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wmaker: fix xdnd accepted type

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This patch is ensuring that the data dropped is a file format URI
and converting it as stated by XDND specs.
It solves:
*crash in my env when arbitrary stuff is dropped
*correct handling of non ascii chars
This commit is contained in:
David Maciejak
2014-08-07 11:44:35 +07:00
committed by Carlos R. Mafra
parent fe177c6966
commit be5b58aaee
1 changed files with 29 additions and 18 deletions
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45
src/xdnd.c
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@@ -15,6 +15,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <stdio.h>
#include <X11/Xatom.h> #include <X11/Xatom.h>
@@ -65,7 +66,7 @@ void wXDNDMakeAwareness(Window window)
/* /*
MotifDragReceiverInfo info; MotifDragReceiverInfo info;
*/ */
XChangeProperty(dpy, window, _XA_XdndAware, XA_ATOM, 32, PropModeAppend, (char *)&xdnd_version, 1); XChangeProperty(dpy, window, _XA_XdndAware, XA_ATOM, 32, PropModeAppend, (unsigned char *)&xdnd_version, 1);
/*** MOTIF *** /*** MOTIF ***
info.byte_order = '\0'; info.byte_order = '\0';
@@ -84,6 +85,21 @@ void wXDNDMakeAwareness(Window window)
*/ */
} }
void wXDNDDecodeURI(char *uri) {
char *last = uri + strlen(uri);
while (uri < last-2) {
if (*uri == '%') {
int h;
if (sscanf(uri+1, "%2X", &h) != 1)
break;
*uri = h;
memmove(uri+1, uri+3, last - (uri+2));
last -= 2;
}
uri++;
}
}
Bool wXDNDProcessSelection(XEvent * event) Bool wXDNDProcessSelection(XEvent * event)
{ {
WScreen *scr = wScreenForWindow(event->xselection.requestor); WScreen *scr = wScreenForWindow(event->xselection.requestor);
@@ -95,15 +111,11 @@ Bool wXDNDProcessSelection(XEvent * event)
char *delme; char *delme;
XEvent xevent; XEvent xevent;
Window selowner = XGetSelectionOwner(dpy, _XA_XdndSelection); Window selowner = XGetSelectionOwner(dpy, _XA_XdndSelection);
WMArray *items;
XGetWindowProperty(dpy, event->xselection.requestor, XGetWindowProperty(dpy, event->xselection.requestor,
_XA_WINDOWMAKER_XDNDEXCHANGE, _XA_WINDOWMAKER_XDNDEXCHANGE,
0, 65536, True, atom_support, &ret_type, &ret_format, 0, 65536, True, atom_support, &ret_type, &ret_format,
&ret_item, &remain_byte, (unsigned char **)&delme); &ret_item, &remain_byte, (unsigned char **)&delme);
if (delme) {
scr->xdestring = delme;
}
/*send finished */ /*send finished */
memset(&xevent, 0, sizeof(xevent)); memset(&xevent, 0, sizeof(xevent));
@@ -116,12 +128,14 @@ Bool wXDNDProcessSelection(XEvent * event)
XSendEvent(dpy, selowner, 0, 0, &xevent); XSendEvent(dpy, selowner, 0, 0, &xevent);
/*process dropping */ /*process dropping */
if (scr->xdestring) { if (delme) {
WMArray *items;
WMArrayIterator iter; WMArrayIterator iter;
int length, str_size; int length, str_size;
int total_size = 0; int total_size = 0;
char *tmp; char *tmp;
scr->xdestring = delme;
items = WMCreateArray(4); items = WMCreateArray(4);
retain = wstrdup(scr->xdestring); retain = wstrdup(scr->xdestring);
XFree(scr->xdestring); /* since xdestring was created by Xlib */ XFree(scr->xdestring); /* since xdestring was created by Xlib */
@@ -153,23 +167,20 @@ Bool wXDNDProcessSelection(XEvent * event)
scr->xdestring = wmalloc(total_size); scr->xdestring = wmalloc(total_size);
scr->xdestring[0] = 0; /* empty string */ scr->xdestring[0] = 0; /* empty string */
WM_ETARETI_ARRAY(items, tmp, iter) { WM_ETARETI_ARRAY(items, tmp, iter) {
if (!strncmp(tmp, "file:", 5)) { /* only supporting file: URI objects */
/* add more 2 chars while removing 5 is harmless */ if (!strncmp(tmp, "file://", 7)) {
/* drag-and-drop file name format as per the spec is encoded as an URI */
wXDNDDecodeURI(&tmp[7]);
strcat(scr->xdestring, " \""); strcat(scr->xdestring, " \"");
strcat(scr->xdestring, &tmp[5]); strcat(scr->xdestring, &tmp[7]);
strcat(scr->xdestring, "\""); strcat(scr->xdestring, "\"");
} else {
/* unsupport object, still need more " ? tell ]d */
strcat(scr->xdestring, &tmp[5]);
} }
wfree(tmp); wfree(tmp);
} }
WMFreeArray(items); WMFreeArray(items);
if (scr->xdestring[0]) {
wDockReceiveDNDDrop(scr, event); wDockReceiveDNDDrop(scr, event);
/* }
printf("free ");
puts(scr->xdestring);
*/
wfree(scr->xdestring); /* this xdestring is not from Xlib (no XFree) */ wfree(scr->xdestring); /* this xdestring is not from Xlib (no XFree) */
} }
@@ -291,7 +302,7 @@ Bool wXDNDProcessClientMessage(XClientMessageEvent * event)
XConvertSelection(dpy, _XA_XdndSelection, atom_support, XConvertSelection(dpy, _XA_XdndSelection, atom_support,
_XA_WINDOWMAKER_XDNDEXCHANGE, event->window, CurrentTime); _XA_WINDOWMAKER_XDNDEXCHANGE, event->window, CurrentTime);
} else { } else {
puts("wierd selection owner? QT?"); //printf("weird selection owner? QT?\n");
XConvertSelection(dpy, _XA_XdndSelection, atom_support, XConvertSelection(dpy, _XA_XdndSelection, atom_support,
_XA_WINDOWMAKER_XDNDEXCHANGE, event->window, CurrentTime); _XA_WINDOWMAKER_XDNDEXCHANGE, event->window, CurrentTime);
} }