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1250 lines
48 KiB
Plaintext
Emacs TODO List -*-outline-*-
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Copyright (C) 2001-2013 Free Software Foundation, Inc.
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See the end of the file for license conditions.
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If you are ready to start working on any of these TODO items, we
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appreciate your help; please write to emacs-devel@gnu.org so we can be
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aware that the problem is being addressed, and talk with you how to do
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it best. Since Emacs is an FSF-copyrighted package, please be
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prepared to sign legal papers to transfer the copyright on your work
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to the FSF.
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* Tentative plan for Emacs-24
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** concurrency: including it as an "experimental" compile-time option
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sounds good. Of course there might still be big questions around
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"which form of concurrency" we'll want.
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** Overhaul of customize: sounds wonderful.
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** better support for dynamic embedded graphics: I like this idea (my
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mpc.el code could use it for the volume widget), though I wonder if the
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resulting efficiency will be sufficient.
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** Spread Semantic.
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** Improve the "code snippets" support: consolidate skeleton.el, tempo.el,
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and expand.el (any other?) and then advertise/use/improve it.
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** Improve VC: yes, there's a lot of work to be done there :-(
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** Random things that cross my mind right now that I'd like to see (some of
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them from my local hacks), but it's not obvious at all whether they'll
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make it.
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*** multiple inheritance for keymaps (to get rid of the
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fix_submap_inheritance hack and to more cleanly express the
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relationship between minibuffer-local-*-map): I've had this locally
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for a long time, but the details of the semantics is somewhat ... delicate.
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*** prog-mode could/should provide a better fill-paragraph default
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that uses syntax-tables to recognize string/comment boundaries.
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*** provide more completion-at-point-functions. Make existing
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in-buffer completion use completion-at-point.
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*** "functional" function-key-map that would make it easy to add (and
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remove) mappings like "FOO-mouse-4 -> FOO-scroll-down",
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"FOO-tab -> ?\FOO-\t", "uppercase -> lowercase", "[fringe KEY...] ->
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[KEY]", "H-FOO -> M-FOO", "C-x C-y FOO -> H-FOO", ...
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* Simple tasks. These don't require much Emacs knowledge, they are
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suitable for anyone from beginners to experts.
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** Convert modes that use view-mode to be derived from special-mode instead.
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** Major modes should have a menu entry. Examples of modes that do
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not have one at the moment and probably should: text-mode, inferior-lisp-mode.
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** Check if all items on the mode-line have a suitable tooltip for all modes.
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** edebug and debugger-mode should have a toolbar.
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It can use the same icons as gud.
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** Check what minor modes don't use define-minor-mode and convert them
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to use it.
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** Convert all defvars with leading `*' in the doc-strings into defcustoms
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of appropriate :type and :group.
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** Remove any leading `*'s from defcustom doc-strings.
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** Remove unnecessary autoload cookies from defcustoms.
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This needs a bit of care, since often people have become used to
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expecting such variables to always be defined, eg when they modify
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things in their .emacs.
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** See if other files can use generated-autoload-file (see eg ps-print).
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** Write more tests. Pick a fixed bug from the database, write a test
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case to make sure it stays fixed. Or pick your favorite programming
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major-mode, and write a test for its indentation. Or a version
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control backend, and write a test for its status parser. Etc.
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See test/automated for examples.
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* Small but important fixes needed in existing features:
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** Flymake's customization mechanism needs to be both simpler (fewer
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levels of indirection) and better documented, so it is easier to
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understand. I find it quite hard to figure out what compilation
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command it will use.
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I suggest totally rewriting that part of Flymake, using the simplest
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mechanism that suffices for the specific needs. That will be easy
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for users to customize.
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** Compute the list of active keymaps *after* reading the first event.
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** Distribute a bar cursor of width > 1 evenly between the two glyphs
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on each side of the bar (what to do at the edges?).
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** buffer-offer-save should be a permanent local.
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** revert-buffer should eliminate overlays and the mark.
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For related problems consult the thread starting with
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http://lists.gnu.org/archive/html/emacs-devel/2005-11/msg01346.html
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** erase-buffer should perhaps disregard read-only properties of text.
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** Fix the kill/yank treatment of invisible text. At the moment,
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invisible text is placed in the kill-ring, so that the contents of
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the ring may not correspond to the text as displayed to the user.
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It ought to be possible to omit text which is invisible (due to a
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text-property, overlay, or selective display) from the kill-ring.
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** Change the way define-minor-mode handles autoloading.
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It should not generate :require. Or :require in defcustom
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should not be recorded in the user's custom-set-variables call.
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** Feature to change cursor shape when Emacs is idle (for more than
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a specified time).
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** The buttons at the top of a custom buffer should not omit
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variables whose values are currently hidden.
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** Clean up the variables in browse-url. Perhaps use a shell command string to
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specify the browser instead of the mushrooming set of functions.
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See also ESR's proposal for a BROWSER environment variable
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<URL:http://www.catb.org/~esr/BROWSER/browse-url.patch>.
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** Enhance scroll-bar to handle tall line (similar to line-move).
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** In Custom buffers, put the option that turns a mode on or off first,
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using a heuristic of some kind?
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** Define recompute-arg and recompute-arg-if for fix_command to use.
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See rms message of 11 Dec 05.
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** Height returned by frame-parameter ... and height given to
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make-frame does not mean the same thing. The former includes menu and
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tool bar lines, the latter don't. frame-parameter should return height
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without menu and tool bar lines.
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** In Emacs Info, examples of using Customize should be clickable
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and they should create Custom buffers.
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** The toolbar should show keyboard equivalents in its tooltips.
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** Add function to redraw the tool bar.
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** Redesign the load-history data structure so it can cope better
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with evaluating definitions of the same function from different files,
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recording which file the latest definition came from.
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** make back_comment use syntax-ppss or equivalent.
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** Consider improving src/sysdep.c's search for a fqdn.
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http://lists.gnu.org/archive/html/emacs-devel/2007-04/msg00782.html
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** Find a proper fix for rcirc multiline nick adding.
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http://lists.gnu.org/archive/html/emacs-devel/2007-04/msg00684.html
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** Implement `network-interface-list' and `network-interface-info'
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on MS-Windows. Hint: the information is present in the Registry,
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under the keys
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HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Linkage\
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and
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HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\<device>\
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where <device> is the network device found under the first key.
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** Check for any included packages that define obsolete bug-reporting commands.
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Change them to use report-emacs-bug.
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** Allow fringe indicators to display a tooltip (provide a help-echo property?)
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** Add a defcustom that supplies a function to name numeric backup files,
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like make-backup-file-name-function for non-numeric backup files.
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** `dired-mode' should specify the semantics of `buffer-modified-p' for
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dired buffers and DTRT WRT `auto-revert-mode'.
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** Check uses of prin1 for error-handling.
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http://lists.gnu.org/archive/html/emacs-devel/2008-08/msg00456.html
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* Important features:
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** Extended text-properties (to make overlays "obsolete")
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*** Several text-property planes
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This would get us rid of font-lock-face property (and I'd be happy to
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get rid of char-property-alias-alist as well) since font-lock would
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simply use the `face' property in the `font-lock' plane.
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Each property would come with an Elisp merge-function. The merge
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would be performed in add-text-properties.
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*** zero-width text-properties.
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** Having tabs above a window to switch buffers in it.
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** "Perspectives" are named persistent window configurations. We have
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had the window configuration mechanism in GNU Emacs since the
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beginning but we have never developed a good user interface to take
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advantage of them. Eclipse's user interface seems to be good.
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Perspectives work well even if you do the equivalent of C-x 4 C-f
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because of the distinction between view windows vs file windows. In
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Emacs this is more or less the "dedicated window" feature, but we have
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never really made it work for this.
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Perspectives also need to interact with the tabs.
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** Imenu could be extended into a file-structure browsing mechanism
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using code like that of customize-groups.
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** Display something in the margin on lines that have compilation errors.
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** Compilation error navigation bar, parallel to the scroll bar,
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indicating where in the buffer there are compilation errors.
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Perhaps we could arrange to display these error indications on top
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of the scroll bar itself. That depends on to what extent toolkit
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scroll bars are extensible.
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** Provide user-friendly ways to list all available font families,
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list fonts, display a font as a sample, etc. [fx is looking at
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multilingual font selection for the Unicode branch of Emacs.]
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** Provide a convenient way to select a color with the mouse.
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** Rewrite the face code to be simpler, clearer and faster.
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** Program Enriched mode to read and save in RTF. [Is there actually a
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decent single definition of RTF? Maybe see info at
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http://latex2rtf.sourceforge.net/.] This task seems to be addressed
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by http://savannah.nongnu.org/projects/emacs-rtf/, which is still in
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very early stages.
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** Implement primitive and higher-level functions to allow filling
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properly with variable-pitch faces.
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** Implement a smoother vertical scroll facility, one that allows
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C-v to scroll through a tall image. The primitive operations
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posn-at-point and posn-at-x-y should now make it doable in elisp.
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** Implement intelligent search/replace, going beyond query-replace
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(see http://groups.csail.mit.edu/uid/projects/clustering/chi04.pdf).
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** Implement other text formatting properties.
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*** Footnotes that can appear either in place or at the end of the page.
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*** text property that says "don't break line in middle of this".
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Don't break the line between two characters that have the
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same value of this property.
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*** Discretionary hyphens that are not visible when they are at end of line.
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** Internationalize Emacs's messages.
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** Set up a facility to save backtraces when errors happen during
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specified filters, specified timers, and specified hooks.
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** Install mmc@maruska.dyndns.org's no-flicker change.
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** Add a "current vertical pixel level" value that goes with point,
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so that motion commands can also move through tall images.
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This value would be to point as window-vscroll is to window-start.
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** Address internationalization of symbols names essentially
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as documentation, e.g. in command names and Custom.
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** Make the Lucid menu widget display multilingual text. [This
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probably needs to be done from actual Emacs buffers, either directly
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in the menu or by rendering in an unmapped window and copying the
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pixels. The current code assumes a specific locale; that isn't good
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enough even if X can render the arbitrary text] [The gtk
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port now displays multilingual text in menus, but only insofar as
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Emacs can encode it as utf-8 and gtk can display the result.]
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Maybe making Lucid menus work like Gtk's (i.e. just force utf-8) is good
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enough now that Emacs can encode most chars into utf-8.
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** Remove the limitation that window and frame widths and heights can
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be only full columns/lines.
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* Other features we would like:
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** Allow frames(terminals) created by emacsclient to inherit their environment
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from the emacsclient process.
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** Remove the default toggling behavior of minor modes when called from elisp
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rather than interactively. This a trivial one-liner in easy-mode.el.
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** Give Tar mode all the features of Archive mode.
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** Create a category of errors called `process-error'
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for some or all errors associated with using subprocesses.
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** Maybe reinterpret `parse-error' as a category of errors
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and put some other errors under it.
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** A function to tell you the argument pattern of functions.
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See `function-arity' in http://www.loveshack.ukfsn.org/emacs/fx-misc.el.
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** Make byte-compile warn when a doc string is too wide.
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** Make byte-optimization warnings issue accurate line numbers.
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** A function to check for customizable options that have been
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set but not saved, and ask the user whether to save them.
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This could go in kill-emacs-query-functions, to remind people
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to save their changes. If the user says yes, show them
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in a Custom buffer using customize-customized.
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** Record the sxhash of the default value for customized variables
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and notify the user (maybe by adding a menu item or toolbar button,
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as the detection can occur during autoload time) when the default
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changes (meaning that new versions of the Lisp source with a changed
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default value got installed) and offer ediff on the respective
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customization buffers.
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** Emacs Lisp mode could put an overlay on the defun for every
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function that has advice. The overlay could have `after-text' like
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" [Function has advice]". It might look like (defun foo [Function
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has advice] (x y) The overlay could also be a button that you could
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use to view the advice.
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** Add a function to get the insertion-type of the markers in an overlay.
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** ange-ftp
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*** understand sftp
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This is hard to make work because sftp doesn't print status messages.
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*** Use MLS for ange-ftp-insert-directory if a list of files is specified.
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** Ability to map a key, including all modified-combinations.
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E.g map mouse-4 to wheel-up as well as M-mouse-4 -> M-wheel-up
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M-C-mouse-4 -> M-C-wheel-up, H-S-C-M-s-double-mouse-4 ->
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H-S-C-M-s-double-wheel-up, ...
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** Beefed-up syntax-tables.
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*** recognize multi-character syntactic entities like `begin' and `end'.
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*** nested string-delimiters (for PostScript's (foo(bar)baz) strings).
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*** support for infix operators (with precedence).
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*** support for the $ (paired delimiter) in parse-partial-sexp.
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*** support for hook-chars whose effect on the parsing-state is specified
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by elisp code. Thus a char could both close a string and open a comment
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at the same time and do it in a context-sensitive way.
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*** ability to add mode-specific data to the partial-parse-state.
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** Add a way to convert a keyboard macro to equivalent Lisp code.
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** Have a command suggestion help system that recognizes patterns
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of commands which could be replaced with a simpler common command.
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It should not make more than one suggestion per 10 minutes.
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** Add a way to define input methods by computing them (when first used)
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from other input methods. Then redefine C-x 8 to use a
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user-selected input method, with the default being the union of
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latin-1-prefix and latin-1-postfix.
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** Switch the Windows port to using Unicode keyboard input (maybe).
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Based on http://msdn2.microsoft.com/en-us/library/ms633586.aspx,
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this boils down to (1) calling RegisterClassW function to register
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Emacs windows, and (2) modifying ALL system messages to use Unicode.
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In particular, WM_CHAR messages, which result from keyboard input,
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will then come in encoded in UTF-16.
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One advantage of switching to Unicode is to toss encoded-kbd usage,
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which will solve the problem with binding non-ASCII keys with modifiers.
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Problem: using this on Windows 9x/ME requires installing the
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Microsoft Layer for Unicode (MSLU), which might not implement all
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the required functionality that is available built-in on Windows XP
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and later. We should not make this change if it would pressure
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users of unauthorized copies of older versions of Windows to
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downgrade to versions that require activation.
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** Implement a clean way to use different major modes for
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different parts of a buffer. This could be useful in editing
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Bison input files, for instance, or other kinds of text
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where one language is embedded in another language. See
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http://www.loveshack.ukfsn.org/emacs/multi-mode.el and also
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mmm-mode, as reference for approaches taken by others.
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** Arrange a way for an input method to return the first character
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immediately, then replace it later. So that C-s a with
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input method latin-1-postfix would immediately search for an a.
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** Give start-process the ability to direct standard-error
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output to a different filter.
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** Make desktop.el save the "frame configuration" of Emacs (in some
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useful sense).
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** Give desktop.el a feature to switch between different named desktops.
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** Add a cpio mode, more or less like tar mode.
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** Save undo information in special temporary files, and reload it
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when needed for undoing. This could extend undo capacity.
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** Change the Windows NT menu code
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so that it handles the deep_p argument and avoids
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regenerating the whole menu bar menu tree except
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when the user tries to use the menubar.
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This requires the RIT to forward the WM_INITMENU message to
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the main thread, and not return from that message until the main
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thread has processed the MENU_BAR_ACTIVATE_EVENT and regenerated
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the whole menu bar. In the mean time, it should process other messages.
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** Get some major packages installed: W3 (development version needs
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significant work), PSGML, _possibly_ ECB.
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http://lists.gnu.org/archive/html/emacs-devel/2007-05/msg01493.html
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Check the assignments file for other packages which might go in and
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have been missed.
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** Make keymaps a first-class Lisp object (this means a rewrite of
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keymap.c). What should it do apart from being opaque ?
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multiple inheritance ? faster where-is ? no more fix_submap_inheritance ?
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what else ?
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** Provide real menus on ttys. The MS-DOS implementation can serve as
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an example how to do part of this; see the XMenu* functions on msdos.c.
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** Implement popular parts of the rest of the CL functions as compiler
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macros in cl-macs. [Is this still relevant now that cl-lib exists?]
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** Make compiler warnings about functions that might be undefined at run time
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smarter, so that they know which files are required by the file being
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compiled and don't warn about functions defined in them.
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** Highlight rectangles (`mouse-track-rectangle-p' in XEmacs). Already in CUA,
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but it's a valuable feature worth making more general.
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** Eliminate the storm of warnings concerning char/unsigned char
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mismatches that we get with GCC 4.x and proprietary compilers on
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various systems. They make it difficult to spot the important warnings.
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** Fix anything necessary to use `long long' EMACS_INTs with GCC.
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** Split out parts of lisp.h.
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** Update the FAQ.
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** Allow auto-compression-mode to use zlib calls if zlib is available.
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[It's required for PNG, so may be linked anyhow.]
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** Add a --pristine startup flag which does -q --no-site-file plus
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ignoring X resources (Doze equivalents?) and most of the
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environment. What should not be ignored needs consideration.
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[Do the existing -Q and -D cover this, or is more needed?]
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** Improve the GC (generational, incremental). (We may be able to use
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the Boehm collector.) [See the Boehm-GC branch in CVS for work on this.]
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** Check what hooks would help Emacspeak -- see the defadvising in W3.
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** Add definitions for symbol properties, for documentation purposes.
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** Add horizontal scroll bars.
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** Provide an optional feature which computes a scroll bar slider's
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size and its position from lines instead of characters.
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** Allow unknown image types to be rendered via an external program
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converting them to, say, PBM (in the same way as PostScript?). [does
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doc-view.el do this, or could it be extended to do this?
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Does ImageMagick obsolete this idea?]
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** Allow displaying an X window from an external program in a buffer,
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e.g. to render graphics from Java applets. [gerd and/or wmperry
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thought this was feasible.]
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|
||
** Allow images (not just text) in the margin to be mouse-sensitive.
|
||
(Requires recursing through display properties). Provide some way
|
||
to simulate mouse-clicks on marginal text without a mouse.
|
||
|
||
** Implement Lisp functions to determine properly whether a character
|
||
is displayable (particularly needed in XFree 4, sigh). Use it to
|
||
define useful glyphs that may be displayed as images or unicodes
|
||
(with ASCIIfied fallback via latin1-disp). Examples include
|
||
box-drawing graphics in Custom buffers, W3 rules and tables, and
|
||
tree displays generally, mode-line mail indicator. [See work done
|
||
already for Emacs 23 and consult fx.]
|
||
|
||
** Do something to make rms happy with fx's dynamic loading, and use it
|
||
to implement things like auto-loaded buffer parsers and database
|
||
access in cases which need more than Lisp.
|
||
|
||
** Extend ps-print to deal with multiple font sizes, images, and extra
|
||
encodings.
|
||
|
||
** Provide portable undumping using mmap (per gerd design).
|
||
|
||
** Make byte-compile avoid binding an expanded defsubst's args
|
||
when the body only calls primitives.
|
||
|
||
** Use the XIE X extension, if available, for image display.
|
||
|
||
** Make monochrome images display using the foreground and background
|
||
colors of the applicable faces.
|
||
|
||
** Make `format-time-string' preserve text properties like `format'.
|
||
|
||
** Optionally make the cursor a little thinner at the end of a line
|
||
or the end of the buffer.
|
||
|
||
** Port the conservative stack marking code of Emacs' garbage collector
|
||
to more systems, so that we can completely get rid of GCPROs. Note
|
||
that Boehm garbage collector provides this.
|
||
|
||
** Reorder defcustom's in each package so that the more important
|
||
options come first in the Customize buffers. This could be done by
|
||
either rearranging the file (since options are shown in the order
|
||
they appear in the *.el files), or by adding a few :set-after attributes.
|
||
|
||
** Maybe document the features of libraries missing from the manual (or
|
||
ancillary manuals, including the Lisp manual in some cases).
|
||
This is not worth doing for all of these packages and we need not
|
||
aim for completeness, but some may be worth documenting.
|
||
|
||
Here's a list which is probably not complete/correct: align, allout,
|
||
artist, ansi-color, array, battery, calculator, cdl, cmuscheme,
|
||
completion, cua, delim-col, dirtrack, double, echistory, elide-head,
|
||
easymenu, expand, flow-ctrl, format [format-alist],
|
||
generic/generic-x [various modes], kermit, log-edit,
|
||
makesum, midnight [other than in Kill Buffer node],
|
||
mouse-copy [?], mouse-drag, mouse-sel, net-utils, rcompile,
|
||
snmp-mode [?], soundex [should be interactive?], strokes [start from
|
||
the web page], talk, thingatpt [interactive functions?], type-break,
|
||
vcursor, xscheme, zone-mode [?], mlconvert [?], iso-cvt,
|
||
feedmail [?], uce, gametree, meese, page-ext,
|
||
refbib, refer, scribe, sgml-mode, spell, texinfo, underline,
|
||
cmacexp, hideif, mantemp [obsolete?], pcomplete, xml,
|
||
cvs-status (should be described in PCL-CVS manual); other progmodes,
|
||
probably in separate manual.
|
||
|
||
** Convert the XPM bitmaps to PPM, replace the PBMs with them and scrap
|
||
the XPMs so that the color versions work generally. (Requires care
|
||
with the color used for the transparent regions.)
|
||
|
||
** Convenient access to the `values' variable. It would be nice to have an
|
||
interface that would show you the printed reps of the elements of the
|
||
list in a menu, let you select one of the values, and put it into some
|
||
other variable, without changing the value of `values'.
|
||
|
||
** (Controlled by a flag) make open and close syntax match exactly,
|
||
i.e. `(' doesn't match `]'.
|
||
|
||
** Specify parameter ID-FORMAT in all calls to `file-attributes' and
|
||
`directory-files-and-attributes' where attributes UID or GID are used.
|
||
Whenever possible, use value 'string.
|
||
When done, change meaning of default value from 'integer to 'string.
|
||
If value 'integer is used nowhere, remove the parameter ID-FORMAT from
|
||
the definition of `file-attributes' and `directory-files-and-attributes'
|
||
and from the calls.
|
||
|
||
** Make language-info-alist customizable. Currently a user can customize
|
||
only the variable `current-language-environment'.
|
||
|
||
** Improve language environment handling so that Emacs can fit
|
||
better to a users locale. Currently Emacs uses utf-8 language
|
||
environment for all utf-8 locales, thus a user in ja_JP.UTF-8 locale
|
||
are also put in utf-8 lang. env. In such a case, it is
|
||
better to use Japanese lang. env. but prefer utf-8 coding system.
|
||
|
||
** Enhance locale handling: handle language, territory and charset
|
||
orthogonally and de-emphasize language environments. Use the locale
|
||
to set up more things, such as fontsets, the default Ispell
|
||
dictionary, diary format, calendar holidays and display, quoting
|
||
characters and phrase boundaries, sentence endings, collation for
|
||
sorting (at least for unicodes), HTTP Accept-language, patterns for
|
||
directory listings and compilation messages, yes-or-no replies,
|
||
common menu items when the toolkit supports it ... `locale-info'
|
||
needs extending for LC_COLLATE &c. [fx started on this.]
|
||
|
||
** Eliminate the current restriction on header printing by ps-print.
|
||
Currently, a header can contain only single 1-byte charset in
|
||
addition to ASCII.
|
||
|
||
** In ps-print, provide an user friendly interface to specify fonts.
|
||
|
||
** Enhance word boundary detection for such a script that doesn't use
|
||
space at word boundary (e.g. Thai).
|
||
|
||
** Implement interface programs with major Japanese conversion server
|
||
in lib-src so that they can be used from the input method
|
||
"japanese". Currently, most Japanese users are using external
|
||
packages (e.g. tamago, anthy) or an input method via XIM.
|
||
|
||
** Let LEIM handle the Mode_switch key like XIM does (i.e. a toggle like C-\
|
||
but which can also be used as a modifier).
|
||
|
||
** Improve Help buffers: Change the face of previously visited links (like
|
||
Info, but also with regard to namespace), and give the value of
|
||
lisp expressions, e.g auto-mode-alist, the right face.
|
||
|
||
** Possibly make `list-holidays' eval items in the calendar-holidays variable.
|
||
See thread
|
||
<http://lists.gnu.org/archive/html/emacs-devel/2006-02/msg01034.html>.
|
||
[rgm@gnu.org will look at this after 22.1]
|
||
|
||
** Possibly make cal-dst use the system timezone database directly.
|
||
See thread
|
||
<http://lists.gnu.org/archive/html/emacs-pretest-bug/2006-11/msg00060.html>
|
||
|
||
** Possibly add a "close" button to the modeline.
|
||
The idea is to add an "X" of some kind, that when clicked deletes
|
||
the window associated with that modeline.
|
||
http://lists.gnu.org/archive/html/emacs-devel/2007-09/msg02416.html
|
||
|
||
* Things to be done for specific packages or features
|
||
|
||
** NeXTstep port
|
||
|
||
*** Bugs
|
||
|
||
**** The event loop does not redraw.
|
||
A problem is that redraw don't happen during resize,
|
||
because we can't break out from the NSapp loop during resize.
|
||
There was a special trick to detect mouse press in the lower right
|
||
corner and track mouse movements, but this did not work well, and was
|
||
not scalable to the new Lion "resize on every window edge" behavior.
|
||
[As of trunk r109635, 2012-08-15, the event loop no longer polls.]
|
||
|
||
**** (mouse-avoidance-mode 'banish) then minimize Emacs, will pop window back
|
||
up on top of all others
|
||
|
||
**** free_frame_resources, face colors
|
||
|
||
**** Numeric keysetting bug.
|
||
|
||
*** Mac-related
|
||
|
||
**** Open file:/// URLs.
|
||
|
||
**** Put frame autopositioning into C code somewhere -- if loc = same, offset.
|
||
|
||
**** Automap ctrl-mouse-1 to mouse-3.
|
||
|
||
**** Deal with Finder aliases somehow.
|
||
|
||
**** Ctrl-F2 won't pull up menus.
|
||
|
||
*** Other / Low Priority:
|
||
|
||
**** Better recognition of Unicode scripts / Greek / composition.
|
||
|
||
**** Undo for color-drag face customization.
|
||
|
||
** Bidirectional editing
|
||
|
||
*** Support reordering structured text
|
||
Two important use cases: (1) comments and strings in program sources,
|
||
and (2) text with markup, like HTML or XML.
|
||
|
||
One idea is to invent a special text property that would instruct the
|
||
display engine to reorder only the parts of buffer text covered by
|
||
that property. The display engine will then push its state onto the
|
||
iterator stack, restrict the bidi iterator to accessing only the
|
||
portion of buffer text covered by the property, reorder the text, then
|
||
pop its state from stack and continue as usual. This will require
|
||
minor changes in the bidi_it structure.
|
||
|
||
This design requires Lisp-level code to put the text properties on the
|
||
relevant parts of the buffer text. That could be done using JIT
|
||
fontifications, or as a preliminary processing when the file is
|
||
visited. With HTML/XML, the code that puts text properties needs to
|
||
pay attention to the bidi directives embedded in the HTML/XML stream.
|
||
|
||
*** Allow the user to control the direction of the UI
|
||
|
||
**** Introduce user option to control direction of mode line.
|
||
One problem is the header line, which is produced by the same routines
|
||
as the mode line. While it makes sense to have the mode-line
|
||
direction controlled by a single global variable, header lines are
|
||
buffer-specific, so they need a separate treatment in this regard.
|
||
|
||
**** User options to control direction of menu bar and tool bar.
|
||
For the tool bar, it's relatively easy: set it.paragraph_embedding
|
||
in redisplay_tool_bar according to the user variable, and make
|
||
f->desired_tool_bar_string multibyte with STRING_SET_MULTIBYTE. Some
|
||
minor changes will be needed to set the right_box_line_p and
|
||
left_box_line_p flags correctly for the R2L tool bar.
|
||
|
||
However, it makes no sense to display the tool bar right to left if
|
||
the menu bar cannot be displayed in the same direction.
|
||
|
||
R2L menu bar is tricky for the same reasons as the mode line. In
|
||
addition, toolkit builds create their menu bars in toolkit-specific
|
||
parts of code, bypassing xdisp.c, so those parts need to be enhanced
|
||
with toolkit-specific code to display the menu bar right to left.
|
||
|
||
** ImageMagick support
|
||
|
||
*** image-type-header-regexps priorities the jpeg loader over the
|
||
ImageMagick one. This is not wrong, but how should a user go about
|
||
preferring the ImageMagick loader? The user might like zooming etc in jpegs.
|
||
|
||
Try (setq image-type-header-regexps nil) for a quick hack to prefer
|
||
ImageMagick over the jpg loader.
|
||
|
||
*** For some reason its unbearably slow to look at a page in a large
|
||
image bundle using the :index feature. The ImageMagick "display"
|
||
command is also a bit slow, but nowhere near as slow as the Emacs
|
||
code. It seems ImageMagick tries to unpack every page when loading the
|
||
bundle. This feature is not the primary usecase in Emacs though.
|
||
|
||
ImageMagick 6.6.2-9 introduced a bugfix for single page djvu load. It
|
||
is now much faster to use the :index feature, but still not very fast.
|
||
|
||
*** Try to cache the num pages calculation. It can take a while to
|
||
calculate the number of pages, and if you need to do it for each page
|
||
view, page-flipping becomes uselessly slow.
|
||
|
||
*** Integrate with image-dired.
|
||
|
||
*** Integrate with docview.
|
||
|
||
*** Integrate with image-mode.
|
||
Some work has been done, e.g. M-x image-transform-fit-to-height will
|
||
fit the image to the height of the Emacs window.
|
||
|
||
*** Look for optimizations for handling images with low depth.
|
||
Currently the code seems to default to 24 bit RGB which is costly for
|
||
images with lower bit depth.
|
||
|
||
*** Decide what to do with some uncommitted imagemagick support
|
||
functions for image size etc.
|
||
|
||
** nxml mode
|
||
|
||
*** High priority
|
||
|
||
**** Command to insert an element template, including all required
|
||
attributes and child elements. When there's a choice of elements
|
||
possible, we could insert a comment, and put an overlay on that
|
||
comment that makes it behave like a button with a pop-up menu to
|
||
select the appropriate choice.
|
||
|
||
**** Command to tag a region. With a schema should complete using legal
|
||
tags, but should work without a schema as well.
|
||
|
||
**** Provide a way to conveniently rename an element. With a schema should
|
||
complete using legal tags, but should work without a schema as well.
|
||
|
||
*** Outlining
|
||
|
||
**** Implement C-c C-o C-q.
|
||
|
||
**** Install pre/post command hook for moving out of invisible section.
|
||
|
||
**** Put a modify hook on invisible sections that expands them.
|
||
|
||
**** Integrate dumb folding somehow.
|
||
|
||
**** An element should be able to be its own heading.
|
||
|
||
**** Optimize to avoid complete buffer scan on each command.
|
||
|
||
**** Make it work with HTML-style headings (i.e. level indicated by
|
||
name of heading element rather than depth of section nesting).
|
||
|
||
**** Recognize root element as a section provided it has a title, even
|
||
if it doesn't match section-element-name-regex.
|
||
|
||
**** Support for incremental search automatically making hidden text visible.
|
||
|
||
**** Allow title to be an attribute.
|
||
|
||
**** Command that says to recognize the tag at point as a section/heading.
|
||
|
||
**** Explore better ways to determine when an element is a section
|
||
or a heading.
|
||
|
||
**** rng-next-error needs to either ignore invisible portion or reveal it
|
||
(maybe use isearch oriented text properties).
|
||
|
||
**** Errors within hidden section should be highlighted by underlining the
|
||
ellipsis.
|
||
|
||
**** Make indirect buffers work.
|
||
|
||
**** How should nxml-refresh outline recover from non well-formed tags?
|
||
|
||
**** Hide tags in title elements?
|
||
|
||
**** Use overlays instead of text properties for holding outline state?
|
||
Necessary for indirect buffers to work?
|
||
|
||
**** Allow an outline to go in the speedbar.
|
||
|
||
**** Split up outlining manual section into subsections.
|
||
|
||
**** More detail in the manual about each outlining command.
|
||
|
||
**** More menu entries for hiding/showing?
|
||
|
||
**** Indication of many lines have been hidden?
|
||
|
||
*** Locating schemas
|
||
|
||
**** Should rng-validate-mode give the user an opportunity to specify a
|
||
schema if there is currently none? Or should it at least give a hint
|
||
to the user how to specify a non-vacuous schema?
|
||
|
||
**** Support for adding new schemas to schema-locating files.
|
||
Add documentElement and namespace elements.
|
||
|
||
**** C-c C-w should be able to report current type id.
|
||
|
||
**** Implement doctypePublicId.
|
||
|
||
**** Implement typeIdBase.
|
||
|
||
**** Implement typeIdProcessingInstruction.
|
||
|
||
**** Support xml:base.
|
||
|
||
**** Implement group.
|
||
|
||
**** Find preferred prefix from schema-locating files. Get rid of
|
||
rng-preferred-prefix-alist.
|
||
|
||
**** Inserting document element with vacuous schema should complete using
|
||
document elements declared in schema locating files, and set schema
|
||
appropriately.
|
||
|
||
**** Add a ruleType attribute to the <include> element?
|
||
|
||
**** Allow processing instruction in prolog to contain the compact syntax
|
||
schema directly.
|
||
|
||
**** Use RDDL to locate a schema based on the namespace URI.
|
||
|
||
**** Should not prompt to add redundant association to schema locating file.
|
||
|
||
**** Command to reload current schema.
|
||
|
||
*** Schema-sensitive features
|
||
|
||
**** Should filter dynamic markup possibilities using schema validity, by
|
||
adding hook to nxml-mode.
|
||
|
||
**** Dynamic markup word should (at least optionally) be able to look in
|
||
other buffers that are using nxml-mode.
|
||
|
||
**** Should clicking on Invalid move to next error if already on an error?
|
||
|
||
**** Take advantage of a:documentation. Needs change to schema format.
|
||
|
||
**** Provide feasible validation (as in Jing) toggle.
|
||
|
||
**** Save the validation state as a property on the error overlay to enable
|
||
more detailed diagnosis.
|
||
|
||
**** Provide an Error Summary buffer showing all the validation errors.
|
||
|
||
**** Pop-up menu. What is useful? Tag a region (should be grayed out if
|
||
the region is not balanced). Suggestions based on error messages.
|
||
|
||
**** Have configurable list of namespace URIs so that we can provide
|
||
namespace URI completion on extension elements or with schema-less documents.
|
||
|
||
**** Allow validation to handle XInclude.
|
||
|
||
**** ID/IDREF support.
|
||
|
||
*** Completion
|
||
|
||
**** Make it work with icomplete. Only use a function to complete when
|
||
some of the possible names have undeclared namespaces.
|
||
|
||
**** How should C-return in mixed text work?
|
||
|
||
**** When there's a vacuous schema, C-return after < will insert the end-tag.
|
||
Is this a bug or a feature?
|
||
|
||
**** After completing start-tag, ensure we don't get unhelpful message
|
||
from validation
|
||
|
||
**** Syntax table for completion.
|
||
|
||
**** Should complete start-tag name with a space if namespace attributes
|
||
are required.
|
||
|
||
**** When completing start-tag name with no prefix and it doesn't match
|
||
should try to infer namespace from local name.
|
||
|
||
**** Should completion pay attention to characters after point? If so, how?
|
||
|
||
**** When completing start-tag name, add required atts if only one required
|
||
attribute.
|
||
|
||
**** When completing attribute name, add attribute value if only one value
|
||
is possible.
|
||
|
||
**** After attribute-value completion, insert space after close delimiter
|
||
if more attributes are required.
|
||
|
||
**** Complete on enumerated data values in elements.
|
||
|
||
**** When in context that allows only elements, should get tag
|
||
completion without having to type < first.
|
||
|
||
**** When immediately after start-tag name, and name is valid and not
|
||
prefix of any other name, should C-return complete on attribute names?
|
||
|
||
**** When completing attributes, more consistent to ignore all attributes
|
||
after point.
|
||
|
||
**** Inserting attribute value completions needs to be sensitive to what
|
||
delimiter is used so that it quotes the correct character.
|
||
|
||
**** Complete on encoding-names in XML decl.
|
||
|
||
**** Complete namespace declarations by searching for all namespaces
|
||
mentioned in the schema.
|
||
|
||
*** Well-formed XML support
|
||
|
||
**** Deal better with Mule-UCS
|
||
|
||
**** Deal with UTF-8 BOM when reading.
|
||
|
||
**** Complete entity names.
|
||
|
||
**** Provide some support for entity names for MathML.
|
||
|
||
**** Command to repeat the last tag.
|
||
|
||
**** Support for changing between character references and characters.
|
||
Need to check that context is one in which character references are
|
||
allowed. xmltok prolog parsing will need to distinguish parameter
|
||
literals from other kinds of literal.
|
||
|
||
**** Provide a comment command to bind to M-; that works better than the
|
||
normal one.
|
||
|
||
**** Make indenting in a multi-line comment work.
|
||
|
||
**** Structure view. Separate buffer displaying element tree.
|
||
Be able to navigate from structure view to document and vice-versa.
|
||
|
||
**** Flash matching >.
|
||
|
||
**** Smart selection command that selects increasingly large syntactically
|
||
coherent chunks of XML. If point is in an attribute value, first
|
||
select complete value; then if command is repeated, select value plus
|
||
delimiters, then select attribute name as well, then complete
|
||
start-tag, then complete element, then enclosing element, etc.
|
||
|
||
**** ispell integration.
|
||
|
||
**** Block-level items in mixed content should be indented, e.g:
|
||
<para>This is list:
|
||
<ul>
|
||
<li>item</li>
|
||
|
||
**** Provide option to indent like this:
|
||
<para>This is a paragraph
|
||
occupying multiple lines.</para>
|
||
|
||
**** Option to add make a / that closes a start-tag electrically insert a
|
||
space for the XHTML guys.
|
||
|
||
**** C-M-q should work.
|
||
|
||
*** Datatypes
|
||
|
||
**** Figure out workaround for CJK characters with regexps.
|
||
|
||
**** Does category C contain Cn?
|
||
|
||
**** Do ENTITY datatype properly.
|
||
|
||
*** XML Parsing Library
|
||
|
||
**** Parameter entity parsing option, nil (never), t (always),
|
||
unless-standalone (unless standalone="yes" in XML declaration).
|
||
|
||
**** When a file is currently being edited, there should be an option to
|
||
use its buffer instead of the on-disk copy.
|
||
|
||
*** Handling all XML features
|
||
|
||
**** Provide better support for editing external general parsed entities.
|
||
Perhaps provide a way to force ignoring undefined entities; maybe turn
|
||
this on automatically with <?xml encoding=""?> (with no version
|
||
pseudo-att).
|
||
|
||
**** Handle internal general entity declarations containing elements.
|
||
|
||
**** Handle external general entity declarations.
|
||
|
||
**** Handle default attribute declarations in internal subset.
|
||
|
||
**** Handle parameter entities (including DTD).
|
||
|
||
*** RELAX NG
|
||
|
||
**** Do complete schema checking, at least optionally.
|
||
|
||
**** Detect include/external loops during schema parse.
|
||
|
||
**** Coding system detection for schemas. Should use utf-8/utf-16 per the
|
||
spec. But also need to allow encodings other than UTF-8/16 to support
|
||
CJK charsets that Emacs cannot represent in Unicode.
|
||
|
||
*** Catching XML errors
|
||
|
||
**** Check public identifiers.
|
||
|
||
**** Check default attribute values.
|
||
|
||
*** Performance
|
||
|
||
**** Explore whether overlay-recenter can cure overlays performance problems.
|
||
|
||
**** Cache schemas. Need to have list of files and mtimes.
|
||
|
||
**** Make it possible to reduce rng-validate-chunk-size significantly,
|
||
perhaps to 500 bytes, without bad performance impact: don't do
|
||
redisplay on every chunk; pass continue functions on other uses of
|
||
rng-do-some-validation.
|
||
|
||
**** Cache after first tag.
|
||
|
||
**** Introduce a new name class that is a choice between names (so that
|
||
we can use member)
|
||
|
||
**** intern-choice should simplify after patterns with same 1st/2nd args
|
||
|
||
**** Large numbers of overlays slow things down dramatically. Represent
|
||
errors using text properties. This implies we cannot incrementally
|
||
keep track of the number of errors, in order to determine validity.
|
||
Instead, when validation completes, scan for any characters with an
|
||
error text property; this seems to be fast enough even with large
|
||
buffers. Problem with error at end of buffer, where there's no
|
||
character; need special variable for this. Need to merge face from
|
||
font-lock with the error face: use :inherit attribute with list of two
|
||
faces. How do we avoid making rng-valid depend on nxml-mode?
|
||
|
||
*** Error recovery
|
||
|
||
**** Don't stop at newline in looking for close of start-tag.
|
||
|
||
**** Use indentation to guide recovery from mismatched end-tags
|
||
|
||
**** Don't keep parsing when currently not well-formed but previously
|
||
well-formed
|
||
|
||
**** Try to recover from a bad start-tag by popping an open element if
|
||
there was a mismatched end-tag unaccounted for.
|
||
|
||
**** Try to recover from a bad start-tag open on the hypothesis that there
|
||
was an error in the namespace URI.
|
||
|
||
**** Better recovery from ill-formed XML declarations.
|
||
|
||
*** Usability improvements
|
||
|
||
**** Should print a "Parsing..." message during long movements.
|
||
|
||
**** Provide better position for reference to undefined pattern error.
|
||
|
||
**** Put Well-formed in the mode-line when validating against any-content.
|
||
|
||
**** Trim marking of illegal data for leading and trailing whitespace.
|
||
|
||
**** Show Invalid status as soon as we are sure it's invalid, rather than
|
||
waiting for everything to be completely up to date.
|
||
|
||
**** When narrowed, Valid or Invalid status should probably consider only
|
||
validity of narrowed region.
|
||
|
||
*** Bug fixes
|
||
|
||
**** Need to give an error for a document like: <foo/><![CDATA[ ]]>
|
||
|
||
**** Make nxml-forward-balanced-item work better for the prolog.
|
||
|
||
**** Make filling and indenting comments work in the prolog.
|
||
|
||
**** Should delete RNC Input buffers.
|
||
|
||
**** Figure out what regex use for NCName and use it consistently,
|
||
|
||
**** Should have not-well-formed tokens in ref.
|
||
|
||
**** Require version in XML declaration? Probably not because prevents
|
||
use for external parsed entities. At least forbid standalone without version.
|
||
|
||
**** Reject schema that compiles to rng-not-allowed-ipattern.
|
||
|
||
**** Move point backwards on schema parse error so that it's on the right token.
|
||
|
||
*** Internal
|
||
|
||
**** Use rng-quote-string consistently.
|
||
|
||
**** Use parsing library for XML to texinfo conversion.
|
||
|
||
**** Rename xmltok.el to nxml-token.el. Use nxml-t- prefix instead of
|
||
xmltok-. Change nxml-t-type to nxml-t-token-type, nxml-t-start to
|
||
nxml-t-token-start.
|
||
|
||
**** Can we set fill-prefix to nil and rely on indenting?
|
||
|
||
**** xmltok should make available replacement text of entities containing
|
||
elements
|
||
|
||
**** In rng-valid, instead of using modification-hooks and
|
||
insert-behind-hooks on dependent overlays, use same technique as nxml-mode.
|
||
|
||
**** Port to XEmacs. Issues include: Unicode (XEmacs seems to be based on
|
||
Mule-UCS); overlays/text properties vs extents; absence of
|
||
fontification-functions hook.
|
||
|
||
*** Fontification
|
||
|
||
**** Allow face to depend on element qname, attribute qname, attribute
|
||
value. Use list with pairs of (R . F), where R specifies regexps and
|
||
F specifies faces. How can this list be made to depend on the document type?
|
||
|
||
*** Other
|
||
|
||
**** Support RELAX NG XML syntax (use XML parsing library).
|
||
|
||
**** Support W3C XML Schema (use XML parsing library).
|
||
|
||
**** Command to infer schema from current document (like trang).
|
||
|
||
*** Schemas
|
||
|
||
**** XSLT schema should take advantage of RELAX NG to express cooccurrence
|
||
constraints on attributes (e.g. xsl:template).
|
||
|
||
*** Documentation
|
||
|
||
**** Move material from README to manual.
|
||
|
||
**** Document encodings.
|
||
|
||
*** Notes
|
||
|
||
**** How can we allow an error to be displayed on a different token from
|
||
where it is detected? In particular, for a missing closing ">" we
|
||
will need to display it at the beginning of the following token. At the
|
||
moment, when we parse the following token the error overlay will get cleared.
|
||
|
||
**** How should rng-goto-next-error deal with narrowing?
|
||
|
||
**** Perhaps should merge errors having same start position even if they
|
||
have different ends.
|
||
|
||
**** How to handle surrogates? One possibility is to be compatible with
|
||
utf8.e: represent as sequence of 4 chars. But utf-16 is incompatible
|
||
with this.
|
||
|
||
**** Should we distinguish well-formedness errors from invalidity errors?
|
||
(I think not: we may want to recover from a bad start-tag by implying
|
||
an end-tag.)
|
||
|
||
**** Seems to be a bug with Emacs, where a mouse movement that causes
|
||
help-echo text to appear counts as pending input but does not cause
|
||
idle timer to be restarted.
|
||
|
||
**** Use XML to represent this file.
|
||
|
||
**** I had a TODO which said simply "split-string". What did I mean?
|
||
|
||
**** Investigate performance on large files all on one line.
|
||
|
||
*** Issues for Emacs versions >= 22
|
||
|
||
**** Take advantage of UTF-8 CJK support.
|
||
|
||
**** Supply a next-error-function.
|
||
|
||
**** Investigate this NEWS item "Emacs now tries to set up buffer coding
|
||
systems for HTML/XML files automatically."
|
||
|
||
**** Take advantage of the pointer text property.
|
||
|
||
**** Leverage char-displayable-p.
|
||
|
||
* Internal changes
|
||
|
||
** Cleanup all the GC_ mark bit stuff -- there is no longer any distinction
|
||
since the mark bit is no longer stored in the Lisp_Object itself.
|
||
|
||
** Refine the `predicate' arg to read-file-name.
|
||
Currently, it mixes up the predicate to apply when doing completion and the
|
||
one to use when terminating the selection.
|
||
|
||
** Merge ibuffer.el and buff-menu.el.
|
||
More specifically do what's needed to make ibuffer.el the default,
|
||
or just an extension of buff-menu.el.
|
||
|
||
** Use pcomplete by default in shell-mode.
|
||
This means to make it behave (by default) more like the current code.
|
||
Use it also for read-shell-command, M-x compile, ...
|
||
|
||
** Merge sendmail.el and messages.el.
|
||
Probably not a complete merge, but at least arrange for messages.el to be
|
||
a derived mode of sendmail.el. Or arrange for messages.el to be split
|
||
into a small core and "the rest" so that we use less resources as long as
|
||
we stick to the features provided in sendmail.el.
|
||
|
||
** Replace gmalloc.c with the modified Doug Lea code from the current
|
||
GNU libc so that the special mmapping of buffers can be removed --
|
||
that apparently loses under Solaris, at least. [fx has mostly done
|
||
this.]
|
||
|
||
** Rewrite make-docfile to be clean and maintainable.
|
||
It might be better to replace it with Lisp, using the byte compiler.
|
||
http://lists.gnu.org/archive/html/emacs-devel/2012-06/msg00037.html
|
||
|
||
** Add an inferior-comint-minor-mode to capture the common set of operations
|
||
offered by major modes that offer an associated inferior
|
||
comint-derived mode. I.e. basically make cmuscheme.el/inf-lisp.el generic.
|
||
For use by sml-mode, python-mode, tex-mode, scheme-mode, lisp-mode,
|
||
haskell-mode, tuareg-mode, ...
|
||
|
||
** Add "link" button class
|
||
Add a standard button-class named "link", and make all other link-like
|
||
button classes inherit from it. Set the default face of the "link" button
|
||
class to the standard "link" face.
|
||
|
||
* Wishlist items:
|
||
|
||
** Maybe replace etags.c with a Lisp implementation.
|
||
http://lists.gnu.org/archive/html/emacs-devel/2012-06/msg00354.html
|
||
|
||
** Maybe replace lib-src/rcs2log with a Lisp implementation.
|
||
It wouldn't have to be a complete replacement, just enough
|
||
for vc-rcs-update-changelog.
|
||
|
||
* Other known bugs:
|
||
|
||
** `make-frame' forgets unhandled parameters, at least for X11 frames.
|
||
|
||
** a two-char comment-starter whose two chars are symbol constituents will
|
||
not be noticed if it appears within a word.
|
||
|
||
** Fix unexelf.c to handle the .data.rel and .data.rel.local
|
||
sections made by GCC 3.4 on IRIX.
|
||
|
||
|
||
This file is part of GNU Emacs.
|
||
|
||
GNU Emacs is free software: you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation, either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
GNU Emacs is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
|