Mercurial > hg > xemacs-beta
annotate etc/ETAGS.EBNF @ 5043:d0c14ea98592
various frame-geometry fixes
-------------------- ChangeLog entries follow: --------------------
src/ChangeLog addition:
2010-02-15 Ben Wing <ben@xemacs.org>
* EmacsFrame.c:
* EmacsFrame.c (EmacsFrameResize):
* console-msw-impl.h:
* console-msw-impl.h (struct mswindows_frame):
* console-msw-impl.h (FRAME_MSWINDOWS_TARGET_RECT):
* device-tty.c:
* device-tty.c (tty_asynch_device_change):
* event-msw.c:
* event-msw.c (mswindows_wnd_proc):
* faces.c (Fface_list):
* faces.h:
* frame-gtk.c:
* frame-gtk.c (gtk_set_initial_frame_size):
* frame-gtk.c (gtk_set_frame_size):
* frame-msw.c:
* frame-msw.c (mswindows_init_frame_1):
* frame-msw.c (mswindows_set_frame_size):
* frame-msw.c (mswindows_size_frame_internal):
* frame-msw.c (msprinter_init_frame_3):
* frame.c:
* frame.c (enum):
* frame.c (Fmake_frame):
* frame.c (adjust_frame_size):
* frame.c (store_minibuf_frame_prop):
* frame.c (Fframe_property):
* frame.c (Fframe_properties):
* frame.c (Fframe_displayable_pixel_height):
* frame.c (Fframe_displayable_pixel_width):
* frame.c (internal_set_frame_size):
* frame.c (Fset_frame_height):
* frame.c (Fset_frame_pixel_height):
* frame.c (Fset_frame_displayable_pixel_height):
* frame.c (Fset_frame_width):
* frame.c (Fset_frame_pixel_width):
* frame.c (Fset_frame_displayable_pixel_width):
* frame.c (Fset_frame_size):
* frame.c (Fset_frame_pixel_size):
* frame.c (Fset_frame_displayable_pixel_size):
* frame.c (frame_conversion_internal_1):
* frame.c (get_frame_displayable_pixel_size):
* frame.c (change_frame_size_1):
* frame.c (change_frame_size):
* frame.c (generate_title_string):
* frame.h:
* gtk-xemacs.c:
* gtk-xemacs.c (gtk_xemacs_size_request):
* gtk-xemacs.c (gtk_xemacs_size_allocate):
* gtk-xemacs.c (gtk_xemacs_paint):
* gutter.c:
* gutter.c (update_gutter_geometry):
* redisplay.c (end_hold_frame_size_changes):
* redisplay.c (redisplay_frame):
* toolbar.c:
* toolbar.c (update_frame_toolbars_geometry):
* window.c:
* window.c (frame_pixsize_valid_p):
* window.c (check_frame_size):
Various fixes to frame geometry to make it a bit easier to understand
and fix some bugs.
1. IMPORTANT: Some renamings. Will need to be applied carefully to
the carbon repository, in the following order:
-- pixel_to_char_size -> pixel_to_frame_unit_size
-- char_to_pixel_size -> frame_unit_to_pixel_size
-- pixel_to_real_char_size -> pixel_to_char_size
-- char_to_real_pixel_size -> char_to_pixel_size
-- Reverse second and third arguments of change_frame_size() and
change_frame_size_1() to try to make functions consistent in
putting width before height.
-- Eliminate old round_size_to_char, because it didn't really
do anything differently from round_size_to_real_char()
-- round_size_to_real_char -> round_size_to_char; any places that
called the old round_size_to_char should just call the new one.
2. IMPORTANT FOR CARBON: The set_frame_size() method is now passed
sizes in "frame units", like all other frame-sizing functions,
rather than some hacked-up combination of char-cell units and
total pixel size. This only affects window systems that use
"pixelated geometry", and I'm not sure if Carbon is one of them.
MS Windows is pixelated, X and GTK are not. For pixelated-geometry
systems, the size in set_frame_size() is in displayable pixels
rather than total pixels and needs to be converted appropriately;
take a look at the changes made to mswindows_set_frame_size()
method if necessary.
3. Add a big long comment in frame.c describing how frame geometry
works.
4. Remove MS Windows-specific character height and width fields,
duplicative and unused.
5. frame-displayable-pixel-* and set-frame-displayable-pixel-*
didn't use to work on MS Windows, but they do now.
6. In general, clean up the handling of "pixelated geometry" so
that fewer functions have to worry about this. This is really
an abomination that should be removed entirely but that will
have to happen later. Fix some buggy code in
frame_conversion_internal() that happened to "work" because it
was countered by oppositely buggy code in change_frame_size().
7. Clean up some frame-size code in toolbar.c and use functions
already provided in frame.c instead of rolling its own.
8. Fix check_frame_size() in window.c, which formerly didn't take
pixelated geometry into account.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Mon, 15 Feb 2010 22:14:11 -0600 |
| parents | a827a51c3241 |
| children | 308d34e9f07d |
| rev | line source |
|---|---|
| 2225 | 1 -*- indented-text -*- |
| 2 | |
| 3876 | 3 See the end of this file for copyright information. |
| 4 | |
| 2225 | 5 This file contains two sections: |
| 6 | |
| 2554 | 7 1) An EBNF (Extended Backus-Naur Form) description of the format of |
| 2225 | 8 the tags file created by etags.c and interpreted by etags.el; |
| 9 2) A discussion of tag names and implicit tag names. | |
| 10 | |
| 11 ====================== 1) EBNF tag file description ===================== | |
| 12 | |
| 13 Productions created from current behaviour to aid extensions | |
| 14 Francesco Potorti` <pot@gnu.org> 2002 | |
| 15 ---------------- | |
| 16 | |
| 17 FF ::= #x0c /* tag section starter */ | |
| 18 | |
| 19 LF ::= #x0a /* line terminator */ | |
| 20 | |
| 21 DEL ::= #x7f /* pattern terminator */ | |
| 22 | |
| 23 SOH ::= #x01 /* name terminator */ | |
| 24 | |
| 25 regchar ::= [^#x0a#x0c#x7f] /* regular character */ | |
| 26 | |
| 27 regstring ::= { regchar } /* regular string */ | |
| 28 | |
| 29 unsint ::= [0-9] { [0-9] } /* non-negative integer */ | |
| 30 | |
| 31 | |
| 32 | |
| 33 tagfile ::= { tagsection } /* a tags file */ | |
| 34 | |
| 35 tagsection ::= FF LF ( includesec | regularsec ) LF | |
| 36 | |
| 37 includesec ::= filename ",include" [ LF fileprop ] | |
| 38 | |
| 39 regularsec ::= filename "," [ unsint ] [ LF fileprop ] { LF tag } | |
| 40 | |
| 41 filename ::= regchar regstring /* a file name */ | |
| 42 | |
| 43 fileprop ::= "(" regstring ")" /* an elisp alist */ | |
| 44 | |
| 45 tag ::= directtag | patterntag | |
| 46 | |
| 47 directtag ::= DEL realposition /* no pattern */ | |
| 48 | |
| 49 patterntag ::= pattern DEL [ tagname SOH ] position | |
| 50 | |
| 51 pattern ::= regstring /* a tag pattern */ | |
| 52 | |
| 53 tagname ::= regchar regstring /* a tag name */ | |
| 54 | |
| 55 position ::= realposition | "," /* charpos,linepos */ | |
| 56 | |
| 57 realposition ::= "," unsint | unsint "," | unsint "," unsint | |
| 58 | |
| 59 ==================== end of EBNF tag file description ==================== | |
| 60 | |
| 61 | |
| 62 | |
| 63 ======================= 2) discussion of tag names ======================= | |
| 64 | |
| 65 - WHAT ARE TAG NAMES | |
| 66 Tag lines in a tags file are usually made from the above defined pattern | |
| 67 and by an optional tag name. The pattern is a string that is searched | |
| 68 in the source file to find the tagged line. | |
| 69 | |
| 70 - WHY TAG NAMES ARE GOOD | |
| 71 When a user looks for a tag, Emacs first compares the tag with the tag | |
| 72 names contained in the tags file. If no match is found, Emacs compares | |
| 73 the tag with the patterns. The tag name is then the preferred way to | |
| 74 look for tags in the tags file, because when the tag name is present | |
| 75 Emacs can find a tag faster and more accurately. These tag names are | |
| 76 part of tag lines in the tags file, so we call them "explicit". | |
| 77 | |
| 78 - WHY IMPLICIT TAG NAMES ARE EVEN BETTER | |
| 79 When a tag line has no name, but a name can be deduced from the pattern, | |
| 80 we say that the tag line has an implicit tag name. Often tag names are | |
| 81 redundant; this happens when the name of a tag is an easily guessable | |
| 82 substring of the tag pattern. We define a set of rules to decide | |
| 83 whether it is possible to deduce the tag name from the pattern, and make | |
| 84 an unnamed tag in those cases. The name deduced from the pattern of an | |
| 85 unnamed tag is the implicit name of that tag. | |
| 2325 | 86 When the user looks for a tag, and Emacs finds no explicit tag names |
| 2225 | 87 that match it, Emacs then looks for an tag whose implicit tag name |
| 88 matches the request. etags.c uses implicit tag names when possible, in | |
| 89 order to reduce the size of the tags file. | |
| 90 An implicit tag name is deduced from the pattern by discarding the | |
| 91 last character if it is one of ` \f\t\n\r()=,;', then taking all the | |
| 92 rightmost consecutive characters in the pattern which are not one of | |
| 93 those. | |
| 94 | |
| 95 ===================== end of discussion of tag names ===================== | |
| 3876 | 96 |
| 97 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 | |
| 98 Free Software Foundation, Inc. | |
| 99 | |
| 100 COPYING PERMISSIONS: | |
| 101 | |
| 102 This document is free software; you can redistribute it and/or modify | |
| 103 it under the terms of the GNU General Public License as published by | |
| 104 the Free Software Foundation; either version 2 of the License, or | |
| 105 (at your option) any later version. | |
| 106 | |
| 107 This program is distributed in the hope that it will be useful, | |
| 108 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 109 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 110 GNU General Public License for more details. | |
| 111 | |
| 112 You should have received a copy of the GNU General Public License | |
| 113 along with this program; if not, write to the Free Software | |
| 114 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |