While doing other work in fossil, I've made a few enhancements to TH1.
A) Removed expensive double scanning of whitespace in thEvalLocal during:
* word-by-word parsing in the gobble phase of thEvalLocal.
* # comment to EOL scanning
B) Added "\" end-of-line continuation support for both # comments and
regular parsing. Line continuation supports both "\n" and "\r\n" line
formats.
Thus making it possible to write expression like:
puts\
1;
#\
or whatever else comment
# and so on \
and on
puts \
2;
Which properly runs and outputs "12".
C) Minor fixes relating to makemake.tcl to add /FS build flag needed on
windows to avoid parallel build race conditions while accessing .obj
files. Explored tweaking the translate.c tool to support C99 //
transformation for C89 back-compat to enable sources to use //.
D) Added C-layer Th_RenderEx to support script execution with security
controls and output to a blob-output target capability. Added HTML
script tag and variable reference compatibility to TH1 to allow
variables and scripts to be conformingly embedded in HTML. Enabled TH1
variable references and privileged author execution of scripts
throughout the wiki, ticket, etc system. Added additional hooks to
support URL handling including GET/PUT requests using TH1.
E) Wrote wikieditor replacement. I.e., a new HTML/Markup (TH1+JS+CSS)
customizable editor component with key-bindings that is mimetype aware
and unifies the HTML+TH1, markdown, and fossil-wiki editing model.
Import and export of wiki-files now can round-trip and transparently
incorporate mimetype to file extension mappings.
F) Wrote some basic TH1 libraries and documentation to make learning and
using TH1 within fossil a lower friction exercise.
(A) Is only a performance fix, other perf-fixes exist as low-hanging
fruit but that one was simple while refactoring for (B). The next
obvious one is to remove the gobble phase entirely.
(B) Was more significant as we kept running into many cases using TH1
where we needed long lines and not having continuations made quoting
forms a PITB .
(D+E) Allows arbitrary server-side code to be written via the wiki or
checkins. Any item containing scripts will have the scripts treated as
no-ops if the author of the script doesn't have execution rights on the
repo.
Cheers,
-- DSim
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