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GoFiler Legato Script Reference
Legato v 1.5b Application v 5.24b
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Chapter Eleven — SGML Functions (continued)
Overview
The HTMLContextScan performs a context scan of the file associated with HTML Context Object.
Syntax/Parameters
Syntax
int = HTMLContextScan ( handle hObject,
[int s_x, int
s_y, [int e_x, int e_y ]], [dword flags] );
Parameters
hObject
A handle to an HTML Context Object.
s_x s_y
Two int values specifying the start position of the scan.
e_x e_y
Two int values specifying the end position of the scan, also known as the point of interest.
flags
An optional dword specifying what items to track as the file is scanned. If the value is zero or omitted, only the context stack is built.
Return Value
An int as a formatted error code. Use the GetLastErrorMessage function to retrieve additional information. The GetLastError message can be used to retrieve additional scan information.
Remarks
The scan function allows for lists to be built and a context to be developed. Context scanning only applies to an HTML Context Object. If a context object is not provided to functions such as HTMLGetNames, the context scan is automatically run on each call.
Generally, HTMLContextScan is used by specifying the start of the file (0,0) and then a point of interest, for example a table cell. The scanner will stop at the point of interest and the stack may be examined with the HTMLGetContext function. If a section is to be scanned, then the starting position should be set to that point.
The flags parameter is a bitwise value which may consist of the following values:
| SDK Definition | Bitwise | Description | ||||
| HFS_GET_STACK_ONLY | 0x00000000 | No flags, loads only context stack. | ||||
| HFS_GET_NAME_SPACE | 0x00000001 | Track NAME Space | ||||
| HFS_GET_URI_REFERENCE | 0x00000002 | Track URI References | ||||
| HFS_GET_CLASS | 0x00000004 | Track CLASS References | ||||
| HFS_GET_OBJECTS | 0x00000008 | Track Object/Image Definitions | ||||
| HFS_GET_FIELD | 0x00000010 | Track Marker Definitions | ||||
| HFS_GET_FONTS | 0x00010000 | Track Font References | ||||
| HFS_GET_COLORS | 0x00020000 | Track Color References |
At the end of the scan, additional information is returned in a bitwise for within the last error code.
| SDK Definition | Bitwise | Description | ||||
| HFS_RESULT_NESTING | 0x00100000 | File Contains Stack/Nesting Error(s) | ||||
| HFS_RESULT_MID_ENTITY | 0x00200000 | Stopped Mid Entity | ||||
| HFS_RESULT_MID_ELEMENT | 0x00400000 | Stopped Mid Element | ||||
| HFS_RESULT_NOT_VALID_POINT | 0x00600000 | Combine Above |
Note that the HTMLGetContext function will reset the last data range position to the specified positions in the parameters. If a shared SGML Object is employed, make sure the data range and scan positions are reset prior to using the parser.
Related Functions
Platform Support
Go13, Go16, GoFiler Complete, GoFiler Corporate, GoFiler, GoFiler Lite, GoXBRL
Legato IDE, Legato Basic
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