67 lines
1.9 KiB
JavaScript
67 lines
1.9 KiB
JavaScript
/**
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* @fileOverview FilePaste
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*/
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define([
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'../../base',
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'./runtime',
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'../../lib/file'
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], function( Base, Html5Runtime, File ) {
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return Html5Runtime.register( 'FilePaste', {
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init: function() {
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var opts = this.options,
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elem = this.elem = opts.container,
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accept = '.*',
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arr, i, len, item;
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// accetp的mimeTypes中生成匹配正则。
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if ( opts.accept ) {
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arr = [];
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for ( i = 0, len = opts.accept.length; i < len; i++ ) {
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item = opts.accept[ i ].mimeTypes;
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item && arr.push( item );
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}
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if ( arr.length ) {
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accept = arr.join(',');
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accept = accept.replace( /,/g, '|' ).replace( /\*/g, '.*' );
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}
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}
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this.accept = accept = new RegExp( accept, 'i' );
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this.hander = Base.bindFn( this._pasteHander, this );
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elem.on( 'paste', this.hander );
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},
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_pasteHander: function( e ) {
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var allowed = [],
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ruid = this.getRuid(),
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items, item, blob, i, len;
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e = e.originalEvent || e;
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items = e.clipboardData.items;
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for ( i = 0, len = items.length; i < len; i++ ) {
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item = items[ i ];
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if ( item.kind !== 'file' || !(blob = item.getAsFile()) ) {
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continue;
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}
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allowed.push( new File( ruid, blob ) );
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}
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if ( allowed.length ) {
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// 不阻止非文件粘贴（文字粘贴）的事件冒泡
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e.preventDefault();
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e.stopPropagation();
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this.trigger( 'paste', allowed );
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}
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},
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destroy: function() {
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this.elem.off( 'paste', this.hander );
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}
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});
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});
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