Chris@0: /**
Chris@0:  * @file
Chris@0:  * An abstract Backbone View that controls an in-place editor.
Chris@0:  */
Chris@0: 
Chris@0: (function ($, Backbone, Drupal) {
Chris@0:   Drupal.quickedit.EditorView = Backbone.View.extend(/** @lends Drupal.quickedit.EditorView# */{
Chris@0: 
Chris@0:     /**
Chris@0:      * A base implementation that outlines the structure for in-place editors.
Chris@0:      *
Chris@0:      * Specific in-place editor implementations should subclass (extend) this
Chris@0:      * View and override whichever method they deem necessary to override.
Chris@0:      *
Chris@0:      * Typically you would want to override this method to set the
Chris@0:      * originalValue attribute in the FieldModel to such a value that your
Chris@0:      * in-place editor can revert to the original value when necessary.
Chris@0:      *
Chris@0:      * @example
Chris@0:      * <caption>If you override this method, you should call this
Chris@0:      * method (the parent class' initialize()) first.</caption>
Chris@0:      * Drupal.quickedit.EditorView.prototype.initialize.call(this, options);
Chris@0:      *
Chris@0:      * @constructs
Chris@0:      *
Chris@0:      * @augments Backbone.View
Chris@0:      *
Chris@0:      * @param {object} options
Chris@0:      *   An object with the following keys:
Chris@0:      * @param {Drupal.quickedit.EditorModel} options.model
Chris@0:      *   The in-place editor state model.
Chris@0:      * @param {Drupal.quickedit.FieldModel} options.fieldModel
Chris@0:      *   The field model.
Chris@0:      *
Chris@0:      * @see Drupal.quickedit.EditorModel
Chris@0:      * @see Drupal.quickedit.editors.plain_text
Chris@0:      */
Chris@0:     initialize(options) {
Chris@0:       this.fieldModel = options.fieldModel;
Chris@0:       this.listenTo(this.fieldModel, 'change:state', this.stateChange);
Chris@0:     },
Chris@0: 
Chris@0:     /**
Chris@0:      * @inheritdoc
Chris@0:      */
Chris@0:     remove() {
Chris@0:       // The el property is the field, which should not be removed. Remove the
Chris@0:       // pointer to it, then call Backbone.View.prototype.remove().
Chris@0:       this.setElement();
Chris@0:       Backbone.View.prototype.remove.call(this);
Chris@0:     },
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns the edited element.
Chris@0:      *
Chris@0:      * For some single cardinality fields, it may be necessary or useful to
Chris@0:      * not in-place edit (and hence decorate) the DOM element with the
Chris@0:      * data-quickedit-field-id attribute (which is the field's wrapper), but a
Chris@0:      * specific element within the field's wrapper.
Chris@0:      * e.g. using a WYSIWYG editor on a body field should happen on the DOM
Chris@0:      * element containing the text itself, not on the field wrapper.
Chris@0:      *
Chris@0:      * @return {jQuery}
Chris@0:      *   A jQuery-wrapped DOM element.
Chris@0:      *
Chris@0:      * @see Drupal.quickedit.editors.plain_text
Chris@0:      */
Chris@0:     getEditedElement() {
Chris@0:       return this.$el;
Chris@0:     },
Chris@0: 
Chris@0:     /**
Chris@0:      *
Chris@0:      * @return {object}
Chris@0:      * Returns 3 Quick Edit UI settings that depend on the in-place editor:
Chris@0:      *  - Boolean padding: indicates whether padding should be applied to the
Chris@0:      *    edited element, to guarantee legibility of text.
Chris@0:      *  - Boolean unifiedToolbar: provides the in-place editor with the ability
Chris@0:      *    to insert its own toolbar UI into Quick Edit's tightly integrated
Chris@0:      *    toolbar.
Chris@0:      *  - Boolean fullWidthToolbar: indicates whether Quick Edit's tightly
Chris@0:      *    integrated toolbar should consume the full width of the element,
Chris@0:      *    rather than being just long enough to accommodate a label.
Chris@0:      */
Chris@0:     getQuickEditUISettings() {
Chris@0:       return { padding: false, unifiedToolbar: false, fullWidthToolbar: false, popup: false };
Chris@0:     },
Chris@0: 
Chris@0:     /**
Chris@0:      * Determines the actions to take given a change of state.
Chris@0:      *
Chris@0:      * @param {Drupal.quickedit.FieldModel} fieldModel
Chris@0:      *   The quickedit `FieldModel` that holds the state.
Chris@0:      * @param {string} state
Chris@0:      *   The state of the associated field. One of
Chris@0:      *   {@link Drupal.quickedit.FieldModel.states}.
Chris@0:      */
Chris@0:     stateChange(fieldModel, state) {
Chris@0:       const from = fieldModel.previous('state');
Chris@0:       const to = state;
Chris@0:       switch (to) {
Chris@0:         case 'inactive':
Chris@0:           // An in-place editor view will not yet exist in this state, hence
Chris@0:           // this will never be reached. Listed for sake of completeness.
Chris@0:           break;
Chris@0: 
Chris@0:         case 'candidate':
Chris@0:           // Nothing to do for the typical in-place editor: it should not be
Chris@0:           // visible yet. Except when we come from the 'invalid' state, then we
Chris@0:           // clean up.
Chris@0:           if (from === 'invalid') {
Chris@0:             this.removeValidationErrors();
Chris@0:           }
Chris@0:           break;
Chris@0: 
Chris@0:         case 'highlighted':
Chris@0:           // Nothing to do for the typical in-place editor: it should not be
Chris@0:           // visible yet.
Chris@0:           break;
Chris@0: 
Chris@0:         case 'activating': {
Chris@0:           // The user has indicated he wants to do in-place editing: if
Chris@0:           // something needs to be loaded (CSS/JavaScript/server data/…), then
Chris@0:           // do so at this stage, and once the in-place editor is ready,
Chris@0:           // set the 'active' state. A "loading" indicator will be shown in the
Chris@0:           // UI for as long as the field remains in this state.
Chris@0:           const loadDependencies = function (callback) {
Chris@0:             // Do the loading here.
Chris@0:             callback();
Chris@0:           };
Chris@0:           loadDependencies(() => {
Chris@0:             fieldModel.set('state', 'active');
Chris@0:           });
Chris@0:           break;
Chris@0:         }
Chris@0: 
Chris@0:         case 'active':
Chris@0:           // The user can now actually use the in-place editor.
Chris@0:           break;
Chris@0: 
Chris@0:         case 'changed':
Chris@0:           // Nothing to do for the typical in-place editor. The UI will show an
Chris@0:           // indicator that the field has changed.
Chris@0:           break;
Chris@0: 
Chris@0:         case 'saving':
Chris@0:           // When the user has indicated he wants to save his changes to this
Chris@0:           // field, this state will be entered. If the previous saving attempt
Chris@0:           // resulted in validation errors, the previous state will be
Chris@0:           // 'invalid'. Clean up those validation errors while the user is
Chris@0:           // saving.
Chris@0:           if (from === 'invalid') {
Chris@0:             this.removeValidationErrors();
Chris@0:           }
Chris@0:           this.save();
Chris@0:           break;
Chris@0: 
Chris@0:         case 'saved':
Chris@0:           // Nothing to do for the typical in-place editor. Immediately after
Chris@0:           // being saved, a field will go to the 'candidate' state, where it
Chris@0:           // should no longer be visible (after all, the field will then again
Chris@0:           // just be a *candidate* to be in-place edited).
Chris@0:           break;
Chris@0: 
Chris@0:         case 'invalid':
Chris@0:           // The modified field value was attempted to be saved, but there were
Chris@0:           // validation errors.
Chris@0:           this.showValidationErrors();
Chris@0:           break;
Chris@0:       }
Chris@0:     },
Chris@0: 
Chris@0:     /**
Chris@0:      * Reverts the modified value to the original, before editing started.
Chris@0:      */
Chris@0:     revert() {
Chris@0:       // A no-op by default; each editor should implement reverting itself.
Chris@0:       // Note that if the in-place editor does not cause the FieldModel's
Chris@0:       // element to be modified, then nothing needs to happen.
Chris@0:     },
Chris@0: 
Chris@0:     /**
Chris@0:      * Saves the modified value in the in-place editor for this field.
Chris@0:      */
Chris@0:     save() {
Chris@0:       const fieldModel = this.fieldModel;
Chris@0:       const editorModel = this.model;
Chris@0:       const backstageId = `quickedit_backstage-${this.fieldModel.id.replace(/[/[\]_\s]/g, '-')}`;
Chris@0: 
Chris@0:       function fillAndSubmitForm(value) {
Chris@0:         const $form = $(`#${backstageId}`).find('form');
Chris@0:         // Fill in the value in any <input> that isn't hidden or a submit
Chris@0:         // button.
Chris@0:         $form.find(':input[type!="hidden"][type!="submit"]:not(select)')
Chris@0:           // Don't mess with the node summary.
Chris@0:           .not('[name$="\\[summary\\]"]').val(value);
Chris@0:         // Submit the form.
Chris@0:         $form.find('.quickedit-form-submit').trigger('click.quickedit');
Chris@0:       }
Chris@0: 
Chris@0:       const formOptions = {
Chris@0:         fieldID: this.fieldModel.get('fieldID'),
Chris@0:         $el: this.$el,
Chris@0:         nocssjs: true,
Chris@0:         other_view_modes: fieldModel.findOtherViewModes(),
Chris@0:         // Reset an existing entry for this entity in the PrivateTempStore (if
Chris@0:         // any) when saving the field. Logically speaking, this should happen in
Chris@0:         // a separate request because this is an entity-level operation, not a
Chris@0:         // field-level operation. But that would require an additional request,
Chris@0:         // that might not even be necessary: it is only when a user saves a
Chris@0:         // first changed field for an entity that this needs to happen:
Chris@0:         // precisely now!
Chris@0:         reset: !this.fieldModel.get('entity').get('inTempStore'),
Chris@0:       };
Chris@0: 
Chris@0:       const self = this;
Chris@0:       Drupal.quickedit.util.form.load(formOptions, (form, ajax) => {
Chris@0:         // Create a backstage area for storing forms that are hidden from view
Chris@0:         // (hence "backstage" — since the editing doesn't happen in the form, it
Chris@0:         // happens "directly" in the content, the form is only used for saving).
Chris@0:         const $backstage = $(Drupal.theme('quickeditBackstage', { id: backstageId })).appendTo('body');
Chris@0:         // Hidden forms are stuffed into the backstage container for this field.
Chris@0:         const $form = $(form).appendTo($backstage);
Chris@0:         // Disable the browser's HTML5 validation; we only care about server-
Chris@0:         // side validation. (Not disabling this will actually cause problems
Chris@0:         // because browsers don't like to set HTML5 validation errors on hidden
Chris@0:         // forms.)
Chris@0:         $form.prop('novalidate', true);
Chris@0:         const $submit = $form.find('.quickedit-form-submit');
Chris@0:         self.formSaveAjax = Drupal.quickedit.util.form.ajaxifySaving(formOptions, $submit);
Chris@0: 
Chris@0:         function removeHiddenForm() {
Chris@0:           Drupal.quickedit.util.form.unajaxifySaving(self.formSaveAjax);
Chris@0:           delete self.formSaveAjax;
Chris@0:           $backstage.remove();
Chris@0:         }
Chris@0: 
Chris@0:         // Successfully saved.
Chris@0:         self.formSaveAjax.commands.quickeditFieldFormSaved = function (ajax, response, status) {
Chris@0:           removeHiddenForm();
Chris@0:           // First, transition the state to 'saved'.
Chris@0:           fieldModel.set('state', 'saved');
Chris@0:           // Second, set the 'htmlForOtherViewModes' attribute, so that when
Chris@0:           // this field is rerendered, the change can be propagated to other
Chris@0:           // instances of this field, which may be displayed in different view
Chris@0:           // modes.
Chris@0:           fieldModel.set('htmlForOtherViewModes', response.other_view_modes);
Chris@0:           // Finally, set the 'html' attribute on the field model. This will
Chris@0:           // cause the field to be rerendered.
Chris@0:           fieldModel.set('html', response.data);
Chris@0:         };
Chris@0: 
Chris@0:         // Unsuccessfully saved; validation errors.
Chris@0:         self.formSaveAjax.commands.quickeditFieldFormValidationErrors = function (ajax, response, status) {
Chris@0:           removeHiddenForm();
Chris@0:           editorModel.set('validationErrors', response.data);
Chris@0:           fieldModel.set('state', 'invalid');
Chris@0:         };
Chris@0: 
Chris@0:         // The quickeditFieldForm AJAX command is only called upon loading the
Chris@0:         // form for the first time, and when there are validation errors in the
Chris@0:         // form; Form API then marks which form items have errors. This is
Chris@0:         // useful for the form-based in-place editor, but pointless for any
Chris@0:         // other: the form itself won't be visible at all anyway! So, we just
Chris@0:         // ignore it.
Chris@0:         self.formSaveAjax.commands.quickeditFieldForm = function () {};
Chris@0: 
Chris@0:         fillAndSubmitForm(editorModel.get('currentValue'));
Chris@0:       });
Chris@0:     },
Chris@0: 
Chris@0:     /**
Chris@0:      * Shows validation error messages.
Chris@0:      *
Chris@0:      * Should be called when the state is changed to 'invalid'.
Chris@0:      */
Chris@0:     showValidationErrors() {
Chris@0:       const $errors = $('<div class="quickedit-validation-errors"></div>')
Chris@0:         .append(this.model.get('validationErrors'));
Chris@0:       this.getEditedElement()
Chris@0:         .addClass('quickedit-validation-error')
Chris@0:         .after($errors);
Chris@0:     },
Chris@0: 
Chris@0:     /**
Chris@0:      * Cleans up validation error messages.
Chris@0:      *
Chris@0:      * Should be called when the state is changed to 'candidate' or 'saving'. In
Chris@0:      * the case of the latter: the user has modified the value in the in-place
Chris@0:      * editor again to attempt to save again. In the case of the latter: the
Chris@0:      * invalid value was discarded.
Chris@0:      */
Chris@0:     removeValidationErrors() {
Chris@0:       this.getEditedElement()
Chris@0:         .removeClass('quickedit-validation-error')
Chris@0:         .next('.quickedit-validation-errors')
Chris@0:         .remove();
Chris@0:     },
Chris@0: 
Chris@0:   });
Chris@0: }(jQuery, Backbone, Drupal));