Carla/source/modules/juce_gui_extra/native/juce_android_WebBrowserComponent.cpp

/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

//==============================================================================
// This byte-code is generated from native/java/com/rmsl/juce/JuceWebView.java with min sdk version 16
// See juce_core/native/java/README.txt on how to generate this byte-code.
static const unsigned char JuceWebView16ByteCode[] =
{31,139,8,8,150,114,161,94,0,3,74,117,99,101,87,101,98,86,105,101,119,49,54,66,121,116,101,67,111,100,101,46,100,101,120,0,125,
150,93,108,20,85,20,199,207,124,236,78,119,218,110,183,5,74,191,40,109,69,168,72,89,176,162,165,11,88,40,159,101,81,161,88,226,
106,34,211,221,107,59,101,118,102,153,153,109,27,67,16,161,137,134,240,96,4,222,72,140,9,18,35,62,18,195,131,15,4,53,250,226,155,
209,23,30,212,4,195,131,15,198,24,98,20,19,255,119,238,221,101,129,226,110,126,123,206,61,231,220,123,207,189,247,236,204,
45,176,121,115,195,224,38,242,254,253,180,235,204,157,47,183,223,188,240,115,199,231,119,79,174,251,240,23,243,246,209,206,219,
79,221,168,39,42,17,209,252,196,179,45,36,63,247,76,162,17,18,246,165,92,42,68,141,144,55,32,117,200,215,85,162,37,144,39,32,
53,30,131,159,108,29,81,8,217,16,71,27,244,129,181,96,0,188,0,118,130,55,192,9,240,1,184,6,126,0,247,64,171,65,244,28,56,10,22,
192,71,224,107,112,27,212,97,220,149,96,16,236,1,99,224,69,48,14,94,5,71,65,1,216,192,3,62,152,7,111,131,115,224,60,184,4,62,
6,87,193,117,112,19,124,7,126,4,191,130,223,192,63,160,62,65,212,9,214,130,109,96,31,176,64,17,204,131,147,224,12,56,11,222,7,87,
193,55,224,39,240,23,104,54,197,126,96,73,132,212,9,67,18,204,4,51,97,155,169,129,196,62,38,65,19,72,129,102,192,55,126,137,
220,235,101,160,21,44,7,43,65,76,142,119,57,38,108,149,67,106,147,250,103,176,183,75,253,26,244,78,169,127,1,189,67,234,223,66,
239,146,250,247,208,187,165,126,11,250,10,169,95,174,177,223,169,209,255,132,222,35,243,227,227,244,74,157,39,197,215,182,58,
90,99,138,250,229,58,87,71,82,180,99,164,144,8,53,35,89,39,219,9,82,165,140,211,64,36,27,104,125,36,53,26,150,50,19,141,35,226,
76,244,91,19,201,58,74,71,50,65,27,34,105,208,70,57,239,96,36,99,180,37,146,245,180,53,146,58,109,139,246,94,204,155,170,206,
79,145,22,147,123,201,107,58,68,227,138,72,51,26,79,145,231,87,241,47,192,255,149,244,215,75,127,170,198,127,1,254,63,164,159,
103,189,0,253,172,121,95,63,111,138,62,151,76,30,175,69,122,187,41,234,161,148,226,190,62,140,87,74,241,61,127,45,165,80,174,
69,212,137,142,17,248,248,171,77,81,7,227,56,140,210,72,156,212,141,73,172,62,22,249,6,76,81,111,194,103,192,215,18,213,87,101,
158,231,171,243,168,15,205,163,97,30,53,154,71,156,149,66,59,77,81,167,135,183,107,180,66,105,69,250,185,29,42,117,43,73,140,
208,173,172,145,245,168,224,155,192,156,90,212,62,96,138,122,30,31,81,137,247,192,153,168,155,225,75,70,150,210,68,146,244,131,
253,127,243,253,212,163,248,9,83,172,173,54,126,8,163,137,232,38,68,39,177,199,122,180,222,163,166,168,183,241,210,35,99,251,
42,25,199,141,5,227,162,113,101,54,206,207,182,255,46,63,27,158,147,74,51,232,247,4,175,97,229,240,105,172,68,29,95,64,127,12,
184,81,211,227,67,90,3,241,118,41,215,68,123,47,154,52,132,185,186,213,102,165,91,237,83,227,212,161,109,194,46,42,244,76,179,
209,219,127,183,17,214,53,242,185,183,4,115,244,70,187,196,191,61,82,226,89,99,10,191,216,213,100,244,28,172,253,156,122,168,125,
238,161,54,175,17,3,79,2,165,166,205,45,122,85,170,164,73,189,89,214,30,63,111,173,234,173,232,98,12,174,55,227,219,36,107,
211,64,230,75,96,141,111,177,93,59,220,70,13,163,211,190,87,100,163,142,205,220,144,226,82,42,99,148,26,43,231,217,17,54,57,97,
179,185,245,51,214,172,69,90,54,155,165,246,172,229,22,124,207,46,164,167,124,171,52,109,231,131,244,14,59,44,90,165,12,117,
86,93,46,11,211,211,97,88,74,143,7,206,46,223,247,252,12,45,173,58,189,32,125,128,5,129,53,197,50,212,83,181,206,177,201,99,118,
88,237,176,23,118,135,249,139,68,32,165,218,148,51,180,106,145,136,67,44,240,202,126,158,65,150,60,55,192,76,109,139,68,241,
165,101,168,251,49,158,202,248,253,217,188,87,76,251,197,192,73,207,96,75,210,53,251,178,234,193,76,250,254,47,82,198,116,62,62,
134,15,80,176,156,89,251,88,218,114,93,47,180,66,219,115,211,187,220,188,227,5,182,59,53,234,88,65,192,211,125,52,102,159,
235,50,95,250,123,23,241,31,96,197,73,25,192,16,178,44,203,207,51,109,123,232,88,42,135,227,161,207,172,98,134,90,132,217,177,
220,169,244,75,147,51,44,31,62,104,67,28,210,200,144,50,65,234,196,24,105,19,99,89,210,241,147,165,24,255,205,194,154,133,53,
203,173,188,169,228,72,207,69,238,92,54,151,203,82,189,149,207,227,224,119,59,214,84,64,49,198,143,153,140,55,173,89,59,239,185,
100,76,139,19,39,125,218,11,66,170,231,191,59,153,195,66,86,160,58,222,200,122,249,99,148,224,218,97,239,149,128,81,157,29,
236,180,45,199,155,162,70,59,128,193,223,195,130,176,236,51,210,93,171,200,168,209,115,71,177,111,236,136,237,22,188,57,74,162,
137,85,134,53,237,151,81,129,187,241,39,8,166,49,69,163,104,143,135,150,207,103,108,241,220,67,44,207,236,89,86,168,84,36,37,
124,22,148,157,240,64,48,69,173,193,180,87,118,10,251,220,144,161,200,74,225,33,118,188,140,217,201,20,246,172,103,21,40,17,178,
121,254,47,40,58,164,135,211,118,64,90,217,119,40,54,107,57,101,228,56,139,243,166,246,185,74,165,85,19,173,140,212,81,113,
213,36,93,241,45,151,62,158,48,159,170,186,136,214,135,28,149,213,84,58,60,178,164,248,156,216,13,71,89,107,36,213,229,25,117,
102,110,128,2,101,196,72,230,232,45,125,248,233,117,131,92,27,136,188,155,51,234,94,120,7,201,72,110,221,223,221,69,25,117,120,
200,72,158,237,162,253,218,240,208,147,70,242,221,28,141,106,195,171,87,69,182,131,220,185,98,235,123,51,26,109,90,58,208,27,163,
206,149,231,113,13,48,146,164,54,40,67,109,245,106,163,218,167,39,214,45,87,42,138,170,38,149,161,46,181,45,209,134,23,189,
166,146,170,180,104,239,156,210,47,24,218,105,188,167,128,174,220,48,20,229,22,94,104,122,76,133,183,14,222,123,70,92,122,57,9,
229,147,58,68,128,115,9,69,185,14,126,79,240,231,99,51,34,111,153,149,247,179,82,35,71,72,220,107,249,51,179,114,183,229,207,
203,218,251,109,229,142,27,163,251,247,220,56,221,191,235,106,41,161,243,231,188,210,35,238,11,23,160,199,123,164,29,29,149,148,
176,243,123,149,218,35,230,229,119,99,77,198,243,119,191,222,35,239,22,220,32,251,70,119,144,148,200,149,223,195,255,3,213,
111,243,3,192,11,0,0,0,0};

//==============================================================================
// This byte-code is generated from native/javacore/app/com/rmsl/juce/JuceWebView21.java with min sdk version 21
// See juce_core/native/java/README.txt on how to generate this byte-code.
static const unsigned char JuceWebView21ByteCode[] =
{31,139,8,8,45,103,161,94,0,3,74,117,99,101,87,101,98,86,105,101,119,50,49,46,100,101,120,0,141,151,93,140,27,87,21,199,207,
204,216,30,219,99,59,182,55,251,145,143,221,110,210,173,178,105,154,186,155,164,52,169,211,106,241,38,219,221,48,41,52,155,108,
138,43,85,154,181,47,235,73,188,51,206,204,120,119,65,162,132,80,148,138,34,148,168,20,181,125,129,135,16,129,4,18,168,125,136,
42,224,133,207,74,60,160,138,135,208,71,210,151,162,128,242,148,86,136,7,254,247,99,28,111,18,34,108,253,124,206,61,231,220,
143,115,239,153,241,76,147,173,103,159,216,255,36,253,228,121,251,31,197,127,189,252,251,226,31,94,89,242,217,87,31,123,227,
151,175,95,184,28,222,168,188,152,39,234,16,209,250,226,129,50,169,207,247,115,68,243,36,237,67,188,173,17,149,32,111,66,38,32,
175,233,68,195,144,215,33,13,200,75,248,105,101,136,110,65,222,74,17,125,6,82,38,81,1,148,192,35,96,18,236,5,115,224,37,176,14,
190,7,126,1,62,4,159,130,209,52,209,83,224,52,248,22,248,41,248,19,184,9,114,24,191,2,102,65,29,120,224,28,232,130,175,129,
243,224,34,120,29,92,2,63,0,111,131,31,130,171,224,93,240,62,248,0,124,8,62,2,55,192,39,224,54,160,44,145,5,6,193,4,120,20,28,
2,243,224,203,160,5,190,14,46,131,119,192,143,193,175,193,7,224,175,224,35,240,49,248,4,220,2,183,65,201,66,206,96,22,188,12,
214,193,101,75,238,25,210,37,164,69,106,106,130,153,176,237,132,227,160,2,216,4,138,36,247,157,31,204,0,216,12,6,213,153,240,
253,31,1,91,192,86,176,19,36,129,174,206,48,165,198,111,165,164,125,64,217,183,170,113,248,103,155,210,59,136,217,174,244,117,
232,99,74,63,223,167,127,23,250,168,210,223,130,254,144,210,175,64,223,161,244,159,245,233,215,160,143,43,253,119,125,246,63,
247,233,215,161,63,172,114,226,99,78,40,253,227,148,220,143,61,98,95,202,180,87,237,205,30,33,101,91,199,247,89,145,167,33,114,
225,251,185,91,228,92,16,237,172,178,91,162,98,185,204,208,62,33,139,180,95,200,36,213,148,156,17,227,202,184,28,250,61,38,100,
142,14,8,153,167,39,133,180,232,115,66,102,233,41,33,53,122,90,200,52,29,17,114,19,29,21,210,164,89,33,83,244,156,56,79,185,
142,114,111,61,132,158,242,124,248,135,207,122,16,141,253,57,82,243,75,127,182,207,63,7,255,11,202,159,87,254,114,159,255,69,
248,47,42,63,63,255,18,244,225,220,29,125,60,39,251,236,206,241,120,67,232,111,91,114,172,78,81,67,123,39,198,235,20,121,93,189,
132,118,189,44,107,48,129,17,248,248,87,45,185,222,5,28,104,103,58,77,250,84,1,89,38,133,239,231,150,220,123,233,203,192,87,22,
181,27,207,115,173,55,79,226,174,121,12,204,163,139,121,146,34,82,163,63,90,50,255,147,159,55,104,84,27,194,242,235,53,157,
198,180,2,70,24,211,118,137,58,78,17,95,111,6,115,26,162,253,23,75,94,43,11,211,58,241,30,83,72,251,16,124,5,97,233,44,150,40,
241,194,228,191,121,93,36,68,252,223,44,153,91,127,252,65,140,38,163,203,136,46,136,154,225,249,222,176,228,117,179,208,185,
103,236,64,39,243,156,249,170,249,166,121,117,53,53,128,21,77,222,166,94,191,127,254,159,253,54,247,250,241,92,116,250,212,146,
53,94,214,78,94,192,14,232,11,175,162,63,6,156,50,18,169,131,198,102,226,237,160,168,163,54,114,134,87,228,247,145,156,209,
89,40,211,220,155,89,58,136,185,199,244,146,54,166,239,212,211,180,213,56,140,211,48,104,95,201,220,49,121,59,15,235,46,117,
239,222,134,57,119,139,221,230,223,73,37,177,239,57,233,151,167,83,16,247,242,254,207,127,238,106,167,19,27,219,188,214,248,169,
104,125,109,110,73,40,153,196,106,99,221,196,105,24,74,31,80,245,204,239,131,70,47,50,214,77,113,15,211,85,164,161,164,166,252,
3,248,150,212,53,144,193,157,99,144,239,255,97,215,115,163,103,41,55,211,10,252,21,54,211,118,153,23,81,74,73,237,24,149,143,
117,27,236,52,91,90,116,217,218,190,169,199,207,56,171,14,105,54,25,182,109,211,22,219,241,154,129,239,54,43,203,129,211,105,
185,141,176,82,115,163,21,167,83,165,82,207,229,177,168,114,42,112,171,180,109,131,169,21,69,157,202,66,216,62,26,4,126,80,165,
205,61,167,31,86,142,179,48,116,150,89,149,198,123,214,53,182,116,214,141,122,29,230,96,111,179,224,62,17,88,106,127,42,85,122,
248,62,17,39,88,232,119,131,6,59,193,206,117,89,136,160,137,7,6,133,29,223,11,177,156,145,251,68,241,125,169,210,216,255,240,
196,139,120,212,110,248,43,149,96,37,108,87,206,96,63,43,27,54,117,98,227,130,39,30,28,171,162,70,31,20,85,165,157,118,211,105,
175,186,103,43,142,231,249,145,19,185,190,87,57,234,53,218,126,232,122,203,51,109,39,12,249,162,239,141,153,247,60,22,40,255,
142,251,248,143,179,149,37,21,192,16,50,104,243,130,168,184,62,58,118,186,209,66,20,48,103,165,74,101,105,110,59,222,114,229,
139,75,103,88,35,218,104,67,28,150,81,37,109,145,244,197,99,100,44,30,179,41,129,31,155,146,252,215,134,21,37,182,104,115,43,
111,106,117,74,212,133,187,110,215,235,54,89,78,163,129,26,153,109,59,203,33,37,25,175,8,202,11,17,31,22,153,95,113,86,221,134,
239,81,106,153,69,167,130,54,153,45,89,51,148,104,249,97,68,22,255,61,194,218,44,98,77,74,243,134,237,55,206,82,134,107,39,
253,83,24,33,237,134,71,92,167,237,47,83,222,13,97,8,158,67,169,116,3,70,9,207,89,97,148,247,189,25,108,39,59,237,122,77,127,
141,10,104,34,249,168,175,253,37,212,240,44,46,175,176,133,41,242,178,189,16,57,1,159,113,192,247,78,176,6,115,87,89,115,14,87,
130,40,106,42,223,49,198,133,78,102,32,107,148,50,1,11,187,237,232,120,184,76,67,97,203,239,182,155,243,94,196,80,159,157,72,
149,49,101,165,221,246,157,38,101,34,182,206,175,178,149,54,37,162,150,27,82,58,242,229,182,147,209,197,118,36,87,157,118,23,
185,172,162,96,104,203,90,92,174,189,132,226,49,183,198,174,190,228,98,223,176,242,241,196,248,164,189,100,135,238,114,196,89,
143,40,251,189,169,15,223,229,233,229,159,90,147,251,185,166,85,204,130,62,92,213,207,172,237,165,87,180,121,179,80,167,111,
107,137,218,19,83,79,115,245,113,225,254,45,85,245,223,124,3,1,7,200,44,60,243,133,177,237,116,88,175,77,155,133,239,108,39,
219,168,77,239,54,11,23,235,116,194,168,29,154,20,182,35,70,109,207,46,161,213,245,218,33,115,244,153,215,254,110,208,225,161,
189,59,146,180,237,161,55,112,223,55,11,164,23,180,233,145,188,190,73,127,36,145,153,26,214,98,69,215,139,218,244,118,125,196,
26,201,145,110,224,233,74,43,39,191,121,62,113,41,109,92,208,73,3,41,237,87,105,77,187,142,127,255,100,74,135,55,11,239,103,
105,83,121,99,44,237,74,6,81,224,181,172,166,189,7,110,130,43,22,191,201,15,162,199,143,248,255,123,81,253,71,104,125,50,126,
223,224,247,250,248,157,131,223,227,251,223,59,226,119,15,254,63,30,191,127,164,232,206,59,136,81,148,58,255,239,210,198,229,
179,22,30,59,40,53,46,237,252,57,75,43,202,231,17,254,92,172,143,203,121,249,59,139,161,226,249,115,81,98,92,206,197,159,157,72,
245,221,175,22,206,215,202,223,143,254,11,250,146,74,12,88,13,0,0,0,0};


#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
  METHOD (constructor,         "<init>",              "(Landroid/content/Context;)V") \
  METHOD (getSettings,         "getSettings",         "()Landroid/webkit/WebSettings;") \
  METHOD (canGoBack,           "canGoBack",           "()Z") \
  METHOD (goBack,              "goBack",              "()V") \
  METHOD (goForward,           "goForward",           "()V") \
  METHOD (loadDataWithBaseURL, "loadDataWithBaseURL", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V") \
  METHOD (loadUrl,             "loadUrl",             "(Ljava/lang/String;Ljava/util/Map;)V") \
  METHOD (postUrl,             "postUrl",             "(Ljava/lang/String;[B)V") \
  METHOD (reload,              "reload",              "()V") \
  METHOD (setWebChromeClient,  "setWebChromeClient",  "(Landroid/webkit/WebChromeClient;)V") \
  METHOD (setWebViewClient,    "setWebViewClient",    "(Landroid/webkit/WebViewClient;)V") \
  METHOD (stopLoading,         "stopLoading",         "()V")

DECLARE_JNI_CLASS (AndroidWebView, "android/webkit/WebView")
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
  METHOD (constructor, "<init>", "()V")

DECLARE_JNI_CLASS (AndroidWebChromeClient, "android/webkit/WebChromeClient")
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
  METHOD (constructor, "<init>", "()V")

DECLARE_JNI_CLASS (AndroidWebViewClient, "android/webkit/WebViewClient")
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
  STATICMETHOD (getInstance, "getInstance", "()Landroid/webkit/CookieManager;")

DECLARE_JNI_CLASS (AndroidCookieManager, "android/webkit/CookieManager")
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
  METHOD (setBuiltInZoomControls,    "setBuiltInZoomControls",    "(Z)V") \
  METHOD (setDisplayZoomControls,    "setDisplayZoomControls",    "(Z)V") \
  METHOD (setJavaScriptEnabled,      "setJavaScriptEnabled",      "(Z)V") \
  METHOD (setSupportMultipleWindows, "setSupportMultipleWindows", "(Z)V")

DECLARE_JNI_CLASS (WebSettings, "android/webkit/WebSettings")
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
  METHOD (toString, "toString", "()Ljava/lang/String;")

DECLARE_JNI_CLASS (SslError, "android/net/http/SslError")
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
  STATICMETHOD (encode, "encode", "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;")

DECLARE_JNI_CLASS (URLEncoder, "java/net/URLEncoder")
#undef JNI_CLASS_MEMBERS

//==============================================================================
class WebBrowserComponent::Pimpl    : public AndroidViewComponent,
                                      public AsyncUpdater
{
public:
    Pimpl (WebBrowserComponent& o)
        : owner (o)
    {
        auto* env = getEnv();

        setView (env->NewObject (AndroidWebView, AndroidWebView.constructor, getMainActivity().get()));

        auto settings = LocalRef<jobject> (env->CallObjectMethod ((jobject) getView(), AndroidWebView.getSettings));
        env->CallVoidMethod (settings, WebSettings.setJavaScriptEnabled, true);
        env->CallVoidMethod (settings, WebSettings.setBuiltInZoomControls, true);
        env->CallVoidMethod (settings, WebSettings.setDisplayZoomControls, false);
        env->CallVoidMethod (settings, WebSettings.setSupportMultipleWindows, true);

        juceWebChromeClient = GlobalRef (LocalRef<jobject> (env->NewObject (JuceWebChromeClient, JuceWebChromeClient.constructor,
                                                                            reinterpret_cast<jlong> (this))));
        env->CallVoidMethod ((jobject) getView(), AndroidWebView.setWebChromeClient, juceWebChromeClient.get());

        auto sdkVersion = getAndroidSDKVersion();

        if (sdkVersion >= 21)
            juceWebViewClient = GlobalRef (LocalRef<jobject> (env->NewObject (JuceWebViewClient21, JuceWebViewClient21.constructor,
                                                                              reinterpret_cast<jlong> (this))));
        else
            juceWebViewClient = GlobalRef (LocalRef<jobject> (env->NewObject (JuceWebViewClient16, JuceWebViewClient16.constructor,
                                                                              reinterpret_cast<jlong> (this))));

        env->CallVoidMethod ((jobject) getView(), AndroidWebView.setWebViewClient, juceWebViewClient.get());
    }

    ~Pimpl()
    {
        auto* env = getEnv();

        env->CallVoidMethod ((jobject) getView(), AndroidWebView.stopLoading);

        auto defaultChromeClient = LocalRef<jobject> (env->NewObject (AndroidWebChromeClient, AndroidWebChromeClient.constructor));
        auto defaultViewClient   = LocalRef<jobject> (env->NewObject (AndroidWebViewClient,   AndroidWebViewClient  .constructor));

        env->CallVoidMethod ((jobject) getView(), AndroidWebView.setWebChromeClient, defaultChromeClient.get());
        env->CallVoidMethod ((jobject) getView(), AndroidWebView.setWebViewClient,   defaultViewClient  .get());

        masterReference.clear();

        // if other Java thread is waiting for us to respond to page load request
        // wake it up immediately (false answer will be sent), so that it releases
        // the lock we need when calling hostDeleted.
        responseReadyEvent.signal();

        env->CallVoidMethod (juceWebViewClient, getAndroidSDKVersion() >= 21 ? JuceWebViewClient21.hostDeleted
                                                                             : JuceWebViewClient16.hostDeleted);
    }

    void goToURL (const String& url,
                  const StringArray* headers,
                  const MemoryBlock* postData)
    {
        auto* env = getEnv();

        if (headers == nullptr && postData == nullptr)
        {
            env->CallVoidMethod ((jobject) getView(), AndroidWebView.loadUrl, javaString (url).get(), 0);
        }
        else if (headers != nullptr && postData == nullptr)
        {
            auto headersMap = LocalRef<jobject> (env->NewObject (JavaHashMap,
                                                                 JavaHashMap.constructorWithCapacity,
                                                                 headers->size()));

            for (const auto& header : *headers)
            {
                auto name  = header.upToFirstOccurrenceOf (":", false, false).trim();
                auto value = header.fromFirstOccurrenceOf (":", false, false).trim();

                env->CallObjectMethod (headersMap, JavaMap.put,
                                       javaString (name).get(),
                                       javaString (value).get());
            }

            env->CallVoidMethod ((jobject) getView(), AndroidWebView.loadUrl,
                                 javaString (url).get(), headersMap.get());
        }
        else if (headers == nullptr && postData != nullptr)
        {
            auto dataStringJuce = postData->toString();
            auto dataStringJava = javaString (dataStringJuce);
            auto encodingString = LocalRef<jobject> (env->CallStaticObjectMethod (URLEncoder, URLEncoder.encode,
                                                                                  dataStringJava.get(), javaString ("utf-8").get()));

            auto bytes = LocalRef<jbyteArray> ((jbyteArray) env->CallObjectMethod (encodingString, JavaString.getBytes));

            env->CallVoidMethod ((jobject) getView(), AndroidWebView.postUrl,
                                 javaString (url).get(), bytes.get());
        }
        else if (headers != nullptr && postData != nullptr)
        {
            // There is no support for both extra headers and post data in Android WebView, so
            // we need to open URL manually.

            URL urlToUse = URL (url).withPOSTData (*postData);
            connectionThread.reset (new ConnectionThread (*this, urlToUse, *headers));
        }
    }

    void stop()
    {
        connectionThread = nullptr;

        getEnv()->CallVoidMethod ((jobject) getView(), AndroidWebView.stopLoading);
    }

    void goBack()
    {
        connectionThread = nullptr;

        auto* env = getEnv();
        auto view = (jobject) getView();

        if (env->CallBooleanMethod (view, AndroidWebView.canGoBack))
            env->CallVoidMethod (view, AndroidWebView.goBack);
        else
            owner.reloadLastURL();
    }

    void goForward()
    {
        connectionThread = nullptr;

        getEnv()->CallVoidMethod ((jobject) getView(), AndroidWebView.goForward);
    }

    void refresh()
    {
        connectionThread = nullptr;

        getEnv()->CallVoidMethod ((jobject) getView(), AndroidWebView.reload);
    }

    void handleAsyncUpdate()
    {
        jassert (connectionThread != nullptr);

        if (connectionThread == nullptr)
            return;

        auto& result = connectionThread->getResult();

        if (result.statusCode >= 200 && result.statusCode < 300)
        {
            auto url = javaString (result.url);
            auto data = javaString (result.data);
            auto mimeType = javaString ("text/html");
            auto encoding = javaString ("utf-8");

            getEnv()->CallVoidMethod ((jobject) getView(), AndroidWebView.loadDataWithBaseURL,
                                      url.get(), data.get(), mimeType.get(),
                                      encoding.get(), 0);
        }
        else
        {
            owner.pageLoadHadNetworkError (result.description);
        }
    }

    bool handlePageAboutToLoad (const String& url)
    {
        if (MessageManager::getInstance()->isThisTheMessageThread())
            return owner.pageAboutToLoad (url);

        WeakReference<Pimpl> weakRef (this);

        if (weakRef == nullptr)
            return false;

        responseReadyEvent.reset();

        bool shouldLoad = false;

        MessageManager::callAsync ([weakRef, url, &shouldLoad]
        {
            if (weakRef == nullptr)
                return;

            shouldLoad = weakRef->owner.pageAboutToLoad (url);

            weakRef->responseReadyEvent.signal();
        });

        responseReadyEvent.wait (-1);

        return shouldLoad;
    }

    WebBrowserComponent& owner;

private:
    class ConnectionThread  : private Thread
    {
    public:
        struct Result
        {
            String url;
            int statusCode = 0;
            String description;
            String data;
        };

        ConnectionThread (Pimpl& ownerToUse,
                          URL& url,
                          const StringArray& headers)
            : Thread ("WebBrowserComponent::Pimpl::ConnectionThread"),
              owner (ownerToUse),
              webInputStream (new WebInputStream (url, true))
        {
            webInputStream->withExtraHeaders (headers.joinIntoString ("\n"));
            webInputStream->withConnectionTimeout (10000);

            result.url = url.toString (true);

            startThread();
        }

        ~ConnectionThread() override
        {
            webInputStream->cancel();
            signalThreadShouldExit();
            waitForThreadToExit (10000);

            webInputStream = nullptr;
        }

        void run() override
        {
            if (! webInputStream->connect (nullptr))
            {
                result.description = "Could not establish connection";
                owner.triggerAsyncUpdate();
                return;
            }

            result.statusCode = webInputStream->getStatusCode();
            result.description = "Status code: " + String (result.statusCode);
            readFromInputStream();
            owner.triggerAsyncUpdate();
        }

        const Result& getResult() { return result; }

    private:
        void readFromInputStream()
        {
            MemoryOutputStream ostream;

            for (;;)
            {
                if (threadShouldExit())
                    return;

                char buffer [8192];
                auto num = webInputStream->read (buffer, sizeof (buffer));

                if (num <= 0)
                    break;

                ostream.write (buffer, (size_t) num);
            }

            result.data = ostream.toUTF8();
        }

        Pimpl& owner;
        std::unique_ptr<WebInputStream> webInputStream;
        Result result;
    };

    //==============================================================================
    #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
     METHOD (constructor, "<init>",      "(J)V") \
     METHOD (hostDeleted, "hostDeleted", "()V") \
     CALLBACK (webViewReceivedHttpError, "webViewReceivedHttpError", "(JLandroid/webkit/WebView;Landroid/webkit/WebResourceRequest;Landroid/webkit/WebResourceResponse;)V") \
     CALLBACK (webViewPageLoadStarted, "webViewPageLoadStarted", "(JLandroid/webkit/WebView;Ljava/lang/String;)Z") \
     CALLBACK (webViewPageLoadFinished, "webViewPageLoadFinished", "(JLandroid/webkit/WebView;Ljava/lang/String;)V") \
     CALLBACK (webViewReceivedSslError, "webViewReceivedSslError", "(JLandroid/webkit/WebView;Landroid/webkit/SslErrorHandler;Landroid/net/http/SslError;)V") \

     DECLARE_JNI_CLASS_WITH_BYTECODE (JuceWebViewClient21, "com/rmsl/juce/JuceWebView21$Client", 21, JuceWebView21ByteCode, sizeof (JuceWebView21ByteCode))
    #undef JNI_CLASS_MEMBERS

    #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
     METHOD (constructor, "<init>",      "(J)V") \
     METHOD (hostDeleted, "hostDeleted", "()V") \
     CALLBACK (webViewPageLoadStarted, "webViewPageLoadStarted", "(JLandroid/webkit/WebView;Ljava/lang/String;)Z") \
     CALLBACK (webViewPageLoadFinished, "webViewPageLoadFinished", "(JLandroid/webkit/WebView;Ljava/lang/String;)V") \
     CALLBACK (webViewReceivedSslError, "webViewReceivedSslError", "(JLandroid/webkit/WebView;Landroid/webkit/SslErrorHandler;Landroid/net/http/SslError;)V") \

     DECLARE_JNI_CLASS_WITH_BYTECODE (JuceWebViewClient16, "com/rmsl/juce/JuceWebView$Client", 16, JuceWebView16ByteCode, sizeof (JuceWebView16ByteCode))
    #undef JNI_CLASS_MEMBERS

    static jboolean JNICALL webViewPageLoadStarted (JNIEnv*, jobject /*activity*/, jlong host, jobject /*webView*/, jstring url)
    {
        if (auto* myself = reinterpret_cast<WebBrowserComponent::Pimpl*> (host))
            return myself->handlePageAboutToLoad (juceString (url));

        return 0;
    }

    static void JNICALL webViewPageLoadFinished (JNIEnv*, jobject /*activity*/, jlong host, jobject /*webView*/, jstring url)
    {
        if (auto* myself = reinterpret_cast<WebBrowserComponent::Pimpl*> (host))
            myself->owner.pageFinishedLoading (juceString (url));
    }

    static void JNICALL webViewReceivedHttpError (JNIEnv*, jobject /*activity*/, jlong host, jobject /*webView*/, jobject /*request*/, jobject errorResponse)
    {
        if (auto* myself = reinterpret_cast<WebBrowserComponent::Pimpl*> (host))
            myself->webReceivedHttpError (errorResponse);
    }

    static void JNICALL webViewReceivedSslError (JNIEnv*, jobject /*activity*/, jlong host, jobject /*webView*/, jobject /*sslErrorHandler*/, jobject sslError)
    {
        auto* env = getEnv();

        if (auto* myself = reinterpret_cast<WebBrowserComponent::Pimpl*> (host))
        {
            auto errorString = LocalRef<jstring> ((jstring) env->CallObjectMethod (sslError, SslError.toString));

            myself->owner.pageLoadHadNetworkError (juceString (errorString));
        }
    }

    //==============================================================================
    #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
      METHOD (constructor, "<init>",      "(J)V") \
      CALLBACK (webViewCloseWindowRequest,  "webViewCloseWindowRequest",  "(JLandroid/webkit/WebView;)V") \
      CALLBACK (webViewCreateWindowRequest, "webViewCreateWindowRequest", "(JLandroid/webkit/WebView;)V") \

    DECLARE_JNI_CLASS (JuceWebChromeClient, "com/rmsl/juce/JuceWebView$ChromeClient")
    #undef JNI_CLASS_MEMBERS

    static void JNICALL webViewCloseWindowRequest (JNIEnv*, jobject /*activity*/, jlong host, jobject /*webView*/)
    {
        if (auto* myself = reinterpret_cast<WebBrowserComponent::Pimpl*> (host))
            myself->owner.windowCloseRequest();
    }

    static void JNICALL webViewCreateWindowRequest (JNIEnv*, jobject /*activity*/, jlong host, jobject /*webView*/)
    {
        if (auto* myself = reinterpret_cast<WebBrowserComponent::Pimpl*> (host))
            myself->owner.newWindowAttemptingToLoad ({});
    }

    //==============================================================================
    void webReceivedHttpError (jobject errorResponse)
    {
        auto* env = getEnv();

        LocalRef<jclass> responseClass (env->FindClass ("android/webkit/WebResourceResponse"));

        if (responseClass != nullptr)
        {
            jmethodID method = env->GetMethodID (responseClass, "getReasonPhrase", "()Ljava/lang/String;");

            if (method != nullptr)
            {
                auto errorString = LocalRef<jstring> ((jstring) env->CallObjectMethod (errorResponse, method));

                owner.pageLoadHadNetworkError (juceString (errorString));
                return;
            }
        }

        // Should never get here!
        jassertfalse;
        owner.pageLoadHadNetworkError ({});
    }

    //==============================================================================
    GlobalRef juceWebChromeClient;
    GlobalRef juceWebViewClient;
    std::unique_ptr<ConnectionThread> connectionThread;
    WaitableEvent responseReadyEvent;

    WeakReference<Pimpl>::Master masterReference;
    friend class WeakReference<Pimpl>;
};

//==============================================================================
WebBrowserComponent::WebBrowserComponent (const bool unloadWhenHidden)
    : blankPageShown (false),
      unloadPageWhenBrowserIsHidden (unloadWhenHidden)
{
    setOpaque (true);

    browser.reset (new Pimpl (*this));
    addAndMakeVisible (browser.get());
}

WebBrowserComponent::~WebBrowserComponent()
{
}

//==============================================================================
void WebBrowserComponent::goToURL (const String& url,
                                   const StringArray* headers,
                                   const MemoryBlock* postData)
{
    lastURL = url;

    if (headers != nullptr)
        lastHeaders = *headers;
    else
        lastHeaders.clear();

    if (postData != nullptr)
        lastPostData = *postData;
    else
        lastPostData.reset();

    blankPageShown = false;

    browser->goToURL (url, headers, postData);
}

void WebBrowserComponent::stop()
{
    browser->stop();
}

void WebBrowserComponent::goBack()
{
    browser->goBack();

    lastURL.clear();
    blankPageShown = false;
}

void WebBrowserComponent::goForward()
{
    lastURL.clear();

    browser->goForward();
}

void WebBrowserComponent::refresh()
{
    browser->refresh();
}

//==============================================================================
void WebBrowserComponent::paint (Graphics& g)
{
    g.fillAll (Colours::white);
}

void WebBrowserComponent::checkWindowAssociation()
{
    if (isShowing())
    {
        if (blankPageShown)
            goBack();
    }
    else
    {
        if (unloadPageWhenBrowserIsHidden && ! blankPageShown)
        {
            // when the component becomes invisible, some stuff like flash
            // carries on playing audio, so we need to force it onto a blank
            // page to avoid this, (and send it back when it's made visible again).

            blankPageShown = true;
            browser->goToURL ("about:blank", nullptr, nullptr);
        }
    }
}

void WebBrowserComponent::reloadLastURL()
{
    if (lastURL.isNotEmpty())
    {
        goToURL (lastURL, &lastHeaders, lastPostData.getSize() == 0 ? nullptr : &lastPostData);
        lastURL.clear();
    }
}

void WebBrowserComponent::parentHierarchyChanged()
{
    checkWindowAssociation();
}

void WebBrowserComponent::resized()
{
    browser->setSize (getWidth(), getHeight());
}

void WebBrowserComponent::visibilityChanged()
{
    checkWindowAssociation();
}

void WebBrowserComponent::focusGained (FocusChangeType)
{
}

void WebBrowserComponent::clearCookies()
{
    auto* env = getEnv();

    auto cookieManager = LocalRef<jobject> (env->CallStaticObjectMethod (AndroidCookieManager,
                                                                         AndroidCookieManager.getInstance));

    jmethodID clearCookiesMethod = nullptr;

    if (getAndroidSDKVersion() >= 21)
    {
        clearCookiesMethod = env->GetMethodID (AndroidCookieManager, "removeAllCookies", "(Landroid/webkit/ValueCallback;)V");
        env->CallVoidMethod (cookieManager, clearCookiesMethod, 0);
    }
    else
    {
        clearCookiesMethod = env->GetMethodID (AndroidCookieManager, "removeAllCookie", "()V");
        env->CallVoidMethod (cookieManager, clearCookiesMethod);
    }
}

WebBrowserComponent::Pimpl::JuceWebViewClient16_Class   WebBrowserComponent::Pimpl::JuceWebViewClient16;
WebBrowserComponent::Pimpl::JuceWebViewClient21_Class   WebBrowserComponent::Pimpl::JuceWebViewClient21;
WebBrowserComponent::Pimpl::JuceWebChromeClient_Class WebBrowserComponent::Pimpl::JuceWebChromeClient;
} // namespace juce