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{
This file is part of the Free Pascal run time library.
Copyright (c) 2008 by Giulio Bernardi
Accelerator table resource type
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.
**********************************************************************}
unit acceleratorsresource;
{$MODE OBJFPC}
interface
uses
Classes, SysUtils, resource;
const
FVirtKey = 1;
FNoInvert = 2;
FShift = 4;
FControl = 8;
FAlt = 16;
type
TAccelerator = packed record
Flags : word;
Ansi : word;
Id : word;
padding : word;
end;
PAccelerator = ^TAccelerator;
type
{ TAcceleratorsResource }
TAcceleratorsResource = class(TAbstractResource)
private
fType : TResourceDesc;
fName : TResourceDesc;
fList : TFPList;
procedure CheckDataLoaded;
function GetCount : integer;
function GetItem(index : integer) : TAccelerator;
procedure SetItem(index : integer; aAccelerator : TAccelerator);
protected
function GetType : TResourceDesc; override;
function GetName : TResourceDesc; override;
function ChangeDescTypeAllowed(aDesc : TResourceDesc) : boolean; override;
function ChangeDescValueAllowed(aDesc : TResourceDesc) : boolean; override;
procedure NotifyResourcesLoaded; override;
public
constructor Create; override;
constructor Create(aType,aName : TResourceDesc); override;
destructor Destroy; override;
procedure UpdateRawData; override;
procedure Add(aItem : TAccelerator);
procedure Clear;
procedure Delete(aIndex : integer);
property Count : integer read GetCount;
property Items[index : integer] : TAccelerator read GetItem write SetItem; default;
end;
implementation
uses
resfactory;
{ TAcceleratorsResource }
procedure TAcceleratorsResource.CheckDataLoaded;
var acc : TAccelerator;
tot, i : integer;
p : PAccelerator;
begin
if fList<>nil then exit;
fList:=TFPList.Create;
if RawData.Size=0 then exit;
RawData.Position:=0;
tot:=RawData.Size div 8;
for i:=1 to tot do
begin
RawData.ReadBuffer(acc,sizeof(acc));
{$IFDEF ENDIAN_BIG}
acc.Flags:=SwapEndian(acc.Flags);
acc.Ansi:=SwapEndian(acc.Ansi);
acc.Id:=SwapEndian(acc.Id);
acc.padding:=SwapEndian(acc.padding);
{$ENDIF}
GetMem(p,sizeof(TAccelerator));
p^:=acc;
fList.Add(p);
end;
end;
function TAcceleratorsResource.GetCount: integer;
begin
CheckDataLoaded;
Result:=fList.Count;
end;
function TAcceleratorsResource.GetItem(index: integer): TAccelerator;
begin
CheckDataLoaded;
Result:=PAccelerator(fList[index])^;
end;
procedure TAcceleratorsResource.SetItem(index: integer;
aAccelerator: TAccelerator);
begin
CheckDataLoaded;
PAccelerator(fList[index])^:=aAccelerator;
end;
function TAcceleratorsResource.GetType: TResourceDesc;
begin
Result:=fType;
end;
function TAcceleratorsResource.GetName: TResourceDesc;
begin
Result:=fName;
end;
function TAcceleratorsResource.ChangeDescTypeAllowed(aDesc: TResourceDesc
): boolean;
begin
Result:=aDesc=fName;
end;
function TAcceleratorsResource.ChangeDescValueAllowed(aDesc: TResourceDesc
): boolean;
begin
Result:=aDesc=fName;
end;
procedure TAcceleratorsResource.NotifyResourcesLoaded;
begin
end;
constructor TAcceleratorsResource.Create;
begin
inherited Create;
fList:=nil;
fType:=TResourceDesc.Create(RT_ACCELERATOR);
fName:=TResourceDesc.Create(1);
SetDescOwner(fType);
SetDescOwner(fName);
end;
constructor TAcceleratorsResource.Create(aType, aName: TResourceDesc);
begin
Create;
fName.Assign(aName);
end;
destructor TAcceleratorsResource.Destroy;
begin
fType.Free;
fName.Free;
if fList<>nil then
begin
Clear;
fList.Free;
end;
inherited Destroy;
end;
procedure TAcceleratorsResource.UpdateRawData;
var acc : TAccelerator;
i : integer;
begin
if fList=nil then exit;
RawData.Size:=0;
RawData.Position:=0;
if fList.Count>0 then
for i:=0 to fList.Count-1 do
begin
acc:=PAccelerator(fList[i])^;
// $80 means 'this is the last entry', so be sure only the last one has this bit set.
if i=Count-1 then acc.Flags:=acc.Flags or $80
else acc.Flags:=acc.Flags and $7F;
{$IFDEF ENDIAN_BIG}
acc.Flags:=SwapEndian(acc.Flags);
acc.Ansi:=SwapEndian(acc.Ansi);
acc.Id:=SwapEndian(acc.Id);
acc.padding:=SwapEndian(acc.padding);
{$ENDIF}
RawData.WriteBuffer(acc,sizeof(acc));
end;
Clear;
FreeAndNil(fList);
end;
procedure TAcceleratorsResource.Add(aItem: TAccelerator);
var p : PAccelerator;
begin
CheckDataLoaded;
GetMem(p,sizeof(TAccelerator));
p^:=aItem;
fList.Add(p);
end;
procedure TAcceleratorsResource.Clear;
var p : PAccelerator;
i : integer;
begin
CheckDataLoaded;
for i:=0 to fList.Count-1 do
begin
p:=PAccelerator(fList[i]);
FreeMem(p);
end;
fList.Clear;
end;
procedure TAcceleratorsResource.Delete(aIndex: integer);
var p : PAccelerator;
begin
CheckDataLoaded;
p:=PAccelerator(fList[aIndex]);
FreeMem(p);
fList.Delete(aIndex);
end;
initialization
TResourceFactory.RegisterResourceClass(RT_ACCELERATOR,TAcceleratorsResource);
end.
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