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gnome-shell/src/shell-app.c
Ray Strode bf2ad9d4e8 app: Fix crash on search 
Not all desktop files tracked by the shell have
Exec lines.  This could be because they're actually
run by another process, for instance, and the desktop
file is merely there to provide metadata.  For example,
nautilus-pastebin provides a desktop file without an
Exec line.

The shell currently crashes if one of these partial
desktop files is installed and the user attempts to
search from the overview.

commit 37726a4cb6 fixed
a similar crasher.

This commit fixes the next one lower in the code.

https://bugzilla.gnome.org/show_bug.cgi?id=663815
2012-01-04 17:42:53 -05:00

1402 lines
39 KiB
C
Raw Blame History

/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include "config.h"
#include <string.h>
#include <glib/gi18n-lib.h>
#include <meta/display.h>
#include "shell-app-private.h"
#include "shell-enum-types.h"
#include "shell-global.h"
#include "shell-util.h"
#include "shell-app-system-private.h"
#include "shell-window-tracker-private.h"
#include "st.h"
typedef enum {
MATCH_NONE,
MATCH_SUBSTRING, /* Not prefix, substring */
MATCH_PREFIX, /* Strict prefix */
} ShellAppSearchMatch;
/* This is mainly a memory usage optimization - the user is going to
* be running far fewer of the applications at one time than they have
* installed. But it also just helps keep the code more logically
* separated.
*/
typedef struct {
guint refcount;
/* Last time the user interacted with any of this application's windows */
guint32 last_user_time;
/* Signal connection to dirty window sort list on workspace changes */
guint workspace_switch_id;
GSList *windows;
/* Whether or not we need to resort the windows; this is done on demand */
gboolean window_sort_stale : 1;
} ShellAppRunningState;
/**
* SECTION:shell-app
* @short_description: Object representing an application
*
* This object wraps a #GMenuTreeEntry, providing methods and signals
* primarily useful for running applications.
*/
struct _ShellApp
{
GObject parent;
int started_on_workspace;
ShellAppState state;
GMenuTreeEntry *entry; /* If NULL, this app is backed by one or more
* MetaWindow. For purposes of app title
* etc., we use the first window added,
* because it's most likely to be what we
* want (e.g. it will be of TYPE_NORMAL from
* the way shell-window-tracker.c works).
*/
ShellAppRunningState *running_state;
char *window_id_string;
char *casefolded_name;
char *name_collation_key;
char *casefolded_description;
char *casefolded_exec;
};
G_DEFINE_TYPE (ShellApp, shell_app, G_TYPE_OBJECT);
enum {
PROP_0,
PROP_STATE
};
enum {
WINDOWS_CHANGED,
LAST_SIGNAL
};
static guint shell_app_signals[LAST_SIGNAL] = { 0 };
static void create_running_state (ShellApp *app);
static void unref_running_state (ShellAppRunningState *state);
static void
shell_app_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ShellApp *app = SHELL_APP (gobject);
switch (prop_id)
{
case PROP_STATE:
g_value_set_enum (value, app->state);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
const char *
shell_app_get_id (ShellApp *app)
{
if (app->entry)
return gmenu_tree_entry_get_desktop_file_id (app->entry);
return app->window_id_string;
}
static MetaWindow *
window_backed_app_get_window (ShellApp *app)
{
g_assert (app->entry == NULL);
g_assert (app->running_state);
g_assert (app->running_state->windows);
return app->running_state->windows->data;
}
static ClutterActor *
window_backed_app_get_icon (ShellApp *app,
int size)
{
MetaWindow *window;
ClutterActor *actor;
/* During a state transition from running to not-running for
* window-backend apps, it's possible we get a request for the icon.
* Avoid asserting here and just return an empty image.
*/
if (app->running_state == NULL)
{
actor = clutter_texture_new ();
g_object_set (actor, "opacity", 0, "width", (float) size, "height", (float) size, NULL);
return actor;
}
window = window_backed_app_get_window (app);
actor = st_texture_cache_bind_pixbuf_property (st_texture_cache_get_default (),
G_OBJECT (window),
"icon");
g_object_set (actor, "width", (float) size, "height", (float) size, NULL);
return actor;
}
/**
* shell_app_create_icon_texture:
*
* Look up the icon for this application, and create a #ClutterTexture
* for it at the given size.
*
* Return value: (transfer none): A floating #ClutterActor
*/
ClutterActor *
shell_app_create_icon_texture (ShellApp *app,
int size)
{
GIcon *icon;
ClutterActor *ret;
ret = NULL;
if (app->entry == NULL)
return window_backed_app_get_icon (app, size);
icon = g_app_info_get_icon (G_APP_INFO (gmenu_tree_entry_get_app_info (app->entry)));
if (icon != NULL)
ret = st_texture_cache_load_gicon (st_texture_cache_get_default (), NULL, icon, size);
if (ret == NULL)
{
icon = g_themed_icon_new ("application-x-executable");
ret = st_texture_cache_load_gicon (st_texture_cache_get_default (), NULL, icon, size);
g_object_unref (icon);
}
return ret;
}
typedef struct {
ShellApp *app;
int size;
} CreateFadedIconData;
static CoglHandle
shell_app_create_faded_icon_cpu (StTextureCache *cache,
const char *key,
void *datap,
GError **error)
{
CreateFadedIconData *data = datap;
ShellApp *app;
GdkPixbuf *pixbuf;
int size;
CoglHandle texture;
gint width, height, rowstride;
guint8 n_channels;
gboolean have_alpha;
gint fade_start;
gint fade_range;
guint i, j;
guint pixbuf_byte_size;
guint8 *orig_pixels;
guint8 *pixels;
GIcon *icon;
GtkIconInfo *info;
app = data->app;
size = data->size;
info = NULL;
icon = g_app_info_get_icon (G_APP_INFO (gmenu_tree_entry_get_app_info (app->entry)));
if (icon != NULL)
{
info = gtk_icon_theme_lookup_by_gicon (gtk_icon_theme_get_default (),
icon, size,
GTK_ICON_LOOKUP_FORCE_SIZE);
}
if (info == NULL)
{
icon = g_themed_icon_new ("application-x-executable");
info = gtk_icon_theme_lookup_by_gicon (gtk_icon_theme_get_default (),
icon, size,
GTK_ICON_LOOKUP_FORCE_SIZE);
g_object_unref (icon);
}
if (info == NULL)
return COGL_INVALID_HANDLE;
pixbuf = gtk_icon_info_load_icon (info, NULL);
gtk_icon_info_free (info);
if (pixbuf == NULL)
return COGL_INVALID_HANDLE;
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
n_channels = gdk_pixbuf_get_n_channels (pixbuf);
orig_pixels = gdk_pixbuf_get_pixels (pixbuf);
have_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
pixbuf_byte_size = (height - 1) * rowstride +
+ width * ((n_channels * gdk_pixbuf_get_bits_per_sample (pixbuf) + 7) / 8);
pixels = g_malloc0 (rowstride * height);
memcpy (pixels, orig_pixels, pixbuf_byte_size);
fade_start = width / 2;
fade_range = width - fade_start;
for (i = fade_start; i < width; i++)
{
for (j = 0; j < height; j++)
{
guchar *pixel = &pixels[j * rowstride + i * n_channels];
float fade = 1.0 - ((float) i - fade_start) / fade_range;
pixel[0] = 0.5 + pixel[0] * fade;
pixel[1] = 0.5 + pixel[1] * fade;
pixel[2] = 0.5 + pixel[2] * fade;
if (have_alpha)
pixel[3] = 0.5 + pixel[3] * fade;
}
}
texture = cogl_texture_new_from_data (width,
height,
COGL_TEXTURE_NONE,
have_alpha ? COGL_PIXEL_FORMAT_RGBA_8888 : COGL_PIXEL_FORMAT_RGB_888,
COGL_PIXEL_FORMAT_ANY,
rowstride,
pixels);
g_free (pixels);
g_object_unref (pixbuf);
return texture;
}
/**
* shell_app_get_faded_icon:
* @app: A #ShellApp
* @size: Size in pixels
*
* Return an actor with a horizontally faded look.
*
* Return value: (transfer none): A floating #ClutterActor, or %NULL if no icon
*/
ClutterActor *
shell_app_get_faded_icon (ShellApp *app, int size)
{
CoglHandle texture;
ClutterActor *result;
char *cache_key;
CreateFadedIconData data;
/* Don't fade for window backed apps for now...easier to reuse the
* property tracking bits, and this helps us visually distinguish
* app-tracked from not.
*/
if (!app->entry)
return window_backed_app_get_icon (app, size);
cache_key = g_strdup_printf ("faded-icon:%s,size=%d", shell_app_get_id (app), size);
data.app = app;
data.size = size;
texture = st_texture_cache_load (st_texture_cache_get_default (),
cache_key,
ST_TEXTURE_CACHE_POLICY_FOREVER,
shell_app_create_faded_icon_cpu,
&data,
NULL);
g_free (cache_key);
if (texture != COGL_INVALID_HANDLE)
{
result = clutter_texture_new ();
clutter_texture_set_cogl_texture (CLUTTER_TEXTURE (result), texture);
}
else
{
result = clutter_texture_new ();
g_object_set (result, "opacity", 0, "width", (float) size, "height", (float) size, NULL);
}
return result;
}
const char *
shell_app_get_name (ShellApp *app)
{
if (app->entry)
return g_app_info_get_name (G_APP_INFO (gmenu_tree_entry_get_app_info (app->entry)));
else
{
MetaWindow *window = window_backed_app_get_window (app);
const char *name;
name = meta_window_get_wm_class (window);
if (!name)
name = _("Unknown");
return name;
}
}
const char *
shell_app_get_description (ShellApp *app)
{
if (app->entry)
return g_app_info_get_description (G_APP_INFO (gmenu_tree_entry_get_app_info (app->entry)));
else
return NULL;
}
/**
* shell_app_is_window_backed:
*
* A window backed application is one which represents just an open
* window, i.e. there's no .desktop file assocation, so we don't know
* how to launch it again.
*/
gboolean
shell_app_is_window_backed (ShellApp *app)
{
return app->entry == NULL;
}
typedef struct {
MetaWorkspace *workspace;
GSList **transients;
} CollectTransientsData;
static gboolean
collect_transients_on_workspace (MetaWindow *window,
gpointer datap)
{
CollectTransientsData *data = datap;
if (data->workspace && meta_window_get_workspace (window) != data->workspace)
return TRUE;
*data->transients = g_slist_prepend (*data->transients, window);
return TRUE;
}
/* The basic idea here is that when we're targeting a window,
* if it has transients we want to pick the most recent one
* the user interacted with.
* This function makes raising GEdit with the file chooser
* open work correctly.
*/
static MetaWindow *
find_most_recent_transient_on_same_workspace (MetaDisplay *display,
MetaWindow *reference)
{
GSList *transients, *transients_sorted, *iter;
MetaWindow *result;
CollectTransientsData data;
transients = NULL;
data.workspace = meta_window_get_workspace (reference);
data.transients = &transients;
meta_window_foreach_transient (reference, collect_transients_on_workspace, &data);
transients_sorted = meta_display_sort_windows_by_stacking (display, transients);
/* Reverse this so we're top-to-bottom (yes, we should probably change the order
* returned from the sort_windows_by_stacking function)
*/
transients_sorted = g_slist_reverse (transients_sorted);
g_slist_free (transients);
transients = NULL;
result = NULL;
for (iter = transients_sorted; iter; iter = iter->next)
{
MetaWindow *window = iter->data;
MetaWindowType wintype = meta_window_get_window_type (window);
/* Don't want to focus UTILITY types, like the Gimp toolbars */
if (wintype == META_WINDOW_NORMAL ||
wintype == META_WINDOW_DIALOG)
{
result = window;
break;
}
}
g_slist_free (transients_sorted);
return result;
}
/**
* shell_app_activate_window:
* @app: a #ShellApp
* @window: (allow-none): Window to be focused
* @timestamp: Event timestamp
*
* Bring all windows for the given app to the foreground,
* but ensure that @window is on top. If @window is %NULL,
* the window with the most recent user time for the app
* will be used.
*
* This function has no effect if @app is not currently running.
*/
void
shell_app_activate_window (ShellApp *app,
MetaWindow *window,
guint32 timestamp)
{
GSList *windows;
if (shell_app_get_state (app) != SHELL_APP_STATE_RUNNING)
return;
windows = shell_app_get_windows (app);
if (window == NULL && windows)
window = windows->data;
if (!g_slist_find (windows, window))
return;
else
{
GSList *iter;
ShellGlobal *global = shell_global_get ();
MetaScreen *screen = shell_global_get_screen (global);
MetaDisplay *display = meta_screen_get_display (screen);
MetaWorkspace *active = meta_screen_get_active_workspace (screen);
MetaWorkspace *workspace = meta_window_get_workspace (window);
guint32 last_user_timestamp = meta_display_get_last_user_time (display);
MetaWindow *most_recent_transient;
if (meta_display_xserver_time_is_before (display, timestamp, last_user_timestamp))
{
meta_window_set_demands_attention (window);
return;
}
/* Now raise all the other windows for the app that are on
* the same workspace, in reverse order to preserve the stacking.
*/
for (iter = windows; iter; iter = iter->next)
{
MetaWindow *other_window = iter->data;
if (other_window != window)
meta_window_raise (other_window);
}
/* If we have a transient that the user's interacted with more recently than
* the window, pick that.
*/
most_recent_transient = find_most_recent_transient_on_same_workspace (display, window);
if (most_recent_transient
&& meta_display_xserver_time_is_before (display,
meta_window_get_user_time (window),
meta_window_get_user_time (most_recent_transient)))
window = most_recent_transient;
if (!shell_window_tracker_is_window_interesting (window))
{
/* We won't get notify::user-time signals for uninteresting windows,
* which means that an app's last_user_time won't get updated.
* Update it here instead.
*/
app->running_state->last_user_time = timestamp;
}
if (active != workspace)
meta_workspace_activate_with_focus (workspace, window, timestamp);
else
meta_window_activate (window, timestamp);
}
}
/**
* shell_app_activate:
* @app: a #ShellApp
*
* Like shell_app_activate_full(), but using the default workspace and
* event timestamp.
*/
void
shell_app_activate (ShellApp *app)
{
return shell_app_activate_full (app, -1, 0);
}
/**
* shell_app_activate_full:
* @app: a #ShellApp
* @workspace: launch on this workspace, or -1 for default. Ignored if
* activating an existing window
* @timestamp: Event timestamp
*
* Perform an appropriate default action for operating on this application,
* dependent on its current state. For example, if the application is not
* currently running, launch it. If it is running, activate the most
* recently used NORMAL window (or if that window has a transient, the most
* recently used transient for that window).
*/
void
shell_app_activate_full (ShellApp *app,
int workspace,
guint32 timestamp)
{
ShellGlobal *global;
global = shell_global_get ();
if (timestamp == 0)
timestamp = shell_global_get_current_time (global);
switch (app->state)
{
case SHELL_APP_STATE_STOPPED:
{
GError *error = NULL;
if (!shell_app_launch (app,
timestamp,
NULL,
workspace,
NULL,
&error))
{
char *msg;
msg = g_strdup_printf (_("Failed to launch '%s'"), shell_app_get_name (app));
shell_global_notify_error (global,
msg,
error->message);
g_free (msg);
g_clear_error (&error);
}
}
break;
case SHELL_APP_STATE_STARTING:
break;
case SHELL_APP_STATE_RUNNING:
shell_app_activate_window (app, NULL, timestamp);
break;
}
}
/**
* shell_app_open_new_window:
* @app: a #ShellApp
* @workspace: open on this workspace, or -1 for default
*
* Request that the application create a new window.
*/
void
shell_app_open_new_window (ShellApp *app,
int workspace)
{
g_return_if_fail (app->entry != NULL);
/* Here we just always launch the application again, even if we know
* it was already running. For most applications this
* should have the effect of creating a new window, whether that's
* a second process (in the case of Calculator) or IPC to existing
* instance (Firefox). There are a few less-sensical cases such
* as say Pidgin. Ideally, we have the application express to us
* that it supports an explicit new-window action.
*/
shell_app_launch (app,
0,
NULL,
workspace,
NULL,
NULL);
}
/**
* shell_app_get_state:
* @app: a #ShellApp
*
* Returns: State of the application
*/
ShellAppState
shell_app_get_state (ShellApp *app)
{
return app->state;
}
typedef struct {
ShellApp *app;
MetaWorkspace *active_workspace;
} CompareWindowsData;
static int
shell_app_compare_windows (gconstpointer a,
gconstpointer b,
gpointer datap)
{
MetaWindow *win_a = (gpointer)a;
MetaWindow *win_b = (gpointer)b;
CompareWindowsData *data = datap;
gboolean ws_a, ws_b;
gboolean vis_a, vis_b;
ws_a = meta_window_get_workspace (win_a) == data->active_workspace;
ws_b = meta_window_get_workspace (win_b) == data->active_workspace;
if (ws_a && !ws_b)
return -1;
else if (!ws_a && ws_b)
return 1;
vis_a = meta_window_showing_on_its_workspace (win_a);
vis_b = meta_window_showing_on_its_workspace (win_b);
if (vis_a && !vis_b)
return -1;
else if (!vis_a && vis_b)
return 1;
return meta_window_get_user_time (win_b) - meta_window_get_user_time (win_a);
}
/**
* shell_app_get_windows:
* @app:
*
* Get the toplevel, interesting windows which are associated with this
* application. The returned list will be sorted first by whether
* they're on the active workspace, then by whether they're visible,
* and finally by the time the user last interacted with them.
*
* Returns: (transfer none) (element-type MetaWindow): List of windows
*/
GSList *
shell_app_get_windows (ShellApp *app)
{
if (app->running_state == NULL)
return NULL;
if (app->running_state->window_sort_stale)
{
CompareWindowsData data;
data.app = app;
data.active_workspace = meta_screen_get_active_workspace (shell_global_get_screen (shell_global_get ()));
app->running_state->windows = g_slist_sort_with_data (app->running_state->windows, shell_app_compare_windows, &data);
app->running_state->window_sort_stale = FALSE;
}
return app->running_state->windows;
}
guint
shell_app_get_n_windows (ShellApp *app)
{
if (app->running_state == NULL)
return 0;
return g_slist_length (app->running_state->windows);
}
static gboolean
shell_app_has_visible_windows (ShellApp *app)
{
GSList *iter;
if (app->running_state == NULL)
return FALSE;
for (iter = app->running_state->windows; iter; iter = iter->next)
{
MetaWindow *window = iter->data;
if (meta_window_showing_on_its_workspace (window))
return TRUE;
}
return FALSE;
}
gboolean
shell_app_is_on_workspace (ShellApp *app,
MetaWorkspace *workspace)
{
GSList *iter;
if (shell_app_get_state (app) == SHELL_APP_STATE_STARTING)
{
if (app->started_on_workspace == -1 ||
meta_workspace_index (workspace) == app->started_on_workspace)
return TRUE;
else
return FALSE;
}
if (app->running_state == NULL)
return FALSE;
for (iter = app->running_state->windows; iter; iter = iter->next)
{
if (meta_window_get_workspace (iter->data) == workspace)
return TRUE;
}
return FALSE;
}
/**
* shell_app_compare:
* @app:
* @other: A #ShellApp
*
* Compare one #ShellApp instance to another, in the following way:
* - Running applications sort before not-running applications.
* - If one of them has visible windows and the other does not, the one
* with visible windows is first.
* - Finally, the application which the user interacted with most recently
* compares earlier.
*/
int
shell_app_compare (ShellApp *app,
ShellApp *other)
{
gboolean vis_app, vis_other;
if (app->state != other->state)
{
if (app->state == SHELL_APP_STATE_RUNNING)
return -1;
return 1;
}
vis_app = shell_app_has_visible_windows (app);
vis_other = shell_app_has_visible_windows (other);
if (vis_app && !vis_other)
return -1;
else if (!vis_app && vis_other)
return 1;
if (app->state == SHELL_APP_STATE_RUNNING)
{
if (app->running_state->windows && !other->running_state->windows)
return -1;
else if (!app->running_state->windows && other->running_state->windows)
return 1;
return other->running_state->last_user_time - app->running_state->last_user_time;
}
return 0;
}
ShellApp *
_shell_app_new_for_window (MetaWindow *window)
{
ShellApp *app;
app = g_object_new (SHELL_TYPE_APP, NULL);
app->window_id_string = g_strdup_printf ("window:%d", meta_window_get_stable_sequence (window));
_shell_app_add_window (app, window);
return app;
}
ShellApp *
_shell_app_new (GMenuTreeEntry *info)
{
ShellApp *app;
app = g_object_new (SHELL_TYPE_APP, NULL);
_shell_app_set_entry (app, info);
return app;
}
void
_shell_app_set_entry (ShellApp *app,
GMenuTreeEntry *entry)
{
if (app->entry != NULL)
gmenu_tree_item_unref (app->entry);
app->entry = gmenu_tree_item_ref (entry);
if (app->name_collation_key != NULL)
g_free (app->name_collation_key);
app->name_collation_key = g_utf8_collate_key (shell_app_get_name (app), -1);
}
static void
shell_app_state_transition (ShellApp *app,
ShellAppState state)
{
if (app->state == state)
return;
g_return_if_fail (!(app->state == SHELL_APP_STATE_RUNNING &&
state == SHELL_APP_STATE_STARTING));
app->state = state;
if (app->state == SHELL_APP_STATE_STOPPED && app->running_state)
{
unref_running_state (app->running_state);
app->running_state = NULL;
}
_shell_app_system_notify_app_state_changed (shell_app_system_get_default (), app);
g_object_notify (G_OBJECT (app), "state");
}
static void
shell_app_on_unmanaged (MetaWindow *window,
ShellApp *app)
{
_shell_app_remove_window (app, window);
}
static void
shell_app_on_user_time_changed (MetaWindow *window,
GParamSpec *pspec,
ShellApp *app)
{
g_assert (app->running_state != NULL);
app->running_state->last_user_time = meta_window_get_user_time (window);
/* Ideally we don't want to emit windows-changed if the sort order
* isn't actually changing. This check catches most of those.
*/
if (window != app->running_state->windows->data)
{
app->running_state->window_sort_stale = TRUE;
g_signal_emit (app, shell_app_signals[WINDOWS_CHANGED], 0);
}
}
static void
shell_app_on_ws_switch (MetaScreen *screen,
int from,
int to,
MetaMotionDirection direction,
gpointer data)
{
ShellApp *app = SHELL_APP (data);
g_assert (app->running_state != NULL);
app->running_state->window_sort_stale = TRUE;
g_signal_emit (app, shell_app_signals[WINDOWS_CHANGED], 0);
}
void
_shell_app_add_window (ShellApp *app,
MetaWindow *window)
{
guint32 user_time;
if (app->running_state && g_slist_find (app->running_state->windows, window))
return;
g_object_freeze_notify (G_OBJECT (app));
if (!app->running_state)
create_running_state (app);
app->running_state->window_sort_stale = TRUE;
app->running_state->windows = g_slist_prepend (app->running_state->windows, g_object_ref (window));
g_signal_connect (window, "unmanaged", G_CALLBACK(shell_app_on_unmanaged), app);
g_signal_connect (window, "notify::user-time", G_CALLBACK(shell_app_on_user_time_changed), app);
user_time = meta_window_get_user_time (window);
if (user_time > app->running_state->last_user_time)
app->running_state->last_user_time = user_time;
if (app->state != SHELL_APP_STATE_STARTING)
shell_app_state_transition (app, SHELL_APP_STATE_RUNNING);
g_object_thaw_notify (G_OBJECT (app));
g_signal_emit (app, shell_app_signals[WINDOWS_CHANGED], 0);
}
void
_shell_app_remove_window (ShellApp *app,
MetaWindow *window)
{
g_assert (app->running_state != NULL);
if (!g_slist_find (app->running_state->windows, window))
return;
g_signal_handlers_disconnect_by_func (window, G_CALLBACK(shell_app_on_unmanaged), app);
g_signal_handlers_disconnect_by_func (window, G_CALLBACK(shell_app_on_user_time_changed), app);
g_object_unref (window);
app->running_state->windows = g_slist_remove (app->running_state->windows, window);
if (app->running_state->windows == NULL)
shell_app_state_transition (app, SHELL_APP_STATE_STOPPED);
g_signal_emit (app, shell_app_signals[WINDOWS_CHANGED], 0);
}
/**
* shell_app_get_pids:
* @app: a #ShellApp
*
* Returns: (transfer container) (element-type int): An unordered list of process identifers associated with this application.
*/
GSList *
shell_app_get_pids (ShellApp *app)
{
GSList *result;
GSList *iter;
result = NULL;
for (iter = shell_app_get_windows (app); iter; iter = iter->next)
{
MetaWindow *window = iter->data;
int pid = meta_window_get_pid (window);
/* Note in the (by far) common case, app will only have one pid, so
* we'll hit the first element, so don't worry about O(N^2) here.
*/
if (!g_slist_find (result, GINT_TO_POINTER (pid)))
result = g_slist_prepend (result, GINT_TO_POINTER (pid));
}
return result;
}
void
_shell_app_handle_startup_sequence (ShellApp *app,
SnStartupSequence *sequence)
{
gboolean starting = !sn_startup_sequence_get_completed (sequence);
/* The Shell design calls for on application launch, the app title
* appears at top, and no X window is focused. So when we get
* a startup-notification for this app, transition it to STARTING
* if it's currently stopped, set it as our application focus,
* but focus the no_focus window.
*/
if (starting && shell_app_get_state (app) == SHELL_APP_STATE_STOPPED)
{
MetaScreen *screen = shell_global_get_screen (shell_global_get ());
MetaDisplay *display = meta_screen_get_display (screen);
shell_app_state_transition (app, SHELL_APP_STATE_STARTING);
meta_display_focus_the_no_focus_window (display, screen,
sn_startup_sequence_get_timestamp (sequence));
app->started_on_workspace = sn_startup_sequence_get_workspace (sequence);
}
if (!starting)
{
if (app->running_state && app->running_state->windows)
shell_app_state_transition (app, SHELL_APP_STATE_RUNNING);
else /* application have > 1 .desktop file */
shell_app_state_transition (app, SHELL_APP_STATE_STOPPED);
}
}
/**
* shell_app_request_quit:
* @app: A #ShellApp
*
* Initiate an asynchronous request to quit this application.
* The application may interact with the user, and the user
* might cancel the quit request from the application UI.
*
* This operation may not be supported for all applications.
*
* Returns: %TRUE if a quit request is supported for this application
*/
gboolean
shell_app_request_quit (ShellApp *app)
{
GSList *iter;
if (shell_app_get_state (app) != SHELL_APP_STATE_RUNNING)
return FALSE;
/* TODO - check for an XSMP connection; we could probably use that */
for (iter = app->running_state->windows; iter; iter = iter->next)
{
MetaWindow *win = iter->data;
if (!shell_window_tracker_is_window_interesting (win))
continue;
meta_window_delete (win, shell_global_get_current_time (shell_global_get ()));
}
return TRUE;
}
static void
_gather_pid_callback (GDesktopAppInfo *gapp,
GPid pid,
gpointer data)
{
ShellApp *app;
ShellWindowTracker *tracker;
g_return_if_fail (data != NULL);
app = SHELL_APP (data);
tracker = shell_window_tracker_get_default ();
_shell_window_tracker_add_child_process_app (tracker,
pid,
app);
}
/**
* shell_app_launch:
* @timestamp: Event timestamp, or 0 for current event timestamp
* @uris: (element-type utf8): List of uris to pass to application
* @workspace: Start on this workspace, or -1 for default
* @startup_id: (out): Returned startup notification ID, or %NULL if none
* @error: A #GError
*/
gboolean
shell_app_launch (ShellApp *app,
guint timestamp,
GList *uris,
int workspace,
char **startup_id,
GError **error)
{
GDesktopAppInfo *gapp;
GdkAppLaunchContext *context;
gboolean ret;
ShellGlobal *global;
MetaScreen *screen;
if (startup_id)
*startup_id = NULL;
if (app->entry == NULL)
{
MetaWindow *window = window_backed_app_get_window (app);
/* We can't pass URIs into a window; shouldn't hit this
* code path. If we do, fix the caller to disallow it.
*/
g_return_val_if_fail (uris == NULL, TRUE);
meta_window_activate (window, timestamp);
return TRUE;
}
global = shell_global_get ();
screen = shell_global_get_screen (global);
if (timestamp == 0)
timestamp = shell_global_get_current_time (global);
if (workspace < 0)
workspace = meta_screen_get_active_workspace_index (screen);
context = gdk_app_launch_context_new ();
gdk_app_launch_context_set_timestamp (context, timestamp);
gdk_app_launch_context_set_desktop (context, workspace);
gapp = gmenu_tree_entry_get_app_info (app->entry);
ret = g_desktop_app_info_launch_uris_as_manager (gapp, uris,
G_APP_LAUNCH_CONTEXT (context),
G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD,
NULL, NULL,
_gather_pid_callback, app,
error);
g_object_unref (context);
return ret;
}
/**
* shell_app_get_app_info:
* @app: a #ShellApp
*
* Returns: (transfer none): The #GDesktopAppInfo for this app, or %NULL if backed by a window
*/
GDesktopAppInfo *
shell_app_get_app_info (ShellApp *app)
{
if (app->entry)
return gmenu_tree_entry_get_app_info (app->entry);
return NULL;
}
/**
* shell_app_get_tree_entry:
* @app: a #ShellApp
*
* Returns: (transfer none): The #GMenuTreeEntry for this app, or %NULL if backed by a window
*/
GMenuTreeEntry *
shell_app_get_tree_entry (ShellApp *app)
{
return app->entry;
}
static void
create_running_state (ShellApp *app)
{
MetaScreen *screen;
g_assert (app->running_state == NULL);
screen = shell_global_get_screen (shell_global_get ());
app->running_state = g_slice_new0 (ShellAppRunningState);
app->running_state->refcount = 1;
app->running_state->workspace_switch_id =
g_signal_connect (screen, "workspace-switched", G_CALLBACK(shell_app_on_ws_switch), app);
}
static void
unref_running_state (ShellAppRunningState *state)
{
MetaScreen *screen;
state->refcount--;
if (state->refcount > 0)
return;
screen = shell_global_get_screen (shell_global_get ());
g_signal_handler_disconnect (screen, state->workspace_switch_id);
g_slice_free (ShellAppRunningState, state);
}
static char *
trim_exec_line (const char *str)
{
const char *start, *end, *pos;
if (str == NULL)
return NULL;
end = strchr (str, ' ');
if (end == NULL)
end = str + strlen (str);
start = str;
while ((pos = strchr (start, '/')) && pos < end)
start = ++pos;
return g_strndup (start, end - start);
}
static void
shell_app_init_search_data (ShellApp *app)
{
const char *name;
const char *exec;
const char *comment;
char *normalized_exec;
GDesktopAppInfo *appinfo;
appinfo = gmenu_tree_entry_get_app_info (app->entry);
name = g_app_info_get_name (G_APP_INFO (appinfo));
app->casefolded_name = shell_util_normalize_and_casefold (name);
comment = g_app_info_get_description (G_APP_INFO (appinfo));
app->casefolded_description = shell_util_normalize_and_casefold (comment);
exec = g_app_info_get_executable (G_APP_INFO (appinfo));
normalized_exec = shell_util_normalize_and_casefold (exec);
app->casefolded_exec = trim_exec_line (normalized_exec);
g_free (normalized_exec);
}
/**
* shell_app_compare_by_name:
* @app:
* @other:
*
* Order two applications by name.
*
* Returns: -1, 0, or 1; suitable for use as a comparison function for e.g. g_slist_sort()
*/
int
shell_app_compare_by_name (ShellApp *app, ShellApp *other)
{
return strcmp (app->name_collation_key, other->name_collation_key);
}
static ShellAppSearchMatch
_shell_app_match_search_terms (ShellApp *app,
GSList *terms)
{
GSList *iter;
ShellAppSearchMatch match;
if (G_UNLIKELY (!app->casefolded_name))
shell_app_init_search_data (app);
match = MATCH_NONE;
for (iter = terms; iter; iter = iter->next)
{
ShellAppSearchMatch current_match;
const char *term = iter->data;
const char *p;
current_match = MATCH_NONE;
p = strstr (app->casefolded_name, term);
if (p != NULL)
{
if (p == app->casefolded_name || *(p - 1) == ' ')
current_match = MATCH_PREFIX;
else
current_match = MATCH_SUBSTRING;
}
if (app->casefolded_exec)
{
p = strstr (app->casefolded_exec, term);
if (p != NULL)
{
if (p == app->casefolded_exec || *(p - 1) == '-')
current_match = MATCH_PREFIX;
else if (current_match < MATCH_PREFIX)
current_match = MATCH_SUBSTRING;
}
}
if (app->casefolded_description && current_match < MATCH_PREFIX)
{
/* Only do substring matches, as prefix matches are not meaningful
* enough for descriptions
*/
p = strstr (app->casefolded_description, term);
if (p != NULL)
current_match = MATCH_SUBSTRING;
}
if (current_match == MATCH_NONE)
return current_match;
if (current_match > match)
match = current_match;
}
return match;
}
void
_shell_app_do_match (ShellApp *app,
GSList *terms,
GSList **prefix_results,
GSList **substring_results)
{
ShellAppSearchMatch match;
GAppInfo *appinfo;
g_assert (app != NULL);
/* Skip window-backed apps */
appinfo = (GAppInfo*)shell_app_get_app_info (app);
if (appinfo == NULL)
return;
/* Skip not-visible apps */
if (!g_app_info_should_show (appinfo))
return;
match = _shell_app_match_search_terms (app, terms);
switch (match)
{
case MATCH_NONE:
break;
case MATCH_PREFIX:
*prefix_results = g_slist_prepend (*prefix_results, app);
break;
case MATCH_SUBSTRING:
*substring_results = g_slist_prepend (*substring_results, app);
break;
}
}
static void
shell_app_init (ShellApp *self)
{
self->state = SHELL_APP_STATE_STOPPED;
}
static void
shell_app_dispose (GObject *object)
{
ShellApp *app = SHELL_APP (object);
if (app->entry)
{
gmenu_tree_item_unref (app->entry);
app->entry = NULL;
}
if (app->running_state)
{
while (app->running_state->windows)
_shell_app_remove_window (app, app->running_state->windows->data);
}
G_OBJECT_CLASS(shell_app_parent_class)->dispose (object);
}
static void
shell_app_finalize (GObject *object)
{
ShellApp *app = SHELL_APP (object);
g_free (app->window_id_string);
g_free (app->casefolded_name);
g_free (app->name_collation_key);
g_free (app->casefolded_description);
g_free (app->casefolded_exec);
G_OBJECT_CLASS(shell_app_parent_class)->finalize (object);
}
static void
shell_app_class_init(ShellAppClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->get_property = shell_app_get_property;
gobject_class->dispose = shell_app_dispose;
gobject_class->finalize = shell_app_finalize;
shell_app_signals[WINDOWS_CHANGED] = g_signal_new ("windows-changed",
SHELL_TYPE_APP,
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ShellApp:state:
*
* The high-level state of the application, effectively whether it's
* running or not, or transitioning between those states.
*/
g_object_class_install_property (gobject_class,
PROP_STATE,
g_param_spec_enum ("state",
"State",
"Application state",
SHELL_TYPE_APP_STATE,
SHELL_APP_STATE_STOPPED,
G_PARAM_READABLE));
}
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