Note: Since bundled JDK version 1.8.40-release-b132 that is part of the 2016 named products the JDK includes all the necessary files for full JavaFX functionality without the need of a custom JDK.
JetBrains products for the Mac come with a bundled Open JDK which has much better text rendering than the Oracle JDK distributions but with one major drawback: no JavaFX library or the native libraries it depends on.
I used the Oracle JDK for months and could not figure out why my main IDE text looks so washed out when some of the debug configurations that I used were crisp and high contrast, until I realized it was the difference between the bundled open JDK and the Oracle distributed JDK that was the cause of the difference.
Once I figured it out I switched to the bundled JDK and lived with the lack of JavaFX Preview until I ported the Markdown Support solution of an overlay JavaFX library.
The overlay JavaFX zip which is used in Markdown Support plugin and Markdown Navigator plugin, adds JavaFX WebView preview when running on the bundled JDK on the Mac but it has limitations. Mainly, the media support libraries are not included and even if they were they would not load with the custom class loader used to load the overlay JavaFX library. Also when JavaFX/WebView classes are loaded by a custom class loader it fails to paint scroll bars in the rendered page.
The lack of media libraries causes the overlay JavaFX WebView to crash when an SVG image is embedded in the HTML. The workaround used in Markdown Support and duplicated in Markdown Navigator is to rename all SVG images so that they are not resolved by WebView preventing a crash, but also preventing them from being displayed.
While developing the Markdown Navigator plugin I need to be able to see the full WebView preview with a non-bundled JDK but could not continuously work with the washed out text.
A little experimentation and I created a copy of the Bundled JDK with JavaFX files from the JavaFX overlay zip and the missing media libraries from Oracle JDK 1.8u66 distribution that gives me bundled JDK text rendering quality without sacrificing JavaFX WebView media rendering capabilities.
To create one for yourself you need to:
Copy the bundled Open JDK from the JetBrains product that you are using to your
/Library/Javadirectory. Different applications have different builds of the bundled JDK. I used PhpStorm 11 EAP because it has the latest
b119. Check your installed JetBrains applications about box and use the one with latest build, or create more than one with different builds.
The JavaFX overlay zip file used by Markdown Support or Markdown Navigator is installed into the application's configuration directory, or you can download it from the same place the plugins download it;
Expand the zip into the jdk
Copy the missing native libraries from an Oracle distribution, use the latest available, on my system it was jdk1.8.0_66.jdk
# 1. copy bundled JDK as a jdk under /Library/Java sudo cp -R /Applications/"PhpStorm EAP.app"/Contents/jre/jdk /Library/Java/JavaVirtualMachines/openjdk1.8.0_40b119 # 2. download the javafx sdk overlay sudo curl --location http://download.jetbrains.com/idea/open-jfx/javafx-sdk-overlay.zip --output /Library/Java/JavaVirtualMachines/openjdk1.8.0_40b119/javafx-sdk-overlay.zip # 3. expand it into place sudo unzip -bq /Library/Java/JavaVirtualMachines/openjdk1.8.0_40b119/javafx-sdk-overlay.zip -d /Library/Java/JavaVirtualMachines/openjdk1.8.0_40b119/Contents/Home # 4. copy the missing native libraries from the latest Oracle jdk installation sudo cp /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/libglib-lite.dylib /Library/Java/JavaVirtualMachines/openjdk1.8.0_40b119/Contents/Home/jre/lib sudo cp /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/libgstreamer-lite.dylib /Library/Java/JavaVirtualMachines/openjdk1.8.0_40b119/Contents/Home/jre/lib sudo cp /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/libjfxmedia.dylib /Library/Java/JavaVirtualMachines/openjdk1.8.0_40b119/Contents/Home/jre/lib sudo cp /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/libjfxmedia_avf.dylib /Library/Java/JavaVirtualMachines/openjdk1.8.0_40b119/Contents/Home/jre/lib sudo cp /Library/Java/JavaVirtualMachines/jdk1.8.0_66.jdk/Contents/Home/jre/lib/libjfxmedia_qtkit.dylib /Library/Java/JavaVirtualMachines/openjdk1.8.0_40b119/Contents/Home/jre/lib
Now point your JetBrains application's boot JDK to the newly created JDK and try it out. See Markdown Navigator wiki Changing Boot JDK
Constructive comments and suggestions are welcome. I can also be reached me at email@example.com
This work is licensed under a Creative Commons Attribution 4.0 International License.