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-rw-r--r--unix/tkUnixWm.c400
1 files changed, 374 insertions, 26 deletions
diff --git a/unix/tkUnixWm.c b/unix/tkUnixWm.c
index d85a9db..e79b5b1 100644
--- a/unix/tkUnixWm.c
+++ b/unix/tkUnixWm.c
@@ -12,7 +12,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkUnixWm.c,v 1.49 2005/10/21 01:51:45 dkf Exp $
+ * RCS: @(#) $Id: tkUnixWm.c,v 1.50 2005/11/16 02:51:38 jenglish Exp $
*/
#include "tkPort.h"
@@ -43,6 +43,26 @@ typedef struct ProtocolHandler {
((unsigned) (sizeof(ProtocolHandler) - 3 + cmdLength))
/*
+ * Data for [wm attributes] command:
+ */
+typedef struct {
+ double alpha; /* Transparency; 0.0=transparent, 1.0=opaque */
+ int topmost; /* Flag: true=>stay-on-top */
+ int zoomed; /* Flag: true=>maximized */
+ int fullscreen; /* Flag: true=>fullscreen */
+} WmAttributes;
+
+typedef enum {
+ WMATT_ALPHA, WMATT_TOPMOST, WMATT_ZOOMED, WMATT_FULLSCREEN,
+ _WMATT_LAST_ATTRIBUTE
+} WmAttribute;
+
+static const char *WmAttributeNames[] = {
+ "-alpha", "-topmost", "-zoomed", "-fullscreen",
+ NULL
+};
+
+/*
* A data structure of the following type holds window-manager-related
* information for each top-level window in an application.
*/
@@ -184,6 +204,8 @@ typedef struct TkWmInfo {
* Miscellaneous information.
*/
+ WmAttributes attributes; /* Current state of [wm attributes] */
+ WmAttributes reqState; /* Requested state of [wm attributes] */
ProtocolHandler *protPtr; /* First in list of protocol handlers for this
* window (NULL means none). */
int cmdArgc; /* Number of elements in cmdArgv below. */
@@ -312,6 +334,7 @@ static void MenubarDestroyProc(ClientData clientData,
static int ParseGeometry(Tcl_Interp *interp, char *string,
TkWindow *winPtr);
static void ReparentEvent(WmInfo *wmPtr, XReparentEvent *eventPtr);
+static void PropertyEvent(WmInfo *wmPtr, XPropertyEvent *eventPtr);
static void TkWmStackorderToplevelWrapperMap(TkWindow *winPtr,
Display *display, Tcl_HashTable *reparentTable);
static void TopLevelReqProc(ClientData dummy, Tk_Window tkwin);
@@ -324,6 +347,9 @@ static void UpdateTitle(TkWindow *winPtr);
static void UpdatePhotoIcon(TkWindow *winPtr);
static void UpdateVRootGeometry(WmInfo *wmPtr);
static void UpdateWmProtocols(WmInfo *wmPtr);
+static void SetNetWmState(TkWindow*, const char *atomName, int on);
+static void CheckNetWmState(WmInfo *, Atom *atoms, int numAtoms);
+static void UpdateNetWmState(WmInfo *);
static void WaitForConfigureNotify(TkWindow *winPtr,
unsigned long serial);
static int WaitForEvent(Display *display,
@@ -535,6 +561,15 @@ TkWmNewWindow(
wmPtr->hints.window_group = None;
/*
+ * Initialize attributes.
+ */
+ wmPtr->attributes.alpha = 1.0;
+ wmPtr->attributes.topmost = 0;
+ wmPtr->attributes.zoomed = 0;
+ wmPtr->attributes.fullscreen = 0;
+ wmPtr->reqState = wmPtr->attributes;
+
+ /*
* Default the maximum dimensions to the size of the display, minus a
* guess about how space is needed for window manager decorations.
*/
@@ -681,6 +716,11 @@ TkWmMapWindow(
wmPtr->flags &= ~WM_ABOUT_TO_MAP;
/*
+ * Update _NET_WM_STATE hints:
+ */
+ UpdateNetWmState(wmPtr);
+
+ /*
* Map the window, then wait to be sure that the window manager has
* processed the map operation.
*/
@@ -927,14 +967,7 @@ TkWmSetClass(
*
* Tk_WmObjCmd --
*
- * This function is invoked to process the "wm" Tcl command. See the user
- * documentation for details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
+ * This function is invoked to process the "wm" Tcl command.
*
*----------------------------------------------------------------------
*/
@@ -1164,16 +1197,139 @@ WmAspectCmd(
/*
*----------------------------------------------------------------------
*
+ * WmSetAttribute --
+ *
+ * Helper routine for WmAttributesCmd. Sets the value
+ * of the specified attribute.
+ *
+ * Returns:
+ *
+ * TCL_OK if successful, TCL_ERROR otherwise. In case of an
+ * error, leaves a message in the interpreter's result.
+ *
+ *----------------------------------------------------------------------
+ */
+static int WmSetAttribute(
+ TkWindow *winPtr, /* Toplevel to work with */
+ Tcl_Interp *interp, /* Current interpreter */
+ WmAttribute attribute, /* Code of attribute to set */
+ Tcl_Obj *value) /* New value */
+{
+ WmInfo *wmPtr = winPtr->wmInfoPtr;
+ switch (attribute) {
+ case WMATT_ALPHA:
+ {
+ unsigned long opacity; /* 0=transparent, 0xFFFFFFFF=opaque */
+
+ if (TCL_OK != Tcl_GetDoubleFromObj(
+ interp, value, &wmPtr->reqState.alpha)) {
+ return TCL_ERROR;
+ }
+ if (wmPtr->reqState.alpha < 0.0) {
+ wmPtr->reqState.alpha = 0.0;
+ }
+ if (wmPtr->reqState.alpha > 1.0) {
+ wmPtr->reqState.alpha = 1.0;
+ }
+
+ if (!wmPtr->wrapperPtr) {
+ break;
+ }
+
+ opacity = 0xFFFFFFFFul * wmPtr->reqState.alpha;
+ XChangeProperty(winPtr->display, wmPtr->wrapperPtr->window,
+ Tk_InternAtom((Tk_Window)winPtr, "_NET_WM_WINDOW_OPACITY"),
+ XA_CARDINAL, 32, PropModeReplace,
+ (unsigned char *)&opacity, 1L);
+ wmPtr->attributes.alpha = wmPtr->reqState.alpha;
+
+ break;
+ }
+ case WMATT_TOPMOST:
+ if (TCL_OK != Tcl_GetBooleanFromObj(
+ interp, value, &wmPtr->reqState.topmost)) {
+ return TCL_ERROR;
+ }
+ SetNetWmState(winPtr,
+ "_NET_WM_STATE_ABOVE", wmPtr->reqState.topmost);
+ break;
+ case WMATT_ZOOMED:
+ if (TCL_OK != Tcl_GetBooleanFromObj(
+ interp, value, &wmPtr->reqState.zoomed)) {
+ return TCL_ERROR;
+ }
+ SetNetWmState(winPtr,
+ "_NET_WM_STATE_MAXIMIZED_VERT", wmPtr->reqState.zoomed);
+ SetNetWmState(winPtr,
+ "_NET_WM_STATE_MAXIMIZED_HORZ", wmPtr->reqState.zoomed);
+ break;
+ case WMATT_FULLSCREEN:
+ if (TCL_OK != Tcl_GetBooleanFromObj(
+ interp, value, &wmPtr->reqState.fullscreen)) {
+ return TCL_ERROR;
+ }
+ SetNetWmState(winPtr,
+ "_NET_WM_STATE_FULLSCREEN", wmPtr->reqState.fullscreen);
+ break;
+ case _WMATT_LAST_ATTRIBUTE: /* NOTREACHED */
+ return TCL_ERROR;
+ }
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * WmGetAttribute --
+ *
+ * Helper routine for WmAttributesCmd. Returns the current value
+ * of the specified attribute.
+ *
+ * See also: CheckNetWmState().
+ *
+ *----------------------------------------------------------------------
+ */
+static Tcl_Obj *WmGetAttribute(
+ TkWindow *winPtr, /* Toplevel to work with */
+ WmAttribute attribute) /* Code of attribute to get */
+{
+ WmInfo *wmPtr = winPtr->wmInfoPtr;
+ switch (attribute) {
+ case WMATT_ALPHA:
+ return Tcl_NewDoubleObj(wmPtr->attributes.alpha);
+ case WMATT_TOPMOST:
+ return Tcl_NewBooleanObj(wmPtr->attributes.topmost);
+ case WMATT_ZOOMED:
+ return Tcl_NewBooleanObj(wmPtr->attributes.zoomed);
+ case WMATT_FULLSCREEN:
+ return Tcl_NewBooleanObj(wmPtr->attributes.fullscreen);
+ case _WMATT_LAST_ATTRIBUTE: /*NOTREACHED*/
+ break;
+ }
+ /*NOTREACHED*/
+ return NULL;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
* WmAttributesCmd --
*
* This function is invoked to process the "wm attributes" Tcl command.
- * See the user documentation for details on what it does.
*
- * Results:
- * A standard Tcl result.
+ * Syntax:
*
- * Side effects:
- * See the user documentation.
+ * wm attributes $win ?-attribute ?value attribute value...??
+ *
+ * Notes:
+ *
+ * Attributes of mapped windows are set by sending a _NET_WM_STATE
+ * ClientMessage to the root window (see SetNetWmState).
+ * For withdrawn windows, we keep track of the requested attribute
+ * state, and set the _NET_WM_STATE property ourselves immediately
+ * prior to mapping the window.
+ *
+ * See also: TIP#231, EWMH.
*
*----------------------------------------------------------------------
*/
@@ -1186,8 +1342,39 @@ WmAttributesCmd(
int objc, /* Number of arguments. */
Tcl_Obj *CONST objv[]) /* Argument objects. */
{
- if (objc != 3) {
- Tcl_WrongNumArgs(interp, 2, objv, "window");
+ int attribute = 0;
+ if (objc == 3) { /* wm attributes $win */
+ Tcl_Obj *result = Tcl_NewListObj(0,0);
+ for (attribute = 0; attribute < _WMATT_LAST_ATTRIBUTE; ++attribute) {
+ Tcl_ListObjAppendElement(interp, result,
+ Tcl_NewStringObj(WmAttributeNames[attribute], -1));
+ Tcl_ListObjAppendElement(interp, result,
+ WmGetAttribute(winPtr, attribute));
+ }
+ Tcl_SetObjResult(interp, result);
+ return TCL_OK;
+ } else if (objc == 4) { /* wm attributes $win -attribute */
+ if (Tcl_GetIndexFromObj(interp, objv[3], WmAttributeNames,
+ "attribute", 0, &attribute) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ Tcl_SetObjResult(interp,
+ WmGetAttribute(winPtr, attribute));
+ return TCL_OK;
+ } else if ((objc - 3) % 2 == 0) { /* wm attributes $win -att value... */
+ int i;
+ for (i = 3; i < objc; i += 2) {
+ if (Tcl_GetIndexFromObj(interp, objv[i], WmAttributeNames,
+ "attribute", 0, &attribute) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ if (WmSetAttribute(winPtr,interp,attribute,objv[i+1]) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ }
+ return TCL_OK;
+ } else {
+ Tcl_WrongNumArgs(interp, 2, objv, "window ?-attribute ?value ...??");
return TCL_ERROR;
}
return TCL_OK;
@@ -3909,6 +4096,48 @@ ComputeReparentGeometry(
/*
*----------------------------------------------------------------------
*
+ * PropertyEvent --
+ *
+ * Handle PropertyNotify events on wrapper windows.
+ * The following properties are of interest:
+ *
+ * _NET_WM_STATE:
+ * Used to keep wmPtr->attributes up to date.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+PropertyEvent(
+ WmInfo *wmPtr, /* Information about toplevel window. */
+ XPropertyEvent *eventPtr) /* PropertyNotify event structure */
+{
+ TkWindow *wrapperPtr = wmPtr->wrapperPtr;
+ Atom _NET_WM_STATE =
+ Tk_InternAtom((Tk_Window)wmPtr->winPtr, "_NET_WM_STATE");
+
+ if (eventPtr->atom == _NET_WM_STATE) {
+ Atom actualType;
+ int actualFormat;
+ unsigned long numItems, bytesAfter;
+ unsigned char *propertyValue = 0;
+ long maxLength = 1024;
+
+ if (XGetWindowProperty(
+ wrapperPtr->display, wrapperPtr->window, _NET_WM_STATE,
+ 0l, maxLength, False, XA_ATOM,
+ &actualType, &actualFormat, &numItems, &bytesAfter,
+ &propertyValue) == Success
+ ) {
+ CheckNetWmState(wmPtr, (Atom*)propertyValue, (int)numItems);
+ XFree(propertyValue);
+ }
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
* WrapperEventProc --
*
* This function is invoked by the event loop when a wrapper window is
@@ -3924,6 +4153,9 @@ ComputeReparentGeometry(
*----------------------------------------------------------------------
*/
+static const unsigned int WrapperEventMask =
+ (StructureNotifyMask | PropertyChangeMask);
+
static void
WrapperEventProc(
ClientData clientData, /* Information about toplevel window. */
@@ -3979,6 +4211,8 @@ WrapperEventProc(
goto doMapEvent;
} else if (eventPtr->type == ReparentNotify) {
ReparentEvent(wmPtr, &eventPtr->xreparent);
+ } else if (eventPtr->type == PropertyNotify) {
+ PropertyEvent(wmPtr, &eventPtr->xproperty);
}
return;
@@ -4512,6 +4746,128 @@ UpdatePhotoIcon(
/*
*----------------------------------------------------------------------
*
+ * SetNetWmState --
+ *
+ * Sets the specified state property by sending a _NET_WM_STATE
+ * ClientMessage to the root window.
+ *
+ * Preconditions:
+ *
+ * Wrapper window must be created.
+ *
+ * See also:
+ * UpdateNetWmState; EWMH spec, section _NET_WM_STATE.
+ *
+ *----------------------------------------------------------------------
+ */
+
+#define _NET_WM_STATE_REMOVE 0l
+#define _NET_WM_STATE_ADD 1l
+#define _NET_WM_STATE_TOGGLE 2l
+
+static void SetNetWmState(TkWindow *winPtr, const char *atomName, int on)
+{
+ Tk_Window tkwin = (Tk_Window)winPtr;
+ Atom messageType = Tk_InternAtom(tkwin, "_NET_WM_STATE");
+ Atom action = on ? _NET_WM_STATE_ADD : _NET_WM_STATE_REMOVE;
+ Atom property = Tk_InternAtom(tkwin, atomName);
+ XEvent e;
+
+ if (!winPtr->wmInfoPtr->wrapperPtr) {
+ return;
+ }
+
+ e.xany.type = ClientMessage;
+ e.xany.window = winPtr->wmInfoPtr->wrapperPtr->window;
+ e.xclient.message_type = messageType;
+ e.xclient.format = 32;
+ e.xclient.data.l[0] = action;
+ e.xclient.data.l[1] = property;
+ e.xclient.data.l[2] = e.xclient.data.l[3] = e.xclient.data.l[4] = 0l;
+
+ XSendEvent(winPtr->display,
+ RootWindow(winPtr->display, winPtr->screenNum), 0,
+ SubstructureNotifyMask|SubstructureRedirectMask, &e);
+}
+
+/*
+ * CheckNetWmState --
+ *
+ * Updates the window attributes whenever the _NET_WM_STATE
+ * property changes.
+ *
+ * Notes:
+ *
+ * Tk uses a single -zoomed state, while the EWMH spec supports
+ * separate vertical and horizontal maximization. We consider
+ * the window to be "zoomed" if _NET_WM_STATE_MAXIMIZED_VERT
+ * and _NET_WM_STATE_MAXIMIZED_HORZ are both set.
+ */
+static void CheckNetWmState(WmInfo *wmPtr, Atom *atoms, int numAtoms)
+{
+ Tk_Window tkwin = (Tk_Window)wmPtr->wrapperPtr;
+ int i;
+ Atom _NET_WM_STATE_ABOVE
+ = Tk_InternAtom(tkwin, "_NET_WM_STATE_ABOVE"),
+ _NET_WM_STATE_MAXIMIZED_VERT
+ = Tk_InternAtom(tkwin, "_NET_WM_STATE_MAXIMIZED_VERT"),
+ _NET_WM_STATE_MAXIMIZED_HORZ
+ = Tk_InternAtom(tkwin, "_NET_WM_STATE_MAXIMIZED_HORZ"),
+ _NET_WM_STATE_FULLSCREEN
+ = Tk_InternAtom(tkwin, "_NET_WM_STATE_FULLSCREEN");
+
+ wmPtr->attributes.topmost = 0;
+ wmPtr->attributes.zoomed = 0;
+ wmPtr->attributes.fullscreen = 0;
+ for (i = 0; i < numAtoms; ++i) {
+ if (atoms[i] == _NET_WM_STATE_ABOVE) {
+ wmPtr->attributes.topmost = 1;
+ } else if (atoms[i] == _NET_WM_STATE_MAXIMIZED_VERT) {
+ wmPtr->attributes.zoomed |= 1;
+ } else if (atoms[i] == _NET_WM_STATE_MAXIMIZED_HORZ) {
+ wmPtr->attributes.zoomed |= 2;
+ } else if (atoms[i] == _NET_WM_STATE_FULLSCREEN) {
+ wmPtr->attributes.fullscreen = 1;
+ }
+ }
+
+ wmPtr->attributes.zoomed = (wmPtr->attributes.zoomed == 3);
+
+ return;
+}
+
+/*
+ * UpdateNetWmState --
+ *
+ * Sets the _NET_WM_STATE property to match the requested attribute state
+ * just prior to mapping a withdrawn window.
+ */
+#define NET_WM_STATE_MAX_ATOMS 4
+static void UpdateNetWmState(WmInfo *wmPtr)
+{
+ Tk_Window tkwin = (Tk_Window)wmPtr->wrapperPtr;
+ Atom atoms[NET_WM_STATE_MAX_ATOMS];
+ long numAtoms = 0;
+
+ if (wmPtr->reqState.topmost) {
+ atoms[numAtoms++] = Tk_InternAtom(tkwin,"_NET_WM_STATE_ABOVE");
+ }
+ if (wmPtr->reqState.zoomed) {
+ atoms[numAtoms++] = Tk_InternAtom(tkwin,"_NET_WM_STATE_MAXIMIZED_VERT");
+ atoms[numAtoms++] = Tk_InternAtom(tkwin,"_NET_WM_STATE_MAXIMIZED_HORZ");
+ }
+ if (wmPtr->reqState.fullscreen) {
+ atoms[numAtoms++] = Tk_InternAtom(tkwin, "_NET_WM_STATE_FULLSCREEN");
+ }
+
+ XChangeProperty(Tk_Display(tkwin), wmPtr->wrapperPtr->window,
+ Tk_InternAtom(tkwin, "_NET_WM_STATE"), XA_ATOM, 32,
+ PropModeReplace, (unsigned char *)atoms, numAtoms);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
* WaitForConfigureNotify --
*
* This function is invoked in order to synchronize with the window
@@ -6209,8 +6565,8 @@ CreateWrapper(
* etc..
*/
- Tk_CreateEventHandler((Tk_Window) wmPtr->wrapperPtr, StructureNotifyMask,
- WrapperEventProc, (ClientData) wmPtr);
+ Tk_CreateEventHandler((Tk_Window) wmPtr->wrapperPtr,
+ WrapperEventMask, WrapperEventProc, (ClientData) wmPtr);
}
/*
@@ -6567,11 +6923,3 @@ TkpWmSetState(
return 1;
}
-
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 4
- * fill-column: 78
- * End:
- */