarThumbBackColor = Color.FromArgb(80, Color.Black);

public Color ScrollbarThumbBackColor {

get { return _ScrollbarThumbBackColor; }

set { _ScrollbarThumbBackColor = value; }

}

private int _TabSize = 4;

private bool _AutoIndent = true;

private bool _TabToSpace = false;

private const int WM_MOUSEHWHEEL = 0x020E;

private object m_obj_sync = new object();

private Timer m_timer;

private IntPtr m_hIMC;

protected Core m_core;

public STTextBox() {

this.SetStyle(ControlStyles.UserPaint, true);

this.SetStyle(ControlStyles.ResizeRedraw, true);

this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);

this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);

this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);

this.BackColor = Color.White;

m_timer = new Timer();

m_timer.Interval = 1000;

m_timer.Tick += new EventHandler(m_timer_Tick);

m_core = new Core(this);

}

#region override

protected override void OnCreateControl() {

base.OnCreateControl();

using (Graphics g = this.CreateGraphics()) {

this.XDPIZoom = g.DpiX / 96;

this.YDPIZoom = g.DpiY / 96;

}

protected override void WndProc(ref Message m) {

switch (m.Msg) {

case Win32.WM_IME_STARTCOMPOSITION:

m_hIMC = Win32.ImmGetContext(this.Handle);

this.OnImeStartPrivate(m_hIMC);

break;

case Win32.WM_IME_ENDCOMPOSITION:

this.OnImeEndPrivate(m_hIMC);

break;

case Win32.WM_IME_COMPOSITION:

if (((int)m.LParam & Win32.GCS_RESULTSTR) == Win32.GCS_RESULTSTR) {

m.Result = (IntPtr)1;

this.OnImeResultStrPrivate(m_hIMC, Win32.ImmGetCompositionString(m_hIMC, Win32.GCS_RESULTSTR));

return;//Interrupt, WM_CHAR, WM_IME_CHAR messages will not be generated.

}

if (((int)m.LParam & Win32.GCS_COMPSTR) == Win32.GCS_COMPSTR) {

this.OnImeCompStr(m_hIMC, Win32.ImmGetCompositionString(m_hIMC, Win32.GCS_COMPSTR));

}

break;

case WM_MOUSEHWHEEL:

Point pt = new Point(((int)m.LParam) >> 16, (ushort)m.LParam);

pt = this.PointToClient(pt);

MouseButtons mb = MouseButtons.None;

int n = (ushort)m.WParam;

if ((n & 0x0001) == 0x0001) mb |= MouseButtons.Left;

if ((n & 0x0010) == 0x0010) mb |= MouseButtons.Middle;

if ((n & 0x0002) == 0x0002) mb |= MouseButtons.Right;

if ((n & 0x0020) == 0x0020) mb |= MouseButtons.XButton1;

if ((n & 0x0040) == 0x0040) mb |= MouseButtons.XButton2;

this.OnMouseHWheel(new MouseEventArgs(mb, 0, pt.X, pt.Y, ((int)m.WParam) >> 16));

break;

}

base.WndProc(ref m);

}

protected override void OnPaint(PaintEventArgs e) {

base.OnPaint(e);

//System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();

//sw.Start();

this.XDPIZoom = e.Graphics.DpiX / 96;

this.YDPIZoom = e.Graphics.DpiY / 96;

var render = m_core.ITextBoxRender;

//try {

render.OnBeginPaint(e.Graphics);

m_core.ITextView.OnDrawView(render);

if (this._AllowScrollBar && m_core.Scroll.CountDown != 0) {

this.OnCalcScrollRectangle(m_core.Scroll);

bool bFlag = true;

if (m_core.Scroll.HBackRect != m_core.Scroll.HThumbRect) {

this.OnDrawHScrollBar(render, m_core.Scroll);

} else { bFlag = false; }

if (m_core.Scroll.VBackRect != m_core.Scroll.VThumbRect) {

this.OnDrawVScrollBar(render, m_core.Scroll);

} else { bFlag = false; }

if (bFlag) this.OnDrawScrollBarCorner(render, m_core.Scroll);

}

this.OnDrawBorder(render);

render.OnEndPaint(e.Graphics);

//} catch (Exception ex) {

// MessageBox.Show(ex.Message + "\r\n\r\n" + ex.StackTrace);

//}

//sw.Stop();

//Console.WriteLine("OnPaint - " + sw.ElapsedMilliseconds + "ms");

}

protected virtual void OnDrawBorder(ISTTextBoxRender render) {

if (this._BorderWidth <= 0) {

return;

}

int nWidth = this.GetIntXSize(this._BorderWidth);

int nHeight = this.GetIntYSize(this._BorderWidth);

if (nWidth == 0) nWidth = 1;

if (nHeight == 0) nHeight = 1;

render.FillRectangle(this._BorderColor, 0, 0, nWidth, this.Height);

render.FillRectangle(this._BorderColor, this.Width - nWidth, 0, nWidth, this.Height);

render.FillRectangle(this._BorderColor, nWidth, 0, this.Width - nWidth * 2, nHeight);

render.FillRectangle(this._BorderColor, nWidth, this.Height - nHeight, this.Width - nWidth * 2, nHeight);

}

protected override void OnResize(EventArgs e) {

base.OnResize(e);

int nX = this.GetIntXSize(this._BorderWidth);

int nY = this.GetIntYSize(this._BorderWidth);

var rect = new Rectangle(nX, nY, this.Width - nX * 2, this.Height - nY * 2);

if (rect.Height < 1 || rect.Width < 1 || rect == m_core.ViewRectangle) {

return;

}

m_core.ViewRectangle = rect;

m_core.ITextView.OnCalcTextRectangle();

m_core.ITextView.OnResize(e);

m_core.ITextView.OnCalcScroll(m_core.Scroll);

}

protected override void OnFontChanged(EventArgs e) {

base.OnFontChanged(e);

if (m_core != null && m_core.ITextView != null) {

m_core.ITextView.Init(m_core);

m_core.ITextView.OnCalcTextRectangle();

if (m_core.Scroll != null) {

m_core.ITextView.OnCalcScroll(m_core.Scroll);

}

this.Invalidate();

}

protected override void OnGotFocus(EventArgs e) {

base.OnGotFocus(e);

Win32.CreateCaret(this.Handle, IntPtr.Zero, this.GetIntXSize(1), m_core.LineHeight);

Win32.ShowCaret(this.Handle);

}

protected override void OnLostFocus(EventArgs e) {

base.OnLostFocus(e);

Win32.HideCaret(this.Handle);

Win32.DestroyCaret();

}

#endregion

#region public

public float GetFloatXSize(int nSize) { return nSize * this.XDPIZoom; }

public float GetFloatXSize(float fSize) { return fSize * this.XDPIZoom; }

public int GetIntXSize(int nSize) { return (int)Math.Round(nSize * this.XDPIZoom); }

public int GetIntXSize(float fSize) { return (int)Math.Round(fSize * this.XDPIZoom); }

public float GetFloatYSize(int nSize) { return nSize * this.YDPIZoom; }

public float GetFloatYSize(float fSize) { return fSize * this.YDPIZoom; }

public int GetIntYSize(int nSize) { return (int)Math.Round(nSize * this.YDPIZoom); }

public int GetIntYSize(float fSize) { return (int)Math.Round(fSize * this.YDPIZoom); }

public void ShowScrollBar(int nSecond) {

lock (m_obj_sync) {

m_core.Scroll.CountDown = nSecond;

}

m_timer.Start();

}

public TextHistoryRecord SetText(string strText) {

return m_core.TextManager.SetText(strText);

}

public TextHistoryRecord SetText(int nIndex, string strText) {

return m_core.TextManager.SetText(nIndex, strText);

}

public TextHistoryRecord SetText(int nIndex, int nLen, string strText) {

return m_core.TextManager.SetText(nIndex, nLen, strText);

}

public void Select(int nStart, int nLength) {

if (nStart < 0) nStart = 0;

if (nLength < 0) nLength = 0;

int nMax = m_core.TextManager.TextLength;

if (nStart > nMax) nStart = nMax;

if (nStart + nLength > nMax) nLength = nMax - nStart;

m_core.Selection.SetSelection(nStart, nStart + nLength);

m_core.Caret.IndexOfChar = m_core.Selection.EndIndex;

m_core.ITextView.SetCaretPostion(m_core.Caret.IndexOfChar);

this.Invalidate();

}

public void SelectAll() {

m_core.Selection.SetSelection(0, m_core.TextManager.TextLength);

m_core.Caret.IndexOfChar = m_core.Selection.EndIndex;

m_core.ITextView.SetCaretPostion(m_core.Caret.IndexOfChar);

this.Invalidate();

}

public void Copy() {

this.Copy(false);

}

public void Cut() {

this.Copy(true);

}

private void Copy(bool bCut) {

var c = m_core;

if (c.Selection.IsEmptySelection) {

return;

}

Clipboard.SetText(c.TextManager.GetText(c.Selection.StartIndex, c.Selection.Length));

if (bCut) {

this.EnterText("");

}

public void Paste() {

string strText = Clipboard.GetText();

if (string.IsNullOrEmpty(strText)) {

return;

}

this.EnterText(strText);

}

public void Undo() {

this.RunHistory(true);

}

public void Redo() {

this.RunHistory(false);

}

private void RunHistory(bool isUndo) {

var c = m_core;

if (c.ITextHistory == null) {

return;

}

var histories = isUndo ? c.ITextHistory.GetUndo() : c.ITextHistory.GetRedo();

if (histories == null || histories.Length == 0) {

return;

}

if (isUndo) {

var temp = new TextHistoryRecord[histories.Length];

for (int i = 0; i < histories.Length; i++) {

temp[i] = histories[i];

temp[i].NewText = histories[i].OldText;

temp[i].OldText = histories[i].NewText;

}

histories = temp;

}

histories = c.TextManager.RunHistory(histories);

var last = histories[histories.Length - 1];

c.Selection.SetSelection(last.Index, last.Index + last.NewText.Length);

c.Caret.IndexOfChar = m_core.Selection.EndIndex;

c.ITextView.SetCaretPostion(c.Caret.IndexOfChar);

c.ITextView.ScrollToCaret();

this.Invalidate();

}

#endregion

#region protected

protected virtual void OnImeStart(IntPtr hIMC) { }

protected virtual void OnImeResultStr(IntPtr hIMC, string strResult) { this.EnterText(strResult); }

protected virtual void OnImeCompStr(IntPtr hIMC, string strComp) { }

protected virtual void OnImeEnd(IntPtr hIMC) { }

protected virtual void OnCalcScrollRectangle(STTextBoxScrollInfo scroll) {

int nSW = this.GetIntXSize(scroll.Size);

int nSH = this.GetIntYSize(scroll.Size);

var c = m_core;

Rectangle rectV = c.ViewRectangle;

scroll.HBackRect = new Rectangle(rectV.X, rectV.Bottom - nSH, rectV.Width - nSW, nSH);

scroll.VBackRect = new Rectangle(rectV.Right - nSW, rectV.Y, nSW, rectV.Height - nSH);

Rectangle rect_h_thumb = scroll.HBackRect;

Rectangle rect_v_thumb = scroll.VBackRect;

float fScale = ((float)rectV.Width / scroll.XIncrement) / (rectV.Width / scroll.XIncrement + scroll.MaxXValue);

rect_h_thumb.Width = (int)(rectV.Width * fScale);

if (rect_h_thumb.Width > scroll.HBackRect.Width) {

rect_h_thumb.Width = scroll.HBackRect.Width;

} else if (rect_h_thumb.Width < this.GetIntXSize(4)) {

rect_h_thumb.Width = this.GetIntXSize(4);

}

fScale = ((float)rectV.Height / c.LineHeight) / (rectV.Height / c.LineHeight + scroll.MaxYValue);

rect_v_thumb.Height = (int)(rectV.Height * fScale);

if (rect_v_thumb.Height > scroll.VBackRect.Height) {

rect_v_thumb.Height = scroll.VBackRect.Height;

} else if (rect_v_thumb.Height < this.GetIntYSize(4)) {

rect_v_thumb.Height = this.GetIntYSize(4);

}

rect_h_thumb.X = rectV.X;

if (scroll.MaxXValue > 0) {

fScale = (float)scroll.XValue / scroll.MaxXValue;

rect_h_thumb.X += (int)((scroll.HBackRect.Width - rect_h_thumb.Width) * fScale);

}

rect_v_thumb.Y = rectV.Y;

if (scroll.MaxYValue > 0) {

fScale = (float)scroll.YValue / scroll.MaxYValue;

rect_v_thumb.Y += (int)((scroll.VBackRect.Height - rect_v_thumb.Height) * fScale);

}

scroll.HThumbRect = rect_h_thumb;

scroll.VThumbRect = rect_v_thumb;

if (scroll.VBackRect == rect_v_thumb) {

rect_h_thumb.Width += nSW;

scroll.HThumbRect = rect_h_thumb;

var temp = scroll.HBackRect;

temp.Width += nSW;

scroll.HBackRect = temp;

} else if (scroll.HBackRect == rect_h_thumb) {

rect_v_thumb.Height += nSH;

scroll.VThumbRect = rect_v_thumb;

var temp = scroll.VBackRect;

temp.Height += nSH;

scroll.VBackRect = temp;

} else {

}

//scroll.HThumbRect = rect_h_thumb;

//scroll.VThumbRect = rect_v_thumb;

}

protected virtual void OnDrawVScrollBar(ISTTextBoxRender render, STTextBoxScrollInfo scroll) {

var clr = scroll.HoverScrollBar == STTextBoxScrollInfo.ScrollBarType.V ? this._ScrollbarThumbHoverColor : this._ScrollbarBackColor;

render.FillRectangle(clr, scroll.VBackRect);

render.FillRectangle(clr, scroll.VBackRect.X, scroll.VBackRect.Y, this.GetIntXSize(1), scroll.VBackRect.Height);

render.FillRectangle(this._ScrollbarThumbBackColor, scroll.VThumbRect);

}

protected virtual void OnDrawHScrollBar(ISTTextBoxRender render, STTextBoxScrollInfo scroll) {

var clr = scroll.HoverScrollBar == STTextBoxScrollInfo.ScrollBarType.H ? this._ScrollbarThumbHoverColor : this._ScrollbarBackColor;

render.FillRectangle(clr, scroll.HBackRect);

render.FillRectangle(clr, scroll.HBackRect.X, scroll.HBackRect.Y, scroll.HBackRect.Width, this.GetIntYSize(1));

render.FillRectangle(this._ScrollbarThumbBackColor, scroll.HThumbRect);

}

protected virtual void OnDrawScrollBarCorner(ISTTextBoxRender render, STTextBoxScrollInfo scroll) {

int nWidth = this.GetIntXSize(scroll.Size);

int nHeight = this.GetIntYSize(scroll.Size);

render.FillRectangle(

this._ScrollBarCornerColor, m_core.ViewRectangle.Right - nWidth,

m_core.ViewRectangle.Bottom - nHeight,

nWidth,

nHeight);

}

#endregion

#region private

private bool SetCursor(Cursor c) {

if (this.Cursor == c) {

return false;

}

this.Cursor = c;

return true;

}

private void OnImeStartPrivate(IntPtr hIMC) {

var CandidateForm = new Win32.CANDIDATEFORM() {

dwStyle = Win32.CFS_CANDIDATEPOS,

ptCurrentPos = m_core.Caret.Location

};

Win32.ImmSetCandidateWindow(hIMC, ref CandidateForm);

var CompositionForm = new Win32.COMPOSITIONFORM() {

dwStyle = Win32.CFS_FORCE_POSITION,

ptCurrentPos = m_core.Caret.Location

};

Win32.ImmSetCompositionWindow(hIMC, ref CompositionForm);

var logFont = new Win32.LOGFONT() {

lfHeight = m_core.FontHeight,

lfFaceName = this.Font.Name + "\0"

};

Win32.ImmSetCompositionFont(hIMC, ref logFont);

this.OnImeStart(hIMC);

}

private void OnImeEndPrivate(IntPtr hIMC) {

Win32.ImmReleaseContext(this.Handle, hIMC);

this.OnImeEnd(hIMC);

}

private void OnImeResultStrPrivate(IntPtr hIMC, string strResult) {

var CompositionForm = new Win32.COMPOSITIONFORM() {

dwStyle = Win32.CFS_FORCE_POSITION,

ptCurrentPos = m_core.Caret.Location

};

Win32.ImmSetCompositionWindow(hIMC, ref CompositionForm);

this.OnImeResultStr(hIMC, strResult);

}

private void m_timer_Tick(object sender, EventArgs e) {

if (m_core.Scroll.HoverScrollBar != STTextBoxScrollInfo.ScrollBarType.None) {

return;

}

lock (m_obj_sync) {

m_core.Scroll.CountDown--;

}

if (m_core.Scroll.CountDown <= 0) {

m_timer.Stop();

this.Invalidate();

}

#endregion

}