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22ba4411cc
Using the generic marshaller has drawbacks beyond performance. One such drawback is that it breaks the stack unwinding from the Linux kernel due to having unsufficient data to walk past ffi_call_unixt64. That means that performance profiling by application developers looks grouped among seemingly unrelated code paths. While we can't fix the kernel unwinding here, we can provide proper c_marshallers and va_marshallers for objects within Gio so that performance profiling of applications is more reliable. Related to GNOME/Initiatives#10
1007 lines
29 KiB
C
1007 lines
29 KiB
C
/*
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* Copyright © 2011 Canonical Ltd.
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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, but
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* 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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* Author: Ryan Lortie <desrt@desrt.ca>
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*/
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#include "config.h"
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#include "gmenumodel.h"
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#include "glibintl.h"
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#include "gmarshal-internal.h"
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/**
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* SECTION:gmenumodel
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* @title: GMenuModel
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* @short_description: An abstract class representing the contents of a menu
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* @include: gio/gio.h
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* @see_also: #GActionGroup
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*
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* #GMenuModel represents the contents of a menu -- an ordered list of
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* menu items. The items are associated with actions, which can be
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* activated through them. Items can be grouped in sections, and may
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* have submenus associated with them. Both items and sections usually
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* have some representation data, such as labels or icons. The type of
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* the associated action (ie whether it is stateful, and what kind of
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* state it has) can influence the representation of the item.
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*
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* The conceptual model of menus in #GMenuModel is hierarchical:
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* sections and submenus are again represented by #GMenuModels.
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* Menus themselves do not define their own roles. Rather, the role
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* of a particular #GMenuModel is defined by the item that references
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* it (or, in the case of the 'root' menu, is defined by the context
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* in which it is used).
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*
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* As an example, consider the visible portions of this menu:
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*
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* ## An example menu # {#menu-example}
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*
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* 
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*
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* There are 8 "menus" visible in the screenshot: one menubar, two
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* submenus and 5 sections:
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*
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* - the toplevel menubar (containing 4 items)
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* - the View submenu (containing 3 sections)
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* - the first section of the View submenu (containing 2 items)
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* - the second section of the View submenu (containing 1 item)
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* - the final section of the View submenu (containing 1 item)
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* - the Highlight Mode submenu (containing 2 sections)
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* - the Sources section (containing 2 items)
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* - the Markup section (containing 2 items)
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*
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* The [example][menu-model] illustrates the conceptual connection between
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* these 8 menus. Each large block in the figure represents a menu and the
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* smaller blocks within the large block represent items in that menu. Some
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* items contain references to other menus.
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*
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* ## A menu example # {#menu-model}
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*
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* 
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*
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* Notice that the separators visible in the [example][menu-example]
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* appear nowhere in the [menu model][menu-model]. This is because
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* separators are not explicitly represented in the menu model. Instead,
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* a separator is inserted between any two non-empty sections of a menu.
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* Section items can have labels just like any other item. In that case,
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* a display system may show a section header instead of a separator.
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*
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* The motivation for this abstract model of application controls is
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* that modern user interfaces tend to make these controls available
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* outside the application. Examples include global menus, jumplists,
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* dash boards, etc. To support such uses, it is necessary to 'export'
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* information about actions and their representation in menus, which
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* is exactly what the [GActionGroup exporter][gio-GActionGroup-exporter]
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* and the [GMenuModel exporter][gio-GMenuModel-exporter] do for
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* #GActionGroup and #GMenuModel. The client-side counterparts to
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* make use of the exported information are #GDBusActionGroup and
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* #GDBusMenuModel.
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*
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* The API of #GMenuModel is very generic, with iterators for the
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* attributes and links of an item, see g_menu_model_iterate_item_attributes()
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* and g_menu_model_iterate_item_links(). The 'standard' attributes and
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* link types have predefined names: %G_MENU_ATTRIBUTE_LABEL,
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* %G_MENU_ATTRIBUTE_ACTION, %G_MENU_ATTRIBUTE_TARGET, %G_MENU_LINK_SECTION
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* and %G_MENU_LINK_SUBMENU.
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*
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* Items in a #GMenuModel represent active controls if they refer to
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* an action that can get activated when the user interacts with the
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* menu item. The reference to the action is encoded by the string id
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* in the %G_MENU_ATTRIBUTE_ACTION attribute. An action id uniquely
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* identifies an action in an action group. Which action group(s) provide
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* actions depends on the context in which the menu model is used.
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* E.g. when the model is exported as the application menu of a
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* #GtkApplication, actions can be application-wide or window-specific
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* (and thus come from two different action groups). By convention, the
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* application-wide actions have names that start with "app.", while the
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* names of window-specific actions start with "win.".
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*
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* While a wide variety of stateful actions is possible, the following
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* is the minimum that is expected to be supported by all users of exported
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* menu information:
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* - an action with no parameter type and no state
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* - an action with no parameter type and boolean state
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* - an action with string parameter type and string state
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*
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* ## Stateless
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*
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* A stateless action typically corresponds to an ordinary menu item.
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*
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* Selecting such a menu item will activate the action (with no parameter).
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*
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* ## Boolean State
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*
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* An action with a boolean state will most typically be used with a "toggle"
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* or "switch" menu item. The state can be set directly, but activating the
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* action (with no parameter) results in the state being toggled.
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*
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* Selecting a toggle menu item will activate the action. The menu item should
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* be rendered as "checked" when the state is true.
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*
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* ## String Parameter and State
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*
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* Actions with string parameters and state will most typically be used to
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* represent an enumerated choice over the items available for a group of
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* radio menu items. Activating the action with a string parameter is
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* equivalent to setting that parameter as the state.
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*
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* Radio menu items, in addition to being associated with the action, will
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* have a target value. Selecting that menu item will result in activation
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* of the action with the target value as the parameter. The menu item should
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* be rendered as "selected" when the state of the action is equal to the
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* target value of the menu item.
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*/
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/**
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* GMenuModel:
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*
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* #GMenuModel is an opaque structure type. You must access it using the
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* functions below.
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*
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* Since: 2.32
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*/
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/**
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* GMenuAttributeIter:
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*
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* #GMenuAttributeIter is an opaque structure type. You must access it
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* using the functions below.
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*
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* Since: 2.32
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*/
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/**
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* GMenuLinkIter:
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*
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* #GMenuLinkIter is an opaque structure type. You must access it using
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* the functions below.
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*
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* Since: 2.32
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*/
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typedef struct
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{
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GMenuLinkIter parent_instance;
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GHashTableIter iter;
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GHashTable *table;
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} GMenuLinkHashIter;
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typedef GMenuLinkIterClass GMenuLinkHashIterClass;
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static GType g_menu_link_hash_iter_get_type (void);
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G_DEFINE_TYPE (GMenuLinkHashIter, g_menu_link_hash_iter, G_TYPE_MENU_LINK_ITER)
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static gboolean
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g_menu_link_hash_iter_get_next (GMenuLinkIter *link_iter,
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const gchar **out_name,
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GMenuModel **value)
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{
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GMenuLinkHashIter *iter = (GMenuLinkHashIter *) link_iter;
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gpointer keyptr, valueptr;
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if (!g_hash_table_iter_next (&iter->iter, &keyptr, &valueptr))
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return FALSE;
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*out_name = keyptr;
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*value = g_object_ref (valueptr);
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return TRUE;
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}
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static void
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g_menu_link_hash_iter_finalize (GObject *object)
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{
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GMenuLinkHashIter *iter = (GMenuLinkHashIter *) object;
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g_hash_table_unref (iter->table);
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G_OBJECT_CLASS (g_menu_link_hash_iter_parent_class)
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->finalize (object);
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}
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static void
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g_menu_link_hash_iter_init (GMenuLinkHashIter *iter)
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{
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}
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static void
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g_menu_link_hash_iter_class_init (GMenuLinkHashIterClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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object_class->finalize = g_menu_link_hash_iter_finalize;
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class->get_next = g_menu_link_hash_iter_get_next;
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}
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typedef struct
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{
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GMenuAttributeIter parent_instance;
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GHashTableIter iter;
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GHashTable *table;
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} GMenuAttributeHashIter;
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typedef GMenuAttributeIterClass GMenuAttributeHashIterClass;
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static GType g_menu_attribute_hash_iter_get_type (void);
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G_DEFINE_TYPE (GMenuAttributeHashIter, g_menu_attribute_hash_iter, G_TYPE_MENU_ATTRIBUTE_ITER)
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static gboolean
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g_menu_attribute_hash_iter_get_next (GMenuAttributeIter *attr_iter,
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const gchar **name,
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GVariant **value)
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{
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GMenuAttributeHashIter *iter = (GMenuAttributeHashIter *) attr_iter;
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gpointer keyptr, valueptr;
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if (!g_hash_table_iter_next (&iter->iter, &keyptr, &valueptr))
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return FALSE;
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*name = keyptr;
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*value = g_variant_ref (valueptr);
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return TRUE;
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}
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static void
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g_menu_attribute_hash_iter_finalize (GObject *object)
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{
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GMenuAttributeHashIter *iter = (GMenuAttributeHashIter *) object;
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g_hash_table_unref (iter->table);
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G_OBJECT_CLASS (g_menu_attribute_hash_iter_parent_class)
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->finalize (object);
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}
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static void
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g_menu_attribute_hash_iter_init (GMenuAttributeHashIter *iter)
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{
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}
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static void
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g_menu_attribute_hash_iter_class_init (GMenuAttributeHashIterClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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object_class->finalize = g_menu_attribute_hash_iter_finalize;
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class->get_next = g_menu_attribute_hash_iter_get_next;
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}
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G_DEFINE_ABSTRACT_TYPE (GMenuModel, g_menu_model, G_TYPE_OBJECT)
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static guint g_menu_model_items_changed_signal;
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static GMenuAttributeIter *
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g_menu_model_real_iterate_item_attributes (GMenuModel *model,
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gint item_index)
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{
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GHashTable *table = NULL;
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GMenuAttributeIter *result;
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G_MENU_MODEL_GET_CLASS (model)->get_item_attributes (model, item_index, &table);
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if (table)
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{
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GMenuAttributeHashIter *iter = g_object_new (g_menu_attribute_hash_iter_get_type (), NULL);
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g_hash_table_iter_init (&iter->iter, table);
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iter->table = g_hash_table_ref (table);
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result = G_MENU_ATTRIBUTE_ITER (iter);
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}
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else
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{
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g_critical ("GMenuModel implementation '%s' doesn't override iterate_item_attributes() "
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"and fails to return sane values from get_item_attributes()",
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G_OBJECT_TYPE_NAME (model));
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result = NULL;
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}
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if (table != NULL)
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g_hash_table_unref (table);
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return result;
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}
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static GVariant *
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g_menu_model_real_get_item_attribute_value (GMenuModel *model,
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gint item_index,
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const gchar *attribute,
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const GVariantType *expected_type)
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{
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GHashTable *table = NULL;
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GVariant *value = NULL;
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G_MENU_MODEL_GET_CLASS (model)
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->get_item_attributes (model, item_index, &table);
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if (table != NULL)
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{
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value = g_hash_table_lookup (table, attribute);
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if (value != NULL)
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{
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if (expected_type == NULL || g_variant_is_of_type (value, expected_type))
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value = g_variant_ref (value);
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else
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value = NULL;
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}
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}
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else
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g_assert_not_reached ();
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if (table != NULL)
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g_hash_table_unref (table);
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return value;
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}
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static GMenuLinkIter *
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g_menu_model_real_iterate_item_links (GMenuModel *model,
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gint item_index)
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{
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GHashTable *table = NULL;
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GMenuLinkIter *result;
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G_MENU_MODEL_GET_CLASS (model)
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->get_item_links (model, item_index, &table);
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if (table)
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{
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GMenuLinkHashIter *iter = g_object_new (g_menu_link_hash_iter_get_type (), NULL);
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g_hash_table_iter_init (&iter->iter, table);
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iter->table = g_hash_table_ref (table);
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result = G_MENU_LINK_ITER (iter);
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}
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else
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{
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g_critical ("GMenuModel implementation '%s' doesn't override iterate_item_links() "
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"and fails to return sane values from get_item_links()",
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G_OBJECT_TYPE_NAME (model));
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result = NULL;
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}
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if (table != NULL)
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g_hash_table_unref (table);
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return result;
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}
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static GMenuModel *
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g_menu_model_real_get_item_link (GMenuModel *model,
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gint item_index,
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const gchar *link)
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{
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GHashTable *table = NULL;
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GMenuModel *value = NULL;
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G_MENU_MODEL_GET_CLASS (model)
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->get_item_links (model, item_index, &table);
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if (table != NULL)
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value = g_hash_table_lookup (table, link);
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else
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g_assert_not_reached ();
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if (value != NULL)
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g_object_ref (value);
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if (table != NULL)
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g_hash_table_unref (table);
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return value;
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}
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static void
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g_menu_model_init (GMenuModel *model)
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{
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}
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static void
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g_menu_model_class_init (GMenuModelClass *class)
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{
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class->iterate_item_attributes = g_menu_model_real_iterate_item_attributes;
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class->get_item_attribute_value = g_menu_model_real_get_item_attribute_value;
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class->iterate_item_links = g_menu_model_real_iterate_item_links;
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class->get_item_link = g_menu_model_real_get_item_link;
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/**
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* GMenuModel::items-changed:
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* @model: the #GMenuModel that is changing
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* @position: the position of the change
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* @removed: the number of items removed
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* @added: the number of items added
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*
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* Emitted when a change has occured to the menu.
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*
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* The only changes that can occur to a menu is that items are removed
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* or added. Items may not change (except by being removed and added
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* back in the same location). This signal is capable of describing
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* both of those changes (at the same time).
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*
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* The signal means that starting at the index @position, @removed
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* items were removed and @added items were added in their place. If
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* @removed is zero then only items were added. If @added is zero
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* then only items were removed.
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*
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* As an example, if the menu contains items a, b, c, d (in that
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* order) and the signal (2, 1, 3) occurs then the new composition of
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* the menu will be a, b, _, _, _, d (with each _ representing some
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* new item).
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*
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* Signal handlers may query the model (particularly the added items)
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* and expect to see the results of the modification that is being
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* reported. The signal is emitted after the modification.
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**/
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g_menu_model_items_changed_signal =
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g_signal_new (I_("items-changed"), G_TYPE_MENU_MODEL,
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G_SIGNAL_RUN_LAST, 0, NULL, NULL,
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_g_cclosure_marshal_VOID__INT_INT_INT,
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G_TYPE_NONE,
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3, G_TYPE_INT, G_TYPE_INT, G_TYPE_INT);
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g_signal_set_va_marshaller (g_menu_model_items_changed_signal,
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G_TYPE_FROM_CLASS (class),
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_g_cclosure_marshal_VOID__INT_INT_INTv);
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}
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/**
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* g_menu_model_is_mutable:
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* @model: a #GMenuModel
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*
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* Queries if @model is mutable.
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*
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* An immutable #GMenuModel will never emit the #GMenuModel::items-changed
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* signal. Consumers of the model may make optimisations accordingly.
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*
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* Returns: %TRUE if the model is mutable (ie: "items-changed" may be
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* emitted).
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*
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* Since: 2.32
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*/
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gboolean
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g_menu_model_is_mutable (GMenuModel *model)
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{
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return G_MENU_MODEL_GET_CLASS (model)
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->is_mutable (model);
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}
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/**
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* g_menu_model_get_n_items:
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* @model: a #GMenuModel
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*
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* Query the number of items in @model.
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*
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* Returns: the number of items
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*
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* Since: 2.32
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*/
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gint
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g_menu_model_get_n_items (GMenuModel *model)
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{
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return G_MENU_MODEL_GET_CLASS (model)
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->get_n_items (model);
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}
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/**
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* g_menu_model_iterate_item_attributes:
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* @model: a #GMenuModel
|
|
* @item_index: the index of the item
|
|
*
|
|
* Creates a #GMenuAttributeIter to iterate over the attributes of
|
|
* the item at position @item_index in @model.
|
|
*
|
|
* You must free the iterator with g_object_unref() when you are done.
|
|
*
|
|
* Returns: (transfer full): a new #GMenuAttributeIter
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
GMenuAttributeIter *
|
|
g_menu_model_iterate_item_attributes (GMenuModel *model,
|
|
gint item_index)
|
|
{
|
|
return G_MENU_MODEL_GET_CLASS (model)
|
|
->iterate_item_attributes (model, item_index);
|
|
}
|
|
|
|
/**
|
|
* g_menu_model_get_item_attribute_value:
|
|
* @model: a #GMenuModel
|
|
* @item_index: the index of the item
|
|
* @attribute: the attribute to query
|
|
* @expected_type: (nullable): the expected type of the attribute, or
|
|
* %NULL
|
|
*
|
|
* Queries the item at position @item_index in @model for the attribute
|
|
* specified by @attribute.
|
|
*
|
|
* If @expected_type is non-%NULL then it specifies the expected type of
|
|
* the attribute. If it is %NULL then any type will be accepted.
|
|
*
|
|
* If the attribute exists and matches @expected_type (or if the
|
|
* expected type is unspecified) then the value is returned.
|
|
*
|
|
* If the attribute does not exist, or does not match the expected type
|
|
* then %NULL is returned.
|
|
*
|
|
* Returns: (transfer full): the value of the attribute
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
GVariant *
|
|
g_menu_model_get_item_attribute_value (GMenuModel *model,
|
|
gint item_index,
|
|
const gchar *attribute,
|
|
const GVariantType *expected_type)
|
|
{
|
|
return G_MENU_MODEL_GET_CLASS (model)
|
|
->get_item_attribute_value (model, item_index, attribute, expected_type);
|
|
}
|
|
|
|
/**
|
|
* g_menu_model_get_item_attribute:
|
|
* @model: a #GMenuModel
|
|
* @item_index: the index of the item
|
|
* @attribute: the attribute to query
|
|
* @format_string: a #GVariant format string
|
|
* @...: positional parameters, as per @format_string
|
|
*
|
|
* Queries item at position @item_index in @model for the attribute
|
|
* specified by @attribute.
|
|
*
|
|
* If the attribute exists and matches the #GVariantType corresponding
|
|
* to @format_string then @format_string is used to deconstruct the
|
|
* value into the positional parameters and %TRUE is returned.
|
|
*
|
|
* If the attribute does not exist, or it does exist but has the wrong
|
|
* type, then the positional parameters are ignored and %FALSE is
|
|
* returned.
|
|
*
|
|
* This function is a mix of g_menu_model_get_item_attribute_value() and
|
|
* g_variant_get(), followed by a g_variant_unref(). As such,
|
|
* @format_string must make a complete copy of the data (since the
|
|
* #GVariant may go away after the call to g_variant_unref()). In
|
|
* particular, no '&' characters are allowed in @format_string.
|
|
*
|
|
* Returns: %TRUE if the named attribute was found with the expected
|
|
* type
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
gboolean
|
|
g_menu_model_get_item_attribute (GMenuModel *model,
|
|
gint item_index,
|
|
const gchar *attribute,
|
|
const gchar *format_string,
|
|
...)
|
|
{
|
|
GVariant *value;
|
|
va_list ap;
|
|
|
|
value = g_menu_model_get_item_attribute_value (model, item_index, attribute, NULL);
|
|
|
|
if (value == NULL)
|
|
return FALSE;
|
|
|
|
if (!g_variant_check_format_string (value, format_string, TRUE))
|
|
{
|
|
g_variant_unref (value);
|
|
return FALSE;
|
|
}
|
|
|
|
va_start (ap, format_string);
|
|
g_variant_get_va (value, format_string, NULL, &ap);
|
|
g_variant_unref (value);
|
|
va_end (ap);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* g_menu_model_iterate_item_links:
|
|
* @model: a #GMenuModel
|
|
* @item_index: the index of the item
|
|
*
|
|
* Creates a #GMenuLinkIter to iterate over the links of the item at
|
|
* position @item_index in @model.
|
|
*
|
|
* You must free the iterator with g_object_unref() when you are done.
|
|
*
|
|
* Returns: (transfer full): a new #GMenuLinkIter
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
GMenuLinkIter *
|
|
g_menu_model_iterate_item_links (GMenuModel *model,
|
|
gint item_index)
|
|
{
|
|
return G_MENU_MODEL_GET_CLASS (model)
|
|
->iterate_item_links (model, item_index);
|
|
}
|
|
|
|
/**
|
|
* g_menu_model_get_item_link:
|
|
* @model: a #GMenuModel
|
|
* @item_index: the index of the item
|
|
* @link: the link to query
|
|
*
|
|
* Queries the item at position @item_index in @model for the link
|
|
* specified by @link.
|
|
*
|
|
* If the link exists, the linked #GMenuModel is returned. If the link
|
|
* does not exist, %NULL is returned.
|
|
*
|
|
* Returns: (transfer full): the linked #GMenuModel, or %NULL
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
GMenuModel *
|
|
g_menu_model_get_item_link (GMenuModel *model,
|
|
gint item_index,
|
|
const gchar *link)
|
|
{
|
|
return G_MENU_MODEL_GET_CLASS (model)
|
|
->get_item_link (model, item_index, link);
|
|
}
|
|
|
|
/**
|
|
* g_menu_model_items_changed:
|
|
* @model: a #GMenuModel
|
|
* @position: the position of the change
|
|
* @removed: the number of items removed
|
|
* @added: the number of items added
|
|
*
|
|
* Requests emission of the #GMenuModel::items-changed signal on @model.
|
|
*
|
|
* This function should never be called except by #GMenuModel
|
|
* subclasses. Any other calls to this function will very likely lead
|
|
* to a violation of the interface of the model.
|
|
*
|
|
* The implementation should update its internal representation of the
|
|
* menu before emitting the signal. The implementation should further
|
|
* expect to receive queries about the new state of the menu (and
|
|
* particularly added menu items) while signal handlers are running.
|
|
*
|
|
* The implementation must dispatch this call directly from a mainloop
|
|
* entry and not in response to calls -- particularly those from the
|
|
* #GMenuModel API. Said another way: the menu must not change while
|
|
* user code is running without returning to the mainloop.
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
void
|
|
g_menu_model_items_changed (GMenuModel *model,
|
|
gint position,
|
|
gint removed,
|
|
gint added)
|
|
{
|
|
g_signal_emit (model, g_menu_model_items_changed_signal, 0, position, removed, added);
|
|
}
|
|
|
|
struct _GMenuAttributeIterPrivate
|
|
{
|
|
GQuark name;
|
|
GVariant *value;
|
|
gboolean valid;
|
|
};
|
|
|
|
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GMenuAttributeIter, g_menu_attribute_iter, G_TYPE_OBJECT)
|
|
|
|
/**
|
|
* g_menu_attribute_iter_get_next:
|
|
* @iter: a #GMenuAttributeIter
|
|
* @out_name: (out) (optional) (transfer none): the type of the attribute
|
|
* @value: (out) (optional) (transfer full): the attribute value
|
|
*
|
|
* This function combines g_menu_attribute_iter_next() with
|
|
* g_menu_attribute_iter_get_name() and g_menu_attribute_iter_get_value().
|
|
*
|
|
* First the iterator is advanced to the next (possibly first) attribute.
|
|
* If that fails, then %FALSE is returned and there are no other
|
|
* effects.
|
|
*
|
|
* If successful, @name and @value are set to the name and value of the
|
|
* attribute that has just been advanced to. At this point,
|
|
* g_menu_attribute_iter_get_name() and g_menu_attribute_iter_get_value() will
|
|
* return the same values again.
|
|
*
|
|
* The value returned in @name remains valid for as long as the iterator
|
|
* remains at the current position. The value returned in @value must
|
|
* be unreffed using g_variant_unref() when it is no longer in use.
|
|
*
|
|
* Returns: %TRUE on success, or %FALSE if there is no additional
|
|
* attribute
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
gboolean
|
|
g_menu_attribute_iter_get_next (GMenuAttributeIter *iter,
|
|
const gchar **out_name,
|
|
GVariant **value)
|
|
{
|
|
const gchar *name;
|
|
|
|
if (iter->priv->value)
|
|
{
|
|
g_variant_unref (iter->priv->value);
|
|
iter->priv->value = NULL;
|
|
}
|
|
|
|
iter->priv->valid = G_MENU_ATTRIBUTE_ITER_GET_CLASS (iter)
|
|
->get_next (iter, &name, &iter->priv->value);
|
|
|
|
if (iter->priv->valid)
|
|
{
|
|
iter->priv->name = g_quark_from_string (name);
|
|
if (out_name)
|
|
*out_name = g_quark_to_string (iter->priv->name);
|
|
|
|
if (value)
|
|
*value = g_variant_ref (iter->priv->value);
|
|
}
|
|
|
|
return iter->priv->valid;
|
|
}
|
|
|
|
/**
|
|
* g_menu_attribute_iter_next:
|
|
* @iter: a #GMenuAttributeIter
|
|
*
|
|
* Attempts to advance the iterator to the next (possibly first)
|
|
* attribute.
|
|
*
|
|
* %TRUE is returned on success, or %FALSE if there are no more
|
|
* attributes.
|
|
*
|
|
* You must call this function when you first acquire the iterator
|
|
* to advance it to the first attribute (and determine if the first
|
|
* attribute exists at all).
|
|
*
|
|
* Returns: %TRUE on success, or %FALSE when there are no more attributes
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
gboolean
|
|
g_menu_attribute_iter_next (GMenuAttributeIter *iter)
|
|
{
|
|
return g_menu_attribute_iter_get_next (iter, NULL, NULL);
|
|
}
|
|
|
|
/**
|
|
* g_menu_attribute_iter_get_name:
|
|
* @iter: a #GMenuAttributeIter
|
|
*
|
|
* Gets the name of the attribute at the current iterator position, as
|
|
* a string.
|
|
*
|
|
* The iterator is not advanced.
|
|
*
|
|
* Returns: the name of the attribute
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
const gchar *
|
|
g_menu_attribute_iter_get_name (GMenuAttributeIter *iter)
|
|
{
|
|
g_return_val_if_fail (iter->priv->valid, 0);
|
|
|
|
return g_quark_to_string (iter->priv->name);
|
|
}
|
|
|
|
/**
|
|
* g_menu_attribute_iter_get_value:
|
|
* @iter: a #GMenuAttributeIter
|
|
*
|
|
* Gets the value of the attribute at the current iterator position.
|
|
*
|
|
* The iterator is not advanced.
|
|
*
|
|
* Returns: (transfer full): the value of the current attribute
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
GVariant *
|
|
g_menu_attribute_iter_get_value (GMenuAttributeIter *iter)
|
|
{
|
|
g_return_val_if_fail (iter->priv->valid, NULL);
|
|
|
|
return g_variant_ref (iter->priv->value);
|
|
}
|
|
|
|
static void
|
|
g_menu_attribute_iter_finalize (GObject *object)
|
|
{
|
|
GMenuAttributeIter *iter = G_MENU_ATTRIBUTE_ITER (object);
|
|
|
|
if (iter->priv->value)
|
|
g_variant_unref (iter->priv->value);
|
|
|
|
G_OBJECT_CLASS (g_menu_attribute_iter_parent_class)
|
|
->finalize (object);
|
|
}
|
|
|
|
static void
|
|
g_menu_attribute_iter_init (GMenuAttributeIter *iter)
|
|
{
|
|
iter->priv = g_menu_attribute_iter_get_instance_private (iter);
|
|
}
|
|
|
|
static void
|
|
g_menu_attribute_iter_class_init (GMenuAttributeIterClass *class)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (class);
|
|
|
|
object_class->finalize = g_menu_attribute_iter_finalize;
|
|
}
|
|
|
|
struct _GMenuLinkIterPrivate
|
|
{
|
|
GQuark name;
|
|
GMenuModel *value;
|
|
gboolean valid;
|
|
};
|
|
|
|
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GMenuLinkIter, g_menu_link_iter, G_TYPE_OBJECT)
|
|
|
|
/**
|
|
* g_menu_link_iter_get_next:
|
|
* @iter: a #GMenuLinkIter
|
|
* @out_link: (out) (optional) (transfer none): the name of the link
|
|
* @value: (out) (optional) (transfer full): the linked #GMenuModel
|
|
*
|
|
* This function combines g_menu_link_iter_next() with
|
|
* g_menu_link_iter_get_name() and g_menu_link_iter_get_value().
|
|
*
|
|
* First the iterator is advanced to the next (possibly first) link.
|
|
* If that fails, then %FALSE is returned and there are no other effects.
|
|
*
|
|
* If successful, @out_link and @value are set to the name and #GMenuModel
|
|
* of the link that has just been advanced to. At this point,
|
|
* g_menu_link_iter_get_name() and g_menu_link_iter_get_value() will return the
|
|
* same values again.
|
|
*
|
|
* The value returned in @out_link remains valid for as long as the iterator
|
|
* remains at the current position. The value returned in @value must
|
|
* be unreffed using g_object_unref() when it is no longer in use.
|
|
*
|
|
* Returns: %TRUE on success, or %FALSE if there is no additional link
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
gboolean
|
|
g_menu_link_iter_get_next (GMenuLinkIter *iter,
|
|
const gchar **out_link,
|
|
GMenuModel **value)
|
|
{
|
|
const gchar *name;
|
|
|
|
if (iter->priv->value)
|
|
{
|
|
g_object_unref (iter->priv->value);
|
|
iter->priv->value = NULL;
|
|
}
|
|
|
|
iter->priv->valid = G_MENU_LINK_ITER_GET_CLASS (iter)
|
|
->get_next (iter, &name, &iter->priv->value);
|
|
|
|
if (iter->priv->valid)
|
|
{
|
|
g_assert (name != NULL);
|
|
|
|
iter->priv->name = g_quark_from_string (name);
|
|
if (out_link)
|
|
*out_link = g_quark_to_string (iter->priv->name);
|
|
|
|
if (value)
|
|
*value = g_object_ref (iter->priv->value);
|
|
}
|
|
|
|
return iter->priv->valid;
|
|
}
|
|
|
|
/**
|
|
* g_menu_link_iter_next:
|
|
* @iter: a #GMenuLinkIter
|
|
*
|
|
* Attempts to advance the iterator to the next (possibly first)
|
|
* link.
|
|
*
|
|
* %TRUE is returned on success, or %FALSE if there are no more links.
|
|
*
|
|
* You must call this function when you first acquire the iterator to
|
|
* advance it to the first link (and determine if the first link exists
|
|
* at all).
|
|
*
|
|
* Returns: %TRUE on success, or %FALSE when there are no more links
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
gboolean
|
|
g_menu_link_iter_next (GMenuLinkIter *iter)
|
|
{
|
|
return g_menu_link_iter_get_next (iter, NULL, NULL);
|
|
}
|
|
|
|
/**
|
|
* g_menu_link_iter_get_name:
|
|
* @iter: a #GMenuLinkIter
|
|
*
|
|
* Gets the name of the link at the current iterator position.
|
|
*
|
|
* The iterator is not advanced.
|
|
*
|
|
* Returns: the type of the link
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
const gchar *
|
|
g_menu_link_iter_get_name (GMenuLinkIter *iter)
|
|
{
|
|
g_return_val_if_fail (iter->priv->valid, 0);
|
|
|
|
return g_quark_to_string (iter->priv->name);
|
|
}
|
|
|
|
/**
|
|
* g_menu_link_iter_get_value:
|
|
* @iter: a #GMenuLinkIter
|
|
*
|
|
* Gets the linked #GMenuModel at the current iterator position.
|
|
*
|
|
* The iterator is not advanced.
|
|
*
|
|
* Returns: (transfer full): the #GMenuModel that is linked to
|
|
*
|
|
* Since: 2.32
|
|
*/
|
|
GMenuModel *
|
|
g_menu_link_iter_get_value (GMenuLinkIter *iter)
|
|
{
|
|
g_return_val_if_fail (iter->priv->valid, NULL);
|
|
|
|
return g_object_ref (iter->priv->value);
|
|
}
|
|
|
|
static void
|
|
g_menu_link_iter_finalize (GObject *object)
|
|
{
|
|
GMenuLinkIter *iter = G_MENU_LINK_ITER (object);
|
|
|
|
if (iter->priv->value)
|
|
g_object_unref (iter->priv->value);
|
|
|
|
G_OBJECT_CLASS (g_menu_link_iter_parent_class)
|
|
->finalize (object);
|
|
}
|
|
|
|
static void
|
|
g_menu_link_iter_init (GMenuLinkIter *iter)
|
|
{
|
|
iter->priv = g_menu_link_iter_get_instance_private (iter);
|
|
}
|
|
|
|
static void
|
|
g_menu_link_iter_class_init (GMenuLinkIterClass *class)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (class);
|
|
|
|
object_class->finalize = g_menu_link_iter_finalize;
|
|
}
|