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From: Stefan Kangas <stefan@HIDDEN>
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20 Dec 2021 10:53:54 +0100")
References: <87tuf7zksh.fsf@HIDDEN> <861r28io75.fsf@HIDDEN>
<87mtkvppot.fsf@HIDDEN>
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Date: Tue, 21 Dec 2021 22:03:31 -0800
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Subject: Re: bug#52569: 29.0.50; Wishlist: There should be a way for packages
to handle files without reading them in first
To: Lars Ingebrigtsen <larsi@HIDDEN>
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Lars Ingebrigtsen <larsi@HIDDEN> writes:
>> non-persistent-file-mode, or transient-file-mode, or ephemeral-mode...
>
> Hm... if `view-mode' wasn't taken already, perhaps that would have been
> an option.
Here are some additional ideas:
special-display-mode
special-file-mode
no-load-mode
no-visit-mode [if it won't be visiting]
bug-gnu-emacs@HIDDEN:bug#52569; Package emacs.
Full text available.Received: (at 52569) by debbugs.gnu.org; 21 Dec 2021 04:09:42 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Dec 20 23:09:42 2021 Received: from localhost ([127.0.0.1]:51991 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1mzWT7-0000UT-PQ for submit <at> debbugs.gnu.org; Mon, 20 Dec 2021 23:09:42 -0500 Received: from quimby.gnus.org ([95.216.78.240]:60132) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1mzWT6-0000UH-U6 for 52569 <at> debbugs.gnu.org; Mon, 20 Dec 2021 23:09:41 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Resent-Message-ID:Resent-Date:Resent-From: Resent-To:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Sender:Resent-Cc:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=3VfBrhIccToVf1JJvL7WQT/+J9rO3q7OkRGKu9htlvE=; b=GyrtFryRaS/RXub3ZKtdjWIO1u BzdPNFjsQwbllRnJUnQcXF+NvPuduIFPBAXm7zsT2ydRgqxlKVOJU39S9isZpp0jQW3FB40XbaJTI tGsPyHwgAfbxJ1UhZsCJ/yS7fDG3JusUtPEW//6W4bn6pQVOnQ9QYQhEiJFnSBtdbrbE=; Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1mzWSy-0002oY-Vd for 52569 <at> debbugs.gnu.org; Tue, 21 Dec 2021 05:09:35 +0100 Resent-X-Now-Playing: Heidi Berry's _Love_: "Gloria" Resent-To: 52569 <at> debbugs.gnu.org Resent-From: Lars Ingebrigtsen <larsi@HIDDEN> Resent-Date: Tue, 21 Dec 2021 05:09:31 +0100 Resent-Message-ID: <87ee66lhtw.fsf@HIDDEN> X-From-Line: nobody Mon Dec 20 10:53:58 2021 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Juri Linkov <juri@HIDDEN> Subject: Re: bug#52569: 29.0.50; Wishlist: There should be a way for packages to handle files without reading them in first References: <87tuf7zksh.fsf@HIDDEN> <861r28io75.fsf@HIDDEN> Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAgMAAAAqbBEUAAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAACVBMVEWOoVlMZDn///9k 6/PIAAAAAWJLR0QCZgt8ZAAAAAd0SU1FB+UMFAkxCrmP2HsAAAFESURBVCjPRVFBDuQwCDNSuKdS +A+RmjuR4P9fWdMd7ebSOAZsXIBnYMx4+yaJwFCYF1xLHJgVFkBV34HFqvhAQJdpg5KA8N1gBLvu hChbiE7VADzZTxJKPpsi5lTJU2BJ1fW20c+ZJBKmG/1uFbRDvUFRspcjEl7q99btVpSr63cl6DW0 fiBi/gf3vp/L5iGie44pY9LBddHRJw73L31YMrjsYAZ7TpGXlYKzG4BgDepsVfEnpy+cDorlPInn S7LjqPjikr+aDHH/qrT4fhw/N9zH//UUZt7AuxSHJcnUOhjoFrIJPQd4juEpH0+q49HLELGYVFXr VI6VztC6hy0fEebajE2qs06Qiz1ZVLj0PXzFsqAx/tNB49PcMKzLqMjkocYPg5DqZV6UTs4+QiOL FsM5zSlEvz73sAeRjEq5txqTnbA/cGxYvOKgEBwAAAAldEVYdGRhdGU6Y3JlYXRlADIwMjEtMTIt MjBUMDk6NDk6MTArMDA6MDDZqP18AAAAJXRFWHRkYXRlOm1vZGlmeQAyMDIxLTEyLTIwVDA5OjQ5 OjEwKzAwOjAwqPVFwAAAAABJRU5ErkJggg== X-Now-Playing: The Lilac Time's _Strange Folk_: "Morning Sun" Date: Mon, 20 Dec 2021 10:53:54 +0100 In-Reply-To: <861r28io75.fsf@HIDDEN> (Juri Linkov's message of "Sun, 19 Dec 2021 19:16:42 +0200") Message-ID: <87mtkvppot.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Lines: 52 X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Juri Linkov <juri@HIDDEN> writes: >> This would be useful for large files like .sqlite and images. > > I'm not sure about images since some image formats are editable, > like .svg, .xpm, .ps... I think we'd want to keep the traditinal auto-mode-alist for the editable image formats. Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 52569 Cc: 52569 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) Juri Linkov <juri@HIDDEN> writes: >> This would be useful for large files like .sqlite and images. > > I'm not sure about images since some image formats are editable, > like .svg, .xpm, .ps... I think we'd want to keep the traditinal auto-mode-alist for the editable image formats. > Only .pdf with in doc-view-mode could have this optimization of not > loading the whole file. Also archive files could benefit from this > optimization. arc-mode interprets zip files etc by itself, so I think that would be a bigger challenge. >> This function would be called with the file name and would be >> responsible for returning a buffer that "displays" the file in some >> sense. > > Or when it returns t, this could mean that the function displayed > the buffer in some other way, for example, by calling an external command. > > Then find-file-alist could be used to implement a smarter > dired-guess-shell-alist like for https://debbugs.gnu.org/18132#92 > So not only files visited by dired will be redirected > to an external command, but also files visited by C-x C-f. Hm... interesting idea... I think I'll have to ponder that more, because that'd be a real user interface change, while the thing I was thinking of here wouldn't be very apparent to the user at all -- it'd just make things faster. >> There's some details that aren't clear. Should this new buffer be >> visiting the file? That sounds dangerous, because saving the buffer >> contents to the file would destroy the file. But that could be handled >> by... write-file-functions? > > Also functions that ask about saving a modified file buffer should > probably skip such buffers. Yes, probably. > non-persistent-file-mode, or transient-file-mode, or ephemeral-mode... Hm... if `view-mode' wasn't taken already, perhaps that would have been an option. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#52569; Package emacs.
Full text available.Received: (at 52569) by debbugs.gnu.org; 21 Dec 2021 04:09:21 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Dec 20 23:09:21 2021 Received: from localhost ([127.0.0.1]:51988 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1mzWSn-0000Ts-Fv for submit <at> debbugs.gnu.org; Mon, 20 Dec 2021 23:09:21 -0500 Received: from quimby.gnus.org ([95.216.78.240]:60120) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1mzWSl-0000Tc-Oh for 52569 <at> debbugs.gnu.org; Mon, 20 Dec 2021 23:09:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Resent-Message-ID:Resent-Date:Resent-From: Resent-To:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Sender:Resent-Cc:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=p95dsayM7HfmoTh4/eOINznCCB0OgAeWErWF5G8sxMM=; b=j1V/XHCHisJEoA6UJy1DP8xj2/ ck3kDHNFRiQz2v+ZKCgbjDLWnGBroUO08eynQtfgr2lDJAlK7F/M+np1RC5kcDdOytcJptzp4kQM6 RFWZDqqTmm/1zEod2RgNLTr6R+c25HjvUfdNVg9HnE8mXBwZJMJbSi1lNbjjgBPge0IE=; Received: from [84.212.220.105] (helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1mzWSd-0002oQ-Ru for 52569 <at> debbugs.gnu.org; Tue, 21 Dec 2021 05:09:14 +0100 Resent-X-Now-Playing: Heidi Berry's _Love_: "Gloria" Resent-To: 52569 <at> debbugs.gnu.org Resent-From: Lars Ingebrigtsen <larsi@HIDDEN> Resent-Date: Tue, 21 Dec 2021 05:09:09 +0100 Resent-Message-ID: <87ilvilhui.fsf@HIDDEN> X-From-Line: nobody Mon Dec 20 10:55:08 2021 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Stefan Kangas <stefan@HIDDEN> Subject: Re: bug#52569: 29.0.50; Wishlist: There should be a way for packages to handle files without reading them in first References: <87tuf7zksh.fsf@HIDDEN> <861r28io75.fsf@HIDDEN> <CADwFkmmjZb=9_VicsK53Xeq9t0VtmRoOBmhtPQdv+xdgSWWkEg@HIDDEN> Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAgMAAAAqbBEUAAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAACVBMVEWOoVlMZDn///9k 6/PIAAAAAWJLR0QCZgt8ZAAAAAd0SU1FB+UMFAkxCrmP2HsAAAFESURBVCjPRVFBDuQwCDNSuKdS +A+RmjuR4P9fWdMd7ebSOAZsXIBnYMx4+yaJwFCYF1xLHJgVFkBV34HFqvhAQJdpg5KA8N1gBLvu hChbiE7VADzZTxJKPpsi5lTJU2BJ1fW20c+ZJBKmG/1uFbRDvUFRspcjEl7q99btVpSr63cl6DW0 fiBi/gf3vp/L5iGie44pY9LBddHRJw73L31YMrjsYAZ7TpGXlYKzG4BgDepsVfEnpy+cDorlPInn S7LjqPjikr+aDHH/qrT4fhw/N9zH//UUZt7AuxSHJcnUOhjoFrIJPQd4juEpH0+q49HLELGYVFXr VI6VztC6hy0fEebajE2qs06Qiz1ZVLj0PXzFsqAx/tNB49PcMKzLqMjkocYPg5DqZV6UTs4+QiOL FsM5zSlEvz73sAeRjEq5txqTnbA/cGxYvOKgEBwAAAAldEVYdGRhdGU6Y3JlYXRlADIwMjEtMTIt MjBUMDk6NDk6MTArMDA6MDDZqP18AAAAJXRFWHRkYXRlOm1vZGlmeQAyMDIxLTEyLTIwVDA5OjQ5 OjEwKzAwOjAwqPVFwAAAAABJRU5ErkJggg== X-Now-Playing: Donovan's _Strange Folk_: "The Song of Wandering Aengus" Date: Mon, 20 Dec 2021 10:55:05 +0100 In-Reply-To: <CADwFkmmjZb=9_VicsK53Xeq9t0VtmRoOBmhtPQdv+xdgSWWkEg@HIDDEN> (Stefan Kangas's message of "Sun, 19 Dec 2021 12:00:06 -0800") Message-ID: <87ilvjppmu.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Lines: 17 X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Stefan Kangas <stefan@HIDDEN> writes: >> I'm not sure about images since some image formats are editable, >> like .svg, .xpm, .ps... Only .pdf with in doc-view-mode could have >> this optimization of not loading the whole file. Also archi [...] Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 52569 Cc: 52569 <at> debbugs.gnu.org, Juri Linkov <juri@HIDDEN> X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) Stefan Kangas <stefan@HIDDEN> writes: >> I'm not sure about images since some image formats are editable, >> like .svg, .xpm, .ps... Only .pdf with in doc-view-mode could have >> this optimization of not loading the whole file. Also archive files >> could benefit from this optimization. > > This would improve performance, right? If yes, I think this is sorely > needed for opening images in Emacs (though there are other things to > improve as well). Yes, I think it should improve image performance substantially, but I haven't done any measurements. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#52569; Package emacs.
Full text available.Received: (at 52569) by debbugs.gnu.org; 19 Dec 2021 20:00:15 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Dec 19 15:00:15 2021 Received: from localhost ([127.0.0.1]:48217 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1mz2Lv-00051j-9X for submit <at> debbugs.gnu.org; Sun, 19 Dec 2021 15:00:15 -0500 Received: from mail-pl1-f182.google.com ([209.85.214.182]:41516) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <stefankangas@HIDDEN>) id 1mz2Ls-00051J-W8 for 52569 <at> debbugs.gnu.org; Sun, 19 Dec 2021 15:00:13 -0500 Received: by mail-pl1-f182.google.com with SMTP id z3so1679964plg.8 for <52569 <at> debbugs.gnu.org>; Sun, 19 Dec 2021 12:00:12 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:in-reply-to:references:user-agent :mime-version:date:message-id:subject:to:cc; bh=y5dR3ZHYhVlAakguNxzUgZIBo+3tNU8M67UyrCLwUDo=; b=jGQZag2S/z7y0jxqm2UcPrgTeEj43jvvn/71wNoOsr43PUhk/bttIAomCan0+ryl1m nvjXC87tZSqBprFkUzGVM9rVJXMID61cI8lWBUOE1r98T1XTkdzJHKjvJZW7Hq84XNJo yBi1U3Q8BfTkPw3VjyicmjeZlU0Y8O3J2mN7SEKJuCOCxqA0+X8oQj3xKtayKQUWa/ye EG6Udrzof7MGoEmez24xZHQpgHQ57Ed4mxppn6O53ZMTWJ7TxYCHyjp4e8plObunmU5V uzCDCyNClddZXZmHVgg6E9NgKOx6u1PTO4NVX+bAMpPSQgylPoQjy5q1e+Jm3sdQsIfX cCxA== X-Gm-Message-State: AOAM532AMW3zrTfTlTaDWOP1ZUfePqxLbIzGXAYc1LKJa2Ha2KjHwuOJ y8ygeYV5wCRa/zHs9WzWVkOgylkRwjBknJd+NAI= X-Google-Smtp-Source: ABdhPJwtvWBC5kdEZ2stY/TyYpGavFm08z535q7p6ab+fTkgxPW6lITnKdJ3yiN5kOz2NOr9yFf3X0VbJw9XL3M/WYU= X-Received: by 2002:a17:902:8e87:b0:148:a2e8:2c5f with SMTP id bg7-20020a1709028e8700b00148a2e82c5fmr13673807plb.174.1639944006800; Sun, 19 Dec 2021 12:00:06 -0800 (PST) Received: from 753933720722 named unknown by gmailapi.google.com with HTTPREST; Sun, 19 Dec 2021 12:00:06 -0800 From: Stefan Kangas <stefan@HIDDEN> In-Reply-To: <861r28io75.fsf@HIDDEN> (Juri Linkov's message of "Sun, 19 Dec 2021 19:16:42 +0200") References: <87tuf7zksh.fsf@HIDDEN> <861r28io75.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) MIME-Version: 1.0 Date: Sun, 19 Dec 2021 12:00:06 -0800 Message-ID: <CADwFkmmjZb=9_VicsK53Xeq9t0VtmRoOBmhtPQdv+xdgSWWkEg@HIDDEN> Subject: Re: bug#52569: 29.0.50; Wishlist: There should be a way for packages to handle files without reading them in first To: Juri Linkov <juri@HIDDEN> Content-Type: text/plain; charset="UTF-8" X-Spam-Score: 0.5 (/) X-Debbugs-Envelope-To: 52569 Cc: Lars Ingebrigtsen <larsi@HIDDEN>, 52569 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.5 (/) Juri Linkov <juri@HIDDEN> writes: >> This would be useful for large files like .sqlite and images. > > I'm not sure about images since some image formats are editable, > like .svg, .xpm, .ps... Only .pdf with in doc-view-mode could have > this optimization of not loading the whole file. Also archive files > could benefit from this optimization. This would improve performance, right? If yes, I think this is sorely needed for opening images in Emacs (though there are other things to improve as well). I think the editable image formats are in the minority, so we could always handle them differently. > Or when it returns t, this could mean that the function displayed > the buffer in some other way, for example, by calling an external command. Yes, that would be very nice. I have wanted something like that to replace the openwith package in my own use.
bug-gnu-emacs@HIDDEN:bug#52569; Package emacs.
Full text available.Received: (at 52569) by debbugs.gnu.org; 19 Dec 2021 17:20:25 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Dec 19 12:20:24 2021 Received: from localhost ([127.0.0.1]:47952 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1myzrE-0007AF-LS for submit <at> debbugs.gnu.org; Sun, 19 Dec 2021 12:20:24 -0500 Received: from relay8-d.mail.gandi.net ([217.70.183.201]:53657) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <juri@HIDDEN>) id 1myzrB-00079h-CN for 52569 <at> debbugs.gnu.org; Sun, 19 Dec 2021 12:20:21 -0500 Received: (Authenticated sender: juri@HIDDEN) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id 3416A1BF205; Sun, 19 Dec 2021 17:20:13 +0000 (UTC) From: Juri Linkov <juri@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> Subject: Re: bug#52569: 29.0.50; Wishlist: There should be a way for packages to handle files without reading them in first Organization: LINKOV.NET References: <87tuf7zksh.fsf@HIDDEN> Date: Sun, 19 Dec 2021 19:16:42 +0200 In-Reply-To: <87tuf7zksh.fsf@HIDDEN> (Lars Ingebrigtsen's message of "Fri, 17 Dec 2021 09:40:30 +0100") Message-ID: <861r28io75.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 52569 Cc: 52569 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > This would be useful for large files like .sqlite and images. I'm not sure about images since some image formats are editable, like .svg, .xpm, .ps... Only .pdf with in doc-view-mode could have this optimization of not loading the whole file. Also archive files could benefit from this optimization. > This function would be called with the file name and would be > responsible for returning a buffer that "displays" the file in some > sense. Or when it returns t, this could mean that the function displayed the buffer in some other way, for example, by calling an external command. Then find-file-alist could be used to implement a smarter dired-guess-shell-alist like for https://debbugs.gnu.org/18132#92 So not only files visited by dired will be redirected to an external command, but also files visited by C-x C-f. > There's some details that aren't clear. Should this new buffer be > visiting the file? That sounds dangerous, because saving the buffer > contents to the file would destroy the file. But that could be handled > by... write-file-functions? Also functions that ask about saving a modified file buffer should probably skip such buffers. > Should there be another general mode these things should inherit from, > like special-mode, but taking care of things like write-file-functions > (i.e., disallow saving if the mode hasn't implemented a function for > that)? If so, what should it be called? `really-special-mode' is > probably too special. Uhm... Something that expresses "the displayed > contents of this mode doesn't match up the saved contents much"... > `unloaded-file-mode'? Hm... any ideas? non-persistent-file-mode, or transient-file-mode, or ephemeral-mode...
bug-gnu-emacs@HIDDEN:bug#52569; Package emacs.
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bug-gnu-emacs@HIDDEN:bug#52569; Package emacs.
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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 29.0.50; Wishlist: There should be a way for packages to handle
files without reading them in first
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Content preview: This would be useful for large files like .sqlite and images.
The mechanism proposed on emacs-devel is to do something similar to
find-directory-functions
in find-file-noselect: (defun find-file-noselect (filename &optional nowarn
rawfile wildcards) [...] (if (file-directory-p filename) (or (and
find-file-run-dired
(run-hook-with-args-until-success 'find-directory-functions ( [...]
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This would be useful for large files like .sqlite and images.
The mechanism proposed on emacs-devel is to do something similar to
find-directory-functions in find-file-noselect:
(defun find-file-noselect (filename &optional nowarn rawfile wildcards)
[...]
(if (file-directory-p filename)
(or (and find-file-run-dired
(run-hook-with-args-until-success
'find-directory-functions
(if find-file-visit-truename
(abbreviate-file-name (file-truename filename))
filename)))
But for files.
So we could have a find-file-function-alist that maps from file names
(using the same syntax as auto-mode-alist) to functions that handle the
files.
This function would be called with the file name and would be
responsible for returning a buffer that "displays" the file in some
sense. For .sqlite, it would basically call `sqlite-mode-open-file',
and image-mode should have a similar function.
There's some details that aren't clear. Should this new buffer be
visiting the file? That sounds dangerous, because saving the buffer
contents to the file would destroy the file. But that could be handled
by... write-file-functions?
Should there be another general mode these things should inherit from,
like special-mode, but taking care of things like write-file-functions
(i.e., disallow saving if the mode hasn't implemented a function for
that)? If so, what should it be called? `really-special-mode' is
probably too special. Uhm... Something that expresses "the displayed
contents of this mode doesn't match up the saved contents much"...
`unloaded-file-mode'? Hm... any ideas?
In GNU Emacs 29.0.50 (build 69, x86_64-pc-linux-gnu, GTK+ Version 3.24.30, cairo version 1.16.0)
of 2021-12-16 built on xo
Repository revision: e7a6d6a546e7e56e5a721aac86a19473e4303111
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: Debian GNU/Linux bookworm/sid
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
Lars Ingebrigtsen <larsi@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#52569; Package emacs.
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