{
	This file is part of the Mufasa Macro Library (MML)
	Copyright (c) 2009 by Raymond van Venetië and Merlijn Wajer

    MML 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.

    MML 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 MML.  If not, see <http://www.gnu.org/licenses/>.

	See the file COPYING, included in this distribution,
	for details about the copyright.

    framescript for the Mufasa Macro Library
}  
unit framescript;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, LResources, Forms, SynHighlighterPas, SynEdit,
   mmlpsthread,ComCtrls, SynEditKeyCmds, LCLType, SynEditMarkupSpecialLine, Graphics;

type
  TScriptState = (ss_None,ss_Running,ss_Paused,ss_Stopping);
  {
    ss_None: Means the script either hasn't been run yet, or it has ended (Succesfully or terminated)
    ss_Running: Means the script is running as we speak :-)
    ss_Paused: Means the script is currently in pause modus.
    ss_Stopping: Means we've asked PS-Script politely to stop the script (next time we press the stop button we won't be that nice).
  }
  { TScriptFrame }

  TScriptFrame = class(TFrame)
    SynEdit: TSynEdit;
    SynFreePascalSyn1: TSynFreePascalSyn;
    procedure SynEditChange(Sender: TObject);
    procedure SynEditProcessCommand(Sender: TObject;
      var Command: TSynEditorCommand; var AChar: TUTF8Char; Data: pointer);
    procedure SynEditSpecialLineColors(Sender: TObject; Line: integer;
      var Special: boolean; var FG, BG: TColor);

  private
    OwnerPage  : TPageControl;
    OwnerSheet : TTabSheet;//The owner TTabsheet -> For title setting
  public
    ScriptErrorLine : integer; //Highlight the error line!
    ScriptFile : string;//The path to the saved/opened file currently in the SynEdit
    StartText : string;//The text synedit holds upon start/open/save
    ScriptName : string;//The name of the currently opened/saved file.
    ScriptDefault : string;//The default script e.g. program new; begin end.
    ScriptChanged : boolean;//We need this for that little * (edited star).
    ScriptThread : TMMLPSThread;//Just one thread for now..
    FScriptState : TScriptState;//Stores the ScriptState, if you want the Run/Pause/Start buttons to change accordingly, acces through Form1
    procedure undo;
    procedure redo;
    procedure ErrorThread(ErrorAtLine,ErrorPosition : integer; ErrorStr : string; ErrorType : TErrorType);
    procedure MakeActiveScriptFrame;
    procedure ScriptThreadTerminate(Sender: TObject);
    constructor Create(TheOwner: TComponent); override;
    destructor Destroy; override;
    { public declarations }
  end;

implementation
uses
  TestUnit;

{ TScriptFrame }

procedure TScriptFrame.SynEditChange(Sender: TObject);
begin
  ScriptErrorLine:= -1;
  if not ScriptChanged then
  begin;
    ScriptChanged:= True;
    Form1.Caption:= Format(WindowTitle,[ScriptName + '*']);
    OwnerSheet.Caption:=ScriptName + '*';
  end;
end;

procedure TScriptFrame.SynEditProcessCommand(Sender: TObject;
  var Command: TSynEditorCommand; var AChar: TUTF8Char; Data: pointer);
begin
  if Command = ecUndo then
  begin;
    Command:= ecNone;
    Self.Undo;
  end else
  if Command = ecRedo then
  begin;
    Command := ecNone;
    Self.Redo;
  end;
end;

procedure TScriptFrame.SynEditSpecialLineColors(Sender: TObject;
  Line: integer; var Special: boolean; var FG, BG: TColor);
begin
  if line = ScriptErrorLine then
  begin;
    Special := true;
    BG := $50a0ff;
    FG := 0;
  end;
end;

procedure TScriptFrame.undo;
begin
  SynEdit.Undo;
  if ScriptChanged then
    if SynEdit.Lines.Text = StartText then
    begin;
      Form1.Caption:= format(WindowTitle,[ScriptName]);
      OwnerSheet.Caption:= ScriptName;
      ScriptChanged := false;
    end;
end;

procedure TScriptFrame.redo;
begin
  SynEdit.Redo;
  if ScriptChanged then
    if SynEdit.Lines.Text = StartText then
    begin;
      Form1.Caption:= format(WindowTitle,[ScriptName]);
      OwnerSheet.Caption := ScriptName;
      ScriptChanged := false;
    end;
end;

procedure TScriptFrame.ErrorThread(ErrorAtLine, ErrorPosition: integer;
  ErrorStr: string; ErrorType: TErrorType);
begin
  MakeActiveScriptFrame;
  ScriptErrorLine:= ErrorAtLine;
  SynEdit.Invalidate;
  SynEdit.SelStart:= ErrorPosition;
  formWriteln(Format('Error: %s at line %d',[errorstr,erroratline]));
end;

procedure TScriptFrame.MakeActiveScriptFrame;
var
  i : integer;
begin
  for i := 0 to OwnerPage.PageCount - 1 do
    if OwnerPage.Pages[i] = OwnerSheet then
    begin;
      OwnerPage.TabIndex := i;
      OwnerSheet.SetFocus;
      exit;
    end;
end;

procedure TScriptFrame.ScriptThreadTerminate(Sender: TObject);
begin
  FScriptState:= ss_None;
  Form1.RefreshTab;
end;

constructor TScriptFrame.Create(TheOwner: TComponent);
begin
  inherited Create(TheOwner);
  OwnerSheet := TTabSheet(TheOwner);
  OwnerPage := TPageControl(OwnerSheet.Owner);
  StartText:= SynEdit.Lines.text;
  ScriptDefault:= StartText;
  ScriptName:= 'Untitled';
  ScriptChanged := false;
  FScriptState:= ss_None;
  ScriptErrorLine:= -1;
  OwnerSheet.Caption:= ScriptName;
  SynEdit.IncrementColor.Background := $30D070;
  SynEdit.HighlightAllColor.Background:= clYellow;
  SynEdit.HighlightAllColor.Foreground:= clDefault;
end;

destructor TScriptFrame.Destroy;
begin
  inherited Destroy;
end;

initialization
  {$I framescript.lrs}

end.