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annotate dep/animia/src/util/osx.cc @ 162:61b76c7b656a

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dep/animia: add os x launchservices method
author Paper <mrpapersonic@gmail.com>
date Fri, 17 Nov 2023 16:49:57 -0500
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children 44c5e6dd9488
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61b76c7b656a dep/animia: add os x launchservices method
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1 /* A wrapper around multiple LaunchServices things */
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2
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3 #include "animia/util/osx.h"
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4
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5 #include <CoreFoundation/CoreFoundation.h>
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6
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7 #include <iostream>
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8
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9 namespace animia::internal::osx::util {
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10
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11 #define RDSymbolNameStr(symbol) (CFSTR("_"#symbol))
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12
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13 static constexpr int kLaunchServicesMagicConstant = -2; // or -1, dunno the difference
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14
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15 typedef CFTypeRef (*LSASNCreateWithPidSpec)(CFAllocatorRef, pid_t);
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16 typedef CFDictionaryRef (*LSCopyApplicationInformationSpec)(int, CFTypeRef, CFArrayRef);
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18 static LSCopyApplicationInformationSpec LSCopyApplicationInformation = nullptr;
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19 static LSASNCreateWithPidSpec LSASNCreateWithPid = nullptr;
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20
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21 static CFStringRef (kLSDisplayNameKey) = nullptr;
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22 static CFStringRef (kLSPIDKey) = nullptr;
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23
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24 static CFStringRef (kLaunchServicesBundleID) = CFSTR("com.apple.LaunchServices");
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25
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26 static bool FindLaunchServicesPrivateSymbols() {
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27 CFBundleRef launch_services_bundle = CFBundleGetBundleWithIdentifier(kLaunchServicesBundleID);
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28 if (!launch_services_bundle)
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29 return false;
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30
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31 LSCopyApplicationInformation = (LSCopyApplicationInformationSpec)CFBundleGetFunctionPointerForName(launch_services_bundle, RDSymbolNameStr(LSCopyApplicationInformation));
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32 if (!LSCopyApplicationInformation)
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33 return false;
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34
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35 LSASNCreateWithPid = (LSASNCreateWithPidSpec)CFBundleGetFunctionPointerForName(launch_services_bundle, RDSymbolNameStr(LSASNCreateWithPid));
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36 if (!LSASNCreateWithPid)
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37 return false;
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38
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39 kLSDisplayNameKey = *(CFStringRef*)CFBundleGetDataPointerForName(launch_services_bundle, RDSymbolNameStr(kLSDisplayNameKey));
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40 if (!kLSDisplayNameKey)
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41 return false;
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42
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43 kLSPIDKey = *(CFStringRef*)CFBundleGetDataPointerForName(launch_services_bundle, RDSymbolNameStr(kLSPIDKey));
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44 if (!kLSPIDKey)
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45 return false;
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46
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47 return true;
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48 }
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49
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50 bool LaunchServicesGetProcessName(pid_t pid, std::string& result) {
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51 if (!LSCopyApplicationInformation || !LSASNCreateWithPid)
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52 if (!FindLaunchServicesPrivateSymbols())
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53 return false;
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54
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55 CFTypeRef asn = LSASNCreateWithPid(kCFAllocatorDefault, pid);
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56
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57 CFArrayRef request_array = CFArrayCreate(NULL, (const void **)kLSDisplayNameKey, 1, NULL);
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58
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59 CFDictionaryRef dictionary = LSCopyApplicationInformation(kLaunchServicesMagicConstant, asn, request_array);
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60
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61 CFRelease(request_array);
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62 if (!dictionary)
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63 return false;
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64
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65 CFStringRef str;
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66 if (!CFDictionaryGetValueIfPresent(dictionary, kLSDisplayNameKey, (CFTypeRef*)&str) || !str) {
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67 CFRelease(dictionary);
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68 return false;
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69 }
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70 CFRetain(str);
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71
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72 CFRelease(dictionary);
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74 result.reserve(CFStringGetMaximumSizeForEncoding(CFStringGetLength(str), kCFStringEncodingUTF8) + 1);
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75
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76 if (!CFStringGetCString(str, &result.front(), result.length(), result.length())) {
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77 CFRelease(str);
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78 return false;
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79 }
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80
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81 CFRelease(str);
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82
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83 return true;
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84 }
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85
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86 }