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This is a total conversion of SciTECO to plain C (GNU C11).
The chance was taken to improve a lot of internal datastructures,
fix fundamental bugs and lay the foundations of future features.
The GTK user interface is now in an useable state!
All changes have been squashed together.
The language itself has almost not changed at all, except for:
* Detection of string terminators (usually Escape) now takes
the string building characters into account.
A string is only terminated outside of string building characters.
In other words, you can now for instance write
I^EQ[Hello$world]$
This removes one of the last bits of shellisms which is out of
place in SciTECO where no tokenization/lexing is performed.
Consequently, the current termination character can also be
escaped using ^Q/^R.
This is used by auto completions to make sure that strings
are inserted verbatim and without unwanted sideeffects.
* All strings can now safely contain null-characters
(see also: 8-bit cleanliness).
The null-character itself (^@) is not (yet) a valid SciTECO
command, though.
An incomplete list of changes:
* We got rid of the BSD headers for RB trees and lists/queues.
The problem with them was that they used a form of metaprogramming
only to gain a bit of type safety. It also resulted in less
readble code. This was a C++ desease.
The new code avoids metaprogramming only to gain type safety.
The BSD tree.h has been replaced by rb3ptr by Jens Stimpfle
(https://github.com/jstimpfle/rb3ptr).
This implementation is also more memory efficient than BSD's.
The BSD list.h and queue.h has been replaced with a custom
src/list.h.
* Fixed crashes, performance issues and compatibility issues with
the Gtk 3 User Interface.
It is now more or less ready for general use.
The GDK lock is no longer used to avoid using deprecated functions.
On the downside, the new implementation (driving the Gtk event loop
stepwise) is even slower than the old one.
A few glitches remain (see TODO), but it is hoped that they will
be resolved by the Scintilla update which will be performed soon.
* A lot of program units have been split up, so they are shorter
and easier to maintain: core-commands.c, qreg-commands.c,
goto-commands.c, file-utils.h.
* Parser states are simply structs of callbacks now.
They still use a kind of polymorphy using a preprocessor trick.
TECO_DEFINE_STATE() takes an initializer list that will be
merged with the default list of field initializers.
To "subclass" states, you can simply define new macros that add
initializers to existing macros.
* Parsers no longer have a "transitions" table but the input_cb()
may use switch-case statements.
There are also teco_machine_main_transition_t now which can
be used to implement simple transitions. Additionally, you
can specify functions to execute during transitions.
This largely avoids long switch-case-statements.
* Parsers are embeddable/reusable now, at least in parse-only mode.
This does not currently bring any advantages but may later
be used to write a Scintilla lexer for TECO syntax highlighting.
Once parsers are fully embeddable, it will also be possible
to run TECO macros in a kind of coroutine which would allow
them to process string arguments in real time.
* undo.[ch] still uses metaprogramming extensively but via
the C preprocessor of course. On the downside, most undo
token generators must be initiated explicitly (theoretically
we could have used embedded functions / trampolines to
instantiate automatically but this has turned out to be
dangereous).
There is a TECO_DEFINE_UNDO_CALL() to generate closures for
arbitrary functions now (ie. to call an arbitrary function
at undo-time). This simplified a lot of code and is much
shorter than manually pushing undo tokens in many cases.
* Instead of the ridiculous C++ Curiously Recurring Template
Pattern to achieve static polymorphy for user interface
implementations, we now simply declare all functions to
implement in interface.h and link in the implementations.
This is possible since we no longer hace to define
interface subclasses (all state is static variables in
the interface's *.c files).
* Headers are now significantly shorter than in C++ since
we can often hide more of our "class" implementations.
* Memory counting is based on dlmalloc for most platforms now.
Unfortunately, there is no malloc implementation that
provides an efficient constant-time memory counter that
is guaranteed to decrease when freeing memory.
But since we use a defined malloc implementation now,
malloc_usable_size() can be used safely for tracking memory use.
malloc() replacement is very tricky on Windows, so we
use a poll thread on Windows. This can also be enabled
on other supported platforms using --disable-malloc-replacement.
All in all, I'm still not pleased with the state of memory
limiting. It is a mess.
* Error handling uses GError now. This has the advantage that
the GError codes can be reused once we support error catching
in the SciTECO language.
* Added a few more test suite cases.
* Haiku is no longer supported as builds are instable and
I did not manage to debug them - quite possibly Haiku bugs
were responsible.
* Glib v2.44 or later are now required.
The GTK UI requires Gtk+ v3.12 or later now.
The GtkFlowBox fallback and sciteco-wrapper workaround are
no longer required.
* We now extensively use the GCC/Clang-specific g_auto
feature (automatic deallocations when leaving the current
code block).
* Updated copyright to 2021.
SciTECO has been in continuous development, even though there
have been no commits since 2018.
* Since these changes are so significant, the target release has
been set to v2.0.
It is planned that beginning with v3.0, the language will be
kept stable.
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detect EMCurses
* Emscripten can be used (theoretically) to build a host-only platform-independant version
of SciTECO (running under node.js instead of the browser).
* I ported netbsd-curses with Emscripten for that purpose. Therefore, adaptions for running
in the browser are restricted to EMcurses now.
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* when enabled, it will automatically upper-case all
one or two letter commands (which are case insensitive).
* also affects the up-carret control commands, so they when inserted
they look more like real control commands.
* specifically does not affect case-insensitive Q-Register specifications
* the result are command lines that are better readable and conform
to the coding style used in SciTECO's standard library.
This eases reusing command lines as well.
* Consequently, string-building and pattern match characters should
be case-folded as well, but they aren't currently since
State::process_edit_cmd() does not have sufficient insight
into the MicroStateMachines. Also, it could not be delegated
to the MicroStateMachines.
Perhaps they should be abandoned in favour of embeddedable
regular state machines; or regular state machines with a stack
of return states?
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* StateQueryQReg is now derived from StateExpectQReg
whose semantics have been changed slightly.
* The alternative would have been another common base class for both
StateQueryQReg and StateExpectQReg.
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editing key
* StateEscape should return the same fnmacro mask as StateStart
* When rubbing out a command, we should stop at StateEscape as well.
Therefore we reintroduced States::is_start().
RTTI is still not used.
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as State::process_edit_cmd() virtual methods
* Cmdline::process_edit_cmd() was much too long and deeply nested.
It used RTTI excessively to implement the state-specific behaviour.
It became apparent that the behaviour is largely state-specific and could be
modelled much more elegantly as virtual methods of State.
* Basically, a state can now implement a method to customize its
commandline behaviour.
In the case that the state does not define custom behaviour for
the key pressed, it can "chain" to the parent class' process_edit_cmd().
This can be optimized to tail calls by the compiler.
* The State::process_edit_cmd() implementations are still isolated in
cmdline.cpp. This is not strictly necessary but allows us keep the
already large compilations units like parser.cpp small.
Also, the edit command processing has little to do with the rest of
a state's functionality and is only used in interactive mode.
* As a result, we have many small functions now which are much easier to
maintain.
This makes adding new and more complex context sensitive editing behaviour
easier.
* State-specific function key masking has been refactored by introducing
State::get_fnmacro_mask().
* This allowed us to remove the States::is_*() functions which have
always been a crutch to support context-sensitive key handling.
* RTTI is almost completely eradicated, except for exception handling
and StdError(). Both remaining cases can probably be avoided in the
future, allowing us to compile smaller binaries.
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and added a FreeBSD/jemalloc-specific implementation
* largely reverts 39cfc573, but leaves in minor and documentation
changes.
* further experimentation of memory limiting using malloc() wrapping
has shown additional problems, like dlsym() calling malloc-functions,
further reducing the implementation to glibc-specific means.
This means there had been no implementation for FreeBSD and checks
would have to rely on undocumented internal implementation details
of different libcs, which is not a good thing.
* Other problems have been identified, like having to wrap calloc(),
guarding against underruns and multi-thread safety had been identified
but could be worked around.
* A technique by calculating the memory usage as sbrk(0) - &end
has been shown to be effective enough, at least on glibc.
However even on glibc it has shortcomings since malloc() will
somtimes use mmap() for allocations and the technique
relies on implementation details of the libc.
Furthermore another malloc_trim(0) had to be added to the error
recovery in interactive mode, since glibc does not adjust the program break
automatically (to avoid syscalls I presume).
* On FreeBSD/jemalloc, the sbrk(0) method totally fails because jemalloc
exclusively allocates via mmap() -> that solution was discarded as well.
* Since all evaluated techniques turn out to be highly platform
specific, I reverted to the simple and stable platform-specific
mallinfo() API on Linux.
* On FreeBSD/jemalloc, it's possible to use mallctl("stats.allocated")
for the same purpose - so it works there, too now.
It's slower than the other techniques, though.
* A lengthy discussion has been added to memory.cpp, so that we
do not repeat the previous mistakes.
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* The $$ would leave the current state pointing to the "escape" state
which was manually fixed up in macro return handling but not in command line
return (ie. termination) handling.
Therefore the initial state at the start of the command line after $$
was the "escape" state.
The rubout-last-command immediate editing command would consequently
end up in an infinite loop trying to reach the start state.
* This has been fixed by setting the state before throwing Return().
Some additional paranoia assertions have been added to prevent this
bug in the future.
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* Using a common implementation in RBTreeString::auto_complete().
This is very efficient even for very huge tables since only
an O(log(n)) lookup is required and then all entries with a matching
prefix are iterated. Worst-case complexity is still O(n), since all
entries may be legitimate completions.
If necessary, the number of matching entries could be restricted, though.
* Auto completes short and long Q-Reg names.
Short names are "case-insensitive" (since they are upper-cased).
Long specs are terminated with a closing bracket.
* Long spec completions may have problems with names containing
funny characters since they may be misinterpreted as string building
characters or contain braces. All the auto-completions suffered from
this problem already (see TODO).
* This greatly simplifies investigating the Q-Register name spaces
interactively and e.g. calling macros with long names, inserting
environment registers etc.
* Goto labels are terminated with commas since they may be part
of a computed goto.
* Help topics are matched case insensitive (just like the topic
lookup itself) and are terminated with the escape character.
This greatly simplifies navigating womanpages and looking up
topics with long names.
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called tedoc.tes
* some code simplifications
* it now supports command line arguments via getopt.tes.
* the -C flag enabled C/C++ mode.
By default tedoc parses SciTECO code which means it can be used
to document macro packages as well.
* Therefore it is installed as a separate tool now.
It may be used as a Groff preprocessor for third-party macro
authors to generate (wo)man pages.
* there's a man page tedoc.tes(1)
* The troff placeholder macro is now called ".TEDOC".
* Help topics can now be specified after the starting comment /*$ or !*$.
Topics have been defined for all built-in commands.
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escape glob patterns
* globbing is fnmatch(3) compatible, now on every supported platform.
* which means that escaping of glob patterns is possible now.
^ENq has been introduced to ease this task.
* This finally allows you to pass unmodified filenames to EB.
Previously it was impossible to open file names containing glob wildcards.
* this was achieved by moving from GPattern to GRegex as the underlying
implementation.
* The glob pattern is converted to a regular expression before being
compiled to a GRegex.
This turned out to be trickier than anticipated (~140 lines of code)
and has a runtime penalty of course (complexity is O(2*n) over the
pattern length).
It is IMHO still better than the alternatives, like importing
external code from libiberty, which is potentially non-cross-platform.
* Using GRegex also opens the potential of supporting brace "expansions"
later in the form of glob pattern constructs
(they won't actually expand but match alternatives).
* is_glob_pattern() has been simplified and moved to Globber::is_pattern().
It makes sense to reuse the Globber class namespace instead of using
plain functions for functions working on glob patterns.
* The documentation has a new subsection on glob patterns now.
* Testsuite extended with glob pattern test cases
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* one would expect function key macros masked for the start
state to work after ^[ ($), but since it has its own
state now, this was broken since f08187e454f56954b41d95615ca2e370ba19667e.
* Similarily command reinsertion would reinsert too much
after $, since the parser wouldn't be in the "real" start state.
* The "escape" state should be handled like the start state
(where new commands can begin)
from the perspective of the user -- the difference is not
even documented, it's an implementation detail.
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optimizationa and additional checks
* undo tokens emitted by the expression stack no longer waste
memory by pointing to the stack implementation.
This uses some ugly C++ constant template arguments but
saves 4 or 8 byte per undo token depending on the architecture.
* Round braces are counted now and the return command $$ will
use this information to discard all non-relevant brace levels.
* It is an error to close a brace when none have been opened.
* The bracing rules are still very liberal, allowing you to
close braces in macros belonging to a higher call frame
or leave them open at the end of a macro.
While this is technically possible, it is perhaps a good
idea to stricten these rules in some future release.
* Loops no longer (ab)use the expression stack to store
program counters and loop counters.
This removes flow control from the responsibility of the
expression stack which is much safer now since we can control
where we jump to.
This also eased implemented proper semantics for $$.
* It is an error to leave loops open at the end of a macro
or trying to close a loop opened in the caller of the macro.
Similarily it is only possible to close a loop from the
current invocation frame.
This means it is now impossible to accidentally jump to invalid
PCs.
* Even though loop context stacks could be attached directly to
the macro invocation frame, this would be inefficient.
Instead there's a loop frame pointer now that is part of the
invocation frame. All frames will reuse the same stack structure.
* Loops are automatically discarded when returning using $$.
* Special aggregating forms of the loop start (":<") and loop
end (":>") commands are possible now and have been implemented.
This improves SciTECO's capability as a stack-oriented language.
It is no longer necessary to write recursive macros to generate
stack values of arbitrary length dynamically or to process them.
* All expression and loop stacks are still fixed-size.
It may be a good idea to implement dynamic resizing (TODO).
* Added some G_UNLIKELYs to Execute::macro(). Should improve
the branch prediction of modern CPUs.
* Local Q-Register tables are allocated on the stack now instead
of on the heap (the bulk of a table is stored on the heap anyway).
Should improve performance of macro invocations.
* Document that "F<" will jump to the beginning of the macro
if there is no loop.
This is not in standard TECO, but I consider it a useful feature.
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* <$$> is faster than jumping to the end of the macro
and enables shorter code for returning values from macros.
* this also replaces $$ as an immediate editing command.
In other words, command line termination is an ordinary command
now. The old behaviour was similar to what classic TECO did.
Classic TECO however had no choice than to track key presses
directly for command line termination as it did not keep track
about the parser state as input was typed.
This led to some glitches in the language. For instance
"FS$$" would terminate the command line, unless the second escape
was typed after backspace, etc. This behaviour is not worth copying
and SciTECO did a better job than that by making sure that at least the
second escape is only effective if it is not part of language syntax.
This still lead to some undesirable cases like "ES...$$$" that would
terminate the command line unexpectedly.
To terminate the command line after something like "FS$$", you will
now have to type "FS$$$$".
* As it is a regular command now - just executed immediately - and
its properties stay close to the macro return behaviour, command line
termination may now not always be performed when $$ is typed even
as a standalone command. E.g. "Ofoo$ !bar!$$ !foo!Obar$" will
curiously terminate the command line now.
* This also means that macros can finally terminate command lines
by using the command line editing commands ({ and }) to insert
$$ into the command line macro.
This is also of interest for function key macros.
* This implementation showed some serious shortcoming in SciTECO's
current parser that yet have to be fixed.
E.g. the macro "@^Ua{<$$>}" is currently unsafe since
loops abuse the expression stack for storing their state and $$
does not touch the expression stack. Calling "Ma>" would actually
continue the loop jumping to the beginning of the command line
since program counters referring to the macro A will be reused!
This cannot be easily solved by checking for loop termination
since being able to return that way from loops is a useful
feature. This is a problem even without loops and $$, e.g. as
in "@^Ua{1,2,3(4,5} Ma)".
Instead, a kind of expression stack frame pointer must be
added to macro invocation stack frames, pointing to the beginning
of the expression stack for the current frame.
At the end of macros or on return, the stack contents of
corresponding to the frame can be discarded while preserving the
immediate arguments at the time of the return or end-of-macro.
This would stabilize SciTECO's macro semantics.
* When a top-level macro returns in batch mode, it would
be a good idea to use the last argument to calculate the
process return code, so it can be set by SciTECO scripts (TODO).
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* we cannot use G_N_ELEMENTS in attribute declarations with Clang
unless declaring C++11. In this case, since the size of the orig_color_table
is fixed anyway, the declaration was simply fixed.
* some reordering was necessary in cmdline.cpp. This should not
have any influence on GCC when optimizations are enabled.
* Scintilla/Scinterm had to be updated as well.
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* this means that QRegSpecMachine::input() no longer has to return
a dummy QRegister in parse-only mode.
This saves an unnecessary QRegister table lookup and speeds up
parsing.
* QRegSpecMachine can now be easily extended to behave differently
when returning a Q-Register, e.g. simply returning NULL if a register
does not exist, or returning a register by prefix.
This is important for some planned commands.
* StateExpectQReg::got_register() now gets a QRegister *.
It can theoretically be NULL - still we don't have to check
for NULL in most cases since NULL is only passed in parse-only mode.
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* ^FCLOSE is inserted when the "Close" key is pressed.
It is used by the GTK+ UI to deliver window close requests
and SIGTERM occurrences.
(this replaces the "Break" key used before in the GTK+ UI).
* The default action of ^FCLOSE is to quit SciTECO, therefore
window closing is possible even in --no-profile mode for instance.
* fixed a minor memleak in Cmdline::fnmacro()
* added ^FCLOSE implementation to fnkeys.tes to insert EX.
This currently has the disadvantage of overwriting
the error message with syntax errors if there are modified buffers
but it will at least not close the window if there are modified
buffers.
* SIGTERM will now be similar to SIGINT by default instead of
terminating SciTECO right away.
* the GTK+ UI handles SIGTERM by emulating the "close" key while
still interrupting like SIGINT.
* GTK+: SIGTERM and ^C will interrupt by sending SIGINT to the
entire process group instead of simply setting `sigint_occurred`.
This fixes interrupting EC and EG commands with long-running
or hanging programs and is relevant to the solution of #4.
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* expands to the value of $HOME (the env variable instead of
the register which currently makes a slight difference).
* supported for tab-completions
* supported for all file-name accepting commands.
The expansion is done centrally in StateExpectFile::done().
A new virtual method StateExpectFile::got_file() has been
introduced to pass the expanded/processed file name to
command implementations.
* sciteco(7) has been updated: There is now a separate section
on file name arguments and file name handling in SciTECO.
This information is important but has been scattered across
the document previously.
* optimized is_glob_pattern() in glob.h
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working directory
* FG stands for "Folder Go"
* FG behaves similar to a Unix shell `cd`.
Without arguments, it changes to the $HOME directory.
* The $HOME directory was previously only used by $SCITECOCONFIG on Unix.
Now it is documented on its own, since the HOME directory should also
be configurable on Windows - e.g. to adapt SciTECO to a MinGW or Cygwin
installation.
HOME is initialized just like the other environment variables.
This also means that now, the $HOME Q-Register is always defined
and can be used by platform-agnostic macros.
* FG uses a new kind of tab-completion: for directories only.
It would be annoying to complete the FG command after every
directory, so this tab-completion does not close the command
automatically. Theoretically, it would be possible to close
the command after completing a directory with no subdirectories,
but this is not supported currently.
* Filename arguments are no longer completed with " " if {} escaping
is in place as this brings no benefit. Instead no completion character
is inserted for this escape mode.
* "$" was mapped to the current directory to support an elegant way to
insert/get the current directory.
Also this allows the idiom "[$ FG...new_dir...$ ]$" for changing
the current directory temporarily.
* The Q-Register stack was extended to support restoring the string
part of special Q-Registers (that overwrite the default functionality)
when using the "[$" and "]$" commands.
* fixed minor typos (american spelling)
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out beyond empty arguments
* it was annoying not to be able to rub out anything with ^W if the current string
argument was empty.
* Now, the special file name and string argument handling for ^W is effective
only if the current argument is non-empty, else we fall back to the rub-out-command
behaviour.
* So now, if you press ^W in a string argument, it is rubbed out until empty and
on the next ^W press, the entire command will be rubbed out.
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* the rubout/reinsert-word behaviour of misc. string arguments
is suboptimal for file name arguments as it depends on Scintilla's
word characters.
By default, the directory separators are not considered word
characters, but this could be changed by the user.
* The behaviour of ^W in file name arguments is now fixed and
independant from the Scintilla configuration:
It always rubs out or re-inserts one hierarchy level of the
file name.
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If there was a rubbed out command line and you tab completed
a file name in a string argument (TAB in ^G mode), the immediate
editing modifier was automatically reset.
This still happens if nothing could be tab completed and you
type a few characters and try to complete again (since ^G mode
will be reset). If this feature is used often, the user should perhaps
define a function key as ^G^I^G.
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* fnkeys.tes has been updated to enable the command line
editing macros (cursor keys, etc.) only in the "start" state.
This avoids the annoying effect of inserting the macros
into string arguments where they have no effect and must be
rubbed out again.
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* activated via bit 4 of the ED flag (enabled by default)
* automatic EOL guessing on file loading and translation to LFs.
* works with files that have inconsistent EOL sequences.
* automatic translation to original EOL sequences on file saving
* works with inconsistent EOL sequences in the buffer.
This should usually not happen if the file was read in with
automatic EOL translation enabled.
* also works with the EC and EG commands
* performance is OK, depending on the file being translated.
When reading files with UNIX EOLs, the overhead is minimal
typically-sized files. For DOS EOLs the overhead is larger
but still acceptable.
* Return (line feed) is now an immediate editing command.
This centralizes EOL sequence insertion.
Later, other features like auto-indent could be added to
the editing command.
* get_eol() has been moved to main.cpp (now called
get_eol_seq()
* Warn if file ownership could not be preserved when
saving files.
* IOView has been almost completely rewritten based
on GIOChannels. The EOL translation code is also in IOView.
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* dirname and basename calculations can be done easier with
the new file_get_dirname_len()
* platform-dependant derive_dir_separator() function has been removed
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We used g_path_get_dirname() which does not always return strict prefixes
of the input file name. For file names without directory, it returns "."
(the current directory). This is useful for passing that directory to
functions expecting a proper directory (like g_dir_open()) but was
unsuitable for building file name candidates for autocompletion.
Therefore, we tried to determine if the dirname is a prefix of the filename.
This however failed for "hidden" file names beginning with dot.
All in all it is easier to calculate our own directory name based on
the previously calculated basename than to handle the current-directory
case with g_path_get_dirname(). Now we'll get "" for the current directory,
so we have to handle the empty-string-is-current-dir case.
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* for historic reasons, the backspace key can be transmitted as
^H by the terminal. Some terminal emulators might do that - these
are fixed by this commit.
* Use CTL_KEY('H') instead of standard C '\b' as the former is less
ambiguous given the confusion around the backspace character.
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CTL_KEY_ESC_STR
* the reason for the CTL_KEY() macro is to get the control character
resulting from a CTRL+Key press -- at least this is how SciTECO
presents these key presses.
It is also a macro and may be resolved to a constant expression,
so it can be used in switch-case statements.
Sometimes it is clearer to use standard C escape sequences (like '\t').
* CTL_KEY('[') for escape is hard to read, so I always used '\x1B' which
is even more cryptic.
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* the popup resetting was done after character insertion, so typing
0EB would clear the popup immediately
* the new implementation is functionally equivalent to the
old pre-reinsertion-commandline-handling, by resetting the popup
based on the immediate editing command before insertion
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we are not guaranteed to reach the start parser state
again if the command is not terminated on the rubbed out
command line
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* we cannot prevent GTK from delivering the function key presses,
as we can on Curses. Therefore Cmdline::fnmacro() checks again if
function keys are enabled.
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* this is a Linux/glibc-only optimization
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(also replaces ^T)
* CTRL+G toggles the behaviour of the rubout (Backspace, ^W, ^U) commands:
When the so called immediate editing command modifier is enabled/active,
the rubout commands will do the opposite and insert from the rubbed out
command line.
This command is somewhat similar to Emacs' C-g command.
* The CTRL+G command also replaces the ^T immediate editing command
for auto-completing filenames in any string argument.
Now the TAB key can be used for that purpose after activating the
^G modifier.
^T is a classic TECO command that will be supported sooner or later
by SciTECO, so it's good to have it available directly.
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cleanup/refactoring
* characters rubbed out are not totally removed from the command line,
but only from the *effective* command line.
* The rubbed out command line is displayed after the command line cursor.
On Curses it is grey and underlined.
* When characters are inserted that are on the rubbed out part of the command line,
the cursor simply moves forward.
NOTE: There's currently no immediate editing command for reinserting the
next character/word from the rubbed out command line.
* Characters resulting in errors are no longer simply discarded but rubbed out,
so they will stay in the rubbed out part of the command line, reminding you
which character caused the error.
* Improved Cmdline formatting on Curses UI:
* Asterisk is printed bold
* Control characters are printed in REVERSE style, similar to what
Scinterm does. The controll character formatting has thus been moved
from macro_echo() in cmdline.cpp to the UI implementations.
* Updated the GTK+ UI (UNTESTED): I did only, the most important API
adaptions. The command line still does not use any colors.
* Refactored entire command line handling:
* The command line is now a class (Cmdline), and most functions
in cmdline.cpp have been converted to methods.
* Esp. process_edit_cmd() (now Cmdline::process_edit_cmd()) has been
simplified. There is no longer the possibility of a buffer overflow
because of static insertion buffer sizes
* Cleaned up usage of the cmdline_pos variable (now Cmdline::pc) which
is really a program counter that used a different origin as macro_pc
which was really confusing.
* The new Cmdline class is theoretically 8-bit clean. However all of this
will change again when we introduce Scintilla views for the command line.
* Added 8-bit clean (null-byte aware) versions of QRegisterData::set_string()
and QRegisterData::append_string()
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string-utils.cpp and string-utils.h
* also improved performance of String::append() by using g_realloc()
* added String::append() variant for non-null-terminated strings
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* the ^I command was altered to insert indention characters
rather than plain tabs always.
* The <TAB> immediate editing command was added for all
insertion arguments (I, ^I but also FR and FS)
* documentation was extended for a discussion of indention
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Windows
* this is actually UNTESTED on Windows
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optimized screen refreshing/redrawing
* pressing e.g. TAB when the popup is showing a list of auto-completions
will show the next page, eventually beginning at the first one again.
* do not redraw curses windows in the UI methods directly. this resulted
in flickering during command-line editing macros and ordinary macro calls
because the physical screen was updated immediately.
Instead, window refreshing and updated is done centrally in
event_loop_iter() only after a key has been processed.
Also we use wnoutrefresh() and doupdate() to send as little to the
terminal (emulator) as possible.
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* added platform-dependant file_is_visible() function
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* in batch mode, Scintilla undo actions are simply leaked memory
* Since we have more than one Scintilla view now, we must empty
the undo buffer of all scintilla views when a command line is committed ($$)
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* implements the same globbing as the EB command already did
* uses Globber helper class that behaves more like UNIX glob().
glib only has a glob-style pattern matcher.
* The Globber class may be extended later to provide more
UNIX-like globbing.
* lexer.tes has been updated to make use of globbing.
Now, lexers can be automatically loaded and registered at
startup. To install a new lexer, it's sufficient to copy
a file to the lexers/ directory.
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the QUIT hook is actually not that trivial and required
some architectural changes.
First, the QUIT hook execution and any error that might
occurr cannot always be attached to an existing error stack
frame. Thereforce, to give a stack frame for QUIT hooks and
to improve the readability of error traces for ED hooks in general,
a special EDHookFrame is added to every ED hook execution error.
Secondly, since QUIT hooks can themselves throw errors, we cannot
run it from an atexit() handler. Instead it's always called manually
before __successful__ program termination. An error in a QUIT hook
will result in a failure return code nevertheless.
Thirdly, errors in QUIT hooks should not prevent program termination
(in interactive mode), therefore they are only invoked from main()
and always in batch mode. I.e. if the interactive mode is terminated
(EX$$), SciTECO will switch back to batch mode and run the QUIT
hook there. This is also symmetric to program startup, which is
always in batch mode.
This means that Interface::event_loop() no longer runs indefinitely.
If it returns, this signals that the interface shut down and
batch mode may be restored by SciTECO.
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Template Pattern.
* without the one-view-per-buffer designs, many Scintilla send message (SSM)
calls could be inlined
* with the new design, this was no longer possible using the abstract
base classes. the CRT pattern allows inlining again but introduces
a strange level of code obscurity.
* tests suggest that at high optimization levels, the one-view-per-buffer
design and the CRT pattern reduces typical macro runtimes by 30%
(e.g. for symbols-extract.tes).
* only updated the NCurses UI for the time being
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* the GError expection has been renamed to GlibError, to avoid
nameclashes when working from the SciTECO namespace
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normally, since SciTECO is not a library, this is not strictly
necessary since every library should use proper name prefixes
or namespaces for all global declarations to avoid name clashes.
However
* you cannot always rely on that
* Scintilla does violate the practice of using prefixes or namespaces.
The public APIs are OK, but it does define global functions/methods,
e.g. for "Document" that clashed with SciTECO's "TECODocument" class at
link-time.
Scintilla can put its definitions in a namespace, but this feature
cannot be easily enabled without patching Scintilla.
* a "SciTECO" namespace will be necessary if "SciTECO" is ever to be
turned into a library. Even if this library will have only a C-linkage
API, it must ensure it doesn't clutter the global namespace.
So the old "TECODocument" class was renamed back to "Document"
(SciTECO::Document).
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behaves just like ^T in string arguments.
later we might add special Bash-completion support
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