Difference between revisions of "Widget:ImageLoader"
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== Using this widget == | == Using this widget == | ||
| − | + | To insert this widget, use the following code: | |
| + | |||
| + | <nowiki>{{#widget:</nowiki>{{PAGENAME}}<nowiki> | ||
| + | |url=https://upload.wikimedia.org/wikipedia/commons/b/b8/Trojan_Room_coffee_pot_xcoffee.png | ||
| + | |width=300 | ||
| + | |height=250 | ||
| + | |interval=60 | ||
| + | }}</nowiki> | ||
| + | |||
| + | This will give the following result:<br/> | ||
| + | {{#widget:{{PAGENAME}} | ||
| + | |url=https://upload.wikimedia.org/wikipedia/commons/b/b8/Trojan_Room_coffee_pot_xcoffee.png | ||
| + | |width=156 | ||
| + | |height=175 | ||
| + | }}<br/> | ||
| + | Note that '''url''' is mandatory, the rest is optional (leave out interval to make the image static) | ||
| + | |||
== Copy to your site == | == Copy to your site == | ||
To use this widget on your site, just install [http://www.mediawiki.org/wiki/Extension:Widgets MediaWiki Widgets extension] and copy [{{fullurl:{{FULLPAGENAME}}|action=edit}} full source code] of this page to your wiki as '''{{FULLPAGENAME}}''' article. | To use this widget on your site, just install [http://www.mediawiki.org/wiki/Extension:Widgets MediaWiki Widgets extension] and copy [{{fullurl:{{FULLPAGENAME}}|action=edit}} full source code] of this page to your wiki as '''{{FULLPAGENAME}}''' article. | ||
</noinclude><includeonly><script type="text/javascript"> | </noinclude><includeonly><script type="text/javascript"> | ||
| − | console. | + | (function( ) |
| + | { | ||
| + | "use strict"; | ||
| + | var imageObj = { "src" : "<!--{$url|validate:url}-->", "id" : null, "imgBuf" : null, "loading" : false }; | ||
| + | |||
| + | function setFilter( _img, _filter ) | ||
| + | { | ||
| + | var s = _img.style; | ||
| + | if ( "webkitFilter" in s ) s.webkitFilter = _filter; | ||
| + | if ( "mozFilter" in s ) s.mozFilter = _filter; | ||
| + | if ( "msFilter" in s ) s.msFilter = _filter; | ||
| + | if ( "oFilter" in s ) s.oFilter = _filter; | ||
| + | if ( "filter" in s ) s.filter = _filter; | ||
| + | } | ||
| + | |||
| + | function imgSuccess() | ||
| + | { | ||
| + | // Transfer image and clear filters | ||
| + | this.img.src = this.imgBuf.src; | ||
| + | setFilter( this.img, "" ); | ||
| + | this.loading = false; | ||
| + | } | ||
| + | |||
| + | function imgFail() | ||
| + | { | ||
| + | // Try and make 'old' image sepia on error | ||
| + | setFilter( this.img, "grayscale(100%) sepia(100%)" ); | ||
| + | this.loading = false; | ||
| + | if ( !this.link ) | ||
| + | { | ||
| + | this.link = this.img.parentNode.insertBefore( document.createElement( "a" ), this.img ); | ||
| + | this.link.target = "_blank"; | ||
| + | this.link.href = this.src; | ||
| + | this.link.textContent = "Open image"; | ||
| + | } | ||
| + | } | ||
| + | |||
| + | function updateImage( ) | ||
| + | { | ||
| + | if ( !this.img ) | ||
| + | this.img = document.getElementById( "imgLoad" + this.id ); | ||
| + | |||
| + | if ( !this.img ) | ||
| + | { | ||
| + | console.error( "can't find target image" ); | ||
| + | return; | ||
| + | } | ||
| + | |||
| + | if ( !this.imgBuf ) | ||
| + | { | ||
| + | this.imgBuf = new Image(); | ||
| + | this.imgBuf.onerror = imgFail.bind( this ); | ||
| + | this.imgBuf.onload = imgSuccess.bind( this ); | ||
| + | this.img.onerror = null; | ||
| + | this.img.onload = null; | ||
| + | } | ||
| + | |||
| + | // If the image is still loading, mark the current one 'old' and wait on the next interval | ||
| + | if ( this.loading ) | ||
| + | { | ||
| + | setFilter( this.img, "grayscale(100%) sepia(100%)" ); | ||
| + | } else { | ||
| + | this.loading = true; | ||
| + | this.imgBuf.src = this.src + "?" + ( Math.random() * 100000 | 0 ); | ||
| + | } | ||
| + | } | ||
| + | |||
| + | // Use interval timer id as image id | ||
| + | var interval = 1000 * <!--{$interval|validate:int|default:0}-->; | ||
| + | if ( interval > 0 ) | ||
| + | imageObj.id = setInterval( updateImage.bind( imageObj ), interval ); | ||
| + | document.write( '<img width="<!--{$width|escape:html|default:auto}-->" height="<!--{$height|escape:html|default:auto}-->" src="' + imageObj.src + "?" + ( Math.random() * 100000 | 0 ) + '" id="imgLoad' + imageObj.id + '"/>' ); | ||
| + | imageObj.img = document.getElementById( "imgLoad" + imageObj.id ); | ||
| + | imageObj.img.onerror = imgFail.bind( imageObj); | ||
| + | }( )); | ||
</script> | </script> | ||
</includeonly> | </includeonly> | ||
Latest revision as of 13:10, 17 October 2016
This widget allows you to embed images from non-https sources on your wiki page.
Created by Xopr
Using this widget
To insert this widget, use the following code:
{{#widget:ImageLoader
|url=https://upload.wikimedia.org/wikipedia/commons/b/b8/Trojan_Room_coffee_pot_xcoffee.png
|width=300
|height=250
|interval=60
}}
This will give the following result:
Note that url is mandatory, the rest is optional (leave out interval to make the image static)
Copy to your site
To use this widget on your site, just install MediaWiki Widgets extension and copy full source code of this page to your wiki as Widget:ImageLoader article.
