147 lines
3.6 KiB
JavaScript
147 lines
3.6 KiB
JavaScript
(function( $ ) {
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$.fn.muImageResize = function( params ) {
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var _defaultSettings = {
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width:300,
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height:300,
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wrap_fix:true // Let image display like in-line.
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};
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var _set = $.extend(_defaultSettings, params);
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var isIE7 = $.browser.msie && (7 == ~~ $.browser.version);
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//var anyDynamicSource = $(this).attr("src");
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//$(this).attr("src",anyDynamicSource+ "?" + new Date().getTime());
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// Just bind load event once per element.
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return this.one('load', function() {
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// Remove all attributes and CSS rules.
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this.removeAttribute( "width" );
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this.removeAttribute( "height" );
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this.style.width = this.style.height = "";
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var ow, oh;
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//[workaround] - msie need get width early
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if ($.browser.msie)
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{
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// Get original size for calcutation.
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ow = this.width;
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oh = this.height;
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}
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if (_set.wrap_fix) {
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$(this).wrap(function(){
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return '<div style="width:'+_set.width+'px; height:'+_set.height+'px; display:inline-block;" />';
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});
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}
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if (!$.browser.msie)
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{
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// Get original size for calcutation.
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ow = this.width;
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oh = this.height;
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}
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// if cannot get width or height.
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if (0==ow || 0==oh){
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$(this).width(_set.width);
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$(this).height(_set.height);
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}else{
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// Merge position settings
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var sh_margin_type='';
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// if original image's width > height.
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if (ow > oh) {
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p = oh / _set.height;
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oh = _set.height;
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ow = ow / p;
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// original image width smaller than settings.
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if (ow < _set.width){
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// need to resize again,
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// because new image size range must can cover settings' range, than we can crop it correctly.
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p = ow / _set.width;
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ow = _set.width;
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oh = oh / p;
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// the crop range would be in the center of new image size.
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sh = (oh-_set.height)/2;
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t=sh+'px';
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r=_set.width+'px';
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b=(_set.height+sh)+'px';
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l='0px';
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// need to be adjust top position latter.
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sh_margin_type = 'margin-top';
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// original image width bigger than settings.
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}else{
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// new image range can cover settings' range.
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sh = (ow-_set.width)/2;
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t='0px';
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r=(_set.width+sh)+'px';
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b=_set.height+'px';
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l=sh+'px';
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// need to be adjust left position latter.
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sh_margin_type = 'margin-left';
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}
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// ref above, change width to height then do same things.
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}else{
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p = ow / _set.width;
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ow = _set.width;
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oh = oh / p;
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if (oh < _set.height) {
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p = oh / _set.height;
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oh = _set.height;
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ow = ow / p;
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sh = (ow-_set.width)/2;
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t='0px';
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r=(_set.width+sh)+'px';
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b=_set.height+'px';
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l=sh+'px';
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sh_margin_type = 'margin-left';
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}else{
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sh = (oh-_set.height)/2;
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t=sh+'px';
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r=_set.width+'px';
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b=(_set.height+sh)+'px';
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l='0px';
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sh_margin_type = 'margin-top';
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}
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}
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// Resize img.
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$(this).width(ow);
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$(this).height(oh);
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// Crop img by set clip style.
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$(this).css('clip','rect('+t+' '+r+' '+b+' '+l+')');
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var osh = 0;
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if('auto' != $(this).css(sh_margin_type)){
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osh = parseInt($(this).css(sh_margin_type));
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}
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if (0 < sh) {sh*=-1;}
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sh += osh;
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$(this).css(sh_margin_type, sh+'px');
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$(this).css('position','absolute');
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}
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$(this).fadeIn('slow');
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})
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.one( "error", function() {
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//$(this).hide();
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})
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.each(function() {
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$(this).hide();
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// Trigger load event (for Gecko and MSIE)
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if ( this.complete || $.browser.msie ) {
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$( this ).trigger( "load" ).trigger( "error" );
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}
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});
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};
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})( jQuery ); |