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|
unit UHtmlToRtf;
interface
uses Classes, Math, ComCtrls;
procedure HTMLtoRTF(html: string; var rtf: TRichEdit);
implementation
uses RichEdit, Graphics, SysUtils, Generics.Collections;
type
TCharacterFormat = (CFM_Superscript, CFM_Subscript, CFM_Normal);
TPosiStyle = class
Font: TFont;
CharFmt: TCharacterFormat;
SelStart: Integer;
SelLength: Integer;
align : String;
IsPara : Boolean;
IsListe: Boolean;
NbTab : Integer;
destructor destroy; Override;
end;
TPosiStyleList = Class( TObjectList<TPosiStyle>)
public
function Add( aObj : TPosiStyle ) : Integer;
End;
TFontStack = class(TObjectList<TFont>)
public
procedure Pushfont( afont : TFont );
procedure popFont( aFont : TFont );
end;
procedure RE_SetCharFormat(RichEdit: TRichEdit; CharacterFormat: TCharacterFormat);
var
{The CHARFORMAT structure contains information about character formatting
in a rich edit control}
Format: TCharFormat;
begin
FillChar(Format, SizeOf(Format), 0);
with Format do
begin
cbSize := SizeOf(Format);
dwMask := CFM_OFFSET;
{Character offset, in twips, from the baseline. If the value of this member
is positive, the character is a superscript; if it is negative, the
character is a subscript}
case CharacterFormat of
CFM_Superscript: yOffset := 60;
CFM_Subscript: yOffset := -60;
CFM_Normal: yOffset := 0;
end;
end;
{The EM_SETCHARFORMAT message sets character formatting in a rich edit control.
SCF_SELECTION: Applies the formatting to the current selection}
Richedit.Perform(EM_SETCHARFORMAT, SCF_SELECTION, Longint(@Format));
end;
function StringToAlign( aVal : String ) : TAlignment;
begin
Result := taLeftJustify;
if Sametext( aVal, 'right' ) then
Result := taRightJustify
else
if Sametext( aVal, 'left' ) then
Result := taLeftJustify
else
if Sametext( aVal, 'center' ) then
Result := taCenter
end;
function GetTag(s: string; var i: Integer; var Tag, tagparams: string): Boolean;
var
a_tag: Boolean;
begin
GetTag := False;
Tag := '';
tagparams := '';
a_tag := False;
while i <= Length(s) do
begin
Inc(i);
// es wird nochein tag geöffnet --> das erste war kein tag;
if s[i] = '<' then
begin
GetTag := False;
Exit;
end;
if s[i] = '>' then
begin
GetTag := True;
Exit;
end;
if not a_tag then
begin
if s[i] = ' ' then
begin
if Tag <> '' then
a_tag := True;
end
else
Tag := Tag + s[i];
end
else
tagparams := tagparams + s[i];
end;
end;
procedure GetTagParams(tagparams: string; var params: TStringList);
var
i: Integer;
s: string;
gleich: Boolean;
InStartValue : Boolean;
startValchar : Char;
// kontrolliert ob nach dem zeichen bis zum nächsten zeichen ausser
// leerzeichen ein Ist-Gleich-Zeichen kommt
function notGleich(s: string; i: Integer): Boolean;
begin
notGleich := True;
while i <= Length(s) do
begin
Inc(i);
if s[i] = '=' then
begin
notGleich := False;
Exit;
end
else if s[i] <> ' ' then
Exit;
end;
end;
begin
params.Clear;
s := '';
InStartValue := false;
startValchar := ' ';
gleich := false;
for i := 1 to Length(tagparams) do
begin
if (tagparams[i] <> ' ') or InStartValue then
begin
if tagparams[i] <> '=' then
gleich := False;
if ( (tagparams[i] <> '''') and (tagparams[i] <> '"') ) then
s := s + tagparams[i];
if (tagparams[i] = '"') or (tagparams[i] = '''') then
begin
if not InStartValue then
startValchar := tagparams[i];
if startValchar = tagparams[i] then
InStartValue := not InStartValue;
end;
end
else
begin
if (notGleich(tagparams, i)) and (not gleich) then
begin
params.Add(s);
s := '';
end
else
gleich := True;
end;
end;
params.Add(s);
end;
function HtmlToColor(Color: string): TColor;
begin
Result := StringToColor('$' + Copy(Color, 6, 2) + Copy(Color, 4, 2) +
Copy(Color, 2, 2));
end;
procedure TransformSpecialChars(var s: string; i: Integer);
var
c: string;
z, z2: Byte;
i2: Integer;
const
nchars = 9;
chars: array [1 .. nchars, 1 .. 2] of string = (('Ö', 'Ö'), ('ö', 'ö'),
('Ä', 'Ä'), ('ä', 'ä'), ('Ü', 'Ü'), ('ü', 'ü'), ('ß', 'ß'), ('<', '<'),
('>', '>'));
begin
// Maximal die nächsten 7 zeichen auf sonderzeichen überprüfen
c := '';
i2 := i;
for z := 1 to 7 do
begin
c := c + s[i2];
for z2 := 1 to nchars do
begin
if chars[z2, 1] = c then
begin
Delete(s, i, Length(c));
Insert(chars[z2, 2], s, i);
Exit;
end;
end;
Inc(i2);
end;
end;
// HtmlTag Schriftgröße in pdf größe umwandeln
function CalculateRTFSize(pt: Integer): Integer;
begin
case pt of
1:
Result := 8;
2:
Result := 10;
3:
Result := 12;
4:
Result := 18;
5:
Result := 20;
6:
Result := 28;
7 :
Result := 36;
else
Result := 40;
end;
end;
procedure HTMLtoRTF(html: string; var rtf: TRichEdit);
var
aList : TPosiStyleList;
aFmt : TPosiStyle;
FontStack : TFontStack;
aParaList : TPosiStyleList;
aPara : TPosiStyle;
ParaStack : TList<TPosiStyle>;
aListeList : TPosiStyleList;
ListStack : TList<TPosiStyle>;
i, row: Integer;
cfont: TFont; { Standard ecriture }
Tag, tagparams: string;
params: TStringList;
wordwrap, liste: Boolean;
CarFmt : TCharacterFormat;
delta : Integer;
sTemp : String;
aALign : String;
NbTab : Integer;
begin
aList := TPosiStyleList.Create;
FontStack := TFontStack.Create;
aParaList := TPosiStyleList.Create;
ParaStack := TList<TPosiStyle>.Create;
aListeList := TPosiStyleList.Create;
ListStack := TList<TPosiStyle>.Create;
rtf.Lines.BeginUpdate;
rtf.Lines.Clear;
wordwrap := rtf.wordwrap;
rtf.WordWrap := False;
rtf.Lines.Add('');
Params := TStringList.Create;
cfont := TFont.Create;
cfont.Assign(rtf.Font);
FontStack.Pushfont( cfont );
i := 1;
row := 0;
Liste := False;
// Den eigentlichen Text holen und die Formatiorung merken
rtf.selstart := 0;
aALign := 'left';
CarFmt := CFM_Normal;//defaut
if Length(html) = 0 then Exit;
//*** Point de départ ***//
aFmt := TPosiStyle.Create;
aFmt.Font := TFont.Create;
aFmt.Font.Assign( cfont );
aFmt.SelStart := rtf.SelStart;
aFmt.IsListe := liste;
aFmt.CharFmt := CarFmt;
aList.Add( aFmt );
cfont.Assign(rtf.Font);
FontStack.Pushfont( cfont );
aPara := TPosiStyle.Create;
aPara.SelStart := rtf.SelStart;
aPara.align := aALign;
aParaList.Add( aPara );
ParaStack.Add(aPara);
aPara := TPosiStyle.Create;
aPara.SelStart := rtf.SelStart;
aPara.NbTab := 0;
aListeList.Add( aPara );
ListStack.Add(aPara);
repeat;
if html[i] = '<' then
begin
GetTag(html, i, Tag, tagparams);
GetTagParams(tagparams, params);
delta := 0;
// Das Font-Tag
if SameText(Tag,'FONT') then
begin
FontStack.Pushfont( cfont );
// Schrift auf fontstack sichern
if params.Values['size'] <> '' then
cfont.Size := CalculateRTFSize(StrToInt(params.Values['size']));
if params.Values['face'] <> '' then
cfont.Name := params.Values['face'];
if params.Values['color'] <> '' then cfont.Color := htmltocolor(params.Values['color']);
end
else
if SameText(Tag,'/FONT') then
begin
FontStack.popFont(cfont);
end
else
if SameText(Tag,'H1') then
begin
// Schrift auf fontstack sichern
FontStack.Pushfont( cfont );
cfont.Size := CalculateRTFSize(6);
cfont.Style := [fsBold];
end
else
if SameText(Tag, '/H1') then
begin
FontStack.popFont( cfont );
rtf.Lines.Add('');
Inc(delta);
Inc(row);
rtf.Lines.Add('');
Inc(row);
end
else // Die H-Tags-Überschriften
if SameText(Tag,'H2') then
begin
// Schrift auf fontstack sichern
FontStack.Pushfont( cfont );
cfont.Size := CalculateRTFSize(5);
cfont.Style := [fsBold];
end
else
if SameText(Tag, '/H2') then
begin
FontStack.popFont( cfont );
rtf.Lines.Add('');
Inc(delta);
Inc(row);
rtf.Lines.Add('');
Inc(row);
end
else // Die H-Tags-Überschriften
if SameText(Tag,'H3') then
begin
// Schrift auf fontstack sichern
FontStack.Pushfont( cfont );
cfont.Size := CalculateRTFSize(4);
cfont.Style := [fsBold];
end
else
if SameText(Tag, '/H3') then
begin
FontStack.popFont( cfont );
rtf.Lines.Add('');
Inc(delta);
Inc(row);
rtf.Lines.Add('');
Inc(row);
end
else // Die H-Tags-Überschriften
if SameText(Tag,'H4') then
begin
// Schrift auf fontstack sichern
FontStack.Pushfont( cfont );
cfont.Size := CalculateRTFSize(3);
cfont.Style := [fsBold];
end
else
if SameText(Tag, '/H4') then
begin
FontStack.popFont( cfont );
rtf.Lines.Add('');
Inc(delta);
Inc(row);
rtf.Lines.Add('');
Inc(row);
end
else // Die H-Tags-Überschriften
if SameText(Tag,'H5') then
begin
// Schrift auf fontstack sichern
FontStack.Pushfont( cfont );
cfont.Size := CalculateRTFSize(2);
cfont.Style := [fsBold];
end
else
if SameText(Tag, '/H5') then
begin
FontStack.popFont( cfont );
rtf.Lines.Add('');
Inc(row);
rtf.Lines.Add('');
Inc(row);
end
else // Die H-Tags-Überschriften
if SameText(Tag,'H6') then
begin
// Schrift auf fontstack sichern
FontStack.Pushfont( cfont );
cfont.Size := CalculateRTFSize(1);
cfont.Style := [fsBold];
end
else
if SameText(Tag, '/H6') then
begin
FontStack.popFont( cfont );
rtf.Lines.Add('');
Inc(delta);
Inc(row);
rtf.Lines.Add('');
Inc(row);
end
else
if SameText(Tag,'div') then
begin
if params.Values['align'] <> '' then
begin
aALign := params.Values['align'];
sTemp := StringReplace( rtf.Text,sLineBreak, #13, [rfReplaceAll] );
aPara := TPosiStyle.Create;
aPara.SelStart := Length(trim(sTemp)) + 1;
aPara.align := aALign;
aParaList.Add( aPara );
ParaStack.Add( aPara );
end;
end
else
if SameText(Tag,'/div') then
begin
aPara := ParaStack.Last;
ParaStack.Delete( ParaStack.Count - 1 );
aPara.SelLength := Length(trim(sTemp)) - aPara.SelStart;
end
else // Die H-Tags-Überschriften
if SameText(Tag,'B') or SameText(tag,'strong') then
begin
cfont.Style := cfont.Style + [fsbold];
end
else
if SameText(Tag,'/B') or SameText(tag,'/strong') then
begin
cfont.Style := cfont.Style - [fsbold];
end
else // Italic-Tag
if SameText(Tag,'I') or SameText(tag,'em') then
begin
cfont.Style := cfont.Style + [fsitalic];
end
else
if SameText(Tag,'/I') or SameText(tag,'/em') then
begin
cfont.Style := cfont.Style - [fsitalic];
end
else
if SameText(Tag,'U') then
begin
cfont.Style := cfont.Style + [fsunderline];
end
else
if SameText(Tag,'/U') then
begin
cfont.Style := cfont.Style - [fsunderline];
end
else // underline-Tag
if SameText( tag, 'UL') then
begin
liste := true;
Inc(NbTab );
sTemp := StringReplace( rtf.Text,sLineBreak, #13, [rfReplaceAll] );
aPara := TPosiStyle.Create;
aPara.SelStart := rtf.SelStart + 1;// Length(trim(sTemp));
aPara.NbTab := NbTab;
aListeList.Add( aPara );
ListStack.Add(aPara);
end
else
if SameText( tag, '/UL') then
begin
Dec(NbTab );
liste := false;
sTemp := StringReplace( rtf.Text,sLineBreak, #13, [rfReplaceAll] );
aPara := ListStack.Last;
aPara.SelLength := rtf.SelStart - aPara.SelStart;
ListStack.Delete( ListStack.Count - 1 );
if NbTab < 1 then
begin
rtf.Lines.Add('');
Inc(delta);
Inc(row);
rtf.Lines.Add('');
Inc(delta);
Inc(row);
end;
end
else
if SameText(Tag, 'BR') or SameText(Tag, 'BR/') or SameText(Tag, 'LI' ) then
begin
rtf.Lines.Add('');
Inc(row);
end
else
if SameText(tag, 'sub') then
CarFmt := CFM_Subscript
else
if SameText(tag, '/sub') then
CarFmt := CFM_Normal
else
if SameText(tag, 'sup') then
CarFmt := CFM_Superscript
else
if SameText(tag, '/sup') then
CarFmt := CFM_Normal;
// tag inconnus:
//else rtf.Lines[row]:=RTF.lines[row]+'<'+tag+' '+tagparams+'>';
sTemp := StringReplace( rtf.Text,sLineBreak, #13, [rfReplaceAll] );
aFmt := TPosiStyle.Create;
aFmt.Font := TFont.Create;
aFmt.Font.Assign( cfont );
aFmt.SelStart := Length(trim(sTemp)) + IfThen( Liste, 2, 0);
aFmt.IsListe := liste;
aFmt.CharFmt := CarFmt;
aFmt.NbTab := NbTab;
aList.Add( aFmt );
aFmt := aList[aList.Count - 2];
end
else
begin
// Spezialzeichen übersetzen
if html[i] = '&' then Transformspecialchars(html, i);
if (Ord(html[i]) <> 13) and (Ord(html[i]) <> 10) then
rtf.Lines[row] := RTF.Lines[row] + html[i];
end;
Inc(i);
until i >= Length(html);
//*** Fin ***///
rtf.Lines.Add('');
aFmt := TPosiStyle.Create;
aFmt.Font := TFont.Create;
aFmt.Font.Assign( cfont );
aFmt.SelStart := rtf.SelStart;
aFmt.IsListe := liste;
aFmt.CharFmt := CarFmt;
aList.Add( aFmt );
//*** Fin paragraphe ***//
sTemp := StringReplace( rtf.Text,sLineBreak, #13, [rfReplaceAll] );
aPara := ParaStack.Last;
aPara.SelLength := Length(trim(sTemp)) - aPara.SelStart;
sTemp := StringReplace( rtf.Text,sLineBreak, #13, [rfReplaceAll] );
aPara := ListStack.Last;
aPara.SelLength := Length(trim(sTemp)) - aPara.SelStart;
//*** Formatage du texte (on ne prend pas le fake dernier) ***//
for I := 0 to aList.Count - 2 do
begin
aFmt := aList[I];
rtf.SelStart := aFmt.SelStart;
rtf.SelLength := aFmt.SelLength;
rtf.SelAttributes.Style := aFmt.Font.Style;
rtf.SelAttributes.Size := aFmt.Font.Size;
rtf.SelAttributes.Color := aFmt.Font.Color;
rtf.SelAttributes.Name := aFmt.Font.Name;
RE_SetCharFormat(rtf, aFmt.CharFmt );
end;
for I := 0 to aListeList.Count - 1 do
begin
aPara := aListeList[I];
if aPara.NbTab < 1 then Continue;
rtf.SelStart := aPara.SelStart;
rtf.SelLength := aPara.SelLength;
rtf.Paragraph.Numbering := nsBullet;
rtf.Paragraph.FirstIndent := 20 * aPara.NbTab;
end;
for I := 0 to aParaList.Count - 1 do
begin
aPara := aParaList[I];
rtf.SelStart := aPara.SelStart;
rtf.SelLength := aPara.SelLength;
rtf.Paragraph.Alignment := StringToAlign( aPara.align );
end;
rtf.Lines.EndUpdate;
Params.Free;
cfont.Free;
rtf.WordWrap := wordwrap;
FreeAndNil( ParaStack );
FreeAndNil( ListStack );
FreeAndNil( FontStack );
FreeAndNil( aListeList );
FreeAndNil( aParaList );
FreeAndNil( aList );
end;
{ TFontStack }
procedure TFontStack.popFont(aFont: TFont);
begin
if Count > 0 then
begin
aFont.Assign( Last );
Delete(Count - 1 );
end;
end;
procedure TFontStack.Pushfont(afont: TFont);
var
tmpFnt : TFont;
begin
tmpFnt := TFont.Create;
tmpFnt.Assign( afont );
Add( tmpFnt );
end;
{ TPosiStyleList }
function TPosiStyleList.Add(aObj: TPosiStyle): Integer;
var
aLast : TPosiStyle;
begin
aLast := nil;
if Count > 0 then
aLast := Last;
if Assigned( aLast ) then
aLast.SelLength := aObj.SelStart - aLast.SelStart;
Result := Inherited Add( aObj );
end;
{ TPosiStyle }
destructor TPosiStyle.destroy;
begin
if Assigned( Font ) then
FreeAndNil( Font );
inherited;
end;
end. |
conversion html en rtf
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