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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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47
src/xdnd.c
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@@ -15,6 +15,7 @@
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <X11/Xatom.h>
@@ -65,7 +66,7 @@ void wXDNDMakeAwareness(Window window)
/*
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 ***
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)
{
WScreen *scr = wScreenForWindow(event->xselection.requestor);
@@ -95,15 +111,11 @@ Bool wXDNDProcessSelection(XEvent * event)
char *delme;
XEvent xevent;
Window selowner = XGetSelectionOwner(dpy, _XA_XdndSelection);
WMArray *items;
XGetWindowProperty(dpy, event->xselection.requestor,
_XA_WINDOWMAKER_XDNDEXCHANGE,
0, 65536, True, atom_support, &ret_type, &ret_format,
&ret_item, &remain_byte, (unsigned char **)&delme);
if (delme) {
scr->xdestring = delme;
}
/*send finished */
memset(&xevent, 0, sizeof(xevent));
@@ -116,12 +128,14 @@ Bool wXDNDProcessSelection(XEvent * event)
XSendEvent(dpy, selowner, 0, 0, &xevent);
/*process dropping */
if (scr->xdestring) {
if (delme) {
WMArray *items;
WMArrayIterator iter;
int length, str_size;
int total_size = 0;
char *tmp;
scr->xdestring = delme;
items = WMCreateArray(4);
retain = wstrdup(scr->xdestring);
XFree(scr->xdestring); /* since xdestring was created by Xlib */
@@ -153,23 +167,20 @@ Bool wXDNDProcessSelection(XEvent * event)
scr->xdestring = wmalloc(total_size);
scr->xdestring[0] = 0; /* empty string */
WM_ETARETI_ARRAY(items, tmp, iter) {
if (!strncmp(tmp, "file:", 5)) {
/* add more 2 chars while removing 5 is harmless */
/* only supporting file: URI objects */
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, &tmp[5]);
strcat(scr->xdestring, &tmp[7]);
strcat(scr->xdestring, "\"");
} else {
/* unsupport object, still need more " ? tell ]d */
strcat(scr->xdestring, &tmp[5]);
}
wfree(tmp);
}
WMFreeArray(items);
wDockReceiveDNDDrop(scr, event);
/*
printf("free ");
puts(scr->xdestring);
*/
if (scr->xdestring[0]) {
wDockReceiveDNDDrop(scr, event);
}
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,
_XA_WINDOWMAKER_XDNDEXCHANGE, event->window, CurrentTime);
} else {
puts("wierd selection owner? QT?");
//printf("weird selection owner? QT?\n");
XConvertSelection(dpy, _XA_XdndSelection, atom_support,
_XA_WINDOWMAKER_XDNDEXCHANGE, event->window, CurrentTime);
}