How to disable css warning “Unknown property” in Eclipse Mars?

Question

I get many "Unknown property" warnings in my css files.

This might be due to the fact that I have e(fx)clipse 2.0 and the Eclipse Web Developer Tools installed.

If I open the css files with the e(fx)clipse css editor and add /SuppressWarnings/ the warning icon changes its color (see figure below).

However:

• the Problems view still shows the warning and the default css Editor shows the warning, too.
• I do not want to add /SuppressWarnings/ since the css files are automatically generated with WinLess.

How can I disable the "Unknown property" warnings for specific files or at all?

My css files are not located under "src" but under a folder "help". That help folder contains html files for my Eclipse plugin and corresponding css files. =>Those files are not used for JavaFx/e(fx)clipse.

Here is a related article that did not really help me but might give you further information: https://www.eclipse.org/forums/index.php/t/515810/

Screenshot that shows the warnings and the Problem view (click to enlarge)

Answer 1

I filed an e(fx)clipse bug [1] and uninstalled e(fx)clipse for the time being.

The main reason why I had installed e(fx)clipse at the beginning was to get rid of the access restriction warnings related to jfxrt.jar (also see [2]). Now I use additonal access rules for the JRE container in my classpath file instead of using e(fx)eclipse:

<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
        <attributes>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>       
        <accessrules>
            <accessrule kind="accessible" pattern="javafx/**"/>
            <accessrule kind="accessible" pattern="com/sun/javafx/**"/>         
        </accessrules>  
</classpathentry>

[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=475347

[2] Using JavaFX in JRE 8

Answer 2

You can go to the Problems View Options, select Show items that match any configuration checked bellow and deselect Xtext Check (fast) Type in all Configurations

Screenshot: How locate Option in Problems view

Answer 3

I really wish I could comment... So I'm using Luna, where everything works fine. However, I had problems with Angular validation in Luna and figured out a way to work around that. So, maybe this could help you.

1. Right-click on your project and select Properties
2. Under Validation, check the Enable project specific settings box.
3. Scroll down and select Web Resources Validator.
4. If there is an Include Group and it contains File extension: css, try removing it an then re-validating your project. If the rule is not there, then Add Rule into the existing Include Group, or make a new Include Group.

Maybe you've already tried something like this.