UI: markdown component and markdown widget improvements

ui-ngx/src/app/modules/home/components/widget/lib/markdown-widget.component.html

@@ -18,4 +18,5 @@
 <tb-markdown [data]="markdownText" [additionalCompileModules]="[ homeComponentsModule ]"
              [additionalStyles]="additionalStyles"
              [containerClass]="markdownClass"
+             [applyDefaultMarkdownStyle]="applyDefaultMarkdownStyle"
              [context]="{ ctx: ctx }" lineNumbers fallbackToPlainMarkdown (click)="markdownClick($event)"></tb-markdown>

ui-ngx/src/app/modules/home/components/widget/lib/markdown-widget.component.ts

@@ -40,13 +40,14 @@ interface MarkdownWidgetSettings {
   markdownTextPattern: string;
   useMarkdownTextFunction: boolean;
   markdownTextFunction: string;
+  applyDefaultMarkdownStyle: boolean;
   markdownCss: string;
 }
 
 type MarkdownTextFunction = (data: FormattedData[], ctx: WidgetContext) => string;
 
 @Component({
-  selector: 'tb-markdown-widget ',
+  selector: 'tb-markdown-widget',
   templateUrl: './markdown-widget.component.html'
 })
 export class MarkdownWidgetComponent extends PageComponent implements OnInit {
@@ -63,6 +64,7 @@ export class MarkdownWidgetComponent extends PageComponent implements OnInit {
 
   additionalStyles: string[];
 
+  applyDefaultMarkdownStyle = true;
 
   constructor(protected store: Store<AppState>,
               private utils: UtilsService,
@@ -86,6 +88,9 @@ export class MarkdownWidgetComponent extends PageComponent implements OnInit {
       cssString = cssParser.getCSSForEditor(cssString);
       this.additionalStyles = [cssString];
     }
+    if (isDefinedAndNotNull(this.settings.applyDefaultMarkdownStyle)) {
+      this.applyDefaultMarkdownStyle = this.settings.applyDefaultMarkdownStyle;
+    }
     const pageSize = isDefinedAndNotNull(this.ctx.widgetConfig.pageSize) &&
                       this.ctx.widgetConfig.pageSize > 0 ? this.ctx.widgetConfig.pageSize : 16384;
     const pageLink: EntityDataPageLink = {

ui-ngx/src/app/modules/home/components/widget/lib/settings/cards/markdown-widget-settings.component.html

@@ -31,6 +31,9 @@
                       label="{{ 'widgets.markdown.markdown-text-pattern' | translate }}"
                       helpId="widget/editor/widget_js_markdown_pattern">
   </tb-markdown-editor>
+  <mat-slide-toggle class="mat-slide" formControlName="applyDefaultMarkdownStyle">
+    {{ 'widgets.markdown.apply-default-markdown-style' | translate }}
+  </mat-slide-toggle>
   <tb-css formControlName="markdownCss"
           label="{{ 'widgets.markdown.markdown-css' | translate }}">
   </tb-css>

ui-ngx/src/app/modules/home/components/widget/lib/settings/cards/markdown-widget-settings.component.ts

@@ -43,6 +43,7 @@ export class MarkdownWidgetSettingsComponent extends WidgetSettingsComponent {
       useMarkdownTextFunction: false,
       markdownTextPattern: '# Markdown/HTML card \\n - **Current entity**: **${entityName}**. \\n - **Current value**: **${Random}**.',
       markdownTextFunction: 'return \'# Some title\\\\n - Entity name: \' + data[0][\'entityName\'];',
+      applyDefaultMarkdownStyle: true,
       markdownCss: ''
     };
   }
@@ -52,6 +53,7 @@ export class MarkdownWidgetSettingsComponent extends WidgetSettingsComponent {
       useMarkdownTextFunction: [settings.useMarkdownTextFunction, []],
       markdownTextPattern: [settings.markdownTextPattern, []],
       markdownTextFunction: [settings.markdownTextFunction, []],
+      applyDefaultMarkdownStyle: [settings.applyDefaultMarkdownStyle, []],
       markdownCss: [settings.markdownCss, []]
     });
   }

ui-ngx/src/app/shared/components/markdown.component.scss

@@ -357,6 +357,50 @@
       background: 0 0;
       padding: 8px 16px;
       color: #212529;
+
+      .token.atrule, .token.attr-value, .token.keyword {
+        color: #2a7dec;
+      }
+
+      .token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted {
+        color: #eb5757;
+      }
+
+      .token.punctuation {
+        color: #212529;
+      }
+
+      &.line-numbers {
+        padding-left: 66px;
+
+        & > code {
+          span.line-numbers-rows {
+            top: -12px;
+            bottom: -12px;
+            left: -66px;
+            width: 50px;
+            border: none;
+            padding: 8px 12px 8px 18px;
+            text-align: right;
+            background: #f9fbff;
+
+            & > span:before {
+              color: rgba(33, 37, 41, .6);
+              padding-right: 0;
+            }
+          }
+        }
+
+        &.no-line-numbers {
+          padding-left: 16px;
+
+          & > code {
+            span.line-numbers-rows {
+              display: none;
+            }
+          }
+        }
+      }
     }
   }
 }

ui-ngx/src/app/shared/components/markdown.component.ts

@@ -26,6 +26,7 @@ import {
   Input,
   OnChanges,
   Output,
+  Renderer2,
   SimpleChanges,
   Type,
   ViewChild,
@@ -36,9 +37,11 @@ import { MarkdownService, PrismPlugin } from 'ngx-markdown';
 import { DynamicComponentFactoryService } from '@core/services/dynamic-component-factory.service';
 import { coerceBooleanProperty } from '@angular/cdk/coercion';
 import { SHARED_MODULE_TOKEN } from '@shared/components/tokens';
-import { deepClone, isDefinedAndNotNull } from '@core/utils';
+import { deepClone, guid, isDefinedAndNotNull } from '@core/utils';
 import { Observable, of, ReplaySubject } from 'rxjs';
 
+let defaultMarkdownStyle;
+
 @Component({
   selector: 'tb-markdown',
   templateUrl: './markdown.component.html',
@@ -61,6 +64,8 @@ export class TbMarkdownComponent implements OnChanges {
 
   @Input() style: { [klass: string]: any } = {};
 
+  @Input() applyDefaultMarkdownStyle = true;
+
   @Input() additionalStyles: string[];
 
   @Input()
@@ -87,7 +92,8 @@ export class TbMarkdownComponent implements OnChanges {
               private cd: ChangeDetectorRef,
               public markdownService: MarkdownService,
               @Inject(SHARED_MODULE_TOKEN) private sharedModule: Type<any>,
-              private dynamicComponentFactoryService: DynamicComponentFactoryService) {}
+              private dynamicComponentFactoryService: DynamicComponentFactoryService,
+              private renderer: Renderer2) {}
 
   ngOnChanges(changes: SimpleChanges): void {
     if (isDefinedAndNotNull(this.data)) {
@@ -97,15 +103,25 @@ export class TbMarkdownComponent implements OnChanges {
 
   private render(markdown: string) {
     const compiled = this.markdownService.parse(markdown, { decodeHtml: false });
-    let template = this.sanitizeCurlyBraces(compiled);
     let markdownClass = 'tb-markdown-view';
     if (this.markdownClass) {
       markdownClass += ` ${this.markdownClass}`;
     }
-    template = `<div [ngStyle]="style" class="${markdownClass}">${template}</div>`;
+    let template = `<div [ngStyle]="style" class="${markdownClass}">${compiled}</div>`;
     if (this.containerClass) {
       template = `<div class="${this.containerClass}" style="width: 100%; height: 100%;">${template}</div>`;
     }
+    const element: HTMLDivElement = this.renderer.createElement('div');
+    element.innerHTML = template;
+    this.handlePlugins(element);
+    this.markdownService.highlight(element);
+    const preElements = element.querySelectorAll('pre');
+    const matches = Array.from(template.matchAll(/<pre[\S\s]+?(?=<\/pre>)<\/pre>/g));
+    for (let i = 0; i < preElements.length; i++) {
+      const preHtml = preElements.item(i).outerHTML.replace('ngnonbindable=""', 'ngNonBindable');
+      template = template.replace(matches[i][0], preHtml);
+    }
+    template = this.sanitizeCurlyBraces(template);
     this.markdownContainer.clear();
     const parent = this;
     let readyObservable: Observable<void>;
@@ -113,8 +129,14 @@ export class TbMarkdownComponent implements OnChanges {
     if (this.additionalCompileModules) {
       compileModules = compileModules.concat(this.additionalCompileModules);
     }
-    let styles: string[] = deepClone(TbMarkdownComponent['ɵcmp'].styles);
-    styles[0] = styles[0].replace(/\[_nghost\-%COMP%\]/g, '').replace(/\[_ngcontent\-%COMP%\]/g, '');
+    let styles: string[] = [];
+    if (this.applyDefaultMarkdownStyle) {
+      if (!defaultMarkdownStyle) {
+        defaultMarkdownStyle = deepClone(TbMarkdownComponent['ɵcmp'].styles)[0].replace(/\[_nghost\-%COMP%\]/g, '')
+          .replace(/\[_ngcontent\-%COMP%\]/g, '');
+      }
+      styles.push(defaultMarkdownStyle);
+    }
     if (this.additionalStyles) {
       styles = styles.concat(this.additionalStyles);
     }
@@ -139,20 +161,18 @@ export class TbMarkdownComponent implements OnChanges {
           }
         }
         this.tbMarkdownInstanceComponentRef.instance.style = this.style;
-        this.handlePlugins(this.tbMarkdownInstanceComponentRef.location.nativeElement);
-        this.markdownService.highlight(this.tbMarkdownInstanceComponentRef.location.nativeElement);
         readyObservable = this.handleImages(this.tbMarkdownInstanceComponentRef.location.nativeElement);
         this.cd.detectChanges();
         this.error = null;
       } catch (error) {
-        readyObservable = this.handleError(compiled, error);
+        readyObservable = this.handleError(template, error, styles);
       }
       readyObservable.subscribe(() => {
         this.ready.emit();
       });
     },
     (error) => {
-      readyObservable = this.handleError(compiled, error);
+      readyObservable = this.handleError(template, error, styles);
       this.cd.detectChanges();
       readyObservable.subscribe(() => {
         this.ready.emit();
@@ -160,14 +180,24 @@ export class TbMarkdownComponent implements OnChanges {
     });
   }
 
-  private handleError(template: string, error): Observable<void> {
+  private handleError(template: string, error, styles?: string[]): Observable<void> {
     this.error = (error ? error + '' : 'Failed to render markdown!').replace(/\n/g, '<br>');
     this.markdownContainer.clear();
     if (this.fallbackToPlainMarkdownValue) {
       const element = this.fallbackElement.nativeElement;
+      let styleElement;
+      if (styles?.length) {
+        const markdownClass = 'tb-markdown-view-' + guid();
+        let innerStyle = styles.join('\n');
+        innerStyle = innerStyle.replace(/\.tb-markdown-view/g, '.' + markdownClass);
+        template = template.replace(/tb-markdown-view/g, markdownClass);
+        styleElement = this.renderer.createElement('style');
+        styleElement.innerHTML = innerStyle;
+      }
       element.innerHTML = template;
-      this.handlePlugins(element);
-      this.markdownService.highlight(element);
+      if (styleElement) {
+        this.renderer.appendChild(element, styleElement);
+      }
       return this.handleImages(element);
     } else {
       return of(null);

ui-ngx/src/assets/locale/locale.constant-en_US.json

@@ -4678,6 +4678,7 @@
             "use-markdown-text-function": "Use markdown/HTML value function",
             "markdown-text-function": "Markdown/HTML value function",
             "markdown-text-pattern": "Markdown/HTML pattern (markdown or HTML with variables, for ex. '${entityName} or ${keyName} - some text.')",
+            "apply-default-markdown-style": "Apply default markdown style",
             "markdown-css": "Markdown/HTML CSS"
         },
         "simple-card": {

ui-ngx/src/styles.scss

@@ -424,55 +424,6 @@ mat-label {
   }
 }
 
-.tb-markdown-view {
-  pre[class*="language-"] {
-
-    .token.atrule, .token.attr-value, .token.keyword {
-      color: #2a7dec;
-    }
-
-    .token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted {
-      color: #eb5757;
-    }
-
-    .token.punctuation {
-      color: #212529;
-    }
-
-    &.line-numbers {
-      padding-left: 66px;
-
-      & > code {
-        span.line-numbers-rows {
-          top: -12px;
-          bottom: -12px;
-          left: -66px;
-          width: 50px;
-          border: none;
-          padding: 8px 12px 8px 18px;
-          text-align: right;
-          background: #f9fbff;
-
-          & > span:before {
-            color: rgba(33, 37, 41, .6);
-            padding-right: 0;
-          }
-        }
-      }
-
-      &.no-line-numbers {
-        padding-left: 16px;
-
-        & > code {
-          span.line-numbers-rows {
-            display: none;
-          }
-        }
-      }
-    }
-  }
-}
-
 // Tooltipster
 
 .tooltipster-sidetip.tooltipster-tb {