forked from AuroraMiddleware/gtk
faa9ef2dc0
This is a convenience method for the common case that symbols are used under their own name.
130 lines
5.8 KiB
C
130 lines
5.8 KiB
C
/*
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* Copyright © 2019 Benjamin Otte
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#ifndef __GTK_BUILDER_SCOPE_H__
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#define __GTK_BUILDER_SCOPE_H__
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#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
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#error "Only <gtk/gtk.h> can be included directly."
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#endif
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#include <gtk/gtktypes.h>
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G_BEGIN_DECLS
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#define GTK_TYPE_BUILDER_SCOPE (gtk_builder_scope_get_type ())
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GDK_AVAILABLE_IN_ALL
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G_DECLARE_INTERFACE (GtkBuilderScope, gtk_builder_scope, GTK, BUILDER_SCOPE, GObject)
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/**
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* GtkBuilderClosureFlags:
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* @GTK_BUILDER_CLOSURE_SWAPPED: The closure should be created swapped. See
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* g_cclosure_new_swap() for details.
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*
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* The list of flags that can be passed to gtk_builder_create_closure().
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*
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* New values may be added in the future for new features, so external
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* implementations of [iface@Gtk.BuilderScope] should test the flags
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* for unknown values and raise a %GTK_BUILDER_ERROR_INVALID_ATTRIBUTE error
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* when they encounter one.
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*/
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typedef enum { /*< prefix=GTK_BUILDER_CLOSURE >*/
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GTK_BUILDER_CLOSURE_SWAPPED = (1 << 0)
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} GtkBuilderClosureFlags;
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/**
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* GtkBuilderScopeInterface:
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* @get_type_from_name: Try to lookup a `GType` via the its name. See
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* gtk_builder_get_type_from_name() for more details.
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* The C implementation will use g_type_from_name() and if that fails try to guess the
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* correct function name for registering the type and then use dlsym() to load it.
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* The default implementation just tries g_type_from_name() and otherwise fails.
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* @get_type_from_function: Try to lookup a `GType` via the given function name, specified
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* explicitly in a GtkBuilder file, like via the "type-func" attribute in the "<object>" tag.
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* This function is very rarely used.
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* The C implementation will use dlsym() and call the resulting function as a `GTypeFunc`.
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* The default implementation will fail and just return %G_TYPE_INVALID.
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* @create_closure: Create a closure with the given arguments. See gtk_builder_create_closure()
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* for more details on those.
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* The C implementation will try to use dlsym() to locate the function name and then
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* g_cclosure_new() to create a closure for the symbol.
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* The default implementation just fails and returns %NULL.
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*
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* The virtual function table to implement for `GtkBuilderScope` implementations.
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* Default implementations for each function do exist, but they usually just fail,
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* so it is suggested that implementations implement all of them.
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*/
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struct _GtkBuilderScopeInterface
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{
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/*< private >*/
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GTypeInterface g_iface;
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/*< public >*/
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GType (* get_type_from_name) (GtkBuilderScope *self,
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GtkBuilder *builder,
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const char *type_name);
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GType (* get_type_from_function) (GtkBuilderScope *self,
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GtkBuilder *builder,
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const char *function_name);
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GClosure * (* create_closure) (GtkBuilderScope *self,
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GtkBuilder *builder,
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const char *function_name,
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GtkBuilderClosureFlags flags,
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GObject *object,
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GError **error);
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};
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struct _GtkBuilderCScopeClass
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{
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GObjectClass parent_class;
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};
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#define GTK_TYPE_BUILDER_CSCOPE (gtk_builder_cscope_get_type ())
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GDK_AVAILABLE_IN_ALL
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G_DECLARE_DERIVABLE_TYPE (GtkBuilderCScope, gtk_builder_cscope, GTK, BUILDER_CSCOPE, GObject)
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GDK_AVAILABLE_IN_ALL
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GtkBuilderScope * gtk_builder_cscope_new (void);
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GDK_AVAILABLE_IN_ALL
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void gtk_builder_cscope_add_callback_symbol (GtkBuilderCScope *self,
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const char *callback_name,
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GCallback callback_symbol);
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GDK_AVAILABLE_IN_ALL
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void gtk_builder_cscope_add_callback_symbols (GtkBuilderCScope *self,
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const char *first_callback_name,
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GCallback first_callback_symbol,
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...) G_GNUC_NULL_TERMINATED;
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#define gtk_builder_cscope_add_callback(scope, callback) \
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gtk_builder_cscope_add_callback_symbol (GTK_BUILDER_CSCOPE (scope), #callback, G_CALLBACK (callback))
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GDK_AVAILABLE_IN_ALL
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GCallback gtk_builder_cscope_lookup_callback_symbol(GtkBuilderCScope *self,
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const char *callback_name);
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G_END_DECLS
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#endif /* __GTK_BUILDER_SCOPE_H__ */
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