home *** CD-ROM | disk | FTP | other *** search
Text File | 1990-03-03 | 3.1 KB | 72 lines | [04] ASCII Text (0x0000) |
- Apple II
- File Type Notes
- _____________________________________________________________________________
- Developer Technical Support
-
- File Type: $50 (80)
- Auxiliary Type: $5445
-
- Full Name: Teach Document
- Short Name: Teach document
-
- Written by: Matt Deatherage March 1990
-
- Files of this type and auxiliary type contain TextEdit-based documents.
- _____________________________________________________________________________
-
- With the advent of TextEdit for the IIGS, many small text-editing applications
- have suddenly appeared. Apple may wish to release such a utility with the
- System Software in the future, and has defined this simple file format for the
- use of such a utility (referred to as "Teach" after the Macintosh program
- "TeachText" by Bryan Stearns) and the use of any other text-editing program.
-
- The file format is eminently suitable for a Text Edit record, and applications
- should feel free to save any Text Edit record using this file format. The
- auxiliary type is the ASCII letters "TE".
-
- The Data Fork
-
- The data fork of a Teach document contains ASCII text. All 256 characters are
- allowed. The data fork should not contain anything that shouldn't be
- interpreted as ASCII text (for example, no data structures or pointers to
- lines, etc.).
-
- The Resource Fork
-
- The resource fork of a Teach document contains two resources. The first
- resource is of type rStyleBlock ($8012) and has ID $00000001. This resource
- contains all the style information for the text contained in the data fork.
- Each Teach document must contain this resource. Programs that use Teach
- documents may pass the resource ID $00000001 to TextEdit calls that require
- TEFormat data structures, which is the data structure contained in an
- rStyleBlock resource. If this resource does not exist, passing the ID to
- TextEdit could bring the system down.
-
- The second resource is of type $7001 and has ID $00000001..This resource
- contains window position information. If the TextEdit record contains a ruler
- which is tied to the window position (so the text rewraps when the window is
- resized), when an application saves the record, it must include this resource.
- In the same respect, if this resource exists in a Teach file, an application
- must use this resource to set the window position and size.
-
- Warning: If an application fails to follow either of these steps,
- TextEdit may hang.
-
- The format of this second resource is as follows:
-
- Height (+000) Word The window height in pixels.
- Width (+002) Word The window width in pixels.
- Top (+004) Word The y coordinate of the window's top.
- Left (+006) Word The x coordinate of the window's left edge.
- Version (+008) Long Version number. Must be set to zero.
-
- Other resources should not be placed in Teach documents. Any program saving a
- document could delete an older file with the same name instead of rewriting
- it, causing any other resources to be lost.
-
-
- Further Reference
- _____________________________________________________________________________
- o Apple IIGS Toolbox Reference, Volume 3
-
-