gtk2/gtk/gtkclipboard.c
Emmanuele Bassi 5880d1b990 gtk: Cast static strings assigned to non-const variables
GtkTargetEntry.target is particularly egregious, and it should really be
constified.
2016-10-17 11:44:10 +01:00

2228 lines
67 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* GTK - The GIMP Toolkit
* Copyright (C) 2000 Red Hat, Inc.
* Copyright (C) 2004 Nokia Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Global clipboard abstraction.
*/
#include "config.h"
#include <string.h>
#include "gtkclipboard.h"
#include "gtkclipboardprivate.h"
#include "gtkinvisible.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtktextbufferrichtext.h"
#include "gtkintl.h"
#ifdef GDK_WINDOWING_X11
#include "x11/gdkx.h"
#endif
#ifdef GDK_WINDOWING_BROADWAY
#include "broadway/gdkbroadway.h"
#endif
#ifdef GDK_WINDOWING_WIN32
#include "win32/gdkwin32.h"
#endif
/**
* SECTION:gtkclipboard
* @Short_description: Storing data on clipboards
* @Title: Clipboards
* @See_also: #GtkSelectionData
*
* The #GtkClipboard object represents a clipboard of data shared
* between different processes or between different widgets in
* the same process. Each clipboard is identified by a name encoded as a
* #GdkAtom. (Conversion to and from strings can be done with
* gdk_atom_intern() and gdk_atom_name().) The default clipboard
* corresponds to the “CLIPBOARD” atom; another commonly used clipboard
* is the “PRIMARY” clipboard, which, in X, traditionally contains
* the currently selected text.
*
* To support having a number of different formats on the clipboard
* at the same time, the clipboard mechanism allows providing
* callbacks instead of the actual data. When you set the contents
* of the clipboard, you can either supply the data directly (via
* functions like gtk_clipboard_set_text()), or you can supply a
* callback to be called at a later time when the data is needed (via
* gtk_clipboard_set_with_data() or gtk_clipboard_set_with_owner().)
* Providing a callback also avoids having to make copies of the data
* when it is not needed.
*
* gtk_clipboard_set_with_data() and gtk_clipboard_set_with_owner()
* are quite similar; the choice between the two depends mostly on
* which is more convenient in a particular situation.
* The former is most useful when you want to have a blob of data
* with callbacks to convert it into the various data types that you
* advertise. When the @clear_func you provided is called, you
* simply free the data blob. The latter is more useful when the
* contents of clipboard reflect the internal state of a #GObject
* (As an example, for the PRIMARY clipboard, when an entry widget
* provides the clipboards contents the contents are simply the
* text within the selected region.) If the contents change, the
* entry widget can call gtk_clipboard_set_with_owner() to update
* the timestamp for clipboard ownership, without having to worry
* about @clear_func being called.
*
* Requesting the data from the clipboard is essentially
* asynchronous. If the contents of the clipboard are provided within
* the same process, then a direct function call will be made to
* retrieve the data, but if they are provided by another process,
* then the data needs to be retrieved from the other process, which
* may take some time. To avoid blocking the user interface, the call
* to request the selection, gtk_clipboard_request_contents() takes a
* callback that will be called when the contents are received (or
* when the request fails.) If you dont want to deal with providing
* a separate callback, you can also use gtk_clipboard_wait_for_contents().
* What this does is run the GLib main loop recursively waiting for
* the contents. This can simplify the code flow, but you still have
* to be aware that other callbacks in your program can be called
* while this recursive mainloop is running.
*
* Along with the functions to get the clipboard contents as an
* arbitrary data chunk, there are also functions to retrieve
* it as text, gtk_clipboard_request_text() and
* gtk_clipboard_wait_for_text(). These functions take care of
* determining which formats are advertised by the clipboard
* provider, asking for the clipboard in the best available format
* and converting the results into the UTF-8 encoding. (The standard
* form for representing strings in GTK+.)
*/
enum {
OWNER_CHANGE,
LAST_SIGNAL
};
typedef struct _RequestContentsInfo RequestContentsInfo;
typedef struct _RequestTextInfo RequestTextInfo;
typedef struct _RequestRichTextInfo RequestRichTextInfo;
typedef struct _RequestImageInfo RequestImageInfo;
typedef struct _RequestURIInfo RequestURIInfo;
typedef struct _RequestTargetsInfo RequestTargetsInfo;
struct _RequestContentsInfo
{
GtkClipboardReceivedFunc callback;
gpointer user_data;
};
struct _RequestTextInfo
{
GtkClipboardTextReceivedFunc callback;
gpointer user_data;
};
struct _RequestRichTextInfo
{
GtkClipboardRichTextReceivedFunc callback;
GdkAtom *atoms;
gint n_atoms;
gint current_atom;
gpointer user_data;
};
struct _RequestImageInfo
{
GtkClipboardImageReceivedFunc callback;
gpointer user_data;
};
struct _RequestURIInfo
{
GtkClipboardURIReceivedFunc callback;
gpointer user_data;
};
struct _RequestTargetsInfo
{
GtkClipboardTargetsReceivedFunc callback;
gpointer user_data;
};
static void gtk_clipboard_finalize (GObject *object);
static void gtk_clipboard_owner_change (GtkClipboard *clipboard,
GdkEventOwnerChange *event);
static gboolean gtk_clipboard_set_contents (GtkClipboard *clipboard,
const GtkTargetEntry *targets,
guint n_targets,
GtkClipboardGetFunc get_func,
GtkClipboardClearFunc clear_func,
gpointer user_data,
gboolean have_owner);
static void gtk_clipboard_real_clear (GtkClipboard *clipboard);
static void gtk_clipboard_real_request_contents (GtkClipboard *clipboard,
GdkAtom target,
GtkClipboardReceivedFunc callback,
gpointer user_data);
static void gtk_clipboard_real_set_can_store (GtkClipboard *clipboard,
const GtkTargetEntry *targets,
gint n_targets);
static void gtk_clipboard_real_store (GtkClipboard *clipboard);
static void clipboard_unset (GtkClipboard *clipboard);
static void selection_received (GtkWidget *widget,
GtkSelectionData *selection_data,
guint time);
static GtkClipboard *clipboard_peek (GdkDisplay *display,
GdkAtom selection,
gboolean only_if_exists);
static GtkWidget * get_clipboard_widget (GdkDisplay *display);
enum {
TARGET_STRING,
TARGET_TEXT,
TARGET_COMPOUND_TEXT,
TARGET_UTF8_STRING,
TARGET_SAVE_TARGETS
};
static const gchar request_contents_key[] = "gtk-request-contents";
static GQuark request_contents_key_id = 0;
static const gchar clipboards_owned_key[] = "gtk-clipboards-owned";
static GQuark clipboards_owned_key_id = 0;
static guint clipboard_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GtkClipboard, gtk_clipboard, G_TYPE_OBJECT)
static void
gtk_clipboard_init (GtkClipboard *object)
{
}
static void
gtk_clipboard_class_init (GtkClipboardClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
gobject_class->finalize = gtk_clipboard_finalize;
class->set_contents = gtk_clipboard_set_contents;
class->clear = gtk_clipboard_real_clear;
class->request_contents = gtk_clipboard_real_request_contents;
class->set_can_store = gtk_clipboard_real_set_can_store;
class->store = gtk_clipboard_real_store;
class->owner_change = gtk_clipboard_owner_change;
/**
* GtkClipboard::owner-change:
* @clipboard: the #GtkClipboard on which the signal is emitted
* @event: (type Gdk.EventOwnerChange): the @GdkEventOwnerChange event
*
* The ::owner-change signal is emitted when GTK+ receives an
* event that indicates that the ownership of the selection
* associated with @clipboard has changed.
*
* Since: 2.6
*/
clipboard_signals[OWNER_CHANGE] =
g_signal_new (I_("owner-change"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkClipboardClass, owner_change),
NULL, NULL,
NULL,
G_TYPE_NONE, 1,
GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
}
static void
gtk_clipboard_finalize (GObject *object)
{
GtkClipboard *clipboard;
GtkWidget *clipboard_widget = NULL;
GSList *clipboards = NULL;
clipboard = GTK_CLIPBOARD (object);
if (clipboard->display)
{
clipboards = g_object_get_data (G_OBJECT (clipboard->display), "gtk-clipboard-list");
if (g_slist_index (clipboards, clipboard) >= 0)
g_warning ("GtkClipboard prematurely finalized");
clipboards = g_slist_remove (clipboards, clipboard);
g_object_set_data (G_OBJECT (clipboard->display), "gtk-clipboard-list",
clipboards);
/* don't use get_clipboard_widget() here because it would create the
* widget if it doesn't exist.
*/
clipboard_widget = g_object_get_data (G_OBJECT (clipboard->display),
"gtk-clipboard-widget");
}
clipboard_unset (clipboard);
if (clipboard->store_loop && g_main_loop_is_running (clipboard->store_loop))
g_main_loop_quit (clipboard->store_loop);
if (clipboard->store_timeout != 0)
g_source_remove (clipboard->store_timeout);
if (clipboard_widget != NULL && clipboard->notify_signal_id != 0)
g_signal_handler_disconnect (clipboard_widget, clipboard->notify_signal_id);
g_free (clipboard->storable_targets);
g_free (clipboard->cached_targets);
G_OBJECT_CLASS (gtk_clipboard_parent_class)->finalize (object);
}
static void
clipboard_display_closed (GdkDisplay *display,
gboolean is_error,
GtkClipboard *clipboard)
{
GSList *clipboards;
clipboards = g_object_get_data (G_OBJECT (display), "gtk-clipboard-list");
g_object_run_dispose (G_OBJECT (clipboard));
clipboards = g_slist_remove (clipboards, clipboard);
g_object_set_data (G_OBJECT (display), I_("gtk-clipboard-list"), clipboards);
g_object_unref (clipboard);
}
/**
* gtk_clipboard_get_for_display:
* @display: the #GdkDisplay for which the clipboard is to be retrieved or created.
* @selection: a #GdkAtom which identifies the clipboard to use.
*
* Returns the clipboard object for the given selection.
* Cut/copy/paste menu items and keyboard shortcuts should use
* the default clipboard, returned by passing %GDK_SELECTION_CLIPBOARD for @selection.
* (%GDK_NONE is supported as a synonym for GDK_SELECTION_CLIPBOARD
* for backwards compatibility reasons.)
* The currently-selected object or text should be provided on the clipboard
* identified by #GDK_SELECTION_PRIMARY. Cut/copy/paste menu items
* conceptually copy the contents of the #GDK_SELECTION_PRIMARY clipboard
* to the default clipboard, i.e. they copy the selection to what the
* user sees as the clipboard.
*
* (Passing #GDK_NONE is the same as using `gdk_atom_intern
* ("CLIPBOARD", FALSE)`.
*
* See the
* [FreeDesktop Clipboard Specification](http://www.freedesktop.org/Standards/clipboards-spec)
* for a detailed discussion of the “CLIPBOARD” vs. “PRIMARY”
* selections under the X window system. On Win32 the
* #GDK_SELECTION_PRIMARY clipboard is essentially ignored.)
*
* Its possible to have arbitrary named clipboards; if you do invent
* new clipboards, you should prefix the selection name with an
* underscore (because the ICCCM requires that nonstandard atoms are
* underscore-prefixed), and namespace it as well. For example,
* if your application called “Foo” has a special-purpose
* clipboard, you might call it “_FOO_SPECIAL_CLIPBOARD”.
*
* Returns: (transfer none): the appropriate clipboard object. If no
* clipboard already exists, a new one will be created. Once a clipboard
* object has been created, it is persistent and, since it is owned by
* GTK+, must not be freed or unrefd.
*
* Since: 2.2
**/
GtkClipboard *
gtk_clipboard_get_for_display (GdkDisplay *display,
GdkAtom selection)
{
g_return_val_if_fail (display != NULL, NULL); /* See bgo#463773; this is needed because Flash Player sucks */
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (!gdk_display_is_closed (display), NULL);
return clipboard_peek (display, selection, FALSE);
}
/**
* gtk_clipboard_get:
* @selection: a #GdkAtom which identifies the clipboard to use
*
* Returns the clipboard object for the given selection.
* See gtk_clipboard_get_for_display() for complete details.
*
* Returns: (transfer none): the appropriate clipboard object. If no clipboard
* already exists, a new one will be created. Once a clipboard
* object has been created, it is persistent and, since it is
* owned by GTK+, must not be freed or unreffed.
*/
GtkClipboard *
gtk_clipboard_get (GdkAtom selection)
{
return gtk_clipboard_get_for_display (gdk_display_get_default (), selection);
}
/**
* gtk_clipboard_get_default:
* @display: the #GdkDisplay for which the clipboard is to be retrieved.
*
* Returns the default clipboard object for use with cut/copy/paste menu items
* and keyboard shortcuts.
*
* Return value: (transfer none): the default clipboard object.
*
* Since: 3.16
**/
GtkClipboard *
gtk_clipboard_get_default (GdkDisplay *display)
{
g_return_val_if_fail (display != NULL, NULL);
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
return gtk_clipboard_get_for_display (display, GDK_SELECTION_CLIPBOARD);
}
static void
selection_get_cb (GtkWidget *widget,
GtkSelectionData *selection_data,
guint info,
guint time)
{
GtkClipboard *clipboard;
clipboard = gtk_widget_get_clipboard (widget,
gtk_selection_data_get_selection (selection_data));
if (clipboard && clipboard->get_func)
clipboard->get_func (clipboard, selection_data, info, clipboard->user_data);
}
static gboolean
selection_clear_event_cb (GtkWidget *widget,
GdkEventSelection *event)
{
GtkClipboard *clipboard = gtk_widget_get_clipboard (widget, event->selection);
if (clipboard)
{
clipboard_unset (clipboard);
return TRUE;
}
return FALSE;
}
static GtkWidget *
make_clipboard_widget (GdkDisplay *display,
gboolean provider)
{
GtkWidget *widget = gtk_invisible_new_for_screen (gdk_display_get_default_screen (display));
g_signal_connect (widget, "selection-received",
G_CALLBACK (selection_received), NULL);
if (provider)
{
/* We need this for gdk_x11_get_server_time() */
gtk_widget_add_events (widget, GDK_PROPERTY_CHANGE_MASK);
g_signal_connect (widget, "selection-get",
G_CALLBACK (selection_get_cb), NULL);
g_signal_connect (widget, "selection-clear-event",
G_CALLBACK (selection_clear_event_cb), NULL);
}
return widget;
}
static GtkWidget *
get_clipboard_widget (GdkDisplay *display)
{
GtkWidget *clip_widget = g_object_get_data (G_OBJECT (display), "gtk-clipboard-widget");
if (!clip_widget)
{
clip_widget = make_clipboard_widget (display, TRUE);
g_object_set_data (G_OBJECT (display), I_("gtk-clipboard-widget"), clip_widget);
}
return clip_widget;
}
/* This function makes a very good guess at what the correct
* timestamp for a selection request should be. If there is
* a currently processed event, it uses the timestamp for that
* event, otherwise it uses the current server time. However,
* if the time resulting from that is older than the time used
* last time, it uses the time used last time instead.
*
* In order implement this correctly, we never use CurrentTime,
* but actually retrieve the actual timestamp from the server.
* This is a little slower but allows us to make the guarantee
* that the times used by this application will always ascend
* and we wont get selections being rejected just because
* we are using a correct timestamp from an event, but used
* CurrentTime previously.
*/
static guint32
clipboard_get_timestamp (GtkClipboard *clipboard)
{
GtkWidget *clipboard_widget = get_clipboard_widget (clipboard->display);
guint32 timestamp = gtk_get_current_event_time ();
GdkWindow *window;
if (timestamp == GDK_CURRENT_TIME)
{
window = gtk_widget_get_window (clipboard_widget);
#ifdef GDK_WINDOWING_X11
if (GDK_IS_X11_WINDOW (window))
{
timestamp = gdk_x11_get_server_time (gtk_widget_get_window (clipboard_widget));
}
else
#endif
#if defined GDK_WINDOWING_WIN32
if (GDK_IS_WIN32_WINDOW (window))
{
timestamp = GetMessageTime ();
}
else
#endif
#if defined GDK_WINDOWING_BROADWAY
if (GDK_IS_BROADWAY_WINDOW (window))
{
timestamp = gdk_broadway_get_last_seen_time (window);
}
else
#endif
{
/* No implementation */
}
}
else
{
if (clipboard->timestamp != GDK_CURRENT_TIME)
{
/* Check to see if clipboard->timestamp is newer than
* timestamp, accounting for wraparound.
*/
guint32 max = timestamp + 0x80000000;
if ((max > timestamp &&
(clipboard->timestamp > timestamp &&
clipboard->timestamp <= max)) ||
(max <= timestamp &&
(clipboard->timestamp > timestamp ||
clipboard->timestamp <= max)))
{
timestamp = clipboard->timestamp;
}
}
}
clipboard->timestamp = timestamp;
return timestamp;
}
static void
clipboard_owner_destroyed (gpointer data)
{
GSList *clipboards = data;
GSList *tmp_list;
tmp_list = clipboards;
while (tmp_list)
{
GtkClipboard *clipboard = tmp_list->data;
clipboard->get_func = NULL;
clipboard->clear_func = NULL;
clipboard->user_data = NULL;
clipboard->have_owner = FALSE;
gtk_clipboard_clear (clipboard);
tmp_list = tmp_list->next;
}
g_slist_free (clipboards);
}
static void
clipboard_add_owner_notify (GtkClipboard *clipboard)
{
if (!clipboards_owned_key_id)
clipboards_owned_key_id = g_quark_from_static_string (clipboards_owned_key);
if (clipboard->have_owner)
g_object_set_qdata_full (clipboard->user_data, clipboards_owned_key_id,
g_slist_prepend (g_object_steal_qdata (clipboard->user_data,
clipboards_owned_key_id),
clipboard),
clipboard_owner_destroyed);
}
static void
clipboard_remove_owner_notify (GtkClipboard *clipboard)
{
if (clipboard->have_owner)
g_object_set_qdata_full (clipboard->user_data, clipboards_owned_key_id,
g_slist_remove (g_object_steal_qdata (clipboard->user_data,
clipboards_owned_key_id),
clipboard),
clipboard_owner_destroyed);
}
static gboolean
gtk_clipboard_set_contents (GtkClipboard *clipboard,
const GtkTargetEntry *targets,
guint n_targets,
GtkClipboardGetFunc get_func,
GtkClipboardClearFunc clear_func,
gpointer user_data,
gboolean have_owner)
{
GtkWidget *clipboard_widget = get_clipboard_widget (clipboard->display);
if (gtk_selection_owner_set_for_display (clipboard->display,
clipboard_widget,
clipboard->selection,
clipboard_get_timestamp (clipboard)))
{
clipboard->have_selection = TRUE;
if (clipboard->n_cached_targets != -1)
{
g_free (clipboard->cached_targets);
clipboard->cached_targets = NULL;
clipboard->n_cached_targets = -1;
}
if (!(clipboard->have_owner && have_owner) ||
clipboard->user_data != user_data)
{
clipboard_unset (clipboard);
clipboard->user_data = user_data;
clipboard->have_owner = have_owner;
if (have_owner)
clipboard_add_owner_notify (clipboard);
}
clipboard->get_func = get_func;
clipboard->clear_func = clear_func;
gtk_selection_clear_targets (clipboard_widget, clipboard->selection);
gtk_selection_add_targets (clipboard_widget, clipboard->selection,
targets, n_targets);
return TRUE;
}
else
return FALSE;
}
/**
* gtk_clipboard_set_with_data: (skip)
* @clipboard: a #GtkClipboard
* @targets: (array length=n_targets): array containing information
* about the available forms for the clipboard data
* @n_targets: number of elements in @targets
* @get_func: (scope async): function to call to get the actual clipboard data
* @clear_func: (scope async): when the clipboard contents are set again,
* this function will be called, and @get_func will not be subsequently
* called.
* @user_data: user data to pass to @get_func and @clear_func.
*
* Virtually sets the contents of the specified clipboard by providing
* a list of supported formats for the clipboard data and a function
* to call to get the actual data when it is requested.
*
* Returns: %TRUE if setting the clipboard data succeeded.
* If setting the clipboard data failed the provided callback
* functions will be ignored.
**/
gboolean
gtk_clipboard_set_with_data (GtkClipboard *clipboard,
const GtkTargetEntry *targets,
guint n_targets,
GtkClipboardGetFunc get_func,
GtkClipboardClearFunc clear_func,
gpointer user_data)
{
g_return_val_if_fail (clipboard != NULL, FALSE);
g_return_val_if_fail (targets != NULL, FALSE);
g_return_val_if_fail (get_func != NULL, FALSE);
return GTK_CLIPBOARD_GET_CLASS (clipboard)->set_contents (clipboard,
targets,
n_targets,
get_func,
clear_func,
user_data,
FALSE);
}
/**
* gtk_clipboard_set_with_owner: (skip)
* @clipboard: a #GtkClipboard
* @targets: (array length=n_targets): array containing information
* about the available forms for the clipboard data
* @n_targets: number of elements in @targets
* @get_func: (scope async): function to call to get the actual clipboard data
* @clear_func: (scope async): when the clipboard contents are set again,
* this function will be called, and @get_func will not be subsequently
* called
* @owner: an object that “owns” the data. This object will be passed
* to the callbacks when called
*
* Virtually sets the contents of the specified clipboard by providing
* a list of supported formats for the clipboard data and a function
* to call to get the actual data when it is requested.
*
* The difference between this function and gtk_clipboard_set_with_data()
* is that instead of an generic @user_data pointer, a #GObject is passed
* in.
*
* Returns: %TRUE if setting the clipboard data succeeded.
* If setting the clipboard data failed the provided callback
* functions will be ignored.
**/
gboolean
gtk_clipboard_set_with_owner (GtkClipboard *clipboard,
const GtkTargetEntry *targets,
guint n_targets,
GtkClipboardGetFunc get_func,
GtkClipboardClearFunc clear_func,
GObject *owner)
{
g_return_val_if_fail (clipboard != NULL, FALSE);
g_return_val_if_fail (targets != NULL, FALSE);
g_return_val_if_fail (get_func != NULL, FALSE);
g_return_val_if_fail (G_IS_OBJECT (owner), FALSE);
return GTK_CLIPBOARD_GET_CLASS (clipboard)->set_contents (clipboard,
targets,
n_targets,
get_func,
clear_func,
owner,
TRUE);
}
/**
* gtk_clipboard_get_owner:
* @clipboard: a #GtkClipboard
*
* If the clipboard contents callbacks were set with
* gtk_clipboard_set_with_owner(), and the gtk_clipboard_set_with_data() or
* gtk_clipboard_clear() has not subsequently called, returns the owner set
* by gtk_clipboard_set_with_owner().
*
* Returns: (nullable) (transfer none): the owner of the clipboard, if any;
* otherwise %NULL.
**/
GObject *
gtk_clipboard_get_owner (GtkClipboard *clipboard)
{
g_return_val_if_fail (clipboard != NULL, NULL);
if (clipboard->have_owner)
return clipboard->user_data;
else
return NULL;
}
static void
clipboard_unset (GtkClipboard *clipboard)
{
GtkClipboardClearFunc old_clear_func;
gpointer old_data;
gboolean old_have_owner;
gint old_n_storable_targets;
old_clear_func = clipboard->clear_func;
old_data = clipboard->user_data;
old_have_owner = clipboard->have_owner;
old_n_storable_targets = clipboard->n_storable_targets;
if (old_have_owner)
{
clipboard_remove_owner_notify (clipboard);
clipboard->have_owner = FALSE;
}
clipboard->n_storable_targets = -1;
g_free (clipboard->storable_targets);
clipboard->storable_targets = NULL;
clipboard->get_func = NULL;
clipboard->clear_func = NULL;
clipboard->user_data = NULL;
if (old_clear_func)
old_clear_func (clipboard, old_data);
/* If we've transferred the clipboard data to the manager,
* unref the owner
*/
if (old_have_owner &&
old_n_storable_targets != -1)
g_object_unref (old_data);
}
/**
* gtk_clipboard_clear:
* @clipboard: a #GtkClipboard
*
* Clears the contents of the clipboard. Generally this should only
* be called between the time you call gtk_clipboard_set_with_owner()
* or gtk_clipboard_set_with_data(),
* and when the @clear_func you supplied is called. Otherwise, the
* clipboard may be owned by someone else.
**/
void
gtk_clipboard_clear (GtkClipboard *clipboard)
{
g_return_if_fail (clipboard != NULL);
GTK_CLIPBOARD_GET_CLASS (clipboard)->clear (clipboard);
}
static void
gtk_clipboard_real_clear (GtkClipboard *clipboard)
{
if (clipboard->have_selection)
gtk_selection_owner_set_for_display (clipboard->display,
NULL,
clipboard->selection,
clipboard_get_timestamp (clipboard));
}
static void
text_get_func (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
guint info,
gpointer data)
{
gtk_selection_data_set_text (selection_data, data, -1);
}
static void
text_clear_func (GtkClipboard *clipboard,
gpointer data)
{
g_free (data);
}
/**
* gtk_clipboard_set_text:
* @clipboard: a #GtkClipboard object
* @text: a UTF-8 string.
* @len: length of @text, in bytes, or -1, in which case
* the length will be determined with strlen().
*
* Sets the contents of the clipboard to the given UTF-8 string. GTK+ will
* make a copy of the text and take responsibility for responding
* for requests for the text, and for converting the text into
* the requested format.
**/
void
gtk_clipboard_set_text (GtkClipboard *clipboard,
const gchar *text,
gint len)
{
GtkTargetList *list;
GtkTargetEntry *targets;
gint n_targets;
g_return_if_fail (clipboard != NULL);
g_return_if_fail (text != NULL);
list = gtk_target_list_new (NULL, 0);
gtk_target_list_add_text_targets (list, 0);
targets = gtk_target_table_new_from_list (list, &n_targets);
if (len < 0)
len = strlen (text);
gtk_clipboard_set_with_data (clipboard,
targets, n_targets,
text_get_func, text_clear_func,
g_strndup (text, len));
gtk_clipboard_set_can_store (clipboard, NULL, 0);
gtk_target_table_free (targets, n_targets);
gtk_target_list_unref (list);
}
static void
pixbuf_get_func (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
guint info,
gpointer data)
{
gtk_selection_data_set_pixbuf (selection_data, data);
}
static void
pixbuf_clear_func (GtkClipboard *clipboard,
gpointer data)
{
g_object_unref (data);
}
/**
* gtk_clipboard_set_image:
* @clipboard: a #GtkClipboard object
* @pixbuf: a #GdkPixbuf
*
* Sets the contents of the clipboard to the given #GdkPixbuf.
* GTK+ will take responsibility for responding for requests
* for the image, and for converting the image into the
* requested format.
*
* Since: 2.6
**/
void
gtk_clipboard_set_image (GtkClipboard *clipboard,
GdkPixbuf *pixbuf)
{
GtkTargetList *list;
GtkTargetEntry *targets;
gint n_targets;
g_return_if_fail (clipboard != NULL);
g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
list = gtk_target_list_new (NULL, 0);
gtk_target_list_add_image_targets (list, 0, TRUE);
targets = gtk_target_table_new_from_list (list, &n_targets);
gtk_clipboard_set_with_data (clipboard,
targets, n_targets,
pixbuf_get_func, pixbuf_clear_func,
g_object_ref (pixbuf));
gtk_clipboard_set_can_store (clipboard, NULL, 0);
gtk_target_table_free (targets, n_targets);
gtk_target_list_unref (list);
}
static void
set_request_contents_info (GtkWidget *widget,
RequestContentsInfo *info)
{
if (!request_contents_key_id)
request_contents_key_id = g_quark_from_static_string (request_contents_key);
g_object_set_qdata (G_OBJECT (widget), request_contents_key_id, info);
}
static RequestContentsInfo *
get_request_contents_info (GtkWidget *widget)
{
if (!request_contents_key_id)
return NULL;
else
return g_object_get_qdata (G_OBJECT (widget), request_contents_key_id);
}
static void
selection_received (GtkWidget *widget,
GtkSelectionData *selection_data,
guint time)
{
RequestContentsInfo *request_info = get_request_contents_info (widget);
set_request_contents_info (widget, NULL);
request_info->callback (gtk_widget_get_clipboard (widget, gtk_selection_data_get_selection (selection_data)),
selection_data,
request_info->user_data);
g_free (request_info);
if (widget != get_clipboard_widget (gtk_widget_get_display (widget)))
gtk_widget_destroy (widget);
}
/**
* gtk_clipboard_request_contents:
* @clipboard: a #GtkClipboard
* @target: an atom representing the form into which the clipboard
* owner should convert the selection.
* @callback: (scope async): A function to call when the results are received
* (or the retrieval fails). If the retrieval fails the length field of
* @selection_data will be negative.
* @user_data: user data to pass to @callback
*
* Requests the contents of clipboard as the given target.
* When the results of the result are later received the supplied callback
* will be called.
**/
void
gtk_clipboard_request_contents (GtkClipboard *clipboard,
GdkAtom target,
GtkClipboardReceivedFunc callback,
gpointer user_data)
{
g_return_if_fail (clipboard != NULL);
g_return_if_fail (target != GDK_NONE);
g_return_if_fail (callback != NULL);
GTK_CLIPBOARD_GET_CLASS (clipboard)->request_contents (clipboard,
target,
callback,
user_data);
}
static void
gtk_clipboard_real_request_contents (GtkClipboard *clipboard,
GdkAtom target,
GtkClipboardReceivedFunc callback,
gpointer user_data)
{
RequestContentsInfo *info;
GtkWidget *widget;
GtkWidget *clipboard_widget;
clipboard_widget = get_clipboard_widget (clipboard->display);
if (get_request_contents_info (clipboard_widget))
widget = make_clipboard_widget (clipboard->display, FALSE);
else
widget = clipboard_widget;
info = g_new (RequestContentsInfo, 1);
info->callback = callback;
info->user_data = user_data;
set_request_contents_info (widget, info);
gtk_selection_convert (widget, clipboard->selection, target,
clipboard_get_timestamp (clipboard));
}
static void
request_text_received_func (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
gpointer data)
{
RequestTextInfo *info = data;
gchar *result = NULL;
result = (gchar *) gtk_selection_data_get_text (selection_data);
if (!result)
{
/* If we asked for UTF8 and didn't get it, try compound_text;
* if we asked for compound_text and didn't get it, try string;
* If we asked for anything else and didn't get it, give up.
*/
GdkAtom target = gtk_selection_data_get_target (selection_data);
if (target == gdk_atom_intern_static_string ("UTF8_STRING"))
{
gtk_clipboard_request_contents (clipboard,
gdk_atom_intern_static_string ("COMPOUND_TEXT"),
request_text_received_func, info);
return;
}
else if (target == gdk_atom_intern_static_string ("COMPOUND_TEXT"))
{
gtk_clipboard_request_contents (clipboard,
GDK_TARGET_STRING,
request_text_received_func, info);
return;
}
}
info->callback (clipboard, result, info->user_data);
g_free (info);
g_free (result);
}
/**
* gtk_clipboard_request_text:
* @clipboard: a #GtkClipboard
* @callback: (scope async): a function to call when the text is received,
* or the retrieval fails. (It will always be called one way or the other.)
* @user_data: user data to pass to @callback.
*
* Requests the contents of the clipboard as text. When the text is
* later received, it will be converted to UTF-8 if necessary, and
* @callback will be called.
*
* The @text parameter to @callback will contain the resulting text if
* the request succeeded, or %NULL if it failed. This could happen for
* various reasons, in particular if the clipboard was empty or if the
* contents of the clipboard could not be converted into text form.
**/
void
gtk_clipboard_request_text (GtkClipboard *clipboard,
GtkClipboardTextReceivedFunc callback,
gpointer user_data)
{
RequestTextInfo *info;
g_return_if_fail (clipboard != NULL);
g_return_if_fail (callback != NULL);
info = g_new (RequestTextInfo, 1);
info->callback = callback;
info->user_data = user_data;
gtk_clipboard_request_contents (clipboard, gdk_atom_intern_static_string ("UTF8_STRING"),
request_text_received_func,
info);
}
static void
request_rich_text_received_func (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
gpointer data)
{
RequestRichTextInfo *info = data;
guint8 *result = NULL;
gsize length = 0;
result = (guint8 *) gtk_selection_data_get_data (selection_data);
length = gtk_selection_data_get_length (selection_data);
info->current_atom++;
if ((!result || length < 1) && (info->current_atom < info->n_atoms))
{
gtk_clipboard_request_contents (clipboard, info->atoms[info->current_atom],
request_rich_text_received_func,
info);
return;
}
info->callback (clipboard, gtk_selection_data_get_target (selection_data),
result, length,
info->user_data);
g_free (info->atoms);
g_free (info);
}
/**
* gtk_clipboard_request_rich_text:
* @clipboard: a #GtkClipboard
* @buffer: a #GtkTextBuffer
* @callback: (scope async): a function to call when the text is received,
* or the retrieval fails. (It will always be called one way or the other.)
* @user_data: user data to pass to @callback.
*
* Requests the contents of the clipboard as rich text. When the rich
* text is later received, @callback will be called.
*
* The @text parameter to @callback will contain the resulting rich
* text if the request succeeded, or %NULL if it failed. The @length
* parameter will contain @texts length. This function can fail for
* various reasons, in particular if the clipboard was empty or if the
* contents of the clipboard could not be converted into rich text form.
*
* Since: 2.10
**/
void
gtk_clipboard_request_rich_text (GtkClipboard *clipboard,
GtkTextBuffer *buffer,
GtkClipboardRichTextReceivedFunc callback,
gpointer user_data)
{
RequestRichTextInfo *info;
g_return_if_fail (clipboard != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (callback != NULL);
info = g_new (RequestRichTextInfo, 1);
info->callback = callback;
info->atoms = NULL;
info->n_atoms = 0;
info->current_atom = 0;
info->user_data = user_data;
info->atoms = gtk_text_buffer_get_deserialize_formats (buffer, &info->n_atoms);
gtk_clipboard_request_contents (clipboard, info->atoms[info->current_atom],
request_rich_text_received_func,
info);
}
static void
request_image_received_func (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
gpointer data)
{
RequestImageInfo *info = data;
GdkPixbuf *result = NULL;
result = gtk_selection_data_get_pixbuf (selection_data);
if (!result)
{
/* If we asked for image/png and didn't get it, try image/jpeg;
* if we asked for image/jpeg and didn't get it, try image/gif;
* if we asked for image/gif and didn't get it, try image/bmp;
* If we asked for anything else and didn't get it, give up.
*/
GdkAtom target = gtk_selection_data_get_target (selection_data);
if (target == gdk_atom_intern_static_string ("image/png"))
{
gtk_clipboard_request_contents (clipboard,
gdk_atom_intern_static_string ("image/jpeg"),
request_image_received_func, info);
return;
}
else if (target == gdk_atom_intern_static_string ("image/jpeg"))
{
gtk_clipboard_request_contents (clipboard,
gdk_atom_intern_static_string ("image/gif"),
request_image_received_func, info);
return;
}
else if (target == gdk_atom_intern_static_string ("image/gif"))
{
gtk_clipboard_request_contents (clipboard,
gdk_atom_intern_static_string ("image/bmp"),
request_image_received_func, info);
return;
}
}
info->callback (clipboard, result, info->user_data);
g_free (info);
if (result)
g_object_unref (result);
}
/**
* gtk_clipboard_request_image:
* @clipboard: a #GtkClipboard
* @callback: (scope async): a function to call when the image is received,
* or the retrieval fails. (It will always be called one way or the other.)
* @user_data: user data to pass to @callback.
*
* Requests the contents of the clipboard as image. When the image is
* later received, it will be converted to a #GdkPixbuf, and
* @callback will be called.
*
* The @pixbuf parameter to @callback will contain the resulting
* #GdkPixbuf if the request succeeded, or %NULL if it failed. This
* could happen for various reasons, in particular if the clipboard
* was empty or if the contents of the clipboard could not be
* converted into an image.
*
* Since: 2.6
**/
void
gtk_clipboard_request_image (GtkClipboard *clipboard,
GtkClipboardImageReceivedFunc callback,
gpointer user_data)
{
RequestImageInfo *info;
g_return_if_fail (clipboard != NULL);
g_return_if_fail (callback != NULL);
info = g_new (RequestImageInfo, 1);
info->callback = callback;
info->user_data = user_data;
gtk_clipboard_request_contents (clipboard,
gdk_atom_intern_static_string ("image/png"),
request_image_received_func,
info);
}
static void
request_uris_received_func (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
gpointer data)
{
RequestURIInfo *info = data;
gchar **uris;
uris = gtk_selection_data_get_uris (selection_data);
info->callback (clipboard, uris, info->user_data);
g_strfreev (uris);
g_slice_free (RequestURIInfo, info);
}
/**
* gtk_clipboard_request_uris:
* @clipboard: a #GtkClipboard
* @callback: (scope async): a function to call when the URIs are received,
* or the retrieval fails. (It will always be called one way or the other.)
* @user_data: user data to pass to @callback.
*
* Requests the contents of the clipboard as URIs. When the URIs are
* later received @callback will be called.
*
* The @uris parameter to @callback will contain the resulting array of
* URIs if the request succeeded, or %NULL if it failed. This could happen
* for various reasons, in particular if the clipboard was empty or if the
* contents of the clipboard could not be converted into URI form.
*
* Since: 2.14
**/
void
gtk_clipboard_request_uris (GtkClipboard *clipboard,
GtkClipboardURIReceivedFunc callback,
gpointer user_data)
{
RequestURIInfo *info;
g_return_if_fail (clipboard != NULL);
g_return_if_fail (callback != NULL);
info = g_slice_new (RequestURIInfo);
info->callback = callback;
info->user_data = user_data;
gtk_clipboard_request_contents (clipboard, gdk_atom_intern_static_string ("text/uri-list"),
request_uris_received_func,
info);
}
static void
request_targets_received_func (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
gpointer data)
{
RequestTargetsInfo *info = data;
GdkAtom *targets = NULL;
gint n_targets = 0;
gtk_selection_data_get_targets (selection_data, &targets, &n_targets);
info->callback (clipboard, targets, n_targets, info->user_data);
g_free (info);
g_free (targets);
}
/**
* gtk_clipboard_request_targets:
* @clipboard: a #GtkClipboard
* @callback: (scope async): a function to call when the targets are
* received, or the retrieval fails. (It will always be called
* one way or the other.)
* @user_data: user data to pass to @callback.
*
* Requests the contents of the clipboard as list of supported targets.
* When the list is later received, @callback will be called.
*
* The @targets parameter to @callback will contain the resulting targets if
* the request succeeded, or %NULL if it failed.
*
* Since: 2.4
**/
void
gtk_clipboard_request_targets (GtkClipboard *clipboard,
GtkClipboardTargetsReceivedFunc callback,
gpointer user_data)
{
RequestTargetsInfo *info;
g_return_if_fail (clipboard != NULL);
g_return_if_fail (callback != NULL);
/* If the display supports change notification we cache targets */
if (gdk_display_supports_selection_notification (gtk_clipboard_get_display (clipboard)) &&
clipboard->n_cached_targets != -1)
{
(* callback) (clipboard, clipboard->cached_targets, clipboard->n_cached_targets, user_data);
return;
}
info = g_new (RequestTargetsInfo, 1);
info->callback = callback;
info->user_data = user_data;
gtk_clipboard_request_contents (clipboard, gdk_atom_intern_static_string ("TARGETS"),
request_targets_received_func,
info);
}
typedef struct
{
GMainLoop *loop;
gpointer data;
GdkAtom format; /* used by rich text */
gsize length; /* used by rich text */
} WaitResults;
static void
clipboard_received_func (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
gpointer data)
{
WaitResults *results = data;
if (gtk_selection_data_get_length (selection_data) >= 0)
results->data = gtk_selection_data_copy (selection_data);
g_main_loop_quit (results->loop);
}
/**
* gtk_clipboard_wait_for_contents:
* @clipboard: a #GtkClipboard
* @target: an atom representing the form into which the clipboard
* owner should convert the selection.
*
* Requests the contents of the clipboard using the given target.
* This function waits for the data to be received using the main
* loop, so events, timeouts, etc, may be dispatched during the wait.
*
* Returns: (nullable): a newly-allocated #GtkSelectionData object or %NULL
* if retrieving the given target failed. If non-%NULL,
* this value must be freed with gtk_selection_data_free()
* when you are finished with it.
**/
GtkSelectionData *
gtk_clipboard_wait_for_contents (GtkClipboard *clipboard,
GdkAtom target)
{
WaitResults results;
g_return_val_if_fail (clipboard != NULL, NULL);
g_return_val_if_fail (target != GDK_NONE, NULL);
results.data = NULL;
results.loop = g_main_loop_new (NULL, TRUE);
gtk_clipboard_request_contents (clipboard, target,
clipboard_received_func,
&results);
if (g_main_loop_is_running (results.loop))
{
gdk_threads_leave ();
g_main_loop_run (results.loop);
gdk_threads_enter ();
}
g_main_loop_unref (results.loop);
return results.data;
}
static void
clipboard_text_received_func (GtkClipboard *clipboard,
const gchar *text,
gpointer data)
{
WaitResults *results = data;
results->data = g_strdup (text);
g_main_loop_quit (results->loop);
}
/**
* gtk_clipboard_wait_for_text:
* @clipboard: a #GtkClipboard
*
* Requests the contents of the clipboard as text and converts
* the result to UTF-8 if necessary. This function waits for
* the data to be received using the main loop, so events,
* timeouts, etc, may be dispatched during the wait.
*
* Returns: (nullable): a newly-allocated UTF-8 string which must
* be freed with g_free(), or %NULL if retrieving
* the selection data failed. (This could happen
* for various reasons, in particular if the
* clipboard was empty or if the contents of the
* clipboard could not be converted into text form.)
**/
gchar *
gtk_clipboard_wait_for_text (GtkClipboard *clipboard)
{
WaitResults results;
g_return_val_if_fail (clipboard != NULL, NULL);
results.data = NULL;
results.loop = g_main_loop_new (NULL, TRUE);
gtk_clipboard_request_text (clipboard,
clipboard_text_received_func,
&results);
if (g_main_loop_is_running (results.loop))
{
gdk_threads_leave ();
g_main_loop_run (results.loop);
gdk_threads_enter ();
}
g_main_loop_unref (results.loop);
return results.data;
}
static void
clipboard_rich_text_received_func (GtkClipboard *clipboard,
GdkAtom format,
const guint8 *text,
gsize length,
gpointer data)
{
WaitResults *results = data;
results->data = g_memdup (text, length);
results->format = format;
results->length = length;
g_main_loop_quit (results->loop);
}
/**
* gtk_clipboard_wait_for_rich_text:
* @clipboard: a #GtkClipboard
* @buffer: a #GtkTextBuffer
* @format: (out): return location for the format of the returned data
* @length: (out): return location for the length of the returned data
*
* Requests the contents of the clipboard as rich text. This function
* waits for the data to be received using the main loop, so events,
* timeouts, etc, may be dispatched during the wait.
*
* Returns: (nullable) (array length=length) (transfer full): a
* newly-allocated binary block of data which must be
* freed with g_free(), or %NULL if retrieving the
* selection data failed. (This could happen for various
* reasons, in particular if the clipboard was empty or
* if the contents of the clipboard could not be
* converted into text form.)
*
* Since: 2.10
**/
guint8 *
gtk_clipboard_wait_for_rich_text (GtkClipboard *clipboard,
GtkTextBuffer *buffer,
GdkAtom *format,
gsize *length)
{
WaitResults results;
g_return_val_if_fail (clipboard != NULL, NULL);
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
g_return_val_if_fail (format != NULL, NULL);
g_return_val_if_fail (length != NULL, NULL);
results.data = NULL;
results.loop = g_main_loop_new (NULL, TRUE);
gtk_clipboard_request_rich_text (clipboard, buffer,
clipboard_rich_text_received_func,
&results);
if (g_main_loop_is_running (results.loop))
{
gdk_threads_leave ();
g_main_loop_run (results.loop);
gdk_threads_enter ();
}
g_main_loop_unref (results.loop);
*format = results.format;
*length = results.length;
return results.data;
}
static void
clipboard_image_received_func (GtkClipboard *clipboard,
GdkPixbuf *pixbuf,
gpointer data)
{
WaitResults *results = data;
if (pixbuf)
results->data = g_object_ref (pixbuf);
g_main_loop_quit (results->loop);
}
/**
* gtk_clipboard_wait_for_image:
* @clipboard: a #GtkClipboard
*
* Requests the contents of the clipboard as image and converts
* the result to a #GdkPixbuf. This function waits for
* the data to be received using the main loop, so events,
* timeouts, etc, may be dispatched during the wait.
*
* Returns: (nullable) (transfer full): a newly-allocated #GdkPixbuf
* object which must be disposed with g_object_unref(), or
* %NULL if retrieving the selection data failed. (This could
* happen for various reasons, in particular if the clipboard
* was empty or if the contents of the clipboard could not be
* converted into an image.)
*
* Since: 2.6
**/
GdkPixbuf *
gtk_clipboard_wait_for_image (GtkClipboard *clipboard)
{
WaitResults results;
g_return_val_if_fail (clipboard != NULL, NULL);
results.data = NULL;
results.loop = g_main_loop_new (NULL, TRUE);
gtk_clipboard_request_image (clipboard,
clipboard_image_received_func,
&results);
if (g_main_loop_is_running (results.loop))
{
gdk_threads_leave ();
g_main_loop_run (results.loop);
gdk_threads_enter ();
}
g_main_loop_unref (results.loop);
return results.data;
}
static void
clipboard_uris_received_func (GtkClipboard *clipboard,
gchar **uris,
gpointer data)
{
WaitResults *results = data;
results->data = g_strdupv (uris);
g_main_loop_quit (results->loop);
}
/**
* gtk_clipboard_wait_for_uris:
* @clipboard: a #GtkClipboard
*
* Requests the contents of the clipboard as URIs. This function waits
* for the data to be received using the main loop, so events,
* timeouts, etc, may be dispatched during the wait.
*
* Returns: (nullable) (array zero-terminated=1) (element-type utf8) (transfer full):
* a newly-allocated %NULL-terminated array of strings which must
* be freed with g_strfreev(), or %NULL if retrieving the
* selection data failed. (This could happen for various reasons,
* in particular if the clipboard was empty or if the contents of
* the clipboard could not be converted into URI form.)
*
* Since: 2.14
**/
gchar **
gtk_clipboard_wait_for_uris (GtkClipboard *clipboard)
{
WaitResults results;
g_return_val_if_fail (clipboard != NULL, NULL);
results.data = NULL;
results.loop = g_main_loop_new (NULL, TRUE);
gtk_clipboard_request_uris (clipboard,
clipboard_uris_received_func,
&results);
if (g_main_loop_is_running (results.loop))
{
gdk_threads_leave ();
g_main_loop_run (results.loop);
gdk_threads_enter ();
}
g_main_loop_unref (results.loop);
return results.data;
}
/**
* gtk_clipboard_get_display:
* @clipboard: a #GtkClipboard
*
* Gets the #GdkDisplay associated with @clipboard
*
* Returns: (transfer none): the #GdkDisplay associated with @clipboard
*
* Since: 2.2
**/
GdkDisplay *
gtk_clipboard_get_display (GtkClipboard *clipboard)
{
g_return_val_if_fail (clipboard != NULL, NULL);
return clipboard->display;
}
/**
* gtk_clipboard_wait_is_text_available:
* @clipboard: a #GtkClipboard
*
* Test to see if there is text available to be pasted
* This is done by requesting the TARGETS atom and checking
* if it contains any of the supported text targets. This function
* waits for the data to be received using the main loop, so events,
* timeouts, etc, may be dispatched during the wait.
*
* This function is a little faster than calling
* gtk_clipboard_wait_for_text() since it doesnt need to retrieve
* the actual text.
*
* Returns: %TRUE is there is text available, %FALSE otherwise.
**/
gboolean
gtk_clipboard_wait_is_text_available (GtkClipboard *clipboard)
{
GtkSelectionData *data;
gboolean result = FALSE;
data = gtk_clipboard_wait_for_contents (clipboard, gdk_atom_intern_static_string ("TARGETS"));
if (data)
{
result = gtk_selection_data_targets_include_text (data);
gtk_selection_data_free (data);
}
return result;
}
/**
* gtk_clipboard_wait_is_rich_text_available:
* @clipboard: a #GtkClipboard
* @buffer: a #GtkTextBuffer
*
* Test to see if there is rich text available to be pasted
* This is done by requesting the TARGETS atom and checking
* if it contains any of the supported rich text targets. This function
* waits for the data to be received using the main loop, so events,
* timeouts, etc, may be dispatched during the wait.
*
* This function is a little faster than calling
* gtk_clipboard_wait_for_rich_text() since it doesnt need to retrieve
* the actual text.
*
* Returns: %TRUE is there is rich text available, %FALSE otherwise.
*
* Since: 2.10
**/
gboolean
gtk_clipboard_wait_is_rich_text_available (GtkClipboard *clipboard,
GtkTextBuffer *buffer)
{
GtkSelectionData *data;
gboolean result = FALSE;
g_return_val_if_fail (GTK_IS_CLIPBOARD (clipboard), FALSE);
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
data = gtk_clipboard_wait_for_contents (clipboard, gdk_atom_intern_static_string ("TARGETS"));
if (data)
{
result = gtk_selection_data_targets_include_rich_text (data, buffer);
gtk_selection_data_free (data);
}
return result;
}
/**
* gtk_clipboard_wait_is_image_available:
* @clipboard: a #GtkClipboard
*
* Test to see if there is an image available to be pasted
* This is done by requesting the TARGETS atom and checking
* if it contains any of the supported image targets. This function
* waits for the data to be received using the main loop, so events,
* timeouts, etc, may be dispatched during the wait.
*
* This function is a little faster than calling
* gtk_clipboard_wait_for_image() since it doesnt need to retrieve
* the actual image data.
*
* Returns: %TRUE is there is an image available, %FALSE otherwise.
*
* Since: 2.6
**/
gboolean
gtk_clipboard_wait_is_image_available (GtkClipboard *clipboard)
{
GtkSelectionData *data;
gboolean result = FALSE;
data = gtk_clipboard_wait_for_contents (clipboard,
gdk_atom_intern_static_string ("TARGETS"));
if (data)
{
result = gtk_selection_data_targets_include_image (data, FALSE);
gtk_selection_data_free (data);
}
return result;
}
/**
* gtk_clipboard_wait_is_uris_available:
* @clipboard: a #GtkClipboard
*
* Test to see if there is a list of URIs available to be pasted
* This is done by requesting the TARGETS atom and checking
* if it contains the URI targets. This function
* waits for the data to be received using the main loop, so events,
* timeouts, etc, may be dispatched during the wait.
*
* This function is a little faster than calling
* gtk_clipboard_wait_for_uris() since it doesnt need to retrieve
* the actual URI data.
*
* Returns: %TRUE is there is an URI list available, %FALSE otherwise.
*
* Since: 2.14
**/
gboolean
gtk_clipboard_wait_is_uris_available (GtkClipboard *clipboard)
{
GtkSelectionData *data;
gboolean result = FALSE;
data = gtk_clipboard_wait_for_contents (clipboard,
gdk_atom_intern_static_string ("TARGETS"));
if (data)
{
result = gtk_selection_data_targets_include_uri (data);
gtk_selection_data_free (data);
}
return result;
}
/**
* gtk_clipboard_wait_for_targets:
* @clipboard: a #GtkClipboard
* @targets: (out) (array length=n_targets) (transfer container): location
* to store an array of targets. The result stored here must
* be freed with g_free().
* @n_targets: (out): location to store number of items in @targets.
*
* Returns a list of targets that are present on the clipboard, or %NULL
* if there arent any targets available. The returned list must be
* freed with g_free().
* This function waits for the data to be received using the main
* loop, so events, timeouts, etc, may be dispatched during the wait.
*
* Returns: %TRUE if any targets are present on the clipboard,
* otherwise %FALSE.
*
* Since: 2.4
*/
gboolean
gtk_clipboard_wait_for_targets (GtkClipboard *clipboard,
GdkAtom **targets,
gint *n_targets)
{
GtkSelectionData *data;
gboolean result = FALSE;
g_return_val_if_fail (clipboard != NULL, FALSE);
/* If the display supports change notification we cache targets */
if (gdk_display_supports_selection_notification (gtk_clipboard_get_display (clipboard)) &&
clipboard->n_cached_targets != -1)
{
if (n_targets)
*n_targets = clipboard->n_cached_targets;
if (targets)
*targets = g_memdup (clipboard->cached_targets,
clipboard->n_cached_targets * sizeof (GdkAtom));
return TRUE;
}
if (n_targets)
*n_targets = 0;
if (targets)
*targets = NULL;
data = gtk_clipboard_wait_for_contents (clipboard, gdk_atom_intern_static_string ("TARGETS"));
if (data)
{
GdkAtom *tmp_targets;
gint tmp_n_targets;
result = gtk_selection_data_get_targets (data, &tmp_targets, &tmp_n_targets);
if (gdk_display_supports_selection_notification (gtk_clipboard_get_display (clipboard)))
{
clipboard->n_cached_targets = tmp_n_targets;
clipboard->cached_targets = g_memdup (tmp_targets,
tmp_n_targets * sizeof (GdkAtom));
}
if (n_targets)
*n_targets = tmp_n_targets;
if (targets)
*targets = tmp_targets;
else
g_free (tmp_targets);
gtk_selection_data_free (data);
}
return result;
}
static GtkClipboard *
clipboard_peek (GdkDisplay *display,
GdkAtom selection,
gboolean only_if_exists)
{
GtkClipboard *clipboard = NULL;
GSList *clipboards;
GSList *tmp_list;
if (selection == GDK_NONE)
selection = GDK_SELECTION_CLIPBOARD;
clipboards = g_object_get_data (G_OBJECT (display), "gtk-clipboard-list");
tmp_list = clipboards;
while (tmp_list)
{
clipboard = tmp_list->data;
if (clipboard->selection == selection)
break;
tmp_list = tmp_list->next;
}
if (!tmp_list && !only_if_exists)
{
clipboard = g_object_new (GTK_TYPE_CLIPBOARD, NULL);
clipboard->selection = selection;
clipboard->display = display;
clipboard->n_cached_targets = -1;
clipboard->n_storable_targets = -1;
clipboards = g_slist_prepend (clipboards, clipboard);
g_object_set_data (G_OBJECT (display), I_("gtk-clipboard-list"), clipboards);
g_signal_connect (display, "closed",
G_CALLBACK (clipboard_display_closed), clipboard);
gdk_display_request_selection_notification (display, selection);
}
return clipboard;
}
static void
gtk_clipboard_owner_change (GtkClipboard *clipboard,
GdkEventOwnerChange *event)
{
if (clipboard->n_cached_targets != -1)
{
g_free (clipboard->cached_targets);
clipboard->cached_targets = NULL;
clipboard->n_cached_targets = -1;
}
}
/**
* gtk_clipboard_wait_is_target_available:
* @clipboard: a #GtkClipboard
* @target: A #GdkAtom indicating which target to look for.
*
* Checks if a clipboard supports pasting data of a given type. This
* function can be used to determine if a “Paste” menu item should be
* insensitive or not.
*
* If you want to see if theres text available on the clipboard, use
* gtk_clipboard_wait_is_text_available () instead.
*
* Returns: %TRUE if the target is available, %FALSE otherwise.
*
* Since: 2.6
*/
gboolean
gtk_clipboard_wait_is_target_available (GtkClipboard *clipboard,
GdkAtom target)
{
GdkAtom *targets;
gint i, n_targets;
gboolean retval = FALSE;
if (!gtk_clipboard_wait_for_targets (clipboard, &targets, &n_targets))
return FALSE;
for (i = 0; i < n_targets; i++)
{
if (targets[i] == target)
{
retval = TRUE;
break;
}
}
g_free (targets);
return retval;
}
/**
* _gtk_clipboard_handle_event:
* @event: a owner change event
*
* Emits the #GtkClipboard::owner-change signal on the appropriate @clipboard.
*
* Since: 2.6
**/
void
_gtk_clipboard_handle_event (GdkEventOwnerChange *event)
{
GdkDisplay *display;
GtkClipboard *clipboard;
display = gdk_window_get_display (event->window);
clipboard = clipboard_peek (display, event->selection, TRUE);
if (clipboard)
g_signal_emit (clipboard,
clipboard_signals[OWNER_CHANGE], 0, event, NULL);
}
static gboolean
gtk_clipboard_store_timeout (GtkClipboard *clipboard)
{
g_main_loop_quit (clipboard->store_loop);
return G_SOURCE_REMOVE;
}
/**
* gtk_clipboard_set_can_store:
* @clipboard: a #GtkClipboard
* @targets: (allow-none) (array length=n_targets): array containing
* information about which forms should be stored or %NULL
* to indicate that all forms should be stored.
* @n_targets: number of elements in @targets
*
* Hints that the clipboard data should be stored somewhere when the
* application exits or when gtk_clipboard_store () is called.
*
* This value is reset when the clipboard owner changes.
* Where the clipboard data is stored is platform dependent,
* see gdk_display_store_clipboard () for more information.
*
* Since: 2.6
*/
void
gtk_clipboard_set_can_store (GtkClipboard *clipboard,
const GtkTargetEntry *targets,
gint n_targets)
{
g_return_if_fail (GTK_IS_CLIPBOARD (clipboard));
g_return_if_fail (n_targets >= 0);
GTK_CLIPBOARD_GET_CLASS (clipboard)->set_can_store (clipboard,
targets,
n_targets);
}
static void
gtk_clipboard_real_set_can_store (GtkClipboard *clipboard,
const GtkTargetEntry *targets,
gint n_targets)
{
GtkWidget *clipboard_widget;
int i;
static const GtkTargetEntry save_targets[] = {
{ (char *) "SAVE_TARGETS", 0, TARGET_SAVE_TARGETS }
};
if (clipboard->selection != GDK_SELECTION_CLIPBOARD)
return;
g_free (clipboard->storable_targets);
clipboard_widget = get_clipboard_widget (clipboard->display);
/* n_storable_targets being -1 means that
* gtk_clipboard_set_can_store hasn't been called since the
* clipboard owner changed. We only want to add SAVE_TARGETS and
* ref the owner once , so we do that here
*/
if (clipboard->n_storable_targets == -1)
{
gtk_selection_add_targets (clipboard_widget, clipboard->selection,
save_targets, 1);
/* Ref the owner so it won't go away */
if (clipboard->have_owner)
g_object_ref (clipboard->user_data);
}
clipboard->n_storable_targets = n_targets;
clipboard->storable_targets = g_new (GdkAtom, n_targets);
for (i = 0; i < n_targets; i++)
clipboard->storable_targets[i] = gdk_atom_intern (targets[i].target, FALSE);
}
static gboolean
gtk_clipboard_selection_notify (GtkWidget *widget,
GdkEventSelection *event,
GtkClipboard *clipboard)
{
if (event->selection == gdk_atom_intern_static_string ("CLIPBOARD_MANAGER") &&
clipboard->storing_selection)
g_main_loop_quit (clipboard->store_loop);
return FALSE;
}
/**
* gtk_clipboard_store:
* @clipboard: a #GtkClipboard
*
* Stores the current clipboard data somewhere so that it will stay
* around after the application has quit.
*
* Since: 2.6
*/
void
gtk_clipboard_store (GtkClipboard *clipboard)
{
g_return_if_fail (GTK_IS_CLIPBOARD (clipboard));
GTK_CLIPBOARD_GET_CLASS (clipboard)->store (clipboard);
}
static void
gtk_clipboard_real_store (GtkClipboard *clipboard)
{
GtkWidget *clipboard_widget;
if (clipboard->n_storable_targets < 0)
return;
if (!gdk_display_supports_clipboard_persistence (clipboard->display))
return;
g_object_ref (clipboard);
clipboard_widget = get_clipboard_widget (clipboard->display);
clipboard->notify_signal_id = g_signal_connect (clipboard_widget,
"selection-notify-event",
G_CALLBACK (gtk_clipboard_selection_notify),
clipboard);
gdk_display_store_clipboard (clipboard->display,
gtk_widget_get_window (clipboard_widget),
clipboard_get_timestamp (clipboard),
clipboard->storable_targets,
clipboard->n_storable_targets);
clipboard->storing_selection = TRUE;
clipboard->store_loop = g_main_loop_new (NULL, TRUE);
clipboard->store_timeout = g_timeout_add_seconds (10, (GSourceFunc) gtk_clipboard_store_timeout, clipboard);
g_source_set_name_by_id (clipboard->store_timeout, "[gtk+] gtk_clipboard_store_timeout");
if (g_main_loop_is_running (clipboard->store_loop))
{
gdk_threads_leave ();
g_main_loop_run (clipboard->store_loop);
gdk_threads_enter ();
}
g_main_loop_unref (clipboard->store_loop);
clipboard->store_loop = NULL;
g_source_remove (clipboard->store_timeout);
clipboard->store_timeout = 0;
g_signal_handler_disconnect (clipboard_widget, clipboard->notify_signal_id);
clipboard->notify_signal_id = 0;
clipboard->storing_selection = FALSE;
g_object_unref (clipboard);
}
/* Stores all clipboard selections on all displays, called from
* gtk_main_quit ().
*/
void
_gtk_clipboard_store_all (void)
{
GtkClipboard *clipboard;
GSList *displays, *list;
displays = gdk_display_manager_list_displays (gdk_display_manager_get ());
list = displays;
while (list)
{
GdkDisplay *display = list->data;
clipboard = clipboard_peek (display, GDK_SELECTION_CLIPBOARD, TRUE);
if (clipboard)
gtk_clipboard_store (clipboard);
list = list->next;
}
g_slist_free (displays);
}
/**
* gtk_clipboard_get_selection:
* @clipboard: a #GtkClipboard
*
* Gets the selection that this clipboard is for.
*
* Returns: the selection
*
* Since: 3.22
*/
GdkAtom
gtk_clipboard_get_selection (GtkClipboard *clipboard)
{
g_return_val_if_fail (GTK_IS_CLIPBOARD (clipboard), GDK_NONE);
return clipboard->selection;
}