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tint2/src/util/window.c
o9000 c3ed2dadf3 Fix issue #684
2017-11-26 17:22:58 +01:00

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/**************************************************************************
*
* Tint2 : common windows function
*
* Copyright (C) 2007 Pål Staurland (staura@gmail.com)
* Modified (C) 2008 thierry lorthiois (lorthiois@bbsoft.fr) from Omega distribution
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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 <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <Imlib2.h>
#include <cairo.h>
#include <cairo-xlib.h>
#include <X11/extensions/XShm.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include "common.h"
#include "window.h"
#include "server.h"
#include "panel.h"
#include "taskbar.h"
void activate_window(Window win)
{
send_event32(win, server.atom._NET_ACTIVE_WINDOW, 2, CurrentTime, 0);
}
void change_window_desktop(Window win, int desktop)
{
send_event32(win, server.atom._NET_WM_DESKTOP, desktop, 2, 0);
}
void close_window(Window win)
{
send_event32(win, server.atom._NET_CLOSE_WINDOW, 0, 2, 0);
}
void toggle_window_shade(Window win)
{
send_event32(win, server.atom._NET_WM_STATE, 2, server.atom._NET_WM_STATE_SHADED, 0);
}
void toggle_window_maximized(Window win)
{
send_event32(win, server.atom._NET_WM_STATE, 2, server.atom._NET_WM_STATE_MAXIMIZED_VERT, 0);
send_event32(win, server.atom._NET_WM_STATE, 2, server.atom._NET_WM_STATE_MAXIMIZED_HORZ, 0);
}
gboolean window_is_hidden(Window win)
{
Window window;
int count;
Atom *at = server_get_property(win, server.atom._NET_WM_STATE, XA_ATOM, &count);
for (int i = 0; i < count; i++) {
if (at[i] == server.atom._NET_WM_STATE_SKIP_TASKBAR) {
XFree(at);
return TRUE;
}
// do not add transient_for windows if the transient window is already in the taskbar
window = win;
while (XGetTransientForHint(server.display, window, &window)) {
if (get_task_buttons(window)) {
XFree(at);
return TRUE;
}
}
}
XFree(at);
at = server_get_property(win, server.atom._NET_WM_WINDOW_TYPE, XA_ATOM, &count);
for (int i = 0; i < count; i++) {
if (at[i] == server.atom._NET_WM_WINDOW_TYPE_DOCK || at[i] == server.atom._NET_WM_WINDOW_TYPE_DESKTOP ||
at[i] == server.atom._NET_WM_WINDOW_TYPE_TOOLBAR || at[i] == server.atom._NET_WM_WINDOW_TYPE_MENU ||
at[i] == server.atom._NET_WM_WINDOW_TYPE_SPLASH) {
XFree(at);
return TRUE;
}
}
XFree(at);
for (int i = 0; i < num_panels; i++) {
if (panels[i].main_win == win) {
return TRUE;
}
}
// specification
// Windows with neither _NET_WM_WINDOW_TYPE nor WM_TRANSIENT_FOR set
// MUST be taken as top-level window.
return FALSE;
}
int get_window_desktop(Window win)
{
int desktop = get_property32(win, server.atom._NET_WM_DESKTOP, XA_CARDINAL);
if (desktop == ALL_DESKTOPS)
return desktop;
if (!server.viewports)
return CLAMP(desktop, 0, server.num_desktops - 1);
int x, y, w, h;
get_window_coordinates(win, &x, &y, &w, &h);
desktop = get_current_desktop();
// Window coordinates are relative to the current viewport, make them absolute
x += server.viewports[desktop].x;
y += server.viewports[desktop].y;
if (x < 0 || y < 0) {
int num_results;
long *x_screen_size =
server_get_property(server.root_win, server.atom._NET_DESKTOP_GEOMETRY, XA_CARDINAL, &num_results);
if (!x_screen_size)
return 0;
int x_screen_width = x_screen_size[0];
int x_screen_height = x_screen_size[1];
XFree(x_screen_size);
// Wrap
if (x < 0)
x += x_screen_width;
if (y < 0)
y += x_screen_height;
}
int best_match = -1;
int match_right = 0;
int match_bottom = 0;
// There is an ambiguity when a window is right on the edge between viewports.
// In that case, prefer the viewports which is on the right and bottom of the window's top-left corner.
for (int i = 0; i < server.num_desktops; i++) {
if (x >= server.viewports[i].x && x <= (server.viewports[i].x + server.viewports[i].width) &&
y >= server.viewports[i].y && y <= (server.viewports[i].y + server.viewports[i].height)) {
int current_right = x < (server.viewports[i].x + server.viewports[i].width);
int current_bottom = y < (server.viewports[i].y + server.viewports[i].height);
if (best_match < 0 || (!match_right && current_right) || (!match_bottom && current_bottom)) {
best_match = i;
}
}
}
if (best_match < 0)
best_match = 0;
// fprintf(stderr, "tint2: window %lx %s : viewport %d, (%d, %d)\n", win, get_task(win) ? get_task(win)->title :
// "??",
// best_match+1, x, y);
return best_match;
}
int get_window_monitor(Window win)
{
int x, y, w, h;
get_window_coordinates(win, &x, &y, &w, &h);
int best_match = -1;
int match_right = 0;
int match_bottom = 0;
// There is an ambiguity when a window is right on the edge between screens.
// In that case, prefer the monitor which is on the right and bottom of the window's top-left corner.
for (int i = 0; i < server.num_monitors; i++) {
if (x >= server.monitors[i].x && x <= (server.monitors[i].x + server.monitors[i].width) &&
y >= server.monitors[i].y && y <= (server.monitors[i].y + server.monitors[i].height)) {
int current_right = x < (server.monitors[i].x + server.monitors[i].width);
int current_bottom = y < (server.monitors[i].y + server.monitors[i].height);
if (best_match < 0 || (!match_right && current_right) || (!match_bottom && current_bottom)) {
best_match = i;
}
}
}
if (best_match < 0)
best_match = 0;
// fprintf(stderr, "tint2: desktop %d, window %lx %s : monitor %d, (%d, %d)\n", 1 + get_current_desktop(), win,
// get_task(win) ? get_task(win)->title : "??", best_match+1, x, y);
return best_match;
}
gboolean get_window_coordinates(Window win, int *x, int *y, int *w, int *h)
{
int dummy_int;
unsigned ww, wh, bw, bh;
Window src;
if (!XTranslateCoordinates(server.display, win, server.root_win, 0, 0, x, y, &src))
return FALSE;
if (!XGetGeometry(server.display, win, &src, &dummy_int, &dummy_int, &ww, &wh, &bw, &bh))
return FALSE;
*w = ww + bw;
*h = wh + bw;
return TRUE;
}
gboolean window_is_iconified(Window win)
{
// EWMH specification : minimization of windows use _NET_WM_STATE_HIDDEN.
// WM_STATE is not accurate for shaded window and in multi_desktop mode.
int count;
Atom *at = server_get_property(win, server.atom._NET_WM_STATE, XA_ATOM, &count);
for (int i = 0; i < count; i++) {
if (at[i] == server.atom._NET_WM_STATE_HIDDEN) {
XFree(at);
return TRUE;
}
}
XFree(at);
return FALSE;
}
gboolean window_is_urgent(Window win)
{
int count;
Atom *at = server_get_property(win, server.atom._NET_WM_STATE, XA_ATOM, &count);
for (int i = 0; i < count; i++) {
if (at[i] == server.atom._NET_WM_STATE_DEMANDS_ATTENTION) {
XFree(at);
return TRUE;
}
}
XFree(at);
return FALSE;
}
gboolean window_is_skip_taskbar(Window win)
{
int count;
Atom *at = server_get_property(win, server.atom._NET_WM_STATE, XA_ATOM, &count);
for (int i = 0; i < count; i++) {
if (at[i] == server.atom._NET_WM_STATE_SKIP_TASKBAR) {
XFree(at);
return 1;
}
}
XFree(at);
return FALSE;
}
Window get_active_window()
{
return get_property32(server.root_win, server.atom._NET_ACTIVE_WINDOW, XA_WINDOW);
}
gboolean window_is_active(Window win)
{
return (win == get_property32(server.root_win, server.atom._NET_ACTIVE_WINDOW, XA_WINDOW));
}
int get_icon_count(gulong *data, int num)
{
int count, pos, w, h;
count = 0;
pos = 0;
while (pos + 2 < num) {
w = data[pos++];
h = data[pos++];
pos += w * h;
if (pos > num || w <= 0 || h <= 0)
break;
count++;
}
return count;
}
gulong *get_best_icon(gulong *data, int icon_count, int num, int *iw, int *ih, int best_icon_size)
{
if (icon_count < 1 || num < 1)
return NULL;
int width[icon_count], height[icon_count], pos, i, w, h;
gulong *icon_data[icon_count];
/* List up icons */
pos = 0;
i = icon_count;
while (i--) {
w = data[pos++];
h = data[pos++];
if (pos + w * h > num)
break;
width[i] = w;
height[i] = h;
icon_data[i] = &data[pos];
pos += w * h;
}
/* Try to find exact size */
int icon_num = -1;
for (i = 0; i < icon_count; i++) {
if (width[i] == best_icon_size) {
icon_num = i;
break;
}
}
/* Take the biggest or whatever */
if (icon_num < 0) {
int highest = 0;
for (i = 0; i < icon_count; i++) {
if (width[i] > highest) {
icon_num = i;
highest = width[i];
}
}
}
*iw = width[icon_num];
*ih = height[icon_num];
return icon_data[icon_num];
}
// Thanks zcodes!
char *get_window_name(Window win)
{
XTextProperty text_property;
Status status = XGetWMName(server.display, win, &text_property);
if (!status || !text_property.value || !text_property.nitems) {
return strdup("");
}
char **name_list;
int count;
status = Xutf8TextPropertyToTextList(server.display, &text_property, &name_list, &count);
if (status < Success || !count) {
XFree(text_property.value);
return strdup("");
}
if (!name_list[0]) {
XFreeStringList(name_list);
XFree(text_property.value);
return strdup("");
}
char *result = strdup(name_list[0]);
XFreeStringList(name_list);
XFree(text_property.value);
return result;
}
void smooth_thumbnail(cairo_surface_t *image_surface)
{
u_int32_t *data = (u_int32_t *)cairo_image_surface_get_data(image_surface);
const size_t tw = cairo_image_surface_get_width(image_surface);
const size_t th = cairo_image_surface_get_height(image_surface);
const size_t rmask = 0xff0000;
const size_t gmask = 0xff00;
const size_t bmask = 0xff;
for (size_t i = 0; i < tw * (th - 1) - 1; i++) {
u_int32_t c1 = data[i];
u_int32_t c2 = data[i + 1];
u_int32_t c3 = data[i + tw];
u_int32_t c4 = data[i + tw + 1];
u_int32_t b = (5 * (c1 & bmask) + 1 * (c2 & bmask) + 1 * (c3 & bmask) + 1 * (c4 & bmask)) / 8;
u_int32_t g = (5 * (c1 & gmask) + 1 * (c2 & gmask) + 1 * (c3 & gmask) + 1 * (c4 & gmask)) / 8;
u_int32_t r = (5 * (c1 & rmask) + 1 * (c2 & rmask) + 1 * (c3 & rmask) + 1 * (c4 & rmask)) / 8;
data[i] = (r & rmask) | (g & gmask) | (b & bmask);
}
}
// This is measured to be slightly faster.
#define GetPixel(ximg, x, y) ((u_int32_t *)&(ximg->data[y * ximg->bytes_per_line]))[x]
//#define GetPixel XGetPixel
cairo_surface_t *get_window_thumbnail_ximage(Window win, size_t size, gboolean use_shm)
{
cairo_surface_t *result = NULL;
XWindowAttributes wa;
if (!XGetWindowAttributes(server.display, win, &wa) || wa.width <= 0 || wa.height <= 0 ||
wa.map_state != IsViewable)
goto err0;
if (window_is_iconified(win))
goto err0;
size_t w, h;
w = (size_t)wa.width;
h = (size_t)wa.height;
size_t tw, th, fw;
size_t ox, oy;
tw = size;
th = h * tw / w;
if (th > tw * 0.618) {
th = (size_t)(tw * 0.618);
fw = w * th / h;
ox = (tw - fw) / 2;
oy = 0;
} else {
fw = tw;
ox = oy = 0;
}
XShmSegmentInfo shminfo;
XImage *ximg;
if (use_shm)
ximg = XShmCreateImage(server.display,
wa.visual,
(unsigned)wa.depth,
ZPixmap,
NULL,
&shminfo,
(unsigned)w,
(unsigned)h);
else
ximg = XGetImage(server.display, win, 0, 0, (unsigned)w, (unsigned)h, AllPlanes, ZPixmap);
if (!ximg) {
fprintf(stderr, RED "tint2: !ximg" RESET "\n");
goto err0;
}
if (ximg->bits_per_pixel != 24 && ximg->bits_per_pixel != 32) {
fprintf(stderr, RED "tint2: unusual bits_per_pixel" RESET "\n");
goto err1;
}
if (use_shm) {
shminfo.shmid = shmget(IPC_PRIVATE, (size_t)(ximg->bytes_per_line * ximg->height), IPC_CREAT | 0777);
if (shminfo.shmid < 0) {
fprintf(stderr, RED "tint2: !shmget" RESET "\n");
goto err1;
}
shminfo.shmaddr = ximg->data = (char *)shmat(shminfo.shmid, 0, 0);
if (!shminfo.shmaddr) {
fprintf(stderr, RED "tint2: !shmat" RESET "\n");
goto err2;
}
shminfo.readOnly = False;
if (!XShmAttach(server.display, &shminfo)) {
fprintf(stderr, RED "tint2: !xshmattach" RESET "\n");
goto err3;
}
if (!XShmGetImage(server.display, win, ximg, 0, 0, AllPlanes)) {
fprintf(stderr, RED "tint2: !xshmgetimage" RESET "\n");
goto err4;
}
}
XGetWindowAttributes(server.display, win, &wa);
if (wa.map_state != IsViewable)
goto err4;
result = cairo_image_surface_create(CAIRO_FORMAT_RGB24, (int)tw, (int)th);
u_int32_t *data = (u_int32_t *)cairo_image_surface_get_data(result);
memset(data, 0, tw * th);
// Fixed-point precision
const size_t prec = 1 << 16;
const size_t xstep = w * prec / fw;
const size_t ystep = h * prec / th;
const size_t offset_y1 = 0 * ystep / 8;
const size_t offset_x1 = 3 * xstep / 8;
const size_t offset_y2 = 1 * ystep / 8;
const size_t offset_x2 = 6 * xstep / 8;
const size_t offset_y3 = 4 * ystep / 8;
const size_t offset_x3 = 2 * xstep / 8;
const size_t offset_y4 = 4 * ystep / 8;
const size_t offset_x4 = 4 * xstep / 8;
const size_t offset_y5 = 4 * ystep / 8;
const size_t offset_x5 = 7 * xstep / 8;
const size_t offset_y6 = 6 * ystep / 8;
const size_t offset_x6 = 1 * xstep / 8;
const size_t offset_y7 = 7 * ystep / 8;
const size_t offset_x7 = 6 * xstep / 8;
const u_int32_t rmask = (u_int32_t)ximg->red_mask;
const u_int32_t gmask = (u_int32_t)ximg->green_mask;
const u_int32_t bmask = (u_int32_t)ximg->blue_mask;
for (size_t yt = 0, y = 0; yt < th; yt++, y += ystep) {
for (size_t xt = 0, x = 0; xt < fw; xt++, x += xstep) {
size_t j = yt * tw + ox + xt;
u_int32_t c1 = (u_int32_t)GetPixel(ximg, (int)((x + offset_x1) / prec), (int)((y + offset_y1) / prec));
u_int32_t c2 = (u_int32_t)GetPixel(ximg, (int)((x + offset_x2) / prec), (int)((y + offset_y2) / prec));
u_int32_t c3 = (u_int32_t)GetPixel(ximg, (int)((x + offset_x3) / prec), (int)((y + offset_y3) / prec));
u_int32_t c4 = (u_int32_t)GetPixel(ximg, (int)((x + offset_x4) / prec), (int)((y + offset_y4) / prec));
u_int32_t c5 = (u_int32_t)GetPixel(ximg, (int)((x + offset_x5) / prec), (int)((y + offset_y5) / prec));
u_int32_t c6 = (u_int32_t)GetPixel(ximg, (int)((x + offset_x6) / prec), (int)((y + offset_y6) / prec));
u_int32_t c7 = (u_int32_t)GetPixel(ximg, (int)((x + offset_x7) / prec), (int)((y + offset_y7) / prec));
u_int32_t b = ((c1 & bmask) + (c2 & bmask) + (c3 & bmask) + (c4 & bmask) + (c5 & bmask) * 2 + (c6 & bmask) +
(c7 & bmask)) /
8;
u_int32_t g = ((c1 & gmask) + (c2 & gmask) + (c3 & gmask) + (c4 & gmask) + (c5 & gmask) * 2 + (c6 & gmask) +
(c7 & gmask)) /
8;
u_int32_t r = ((c1 & rmask) + (c2 & rmask) + (c3 & rmask) + (c4 & rmask) + (c5 & rmask) * 2 + (c6 & rmask) +
(c7 & rmask)) /
8;
data[j] = (r & rmask) | (g & gmask) | (b & bmask);
}
}
// Convert to argb32
if (rmask & 0xff0000) {
// argb32 or rgb24 => Nothing to do
} else if (rmask & 0xff) {
// bgr24
for (size_t i = 0; i < tw * th; i++) {
u_int32_t r = (data[i] & rmask) << 16;
u_int32_t g = (data[i] & gmask);
u_int32_t b = (data[i] & bmask) >> 16;
data[i] = (r & 0xff0000) | (g & 0x00ff00) | (b & 0x0000ff);
}
} else if (rmask & 0xff00) {
// bgra32
for (size_t i = 0; i < tw * th; i++) {
u_int32_t r = (data[i] & rmask) << 8;
u_int32_t g = (data[i] & gmask) >> 8;
u_int32_t b = (data[i] & bmask) >> 24;
data[i] = (r & 0xff0000) | (g & 0x00ff00) | (b & 0x0000ff);
}
}
// 2nd pass
smooth_thumbnail(result);
if (ximg) {
XDestroyImage(ximg);
ximg = NULL;
}
err4:
if (use_shm)
XShmDetach(server.display, &shminfo);
err3:
if (use_shm)
shmdt(shminfo.shmaddr);
err2:
if (use_shm)
shmctl(shminfo.shmid, IPC_RMID, NULL);
err1:
if (ximg)
XDestroyImage(ximg);
err0:
return result;
}
gboolean cairo_surface_is_blank(cairo_surface_t *image_surface)
{
uint32_t *pixels = (uint32_t *)cairo_image_surface_get_data(image_surface);
gboolean empty = TRUE;
int size = cairo_image_surface_get_width(image_surface) * cairo_image_surface_get_height(image_surface);
for (int i = 0; empty && i < size; i++) {
if (pixels[i] & 0xffFFff)
empty = FALSE;
}
return empty;
}
cairo_surface_t *get_window_thumbnail(Window win, int size)
{
cairo_surface_t *image_surface = NULL;
const gboolean shm_allowed = FALSE;
if (shm_allowed && server.has_shm && server.composite_manager) {
image_surface = get_window_thumbnail_ximage(win, (size_t)size, TRUE);
if (image_surface && cairo_surface_is_blank(image_surface)) {
cairo_surface_destroy(image_surface);
image_surface = NULL;
}
if (debug_thumbnails) {
if (!image_surface)
fprintf(stderr, YELLOW "tint2: XShmGetImage failed, trying slower method" RESET "\n");
else
fprintf(stderr, "tint2: captured window using XShmGetImage\n");
}
}
if (!image_surface) {
image_surface = get_window_thumbnail_ximage(win, (size_t)size, FALSE);
if (image_surface && cairo_surface_is_blank(image_surface)) {
cairo_surface_destroy(image_surface);
image_surface = NULL;
}
if (debug_thumbnails) {
if (!image_surface)
fprintf(stderr, YELLOW "tint2: XGetImage failed, trying slower method" RESET "\n");
else
fprintf(stderr, "tint2: captured window using XGetImage\n");
}
}
if (!image_surface)
return NULL;
return image_surface;
}
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