lazc: started simple identifier completion

git-svn-id: trunk@23502 -

components/compilers/c/lazc.pas

@@ -1,13 +1,13 @@
-{ This file was automatically created by Lazarus. Do not edit!
-This source is only used to compile and install the package.
+{ This file was automatically created by Lazarus. do not edit!
+  This source is only used to compile and install the package.
  }
 
-unit LazC; 
+unit lazc; 
 
 interface
 
 uses
-  LazCUtil, LazCStrConsts, LazarusPackageIntf; 
+  LazCUtil, LazCStrConsts, LazarusPackageIntf;
 
 implementation
 

components/compilers/c/lazcutil.pas

@@ -34,8 +34,7 @@ unit LazCUtil;
 interface
 
 uses
-  Classes, SysUtils, LCLProc, IDEMsgIntf, LazCStrConsts;
-  
+  Classes, SysUtils, LCLProc, IDEMsgIntf, LazCStrConsts, SrcEditorIntf, LCLType;
 
 type
 
@@ -54,7 +53,40 @@ type
     function Description: string; override;
     function StartScan(Lines: TIDEMessageLineList): TIDEMsgScanner; override;
   end;
-  
+
+  { TCSrcEditCompletion }
+
+  TCSrcEditCompletion = class(TSourceEditorCompletionPlugin)
+  private
+    FEditor: TSourceEditorInterface;
+    FFilteredList: TStrings;
+    FLastPrefix: string;
+    FList: TStrings;
+    procedure SetLastPrefix(const AValue: string);
+    procedure RebuildFilteredList;
+  public
+    constructor Create(AOwner: TComponent); override;
+    destructor Destroy; override;
+    procedure Cancel; override;
+    function Collect(List: TStrings): boolean; override;
+    procedure Complete(var Value: string; SourceValue: string; var SourceStart,
+      SourceEnd: TPoint; KeyChar: TUTF8Char; Shift: TShiftState); override;
+    procedure CompletePrefix(var Prefix: string); override;
+    procedure IndexChanged(Position: integer); override;
+    procedure Init(SrcEdit: TSourceEditorInterface; JumpToError: boolean;
+      var Handled, Abort: boolean; var Prefix: string; var BoxX, BoxY: integer
+      ); override;
+    procedure PrefixChanged(const NewPrefix: string; var NewIndex: integer;
+      var s: TStrings); override;
+    property Editor: TSourceEditorInterface read FEditor;
+    property List: TStrings read FList;
+    property FilteredList: TStrings read FFilteredList;
+    property LastPrefix: string read FLastPrefix write SetLastPrefix;
+  end;
+
+var
+  CSrcEditCompletion: TCSrcEditCompletion = nil;
+
 procedure Register;
 
 implementation
@@ -66,6 +98,8 @@ begin
   Scanner:=TGCCMsgScannerType.Create(nil);
   Scanner.Name:='GCC';
   IDEMsgScanners.RegisterType(Scanner);
+  CSrcEditCompletion:=TCSrcEditCompletion.Create(nil);
+  SourceEditorWindow.RegisterCompletionPlugin(CSrcEditCompletion);
 end;
 
 { TGCCMessageScanner }
@@ -95,5 +129,129 @@ begin
   Result:=TGCCMessageScanner.Create(Self,Lines);
 end;
 
+{ TCSrcEditCompletion }
+
+procedure TCSrcEditCompletion.SetLastPrefix(const AValue: string);
+begin
+  if FLastPrefix=AValue then exit;
+  FLastPrefix:=AValue;
+  RebuildFilteredList;
+end;
+
+procedure TCSrcEditCompletion.RebuildFilteredList;
+var
+  i: Integer;
+  s: string;
+  len: Integer;
+  p: PChar;
+begin
+  FFilteredList.Clear;
+  len:=length(LastPrefix);
+  p:=PChar(LastPrefix);
+  for i:=0 to FList.Count-1 do begin
+    s:=FList[i];
+    if length(s)<len then continue;
+    if (len=0) or CompareMem(PChar(s),p,len) then
+      FFilteredList.Add(s);
+  end;
+end;
+
+constructor TCSrcEditCompletion.Create(AOwner: TComponent);
+begin
+  inherited Create(AOwner);
+  FList:=TStringList.Create;
+  FFilteredList:=TStringList.Create;
+end;
+
+destructor TCSrcEditCompletion.Destroy;
+begin
+  FreeAndNil(FFilteredList);
+  FreeAndNil(FList);
+  inherited Destroy;
+end;
+
+procedure TCSrcEditCompletion.Cancel;
+begin
+  //DebugLn(['TCSrcEditCompletion.Cancel ']);
+  FEditor:=nil;
+  FList.Clear;
+  FFilteredList.Clear;
+end;
+
+function TCSrcEditCompletion.Collect(List: TStrings): boolean;
+begin
+  //DebugLn(['TCSrcEditCompletion.Collect ',FFilteredList.Count]);
+  List.Assign(FFilteredList);
+  Result:=true;
+end;
+
+procedure TCSrcEditCompletion.Complete(var Value: string; SourceValue: string;
+  var SourceStart, SourceEnd: TPoint; KeyChar: TUTF8Char; Shift: TShiftState);
+begin
+  // remove formatting tags
+  //DebugLn(['TCSrcEditCompletion.Complete Value=',dbgstr(Value),' SourceValue=',dbgstr(SourceValue)]);
+end;
+
+procedure TCSrcEditCompletion.CompletePrefix(var Prefix: string);
+begin
+  //DebugLn(['TCSrcEditCompletion.CompletePrefix Prefx=',Prefix]);
+  LastPrefix:=Prefix;
+end;
+
+procedure TCSrcEditCompletion.IndexChanged(Position: integer);
+begin
+  //DebugLn(['TCSrcEditCompletion.IndexChanged ',Position]);
+end;
+
+procedure TCSrcEditCompletion.Init(SrcEdit: TSourceEditorInterface;
+  JumpToError: boolean; var Handled, Abort: boolean; var Prefix: string;
+  var BoxX, BoxY: integer);
+var
+  Ext: String;
+begin
+  Ext:=ExtractFileExt(SrcEdit.FileName);
+  if not ((Ext='.c') or (Ext='.C') or (Ext='.cc') or (Ext='.CC')
+    or (Ext='.cpp') or (Ext='.CPP'))
+  then begin
+    // not responsible
+    exit;
+  end;
+  //DebugLn(['TCSrcEditCompletion.Init ',SrcEdit.FileName,' Prefix=',Prefix]);
+  // provide completion for c source files
+  Handled:=true;
+  FList.Clear;
+  FList.Add('int');
+  FList.Add('int8');
+  FList.Add('int16');
+  FList.Add('int32');
+  FList.Add('char');
+  FList.Add('long');
+  FList.Add('bool');
+  FList.Add('void');
+  FList.Add('float');
+  FList.Add('double');
+  FList.Add('signed');
+  FList.Add('struct');
+  FList.Add('typedef');
+  FList.Add('unsigned');
+  FList.Add('public');
+  FList.Add('private');
+  FList.Add('define');
+  FLastPrefix:=Prefix;
+  RebuildFilteredList;
+end;
+
+procedure TCSrcEditCompletion.PrefixChanged(const NewPrefix: string;
+  var NewIndex: integer; var s: TStrings);
+begin
+  //DebugLn(['TCSrcEditCompletion.PrefixChanged NewPrefix=',NewPrefix]);
+  NewIndex:=0;
+  LastPrefix:=NewPrefix;
+  s.Assign(FFilteredList);
+end;
+
+finalization
+  FreeAndNil(CSrcEditCompletion);
+
 end.