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awesome/xwindow.c

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/*
* xwindow.c - X window handling functions
*
* Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
*
* 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include "xwindow.h"
#include "common/atoms.h"
#include "objects/button.h"
#include <xcb/xcb.h>
#include <xcb/shape.h>
#include <cairo-xcb.h>
/** Mask shorthands */
#define BUTTONMASK (XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE)
/** Set client state (WM_STATE) property.
* \param win The window to set state.
* \param state The state to set.
*/
void
xwindow_set_state(xcb_window_t win, uint32_t state)
{
uint32_t data[] = { state, XCB_NONE };
xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE, win,
WM_STATE, WM_STATE, 32, 2, data);
}
/** Send request to get a window state (WM_STATE).
* \param w A client window.
* \return The cookie associated with the request.
*/
xcb_get_property_cookie_t
xwindow_get_state_unchecked(xcb_window_t w)
{
return xcb_get_property_unchecked(globalconf.connection, false, w, WM_STATE,
WM_STATE, 0L, 2L);
}
/** Get a window state (WM_STATE).
* \param cookie The cookie.
* \return The current state of the window, or 0 on error.
*/
uint32_t
xwindow_get_state_reply(xcb_get_property_cookie_t cookie)
{
/* If no property is set, we just assume a sane default. */
uint32_t result = XCB_ICCCM_WM_STATE_NORMAL;
xcb_get_property_reply_t *prop_r;
if((prop_r = xcb_get_property_reply(globalconf.connection, cookie, NULL)))
{
if(xcb_get_property_value_length(prop_r))
result = *(uint32_t *) xcb_get_property_value(prop_r);
p_delete(&prop_r);
}
return result;
}
/** Configure a window with its new geometry and border size.
* \param win The X window id to configure.
* \param geometry The new window geometry.
* \param border The new border size.
*/
void
xwindow_configure(xcb_window_t win, area_t geometry, int border)
{
xcb_configure_notify_event_t ce;
ce.response_type = XCB_CONFIGURE_NOTIFY;
ce.event = win;
ce.window = win;
ce.x = geometry.x + border;
ce.y = geometry.y + border;
ce.width = geometry.width;
ce.height = geometry.height;
ce.border_width = border;
ce.above_sibling = XCB_NONE;
ce.override_redirect = false;
xcb_send_event(globalconf.connection, false, win,
XCB_EVENT_MASK_STRUCTURE_NOTIFY, (char *) &ce);
}
/** Grab or ungrab buttons on a window.
* \param win The window.
* \param buttons The buttons to grab.
*/
void
xwindow_buttons_grab(xcb_window_t win, button_array_t *buttons)
{
if(win == XCB_NONE)
return;
/* Ungrab everything first */
xcb_ungrab_button(globalconf.connection, XCB_BUTTON_INDEX_ANY, win, XCB_BUTTON_MASK_ANY);
foreach(b, *buttons)
xcb_grab_button(globalconf.connection, false, win, BUTTONMASK,
XCB_GRAB_MODE_SYNC, XCB_GRAB_MODE_ASYNC, XCB_NONE, XCB_NONE,
(*b)->button, (*b)->modifiers);
}
/** Grab key on a window.
* \param win The window.
* \param k The key.
*/
static void
xwindow_grabkey(xcb_window_t win, keyb_t *k)
{
if(k->keycode)
xcb_grab_key(globalconf.connection, true, win,
k->modifiers, k->keycode, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
else if(k->keysym)
{
xcb_keycode_t *keycodes = xcb_key_symbols_get_keycode(globalconf.keysyms, k->keysym);
if(keycodes)
{
for(xcb_keycode_t *kc = keycodes; *kc; kc++)
xcb_grab_key(globalconf.connection, true, win,
k->modifiers, *kc, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
p_delete(&keycodes);
}
}
}
void
xwindow_grabkeys(xcb_window_t win, key_array_t *keys)
{
/* Ungrab everything first */
xcb_ungrab_key(globalconf.connection, XCB_GRAB_ANY, win, XCB_BUTTON_MASK_ANY);
foreach(k, *keys)
xwindow_grabkey(win, *k);
}
/** Send a request for a window's opacity.
* \param win The window
* \return A cookie for xwindow_get_opacity_from_reply().
*/
xcb_get_property_cookie_t
xwindow_get_opacity_unchecked(xcb_window_t win)
{
return xcb_get_property_unchecked(globalconf.connection, false, win,
_NET_WM_WINDOW_OPACITY, XCB_ATOM_CARDINAL, 0L, 1L);
}
/** Get the opacity of a window.
* \param win The window.
* \return The opacity, between 0 and 1 or -1 or no opacity set.
*/
double
xwindow_get_opacity(xcb_window_t win)
{
xcb_get_property_cookie_t prop_c =
xwindow_get_opacity_unchecked(win);
return xwindow_get_opacity_from_cookie(prop_c);
}
/** Get the opacity of a window.
* \param cookie A cookie for a reply to a get property request for _NET_WM_WINDOW_OPACITY.
* \return The opacity, between 0 and 1.
*/
double
xwindow_get_opacity_from_cookie(xcb_get_property_cookie_t cookie)
{
xcb_get_property_reply_t *prop_r =
xcb_get_property_reply(globalconf.connection, cookie, NULL);
if(prop_r && prop_r->value_len && prop_r->format == 32)
{
uint32_t value = *(uint32_t *) xcb_get_property_value(prop_r);
p_delete(&prop_r);
return (double) value / (double) 0xffffffff;
}
p_delete(&prop_r);
return -1;
}
/** Set opacity of a window.
* \param win The window.
* \param opacity Opacity of the window, between 0 and 1.
*/
void
xwindow_set_opacity(xcb_window_t win, double opacity)
{
if(win)
{
if(opacity >= 0 && opacity <= 1)
{
uint32_t real_opacity = opacity * 0xffffffff;
xcb_change_property(globalconf.connection, XCB_PROP_MODE_REPLACE, win,
_NET_WM_WINDOW_OPACITY, XCB_ATOM_CARDINAL, 32, 1L, &real_opacity);
}
else
xcb_delete_property(globalconf.connection, win, _NET_WM_WINDOW_OPACITY);
}
}
/** Send WM_TAKE_FOCUS client message to window
* \param win destination window
*/
void
xwindow_takefocus(xcb_window_t win)
{
xcb_client_message_event_t ev;
/* Initialize all of event's fields first */
p_clear(&ev, 1);
ev.response_type = XCB_CLIENT_MESSAGE;
ev.window = win;
ev.format = 32;
ev.data.data32[1] = globalconf.timestamp;
ev.type = WM_PROTOCOLS;
ev.data.data32[0] = WM_TAKE_FOCUS;
xcb_send_event(globalconf.connection, false, win,
XCB_EVENT_MASK_NO_EVENT, (char *) &ev);
}
/** Set window cursor.
* \param w The window.
* \param c The cursor.
*/
void
xwindow_set_cursor(xcb_window_t w, xcb_cursor_t c)
{
xcb_change_window_attributes(globalconf.connection, w, XCB_CW_CURSOR,
(const uint32_t[]) { c });
}
/** Set a window border color.
* \param w The window.
* \param color The color.
*/
void
xwindow_set_border_color(xcb_window_t w, color_t *color)
{
if(w)
xcb_change_window_attributes(globalconf.connection, w, XCB_CW_BORDER_PIXEL, &color->pixel);
}
/** Get one of a window's shapes as a cairo surface */
cairo_surface_t *
xwindow_get_shape(xcb_window_t win, enum xcb_shape_sk_t kind)
{
if (!globalconf.have_shape)
return NULL;
if (kind == XCB_SHAPE_SK_INPUT && !globalconf.have_input_shape)
return NULL;
int16_t x, y;
uint16_t width, height;
xcb_shape_get_rectangles_cookie_t rcookie = xcb_shape_get_rectangles(globalconf.connection, win, kind);
if (kind == XCB_SHAPE_SK_INPUT)
{
/* We cannot query the size/existence of an input shape... */
xcb_get_geometry_reply_t *geom = xcb_get_geometry_reply(globalconf.connection,
xcb_get_geometry(globalconf.connection, win), NULL);
if (!geom)
{
xcb_discard_reply(globalconf.connection, rcookie.sequence);
/* Create a cairo surface in an error state */
return cairo_image_surface_create(CAIRO_FORMAT_INVALID, -1, -1);
}
x = 0;
y = 0;
width = geom->width;
height = geom->height;
}
else
{
xcb_shape_query_extents_cookie_t ecookie = xcb_shape_query_extents(globalconf.connection, win);
xcb_shape_query_extents_reply_t *extents = xcb_shape_query_extents_reply(globalconf.connection, ecookie, NULL);
bool shaped;
if (!extents)
{
xcb_discard_reply(globalconf.connection, rcookie.sequence);
/* Create a cairo surface in an error state */
return cairo_image_surface_create(CAIRO_FORMAT_INVALID, -1, -1);
}
if (kind == XCB_SHAPE_SK_BOUNDING)
{
x = extents->bounding_shape_extents_x;
y = extents->bounding_shape_extents_y;
width = extents->bounding_shape_extents_width;
height = extents->bounding_shape_extents_height;
shaped = extents->bounding_shaped;
} else {
check(kind == XCB_SHAPE_SK_CLIP);
x = extents->clip_shape_extents_x;
y = extents->clip_shape_extents_y;
width = extents->clip_shape_extents_width;
height = extents->clip_shape_extents_height;
shaped = extents->clip_shaped;
}
p_delete(&extents);
if (!shaped)
{
xcb_discard_reply(globalconf.connection, rcookie.sequence);
return NULL;
}
}
xcb_shape_get_rectangles_reply_t *rects_reply = xcb_shape_get_rectangles_reply(globalconf.connection, rcookie, NULL);
if (!rects_reply)
{
/* Create a cairo surface in an error state */
return cairo_image_surface_create(CAIRO_FORMAT_INVALID, -1, -1);
}
cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_A1, width, height);
cairo_t *cr = cairo_create(surface);
int num_rects = xcb_shape_get_rectangles_rectangles_length(rects_reply);
xcb_rectangle_t *rects = xcb_shape_get_rectangles_rectangles(rects_reply);
cairo_surface_set_device_offset(surface, -x, -y);
cairo_set_fill_rule(cr, CAIRO_FILL_RULE_WINDING);
for (int i = 0; i < num_rects; i++)
cairo_rectangle(cr, rects[i].x, rects[i].y, rects[i].width, rects[i].height);
cairo_fill(cr);
cairo_destroy(cr);
free(rects_reply);
return surface;
}
/** Turn a cairo surface into a pixmap with depth 1 */
static xcb_pixmap_t
xwindow_shape_pixmap(int width, int height, cairo_surface_t *surf)
{
xcb_pixmap_t pixmap = xcb_generate_id(globalconf.connection);
cairo_surface_t *dest;
cairo_t *cr;
if (width <= 0 || height <= 0)
return XCB_NONE;
xcb_create_pixmap(globalconf.connection, 1, pixmap, globalconf.screen->root, width, height);
dest = cairo_xcb_surface_create_for_bitmap(globalconf.connection, globalconf.screen, pixmap, width, height);
cr = cairo_create(dest);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(cr, surf, 0, 0);
cairo_paint(cr);
cairo_destroy(cr);
cairo_surface_flush(dest);
cairo_surface_finish(dest);
cairo_surface_destroy(dest);
return pixmap;
}
/** Set one of a window's shapes */
void
xwindow_set_shape(xcb_window_t win, int width, int height, enum xcb_shape_sk_t kind, cairo_surface_t *surf, int offset)
{
if (!globalconf.have_shape)
return;
if (kind == XCB_SHAPE_SK_INPUT && !globalconf.have_input_shape)
return;
xcb_pixmap_t pixmap = XCB_NONE;
if (surf)
pixmap = xwindow_shape_pixmap(width, height, surf);
xcb_shape_mask(globalconf.connection, XCB_SHAPE_SO_SET, kind, win, offset, offset, pixmap);
if (pixmap != XCB_NONE)
xcb_free_pixmap(globalconf.connection, pixmap);
}
/** Calculate the position change that a window needs applied.
* \param gravity The window gravity that should be used.
* \param change_width_before The window width difference that will be applied.
* \param change_height_before The window height difference that will be applied.
* \param change_width_after The window width difference that will be applied.
* \param change_height_after The window height difference that will be applied.
* \param dx On return, this will be changed by the amount the pixel has to be moved.
* \param dy On return, this will be changed by the amount the pixel has to be moved.
*/
void xwindow_translate_for_gravity(xcb_gravity_t gravity, int16_t change_width_before, int16_t change_height_before,
int16_t change_width_after, int16_t change_height_after, int16_t *dx, int16_t *dy)
{
int16_t x = 0, y = 0;
int16_t change_height = change_height_before + change_height_after;
int16_t change_width = change_width_before + change_width_after;
switch (gravity) {
case XCB_GRAVITY_WIN_UNMAP:
case XCB_GRAVITY_NORTH_WEST:
break;
case XCB_GRAVITY_NORTH:
x = -change_width / 2;
break;
case XCB_GRAVITY_NORTH_EAST:
x = -change_width;
break;
case XCB_GRAVITY_WEST:
y = -change_height / 2;
break;
case XCB_GRAVITY_CENTER:
x = -change_width / 2;
y = -change_height / 2;
break;
case XCB_GRAVITY_EAST:
x = -change_width;
y = -change_height / 2;
break;
case XCB_GRAVITY_SOUTH_WEST:
y = -change_height;
break;
case XCB_GRAVITY_SOUTH:
x = -change_width / 2;
y = -change_height;
break;
case XCB_GRAVITY_SOUTH_EAST:
x = -change_width;
y = -change_height;
break;
case XCB_GRAVITY_STATIC:
x = -change_width_before;
y = -change_height_before;
break;
}
if (dx)
*dx += x;
if (dy)
*dy += y;
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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