It also displays the zero-width joiner (ZWJ-U+200D) with a “zero-width” vertical line topped by an x. This is very valuable, for example, in revealing the Bidi RLO (U+202E) and LRO (U+202D) codes that override the usual character directionalities and are sometimes used to spoof files for nefarious purposes. This mode displays Bidi zero-width control characters using distinctive “zero-width” glyphs. Notepad has had a “Show Unicode control characters” option in its context menu for many years. Show Unicode control characters mode and emoji This is still the case, but you can tell RichEdit to recognize the kind of line termination in a file and use that choice for saving/copying the file by sending the EM_SETENDOFLINE message with wparam = EC_ENDOFLINE_DETECTFROMCONTENT. Internally RichEdit follows the lead of Word and the Mac in terminating paragraphs with a CR and converting LF’s and CRLF’s to CR when reading in a file or storing text via an API like WM_SETTEXT or ITextRange2::SetText2. So, a file with LF- terminated lines remains LF terminated and displayed correctly. ![]() To fix this problem, Notepad went one better: it checked to see which line ending came first and then made that line ending the default for the file. I used to open the Unicode Character Data files, which contain LF-terminated lines, with WordPad and save them to convert the LF’s to CRLF’s so that Notepad would display them correctly. ![]() For years Notepad didn’t break Unix-convention lines that terminated with a LF (U+000A) instead of a CRLF (U+000D U+000A). The classic Notepad has two handy features that weren’t implemented in RichEdit: line-ending detection (CR, LF, CRLF) and the “Show Unicode control characters” mode (discussed next).
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