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Copy pathTextEditor.cs
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1456 lines (1274 loc) · 52.3 KB
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// Unity C# reference source
// Copyright (c) Unity Technologies. For terms of use, see
// https://unity3d.com/legal/licenses/Unity_Reference_Only_License
using System;
using UnityEngine.Bindings;
using UnityEngine.Scripting;
using System.Collections.Generic;
namespace UnityEngine
{
public class TextEditor
{
public TouchScreenKeyboard keyboardOnScreen = null;
public int controlID = 0;
public GUIStyle style = GUIStyle.none;
public bool multiline = false;
public bool hasHorizontalCursorPos = false;
public bool isPasswordField = false;
[VisibleToOtherModules("UnityEngine.UIElementsModule")]
internal bool m_HasFocus;
public Vector2 scrollOffset = Vector2.zero; // The text field can have a scroll offset in order to display its contents
private GUIContent m_Content = new GUIContent();
private Rect m_Position;
private int m_CursorIndex = 0;
private int m_SelectIndex = 0;
private bool m_RevealCursor = false;
[Obsolete("Please use 'text' instead of 'content'", false)]
public GUIContent content
{
get { return m_Content; }
set { m_Content = value; }
}
public string text
{
get { return m_Content.text; }
set
{
m_Content.text = value ?? string.Empty;
EnsureValidCodePointIndex(ref m_CursorIndex);
EnsureValidCodePointIndex(ref m_SelectIndex);
}
}
public Rect position
{
get { return m_Position; }
set
{
if (m_Position == value)
return;
m_Position = value;
UpdateScrollOffset();
}
}
internal virtual Rect localPosition
{
[VisibleToOtherModules("UnityEngine.UIElementsModule")]
get { return position; }
}
public int cursorIndex
{
get { return m_CursorIndex; }
set
{
int oldCursorIndex = m_CursorIndex;
m_CursorIndex = value;
EnsureValidCodePointIndex(ref m_CursorIndex);
if (m_CursorIndex != oldCursorIndex)
{
m_RevealCursor = true;
OnCursorIndexChange();
}
}
}
public int selectIndex
{
get { return m_SelectIndex; }
set
{
int oldSelectIndex = m_SelectIndex;
m_SelectIndex = value;
EnsureValidCodePointIndex(ref m_SelectIndex);
if (m_SelectIndex != oldSelectIndex)
OnSelectIndexChange();
}
}
// are we up/downing?
public Vector2 graphicalCursorPos;
public Vector2 graphicalSelectCursorPos;
// Clear the cursor position for vertical movement...
void ClearCursorPos() {hasHorizontalCursorPos = false; m_iAltCursorPos = -1; }
// selection
bool m_MouseDragSelectsWholeWords = false;
int m_DblClickInitPos = 0;
DblClickSnapping m_DblClickSnap = DblClickSnapping.WORDS;
public DblClickSnapping doubleClickSnapping { get { return m_DblClickSnap; } set { m_DblClickSnap = value; } }
bool m_bJustSelected = false;
int m_iAltCursorPos = -1;
public int altCursorPosition { get { return m_iAltCursorPos; } set { m_iAltCursorPos = value; } }
public enum DblClickSnapping : byte { WORDS, PARAGRAPHS };
[RequiredByNativeCode]
public TextEditor()
{
}
public void OnFocus()
{
if (multiline)
cursorIndex = selectIndex = 0;
else
SelectAll();
m_HasFocus = true;
}
public void OnLostFocus()
{
m_HasFocus = false;
scrollOffset = Vector2.zero;
}
void GrabGraphicalCursorPos()
{
if (!hasHorizontalCursorPos)
{
graphicalCursorPos = style.GetCursorPixelPosition(localPosition, m_Content, cursorIndex);
graphicalSelectCursorPos = style.GetCursorPixelPosition(localPosition, m_Content, selectIndex);
hasHorizontalCursorPos = false;
}
}
// Handle a key event.
// Looks up the platform-dependent key-action table & performs the event
// return true if the event was recognized.
public bool HandleKeyEvent(Event e)
{
InitKeyActions();
EventModifiers m = e.modifiers;
e.modifiers &= ~EventModifiers.CapsLock;
if (s_Keyactions.ContainsKey(e))
{
TextEditOp op = (TextEditOp)s_Keyactions[e];
PerformOperation(op);
e.modifiers = m;
return true;
}
e.modifiers = m;
return false;
}
// Deletes previous text on the line
public bool DeleteLineBack()
{
if (hasSelection)
{
DeleteSelection();
return true;
}
int p = cursorIndex;
int i = p;
while (i-- != 0)
if (text[i] == '\n')
{
p = i + 1;
break;
}
if (i == -1)
p = 0;
if (cursorIndex != p)
{
m_Content.text = text.Remove(p, cursorIndex - p);
selectIndex = cursorIndex = p;
return true;
}
return false;
}
// Deletes the previous word
public bool DeleteWordBack()
{
if (hasSelection)
{
DeleteSelection();
return true;
}
int prevWordEnd = FindEndOfPreviousWord(cursorIndex);
if (cursorIndex != prevWordEnd)
{
m_Content.text = text.Remove(prevWordEnd, cursorIndex - prevWordEnd);
selectIndex = cursorIndex = prevWordEnd;
return true;
}
return false;
}
// Deletes the following word
public bool DeleteWordForward()
{
if (hasSelection)
{
DeleteSelection();
return true;
}
int nextWordStart = FindStartOfNextWord(cursorIndex);
if (cursorIndex < text.Length)
{
m_Content.text = text.Remove(cursorIndex, nextWordStart - cursorIndex);
return true;
}
return false;
}
// perform a right-delete
public bool Delete()
{
if (hasSelection)
{
DeleteSelection();
return true;
}
else if (cursorIndex < text.Length)
{
m_Content.text = text.Remove(cursorIndex, NextCodePointIndex(cursorIndex) - cursorIndex);
return true;
}
return false;
}
public bool CanPaste()
{
return GUIUtility.systemCopyBuffer.Length != 0;
}
// Perform a left-delete
public bool Backspace()
{
if (hasSelection)
{
DeleteSelection();
return true;
}
else if (cursorIndex > 0)
{
var startIndex = PreviousCodePointIndex(cursorIndex);
m_Content.text = text.Remove(startIndex, cursorIndex - startIndex);
selectIndex = cursorIndex = startIndex;
ClearCursorPos();
return true;
}
return false;
}
/// Select all the text
public void SelectAll()
{
cursorIndex = 0; selectIndex = text.Length;
ClearCursorPos();
}
/// Select none of the text
public void SelectNone()
{
selectIndex = cursorIndex;
ClearCursorPos();
}
/// Does this text field has a selection
public bool hasSelection { get { return cursorIndex != selectIndex; } }
/// Returns the selected text
public string SelectedText
{
get
{
if (cursorIndex == selectIndex)
return "";
if (cursorIndex < selectIndex)
return text.Substring(cursorIndex, selectIndex - cursorIndex);
else
return text.Substring(selectIndex, cursorIndex - selectIndex);
}
}
/// Delete the current selection. If there is no selection, this function does not do anything...
public bool DeleteSelection()
{
if (cursorIndex == selectIndex)
return false;
if (cursorIndex < selectIndex)
{
m_Content.text = text.Substring(0, cursorIndex) + text.Substring(selectIndex, text.Length - selectIndex);
selectIndex = cursorIndex;
}
else
{
m_Content.text = text.Substring(0, selectIndex) + text.Substring(cursorIndex, text.Length - cursorIndex);
cursorIndex = selectIndex;
}
ClearCursorPos();
return true;
}
/// Replace the selection with /replace/. If there is no selection, /replace/ is inserted at the current cursor point.
public void ReplaceSelection(string replace)
{
DeleteSelection();
m_Content.text = text.Insert(cursorIndex, replace);
selectIndex = cursorIndex += replace.Length;
ClearCursorPos();
}
/// Replacted the selection with /c/
public void Insert(char c)
{
ReplaceSelection(c.ToString());
}
/// Move selection to alt cursor /position/
public void MoveSelectionToAltCursor()
{
if (m_iAltCursorPos == -1)
return;
int p = m_iAltCursorPos;
string tmp = SelectedText;
m_Content.text = text.Insert(p, tmp);
if (p < cursorIndex)
{
cursorIndex += tmp.Length;
selectIndex += tmp.Length;
}
DeleteSelection();
selectIndex = cursorIndex = p;
ClearCursorPos();
}
/// Move the cursor one character to the right and deselect.
public void MoveRight()
{
ClearCursorPos();
if (selectIndex == cursorIndex)
{
cursorIndex = NextCodePointIndex(cursorIndex);
DetectFocusChange(); // TODO: Is this necessary?
selectIndex = cursorIndex;
}
else
{
if (selectIndex > cursorIndex)
cursorIndex = selectIndex;
else
selectIndex = cursorIndex;
}
}
/// Move the cursor one character to the left and deselect.
public void MoveLeft()
{
if (selectIndex == cursorIndex)
{
cursorIndex = PreviousCodePointIndex(cursorIndex);
selectIndex = cursorIndex;
}
else
{
if (selectIndex > cursorIndex)
selectIndex = cursorIndex;
else
cursorIndex = selectIndex;
}
ClearCursorPos();
}
/// Move the cursor up and deselects.
public void MoveUp()
{
if (selectIndex < cursorIndex)
selectIndex = cursorIndex;
else
cursorIndex = selectIndex;
GrabGraphicalCursorPos();
graphicalCursorPos.y -= 1;
cursorIndex = selectIndex = style.GetCursorStringIndex(localPosition, m_Content, graphicalCursorPos);
if (cursorIndex <= 0)
ClearCursorPos();
}
/// Move the cursor down and deselects.
public void MoveDown()
{
if (selectIndex > cursorIndex)
selectIndex = cursorIndex;
else
cursorIndex = selectIndex;
GrabGraphicalCursorPos();
graphicalCursorPos.y += style.lineHeight + 5;
cursorIndex = selectIndex = style.GetCursorStringIndex(localPosition, m_Content, graphicalCursorPos);
if (cursorIndex == text.Length)
ClearCursorPos();
}
/// Moves the cursor to the start of the current line.
public void MoveLineStart()
{
// we start from the left-most selected character
int p = selectIndex < cursorIndex ? selectIndex : cursorIndex;
// then we scan back to find the first newline
int i = p;
while (i-- != 0)
if (text[i] == '\n')
{
selectIndex = cursorIndex = i + 1;
return;
}
selectIndex = cursorIndex = 0;
}
/// Moves the selection to the end of the current line
public void MoveLineEnd()
{
// we start from the right-most selected character
int p = selectIndex > cursorIndex ? selectIndex : cursorIndex;
// then we scan forward to find the first newline
int i = p;
int strlen = text.Length;
while (i < strlen)
{
if (text[i] == '\n')
{
selectIndex = cursorIndex = i;
return;
}
i++;
}
selectIndex = cursorIndex = strlen;
}
/// Move to the start of the current graphical line. This takes word-wrapping into consideration.
public void MoveGraphicalLineStart()
{
cursorIndex = selectIndex = GetGraphicalLineStart(cursorIndex < selectIndex ? cursorIndex : selectIndex);
}
/// Move to the end of the current graphical line. This takes word-wrapping into consideration.
public void MoveGraphicalLineEnd()
{
cursorIndex = selectIndex = GetGraphicalLineEnd(cursorIndex > selectIndex ? cursorIndex : selectIndex);
}
/// Moves the cursor to the beginning of the text
public void MoveTextStart()
{
selectIndex = cursorIndex = 0;
}
/// Moves the cursor to the end of the text
public void MoveTextEnd()
{
selectIndex = cursorIndex = text.Length;
}
private int IndexOfEndOfLine(int startIndex)
{
int index = text.IndexOf('\n', startIndex);
return (index != -1 ? index : text.Length);
}
/// Move to the next paragraph
public void MoveParagraphForward()
{
cursorIndex = cursorIndex > selectIndex ? cursorIndex : selectIndex;
if (cursorIndex < text.Length)
{
selectIndex = cursorIndex = IndexOfEndOfLine(cursorIndex + 1);
}
}
/// Move to the previous paragraph
public void MoveParagraphBackward()
{
cursorIndex = cursorIndex < selectIndex ? cursorIndex : selectIndex;
if (cursorIndex > 1)
{
selectIndex = cursorIndex = text.LastIndexOf('\n', cursorIndex - 2) + 1;
}
else
selectIndex = cursorIndex = 0;
}
//
// Move the cursor to a graphical position. Used for moving the cursor on MouseDown events.
public void MoveCursorToPosition(Vector2 cursorPosition)
{
MoveCursorToPosition_Internal(cursorPosition, Event.current.shift);
}
// Move the cursor to a graphical position. Used for moving the cursor on MouseDown events.
protected internal void MoveCursorToPosition_Internal(Vector2 cursorPosition, bool shift)
{
selectIndex = style.GetCursorStringIndex(localPosition, m_Content, cursorPosition + scrollOffset);
if (!shift)
{
cursorIndex = selectIndex;
}
DetectFocusChange(); // TODO: Is this necessary?
}
public void MoveAltCursorToPosition(Vector2 cursorPosition)
{
int index = style.GetCursorStringIndex(localPosition, m_Content, cursorPosition + scrollOffset);
m_iAltCursorPos = Mathf.Min(text.Length, index);
DetectFocusChange(); // TODO: Is this necessary?
}
public bool IsOverSelection(Vector2 cursorPosition)
{
int p = style.GetCursorStringIndex(localPosition, m_Content, cursorPosition + scrollOffset);
return ((p < Mathf.Max(cursorIndex, selectIndex)) && (p > Mathf.Min(cursorIndex, selectIndex)));
}
// Do a drag selection. Used to expand the selection in MouseDrag events.
public void SelectToPosition(Vector2 cursorPosition)
{
if (!m_MouseDragSelectsWholeWords)
cursorIndex = style.GetCursorStringIndex(localPosition, m_Content, cursorPosition + scrollOffset);
else // snap to words/paragraphs
{
int p = style.GetCursorStringIndex(localPosition, m_Content, cursorPosition + scrollOffset);
EnsureValidCodePointIndex(ref p);
EnsureValidCodePointIndex(ref m_DblClickInitPos);
if (m_DblClickSnap == DblClickSnapping.WORDS)
{
if (p < m_DblClickInitPos)
{
cursorIndex = FindEndOfClassification(p, Direction.Backward);
selectIndex = FindEndOfClassification(m_DblClickInitPos, Direction.Forward);
}
else
{
cursorIndex = FindEndOfClassification(p, Direction.Forward);
selectIndex = FindEndOfClassification(m_DblClickInitPos, Direction.Backward);
}
} // paragraph
else
{
if (p < m_DblClickInitPos)
{
if (p > 0)
cursorIndex = text.LastIndexOf('\n', Mathf.Max(0, p - 2)) + 1;
else
cursorIndex = 0;
selectIndex = text.LastIndexOf('\n', m_DblClickInitPos);
}
else
{
if (p < text.Length)
{
cursorIndex = IndexOfEndOfLine(p);
}
else
cursorIndex = text.Length;
selectIndex = text.LastIndexOf('\n', Mathf.Max(0, m_DblClickInitPos - 2)) + 1;
}
}
}
}
/// Expand the selection to the left
public void SelectLeft()
{
if (m_bJustSelected)
if (cursorIndex > selectIndex)
{ // swap
int tmp = cursorIndex;
cursorIndex = selectIndex;
selectIndex = tmp;
}
m_bJustSelected = false;
cursorIndex = PreviousCodePointIndex(cursorIndex);
}
public void SelectRight()
{
if (m_bJustSelected)
if (cursorIndex < selectIndex)
{ // swap
int tmp = cursorIndex;
cursorIndex = selectIndex;
selectIndex = tmp;
}
m_bJustSelected = false;
cursorIndex = NextCodePointIndex(cursorIndex);
}
public void SelectUp()
{
GrabGraphicalCursorPos();
graphicalCursorPos.y -= 1;
cursorIndex = style.GetCursorStringIndex(localPosition, m_Content, graphicalCursorPos);
}
public void SelectDown()
{
GrabGraphicalCursorPos();
graphicalCursorPos.y += style.lineHeight + 5;
cursorIndex = style.GetCursorStringIndex(localPosition, m_Content, graphicalCursorPos);
}
/// Select to the end of the text
public void SelectTextEnd()
{
// This is not quite like the mac - there, when you select to end of text, the position of the cursor becomes somewhat i'll defined
// Hard to explain. In textedit, try: CMD-SHIFT-down, SHIFT-LEFT for case 1. then do CMD-SHIFT-down, SHIFT-RIGHT, SHIFT-LEFT for case 2.
// Anyways, it's wrong so we won't do that
cursorIndex = text.Length;
}
/// Select to the start of the text
public void SelectTextStart()
{
// Same thing as SelectTextEnd...
cursorIndex = 0;
}
/// sets whether the text selection is done by dbl click or not
public void MouseDragSelectsWholeWords(bool on)
{
m_MouseDragSelectsWholeWords = on;
m_DblClickInitPos = cursorIndex;
}
public void DblClickSnap(DblClickSnapping snapping)
{
m_DblClickSnap = snapping;
}
int GetGraphicalLineStart(int p)
{
Vector2 point = style.GetCursorPixelPosition(localPosition, m_Content, p);
point.x = 0;
return style.GetCursorStringIndex(localPosition, m_Content, point);
}
int GetGraphicalLineEnd(int p)
{
Vector2 point = style.GetCursorPixelPosition(localPosition, m_Content, p);
point.x += 5000;
return style.GetCursorStringIndex(localPosition, m_Content, point);
}
int FindNextSeperator(int startPos)
{
int textLen = text.Length;
while (startPos < textLen && ClassifyChar(startPos) != CharacterType.LetterLike)
startPos = NextCodePointIndex(startPos);
while (startPos < textLen && ClassifyChar(startPos) == CharacterType.LetterLike)
startPos = NextCodePointIndex(startPos);
return startPos;
}
int FindPrevSeperator(int startPos)
{
startPos = PreviousCodePointIndex(startPos);
while (startPos > 0 && ClassifyChar(startPos) != CharacterType.LetterLike)
startPos = PreviousCodePointIndex(startPos);
if (startPos == 0)
return 0;
while (startPos > 0 && ClassifyChar(startPos) == CharacterType.LetterLike)
startPos = PreviousCodePointIndex(startPos);
if (ClassifyChar(startPos) == CharacterType.LetterLike)
return startPos;
return NextCodePointIndex(startPos);
}
/// Move to the end of the word.
/// If the cursor is over some space characters, these are skipped
/// Then, the cursor moves to the end of the following word.
/// This corresponds to Alt-RightArrow on a Mac
public void MoveWordRight()
{
cursorIndex = cursorIndex > selectIndex ? cursorIndex : selectIndex;
cursorIndex = selectIndex = FindNextSeperator(cursorIndex);
ClearCursorPos();
}
public void MoveToStartOfNextWord()
{
ClearCursorPos();
if (cursorIndex != selectIndex)
{
MoveRight();
return;
}
cursorIndex = selectIndex = FindStartOfNextWord(cursorIndex);
}
public void MoveToEndOfPreviousWord()
{
ClearCursorPos();
if (cursorIndex != selectIndex)
{
MoveLeft();
return;
}
cursorIndex = selectIndex = FindEndOfPreviousWord(cursorIndex);
}
public void SelectToStartOfNextWord()
{
ClearCursorPos();
cursorIndex = FindStartOfNextWord(cursorIndex);
}
public void SelectToEndOfPreviousWord()
{
ClearCursorPos();
cursorIndex = FindEndOfPreviousWord(cursorIndex);
}
enum CharacterType
{
LetterLike,
Symbol, Symbol2,
WhiteSpace
}
CharacterType ClassifyChar(int index)
{
if (char.IsWhiteSpace(text, index))
return CharacterType.WhiteSpace;
if (char.IsLetterOrDigit(text, index) || text[index] == '\'')
return CharacterType.LetterLike;
return CharacterType.Symbol;
}
/// Move to start of next word.
/// This corresponds to Ctrl-RightArrow on Windows
/// If the cursor is over a whitespace, it's moved forwards ''till the first non-whitespace character
/// If the cursor is over an alphanumeric character, it''s moved forward 'till it encounters space or a punctuation mark.
/// If the stopping character is a space, this is skipped as well.
/// If the cursor is over an punctuation mark, it's moved forward ''till it a letter or a space of a punctuation mark. If the stopping character is a space, this is skipped as well
public int FindStartOfNextWord(int p)
{
int textLen = text.Length;
if (p == textLen)
return p;
// Find out which char type we're at...
CharacterType t = ClassifyChar(p);
if (t != CharacterType.WhiteSpace)
{
p = NextCodePointIndex(p);
while (p < textLen && ClassifyChar(p) == t)
p = NextCodePointIndex(p);
}
else
{
if (text[p] == '\t' || text[p] == '\n')
return NextCodePointIndex(p);
}
if (p == textLen)
return p;
// Skip spaces
if (text[p] == ' ') // If we're at a space, skip over any number of spaces
{
while (p < textLen && ClassifyChar(p) == CharacterType.WhiteSpace)
p = NextCodePointIndex(p);
}
else if (text[p] == '\t' || text[p] == '\n') // If we're at a tab or a newline, just step one char ahead
{
return p;
}
return p;
}
int FindEndOfPreviousWord(int p)
{
if (p == 0)
return p;
p = PreviousCodePointIndex(p);
// Skip spaces
while (p > 0 && text[p] == ' ')
p = PreviousCodePointIndex(p);
CharacterType t = ClassifyChar(p);
if (t != CharacterType.WhiteSpace)
{
while (p > 0 && ClassifyChar(PreviousCodePointIndex(p)) == t)
p = PreviousCodePointIndex(p);
}
return p;
}
public void MoveWordLeft()
{
cursorIndex = cursorIndex < selectIndex ? cursorIndex : selectIndex;
cursorIndex = FindPrevSeperator(cursorIndex);
selectIndex = cursorIndex;
}
public void SelectWordRight()
{
ClearCursorPos();
int cachedPos = selectIndex;
if (cursorIndex < selectIndex)
{
selectIndex = cursorIndex;
MoveWordRight();
selectIndex = cachedPos;
cursorIndex = cursorIndex < selectIndex ? cursorIndex : selectIndex;
return;
}
selectIndex = cursorIndex;
MoveWordRight();
selectIndex = cachedPos;
}
public void SelectWordLeft()
{
ClearCursorPos();
int cachedPos = selectIndex;
if (cursorIndex > selectIndex)
{
selectIndex = cursorIndex;
MoveWordLeft();
selectIndex = cachedPos;
cursorIndex = cursorIndex > selectIndex ? cursorIndex : selectIndex;
return;
}
selectIndex = cursorIndex;
MoveWordLeft();
selectIndex = cachedPos;
}
/// Expand the selection to the start of the line
/// Used on a mac for CMD-SHIFT-LEFT
public void ExpandSelectGraphicalLineStart()
{
ClearCursorPos();
if (cursorIndex < selectIndex)
cursorIndex = GetGraphicalLineStart(cursorIndex);
else
{
int temp = cursorIndex;
cursorIndex = GetGraphicalLineStart(selectIndex);
selectIndex = temp;
}
}
/// Expand the selection to the end of the line
/// Used on a mac for CMD-SHIFT-RIGHT
public void ExpandSelectGraphicalLineEnd()
{
ClearCursorPos();
if (cursorIndex > selectIndex)
cursorIndex = GetGraphicalLineEnd(cursorIndex);
else
{
int temp = cursorIndex;
cursorIndex = GetGraphicalLineEnd(selectIndex);
selectIndex = temp;
}
}
/// Move the selection point to the start of the line
/// Used on a Windows for SHIFT-Home
public void SelectGraphicalLineStart()
{
ClearCursorPos();
cursorIndex = GetGraphicalLineStart(cursorIndex);
}
/// Expand the selection to the end of the line
/// Used on a mac for SHIFT-End
public void SelectGraphicalLineEnd()
{
ClearCursorPos();
cursorIndex = GetGraphicalLineEnd(cursorIndex);
}
public void SelectParagraphForward()
{
ClearCursorPos();
bool wasBehind = cursorIndex < selectIndex;
if (cursorIndex < text.Length)
{
cursorIndex = IndexOfEndOfLine(cursorIndex + 1);
if (wasBehind && cursorIndex > selectIndex)
cursorIndex = selectIndex;
}
}
public void SelectParagraphBackward()
{
ClearCursorPos();
bool wasInFront = cursorIndex > selectIndex;
if (cursorIndex > 1)
{
cursorIndex = text.LastIndexOf('\n', cursorIndex - 2) + 1;
if (wasInFront && cursorIndex < selectIndex)
cursorIndex = selectIndex;
}
else
selectIndex = cursorIndex = 0;
}
/// Select the word under the cursor
public void SelectCurrentWord()
{
var index = cursorIndex;
if (cursorIndex < selectIndex)
{
cursorIndex = FindEndOfClassification(index, Direction.Backward);
selectIndex = FindEndOfClassification(index, Direction.Forward);
}
else
{
cursorIndex = FindEndOfClassification(index, Direction.Forward);
selectIndex = FindEndOfClassification(index, Direction.Backward);
}
ClearCursorPos();
m_bJustSelected = true;
}
enum Direction
{
Forward,
Backward,
}
int FindEndOfClassification(int p, Direction dir)
{
if (text.Length == 0)
return 0;
if (p == text.Length)
p = PreviousCodePointIndex(p);
var t = ClassifyChar(p);
do
{
switch (dir)
{
case Direction.Backward:
p = PreviousCodePointIndex(p);
if (p == 0)
return ClassifyChar(0) == t ? 0 : NextCodePointIndex(0);
break;
case Direction.Forward:
p = NextCodePointIndex(p);
if (p == text.Length)
return text.Length;
break;
}
}
while (ClassifyChar(p) == t);
if (dir == Direction.Forward)
return p;
return NextCodePointIndex(p);
}
// Select the entire paragraph the cursor is on (separated by \n)
You can’t perform that action at this time.