mirror of
https://github.com/moodle/moodle.git
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MDL-31321 Drag and drop upload - can now cope with multiple filemanager/filepickers on a page
This commit is contained in:
Davo Smith
parent
baa5cd8240
commit
6d9121d3a8
@ -22,380 +22,386 @@
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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M.form_dndupload = {
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// YUI object.
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Y: null,
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// URL for upload requests
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url: M.cfg.wwwroot + '/repository/repository_ajax.php?action=upload',
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// itemid used for repository upload
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itemid: null,
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// accepted filetypes accepted by this form passed to repository
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acceptedtypes: [],
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// maximum number of files this form allows
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maxfiles: 0,
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// maximum size of files allowed in this form
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maxbytes: 0,
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// unqiue id of this form field used for html elements
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clientid: '',
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// upload repository id, used for upload
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repositoryid: 0,
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// container which holds the node which recieves drag events
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container: null,
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// filemanager element we are working with
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filemanager: null,
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// callback to filepicker element to refesh when uploaded
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callback: null,
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// Nasty hack to distinguish between dragenter(first entry),
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// dragenter+dragleave(moving between child elements) and dragleave (leaving element)
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entercount: 0,
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M.form_dndupload = {}
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M.form_dndupload.init = function(Y, options) {
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var dnduploadhelper = {
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// YUI object.
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Y: null,
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// URL for upload requests
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url: M.cfg.wwwroot + '/repository/repository_ajax.php?action=upload',
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// itemid used for repository upload
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itemid: null,
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// accepted filetypes accepted by this form passed to repository
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acceptedtypes: [],
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// maximum number of files this form allows
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maxfiles: 0,
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// maximum size of files allowed in this form
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maxbytes: 0,
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// unqiue id of this form field used for html elements
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clientid: '',
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// upload repository id, used for upload
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repositoryid: 0,
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// container which holds the node which recieves drag events
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container: null,
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// filemanager element we are working with
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filemanager: null,
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// callback to filepicker element to refesh when uploaded
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callback: null,
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// Nasty hack to distinguish between dragenter(first entry),
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// dragenter+dragleave(moving between child elements) and dragleave (leaving element)
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entercount: 0,
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/**
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* Initalise the drag and drop upload interface
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* Note: one and only one of options.filemanager and options.formcallback must be defined
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*
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* @param Y the YUI object
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* @param object options {
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* itemid: itemid used for repository upload in this form
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* acceptdtypes: accepted filetypes by this form
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* maxfiles: maximum number of files this form allows
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* maxbytes: maximum size of files allowed in this form
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* clientid: unqiue id of this form field used for html elements
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* containerprefix: prefix of htmlid of container
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* repositories: array of repository objects passed from filepicker
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* filemanager: filemanager element we are working with
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* callback: callback to filepicker element to refesh when uploaded
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* }
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*/
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init: function(Y, options) {
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this.Y = Y;
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/**
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* Initalise the drag and drop upload interface
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* Note: one and only one of options.filemanager and options.formcallback must be defined
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*
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* @param Y the YUI object
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* @param object options {
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* itemid: itemid used for repository upload in this form
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* acceptdtypes: accepted filetypes by this form
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* maxfiles: maximum number of files this form allows
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* maxbytes: maximum size of files allowed in this form
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* clientid: unqiue id of this form field used for html elements
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* containerprefix: prefix of htmlid of container
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* repositories: array of repository objects passed from filepicker
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* filemanager: filemanager element we are working with
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* callback: callback to filepicker element to refesh when uploaded
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* }
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*/
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init: function(Y, options) {
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this.Y = Y;
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if (!this.browser_supported()) {
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return; // Browser does not support the required functionality
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}
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// try and retrieve enabled upload repository
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this.repositoryid = this.get_upload_repositoryid(options.repositories);
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if (!this.repositoryid) {
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return; // no upload repository is enabled to upload to
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}
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this.acceptedtypes = options.acceptedtypes;
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this.clientid = options.clientid;
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this.maxfiles = options.maxfiles;
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this.maxbytes = options.maxbytes;
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this.itemid = options.itemid;
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this.container = this.Y.one(options.containerprefix + this.clientid);
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if (options.filemanager) {
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// Needed to tell the filemanager to redraw when files uploaded
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// and to check how many files are already uploaded
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this.filemanager = options.filemanager;
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} else if (options.formcallback) {
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// Needed to tell the filepicker to update when a new
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// file is uploaded
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this.callback = options.formcallback;
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} else {
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if (M.cfg.developerdebug) {
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alert('dndupload: Need to define either options.filemanager or options.callback');
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if (!this.browser_supported()) {
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return; // Browser does not support the required functionality
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}
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return;
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}
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this.init_events();
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this.Y.one('#dndenabled-'+this.clientid).setStyle('display', 'inline');
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},
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// try and retrieve enabled upload repository
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this.repositoryid = this.get_upload_repositoryid(options.repositories);
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/**
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* Check the browser has the required functionality
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* @return true if browser supports drag/drop upload
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*/
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browser_supported: function() {
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if (!this.repositoryid) {
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return; // no upload repository is enabled to upload to
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}
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if (typeof FileReader == 'undefined') {
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return false;
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}
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if (typeof FormData == 'undefined') {
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return false;
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}
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return true;
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},
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this.acceptedtypes = options.acceptedtypes;
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this.clientid = options.clientid;
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this.maxfiles = options.maxfiles;
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this.maxbytes = options.maxbytes;
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this.itemid = options.itemid;
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this.container = this.Y.one(options.containerprefix + this.clientid);
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/**
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* Get upload repoistory from array of enabled repositories
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*
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* @param array repositories repository objects passed from filepicker
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* @param returns int id of upload repository or false if not found
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*/
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get_upload_repositoryid: function(repositories) {
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for (var i in repositories) {
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if (repositories[i].type == "upload") {
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return repositories[i].id;
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}
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}
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if (options.filemanager) {
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// Needed to tell the filemanager to redraw when files uploaded
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// and to check how many files are already uploaded
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this.filemanager = options.filemanager;
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} else if (options.formcallback) {
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return false;
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},
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/**
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* Initialise drag events on node container, all events need
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* to be processed for drag and drop to work
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*/
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init_events: function() {
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this.Y.on('dragenter', this.drag_enter, this.container, this);
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this.Y.on('dragleave', this.drag_leave, this.container, this);
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this.Y.on('dragover', this.drag_over, this.container, this);
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this.Y.on('drop', this.drop, this.container, this);
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},
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/**
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* Check if the drag contents are valid and then call
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* preventdefault / stoppropagation to let the browser know
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* we will handle this drag/drop
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*
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* @param e event object
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* @return boolean true if a valid file drag event
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*/
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check_drag: function(e) {
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if (!this.has_files(e)) {
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return false;
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}
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e.preventDefault();
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e.stopPropagation();
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if (this.reached_maxfiles()) {
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return false;
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}
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return true;
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},
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/**
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* Handle a dragenter event, highlight the destination node
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* when a suitable drag event occurs
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*/
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drag_enter: function(e) {
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if (!this.check_drag(e)) {
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return true;
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}
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this.entercount++;
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if (this.entercount >= 2) {
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this.entercount = 2; // Just moved over a child element - nothing to do
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return false;
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}
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this.show_upload_ready();
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return false;
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},
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/**
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* Handle a dragleave event, Remove the highlight if dragged from
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* node
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*/
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drag_leave: function(e) {
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if (!this.check_drag(e)) {
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return true;
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}
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this.entercount--;
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if (this.entercount == 1) {
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return false; // Just moved over a child element - nothing to do
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}
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this.entercount = 0;
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this.hide_upload_ready();
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return false;
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},
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/**
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* Handle a dragover event. Required to intercept to prevent the browser from
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* handling the drag and drop event as normal
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*/
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drag_over: function(e) {
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if (!this.check_drag(e)) {
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return true;
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}
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return false;
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},
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/**
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* Handle a drop event. Remove the highlight and then upload each
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* of the files (until we reach the file limit, or run out of files)
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*/
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drop: function(e) {
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if (!this.check_drag(e)) {
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return true;
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}
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this.entercount = 0;
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this.hide_upload_ready();
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this.show_progress_spinner();
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var files = e._event.dataTransfer.files;
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if (this.filemanager) {
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var currentfilecount = this.filemanager.filecount;
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for (var i=0, f; f=files[i]; i++) {
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if (currentfilecount >= this.maxfiles && this.maxfiles != -1) {
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break;
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// Needed to tell the filepicker to update when a new
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// file is uploaded
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this.callback = options.formcallback;
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} else {
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if (M.cfg.developerdebug) {
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alert('dndupload: Need to define either options.filemanager or options.callback');
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}
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if (this.upload_file(f)) {
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currentfilecount++;
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return;
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}
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this.init_events();
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this.Y.one('#dndenabled-'+this.clientid).setStyle('display', 'inline');
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},
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/**
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* Check the browser has the required functionality
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* @return true if browser supports drag/drop upload
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*/
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browser_supported: function() {
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if (typeof FileReader == 'undefined') {
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return false;
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}
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if (typeof FormData == 'undefined') {
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return false;
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}
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return true;
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},
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/**
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* Get upload repoistory from array of enabled repositories
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*
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* @param array repositories repository objects passed from filepicker
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* @param returns int id of upload repository or false if not found
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*/
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get_upload_repositoryid: function(repositories) {
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for (var i in repositories) {
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if (repositories[i].type == "upload") {
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return repositories[i].id;
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}
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}
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} else {
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if (files.length >= 1) {
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this.upload_file(files[0]);
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}
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}
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return false;
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},
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/**
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* Check to see if the drag event has any files in it
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*
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* @param e event object
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* @return boolean true if event has files
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*/
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has_files: function(e) {
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var types = e._event.dataTransfer.types;
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for (var i=0; i<types.length; i++) {
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if (types[i] == 'Files') {
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return true;
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}
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}
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return false;
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},
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/**
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* Check if reached the maximumum number of allowed files
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*
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* @return boolean true if reached maximum number of files
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*/
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reached_maxfiles: function() {
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if (this.filemanager) {
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if (this.filemanager.filecount >= this.maxfiles && this.maxfiles != -1) {
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return true;
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}
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}
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return false;
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},
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/**
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* Highlight the destination node
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*/
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show_upload_ready: function() {
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this.container.addClass('dndupload-over');
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},
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/**
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* Remove highlight on destination node
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*/
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hide_upload_ready: function() {
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this.container.removeClass('dndupload-over');
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},
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/**
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* Display a progress spinner in the destination node
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*/
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show_progress_spinner: function() {
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// add a loading spinner to show something is happening
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var loadingspinner = this.Y.Node.create('<div id="dndprogresspinner-'+this.clientid+'" style="text-align: center">');
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loadingspinner.append('<img src="'+M.util.image_url('i/loading_small')+'" />');
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this.container.append(loadingspinner);
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},
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/**
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* Remove progress spinner in the destination node
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*/
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hide_progress_spinner: function() {
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this.Y.one('#dndprogresspinner-'+this.clientid).remove();
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},
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/**
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* Tell the attached filemanager element (if any) to refresh on file
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* upload
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*/
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update_filemanager: function() {
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if (this.filemanager) {
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// update the filemanager that we've uploaded the files
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this.filemanager.filepicker_callback();
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}
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},
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/**
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* Upload a single file via an AJAX call to the 'upload' repository
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*/
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upload_file: function(file) {
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if (file.size > this.maxbytes && this.maxbytes > 0) {
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// Check filesize before attempting to upload
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this.hide_progress_spinner();
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alert(M.util.get_string('uploadformlimit', 'moodle')+"\n'"+file.name+"'");
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return false;
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}
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},
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// This would be an ideal place to use the Y.io function
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// however, this does not support data encoded using the
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// FormData object, which is needed to transfer data from
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// the DataTransfer object into an XMLHTTPRequest
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// This can be converted when the YUI issue has been integrated:
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// http://yuilibrary.com/projects/yui3/ticket/2531274
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var xhr = new XMLHttpRequest();
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var self = this;
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xhr.onreadystatechange = function() { // Process the server response
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if (xhr.readyState == 4) {
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self.hide_progress_spinner();
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if (xhr.status == 200) {
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var result = JSON.parse(xhr.responseText);
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if (result) {
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if (result.error) {
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alert(result.error);
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} else if (self.callback) {
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// Only update the filepicker if there were no errors
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if (result.event == 'fileexists') {
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// Do not worry about this, as we only care about the last
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// file uploaded, with the filepicker
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result.file = result.newfile.filename;
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result.url = result.newfile.url;
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}
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result.client_id = self.clientid;
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self.callback(result);
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} else {
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self.update_filemanager();
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}
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/**
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* Initialise drag events on node container, all events need
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* to be processed for drag and drop to work
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*/
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init_events: function() {
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this.Y.on('dragenter', this.drag_enter, this.container, this);
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this.Y.on('dragleave', this.drag_leave, this.container, this);
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this.Y.on('dragover', this.drag_over, this.container, this);
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this.Y.on('drop', this.drop, this.container, this);
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},
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/**
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* Check if the drag contents are valid and then call
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* preventdefault / stoppropagation to let the browser know
|
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* we will handle this drag/drop
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*
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* @param e event object
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* @return boolean true if a valid file drag event
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*/
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check_drag: function(e) {
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if (!this.has_files(e)) {
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return false;
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}
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e.preventDefault();
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e.stopPropagation();
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if (this.reached_maxfiles()) {
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return false;
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}
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return true;
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},
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/**
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* Handle a dragenter event, highlight the destination node
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* when a suitable drag event occurs
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*/
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drag_enter: function(e) {
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if (!this.check_drag(e)) {
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return true;
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}
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this.entercount++;
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if (this.entercount >= 2) {
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this.entercount = 2; // Just moved over a child element - nothing to do
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return false;
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}
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this.show_upload_ready();
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return false;
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},
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/**
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* Handle a dragleave event, Remove the highlight if dragged from
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* node
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*/
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drag_leave: function(e) {
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if (!this.check_drag(e)) {
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return true;
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}
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this.entercount--;
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||||
if (this.entercount == 1) {
|
||||
return false; // Just moved over a child element - nothing to do
|
||||
}
|
||||
|
||||
this.entercount = 0;
|
||||
this.hide_upload_ready();
|
||||
return false;
|
||||
},
|
||||
|
||||
/**
|
||||
* Handle a dragover event. Required to intercept to prevent the browser from
|
||||
* handling the drag and drop event as normal
|
||||
*/
|
||||
drag_over: function(e) {
|
||||
if (!this.check_drag(e)) {
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
},
|
||||
|
||||
/**
|
||||
* Handle a drop event. Remove the highlight and then upload each
|
||||
* of the files (until we reach the file limit, or run out of files)
|
||||
*/
|
||||
drop: function(e) {
|
||||
if (!this.check_drag(e)) {
|
||||
return true;
|
||||
}
|
||||
|
||||
this.entercount = 0;
|
||||
this.hide_upload_ready();
|
||||
this.show_progress_spinner();
|
||||
|
||||
var files = e._event.dataTransfer.files;
|
||||
if (this.filemanager) {
|
||||
var currentfilecount = this.filemanager.filecount;
|
||||
for (var i=0, f; f=files[i]; i++) {
|
||||
if (currentfilecount >= this.maxfiles && this.maxfiles != -1) {
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
alert(M.util.get_string('serverconnection', 'error'));
|
||||
if (this.upload_file(f)) {
|
||||
currentfilecount++;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
if (files.length >= 1) {
|
||||
this.upload_file(files[0]);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
// Prepare the data to send
|
||||
var formdata = new FormData();
|
||||
formdata.append('repo_upload_file', file); // The FormData class allows us to attach a file
|
||||
formdata.append('sesskey', M.cfg.sesskey);
|
||||
formdata.append('repo_id', this.repositoryid);
|
||||
formdata.append('itemid', this.itemid);
|
||||
if (this.filemanager) { // Filepickers do not have folders
|
||||
formdata.append('savepath', this.filemanager.currentpath);
|
||||
}
|
||||
return false;
|
||||
},
|
||||
|
||||
if (this.acceptedtypes.constructor == Array) {
|
||||
for (var i=0; i<this.acceptedtypes.length; i++) {
|
||||
formdata.append('accepted_types[]', this.acceptedtypes[i]);
|
||||
/**
|
||||
* Check to see if the drag event has any files in it
|
||||
*
|
||||
* @param e event object
|
||||
* @return boolean true if event has files
|
||||
*/
|
||||
has_files: function(e) {
|
||||
var types = e._event.dataTransfer.types;
|
||||
for (var i=0; i<types.length; i++) {
|
||||
if (types[i] == 'Files') {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
formdata.append('accepted_types[]', this.acceptedtypes);
|
||||
}
|
||||
return false;
|
||||
},
|
||||
|
||||
// Send the file & required details
|
||||
xhr.open("POST", this.url, true);
|
||||
xhr.send(formdata);
|
||||
return true;
|
||||
}
|
||||
/**
|
||||
* Check if reached the maximumum number of allowed files
|
||||
*
|
||||
* @return boolean true if reached maximum number of files
|
||||
*/
|
||||
reached_maxfiles: function() {
|
||||
if (this.filemanager) {
|
||||
if (this.filemanager.filecount >= this.maxfiles && this.maxfiles != -1) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
},
|
||||
|
||||
/**
|
||||
* Highlight the destination node
|
||||
*/
|
||||
show_upload_ready: function() {
|
||||
this.container.addClass('dndupload-over');
|
||||
},
|
||||
|
||||
/**
|
||||
* Remove highlight on destination node
|
||||
*/
|
||||
hide_upload_ready: function() {
|
||||
this.container.removeClass('dndupload-over');
|
||||
},
|
||||
|
||||
/**
|
||||
* Display a progress spinner in the destination node
|
||||
*/
|
||||
show_progress_spinner: function() {
|
||||
// add a loading spinner to show something is happening
|
||||
var loadingspinner = this.Y.Node.create('<div id="dndprogresspinner-'+this.clientid+'" style="text-align: center">');
|
||||
loadingspinner.append('<img src="'+M.util.image_url('i/loading_small')+'" />');
|
||||
this.container.append(loadingspinner);
|
||||
},
|
||||
|
||||
/**
|
||||
* Remove progress spinner in the destination node
|
||||
*/
|
||||
hide_progress_spinner: function() {
|
||||
this.Y.one('#dndprogresspinner-'+this.clientid).remove();
|
||||
},
|
||||
|
||||
/**
|
||||
* Tell the attached filemanager element (if any) to refresh on file
|
||||
* upload
|
||||
*/
|
||||
update_filemanager: function() {
|
||||
if (this.filemanager) {
|
||||
// update the filemanager that we've uploaded the files
|
||||
this.filemanager.filepicker_callback();
|
||||
}
|
||||
},
|
||||
|
||||
/**
|
||||
* Upload a single file via an AJAX call to the 'upload' repository
|
||||
*/
|
||||
upload_file: function(file) {
|
||||
if (file.size > this.maxbytes && this.maxbytes > 0) {
|
||||
// Check filesize before attempting to upload
|
||||
this.hide_progress_spinner();
|
||||
alert(M.util.get_string('uploadformlimit', 'moodle')+"\n'"+file.name+"'");
|
||||
return false;
|
||||
}
|
||||
|
||||
// This would be an ideal place to use the Y.io function
|
||||
// however, this does not support data encoded using the
|
||||
// FormData object, which is needed to transfer data from
|
||||
// the DataTransfer object into an XMLHTTPRequest
|
||||
// This can be converted when the YUI issue has been integrated:
|
||||
// http://yuilibrary.com/projects/yui3/ticket/2531274
|
||||
var xhr = new XMLHttpRequest();
|
||||
var self = this;
|
||||
xhr.onreadystatechange = function() { // Process the server response
|
||||
if (xhr.readyState == 4) {
|
||||
self.hide_progress_spinner();
|
||||
if (xhr.status == 200) {
|
||||
var result = JSON.parse(xhr.responseText);
|
||||
if (result) {
|
||||
if (result.error) {
|
||||
alert(result.error);
|
||||
} else if (self.callback) {
|
||||
// Only update the filepicker if there were no errors
|
||||
if (result.event == 'fileexists') {
|
||||
// Do not worry about this, as we only care about the last
|
||||
// file uploaded, with the filepicker
|
||||
result.file = result.newfile.filename;
|
||||
result.url = result.newfile.url;
|
||||
}
|
||||
result.client_id = self.clientid;
|
||||
self.callback(result);
|
||||
} else {
|
||||
self.update_filemanager();
|
||||
}
|
||||
}
|
||||
} else {
|
||||
alert(M.util.get_string('serverconnection', 'error'));
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
// Prepare the data to send
|
||||
var formdata = new FormData();
|
||||
formdata.append('repo_upload_file', file); // The FormData class allows us to attach a file
|
||||
formdata.append('sesskey', M.cfg.sesskey);
|
||||
formdata.append('repo_id', this.repositoryid);
|
||||
formdata.append('itemid', this.itemid);
|
||||
if (this.filemanager) { // Filepickers do not have folders
|
||||
formdata.append('savepath', this.filemanager.currentpath);
|
||||
}
|
||||
|
||||
if (this.acceptedtypes.constructor == Array) {
|
||||
for (var i=0; i<this.acceptedtypes.length; i++) {
|
||||
formdata.append('accepted_types[]', this.acceptedtypes[i]);
|
||||
}
|
||||
} else {
|
||||
formdata.append('accepted_types[]', this.acceptedtypes);
|
||||
}
|
||||
|
||||
// Send the file & required details
|
||||
xhr.open("POST", this.url, true);
|
||||
xhr.send(formdata);
|
||||
return true;
|
||||
}
|
||||
};
|
||||
|
||||
dnduploadhelper.init(Y, options);
|
||||
};
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user