Rev 31 | Rev 34 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 27 | daniel-mar | 1 | unit FastPHPTreeView; |
| 2 | |||
| 3 | interface |
||
| 4 | |||
| 5 | uses |
||
| 6 | SysUtils, Classes, ComCtrls; |
||
| 7 | |||
| 8 | (* |
||
| 9 | |||
| 10 | <FastPHPData> ::= <FastPHPData100> . |
||
| 11 | |||
| 12 | Version 1.00: |
||
| 13 | <FastPHPData100> ::= "FAST100!" (<Nodes> <Exit> | <Exit>) . |
||
| 14 | <Nodes> ::= <Node> | <Nodes> <Node> . |
||
| 15 | <Node> ::= <LeafNode> | <LeafNode> <IncreaseLevel> <Nodes> <DecreaseLevel> . |
||
| 31 | daniel-mar | 16 | <LeafNode> ::= "N" <Icon(8)> <LineNo(8)> <DescLen(4)> <Desc(Utf8)> . |
| 27 | daniel-mar | 17 | <IncreaseLevel> ::= "I" . |
| 18 | <DecreaseLevel> ::= "D" . |
||
| 19 | <Exit> ::= "X" . |
||
| 20 | |||
| 33 | daniel-mar | 21 | <Icon(8)> ::= <Type(4)> <Attr(4)> . |
| 22 | |||
| 27 | daniel-mar | 23 | *) |
| 24 | |||
| 25 | type |
||
| 26 | TTreeViewFastPHP = class helper for TTreeView |
||
| 27 | private |
||
| 28 | //FPrevFastPHPData: string; |
||
| 29 | class function Read(var ptr: PChar; len: integer): string; inline; |
||
| 30 | procedure Rec100(tn: TTreeNode; var ptr: PChar); |
||
| 31 | protected |
||
| 32 | procedure DoFillWithFastPHPData(ptr: PChar); |
||
| 33 | public |
||
| 34 | procedure FillWithFastPHPData(data: string); |
||
| 35 | end; |
||
| 36 | |||
| 37 | EFastNodeException = class(Exception); |
||
| 38 | |||
| 39 | implementation |
||
| 40 | |||
| 41 | uses |
||
| 42 | StrUtils; |
||
| 43 | |||
| 44 | const |
||
| 45 | LEN_MAGIC = 8; |
||
| 28 | daniel-mar | 46 | LEN_ICON = 8; |
| 27 | daniel-mar | 47 | LEN_LINENO = 8; |
| 48 | LEN_DESCLEN = 4; |
||
| 49 | |||
| 50 | procedure TTreeViewFastPHP.DoFillWithFastPHPData(ptr: PChar); |
||
| 51 | var |
||
| 52 | s: String; |
||
| 53 | tn, tmp: TTreeNode; |
||
| 54 | expanded: TStringList; |
||
| 55 | selected, magic: string; |
||
| 56 | i: integer; |
||
| 57 | begin |
||
| 58 | selected := ''; |
||
| 59 | expanded := TStringList.Create; |
||
| 60 | Self.Items.BeginUpdate; |
||
| 61 | try |
||
| 62 | {$REGION 'Remember our current state (selected and expanded flags)'} |
||
| 63 | for i := 0 to Self.Items.Count-1 do |
||
| 64 | begin |
||
| 65 | tn := Self.Items.Item[i]; |
||
| 66 | s := tn.Text; |
||
| 67 | tmp := tn.Parent; |
||
| 68 | while tmp <> nil do |
||
| 69 | begin |
||
| 70 | s := tmp.Text + #0 + s; |
||
| 71 | tmp := tmp.Parent; |
||
| 72 | end; |
||
| 73 | if tn.Selected then selected := s; |
||
| 74 | if tn.Expanded and tn.HasChildren then expanded.Add(s); |
||
| 75 | end; |
||
| 76 | {$ENDREGION} |
||
| 77 | |||
| 78 | {$REGION 'Update the treeview'} |
||
| 79 | Self.Items.Clear; |
||
| 80 | magic := Read(ptr, LEN_MAGIC); |
||
| 81 | if magic = 'FAST100!' then |
||
| 82 | Rec100(nil, ptr) |
||
| 83 | else |
||
| 84 | raise EFastNodeException.CreateFmt('FastNode version "%s" not supported.', [magic]); |
||
| 85 | {$ENDREGION} |
||
| 86 | |||
| 87 | {$REGION 'Recover the previous current state (selected and expanded flags)'} |
||
| 88 | for i := 0 to Self.Items.Count-1 do |
||
| 89 | begin |
||
| 90 | tn := Self.Items.Item[i]; |
||
| 91 | s := tn.Text; |
||
| 92 | tmp := tn.Parent; |
||
| 93 | while tmp <> nil do |
||
| 94 | begin |
||
| 95 | s := tmp.Text + #0 + s; |
||
| 96 | tmp := tmp.Parent; |
||
| 97 | end; |
||
| 98 | if selected = s then tn.Selected := true; |
||
| 99 | if expanded.IndexOf(s) >= 0 then tn.Expand(false); |
||
| 100 | end; |
||
| 101 | {$ENDREGION} |
||
| 102 | finally |
||
| 103 | expanded.Free; |
||
| 104 | Self.Items.EndUpdate; |
||
| 105 | end; |
||
| 106 | end; |
||
| 107 | |||
| 108 | procedure TTreeViewFastPHP.FillWithFastPHPData(data: string); |
||
| 109 | begin |
||
| 110 | //if FPrevFastPHPData = data then exit; |
||
| 111 | //FPrevFastPHPData := data; |
||
| 112 | |||
| 113 | data := Trim(data); |
||
| 114 | if not EndsStr('X', data) then raise EFastNodeException.Create('FastNode string must end with "X"'); |
||
| 115 | |||
| 116 | DoFillWithFastPHPData(PChar(data)); |
||
| 117 | end; |
||
| 118 | |||
| 119 | class function TTreeViewFastPHP.Read(var ptr: PChar; len: integer): string; |
||
| 120 | begin |
||
| 121 | result := Copy(string(ptr), 1, len); |
||
| 122 | inc(ptr, len); |
||
| 123 | end; |
||
| 124 | |||
| 125 | procedure TTreeViewFastPHP.Rec100(tn: TTreeNode; var ptr: PChar); |
||
| 126 | var |
||
| 28 | daniel-mar | 127 | typ, icon, lineno, len, caption: string; |
| 27 | daniel-mar | 128 | lastTn: TTreeNode; |
| 129 | begin |
||
| 130 | try |
||
| 131 | lastTn := nil; |
||
| 132 | while true do |
||
| 133 | begin |
||
| 134 | repeat |
||
| 135 | typ := Read(ptr, 1); |
||
| 136 | until Trim(typ) <> ''; |
||
| 137 | if typ = 'N' then // new node |
||
| 138 | begin |
||
| 28 | daniel-mar | 139 | icon := Read(ptr, LEN_ICON); |
| 27 | daniel-mar | 140 | lineno := Read(ptr, LEN_LINENO); |
| 28 | daniel-mar | 141 | len := Read(ptr, LEN_DESCLEN); |
| 31 | daniel-mar | 142 | caption := Utf8Decode(Read(ptr, StrToInt(len))); |
| 27 | daniel-mar | 143 | if tn = nil then |
| 144 | lastTn := Self.Items.Add(nil, caption) |
||
| 145 | else |
||
| 146 | lastTn := Self.Items.AddChild(tn, caption); |
||
| 33 | daniel-mar | 147 | // lastTn.ImageIndex := // TODO |
| 27 | daniel-mar | 148 | lastTn.Data := Pointer(StrToInt(lineno)); // TODO: is this good? |
| 149 | end |
||
| 150 | else if typ = 'I' then // increase level |
||
| 151 | begin |
||
| 152 | if LastTn = nil then raise EFastNodeException.Create('Fast100: Increase command requires previous node'); |
||
| 153 | Rec100(lastTn, ptr); |
||
| 154 | end |
||
| 155 | else if typ = 'D' then Exit // decrease level |
||
| 156 | else if typ = 'X' then Abort // exit |
||
| 157 | else raise EFastNodeException.CreateFmt('Fast100: Command "%s" unknown', [typ]); |
||
| 158 | end; |
||
| 159 | except |
||
| 160 | on E: EAbort do |
||
| 33 | daniel-mar | 161 | if tn = nil then |
| 162 | exit |
||
| 163 | else |
||
| 164 | raise; |
||
| 27 | daniel-mar | 165 | else |
| 166 | raise; |
||
| 167 | end; |
||
| 168 | end; |
||
| 169 | |||
| 170 | end. |