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re-frame
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Merge branch 'develop' of https://github.com/Day8/re-frame into develop

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mike-thompson-day8 2015-03-06 18:10:27 +11:00
parent 9bb1b4e459 3a7f022321
commit ce6a04f68a
1 changed files with 28 additions and 19 deletions
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45
src/re_frame/undo.cljs
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@ -27,7 +27,7 @@
;; Seems really ugly to have mirrored vectors, but ...
;; the code kinda falls out when you do. I'm feeling lazy.
(def ^:private app-explain (reagent/atom "")) ;; mirrors app-db
(def ^:private undo-explain-list (reagent/atom [])) ;; mirrors undo-liat
(def ^:private undo-explain-list (reagent/atom [])) ;; mirrors undo-list
(def ^:private redo-explain-list (reagent/atom [])) ;; mirrors redo-list
@ -78,23 +78,23 @@
(subs/register
:undo-explantions
:undo-explanations
(fn handler
; "returns a vector of string explnations
; "return a vector of string explanations ordered oldest to most recent"
[_ _]
(reaction (deref undo-explain-list))))
(reaction (conj @undo-explain-list @app-explain))))
(subs/register
:redo-explantions
:redo-explanations
(fn handler
; "returns a vector of string explnations
; "returns a vector of string explanations ordered from most recent undo onward"
[_ _]
(reaction (deref redo-explain-list))))
;; -- event handlers ----------------------------------------------------------------------------
(defn undo
(defn- undo
[undos cur redos]
(let [u @undos
r (cons @cur @redos)]
@ -102,16 +102,21 @@
(reset! redos r)
(reset! undos (pop u))))
(defn- undo-count
"undo until we reach count or run out of undos"
[count]
(when (and (pos? count) (undos?))
(undo undo-list app-db redo-list)
(undo undo-explain-list app-explain redo-explain-list)
(recur (dec count))))
(handlers/register-base ;; not a pure handler
:undo ;; usage: (dispatch [:undo])
:undo ;; usage: (dispatch [:undo n])
(fn handler
[_ _]
[_ event-v]
(if-not (undos?)
(warn "re-frame: you did a (dispatch [:undo]), but there is nothing to undo.")
(do
(undo undo-list app-db redo-list)
(undo undo-explain-list app-explain redo-explain-list)))))
(undo-count (if (second event-v) (second event-v) 1)))))
(defn- redo
@ -122,15 +127,19 @@
(reset! redos (rest r))
(reset! undos u)))
(defn- redo-count
"redo until we reach count or run out of redos"
[count]
(when (and (pos? count) (redos?))
(redo undo-list app-db redo-list)
(redo undo-explain-list app-explain redo-explain-list)
(recur (dec count))))
(handlers/register-base ;; not a pure handler
:redo ;; usage: (dispatch [:redo])
:redo ;; usage: (dispatch [:redo n])
(fn handler
[_ _]
[_ event-v]
(if-not (redos?)
(warn "re-frame: you did a (dispatch [:redo]), but there is nothing to redo.")
(do
(redo undo-list app-db redo-list)
(redo undo-explain-list app-explain redo-explain-list)))))
(redo-count (if (second event-v) (second event-v) 1)))))