mirror of
https://github.com/elementary/gala.git
synced 2024-12-19 15:21:47 +03:00
444 lines
17 KiB
Vala
444 lines
17 KiB
Vala
//
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// Copyright (C) 2012 Tom Beckmann, Rico Tzschichholz
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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namespace Gala {
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public class Utils {
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private struct CachedIcon {
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public Gdk.Pixbuf icon;
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public int icon_size;
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public int scale;
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}
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private static Gdk.Pixbuf? resize_pixbuf = null;
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private static Gdk.Pixbuf? close_pixbuf = null;
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private static Gee.HashMultiMap<DesktopAppInfo, CachedIcon?> icon_cache;
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private static Gee.HashMap<Meta.Window, DesktopAppInfo> window_to_desktop_cache;
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private static Gee.ArrayList<CachedIcon?> unknown_icon_cache;
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private static AppCache app_cache;
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static construct {
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icon_cache = new Gee.HashMultiMap<DesktopAppInfo, CachedIcon?> ();
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window_to_desktop_cache = new Gee.HashMap<Meta.Window, DesktopAppInfo> ();
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unknown_icon_cache = new Gee.ArrayList<CachedIcon?> ();
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app_cache = new AppCache ();
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app_cache.changed.connect (() => {
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icon_cache.clear ();
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window_to_desktop_cache.clear ();
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});
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}
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public static Gdk.Pixbuf get_icon_for_window (Meta.Window window, int icon_size, int scale) {
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var transient_for = window.get_transient_for ();
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if (transient_for != null) {
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return get_icon_for_window (transient_for, icon_size, scale);
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}
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GLib.DesktopAppInfo? desktop_app = null;
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desktop_app = window_to_desktop_cache[window];
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if (desktop_app != null) {
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var icon = get_icon_for_desktop_app_info (desktop_app, icon_size, scale);
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if (icon != null) {
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return icon;
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}
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}
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var sandbox_id = window.get_sandboxed_app_id ();
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var wm_instance = window.get_wm_class_instance ();
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desktop_app = app_cache.lookup_startup_wmclass (wm_instance);
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if (desktop_app != null && check_app_prefix (desktop_app, sandbox_id)) {
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var icon = get_icon_for_desktop_app_info (desktop_app, icon_size, scale);
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if (icon != null) {
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window_to_desktop_cache[window] = desktop_app;
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return icon;
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}
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}
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var wm_class = window.get_wm_class ();
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desktop_app = app_cache.lookup_startup_wmclass (wm_class);
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if (desktop_app != null && check_app_prefix (desktop_app, sandbox_id)) {
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var icon = get_icon_for_desktop_app_info (desktop_app, icon_size, scale);
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if (icon != null) {
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window_to_desktop_cache[window] = desktop_app;
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return icon;
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}
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}
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desktop_app = lookup_desktop_wmclass (wm_instance);
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if (desktop_app != null && check_app_prefix (desktop_app, sandbox_id)) {
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var icon = get_icon_for_desktop_app_info (desktop_app, icon_size, scale);
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if (icon != null) {
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window_to_desktop_cache[window] = desktop_app;
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return icon;
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}
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}
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desktop_app = lookup_desktop_wmclass (wm_class);
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if (desktop_app != null && check_app_prefix (desktop_app, sandbox_id)) {
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var icon = get_icon_for_desktop_app_info (desktop_app, icon_size, scale);
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if (icon != null) {
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window_to_desktop_cache[window] = desktop_app;
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return icon;
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}
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}
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desktop_app = get_app_from_id (sandbox_id);
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if (desktop_app != null) {
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var icon = get_icon_for_desktop_app_info (desktop_app, icon_size, scale);
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if (icon != null) {
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window_to_desktop_cache[window] = desktop_app;
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return icon;
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}
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}
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var gapplication_id = window.get_gtk_application_id ();
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desktop_app = get_app_from_id (gapplication_id);
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if (desktop_app != null) {
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var icon = get_icon_for_desktop_app_info (desktop_app, icon_size, scale);
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if (icon != null) {
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window_to_desktop_cache[window] = desktop_app;
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return icon;
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}
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}
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unowned Meta.Group group = window.get_group ();
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if (group != null) {
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var group_windows = group.list_windows ();
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group_windows.foreach ((window) => {
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if (window.get_window_type () != Meta.WindowType.NORMAL) {
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return;
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}
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if (window_to_desktop_cache[window] != null) {
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desktop_app = window_to_desktop_cache[window];
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}
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});
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if (desktop_app != null) {
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var icon = get_icon_for_desktop_app_info (desktop_app, icon_size, scale);
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if (icon != null) {
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window_to_desktop_cache[window] = desktop_app;
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return icon;
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}
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}
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}
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// Haven't been able to get an icon for the window at this point, look to see
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// if we've already cached "application-default-icon" at this size
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foreach (var icon in unknown_icon_cache) {
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if (icon.icon_size == icon_size && icon.scale == scale) {
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return icon.icon;
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}
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}
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// Construct a new "application-default-icon" and store it in the cache
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try {
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var icon = Gtk.IconTheme.get_default ().load_icon_for_scale ("application-default-icon", icon_size, scale, 0);
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unknown_icon_cache.add (CachedIcon () { icon = icon, icon_size = icon_size, scale = scale });
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return icon;
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} catch (Error e) {
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var icon = new Gdk.Pixbuf (Gdk.Colorspace.RGB, true, 8, icon_size * scale, icon_size * scale);
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icon.fill (0x00000000);
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return icon;
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}
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}
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private static bool check_app_prefix (GLib.DesktopAppInfo app, string? sandbox_id) {
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if (sandbox_id == null) {
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return true;
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}
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var prefix = "%s.".printf (sandbox_id);
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if (app.get_id ().has_prefix (prefix)) {
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return true;
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}
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return false;
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}
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public static void clear_window_cache (Meta.Window window) {
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var desktop = window_to_desktop_cache[window];
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if (desktop != null) {
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icon_cache.remove_all (desktop);
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window_to_desktop_cache.unset (window);
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}
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}
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private static GLib.DesktopAppInfo? get_app_from_id (string? id) {
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if (id == null) {
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return null;
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}
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var desktop_file = "%s.desktop".printf (id);
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return app_cache.lookup_id (desktop_file);
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}
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private static GLib.DesktopAppInfo? lookup_desktop_wmclass (string? wm_class) {
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if (wm_class == null) {
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return null;
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}
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var desktop_info = get_app_from_id (wm_class);
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if (desktop_info != null) {
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return desktop_info;
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}
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var canonicalized = wm_class.ascii_down ().delimit (" ", '-');
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return get_app_from_id (canonicalized);
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}
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private static Gdk.Pixbuf? get_icon_for_desktop_app_info (GLib.DesktopAppInfo desktop, int icon_size, int scale) {
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if (icon_cache.contains (desktop)) {
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foreach (var icon in icon_cache[desktop]) {
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if (icon.icon_size == icon_size && icon.scale == scale) {
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return icon.icon;
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}
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}
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}
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var icon = desktop.get_icon ();
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if (icon is GLib.ThemedIcon) {
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var icon_names = ((GLib.ThemedIcon)icon).get_names ();
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var icon_info = Gtk.IconTheme.get_default ().choose_icon_for_scale (icon_names, icon_size, scale, 0);
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if (icon_info == null) {
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return null;
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}
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try {
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var pixbuf = icon_info.load_icon ();
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icon_cache.@set (desktop, CachedIcon () { icon = pixbuf, icon_size = icon_size, scale = scale });
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return pixbuf;
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} catch (Error e) {
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return null;
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}
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} else if (icon is GLib.FileIcon) {
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var file = ((GLib.FileIcon)icon).file;
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var size_with_scale = icon_size * scale;
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try {
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var pixbuf = new Gdk.Pixbuf.from_stream_at_scale (file.read (), size_with_scale, size_with_scale, true);
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icon_cache.@set (desktop, CachedIcon () { icon = pixbuf, icon_size = icon_size, scale = scale });
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return pixbuf;
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} catch (Error e) {
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return null;
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}
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}
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return null;
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}
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/**
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* Get the number of toplevel windows on a workspace excluding those that are
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* on all workspaces
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*
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* @param workspace The workspace on which to count the windows
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*/
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public static uint get_n_windows (Meta.Workspace workspace) {
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var n = 0;
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foreach (weak Meta.Window window in workspace.list_windows ()) {
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if (window.on_all_workspaces)
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continue;
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if (
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window.window_type == Meta.WindowType.NORMAL ||
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window.window_type == Meta.WindowType.DIALOG ||
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window.window_type == Meta.WindowType.MODAL_DIALOG)
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n ++;
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}
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return n;
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}
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/**
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* Creates an actor showing the current contents of the given WindowActor.
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*
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* @param actor The actor from which to create a snapshot
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* @param inner_rect The inner (actually visible) rectangle of the window
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* @param outer_rect The outer (input region) rectangle of the window
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*
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* @return A copy of the actor at that time or %NULL
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*/
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public static Clutter.Actor? get_window_actor_snapshot (
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Meta.WindowActor actor,
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Meta.Rectangle inner_rect
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) {
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Clutter.Content content;
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try {
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content = actor.paint_to_content (inner_rect);
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} catch (Error e) {
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warning ("Could not create window snapshot: %s", e.message);
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return null;
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}
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if (content == null) {
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warning ("Could not create window snapshot");
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return null;
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}
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var container = new Clutter.Actor ();
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container.set_size (inner_rect.width, inner_rect.height);
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container.content = content;
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return container;
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}
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/**
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* Ring the system bell, will most likely emit a <beep> error sound or, if the
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* audible bell is disabled, flash the display
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*
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* @param display The display to flash, if necessary
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*/
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public static void bell (Meta.Display display) {
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if (Meta.Prefs.bell_is_audible ())
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Gdk.beep ();
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else
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display.get_compositor ().flash_display (display);
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}
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public static int get_ui_scaling_factor () {
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return Meta.Backend.get_backend ().get_settings ().get_ui_scaling_factor ();
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}
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/**
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* Returns the pixbuf that is used for close buttons throughout gala at a
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* size of 36px
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*
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* @return the close button pixbuf or null if it failed to load
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*/
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public static Gdk.Pixbuf? get_close_button_pixbuf () {
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var height = 36 * Utils.get_ui_scaling_factor ();
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if (close_pixbuf == null || close_pixbuf.height != height) {
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try {
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close_pixbuf = new Gdk.Pixbuf.from_resource_at_scale (
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Config.RESOURCEPATH + "/buttons/close.svg",
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-1,
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height,
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true
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);
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} catch (Error e) {
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warning (e.message);
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return null;
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}
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}
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return close_pixbuf;
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}
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/**
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* Creates a new reactive ClutterActor at 36px with the close pixbuf
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*
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* @return The close button actor
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*/
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public static Clutter.Actor create_close_button () {
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var texture = new Clutter.Actor ();
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var pixbuf = get_close_button_pixbuf ();
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texture.reactive = true;
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if (pixbuf != null) {
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try {
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var image = new Clutter.Image ();
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Cogl.PixelFormat pixel_format = (pixbuf.get_has_alpha () ? Cogl.PixelFormat.RGBA_8888 : Cogl.PixelFormat.RGB_888);
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image.set_data (pixbuf.get_pixels (), pixel_format, pixbuf.width, pixbuf.height, pixbuf.rowstride);
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texture.set_content (image);
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texture.set_size (pixbuf.width, pixbuf.height);
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} catch (Error e) {}
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} else {
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// we'll just make this red so there's at least something as an
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// indicator that loading failed. Should never happen and this
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// works as good as some weird fallback-image-failed-to-load pixbuf
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var scale = Utils.get_ui_scaling_factor ();
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texture.set_size (36 * scale, 36 * scale);
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texture.background_color = { 255, 0, 0, 255 };
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}
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return texture;
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}
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/**
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* Returns the pixbuf that is used for resize buttons throughout gala at a
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* size of 36px
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*
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* @return the close button pixbuf or null if it failed to load
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*/
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public static Gdk.Pixbuf? get_resize_button_pixbuf () {
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var height = 36 * Utils.get_ui_scaling_factor ();
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if (resize_pixbuf == null || resize_pixbuf.height != height) {
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try {
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resize_pixbuf = new Gdk.Pixbuf.from_resource_at_scale (
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Config.RESOURCEPATH + "/buttons/resize.svg",
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-1,
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height,
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true
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);
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} catch (Error e) {
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warning (e.message);
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return null;
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}
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}
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return resize_pixbuf;
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}
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/**
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* Creates a new reactive ClutterActor at 36px with the resize pixbuf
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*
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* @return The resize button actor
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*/
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public static Clutter.Actor create_resize_button () {
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var texture = new Clutter.Actor ();
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var pixbuf = get_resize_button_pixbuf ();
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texture.reactive = true;
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if (pixbuf != null) {
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try {
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var image = new Clutter.Image ();
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Cogl.PixelFormat pixel_format = (pixbuf.get_has_alpha () ? Cogl.PixelFormat.RGBA_8888 : Cogl.PixelFormat.RGB_888);
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image.set_data (pixbuf.get_pixels (), pixel_format, pixbuf.width, pixbuf.height, pixbuf.rowstride);
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texture.set_content (image);
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texture.set_size (pixbuf.width, pixbuf.height);
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} catch (Error e) {}
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} else {
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// we'll just make this red so there's at least something as an
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// indicator that loading failed. Should never happen and this
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// works as good as some weird fallback-image-failed-to-load pixbuf
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var scale = Utils.get_ui_scaling_factor ();
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texture.set_size (36 * scale, 36 * scale);
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texture.background_color = { 255, 0, 0, 255 };
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}
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return texture;
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}
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private static Gtk.CssProvider gala_css = null;
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public static unowned Gtk.CssProvider? get_gala_css () {
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if (gala_css == null) {
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gala_css = new Gtk.CssProvider ();
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gala_css.load_from_resource ("/io/elementary/desktop/gala/gala.css");
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}
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return gala_css;
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}
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}
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}
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