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From: | Jim Porter |
Subject: | bug#56820: outline-minor-mode replacing the first character with an arrow |
Date: | Wed, 7 Sep 2022 13:01:50 -0700 |
On 9/7/2022 11:36 AM, Juri Linkov wrote:
This is supposed to be the Emacs answer to the various IDEs being able to fold code, right? Then let's try to make it look like in those IDEs.This is an interesting question. I tried to search how outlines look in other IDEs, and found such a screenshot for VSCode. IIUC, here the first column with a red circle for a breakpoint corresponds to Emacs fringes, the second column with line numbers is the same as display-line-numbers-mode, and the third column is for outline arrows.
This is a good example of a potential conflict with putting the outline buttons in the fringe: line 10 has both an outline arrow *and* a breakpoint. (Emacs usually uses the fringe for breakpoints.) As far as I know, there's no way to show multiple fringe icons on a single line (other than using the right fringe, which would be odd in this case).
In this case, it looks like gdb-mi.el supports putting breakpoint icons in the margin, so the conflict could be avoided that way. Still, I'm not sure what the general answer should be. How should Emacs present buttons like this in a way where they don't conflict? For example, should there be a guideline about what kinds of icons/buttons "belong" in the fringe, and what kinds belong elsewhere? Note: this guideline could just inform the default configuration, and then users could customize things if they have different preferences.
Or maybe the fringe should be enhanced in some way where it can handle multiple fringe icons in the same position. I'm not sure how that would work though...
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