{
 ***************************************************************************
 *                                                                         *
 *   This source 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
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 *   This code 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.                              *
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 *   obtain it by writing to the Free Software Foundation,                 *
 *   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.        *
 *                                                                         *
 ***************************************************************************

  Author: Mattias Gaertner
  
  Abstract:
    Dialog used by the fpdoc editor to create a link.
}
unit FPDocSelectLink;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, LCLProc, Forms, Controls, Graphics,
  ExtCtrls, StdCtrls, ButtonPanel, FileUtil, LazFileUtils, LCLType, AvgLvlTree,
  Laz2_DOM, PackageIntf, ProjectIntf,
  CodeHelp, LazarusIDEStrConsts, PackageSystem, PackageDefs;

type

  { TFPDocLinkCompletionItem }

  TFPDocLinkCompletionItem = class
  public
    Text: string;
    Description: string;
    constructor Create(const AText, ADescription: string);
  end;

  { TFPDocLinkCompletionList }

  TFPDocLinkCompletionList = class
  private
    FBGColor: TColor;
    FItemHeight: integer;
    FItems: TFPList; // list of TFPDocLinkCompletionItem
    FPrefix: string;
    FSelected: integer;
    FSelectedBGColor: TColor;
    FSelectedTextColor: TColor;
    FSorted: Boolean;
    FTextColor: TColor;
    FTop: integer;
    FVisibleItems: integer;
    FTree: TAvgLvlTree; // tree of TFPDocLinkCompletionItem
    function GetCount: integer;
    function GetItems(Index: integer): TFPDocLinkCompletionItem;
    procedure SetSorted(const AValue: Boolean);
    procedure SetTop(const AValue: integer);
  public
    constructor Create;
    destructor Destroy; override;
    procedure Clear;
    procedure Sort;
    procedure AddPackage(Pkg: TLazPackage);
    procedure Add(Identifier, Description: string);
    procedure AddIdentifier(Identifier: string);
    procedure Draw(Canvas: TCanvas; Width, Height: integer);
    property Count: integer read GetCount;
    property Sorted: Boolean read FSorted write SetSorted;
    property Items[Index: integer]: TFPDocLinkCompletionItem read GetItems;
    property ItemHeight: integer read FItemHeight write FItemHeight;// pixel per item
    property VisibleItems: integer read FVisibleItems write FVisibleItems;// visible lines
    property Top: integer read FTop write SetTop;
    property Selected: integer read FSelected write FSelected;
    property Prefix: string read FPrefix write FPrefix;
    property BGColor: TColor read FBGColor write FBGColor;
    property TextColor: TColor read FTextColor write FTextColor;
    property SelectedBGColor: TColor read FSelectedBGColor write FSelectedBGColor;
    property SelectedTextColor: TColor read FSelectedTextColor write FSelectedTextColor;
  end;

  { TFPDocLinkEditorDlg }

  TFPDocLinkEditorDlg = class(TForm)
    ButtonPanel1: TButtonPanel;
    CompletionBox: TPaintBox;
    TitleEdit: TEdit;
    TitleLabel: TLabel;
    LinkEdit: TEdit;
    LinkLabel: TLabel;
    procedure CompletionBoxMouseDown(Sender: TObject; {%H-}Button: TMouseButton;
      {%H-}Shift: TShiftState; {%H-}X, Y: Integer);
    procedure CompletionBoxPaint(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure LinkEditChange(Sender: TObject);
    procedure LinkEditKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);
  private
    FStartFPDocFile: TLazFPDocFile;
    fItems: TFPDocLinkCompletionList;
    FSourceFilename: string;
    FStartModuleOwner: TObject;
    fUpdatingItems: boolean;
    function GetLink: string;
    function GetLinkTitle: string;
    procedure SetStartFPDocFile(const AValue: TLazFPDocFile);
    procedure SetLink(const AValue: string);
    procedure SetLinkTitle(const AValue: string);
    procedure SetSourceFilename(const AValue: string);
    procedure SetStartModuleOwner(const AValue: TObject);
    procedure UpdateCompletionBox;
    procedure AddPackagesToCompletion(Prefix: string);
    procedure AddModuleUnits(ModuleOwner: TObject; Prefix: string);
    procedure AddProjectUnits(AProject: TLazProject; Prefix: string);
    procedure AddPackageUnits(APackage: TLazPackage; Prefix: string);
    procedure AddIdentifiers(ModuleOwner: TObject; FPDocFile: TLazFPDocFile;
                             Prefix: string);
    procedure AddSubIdentifiers(Path: string);
  public
    procedure SetLinkAndContext(const ASrcFilename, ATitle, ALink: string;
                      ADocFile: TLazFPDocFile);
    property SourceFilename: string read FSourceFilename write SetSourceFilename;
    property LinkTitle: string read GetLinkTitle write SetLinkTitle;
    property Link: string read GetLink write SetLink;
    property StartFPDocFile: TLazFPDocFile read FStartFPDocFile write SetStartFPDocFile;
    property StartModuleOwner: TObject read FStartModuleOwner write SetStartModuleOwner;
  end;

function ShowFPDocLinkEditorDialog(SrcFilename: string;
  StartFPDocFile: TLazFPDocFile; out Link, LinkTitle: string): TModalResult;

function CompareFPDocLinkCompletionItem(Data1, Data2: Pointer): integer;
function ComparePathWithFPDocLinkCompletionItem(AnsiString1, Data2: Pointer): integer;

implementation

{$R *.lfm}

function ShowFPDocLinkEditorDialog(SrcFilename: string;
  StartFPDocFile: TLazFPDocFile; out Link, LinkTitle: string): TModalResult;
var
  FPDocLinkEditorDlg: TFPDocLinkEditorDlg;
begin
  Link:='';
  LinkTitle:='';
  FPDocLinkEditorDlg:=TFPDocLinkEditorDlg.Create(nil);
  try
    FPDocLinkEditorDlg.SetLinkAndContext(SrcFilename,LinkTitle,Link,StartFPDocFile);
    Result:=FPDocLinkEditorDlg.ShowModal;
    if Result=mrOk then begin
      Link:=FPDocLinkEditorDlg.Link;
      LinkTitle:=FPDocLinkEditorDlg.LinkTitle;
    end;
  finally
    FPDocLinkEditorDlg.Release;
  end;
end;

function CompareFPDocLinkCompletionItem(Data1, Data2: Pointer): integer;
var
  Item1: TFPDocLinkCompletionItem absolute Data1;
  Item2: TFPDocLinkCompletionItem absolute Data2;
begin
  Result:=SysUtils.CompareText(Item1.Text,Item2.Text);
end;

function ComparePathWithFPDocLinkCompletionItem(AnsiString1, Data2: Pointer
  ): integer;
var
  s: String;
  Item: TFPDocLinkCompletionItem absolute Data2;
begin
  s:=AnsiString(AnsiString1);
  Result:=SysUtils.CompareText(s,Item.Text);
end;

{ TFPDocLinkEditorDlg }

procedure TFPDocLinkEditorDlg.FormCreate(Sender: TObject);
begin
  Caption:=lisChooseAFPDocLink;
  LinkLabel.Caption:=lisLinkTarget;
  LinkLabel.Hint:=Format(lisExamplesIdentifierTMyEnumEnumUnitnameIdentifierPac,
                         [LineEnding, LineEnding, LineEnding, LineEnding]);
  TitleLabel.Caption:=lisTitleLeaveEmptyForDefault;
  
  LinkEdit.Text:='';
  TitleEdit.Text:='';

  // disable return key
  ButtonPanel1.OKButton.Default:=false;

  FItems:=TFPDocLinkCompletionList.Create;

  ActiveControl:=LinkEdit;
end;

procedure TFPDocLinkEditorDlg.FormDestroy(Sender: TObject);
begin
  FreeAndNil(fItems);
end;

procedure TFPDocLinkEditorDlg.CompletionBoxPaint(Sender: TObject);
begin
  fItems.BGColor:=clWindow;
  fItems.TextColor:=clWindowText;
  fItems.SelectedBGColor:=clHighlight;
  fItems.SelectedTextColor:=clHighlightText;
  fItems.ItemHeight:=CompletionBox.Canvas.TextHeight('ABCTWSMgqp')+4;
  fItems.VisibleItems:=CompletionBox.ClientHeight div fItems.ItemHeight;
  fItems.Draw(CompletionBox.Canvas,
              CompletionBox.ClientWidth,CompletionBox.ClientHeight);
end;

procedure TFPDocLinkEditorDlg.CompletionBoxMouseDown(Sender: TObject;
  Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
  Line: Integer;
begin
  if fItems.ItemHeight<=0 then exit;
  Line:=fItems.Top+(Y div fItems.ItemHeight);
  if Line>=fItems.Count then exit;
  Link:=FItems.Items[Line].Text;
  LinkEdit.SelStart:=length(LinkEdit.Text);
end;

procedure TFPDocLinkEditorDlg.LinkEditChange(Sender: TObject);
begin
  //DebugLn(['TFPDocLinkEditorDlg.LinkEditChange "',LinkEdit.Text,'"']);
  Link:=LinkEdit.Text;
end;

procedure TFPDocLinkEditorDlg.LinkEditKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
var
  Handled: Boolean;
begin
  if Shift=[] then begin
    Handled:=true;
    case Key of
    VK_UP:
      if FItems.Selected>0 then begin
        FItems.Selected:=FItems.Selected-1;
        if FItems.Top>fItems.Selected then
          FItems.Top:=fItems.Selected;
        CompletionBox.Invalidate;
      end;
    VK_DOWN:
      if FItems.Selected<fItems.Count-1 then begin
        FItems.Selected:=FItems.Selected+1;
        if FItems.Selected>=fItems.Top+fItems.VisibleItems then
          FItems.Top:=FItems.Top+1;
        CompletionBox.Invalidate;
      end;
    VK_RETURN:
      if (FItems.Selected>=0) and (FItems.Selected<fItems.Count) then begin
        Link:=FItems.Items[fItems.Selected].Text;
        LinkEdit.SelStart:=length(LinkEdit.Text);
      end;
    else
      Handled:=false;
    end;
    if Handled then Key:=VK_UNKNOWN;
  end;
end;

procedure TFPDocLinkEditorDlg.SetSourceFilename(const AValue: string);
var
  Owners: TFPList;
  i: Integer;
begin
  if FSourceFilename=AValue then exit;
  FSourceFilename:=AValue;
  FStartModuleOwner:=nil;
  Owners:=PackageEditingInterface.GetPossibleOwnersOfUnit(FSourceFilename,
    [piosfIncludeSourceDirectories]);
  if Owners=nil then exit;
  try
    for i:=0 to Owners.Count-1 do begin
      if TObject(Owners[i]) is TLazProject then begin
        FStartModuleOwner:=TLazProject(Owners[i]);
      end else if TObject(Owners[i]) is TLazPackage then begin
        if FStartModuleOwner=nil then
          FStartModuleOwner:=TLazPackage(Owners[i]);
      end;
    end;
  finally
    Owners.Free;
  end;
end;

procedure TFPDocLinkEditorDlg.SetStartModuleOwner(const AValue: TObject);
begin
  if FStartModuleOwner=AValue then exit;
  FStartModuleOwner:=AValue;
end;

procedure TFPDocLinkEditorDlg.UpdateCompletionBox;
{
  ToDo:
  empty  : show all packages, all units of current project/package and all identifiers of unit
  #l     : show all packages beginning with the letter l
  #lcl.  : show all units of package lcl
  f      : show all units and all identifiers beginning with the letter f
  forms. : show all identifiers of unit forms and all sub identifiers of identifier forms

  forms.tcontrol.        : show all sub identifiers of identifier tcontrol
  #lcl.forms.            : same as above
  #lcl.forms.tcontrol.   : same as above
}
var
  l: String;
begin
  if FItems=nil then exit;
  if fUpdatingItems then exit;
  fUpdatingItems:=true;
  try
    fItems.Clear;
    l:=FItems.Prefix;
    //DebugLn(['TFPDocLinkEditorDlg.UpdateCompletionBox Prefix="',l,'"']);
    AddSubIdentifiers(l);
    CompletionBox.Invalidate;
  finally
    fUpdatingItems:=false;
  end;
end;

procedure TFPDocLinkEditorDlg.AddPackagesToCompletion(Prefix: string);
var
  i: Integer;
  Pkg: TLazPackage;
begin
  for i:=0 to PackageGraph.Count-1 do begin
    Pkg:=PackageGraph.Packages[i];
    if Pkg.FPDocPaths='' then continue;
    if (SysUtils.CompareText(Prefix,copy(Pkg.Name,1,length(Prefix)))=0) then
      fItems.AddPackage(Pkg);
  end;
end;

procedure TFPDocLinkEditorDlg.AddModuleUnits(ModuleOwner: TObject;
  Prefix: string);
var
  AProject: TLazProject;
  APackage: TLazPackage;
begin
  DebugLn(['TFPDocLinkEditorDlg.AddModuleUnits ',DbgSName(ModuleOwner)]);
  if ModuleOwner=nil then exit;
  if ModuleOwner is TLazProject then begin
    AProject:=TLazProject(ModuleOwner);
    AddProjectUnits(AProject,Prefix);
  end else if ModuleOwner is TLazPackage then begin
    APackage:=TLazPackage(ModuleOwner);
    AddPackageUnits(APackage,Prefix);
  end;
end;

procedure TFPDocLinkEditorDlg.AddProjectUnits(AProject: TLazProject;
  Prefix: string);
var
  i: Integer;
  Filename: String;
  ProjFile: TLazProjectFile;
  Identifier: String;
begin
  DebugLn(['TFPDocLinkEditorDlg.AddProjectUnits ']);
  for i:=0 to AProject.FileCount-1 do begin
    ProjFile:=AProject.Files[i];
    if ProjFile.IsPartOfProject then begin
      Filename:=ProjFile.Filename;
      if FilenameIsPascalUnit(Filename) then begin
        Filename:=ExtractFileNameOnly(Filename);
        DebugLn(['TFPDocLinkEditorDlg.AddProjectUnits ',Prefix,' ',Filename]);
        if (CompareFilenames(Prefix,copy(Filename,1,length(Prefix)))=0) then
        begin
          Identifier:=ExtractFileNameOnly(ProjFile.Filename);
          if AProject<>StartModuleOwner then
            Identifier:='#'+ExtractFileNameOnly(AProject.ProjectInfoFile)+'.'+Identifier;
          fItems.Add(Identifier, lisProjectUnit);
        end;
      end;
    end;
  end;
end;

procedure TFPDocLinkEditorDlg.AddPackageUnits(APackage: TLazPackage;
  Prefix: string);
var
  i: Integer;
  PkgFile: TPkgFile;
  Filename: String;
  Identifier: String;
begin
  for i:=0 to APackage.FileCount-1 do begin
    PkgFile:=APackage.Files[i];
    Filename:=PkgFile.GetFullFilename;
    if FilenameIsPascalUnit(Filename) then begin
      Filename:=ExtractFileNameOnly(Filename);
      if (CompareFilenames(Prefix,copy(Filename,1,length(Prefix)))=0) then
      begin
        Identifier:=ExtractFileNameOnly(Filename);
        if APackage<>StartModuleOwner then
          Identifier:='#'+APackage.Name+'.'+Identifier;
        fItems.Add(Identifier, lisPackageUnit);
      end;
    end;
  end;
end;

procedure TFPDocLinkEditorDlg.AddIdentifiers(ModuleOwner: TObject;
  FPDocFile: TLazFPDocFile; Prefix: string);
var
  DOMNode: TDOMNode;
  ElementName: String;
  ModuleName: String;
begin
  if FPDocFile=nil then exit;
  //DebugLn(['TFPDocLinkEditorDlg.AddIdentifiers ',FPDocFile.Filename,' Prefix=',Prefix]);
  DOMNode:=FPDocFile.GetFirstElement;
  while DOMNode<>nil do begin
    if (DOMNode is TDomElement) then begin
      //DebugLn(['TFPDocLinkEditorDlg.AddIdentifiers ',DbgSName(DOMNode)]);
      ElementName:=TDomElement(DOMNode).GetAttribute('name');
      if (SysUtils.CompareText(Prefix,copy(ElementName,1,length(Prefix)))=0)
      then begin
        // same prefix
        if (FPDocFile<>nil) and (FPDocFile<>StartFPDocFile) then begin
          // different unit
          ElementName:=ExtractFileNameOnly(FPDocFile.Filename)+'.'+ElementName;
        end;
        if (ModuleOwner<>nil) and (ModuleOwner<>StartModuleOwner) then begin
          // different module
          if ModuleOwner is TLazProject then
            ModuleName:=lowercase(ExtractFileNameOnly(TLazProject(ModuleOwner).ProjectInfoFile))
          else if ModuleOwner is TLazPackage then
            ModuleName:=TLazPackage(ModuleOwner).Name
          else
            ModuleName:='';
          if ModuleName<>'' then
            ElementName:='#'+ModuleName+'.'+ElementName
          else
            ElementName:='';
        end;
        if ElementName<>'' then
          FItems.AddIdentifier(ElementName);
      end;
    end;
    DOMNode:=DOMNode.NextSibling;
  end;
end;

procedure TFPDocLinkEditorDlg.AddSubIdentifiers(Path: string);
var
  p: LongInt;
  Prefix: String;
  ModuleOwner: TObject;
  FPDocFile: TLazFPDocFile;
  DOMNode: TDOMNode;
  InvalidPath: integer;
  CacheWasUsed: boolean;
  DOMElement: TDOMElement;
begin
  p:=length(Path);
  while (p>0) and (Path[p]<>'.') do dec(p);
  if p<1 then begin
    // empty  : show all packages, all units of current project/package and all identifiers of unit
    // #l     : show all packages beginning with the letter l
    // f      : show all units and all identifiers beginning with the letter f
    if (Path='') or (Path[1]='#') then
      AddPackagesToCompletion(copy(Path,2,length(Path)));
    if (Path='') or (Path[1]<>'#') then begin
      AddModuleUnits(StartModuleOwner,Path);
      AddIdentifiers(StartModuleOwner,StartFPDocFile,Path);
    end;
  end else begin
    // sub identifier
    //DebugLn(['TFPDocLinkEditorDlg.AddSubIdentifiers searching context ..']);
    CodeHelpBoss.GetLinkedFPDocNode(StartFPDocFile,nil,Path,
      [chofUpdateFromDisk,chofQuiet],ModuleOwner,FPDocFile,DOMNode,InvalidPath,
      CacheWasUsed);
    // get rest path as filter
    Prefix:=copy(Path,InvalidPath,length(Path));
    if (Prefix<>'') and (Prefix[1]='.') then System.Delete(Prefix,1,1);
    //DebugLn(['TFPDocLinkEditorDlg.AddSubIdentifiers context found: ModuleOwner=',DbgSName(ModuleOwner),' FPDocFile=',FPDocFile<>nil,' DOMNode=',DOMNode<>nil,' invalid path="',Prefix,'"']);
    if DOMNode is TDomElement then begin
      // show elements of unit, beginning with prefix
      DOMElement:=TDomElement(DOMNode);
      Prefix:=DOMElement.GetAttribute('name')+'.'+Prefix;
      AddIdentifiers(ModuleOwner,FPDocFile,Prefix);
    end else if FPDocFile<>nil then begin
      // show elements of unit, beginning with prefix
      AddIdentifiers(ModuleOwner,FPDocFile,Prefix);
    end else if ModuleOwner<>nil then begin
      // show units of module, beginning with first part of prefix
      p:=1;
      while (p<=length(Prefix)) and (Prefix[p]<>'.') do inc(p);
      Prefix:=copy(Prefix,1,p-1);
      if ModuleOwner is TLazPackage then
        AddPackageUnits(TLazPackage(ModuleOwner),Prefix)
      else if ModuleOwner is TLazProject then
        AddProjectUnits(TLazProject(ModuleOwner),Prefix);
    end;
  end;
end;

procedure TFPDocLinkEditorDlg.SetLinkAndContext(const ASrcFilename, ATitle,
  ALink: string; ADocFile: TLazFPDocFile);
begin
  StartFPDocFile:=ADocFile;
  fSourceFilename:=ASrcFilename;
  LinkTitle:=ATitle;
  Link:=ALink;
  UpdateCompletionBox;
end;

function TFPDocLinkEditorDlg.GetLinkTitle: string;
begin
  Result:=TitleEdit.Text;
end;

procedure TFPDocLinkEditorDlg.SetStartFPDocFile(const AValue: TLazFPDocFile);
begin
  if FStartFPDocFile=AValue then exit;
  FStartFPDocFile:=AValue;
  FStartModuleOwner:=CodeHelpBoss.FindModuleOwner(FStartFPDocFile);
end;

function TFPDocLinkEditorDlg.GetLink: string;
begin
  Result:=LinkEdit.Text;
end;

procedure TFPDocLinkEditorDlg.SetLink(const AValue: string);
begin
  if FItems=nil then exit;
  if AValue=fItems.Prefix then exit;
  fItems.Prefix:=AValue;
  LinkEdit.Text:=AValue;
  UpdateCompletionBox;
end;

procedure TFPDocLinkEditorDlg.SetLinkTitle(const AValue: string);
begin
  TitleEdit.Text:=AValue;
end;

{ TFPDocLinkCompletionList }

function TFPDocLinkCompletionList.GetCount: integer;
begin
  Result:=FItems.Count;
end;

function TFPDocLinkCompletionList.GetItems(Index: integer
  ): TFPDocLinkCompletionItem;
begin
  Result:=TFPDocLinkCompletionItem(FItems[Index]);
end;

procedure TFPDocLinkCompletionList.SetSorted(const AValue: Boolean);
begin
  if FSorted=AValue then exit;
  if AValue then
    Sort
  else
    FSorted:=false;
end;

procedure TFPDocLinkCompletionList.SetTop(const AValue: integer);
begin
  if FTop=AValue then exit;
  FTop:=AValue;
end;

constructor TFPDocLinkCompletionList.Create;
begin
  FItems:=TFPList.Create;
  FTree:=TAvgLvlTree.Create(@CompareFPDocLinkCompletionItem);
end;

destructor TFPDocLinkCompletionList.Destroy;
begin
  Clear;
  FreeAndNil(FItems);
  FreeAndNil(FTree);
  inherited Destroy;
end;

procedure TFPDocLinkCompletionList.Clear;
var
  i: Integer;
begin
  FTree.Clear;
  for i:=0 to FItems.Count-1 do TObject(FItems[i]).Free;
  FItems.Clear;
  FSelected:=0;
  FTop:=0;
  FSorted:=true;
end;

procedure TFPDocLinkCompletionList.Sort;
var
  Node: TAvgLvlTreeNode;
  i: Integer;
begin
  if FSorted then exit;
  Node:=FTree.FindLowest;
  i:=0;
  while Node<>nil do begin
    FItems[i]:=Node.Data;
    inc(i);
    Node:=FTree.FindSuccessor(Node);
  end;
  FSorted:=true;
end;

procedure TFPDocLinkCompletionList.AddPackage(Pkg: TLazPackage);
begin
  Add('#'+Pkg.Name, Format(lisPackage2, [Pkg.IDAsString]));
end;

procedure TFPDocLinkCompletionList.Add(Identifier, Description: string);
var
  Item: TFPDocLinkCompletionItem;
begin
  if FTree.FindKey(Pointer(Identifier),
                   @ComparePathWithFPDocLinkCompletionItem)<>nil
  then exit;
  Item:=TFPDocLinkCompletionItem.Create(Identifier,Description);
  FItems.Add(Item);
  FTree.Add(Item);
  FSorted:=false;
end;

procedure TFPDocLinkCompletionList.AddIdentifier(Identifier: string);
begin
  Add(Identifier, lisIdentifier);
end;

procedure TFPDocLinkCompletionList.Draw(Canvas: TCanvas; Width, Height: integer);
var
  i: LongInt;
  y: Integer;
  dy: LongInt;
  Item: TFPDocLinkCompletionItem;
  s: String;
begin
  //DebugLn(['TFPDocLinkCompletionList.Draw ',Width,' ',Height,' Count=',Count]);
  Sorted:=true;
  i:=Top;
  y:=0;
  dy:=ItemHeight;
  while (y<Height) and (i<Count) do begin
    Item:=Items[i];
    Canvas.Brush.Style:=bsSolid;
    Canvas.Font.Style:=[];
    if i=Selected then begin
      Canvas.Brush.Color:=SelectedBGColor;
      Canvas.Font.Color:=SelectedTextColor;
    end else begin
      Canvas.Brush.Color:=BGColor;
      Canvas.Font.Color:=TextColor;
    end;
    Canvas.FillRect(0,y,Width,y+dy);
    s:=Item.Text;
    Canvas.TextOut(2,y+2,s);
    inc(y,dy);
    inc(i);
  end;
  if y<Height then begin
    Canvas.Brush.Color:=BGColor;
    Canvas.FillRect(0,y,Width,Height);
  end;
end;

{ TFPDocLinkCompletionItem }

constructor TFPDocLinkCompletionItem.Create(const AText, ADescription: string);
begin
  Text:=AText;
  Description:=ADescription;
end;

end.