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Re: Set default browser and mailapp

At 18:04 +0200 23/10/02, Christian Weykopf wrote:
are there any errors in my code? I've tried it on severel machines.
In my app I write a lot more keys. All are stored except the mailapp and browser. This happens with Jaguar and 10.1.5.

The code looks OK, except that you've commented out the following.

/* strcpy (&icAppSpec.name[1], "Internet Explorer");
icAppSpec.name[0] = strlen ("Internet Explorer");*/

I assume that you tried it out both ways and neither worked?

* * *

I actually wrote some code to test this. The code is included below. I switch the mailto helper, rather than the HTTP helper, because that's more convenient for me. I originally had problems getting this to work, but I eventually figured out the problem. Mac OS X is much more picky about the value you supply for spec.name than traditional Mac OS. On older systems, the spec.name value was just a comment, but Mac OS X passes it to Launch Services to help find the application. If you don't get the value right, the call fails silently. In my case, I had to change "Mail" to "Mail.app" to get things to work.

The LS call used is LSFindApplicationForInfo, so I use that to preflight the call.

I think there's room for improvement in our implementation of ICSetPref, so I filed this as a bug [Radar ID 3083201].

S+E

Quinn

----------------------------------------------------------------------------
/*
File: ICTest.c

Contains: A program to toggle the mail helper between Mail and Eudora.

Written by: DTS

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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Change History (most recent first):

*/

#if defined(__MACH__)
#include <Carbon/Carbon.h>
#else
#include <MacTypes.h>
#include <InternetConfig.h>
#include <PLStringFuncs.h>
#include <LaunchServices.h>
#include <CFStringEncodingExt.h>
#endif

#include <stdio.h>
#include <assert.h>

void main(void)
{
OSStatus err;
OSStatus junk;
ICInstance inst;
fprintf(stderr, "Hello Cruel World!\n");
fprintf(stderr, "Standard.c\n");
err = ICStart(&inst, '????');
if (err == noErr) {
ICAppSpec spec;
ICAppSpec newSpec;
ICAttr junkAttr;
long size;

size = sizeof(spec);
err = ICGetPref(inst, "\pHelper*mailto", &junkAttr, &spec, &size);
if (err == noErr) {
if (spec.fCreator == 'CSOm') {
spec.fCreator = 'emal';
PLstrcpy(spec.name, "\pMail.app");
fprintf(stderr, "Switching to mail.\n");
} else {
spec.fCreator = 'CSOm';
PLstrcpy(spec.name, "\pEudora");
fprintf(stderr, "Switching to Eudora.\n");
}
}

if (err == noErr) {
OSStatus lsErr;
FSRef appRef;
CFStringRef appName;

appName = CFStringCreateWithPascalString(NULL, spec.name, kCFStringEncodingMacHFS);
assert(appName != NULL);

lsErr = LSFindApplicationForInfo(spec.fCreator, NULL, appName, &appRef, NULL );
if (lsErr != noErr) {
fprintf(stderr, "*** This probably isn't going to work.\n");
}
CFRelease(appName);
}

if (err == noErr) {
err = ICSetPref(inst, "\pHelper*mailto", kICAttrNoChange, &spec, sizeof(spec));
}
if (err == noErr) {
size = sizeof(newSpec);
err = ICGetPref(inst, "\pHelper*mailto", &junkAttr, &newSpec, &size);
}
if (err == noErr) {
if (newSpec.fCreator != spec.fCreator) {
fprintf(stderr, "*** Change did not stick.\n");
}
}
junk = ICStop(inst);
assert(junk == noErr);
}
if (err == noErr) {
fprintf(stderr, "Success.\n");
} else {
fprintf(stderr, "Failed with error %ld.\n", err);
}
fprintf(stderr, "Done. Press command-Q to Quit.\n");
}
----------------------------------------------------------------------------

--
Quinn "The Eskimo!" <http://www.apple.com/developer/>
Apple Developer Technical Support * Networking, Communications, Hardware
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References: 
 >Re: Set default browser and mailapp (From: Christian Weykopf <email@hidden>)



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