mirror of
https://github.com/elementary/gala.git
synced 2024-12-01 03:34:04 +03:00
337 lines
9.6 KiB
Vala
337 lines
9.6 KiB
Vala
//
|
|
// Copyright (C) 2012 Tom Beckmann, Rico Tzschichholz
|
|
//
|
|
// 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 3 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/>.
|
|
//
|
|
|
|
namespace Gala
|
|
{
|
|
public class Utils
|
|
{
|
|
// Cache xid:pixbuf and icon:pixbuf pairs to provide a faster way aquiring icons
|
|
static HashTable<string, Gdk.Pixbuf> xid_pixbuf_cache;
|
|
static HashTable<string, Gdk.Pixbuf> icon_pixbuf_cache;
|
|
static uint cache_clear_timeout = 0;
|
|
|
|
static Gdk.Pixbuf? close_pixbuf = null;
|
|
|
|
static construct
|
|
{
|
|
xid_pixbuf_cache = new HashTable<string, Gdk.Pixbuf> (str_hash, str_equal);
|
|
icon_pixbuf_cache = new HashTable<string, Gdk.Pixbuf> (str_hash, str_equal);
|
|
}
|
|
|
|
Utils ()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Clean icon caches
|
|
*/
|
|
static void clean_icon_cache (uint32[] xids)
|
|
{
|
|
var list = xid_pixbuf_cache.get_keys ();
|
|
var pixbuf_list = icon_pixbuf_cache.get_values ();
|
|
var icon_list = icon_pixbuf_cache.get_keys ();
|
|
|
|
foreach (var xid_key in list) {
|
|
var xid = (uint32)uint64.parse (xid_key.split ("::")[0]);
|
|
if (!(xid in xids)) {
|
|
var pixbuf = xid_pixbuf_cache.get (xid_key);
|
|
for (var j = 0; j < pixbuf_list.length (); j++) {
|
|
if (pixbuf_list.nth_data (j) == pixbuf) {
|
|
xid_pixbuf_cache.remove (icon_list.nth_data (j));
|
|
}
|
|
}
|
|
|
|
xid_pixbuf_cache.remove (xid_key);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Marks the given xids as no longer needed, the corresponding icons
|
|
* may be freed now. Mainly for internal purposes.
|
|
*
|
|
* @param xids The xids of the window that no longer need icons
|
|
*/
|
|
public static void request_clean_icon_cache (uint32[] xids)
|
|
{
|
|
if (cache_clear_timeout > 0)
|
|
GLib.Source.remove (cache_clear_timeout);
|
|
|
|
cache_clear_timeout = Timeout.add_seconds (30, () => {
|
|
cache_clear_timeout = 0;
|
|
Idle.add (() => {
|
|
clean_icon_cache (xids);
|
|
return false;
|
|
});
|
|
return false;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Returns a pixbuf for the application of this window or a default icon
|
|
*
|
|
* @param window The window to get an icon for
|
|
* @param size The size of the icon
|
|
* @param ignore_cache Should not be necessary in most cases, if you care about the icon
|
|
* being loaded correctly, you should consider using the WindowIcon class
|
|
*/
|
|
public static Gdk.Pixbuf get_icon_for_window (Meta.Window window, int size, bool ignore_cache = false)
|
|
{
|
|
return get_icon_for_xid ((uint32)window.get_xwindow (), size, ignore_cache);
|
|
}
|
|
|
|
/**
|
|
* Returns a pixbuf for a given xid or a default icon
|
|
*
|
|
* @see get_icon_for_window
|
|
*/
|
|
public static Gdk.Pixbuf get_icon_for_xid (uint32 xid, int size, bool ignore_cache = false)
|
|
{
|
|
Gdk.Pixbuf? result = null;
|
|
var xid_key = "%u::%i".printf (xid, size);
|
|
|
|
if (!ignore_cache && (result = xid_pixbuf_cache.get (xid_key)) != null)
|
|
return result;
|
|
|
|
var app = Bamf.Matcher.get_default ().get_application_for_xid (xid);
|
|
result = get_icon_for_application (app, size, ignore_cache);
|
|
|
|
xid_pixbuf_cache.set (xid_key, result);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Returns a pixbuf for this application or a default icon
|
|
*
|
|
* @see get_icon_for_window
|
|
*/
|
|
static Gdk.Pixbuf get_icon_for_application (Bamf.Application? app, int size,
|
|
bool ignore_cache = false)
|
|
{
|
|
Gdk.Pixbuf? image = null;
|
|
bool not_cached = false;
|
|
|
|
string? icon = null;
|
|
string? icon_key = null;
|
|
|
|
if (app != null && app.get_desktop_file () != null) {
|
|
var appinfo = new DesktopAppInfo.from_filename (app.get_desktop_file ());
|
|
if (appinfo != null) {
|
|
#if HAVE_PLANK_0_11
|
|
icon = Plank.DrawingService.get_icon_from_gicon (appinfo.get_icon ());
|
|
#else
|
|
icon = Plank.Drawing.DrawingService.get_icon_from_gicon (appinfo.get_icon ());
|
|
#endif
|
|
icon_key = "%s::%i".printf (icon, size);
|
|
if (ignore_cache || (image = icon_pixbuf_cache.get (icon_key)) == null) {
|
|
#if HAVE_PLANK_0_11
|
|
image = Plank.DrawingService.load_icon (icon, size, size);
|
|
#else
|
|
image = Plank.Drawing.DrawingService.load_icon (icon, size, size);
|
|
#endif
|
|
not_cached = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (image == null) {
|
|
try {
|
|
unowned Gtk.IconTheme icon_theme = Gtk.IconTheme.get_default ();
|
|
icon = "application-default-icon";
|
|
icon_key = "%s::%i".printf (icon, size);
|
|
if ((image = icon_pixbuf_cache.get (icon_key)) == null) {
|
|
image = icon_theme.load_icon (icon, size, 0);
|
|
not_cached = true;
|
|
}
|
|
} catch (Error e) {
|
|
warning (e.message);
|
|
}
|
|
}
|
|
|
|
if (image == null) {
|
|
icon = "";
|
|
icon_key = "::%i".printf (size);
|
|
if ((image = icon_pixbuf_cache.get (icon_key)) == null) {
|
|
image = new Gdk.Pixbuf (Gdk.Colorspace.RGB, true, 8, size, size);
|
|
image.fill (0x00000000);
|
|
not_cached = true;
|
|
}
|
|
}
|
|
|
|
if (size != image.width || size != image.height)
|
|
#if HAVE_PLANK_0_11
|
|
image = Plank.DrawingService.ar_scale (image, size, size);
|
|
#else
|
|
image = Plank.Drawing.DrawingService.ar_scale (image, size, size);
|
|
#endif
|
|
|
|
if (not_cached)
|
|
icon_pixbuf_cache.set (icon_key, image);
|
|
|
|
return image;
|
|
}
|
|
|
|
/**
|
|
* Get the next window that should be active on a workspace right now. Based on
|
|
* stacking order
|
|
*
|
|
* @param workspace The workspace on which to find the window
|
|
* @param backward Whether to get the previous one instead
|
|
*/
|
|
public static Meta.Window get_next_window (Meta.Workspace workspace, bool backward = false)
|
|
{
|
|
var screen = workspace.get_screen ();
|
|
var display = screen.get_display ();
|
|
|
|
var window = display.get_tab_next (Meta.TabList.NORMAL,
|
|
workspace, null, backward);
|
|
|
|
if (window == null)
|
|
window = display.get_tab_current (Meta.TabList.NORMAL, workspace);
|
|
|
|
return window;
|
|
}
|
|
|
|
/**
|
|
* Get the number of toplevel windows on a workspace excluding those that are
|
|
* on all workspaces
|
|
*
|
|
* @param workspace The workspace on which to count the windows
|
|
*/
|
|
public static uint get_n_windows (Meta.Workspace workspace)
|
|
{
|
|
var n = 0;
|
|
foreach (var window in workspace.list_windows ()) {
|
|
if (window.is_on_all_workspaces ())
|
|
continue;
|
|
if (window.window_type == Meta.WindowType.NORMAL ||
|
|
window.window_type == Meta.WindowType.DIALOG ||
|
|
window.window_type == Meta.WindowType.MODAL_DIALOG)
|
|
n ++;
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
/**
|
|
* Creates an actor showing the current contents of the given WindowActor.
|
|
*
|
|
* @param actor The actor from which to create a shnapshot
|
|
* @param inner_rect The inner (actually visible) rectangle of the window
|
|
* @param outer_rect The outer (input region) rectangle of the window
|
|
*
|
|
* @return A copy of the actor at that time or %NULL
|
|
*/
|
|
public static Clutter.Actor? get_window_actor_snapshot (Meta.WindowActor actor, Meta.Rectangle inner_rect, Meta.Rectangle outer_rect)
|
|
{
|
|
var texture = actor.get_texture () as Meta.ShapedTexture;
|
|
|
|
if (texture == null)
|
|
return null;
|
|
|
|
var surface = texture.get_image ({
|
|
inner_rect.x - outer_rect.x,
|
|
inner_rect.y - outer_rect.y,
|
|
inner_rect.width,
|
|
inner_rect.height
|
|
});
|
|
|
|
if (surface == null)
|
|
return null;
|
|
|
|
var canvas = new Clutter.Canvas ();
|
|
var handler = canvas.draw.connect ((cr) => {
|
|
cr.set_source_surface (surface, 0, 0);
|
|
cr.paint ();
|
|
return false;
|
|
});
|
|
canvas.set_size (inner_rect.width, inner_rect.height);
|
|
SignalHandler.disconnect (canvas, handler);
|
|
|
|
var container = new Clutter.Actor ();
|
|
container.set_size (inner_rect.width, inner_rect.height);
|
|
container.content = canvas;
|
|
|
|
return container;
|
|
}
|
|
|
|
/**
|
|
* Ring the system bell, will most likely emit a <beep> error sound or, if the
|
|
* audible bell is disabled, flash the screen
|
|
*
|
|
* @param screen The screen to flash, if necessary
|
|
*/
|
|
public static void bell (Meta.Screen screen)
|
|
{
|
|
if (Meta.Prefs.bell_is_audible ())
|
|
Gdk.beep ();
|
|
else
|
|
screen.get_display ().get_compositor ().flash_screen (screen);
|
|
}
|
|
|
|
/**
|
|
* Returns the pixbuf that is used for close buttons throughout gala at a
|
|
* size of 36px
|
|
*
|
|
* @return the close button pixbuf or null if it failed to load
|
|
*/
|
|
public static Gdk.Pixbuf? get_close_button_pixbuf ()
|
|
{
|
|
if (close_pixbuf == null) {
|
|
try {
|
|
close_pixbuf = new Gdk.Pixbuf.from_file_at_scale (Config.PKGDATADIR + "/close.svg", -1, 36, true);
|
|
} catch (Error e) {
|
|
warning (e.message);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
return close_pixbuf;
|
|
}
|
|
|
|
/**
|
|
* Creates a new reactive ClutterActor at 36px with the close pixbuf
|
|
*
|
|
* @return The close button actor
|
|
*/
|
|
public static Clutter.Actor create_close_button ()
|
|
{
|
|
var texture = new Clutter.Texture ();
|
|
var pixbuf = get_close_button_pixbuf ();
|
|
|
|
texture.reactive = true;
|
|
|
|
if (pixbuf != null) {
|
|
try {
|
|
texture.set_from_rgb_data (pixbuf.get_pixels (), pixbuf.get_has_alpha (),
|
|
pixbuf.get_width (), pixbuf.get_height (),
|
|
pixbuf.get_rowstride (), (pixbuf.get_has_alpha () ? 4 : 3), 0);
|
|
} catch (Error e) {}
|
|
} else {
|
|
// we'll just make this red so there's at least something as an
|
|
// indicator that loading failed. Should never happen and this
|
|
// works as good as some weird fallback-image-failed-to-load pixbuf
|
|
texture.set_size (36, 36);
|
|
texture.background_color = { 255, 0, 0, 255 };
|
|
}
|
|
|
|
return texture;
|
|
}
|
|
}
|
|
}
|