Added macfs.FindApplication() to find application FSSpec given signature.

1 files changed, 128 insertions, 0 deletions

diff --git a/Mac/Python/getapplbycreator.c b/Mac/Python/getapplbycreator.c
new file mode 100644
index 0000000..3370f31
--- /dev/null
+++ b/Mac/Python/getapplbycreator.c
@@ -0,0 +1,128 @@
+/*
+** FindApplicationFromCreator uses the Desktop Database to
+** locate the creator application for the given document
+**
+** this routine will check the desktop database of all local
+** disks, then the desktop databases of all server volumes
+** (so up to two passes will be made)
+**
+** This code was created from FindApplicationFromDocument
+** routine, origin unknown.
+*/
+
+#include <Types.h>
+#include <Files.h>
+#include <Errors.h>
+#include "getapplbycreator.h"
+
+
+OSErr FindApplicationFromCreator(OSType creator,
+        FSSpecPtr applicationFSSpecPtr)
+{
+        enum { localPass, remotePass, donePass } volumePass;
+        DTPBRec desktopParams;
+        HParamBlockRec hfsParams;
+        short volumeIndex;
+        Boolean foundFlag;
+        GetVolParmsInfoBuffer volumeInfoBuffer;
+        OSErr retCode;
+
+/* dkj 12/94 initialize flag to false (thanks to Peter Baral for pointing out this bug) */
+        foundFlag = false;
+
+        volumePass = localPass;
+        volumeIndex = 0;
+
+        do {
+				/*
+                ** first, find the vRefNum of the volume whose Desktop Database
+                ** we're checking this time
+				*/
+
+				volumeIndex++;
+
+				/*	convert the volumeIndex into a vRefNum */
+
+				hfsParams.volumeParam.ioNamePtr = nil;
+				hfsParams.volumeParam.ioVRefNum = 0;
+				hfsParams.volumeParam.ioVolIndex = volumeIndex;
+				retCode = PBHGetVInfoSync(&hfsParams);
+
+				/* a nsvErr indicates that the current pass is over */
+				if (retCode == nsvErr) goto SkipThisVolume;
+				if (retCode != noErr) goto Bail;
+
+				/*
+				** call GetVolParms to determine if this volume is a server
+				** (a remote volume)
+				*/
+				
+				hfsParams.ioParam.ioBuffer = (Ptr) &volumeInfoBuffer;
+				hfsParams.ioParam.ioReqCount = sizeof(GetVolParmsInfoBuffer);
+				retCode = PBHGetVolParmsSync(&hfsParams);
+				if (retCode != noErr) goto Bail;
+				
+				/*
+				** if the vMServerAdr field of the volume information buffer
+				** is zero, this is a local volume; skip this volume
+				** if it's local on a remote pass or remote on a local pass
+				*/
+				
+				if ((volumeInfoBuffer.vMServerAdr != 0) !=
+						(volumePass == remotePass)) goto SkipThisVolume;
+
+				/* okay, now we've found the vRefNum for our desktop database call */
+
+				desktopParams.ioVRefNum = hfsParams.volumeParam.ioVRefNum;
+
+				/*
+                ** find the path refNum for the desktop database for
+                ** the volume we're interested in
+                */
+
+                desktopParams.ioNamePtr = nil;
+
+                retCode = PBDTGetPath(&desktopParams);
+                if (retCode == noErr && desktopParams.ioDTRefNum != 0) {
+
+						/*
+                        ** use the GetAPPL call to find the preferred application
+                        ** for opening any document with this one's creator
+                        */
+
+                        desktopParams.ioIndex = 0;
+                        desktopParams.ioFileCreator = creator;
+                        desktopParams.ioNamePtr = applicationFSSpecPtr->name;
+                        retCode = PBDTGetAPPLSync(&desktopParams);
+
+                        if (retCode == noErr) {
+								/*
+                                ** okay, found it; fill in the application file spec
+                                ** and set the flag indicating we're done
+                                */
+
+                                applicationFSSpecPtr->parID = desktopParams.ioAPPLParID;
+                                applicationFSSpecPtr->vRefNum = desktopParams.ioVRefNum;
+                                foundFlag = true;
+
+                        }
+                }
+
+        SkipThisVolume:
+				/*
+                ** if retCode indicates a no such volume error or if this
+                ** was the first pass, it's time to move on to the next pass
+                */
+
+                if (retCode == nsvErr) {
+                        volumePass++;
+                        volumeIndex = 0;
+                }
+
+        } while (foundFlag == false && volumePass != donePass);
+
+Bail:
+		if (retCode == nsvErr)
+			return fnfErr;		/* More logical than "No such volume" */
+        return retCode;
+}