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modify TextHistory and readme
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‎README.CN.md‎

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[![.Net35](https://img.shields.io/badge/DotNet-3.5-blue)](https://www.microsoft.com/zh-cn/download/details.aspx?id=25150)
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[![LICENSE](https://img.shields.io/badge/License-MIT-green)](https://github.com/DebugST/STNodeEditor/blob/main/LICENSE)
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# STTextBox
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`STTextBox`是我和我的朋友[netero](https://github.com/0x54164)使用`GDI`构建的一个`WinForm`控件，可以支持`Emoji`
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我们采用MIT开源协议，使用`.Net3.5` + `vs2010`构建的项目，所以几乎可以兼容任何VS版本，
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在开发的过程中我们还衍生出两个额外的开源项目：
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[emoji-svg-render](https://github.com/DebugST/emoji-svg-render),
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[STGraphemeSplitter](https://github.com/DebugST/STGraphemeSplitter)
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因为能力有限，很多功能我们都无法很好的实现，所以将一些有代表性的功能独立成了接口。
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如果有能力且愿意去修改它们的开发者可以直接继承接口实现，不用在项目中到处找代码了。
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![Emoji](https://s3.bmp.ovh/imgs/2022/08/01/870c128600fcaf5b.png)
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你可以在`STTextBox`中使用`Emoji`,在`demos_bin`的样例我们使用的是推特的表情符[twemoji](https://github.com/twitter/twemoji).
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更多信息可以查看: [emoji-svg-render](https://github.com/DebugST/emoji-svg-render)
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![Alpha](https://s3.bmp.ovh/imgs/2022/08/01/9adb88ed6966ba5b.png)
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在`STTextBox`中的所有颜色你都可以使用`alpha`通道，当然代价就是渲染的速度会变慢。
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![Style](https://s3.bmp.ovh/imgs/2022/08/01/d18e93176e4a4e48.png)
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你可以自定义文本样式，通过实现`ITextStyleMonitor`接口，在`STTextBox`中内置了4个样式监视器。
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`KeyWorldStyleMonitor` `CSharpStyleMonitor` `LinkStyleMonitor` `SelectionStyleMonitor`。
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注意：`STTextBox`的渲染速度和内容没太大关系，而是和当前UI中需要绘制的字符个数有关，因为一些原因我们采用的是逐个字符绘制。
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为了让颜色可以使用`Alpha`通道，所以我们并没有对绘制的内容做缓存处理，因为背景可能是变化的。而且要做缓存也是一个麻烦事情。
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所以我们暂时没有考虑极端情况的渲染速度。
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‎README.md‎

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[![.Net35](https://img.shields.io/badge/DotNet-3.5-blue)](https://www.microsoft.com/zh-cn/download/details.aspx?id=25150)
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[![LICENSE](https://img.shields.io/badge/License-MIT-green)](https://github.com/DebugST/STNodeEditor/blob/main/LICENSE)
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[简体中文](./README.CN.md)
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# STTextBox
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STTextBox is a pure GDI-drawn WinForm control, which can support transparent colors and Emoji, etc., and can customize the display style of text through the text style monitor.
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@@ -32,3 +34,10 @@ In `STTextBox` all the color you can use `alpha`, Of course his efficiency is al
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You can also customize text styles, by implementing the `ITextStyleMonitor` interface, we have four realities built in.
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`KeyWorldStyleMonitor` `CSharpStyleMonitor` `LinkStyleMonitor` `SelectionStyleMonitor`.
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Note: The rendering speed of `STTextBox` has nothing to do with the content,
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but is related to the number of characters that need to be drawn in the current UI.
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For some reasons, we use character-by-character drawing.
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In order for the colors to use the `Alpha` channel, we don't cache what's being drawn,
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since the background may change. And doing caching is also a hassle.
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So we have not considered the rendering speed of extreme cases for the time being.
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‎ST.Library.UI.STTextBox/Implementation/TextHistory.cs‎

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@@ -10,18 +10,13 @@ public class TextHistory : ITextHistory
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private int m_nIndex;
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private int m_nCount;
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private int m_nMax;
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private TextManager m_textManager;
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private TextHistoryRecord[][] m_arr;
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public TextHistory(int nCount) {
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m_nMax = nCount;
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m_arr = new TextHistoryRecord[nCount][];
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}
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internal void SetTextManager(TextManager textManager) {
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m_textManager = textManager;
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}
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public void SetHistory(TextHistoryRecord[] histories) {
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if (m_nIndex == m_nMax) {
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for (int i = 1; i < m_arr.Length; i++) {
@@ -37,15 +32,7 @@ public TextHistoryRecord[] GetUndo() {
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if (m_nIndex == 0) { //not have history
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return null;
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}
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var old = m_arr[--m_nIndex];
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var ret = new TextHistoryRecord[old.Length];
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for (int i = old.Length - 1, j = 0; i >= 0; i--, j++) {
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ret[j] = old[i];
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var temp = old[i].NewText;
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ret[i].NewText = ret[i].OldText;
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ret[i].OldText = temp;
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}
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return ret;
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return m_arr[--m_nIndex];
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}
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public TextHistoryRecord[] GetRedo() {

‎ST.Library.UI.STTextBox/Implementation/TextView/NoWrapTextView.cs‎

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@@ -225,7 +225,6 @@ protected override int OnDrawLine(ISTTextBoxRender render, TextLine line, int nX
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int nCurrentCharIndex = line.IndexOfFirstChar + nIndexEach;
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bool bIsEmoji = false;
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TextStyleRange tsi = TextStyleRange.Empty;
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c.IGraphemeSplitter.Each(line.RawString, nIndexEach, (str, nStart, nLen) => {
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string strChar = str.Substring(nStart, nLen);
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if (c.IsEmoji(strChar)) {

‎ST.Library.UI.STTextBox/Implementation/TextView/WrapTextView.cs‎

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@@ -401,7 +401,7 @@ public override FindInfo FindFromPoint(Point pt) {
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fi.Location = new Point((int)nX + base.TextRectangle.X + subLine.X, base.TextRectangle.Y + nYOffset * c.LineHeight);
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}
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fi.Find = true;
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Console.WriteLine("->>>>>>>>>>>>>>>>>>>>>" + line.RawString.Substring(subLine.Index, subLine.Length) + " -- " + fi.IndexOfChar);
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//Console.WriteLine("->>>>>>>>>>>>>>>>>>>>>" + line.RawString.Substring(subLine.Index, subLine.Length) + " -- " + fi.IndexOfChar);
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return fi;
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}
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‎ST.Library.UI.STTextBox/STTextBox.MouseEvent.cs‎

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@@ -79,8 +79,8 @@ protected override void OnMouseMove(MouseEventArgs e) {
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return;
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}
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if (e.Button == System.Windows.Forms.MouseButtons.Left) {
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var sw = new System.Diagnostics.Stopwatch();
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sw.Start();
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//var sw = new System.Diagnostics.Stopwatch();
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//sw.Start();
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var fi = c.ITextView.FindFromPoint(e.Location);
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if (!fi.Find) return;
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c.Caret.CopyFromFindInfo(fi);
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c.Selection.SetSelection(c.Selection.AnchorIndex, nIndex);
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c.ITextView.SetCaretPostion(fi.IndexOfChar);
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c.ITextView.ScrollToCaret();
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sw.Stop();
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Console.WriteLine("CheckSelection: - " + sw.ElapsedMilliseconds);
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//sw.Stop();
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//Console.WriteLine("CheckSelection: - " + sw.ElapsedMilliseconds);
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this.Invalidate();
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return;
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}
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protected override void OnMouseWheel(MouseEventArgs e) {
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base.OnMouseWheel(e);
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DateTime dt_now = DateTime.Now;
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Console.WriteLine("Scroll: --------------------- " + dt_now.Subtract(m_dt_last_scroll_v).TotalMilliseconds);
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//Console.WriteLine("Scroll: --------------------- " + dt_now.Subtract(m_dt_last_scroll_v).TotalMilliseconds);
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int nIncrement = 1;
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int nTemp = (int)dt_now.Subtract(m_dt_last_scroll_v).TotalMilliseconds;
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foreach (var v in m_arr_si) {
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protected virtual void OnMouseHWheel(MouseEventArgs e) {
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DateTime dt_now = DateTime.Now;
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Console.WriteLine("Scroll: --------------------- " + dt_now.Subtract(m_dt_last_scroll_h).TotalMilliseconds);
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//Console.WriteLine("Scroll: --------------------- " + dt_now.Subtract(m_dt_last_scroll_h).TotalMilliseconds);
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int nIncrement = 1;
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int nTemp = (int)dt_now.Subtract(m_dt_last_scroll_h).TotalMilliseconds;
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foreach (var v in m_arr_si) {

‎ST.Library.UI.STTextBox/STTextBox.cs‎

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@@ -185,32 +185,32 @@ protected override void WndProc(ref Message m) {
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protected override void OnPaint(PaintEventArgs e) {
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base.OnPaint(e);
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System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
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sw.Start();
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//System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
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//sw.Start();
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this.XDPIZoom = e.Graphics.DpiX / 96;
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this.YDPIZoom = e.Graphics.DpiY / 96;
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var render = m_core.ITextBoxRender;
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try {
194-
render.OnBeginPaint(e.Graphics);
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m_core.ITextView.OnDrawView(render);
196-
if (this._AllowScrollBar && m_core.Scroll.CountDown != 0) {
197-
this.OnCalcScrollRectangle(m_core.Scroll);
198-
bool bFlag = true;
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if (m_core.Scroll.HBackRect != m_core.Scroll.HThumbRect) {
200-
this.OnDrawHScrollBar(render, m_core.Scroll);
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} else { bFlag = false; }
202-
if (m_core.Scroll.VBackRect != m_core.Scroll.VThumbRect) {
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this.OnDrawVScrollBar(render, m_core.Scroll);
204-
} else { bFlag = false; }
205-
if (bFlag) this.OnDrawScrollBarCorner(render, m_core.Scroll);
206-
}
207-
this.OnDrawBorder(render);
208-
render.OnEndPaint(e.Graphics);
209-
} catch (Exception ex) {
210-
MessageBox.Show(ex.Message + "\r\n\r\n" + ex.StackTrace);
193+
//try {
194+
render.OnBeginPaint(e.Graphics);
195+
m_core.ITextView.OnDrawView(render);
196+
if (this._AllowScrollBar && m_core.Scroll.CountDown != 0) {
197+
this.OnCalcScrollRectangle(m_core.Scroll);
198+
bool bFlag = true;
199+
if (m_core.Scroll.HBackRect != m_core.Scroll.HThumbRect) {
200+
this.OnDrawHScrollBar(render, m_core.Scroll);
201+
} else { bFlag = false; }
202+
if (m_core.Scroll.VBackRect != m_core.Scroll.VThumbRect) {
203+
this.OnDrawVScrollBar(render, m_core.Scroll);
204+
} else { bFlag = false; }
205+
if (bFlag) this.OnDrawScrollBarCorner(render, m_core.Scroll);
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}
212-
sw.Stop();
213-
Console.WriteLine("OnPaint - " + sw.ElapsedMilliseconds + "ms");
207+
this.OnDrawBorder(render);
208+
render.OnEndPaint(e.Graphics);
209+
//} catch (Exception ex) {
210+
// MessageBox.Show(ex.Message + "\r\n\r\n" + ex.StackTrace);
211+
//}
212+
//sw.Stop();
213+
//Console.WriteLine("OnPaint - " + sw.ElapsedMilliseconds + "ms");
214214
}
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216216
protected virtual void OnDrawBorder(ISTTextBoxRender render) {
@@ -338,6 +338,15 @@ private void RunHistory(bool isUndo) {
338338
if (histories == null || histories.Length == 0) {
339339
return;
340340
}
341+
if (isUndo) {
342+
var temp = new TextHistoryRecord[histories.Length];
343+
for (int i = 0; i < histories.Length; i++) {
344+
temp[i] = histories[i];
345+
temp[i].NewText = histories[i].OldText;
346+
temp[i].OldText = histories[i].NewText;
347+
}
348+
histories = temp;
349+
}
341350
histories = c.TextManager.RunHistory(histories);
342351
var last = histories[histories.Length - 1];
343352
c.Selection.SetSelection(last.Index, last.Index + last.NewText.Length);

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