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Now smart search is supported in properties file when search engine is able to find special character without user's effort to use escape sequences. e.g. it's sufficient to set "řeřicha" in engine instead of "\u0159e\u0159icha" Would be nice if possible to use it for searching in java files.
It would be nice, indeed. But it would be a different task than the one for properties files. For properties files, the solution was simply to define and assign a special encoding/decoding that is used for writing to/reading from these files, no matter what encoding is set for the containing project. This is not possible for Java files - they must reflect the project's encoding. Another issue would be with highlighting the found string in the editor. If the search pattern was "řeřicha" and while the source code editor would display "\u0159e\u0159icha" (i.e. not decoded), the highlighting routine would cope with such a situation and highlight the proper 17 characters (not decoded) and not just 7 characters ("řeřicha") which would be displayed in the search results.
Now it's possible to find unicode characters.