1 /* 2 * GTK UI -- clipboard support 3 * 4 * Copyright (C) 2021 Gerd Hoffmann <kraxel@redhat.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 * 19 */ 20 21 #include "qemu/osdep.h" 22 #include "qemu-common.h" 23 #include "qemu/main-loop.h" 24 25 #include "ui/gtk.h" 26 27 static QemuClipboardSelection gd_find_selection(GtkDisplayState *gd, 28 GtkClipboard *clipboard) 29 { 30 QemuClipboardSelection s; 31 32 for (s = 0; s < QEMU_CLIPBOARD_SELECTION__COUNT; s++) { 33 if (gd->gtkcb[s] == clipboard) { 34 return s; 35 } 36 } 37 return QEMU_CLIPBOARD_SELECTION_CLIPBOARD; 38 } 39 40 static void gd_clipboard_get_data(GtkClipboard *clipboard, 41 GtkSelectionData *selection_data, 42 guint selection_info, 43 gpointer data) 44 { 45 GtkDisplayState *gd = data; 46 QemuClipboardSelection s = gd_find_selection(gd, clipboard); 47 QemuClipboardType type = QEMU_CLIPBOARD_TYPE_TEXT; 48 QemuClipboardInfo *info = qemu_clipboard_info_ref(gd->cbinfo[s]); 49 50 qemu_clipboard_request(info, type); 51 while (info == gd->cbinfo[s] && 52 info->types[type].available && 53 info->types[type].data == NULL) { 54 main_loop_wait(false); 55 } 56 57 if (info == gd->cbinfo[s] && gd->cbowner[s]) { 58 gtk_selection_data_set_text(selection_data, 59 info->types[type].data, 60 info->types[type].size); 61 } else { 62 /* clipboard owner changed while waiting for the data */ 63 } 64 65 qemu_clipboard_info_unref(info); 66 } 67 68 static void gd_clipboard_clear(GtkClipboard *clipboard, 69 gpointer data) 70 { 71 GtkDisplayState *gd = data; 72 QemuClipboardSelection s = gd_find_selection(gd, clipboard); 73 74 gd->cbowner[s] = false; 75 } 76 77 static void gd_clipboard_notify(Notifier *notifier, void *data) 78 { 79 GtkDisplayState *gd = container_of(notifier, GtkDisplayState, cbpeer.update); 80 QemuClipboardInfo *info = data; 81 QemuClipboardSelection s = info->selection; 82 bool self_update = info->owner == &gd->cbpeer; 83 84 if (info != gd->cbinfo[s]) { 85 qemu_clipboard_info_unref(gd->cbinfo[s]); 86 gd->cbinfo[s] = qemu_clipboard_info_ref(info); 87 gd->cbpending[s] = 0; 88 if (!self_update) { 89 GtkTargetList *list; 90 GtkTargetEntry *targets; 91 gint n_targets; 92 93 list = gtk_target_list_new(NULL, 0); 94 if (info->types[QEMU_CLIPBOARD_TYPE_TEXT].available) { 95 gtk_target_list_add_text_targets(list, 0); 96 } 97 targets = gtk_target_table_new_from_list(list, &n_targets); 98 99 gtk_clipboard_clear(gd->gtkcb[s]); 100 gd->cbowner[s] = true; 101 gtk_clipboard_set_with_data(gd->gtkcb[s], 102 targets, n_targets, 103 gd_clipboard_get_data, 104 gd_clipboard_clear, 105 gd); 106 107 gtk_target_table_free(targets, n_targets); 108 gtk_target_list_unref(list); 109 } 110 return; 111 } 112 113 if (self_update) { 114 return; 115 } 116 117 /* 118 * Clipboard got updated, with data probably. No action here, we 119 * are waiting for updates in gd_clipboard_get_data(). 120 */ 121 } 122 123 static void gd_clipboard_request(QemuClipboardInfo *info, 124 QemuClipboardType type) 125 { 126 GtkDisplayState *gd = container_of(info->owner, GtkDisplayState, cbpeer); 127 char *text; 128 129 switch (type) { 130 case QEMU_CLIPBOARD_TYPE_TEXT: 131 text = gtk_clipboard_wait_for_text(gd->gtkcb[info->selection]); 132 if (text) { 133 qemu_clipboard_set_data(&gd->cbpeer, info, type, 134 strlen(text), text, true); 135 g_free(text); 136 } 137 break; 138 default: 139 break; 140 } 141 } 142 143 static void gd_owner_change(GtkClipboard *clipboard, 144 GdkEvent *event, 145 gpointer data) 146 { 147 GtkDisplayState *gd = data; 148 QemuClipboardSelection s = gd_find_selection(gd, clipboard); 149 QemuClipboardInfo *info; 150 151 if (gd->cbowner[s]) { 152 /* ignore notifications about our own grabs */ 153 return; 154 } 155 156 157 switch (event->owner_change.reason) { 158 case GDK_SETTING_ACTION_NEW: 159 info = qemu_clipboard_info_new(&gd->cbpeer, s); 160 if (gtk_clipboard_wait_is_text_available(clipboard)) { 161 info->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true; 162 } 163 164 qemu_clipboard_update(info); 165 qemu_clipboard_info_unref(info); 166 break; 167 default: 168 break; 169 } 170 } 171 172 void gd_clipboard_init(GtkDisplayState *gd) 173 { 174 gd->cbpeer.name = "gtk"; 175 gd->cbpeer.update.notify = gd_clipboard_notify; 176 gd->cbpeer.request = gd_clipboard_request; 177 qemu_clipboard_peer_register(&gd->cbpeer); 178 179 gd->gtkcb[QEMU_CLIPBOARD_SELECTION_CLIPBOARD] = 180 gtk_clipboard_get(gdk_atom_intern("CLIPBOARD", FALSE)); 181 gd->gtkcb[QEMU_CLIPBOARD_SELECTION_PRIMARY] = 182 gtk_clipboard_get(gdk_atom_intern("PRIMARY", FALSE)); 183 gd->gtkcb[QEMU_CLIPBOARD_SELECTION_SECONDARY] = 184 gtk_clipboard_get(gdk_atom_intern("SECONDARY", FALSE)); 185 186 g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_CLIPBOARD], 187 "owner-change", G_CALLBACK(gd_owner_change), gd); 188 g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_PRIMARY], 189 "owner-change", G_CALLBACK(gd_owner_change), gd); 190 g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_SECONDARY], 191 "owner-change", G_CALLBACK(gd_owner_change), gd); 192 } 193