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GeezerVison is showing github.com — STTextBox/ST.Library.UI.STTextBox/TextManager/TextManager.cs at main · DebugST/STTextBox Expand file tree/ Copy pathTextManager.csMore file actions 454 lines (413 loc) · 17.3 KB / Copy pathTextManager.csFile metadata and controls454 lines (413 loc) · 17.3 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Collections; namespace ST.Library.UI.STTextBox { public class TextManager : IEnumerable<TextLine> { public int LineCount { get { return m_nLineCount; } } public int TextLength { get { return m_nTextLength; } } public TextLine this[int nIndex] { get { if (nIndex < 0 || nIndex >= m_nLineCount) { throw new ArgumentOutOfRangeException("nIndex"); } return m_lines[nIndex]; } } private int m_nLineCount; private int m_nTextLength; private TextLine[] m_lines; public TextManager() { m_lines = new TextLine[2]; m_lines[0] = new TextLine(); m_nLineCount++; } public event TextManagerLineEventHandler LineAdded; public event TextManagerLineEventHandler LineRemoved; public event TextManagerLineEventHandler LineChanged; public event TextManagerTextEventHandler TextChanged; public event TextManagerTextEventHandler TextStartChange; public event EventHandler LineCountChanged; #region Event protected virtual void OnTextStartChange(TextManagerTextEventArgs e) { if (this.TextStartChange != null) { this.TextStartChange(this, e); } } protected virtual void OnLineAdded(TextManagerLineEventArgs e) { if (this.LineAdded != null) { this.LineAdded(this, e); } } protected virtual void OnRemoveLine(TextManagerLineEventArgs e) { if (this.LineRemoved != null) { this.LineRemoved(this, e); } } protected virtual void OnTextChanged(TextManagerTextEventArgs e) { if (this.TextChanged != null) { this.TextChanged(this, e); } } protected virtual void OnLineChanged(TextManagerLineEventArgs e) { if (this.LineChanged != null) { this.LineChanged(this, e); } } protected virtual void OnLineCountChanged(EventArgs e) { if (this.LineCountChanged != null) { this.LineCountChanged(this, e); } } #endregion public string GetText() { return this.GetStringBuilder(0, m_nTextLength).ToString(); } public string GetText(int nIndex, int nLen) { return this.GetStringBuilder(nIndex, nLen).ToString(); } public StringBuilder GetStringBuilder() { return this.GetStringBuilder(0, m_nTextLength); } public StringBuilder GetStringBuilder(int nIndex, int nLen) { StringBuilder sb = new StringBuilder(); if (nLen == 0) { return sb; } int nIndexStart = this.GetLineIndexFromCharIndex(nIndex); int nIndexEnd = this.GetLineIndexFromCharIndex(nIndex + nLen); TextLine stLineStart = this[nIndexStart]; TextLine stLineEnd = this[nIndexEnd]; if (stLineStart == stLineEnd) { sb.Append(stLineStart.RawString.Substring(nIndex - stLineStart.IndexOfFirstChar, nLen)); return sb; } int nLenAdded = 0; sb.Append(stLineStart.RawString.Substring(nIndex - stLineStart.IndexOfFirstChar)); nLenAdded += sb.Length; for (int i = nIndexStart + 1; i < nIndexEnd; i++) { sb.Append(this[i].RawString); nLenAdded += this[i].RawString.Length; } sb.Append(stLineEnd.RawString.Substring(0, nLen - nLenAdded)); return sb; } public TextHistoryRecord SetText(string strText) { return this.SetText(0, m_nTextLength, strText); } public TextHistoryRecord SetText(int nIndex, string strText) { return this.SetText(nIndex, 0, strText); } /// <summary> /// Modify the source text /// </summary> /// <param name="nIndex">The index from source string</param> /// <param name="nLen">The length of the text to be deleted</param> /// <param name="strText">The text that will be add</param> public TextHistoryRecord SetText(int nIndex, int nLen, string strText) { return this.SetText(nIndex, nLen, strText, false); } public TextHistoryRecord[] RunHistory(TextHistoryRecord[] histories) { if (histories == null || histories.Length == 0) { return new TextHistoryRecord[0]; } int nLineCount = m_nLineCount; this.OnTextStartChange(new TextManagerTextEventArgs(new List<TextHistoryRecord>(histories))); var ret = new TextHistoryRecord[histories.Length]; for (int i = 0; i < histories.Length; i++) { var h = histories[i]; ret[i] = this.SetText(h.Index, h.OldText.Length, h.NewText, true); } if (m_nLineCount != nLineCount) { this.OnLineCountChanged(EventArgs.Empty); } this.OnTextChanged(new TextManagerTextEventArgs(new List<TextHistoryRecord>(ret))); return ret; } public int Clear() { int nRet = m_nTextLength; m_lines = new TextLine[2]; m_lines[0] = new TextLine(); m_nLineCount = 1; m_nTextLength = 0; return nRet; } public TextLine GetLineFromCharIndex(int nIndex) { nIndex = this.GetLineIndexFromCharIndex(nIndex); return m_lines[nIndex]; } public int GetLineIndexFromCharIndex(int nIndex) { if (m_nLineCount == 0) { return -1; } if (nIndex <= 0) { return 0; } if (nIndex >= m_lines[m_nLineCount - 1].IndexOfFirstChar + m_lines[m_nLineCount - 1].RawString.Length) { return m_nLineCount - 1; } int nLeft = 0, nRight = m_nLineCount - 1, nMid = 0; while (nLeft <= nRight) { nMid = (nRight + nLeft) >> 1; if (nIndex >= m_lines[nMid].IndexOfFirstChar + m_lines[nMid].RawString.Length) { nLeft = nMid + 1; } else if (nIndex < m_lines[nMid].IndexOfFirstChar) { nRight = nMid - 1; } else { return nMid; } } return -1; } public int GetLineIndexFromLine(TextLine line) { int nLeft = 0, nRight = m_nLineCount - 1, nMid = 0; while (nLeft <= nRight) { nMid = (nLeft + nRight) >> 1; if (line.IndexOfFirstChar < m_lines[nMid].IndexOfFirstChar) { nRight = nMid - 1; } else if (line.IndexOfFirstChar > m_lines[nMid].IndexOfFirstChar) { nLeft = nMid + 1; } else { if (m_lines[nMid] == line) { return nMid; } return -1; } } return -1; } public TextHistoryRecord[] InsertAtStart(int nLineIndex, int nLineCount, string strText) { if (nLineIndex < 0) { nLineCount += nLineCount; nLineIndex = 0; } if (nLineIndex >= m_nLineCount) { return new TextHistoryRecord[0]; } if (nLineIndex + nLineCount > m_nLineCount) { nLineCount = m_nLineCount - nLineIndex; } TextHistoryRecord[] lst = new TextHistoryRecord[nLineCount]; this.OnTextStartChange(new TextManagerTextEventArgs(new List<TextHistoryRecord>(lst))); int nAddCounter = 0; for (int i = 0; i < nLineCount; i++) { var line = m_lines[nLineIndex + i]; line.RawString = strText + line.RawString; line.IndexOfFirstChar += nAddCounter; var thr = new TextHistoryRecord() { Index = line.IndexOfFirstChar, OldText = string.Empty, NewText = strText }; lst[i] = thr; this.OnLineChanged(new TextManagerLineEventArgs(nLineIndex + i, line, thr)); nAddCounter += strText.Length; } for (int i = nLineIndex + nLineCount; i < m_nLineCount; i++) { m_lines[i].IndexOfFirstChar += nAddCounter; } m_nTextLength += nAddCounter; this.OnTextChanged(new TextManagerTextEventArgs(new List<TextHistoryRecord>(lst))); return lst; } public List<TextHistoryRecord> TrimStartTab(int nLineIndex, int nLineCount, int nTabSize) { List<TextHistoryRecord> lst = new List<TextHistoryRecord>(); if (nLineIndex < 0) { nLineCount += nLineCount; nLineIndex = 0; } if (nLineIndex >= m_nLineCount) { return lst; } if (nLineIndex + nLineCount > m_nLineCount) { nLineCount = m_nLineCount - nLineIndex; } bool bStarted = false; int nRemoveCounter = 0, nRemoveLen = 0; for (int i = 0; i < nLineCount; i++) { nRemoveLen = 0; var thr = new TextHistoryRecord(); var line = m_lines[nLineIndex + i]; if (line.RawString[0] == '\t') { nRemoveLen = 1; } else { while (nRemoveLen < nTabSize) { switch (line.RawString[nRemoveLen]) { case ' ': nRemoveLen++; continue; case '\t': nRemoveLen++; continue; default: break; } break; } } line.IndexOfFirstChar -= nRemoveCounter; if (nRemoveLen == 0) continue; if (!bStarted) { this.OnTextStartChange(new TextManagerTextEventArgs(lst)); bStarted = true; } thr.OldText = line.RawString.Substring(0, nRemoveLen); thr.Index = line.IndexOfFirstChar; thr.NewText = ""; line.RawString = line.RawString.Substring(nRemoveLen); nRemoveCounter += nRemoveLen; this.OnLineChanged(new TextManagerLineEventArgs(nLineIndex + i, line, thr)); lst.Add(thr); } if (lst.Count == 0) return lst; for (int i = nLineIndex + nLineCount; i < m_nLineCount; i++) { m_lines[i].IndexOfFirstChar -= nRemoveCounter; } m_nTextLength -= nRemoveCounter; this.OnTextChanged(new TextManagerTextEventArgs(lst)); return lst; } #region Private private TextHistoryRecord SetText(int nIndex, int nLen, string strText, bool isHistory) { if (strText == null) { strText = ""; } string strOld = string.Empty; if (nLen != 0) { strOld = this.GetText(nIndex, nLen); } if (strOld == strText) { return TextHistoryRecord.Empty; } var historyRecord = new TextHistoryRecord() { Index = nIndex, OldText = strOld, NewText = strText }; if (!isHistory) { var lstHistory = new List<TextHistoryRecord>() { historyRecord }; this.OnTextStartChange(new TextManagerTextEventArgs(lstHistory)); historyRecord = lstHistory[0]; } List<TextLine> lst = this.GetTexLines(historyRecord.NewText); int nIndexStartLine = this.GetLineIndexFromCharIndex(nIndex); int nIndexEndLine = this.GetLineIndexFromCharIndex(nIndex + nLen); var line_start = m_lines[nIndexStartLine]; var line_end = m_lines[nIndexEndLine]; string strLeft = line_start.RawString.Substring(0, nIndex - line_start.IndexOfFirstChar); string strRight = line_end.RawString.Substring(nIndex + nLen - line_end.IndexOfFirstChar); lst[0].RawString = strLeft + lst[0].RawString; lst[0].IndexOfFirstChar = line_start.IndexOfFirstChar; lst[lst.Count - 1].RawString += strRight; int nIncrement = historyRecord.NewText.Length - nLen; m_nTextLength += nIncrement; line_start.RawString = lst[0].RawString; this.OnLineChanged(new TextManagerLineEventArgs(strLeft.Length, line_start, historyRecord)); int nShouldRemoveLines = nIndexEndLine - nIndexStartLine; int nShouldAddLines = lst.Count - 1 - nShouldRemoveLines; for (int i = nIndexStartLine + 1; i <= nIndexEndLine; i++) { this.OnRemoveLine(new TextManagerLineEventArgs(i, m_lines[i], historyRecord)); } if (nShouldAddLines > 0) { this.InsertEmptyLines(nIndexStartLine, nShouldAddLines, nIncrement); } else { this.RemoveLines(nIndexStartLine + 1, -nShouldAddLines, nIncrement, historyRecord); } for (int i = 1, j = nIndexStartLine + 1; i < lst.Count; i++, j++) { var prev_line = m_lines[j - 1]; m_lines[j] = lst[i]; m_lines[j].IndexOfFirstChar = prev_line.IndexOfFirstChar + prev_line.RawString.Length; this.OnLineAdded(new TextManagerLineEventArgs(j, m_lines[j], historyRecord)); } if (nShouldAddLines == 0) { for (int i = nIndexStartLine + 1; i < m_nLineCount; i++) { TextLine prve_line = m_lines[i - 1]; m_lines[i].IndexOfFirstChar = prve_line.IndexOfFirstChar + prve_line.RawString.Length; } } else { m_nLineCount += nShouldAddLines; if (!isHistory) { this.OnLineCountChanged(EventArgs.Empty); } } if (!isHistory) { this.OnTextChanged(new TextManagerTextEventArgs(new List<TextHistoryRecord>() { historyRecord })); } return historyRecord; } private List<TextLine> GetTexLines(string strText) { int nIndexStart = 0, nLen = 0; TextLine line = new TextLine(); List<TextLine> lst = new List<TextLine>(); lst.Add(line); for (int i = 0; i < strText.Length; i++) { char c = strText[i]; nLen++; if (c == '\n' || c == '\r') { if (c == '\r' && i + 1 < strText.Length && strText[i + 1] == '\n') { nLen++; i++; } line.RawString = strText.Substring(nIndexStart, nLen); line = new TextLine(); lst.Add(line); nIndexStart = i + 1; nLen = 0; } } if (nLen != 0) { line.RawString = strText.Substring(nIndexStart, nLen); } return lst; } private void InsertEmptyLines(int nIndex, int nCount, int nOffsetIncrement) { if (nCount == 0) return; this.EnsureSpace(nCount); for (int i = m_nLineCount + nCount - 1; i > nIndex + nCount; i--) { m_lines[i] = m_lines[i - nCount]; if (m_lines[i] == null) { m_lines[i] = new TextLine(); } m_lines[i].IndexOfFirstChar += nOffsetIncrement; } } private void RemoveLines(int nIndex, int nCount, int nOffsetIncrement, TextHistoryRecord history) { if (nCount == 0) return; int nCounter = nCount; for (int i = nIndex; i < m_nLineCount - nCount; i++) { if (nCounter > 0) { nCounter--; } m_lines[i] = m_lines[i + nCount]; m_lines[i].IndexOfFirstChar += nOffsetIncrement; } } private void EnsureSpace(int nCount) { if (m_nLineCount + nCount <= m_lines.Length) { return; } int nLen = m_nLineCount + nCount; TextLine[] new_arr = new TextLine[Math.Max(m_nLineCount + nCount, m_lines.Length << 1)]; Array.Copy(m_lines, new_arr, m_lines.Length); m_lines = new_arr; } #endregion #region Interface public IEnumerator<TextLine> GetEnumerator() { for (int i = 0; i < m_nLineCount; i++) { yield return m_lines[i]; } } IEnumerator IEnumerable.GetEnumerator() { return this.GetEnumerator(); } #endregion } } |
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