mirror of
https://github.com/Gnucash/gnucash.git
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83d14e1c1c
It is split into - /libgnucash (for the non-gui bits) - /gnucash (for the gui) - /common (misc source files used by both) - /bindings (currently only holds python bindings) This is the first step in restructuring the code. It will need much more fine tuning later on.
75 lines
3.4 KiB
Scheme
75 lines
3.4 KiB
Scheme
;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2 of
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;; the License, or (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; if not, contact:
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;;
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;; Free Software Foundation Voice: +1-617-542-5942
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;; 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652
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;; Boston, MA 02110-1301, USA gnu@gnu.org
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;;; config-var: You can create them, set values, find out if the value
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;;; is different from the default, and you can get a description. You
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;;; can also specify an action function which will be called whenever
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;;; the value is changed. The action function receives the special
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;;; var and the new value as arguments and should return either #f if
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;;; the modification should be rejected, or a list containing the
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;;; result otherwise.
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;;; Finally, a config var has two states, "officially" modified, and
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;;; unofficially modified. You control what kind of modification
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;;; you're making with the second argument to
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;;; gnc:config-var-value-set! The idea is that options specified on
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;;; the command line will set the value of these config vars, but that
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;;; setting is considered transient. Other settings (like from the UI
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;;; preferences panel, or normal user code) should be considered
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;;; permanent, and if they leave the variable value different from the
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;;; default, should be saved to the auto configuration file.
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(define (gnc:make-config-var description
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set-action-func
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equality-func
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default)
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(let ((var (vector description set-action-func
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equality-func #f default default)))
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(gnc:config-var-value-set! var #f default)
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var))
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(define (gnc:config-var-description-get var) (vector-ref var 0))
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(define (gnc:config-var-action-func-get var) (vector-ref var 1))
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(define (gnc:config-var-equality-func-get var) (vector-ref var 2))
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(define (gnc:config-var-modified? var) (vector-ref var 3))
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(define (gnc:config-var-modified?-set! var value) (vector-set! var 3 value))
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(define (gnc:config-var-default-value-get var) (vector-ref var 4))
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(define (gnc:config-var-default-value-set! var value)
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(vector-set! var 4 value))
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(define (gnc:config-var-value-get var) (vector-ref var 5))
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(define (gnc:config-var-value-set! var is-config-mod? value)
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(let ((set-action (gnc:config-var-action-func-get var))
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(result (list value)))
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(if set-action (set! result (set-action var value)))
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(if result
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(begin
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(if is-config-mod? (gnc:config-var-modified?-set! var #t))
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(vector-set! var 5 (car result))))))
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(define (gnc:config-var-value-is-default? var)
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(if (not (gnc:config-var-modified? var))
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#t
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(let ((equal-values? (gnc:config-var-equality-func-get var)))
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(equal-values?
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(gnc:config-var-default-value-get var)
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(gnc:config-var-value-get var)))))
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