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mutter-performance-source/src/ui/ui.c
Giovanni Campagna d0f2c6be6d ui: always set the frame background to None 
This way the xserver never paints the frame background, even if
the client window is destroyed. This allows us to have clean
destroy window animation.

There is no problem with interactive resizing because applications
are using the XSync protocol, so we're not painting unless the
client has redrawn.

https://bugzilla.gnome.org/show_bug.cgi?id=734054
2014-07-31 17:54:38 +02:00

679 lines
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* Mutter interface for talking to GTK+ UI module */
/*
* Copyright (C) 2002 Havoc Pennington
*
* 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 2 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/>.
*/
#include <config.h>
#include <meta/prefs.h>
#include "ui.h"
#include "frames.h"
#include <meta/util.h>
#include "core.h"
#include "theme-private.h"
#include <string.h>
#include <stdlib.h>
#include <cairo-xlib.h>
struct _MetaUI
{
Display *xdisplay;
Screen *xscreen;
MetaFrames *frames;
/* For double-click tracking */
gint button_click_number;
Window button_click_window;
int button_click_x;
int button_click_y;
guint32 button_click_time;
};
void
meta_ui_init (void)
{
gdk_set_allowed_backends ("x11");
if (!gtk_init_check (NULL, NULL))
meta_fatal ("Unable to open X display %s\n", XDisplayName (NULL));
/* We need to be able to fully trust that the window and monitor sizes
that Gdk reports corresponds to the X ones, so we disable the automatic
scale handling */
gdk_x11_display_set_window_scale (gdk_display_get_default (), 1);
}
Display*
meta_ui_get_display (void)
{
return GDK_DISPLAY_XDISPLAY (gdk_display_get_default ());
}
gint
meta_ui_get_screen_number (void)
{
return gdk_screen_get_number (gdk_screen_get_default ());
}
/* For XInput2 */
#include "display-private.h"
static gboolean
is_input_event (XEvent *event)
{
MetaDisplay *display = meta_get_display ();
return (event->type == GenericEvent &&
event->xcookie.extension == display->xinput_opcode);
}
static gboolean
is_interesting_input_event (XEvent *event)
{
XIEvent *input_event;
if (!is_input_event (event))
return FALSE;
input_event = (XIEvent *) event->xcookie.data;
switch (input_event->evtype)
{
case XI_ButtonPress:
case XI_ButtonRelease:
case XI_Motion:
case XI_Enter:
case XI_Leave:
case XI_TouchBegin:
case XI_TouchUpdate:
case XI_TouchEnd:
return TRUE;
default:
return FALSE;
}
}
/* We do some of our event handling in frames.c, which expects
* GDK events delivered by GTK+. However, since the transition to
* client side windows, we can't let GDK see button events, since the
* client-side tracking of implicit and explicit grabs it does will
* get confused by our direct use of X grabs in the core code.
*
* So we do a very minimal GDK => GTK event conversion here and send on the
* events we care about, and then filter them out so they don't go
* through the normal GDK event handling.
*
* To reduce the amount of code, the only events fields filled out
* below are the ones that frames.c uses. If frames.c is modified to
* use more fields, more fields need to be filled out below.
*/
static void
maybe_redirect_mouse_event (XEvent *xevent)
{
GdkDisplay *gdisplay;
GdkDeviceManager *gmanager;
GdkDevice *gdevice;
MetaUI *ui;
GdkEvent *gevent;
GdkWindow *gdk_window;
Window window;
XIEvent *xev;
XIDeviceEvent *xev_d = NULL;
XIEnterEvent *xev_e = NULL;
xev = (XIEvent *) xevent->xcookie.data;
switch (xev->evtype)
{
case XI_ButtonPress:
case XI_ButtonRelease:
case XI_Motion:
xev_d = (XIDeviceEvent *) xev;
window = xev_d->event;
break;
case XI_Enter:
case XI_Leave:
xev_e = (XIEnterEvent *) xev;
window = xev_e->event;
break;
default:
/* Not interested in this event. */
return;
}
gdisplay = gdk_x11_lookup_xdisplay (xev->display);
ui = g_object_get_data (G_OBJECT (gdisplay), "meta-ui");
if (!ui)
return;
gdk_window = gdk_x11_window_lookup_for_display (gdisplay, window);
if (gdk_window == NULL)
return;
gmanager = gdk_display_get_device_manager (gdisplay);
gdevice = gdk_x11_device_manager_lookup (gmanager, META_VIRTUAL_CORE_POINTER_ID);
switch (xev->evtype)
{
case XI_ButtonPress:
case XI_ButtonRelease:
if (xev_d->evtype == XI_ButtonPress)
{
GtkSettings *settings = gtk_settings_get_default ();
int double_click_time;
int double_click_distance;
int button;
g_object_get (settings,
"gtk-double-click-time", &double_click_time,
"gtk-double-click-distance", &double_click_distance,
NULL);
button = xev_d->detail;
if (button == ui->button_click_number &&
xev_d->event == ui->button_click_window &&
xev_d->time < ui->button_click_time + double_click_time &&
ABS (xev_d->event_x - ui->button_click_x) <= double_click_distance &&
ABS (xev_d->event_y - ui->button_click_y) <= double_click_distance)
{
gevent = gdk_event_new (GDK_2BUTTON_PRESS);
ui->button_click_number = 0;
}
else
{
gevent = gdk_event_new (GDK_BUTTON_PRESS);
ui->button_click_number = button;
ui->button_click_window = xev_d->event;
ui->button_click_time = xev_d->time;
ui->button_click_x = xev_d->event_x;
ui->button_click_y = xev_d->event_y;
}
gevent->button.button = button;
}
else
{
gevent = gdk_event_new (GDK_BUTTON_RELEASE);
gevent->button.button = xev_d->detail;
}
gevent->button.window = g_object_ref (gdk_window);
gevent->button.time = xev_d->time;
gevent->button.x = xev_d->event_x;
gevent->button.y = xev_d->event_y;
gevent->button.x_root = xev_d->root_x;
gevent->button.y_root = xev_d->root_y;
break;
case XI_Motion:
gevent = gdk_event_new (GDK_MOTION_NOTIFY);
gevent->motion.window = g_object_ref (gdk_window);
gevent->motion.time = xev_d->time;
gevent->motion.x = xev_d->event_x;
gevent->motion.y = xev_d->event_y;
gevent->motion.x_root = xev_d->root_x;
gevent->motion.y_root = xev_d->root_y;
if (XIMaskIsSet (xev_d->buttons.mask, 1))
gevent->motion.state |= GDK_BUTTON1_MASK;
break;
case XI_Enter:
case XI_Leave:
gevent = gdk_event_new (xev_e->evtype == XI_Enter ? GDK_ENTER_NOTIFY : GDK_LEAVE_NOTIFY);
gevent->crossing.window = g_object_ref (gdk_window);
gevent->crossing.time = xev_e->time;
gevent->crossing.x = xev_e->event_x;
gevent->crossing.y = xev_e->event_y;
break;
default:
g_assert_not_reached ();
break;
}
/* If we've gotten here, we've created the gdk_event and should send it on */
gdk_event_set_device (gevent, gdevice);
gtk_main_do_event (gevent);
gdk_event_free (gevent);
}
static GdkFilterReturn
ui_filter_func (GdkXEvent *xevent,
GdkEvent *event,
gpointer data)
{
if (is_interesting_input_event (xevent))
{
maybe_redirect_mouse_event (xevent);
return GDK_FILTER_REMOVE;
}
else
return GDK_FILTER_CONTINUE;
}
MetaUI*
meta_ui_new (Display *xdisplay,
Screen *screen)
{
GdkDisplay *gdisplay;
MetaUI *ui;
ui = g_new0 (MetaUI, 1);
ui->xdisplay = xdisplay;
ui->xscreen = screen;
gdisplay = gdk_x11_lookup_xdisplay (xdisplay);
g_assert (gdisplay == gdk_display_get_default ());
ui->frames = meta_frames_new (XScreenNumberOfScreen (screen));
/* GTK+ needs the frame-sync protocol to work in order to properly
* handle style changes. This means that the dummy widget we create
* to get the style for title bars actually needs to be mapped
* and fully tracked as a MetaWindow. Horrible, but mostly harmless -
* the window is a 1x1 overide redirect window positioned offscreen.
*/
gtk_widget_show (GTK_WIDGET (ui->frames));
gdk_window_add_filter (NULL, ui_filter_func, NULL);
g_object_set_data (G_OBJECT (gdisplay), "meta-ui", ui);
return ui;
}
void
meta_ui_free (MetaUI *ui)
{
GdkDisplay *gdisplay;
gtk_widget_destroy (GTK_WIDGET (ui->frames));
gdisplay = gdk_x11_lookup_xdisplay (ui->xdisplay);
g_object_set_data (G_OBJECT (gdisplay), "meta-ui", NULL);
gdk_window_remove_filter (NULL, ui_filter_func, NULL);
g_free (ui);
}
void
meta_ui_get_frame_mask (MetaUI *ui,
Window frame_xwindow,
guint width,
guint height,
cairo_t *cr)
{
meta_frames_get_mask (ui->frames, frame_xwindow, width, height, cr);
}
void
meta_ui_get_frame_borders (MetaUI *ui,
Window frame_xwindow,
MetaFrameBorders *borders)
{
meta_frames_get_borders (ui->frames, frame_xwindow,
borders);
}
static void
set_background_none (Display *xdisplay,
Window xwindow)
{
XSetWindowAttributes attrs;
attrs.background_pixmap = None;
XChangeWindowAttributes (xdisplay, xwindow,
CWBackPixmap, &attrs);
}
Window
meta_ui_create_frame_window (MetaUI *ui,
Display *xdisplay,
Visual *xvisual,
gint x,
gint y,
gint width,
gint height,
gint screen_no,
gulong *create_serial)
{
GdkDisplay *display = gdk_x11_lookup_xdisplay (xdisplay);
GdkScreen *screen = gdk_display_get_screen (display, screen_no);
GdkWindowAttr attrs;
gint attributes_mask;
GdkWindow *window;
GdkVisual *visual;
/* Default depth/visual handles clients with weird visuals; they can
* always be children of the root depth/visual obviously, but
* e.g. DRI games can't be children of a parent that has the same
* visual as the client.
*/
if (!xvisual)
visual = gdk_screen_get_system_visual (screen);
else
{
visual = gdk_x11_screen_lookup_visual (screen,
XVisualIDFromVisual (xvisual));
}
attrs.title = NULL;
/* frame.c is going to replace the event mask immediately, but
* we still have to set it here to let GDK know what it is.
*/
attrs.event_mask =
GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_FOCUS_CHANGE_MASK;
attrs.x = x;
attrs.y = y;
attrs.wclass = GDK_INPUT_OUTPUT;
attrs.visual = visual;
attrs.window_type = GDK_WINDOW_CHILD;
attrs.cursor = NULL;
attrs.wmclass_name = NULL;
attrs.wmclass_class = NULL;
attrs.override_redirect = FALSE;
attrs.width = width;
attrs.height = height;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
/* We make an assumption that gdk_window_new() is going to call
* XCreateWindow as it's first operation; this seems to be true currently
* as long as you pass in a colormap.
*/
if (create_serial)
*create_serial = XNextRequest (xdisplay);
window =
gdk_window_new (gdk_screen_get_root_window(screen),
&attrs, attributes_mask);
gdk_window_resize (window, width, height);
set_background_none (xdisplay, GDK_WINDOW_XID (window));
meta_frames_manage_window (ui->frames, GDK_WINDOW_XID (window), window);
return GDK_WINDOW_XID (window);
}
void
meta_ui_destroy_frame_window (MetaUI *ui,
Window xwindow)
{
meta_frames_unmanage_window (ui->frames, xwindow);
}
void
meta_ui_move_resize_frame (MetaUI *ui,
Window frame,
int x,
int y,
int width,
int height)
{
meta_frames_move_resize_frame (ui->frames, frame, x, y, width, height);
}
void
meta_ui_map_frame (MetaUI *ui,
Window xwindow)
{
GdkWindow *window;
GdkDisplay *display;
display = gdk_x11_lookup_xdisplay (ui->xdisplay);
window = gdk_x11_window_lookup_for_display (display, xwindow);
if (window)
gdk_window_show_unraised (window);
}
void
meta_ui_unmap_frame (MetaUI *ui,
Window xwindow)
{
GdkWindow *window;
GdkDisplay *display;
display = gdk_x11_lookup_xdisplay (ui->xdisplay);
window = gdk_x11_window_lookup_for_display (display, xwindow);
if (window)
gdk_window_hide (window);
}
void
meta_ui_update_frame_style (MetaUI *ui,
Window xwindow)
{
meta_frames_update_frame_style (ui->frames, xwindow);
}
void
meta_ui_repaint_frame (MetaUI *ui,
Window xwindow)
{
meta_frames_repaint_frame (ui->frames, xwindow);
}
cairo_region_t *
meta_ui_get_frame_bounds (MetaUI *ui,
Window xwindow,
int window_width,
int window_height)
{
return meta_frames_get_frame_bounds (ui->frames, xwindow,
window_width, window_height);
}
void
meta_ui_queue_frame_draw (MetaUI *ui,
Window xwindow)
{
meta_frames_queue_draw (ui->frames, xwindow);
}
void
meta_ui_set_frame_title (MetaUI *ui,
Window xwindow,
const char *title)
{
meta_frames_set_title (ui->frames, xwindow, title);
}
GdkPixbuf*
meta_gdk_pixbuf_get_from_pixmap (Pixmap xpixmap,
int src_x,
int src_y,
int width,
int height)
{
cairo_surface_t *surface;
Display *display;
Window root_return;
int x_ret, y_ret;
unsigned int w_ret, h_ret, bw_ret, depth_ret;
XWindowAttributes attrs;
GdkPixbuf *retval;
display = GDK_DISPLAY_XDISPLAY (gdk_display_get_default ());
if (!XGetGeometry (display, xpixmap, &root_return,
&x_ret, &y_ret, &w_ret, &h_ret, &bw_ret, &depth_ret))
return NULL;
if (depth_ret == 1)
{
surface = cairo_xlib_surface_create_for_bitmap (display,
xpixmap,
GDK_SCREEN_XSCREEN (gdk_screen_get_default ()),
w_ret,
h_ret);
}
else
{
if (!XGetWindowAttributes (display, root_return, &attrs))
return NULL;
surface = cairo_xlib_surface_create (display,
xpixmap,
attrs.visual,
w_ret, h_ret);
}
retval = gdk_pixbuf_get_from_surface (surface,
src_x,
src_y,
width,
height);
cairo_surface_destroy (surface);
return retval;
}
gboolean
meta_ui_window_should_not_cause_focus (Display *xdisplay,
Window xwindow)
{
GdkWindow *window;
GdkDisplay *display;
display = gdk_x11_lookup_xdisplay (xdisplay);
window = gdk_x11_window_lookup_for_display (display, xwindow);
/* we shouldn't cause focus if we're an override redirect
* toplevel which is not foreign
*/
if (window && gdk_window_get_window_type (window) == GDK_WINDOW_TEMP)
return TRUE;
else
return FALSE;
}
void
meta_ui_theme_get_frame_borders (MetaUI *ui,
MetaFrameType type,
MetaFrameFlags flags,
MetaFrameBorders *borders)
{
int text_height;
GtkStyleContext *style = NULL;
PangoContext *context;
const PangoFontDescription *font_desc;
PangoFontDescription *free_font_desc = NULL;
if (meta_ui_have_a_theme ())
{
context = gtk_widget_get_pango_context (GTK_WIDGET (ui->frames));
font_desc = meta_prefs_get_titlebar_font ();
if (!font_desc)
{
GdkDisplay *display = gdk_x11_lookup_xdisplay (ui->xdisplay);
GdkScreen *screen = gdk_display_get_screen (display, XScreenNumberOfScreen (ui->xscreen));
GtkWidgetPath *widget_path;
style = gtk_style_context_new ();
gtk_style_context_set_screen (style, screen);
widget_path = gtk_widget_path_new ();
gtk_widget_path_append_type (widget_path, GTK_TYPE_WINDOW);
gtk_style_context_set_path (style, widget_path);
gtk_widget_path_free (widget_path);
gtk_style_context_get (style, GTK_STATE_FLAG_NORMAL, "font", &free_font_desc, NULL);
font_desc = (const PangoFontDescription *) free_font_desc;
}
text_height = meta_pango_font_desc_get_text_height (font_desc, context);
meta_theme_get_frame_borders (meta_theme_get_current (),
type, text_height, flags,
borders);
if (free_font_desc)
pango_font_description_free (free_font_desc);
}
else
{
meta_frame_borders_clear (borders);
}
if (style != NULL)
g_object_unref (style);
}
void
meta_ui_set_current_theme (const char *name)
{
meta_theme_set_current (name);
meta_invalidate_default_icons ();
}
gboolean
meta_ui_have_a_theme (void)
{
return meta_theme_get_current () != NULL;
}
gboolean
meta_ui_window_is_widget (MetaUI *ui,
Window xwindow)
{
GdkDisplay *display;
GdkWindow *window;
display = gdk_x11_lookup_xdisplay (ui->xdisplay);
window = gdk_x11_window_lookup_for_display (display, xwindow);
if (window)
{
void *user_data = NULL;
gdk_window_get_user_data (window, &user_data);
return user_data != NULL && user_data != ui->frames;
}
else
return FALSE;
}
int
meta_ui_get_drag_threshold (MetaUI *ui)
{
GtkSettings *settings;
int threshold;
settings = gtk_widget_get_settings (GTK_WIDGET (ui->frames));
threshold = 8;
g_object_get (G_OBJECT (settings), "gtk-dnd-drag-threshold", &threshold, NULL);
return threshold;
}
MetaUIDirection
meta_ui_get_direction (void)
{
if (gtk_widget_get_default_direction() == GTK_TEXT_DIR_RTL)
return META_UI_DIRECTION_RTL;
return META_UI_DIRECTION_LTR;
}
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