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{
Methods and classes for loading the translations/localizations.
}
unit gfx_translations;
{$mode objfpc}{$H+}
{.$Define DEBUG}
interface
uses
Classes
,SysUtils
;
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);
implementation
uses
GetText
,gfx_pofiles
,gfx_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
lpos: integer;
begin
lpos := Pos('.', SystemLanguageID1);
if lpos > 0 then
SystemLanguageID1 := Copy(SystemLanguageID1, 0, lpos-1);
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;
finalization
TranslationList.Free;
TranslationList := nil;
end.
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