-// Copyright (c) 2013-2019 Bruyère Jean-Philippe jp_bruyere@hotmail.com
+// Copyright (c) 2013-2021 Bruyère Jean-Philippe jp_bruyere@hotmail.com
//
// This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
using System;
-using System.Collections.Generic;
using System.Linq;
using Crow.Cairo;
-using System.Text.RegularExpressions;
using System.ComponentModel;
-using System.Text;
-using System.Diagnostics;
using Glfw;
-using System.Collections;
using Crow.Text;
-namespace Crow {
- /// <summary>
- /// Simple label widget possibly multiline but without tabulation handling.
- /// </summary>
- public class Label : Widget
+namespace Crow
+{
+ /// <summary>
+ /// Simple label widget possibly multiline but without tabulation handling.
+ /// </summary>
+ public class Label : Widget
{
#region CTOR
protected Label () {}
#region private and protected fields
protected string _text;
TextAlignment _textAlignment;
- bool horizontalStretch;
- bool verticalStretch;
- bool _selectable;
bool _multiline;
Color selBackground;
Color selForeground;
+ int targetColumn = -1;//handle line changes with long->short->long line length sequence.
//Point mouseLocalPos = -1;//mouse coord in widget space, filled only when clicked
-
+
protected CharLocation? hoverLoc = null;
protected CharLocation? currentLoc = null;
- protected CharLocation? selectionStart = null; //selection start (row,column)
+ protected CharLocation? selectionStart = null; //selection start (row,column)
+
+ protected LineCollection lines;
+ protected bool textMeasureIsUpToDate = false;
+ protected object linesMutex = new object ();
+ protected string LineBreak = null;
+ protected Size cachedTextSize = default (Size);
+ protected bool mixedLineBreak = false;
protected FontExtents fe;
protected TextExtents te;
return;
int oldTextLength = string.IsNullOrEmpty (_text) ? 0 : _text.Length;
- _text = value;
-
- getLines ();
-
- textMeasureIsUpToDate = false;
+ lock (linesMutex) {
+ _text = value;
+ getLines ();
+ textMeasureIsUpToDate = false;
+ }
NotifyValueChanged ("Text", Text);
OnTextChanged (this, new TextChangeEventArgs (new TextChange (0, oldTextLength, _text)));
RegisterForGraphicUpdate ();
RegisterForGraphicUpdate();
}
}
- /*[DefaultValue(0)]
- public int CurrentColumn{
- get { return _currentCol; }
- set {
- if (value == _currentCol)
- return;
- if (value < 0)
- _currentCol = 0;
- else if (value > lines [_currentLine].Length)
- _currentCol = lines [_currentLine].Length;
- else
- _currentCol = value;
- NotifyValueChangedAuto (_currentCol);
-
- Rectangle cb = ClientRectangle;
-
- if (Width == Measure.Fit || cb.Width >= cachedTextSize.Width) {
- xTranslation = 0;
- return;
- }
- int xpos = xposition;
- if (xTranslation + xpos > cb.Width)
- xTranslation = cb.Width - xpos;
- else if (xpos < -xTranslation)
- xTranslation = -xpos;
- RegisterForRedraw ();
- }
- }
- int xTranslation = 0;
- int xposition {
- get {
- using (Context gr = new Context (IFace.surf)) {
- //Cairo.FontFace cf = gr.GetContextFontFace ();
- gr.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
- gr.SetFontSize (Font.Size);
- gr.FontOptions = Interface.FontRenderingOptions;
- gr.Antialias = Interface.Antialias;
- try {
- return (int)Math.Ceiling (gr.TextExtents (_text.GetLine (lines[_currentLine], _currentCol), Interface.TAB_SIZE).XAdvance);
- } catch {
- System.Diagnostics.Debug.WriteLine ("xpos measuring fault in label");
- return 0;
- }
- }
- }
- }
-
- [DefaultValue(0)]
- public int CurrentLine{
- get { return _currentLine; }
- set {
- if (value == _currentLine)
- return;
- if (value >= lines.Length)
- _currentLine = lines.Length-1;
- else if (value < 0)
- _currentLine = 0;
- else
- _currentLine = value;
- //force recheck of currentCol for bounding
- int cc = _currentCol;
- _currentCol = 0;
- CurrentColumn = cc;
- NotifyValueChangedAuto (_currentLine);
- }
- }
- [XmlIgnore]public Point CurrentPosition {
- get { return new Point(_currentCol, CurrentLine); }
- }
- //TODO:using HasFocus for drawing selection cause SelBegin and Release binding not to work
- /// <summary>
- /// Selection begin position in char units
- /// </summary>
- [DefaultValue("-1")]
- public Point SelBegin {
- get {
- return _selBegin;
- }
- set {
- if (value == _selBegin)
- return;
- _selBegin = value;
- NotifyValueChangedAuto (_selBegin);
- NotifyValueChanged ("SelectedText", SelectedText);
- }
- }
- [DefaultValue("-1")]
- public Point SelRelease {
- get {
- return _selRelease;
- }
- set {
- if (value == _selRelease)
- return;
- _selRelease = value;
- NotifyValueChangedAuto (_selRelease);
- NotifyValueChanged ("SelectedText", SelectedText);
- }
- }
- /// <summary>
- /// return char at CurrentLine, CurrentColumn
- /// </summary>
- [XmlIgnore]protected Char CurrentChar => _text[lines[CurrentLine].Start + CurrentColumn];
- /// <summary>
- /// ordered selection start and end positions in char units
- /// </summary>
- [XmlIgnore]protected Point selectionStart
- {
- get {
- return SelRelease < 0 || SelBegin.Y < SelRelease.Y ? SelBegin :
- SelBegin.Y > SelRelease.Y ? SelRelease :
- SelBegin.X < SelRelease.X ? SelBegin : SelRelease;
- }
- }
- [XmlIgnore]public Point selectionEnd
- {
- get {
- return SelRelease < 0 || SelBegin.Y > SelRelease.Y ? SelBegin :
- SelBegin.Y < SelRelease.Y ? SelRelease :
- SelBegin.X > SelRelease.X ? SelBegin : SelRelease;
- }
- }
- [XmlIgnore]public string SelectedText
- {
- get {
- if (SelRelease < 0 || SelBegin < 0)
- return "";
- if (selectionStart.Y == selectionEnd.Y)
- return _text.Substring (lines[selectionStart.Y].Start + selectionStart.X, selectionEnd.X - selectionStart.X);
-
- StringBuilder tmp = new StringBuilder (_text.GetLineIncludingLineBreak (lines[selectionStart.Y], selectionStart.X).ToString ());
- for (int l = selectionStart.Y + 1; l < selectionEnd.Y; l++)
- tmp.Append (_text.GetLineIncludingLineBreak (lines[l]).ToString ());
- tmp.Append (_text.Substring (lines[selectionEnd.Y].Start, selectionEnd.X));
- return tmp.ToString ();
- }
- }
- [XmlIgnore]public bool selectionIsEmpty
- { get { return SelRelease < 0; } }
+
/// <summary>
/// Moves cursor one char to the left.
/// </summary>
- /// <returns><c>true</c> if move succeed</returns>
- */
+ /// <returns><c>true</c> if move succeed</returns>
public bool MoveLeft(){
targetColumn = -1;
CharLocation loc = currentLoc.Value;
} else
currentLoc = new CharLocation (loc.Line, loc.Column + 1);
return true;
- }
- int targetColumn = -1;
+ }
public bool MoveUp () {
CharLocation loc = currentLoc.Value;
if (loc.Line == 0)
return true;
}
-
- /*
+/*
public void GotoWordStart(){
CurrentColumn--;
//skip white spaces
if (char.IsLetterOrDigit (this.CurrentChar))
CurrentColumn++;
}
- public void DeleteChar()
- {
- if (selectionIsEmpty) {
- if (CurrentColumn == 0) {
- if (CurrentLine == 0 && lines.Length == 1)
- return;
- CurrentLine--;
- CurrentColumn = lines [CurrentLine].Length;
-
- Text = _text.Remove (lines[CurrentLine].End, lines[CurrentLine].LineBreakLength);
- return;
- }
- CurrentColumn--;
- Text = _text.Remove (lines[CurrentLine].Start + CurrentColumn, 1);
- } else {
- int linesToRemove = selectionEnd.Y - selectionStart.Y + 1;
- int l = selectionStart.Y;
-
- if (linesToRemove > 0) {
- lines [l] = lines [l].Remove (selectionStart.X, lines [l].Length - selectionStart.X) +
- lines [selectionEnd.Y].Substring (selectionEnd.X, lines [selectionEnd.Y].Length - selectionEnd.X);
- l++;
- for (int c = 0; c < linesToRemove-1; c++)
- lines.RemoveAt (l);
- CurrentLine = selectionStart.Y;
- CurrentColumn = selectionStart.X;
- } else
- lines [l] = lines [l].Remove (selectionStart.X, selectionEnd.X - selectionStart.X);
- CurrentColumn = selectionStart.X;
- SelBegin = -1;
- SelRelease = -1;
- }
- //OnTextChanged (this, new TextChangeEventArgs (Text));
- }
- /// <summary>
- /// Insert new string at caret position, should be sure no line break is inside.
- /// </summary>
- /// <param name="str">String.</param>
- protected void Insert(string str)
- {
- if (!selectionIsEmpty)
- this.DeleteChar ();
- if (_multiline) {
- string[] strLines = Regex.Split (str, "\r\n|\r|\n|" + @"\\n").ToArray();
- lines [CurrentLine] = lines [CurrentLine].Insert (CurrentColumn, strLines[0]);
- CurrentColumn += strLines[0].Length;
- for (int i = 1; i < strLines.Length; i++) {
- InsertLineBreak ();
- lines [CurrentLine] = lines [CurrentLine].Insert (CurrentColumn, strLines[i]);
- CurrentColumn += strLines[i].Length;
- }
- } else {
- ReadOnlySpan<char> a = _text.AsSpan ().Slice (0 ,lines[CurrentLine].Start + CurrentColumn);
- ReadOnlySpan<char> b = _text.AsSpan ().Slice (lines[CurrentLine].Start + CurrentColumn);
-
- _text = string.Concat( (a, str.AsSpan(), b);
-
- lines [CurrentLine] = lines [CurrentLine].Insert (CurrentColumn, str);
- CurrentColumn += str.Length;
- }
- OnTextChanged (this, new TextChangeEventArgs (Text));
- }
- /// <summary>
- /// Insert a line break.
- /// </summary>
- protected void InsertLineBreak()
- {
- lines.Insert(CurrentLine + 1, lines[CurrentLine].Substring(CurrentColumn));
- lines [CurrentLine] = lines [CurrentLine].Substring (0, CurrentColumn);
- CurrentLine++;
- CurrentColumn = 0;
- OnTextChanged (this, new TextChangeEventArgs (Text));
- }
*/
- protected bool textMeasureIsUpToDate = false;
- Size cachedTextSize = default(Size);
- protected LineCollection lines;
- protected string LineBreak = null;
- bool mixedLineBreak = false;
protected void detectLineBreak () {
if (!_multiline)
}
}
}
-
- protected void getLines () {
-
+
+ protected void getLines () {
if (lines == null)
lines = new LineCollection (_multiline ? 4 : 1);
else
lines.Add (new TextLine (0, _text.Length, _text.Length));
return;
}
-
+
int start = 0, i = 0;
while (i < _text.Length) {
char c = _text[i];
if (start < i)
lines.Add (new TextLine (start, _text.Length, _text.Length));
else
- lines.Add (new TextLine (_text.Length, _text.Length, _text.Length));
+ lines.Add (new TextLine (_text.Length, _text.Length, _text.Length));
}
void resetLocationXs () {
if (currentLoc.HasValue) {
return new TextSpan (lines.GetAbsolutePosition (selStart), lines.GetAbsolutePosition (selEnd));
}
}
-
- #region GraphicObject overrides
- public override int measureRawSize(LayoutingType lt)
+ public override bool UpdateLayout (LayoutingType layoutType) {
+ if ((LayoutingType.Sizing | layoutType) != LayoutingType.None) {
+ if (!System.Threading.Monitor.TryEnter (linesMutex))
+ return false;
+ }
+ bool result = base.UpdateLayout (layoutType);
+ System.Threading.Monitor.Exit (linesMutex);
+ return result;
+ }
+ #region GraphicObject overrides
+ public override int measureRawSize(LayoutingType lt)
{
if ((bool)lines?.IsEmpty)
getLines ();
}
return Margin * 2 + (lt == LayoutingType.Height ? cachedTextSize.Height : cachedTextSize.Width);
}
-
- protected override void onDraw (Context gr)
+ protected override void onDraw (Context gr)
{
base.onDraw (gr);
gr.FontOptions = Interface.FontRenderingOptions;
gr.Antialias = Interface.Antialias;
- gr.Save ();
+ //gr.Save ();
Rectangle cb = ClientRectangle;
}
if (string.IsNullOrEmpty (_text)) {
- gr.Restore ();
+ //gr.Restore ();
return;
}
Foreground.SetAsSource (IFace, gr);
TextExtents extents;
- Span<byte> bytes = stackalloc byte[128];
+ Span<byte> bytes = stackalloc byte[128];
+ int y = cb.Y;
for (int i = 0; i < lines.Count; i++) {
int encodedBytes = -1;
Rectangle lineRect = new Rectangle (
Width.IsFit && !Multiline ? cb.X : (int)getX (cb.Width, lines[i]) + cb.X,
- cb.Y + i * lineHeight,
+ y,
lines[i].LengthInPixel,
lineHeight);
selRect.X = newX;
} else if (i == selEnd.Line) {
selRect.Width = (int)selEnd.VisualCharXPosition - selRect.X;
- } else
+ } else
selRect.Width += 10;
- } else
+ } else {
+ y += lineHeight;
continue;
+ }
} else {
selRect.X = (int)selStart.VisualCharXPosition + cb.X;
selRect.Width = (int)(selEnd.VisualCharXPosition - selStart.VisualCharXPosition);
}
Foreground.SetAsSource (IFace, gr);
}
+ y += lineHeight;
}
- gr.Restore ();
+ //gr.Restore ();
}
#endregion
base.onUnfocused (sender, e);
RegisterForRedraw ();
}
- public override void onMouseMove (object sender, MouseMoveEventArgs e)
+ public override void onMouseEnter (object sender, MouseMoveEventArgs e) {
+ base.onMouseEnter (sender, e);
+ if (Focusable)
+ IFace.MouseCursor = MouseCursor.ibeam;
+ }
+ public override void onMouseMove (object sender, MouseMoveEventArgs e)
{
base.onMouseMove (sender, e);
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