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Rev | Author | Line No. | Line |
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82 | daniel-mar | 1 | unit FastPHPTreeView; |
27 | daniel-mar | 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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40 | daniel-mar | 45 | function DoFillWithFastPHPData(ptr: PChar): boolean; |
27 | daniel-mar | 46 | public |
40 | daniel-mar | 47 | function FillWithFastPHPData(data: string): boolean; |
27 | daniel-mar | 48 | end; |
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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70 | daniel-mar | 58 | MAGIC_V100 = 'FAST100!'; |
82 | daniel-mar | 59 | UTF8_BOM = #$EF#$BB#$BF; |
36 | daniel-mar | 60 | LEN_ICON = 4; |
27 | daniel-mar | 61 | LEN_LINENO = 8; |
62 | LEN_DESCLEN = 4; |
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63 | |||
34 | daniel-mar | 64 | {$EXTERNALSYM LockWindowUpdate} |
65 | function LockWindowUpdate(hWndLock: HWND): BOOL; stdcall; external user32 name 'LockWindowUpdate'; |
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66 | |||
36 | daniel-mar | 67 | function HexToInt(HexNum: string): LongInt; |
68 | begin |
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69 | Result := StrToInt('$' + HexNum); |
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70 | end; |
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71 | |||
40 | daniel-mar | 72 | function TTreeViewFastPHP.DoFillWithFastPHPData(ptr: PChar): boolean; |
35 | daniel-mar | 73 | |
74 | function _NodeID(tn: TTreeNode): string; |
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75 | var |
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76 | tmp: TTreeNode; |
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77 | begin |
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78 | // Attention: This function requires that the tree node items are unique |
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79 | // e.g. Class1->function1() is unique |
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80 | result := tn.Text; |
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81 | tmp := tn.Parent; |
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82 | while tmp <> nil do |
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83 | begin |
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84 | result := tmp.Text + #0 + result; |
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85 | tmp := tmp.Parent; |
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86 | end; |
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87 | end; |
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88 | |||
27 | daniel-mar | 89 | var |
90 | s: String; |
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35 | daniel-mar | 91 | tn: TTreeNode; |
27 | daniel-mar | 92 | expanded: TStringList; |
35 | daniel-mar | 93 | selected, magic: string; |
94 | horPos, verPos: integer; |
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27 | daniel-mar | 95 | i: integer; |
96 | begin |
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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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40 | daniel-mar | 99 | result := GetCapture <> Handle; |
100 | if not result then exit; |
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36 | daniel-mar | 101 | |
27 | daniel-mar | 102 | selected := ''; |
103 | expanded := TStringList.Create; |
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35 | daniel-mar | 104 | horPos := GetScrollPos(Handle, SB_HORZ); |
105 | verPos := GetScrollPos(Handle, SB_VERT); |
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40 | daniel-mar | 106 | LockWindowUpdate(Handle); // Parent is better choice for FastPHP... but for other applications it might be wrong? |
27 | daniel-mar | 107 | Self.Items.BeginUpdate; |
108 | try |
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109 | {$REGION 'Remember our current state (selected and expanded flags)'} |
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110 | for i := 0 to Self.Items.Count-1 do |
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111 | begin |
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112 | tn := Self.Items.Item[i]; |
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35 | daniel-mar | 113 | s := _NodeID(tn); |
27 | daniel-mar | 114 | if tn.Selected then selected := s; |
115 | if tn.Expanded and tn.HasChildren then expanded.Add(s); |
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116 | end; |
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117 | {$ENDREGION} |
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118 | |||
119 | {$REGION 'Update the treeview'} |
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120 | Self.Items.Clear; |
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70 | daniel-mar | 121 | |
122 | {$REGION 'Remove UTF8-BOMs'} |
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123 | repeat |
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124 | magic := Read(ptr, Length(UTF8_BOM)); |
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125 | until magic <> UTF8_BOM; |
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126 | ptr := ptr - Length(UTF8_BOM); |
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127 | {$ENDREGION} |
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128 | |||
129 | magic := Read(ptr, length(MAGIC_V100)); |
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130 | |||
131 | if magic = MAGIC_V100 then |
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132 | begin |
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43 | daniel-mar | 133 | Rec100(nil, ptr) |
70 | daniel-mar | 134 | end |
43 | daniel-mar | 135 | else |
70 | daniel-mar | 136 | begin |
82 | daniel-mar | 137 | // Can happen if codeexplorer.php did output a warning |
138 | raise EFastNodeException.CreateFmt('FastNode version "%s" not supported. More content: %s', [magic, Read(ptr,1000)]); |
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70 | daniel-mar | 139 | end; |
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 | |||
40 | daniel-mar | 162 | function TTreeViewFastPHP.FillWithFastPHPData(data: string): boolean; |
43 | daniel-mar | 163 | var |
164 | tn: TTreeNode; |
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27 | daniel-mar | 165 | begin |
44 | daniel-mar | 166 | result := false; |
43 | daniel-mar | 167 | try |
168 | data := Trim(data); |
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169 | if not EndsStr('X', data) then raise EFastNodeException.Create('FastNode string must end with "X"'); |
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27 | daniel-mar | 170 | |
43 | daniel-mar | 171 | result := DoFillWithFastPHPData(PChar(data)); |
172 | except |
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173 | on E: Exception do |
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174 | begin |
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175 | Self.Items.Clear; |
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176 | tn := Self.Items.Add(nil, 'ERROR: ' + E.Message); |
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177 | tn.ImageIndex := -1; |
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178 | tn.SelectedIndex := -1; |
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179 | end; |
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180 | end; |
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27 | daniel-mar | 181 | end; |
182 | |||
183 | class function TTreeViewFastPHP.Read(var ptr: PChar; len: integer): string; |
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184 | begin |
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185 | result := Copy(string(ptr), 1, len); |
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186 | inc(ptr, len); |
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187 | end; |
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188 | |||
189 | procedure TTreeViewFastPHP.Rec100(tn: TTreeNode; var ptr: PChar); |
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190 | var |
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28 | daniel-mar | 191 | typ, icon, lineno, len, caption: string; |
27 | daniel-mar | 192 | lastTn: TTreeNode; |
193 | begin |
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194 | try |
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195 | lastTn := nil; |
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196 | while true do |
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197 | begin |
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198 | repeat |
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199 | typ := Read(ptr, 1); |
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200 | until Trim(typ) <> ''; |
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201 | if typ = 'N' then // new node |
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202 | begin |
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28 | daniel-mar | 203 | icon := Read(ptr, LEN_ICON); |
27 | daniel-mar | 204 | lineno := Read(ptr, LEN_LINENO); |
28 | daniel-mar | 205 | len := Read(ptr, LEN_DESCLEN); |
31 | daniel-mar | 206 | caption := Utf8Decode(Read(ptr, StrToInt(len))); |
27 | daniel-mar | 207 | if tn = nil then |
208 | lastTn := Self.Items.Add(nil, caption) |
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209 | else |
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210 | lastTn := Self.Items.AddChild(tn, caption); |
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36 | daniel-mar | 211 | |
212 | {$REGION 'Determinate icon'} |
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213 | if icon = '____' then |
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214 | lastTn.ImageIndex := -1 |
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215 | else |
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216 | lastTn.ImageIndex := StrToInt(icon); |
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217 | lastTn.SelectedIndex := lastTn.ImageIndex; |
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218 | {$ENDREGION} |
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219 | |||
220 | lastTn.Data := Pointer(StrToInt(lineno)); // Hack... |
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27 | daniel-mar | 221 | end |
222 | else if typ = 'I' then // increase level |
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223 | begin |
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224 | if LastTn = nil then raise EFastNodeException.Create('Fast100: Increase command requires previous node'); |
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225 | Rec100(lastTn, ptr); |
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226 | end |
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227 | else if typ = 'D' then Exit // decrease level |
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228 | else if typ = 'X' then Abort // exit |
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229 | else raise EFastNodeException.CreateFmt('Fast100: Command "%s" unknown', [typ]); |
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230 | end; |
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231 | except |
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232 | on E: EAbort do |
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33 | daniel-mar | 233 | if tn = nil then |
234 | exit |
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235 | else |
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236 | raise; |
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27 | daniel-mar | 237 | else |
238 | raise; |
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239 | end; |
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240 | end; |
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241 | |||
242 | end. |