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Rev | Author | Line No. | Line |
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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 | |||
36 | daniel-mar | 12 | Version 1.00 (signature "FAST100!"): |
13 | |||
14 | <FastPHPData100> ::= <Signature100> ( <Nodes> <Exit> | <Exit> ) . |
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15 | <Signature100> ::= "F" "A" "S" "T" "1" "0" "0" "!" . |
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16 | <Nodes> ::= <Node> | ( <Nodes> <Node> ) . |
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17 | <Node> ::= <LeafNode> | ( <LeafNode> <IncreaseLevel> <Nodes> <DecreaseLevel> ) . |
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18 | |||
19 | <LeafNode> ::= "N" <Icon> <LineNo> <DescLen> <Desc> . |
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27 | daniel-mar | 20 | <IncreaseLevel> ::= "I" . |
21 | <DecreaseLevel> ::= "D" . |
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22 | <Exit> ::= "X" . |
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23 | |||
36 | daniel-mar | 24 | <LineNo> ::= <Int8> . |
25 | <DescLen> ::= <Int4> . |
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26 | <Desc> ::= (Utf8-String) . |
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27 | <Icon> ::= <NoIcon> | <ImageIndex> . |
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33 | daniel-mar | 28 | |
36 | daniel-mar | 29 | <NoIcon> ::= "_" "_" "_" "_" . |
30 | <ImageIndex> ::= <Int4> . |
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31 | |||
32 | <Int1> ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" . |
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33 | <Int2> ::= <Int1> <Int1> . |
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34 | <Int4> ::= <Int2> <Int2> . |
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35 | <Int8> ::= <Int4> <Int4> . |
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36 | |||
27 | daniel-mar | 37 | *) |
38 | |||
39 | type |
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40 | TTreeViewFastPHP = class helper for TTreeView |
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41 | private |
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42 | class function Read(var ptr: PChar; len: integer): string; inline; |
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43 | procedure Rec100(tn: TTreeNode; var ptr: PChar); |
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44 | protected |
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45 | procedure DoFillWithFastPHPData(ptr: PChar); |
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46 | public |
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47 | procedure FillWithFastPHPData(data: string); |
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48 | end; |
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49 | |||
50 | EFastNodeException = class(Exception); |
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51 | |||
52 | implementation |
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53 | |||
54 | uses |
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34 | daniel-mar | 55 | StrUtils, Windows; |
27 | daniel-mar | 56 | |
57 | const |
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58 | LEN_MAGIC = 8; |
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36 | daniel-mar | 59 | LEN_ICON = 4; |
27 | daniel-mar | 60 | LEN_LINENO = 8; |
61 | LEN_DESCLEN = 4; |
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62 | |||
34 | daniel-mar | 63 | {$EXTERNALSYM LockWindowUpdate} |
64 | function LockWindowUpdate(hWndLock: HWND): BOOL; stdcall; external user32 name 'LockWindowUpdate'; |
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65 | |||
36 | daniel-mar | 66 | function HexToInt(HexNum: string): LongInt; |
67 | begin |
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68 | Result := StrToInt('$' + HexNum); |
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69 | end; |
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70 | |||
27 | daniel-mar | 71 | procedure TTreeViewFastPHP.DoFillWithFastPHPData(ptr: PChar); |
35 | daniel-mar | 72 | |
73 | function _NodeID(tn: TTreeNode): string; |
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74 | var |
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75 | tmp: TTreeNode; |
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76 | begin |
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77 | // Attention: This function requires that the tree node items are unique |
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78 | // e.g. Class1->function1() is unique |
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79 | result := tn.Text; |
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80 | tmp := tn.Parent; |
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81 | while tmp <> nil do |
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82 | begin |
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83 | result := tmp.Text + #0 + result; |
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84 | tmp := tmp.Parent; |
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85 | end; |
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86 | end; |
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87 | |||
27 | daniel-mar | 88 | var |
89 | s: String; |
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35 | daniel-mar | 90 | tn: TTreeNode; |
27 | daniel-mar | 91 | expanded: TStringList; |
35 | daniel-mar | 92 | selected, magic: string; |
93 | horPos, verPos: integer; |
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27 | daniel-mar | 94 | i: integer; |
36 | daniel-mar | 95 | crc32: string; |
27 | daniel-mar | 96 | begin |
36 | daniel-mar | 97 | // No update if the user is dragging the scrollbar |
98 | // (otherwise the program will somehow lock up) |
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99 | if GetCapture = Handle then exit; |
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100 | |||
101 | // Don't rebuild the treeview if nothing has changed (use the Tag property to store the CRC32) |
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102 | crc32 := Read(ptr, 8); |
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103 | if crc32 = IntToHex(Tag, 8) then exit; |
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104 | Tag := HexToInt(crc32); |
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105 | |||
27 | daniel-mar | 106 | selected := ''; |
107 | expanded := TStringList.Create; |
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35 | daniel-mar | 108 | horPos := GetScrollPos(Handle, SB_HORZ); |
109 | verPos := GetScrollPos(Handle, SB_VERT); |
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34 | daniel-mar | 110 | LockWindowUpdate(Parent.Handle); // Parent is better choice for FastPHP... but for other applications it might be wrong? |
27 | daniel-mar | 111 | Self.Items.BeginUpdate; |
112 | try |
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113 | {$REGION 'Remember our current state (selected and expanded flags)'} |
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114 | for i := 0 to Self.Items.Count-1 do |
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115 | begin |
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116 | tn := Self.Items.Item[i]; |
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35 | daniel-mar | 117 | s := _NodeID(tn); |
27 | daniel-mar | 118 | if tn.Selected then selected := s; |
119 | if tn.Expanded and tn.HasChildren then expanded.Add(s); |
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120 | end; |
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121 | {$ENDREGION} |
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122 | |||
123 | {$REGION 'Update the treeview'} |
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124 | Self.Items.Clear; |
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36 | daniel-mar | 125 | try |
126 | magic := Read(ptr, LEN_MAGIC); |
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127 | if magic = 'FAST100!' then |
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128 | Rec100(nil, ptr) |
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129 | else |
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130 | raise EFastNodeException.CreateFmt('FastNode version "%s" not supported.', [magic]); |
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131 | except |
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132 | on E: Exception do |
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133 | begin |
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134 | Self.Items.Clear; |
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135 | tn := Self.Items.Add(nil, 'ERROR: ' + E.Message); |
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136 | tn.ImageIndex := -1; |
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137 | tn.SelectedIndex := -1; |
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138 | end; |
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139 | end; |
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27 | daniel-mar | 140 | {$ENDREGION} |
141 | |||
142 | {$REGION 'Recover the previous current state (selected and expanded flags)'} |
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143 | for i := 0 to Self.Items.Count-1 do |
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144 | begin |
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145 | tn := Self.Items.Item[i]; |
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35 | daniel-mar | 146 | s := _NodeID(tn); |
27 | daniel-mar | 147 | if selected = s then tn.Selected := true; |
148 | if expanded.IndexOf(s) >= 0 then tn.Expand(false); |
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149 | end; |
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150 | {$ENDREGION} |
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151 | finally |
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34 | daniel-mar | 152 | Self.Items.EndUpdate; |
153 | LockWindowUpdate(0); |
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35 | daniel-mar | 154 | |
155 | SetScrollPos(Handle, SB_HORZ, horPos, false); |
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156 | SetScrollPos(Handle, SB_VERT, verPos, false); |
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157 | |||
27 | daniel-mar | 158 | expanded.Free; |
159 | end; |
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160 | end; |
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161 | |||
162 | procedure TTreeViewFastPHP.FillWithFastPHPData(data: string); |
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163 | begin |
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164 | data := Trim(data); |
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165 | if not EndsStr('X', data) then raise EFastNodeException.Create('FastNode string must end with "X"'); |
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166 | |||
167 | DoFillWithFastPHPData(PChar(data)); |
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168 | end; |
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169 | |||
170 | class function TTreeViewFastPHP.Read(var ptr: PChar; len: integer): string; |
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171 | begin |
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172 | result := Copy(string(ptr), 1, len); |
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173 | inc(ptr, len); |
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174 | end; |
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175 | |||
176 | procedure TTreeViewFastPHP.Rec100(tn: TTreeNode; var ptr: PChar); |
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177 | var |
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28 | daniel-mar | 178 | typ, icon, lineno, len, caption: string; |
27 | daniel-mar | 179 | lastTn: TTreeNode; |
180 | begin |
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181 | try |
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182 | lastTn := nil; |
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183 | while true do |
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184 | begin |
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185 | repeat |
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186 | typ := Read(ptr, 1); |
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187 | until Trim(typ) <> ''; |
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188 | if typ = 'N' then // new node |
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189 | begin |
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28 | daniel-mar | 190 | icon := Read(ptr, LEN_ICON); |
27 | daniel-mar | 191 | lineno := Read(ptr, LEN_LINENO); |
28 | daniel-mar | 192 | len := Read(ptr, LEN_DESCLEN); |
31 | daniel-mar | 193 | caption := Utf8Decode(Read(ptr, StrToInt(len))); |
27 | daniel-mar | 194 | if tn = nil then |
195 | lastTn := Self.Items.Add(nil, caption) |
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196 | else |
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197 | lastTn := Self.Items.AddChild(tn, caption); |
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36 | daniel-mar | 198 | |
199 | {$REGION 'Determinate icon'} |
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200 | if icon = '____' then |
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201 | lastTn.ImageIndex := -1 |
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202 | else |
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203 | lastTn.ImageIndex := StrToInt(icon); |
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204 | lastTn.SelectedIndex := lastTn.ImageIndex; |
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205 | {$ENDREGION} |
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206 | |||
207 | lastTn.Data := Pointer(StrToInt(lineno)); // Hack... |
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27 | daniel-mar | 208 | end |
209 | else if typ = 'I' then // increase level |
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210 | begin |
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211 | if LastTn = nil then raise EFastNodeException.Create('Fast100: Increase command requires previous node'); |
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212 | Rec100(lastTn, ptr); |
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213 | end |
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214 | else if typ = 'D' then Exit // decrease level |
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215 | else if typ = 'X' then Abort // exit |
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216 | else raise EFastNodeException.CreateFmt('Fast100: Command "%s" unknown', [typ]); |
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217 | end; |
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218 | except |
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219 | on E: EAbort do |
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33 | daniel-mar | 220 | if tn = nil then |
221 | exit |
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222 | else |
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223 | raise; |
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27 | daniel-mar | 224 | else |
225 | raise; |
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226 | end; |
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227 | end; |
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228 | |||
229 | end. |