Mercurial > hg > xemacs-beta
annotate lisp/gutter.el @ 5700:37479d841681
Fix subsetp based on patch by Benson and Steven Mitchell.
Add appropriate short-circuits for null set arguments.
Add tests (mostly from Steven Mitchell) to test suite.
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Mon, 24 Dec 2012 14:12:51 +0900 |
| parents | cc6f0266bc36 |
| children |
| rev | line source |
|---|---|
| 442 | 1 ;;; gutter.el --- Gutter manipulation for XEmacs. |
| 2 | |
| 3 ;; Copyright (C) 1999 Free Software Foundation, Inc. | |
| 4 ;; Copyright (C) 1999, 2000 Andy Piper. | |
| 5 | |
| 6 ;; Maintainer: XEmacs Development Team | |
| 7 ;; Keywords: frames, gui, internal, dumped | |
| 8 | |
| 9 ;; This file is part of XEmacs. | |
| 10 | |
|
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11 ;; XEmacs is free software: you can redistribute it and/or modify it |
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12 ;; under the terms of the GNU General Public License as published by the |
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13 ;; Free Software Foundation, either version 3 of the License, or (at your |
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14 ;; option) any later version. |
| 442 | 15 |
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16 ;; XEmacs is distributed in the hope that it will be useful, but WITHOUT |
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17 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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18 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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19 ;; for more details. |
| 442 | 20 |
| 21 ;; You should have received a copy of the GNU General Public License | |
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22 ;; along with XEmacs. If not, see <http://www.gnu.org/licenses/>. |
| 442 | 23 |
| 24 ;; Some of this is taken from the buffer-menu stuff in menubar-items.el | |
| 25 ;; and the custom specs in toolbar.el. | |
| 26 | |
| 27 (defgroup gutter nil | |
| 28 "Input from the gutters." | |
| 29 :group 'environment) | |
| 30 | |
| 31 ;; Although these customizations appear bogus, they are necessary in | |
| 32 ;; order to be able to save options through the options menu. | |
| 33 (defcustom default-gutter-position | |
| 34 (default-gutter-position) | |
| 35 "The location of the default gutter. It can be 'top, 'bottom, 'left or | |
| 36 'right. This option should be customized through the options menu. | |
| 37 To set the gutter position explicitly use `set-default-gutter-position'" | |
| 38 :group 'gutter | |
| 39 :type '(choice (const :tag "top" top) | |
| 40 (const :tag "bottom" bottom) | |
| 41 (const :tag "left" left) | |
| 42 (const :tag "right" right)) | |
| 43 :set #'(lambda (var val) | |
| 44 (set-default-gutter-position val) | |
| 45 (setq default-gutter-position val))) | |
| 46 | |
| 47 ;;; Gutter helper functions | |
| 48 | |
| 49 ;; called by Fset_default_gutter_position() | |
| 50 (defvar default-gutter-position-changed-hook nil | |
| 51 "Function or functions to be called when the gutter position is changed. | |
| 52 The value of this variable may be buffer-local.") | |
| 53 | |
| 54 ;; called by set-gutter-element-visible-p | |
| 55 (defvar gutter-element-visibility-changed-hook nil | |
| 56 "Function or functions to be called when the visibility of an | |
| 57 element in the gutter changes. The value of this variable may be | |
| 58 buffer-local. The gutter element symbol is passed as an argument to | |
| 59 the hook, as is the visibility flag.") | |
| 60 | |
| 444 | 61 (defun set-gutter-element (gutter-specifier prop value &optional locale tag-set) |
| 62 "Set GUTTER-SPECIFIER gutter element PROP to VALUE in optional LOCALE. | |
| 442 | 63 This is a convenience function for setting gutter elements. |
| 444 | 64 VALUE in general must be a string. If VALUE is a glyph then a string |
| 65 will be created to put the glyph into." | |
| 66 (let ((spec value)) | |
| 67 (when (glyphp value) | |
| 442 | 68 (setq spec (copy-sequence "\n")) |
| 444 | 69 (set-extent-begin-glyph (make-extent 0 1 spec) value)) |
| 442 | 70 (map-extents #'(lambda (extent arg) |
| 71 (set-extent-property extent 'duplicable t)) spec) | |
| 72 (modify-specifier-instances gutter-specifier #'plist-put (list prop spec) | |
| 73 'force nil locale tag-set))) | |
| 74 | |
| 75 (defun remove-gutter-element (gutter-specifier prop &optional locale tag-set) | |
| 76 "Remove gutter element PROP from GUTTER-SPECIFIER in optional LOCALE. | |
| 77 This is a convenience function for removing gutter elements." | |
| 78 (modify-specifier-instances gutter-specifier #'plist-remprop (list prop) | |
| 79 'force nil locale tag-set)) | |
| 80 | |
| 81 (defun set-gutter-element-visible-p (gutter-visible-specifier-p | |
| 82 prop &optional visible-p | |
| 83 locale tag-set) | |
| 84 "Change the visibility of gutter elements. | |
| 85 Set the visibility of element PROP to VISIBLE-P for | |
| 86 GUTTER-SPECIFIER-VISIBLE-P in optional LOCALE. | |
| 87 This is a convenience function for hiding and showing gutter elements." | |
| 88 (modify-specifier-instances | |
| 89 gutter-visible-specifier-p #'(lambda (spec prop visible-p) | |
| 90 (if (consp spec) | |
| 91 (if visible-p | |
| 92 (if (memq prop spec) spec | |
| 93 (cons prop spec)) | |
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94 (delete* prop spec)) |
| 442 | 95 (if visible-p (list prop)))) |
| 96 (list prop visible-p) | |
| 97 'force nil locale tag-set) | |
| 98 (run-hook-with-args 'gutter-element-visibility-changed-hook prop visible-p)) | |
| 99 | |
| 100 (defun gutter-element-visible-p (gutter-visible-specifier-p | |
| 101 prop &optional domain) | |
| 102 "Determine whether a gutter element is visible. | |
| 103 Given GUTTER-VISIBLE-SPECIFIER-P and gutter element PROP, return | |
| 104 non-nil if it is visible in optional DOMAIN." | |
| 105 (let ((spec (specifier-instance gutter-visible-specifier-p domain))) | |
| 106 (or (and (listp spec) (memq 'buffers-tab spec)) | |
| 107 spec))) | |
| 108 | |
| 458 | 109 (defun set-gutter-dirty-p (gutter-or-location) |
| 110 "Make GUTTER-OR-LOCATION dirty to force redisplay updates." | |
| 111 ;; set-glyph-image will not make the gutter dirty | |
| 112 (when (or (gutter-specifier-p gutter-or-location) | |
| 113 (eq gutter-or-location 'top) | |
| 114 (eq gutter-or-location 'bottom) | |
| 115 (eq gutter-or-location 'left) | |
| 116 (eq gutter-or-location 'right)) | |
| 117 (or (gutter-specifier-p gutter-or-location) | |
| 118 (setq gutter-or-location | |
| 119 (eval (intern (concat | |
| 120 (symbol-name gutter-or-location) | |
| 121 "-gutter"))))) | |
| 122 (set-specifier-dirty-flag gutter-or-location))) | |
| 123 | |
| 442 | 124 (defun make-gutter-specifier (spec-list) |
| 125 "Return a new `gutter' specifier object with the given specification list. | |
| 126 SPEC-LIST can be a list of specifications (each of which is a cons of a | |
| 127 locale and a list of instantiators), a single instantiator, or a list | |
| 128 of instantiators. See `make-specifier' for more information about | |
| 129 specifiers. | |
| 130 | |
| 131 Gutter specifiers are used to specify the format of a gutter. | |
| 132 The values of the variables `default-gutter', `top-gutter', | |
| 133 `left-gutter', `right-gutter', and `bottom-gutter' are always | |
| 134 gutter specifiers. | |
| 135 | |
| 136 Valid gutter instantiators are called \"gutter descriptors\" and are | |
| 137 either strings or property-lists of strings. See `default-gutter' for | |
| 138 a description of the exact format." | |
| 139 (make-specifier-and-init 'gutter spec-list)) | |
| 140 | |
| 141 (defun make-gutter-size-specifier (spec-list) | |
| 142 "Return a new `gutter-size' specifier object with the given spec list. | |
| 143 SPEC-LIST can be a list of specifications (each of which is a cons of a | |
| 144 locale and a list of instantiators), a single instantiator, or a list | |
| 145 of instantiators. See `make-specifier' for more information about | |
| 146 specifiers. | |
| 147 | |
| 148 Gutter-size specifiers are used to specify the size of a gutter. The | |
| 149 values of the variables `default-gutter-size', `top-gutter-size', | |
| 150 `left-gutter-size', `right-gutter-size', and `bottom-gutter-size' are | |
| 151 always gutter-size specifiers. | |
| 152 | |
| 153 Valid gutter-size instantiators are either integers or the special | |
| 154 symbol 'autodetect. If a gutter-size is set to 'autodetect them the | |
| 155 size of the gutter will be adjusted to just accommodate the gutters | |
| 156 contents. 'autodetect only works for top and bottom gutters." | |
| 157 (make-specifier-and-init 'gutter-size spec-list)) | |
| 158 | |
| 159 (defun make-gutter-visible-specifier (spec-list) | |
| 160 "Return a new `gutter-visible' specifier object with the given spec list. | |
| 161 SPEC-LIST can be a list of specifications (each of which is a cons of a | |
| 162 locale and a list of instantiators), a single instantiator, or a list | |
| 163 of instantiators. See `make-specifier' for more information about | |
| 164 specifiers. | |
| 165 | |
| 166 Gutter-visible specifiers are used to specify the visibility of a | |
| 167 gutter. The values of the variables `default-gutter-visible-p', | |
| 168 `top-gutter-visible-p', `left-gutter-visible-p', | |
| 169 `right-gutter-visible-p', and `bottom-gutter-visible-p' are always | |
| 170 gutter-visible specifiers. | |
| 171 | |
| 172 Valid gutter-visible instantiators are t, nil or a list of symbols. | |
| 173 If a gutter-visible instantiator is set to a list of symbols, and the | |
| 174 corresponding gutter specification is a property-list strings, then | |
| 175 elements of the gutter specification will only be visible if the | |
| 176 corresponding symbol occurs in the gutter-visible instantiator." | |
| 177 (make-specifier-and-init 'gutter-visible spec-list)) | |
| 178 | |
| 179 ;;; gutter.el ends here. | |
| 180 | |
| 181 |