mirror of
https://github.com/flynx/ImageGrid.git
synced 2025-11-04 13:20:10 +00:00
200 lines
6.4 KiB
JavaScript
Executable File
200 lines
6.4 KiB
JavaScript
Executable File
/**********************************************************************
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*
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*
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*
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**********************************************************************/
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((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
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(function(require){ var module={} // make module AMD/node compatible...
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/*********************************************************************/
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var actions = require('lib/actions')
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var features = require('lib/features')
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var core = require('features/core')
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/*********************************************************************/
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// NOTE: this is split out to an action so as to enable ui elements to
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// adapt to ribbon size changes...
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//
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// XXX try using .ribbons.resizeRibbon(..) for basic tasks...
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// XXX try a strategy: load more in the direction of movement by an offset...
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// XXX updateRibbon(..) is not signature compatible with data.updateRibbon(..)
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var PartialRibbonsActions = actions.Actions({
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config: {
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// Number of screen widths to load...
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'ribbon-size-screens': 7,
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// Number of screen widths to edge to trigger reload...
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'ribbon-resize-threshold': 1.5,
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// Timeout before a non-forced ribbon size update happens after
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// the action...
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// NOTE: if set to null, the update will be sync...
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'ribbon-update-timeout': 120,
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},
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// NOTE: this will force sync resize if one of the following is true:
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// - the target is not loaded
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// - we are less than screen width from the edge
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// - threshold is set to 0
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// XXX this is not signature compatible with data.updateRibbon(..)
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// XXX do not do anything for off-screen ribbons...
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updateRibbon: ['- Interface/Update partial ribbon size',
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function(target, w, size, threshold){
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target = target instanceof jQuery
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? this.ribbons.getElemGID(target)
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// NOTE: data.getImage(..) can return null at start or end
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// of ribbon, thus we need to account for this...
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: (this.data.getImage(target)
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|| this.data.getImage(target, 'after'))
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w = w || this.screenwidth
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// get config data and normalize...
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size = (size
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|| this.config['ribbon-size-screens']
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|| 5) * w
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threshold = threshold == 0 ? threshold
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: (threshold
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|| this.config['ribbon-resize-threshold']
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|| 1) * w
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var timeout = this.config['ribbon-update-timeout']
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// next/prev loaded...
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var img = this.ribbons.getImage(target)
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var nl = img.nextAll('.image:not(.clone)').length
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var pl = img.prevAll('.image:not(.clone)').length
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// next/prev available...
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// NOTE: we subtract 1 to remove the current and make these
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// compatible with: nl, pl
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var na = this.data.getImages(target, size, 'after').length - 1
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var pa = this.data.getImages(target, size, 'before').length - 1
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// do the update...
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// no threshold means force load...
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if(threshold == 0
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// the target is not loaded...
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|| img.length == 0
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// passed hard threshold on the right...
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|| (nl < w && na > nl)
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// passed hard threshold on the left...
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|| (pl < w && pa > pl)){
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this.resizeRibbon(target, size)
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// do a late resize...
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// loaded more than we need (crop?)...
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} else if(na + pa < nl + pl
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// passed threshold on the right...
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|| (nl < threshold && na > nl)
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// passed threshold on the left...
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|| (pl < threshold && pa > pl)
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// loaded more than we need by threshold...
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|| nl + pl + 1 > size + threshold){
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return function(){
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// sync update...
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if(timeout == null){
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this.resizeRibbon(target, size)
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// async update...
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} else {
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// XXX need to check if we are too close to the edge...
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var that = this
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//setTimeout(function(){ that.resizeRibbon(target, size) }, 0)
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if(this.__update_timeout){
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clearTimeout(this.__update_timeout)
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}
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this.__update_timeout = setTimeout(function(){
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delete that.__update_timeout
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that.resizeRibbon(target, size)
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}, timeout)
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}
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}
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}
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}],
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})
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// NOTE: I do not fully understand it yet, but PartialRibbons must be
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// setup BEFORE RibbonAlignToFirst, otherwise the later will break
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// on shifting an image to a new ribbon...
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// To reproduce:
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// - setupe RibbonAlignToFirst first
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// - go to top ribbon
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// - shift image up
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// XXX The two should be completely independent.... (???)
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var PartialRibbons =
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module.PartialRibbons = core.ImageGridFeatures.Feature({
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title: 'Partial Ribbons',
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doc: core.doc`Maintains partially loaded ribbons, this enables very large
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image sets to be handled efficiently.`,
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// NOTE: partial ribbons needs to be setup first...
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// ...the reasons why things break otherwise is not too clear.
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priority: 'high',
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tag: 'ui-partial-ribbons',
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exclusive: ['ui-partial-ribbons'],
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depends: [
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'ui'
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],
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suggested: [
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'ui-partial-ribbons-precache',
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],
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actions: PartialRibbonsActions,
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handlers: [
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['focusImage.pre centerImage.pre',
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function(target, list){
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// NOTE: we have to do this as we are called BEFORE the
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// actual focus change happens...
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// XXX is there a better way to do this???
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target = list != null ? target = this.data.getImage(target, list) : target
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this.updateRibbon(target)
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}],
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['resizing.pre',
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function(unit, size){
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// keep constant size in single image...
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if(this.toggleSingleImage && this.toggleSingleImage('?') == 'on'){
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this.updateRibbon(
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'current',
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this.config['ribbons-resize-single-image'] || 13)
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} else if(unit == 'scale'){
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this.updateRibbon('current', this.screenwidth / size || 1)
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} else if(unit == 'screenwidth'){
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this.updateRibbon('current', size || 1)
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} else if(unit == 'screenheight'){
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size = size || 1
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// convert target height in ribbons to width in images...
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// NOTE: this does not account for compensation that
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// .updateRibbon(..) makes for fitting whole image
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// counts, this is a small enough error so as not
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// to waste time on...
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var s = this.ribbons.scale()
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var h = this.ribbons.getScreenHeightRibbons()
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var w = this.ribbons.getScreenWidthImages()
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var nw = w / (h/size)
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this.updateRibbon('current', nw)
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}
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}],
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],
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})
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/**********************************************************************
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* vim:set ts=4 sw=4 : */ return module })
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