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{
fpGUI - Free Pascal GUI Toolkit
Copyright (C) 2006 - 2010 See the file AUTHORS.txt, included in this
distribution, for details of the copyright.
See the file COPYING.modifiedLGPL, included in this distribution,
for details about redistributing fpGUI.
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.
Description:
Methods and classes for loading the translations/localizations.
}
unit fpg_translations;
{$mode objfpc}{$H+}
{.$Define DEBUG}
interface
uses
Classes
,SysUtils
,fpg_base
;
type
TTranslation = class(TObject)
private
FID: string;
public
property ID: string read FID;
end;
PTranslation = ^TTranslation;
TTranslationList = class(TObject)
private
FCount: integer;
FItems: PTranslation;
function GetItems(Index: integer): TTranslation;
public
destructor Destroy; override;
function IndexOf(const ID: string): integer;
procedure Add(const ID: string);
procedure Clear;
public
property Count: integer read FCount;
property Items[Index: integer]: TTranslation read GetItems; default;
end;
procedure TranslateResourceStrings(const BaseAppName, BaseDirectory, CustomLang: string);
function fpgMatchLocale(const ALanguageID: TfpgString): boolean;
implementation
uses
GetText
,fpg_pofiles
,fpg_utils
;
var
TranslationList: TTranslationList;
SystemLanguageID1: string = '';
SystemLanguageID2: string = '';
procedure CollectTranslations(const BaseAppName, BaseDir: string);
var
FileInfo: TSearchRec;
ID: string;
SearchMask: string;
begin
// search for all <BaseAppName>.xxx.po files
if TranslationList = nil then
TranslationList := TTranslationList.Create
else
TranslationList.Clear;
// add automatic and english translation
TranslationList.Add('');
TranslationList.Add('en');
// search existing translations
SearchMask := fpgAddTrailingValue(BaseDir, PathDelim, false) + BaseAppName + '.*.po';
//writeln('CollectTranslations ',SearchMask);
if SysUtils.FindFirst(SearchMask, faAnyFile, FileInfo) = 0
then begin
repeat
if (FileInfo.Name = '.') or (FileInfo.Name = '..') or (FileInfo.Name = '') then
Continue;
ID := copy(FileInfo.Name,length(BaseAppName + '.')+1,
length(FileInfo.Name)-length(BaseAppName + '..po'));
//writeln('CollectTranslations A ',FileInfo.Name,' ID=',ID);
if (ID <> '') and (Pos('.',ID) < 1) and (TranslationList.IndexOf(ID) < 0) then
begin
//writeln('CollectTranslations ID=',ID);
TranslationList.Add(ID);
end;
until SysUtils.FindNext(FileInfo) <> 0;
end;
SysUtils.FindClose(FileInfo);
end;
procedure TranslateResourceStrings(const BaseAppName, BaseDirectory, CustomLang: string);
const
Ext = '.%s.po';
var
Lang: string;
FallbackLang: string;
Dir: string;
begin
{$IFDEF DEBUG}
writeln('BaseAppName = ',BaseAppName);
writeln('BaseDirectory = ',BaseDirectory);
writeln('CustomLang = ',CustomLang);
{$ENDIF}
if TranslationList = nil then
CollectTranslations(BaseAppName, BaseDirectory);
if CustomLang = '' then
begin
Lang := SystemLanguageID1;
FallbackLang := SystemLanguageID2;
end
else
begin
Lang := CustomLang;
FallbackLang := '';
end;
// writeln('TranslateResourceStrings A Lang=',Lang,' FallbackLang=',FallbackLang);
Dir := fpgAddTrailingValue(BaseDirectory, PathDelim, false);
{$IFDEF DEBUG}
writeln('Lang = ' + Lang);
writeln('SystemLanguageID1 = ' + SystemLanguageID1);
writeln('SystemLanguageID2 = ' + SystemLanguageID2);
writeln('Translation file = ' +Dir + BaseAppName + Ext);
{$ENDIF}
// We use one translation file for all fpGUI Toolkit related text and one
// translation file for all fpGUI based application text
// if BaseAppName = 'fpgui' then
// TranslateUnitResourceStrings('',
// Dir + BaseAppName + Ext, Lang, FallbackLang)
// else
TranslateUnitResourceStrings('fake',
Dir + BaseAppName + Ext, Lang, FallbackLang);
end;
// Strip the '.' onwards part. eg: en_ZA.UTF-8 -> en_ZA
procedure FixLanguageIDs(var ALanguageID: TfpgString);
var
lpos: integer;
begin
lpos := Pos('.', ALanguageID);
if lpos > 0 then
ALanguageID := Copy(ALanguageID, 0, lpos-1);
end;
function fpgMatchLocale(const ALanguageID: TfpgString): boolean;
var
s: TfpgString;
begin
s := ALanguageID;
FixLanguageIDs(s);
Result := s = SystemLanguageID1;
if not Result then
Result := s = SystemLanguageID2;
end;
{ TTranslationList }
function TTranslationList.GetItems(Index: integer): TTranslation;
begin
Result := FItems[Index];
end;
destructor TTranslationList.Destroy;
begin
Clear;
inherited Destroy;
end;
procedure TTranslationList.Add(const ID: string);
var
NewTranslation: TTranslation;
begin
if IndexOf(ID)>=0 then
raise Exception.Create('TTranslationList.Add '
+ 'ID="' + ID + '" already exists.');
NewTranslation := TTranslation.Create;
NewTranslation.FID := ID;
inc(FCount);
ReallocMem(FItems, SizeOf(Pointer)*FCount);
FItems[FCount-1] := NewTranslation;
end;
function TTranslationList.IndexOf(const ID: string): integer;
begin
Result := FCount - 1;
while (Result >= 0) and (CompareText(ID, FItems[Result].ID) <> 0) do
dec(Result);
end;
procedure TTranslationList.Clear;
var
i: Integer;
begin
for i := 0 to FCount-1 do
FItems[i].Free;
FCount := 0;
ReallocMem(FItems, 0);
end;
initialization
TranslationList := nil;
GetLanguageIDs(SystemLanguageID1, SystemLanguageID2);
FixLanguageIDs(SystemLanguageID1);
finalization
TranslationList.Free;
TranslationList := nil;
end.
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