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{
*****************************************************************************
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
Copyright (C) <2005> <Andrew Haines> chmspecialparser.pas
}
unit ChmSpecialParser;
{$mode objfpc}{$H+}
interface
uses
Classes, Forms, SysUtils, Controls, ComCtrls, chmsitemap;
type
TContentTreeNode = class(TTreeNode)
private
fUrl: String;
public
property Url:String read fUrl write fUrl;
end;
TIndexItem = class(TListITem)
private
fUrl: String;
public
property Url:String read fUrl write fUrl;
end;
{ TContentsFiller }
TContentsFiller = class(TObject)
private
fTreeView: TTreeView;
fSitemap: TChmSiteMap;
fChm: TObject;
fBranchCount: DWord;
fStop: PBoolean;
fLastNode: TTreeNode;
procedure AddItem(AItem: TChmSiteMapItem; AParentNode: TTreeNode);
public
constructor Create(ATreeView: TTreeView; ASitemap: TChmSiteMap; StopBoolean: PBoolean; AChm: TObject);
procedure DoFill(ParentNode: TTreeNode);
end;
implementation
uses
LConvEncoding, LazUTF8, HTMLDefs;
function ToUTF8(const AText: AnsiString): String;
var
encoding: String;
begin
encoding := GuessEncoding(AText);
if (encoding <> EncodingUTF8) then
Result := ConvertEncoding(AText, encoding, EncodingUTF8)
else
Result := AText;
end;
function FixEscapedHTML(const AText: String): String;
var
AmpPos, i: Integer;
AmpStr: String;
ws: WideString;
Entity: WideChar;
begin
Result := '';
i := 1;
while i <= Length(AText) do
begin
if AText[i]='&' then
begin
AmpPos:= i;
repeat
inc(i); // First round passes beyond '&', then search for ';'.
until (i > Length(AText)) or (AText[i] = ';');
if i > Length(AText) then
// Not HTML Entity, only ampersand by itself. Copy the rest of AText at one go.
Result := Result + RightStr(AText, i-AmpPos)
else
begin // ';' was found, this may be an HTML entity like "&xxx;".
AmpStr := Copy(AText, AmpPos+1, i-AmpPos-1);
ws := UTF8Encode(AmpStr);
if ResolveHTMLEntityReference(ws, Entity) then
Result := Result + UnicodeToUTF8(cardinal(Entity))
else
Result := Result + '?';
end;
end
else
Result := Result + AText[i];
inc(i);
end;
end;
{ TForm1 }
// Replace %20 with space, \ with /
function FixURL(URL: String):String;
var
X: LongInt;
begin
X := Pos('%20', Url);
while X > 0 do
begin
Delete(Url, X, 3);
Insert(' ', Url, X);
X := Pos('%20', Url);
end;
Result := StringReplace(Url, '\', '/', [rfReplaceAll]);
end;
{ TContentsFiller }
procedure TContentsFiller.AddItem(AItem: TChmSiteMapItem; AParentNode: TTreeNode);
var
NewNode: TContentTreeNode;
X: Integer;
txt, URL: string;
begin
if fStop^ then Exit;
txt := AItem.KeyWord;
// Fallback:
if txt = '' then txt := AItem.Text;
txt := FixEscapedHTML(ToUTF8(Trim(txt)));
if not Assigned(fLastNode) or (fLastNode.Text <> txt) then
begin
// Add new child node
fLastNode := AParentNode;
NewNode := TContentTreeNode(fTreeView.Items.AddChild(AParentNode, txt));
{$IF FPC_FULLVERSION>=30200}
URL:='';
for x:=0 to AItem.SubItemcount-1 do
begin
URL:=AItem.SubItem[x].URL;
if URL<>'' then
break;
URL:=AItem.SubItem[x].Local;
if URL<>'' then
break;
end;
{$ELSE}
URL:=AItem.URL;
{$ENDIF}
NewNode.Url := FixURL('/'+URL);
NewNode.Data := fChm;
if fTreeView.Images <> nil then
begin
NewNode.ImageIndex := 3;
NewNode.SelectedIndex := 3;
if (AParentNode.ImageIndex < 0) or (AParentNode.ImageIndex > 2) then
begin
AParentNode.ImageIndex := 1;
AParentNode.SelectedIndex := 1;
end;
end;
end
else
NewNode := TContentTreeNode(fLastNode);
Inc(fBranchCount);
if fBranchCount mod 200 = 0 then
Application.ProcessMessages;
for X := 0 to AItem.Children.Count-1 do
AddItem(AItem.Children.Item[X], NewNode);
end;
constructor TContentsFiller.Create(ATreeView: TTreeView; ASitemap: TChmSiteMap; StopBoolean: PBoolean; AChm: TObject);
begin
inherited Create;
fTreeView := ATreeView;
fSitemap := ASitemap;
fStop := StopBoolean;
fChm := AChm;
end;
procedure TContentsFiller.DoFill(ParentNode: TTreeNode);
var
X: Integer;
begin
fTreeView.BeginUpdate;
for X := 0 to fSitemap.Items.Count-1 do
AddItem(fSitemap.Items.Item[X], ParentNode);
fTreeView.EndUpdate;
end;
end.
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