| 1 | unit TargetJavascript;
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| 2 |
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| 3 | interface
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| 4 |
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| 5 | uses
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| 6 | Classes, SysUtils, FileUtil, Target, BFTarget, Dialogs, LazFileUtils,
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| 7 | Process, LCLIntf;
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| 8 |
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| 9 | type
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| 10 |
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| 11 | { TTargetJavascript }
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| 12 |
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| 13 | TTargetJavascript = class(TBFTarget)
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| 14 | private
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| 15 | function GetMemoryCell: string;
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| 16 | public
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| 17 | WithHtml: Boolean;
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| 18 | constructor Create; override;
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| 19 | procedure Compile; override;
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| 20 | procedure CompileHtml;
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| 21 | procedure Run; override;
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| 22 | end;
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| 23 |
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| 24 |
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| 25 | implementation
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| 26 |
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| 27 | { TTargetJavascript }
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| 28 |
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| 29 | constructor TTargetJavascript.Create;
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| 30 | begin
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| 31 | inherited;
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| 32 | FName := 'Javascript';
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| 33 | FSourceExtension := '.js';
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| 34 | FImageIndex := 28;
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| 35 | FCapabilities := [tcCompile, tcRun];
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| 36 | CompilerPath := '';
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| 37 | FCompiledExtension := '';
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| 38 | end;
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| 39 |
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| 40 | function TTargetJavascript.GetMemoryCell: string;
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| 41 | begin
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| 42 | Result := 'Memory[Pos';
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| 43 | if FProgram[FProgramIndex].RelIndex > 0 then
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| 44 | Result := Result + ' + ' + IntToStr(FProgram[FProgramIndex].RelIndex)
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| 45 | else if FProgram[FProgramIndex].RelIndex < 0 then
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| 46 | Result := Result + ' - ' + IntToStr(Abs(FProgram[FProgramIndex].RelIndex));
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| 47 | Result := Result + ']';
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| 48 | end;
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| 49 |
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| 50 | procedure TTargetJavascript.Compile;
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| 51 | begin
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| 52 | inherited;
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| 53 | Indent := 0;
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| 54 | FTargetCode := '';
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| 55 |
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| 56 | AddLine('var Memory = new Array(' + IntToStr(MemorySize) + ').fill(0);');
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| 57 | AddLine('var Pos = 0;');
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| 58 | AddLine;
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| 59 | FProgramIndex := 0;
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| 60 | while FProgramIndex < FProgram.Count do begin
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| 61 | case FProgram[FProgramIndex].Command of
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| 62 | cmPointerInc: AddLine('Pos = Pos + ' + IntToStr(FProgram[FProgramIndex].Parameter) + ';');
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| 63 | cmPointerDec: AddLine('Pos = Pos - ' + IntToStr(FProgram[FProgramIndex].Parameter) + ';');
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| 64 | cmInc: AddLine(GetMemoryCell + ' = ' + GetMemoryCell + ' + ' + IntToStr(FProgram[FProgramIndex].Parameter) + ';');
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| 65 | cmDec: AddLine(GetMemoryCell + ' = ' + GetMemoryCell + ' - ' + IntToStr(FProgram[FProgramIndex].Parameter) + ';');
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| 66 | cmOutput: AddLine('document.getElementById("main").innerHTML += String.fromCharCode(' + GetMemoryCell + ');');
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| 67 | cmInput: ; //AddLine(GetMemoryCell + ' = getchar();');
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| 68 | cmSet: AddLine(GetMemoryCell + ' = ' + IntToStr(FProgram[FProgramIndex].Parameter) + ';');
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| 69 | cmMultiply: AddLine(GetMemoryCell + ' = ' + GetMemoryCell + ' + Memory[Pos] * ' + IntToStr(FProgram[FProgramIndex].Parameter) + ';');
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| 70 | cmLoopStart: begin
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| 71 | AddLine('while(' + GetMemoryCell + ' != 0)');
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| 72 | AddLine('{');
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| 73 | Inc(Indent);
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| 74 | end;
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| 75 | cmLoopEnd: begin
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| 76 | Dec(Indent);
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| 77 | AddLine('}');
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| 78 | end;
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| 79 | end;
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| 80 | Inc(FProgramIndex);
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| 81 | end;
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| 82 | CompileToFile;
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| 83 | CompileHtml;
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| 84 | end;
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| 85 |
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| 86 | procedure TTargetJavascript.CompileHtml;
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| 87 | var
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| 88 | HtmlFile: string;
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| 89 | begin
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| 90 | with TStringList.Create do
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| 91 | try
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| 92 | Text := '<!DOCTYPE html>' + LineEnding +
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| 93 | '<html>' + LineEnding +
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| 94 | '<body>' + LineEnding +
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| 95 | '<pre id="main"></pre>' + LineEnding +
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| 96 | '<script type="text/javascript" src="' + ExtractFileNameOnly(ProjectFileName) + SourceExtension + '"></script>' + LineEnding +
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| 97 | '</body>' + LineEnding +
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| 98 | '</html>';
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| 99 | HtmlFile := ExtractFilePath(ProjectFileName) +
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| 100 | CompiledDir + DirectorySeparator + Name + DirectorySeparator +
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| 101 | ExtractFileNameOnly(ProjectFileName) + '.html';
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| 102 | ForceDirectories(ExtractFilePath(HtmlFile));
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| 103 | SaveToFile(HtmlFile);
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| 104 | finally
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| 105 | Free;
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| 106 | end;
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| 107 | end;
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| 108 |
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| 109 | procedure TTargetJavascript.Run;
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| 110 | var
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| 111 | HtmlFile: string;
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| 112 | begin
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| 113 | inherited;
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| 114 | HtmlFile := ExtractFilePath(ProjectFileName) +
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| 115 | CompiledDir + DirectorySeparator + Name + DirectorySeparator +
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| 116 | ExtractFileNameOnly(ProjectFileName) + '.html';
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| 117 |
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| 118 | if FileExists(HtmlFile) then OpenURL(HtmlFile);
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| 119 | end;
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| 120 |
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| 121 | end.
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| 122 |
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