0linux/spackgui/frmsearch.pas

{
********************************************************************************

SPackGui
Copyright (C) 2012-2013 Geoffray Levasseur <geoffray.levasseurbrandin@numericable.fr>.
Copyright (C) <date> <add your name and mail address here>

http://www.geoffray-levasseur.org/
http://0.tuxfamilly.org/

This software is governed by the CeCILL license under French law and
abiding by the rules of distribution of free software.  You can  use,
modify and/ or redistribute the software under the terms of the CeCILL
license as circulated by CEA, CNRS and INRIA at the following URL
"http://www.cecill.info".

As a counterpart to the access to the source code and  rights to copy,
modify and redistribute granted by the license, users are provided only
with a limited warranty  and the software's author,  the holder of the
economic rights,  and the successive licensors  have only  limited
liability.

In this respect, the user's attention is drawn to the risks associated
with loading,  using,  modifying and/or developing or reproducing the
software by the user in light of its specific status of free software,
that may mean  that it is complicated to manipulate,  and  that  also
therefore means  that it is reserved for developers  and  experienced
professionals having in-depth computer knowledge. Users are therefore
encouraged to load and test the software's suitability as regards their
requirements in conditions enabling the security of their systems and/or
data to be ensured and,  more generally, to use and operate it in the
same conditions as regards security.

The fact that you are presently reading this means that you have had
knowledge of the CeCILL license and that you accept its terms.

********************************************************************************

Description:
  search dialog

}
unit frmSearch;

{$mode objfpc}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
  Buttons, ComCtrls, uCommon, uSpackPackage;

type

  { TfSearch }

  TfSearch = class(TForm)
    btnClose: TBitBtn;
    btnSearch: TBitBtn;
    btnRegExprHelp: TButton;
    cbxSearch: TComboBox;
    ckbToUpgrade: TCheckBox;
    ckbNotInstalle: TCheckBox;
    ckbInstalled: TCheckBox;
    ckbDescription: TCheckBox;
    ckbPackageName: TCheckBox;
    ckbWholeWord: TCheckBox;
    ckbCaseSensitive: TCheckBox;
    ckbRegExpr: TCheckBox;
    gbOptions: TGroupBox;
    gbWhere: TGroupBox;
    lbSearch: TLabel;
    procedure btnCloseClick(Sender: TObject);
    procedure btnRegExprHelpClick(Sender: TObject);
    procedure btnSearchClick(Sender: TObject);
    procedure cbxSearchChange(Sender: TObject);
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure lvSearchResultChange(Sender: TObject; Item: TListItem; Change: TItemChange);
    procedure lvSearchResultColumnClick(Sender: TObject; Column: TListColumn);
    procedure lvSearchResultCompare(Sender: TObject; Item1, Item2: TListItem; Data: Integer; var Compare: Integer);
  private
    { private declarations }
    FSearchTerms: TStringList;
    FLastSortedColumn: Integer;
    FAscending: Boolean;
    procedure ParseString(const Str: string);
    procedure SearchTerm(const Pkg: TSPackPackage);
    function TestField(const ASearch, AField: string): Boolean;
  public
    { public declarations }
  end;

var
  fSearch: TfSearch;

implementation

uses
  LCLType, uStrings, frmMain, uIconManager, uDebug;

{$R *.lfm}

{ TfSearch }

procedure TfSearch.ParseString(const Str: string);
var
  I, N: Integer;
  InBrace: Boolean;
begin
  if Length(Str) < 1 then
    Exit; //cannot parse an empty string
  FSearchTerms.Clear;
  N := FSearchTerms.Add('');
  InBrace := False;
  for I := 1 to Length(Str) do
  begin
    if (Str[I] = '"') and ckbRegExpr.Checked then
    begin
      InBrace := not InBrace;
      Continue;
    end;
    if (Str[I] = ' ') and (not InBrace) then
      if FSearchTerms[N] <> '' then //in case of several successive spaces
        N := FSearchTerms.Add('')
      else
    else
      FSearchTerms[N] := FSearchTerms[N] + Str[I];
  end;
end;

function TfSearch.TestField(const ASearch, AField: string): Boolean;
var
  N: Integer;
begin
  N := Pos(ASearch, AField);
  if N <> 0 then
  begin //many if so begin is put to clarify even if it's not needed
    if ckbWholeWord.Checked then
    begin
      //we use if here as in those statement the second term is not evaluated
      //when the first one is set to false : we can't have a range check error
      //as the second test is done only if the first one return true
      //if we use Result := test1 and test2 both tests are alwais evaluated and
      //will result in range checking error in some cases (match at end or
      //beginning of a string)
      if (N + Length(ASearch) <= Length(AField)) and
         (AField[N + Length(ASearch)] <> ' ') then
        Result := False
      else
        if (N > 1) and (AField[N - 1] <> ' ') then
          Result := False
        else
          Result := True;
    end else
      Result := True;
  end else
    Result := False;
end;

procedure TfSearch.SearchTerm(const Pkg: TSPackPackage);
begin
  //do it
end;

procedure TfSearch.btnRegExprHelpClick(Sender: TObject);
begin
  Application.MessageBox(PChar(rsRegExprHelp), PChar(rsHelp),
    MB_ICONINFORMATION + MB_OK);
end;

procedure TfSearch.btnSearchClick(Sender: TObject);
var
  I: integer;
begin
  cbxSearch.Items.Add(cbxSearch.Text);
  if Trim(cbxSearch.Text) = '' then
    Exit;
  Cursor := crHourGlass;
  ParseString(Trim(cbxSearch.Text)); //put each term in a stringlist
  if ckbRegExpr.Checked and ((Trim(FSearchTerms[0])[1] in RegExprOperator) or
    (Trim(FSearchTerms[FSearchTerms.Count - 1])[1] in RegExprOperator)) then
  begin
    MessageDlg(rsErrorSearchSynthax,  mtError, [MBOK], 0);
    Exit;
  end;
  try
    for I := 0 to fMain.PackageList.Count - 1 do
    begin
      Application.ProcessMessages;
      SearchTerm(fMain.PackageList.Packages[I]);
    end;
    //Sort(lvSearchResult, 0, False);
  finally
    Cursor := crArrow;
  end;
end;

procedure TfSearch.cbxSearchChange(Sender: TObject);
begin
  btnSearch.Enabled := (ckbPackageName.Checked or ckbDescription.Checked) and
    (Trim(cbxSearch.Text) <> '');
end;

procedure TfSearch.FormClose(Sender: TObject; var CloseAction: TCloseAction);
var
  I: Integer;
begin
  try
    SaveWindowGeometry(Self);
    IniWriteStrings(iniMain, Self.Name, rsConfNameFindHistory, cbxSearch.Items);
  except
    PrintLnDbg(rsErrorCannotSaveConf, vlLow);
  end;
end;

procedure TfSearch.FormCreate(Sender: TObject);
begin
  FSearchTerms := TStringList.Create;
  btnSearch.Enabled := False;
  //next line is needed because of different metrics with fonts and/or widget sets
  {$IFDEF LCLGTK2 OR $IFDEF LCLGTK3}
  btnRegExprHelp.Left := ckbRegExpr.Left + ckbRegExpr.Width + 1;
  btnRegExprHelp.Top := ckbRegExpr.Top;
  btnRegExprHelp.Height := ckbRegExpr.Height;
  {$ENDIF}
  {$IFDEF LCLQT OR $IFDEF LCLQT5}
  btnRegExprHelp.Left := ckbRegExpr.Left + ckbRegExpr.Width + 21;
  btnRegExprHelp.Top := ckbRegExpr.Top + 1;
  btnRegExprHelp.Height := ckbRegExpr.Height + 1;
  {$ENDIF} //other widget sets not tested so left as designed
  btnRegExprHelp.Width := ckbRegExpr.Height;
  btnSearch.Tag := icSearch;
  btnClose.Tag := icClose;
  InitBtnGlyphs(Self);
  cbxSearch.Text := '';
  LoadWindowGeometry(Self);
  IniReadStrings(iniMain, Self.Name, rsConfNameFindHistory, cbxSearch.Items);
  ckbPackageName.Checked := True;
  ckbDescription.Checked := True;
  ckbInstalled.Checked := True;
  ckbNotInstalle.Checked := True;
  ckbToUpgrade.Checked := True;
end;

procedure TfSearch.FormDestroy(Sender: TObject);
begin
  try
    FSearchTerms.Free;
  finally
    inherited;
  end;
end;

procedure TfSearch.lvSearchResultChange(Sender: TObject; Item: TListItem; Change: TItemChange);
begin
end;

procedure TfSearch.lvSearchResultColumnClick(Sender: TObject;
  Column: TListColumn);
begin
  TListView(Sender).SortType := stNone;
  if Column.Index = FLastSortedColumn then
    FAscending := not FAscending
  else
    FLastSortedColumn := Column.Index;
  TListView(Sender).SortColumn := Column.Index;
  TListView(Sender).SortType := stData;
end;

procedure TfSearch.lvSearchResultCompare(Sender: TObject;
  Item1, Item2: TListItem; Data: Integer; var Compare: Integer);
begin
  case FLastSortedColumn of
    0: Compare := AnsiCompareText(Item1.Caption, Item2.Caption);
    1: Compare := CompareVersion(Item1.SubItems[0], Item2.SubItems[0]);
    2: Compare := CompareVersion(Item1.SubItems[1], Item2.SubItems[1]);
    3: Compare := fMain.CompareSize(Item1.SubItems[2], Item2.SubItems[2]);
    4: Compare := fMain.CompareSize(Item1.SubItems[3], Item2.SubItems[3]);
    5: Compare := AnsiCompareText(Item1.SubItems[4], Item2.SubItems[4]);
  end;
  if not FAscending then
    Compare := -Compare;
end;

procedure TfSearch.btnCloseClick(Sender: TObject);
begin
  Close;
end;

end.