diff options
Diffstat (limited to 'ui/gtk-clipboard.c')
| -rw-r--r-- | ui/gtk-clipboard.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/ui/gtk-clipboard.c b/ui/gtk-clipboard.c new file mode 100644 index 0000000000..bff28d2030 --- /dev/null +++ b/ui/gtk-clipboard.c @@ -0,0 +1,192 @@ +/* + * GTK UI -- clipboard support + * + * Copyright (C) 2021 Gerd Hoffmann <kraxel@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + * + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "qemu/main-loop.h" + +#include "ui/gtk.h" + +static QemuClipboardSelection gd_find_selection(GtkDisplayState *gd, + GtkClipboard *clipboard) +{ + QemuClipboardSelection s; + + for (s = 0; s < QEMU_CLIPBOARD_SELECTION__COUNT; s++) { + if (gd->gtkcb[s] == clipboard) { + return s; + } + } + return QEMU_CLIPBOARD_SELECTION_CLIPBOARD; +} + +static void gd_clipboard_get_data(GtkClipboard *clipboard, + GtkSelectionData *selection_data, + guint selection_info, + gpointer data) +{ + GtkDisplayState *gd = data; + QemuClipboardSelection s = gd_find_selection(gd, clipboard); + QemuClipboardType type = QEMU_CLIPBOARD_TYPE_TEXT; + QemuClipboardInfo *info = qemu_clipboard_info_ref(gd->cbinfo[s]); + + qemu_clipboard_request(info, type); + while (info == gd->cbinfo[s] && + info->types[type].available && + info->types[type].data == NULL) { + main_loop_wait(false); + } + + if (info == gd->cbinfo[s] && gd->cbowner[s]) { + gtk_selection_data_set_text(selection_data, + info->types[type].data, + info->types[type].size); + } else { + /* clipboard owner changed while waiting for the data */ + } + + qemu_clipboard_info_unref(info); +} + +static void gd_clipboard_clear(GtkClipboard *clipboard, + gpointer data) +{ + GtkDisplayState *gd = data; + QemuClipboardSelection s = gd_find_selection(gd, clipboard); + + gd->cbowner[s] = false; +} + +static void gd_clipboard_notify(Notifier *notifier, void *data) +{ + GtkDisplayState *gd = container_of(notifier, GtkDisplayState, cbpeer.update); + QemuClipboardInfo *info = data; + QemuClipboardSelection s = info->selection; + bool self_update = info->owner == &gd->cbpeer; + + if (info != gd->cbinfo[s]) { + qemu_clipboard_info_unref(gd->cbinfo[s]); + gd->cbinfo[s] = qemu_clipboard_info_ref(info); + gd->cbpending[s] = 0; + if (!self_update) { + GtkTargetList *list; + GtkTargetEntry *targets; + gint n_targets; + + list = gtk_target_list_new(NULL, 0); + if (info->types[QEMU_CLIPBOARD_TYPE_TEXT].available) { + gtk_target_list_add_text_targets(list, 0); + } + targets = gtk_target_table_new_from_list(list, &n_targets); + + gtk_clipboard_clear(gd->gtkcb[s]); + gd->cbowner[s] = true; + gtk_clipboard_set_with_data(gd->gtkcb[s], + targets, n_targets, + gd_clipboard_get_data, + gd_clipboard_clear, + gd); + + gtk_target_table_free(targets, n_targets); + gtk_target_list_unref(list); + } + return; + } + + if (self_update) { + return; + } + + /* + * Clipboard got updated, with data probably. No action here, we + * are waiting for updates in gd_clipboard_get_data(). + */ +} + +static void gd_clipboard_request(QemuClipboardInfo *info, + QemuClipboardType type) +{ + GtkDisplayState *gd = container_of(info->owner, GtkDisplayState, cbpeer); + char *text; + + switch (type) { + case QEMU_CLIPBOARD_TYPE_TEXT: + text = gtk_clipboard_wait_for_text(gd->gtkcb[info->selection]); + if (text) { + qemu_clipboard_set_data(&gd->cbpeer, info, type, + strlen(text), text, true); + g_free(text); + } + break; + default: + break; + } +} + +static void gd_owner_change(GtkClipboard *clipboard, + GdkEvent *event, + gpointer data) +{ + GtkDisplayState *gd = data; + QemuClipboardSelection s = gd_find_selection(gd, clipboard); + QemuClipboardInfo *info; + + if (gd->cbowner[s]) { + /* ignore notifications about our own grabs */ + return; + } + + + switch (event->owner_change.reason) { + case GDK_SETTING_ACTION_NEW: + info = qemu_clipboard_info_new(&gd->cbpeer, s); + if (gtk_clipboard_wait_is_text_available(clipboard)) { + info->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true; + } + + qemu_clipboard_update(info); + qemu_clipboard_info_unref(info); + break; + default: + break; + } +} + +void gd_clipboard_init(GtkDisplayState *gd) +{ + gd->cbpeer.name = "gtk"; + gd->cbpeer.update.notify = gd_clipboard_notify; + gd->cbpeer.request = gd_clipboard_request; + qemu_clipboard_peer_register(&gd->cbpeer); + + gd->gtkcb[QEMU_CLIPBOARD_SELECTION_CLIPBOARD] = + gtk_clipboard_get(gdk_atom_intern("CLIPBOARD", FALSE)); + gd->gtkcb[QEMU_CLIPBOARD_SELECTION_PRIMARY] = + gtk_clipboard_get(gdk_atom_intern("PRIMARY", FALSE)); + gd->gtkcb[QEMU_CLIPBOARD_SELECTION_SECONDARY] = + gtk_clipboard_get(gdk_atom_intern("SECONDARY", FALSE)); + + g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_CLIPBOARD], + "owner-change", G_CALLBACK(gd_owner_change), gd); + g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_PRIMARY], + "owner-change", G_CALLBACK(gd_owner_change), gd); + g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_SECONDARY], + "owner-change", G_CALLBACK(gd_owner_change), gd); +} |