[ADD] web_drop_target

web_drop_target/static/src/js/web_drop_target.js

@@ -0,0 +1,132 @@
+//-*- coding: utf-8 -*-
+//Copyright 2018 Therp BV <https://therp.nl>
+//License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+/*global Uint8Array base64js*/
+
+odoo.define('web_drop_target', function(require) {
+    var Model = require('web.Model'),
+        FormView = require('web.FormView');
+
+    // this is the main contribution of this addon: A mixin you can use
+    // to make some widget a drop target. Read on how to use this yourself
+    var DropTargetMixin = {
+        // add the mime types you want to support here, leave empty for
+        // all types. For more control, override _get_drop_item in your class
+        _drop_allowed_types: [],
+
+        // a class being applied when the user drags something we can handle
+        _drag_over_class: 'o_drag_over',
+
+        start: function() {
+            var result = this._super.apply(this, arguments);
+            this.$el.on('drop.widget_events', this.proxy('_on_drop'));
+            this.$el.on('dragenter.widget_events', this.proxy('_on_dragenter'));
+            this.$el.on('dragover.widget_events', this.proxy('_on_dragenter'));
+            this.$el.on('dragleave.widget_events', this.proxy('_on_dragleave'));
+            return result;
+        },
+
+        _on_drop: function(e) {
+            var drop_item = this._get_drop_item(e);
+            if(!drop_item) {
+                return;
+            }
+            jQuery(e.delegateTarget).removeClass(this._drag_over_class);
+            var reader = new FileReader();
+            reader.onloadend = this.proxy(
+                _.partial(this._handle_file_drop, drop_item.getAsFile())
+            );
+            reader.readAsArrayBuffer(drop_item.getAsFile());
+            e.preventDefault();
+        },
+
+        _on_dragenter: function(e) {
+            if(this._get_drop_item(e)) {
+                e.preventDefault();
+                jQuery(e.delegateTarget).addClass(this._drag_over_class);
+                return false;
+            }
+        },
+
+        _on_dragleave: function(e) {
+            jQuery(e.delegateTarget).removeClass(this._drag_over_class);
+        },
+
+        _get_drop_item: function(e) {
+            var self = this,
+                dataTransfer = e.originalEvent.dataTransfer,
+                drop_item = null;
+            _.each(dataTransfer.items, function(item) {
+                if(
+                    _.contains(self._drop_allowed_types, item.type) ||
+                    _.isEmpty(self._drop_allowed_types)
+                ) {
+                    drop_item = item;
+                }
+            });
+            return drop_item;
+        },
+
+        // eslint-disable-next-line no-unused-vars
+        _handle_file_drop: function(drop_file, e) {
+            // do something here, for example call the helper function below
+            // e is the on_load_end handler for the FileReader above,
+            // so e.target.result contains an ArrayBuffer of the data
+        },
+
+        _handle_file_drop_attach: function(
+                drop_file, e, res_model, res_id, extra_data
+        ) {
+            // helper to upload an attachment and update the sidebar
+            var self = this;
+            return new Model('ir.attachment').call(
+                'create',
+                [
+                    _.extend({
+                        name: drop_file.name,
+                        datas: base64js.fromByteArray(
+                            new Uint8Array(e.target.result)
+                        ),
+                        datas_fname: drop_file.name,
+                        res_model: res_model,
+                        res_id: res_id,
+                    }, extra_data || {})
+                ]
+            )
+            .then(function() {
+                // try to find a sidebar and update it if we found one
+                var p = self;
+                while(p && !p.sidebar) {
+                    p = p.getParent ? p.getParent() : null;
+                }
+                if(p) {
+                    var sidebar = p.sidebar;
+                    sidebar.do_attachement_update(
+                        sidebar.dataset, sidebar.model_id
+                    );
+                }
+            });
+        }
+    };
+
+    // and here we apply the mixin to form views, allowing any files and
+    // adding them as attachment
+    FormView.include(_.extend(DropTargetMixin, {
+        _get_drop_file: function() {
+            // disable drag&drop when we're on an unsaved record
+            if(!this.datarecord.id) {
+                return null;
+            }
+            return this._super.apply(this, arguments);
+        },
+        _handle_file_drop: function(drop_file, e) {
+            return this._handle_file_drop_attach(
+                drop_file, e, this.dataset.model, this.datarecord.id
+            );
+        }
+    }));
+
+    return {
+        'DropTargetMixin': DropTargetMixin,
+    };
+});