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 g_autoptr(QemuClipboardInfo) info = NULL; 49 50 info = qemu_clipboard_info_ref(qemu_clipboard_info(s)); 51 52 qemu_clipboard_request(info, type); 53 while (info == qemu_clipboard_info(s) && 54 info->types[type].available && 55 info->types[type].data == NULL) { 56 main_loop_wait(false); 57 } 58 59 if (info == qemu_clipboard_info(s) && gd->cbowner[s]) { 60 gtk_selection_data_set_text(selection_data, 61 info->types[type].data, 62 info->types[type].size); 63 } else { 64 /* clipboard owner changed while waiting for the data */ 65 } 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_update_info(GtkDisplayState *gd, 78 QemuClipboardInfo *info) 79 { 80 QemuClipboardSelection s = info->selection; 81 bool self_update = info->owner == &gd->cbpeer; 82 83 if (info != qemu_clipboard_info(s)) { 84 gd->cbpending[s] = 0; 85 if (!self_update) { 86 g_autoptr(GtkTargetList) list = NULL; 87 GtkTargetEntry *targets; 88 gint n_targets; 89 90 list = gtk_target_list_new(NULL, 0); 91 if (info->types[QEMU_CLIPBOARD_TYPE_TEXT].available) { 92 gtk_target_list_add_text_targets(list, 0); 93 } 94 targets = gtk_target_table_new_from_list(list, &n_targets); 95 96 gtk_clipboard_clear(gd->gtkcb[s]); 97 if (targets) { 98 gd->cbowner[s] = true; 99 gtk_clipboard_set_with_data(gd->gtkcb[s], 100 targets, n_targets, 101 gd_clipboard_get_data, 102 gd_clipboard_clear, 103 gd); 104 105 gtk_target_table_free(targets, n_targets); 106 } 107 } 108 return; 109 } 110 111 if (self_update) { 112 return; 113 } 114 115 /* 116 * Clipboard got updated, with data probably. No action here, we 117 * are waiting for updates in gd_clipboard_get_data(). 118 */ 119 } 120 121 static void gd_clipboard_notify(Notifier *notifier, void *data) 122 { 123 GtkDisplayState *gd = 124 container_of(notifier, GtkDisplayState, cbpeer.notifier); 125 QemuClipboardNotify *notify = data; 126 127 switch (notify->type) { 128 case QEMU_CLIPBOARD_UPDATE_INFO: 129 gd_clipboard_update_info(gd, notify->info); 130 return; 131 case QEMU_CLIPBOARD_RESET_SERIAL: 132 /* ignore */ 133 return; 134 } 135 } 136 137 static void gd_clipboard_request(QemuClipboardInfo *info, 138 QemuClipboardType type) 139 { 140 GtkDisplayState *gd = container_of(info->owner, GtkDisplayState, cbpeer); 141 char *text; 142 143 switch (type) { 144 case QEMU_CLIPBOARD_TYPE_TEXT: 145 text = gtk_clipboard_wait_for_text(gd->gtkcb[info->selection]); 146 if (text) { 147 qemu_clipboard_set_data(&gd->cbpeer, info, type, 148 strlen(text), text, true); 149 g_free(text); 150 } 151 break; 152 default: 153 break; 154 } 155 } 156 157 static void gd_owner_change(GtkClipboard *clipboard, 158 GdkEvent *event, 159 gpointer data) 160 { 161 GtkDisplayState *gd = data; 162 QemuClipboardSelection s = gd_find_selection(gd, clipboard); 163 QemuClipboardInfo *info; 164 165 if (gd->cbowner[s]) { 166 /* ignore notifications about our own grabs */ 167 return; 168 } 169 170 171 switch (event->owner_change.reason) { 172 case GDK_OWNER_CHANGE_NEW_OWNER: 173 info = qemu_clipboard_info_new(&gd->cbpeer, s); 174 if (gtk_clipboard_wait_is_text_available(clipboard)) { 175 info->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true; 176 } 177 178 qemu_clipboard_update(info); 179 qemu_clipboard_info_unref(info); 180 break; 181 default: 182 qemu_clipboard_peer_release(&gd->cbpeer, s); 183 gd->cbowner[s] = false; 184 break; 185 } 186 } 187 188 void gd_clipboard_init(GtkDisplayState *gd) 189 { 190 gd->cbpeer.name = "gtk"; 191 gd->cbpeer.notifier.notify = gd_clipboard_notify; 192 gd->cbpeer.request = gd_clipboard_request; 193 qemu_clipboard_peer_register(&gd->cbpeer); 194 195 gd->gtkcb[QEMU_CLIPBOARD_SELECTION_CLIPBOARD] = 196 gtk_clipboard_get(GDK_SELECTION_CLIPBOARD); 197 gd->gtkcb[QEMU_CLIPBOARD_SELECTION_PRIMARY] = 198 gtk_clipboard_get(GDK_SELECTION_PRIMARY); 199 gd->gtkcb[QEMU_CLIPBOARD_SELECTION_SECONDARY] = 200 gtk_clipboard_get(GDK_SELECTION_SECONDARY); 201 202 g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_CLIPBOARD], 203 "owner-change", G_CALLBACK(gd_owner_change), gd); 204 g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_PRIMARY], 205 "owner-change", G_CALLBACK(gd_owner_change), gd); 206 g_signal_connect(gd->gtkcb[QEMU_CLIPBOARD_SELECTION_SECONDARY], 207 "owner-change", G_CALLBACK(gd_owner_change), gd); 208 } 209