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-rw-r--r--Samples/CrowIDE/src/Editors/CodeBuffer/TextBuffer.cs527
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diff --git a/Samples/CrowIDE/src/Editors/CodeBuffer/TextBuffer.cs b/Samples/CrowIDE/src/Editors/CodeBuffer/TextBuffer.cs
deleted file mode 100644
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--- a/Samples/CrowIDE/src/Editors/CodeBuffer/TextBuffer.cs
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@@ -1,527 +0,0 @@
-//
-// CodeTextBuffer.cs
-//
-// Author:
-// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
-//
-// Copyright (c) 2017 jp
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text.RegularExpressions;
-using System.Diagnostics;
-using System.Threading;
-using System.Text;
-
-namespace Crow.Text
-{
- /// <summary>
- /// Code buffer, lines are arranged in a List<string>, new line chars are removed during string.split on '\n...',
- /// </summary>
- public class TextBuffer
- {
- public ReaderWriterLockSlim editMutex = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
- static Regex slb = new Regex ("\\n");//single char line break used internaly
- Regex reghexLineBrk = new Regex(@"\r\n|\r|\n|\\\n");//original text line break regex
-
- #region Events
- public event EventHandler<TextBufferEventArgs> LineUpadateEvent;
- public event EventHandler<TextBufferEventArgs> LineRemoveEvent;
- public event EventHandler<TextBufferEventArgs> LineAdditionEvent;
- public event EventHandler BufferCleared;
- public event EventHandler SelectionChanged;
- public event EventHandler PositionChanged;
- #endregion
-
- StringBuilder buffer = new StringBuilder();
- string lineBreak = Interface.LineBreak;//detected linebreak kind in original source
- List<int> lineLength = new List<int>();//line length table
- /// <summary>
- /// real position in char arrays, tab = 1 char
- /// </summary>
- int _currentLine = 0;
- int _currentCol = 0;
-
- /// <summary>
- /// Gets the total line count.
- /// </summary>
- public int LineCount { get { return lineLength.Count;}}
-
- /// <summary>
- /// get a substring in the buffer
- /// </summary>
- /// <returns>a new string</returns>
- /// <param name="idx">absolute index in the buffer</param>
- /// <param name="length">length of the substring</param>
- public string GetSubString (int idx, int length){
- return buffer.ToString (idx, length);
- }
- /// <summary>
- /// Gets length of a line.
- /// </summary>
- /// <returns>length of line</returns>
- /// <param name="lineIdx">line nuber</param>
- public int GetLineLength (int lineIdx) {
- return lineLength [lineIdx];
- }
- /// <summary>
- /// get a single charactere in the buffer
- /// </summary>
- /// <returns>a single char</returns>
- /// <param name="idx">absolute index in the buffer</param>
- public char GetCharAt (int idx){
- return buffer [idx];
- }
- /// <summary>
- /// return full text with original line breaks
- /// </summary>
- /// <value>a string containing the full text</value>
- public string FullText {
- get { return buffer.Replace("\n", lineBreak).ToString (); }
- set {
- Load (value);
- }
- }
- /// <summary>
- /// Gets the buffer pointer of a line
- /// </summary>
- /// <returns>absolute index of the line in the buffer</returns>
- /// <param name="i">line number</param>
- public int GetBufferIndexOfLine (int i) {
- int ptr = 0;
- editMutex.EnterReadLock ();
- for (int j = 0; j < i; j++) {
- ptr += lineLength [j];
- }
- editMutex.ExitReadLock ();
- return ptr;
- }
- /// <summary>
- /// Gets the buffer pointer for the current position
- /// </summary>
- /// <value>absolute index in the buffer of current position</value>
- public int BufferIndexOfCurrentPosition {
- get {return GetBufferIndexOfLine (_currentLine) + _currentCol;}
- }
- public int this[int i]
- {
- get {
- int ptr = 0;
- editMutex.EnterReadLock ();
- for (int j = 0; j < i; j++) {
- ptr += lineLength [j];
- }
- editMutex.ExitReadLock ();
- return ptr;
- }
- }
- /// <summary>
- /// remove line number i
- /// </summary>
- /// <param name="i">index of the line</param>
- public void RemoveLine(int i){
- editMutex.EnterWriteLock ();
- buffer.Remove (GetBufferIndexOfLine (i), lineLength [i]);
- lineLength.RemoveAt (i);
- editMutex.ExitWriteLock ();
- LineRemoveEvent.Raise (this, new TextBufferEventArgs (i));
- }
- /// <summary>
- /// insert string without linebreaks at position i in buff
- /// </summary>
- /// <param name="i">absolute index in the buffer</param>
- /// <param name="str">linebreak free string</param>
- public void InsertAt(int i, string str){
- editMutex.EnterWriteLock ();
- buffer.Insert (this [i], str);
- lineLength.Insert (i, str.Length);
- editMutex.ExitWriteLock ();
- LineAdditionEvent.Raise (this, new TextBufferEventArgs (i));
- }
- public void AddLine(string str){
- editMutex.EnterWriteLock ();
- if (lineLength.LastOrDefault() == 0) {
- buffer.Append (str);
- lineLength [lineLength.Count - 1] = str.Length;
- lineLength.Add (0);
- }
- editMutex.ExitWriteLock ();
- LineAdditionEvent.Raise (this, new TextBufferEventArgs (lineLength.Count - 1));
- }
- public void AddRange (string[] items){
- int start = lineLength.Count;
- editMutex.EnterWriteLock ();
- for (int i = 0; i < items.Length; i++)
- AddLine (items [i]);
- editMutex.ExitWriteLock ();
- LineAdditionEvent.Raise (this, new TextBufferEventArgs (start, items.Length));
- }
- public void Clear () {
- editMutex.EnterWriteLock ();
- lineLength.Clear ();
- buffer.Clear ();
- editMutex.ExitWriteLock ();
- BufferCleared.Raise (this, null);
- }
- public void UpdateLine(int i, string newContent){
- editMutex.EnterWriteLock ();
- int ptrL = this [i];
- buffer.Remove (ptrL, lineLength [i]);
- buffer.Insert (ptrL, newContent);
- lineLength [i] = newContent.Length;
- editMutex.ExitWriteLock ();
- LineUpadateEvent.Raise (this, new TextBufferEventArgs (i));
- }
- public void AppenedLine(int i, string newContent){
- editMutex.EnterWriteLock ();
- int ptr = this [i] + lineLength [i];
- if (i < LineCount - 1)
- ptr--;
- buffer.Insert(ptr, newContent);
- lineLength [i] += newContent.Length;
- editMutex.ExitWriteLock ();
- LineUpadateEvent.Raise (this, new TextBufferEventArgs (i));
- }
- /// <summary>
- /// Insert new string at caret position, should be sure no line break is inside.
- /// </summary>
- /// <param name="str">String.</param>
- public void InsertAt(string str)
- {
- if (!SelectionIsEmpty)
- this.Delete ();
-
- editMutex.EnterWriteLock ();
-
- string tmp = reghexLineBrk.Replace (str, "\n");//use single char line break in buffer
- int buffPtr = this [CurrentLine] + CurrentColumn;
- buffer.Insert (buffPtr, tmp);
-
- int lPtr = CurrentLine, strPtr = 0;
- int remainingLength = lineLength [lPtr] - CurrentColumn;
- lineLength [lPtr] = CurrentColumn;
- foreach (Match match in slb.Matches(tmp))
- {
- lineLength [lPtr] += match.Index + 1 - strPtr;
- lPtr++;
- lineLength.Insert (lPtr, 0);
- strPtr = match.Index + 1;
- //CurrentLine++;
- }
- remainingLength += tmp.Length - strPtr;
- lineLength [lPtr] += remainingLength;
-
- CurrentLine = lPtr;
- if (strPtr == 0)
- CurrentColumn += tmp.Length;
- else
- CurrentColumn = tmp.Length - strPtr;
-
- editMutex.ExitWriteLock ();
- if (strPtr>0)
- LineAdditionEvent.Raise (this, null);
- else
- LineUpadateEvent.Raise (this, null);
- }
- /// <summary>
- /// Insert a line break.
- /// </summary>
- public void InsertLineBreak()
- {
- editMutex.EnterWriteLock ();
- buffer.Insert (this [CurrentLine] + CurrentColumn, '\n');
- int lgdiff = lineLength [CurrentLine] - CurrentColumn;
- lineLength.Insert (CurrentLine + 1, lineLength [CurrentLine] - CurrentColumn);
- lineLength [CurrentLine] = CurrentColumn + 1;
- editMutex.ExitWriteLock ();
- LineAdditionEvent.Raise (this, null);
- CurrentColumn = 0;
- CurrentLine++;
- }
- public void Delete()
- {
- editMutex.EnterWriteLock ();
- if (SelectionIsEmpty) {
- if (CurrentColumn == 0) {
- if (CurrentLine == 0) {
- editMutex.ExitWriteLock ();
- return;
- }
-
- buffer.Remove (this [CurrentLine] - 1, 1);
-
- int col = lineLength [CurrentLine - 1] - 1;
- lineLength [CurrentLine - 1] += lineLength [CurrentLine] - 1;
- lineLength.RemoveAt (CurrentLine);
-
- CurrentLine--;
- CurrentColumn = col;
-
- editMutex.ExitWriteLock ();
- LineRemoveEvent.Raise (this, null);
- return;
- }
- CurrentColumn--;
- buffer.Remove (this [CurrentLine] + CurrentColumn, 1);
- lineLength [CurrentLine]--;
- } else {
- int linesToRemove = SelectionEnd.Y - SelectionStart.Y;
- int ptr = this [SelectionStart.Y] + SelectionStart.X;
- int length = lineLength [SelectionStart.Y] - SelectionStart.X;
- int l = 1;
- while (l <= linesToRemove ) {
- length += lineLength [SelectionStart.Y + l];
- l++;
- }
- length -= lineLength [SelectionEnd.Y] - SelectionEnd.X;
- buffer.Remove (ptr, length);
- lineLength [SelectionStart.Y] = SelectionStart.X + lineLength [SelectionEnd.Y] - SelectionEnd.X;
- lineLength.RemoveRange (SelectionStart.Y + 1, linesToRemove);
-
- CurrentLine = SelectionStart.Y;
- CurrentColumn = SelectionStart.X;
- ResetSelection ();
-
- if (linesToRemove > 0)
- LineRemoveEvent.Raise (this, null);
- else
- LineUpadateEvent.Raise (this, null);
- }
- editMutex.ExitWriteLock ();
- }
- public void Load(string rawSource) {
- this.Clear();
-
- if (string.IsNullOrEmpty (rawSource))
- return;
-
- lineBreak = reghexLineBrk.Match (rawSource).Value;//store original line break
- string tmp = reghexLineBrk.Replace (rawSource, "\n");//use single char line break in buffer
- int ptr = 0;
- foreach (Match match in slb.Matches(tmp))
- {
- int l = match.Index + 1;
- int lg = l - ptr;
- lineLength.Add (lg);
- ptr = l;
- }
- lineLength.Add (0);
-
- buffer = new StringBuilder (tmp);
- }
-
-// public int CurrentTabulatedColumn {
-// get {
-//// return lines [_currentLine].Content.Substring (0, _currentCol).
-//// Replace ("\t", new String (' ', Interface.TabSize)).Length;
-// }
-// }
-
- #region moving cursor an selection
- Point selStartPos = -1; //selection start (row,column)
- Point selEndPos = -1; //selection end (row,column)
-
- public bool SelectionInProgress { get { return selStartPos >= 0; }}
- public void SetSelStartPos () {
- selStartPos = selEndPos = CurrentPosition;
- SelectionChanged.Raise (this, null);
- }
- public void SetSelEndPos () {
- selEndPos = CurrentPosition;
- SelectionChanged.Raise (this, null);
- }
- /// <summary>
- /// Set selection in buffer to -1, empty selection
- /// </summary>
- public void ResetSelection () {
- selStartPos = selEndPos = -1;
- SelectionChanged.Raise (this, null);
- }
- /// <summary>
- /// ordered selection start and end positions in char units
- /// </summary>
- public Point SelectionStart {
- get { return selEndPos < 0 || selStartPos.Y < selEndPos.Y ? selStartPos :
- selStartPos.Y > selEndPos.Y ? selEndPos :
- selStartPos.X < selEndPos.X ? selStartPos : selEndPos; }
- }
- public Point SelectionEnd {
- get { return selEndPos < 0 || selStartPos.Y > selEndPos.Y ? selStartPos :
- selStartPos.Y < selEndPos.Y ? selEndPos :
- selStartPos.X > selEndPos.X ? selStartPos : selEndPos; }
- }
- public bool SelectionIsEmpty
- { get { return selEndPos == selStartPos; } }
- /// <summary>
- /// Current column in buffer coordinate, tabulation = 1 char
- /// </summary>
- public int CurrentColumn{
- get { return _currentCol; }
- set {
- if (value == _currentCol)
- return;
-
- editMutex.EnterWriteLock ();
-
- if (value < 0)
- _currentCol = 0;
- else if (value >= lineLength [_currentLine]) {
- if (_currentLine < LineCount -1 && value > lineLength [_currentLine] - 1)
- _currentCol = lineLength [_currentLine] - 1;
- else
- _currentCol = lineLength [_currentLine];
- }else
- _currentCol = value;
-
- editMutex.ExitWriteLock ();
-
- PositionChanged.Raise (this, null);
- }
- }
- /// <summary>
- /// Current row in buffer coordinate, tabulation = 1 char
- /// </summary>
- public int CurrentLine{
- get { return _currentLine; }
- set {
- if (value == _currentLine)
- return;
-
- editMutex.EnterWriteLock ();
-
- if (value >= lineLength.Count)
- _currentLine = lineLength.Count-1;
- else if (value < 0)
- _currentLine = 0;
- else
- _currentLine = value;
-
- int c = _currentCol;
- _currentCol = 0;
- CurrentColumn = c;
-
- editMutex.ExitWriteLock();
-
- PositionChanged.Raise (this, null);
- }
- }
- /// <summary>
- /// Current position in buffer coordinate, tabulation = 1 char
- /// </summary>
- public Point CurrentPosition {
- get { return new Point(CurrentColumn, CurrentLine); }
- }
- /// <summary>
- /// get char at current position in buffer
- /// </summary>
- protected Char CurrentChar { get { return buffer[this [CurrentLine]]; } }
- public string SelectedText {
- get {
- if (SelectionIsEmpty)
- return "";
- Point selStart = SelectionStart;
- Point selEnd = SelectionEnd;
-
- int ptr = this [selStart.Y] + selStart.X;
- int length = lineLength[selStart.Y] - selStart.X;
- for (int i = selStart.Y+1; i <= selEnd.Y; i++)
- length += lineLength [i];
- length -= lineLength[selEnd.Y] - selEnd.X;
-
- return buffer.ToString (ptr, length);
- }
- }
-
- public void GotoWordStart(){
- if (_currentCol == 0)
- MoveLeft ();
- if (_currentCol == 0)
- return;
- int ptrStart = BufferIndexOfCurrentPosition;
- int ptr = ptrStart;
- char c;
- //skip white spaces
- do {
- ptr--;
- c = this.GetCharAt (ptr);
- } while (!char.IsLetterOrDigit (c) && c != '\n' && ptr > 1);
-
- do {
- ptr--;
- c = this.GetCharAt (ptr);
- } while (char.IsLetterOrDigit (c) && c != '\n' && ptr > 1);
-
- if (ptr == 0)
- CurrentColumn = 0;
- else
- CurrentColumn -= ptrStart - ptr - 1;
- }
- public void GotoWordEnd(){
- int limx = GetLineLength (_currentLine);
- if (_currentLine < lineLength.Count - 1)
- limx--;
-
- if (_currentCol == limx) {
- MoveRight ();
- limx = GetLineLength (_currentLine);
- if (_currentLine < lineLength.Count - 1)
- limx--;
- }
-
- int ptrLine = GetBufferIndexOfLine(_currentLine);
- int ptrCol = _currentCol;
-
- char c;
- //skip white spaces
- do {
- c = GetCharAt (ptrLine+ptrCol);
- ptrCol++;
- } while (!char.IsLetterOrDigit (c) && ptrCol < limx);
-
- do {
- c = GetCharAt (ptrLine + ptrCol);
- ptrCol++;
- } while (char.IsLetterOrDigit (c) && ptrCol < limx);
- CurrentColumn = ptrCol - 1;
- }
- /// <summary>
- /// Moves cursor one char to the left, move up if cursor reaches start of line
- /// </summary>
- public void MoveLeft(){
- if (CurrentColumn == 0) {
- CurrentLine--;
- CurrentColumn = int.MaxValue;
- } else
- CurrentColumn--;
- }
- /// <summary>
- /// Moves cursor one char to the right, move down if cursor reaches end of line
- /// </summary>
- public void MoveRight(){
- if (_currentLine < LineCount -1){
- if (CurrentColumn >= lineLength [CurrentLine] - 1) {
- CurrentColumn = 0;
- CurrentLine++;
- return;
- }
- }
- CurrentColumn++;
- }
-
- #endregion
- }
-}
-
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