On 5 November 2016 at 20:52, Per Dalgas Jakobsen <[email protected]> wrote:
> On 11/05/2016 05:42 AM, andré wrote: > >> Per Dalgas Jakobsen a écrit : >> >>> Now I'm looking for a way to let Meld ignore formatting of the code, >>> ... >>> Is it a good idea to let Meld (and other diffs) find changes based on >>> logical lines as an alternative to physical lines? Like a >>> switch/preference to use logical lines instead (with options for >>> line-continuation and line-end). >>> Have I overlooked some important considerations here? >>> >> >> Interesting idea, but wouldn't meld have to understand the structure of >> the language coded ? >> >> It seems to me that it would be difficult to code such comparisons, but I >> could be mistaken. Breaking out the logical lines would be one step, but >> for the comparison to be useful, it would also have to locate the logical >> lines in the initial (physical line) file. >> >> If one is comparing different changes to the same file, I wouldn't expect >> that a logical line comparison would produce vastly different results than >> a physical line comparison. >> > > Well, Meld does not have to understand the code structure as such, only > how a logical line is defined (for the language in question). I believe > that having Meld ignoring comments by regex-filtering, the same could be > done for logical lines. > While this is true, Meld *doesn't* have any kind of filtered line <=> file line mapping. This is also the reason that we've never supported filtering out line breaks in our regex filters. Fixing this would be fantastic, and I think would probably enable what you want. > I know that having logical lines ending with a non CR/LF character allows > for multiple logical lines in one physical line, and if Melds internal > diffing is based on physical lines The diffing is based on a straight-up linebreak split of the filtered text. However, we definitely assume that a line in the filtered text corresponds directly to a line in the UI's text buffer. In cases where these don't match (and we've had a few over the years) the result is very, very broken comparisons and UI state. cheers, Kai
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