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477 lines
15 KiB
JavaScript
477 lines
15 KiB
JavaScript
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/**
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* @name CeL function for drag-and-drop
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* @fileoverview
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* 本檔案包含了 web 物件的滑鼠拖曳 functions。
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* @since
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*/
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/*
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http://www.w3.org/TR/html5/dnd.html#dnd
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http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html
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https://developer.mozilla.org/en/Using_files_from_web_applications
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http://html5demos.com/drag
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http://d.hatena.ne.jp/ksy_dev/20100731/p1?sid=810f738005e991c6
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*/
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'use strict';
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if (typeof CeL === 'function')
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CeL.run(
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{
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name:'interact.DnD',
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require : 'interact.DOM.is_HTML_element|interact.DOM.get_element|interact.DOM.add_listener|interact.DOM.stop_event|interact.DOM.set_text|data.swap_key_value',
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code : function(library_namespace) {
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// requiring
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var is_HTML_element = this.r('is_HTML_element'), get_element = this.r('get_element'), add_listener = this.r('add_listener'), stop_event = this.r('stop_event'), set_text = this.r('set_text'), swap_key_value = this.r('swap_key_value');
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/**
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* null module constructor
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* @class web drag_and_drop 的 functions
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*/
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var _// JSDT:_module_
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= function() {
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// null module constructor
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};
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/**
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* for JSDT: 有 prototype 才會將之當作 Class
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*/
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_// JSDT:_module_
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.prototype = {
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};
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_// JSDT:_module_
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.
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move_element = function(element, target) {
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target.appendChild(element.parentNode.removeChild(element));
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};
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function set_drop_target(element, drop_handler, drag_in_handler) {
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if (!is_HTML_element(element)
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&& !is_HTML_element(element = get_element(element)))
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return;
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//if(element.id) library_namespace.debug(element.id, 0, 'set_drop_target');
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add_listener( {
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// 拖進 target。
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// 阻止 dragover 預定動作方能觸發 ondrop。
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// http://fillano.blog.ithome.com.tw/post/257/81723
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dragover : stop_event,
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// 在 target 上拖動。
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dragenter : stop_event,
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// 在 target 上拖完放開滑鼠。
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drop : function(event) {
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// 處理 types: 將所有設定的 type 一一列出。IE9 沒有 dataTransfer.types。
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var i = 0, list = event.dataTransfer.types || ['text', 'url'], l = list.length, data, type;
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for (; i < l; i++) {
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try {
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// IE10 中拖拉外部檔案時，dataTransfer.getData(list[i]) 可能會 throw "Invalid argument."
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data = event.dataTransfer.getData(list[i]);
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type = typeof data;
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library_namespace.debug('[' + (i + 1) + '/' + l + '] [' + list[i] + ']: '
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+ (data ? type === 'string' && /^[a-z\d\-]+:\/\//i.test(data) ?
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'<a href="' + data + '" target="_blank">' + decodeURI(data) + '</a>'
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: data
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: '[' + type + '] ' + (String(data) || '<span class="gray">(null)</span>')),
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1, 'set_drop_target.ondrop');
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if (list[i] in set_drop_target.handler) {
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type = set_drop_target.handler[list[i]];
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for ( var h = 0, _t = this,
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timeout_binder = (typeof setTimeout === 'function' || typeof setTimeout === 'object') &&
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function() {
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library_namespace.debug('準備執行。 (' + data + ')', 2, 'set_drop_target.ondrop');
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//library_namespace.debug('' + type[h]);
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type[this].call(_t, data);
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library_namespace.debug('執行完畢。', 2, 'set_drop_target.ondrop');
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}; h < type.length; h++) {
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try {
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if(timeout_binder) {
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library_namespace.debug('use setTimeout to run:<br />'
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+ type[h].toString().replace(/\n/g, '<br />'), 2,
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'set_drop_target.ondrop');
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setTimeout(timeout_binder.bind(h), 0);
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} else {
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library_namespace.debug('directly run. typeof setTimeout: [' + typeof setTimeout + '].', 2, 'set_drop_target.ondrop');
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type[h].call(this, data);
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}
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} catch (e) {
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library_namespace.warn('set_drop_target.ondrop: Error to run ' + list[i] + '.' + h);
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library_namespace.error(e);
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}
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}
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}
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} catch (e) {
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library_namespace.debug('Error to get data of [' + list[i] + ']: ' + e,
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1, 'set_drop_target.ondrop');
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//library_namespace.error(e);
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}
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}
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// 處理 files. IE9 沒有 dataTransfer.files。
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// http://www.html5rocks.com/en/tutorials/file/dndfiles/
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// https://github.com/MrSwitch/dropfile
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if((list = event.dataTransfer.files)
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&& (l = list.length)){
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library_namespace.debug('Drop ' + l + ' file object(s).', 1, 'set_drop_target.ondrop');
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for (i = 0; i < l; i++) {
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data = list[i];
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library_namespace.debug('[' + (i + 1) + '/' + l + '] <em>'
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+ data.name + '</em>' + (data.type ? ' (' + data.type + ')' : '') + ': ' + data.size + ' bytes.',
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1, 'set_drop_target.ondrop');
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// 若是小圖，則直接顯示出來。
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if (/^image\/\w+/.test(data.type) && data.size < 1000000) {
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_.read_file(data, function(event) {
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var contents = event.target.result;
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library_namespace.debug('<em>' + this.file.name + '</em>: <img title="' + this.file.name + '" src="'
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+ contents + '" />' + contents.length
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+ ' chars starting with [' + contents.slice(0, 30).replace(/</g, '<') + ']',
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1, 'set_drop_target.ondrop');
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}, 'url');
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}
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}
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_.read_files(list, function(event){
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var contents = event.target.result;
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library_namespace.debug('[' + this.file.name + '] loaded: ' + contents.length
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+ ' chars starting with [' + contents.slice(0, 30).replace(/</g, '<')
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+ ']', 1, 'set_drop_target');
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});
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}
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return stop_event(event);
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}
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}, element);
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if (library_namespace.is_Object(drop_handler)) {
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library_namespace.debug('adding drop handler.');
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set_drop_target.add_handler(drop_handler);
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}
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return element;
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}
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set_drop_target.handler = Object.create(null);
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/**
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* 為 drop 的 type 設定 handler.
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*
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* @param {Object}handler_hash
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* 欲設定的 handler.<br />
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* e.g., {type_name : handler },<br />
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* e.g., { type_name : { id : handler } }
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*/
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set_drop_target.add_handler = function add_handler(handler_hash) {
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if (!library_namespace.is_Object(handler_hash)) {
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return;
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}
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var type_name, handler_list, handler, id;
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for (type_name in handler_hash) {
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library_namespace.debug('adding [' + type_name + '].');
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handler_list = set_drop_target.handler[type_name];
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if (!Array.isArray(handler_list))
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set_drop_target.handler[type_name] = handler_list = [];
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handler = handler_hash[type_name];
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library_namespace.debug('adding [' + type_name + '] ' + handler, 1, 'set_drop_target.add_handler');
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if (library_namespace.is_Function(handler)) {
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handler_list.push(handler);
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} else if (library_namespace.is_Object(handler)) {
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for (id in handler)
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handler_list[id] = handler[id];
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} else {
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library_namespace.warn('unknown handler: ' + handler);
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}
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}
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};
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_// JSDT:_module_
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.
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set_drop_target = set_drop_target;
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// <a href="http://www.w3.org/TR/FileAPI/" accessdate="2011/11/5 15:33">File API</a>
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_// JSDT:_module_
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.
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read_files = function(files, handler, index) {
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// check files type
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if (!library_namespace.is_type(files, 'FileList')) {
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if(handler && typeof handler.error === 'function')
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//handler.error.call(null);
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handler.error();
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return;
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}
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if(isNaN(index)){
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// 初始化 initialization
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handler = _.read_file.regular_handler(handler);
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index = 0;
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}
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// 依序讀入個別檔案內容。
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_.read_file(files[index], [ handler, {
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loadend : function() {
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if (++index < files.length)
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_.read_files(files, handler, index);
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}
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} ]);
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};
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// <a href="http://www.w3.org/TR/FileAPI/" accessdate="2011/11/5 15:33">File API</a>
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function read_file(file, handler, encoding, start, end) {
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var blob, reader = library_namespace.is_WWW(true)
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//
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&& window.FileReader && new window.FileReader();
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if (!reader) {
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library_namespace.error('read_file: This browser / platform does not support FileReader.');
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return;
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}
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// check file type
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if (!library_namespace.is_type(file, 'File')) {
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if(handler && typeof handler.error === 'function')
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//handler.error.call(null);
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handler.error();
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return;
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}
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// 非標準! 但這樣設定後，event handler 中即可使用 this.file 取得相關資訊。
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reader.file = file;
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add_listener( [ _.read_file.regular_handler(handler), {
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error : function(event) {
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var error = event.target.error, code = error.code, message;
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switch (code) {
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case error.NOT_FOUND_ERR:
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message = 'File [' + file.name + '] Not Found!';
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break;
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case error.NOT_READABLE_ERR:
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message = 'File [' + file.name + '] is not readable!';
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break;
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case error.ABORT_ERR:
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message = 'User aborted reading [' + file.name + '].';
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break;
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case error.SECURITY_ERR:
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// 多是因不能 DnD local files.
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message = 'Security error to read [' + file.name + '].';
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break;
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default:
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error = _.read_file.code_to_name || (_.read_file.code_to_name = swap_key_value(error, [], /^[A-Z_\-\d]+$/));
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if (code in error)
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message = '<em>' + error[code] + '</em> to read [' + file.name + '].';
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}
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library_namespace.warn('read_file: ' + (message || 'Error ' + code + ' to read [' + file.name + '].'));
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},
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loadend : function() {
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// 預防 memory leak.
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delete reader.file;
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//library_namespace.debug('reader.file deleted.', 2, 'read_file');
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}
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} ], reader);
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if (start || end) {
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if (isNaN(start = parseInt(start))
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|| start < 0)
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start = 0;
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if (!isNaN(end = parseInt(end))
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&& end > start && end < file.size)
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blob = file.slice ? file.slice(start, end)
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: file.webkitSlice ? file.webkitSlice(start, end)
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: file.mozSlice && file.mozSlice(start, end);
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}
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if(!blob)
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blob = file;
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library_namespace.debug('read-in [' + file.name + ']' + (encoding ? ' as ' + encoding : '') + '.', 0, 'read_file');
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if ((!encoding || encoding === 'binary')
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// IE10 沒有 .readAsBinaryString
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&& reader.readAsBinaryString)
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reader.readAsBinaryString(blob);
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else if(encoding === 'url')
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reader.readAsDataURL(blob);
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else
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// UTF-8 is assumed if this parameter is not specified.
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// https://developer.mozilla.org/en/DOM/FileReader
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reader.readAsText(blob, encoding || 'UTF-8');
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};
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read_file.regular_handler = function(handler) {
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if (typeof handler === 'function')
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handler = {
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load : handler
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};
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if (library_namespace.is_Object(handler)) {
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if (typeof handler.status === 'string')
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handler.status = get_element(handler.status);
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if (is_HTML_element(handler.status)) {
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// progress bar
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var progress_bar = handler.status;
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if(!handler.progress)
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handler.progress = function(event) {
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if (event.lengthComputable) {
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// 讀取比例
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//var percent_loaded;
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set_text(progress_bar, '[' + this.file.name + '] ' +
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(progress_bar.style.width = Math.round(event.loaded / event.total * 100) + '%'));
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}
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};
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if(!handler.load)
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handler.load = function(event) {
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set_text(progress_bar, '[' + this.file.name + '] loaded.');
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};
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delete handler.status;
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}
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}
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return handler;
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};
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_// JSDT:_module_
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.
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read_file = read_file;
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// about drag-and-drop @ IE6 ---------------------------
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/*
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2008/1/24 0:51:17
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*/
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//CSS of body
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get_drag_path.bCSS = 'margin:0;padding:.2em;color:#e42;background-color:#eff;';
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// default contents in HTML
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get_drag_path.dC = '<em>Drop Here</em> （不能拖曳多個物件）';
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// show infomation after every drag
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get_drag_path.show = 1;
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// drag object
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get_drag_path.o = 'dropT';
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// 每次執行完是否應顯示
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get_drag_path.shouldShow = function(o) {
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return o == showM.so;
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};
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// href Object & Array
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get_drag_path.href_hash = Object.create(null);
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get_drag_path.href_list = [];
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// 未設定目錄。拖曳功能只在 IE6 有效。
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get_drag_path.able = function() {
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var n = window ? window.navigator : 0;
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try {
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return n && (n = n.appVersion) && (n = n.match(/MSIE (\d+)/))
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&& n[1] == 6;
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} catch (e) {
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// 呼叫 navigator.* 可能有 -2147024882 "存放裝置空間不足，無法完成此操作。"
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// http://www.dotblogs.com.tw/alonstar/archive/2008/10/09/5625.aspx
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// 結果原來是我的機碼不知道為什麼多了一大堆.NET CLR 3.0的版本，找了一台正常的比對之後，把多的機碼刪除就好了。
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// HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent\Post Platform
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return !!get_drag_path.href_list;
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}
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};
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get_drag_path.add = function(p) {
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// sl('get_drag_path: add path ['+p+']');
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// 不能計算數目：不準 可能會有 file:///, http:// 等
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get_drag_path.href_hash[this.href = p] = 1;
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};
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// 每 get_drag_path.interval 執行一次
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function get_drag_path() {
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var _s = arguments.callee,
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// 或者直接用 dropT.location.href，不透過 document.getElementById.
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o = document.getElementById(_s.o), w = o.contentWindow, bU = 'about:blank', i, t = [];
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if (w.location.href != _s.href || w.location.href != bU) {
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// 處理中隱藏，預防此時再被拖進。
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o.style.display = 'none';
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if (w.location.href != bU) {
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// sl('get_drag_path: get href ['+w.location.href+']');
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i = unescape(getPathOnly(w.location.href));
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// sl('get_drag_path: get unescaped href ['+i+']');
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// NOT GOOD: if(!i.indexOf('file:///'))i=getFP(getPathOnly(i));
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// drag 的都是完整 path。getPathOnly 應該先於 unescape，預防 # 等字元。
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if (/^[a-z]:\//i.test(i))
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i = getFP(i.replace(/\//g, '\\'));
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_s.add(i);
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w.location.href = bU;
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if (_s.show)
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_s.d(), _s.afterAdd && _s.afterAdd();
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}
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if (bU == w.location.href)
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// 用 try: 有時 about:blank 還沒設定好
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try {
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// 無法用 className
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var s = w.document.body;
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s.style.cssText = _s.bCSS;
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// 只能在 about:blank 設定
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s.innerHTML = _s.dC;
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var s = _s.shouldShow;
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o.style.display = (typeof s === 'function' ? s(_s.o) : s) ? 'block'
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: 'none';
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} catch (e) {
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}
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}
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return _s.href;
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}
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// delete url in collection
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get_drag_path.d = function(u) {
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if (u === 1) {
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get_drag_path.href_hash = Object.create(null);
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return;
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} else if (u in get_drag_path.href_hash)
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delete get_drag_path.href_hash[u];
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get_drag_path.href_list = [];
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var t = [];
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for (i in get_drag_path.href_hash){
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get_drag_path.href_list.push(i);
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t.push('<div><b style="cursor:pointer;color:#e22;" onclick="get_drag_path.d(this.parentNode.childNodes[2].innerHTML);">[delete]</b> <span>'
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+ i + '</span></div>');
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}
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// get_drag_path.href_list.sort();
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sl('last dragged: '
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+ this.href
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+ (t.length > 1 ? '<hr />[' + t.length + '] get_drag_path.href_list:<br />'
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+ t.join('') : ''));
|
||
return get_drag_path.href_list;
|
||
};
|
||
|
||
//get_drag_path.afterAdd = function() {};
|
||
|
||
|
||
|
||
|
||
|
||
|
||
return (
|
||
_// JSDT:_module_
|
||
);
|
||
}
|
||
|
||
|
||
});
|
||
|