Improve support for snippets throughout Winter CMS

Plugin.php

@@ -227,6 +227,35 @@ public function boot()
                 Classes\Page::class,
             ];
         });
+
+        BaseBackendController::extend(function ($controller) {
+            $user = BackendAuth::getUser();
+            if (!$user || !$user->hasAccess('winter.pages.access_snippets')) {
+                return;
+            }
+
+            // Add the AJAX handlers required for snippet inspector properties
+            // to function on all backend controllers
+            $controller->addDynamicMethod('onGetInspectorConfiguration', function() {
+                return (new StaticPage)->onGetInspectorConfiguration();
+            });
+            $controller->addDynamicMethod('onGetSnippetNames', function() {
+                return (new StaticPage)->onGetSnippetNames();
+            });
+            $controller->addDynamicMethod('onInspectableGetOptions', function() {
+                return (new StaticPage)->onInspectableGetOptions();
+            });
+
+            FroalaFormWidget::extend(function ($widget) {
+                // Adds default base CSS/JS for snippets
+                $widget->addCss('/plugins/winter/pages/assets/css/pages.css', 'Winter.Pages');
+                $widget->addJs('/plugins/winter/pages/assets/js/pages-page.js', 'Winter.Pages');
+                $widget->addJs('/plugins/winter/pages/assets/js/pages-snippets.js', 'Winter.Pages');
+
+                // Adds custom assets for the Froala snippet button
+                $widget->addJs('/plugins/winter/pages/assets/js/froala-snippets.js', 'Winter.Pages');
+            });
+        });
     }
 
     /**
@@ -236,7 +265,8 @@ public function registerMarkupTags(): array
     {
         return [
             'filters' => [
-                'staticPage' => ['Winter\Pages\Classes\Page', 'url']
+                'staticPage'    => ['Winter\Pages\Classes\Page', 'url'],
+                'parseSnippets' => ['Winter\Pages\Classes\Snippet', 'parse'],
             ]
         ];
     }

assets/js/froala-snippets.js

@@ -0,0 +1,132 @@
+(function ($) {
+    // Adds snippets to the default Froala buttons
+    // Places it after the quote button to keep dropdowns together
+    $.wn.richEditorButtons.splice(3, 0, 'snippets');
+
+    // Define a dropdown button.
+    $.FroalaEditor.RegisterCommand('snippets', {
+        // Button title.
+        title: 'Snippets',
+
+        // Mark the button as a dropdown.
+        type: 'dropdown',
+
+        // Specify the icon for the button.
+        // If this option is not specified, the button name will be used.
+        icon: '<i class="icon-newspaper-o"></i>',
+
+        // The dropdown HTML
+        html: function() {
+            if (!$.wn.snippets) {
+                return '<div style="padding:10px;">No snippets are currently defined.</div>';
+            }
+
+            var html = '<ul class="fr-dropdown-list">';
+
+            $.each($.wn.snippets, function(i, snippet) {
+                html += '<li><a class="fr-command" data-cmd="snippets" data-param1="' + snippet.snippet + '" title="' + snippet.name + '">' + snippet.name + '</a></li>';
+            });
+
+            return html + '</ul>';
+        },
+
+        // Save the dropdown action into undo stack.
+        undo: true,
+
+        // Focus inside the editor before callback.
+        focus: true,
+
+        // Refresh the button state after the callback.
+        refreshAfterCallback: true,
+
+        // Callback.
+        callback: function (cmd, val, params) {
+            var options = $.wn.snippets[val];
+
+            if (options) {
+                // Get editor element. OC2's richeditor has 2 nested data-control=richeditor, we want the outer one
+                var $editor = this.$el.parents('[data-control="richeditor"]:not([data-richeditor-vue])');
+
+                var $snippetNode = $('<figure contenteditable="false" data-inspector-css-class="hero">&nbsp;</figure>');
+
+                if (options.component) {
+                    $snippetNode.attr({
+                        'data-component': options.component,
+                        'data-inspector-class': options.component
+                    })
+
+                    // If a component-based snippet was added, make sure that
+                    // its code is unique, as it will be used as a component
+                    // alias.
+
+                    /*
+                    // Init a new snippet manager
+
+                    // Below code reattaches the inspector event, causing duplicate inspector options
+                    // Until I can figure a solution, I have copied the code to this file...
+
+                    var snippetManager = new $.wn.pages.snippetManager;
+                    options.snippet = snippetManager.generateUniqueComponentSnippetCode(options.component, options.snippet, $editor.parent())
+                    */
+
+                    options.snippet = generateUniqueComponentSnippetCode(options.component, options.snippet, $editor.parent());
+                }
+
+                $snippetNode.attr({
+                    'data-snippet': options.snippet,
+                    'data-name': options.name,
+                    'tabindex': '0',
+                    'draggable': 'true',
+                    'data-ui-block': 'true'
+                })
+
+                $snippetNode.addClass('fr-draggable');
+
+                // Insert the content
+                this.figures.insert($snippetNode);
+            }
+
+        }
+    });
+
+    generateUniqueComponentSnippetCode = function(componentClass, originalCode, $pageForm) {
+        var updatedCode = originalCode,
+            counter = 1,
+            snippetFound = false
+
+        do {
+            snippetFound = false
+
+            $('[data-control="richeditor"] textarea', $pageForm).each(function() {
+                var $textarea = $(this),
+                    $codeDom = $('<div>' + $textarea.val() + '</div>')
+
+                if ($codeDom.find('[data-snippet="'+updatedCode+'"][data-component]').length > 0) {
+                    snippetFound = true
+                    updatedCode = originalCode + counter
+                    counter++
+
+                    return false
+                }
+            })
+
+        } while (snippetFound)
+
+        return updatedCode
+    };
+
+
+    /**
+     * Because the pages-snippets.js is injected after the richeditor script, it will register its
+     * initialization hooks too late. Here we need to force initialization in order to work with forms
+     * that are displayed on page load (i.e. Winter.Blog).
+     */
+    $(document).ready(function() {
+        var $editor = $('[data-control="richeditor"]:not([data-richeditor-vue])');
+
+        if ($.wn.pagesPage && !window.location.pathname.includes('winter/pages')) {
+            $.wn.pagesPage.snippetManager.initSnippets($editor);
+        }
+    });
+
+})(jQuery);