/* na-tray-child.c * Copyright (C) 2002 Anders Carlsson * Copyright (C) 2003-2006 Vincent Untz * Copyright (C) 2008 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include #include #include "na-tray-child.h" #include #include #include #include G_DEFINE_TYPE (NaTrayChild, na_tray_child, GTK_TYPE_SOCKET) static void na_tray_child_finalize (GObject *object) { G_OBJECT_CLASS (na_tray_child_parent_class)->finalize (object); } static void na_tray_child_realize (GtkWidget *widget) { NaTrayChild *child = NA_TRAY_CHILD (widget); GdkVisual *visual = gtk_widget_get_visual (widget); GTK_WIDGET_CLASS (na_tray_child_parent_class)->realize (widget); if (child->has_alpha) { /* We have real transparency with an ARGB visual and the Composite * extension. */ /* Set a transparent background */ GdkColor transparent = { 0, 0, 0, 0 }; /* only pixel=0 matters */ gdk_window_set_background (widget->window, &transparent); gdk_window_set_composited (widget->window, TRUE); child->parent_relative_bg = FALSE; } else if (visual == gdk_drawable_get_visual (GDK_DRAWABLE (gdk_window_get_parent (widget->window)))) { /* Otherwise, if the visual matches the visual of the parent window, we * can use a parent-relative background and fake transparency. */ gdk_window_set_back_pixmap (widget->window, NULL, TRUE); child->parent_relative_bg = TRUE; } else { /* Nothing to do; the icon will sit on top of an ugly gray box */ child->parent_relative_bg = FALSE; } gdk_window_set_composited (widget->window, child->composited); gtk_widget_set_app_paintable (GTK_WIDGET (child), child->parent_relative_bg || child->has_alpha); /* Double-buffering will interfere with the parent-relative-background fake * transparency, since the double-buffer code doesn't know how to fill in the * background of the double-buffer correctly. */ gtk_widget_set_double_buffered (GTK_WIDGET (child), child->parent_relative_bg); } static void na_tray_child_style_set (GtkWidget *widget, GtkStyle *previous_style) { /* The default handler resets the background according to the new style. * We either use a transparent background or a parent-relative background * and ignore the style background. So, just don't chain up. */ } #if 0 /* This is adapted from code that was commented out in na-tray-manager.c; the * code in na-tray-manager.c wouldn't have worked reliably, this will. So maybe * it can be reenabled. On other hand, things seem to be working fine without * it. * * If reenabling, you need to hook it up in na_tray_child_class_init(). */ static void na_tray_child_size_request (GtkWidget *widget, GtkRequisition *request) { GTK_WIDGET_CLASS (na_tray_child_parent_class)->size_request (widget, request); /* * Make sure the icons have a meaningful size .. */ if ((request->width < 16) || (request->height < 16)) { gint nw = MAX (24, request->width); gint nh = MAX (24, request->height); g_warning ("Tray icon has requested a size of (%ix%i), resizing to (%ix%i)", req.width, req.height, nw, nh); request->width = nw; request->height = nh; } } #endif static void na_tray_child_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { NaTrayChild *child = NA_TRAY_CHILD (widget); gboolean moved = allocation->x != widget->allocation.x || allocation->y != widget->allocation.y; gboolean resized = allocation->width != widget->allocation.width || allocation->height != widget->allocation.height; /* When we are allocating the widget while mapped we need special handling * for both real and fake transparency. * * Real transparency: we need to invalidate and trigger a redraw of the old * and new areas. (GDK really should handle this for us, but doesn't as of * GTK+-2.14) * * Fake transparency: if the widget moved, we need to force the contents to * be redrawn with the new offset for the parent-relative background. */ if ((moved || resized) && GTK_WIDGET_MAPPED (widget)) { if (na_tray_child_has_alpha (child)) gdk_window_invalidate_rect (gdk_window_get_parent (widget->window), &widget->allocation, FALSE); } GTK_WIDGET_CLASS (na_tray_child_parent_class)->size_allocate (widget, allocation); if ((moved || resized) && GTK_WIDGET_MAPPED (widget)) { if (na_tray_child_has_alpha (NA_TRAY_CHILD (widget))) gdk_window_invalidate_rect (gdk_window_get_parent (widget->window), &widget->allocation, FALSE); else if (moved && child->parent_relative_bg) na_tray_child_force_redraw (child); } } /* The plug window should completely occupy the area of the child, so we won't * get an expose event. But in case we do (the plug unmaps itself, say), this * expose handler draws with real or fake transparency. */ static gboolean na_tray_child_expose_event (GtkWidget *widget, GdkEventExpose *event) { NaTrayChild *child = NA_TRAY_CHILD (widget); if (na_tray_child_has_alpha (child)) { /* Clear to transparent */ cairo_t *cr = gdk_cairo_create (widget->window); cairo_set_source_rgba (cr, 0, 0, 0, 0); cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); gdk_cairo_region (cr, event->region); cairo_fill (cr); cairo_destroy (cr); } else if (child->parent_relative_bg) { /* Clear to parent-relative pixmap */ gdk_window_clear_area (widget->window, event->area.x, event->area.y, event->area.width, event->area.height); } return FALSE; } static void na_tray_child_init (NaTrayChild *child) { } static void na_tray_child_class_init (NaTrayChildClass *klass) { GObjectClass *gobject_class; GtkWidgetClass *widget_class; gobject_class = (GObjectClass *)klass; widget_class = (GtkWidgetClass *)klass; gobject_class->finalize = na_tray_child_finalize; widget_class->style_set = na_tray_child_style_set; widget_class->realize = na_tray_child_realize; widget_class->size_allocate = na_tray_child_size_allocate; widget_class->expose_event = na_tray_child_expose_event; } GtkWidget * na_tray_child_new (GdkScreen *screen, Window icon_window) { XWindowAttributes window_attributes; Display *xdisplay; NaTrayChild *child; GdkVisual *visual; gboolean visual_has_alpha; GdkColormap *colormap; gboolean new_colormap; int result; g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL); g_return_val_if_fail (icon_window != None, NULL); xdisplay = GDK_SCREEN_XDISPLAY (screen); /* We need to determine the visual of the window we are embedding and create * the socket in the same visual. */ gdk_error_trap_push (); result = XGetWindowAttributes (xdisplay, icon_window, &window_attributes); gdk_error_trap_pop (); if (!result) /* Window already gone */ return NULL; visual = gdk_x11_screen_lookup_visual (screen, window_attributes.visual->visualid); if (!visual) /* Icon window is on another screen? */ return NULL; new_colormap = FALSE; if (visual == gdk_screen_get_rgb_visual (screen)) colormap = gdk_screen_get_rgb_colormap (screen); else if (visual == gdk_screen_get_rgba_visual (screen)) colormap = gdk_screen_get_rgba_colormap (screen); else if (visual == gdk_screen_get_system_visual (screen)) colormap = gdk_screen_get_system_colormap (screen); else { colormap = gdk_colormap_new (visual, FALSE); new_colormap = TRUE; } child = g_object_new (NA_TYPE_TRAY_CHILD, NULL); child->icon_window = icon_window; gtk_widget_set_colormap (GTK_WIDGET (child), colormap); /* We have alpha if the visual has something other than red, green, * and blue */ visual_has_alpha = visual->red_prec + visual->blue_prec + visual->green_prec < visual->depth; child->has_alpha = (visual_has_alpha && gdk_display_supports_composite (gdk_screen_get_display (screen))); child->composited = child->has_alpha; if (new_colormap) g_object_unref (colormap); return GTK_WIDGET (child); } char * na_tray_child_get_title (NaTrayChild *child) { char *retval = NULL; GdkDisplay *display; Atom utf8_string, atom, type; int result; int format; gulong nitems; gulong bytes_after; gchar *val; g_return_val_if_fail (NA_IS_TRAY_CHILD (child), NULL); display = gtk_widget_get_display (GTK_WIDGET (child)); utf8_string = gdk_x11_get_xatom_by_name_for_display (display, "UTF8_STRING"); atom = gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_NAME"); gdk_error_trap_push (); result = XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display), child->icon_window, atom, 0, G_MAXLONG, False, utf8_string, &type, &format, &nitems, &bytes_after, (guchar **)&val); if (gdk_error_trap_pop () || result != Success) return NULL; if (type != utf8_string || format != 8 || nitems == 0) { if (val) XFree (val); return NULL; } if (!g_utf8_validate (val, nitems, NULL)) { XFree (val); return NULL; } retval = g_strndup (val, nitems); XFree (val); return retval; } /** * na_tray_child_has_alpha; * @child: a #NaTrayChild * * Checks if the child has an ARGB visual and real alpha transparence. * (as opposed to faked alpha transparency with an parent-relative * background) * * Return value: %TRUE if the child has an alpha transparency */ gboolean na_tray_child_has_alpha (NaTrayChild *child) { g_return_val_if_fail (NA_IS_TRAY_CHILD (child), FALSE); return child->has_alpha; } /** * na_tray_child_set_composited; * @child: a #NaTrayChild * @composited: %TRUE if the child's window should be redirected * * Sets whether the #GdkWindow of the child should be set redirected * using gdk_window_set_composited(). By default this is based off of * na_tray_child_has_alpha(), but it may be useful to override it in * certain circumstances; for example, if the #NaTrayChild is added * to a parent window and that parent window is composited against the * background. */ void na_tray_child_set_composited (NaTrayChild *child, gboolean composited) { g_return_if_fail (NA_IS_TRAY_CHILD (child)); child->composited = composited; if (GTK_WIDGET_REALIZED (child)) gdk_window_set_composited (GTK_WIDGET (child)->window, composited); } /* If we are faking transparency with a window-relative background, force a * redraw of the icon. This should be called if the background changes or if * the child is shifted with respect to the background. */ void na_tray_child_force_redraw (NaTrayChild *child) { GtkWidget *widget = GTK_WIDGET (child); if (GTK_WIDGET_MAPPED (child) && child->parent_relative_bg) { #if 1 /* Sending an ExposeEvent might cause redraw problems if the * icon is expecting the server to clear-to-background before * the redraw. It should be ok for GtkStatusIcon or EggTrayIcon. */ Display *xdisplay = GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (widget)); XEvent xev; xev.xexpose.type = Expose; xev.xexpose.window = GDK_WINDOW_XWINDOW (GTK_SOCKET (child)->plug_window); xev.xexpose.x = 0; xev.xexpose.y = 0; xev.xexpose.width = widget->allocation.width; xev.xexpose.height = widget->allocation.height; xev.xexpose.count = 0; gdk_error_trap_push (); XSendEvent (GDK_DISPLAY_XDISPLAY (gtk_widget_get_display (widget)), xev.xexpose.window, False, ExposureMask, &xev); /* We have to sync to reliably catch errors from the XSendEvent(), * since that is asynchronous. */ XSync (xdisplay, False); gdk_error_trap_pop (); #else /* Hiding and showing is the safe way to do it, but can result in more * flickering. */ gdk_window_hide (widget->window); gdk_window_show (widget->window); #endif } }