You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
290 lines
7.5 KiB
290 lines
7.5 KiB
/*****************************************************************************
|
|
*
|
|
* Authors: Michel Eyckmans (MCE) & Stefan De Troch (SDT)
|
|
*
|
|
* Content: This file is part of version 2.x of xautolock. It implements
|
|
* the stuff used when the program is not using a screen saver
|
|
* extension and thus has to use the good old "do it yourself"
|
|
* approach for detecting user activity.
|
|
*
|
|
* The basic idea is that we initially traverse the window tree,
|
|
* selecting SubstructureNotify on all windows and adding each
|
|
* window to a temporary list. About +- 30 seconds later, we
|
|
* scan this list, now asking for KeyPress events. The delay
|
|
* is needed in order to interfere as little as possible with
|
|
* the event propagation mechanism. Whenever a new window is
|
|
* created by an application, a similar process takes place.
|
|
*
|
|
* Please send bug reports etc. to eyckmans@imec.be.
|
|
*
|
|
* --------------------------------------------------------------------------
|
|
*
|
|
* Copyright 1990,1992-1999,2001-2002 by Stefan De Troch and Michel Eyckmans.
|
|
*
|
|
* Versions 2.0 and above of xautolock are available under version 2 of the
|
|
* GNU GPL. Earlier versions are available under other conditions. For more
|
|
* information, see the License file.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <X11/Xlib.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
|
|
#include "xautolock_c.h"
|
|
|
|
static void selectEvents (Window window, Bool substructureOnly);
|
|
|
|
/*
|
|
* Window queue management.
|
|
*/
|
|
typedef struct item
|
|
{
|
|
Window window;
|
|
time_t creationtime;
|
|
struct item* next;
|
|
} xautolock_anItem, *xautolock_item;
|
|
|
|
static struct
|
|
{
|
|
Display* display;
|
|
struct item* head;
|
|
struct item* tail;
|
|
} queue;
|
|
|
|
static void
|
|
addToQueue (Window window)
|
|
{
|
|
xautolock_item newItem = malloc(sizeof(xautolock_anItem));
|
|
|
|
newItem->window = window;
|
|
newItem->creationtime = time (0);
|
|
newItem->next = 0;
|
|
|
|
if (!queue.head) queue.head = newItem;
|
|
if ( queue.tail) queue.tail->next = newItem;
|
|
|
|
queue.tail = newItem;
|
|
}
|
|
|
|
static void
|
|
processQueue (time_t age)
|
|
{
|
|
if (queue.head)
|
|
{
|
|
time_t now = time (0);
|
|
xautolock_item current = queue.head;
|
|
|
|
while (current && current->creationtime + age < now)
|
|
{
|
|
selectEvents (current->window, False);
|
|
queue.head = current->next;
|
|
free (current);
|
|
current = queue.head;
|
|
}
|
|
|
|
if (!queue.head) queue.tail = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function for selecting all interesting events on a given
|
|
* (tree of) window(s).
|
|
*/
|
|
static void
|
|
selectEvents (Window window, Bool substructureOnly)
|
|
{
|
|
Window root; /* root window of the window */
|
|
Window parent; /* parent of the window */
|
|
Window* tqchildren; /* tqchildren of the window */
|
|
unsigned nofChildren = 0; /* number of tqchildren */
|
|
unsigned i; /* loop counter */
|
|
XWindowAttributes attribs; /* attributes of the window */
|
|
|
|
if( xautolock_ignoreWindow( window ))
|
|
return;
|
|
/*
|
|
* Start by querying the server about the root and parent windows.
|
|
*/
|
|
if (!XQueryTree (queue.display, window, &root, &parent,
|
|
&tqchildren, &nofChildren))
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (nofChildren) (void) XFree ((char*) tqchildren);
|
|
|
|
/*
|
|
* Build the appropriate event mask. The basic idea is that we don't
|
|
* want to interfere with the normal event propagation mechanism if
|
|
* we don't have to.
|
|
*
|
|
* On the root window, we need to ask for both substructureNotify
|
|
* and KeyPress events. On all other windows, we always need
|
|
* substructureNotify, but only need Keypress if some other client
|
|
* also asked for them, or if they are not being propagated up the
|
|
* window tree.
|
|
*/
|
|
#if 0
|
|
if (substructureOnly)
|
|
{
|
|
(void) XSelectInput (queue.display, window, SubstructureNotifyMask);
|
|
}
|
|
else
|
|
{
|
|
if (parent == None) /* the *real* rootwindow */
|
|
{
|
|
attribs.all_event_masks =
|
|
attribs.do_not_propagate_mask = KeyPressMask;
|
|
}
|
|
else if (!XGetWindowAttributes (queue.display, window, &attribs))
|
|
#else
|
|
{
|
|
if (!XGetWindowAttributes (queue.display, window, &attribs))
|
|
#endif
|
|
{
|
|
return;
|
|
}
|
|
|
|
#if 0
|
|
(void) XSelectInput (queue.display, window,
|
|
SubstructureNotifyMask
|
|
| ( ( attribs.all_event_masks
|
|
| attribs.do_not_propagate_mask)
|
|
& KeyPressMask));
|
|
#else
|
|
{
|
|
int mask = SubstructureNotifyMask | attribs.your_event_mask;
|
|
if( !substructureOnly )
|
|
{
|
|
mask |= ( ( attribs.all_event_masks
|
|
| attribs.do_not_propagate_mask)
|
|
& KeyPressMask );
|
|
}
|
|
(void) XSelectInput (queue.display, window, mask );
|
|
}
|
|
#endif
|
|
|
|
}
|
|
|
|
/*
|
|
* Now ask for the list of tqchildren again, since it might have changed
|
|
* in between the last time and us selecting SubstructureNotifyMask.
|
|
*
|
|
* There is a (very small) chance that we might process a subtree twice:
|
|
* child windows that have been created after our XSelectinput() has
|
|
* been processed but before we get to the XQueryTree() bit will be
|
|
* in this situation. This is harmless. It could be avoided by using
|
|
* XGrabServer(), but that'd be an impolite thing to do, and since it
|
|
* isn't required...
|
|
*/
|
|
if (!XQueryTree (queue.display, window, &root, &parent,
|
|
&tqchildren, &nofChildren))
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Now do the same thing for all tqchildren.
|
|
*/
|
|
for (i = 0; i < nofChildren; ++i)
|
|
{
|
|
selectEvents (tqchildren[i], substructureOnly);
|
|
}
|
|
|
|
if (nofChildren) (void) XFree ((char*) tqchildren);
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* Function for processing any events that have come in since
|
|
* last time. It is crucial that this function does not block
|
|
* in case nothing interesting happened.
|
|
*/
|
|
void
|
|
processEvents (void)
|
|
{
|
|
while (XPending (queue.display))
|
|
{
|
|
XEvent event;
|
|
|
|
if (XCheckMaskEvent (queue.display, SubstructureNotifyMask, &event))
|
|
{
|
|
if (event.type == CreateNotify)
|
|
{
|
|
addToQueue (event.xcreatewindow.window);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
(void) XNextEvent (queue.display, &event);
|
|
}
|
|
|
|
/*
|
|
* Reset the triggers if and only if the event is a
|
|
* KeyPress event *and* was not generated by XSendEvent().
|
|
*/
|
|
if ( event.type == KeyPress
|
|
&& !event.xany.send_event)
|
|
{
|
|
resetTriggers ();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check the window queue for entries that are older than
|
|
* CREATION_DELAY seconds.
|
|
*/
|
|
processQueue ((time_t) CREATION_DELAY);
|
|
}
|
|
#else
|
|
void xautolock_processEvent( XEvent* event )
|
|
{
|
|
if (event->type == CreateNotify)
|
|
{
|
|
addToQueue (event->xcreatewindow.window);
|
|
}
|
|
/*
|
|
* Reset the triggers if and only if the event is a
|
|
* KeyPress event *and* was not generated by XSendEvent().
|
|
*/
|
|
if ( event->type == KeyPress
|
|
&& !event->xany.send_event)
|
|
{
|
|
xautolock_resetTriggers ();
|
|
}
|
|
}
|
|
|
|
void xautolock_processQueue()
|
|
{
|
|
/*
|
|
* Check the window queue for entries that are older than
|
|
* CREATION_DELAY seconds.
|
|
*/
|
|
processQueue ((time_t) CREATION_DELAY);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Function for initialising the whole shebang.
|
|
*/
|
|
void
|
|
xautolock_initDiy (Display* d)
|
|
{
|
|
int s;
|
|
|
|
queue.display = d;
|
|
queue.tail = 0;
|
|
queue.head = 0;
|
|
|
|
for (s = -1; ++s < ScreenCount (d); )
|
|
{
|
|
Window root = RootWindowOfScreen (ScreenOfDisplay (d, s));
|
|
addToQueue (root);
|
|
#if 0
|
|
selectEvents (root, True);
|
|
#endif
|
|
}
|
|
}
|