This builds upon the GtkTextHistory helper to provide undo and redo support
for the GtkTextView widget and GtkTextBuffer object.
You can undo/redo using familiar shortcuts such as Primary+Z,
Primary+Shift+Z, ad Primary+Y.
Developers that wish to disable undo, should set the
GtkTextBuffer:enable-undo property to FALSE.
You can wrap irreversible actions
gtk_text_buffer_begin_irreversible_action() and
gtk_text_buffer_end_irreversible_action(). This will cause the undo stack
to drop all undo/redo actions and the changes made between them will be
the "initial state" of the buffer.
Calling gtk_text_buffer_set_text() will do this automatically for you.
This function is not useful. Every icon theme
on my system either does not have that field,
or has it as 'folder'. So, just use 'folder'
when you need an example icon.
This creates a new GtkTextViewChild that can manage overlay children at
given x,y offsets in buffer coordinates. This simplifies GtkTextView by
extracting this from GtkTextWindow as well as providing a real widget for
the borders.
With this change, we also rename gtk_text_view_add_child_in_window() to
gtk_text_view_add_overlay(). For those that were using
GTK_TEXT_WINDOW_WIDGET, they can use a GtkOverlay. It does not appear
that anyone was using GTK_TEXT_WINDOW_(LEFT|RIGHT|TOP|BOTTOM) for widgets
in this fashion, but that can be done by setting a gutter widget with
gtk_text_view_set_gutter(). We can make GtkTextViewChild public if
necessary to simplify this should it become necessary.
GtkTextViewChild will setup a CSS node of either "text" or "border"
depending on the GtkTextWindowType.
The old GtkTextViewChild has been renamed to AnchoredChild as it is only
used for widgets with anchors in the GtkTextBuffer. This also removes the
use of allocated GSList and instead embeds a GQueue and GList to save a
few extraneous allocations.
The renaming of this function doesn't make much since because the window
is the GtkTextWindowType, not GdkWindow specifically. So we can keep the
old name which is closer to the proper meaning and less code for consumers
to change when porting to 4.x.
The documentation stated:
GTK is a library.… GTK depends on the following libraries:
GTK The GTK library itself contains widgets, that is, GUI
components such as GtkButton or GtkTextView.
There is no point in stating, that the GTK library
depends on the GTK library.
I recently turned gtk_widget_activate_action()
into a varargs function. That is more convenient
from C, but we need a non-varargs variant for
bindings. So add the old API back, under the
name gtk_widget_activate_action_variant(),
with a rename-to annotation.
The migration from GdkScreen's monitor API to GdkMonitor left out a way
to get the connector's name of a monitor.
While there's no real guarantee coming from the underlying graphics
system that the connector's name is stable, some system components may
use it to uniquely identify a monitor until the next plug in/out event.
The only cases of stateful actions we've seen
so far have been boolean properties, and we
don't really want to add much state handling
API, so lets just go with property actions
for now.
Adapt the only user in GtkText.
Add a facility to register and install actions
at class init time. The intended use for these
actions is for
a) context and other model-based menus
b) key bindings
Most of these actions are going to be stateless,
so add separate apis for the simple and stateful
cases.
We avoid creating an action group for these by
teaching the action muxer about these actions.
The action muxer also maintains the enabled
state for these actions.
Drop the ::populate-popup signal and implement
the new context menu api. Things are a bit more
complicated here, since we have different menus
on links and selectable text.
