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split out the history machinery into urlhistory.js...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2013-11-25 07:55:30 +04:00
parent 8003ceda29
commit 21f47bfbd1
3 changed files with 121 additions and 86 deletions
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86
ui/data.js
View File

@ -123,8 +123,6 @@ var SETTINGS = {
}
var BASE_URL = '.'
var BASE_URL_HISTORY = []
var BASE_URL_LIMIT = 10
var IMAGE_CACHE = []
@ -1621,90 +1619,6 @@ function preCacheAllRibbons(){
/**********************************************************************
* URL history...
*/
function setupBaseURLHistory(){
$('.viewer')
.on('baseURLChanged', function(evt, old_url, new_url){
var updated = false
// store the old and new urls in history unless they already
// exist...
if(BASE_URL_HISTORY.indexOf(old_url) < 0){
BASE_URL_HISTORY.splice(0, 0, old_url)
updated = true
}
if(BASE_URL_HISTORY.indexOf(new_url) < 0){
BASE_URL_HISTORY.splice(0, 0, new_url)
updated = true
}
// truncate the history if needed...
if(BASE_URL_HISTORY.length > BASE_URL_LIMIT){
BASE_URL_HISTORY.splice(BASE_URL_LIMIT, BASE_URL_HISTORY.length)
updated = true
}
// XXX is this the right place for this???
if(updated){
saveLocalStorageBaseURLHistory()
}
})
}
// Push a url to top of history...
//
// NOTE: this does not care if a url exists or not, all other instances
// will get removed...
function pushURLHistory(url){
url = url == null ? BASE_URL : url
while(BASE_URL_HISTORY.indexOf(url) >= 0){
BASE_URL_HISTORY.splice(BASE_URL_HISTORY.indexOf(url), 1)
}
BASE_URL_HISTORY.splice(0, 0, url)
// XXX is this the right place for this???
saveLocalStorageBaseURLHistory()
return url
}
function getURLHistoryPosition(){
return BASE_URL_HISTORY.indexOf(BASE_URL)
}
function getURLHistoryNext(){
var res = BASE_URL_HISTORY[ getURLHistoryPosition() - 1]
return res == null ? BASE_URL : res
}
function getURLHistoryPrev(){
var res = BASE_URL_HISTORY[ getURLHistoryPosition() + 1 ]
return res == null ? BASE_URL : res
}
// NOTE: this will not affect history url order...
function makeURLHistoryLoader(get, end_msg){
return function(){
var url = get()
if(url != BASE_URL){
statusNotify(loadDir(url))
} else {
showStatusQ('History: '+ end_msg +'...')
}
return url
}
}
var loadURLHistoryNext = makeURLHistoryLoader(getURLHistoryNext, 'at last URL')
var loadURLHistoryPrev = makeURLHistoryLoader(getURLHistoryPrev, 'at first URL')
/**********************************************************************
* Actions...
*/

1
ui/index.html
View File

@ -23,6 +23,7 @@
<script src="ribbons.js"></script>
<script src="data.js"></script>
<script src="urlhistory.js"></script>
<script src="crop.js"></script>
<script src="sort.js"></script>
<script src="workers.js"></script>

120
ui/urlhistory.js Executable file
View File

@ -0,0 +1,120 @@
/**********************************************************************
*
*
*
**********************************************************************/
//var DEBUG = DEBUG != null ? DEBUG : true
/*********************************************************************/
var BASE_URL_HISTORY = []
var BASE_URL_LIMIT = 10
/**********************************************************************
* URL history...
*/
// Setup history event handlers...
//
// NOTE: this will save history state to localStorage...
function setupBaseURLHistory(){
$('.viewer')
.on('baseURLChanged', function(evt, old_url, new_url){
var updated = false
// store the old and new urls in history unless they already
// exist...
if(BASE_URL_HISTORY.indexOf(old_url) < 0){
BASE_URL_HISTORY.splice(0, 0, old_url)
updated = true
}
if(BASE_URL_HISTORY.indexOf(new_url) < 0){
BASE_URL_HISTORY.splice(0, 0, new_url)
updated = true
}
// truncate the history if needed...
if(BASE_URL_HISTORY.length > BASE_URL_LIMIT){
BASE_URL_HISTORY.splice(BASE_URL_LIMIT, BASE_URL_HISTORY.length)
updated = true
}
// XXX is this the right place for this???
if(updated){
saveLocalStorageBaseURLHistory()
}
})
}
// Push a url to top of history...
//
// NOTE: this does not care if a url exists or not, all other instances
// will get removed...
// NOTE: this will not do any loading...
// NOTE: this will save history state to localStorage...
function pushURLHistory(url){
url = url == null ? BASE_URL : url
while(BASE_URL_HISTORY.indexOf(url) >= 0){
BASE_URL_HISTORY.splice(BASE_URL_HISTORY.indexOf(url), 1)
}
BASE_URL_HISTORY.splice(0, 0, url)
// XXX is this the right place for this???
saveLocalStorageBaseURLHistory()
return url
}
// Get current position in history...
//
function getURLHistoryPosition(){
return BASE_URL_HISTORY.indexOf(BASE_URL)
}
// Get next/prev relative position in history...
//
function getURLHistoryNext(){
var res = BASE_URL_HISTORY[ getURLHistoryPosition() - 1]
return res == null ? BASE_URL : res
}
function getURLHistoryPrev(){
var res = BASE_URL_HISTORY[ getURLHistoryPosition() + 1 ]
return res == null ? BASE_URL : res
}
/**********************************************************************
* Actions...
*/
// Make a history load action...
//
// NOTE: this will not affect history url order...
function makeURLHistoryLoader(get, end_msg){
return function(){
var url = get()
if(url != BASE_URL){
statusNotify(loadDir(url))
} else {
showStatusQ('History: '+ end_msg +'...')
}
return url
}
}
var loadURLHistoryNext = makeURLHistoryLoader(getURLHistoryNext, 'at last URL')
var loadURLHistoryPrev = makeURLHistoryLoader(getURLHistoryPrev, 'at first URL')
/**********************************************************************
* vim:set ts=4 sw=4 : */