Update paste code to add a paragraph when the clipboard contains atleast a block element

packages/roosterjs-content-model-core/lib/command/paste/generatePasteOptionFromPlugins.ts

@@ -36,6 +36,7 @@ export function generatePasteOptionFromPlugins(
         htmlAttributes: htmlFromClipboard.metadata,
         pasteType: pasteType,
         domToModelOption,
+        containsBlockElements: !!htmlFromClipboard.containsBlockElements,
     };
 
     return pasteType == 'asPlainText'

packages/roosterjs-content-model-core/lib/command/paste/mergePasteContent.ts

@@ -10,7 +10,6 @@ import {
 } from 'roosterjs-content-model-dom';
 import type {
     BeforePasteEvent,
-    ClipboardData,
     CloneModelOptions,
     ContentModelDocument,
     ContentModelSegmentFormat,
@@ -37,12 +36,15 @@ export function cloneModelForPaste(model: ReadonlyContentModelDocument) {
 /**
  * @internal
  */
-export function mergePasteContent(
-    editor: IEditor,
-    eventResult: BeforePasteEvent,
-    clipboardData: ClipboardData
-) {
-    const { fragment, domToModelOption, customizedMerge, pasteType } = eventResult;
+export function mergePasteContent(editor: IEditor, eventResult: BeforePasteEvent) {
+    const {
+        fragment,
+        domToModelOption,
+        customizedMerge,
+        pasteType,
+        clipboardData,
+        containsBlockElements,
+    } = eventResult;
 
     editor.formatContentModel(
         (model, context) => {
@@ -64,6 +66,7 @@ export function mergePasteContent(
             const mergeOption: MergeModelOption = {
                 mergeFormat: pasteType == 'mergeFormat' ? 'keepSourceEmphasisFormat' : 'none',
                 mergeTable: shouldMergeTable(pasteModel),
+                addParagraphAfterMergedContent: containsBlockElements,
             };
 
             const insertPoint = customizedMerge
@@ -74,7 +77,9 @@ export function mergePasteContent(
                 context.newPendingFormat = {
                     ...EmptySegmentFormat,
                     ...model.format,
-                    ...insertPoint.marker.format,
+                    ...(pasteType == 'normal' && !containsBlockElements
+                        ? getLastSegmentFormat(pasteModel)
+                        : insertPoint.marker.format),
                 };
             }
 
@@ -124,3 +129,19 @@ function shouldMergeTable(pasteModel: ContentModelDocument): boolean | undefined
     // Only merge table when the document contain a single table.
     return pasteModel.blocks.length === 1 && pasteModel.blocks[0].blockType === 'Table';
 }
+
+function getLastSegmentFormat(pasteModel: ContentModelDocument): ContentModelSegmentFormat {
+    if (pasteModel.blocks.length == 1) {
+        const [firstBlock] = pasteModel.blocks;
+
+        if (firstBlock.blockType == 'Paragraph') {
+            const segment = firstBlock.segments[firstBlock.segments.length - 1];
+
+            return {
+                ...segment.format,
+            };
+        }
+    }
+
+    return {};
+}

packages/roosterjs-content-model-core/lib/command/paste/paste.ts

@@ -67,7 +67,7 @@ export function paste(
     convertInlineCss(eventResult.fragment, htmlFromClipboard.globalCssRules);
 
     // 6. Merge pasted content into main Content Model
-    mergePasteContent(editor, eventResult, clipboardData);
+    mergePasteContent(editor, eventResult);
 }
 
 function createDOMFromHtml(

packages/roosterjs-content-model-core/lib/command/paste/retrieveHtmlInfo.ts

@@ -1,4 +1,4 @@
-import { isNodeOfType, toArray } from 'roosterjs-content-model-dom';
+import { isBlockElement, isNodeOfType, toArray } from 'roosterjs-content-model-dom';
 import { retrieveCssRules } from '../createModelFromHtml/convertInlineCss';
 import type { ClipboardData } from 'roosterjs-content-model-types';
 import type { CssRule } from '../createModelFromHtml/convertInlineCss';
@@ -14,6 +14,7 @@ export interface HtmlFromClipboard {
     globalCssRules: CssRule[];
     htmlBefore?: string;
     htmlAfter?: string;
+    containsBlockElements?: boolean;
 }
 
 /**
@@ -33,6 +34,7 @@ export function retrieveHtmlInfo(
             ...retrieveHtmlStrings(clipboardData),
             globalCssRules: retrieveCssRules(doc),
             metadata: retrieveMetadata(doc),
+            containsBlockElements: checkBlockElements(doc),
         };
 
         clipboardData.htmlFirstLevelChildTags = retrieveTopLevelTags(doc);
@@ -96,3 +98,9 @@ function retrieveHtmlStrings(
 
     return { htmlBefore, htmlAfter };
 }
+
+function checkBlockElements(doc: Document): boolean {
+    const elements = toArray(doc.body.querySelectorAll('*'));
+
+    return elements.some(el => isNodeOfType(el, 'ELEMENT_NODE') && isBlockElement(el));
+}

packages/roosterjs-content-model-core/test/command/paste/generatePasteOptionFromPluginsTest.ts

@@ -55,6 +55,7 @@ describe('generatePasteOptionFromPlugins', () => {
             htmlBefore,
             htmlAfter,
             htmlAttributes: mockedMetadata,
+            containsBlockElements: false,
         } as any);
         expect(triggerPluginEventSpy).toHaveBeenCalledTimes(1);
         expect(originalEvent).toEqual({
@@ -74,6 +75,7 @@ describe('generatePasteOptionFromPlugins', () => {
                 styleSanitizers: {},
                 attributeSanitizers: {},
             },
+            containsBlockElements: false,
         });
         expect(triggerPluginEventSpy).toHaveBeenCalledWith(
             'beforePaste',
@@ -86,6 +88,7 @@ describe('generatePasteOptionFromPlugins', () => {
                 htmlAttributes: mockedMetadata,
                 pasteType: 'TypeResult',
                 domToModelOption: 'OptionResult',
+                containsBlockElements: false,
             },
             true
         );
@@ -126,6 +129,7 @@ describe('generatePasteOptionFromPlugins', () => {
             htmlBefore,
             htmlAfter,
             htmlAttributes: mockedMetadata,
+            containsBlockElements: false,
         } as any);
         expect(triggerPluginEventSpy).toHaveBeenCalledTimes(1);
         expect(triggerPluginEventSpy).toHaveBeenCalledWith(
@@ -140,6 +144,7 @@ describe('generatePasteOptionFromPlugins', () => {
                 pasteType: 'TypeResult',
                 domToModelOption: 'OptionResult',
                 customizedMerge: mockedCustomizedMerge,
+                containsBlockElements: false,
             },
             true
         );
@@ -174,6 +179,7 @@ describe('generatePasteOptionFromPlugins', () => {
             htmlBefore: '',
             htmlAfter: '',
             htmlAttributes: mockedMetadata,
+            containsBlockElements: false,
         } as any);
         expect(triggerPluginEventSpy).toHaveBeenCalledTimes(1);
         expect(triggerPluginEventSpy).toHaveBeenCalledWith(
@@ -187,6 +193,7 @@ describe('generatePasteOptionFromPlugins', () => {
                 htmlAttributes: mockedMetadata,
                 pasteType: 'TypeResult',
                 domToModelOption: 'OptionResult',
+                containsBlockElements: false,
             },
             true
         );
@@ -207,6 +214,7 @@ describe('generatePasteOptionFromPlugins', () => {
                 styleSanitizers: {},
                 attributeSanitizers: {},
             },
+            containsBlockElements: false,
         });
     });
 
@@ -244,6 +252,7 @@ describe('generatePasteOptionFromPlugins', () => {
             htmlBefore,
             htmlAfter,
             htmlAttributes: mockedMetadata,
+            containsBlockElements: false,
         });
         expect(triggerPluginEventSpy).toHaveBeenCalledTimes(0);
     });

packages/roosterjs-content-model-core/test/command/paste/htmlTemplates/ClipboardContent1.ts

@@ -165,3 +165,9 @@ export const template: Readonly<string> = `
     </body>
 </html>
 `;
+
+export const inlineTemplate: Readonly<string> = `
+<html>
+    <body>
+        <span>Inline text</span></body>
+</html>`;