gio/gappinfo.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright (C) 2006-2007 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Author: Alexander Larsson <alexl@redhat.com>
  21  */
  22
  23 #include <config.h>
  24 #include "gappinfo.h"
  25 #include "glibintl.h"
  26 #include <gioerror.h>
  27 #include <gfile.h>
  28
  29 #include "gioalias.h"
  30
  31 /**
  32  * SECTION:gappinfo
  33  * @short_description: Application information and launch contexts
  34  * @include: gio/gio.h
  35  *
  36  * #GAppInfo and #GAppLaunchContext are used for describing and launching
  37  * applications installed on the system.
  38  *
  39  **/
  40
  41 static void g_app_info_base_init (gpointer g_class);
  42 static void g_app_info_class_init (gpointer g_class,
  43                                    gpointer class_data);
  44
  45
  46 GType
  47 g_app_info_get_type (void)
  48 {
  49   static GType app_info_type = 0;
  50
  51   if (! app_info_type)
  52     {
  53       static const GTypeInfo app_info_info =
  54       {
  55         sizeof (GAppInfoIface), /* class_size */
  56         g_app_info_base_init,   /* base_init */
  57         NULL,           /* base_finalize */
  58         g_app_info_class_init,
  59         NULL,           /* class_finalize */
  60         NULL,           /* class_data */
  61         0,
  62         0,              /* n_preallocs */
  63         NULL
  64       };
  65
  66       app_info_type =
  67         g_type_register_static (G_TYPE_INTERFACE, I_("GAppInfo"),
  68                                 &app_info_info, 0);
  69
  70       g_type_interface_add_prerequisite (app_info_type, G_TYPE_OBJECT);
  71     }
  72
  73   return app_info_type;
  74 }
  75
  76 static void
  77 g_app_info_class_init (gpointer g_class,
  78                        gpointer class_data)
  79 {
  80 }
  81
  82 static void
  83 g_app_info_base_init (gpointer g_class)
  84 {
  85 }
  86
  87
  88 /**
  89  * g_app_info_dup:
  90  * @appinfo: a #GAppInfo.
  91  *
  92  * Creates a duplicate of a #GAppInfo.
  93  *
  94  * Returns: a duplicate of @appinfo.
  95  **/
  96 GAppInfo *
  97 g_app_info_dup (GAppInfo *appinfo)
  98 {
  99   GAppInfoIface *iface;
 100
 101   g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
 102
 103   iface = G_APP_INFO_GET_IFACE (appinfo);
 104
 105   return (* iface->dup) (appinfo);
 106 }
 107
 108 /**
 109  * g_app_info_equal:
 110  * @appinfo1: the first #GAppInfo.
 111  * @appinfo2: the second #GAppInfo.
 112  *
 113  * Checks if two #GAppInfos are equal.
 114  *
 115  * Returns: %TRUE if @appinfo1 is equal to @appinfo2. %FALSE otherwise.
 116  **/
 117 gboolean
 118 g_app_info_equal (GAppInfo *appinfo1,
 119                   GAppInfo *appinfo2)
 120 {
 121   GAppInfoIface *iface;
 122
 123   g_return_val_if_fail (G_IS_APP_INFO (appinfo1), FALSE);
 124   g_return_val_if_fail (G_IS_APP_INFO (appinfo2), FALSE);
 125
 126   if (G_TYPE_FROM_INSTANCE (appinfo1) != G_TYPE_FROM_INSTANCE (appinfo2))
 127     return FALSE;
 128
 129   iface = G_APP_INFO_GET_IFACE (appinfo1);
 130
 131   return (* iface->equal) (appinfo1, appinfo2);
 132 }
 133
 134 /**
 135  * g_app_info_get_id:
 136  * @appinfo: a #GAppInfo.
 137  *
 138  * Gets the ID of an application. An id is a string that
 139  * identifies the application. The exact format of the id is
 140  * platform dependent. For instance, on Unix this is the
 141  * desktop file id from the xdg menu specification.
 142  *
 143  * Note that the returned ID may be %NULL, depending on how
 144  * the @appinfo has been constructed.
 145  *
 146  * Returns: a string containing the application's ID.
 147  **/
 148 const char *
 149 g_app_info_get_id (GAppInfo *appinfo)
 150 {
 151   GAppInfoIface *iface;
 152
 153   g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
 154
 155   iface = G_APP_INFO_GET_IFACE (appinfo);
 156
 157   return (* iface->get_id) (appinfo);
 158 }
 159
 160 /**
 161  * g_app_info_get_name:
 162  * @appinfo: a #GAppInfo.
 163  *
 164  * Gets the installed name of the application.
 165  *
 166  * Returns: the name of the application for @appinfo.
 167  **/
 168 const char *
 169 g_app_info_get_name (GAppInfo *appinfo)
 170 {
 171   GAppInfoIface *iface;
 172
 173   g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
 174
 175   iface = G_APP_INFO_GET_IFACE (appinfo);
 176
 177   return (* iface->get_name) (appinfo);
 178 }
 179
 180 /**
 181  * g_app_info_get_description:
 182  * @appinfo: a #GAppInfo.
 183  *
 184  * Gets a human-readable description of an installed application.
 185  *
 186  * Returns: a string containing a description of the
 187  * application @appinfo, or %NULL if none.
 188  **/
 189 const char *
 190 g_app_info_get_description (GAppInfo *appinfo)
 191 {
 192   GAppInfoIface *iface;
 193
 194   g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
 195
 196   iface = G_APP_INFO_GET_IFACE (appinfo);
 197
 198   return (* iface->get_description) (appinfo);
 199 }
 200
 201 /**
 202  * g_app_info_get_executable:
 203  * @appinfo: a #GAppInfo.
 204  *
 205  * Gets the executable's name for the installed application.
 206  *
 207  * Returns: a string containing the @appinfo's application
 208  * binary's name.
 209  **/
 210 const char *
 211 g_app_info_get_executable (GAppInfo *appinfo)
 212 {
 213   GAppInfoIface *iface;
 214
 215   g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
 216
 217   iface = G_APP_INFO_GET_IFACE (appinfo);
 218
 219   return (* iface->get_executable) (appinfo);
 220 }
 221
 222
 223 /**
 224  * g_app_info_set_as_default_for_type:
 225  * @appinfo: a #GAppInfo.
 226  * @content_type: the content type.
 227  * @error: a #GError.
 228  *
 229  * Sets the application as the default handler for a given type.
 230  *
 231  * Returns: %TRUE on success, %FALSE on error.
 232  **/
 233 gboolean
 234 g_app_info_set_as_default_for_type (GAppInfo    *appinfo,
 235                                     const char  *content_type,
 236                                     GError     **error)
 237 {
 238   GAppInfoIface *iface;
 239
 240   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 241   g_return_val_if_fail (content_type != NULL, FALSE);
 242
 243   iface = G_APP_INFO_GET_IFACE (appinfo);
 244
 245   return (* iface->set_as_default_for_type) (appinfo, content_type, error);
 246 }
 247
 248
 249 /**
 250  * g_app_info_set_as_default_for_extension:
 251  * @appinfo: a #GAppInfo.
 252  * @extension: a string containing the file extension (without the dot).
 253  * @error: a #GError.
 254  *
 255  * Sets the application as the default handler for the given file extention.
 256  *
 257  * Returns: %TRUE on success, %FALSE on error.
 258  **/
 259 gboolean
 260 g_app_info_set_as_default_for_extension (GAppInfo    *appinfo,
 261                                          const char  *extension,
 262                                          GError     **error)
 263 {
 264   GAppInfoIface *iface;
 265
 266   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 267   g_return_val_if_fail (extension != NULL, FALSE);
 268
 269   iface = G_APP_INFO_GET_IFACE (appinfo);
 270
 271   if (iface->set_as_default_for_extension)
 272     return (* iface->set_as_default_for_extension) (appinfo, extension, error);
 273
 274   g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED, "g_app_info_set_as_default_for_extension not supported yet");
 275   return FALSE;
 276 }
 277
 278
 279 /**
 280  * g_app_info_add_supports_type:
 281  * @appinfo: a #GAppInfo.
 282  * @content_type: a string.
 283  * @error: a #GError.
 284  *
 285  * Adds a content type to the application information to indicate the
 286  * application is capable of opening files with the given content type.
 287  *
 288  * Returns: %TRUE on success, %FALSE on error.
 289  **/
 290 gboolean
 291 g_app_info_add_supports_type (GAppInfo    *appinfo,
 292                               const char  *content_type,
 293                               GError     **error)
 294 {
 295   GAppInfoIface *iface;
 296
 297   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 298   g_return_val_if_fail (content_type != NULL, FALSE);
 299
 300   iface = G_APP_INFO_GET_IFACE (appinfo);
 301
 302   if (iface->add_supports_type)
 303     return (* iface->add_supports_type) (appinfo, content_type, error);
 304
 305   g_set_error (error, G_IO_ERROR,
 306                G_IO_ERROR_NOT_SUPPORTED,
 307                "g_app_info_add_supports_type not supported yet");
 308
 309   return FALSE;
 310 }
 311
 312
 313 /**
 314  * g_app_info_can_remove_supports_type:
 315  * @appinfo: a #GAppInfo.
 316  *
 317  * Checks if a supported content type can be removed from an application.
 318  *
 319  * Returns: %TRUE if it is possible to remove supported
 320  *     content types from a given @appinfo, %FALSE if not.
 321  **/
 322 gboolean
 323 g_app_info_can_remove_supports_type (GAppInfo *appinfo)
 324 {
 325   GAppInfoIface *iface;
 326
 327   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 328
 329   iface = G_APP_INFO_GET_IFACE (appinfo);
 330
 331   if (iface->can_remove_supports_type)
 332     return (* iface->can_remove_supports_type) (appinfo);
 333
 334   return FALSE;
 335 }
 336
 337
 338 /**
 339  * g_app_info_remove_supports_type:
 340  * @appinfo: a #GAppInfo.
 341  * @content_type: a string.
 342  * @error: a #GError.
 343  *
 344  * Removes a supported type from an application, if possible.
 345  *
 346  * Returns: %TRUE on success, %FALSE on error.
 347  **/
 348 gboolean
 349 g_app_info_remove_supports_type (GAppInfo    *appinfo,
 350                                  const char  *content_type,
 351                                  GError     **error)
 352 {
 353   GAppInfoIface *iface;
 354
 355   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 356   g_return_val_if_fail (content_type != NULL, FALSE);
 357
 358   iface = G_APP_INFO_GET_IFACE (appinfo);
 359
 360   if (iface->remove_supports_type)
 361     return (* iface->remove_supports_type) (appinfo, content_type, error);
 362
 363   g_set_error (error, G_IO_ERROR,
 364                G_IO_ERROR_NOT_SUPPORTED,
 365                "g_app_info_remove_supports_type not supported yet");
 366
 367   return FALSE;
 368 }
 369
 370
 371 /**
 372  * g_app_info_get_icon:
 373  * @appinfo: a #GAppInfo.
 374  *
 375  * Gets the icon for the application.
 376  *
 377  * Returns: the default #GIcon for @appinfo.
 378  **/
 379 GIcon *
 380 g_app_info_get_icon (GAppInfo *appinfo)
 381 {
 382   GAppInfoIface *iface;
 383
 384   g_return_val_if_fail (G_IS_APP_INFO (appinfo), NULL);
 385
 386   iface = G_APP_INFO_GET_IFACE (appinfo);
 387
 388   return (* iface->get_icon) (appinfo);
 389 }
 390
 391
 392 /**
 393  * g_app_info_launch:
 394  * @appinfo: a #GAppInfo.
 395  * @files: a #GList of #GFile objects.
 396  * @launch_context: a #GAppLaunchContext.
 397  * @error: a #GError.
 398  *
 399  * Launches the application. Passes @files to the launched application
 400  * as arguments, using the optional @launch_context to get information
 401  * about the details of the launcher (like what screen it is on).
 402  * On error, @error will be set accordingly.
 403  *
 404  * To lauch the application without arguments pass a %NULL @files list.
 405  *
 406  * Note that even if the launch is successful the application launched
 407  * can fail to start if it runs into problems during startup. There is
 408  * no way to detect this.
 409  *
 410  * Some URIs can be changed when passed through a GFile (for instance
 411  * unsupported uris with strange formats like mailto:), so if you have
 412  * a textual uri you want to pass in as argument, consider using
 413  * g_app_info_launch_uris() instead.
 414  *
 415  * Returns: %TRUE on successful launch, %FALSE otherwise.
 416  **/
 417 gboolean
 418 g_app_info_launch (GAppInfo           *appinfo,
 419                    GList              *files,
 420                    GAppLaunchContext  *launch_context,
 421                    GError            **error)
 422 {
 423   GAppInfoIface *iface;
 424
 425   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 426
 427   iface = G_APP_INFO_GET_IFACE (appinfo);
 428
 429   return (* iface->launch) (appinfo, files, launch_context, error);
 430 }
 431
 432
 433 /**
 434  * g_app_info_supports_uris:
 435  * @appinfo: a #GAppInfo.
 436  *
 437  * Checks if the application supports reading files and directories from URIs.
 438  *
 439  * Returns: %TRUE if the @appinfo supports URIs.
 440  **/
 441 gboolean
 442 g_app_info_supports_uris (GAppInfo *appinfo)
 443 {
 444   GAppInfoIface *iface;
 445
 446   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 447
 448   iface = G_APP_INFO_GET_IFACE (appinfo);
 449
 450   return (* iface->supports_uris) (appinfo);
 451 }
 452
 453
 454 /**
 455  * g_app_info_supports_files:
 456  * @appinfo: a #GAppInfo.
 457  *
 458  * Checks if the application accepts files as arguments.
 459  *
 460  * Returns: %TRUE if the @appinfo supports files.
 461  **/
 462 gboolean
 463 g_app_info_supports_files (GAppInfo *appinfo)
 464 {
 465   GAppInfoIface *iface;
 466
 467   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 468
 469   iface = G_APP_INFO_GET_IFACE (appinfo);
 470
 471   return (* iface->supports_files) (appinfo);
 472 }
 473
 474
 475 /**
 476  * g_app_info_launch_uris:
 477  * @appinfo: a #GAppInfo.
 478  * @uris: a #GList containing URIs to launch.
 479  * @launch_context: a #GAppLaunchContext.
 480  * @error: a #GError.
 481  *
 482  * Launches the application. Passes @uris to the launched application
 483  * as arguments, using the optional @launch_context to get information
 484  * about the details of the launcher (like what screen it is on).
 485  * On error, @error will be set accordingly.
 486  *
 487  * To lauch the application without arguments pass a %NULL @uris list.
 488  *
 489  * Note that even if the launch is successful the application launched
 490  * can fail to start if it runs into problems during startup. There is
 491  * no way to detect this.
 492  *
 493  * Returns: %TRUE on successful launch, %FALSE otherwise.
 494  **/
 495 gboolean
 496 g_app_info_launch_uris (GAppInfo           *appinfo,
 497                         GList              *uris,
 498                         GAppLaunchContext  *launch_context,
 499                         GError            **error)
 500 {
 501   GAppInfoIface *iface;
 502
 503   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 504
 505   iface = G_APP_INFO_GET_IFACE (appinfo);
 506
 507   return (* iface->launch_uris) (appinfo, uris, launch_context, error);
 508 }
 509
 510
 511 /**
 512  * g_app_info_should_show:
 513  * @appinfo: a #GAppInfo.
 514  *
 515  * Checks if the application info should be shown in menus that
 516  * list available applications.
 517  *
 518  * Returns: %TRUE if the @appinfo should be shown, %FALSE otherwise.
 519  **/
 520 gboolean
 521 g_app_info_should_show (GAppInfo *appinfo)
 522 {
 523   GAppInfoIface *iface;
 524
 525   g_return_val_if_fail (G_IS_APP_INFO (appinfo), FALSE);
 526
 527   iface = G_APP_INFO_GET_IFACE (appinfo);
 528
 529   return (* iface->should_show) (appinfo);
 530 }
 531
 532 /**
 533  * g_app_info_launch_default_for_uri:
 534  * @uri: the uri to show
 535  * @launch_context: an optional #GAppLaunchContext.
 536  * @error: a #GError.
 537  *
 538  * Utility function that launches the default application
 539  * registered to handle the specified uri. Synchronous I/O
 540  * is done on the uri to detext the type of the file if
 541  * required.
 542  *
 543  * Returns: %TRUE on success, %FALSE on error.
 544  **/
 545 gboolean
 546 g_app_info_launch_default_for_uri (const char         *uri,
 547                                    GAppLaunchContext  *launch_context,
 548                                    GError            **error)
 549 {
 550   GAppInfo *app_info;
 551   GFile *file;
 552   GList l;
 553   gboolean res;
 554
 555   file = g_file_new_for_uri (uri);
 556   app_info = g_file_query_default_handler (file, NULL, error);
 557   g_object_unref (file);
 558   if (app_info == NULL)
 559     return FALSE;
 560
 561   /* Use the uri, not the GFile, as the GFile roundtrip may
 562    * affect the uri which we don't want (for instance for a
 563    * mailto: uri).
 564    */
 565   l.data = (char *)uri;
 566   l.next = l.prev = NULL;
 567   res = g_app_info_launch_uris (app_info, &l,
 568                                 launch_context, error);
 569
 570   g_object_unref (app_info);
 571
 572   return res;
 573 }
 574
 575
 576 G_DEFINE_TYPE (GAppLaunchContext, g_app_launch_context, G_TYPE_OBJECT);
 577
 578 /**
 579  * g_app_launch_context_new:
 580  *
 581  * Creates a new application launch context. This is not normally used,
 582  * instead you instantiate a subclass of this, such as #GdkAppLaunchContext.
 583  *
 584  * Returns: a #GAppLaunchContext.
 585  **/
 586 GAppLaunchContext *
 587 g_app_launch_context_new (void)
 588 {
 589   return g_object_new (G_TYPE_APP_LAUNCH_CONTEXT, NULL);
 590 }
 591
 592 static void
 593 g_app_launch_context_class_init (GAppLaunchContextClass *klass)
 594 {
 595 }
 596
 597 static void
 598 g_app_launch_context_init (GAppLaunchContext *launch_context)
 599 {
 600 }
 601
 602 /**
 603  * g_app_launch_context_get_display:
 604  * @context: a #GAppLaunchContext.
 605  * @info: a #GAppInfo.
 606  * @files: a #GList of files.
 607  *
 608  * Gets the display string for the display. This is used to ensure new
 609  * applications are started on the same display as the launching
 610  * application.
 611  *
 612  * Returns: a display string for the display.
 613  **/
 614 char *
 615 g_app_launch_context_get_display (GAppLaunchContext *context,
 616                                   GAppInfo          *info,
 617                                   GList             *files)
 618 {
 619   GAppLaunchContextClass *class;
 620
 621   g_return_val_if_fail (G_IS_APP_LAUNCH_CONTEXT (context), NULL);
 622   g_return_val_if_fail (G_IS_APP_INFO (info), NULL);
 623
 624   class = G_APP_LAUNCH_CONTEXT_GET_CLASS (context);
 625
 626   if (class->get_display == NULL)
 627     return NULL;
 628
 629   return class->get_display (context, info, files);
 630 }
 631
 632 /**
 633  * g_app_launch_context_get_startup_notify_id:
 634  * @context: a #GAppLaunchContext.
 635  * @info: a #GAppInfo.
 636  * @files: a #GList of files.
 637  *
 638  * Initiates startup notification for the applicaiont and returns the
 639  * DESKTOP_STARTUP_ID for the launched operation, if supported.
 640  *
 641  * Startup notification IDs are defined in the FreeDesktop.Org Startup
 642  * Notifications standard, at
 643  * <ulink url="http://standards.freedesktop.org/startup-notification-spec/startup-notification-latest.txt"/>.
 644  *
 645  * Returns: a startup notification ID for the application, or %NULL if
 646  *     not supported.
 647  **/
 648 char *
 649 g_app_launch_context_get_startup_notify_id (GAppLaunchContext *context,
 650                                             GAppInfo          *info,
 651                                             GList             *files)
 652 {
 653   GAppLaunchContextClass *class;
 654
 655   g_return_val_if_fail (G_IS_APP_LAUNCH_CONTEXT (context), NULL);
 656   g_return_val_if_fail (G_IS_APP_INFO (info), NULL);
 657
 658   class = G_APP_LAUNCH_CONTEXT_GET_CLASS (context);
 659
 660   if (class->get_startup_notify_id == NULL)
 661     return NULL;
 662
 663   return class->get_startup_notify_id (context, info, files);
 664 }
 665
 666
 667 /**
 668  * g_app_launch_context_launch_failed:
 669  * @context: a #GAppLaunchContext.
 670  * @startup_notify_id: the startup notification id that was returned by g_app_launch_context_get_startup_notify_id().
 671  *
 672  * Called when an application has failed to launch, so that it can cancel
 673  * the application startup notification started in g_app_launch_context_get_startup_notify_id().
 674  *
 675  **/
 676 void
 677 g_app_launch_context_launch_failed (GAppLaunchContext *context,
 678                                     const char        *startup_notify_id)
 679 {
 680   GAppLaunchContextClass *class;
 681
 682   g_return_if_fail (G_IS_APP_LAUNCH_CONTEXT (context));
 683   g_return_if_fail (startup_notify_id != NULL);
 684
 685   class = G_APP_LAUNCH_CONTEXT_GET_CLASS (context);
 686
 687   if (class->launch_failed != NULL)
 688     class->launch_failed (context, startup_notify_id);
 689 }
 690
 691 #define __G_APP_INFO_C__
 692 #include "gioaliasdef.c"