Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdebase@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 289 insertions, 0 deletions

diff --git a/kdesktop/xautolock_diy.c b/kdesktop/xautolock_diy.c
new file mode 100644
index 000000000..b9df2f895
--- /dev/null
+++ b/kdesktop/xautolock_diy.c
@@ -0,0 +1,289 @@
+/*****************************************************************************
+ *
+ * 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*           children;          /* children of the window    */
+  unsigned          nofChildren = 0;   /* number of children        */
+  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,
+                   &children, &nofChildren))
+  {
+    return;
+  }
+
+  if (nofChildren) (void) XFree ((char*) children);
+
+ /*
+  *  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 children 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,
+                   &children, &nofChildren))
+  {
+    return;
+  }
+
+ /*
+  *  Now do the same thing for all children.
+  */
+  for (i = 0; i < nofChildren; ++i)
+  {
+    selectEvents (children[i], substructureOnly);
+  }
+
+  if (nofChildren) (void) XFree ((char*) children);
+}
+
+#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
+  }
+}