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|
{
This file is part of the Free Pascal run time library.
Copyright (c) 2003 by the Free Pascal development team
CustomApplication class.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
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.
**********************************************************************}
{$mode objfpc}
{$h+}
unit CustApp;
Interface
uses SysUtils,Classes,singleinstance;
Type
TStringArray = Array of string;
TExceptionEvent = Procedure (Sender : TObject; E : Exception) Of Object;
TEventLogTypes = Set of TEventType;
{ TCustomApplication }
TCustomApplication = Class(TComponent)
Private
FEventLogFilter: TEventLogTypes;
FOnException: TExceptionEvent;
FSingleInstance: TBaseSingleInstance;
FSingleInstanceClass: TBaseSingleInstanceClass; // set before FSingleInstance is created
FSingleInstanceEnabled: Boolean; // set before Initialize is called
FTerminated : Boolean;
FHelpFile,
FTitle : String;
FOptionChar : Char;
FCaseSensitiveOptions : Boolean;
FStopOnException : Boolean;
FExceptionExitCode : Integer;
function GetEnvironmentVar(VarName : String): String;
function GetExeName: string;
Function GetLocation : String;
function GetSingleInstance: TBaseSingleInstance;
procedure SetSingleInstanceClass(
const ASingleInstanceClass: TBaseSingleInstanceClass);
function GetTitle: string;
Protected
function GetOptionAtIndex(AIndex: Integer; IsLong: Boolean): String;
procedure SetTitle(const AValue: string); Virtual;
Function GetConsoleApplication : boolean; Virtual;
Procedure DoRun; Virtual;
Function GetParams(Index : Integer) : String;virtual;
function GetParamCount: Integer;Virtual;
Procedure DoLog(EventType : TEventType; const Msg : String); virtual;
Public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
// Some Delphi methods.
procedure HandleException(Sender: TObject); virtual;
procedure Initialize; virtual;
procedure Run;
procedure ShowException(E: Exception);virtual;
procedure Terminate; virtual;
procedure Terminate(AExitCode : Integer) ; virtual;
// Extra methods.
function FindOptionIndex(Const S : String; Var Longopt : Boolean; StartAt : Integer = -1) : Integer;
Function GetOptionValue(Const S : String) : String;
Function GetOptionValue(Const C: Char; Const S : String) : String;
Function GetOptionValues(Const C: Char; Const S : String) : TStringArray;
Function HasOption(Const S : String) : Boolean;
Function HasOption(Const C : Char; Const S : String) : Boolean;
Function CheckOptions(Const ShortOptions : String; Const Longopts : TStrings; Opts,NonOpts : TStrings; AllErrors : Boolean = False) : String;
Function CheckOptions(Const ShortOptions : String; Const Longopts : Array of string; Opts,NonOpts : TStrings; AllErrors : Boolean = False) : String;
Function CheckOptions(Const ShortOptions : String; Const Longopts : TStrings; AllErrors : Boolean = False) : String;
Function CheckOptions(Const ShortOptions : String; Const LongOpts : Array of string; AllErrors : Boolean = False) : String;
Function CheckOptions(Const ShortOptions : String; Const LongOpts : String; AllErrors : Boolean = False) : String;
Function GetNonOptions(Const ShortOptions : String; Const Longopts : Array of string) : TStringArray;
Procedure GetNonOptions(Const ShortOptions : String; Const Longopts : Array of string; NonOptions : TStrings);
Procedure GetEnvironmentList(List : TStrings;NamesOnly : Boolean);
Procedure GetEnvironmentList(List : TStrings);
Procedure Log(EventType : TEventType; const Msg : String);
Procedure Log(EventType : TEventType; const Fmt : String; const Args : array of const);
// Delphi properties
property ExeName: string read GetExeName;
property HelpFile: string read FHelpFile write FHelpFile;
property Terminated: Boolean read FTerminated;
property Title: string read FTitle write SetTitle;
property OnException: TExceptionEvent read FOnException write FOnException;
// Extra properties
Property ConsoleApplication : Boolean Read GetConsoleApplication;
Property Location : String Read GetLocation;
Property Params [Index : integer] : String Read GetParams;
Property ParamCount : Integer Read GetParamCount;
Property EnvironmentVariable[envName : String] : String Read GetEnvironmentVar;
Property OptionChar : Char Read FoptionChar Write FOptionChar;
Property CaseSensitiveOptions : Boolean Read FCaseSensitiveOptions Write FCaseSensitiveOptions;
Property StopOnException : Boolean Read FStopOnException Write FStopOnException;
Property ExceptionExitCode : Longint Read FExceptionExitCode Write FExceptionExitCode;
Property EventLogFilter : TEventLogTypes Read FEventLogFilter Write FEventLogFilter;
Property SingleInstance: TBaseSingleInstance read GetSingleInstance;
Property SingleInstanceClass: TBaseSingleInstanceClass read FSingleInstanceClass write SetSingleInstanceClass;
Property SingleInstanceEnabled: Boolean read FSingleInstanceEnabled write FSingleInstanceEnabled;
end;
var CustomApplication : TCustomApplication = nil;
Implementation
{$ifdef darwin}
uses
MacOSAll;
{$endif}
{ TCustomApplication }
function TCustomApplication.GetExeName: string;
{$if defined(darwin)}
var
mainBundle: CFBundleRef;
executableUrl: CFURLRef;
executableFSPath: CFStringRef;
utf16len: ptrint;
error: boolean;
begin
error:=false;
{ Get main bundle. This even works most of the time for command line
applications
}
mainbundle:=CFBundleGetMainBundle;
if assigned(mainbundle) then
begin
{ get the URL pointing to the executable of the bundle }
executableUrl:=CFBundleCopyExecutableURL(mainBundle);
if assigned(executableUrl) then
begin
{ convert the url to a POSIX path }
executableFSPath:=CFURLCopyFileSystemPath(executableUrl,kCFURLPOSIXPathStyle);
CFRelease(executableUrl);
{ convert to UTF-8 -- this is not really clean since in theory the
ansi-encoding could be different, but
a) all file i/o routines on Darwin expect utf-8-encoded strings
b) there is no easy way to convert the Unix LANG encoding
setting to an equivalent CoreFoundation encoding
}
utf16len:=CFStringGetLength(executableFSPath);
// +1 for extra terminating #0 in the worst case, so the pos below
// will always find the #0
setlength(result,utf16len*3+1);
if CFStringGetCString(executableFSPath,@result[1],length(result),kCFStringEncodingUTF8) then
{ truncate to actual length, #0 cannot appear in a file path }
setlength(result,pos(#0,result)-1)
else
error:=true;
CFRelease(executableFSPath);
end
else
error:=true;
end
else
error:=true;
if error then
{ can't do better than this }
Result:=Paramstr(0);
end;
{$else darwin}
begin
Result:=Paramstr(0);
end;
{$endif darwin}
Procedure SysGetEnvironmentList(List : TStrings;NamesOnly : Boolean);
var
s : string;
i,l,j,count : longint;
begin
count:=GetEnvironmentVariableCount;
if count>0 then
for j:=1 to count do
begin
s:=GetEnvironmentString(j);
l:=Length(s);
If NamesOnly then
begin
I:=pos('=',s);
If (I>0) then
S:=Copy(S,1,I-1);
end;
List.Add(S);
end;
end;
function TCustomApplication.GetEnvironmentVar(VarName : String): String;
begin
Result:=GetEnvironmentVariable(VarName);
end;
procedure TCustomApplication.GetEnvironmentList(List: TStrings;
NamesOnly: Boolean);
begin
// Routine must be in custapp.inc
SysGetEnvironmentList(List,NamesOnly);
end;
procedure TCustomApplication.GetEnvironmentList(List: TStrings);
begin
GetEnvironmentList(List,False);
end;
function TCustomApplication.GetLocation: String;
begin
Result:=ExtractFilePath(GetExeName);
end;
function TCustomApplication.GetParamCount: Integer;
begin
Result:=System.ParamCount;
end;
function TCustomApplication.GetTitle: string;
begin
Result:=FTitle;
end;
function TCustomApplication.GetParams(Index: Integer): String;
begin
Result:=ParamStr(Index);
end;
function TCustomApplication.GetSingleInstance: TBaseSingleInstance;
begin
if FSingleInstance = nil then
begin
if FSingleInstanceClass=Nil then
Raise ESingleInstance.Create('No single instance provider class set! Include a single-instance class unit such as advsingleinstance');
FSingleInstance := FSingleInstanceClass.Create(Self);
end;
Result := FSingleInstance;
end;
procedure TCustomApplication.SetTitle(const AValue: string);
begin
FTitle:=AValue;
end;
function TCustomApplication.GetConsoleApplication: boolean;
begin
Result:=IsConsole;
end;
procedure TCustomApplication.DoRun;
begin
if Assigned(FSingleInstance) then
if FSingleInstance.IsServer then
FSingleInstance.ServerCheckMessages;
// Override in descendent classes.
end;
procedure TCustomApplication.DoLog(EventType: TEventType; const Msg: String);
begin
// Do nothing, override in descendants
end;
procedure TCustomApplication.Log(EventType: TEventType; const Msg: String);
begin
If (FEventLogFilter=[]) or (EventType in FEventLogFilter) then
DoLog(EventType,Msg);
end;
procedure TCustomApplication.Log(EventType: TEventType; const Fmt: String;
const Args: array of const);
begin
try
Log(EventType, Format(Fmt, Args));
except
On E : Exception do
Log(etError,Format('Error formatting message "%s" with %d arguments: %s',[Fmt,Length(Args),E.Message]));
end
end;
constructor TCustomApplication.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FOptionChar:='-';
FCaseSensitiveOptions:=True;
FStopOnException:=False;
FSingleInstanceClass := DefaultSingleInstanceClass;
end;
destructor TCustomApplication.Destroy;
begin
inherited Destroy;
end;
procedure TCustomApplication.HandleException(Sender: TObject);
begin
If Not (ExceptObject is Exception) then
SysUtils.showexception(ExceptObject,ExceptAddr)
else
begin
If Not Assigned(FOnexception) then
ShowException(Exception(ExceptObject))
else
FOnException(Sender,Exception(ExceptObject));
end;
If FStopOnException then
Terminate(ExceptionExitCode);
end;
procedure TCustomApplication.Initialize;
begin
FTerminated:=False;
if FSingleInstanceEnabled then
begin
case SingleInstance.Start of
siClient:
begin
SingleInstance.ClientPostParams;
FTerminated:=True;
end;
siNotResponding:
FTerminated:=True;
end;
end;
end;
procedure TCustomApplication.Run;
begin
Repeat
Try
DoRun;
except
HandleException(Self);
end;
Until FTerminated;
end;
procedure TCustomApplication.SetSingleInstanceClass(
const ASingleInstanceClass: TBaseSingleInstanceClass);
begin
Assert((FSingleInstance = nil) and (ASingleInstanceClass <> nil));
FSingleInstanceClass := ASingleInstanceClass;
end;
procedure TCustomApplication.ShowException(E: Exception);
begin
Sysutils.ShowException(E,ExceptAddr)
end;
procedure TCustomApplication.Terminate;
begin
Terminate(0);
end;
procedure TCustomApplication.Terminate(AExitCode : Integer) ;
begin
FTerminated:=True;
If (AExitCode<>0) then
ExitCode:=AExitCode;
end;
function TCustomApplication.GetOptionAtIndex(AIndex : Integer; IsLong: Boolean): String;
Var
P : Integer;
O : String;
begin
Result:='';
If (AIndex=-1) then
Exit;
If IsLong then
begin // Long options have form --option=value
O:=Params[AIndex];
P:=Pos('=',O);
If (P=0) then
P:=Length(O);
Delete(O,1,P);
Result:=O;
end
else
begin // short options have form '-o value'
If (AIndex<ParamCount) then
if (Copy(Params[AIndex+1],1,1)<>'-') then
Result:=Params[AIndex+1];
end;
end;
function TCustomApplication.GetOptionValue(const S: String): String;
begin
Result:=GetoptionValue(#255,S);
end;
function TCustomApplication.GetOptionValue(const C: Char; const S: String
): String;
Var
B : Boolean;
I : integer;
begin
Result:='';
I:=FindOptionIndex(C,B);
If (I=-1) then
I:=FindOptionIndex(S,B);
If I<>-1 then
Result:=GetOptionAtIndex(I,B);
end;
function TCustomApplication.GetOptionValues(const C: Char; const S: String): TStringArray;
Var
I,Cnt : Integer;
B : Boolean;
begin
SetLength(Result,ParamCount);
Cnt:=0;
Repeat
I:=FindOptionIndex(C,B,I);
If I<>-1 then
begin
Inc(Cnt);
Dec(I);
end;
Until I=-1;
Repeat
I:=FindOptionIndex(S,B,I);
If I<>-1 then
begin
Inc(Cnt);
Dec(I);
end;
Until I=-1;
SetLength(Result,Cnt);
Cnt:=0;
I:=-1;
Repeat
I:=FindOptionIndex(C,B,I);
If (I<>-1) then
begin
Result[Cnt]:=GetOptionAtIndex(I,False);
Inc(Cnt);
Dec(i);
end;
Until (I=-1);
I:=-1;
Repeat
I:=FindOptionIndex(S,B,I);
If I<>-1 then
begin
Result[Cnt]:=GetOptionAtIndex(I,True);
Inc(Cnt);
Dec(i);
end;
Until (I=-1);
end;
function TCustomApplication.HasOption(const S: String): Boolean;
Var
B : Boolean;
begin
Result:=FindOptionIndex(S,B)<>-1;
end;
function TCustomApplication.FindOptionIndex(const S: String;
var Longopt: Boolean; StartAt : Integer = -1): Integer;
Var
SO,O : String;
I,P : Integer;
begin
If Not CaseSensitiveOptions then
SO:=UpperCase(S)
else
SO:=S;
Result:=-1;
I:=StartAt;
if (I=-1) then
I:=ParamCount;
While (Result=-1) and (I>0) do
begin
O:=Params[i];
// - must be seen as an option value
If (Length(O)>1) and (O[1]=FOptionChar) then
begin
Delete(O,1,1);
LongOpt:=(Length(O)>0) and (O[1]=FOptionChar);
If LongOpt then
begin
Delete(O,1,1);
P:=Pos('=',O);
If (P<>0) then
O:=Copy(O,1,P-1);
end;
If Not CaseSensitiveOptions then
O:=UpperCase(O);
If (O=SO) then
Result:=i;
end;
Dec(i);
end;
end;
function TCustomApplication.HasOption(const C: Char; const S: String): Boolean;
Var
B : Boolean;
begin
Result:=(FindOptionIndex(C,B)<>-1) or (FindOptionIndex(S,B)<>-1);
end;
function TCustomApplication.CheckOptions(const ShortOptions: String;
const Longopts: TStrings; AllErrors: Boolean): String;
begin
Result:=CheckOptions(ShortOptions,LongOpts,Nil,Nil,AllErrors);
end;
ResourceString
SErrInvalidOption = 'Invalid option at position %d: "%s"';
SErrNoOptionAllowed = 'Option at position %d does not allow an argument: %s';
SErrOptionNeeded = 'Option at position %d needs an argument : %s';
function TCustomApplication.CheckOptions(const ShortOptions: String;
const Longopts: TStrings; Opts, NonOpts: TStrings; AllErrors: Boolean
): String;
Var
I,J,L,P : Integer;
O,OV,SO : String;
UsedArg,HaveArg : Boolean;
Function FindLongOpt(S : String) : boolean;
Var
I : integer;
begin
Result:=Assigned(LongOpts);
if Not Result then
exit;
If CaseSensitiveOptions then
begin
I:=LongOpts.Count-1;
While (I>=0) and (LongOpts[i]<>S) do
Dec(i);
end
else
begin
S:=UpperCase(S);
I:=LongOpts.Count-1;
While (I>=0) and (UpperCase(LongOpts[i])<>S) do
Dec(i);
end;
Result:=(I<>-1);
end;
Procedure AddToResult(Const Msg : string);
begin
If (Result<>'') then
Result:=Result+sLineBreak;
Result:=Result+Msg;
end;
begin
If CaseSensitiveOptions then
SO:=Shortoptions
else
SO:=LowerCase(Shortoptions);
Result:='';
I:=1;
While (I<=ParamCount) and ((Result='') or AllErrors) do
begin
O:=Paramstr(I);
If (Length(O)=0) or (O[1]<>FOptionChar) then
begin
If Assigned(NonOpts) then
NonOpts.Add(O);
end
else
begin
If (Length(O)<2) then
AddToResult(Format(SErrInvalidOption,[i,O]))
else
begin
HaveArg:=False;
OV:='';
// Long option ?
If (O[2]=FOptionChar) then
begin
Delete(O,1,2);
J:=Pos('=',O);
If J<>0 then
begin
HaveArg:=true;
OV:=O;
Delete(OV,1,J);
O:=Copy(O,1,J-1);
end;
// Switch Option
If FindLongopt(O) then
begin
If HaveArg then
AddToResult(Format(SErrNoOptionAllowed,[I,O]));
end
else
begin // Required argument
If FindLongOpt(O+':') then
begin
If Not HaveArg then
AddToResult(Format(SErrOptionNeeded,[I,O]));
end
else
begin // Optional Argument.
If not FindLongOpt(O+'::') then
AddToResult(Format(SErrInvalidOption,[I,O]));
end;
end;
end
else // Short Option.
begin
HaveArg:=(I<ParamCount) and (Length(ParamStr(I+1))>0) and (ParamStr(I+1)[1]<>FOptionChar);
UsedArg:=False;
If HaveArg then
OV:=Paramstr(I+1);
If Not CaseSensitiveOptions then
O:=LowerCase(O);
L:=Length(O);
J:=2;
While ((Result='') or AllErrors) and (J<=L) do
begin
P:=Pos(O[J],ShortOptions);
If (P=0) or (O[j]=':') then
AddToResult(Format(SErrInvalidOption,[I,O[J]]))
else
begin
If (P<Length(ShortOptions)) and (Shortoptions[P+1]=':') then
begin
// Required argument
If ((P+1)=Length(ShortOptions)) or (Shortoptions[P+2]<>':') Then
If (J<L) or not haveArg then // Must be last in multi-opt !!
AddToResult(Format(SErrOptionNeeded,[I,O[J]]));
O:=O[j]; // O is added to arguments.
UsedArg:=True;
end;
end;
Inc(J);
end;
If HaveArg and UsedArg then
begin
Inc(I); // Skip argument.
O:=O[Length(O)]; // O is added to arguments !
end;
end;
If HaveArg and ((Result='') or AllErrors) then
If Assigned(Opts) then
Opts.Add(O+'='+OV);
end;
end;
Inc(I);
end;
end;
function TCustomApplication.CheckOptions(const ShortOptions: String;
const Longopts: array of string; Opts, NonOpts: TStrings; AllErrors: Boolean
): String;
Var
L : TStringList;
I : Integer;
begin
L:=TStringList.Create;
Try
For I:=0 to High(LongOpts) do
L.Add(LongOpts[i]);
Result:=CheckOptions(ShortOptions,L,Opts,NonOpts,AllErrors);
Finally
L.Free;
end;
end;
function TCustomApplication.CheckOptions(const ShortOptions: String;
const LongOpts: array of string; AllErrors: Boolean): String;
Var
L : TStringList;
I : Integer;
begin
L:=TStringList.Create;
Try
For I:=0 to High(LongOpts) do
L.Add(LongOpts[i]);
Result:=CheckOptions(ShortOptions,L,AllErrors);
Finally
L.Free;
end;
end;
function TCustomApplication.CheckOptions(const ShortOptions: String;
const LongOpts: String; AllErrors: Boolean): String;
Const
SepChars = ' '#10#13#9;
Var
L : TStringList;
Len,I,J : Integer;
begin
L:=TStringList.Create;
Try
I:=1;
Len:=Length(LongOpts);
While I<=Len do
begin
While Isdelimiter(SepChars,LongOpts,I) do
Inc(I);
J:=I;
While (J<=Len) and Not IsDelimiter(SepChars,LongOpts,J) do
Inc(J);
If (I<=J) then
L.Add(Copy(LongOpts,I,(J-I)));
I:=J+1;
end;
Result:=CheckOptions(Shortoptions,L,AllErrors);
Finally
L.Free;
end;
end;
function TCustomApplication.GetNonOptions(const ShortOptions: String;
const Longopts: array of string): TStringArray;
Var
NO : TStrings;
I : Integer;
begin
No:=TStringList.Create;
try
GetNonOptions(ShortOptions,LongOpts,No);
SetLength(Result,NO.Count);
For I:=0 to NO.Count-1 do
Result[I]:=NO[i];
finally
NO.Free;
end;
end;
procedure TCustomApplication.GetNonOptions(const ShortOptions: String;
const Longopts: array of string; NonOptions: TStrings);
Var
S : String;
begin
S:=CheckOptions(ShortOptions,LongOpts,Nil,NonOptions,true);
if (S<>'') then
Raise EListError.Create(S);
end;
end.
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