mirror of
https://github.com/flynx/ImageGrid.git
synced 2025-10-29 18:30:09 +00:00
337 lines
8.2 KiB
JavaScript
Executable File
337 lines
8.2 KiB
JavaScript
Executable File
/**********************************************************************
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*
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*
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*
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**********************************************************************/
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define(function(require){ var module = {}
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//var DEBUG = DEBUG != null ? DEBUG : true
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var actions = require('lib/actions')
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var features = require('lib/features')
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var preview = require('lib/preview')
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var core = require('features/core')
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try{
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var sharp = requirejs('sharp')
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} catch(err){
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var sharp = null
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}
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if(typeof(process) != 'undefined'){
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var cp = requirejs('child_process')
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var fse = requirejs('fs-extra')
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var pathlib = requirejs('path')
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var glob = requirejs('glob')
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var file = require('imagegrid/file')
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}
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/*********************************************************************/
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if(typeof(process) != 'undefined'){
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var ensureDir = file.denodeify(fse.ensureDir)
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}
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function normalizeOrientation(orientation){
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return {
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orientation: ({
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0: 0,
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1: 0,
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2: 0,
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3: 180,
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4: 0,
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5: 90,
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6: 90,
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7: 90,
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8: 270,
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})[orientation],
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flipped: ({
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0: null,
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1: null,
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2: ['horizontal'],
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3: null,
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4: ['vertical'],
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5: ['vertical'],
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6: null,
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7: ['horizontal'],
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8: null,
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})[orientation],
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}
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}
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/*********************************************************************/
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var SharpActions = actions.Actions({
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config: {
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'preview-normalized': true,
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// NOTE: this uses 'preview-sizes' and 'preview-path-template'
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// from filesystem.IndexFormat...
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},
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// NOTE: post handlers are pushed in .makePreviews(..)
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// XXX might be a good idea to make this a bit more generic...
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// XXX might be a good idea to use tasks to throttle....
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startPreviewWorker: ['- Sharp/',
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function(){
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var that = this
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if(this.previewConstructorWorker){
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return
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}
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this.previewConstructorWorker = cp.fork(
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'./workers/preview-constructor.js', {
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cwd: process.cwd(),
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})
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.on('message', function(res){
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if(res.err){
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// XXX
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console.error(res)
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} else {
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var ticket = res.ticket
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// clear listener...
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if(res.status == 'completed'){
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that.previewConstructorWorker.__post_handlers[res.ticket](null, 'completed')
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delete that.previewConstructorWorker.__post_handlers[res.ticket]
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} else {
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that.previewConstructorWorker.__post_handlers[res.ticket](res.err, res.data)
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}
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}
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})
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this.previewConstructorWorker.__post_handlers = {}
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}],
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stopPreviewWorker: ['- Sharp/',
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function(){
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this.previewConstructorWorker && this.previewConstructorWorker.kill()
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delete this.previewConstructorWorker
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}],
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// .makePreviews()
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// .makePreviews('current')
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// -> actions
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//
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// .makePreviews(gid)
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// -> actions
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//
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// .makePreviews([gid, gid, ..])
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// -> actions
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//
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// .makePreviews('all')
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// -> actions
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//
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// XXX should this account for non-jpeg images???
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makePreviews: ['Sharp/Make image previews',
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function(images, sizes, base_path, logger){
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var that = this
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logger = logger || this.logger
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// get/normalize images...
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images = images || this.current
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// keywords...
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images = images == 'all' ? this.data.getImages('all')
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: images == 'current' ? this.current
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: images
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images = images instanceof Array ? images : [images]
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// NOTE: if base_path is not provided this will base the
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// previews in .base_path for each image, usually this
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// is where the index resides but might not be the
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// case for compound indexes...
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var data = {}
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images.forEach(function(gid){
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var img = that.images[gid]
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var base = base_path || img.base_path || that.location.path
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var d = data[base] = data[base] || []
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d.push({
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source: that.getImagePath(gid),
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gid: gid,
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})
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})
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// get/normalize sizes....
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var cfg_sizes = this.config['preview-sizes'].slice() || []
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cfg_sizes
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.sort()
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.reverse()
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if(sizes){
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sizes = sizes instanceof Array ? sizes : [sizes]
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// normalize to preview size...
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sizes = (this.config['preview-normalized'] ?
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sizes
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.map(function(s){
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return cfg_sizes.filter(function(c){ return c >= s }).pop() || s })
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: sizes)
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.unique()
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} else {
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sizes = cfg_sizes
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}
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var path_tpl = that.config['preview-path-template']
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.replace(/\$INDEX|\$\{INDEX\}/g, that.config['index-dir'] || '.ImageGrid')
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var post_handler = function(err, data){
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if(data.status == 'done' || data.status == 'skipped'){
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// get/make preview list...
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var img = that.images[data.gid]
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var preview = img.preview =
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img.preview || {}
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// save previews...
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preview[data.res + 'px'] = data.path
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var o = normalizeOrientation(data.orientation)
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// save orientation...
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img.orientation = o.orientation
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img.flipped = o.flipped
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that.markChanged(data.gid)
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}
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logger && logger.emit(data.status, data.path)
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}
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// now do the work (async)...
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if(this.previewConstructorWorker){
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return Promise.all(Object.keys(data).map(function(base_path){
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return new Promise(function(resolve, reject){
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var ticket = Date.now()
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while(ticket in that.previewConstructorWorker.__post_handlers){
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ticket = Date.now()
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}
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that.previewConstructorWorker.send({
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ticket: ticket,
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images: data[base_path],
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sizes: sizes,
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base_path: base_path,
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target_tpl: path_tpl,
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})
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that.previewConstructorWorker.__post_handlers[ticket] = function(err, data){
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// XXX
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if(err){
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reject(err)
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}
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if(data == 'completed'){
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resolve()
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} else {
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post_handler(err, data)
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}
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}
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})
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}))
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// now do the work (sync)...
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} else {
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return Promise.all(Object.keys(data).map(function(base_path){
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return preview.makePreviews(
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data[base_path], sizes, base_path, path_tpl, post_handler)
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}))
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}
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}],
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})
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// XXX need to auto-generate previews for very large images...
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var Sharp =
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module.Sharp = core.ImageGridFeatures.Feature({
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title: '',
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doc: '',
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tag: 'sharp',
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depends: [
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'location',
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'index-format',
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],
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actions: SharpActions,
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isApplicable: function(){ return !!sharp },
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handlers: [
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// set orientation if not defined...
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['updateImage',
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function(_, gid){
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var that = this
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var img = this.images[gid]
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if(img && img.orientation == null){
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img.orientation = 0
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sharp(this.getImagePath(gid))
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.metadata()
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.then(function(data){
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var o = normalizeOrientation(data.orientation)
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// NOTE: we need to set orientation to something
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// or we'll check it again and again...
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img.orientation = o.orientation || 0
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img.flipped = o.flipped
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that.markChanged(gid)
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// update image to use the orientation...
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// XXX this might be a source for recursion
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// as it triggers .updateImage(..) again...
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that.ribbons && that.ribbons.updateImage(gid)
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})
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}
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}],
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// XXX need to:
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// - if image too large to set the preview to "loading..."
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// - create previews...
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// - update image...
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/*
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['updateImage.pre',
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function(gid){
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var that = this
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if(this.images[gid].preview == null){
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sharp(this.getImagePath(gid))
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.metadata()
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.then(function(metadata){
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// current image is larger than any of the previews...
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if(Math.max(metadata.width, metadata.height)
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> Math.max.apply(Math, that.config['preview-sizes'])){
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// create the currently needed preview first...
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that.makePreviews(gid, that.ribbons.getVisibleImageSize())
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.then(function(){
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// load the created preview...
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that.ribbons.updateImage(gid)
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// create the rest...
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that.makePreviews(gid)
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})
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}
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})
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}
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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 : */
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return module })
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