using System.Runtime.CompilerServices;
using Glfw;
using System.Diagnostics;
+using Crow.Text;
+using System.Collections.Generic;
+using Encoding = System.Text.Encoding;
namespace ShowCase
{
NotifyValueChanged (CurrentDir);
}
}
-
- string source, origSource;
public string CurrentFile {
get { return Configuration.Global.Get<string> (nameof (CurrentFile)); }
set {
}
}
+ public Command CMDNew, CMDOpen, CMDSave, CMDSaveAs, CMDQuit, CMDShowLeftPane,
+ CMDUndo, CMDRedo, CMDCut, CMDCopy, CMDPaste, CMDHelp, CMDAbout, CMDOptions;
+
+ const string _defaultFileName = "unnamed.txt";
+ string source = "";
+ int dirtyUndoLevel;
+ TextBox editor;
+ Stopwatch reloadChrono = Stopwatch.StartNew ();
+
+ public new bool IsDirty { get { return undoStack.Count != dirtyUndoLevel; } }
public string Source {
get => source;
set {
if (source == value)
return;
-
source = value;
- if (!reloadChrono.IsRunning)
- reloadChrono.Restart ();
-
- CMDSave.CanExecute = source != origSource;
+ if (!reloadChrono.IsRunning)
+ reloadChrono.Restart ();
NotifyValueChanged (source);
}
}
+ public CommandGroup EditorCommands => new CommandGroup (CMDUndo, CMDRedo, CMDCut, CMDCopy, CMDPaste, CMDSave, CMDSaveAs);
+ Stack<TextChange> undoStack = new Stack<TextChange> ();
+ Stack<TextChange> redoStack = new Stack<TextChange> ();
- public static Picture IcoNew = new SvgPicture ("#Icons.blank-file.svg");
- public static Picture IcoOpen = new SvgPicture ("#Icons.open.svg");
- public static Picture IcoSave = new SvgPicture ("#Icons.save.svg");
- public static Picture IcoSaveAs = new SvgPicture ("#Icons.save.svg");
- public static Picture IcoQuit = new SvgPicture ("#Icons.sign-out.svg");
- public static Picture IcoUndo = new SvgPicture ("#Icons.undo.svg");
- public static Picture IcoRedo = new SvgPicture ("#Icons.redo.svg");
-
- public static Picture IcoCut = new SvgPicture ("#Icons.scissors.svg");
- public static Picture IcoCopy = new SvgPicture ("#Icons.copy-file.svg");
- public static Picture IcoPaste = new SvgPicture ("#Icons.paste-on-document.svg");
-
- public Command CMDNew, CMDSave, CMDSaveAs, CMDUndo, CMDRedo, CMDCut, CMDCopy, CMDPaste;
- public CommandGroup ContextCommands => new CommandGroup (CMDNew, CMDSave, CMDSaveAs);
+ void undo () {
+ if (undoStack.TryPop (out TextChange tch)) {
+ redoStack.Push (tch.Inverse (source));
+ CMDRedo.CanExecute = true;
+ apply (tch);
+ editor.SetCursorPosition (tch.End + tch.ChangedText.Length);
+ }
+ if (undoStack.Count == 0)
+ CMDUndo.CanExecute = false;
+ }
+ void redo () {
+ if (redoStack.TryPop (out TextChange tch)) {
+ undoStack.Push (tch.Inverse (source));
+ CMDUndo.CanExecute = true;
+ apply (tch);
+ editor.SetCursorPosition (tch.End + tch.ChangedText.Length);
+ }
+ if (redoStack.Count == 0)
+ CMDRedo.CanExecute = false;
+ }
+ bool disableTextChangedEvent = false;
+ void apply (TextChange change) {
+ Span<char> tmp = stackalloc char[source.Length + (change.ChangedText.Length - change.Length)];
+ ReadOnlySpan<char> src = source.AsSpan ();
+ src.Slice (0, change.Start).CopyTo (tmp);
+ if (!string.IsNullOrEmpty (change.ChangedText))
+ change.ChangedText.AsSpan ().CopyTo (tmp.Slice (change.Start));
+ src.Slice (change.End).CopyTo (tmp.Slice (change.Start + change.ChangedText.Length));
+ disableTextChangedEvent = true;
+ Source = tmp.ToString ();
+ disableTextChangedEvent = false;
+ NotifyValueChanged ("IsDirty", IsDirty);
+ }
+
void initCommands ()
{
- CMDNew = new Command (new Action (onNewFile)) { Caption = "New", Icon = "#Icons.blank-file.svg", CanExecute = true };
+ CMDNew = new Command (new Action (onNewFile)) { Caption = "New", Icon = "#Icons.blank-file.svg", CanExecute = true };
CMDSave = new Command (new Action (onSave)) { Caption = "Save", Icon = "#Icons.save.svg", CanExecute = false };
CMDSaveAs = new Command (new Action (onSaveAs)) { Caption = "Save As...", Icon = "#Icons.save.svg", CanExecute = true };
- /*CMDUndo = new Command (new Action (undo)) { Caption = "Undo", Icon = IcoUndo, CanExecute = false };
- CMDRedo = new Command (new Action (redo)) { Caption = "Redo", Icon = IcoRedo, CanExecute = false };
- CMDCut = new Command (new Action (cut)) { Caption = "Cut", Icon = IcoCut, CanExecute = false };
- CMDCopy = new Command (new Action (copy)) { Caption = "Copy", Icon = IcoCopy, CanExecute = false };
- CMDPaste = new Command (new Action (paste)) { Caption = "Paste", Icon = IcoPaste, CanExecute = false };*/
- }
+ CMDQuit = new Command (new Action (() => base.Quit ())) { Caption = "Quit", Icon = "#Icons.exit.svg", CanExecute = true };
+ CMDUndo = new Command (new Action (undo)) { Caption = "Undo", Icon = "#Icons.undo.svg", CanExecute = false };
+ CMDRedo = new Command (new Action (redo)) { Caption = "Redo", Icon = "#Icons.redo.svg", CanExecute = false };
+ CMDCut = new Command (new Action (() => Quit ())) { Caption = "Cut", Icon = "#Icons.scissors.svg", CanExecute = false };
+ CMDCopy = new Command (new Action (() => Quit ())) { Caption = "Copy", Icon = "#Icons.copy-file.svg", CanExecute = false };
+ CMDPaste = new Command (new Action (() => Quit ())) { Caption = "Paste", Icon = "#Icons.paste-on-document.svg", CanExecute = false };
- public new bool IsDirty {
- get => !string.Equals(origSource, source);
+ }
+ void onNewFile () {
+ if (IsDirty) {
+ MessageBox mb = MessageBox.ShowModal (this, MessageBox.Type.YesNo, "Current file has unsaved changes, are you sure?");
+ mb.Yes += (sender, e) => newFile ();
+ } else
+ newFile ();
}
void onSave ()
{
save ();
}
- void onNewFile () {
- if (IsDirty) {
- MessageBox mb = MessageBox.ShowModal (this, MessageBox.Type.YesNo, "Current file has unsaved changes, are you sure?");
- mb.Yes += (sender, e) => newFile ();
- } else
- newFile ();
- }
void newFile()
{
- origSource = "";
- Source = "<Widget Background='DarkGrey'/>";
+ disableTextChangedEvent = true;
+ Source = @"<Label Text='Hello World' Background='MediumSeaGreen' Margin='10'/>";
+ disableTextChangedEvent = false;
+ resetUndoRedo ();
if (!string.IsNullOrEmpty (CurrentFile))
CurrentFile = Path.Combine (Path.GetDirectoryName (CurrentFile), "newfile.crow");
else
byte [] buff = Encoding.UTF8.GetBytes (source);
s.Write (buff, 0, buff.Length);
}
- origSource = source;
+ dirtyUndoLevel = undoStack.Count;
+ NotifyValueChanged ("IsDirty", IsDirty);
}
- protected override void OnInitialized ()
- {
- initCommands ();
-
- base.OnInitialized ();
-
- if (string.IsNullOrEmpty (CurrentDir))
- CurrentDir = Path.Combine (Directory.GetCurrentDirectory (), "Interfaces");
-
- Widget g = Load ("#ShowCase.showcase.crow");
- crowContainer = g.FindByName ("CrowContainer") as Container;
- g.DataSource = this;
-
- if (!File.Exists(CurrentFile))
- origSource = Source = @"<Label Text='Hello World' Background='MediumSeaGreen' Margin='10'/>";
-
- //I set an empty object as datasource at this level to force update when new
- //widgets are added to the interface
- crowContainer.DataSource = new object ();
+ void reloadFromFile () {
hideError ();
-
- reloadFromFile ();
+ disableTextChangedEvent = true;
+ if (File.Exists (CurrentFile)) {
+ using (Stream s = new FileStream (CurrentFile, FileMode.Open)) {
+ using (StreamReader sr = new StreamReader (s))
+ Source = sr.ReadToEnd ();
+ }
+ }
+ disableTextChangedEvent = false;
+ resetUndoRedo ();
+ }
+ void reloadFromSource () {
+ hideError ();
+ Widget g = null;
+ try {
+ lock (UpdateMutex) {
+ Instantiator inst = null;
+ using (MemoryStream ms = new MemoryStream (Encoding.UTF8.GetBytes (source)))
+ inst = new Instantiator (this, ms);
+ g = inst.CreateInstance ();
+ crowContainer.SetChild (g);
+ g.DataSource = this;
+ }
+ } catch (InstantiatorException itorex) {
+ //Console.WriteLine (itorex);
+ showError (itorex.InnerException);
+ } catch (Exception ex) {
+ //Console.WriteLine (ex);
+ showError (ex);
+ }
}
+ void resetUndoRedo () {
+ undoStack.Clear ();
+ redoStack.Clear ();
+ CMDUndo.CanExecute = false;
+ CMDRedo.CanExecute = false;
+ dirtyUndoLevel = 0;
+ }
+ void showError (Exception ex) {
+ NotifyValueChanged ("ErrorMessage", (object)ex.Message);
+ NotifyValueChanged ("ShowError", true);
+ }
+ void hideError () {
+ NotifyValueChanged ("ShowError", false);
+ }
public void goUpDirClick (object sender, MouseButtonEventArgs e)
{
CurrentFile = fi.FullName;
reloadFromFile ();
}
-
- void showError (Exception ex)
- {
- NotifyValueChanged ("ErrorMessage", (object)ex.Message);
- NotifyValueChanged ("ShowError", true);
- }
- void hideError ()
- {
- NotifyValueChanged ("ShowError", false);
+ void onTextChanged (object sender, TextChangeEventArgs e) {
+ if (disableTextChangedEvent)
+ return;
+ undoStack.Push (e.Change.Inverse (source));
+ redoStack.Clear ();
+ CMDUndo.CanExecute = true;
+ CMDRedo.CanExecute = false;
+ apply (e.Change);
}
- void reloadFromFile ()
- {
- if (File.Exists (CurrentFile)) {
- using (Stream s = new FileStream (CurrentFile, FileMode.Open)) {
- using (StreamReader sr = new StreamReader (s))
- origSource = sr.ReadToEnd ();
- }
- Source = origSource;
+ void textView_KeyDown (object sender, Crow.KeyEventArgs e) {
+ if (Ctrl && e.Key == Glfw.Key.W) {
+ if (Shift)
+ CMDRedo.Execute ();
+ else
+ CMDUndo.Execute ();
}
}
- void reloadFromSource ()
- {
+
+ protected override void OnInitialized () {
+ initCommands ();
+
+ base.OnInitialized ();
+
+ if (string.IsNullOrEmpty (CurrentDir))
+ CurrentDir = Path.Combine (Directory.GetCurrentDirectory (), "Interfaces");
+
+ Load ("#ShowCase.showcase.crow").DataSource = this;
+ crowContainer = FindByName ("CrowContainer") as Container;
+ editor = FindByName ("tb") as TextBox;
+
+ if (!File.Exists (CurrentFile))
+ newFile ();
+ //I set an empty object as datasource at this level to force update when new
+ //widgets are added to the interface
+ crowContainer.DataSource = new object ();
hideError ();
- Widget g = null;
- try {
- lock (UpdateMutex) {
- Instantiator inst = null;
- using (MemoryStream ms = new MemoryStream (Encoding.UTF8.GetBytes (source)))
- inst = new Instantiator (this, ms);
- g = inst.CreateInstance ();
- crowContainer.SetChild (g);
- g.DataSource = this;
- }
- } catch (InstantiatorException itorex) {
- //Console.WriteLine (itorex);
- showError (itorex.InnerException);
- } catch (Exception ex) {
- //Console.WriteLine (ex);
- showError (ex);
- }
+
+ reloadFromFile ();
}
- Stopwatch reloadChrono = Stopwatch.StartNew ();
- public override void UpdateFrame () {
+
+ public override void UpdateFrame () {
base.UpdateFrame ();
if (reloadChrono.ElapsedMilliseconds < 200)
return;
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