Two api methods for lua scripting has been added.
`reload()` allows to refresh the document without triggering a new
html request. This commits expose that existing internal function to the
lua api.
One example where it is useful : making a lua hook that allows to edit a
local file we're browsing and see the change without having to perform a
full reload (thus losing the scrolling position). Or anything else that
allows to interactively modify the currently loaded document.
`goto_url()` allows to navigate to given url long after the page has been
loaded (so follow_url_hooks can't be used).
Example where it's useful : binding a key to load the latest archive.org
snapshot for current page (especially useful when using tor and being
constantly harassed by cloudflare).
Replace JS_EncodeString by jsval_to_string. It will allow easier
changes in the future. In smjs nullptr everywhere.
In ecmascript arrays don't work. For example
document.getElementsByTagName("H1")[0]
smjs even does not start.
Plan is to bump mozjs version, and later back to fixing bugs.
SpiderMonkey was updated to mozjs24. If you want to build elinks
with ecmascript support, you must compile using g++ with -fpermissive .
There is a lot of warnings.
There are some memleaks in ecmascript code, especially related to JSAutoCompartment.
I don't know yet, where and how to free it.
Debian does not support mozjs24, so I'm going to gradually update SpiderMonkey version.
Once to utf-8 before pre_format_html_hook, and second time to the original encoding after python
script execution. I know it is inefficient, but computers are quite fast nowadays.
Fixes the errors
x86_64-pc-linux-gnu-ld: hooks.o:(.bss+0x0): multiple definition of `erb_module'; core.o:(.bss+0x0): first defined here
x86_64-pc-linux-gnu-ld: ruby.o:(.bss+0x0): multiple definition of `erb_module'; core.o:(.bss+0x0): first defined here
Bug: https://bugs.gentoo.org/730658
Weak points:
- alignof
- js problems
Todo:
- make js work with C++ and mozjs-17
- then mozjs-24
- then mozjs-52
- then mozjs-60
- decrease number of warnings
By default some Python warning messages would be written to standard error
by the interpreter. To prevent these warnings from making a mess of the
ELinks screen, all warnings were turned into exceptions so they could be
caught and displayed through the usual report_scripting_error() mechanism.
With Python 3.2, this approach backfires: A new class of ResourceWarnings
that are filtered by default (and hence would *not* have been written to
standard error) are now turned into exceptions, and these exceptions can't
be caught because they're emitted from the interpreter's cleanup code. As
a result, the uncaught exceptions would make a mess of the ELinks screen.
The new solution is to replace Python's standard library function
warnings.showwarning() with one that turns warning messages into exceptions.
This means we'll wait until a warning would have been written to standard
error before turning it into an exception, so other warnings that would
never have reached that point because they're filtered will remain unseen.
(The behavior of warning messages is described in the documentation for
the "warnings" module from Python's standard library.)
Partially revert commits
a1c5fe51 (2011-05-08) bookmark_folder_get_property: xulrunner-2.0 fix
e86ec567 (2012-03-04) Compilation fixes (--enable-debug)
jsval_to_bookmark_string once again takes jsval val, rather than jsid id.
This way, bookmark_set_property does not have to call JS_ValueToId,
which would needlessly intern the new string value of the property,
i.e. the title or the URI. Instead, bookmark_folder_get_property
has to call JS_IdToValue.
l_set_option() was passing the address of an int to
option_types[OPT_INT].set and option_types[OPT_BOOL].set.
That looks correct but is not: both function pointers
point to num_set(), which actually reads *(long *) str.
Change l_set_option() to pass the address of a long instead,
and add comments about this dependency.
(cherry picked from elinks-0.11 commit 8766e3829f)
(cherry picked from elinks-0.12 commit 0797f04921)
(cherry picked from elinks-0.12 commit 51dc3beee7)
Conflicts:
NEWS: Both 0.12pre5.GIT and 0.13.GIT had inserted a new section.
src/terminal/window.c: Both had inserted a new function.
Add terminal_class, which defines a JSObject wrapper for struct terminal.
Add terminal_array_class, which defines a JSObject wrapper for accessing
the "terminals" linked list of struct terminal.
Add session_array_class, which defines a JSObject wrapper for accessing the
tabs (sessions) of a terminal.
Add pointers from struct terminal to the terminal_class object and
the session_array_class object.
Add terminal_props and terminal_get_property for terminal_class.
Add terminal_finalize, which clears the pointers between a struct terminal
and the JSObject wrapper in question.
Add smjs_init_terminal_interface, which creates a terminal_array_class
instance and assigns it to the "terminal" property on the "elinks" object.
Call smjs_init_terminal_interface from smjs_init_elinks_object.
Add smjs_get_terminal_object and smjs_get_session_array_object to get
the wrapper objects for a given struct terminal, and add
smjs_get_terminal_array_object to get a terminal_array_class object.
Add smjs_detach_terminal_object and smjs_detach_session_array_object, which
clear the pointers between a given struct terminal and its JSObject
wrappers.
Add terminal_array_get_property for terminal_array_class.
Add session_array_get_property for session_array_class.
Add session_class, which defines a JSObject wrapper for struct session.
Add location_array_class, which defines a JSObject wrapper for struct
ses_history. The "history" member of struct session is a struct
ses_history, which is a linked list of struct location.
Add a pointer from struct session to the session_class object and the
location_array object.
Add smjs_get_session_object to return a session_class JSObject wrapper for
a given struct session.
Add smjs_get_session_location_array_object to return a location_array_class
JSObject wrapper for a given struct session.
Add "session" property to the "elinks" object, which uses
smjs_get_session_object to get a JSObject wrapper for smjs_ses.
Add smjs_location_array_get_property, which allows indexing
a location_array object using a positive number for history forward or
a negative number for history backward.
Add session_props, session_get_property, session_set_property,
session_funcs, smjs_session_goto_url (which implements the "goto" method),
and smjs_init_session_interface for session_class.
Add session_construct, which creates a new tab and returns the JSObject
session_class wrapper.
Add session_finalize and smjs_location_array_finalize, which clear the
pointers between struct session and the JSObject wrappers in question.
Add smjs_detach_session_object, which clears the pointers between a given
struct session and the corresponding JSObject wrappers.
In destroy_session, call smjs_detach_session_object.
Add jsval_to_object helper in ecmascript/spidermonkey/util.h;
jsval_to_object is used in smjs_session_goto_url.
Modify delayed_goto_uri_frame to allow the target to be NULL.
smjs_session_goto_url needs this modification.
Currently, it is possible for the JSObject that wraps a struct view_state
to outlive the view_state. Using the properties of the JSObject wrapper
will then cause a crash.
This patch adds a smjs_detach_view_state_object function, which is called
in destroy_vs, to dissociate the struct view_state from the JSObject
wrapper. To this end, the patch modifies the struct view_state to point
the JSObject wrapper. smjs_get_view_state_object will use this pointer
if it is set, and copy_vs will copy this pointer to the new view_state.
The patch also modifies view_state_get_property and
view_state_set_property to return immediately if the view_state has been
destroyed. Finally, the patch adds a finalizer (view_state_finalize)
that clears the pointer from the struct view_state to the JSObject.
After recent simplifications, the jsobj variable is no longer necessary.
Instead of assigning it a value and then returning it, just return the
value that was being assigned to it.
Add elinks_get_property and elinks_set_property functions and
a JSPropertySpec elinks_props table to handle properties rather than
defining eilnks_get_home, elinks_get_location, and elinks_set_location
and adding them individually to the class using JS_DefineProperty.
This approach will make it easier to add further properties.
Currently, elinks_alert assumes that smjs_ses is not NULL and crashes if
it is. Change elinks_alert to check whether smjs_term is NULL, try
get_default_terminal if so, and fall back on printing to stderr using
usrerror if no terminal is found.
In smjs_load_uri, check whether the the given URI string is empty. If it
is, return JS_FALSE right away rather than continuing on and passing
get_uri an empty string, which triggers an assertion failure later on.
Currently, using smjs_load_uri on javascript: URIs cause an assertion
failure in run_connection because smjs_load_uri uses
get_protocol_handler to find the handler and asserts that the returned
handler is not NULL, but get_protocol_handler returns NULL for
javascript: URIs.
In smjs_load_uri, if the given URI has a protocol for which some
external handler is defined, immediately return JS_FALSE because
smjs_load_uri implements an asynchronous operation, and we cannot
reasonably carry out the operation and callback with an external
handler.
In bookmark_folder_get_property, convert the jsid value into
a jsval value before passing it to jsval_to_bookmark_string.
This commit fixes a bug in the xulrunner-2.0 compatibility changes
of commit 2844f8b715, which rendered
the bookmarks scripting interface for SpiderMonkey nonfunctional.
Introduce and use ses_kbd_repeat_count to change
ses->kbdprefix.repeat_count instead of setting it directly.
This change should not cause any change in behaviour.
Perhaps because of bug 981, if one opened hundreds of pages with
elinks --remote openURL(...), then ELinks 0.11.4 could crash with a
SIGSEGV in JS_InitClass called from spidermonkey_get_interpreter.
SpiderMonkey ran out of memory and began returning NULL and JS_FALSE
but ELinks didn't notice them and pressed on. Add some checks to
avoid the crash, although the underlying out-of-memory error remains.
This reverts commit b94657869b.
I don't know where I got the idea that JS_SetErrorReporter affects the
entire JSRuntime, rather than only the provided JSContext. The people
on #jsapi say it has never worked that way.
In utf8_to_jsstring, do not free the string that is passed to
JS_NewUCString if the latter is successful; if it is, SpiderMonkey
handles the memory from then on.
Use libc routines instead of ELinks's routines to allocate and free the
string so that ELinks's memory debugging code does not try to keep track
of it after it has been handed to SpiderMonkey.
This commit fixes a bug introdued in
97d72d15a0.
In utf8_to_jsstring, do not free the string that is passed to
JS_NewUCString if the latter is successful; if it is, SpiderMonkey
handles the memory from then on.
Use libc routines instead of ELinks's routines to allocate and free the
string so that ELinks's memory debugging code does not try to keep track
of it after it has been handed to SpiderMonkey.
This commit fixes a bug introdued in
97d72d15a0.
Debian libmozjs-dev 1.9.0.4-2 has JS_ReportAllocationOverflow but
js-1.7.0 reportedly hasn't. Check at configure time whether that
function is available. If not, use JS_ReportOutOfMemory instead.
Reported by Witold Filipczyk.
When setting the title or URL of a bookmark from SMJS user scripting,
use update_bookmark() instead of writing directly to struct bookmark.
It triggers the bookmark-update event and sets the bookmarks_dirty
flag.
SpiderMonkey uses UTF-16 and the strings in struct bookmark are in
UTF-8. Previously, the conversions behaved as if the strings had been
in ISO-8859-1.
SpiderMonkey also supports JS_SetCStringsAreUTF8(), which would make
the existing functions convert between UTF-16 and UTF-8, but that
effect is global so I dare not enable it yet. Besides, I don't know
if that function works in all the SpiderMonkey versions that ELinks
claims to work with.
Except if they have external handlers.
When ELinks receives an event from a terminal, move that terminal to
the beginning of the global "terminals" list, so that the terminals
are always sorted according to the time of the most recent use. Note,
this affects the numbering of bookmark folders in session snapshots.
Add get_default_terminal(), which returns the most recently used
terminal that is still open. Use that in various places that
previously used terminals.prev or terminals.next. Four functions
fetch the size of the terminal for User-Agent headers, and
get_default_terminal() is not really right, but neither was the
original code; add TODO comments in those functions.
When the user chooses "Background and Notify", associate the download
with the terminal where the dialog box is. So any later messages will
then appear in that terminal, if it is still open. However, don't
change the terminal if the download has an external handler.
When a download gets some data, don't immediately check the associated
terminal. Instead, wait for the download to end. Then, if the
terminal of the download has been closed, use get_default_terminal()
instead. If there is no default terminal either, just skip any
message boxes.
Previously, spidermonkey_get_interpreter() and init_smjs() each called
JS_SetErrorReporter on the JSContexts they created. However,
JS_SetErrorReporter actually sets the error reporter of the JSRuntime
associated with the JSContext, and all of our JSContexts use the same
JSRuntime nowadays, so only the error_reporter() of
src/ecmascript/spidermonkey.c was left installed. Because this
error_reporter() asserts that JS_GetContextPrivate(ctx) returns a
non-NULL pointer, and init_smjs() does not set a private pointer for
smjs_ctx, any error in smjs_ctx could cause an assertion failure, at
least in principle.
Fix this by making spidermonkey_runtime_addref() install a shared
error_reporter() when it creates the JSRuntime and the first JSContext.
The shared error_reporter() then checks the JSContext and calls the
appropriate function.
The two error reporters are quite similar with each other. In the
future, we could move the common code into shared functions. I'm not
doing that yet though, because fixing the bug doesn't require it.
Rename src/ecmascript/spidermonkey/util.c to
src/ecmascript/spidermonkey-shared.c and compile it also when
CONFIG_SCRIPTING_SMJS is enabled but CONFIG_ECMASCRIPT_SPIDERMONKEY is
not. Then use its functions from src/scripting/smjs/ too. Move the
corresponding declarations, as well as the inline functions needed by
src/scripting/smjs/, from src/ecmascript/spidermonkey/util.h to
src/ecmascript/spidermonkey-shared.h.
ELinks is nowadays using two JSRuntimes and SpiderMonkey has bugs that
make it crash in such use. To work around them, ELinks will need to
be changed to use only one JSRuntime. I am planning to define and
initialize that JSRuntime in src/ecmascript/spidermonkey-shared.c,
now that it's compiled whenever either of the modules is enabled.
JS_CallFunction does not support closures in SpiderMonkey versions
earlier than 1.8. Test case:
elinks.keymaps.main["\""] = function() {
elinks.keymaps.main["e"] = function() {
elinks.alert("hello!");
};
}
JS_CallFunction does not support closures in SpiderMonkey versions
earlier than 1.8. Test case:
function set_suffix(suffix) {
elinks.preformat_html = function(cached, vs) {
cached.content += suffix;
}
}
set_suffix("hello");
JS_CallFunction does not support closures in SpiderMonkey versions
earlier than 1.8. Test case:
elinks.keymaps.main["!"] = function() {
elinks.load_uri("http://www.eldar.org/cgi-bin/fortune.pl?text_format=yes",
function (cached) { elinks.alert(cached.content); });
}
elinks.keymaps.main["/"] = null;
used to crash ELinks with a segfault in JS_ObjectIsFunction.
Fix that by recognizing JSVAL_NULL explicitly and treating it as "none".
Likewise, if keymap_get_property would return "none" to ECMAScript,
return JSVAL_NULL instead.
This reverts commit c33d195ff4.
ELinks no longer needs to collect garbage in this situation
because it can now free cache entries even if the corresponding
SMJS objects remain.
The SpiderMonkey scripting module handles the "pre-format-html" event
by constructing a JSObject for the struct cache_entry and then calling
elinks.preformat_html(cache_entry, view_state) if such a function
exists. The problem with this was that each such JSObject kept the
struct cache_entry locked until SpiderMonkey garbage-collected the
JSObject, even if the user had not defined an elinks.preformat_html
function and the JSObject was thus never needed at all. To work
around that, the SpiderMonkey scripting module ran a garbage
collection whenever the user told ELinks to flush caches.
Remove the SpiderMonkey scripting module's use of object_lock and
object_unlock on struct cache_entry, and instead make the pointers
weak so that ELinks can free the cache_entry whenever it wants even if
a JSObject is pointing to it. Each cache_entry now has a pointer back
to the JSObject; done_cache_entry calls smjs_detach_cache_entry_object,
which follows the pointer and detaches the cache_entry and the JSObject
from each other.
This commit does not yet remove the workaround mentioned above.
