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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 27 | daniel-mar | 1 | unit FastPHPTreeView; |
| 2 | |||
| 3 | interface |
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| 4 | |||
| 5 | uses |
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| 6 | SysUtils, Classes, ComCtrls; |
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| 7 | |||
| 8 | (* |
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| 9 | |||
| 10 | <FastPHPData> ::= <FastPHPData100> . |
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| 11 | |||
| 12 | Version 1.00: |
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| 13 | <FastPHPData100> ::= "FAST100!" (<Nodes> <Exit> | <Exit>) . |
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| 14 | <Nodes> ::= <Node> | <Nodes> <Node> . |
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| 15 | <Node> ::= <LeafNode> | <LeafNode> <IncreaseLevel> <Nodes> <DecreaseLevel> . |
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| 31 | daniel-mar | 16 | <LeafNode> ::= "N" <Icon(8)> <LineNo(8)> <DescLen(4)> <Desc(Utf8)> . |
| 27 | daniel-mar | 17 | <IncreaseLevel> ::= "I" . |
| 18 | <DecreaseLevel> ::= "D" . |
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| 19 | <Exit> ::= "X" . |
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| 20 | |||
| 21 | *) |
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| 22 | |||
| 23 | type |
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| 24 | TTreeViewFastPHP = class helper for TTreeView |
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| 25 | private |
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| 26 | //FPrevFastPHPData: string; |
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| 27 | class function Read(var ptr: PChar; len: integer): string; inline; |
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| 28 | procedure Rec100(tn: TTreeNode; var ptr: PChar); |
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| 29 | protected |
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| 30 | procedure DoFillWithFastPHPData(ptr: PChar); |
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| 31 | public |
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| 32 | procedure FillWithFastPHPData(data: string); |
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| 33 | end; |
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| 34 | |||
| 35 | EFastNodeException = class(Exception); |
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| 36 | |||
| 37 | implementation |
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| 38 | |||
| 39 | uses |
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| 40 | StrUtils; |
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| 41 | |||
| 42 | const |
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| 43 | LEN_MAGIC = 8; |
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| 28 | daniel-mar | 44 | LEN_ICON = 8; |
| 27 | daniel-mar | 45 | LEN_LINENO = 8; |
| 46 | LEN_DESCLEN = 4; |
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| 47 | |||
| 48 | procedure TTreeViewFastPHP.DoFillWithFastPHPData(ptr: PChar); |
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| 49 | var |
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| 50 | s: String; |
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| 51 | tn, tmp: TTreeNode; |
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| 52 | expanded: TStringList; |
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| 53 | selected, magic: string; |
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| 54 | i: integer; |
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| 55 | begin |
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| 56 | selected := ''; |
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| 57 | expanded := TStringList.Create; |
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| 58 | Self.Items.BeginUpdate; |
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| 59 | try |
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| 60 | {$REGION 'Remember our current state (selected and expanded flags)'} |
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| 61 | for i := 0 to Self.Items.Count-1 do |
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| 62 | begin |
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| 63 | tn := Self.Items.Item[i]; |
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| 64 | s := tn.Text; |
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| 65 | tmp := tn.Parent; |
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| 66 | while tmp <> nil do |
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| 67 | begin |
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| 68 | s := tmp.Text + #0 + s; |
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| 69 | tmp := tmp.Parent; |
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| 70 | end; |
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| 71 | if tn.Selected then selected := s; |
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| 72 | if tn.Expanded and tn.HasChildren then expanded.Add(s); |
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| 73 | end; |
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| 74 | {$ENDREGION} |
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| 75 | |||
| 76 | {$REGION 'Update the treeview'} |
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| 77 | Self.Items.Clear; |
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| 78 | magic := Read(ptr, LEN_MAGIC); |
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| 79 | if magic = 'FAST100!' then |
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| 80 | Rec100(nil, ptr) |
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| 81 | else |
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| 82 | raise EFastNodeException.CreateFmt('FastNode version "%s" not supported.', [magic]); |
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| 83 | {$ENDREGION} |
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| 84 | |||
| 85 | {$REGION 'Recover the previous current state (selected and expanded flags)'} |
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| 86 | for i := 0 to Self.Items.Count-1 do |
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| 87 | begin |
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| 88 | tn := Self.Items.Item[i]; |
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| 89 | s := tn.Text; |
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| 90 | tmp := tn.Parent; |
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| 91 | while tmp <> nil do |
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| 92 | begin |
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| 93 | s := tmp.Text + #0 + s; |
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| 94 | tmp := tmp.Parent; |
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| 95 | end; |
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| 96 | if selected = s then tn.Selected := true; |
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| 97 | if expanded.IndexOf(s) >= 0 then tn.Expand(false); |
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| 98 | end; |
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| 99 | {$ENDREGION} |
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| 100 | finally |
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| 101 | expanded.Free; |
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| 102 | Self.Items.EndUpdate; |
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| 103 | end; |
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| 104 | end; |
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| 105 | |||
| 106 | procedure TTreeViewFastPHP.FillWithFastPHPData(data: string); |
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| 107 | begin |
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| 108 | //if FPrevFastPHPData = data then exit; |
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| 109 | //FPrevFastPHPData := data; |
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| 110 | |||
| 111 | data := Trim(data); |
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| 112 | if not EndsStr('X', data) then raise EFastNodeException.Create('FastNode string must end with "X"'); |
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| 113 | |||
| 114 | DoFillWithFastPHPData(PChar(data)); |
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| 115 | end; |
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| 116 | |||
| 117 | class function TTreeViewFastPHP.Read(var ptr: PChar; len: integer): string; |
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| 118 | begin |
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| 119 | result := Copy(string(ptr), 1, len); |
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| 120 | inc(ptr, len); |
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| 121 | end; |
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| 122 | |||
| 123 | procedure TTreeViewFastPHP.Rec100(tn: TTreeNode; var ptr: PChar); |
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| 124 | var |
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| 28 | daniel-mar | 125 | typ, icon, lineno, len, caption: string; |
| 27 | daniel-mar | 126 | lastTn: TTreeNode; |
| 127 | begin |
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| 128 | try |
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| 129 | lastTn := nil; |
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| 130 | while true do |
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| 131 | begin |
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| 132 | repeat |
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| 133 | typ := Read(ptr, 1); |
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| 134 | until Trim(typ) <> ''; |
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| 135 | if typ = 'N' then // new node |
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| 136 | begin |
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| 28 | daniel-mar | 137 | icon := Read(ptr, LEN_ICON); |
| 27 | daniel-mar | 138 | lineno := Read(ptr, LEN_LINENO); |
| 28 | daniel-mar | 139 | len := Read(ptr, LEN_DESCLEN); |
| 31 | daniel-mar | 140 | caption := Utf8Decode(Read(ptr, StrToInt(len))); |
| 27 | daniel-mar | 141 | if tn = nil then |
| 142 | lastTn := Self.Items.Add(nil, caption) |
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| 143 | else |
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| 144 | lastTn := Self.Items.AddChild(tn, caption); |
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| 145 | lastTn.Data := Pointer(StrToInt(lineno)); // TODO: is this good? |
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| 146 | end |
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| 147 | else if typ = 'I' then // increase level |
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| 148 | begin |
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| 149 | if LastTn = nil then raise EFastNodeException.Create('Fast100: Increase command requires previous node'); |
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| 150 | Rec100(lastTn, ptr); |
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| 151 | end |
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| 152 | else if typ = 'D' then Exit // decrease level |
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| 153 | else if typ = 'X' then Abort // exit |
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| 154 | else raise EFastNodeException.CreateFmt('Fast100: Command "%s" unknown', [typ]); |
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| 155 | end; |
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| 156 | except |
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| 157 | on E: EAbort do |
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| 158 | exit |
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| 159 | else |
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| 160 | raise; |
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| 161 | end; |
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| 162 | end; |
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| 163 | |||
| 164 | end. |