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Re: [platform-text-dev] Add "delete previous word" and "delete next word" actions to eclipse editor
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Tomasz,
Your patch locates this functionality at the SWT level. This is in sync
with the navigation actions such as "position cursor after the next word".
Like the navigation actions your implementation uses the StyledText
internal methods to determine the start/end of a word. Those methods are
based on white space detection and the distinction between letters and digits.
The StyledText is used to implement text editors. There is no assumption
about the kind of text that can be edited in such editors. Take the Java
editor as one example. A single Java compilation unit may contain Java code
and comments. The StyledText methods are powerful enough for the Java code
but not for the comments. This is because the contents of the comments is
more or less natural language and the language defines the rules for the
word boundaries. Thus, depending on the active locale, delete next/previous
word potentially behaves differently in the code or comment sections of a
single Java compilation unit. This should also be the case for the
navigation actions and it is a lack in the text editor implementation that
it does not.
A similar problem is the double click behavior of the Java editor. This
actually is different in the code and the comment sections. In the code
sections, it computes word boundaries simply by calls to the predicates
defined in the class Character. In the comment sections, it detects word
boundaries by instances of the class BreakIterator that it creates for the
active locale.
Kai
At 07:39 PM 2/2/2003 +0100, you wrote:
Hi all,
I had been missing both above actions, so I implemented them based on v2.1
M4 source. The attachment with the code has been posted on Bugzilla along
the bug# 29027.
Tomasz
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