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The JUCE cross-platform C++ framework, with DISTRHO/KXStudio specific changes
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JUCE/modules/juce_gui_basics/native/juce_android_ContentSharer.cpp

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  1. /*

  2.   ==============================================================================

  3. 

  4.    This file is part of the JUCE library.

  5.    Copyright (c) 2017 - ROLI Ltd.

  6. 

  7.    JUCE is an open source library subject to commercial or open-source

  8.    licensing.

  9. 

  10.    By using JUCE, you agree to the terms of both the JUCE 5 End-User License

  11.    Agreement and JUCE 5 Privacy Policy (both updated and effective as of the

  12.    27th April 2017).

  13. 

  14.    End User License Agreement: www.juce.com/juce-5-licence

  15.    Privacy Policy: www.juce.com/juce-5-privacy-policy

  16. 

  17.    Or: You may also use this code under the terms of the GPL v3 (see

  18.    www.gnu.org/licenses).

  19. 

  20.    JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER

  21.    EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE

  22.    DISCLAIMED.

  23. 

  24.   ==============================================================================

  25. */

  26. namespace juce

  27. {

  28. 

  29. //==============================================================================

  30. // This byte-code is generated from native/javacore/app/com/roli/juce/JuceSharingContentProvider.java with min sdk version 16

  31. // See juce_core/native/java/README.txt on how to generate this byte-code.

  32. static const uint8 javaJuceSharingContentProvider[] =

  33. {31,139,8,8,143,106,229,91,0,3,74,117,99,101,83,104,97,114,105,110,103,67,111,110,116,101,110,116,80,114,111,118,105,100,

  34. 101,114,46,100,101,120,0,149,151,93,108,20,85,20,199,207,157,153,157,253,236,178,91,170,20,145,178,229,83,80,216,242,165,

  35. 96,5,11,45,72,183,91,139,161,52,218,190,56,221,157,148,129,221,153,101,102,118,133,23,2,106,162,209,196,24,125,64,19,73,

  36. 48,33,106,140,15,36,26,227,131,49,152,24,163,241,65,77,148,248,160,209,152,152,24,193,68,227,131,6,37,241,127,63,118,219,

  37. 173,197,232,194,111,238,185,231,156,123,238,185,231,222,153,206,148,237,19,137,190,173,219,105,239,208,216,231,67,47,106,

  38. 177,200,154,39,135,207,172,189,226,63,113,230,173,189,99,175,63,244,123,185,131,168,70,68,39,38,182,117,146,250,157,79,

  39. 17,141,146,212,223,4,46,48,34,110,252,3,109,4,237,103,26,209,82,222,71,171,163,189,132,203,80,156,40,103,16,125,111,18,

  40. 253,4,126,6,191,129,107,224,58,232,137,18,245,130,53,96,3,216,2,14,131,6,120,25,188,11,190,1,191,128,100,140,104,19,112,

  41. 192,235,224,50,184,6,110,193,28,187,192,3,192,6,117,240,52,120,6,60,15,206,130,115,224,101,240,10,120,3,188,9,222,6,159,

  42. 128,175,192,183,224,42,136,38,136,214,129,33,48,5,60,240,8,56,5,206,130,87,193,69,240,54,120,31,124,12,62,5,95,130,31,

  43. 192,21,240,43,248,19,24,73,162,197,96,57,88,5,242,224,78,176,27,12,131,7,65,9,56,224,56,56,9,78,129,199,192,83,0,101,37,

  44. 148,142,16,138,208,37,148,159,176,45,148,6,139,64,6,100,73,238,193,98,208,165,246,229,102,176,4,116,147,220,143,91,193,

  45. 106,176,134,228,190,240,223,195,168,189,166,228,10,228,152,154,235,4,100,148,65,236,231,105,165,71,233,233,89,200,248,47,

  46. 108,252,23,83,50,247,143,170,60,94,48,229,92,205,3,179,92,201,231,249,62,43,249,53,200,43,148,124,17,242,42,37,191,11,

  47. 121,165,146,63,130,220,171,228,47,32,231,148,252,181,41,215,177,120,78,14,93,42,135,4,170,181,85,212,42,69,247,137,122,

  48. 201,126,82,245,83,168,214,157,196,215,28,19,99,13,172,176,143,248,154,22,137,190,9,253,58,17,51,45,250,9,81,105,222,74,

  49. 125,2,255,214,171,120,36,218,36,109,16,109,156,238,17,241,101,220,20,42,113,187,104,53,186,67,180,58,109,20,45,163,77,

  50. 202,190,89,180,81,218,34,90,131,182,171,252,250,213,184,93,162,53,105,183,26,191,71,237,253,1,177,231,49,149,151,172,185,

  51. 169,106,193,247,171,15,157,109,50,61,113,94,178,170,70,77,251,0,236,35,202,158,82,118,109,142,253,32,236,211,202,206,245,

  52. 157,144,187,83,179,114,111,74,158,201,13,41,238,31,17,250,231,146,114,142,41,198,168,150,211,104,128,38,53,126,66,117,

  53. 120,242,179,118,46,41,207,137,151,209,225,127,8,91,89,235,139,146,198,210,34,119,83,248,92,104,197,208,97,53,104,32,50,

  54. 169,105,136,17,129,149,231,117,49,41,215,121,8,241,107,227,113,210,54,167,17,139,137,92,222,73,202,181,214,50,60,183,149,

  55. 168,79,45,195,207,253,84,198,16,59,25,17,167,154,232,189,164,90,7,246,155,199,229,249,125,152,148,117,24,239,53,104,57,

  56. 171,245,165,104,139,145,162,30,150,197,222,247,176,117,34,183,152,152,39,78,186,170,212,103,173,56,89,68,150,119,211,229,

  57. 57,58,77,100,133,103,86,83,151,153,157,239,251,121,243,117,252,203,124,166,26,115,37,41,239,233,241,45,24,163,241,49,131,

  58. 145,20,237,128,159,155,225,51,165,88,143,150,101,157,184,222,118,189,3,215,117,76,222,227,89,17,167,19,126,188,202,140,

  59. 174,183,205,221,48,121,5,111,60,119,68,172,33,158,154,173,89,206,160,182,223,29,243,250,59,230,245,121,55,138,168,89,220,

  60. 161,186,144,179,226,94,213,148,28,17,109,151,208,102,91,122,93,84,47,218,58,151,89,209,231,232,170,205,170,216,252,126,

  61. 202,42,61,151,155,177,179,202,175,139,204,123,28,215,9,119,19,27,38,99,184,88,44,82,132,95,139,196,10,180,162,80,47,217,

  62. 135,142,88,190,227,206,12,122,110,104,187,225,65,223,107,56,101,219,223,116,212,106,88,196,138,164,193,85,231,254,102,81,

  63. 252,168,183,104,185,101,223,115,202,249,146,28,146,159,55,180,159,86,220,200,101,194,170,212,237,160,159,214,255,195,193,

  64. 183,131,252,158,32,176,195,253,78,197,30,178,131,146,239,212,66,15,177,150,182,92,203,86,104,77,91,129,157,31,172,251,

  65. 129,215,54,77,203,52,106,133,190,115,162,233,144,109,57,184,118,152,63,236,59,115,195,121,65,158,207,53,54,29,216,126,

  66. 131,103,221,59,215,116,208,242,75,118,101,126,50,59,139,37,175,154,247,189,138,147,63,138,210,229,111,92,191,213,77,161,

  67. 153,203,189,255,127,104,123,122,27,254,115,128,126,90,89,44,91,149,134,115,44,111,185,174,23,90,161,227,185,249,125,110,

  68. 169,226,5,220,187,98,5,216,131,158,5,124,134,93,23,25,75,123,239,2,246,81,187,58,173,28,248,54,118,22,249,41,201,87,44,

  69. 119,38,63,54,125,212,46,133,237,186,67,33,207,174,159,210,237,197,160,174,133,86,72,108,130,244,137,97,156,184,137,2,25,

  70. 19,5,33,225,236,77,20,113,112,39,138,5,28,92,126,29,38,54,73,139,167,22,152,37,105,149,74,118,16,236,175,88,51,1,69,248,

  71. 98,109,74,150,188,74,189,234,222,111,85,237,128,150,170,195,198,171,214,204,101,144,187,149,169,167,205,52,55,173,125,13,

  72. 168,105,89,155,253,62,59,196,164,182,85,29,63,89,67,220,155,218,140,99,53,219,229,1,168,179,77,253,64,221,246,79,146,89,

  73. 182,43,118,104,83,196,22,97,151,204,216,225,66,39,141,210,51,237,83,68,209,231,18,25,71,188,32,164,56,191,142,123,135,

  74. 177,66,211,113,145,104,72,70,197,43,29,35,163,106,5,199,40,93,117,170,54,119,71,212,16,149,53,170,94,25,67,93,84,129,98,

  75. 158,59,136,184,200,33,234,185,114,113,29,30,82,110,221,124,240,104,174,192,168,89,225,17,74,212,124,143,239,45,14,0,69,

  76. 142,203,101,224,118,173,87,144,71,128,229,72,75,71,75,220,227,163,254,113,212,54,28,243,203,124,246,240,136,19,144,201,

  77. 175,171,251,200,172,215,202,124,118,189,238,59,252,82,161,72,131,63,21,200,20,77,64,155,244,3,219,215,71,211,27,119,109,

  78. 164,187,40,154,222,53,73,203,140,3,219,7,118,72,213,42,173,111,32,154,158,196,147,24,38,178,244,194,208,190,104,154,30,

  79. 99,90,97,39,20,14,205,176,2,250,227,90,97,20,205,16,156,168,170,21,238,22,166,134,20,138,58,254,116,108,156,26,193,147,

  80. 119,36,50,178,103,104,223,126,97,157,50,10,163,34,150,214,193,70,186,83,90,90,91,107,100,239,94,114,75,83,88,166,45,98,

  81. 35,183,106,221,137,238,36,105,26,195,159,238,103,115,145,211,167,141,75,49,237,81,141,76,246,93,140,171,53,174,142,157,

  82. 57,109,60,30,103,80,39,216,133,56,49,35,110,104,73,232,46,9,93,147,69,236,199,56,99,127,129,139,9,198,62,0,95,129,171,

  83. 224,124,146,177,31,193,75,41,249,110,75,234,89,222,108,155,223,30,252,57,223,252,254,208,105,246,27,196,160,217,239,16,

  84. 222,54,191,69,76,154,253,30,209,51,82,230,127,207,88,78,190,75,15,64,54,115,82,207,223,161,88,70,190,103,139,119,228,156,

  85. 156,151,127,191,232,202,159,191,243,24,57,57,31,127,47,34,53,86,188,123,101,100,174,252,91,233,111,138,244,241,33,100,13,

  86. 0,0};

  87. 

  88. //==============================================================================

  89. #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \

  90.  FIELD (authority, "authority", "Ljava/lang/String;")

  91. 

  92. DECLARE_JNI_CLASS (AndroidProviderInfo, "android/content/pm/ProviderInfo")

  93. #undef JNI_CLASS_MEMBERS

  94. 

  95. #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \

  96.  METHOD (constructor,       "<init>",            "(Landroid/os/ParcelFileDescriptor;JJ)V") \

  97.  METHOD (createInputStream, "createInputStream", "()Ljava/io/FileInputStream;") \

  98.  METHOD (getLength,         "getLength",         "()J")

  99. 

  100. DECLARE_JNI_CLASS (AssetFileDescriptor, "android/content/res/AssetFileDescriptor")

  101. #undef JNI_CLASS_MEMBERS

  102. 

  103. #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \

  104.  METHOD (close, "close", "()V")

  105. 

  106. DECLARE_JNI_CLASS (JavaCloseable, "java/io/Closeable")

  107. #undef JNI_CLASS_MEMBERS

  108. 

  109. #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \

  110.  STATICMETHOD (open, "open", "(Ljava/io/File;I)Landroid/os/ParcelFileDescriptor;")

  111. 

  112. DECLARE_JNI_CLASS (ParcelFileDescriptor, "android/os/ParcelFileDescriptor")

  113. #undef JNI_CLASS_MEMBERS

  114. 

  115. //==============================================================================

  116. class AndroidContentSharerCursor

  117. {

  118. public:

  119.     class Owner

  120.     {

  121.     public:

  122.         virtual ~Owner() {}

  123. 

  124.         virtual void cursorClosed (const AndroidContentSharerCursor&) = 0;

  125.     };

  126. 

  127.     AndroidContentSharerCursor (Owner& ownerToUse, JNIEnv* env,

  128.                                 const LocalRef<jobject>& contentProvider,

  129.                                 const LocalRef<jobjectArray>& resultColumns)

  130.         : owner (ownerToUse),

  131.           cursor (GlobalRef (LocalRef<jobject> (env->NewObject (JuceContentProviderCursor,

  132.                                                                 JuceContentProviderCursor.constructor,

  133.                                                                 contentProvider.get(),

  134.                                                                 reinterpret_cast<jlong> (this),

  135.                                                                 resultColumns.get()))))

  136.     {

  137.         // the content provider must be created first

  138.         jassert (contentProvider.get() != 0);

  139.     }

  140. 

  141.     jobject getNativeCursor() { return cursor.get(); }

  142. 

  143.     void cursorClosed()

  144.     {

  145.         MessageManager::callAsync ([this] { owner.cursorClosed (*this); });

  146.     }

  147. 

  148.     void addRow (LocalRef<jobjectArray>& values)

  149.     {

  150.         auto* env = getEnv();

  151. 

  152.         env->CallVoidMethod (cursor.get(), JuceContentProviderCursor.addRow, values.get());

  153.     }

  154. 

  155. private:

  156.     Owner& owner;

  157.     GlobalRef cursor;

  158. 

  159.     //==============================================================================

  160.     #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \

  161.      METHOD (addRow,      "addRow", "([Ljava/lang/Object;)V") \

  162.      METHOD (constructor, "<init>", "(Lcom/roli/juce/JuceSharingContentProvider;J[Ljava/lang/String;)V") \

  163.      CALLBACK (contentSharerCursorClosed, "contentSharerCursorClosed", "(J)V") \

  164. 

  165.     DECLARE_JNI_CLASS (JuceContentProviderCursor, "com/roli/juce/JuceSharingContentProvider$ProviderCursor")

  166.     #undef JNI_CLASS_MEMBERS

  167. 

  168.     static void JNICALL contentSharerCursorClosed(JNIEnv*, jobject, jlong host)

  169.     {

  170.         if (auto* myself = reinterpret_cast<AndroidContentSharerCursor*> (host))

  171.             myself->cursorClosed();

  172.     }

  173. };

  174. 

  175. AndroidContentSharerCursor::JuceContentProviderCursor_Class AndroidContentSharerCursor::JuceContentProviderCursor;

  176. 

  177. //==============================================================================

  178. class AndroidContentSharerFileObserver

  179. {

  180. public:

  181.     class Owner

  182.     {

  183.     public:

  184.         virtual ~Owner() {}

  185. 

  186.         virtual void fileHandleClosed (const AndroidContentSharerFileObserver&) = 0;

  187.     };

  188. 

  189.     AndroidContentSharerFileObserver (Owner& ownerToUse, JNIEnv* env,

  190.                                       const LocalRef<jobject>& contentProvider,

  191.                                       const String& filepathToUse)

  192.         : owner (ownerToUse),

  193.           filepath (filepathToUse),

  194.           fileObserver (GlobalRef (LocalRef<jobject> (env->NewObject (JuceContentProviderFileObserver,

  195.                                                                       JuceContentProviderFileObserver.constructor,

  196.                                                                       contentProvider.get(),

  197.                                                                       reinterpret_cast<jlong> (this),

  198.                                                                       javaString (filepath).get(),

  199.                                                                       open | access | closeWrite | closeNoWrite))))

  200.     {

  201.         // the content provider must be created first

  202.         jassert (contentProvider.get() != 0);

  203. 

  204.         env->CallVoidMethod (fileObserver, JuceContentProviderFileObserver.startWatching);

  205.     }

  206. 

  207.     void onFileEvent (int event, const LocalRef<jstring>& path)

  208.     {

  209.         ignoreUnused (path);

  210. 

  211.         if (event == open)

  212.         {

  213.             ++numOpenedHandles;

  214.         }

  215.         else if (event == access)

  216.         {

  217.             fileWasRead = true;

  218.         }

  219.         else if (event == closeNoWrite || event == closeWrite)

  220.         {

  221.             --numOpenedHandles;

  222. 

  223.             // numOpenedHandles may get negative if we don't receive open handle event.

  224.             if (fileWasRead && numOpenedHandles <= 0)

  225.             {

  226.                 MessageManager::callAsync ([this]

  227.                 {

  228.                     getEnv()->CallVoidMethod (fileObserver, JuceContentProviderFileObserver.stopWatching);

  229.                     owner.fileHandleClosed (*this);

  230.                 });

  231.             }

  232.         }

  233.     }

  234. 

  235. private:

  236.     static constexpr int open = 32;

  237.     static constexpr int access = 1;

  238.     static constexpr int closeWrite = 8;

  239.     static constexpr int closeNoWrite = 16;

  240. 

  241.     bool fileWasRead = false;

  242.     int numOpenedHandles = 0;

  243. 

  244.     Owner& owner;

  245.     String filepath;

  246.     GlobalRef fileObserver;

  247. 

  248.     //==============================================================================

  249.     #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \

  250.      METHOD (constructor,   "<init>",        "(Lcom/roli/juce/JuceSharingContentProvider;JLjava/lang/String;I)V") \

  251.      METHOD (startWatching, "startWatching", "()V") \

  252.      METHOD (stopWatching,  "stopWatching",  "()V") \

  253.      CALLBACK (contentSharerFileObserverEvent, "contentSharerFileObserverEvent", "(JILjava/lang/String;)V") \

  254. 

  255.     DECLARE_JNI_CLASS (JuceContentProviderFileObserver, "com/roli/juce/JuceSharingContentProvider$ProviderFileObserver")

  256.     #undef JNI_CLASS_MEMBERS

  257. 

  258.     static void JNICALL contentSharerFileObserverEvent (JNIEnv*, jobject /*fileObserver*/, jlong host, int event, jstring path)

  259.     {

  260.         if (auto* myself = reinterpret_cast<AndroidContentSharerFileObserver*> (host))

  261.             myself->onFileEvent (event, LocalRef<jstring> (path));

  262.     }

  263. };

  264. 

  265. AndroidContentSharerFileObserver::JuceContentProviderFileObserver_Class AndroidContentSharerFileObserver::JuceContentProviderFileObserver;

  266. 

  267. //==============================================================================

  268. class AndroidContentSharerPrepareFilesThread    : private Thread

  269. {

  270. public:

  271.     AndroidContentSharerPrepareFilesThread (AsyncUpdater& ownerToUse,

  272.                                             const Array<URL>& fileUrlsToUse,

  273.                                             const String& packageNameToUse,

  274.                                             const String& uriBaseToUse)

  275.         : Thread ("AndroidContentSharerPrepareFilesThread"),

  276.           owner (ownerToUse),

  277.           fileUrls (fileUrlsToUse),

  278.           resultFileUris (GlobalRef (LocalRef<jobject> (getEnv()->NewObject (JavaArrayList,

  279.                                                                              JavaArrayList.constructor,

  280.                                                                              fileUrls.size())))),

  281.           packageName (packageNameToUse),

  282.           uriBase (uriBaseToUse)

  283.     {

  284.         startThread();

  285.     }

  286. 

  287.     ~AndroidContentSharerPrepareFilesThread()

  288.     {

  289.         signalThreadShouldExit();

  290.         waitForThreadToExit (10000);

  291. 

  292.         for (auto& f : temporaryFilesFromAssetFiles)

  293.             f.deleteFile();

  294.     }

  295. 

  296.     jobject getResultFileUris()  { return resultFileUris.get(); }

  297.     const StringArray& getMimeTypes() const { return mimeTypes; }

  298.     const StringArray& getFilePaths() const { return filePaths; }

  299. 

  300. private:

  301.     struct StreamCloser

  302.     {

  303.         StreamCloser (const LocalRef<jobject>& streamToUse)

  304.             : stream (GlobalRef (streamToUse))

  305.         {

  306.         }

  307. 

  308.         ~StreamCloser()

  309.         {

  310.             if (stream.get() != 0)

  311.                 getEnv()->CallVoidMethod (stream, JavaCloseable.close);

  312.         }

  313. 

  314.         GlobalRef stream;

  315.     };

  316. 

  317.     void run() override

  318.     {

  319.         auto* env = getEnv();

  320. 

  321.         bool canSpecifyMimeTypes = true;

  322. 

  323.         for (auto f : fileUrls)

  324.         {

  325.             auto scheme = f.getScheme();

  326. 

  327.             // Only "file://" scheme or no scheme (for files in app bundle) are allowed!

  328.             jassert (scheme.isEmpty() || scheme == "file");

  329. 

  330.             if (scheme.isEmpty())

  331.             {

  332.                 // Raw resource names need to be all lower case

  333.                 jassert (f.toString (true).toLowerCase() == f.toString (true));

  334. 

  335.                 // This will get us a file with file:// URI

  336.                 f = copyAssetFileToTemporaryFile (env, f.toString (true));

  337. 

  338.                 if (f.isEmpty())

  339.                     continue;

  340.             }

  341. 

  342.             if (threadShouldExit())

  343.                 return;

  344. 

  345.             auto filepath = URL::removeEscapeChars (f.toString (true).fromFirstOccurrenceOf ("file://", false, false));

  346. 

  347.             filePaths.add (filepath);

  348. 

  349.             auto filename = filepath.fromLastOccurrenceOf ("/", false, true);

  350.             auto fileExtension = filename.fromLastOccurrenceOf (".", false, true);

  351.             auto contentString = uriBase + String (filePaths.size() - 1) + "/" + filename;

  352. 

  353.             auto uri = LocalRef<jobject> (env->CallStaticObjectMethod (AndroidUri, AndroidUri.parse,

  354.                                                                        javaString (contentString).get()));

  355. 

  356.             if (canSpecifyMimeTypes)

  357.                 canSpecifyMimeTypes = fileExtension.isNotEmpty();

  358. 

  359.             if (canSpecifyMimeTypes)

  360.                 mimeTypes.addArray (getMimeTypesForFileExtension (fileExtension));

  361.             else

  362.                 mimeTypes.clear();

  363. 

  364.             env->CallBooleanMethod (resultFileUris, JavaArrayList.add, uri.get());

  365.         }

  366. 

  367.         owner.triggerAsyncUpdate();

  368.     }

  369. 

  370.     URL copyAssetFileToTemporaryFile (JNIEnv* env, const String& filename)

  371.     {

  372.         auto resources = LocalRef<jobject> (env->CallObjectMethod (getAppContext().get(), AndroidContext.getResources));

  373.         int fileId = env->CallIntMethod (resources, AndroidResources.getIdentifier, javaString (filename).get(),

  374.                                          javaString ("raw").get(), javaString (packageName).get());

  375. 

  376.         // Raw resource not found. Please make sure that you include your file as a raw resource

  377.         // and that you specify just the file name, without an extension.

  378.         jassert (fileId != 0);

  379. 

  380.         if (fileId == 0)

  381.             return {};

  382. 

  383.         auto assetFd = LocalRef<jobject> (env->CallObjectMethod (resources,

  384.                                                                  AndroidResources.openRawResourceFd,

  385.                                                                  fileId));

  386. 

  387.         auto inputStream = StreamCloser (LocalRef<jobject> (env->CallObjectMethod (assetFd,

  388.                                                                                    AssetFileDescriptor.createInputStream)));

  389. 

  390.         if (jniCheckHasExceptionOccurredAndClear())

  391.         {

  392.             // Failed to open file stream for resource

  393.             jassertfalse;

  394.             return {};

  395.         }

  396. 

  397.         auto tempFile = File::createTempFile ({});

  398.         tempFile.createDirectory();

  399.         tempFile = tempFile.getChildFile (filename);

  400. 

  401.         auto outputStream = StreamCloser (LocalRef<jobject> (env->NewObject (JavaFileOutputStream,

  402.                                                                              JavaFileOutputStream.constructor,

  403.                                                                              javaString (tempFile.getFullPathName()).get())));

  404. 

  405.         if (jniCheckHasExceptionOccurredAndClear())

  406.         {

  407.             // Failed to open file stream for temporary file

  408.             jassertfalse;

  409.             return {};

  410.         }

  411. 

  412.         auto buffer = LocalRef<jbyteArray> (env->NewByteArray (1024));

  413.         int bytesRead = 0;

  414. 

  415.         for (;;)

  416.         {

  417.             if (threadShouldExit())

  418.                 return {};

  419. 

  420.             bytesRead = env->CallIntMethod (inputStream.stream, JavaFileInputStream.read, buffer.get());

  421. 

  422.             if (jniCheckHasExceptionOccurredAndClear())

  423.             {

  424.                 // Failed to read from resource file.

  425.                 jassertfalse;

  426.                 return {};

  427.             }

  428. 

  429.             if (bytesRead < 0)

  430.                 break;

  431. 

  432.             env->CallVoidMethod (outputStream.stream, JavaFileOutputStream.write, buffer.get(), 0, bytesRead);

  433. 

  434.             if (jniCheckHasExceptionOccurredAndClear())

  435.             {

  436.                 // Failed to write to temporary file.

  437.                 jassertfalse;

  438.                 return {};

  439.             }

  440.         }

  441. 

  442.         temporaryFilesFromAssetFiles.add (tempFile);

  443. 

  444.         return URL (tempFile);

  445.     }

  446. 

  447.     AsyncUpdater& owner;

  448.     Array<URL> fileUrls;

  449. 

  450.     GlobalRef resultFileUris;

  451.     String packageName;

  452.     String uriBase;

  453. 

  454.     StringArray filePaths;

  455.     Array<File> temporaryFilesFromAssetFiles;

  456.     StringArray mimeTypes;

  457. };

  458. 

  459. //==============================================================================

  460. class ContentSharer::ContentSharerNativeImpl  : public ContentSharer::Pimpl,

  461.                                                 public AndroidContentSharerFileObserver::Owner,

  462.                                                 public AndroidContentSharerCursor::Owner,

  463.                                                 public AsyncUpdater,

  464.                                                 private Timer

  465. {

  466. public:

  467.     ContentSharerNativeImpl (ContentSharer& cs)

  468.         : owner (cs),

  469.           packageName (juceString (LocalRef<jstring> ((jstring) getEnv()->CallObjectMethod (getAppContext().get(), AndroidContext.getPackageName)))),

  470.           uriBase ("content://" + packageName + ".sharingcontentprovider/")

  471.     {

  472.     }

  473. 

  474.     ~ContentSharerNativeImpl()

  475.     {

  476.         masterReference.clear();

  477.     }

  478. 

  479.     void shareFiles (const Array<URL>& files) override

  480.     {

  481.         if (! isContentSharingEnabled())

  482.         {

  483.             // You need to enable "Content Sharing" in Projucer's Android exporter.

  484.             jassertfalse;

  485.             owner.sharingFinished (false, {});

  486.         }

  487. 

  488.         prepareFilesThread.reset (new AndroidContentSharerPrepareFilesThread (*this, files, packageName, uriBase));

  489.     }

  490. 

  491.     void shareText (const String& text) override

  492.     {

  493.         if (! isContentSharingEnabled())

  494.         {

  495.             // You need to enable "Content Sharing" in Projucer's Android exporter.

  496.             jassertfalse;

  497.             owner.sharingFinished (false, {});

  498.         }

  499. 

  500.         auto* env = getEnv();

  501. 

  502.         auto intent = LocalRef<jobject> (env->NewObject (AndroidIntent, AndroidIntent.constructor));

  503.         env->CallObjectMethod (intent, AndroidIntent.setAction,

  504.                                javaString ("android.intent.action.SEND").get());

  505.         env->CallObjectMethod (intent, AndroidIntent.putExtra,

  506.                                javaString ("android.intent.extra.TEXT").get(),

  507.                                javaString (text).get());

  508.         env->CallObjectMethod (intent, AndroidIntent.setType, javaString ("text/plain").get());

  509. 

  510.         auto chooserIntent = LocalRef<jobject> (env->CallStaticObjectMethod (AndroidIntent, AndroidIntent.createChooser,

  511.                                                                              intent.get(), javaString ("Choose share target").get()));

  512. 

  513.         WeakReference<ContentSharerNativeImpl> weakRef (this);

  514. 

  515.         startAndroidActivityForResult (chooserIntent, 1003,

  516.                                        [weakRef] (int /*requestCode*/, int resultCode, LocalRef<jobject> /*intentData*/) mutable

  517.                                        {

  518.                                            if (weakRef != nullptr)

  519.                                                weakRef->sharingFinished (resultCode);

  520.                                        });

  521.     }

  522. 

  523.     //==============================================================================

  524.     void cursorClosed (const AndroidContentSharerCursor& cursor) override

  525.     {

  526.         cursors.removeObject (&cursor);

  527.     }

  528. 

  529.     void fileHandleClosed (const AndroidContentSharerFileObserver&) override

  530.     {

  531.         decrementPendingFileCountAndNotifyOwnerIfReady();

  532.     }

  533. 

  534.     //==============================================================================

  535.     jobject openFile (const LocalRef<jobject>& contentProvider,

  536.                     const LocalRef<jobject>& uri, const LocalRef<jstring>& mode)

  537.     {

  538.         ignoreUnused (mode);

  539. 

  540.         WeakReference<ContentSharerNativeImpl> weakRef (this);

  541. 

  542.         if (weakRef == nullptr)

  543.             return nullptr;

  544. 

  545.         auto* env = getEnv();

  546. 

  547.         auto uriElements = getContentUriElements (env, uri);

  548. 

  549.         if (uriElements.filepath.isEmpty())

  550.             return nullptr;

  551. 

  552.         return getAssetFileDescriptor (env, contentProvider, uriElements.filepath);

  553.     }

  554. 

  555.     jobject query (const LocalRef<jobject>& contentProvider, const LocalRef<jobject>& uri,

  556.                  const LocalRef<jobjectArray>& projection, const LocalRef<jobject>& selection,

  557.                  const LocalRef<jobjectArray>& selectionArgs, const LocalRef<jobject>& sortOrder)

  558.     {

  559.         ignoreUnused (selection, selectionArgs, sortOrder);

  560. 

  561.         StringArray requestedColumns = javaStringArrayToJuce (projection);

  562.         StringArray supportedColumns = getSupportedColumns();

  563. 

  564.         StringArray resultColumns;

  565. 

  566.         for (const auto& col : supportedColumns)

  567.         {

  568.             if (requestedColumns.contains (col))

  569.                 resultColumns.add (col);

  570.         }

  571. 

  572.         // Unsupported columns were queried, file sharing may fail.

  573.         if (resultColumns.isEmpty())

  574.             return nullptr;

  575. 

  576.         auto resultJavaColumns = juceStringArrayToJava (resultColumns);

  577. 

  578.         auto* env = getEnv();

  579. 

  580.         auto cursor = cursors.add (new AndroidContentSharerCursor (*this, env, contentProvider,

  581.                                                                    resultJavaColumns));

  582. 

  583.         auto uriElements = getContentUriElements (env, uri);

  584. 

  585.         if (uriElements.filepath.isEmpty())

  586.             return cursor->getNativeCursor();

  587. 

  588.         auto values = LocalRef<jobjectArray> (env->NewObjectArray ((jsize) resultColumns.size(),

  589.                                                                    JavaObject, 0));

  590. 

  591.         for (int i = 0; i < resultColumns.size(); ++i)

  592.         {

  593.             if (resultColumns.getReference (i) == "_display_name")

  594.             {

  595.                 env->SetObjectArrayElement (values, i, javaString (uriElements.filename).get());

  596.             }

  597.             else if (resultColumns.getReference (i) == "_size")

  598.             {

  599.                 auto javaFile = LocalRef<jobject> (env->NewObject (JavaFile, JavaFile.constructor,

  600.                                                                    javaString (uriElements.filepath).get()));

  601. 

  602.                 jlong fileLength = env->CallLongMethod (javaFile, JavaFile.length);

  603. 

  604.                 env->SetObjectArrayElement (values, i, env->NewObject (JavaLong,

  605.                                                                        JavaLong.constructor,

  606.                                                                        fileLength));

  607.             }

  608.         }

  609. 

  610.         cursor->addRow (values);

  611.         return cursor->getNativeCursor();

  612.     }

  613. 

  614.     jobjectArray getStreamTypes (const LocalRef<jobject>& uri, const LocalRef<jstring>& mimeTypeFilter)

  615.     {

  616.         auto* env = getEnv();

  617. 

  618.         auto extension = getContentUriElements (env, uri).filename.fromLastOccurrenceOf (".", false, true);

  619. 

  620.         if (extension.isEmpty())

  621.             return nullptr;

  622. 

  623.         return juceStringArrayToJava (filterMimeTypes (getMimeTypesForFileExtension (extension),

  624.                                                                   juceString (mimeTypeFilter.get())));

  625.     }

  626. 

  627.     void sharingFinished (int resultCode)

  628.     {

  629.         sharingActivityDidFinish = true;

  630. 

  631.         succeeded = resultCode == -1;

  632. 

  633.         // Give content sharer a chance to request file access.

  634.         if (nonAssetFilesPendingShare.get() == 0)

  635.             startTimer (2000);

  636.         else

  637.             notifyOwnerIfReady();

  638.     }

  639. 

  640. private:

  641.     bool isContentSharingEnabled() const

  642.     {

  643.         auto* env = getEnv();

  644. 

  645.         LocalRef<jobject> packageManager (env->CallObjectMethod (getAppContext().get(), AndroidContext.getPackageManager));

  646. 

  647.         constexpr int getProviders = 8;

  648.         auto packageInfo = LocalRef<jobject> (env->CallObjectMethod (packageManager,

  649.                                                                      AndroidPackageManager.getPackageInfo,

  650.                                                                      javaString (packageName).get(),

  651.                                                                      getProviders));

  652.         auto providers = LocalRef<jobjectArray> ((jobjectArray) env->GetObjectField (packageInfo,

  653.                                                                                      AndroidPackageInfo.providers));

  654. 

  655.         if (providers == nullptr)

  656.             return false;

  657. 

  658.         auto sharingContentProviderAuthority = packageName + ".sharingcontentprovider";

  659.         const int numProviders = env->GetArrayLength (providers.get());

  660. 

  661.         for (int i = 0; i < numProviders; ++i)

  662.         {

  663.             auto providerInfo = LocalRef<jobject> (env->GetObjectArrayElement (providers, i));

  664.             auto authority = LocalRef<jstring> ((jstring) env->GetObjectField (providerInfo,

  665.                                                                                AndroidProviderInfo.authority));

  666. 

  667.             if (juceString (authority) == sharingContentProviderAuthority)

  668.                 return true;

  669.         }

  670. 

  671.         return false;

  672.     }

  673. 

  674.     void handleAsyncUpdate() override

  675.     {

  676.         jassert (prepareFilesThread != nullptr);

  677. 

  678.         if (prepareFilesThread == nullptr)

  679.             return;

  680. 

  681.         filesPrepared (prepareFilesThread->getResultFileUris(), prepareFilesThread->getMimeTypes());

  682.     }

  683. 

  684.     void filesPrepared (jobject fileUris, const StringArray& mimeTypes)

  685.     {

  686.         auto* env = getEnv();

  687. 

  688.         auto intent = LocalRef<jobject> (env->NewObject (AndroidIntent, AndroidIntent.constructor));

  689.         env->CallObjectMethod (intent, AndroidIntent.setAction,

  690.                                javaString ("android.intent.action.SEND_MULTIPLE").get());

  691. 

  692.         env->CallObjectMethod (intent, AndroidIntent.setType,

  693.                                javaString (getCommonMimeType (mimeTypes)).get());

  694. 

  695.         constexpr int grantReadPermission = 1;

  696.         env->CallObjectMethod (intent, AndroidIntent.setFlags, grantReadPermission);

  697. 

  698.         env->CallObjectMethod (intent, AndroidIntent.putParcelableArrayListExtra,

  699.                                javaString ("android.intent.extra.STREAM").get(),

  700.                                fileUris);

  701. 

  702.         auto chooserIntent = LocalRef<jobject> (env->CallStaticObjectMethod (AndroidIntent,

  703.                                                                              AndroidIntent.createChooser,

  704.                                                                              intent.get(),

  705.                                                                              javaString ("Choose share target").get()));

  706.         WeakReference<ContentSharerNativeImpl> weakRef (this);

  707. 

  708.         startAndroidActivityForResult (chooserIntent, 1003,

  709.                                        [weakRef] (int /*requestCode*/, int resultCode, LocalRef<jobject> /*intentData*/) mutable

  710.                                        {

  711.                                            if (weakRef != nullptr)

  712.                                                weakRef->sharingFinished (resultCode);

  713.                                        });

  714.     }

  715. 

  716.     void decrementPendingFileCountAndNotifyOwnerIfReady()

  717.     {

  718.         --nonAssetFilesPendingShare;

  719. 

  720.         notifyOwnerIfReady();

  721.     }

  722. 

  723.     void notifyOwnerIfReady()

  724.     {

  725.         if (sharingActivityDidFinish && nonAssetFilesPendingShare.get() == 0)

  726.             owner.sharingFinished (succeeded, {});

  727.     }

  728. 

  729.     void timerCallback() override

  730.     {

  731.         stopTimer();

  732. 

  733.         notifyOwnerIfReady();

  734.     }

  735. 

  736.     //==============================================================================

  737.     struct ContentUriElements

  738.     {

  739.         String index;

  740.         String filename;

  741.         String filepath;

  742.     };

  743. 

  744.     ContentUriElements getContentUriElements (JNIEnv* env, const LocalRef<jobject>& uri) const

  745.     {

  746.         jassert (prepareFilesThread != nullptr);

  747. 

  748.         if (prepareFilesThread == nullptr)

  749.             return {};

  750. 

  751.         auto fullUri = juceString ((jstring) env->CallObjectMethod (uri.get(), AndroidUri.toString));

  752. 

  753.         auto index = fullUri.fromFirstOccurrenceOf (uriBase, false, false)

  754.                              .upToFirstOccurrenceOf ("/", false, true);

  755. 

  756.         auto filename = fullUri.fromLastOccurrenceOf ("/", false, true);

  757. 

  758.         return { index, filename, prepareFilesThread->getFilePaths()[index.getIntValue()] };

  759.     }

  760. 

  761.     static StringArray getSupportedColumns()

  762.     {

  763.         return StringArray ("_display_name", "_size");

  764.     }

  765. 

  766.     jobject getAssetFileDescriptor (JNIEnv* env, const LocalRef<jobject>& contentProvider,

  767.                                   const String& filepath)

  768.     {

  769.         // This function can be called from multiple threads.

  770.         {

  771.             const ScopedLock sl (nonAssetFileOpenLock);

  772. 

  773.             if (! nonAssetFilePathsPendingShare.contains (filepath))

  774.             {

  775.                 nonAssetFilePathsPendingShare.add (filepath);

  776.                 ++nonAssetFilesPendingShare;

  777. 

  778.                 nonAssetFileObservers.add (new AndroidContentSharerFileObserver (*this, env,

  779.                                                                                  contentProvider,

  780.                                                                                  filepath));

  781.             }

  782.         }

  783. 

  784.         auto javaFile = LocalRef<jobject> (env->NewObject (JavaFile, JavaFile.constructor,

  785.                                                            javaString (filepath).get()));

  786. 

  787.         constexpr int modeReadOnly = 268435456;

  788.         auto parcelFileDescriptor = LocalRef<jobject> (env->CallStaticObjectMethod (ParcelFileDescriptor,

  789.                                                                                     ParcelFileDescriptor.open,

  790.                                                                                     javaFile.get(), modeReadOnly));

  791. 

  792.         if (jniCheckHasExceptionOccurredAndClear())

  793.         {

  794.             // Failed to create file descriptor. Have you provided a valid file path/resource name?

  795.             jassertfalse;

  796.             return nullptr;

  797.         }

  798. 

  799.         jlong startOffset = 0;

  800.         jlong unknownLength = -1;

  801. 

  802.         assetFileDescriptors.add (GlobalRef (LocalRef<jobject> (env->NewObject (AssetFileDescriptor,

  803.                                                                                 AssetFileDescriptor.constructor,

  804.                                                                                 parcelFileDescriptor.get(),

  805.                                                                                 startOffset, unknownLength))));

  806. 

  807.         return assetFileDescriptors.getReference (assetFileDescriptors.size() - 1).get();

  808.     }

  809. 

  810.     ContentSharer& owner;

  811.     String packageName;

  812.     String uriBase;

  813. 

  814.     std::unique_ptr<AndroidContentSharerPrepareFilesThread> prepareFilesThread;

  815. 

  816.     bool succeeded = false;

  817.     String errorDescription;

  818. 

  819.     bool sharingActivityDidFinish = false;

  820. 

  821.     OwnedArray<AndroidContentSharerCursor> cursors;

  822. 

  823.     Array<GlobalRef> assetFileDescriptors;

  824. 

  825.     CriticalSection nonAssetFileOpenLock;

  826.     StringArray nonAssetFilePathsPendingShare;

  827.     Atomic<int> nonAssetFilesPendingShare { 0 };

  828.     OwnedArray<AndroidContentSharerFileObserver> nonAssetFileObservers;

  829. 

  830.     WeakReference<ContentSharerNativeImpl>::Master masterReference;

  831.     friend class WeakReference<ContentSharerNativeImpl>;

  832. 

  833.     //==============================================================================

  834.     #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \

  835.      CALLBACK (contentSharerQuery,          "contentSharerQuery",          "(Landroid/net/Uri;[Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)Landroid/database/Cursor;") \

  836.      CALLBACK (contentSharerOpenFile,       "contentSharerOpenFile",       "(Landroid/net/Uri;Ljava/lang/String;)Landroid/content/res/AssetFileDescriptor;") \

  837.      CALLBACK (contentSharerGetStreamTypes, "contentSharerGetStreamTypes", "(Landroid/net/Uri;Ljava/lang/String;)[Ljava/lang/String;") \

  838. 

  839. 

  840.     DECLARE_JNI_CLASS_WITH_BYTECODE (JuceSharingContentProvider, "com/roli/juce/JuceSharingContentProvider", 16, javaJuceSharingContentProvider, sizeof(javaJuceSharingContentProvider))

  841.     #undef JNI_CLASS_MEMBERS

  842. 

  843.     static jobject JNICALL contentSharerQuery (JNIEnv*, jobject contentProvider, jobject uri, jobjectArray projection,

  844.                                                jobject selection, jobjectArray selectionArgs, jobject sortOrder)

  845.     {

  846.         if (auto *pimpl = (ContentSharer::ContentSharerNativeImpl *) ContentSharer::getInstance ()->pimpl.get ())

  847.             return pimpl->query (LocalRef<jobject> (static_cast<jobject> (contentProvider)),

  848.                                  LocalRef<jobject> (static_cast<jobject> (uri)),

  849.                                  LocalRef<jobjectArray> (

  850.                                          static_cast<jobjectArray> (projection)),

  851.                                  LocalRef<jobject> (static_cast<jobject> (selection)),

  852.                                  LocalRef<jobjectArray> (

  853.                                          static_cast<jobjectArray> (selectionArgs)),

  854.                                  LocalRef<jobject> (static_cast<jobject> (sortOrder)));

  855. 

  856.         return nullptr;

  857.     }

  858. 

  859.     static jobject JNICALL contentSharerOpenFile (JNIEnv*, jobject contentProvider, jobject uri, jstring mode)

  860.     {

  861.         if (auto* pimpl = (ContentSharer::ContentSharerNativeImpl*) ContentSharer::getInstance()->pimpl.get())

  862.             return pimpl->openFile (LocalRef<jobject> (static_cast<jobject> (contentProvider)),

  863.                                     LocalRef<jobject> (static_cast<jobject> (uri)),

  864.                                     LocalRef<jstring> (static_cast<jstring> (mode)));

  865. 

  866.         return nullptr;

  867.     }

  868. 

  869.     static jobjectArray JNICALL contentSharerGetStreamTypes (JNIEnv*, jobject /*contentProvider*/, jobject uri, jstring mimeTypeFilter)

  870.     {

  871.         if (auto* pimpl = (ContentSharer::ContentSharerNativeImpl*) ContentSharer::getInstance()->pimpl.get())

  872.             return pimpl->getStreamTypes (LocalRef<jobject> (static_cast<jobject> (uri)),

  873.                                           LocalRef<jstring> (static_cast<jstring> (mimeTypeFilter)));

  874. 

  875.         return nullptr;

  876.     }

  877. };

  878. 

  879. //==============================================================================

  880. ContentSharer::Pimpl* ContentSharer::createPimpl()

  881. {

  882.     return new ContentSharerNativeImpl (*this);

  883. }

  884. 

  885. ContentSharer::ContentSharerNativeImpl::JuceSharingContentProvider_Class ContentSharer::ContentSharerNativeImpl::JuceSharingContentProvider;

  886. 

  887. } // namespace juce