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Some random server versions have duplicated category names in help tables, which cause infinite tree recursion in help tree, e.g. for "Polygon properties" > "Contents". Do not display these duplicates as folder to avoid infinite recursion. Fixes issue #2135.

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This commit is contained in:
Ansgar Becker
2010-08-26 00:02:10 +00:00
parent 961f7f0f3f
commit a64b9412ef
1 changed files with 23 additions and 9 deletions
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32
source/sqlhelp.pas
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@ -214,19 +214,33 @@ procedure TfrmSQLhelp.treeTopicsInitNode(Sender: TBaseVirtualTree; ParentNode,
Node: PVirtualNode; var InitialStates: TVirtualNodeInitStates);
var
Results: TMySQLQuery;
Folder: String;
ThisFolder, PrevFolder: String;
N: PVirtualNode;
VT: TVirtualStringTree;
RecursionAlarm: Boolean;
begin
// Display plus button for nodes which are folders
VT := Sender as TVirtualStringTree;
Results := GetHelpResult(Node);
Results.RecNo := Node.Index;
Folder := '';
if Assigned(ParentNode) then
Folder := treeTopics.Text[ParentNode, treeTopics.Header.MainColumn];
if Results.ColExists('is_it_category')
and (Results.Col('is_it_category') = 'Y')
and (Results.Col('name') <> Folder)
then
Include(InitialStates, ivsHasChildren);
if Results.Col('is_it_category', True) = 'Y' then begin
// Some random server versions have duplicated category names in help tables, which would cause
// infinite tree recursion, e.g. for "Polygon properties" > "Contents". Do not display these
// duplicates as folder
RecursionAlarm := False;
ThisFolder := Results.Col('name');
N := VT.GetPreviousInitialized(Node);
while Assigned(N) do begin
PrevFolder := VT.Text[N, VT.Header.MainColumn];
if VT.HasChildren[N] and ((ThisFolder=PrevFolder) or (ThisFolder='Contents')) then begin
RecursionAlarm := True;
break;
end;
N := VT.GetPreviousInitialized(N);
end;
if not RecursionAlarm then
Include(InitialStates, ivsHasChildren);
end;
end;