Added drawio abilities to markdown editor

resources/assets/js/components/markdown-editor.js

@@ -2,6 +2,8 @@ const MarkdownIt = require("markdown-it");
 const mdTasksLists = require('markdown-it-task-lists');
 const code = require('../libs/code');
 
+const DrawIO = require('../libs/drawio');
+
 class MarkdownEditor {
 
     constructor(elem) {
@@ -20,13 +22,26 @@ class MarkdownEditor {
 
     init() {
 
+        let lastClick = 0;
+
         // Prevent markdown display link click redirect
         this.display.addEventListener('click', event => {
-            let link = event.target.closest('a');
-            if (link === null) return;
+            let isDblClick = Date.now() - lastClick < 300;
 
-            event.preventDefault();
-            window.open(link.getAttribute('href'));
+            let link = event.target.closest('a');
+            if (link !== null) {
+                event.preventDefault();
+                window.open(link.getAttribute('href'));
+                return;
+            }
+
+            let drawing = event.target.closest('[drawio-diagram]');
+            if (drawing !== null && isDblClick) {
+                this.actionEditDrawing(drawing);
+                return;
+            }
+
+            lastClick = Date.now();
         });
 
         // Button actions
@@ -37,6 +52,7 @@ class MarkdownEditor {
             let action = button.getAttribute('data-action');
             if (action === 'insertImage') this.actionInsertImage();
             if (action === 'insertLink') this.actionShowLinkSelector();
+            if (action === 'insertDrawing') this.actionStartDrawing();
         });
 
         window.$events.listen('editor-markdown-update', value => {
@@ -290,6 +306,70 @@ class MarkdownEditor {
         });
     }
 
+    // Show draw.io if enabled and handle save.
+    actionStartDrawing() {
+        if (document.querySelector('[drawio-enabled]').getAttribute('drawio-enabled') !== 'true') return;
+        let cursorPos = this.cm.getCursor('from');
+
+        DrawIO.show(() => {
+            return Promise.resolve('');
+        }, (pngData) => {
+            // let id = "image-" + Math.random().toString(16).slice(2);
+            // let loadingImage = window.baseUrl('/loading.gif');
+            let data = {
+                image: pngData,
+                uploaded_to: Number(document.getElementById('page-editor').getAttribute('page-id'))
+            };
+
+            window.$http.post(window.baseUrl('/images/drawing/upload'), data).then(resp => {
+                let newText = `<div drawio-diagram="${resp.data.id}"><img src="${resp.data.url}"></div>`;
+                this.cm.focus();
+                this.cm.replaceSelection(newText);
+                this.cm.setCursor(cursorPos.line, cursorPos.ch + newText.length);
+                DrawIO.close();
+            }).catch(err => {
+                window.$events.emit('error', trans('errors.image_upload_error'));
+                console.log(err);
+            });
+        });
+    }
+
+    // Show draw.io if enabled and handle save.
+    actionEditDrawing(imgContainer) {
+        if (document.querySelector('[drawio-enabled]').getAttribute('drawio-enabled') !== 'true') return;
+        let cursorPos = this.cm.getCursor('from');
+        let drawingId = imgContainer.getAttribute('drawio-diagram');
+
+        DrawIO.show(() => {
+            return window.$http.get(window.baseUrl(`/images/base64/${drawingId}`)).then(resp => {
+                return `data:image/png;base64,${resp.data.content}`;
+            });
+        }, (pngData) => {
+
+            let data = {
+                image: pngData,
+                uploaded_to: Number(document.getElementById('page-editor').getAttribute('page-id'))
+            };
+
+            window.$http.put(window.baseUrl(`/images/drawing/upload/${drawingId}`), data).then(resp => {
+                let newText = `<div drawio-diagram="${resp.data.id}"><img src="${resp.data.url + `?updated=${Date.now()}`}"></div>`;
+                let newContent = this.cm.getValue().split('\n').map(line => {
+                    if (line.indexOf(`drawio-diagram="${drawingId}"`) !== -1) {
+                        return newText;
+                    }
+                    return line;
+                }).join('\n');
+                this.cm.setValue(newContent);
+                this.cm.setCursor(cursorPos);
+                this.cm.focus();
+                DrawIO.close();
+            }).catch(err => {
+                window.$events.emit('error', trans('errors.image_upload_error'));
+                console.log(err);
+            });
+        });
+    }
+
 }
 
 module.exports = MarkdownEditor ;

resources/assets/js/libs/drawio.js

@@ -9,7 +9,7 @@ let onInit, onSave;
  * @param onInitCallback - Must return a promise with the xml to load for the editor.
  * @param onSaveCallback - Is called with the drawing data on save.
  */
-export function show(onInitCallback, onSaveCallback) {
+function show(onInitCallback, onSaveCallback) {
     onInit = onInitCallback;
     onSave = onSaveCallback;
 
@@ -19,9 +19,10 @@ export function show(onInitCallback, onSaveCallback) {
     iFrame.setAttribute('src', drawIoUrl);
     iFrame.setAttribute('class', 'fullscreen');
     iFrame.style.backgroundColor = '#FFFFFF';
+    document.body.appendChild(iFrame);
 }
 
-export function close() {
+function close() {
     drawEventClose();
 }
 
@@ -52,7 +53,7 @@ function drawEventSave(message) {
 function drawEventInit() {
     if (!onInit) return;
     onInit().then(xml => {
-        drawPostMessage({action: 'load', autosave: 1, xml: ''});
+        drawPostMessage({action: 'load', autosave: 1, xml: xml});
     });
 }
 
@@ -63,4 +64,6 @@ function drawEventClose() {
 
 function drawPostMessage(data) {
     iFrame.contentWindow.postMessage(JSON.stringify(data), '*');
-}
+}
+
+module.exports = {show, close};

resources/assets/sass/_forms.scss

@@ -59,16 +59,21 @@
     border: 1px solid #DDD;
     width: 50%;
   }
-  .markdown-display {
-    padding: 0 $-m 0;
-    margin-left: -1px;
-    overflow-y: scroll;
-  }
-  .markdown-display.page-content {
+}
+
+.markdown-display {
+  padding: 0 $-m 0;
+  margin-left: -1px;
+  overflow-y: scroll;
+  &.page-content {
     margin: 0 auto;
     max-width: 100%;
   }
+  [drawio-diagram]:hover {
+    outline: 2px solid $primary;
+  }
 }
+
 .editor-toolbar {
   width: 100%;
   padding: $-xs $-m;

resources/lang/en/entities.php

@@ -162,6 +162,7 @@ return [
     'pages_md_preview' => 'Preview',
     'pages_md_insert_image' => 'Insert Image',
     'pages_md_insert_link' => 'Insert Entity Link',
+    'pages_md_insert_drawing' => 'Insert Drawing',
     'pages_not_in_chapter' => 'Page is not in a chapter',
     'pages_move' => 'Move Page',
     'pages_move_success' => 'Page moved to ":parentName"',

resources/views/pages/form.blade.php

@@ -86,6 +86,10 @@
                     <div class="editor-toolbar">
                         <span class="float left">{{ trans('entities.pages_md_editor') }}</span>
                         <div class="float right buttons">
+                            @if(config('services.drawio'))
+                                <button class="text-button" type="button" data-action="insertDrawing"><i class="zmdi zmdi-widgets"></i>{{ trans('entities.pages_md_insert_drawing') }}</button>
+                                &nbsp;|&nbsp
+                            @endif
                             <button class="text-button" type="button" data-action="insertImage"><i class="zmdi zmdi-image"></i>{{ trans('entities.pages_md_insert_image') }}</button>
                             &nbsp;|&nbsp;
                             <button class="text-button" type="button" data-action="insertLink"><i class="zmdi zmdi-link"></i>{{ trans('entities.pages_md_insert_link') }}</button>