Virtualize a lot of functions and move their code into the default
implementation. Also connect to changes of the "path" property and
reload data automatically when the path changes. Add "wait" method
which is by default empty but is to be implemented by fonts.
(cherry picked from commit 01e4104236)
Make sure gimp_async_set_wait() and gimp_async_set_cancel() work
correctly, even if the set changes in nontrivial ways as a result
of waiting-on/canceling individual operations. This is purely
theoretic right now, but why not.
(cherry picked from commit ec5f4d03fa)
Increase the percision of the "position" property of
guides-new-percent.scm to two decimal places. Currently, it only
accepts integers, which limits its accuracy to 100px.
(cherry picked from commit 8e6a5298c1)
Add support for exponentiation (using the ^ operator) to eevl.
This is occasionally useful, e.g., in geometrically-derived
quantities involving square roots.
(cherry picked from commit 8d35299410)
This is mostly core code which we want to keep in sync with master as
long as possible, so I picked this one even though not strictly
neccessary.
(cherry picked from commit 1b7d63cce9)
When font loading is finished, restore the font list in the
corresponding async completion callback, and not in the
"notify::empty" signal handler of the fonts async set
This solves a problem arising when gimp_fonts_wait() is called
*inside* a "notify::empty" signal handler, emitted when reloading
fonts (causing the "empty" property of the fonts async set to
switch from TRUE to FALSE): When the wait is over, "empty" will
switch back from FALSE to TRUE, however, since the "notify" signal
is non-recursive, the corresponding handler will not be called,
gimp_fonts_wait() will return *before* the font list is restored,
and the caller will see an empty font list. This can happen under
certain circumstances when reloading fonts while the text tool is
active.
(cherry picked from commit 0e19f159f5)
... Windows.
Reviewer note (Jehan): I have not built on Windows because I need to
refresh my crossbuild environment, but it looks sane enough, and Gil
previously did good patches. I push as-is, hoping it still builds fine
on Windows. :-)
(cherry picked from commit 2caa400a96)
In the threshold and levels tools, use gimp_wait() to wait for
histogram calculation to complete before applying auto-adjustment,
so that a message is displayed in the meantime. Allow the
operation to be canceled, in which case we simply abort the auto-
adjustment, but let the histogram calculation continue.
Use gimp_fonts_wait(), added in the previous commit, to wait for
fonts to finish loading before operations that depend on font
availability. In particular, this includes font- and text-related
PDB functions, and text-layer rendering.
... which waits for font-loading to complete, using gimp_wait() to
show a message while waiting.
Note that we don't currently allow the wait to be canceled, since
it may have unpredictable effects on plug-ins, but the interface is
such that the wait might not complete, so calling code should be
prepared for that.
Add a GimpGui::wait() virtual function, and a corresponding
gimp_wait() function. The function takes an object implementing
the GimpWaitable interface, and a printf-style message, and waits
for the object to become ready, displaying the message as
indication in the meantime. The default implementation simply
prints the message to STDERR.
Implement the function in gui-vtable, using the busy-dialog plug-
in added in the previous commit, to display the message in a
dialog. Additionally, if the object implements the GimpCancelable
interface, provide a "cancel" button in the dialog, which, when
pressed, causes gimp_cancelable_cancel() to be called on the
object. Note that the function keeps waiting on the object even
after requesting cancelation; GimpTriviallyCancelableWaitable can
be used to stop the wait once cancelation has been requested.
This plug-in is used internally to show an interactive dialog in a
separate process, while the main process is blocking waiting for an
operation to complete. The dialog shows a custom message in a
GimpBusyBox, and potentially a "cancel" button, allowing the
operation to be canceled. Communication with the main process is
performed through a pair of file descriptors, passed to the plug-in
as arguments.
Pass the current icon theme directory to plug-ins through the
config message, and add a gimp_icon_theme_dir() libgimp function
for retrieving it. Note that we already have a similar
gimp_icon_get_theme_dir() PDB function, which we keep around, since
it can be used to dynamically query for the current icon dir,
unlike the former, and since it returns a dynamically-allocated
string, while the rest of the config-related functions return
statically allocated strings.
Use the new function, instead of gimp_get_icon_theme_dir(), in
gimp_ui_init(). This allows gimp_ui_init() to run without making
any PDB calls. Consequently, this allows us to start plug-ins that
call gimp_ui_init() without entering the main loop in the main app.
We're going to add a plug-in that displays an interactive dialog
while the main app is blocking waiting for an operation to
complete, and we need to be able to start the plug-in without
entering the main loop, to avoid the possibility of arbitrary code
being executed during the wait.
Bump the protocol version.
While fonts are loading, show a GimpBusyBox with an appropriate
message above the text tool options, and make the options
themselves insensitive, and in font views, such as in the fonts
dialog (through gimp_container_editor_bind_to_async_set(), added in
the previous commit).
... which takes a GimpAsyncSet and a message, and shows a
GimpBusyBox with that message, instead of the container view, while
the async set is nonempty.
We're going to use this for font-loading indication in font views,
such as in the fonts dialog.
GimpBusyBox is used to show a message indicating an operation is in
progress. It's basically just a spinner and a label, with some
styling.
We're going to use it both in app/ and in a plug-in.
We already avoid rendering text layers while fonts are loading,
showing an appropriate message, but this will soon be replaced with
waiting for the fonts to finish loading.
Instead, don't allow the text tool to start at all while the fonts
are loading (showing an appropriate tool message, and a BAD cursor
modifier), and halt the tool when reloading fonts if it's already
started.
Replace the boolean fonts_loading member of Gimp with
fonts_async_set, which is a GimpAsyncSet object. This allows us
to easily respond to the completion of font loading and reloading,
as will be done in the next commits.
Additionally, move the call to FcConfigSetCurrent(), used to
activate the loaded font configuration, from the async thread to
the main thread, just to be on the safe side, and avoid calling
FcInitReinitialize() in gimp_fonts_reset() if font loading is still
in progress, which is unsafe.
GimpAsyncSet represents a dynamic set of running GimpAsync objects.
The objects are automatically removed from the set once they're
synced.
GimpAsyncSet implements the GimpWaitable and GimpCancelable
interfaces, allowing the entire set to be waited-on or canceled.
Additionally, GimpAsyncSet provides an "empty" property, which
indicates whether the set is empty or not. This allows responding
to the completion of all the GimpAsync objects through the set's
"notify::empty" signal, or drive UI changes through property
bindings.
GimpTriviallyCancelableWaitable is a proxy object for another
GimpWaitable object, implementing both the GimpWaitable interface
and the GimpCancelable interface. While waiting on the proxy
simply waits on the underlying waitable, canceling the proxy
doesn't affect the underlying waitable, even if it implements
the GimpCancelable interface as well, but rather causes subsequent
wait operations on the proxy to successfully complete immediately.
This essentially causes cancelation to abort only the wait, rather
than the underlying operation.
GimpUncancelableWaitable is a simple proxy object for another
GimpWaitable object, implementing only the GimpWaitable interface.
Its main purpose is to mask away the cancelability of an object
implementing both GimpWaitable and GimpCancelable.
In gimp_parallel_run_async(), lower the priority of threads
executing independent async operations. Independent operations
are generally potentially long-standing background tasks, which we
don't want to bog down the rest of the program.
This is currently only implemented on Linux and Windows.
