mirror of
https://github.com/flynx/ImageGrid.git
synced 2025-11-04 05:10:07 +00:00
86 lines
2.3 KiB
JavaScript
Executable File
86 lines
2.3 KiB
JavaScript
Executable File
/**********************************************************************
|
|
*
|
|
*
|
|
*
|
|
**********************************************************************/
|
|
|
|
//var DEBUG = DEBUG != null ? DEBUG : true
|
|
//
|
|
var IMAGE_CACHE = []
|
|
|
|
|
|
|
|
/*********************************************************************/
|
|
|
|
// TODO add global cache...
|
|
// - manage cache by number and preview size...
|
|
// - keep in biggish...
|
|
|
|
|
|
// NOTE: this will always overwrite the previous cache set for a ribbon...
|
|
// NOTE: it appears that sorting images by priority before loading them
|
|
// to cache has little or no effect on the order they are
|
|
// loaded/rendered...
|
|
// NOTE: this is not meant to be a real cache, rather a que for the OS and
|
|
// backend/webkit on what's next...
|
|
//
|
|
// XXX this appears to actually make things slow and laggy...
|
|
function preCacheRibbonImages(ribbon){
|
|
var deferred = $.Deferred()
|
|
setTimeout(function(){
|
|
var i = getRibbonIndex(ribbon)
|
|
var size = getVisibleImageSize('max')
|
|
var screen_size = getScreenWidthInImages(getVisibleImageSize())
|
|
// XXX needs tuning...
|
|
var cache_frame_size = (screen_size * CONFIG.load_screens)
|
|
var images = ribbon.find('.image')
|
|
var first = getImageGID(images.first())
|
|
var last = getImageGID(images.last())
|
|
|
|
var gids = getGIDsAfter(-cache_frame_size, first, i)
|
|
.concat(getGIDsAfter(cache_frame_size, last, i))
|
|
|
|
var cache = []
|
|
IMAGE_CACHE[i] = cache
|
|
$.each(gids, function(i, e){
|
|
var img = new Image()
|
|
img.src = getBestPreview(e, size).url
|
|
cache.push(img)
|
|
})
|
|
|
|
deferred.resolve(cache)
|
|
}, 0)
|
|
return deferred
|
|
}
|
|
|
|
|
|
function preCacheAllRibbons(){
|
|
$('.ribbon').each(function(){
|
|
preCacheRibbonImages($(this))
|
|
})
|
|
return IMAGE_CACHE
|
|
}
|
|
|
|
|
|
|
|
/*********************************************************************/
|
|
|
|
function setupImageCache(viewer){
|
|
console.log('Image cache: setup...')
|
|
|
|
return viewer
|
|
.on('reloadedRibbon updatedRibbon', function(evt, ribbon){
|
|
|
|
window.DEBUG
|
|
&& console.log('>>> (ribbon:', getRibbonIndex(ribbon), ') Updating cache...')
|
|
|
|
preCacheRibbonImages(ribbon)
|
|
})
|
|
}
|
|
SETUP_BINDINGS.push(setupImageCache)
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* vim:set ts=4 sw=4 : */
|