Merge pull request #5304 from CatoTH/change-recommendations-for-amendments

Change recommendations for amendments

client/src/app/core/repositories/motions/change-recommendation-repository.service.ts

@@ -18,6 +18,7 @@ import {
 import { ChangeRecoMode } from 'app/site/motions/motions.constants';
 import { BaseRepository } from '../base-repository';
 import { DiffService, LineRange, ModificationType } from '../../ui-services/diff.service';
+import { LinenumberingService } from '../../ui-services/linenumbering.service';
 import { ViewMotion } from '../../../site/motions/models/view-motion';
 import { ViewUnifiedChange } from '../../../shared/models/motions/view-unified-change';
 
@@ -50,7 +51,9 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<
      * @param {CollectionStringMapperService} mapperService Maps collection strings to classes
      * @param {ViewModelStoreService} viewModelStoreService
      * @param {TranslateService} translate
+     * @param {RelationManagerService} relationManager
      * @param {DiffService} diffService
+     * @param {LinenumberingService} lineNumbering Line numbering service
      */
     public constructor(
         DS: DataStoreService,
@@ -59,7 +62,8 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
         relationManager: RelationManagerService,
-        private diffService: DiffService
+        private diffService: DiffService,
+        private lineNumbering: LinenumberingService
     ) {
         super(
             DS,
@@ -103,7 +107,7 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<
     /**
      * Synchronously getting the change recommendations of the corresponding motion.
      *
-     * @param motionId the id of the target motion
+     * @param motion_id the id of the target motion
      * @returns the array of change recommendations to the motions.
      */
     public getChangeRecoOfMotion(motion_id: number): ViewMotionChangeRecommendation[] {
@@ -171,22 +175,61 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<
      * @param {LineRange} lineRange
      * @param {number} lineLength
      */
-    public createChangeRecommendationTemplate(
+    public createMotionChangeRecommendationTemplate(
         motion: ViewMotion,
         lineRange: LineRange,
         lineLength: number
     ): ViewMotionChangeRecommendation {
+        const motionText = this.lineNumbering.insertLineNumbers(motion.text, lineLength);
+
         const changeReco = new MotionChangeRecommendation();
         changeReco.line_from = lineRange.from;
         changeReco.line_to = lineRange.to;
         changeReco.type = ModificationType.TYPE_REPLACEMENT;
-        changeReco.text = this.diffService.extractMotionLineRange(motion.text, lineRange, false, lineLength, null);
+        changeReco.text = this.diffService.extractMotionLineRange(motionText, lineRange, false, lineLength, null);
         changeReco.rejected = false;
         changeReco.motion_id = motion.id;
 
         return new ViewMotionChangeRecommendation(changeReco);
     }
 
+    /**
+     * Creates a {@link ViewMotionChangeRecommendation} object based on the amendment ID, the precalculated
+     * paragraphs (because we don't have access to motion-repository serice here) and the given lange range.
+     * This object is not saved yet and does not yet have any changed HTML. It's meant to populate the UI form.
+     *
+     * @param {ViewMotion} amendment
+     * @param {string[]} lineNumberedParagraphs
+     * @param {LineRange} lineRange
+     * @param {number} lineLength
+     */
+    public createAmendmentChangeRecommendationTemplate(
+        amendment: ViewMotion,
+        lineNumberedParagraphs: string[],
+        lineRange: LineRange,
+        lineLength: number
+    ): ViewMotionChangeRecommendation {
+        const consolidatedText = lineNumberedParagraphs.join('\n');
+
+        const extracted = this.diffService.extractRangeByLineNumbers(consolidatedText, lineRange.from, lineRange.to);
+        const extractedHtml =
+            extracted.outerContextStart +
+            extracted.innerContextStart +
+            extracted.html +
+            extracted.innerContextEnd +
+            extracted.outerContextEnd;
+
+        const changeReco = new MotionChangeRecommendation();
+        changeReco.line_from = lineRange.from;
+        changeReco.line_to = lineRange.to;
+        changeReco.type = ModificationType.TYPE_REPLACEMENT;
+        changeReco.rejected = false;
+        changeReco.motion_id = amendment.id;
+        changeReco.text = extractedHtml;
+
+        return new ViewMotionChangeRecommendation(changeReco);
+    }
+
     /**
      * Creates a {@link ViewMotionChangeRecommendation} object to change the title, based on the motion ID.
      * This object is not saved yet and does not yet have any changed title. It's meant to populate the UI form.

client/src/app/core/repositories/motions/motion-repository.service.ts

@@ -37,7 +37,7 @@ import { BaseIsAgendaItemAndListOfSpeakersContentObjectRepository } from '../bas
 import { NestedModelDescriptors } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataSendService } from '../../core-services/data-send.service';
-import { LinenumberingService, LineNumberRange } from '../../ui-services/linenumbering.service';
+import { LineNumberedString, LinenumberingService, LineNumberRange } from '../../ui-services/linenumbering.service';
 
 type SortProperty = 'weight' | 'identifier';
 
@@ -201,11 +201,14 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
      * @param DS The DataStore
      * @param mapperService Maps collection strings to classes
      * @param dataSend sending changed objects
+     * @param viewModelStoreService ViewModelStoreService
+     * @param translate
+     * @param relationManager
      * @param httpService OpenSlides own Http service
      * @param lineNumbering Line numbering for motion text
      * @param diff Display changes in motion text as diff.
-     * @param personalNoteService service fo personal notes
      * @param config ConfigService (subscribe to sorting config)
+     * @param operator
      */
     public constructor(
         DS: DataStoreService,
@@ -322,7 +325,16 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
             ownKey: 'diffLines',
             get: (motion: Motion, viewMotion: ViewMotion) => {
                 if (viewMotion.parent) {
-                    return this.getAmendmentParagraphs(viewMotion, this.motionLineLength, false);
+                    const changeRecos = viewMotion.changeRecommendations.filter(changeReco =>
+                        changeReco.showInFinalView()
+                    );
+                    return this.getAmendmentParagraphLines(
+                        viewMotion,
+                        this.motionLineLength,
+                        ChangeRecoMode.Changed,
+                        changeRecos,
+                        false
+                    );
                 }
             },
             getCacheObjectToCheck: (viewMotion: ViewMotion) => viewMotion.parent
@@ -376,7 +388,7 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
     /**
      * Set the state of motions in bulk
      *
-     * @param viewMotion target motion
+     * @param viewMotions target motions
      * @param stateId the number that indicates the state
      */
     public async setMultiState(viewMotions: ViewMotion[], stateId: number): Promise<void> {
@@ -390,7 +402,7 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
     /**
      * Set the motion blocks of motions in bulk
      *
-     * @param viewMotion target motion
+     * @param viewMotions target motions
      * @param motionblockId the number that indicates the motion block
      */
     public async setMultiMotionBlock(viewMotions: ViewMotion[], motionblockId: number): Promise<void> {
@@ -404,7 +416,7 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
     /**
      * Set the category of motions in bulk
      *
-     * @param viewMotion target motion
+     * @param viewMotions target motions
      * @param categoryId the number that indicates the category
      */
     public async setMultiCategory(viewMotions: ViewMotion[], categoryId: number): Promise<void> {
@@ -609,11 +621,12 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
                 case ChangeRecoMode.Diff:
                     const text = [];
                     const changesToShow = changes.filter(change => change.showInDiffView());
+                    const motionText = this.lineNumbering.insertLineNumbers(targetMotion.text, lineLength);
 
                     for (let i = 0; i < changesToShow.length; i++) {
                         text.push(
                             this.diff.extractMotionLineRange(
-                                targetMotion.text,
+                                motionText,
                                 {
                                     from: i === 0 ? 1 : changesToShow[i - 1].getLineTo(),
                                     to: changesToShow[i].getLineFrom()
@@ -624,18 +637,11 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
                             )
                         );
 
-                        text.push(
-                            this.diff.getChangeDiff(targetMotion.text, changesToShow[i], lineLength, highlightLine)
-                        );
+                        text.push(this.diff.getChangeDiff(motionText, changesToShow[i], lineLength, highlightLine));
                     }
 
                     text.push(
-                        this.diff.getTextRemainderAfterLastChange(
-                            targetMotion.text,
-                            changesToShow,
-                            lineLength,
-                            highlightLine
-                        )
+                        this.diff.getTextRemainderAfterLastChange(motionText, changesToShow, lineLength, highlightLine)
                     );
                     return text.join('');
                 case ChangeRecoMode.Final:
@@ -760,66 +766,173 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
     }
 
     /**
-     * Returns all paragraphs that are affected by the given amendment in diff-format
+     * Returns the amended paragraphs by an amendment. Correlates to the amendment_paragraphs field,
+     * but also considers relevant change recommendations.
+     * The returned array includes "null" values for paragraphs that have not been changed.
      *
      * @param {ViewMotion} amendment
      * @param {number} lineLength
+     * @param {ViewMotionChangeRecommendation[]} changes
+     * @param {boolean} includeUnchanged
+     * @returns {string[]}
+     */
+    public applyChangesToAmendment(
+        amendment: ViewMotion,
+        lineLength: number,
+        changes: ViewMotionChangeRecommendation[],
+        includeUnchanged: boolean
+    ): string[] {
+        const motion = amendment.parent;
+        const baseParagraphs = this.getTextParagraphs(motion, true, lineLength);
+
+        // Changes need to be applied from the bottom up, to prevent conflicts with changing line numbers.
+        changes.sort((change1: ViewUnifiedChange, change2: ViewUnifiedChange) => {
+            if (change1.getLineFrom() < change2.getLineFrom()) {
+                return 1;
+            } else if (change1.getLineFrom() > change2.getLineFrom()) {
+                return -1;
+            } else {
+                return 0;
+            }
+        });
+
+        return amendment.amendment_paragraphs.map((newText: string, paraNo: number) => {
+            let paragraph: string;
+            let paragraphHasChanges;
+
+            if (newText === null) {
+                paragraph = baseParagraphs[paraNo];
+                paragraphHasChanges = false;
+            } else {
+                // Add line numbers to newText, relative to the baseParagraph, by creating a diff
+                // to the line numbered base version any applying it right away
+                const diff = this.diff.diff(baseParagraphs[paraNo], newText);
+                paragraph = this.diff.diffHtmlToFinalText(diff);
+                paragraphHasChanges = true;
+            }
+
+            const affected: LineNumberRange = this.lineNumbering.getLineNumberRange(paragraph);
+
+            changes.forEach((change: ViewMotionChangeRecommendation) => {
+                // Hint: this assumes that change recommendations only affect one specific paragraph, not multiple
+                if (change.line_from >= affected.from && change.line_from < affected.to) {
+                    paragraph = this.diff.replaceLines(paragraph, change.text, change.line_from, change.line_to);
+
+                    // Reapply relative line numbers
+                    const diff = this.diff.diff(baseParagraphs[paraNo], paragraph);
+                    paragraph = this.diff.diffHtmlToFinalText(diff);
+
+                    paragraphHasChanges = true;
+                }
+            });
+
+            if (paragraphHasChanges || includeUnchanged) {
+                return paragraph;
+            } else {
+                return null;
+            }
+        });
+    }
+
+    /**
+     * Returns all paragraph lines that are affected by the given amendment in diff-format, including context
+     *
+     * @param {ViewMotion} amendment
+     * @param {number} lineLength
+     * @param {ChangeRecoMode} crMode
+     * @param {ViewMotionChangeRecommendation[]} changeRecommendations
      * @param {boolean} includeUnchanged
      * @returns {DiffLinesInParagraph}
      */
-    public getAmendmentParagraphs(
+    public getAmendmentParagraphLines(
         amendment: ViewMotion,
         lineLength: number,
+        crMode: ChangeRecoMode,
+        changeRecommendations: ViewMotionChangeRecommendation[],
         includeUnchanged: boolean
     ): DiffLinesInParagraph[] {
         const motion = amendment.parent;
         const baseParagraphs = this.getTextParagraphs(motion, true, lineLength);
 
-        return (amendment.amendment_paragraphs || [])
+        let amendmentParagraphs;
+        if (crMode === ChangeRecoMode.Changed) {
+            amendmentParagraphs = this.applyChangesToAmendment(amendment, lineLength, changeRecommendations, true);
+        } else {
+            amendmentParagraphs = amendment.amendment_paragraphs || [];
+        }
+
+        return amendmentParagraphs
             .map(
                 (newText: string, paraNo: number): DiffLinesInParagraph => {
                     if (newText !== null) {
-                        return this.diff.getAmendmentParagraphsLinesByMode(
+                        return this.diff.getAmendmentParagraphsLines(
                             paraNo,
                             baseParagraphs[paraNo],
                             newText,
                             lineLength
                         );
                     } else {
-                        // Nothing has changed in this paragraph
-                        if (includeUnchanged) {
-                            const paragraph_line_range = this.lineNumbering.getLineNumberRange(baseParagraphs[paraNo]);
-                            return {
-                                paragraphNo: paraNo,
-                                paragraphLineFrom: paragraph_line_range.from,
-                                paragraphLineTo: paragraph_line_range.to,
-                                diffLineFrom: paragraph_line_range.to,
-                                diffLineTo: paragraph_line_range.to,
-                                textPre: baseParagraphs[paraNo],
-                                text: '',
-                                textPost: ''
-                            } as DiffLinesInParagraph;
-                        } else {
-                            return null; // null will make this paragraph filtered out
-                        }
+                        return null; // Nothing has changed in this paragraph
                     }
                 }
             )
+            .map((diffLines: DiffLinesInParagraph, paraNo: number) => {
+                // If nothing has changed and we want to keep unchanged paragraphs for the context,
+                // return the original text in "textPre"
+                if (diffLines === null && includeUnchanged) {
+                    const paragraph_line_range = this.lineNumbering.getLineNumberRange(baseParagraphs[paraNo]);
+                    return {
+                        paragraphNo: paraNo,
+                        paragraphLineFrom: paragraph_line_range.from,
+                        paragraphLineTo: paragraph_line_range.to,
+                        diffLineFrom: paragraph_line_range.to,
+                        diffLineTo: paragraph_line_range.to,
+                        textPre: baseParagraphs[paraNo],
+                        text: '',
+                        textPost: ''
+                    } as DiffLinesInParagraph;
+                } else {
+                    return diffLines;
+                }
+            })
             .filter((para: DiffLinesInParagraph) => para !== null);
     }
 
+    public getAmendmentParagraphLinesTitle(paragraph: DiffLinesInParagraph): string {
+        if (paragraph.diffLineTo === paragraph.diffLineFrom + 1) {
+            return this.translate.instant('Line') + ' ' + paragraph.diffLineFrom.toString(10);
+        } else {
+            return (
+                this.translate.instant('Line') +
+                ' ' +
+                paragraph.diffLineFrom.toString(10) +
+                ' - ' +
+                (paragraph.diffLineTo - 1).toString(10)
+            );
+        }
+    }
+
     /**
      * Returns all paragraphs that are affected by the given amendment as unified change objects.
+     * Only the affected part of each paragraph is returned.
+     * Change recommendations to this amendment are considered here, too. That is, if a change recommendation
+     * for an amendment exists and is not rejected, the changed amendment will be returned here.
      *
      * @param {ViewMotion} amendment
      * @param {number} lineLength
+     * @param {ViewMotionChangeRecommendation[]} changeRecos
      * @returns {ViewMotionAmendedParagraph[]}
      */
-    public getAmendmentAmendedParagraphs(amendment: ViewMotion, lineLength: number): ViewMotionAmendedParagraph[] {
+    public getAmendmentAmendedParagraphs(
+        amendment: ViewMotion,
+        lineLength: number,
+        changeRecos: ViewMotionChangeRecommendation[]
+    ): ViewMotionAmendedParagraph[] {
         const motion = amendment.parent;
         const baseParagraphs = this.getTextParagraphs(motion, true, lineLength);
+        const changedAmendmentParagraphs = this.applyChangesToAmendment(amendment, lineLength, changeRecos, false);
 
-        return (amendment.amendment_paragraphs || [])
+        return changedAmendmentParagraphs
             .map(
                 (newText: string, paraNo: number): ViewMotionAmendedParagraph => {
                     if (newText === null) {
@@ -844,6 +957,42 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
             .filter((para: ViewMotionAmendedParagraph) => para !== null);
     }
 
+    /**
+     * For unchanged paragraphs, this returns the original motion paragraph, including line numbers.
+     * For changed paragraphs, this returns the content of the amendment_paragraphs-field,
+     *     but including line numbers relative to the original motion line numbers,
+     *     so they can be used for the amendment change recommendations
+     *
+     * @param {ViewMotion} amendment
+     * @param {number} lineLength
+     * @param {boolean} withDiff
+     * @returns {LineNumberedString[]}
+     */
+    public getAllAmendmentParagraphsWithOriginalLineNumbers(
+        amendment: ViewMotion,
+        lineLength: number,
+        withDiff: boolean
+    ): LineNumberedString[] {
+        const motion = amendment.parent;
+        const baseParagraphs = this.getTextParagraphs(motion, true, lineLength);
+
+        return (amendment.amendment_paragraphs || []).map((newText: string, paraNo: number): string => {
+            const origText = baseParagraphs[paraNo];
+
+            if (newText === null) {
+                return origText;
+            }
+
+            const diff = this.diff.diff(origText, newText);
+
+            if (withDiff) {
+                return diff;
+            } else {
+                return this.diff.diffHtmlToFinalText(diff);
+            }
+        });
+    }
+
     /**
      * Signals the acceptance of the current recommendation to the server
      *

client/src/app/core/ui-services/diff.service.spec.ts

@@ -1172,6 +1172,28 @@ describe('DiffService', () => {
                 );
             }
         ));
+
+        it('detects a word replacement at the end of line correctly', inject([DiffService], (service: DiffService) => {
+            const before =
+                '<p>' +
+                noMarkup(1) +
+                'wuid Brotzeit? Pfenningguat Stubn bitt da, hog di hi fei nia need nia need Goaßmaß ' +
+                brMarkup(2) +
+                'gscheid kloan mim';
+            const after =
+                '<P>wuid Brotzeit? Pfenningguat Stubn bitt da, ' +
+                'hog di hi fei nia need nia need Radler gscheid kloan mim';
+
+            const diff = service.diff(before, after);
+            expect(diff).toBe(
+                '<p>' +
+                    noMarkup(1) +
+                    'wuid Brotzeit? Pfenningguat Stubn bitt da, ' +
+                    'hog di hi fei nia need nia need <del>Goaßmaß </del><ins>Radler </ins>' +
+                    brMarkup(2) +
+                    'gscheid kloan mim</p>'
+            );
+        }));
     });
 
     describe('addCSSClassToFirstTag function', () => {

client/src/app/core/ui-services/diff.service.ts

@@ -1,6 +1,6 @@
 import { Injectable } from '@angular/core';
 
-import { LinenumberingService } from './linenumbering.service';
+import { LineNumberedString, LinenumberingService } from './linenumbering.service';
 import { ViewUnifiedChange } from '../../shared/models/motions/view-unified-change';
 
 const ELEMENT_NODE = 1;
@@ -1318,12 +1318,12 @@ export class DiffService {
      * - extracting line 2 to 3 results in <p class="os-split-after os-split-before">Line 2</p>
      * - extracting line 3 to null/4 results in <p class="os-split-before">Line 3</p>
      *
-     * @param {string} htmlIn
+     * @param {LineNumberedString} htmlIn
      * @param {number} fromLine
      * @param {number} toLine
      * @returns {ExtractedContent}
      */
-    public extractRangeByLineNumbers(htmlIn: string, fromLine: number, toLine: number): ExtractedContent {
+    public extractRangeByLineNumbers(htmlIn: LineNumberedString, fromLine: number, toLine: number): ExtractedContent {
         if (typeof htmlIn !== 'string') {
             throw new Error('Invalid call - extractRangeByLineNumbers expects a string as first argument');
         }
@@ -1878,15 +1878,28 @@ export class DiffService {
         // Remove <del> tags that only delete line numbers
         // We need to do this before removing </del><del> as done in one of the next statements
         diffUnnormalized = diffUnnormalized.replace(
-            /<del>((<BR CLASS="os-line-break"><\/del><del>)?(<span[^>]+os-line-number[^>]+?>)(\s|<\/?del>)*<\/span>)<\/del>/gi,
-            (found: string, tag: string, br: string, span: string): string => {
-                return (br !== undefined ? br : '') + span + ' </span>';
+            /<del>(((<BR CLASS="os-line-break">)<\/del><del>)?(<span[^>]+os-line-number[^>]+?>)(\s|<\/?del>)*<\/span>)<\/del>/gi,
+            (found: string, tag: string, brWithDel: string, plainBr: string, span: string): string => {
+                return (plainBr !== undefined ? plainBr : '') + span + ' </span>';
             }
         );
 
         // Merging individual insert/delete statements into bigger blocks
         diffUnnormalized = diffUnnormalized.replace(/<\/ins><ins>/gi, '').replace(/<\/del><del>/gi, '');
 
+        // If we have a <del>deleted word</del>LINEBREAK<ins>new word</ins>, let's assume that the insertion
+        // was actually done in the same line as the deletion.
+        // We don't have the LINEBREAK-markers in the new string, hence we can't be a 100% sure, but
+        // this will probably the more frequent case.
+        // This only really makes a differences for change recommendations anyway, where we split the text into lines
+        // Hint: if there is no deletion before the line break, we have the same issue, but cannot solve this here.
+        diffUnnormalized = diffUnnormalized.replace(
+            /(<\/del>)(<BR CLASS="os-line-break"><span[^>]+os-line-number[^>]+?>\s*<\/span>)(<ins>[\s\S]*?<\/ins>)/gi,
+            (found: string, del: string, br: string, ins: string): string => {
+                return del + ins + br;
+            }
+        );
+
         // If only a few characters of a word have changed, don't display this as a replacement of the whole word,
         // but only of these specific characters
         diffUnnormalized = diffUnnormalized.replace(
@@ -2138,7 +2151,7 @@ export class DiffService {
      * @param {number} lineLength the line length
      * @return {DiffLinesInParagraph|null}
      */
-    public getAmendmentParagraphsLinesByMode(
+    public getAmendmentParagraphsLines(
         paragraphNo: number,
         origText: string,
         newText: string,
@@ -2190,20 +2203,18 @@ export class DiffService {
      * Returns the HTML with the changes, optionally with a highlighted line.
      * The original motion needs to be provided.
      *
-     * @param {string} motionHtml
+     * @param {LineNumberedString} html
      * @param {ViewUnifiedChange} change
      * @param {number} lineLength
      * @param {number} highlight
      * @returns {string}
      */
     public getChangeDiff(
-        motionHtml: string,
+        html: LineNumberedString,
         change: ViewUnifiedChange,
         lineLength: number,
         highlight?: number
     ): string {
-        const html = this.lineNumberingService.insertLineNumbers(motionHtml, lineLength);
-
         let data, oldText;
 
         try {
@@ -2248,14 +2259,14 @@ export class DiffService {
     /**
      * Returns the remainder text of the motion after the last change
      *
-     * @param {string} motionHtml
+     * @param {LineNumberedString} motionHtml
      * @param {ViewUnifiedChange[]} changes
      * @param {number} lineLength
      * @param {number} highlight
      * @returns {string}
      */
     public getTextRemainderAfterLastChange(
-        motionHtml: string,
+        motionHtml: LineNumberedString,
         changes: ViewUnifiedChange[],
         lineLength: number,
         highlight?: number
@@ -2267,15 +2278,14 @@ export class DiffService {
             }
         }, 0);
 
-        const numberedHtml = this.lineNumberingService.insertLineNumbers(motionHtml, lineLength, highlight);
         if (changes.length === 0) {
-            return numberedHtml;
+            return motionHtml;
         }
 
         let data;
 
         try {
-            data = this.extractRangeByLineNumbers(numberedHtml, maxLine, null);
+            data = this.extractRangeByLineNumbers(motionHtml, maxLine, null);
         } catch (e) {
             // This only happens (as far as we know) when the motion text has been altered (shortened)
             // without modifying the change recommendations accordingly.
@@ -2305,21 +2315,20 @@ export class DiffService {
     /**
      * Extracts a renderable HTML string representing the given line number range of this motion text
      *
-     * @param {string} motionText
+     * @param {LineNumberedString} motionText
      * @param {LineRange} lineRange
      * @param {boolean} lineNumbers - weather to add line numbers to the returned HTML string
      * @param {number} lineLength
      * @param {number|null} highlightedLine
      */
     public extractMotionLineRange(
-        motionText: string,
+        motionText: LineNumberedString,
         lineRange: LineRange,
         lineNumbers: boolean,
         lineLength: number,
         highlightedLine: number
     ): string {
-        const origHtml = this.lineNumberingService.insertLineNumbers(motionText, lineLength, highlightedLine);
-        const extracted = this.extractRangeByLineNumbers(origHtml, lineRange.from, lineRange.to);
+        const extracted = this.extractRangeByLineNumbers(motionText, lineRange.from, lineRange.to);
         let html =
             extracted.outerContextStart +
             extracted.innerContextStart +

client/src/app/core/ui-services/linenumbering.service.ts

@@ -3,6 +3,11 @@ import { Injectable } from '@angular/core';
 const ELEMENT_NODE = 1;
 const TEXT_NODE = 3;
 
+/**
+ * A helper to indicate that certain functions expect the provided HTML strings to contain line numbers
+ */
+export type LineNumberedString = string;
+
 /**
  * Specifies a point within a HTML Text Node where a line break might be possible, if the following word
  * exceeds the maximum line length.
@@ -894,7 +899,7 @@ export class LinenumberingService {
         highlight?: number,
         callback?: () => void,
         firstLine?: number
-    ): string {
+    ): LineNumberedString {
         let newHtml, newRoot;
 
         if (highlight > 0) {

client/src/app/site/motions/models/view-motion.ts

@@ -199,7 +199,6 @@ export class ViewMotion extends BaseViewModelWithAgendaItemAndListOfSpeakers<Mot
      * Extract the lines of the amendments
      * If an amendments has multiple changes, they will be printed like an array of strings
      *
-     * @param amendment the motion to create the amendment to
      * @return The lines of the amendment
      */
     public getChangeLines(): string {

client/src/app/site/motions/modules/motion-detail/components/motion-detail-diff/motion-detail-diff.component.ts

@@ -6,8 +6,10 @@ import { Title } from '@angular/platform-browser';
 import { TranslateService } from '@ngx-translate/core';
 
 import { ChangeRecommendationRepositoryService } from 'app/core/repositories/motions/change-recommendation-repository.service';
+import { MotionRepositoryService } from 'app/core/repositories/motions/motion-repository.service';
 import { ConfigService } from 'app/core/ui-services/config.service';
 import { DiffService, LineRange } from 'app/core/ui-services/diff.service';
+import { LineNumberedString, LinenumberingService } from 'app/core/ui-services/linenumbering.service';
 import { PromptService } from 'app/core/ui-services/prompt.service';
 import { ViewUnifiedChange, ViewUnifiedChangeType } from 'app/shared/models/motions/view-unified-change';
 import { mediumDialogSettings } from 'app/shared/utils/dialog-settings';
@@ -84,7 +86,9 @@ export class MotionDetailDiffComponent extends BaseViewComponent implements Afte
      * @param translate
      * @param matSnackBar
      * @param diff
+     * @param lineNumbering
      * @param recoRepo
+     * @param motionRepo
      * @param dialogService
      * @param configService
      * @param el
@@ -95,7 +99,9 @@ export class MotionDetailDiffComponent extends BaseViewComponent implements Afte
         protected translate: TranslateService, // protected required for ng-translate-extract
         matSnackBar: MatSnackBar,
         private diff: DiffService,
+        private lineNumbering: LinenumberingService,
         private recoRepo: ChangeRecommendationRepositoryService,
+        private motionRepo: MotionRepositoryService,
         private dialogService: MatDialog,
         private configService: ConfigService,
         private el: ElementRef,
@@ -123,13 +129,16 @@ export class MotionDetailDiffComponent extends BaseViewComponent implements Afte
             return '';
         }
 
-        return this.diff.extractMotionLineRange(
-            this.motion.text,
-            lineRange,
-            true,
-            this.lineLength,
-            this.highlightedLine
-        );
+        let baseText: LineNumberedString;
+        if (this.motion.isParagraphBasedAmendment()) {
+            baseText = this.motionRepo
+                .getAllAmendmentParagraphsWithOriginalLineNumbers(this.motion, this.lineLength, true)
+                .join('\n');
+        } else {
+            baseText = this.lineNumbering.insertLineNumbers(this.motion.text, this.lineLength);
+        }
+
+        return this.diff.extractMotionLineRange(baseText, lineRange, true, this.lineLength, this.highlightedLine);
     }
 
     /**
@@ -158,7 +167,15 @@ export class MotionDetailDiffComponent extends BaseViewComponent implements Afte
      * @param {ViewUnifiedChange} change
      */
     public getDiff(change: ViewUnifiedChange): string {
-        return this.diff.getChangeDiff(this.motion.text, change, this.lineLength, this.highlightedLine);
+        let motionHtml: string;
+        if (this.motion.isParagraphBasedAmendment()) {
+            const parentMotion = this.motionRepo.getViewModel(this.motion.parent_id);
+            motionHtml = parentMotion.text;
+        } else {
+            motionHtml = this.motion.text;
+        }
+        const baseHtml = this.lineNumbering.insertLineNumbers(motionHtml, this.lineLength);
+        return this.diff.getChangeDiff(baseHtml, change, this.lineLength, this.highlightedLine);
     }
 
     /**
@@ -168,12 +185,15 @@ export class MotionDetailDiffComponent extends BaseViewComponent implements Afte
         if (!this.lineLength) {
             return ''; // @TODO This happens in the test case when the lineLength-variable is not set
         }
-        return this.diff.getTextRemainderAfterLastChange(
-            this.motion.text,
-            this.changes,
-            this.lineLength,
-            this.highlightedLine
-        );
+        let baseText: LineNumberedString;
+        if (this.motion.isParagraphBasedAmendment()) {
+            baseText = this.motionRepo
+                .getAllAmendmentParagraphsWithOriginalLineNumbers(this.motion, this.lineLength, true)
+                .join('\n');
+        } else {
+            baseText = this.lineNumbering.insertLineNumbers(this.motion.text, this.lineLength);
+        }
+        return this.diff.getTextRemainderAfterLastChange(baseText, this.changes, this.lineLength, this.highlightedLine);
     }
 
     /**

client/src/app/site/motions/modules/motion-detail/components/motion-detail-original-change-recommendations/motion-detail-original-change-recommendations.component.ts

@@ -1,4 +1,5 @@
 import {
+    ChangeDetectorRef,
     Component,
     ElementRef,
     EventEmitter,
@@ -15,16 +16,23 @@ import { LineRange, ModificationType } from 'app/core/ui-services/diff.service';
 import { ViewMotionChangeRecommendation } from 'app/site/motions/models/view-motion-change-recommendation';
 
 /**
- * This component displays the original motion text with annotated change commendations
- * and a method to create new change recommendations from the line numbers to the left of the text.
- * It's called from motion-details for displaying the whole motion text as well as from the diff view to show the
- * unchanged parts of the motion.
+ * This component displays either the original motion text or the original amendment diff text
+ * with annotated change commendations and a method to create new change recommendations
+ * from the line numbers to the left of the text.
+ * It's called from motion-details for displaying the whole motion text as well as from the
+ * motion's or amendment's diff view to show the unchanged parts of the motion.
  *
  * The line numbers are provided within the pre-rendered HTML, so we have to work with raw HTML
  * and native HTML elements.
  *
  * It takes the styling from the parent component.
  *
+ * Special hints regarding amendments:
+ * When used for paragraph-based amendments, this component is embedded once for each paragraph. Hence,
+ * not all changeRecommendations provided are relevant for this paragraph (as we put the decision about
+ * which changeRecommendations are relevant in this component, not the caller).
+ * TODO: Right now, only change recommendations affecting only one paragraph are supported
+ *
  * ## Examples
  *
  * ```html
@@ -63,12 +71,25 @@ export class MotionDetailOriginalChangeRecommendationsComponent implements OnIni
 
     public can_manage = false;
 
+    // Calculated from the embedded line numbers after the text has been set.
+    // Hint: this numbering refers to the actual lines, not the line number markers;
+    // hence, if maxLineNo === 10, line no. 10 is still visible.
+    // This is semantically different from the diff algorithms.
+    private minLineNo: number = null;
+    private maxLineNo: number = null;
+
     /**
      * @param {Renderer2} renderer
      * @param {ElementRef} el
+     * @param {ChangeDetectorRef} cd
      * @param {OperatorService} operator
      */
-    public constructor(private renderer: Renderer2, private el: ElementRef, private operator: OperatorService) {
+    public constructor(
+        private renderer: Renderer2,
+        private el: ElementRef,
+        private cd: ChangeDetectorRef,
+        private operator: OperatorService
+    ) {
         this.operator.getUserObservable().subscribe(this.onPermissionsChanged.bind(this));
     }
 
@@ -107,7 +128,21 @@ export class MotionDetailOriginalChangeRecommendationsComponent implements OnIni
     }
 
     public getTextChangeRecommendations(): ViewMotionChangeRecommendation[] {
-        return this.changeRecommendations.filter(reco => !reco.isTitleChange());
+        return this.changeRecommendations
+            .filter(reco => !reco.isTitleChange())
+            .filter(reco => reco.line_from >= this.minLineNo && reco.line_from <= this.maxLineNo);
+    }
+
+    private setLineNumberCache(): void {
+        Array.from(this.element.querySelectorAll('.os-line-number')).forEach((lineNumberEl: Element) => {
+            const lineNumber = parseInt(lineNumberEl.getAttribute('data-line-number'), 10);
+            if (this.minLineNo === null || lineNumber < this.minLineNo) {
+                this.minLineNo = lineNumber;
+            }
+            if (this.maxLineNo === null || lineNumber > this.maxLineNo) {
+                this.maxLineNo = lineNumber;
+            }
+        });
     }
 
     /**
@@ -282,7 +317,9 @@ export class MotionDetailOriginalChangeRecommendationsComponent implements OnIni
         // If we show it right away, there will be nasty Angular warnings about changed values, as the position
         // is changing while the DOM updates
         window.setTimeout(() => {
+            this.setLineNumberCache();
             this.showChangeRecommendations = true;
+            this.cd.detectChanges();
         }, 1);
     }
 

client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.html

@@ -530,7 +530,6 @@
                     [matMenuTriggerFor]="changeRecoMenu"
                     *ngIf="
                         motion &&
-                        !motion.isParagraphBasedAmendment() &&
                         ((allChangingObjects && allChangingObjects.length) || motion.modified_final_version)
                     "
                 >
@@ -874,33 +873,40 @@
             <div class="alert alert-info" *ngIf="motion.diffLines.length === 0">
                 <span>{{ 'No changes at the text.' | translate }}</span>
             </div>
-            <div
-                *ngFor="let paragraph of getAmendmentParagraphs(showAmendmentContext)"
-                class="motion-text motion-text-diff amendment-view"
-                [class.line-numbers-none]="isLineNumberingNone()"
-                [class.line-numbers-inline]="isLineNumberingInline()"
-                [class.line-numbers-outside]="isLineNumberingOutside()"
-                [class.amendment-context]="showAmendmentContext"
-            >
-                <!-- TODO: everything here is required for PDF as well. Should be in a service -->
-                <h3
-                    *ngIf="paragraph.diffLineTo === paragraph.diffLineFrom + 1 && !showAmendmentContext"
-                    class="amendment-line-header"
+            <ng-container *ngIf="!isRecoMode(ChangeRecoMode.Diff) && !isFinalEdit">
+                <div
+                    *ngFor="let paragraph of getAmendmentParagraphs()"
+                    class="motion-text motion-text-diff amendment-view"
+                    [class.line-numbers-none]="isLineNumberingNone()"
+                    [class.line-numbers-inline]="isLineNumberingInline()"
+                    [class.line-numbers-outside]="isLineNumberingOutside()"
+                    [class.amendment-context]="showAmendmentContext"
                 >
-                    {{ 'Line' | translate }} {{ paragraph.diffLineFrom }}:
-                </h3>
-                <h3
-                    *ngIf="paragraph.diffLineTo !== paragraph.diffLineFrom + 1 && !showAmendmentContext"
-                    class="amendment-line-header"
-                >
-                    {{ 'Line' | translate }} {{ paragraph.diffLineFrom }} - {{ paragraph.diffLineTo - 1 }}:
-                </h3>
+                    <h3 class="amendment-line-header" *ngIf="!showAmendmentContext">{{ getAmendmentParagraphLinesTitle(paragraph) }}</h3>
 
-                <!-- TODO: Seems to be directly duplicated in the slide -->
-                <div class="paragraphcontext" [innerHtml]="paragraph.textPre | trust: 'html'"></div>
-                <div [innerHtml]="paragraph.text | trust: 'html'"></div>
-                <div class="paragraphcontext" [innerHtml]="paragraph.textPost | trust: 'html'"></div>
-            </div>
+                    <os-motion-detail-original-change-recommendations
+                        *ngIf="isLineNumberingOutside() && (isRecoMode(ChangeRecoMode.Original) || isRecoMode(ChangeRecoMode.Changed))"
+                        [html]="getAmendmentDiffTextWithContext(paragraph)"
+                        [changeRecommendations]="changeRecommendations"
+                        (createChangeRecommendation)="createChangeRecommendation($event)"
+                        (gotoChangeRecommendation)="gotoChangeRecommendation($event)"
+                    ></os-motion-detail-original-change-recommendations>
+                    <div
+                        *ngIf="!isLineNumberingOutside() || !(isRecoMode(ChangeRecoMode.Original) || isRecoMode(ChangeRecoMode.Changed))"
+                        [outerHTML]="getAmendmentDiffTextWithContext(paragraph) | trust: 'html'"
+                    ></div><!-- the <div> element is only a placeholder -> outerHTML to replace it -->
+                </div>
+            </ng-container>
+
+            <os-motion-detail-diff
+                *ngIf="isRecoMode(ChangeRecoMode.Diff)"
+                [motion]="motion"
+                [changes]="getChangesForDiffMode()"
+                [scrollToChange]="scrollToChange"
+                [highlightedLine]="highlightedLine"
+                [lineNumberingMode]="lnMode"
+                (createChangeRecommendation)="createChangeRecommendation($event)"
+            ></os-motion-detail-diff>
         </div>
         <div *ngIf="!motion.diffLines">
             <span class="red-warning-text">{{
@@ -910,7 +916,7 @@
     </section>
 
     <!-- Show entire motion text -->
-    <div>
+    <div *ngIf="isRecoMode(ChangeRecoMode.Original) || isRecoMode(ChangeRecoMode.Changed)">
         <mat-checkbox
             (change)="showAmendmentContext = !showAmendmentContext"
             *ngIf="motion && motion.isParagraphBasedAmendment()"
@@ -953,7 +959,10 @@
     </div>
 </mat-menu>
 
-<!-- Diff View Menu -->
+<!-- Diff View Menu
+     For motions, all items are available if there are changing objects. The final print template only after is has been created.
+     For paragraph-based amendments, only the original and the diff version is available.
+-->
 <mat-menu #changeRecoMenu="matMenu">
     <button
         mat-menu-item
@@ -982,13 +991,13 @@
         mat-menu-item
         (click)="setChangeRecoMode(ChangeRecoMode.Final)"
         [ngClass]="{ selected: crMode === ChangeRecoMode.Final }"
-        *ngIf="allChangingObjects && allChangingObjects.length"
+        *ngIf="motion && !motion.isParagraphBasedAmendment() && allChangingObjects && allChangingObjects.length"
     >
         {{ 'Final version' | translate }}
     </button>
     <button
         mat-menu-item
-        *ngIf="motion && motion.modified_final_version"
+        *ngIf="motion && motion.modified_final_version && !motion.isParagraphBasedAmendment()"
         (click)="setChangeRecoMode(ChangeRecoMode.ModifiedFinal)"
         [ngClass]="{ selected: crMode === ChangeRecoMode.ModifiedFinal }"
     >

client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.ts

@@ -215,10 +215,21 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
     public changeRecommendations: ViewMotionChangeRecommendation[];
 
     /**
-     * All amendments to this motions
+     * All amendments to this motion
      */
     public amendments: ViewMotion[];
 
+    /**
+     * The change recommendations to amendments to this motion
+     */
+    public amendmentChangeRecos: { [amendmentId: string]: ViewMotionChangeRecommendation[] } = {};
+
+    /**
+     * The observables for the `amendmentChangeRecos` field above.
+     * Necessary to track which amendments' change recommendations we have already subscribed to.
+     */
+    public amendmentChangeRecoSubscriptions: { [amendmentId: string]: Subscription } = {};
+
     /**
      * All change recommendations AND amendments, sorted by line number.
      */
@@ -416,25 +427,25 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
      * @param repo Motion Repository
      * @param changeRecoRepo Change Recommendation Repository
      * @param statuteRepo: Statute Paragraph Repository
-     * @param mediafileRepo Mediafile Repository
-     * @param DS The DataStoreService
      * @param configService The configuration provider
      * @param promptService ensure safe deletion
      * @param pdfExport export the motion to pdf
      * @param personalNoteService: personal comments and favorite marker
      * @param linenumberingService The line numbering service
      * @param categoryRepo Repository for categories
-     * @param viewModelStore accessing view models
-     * @param categoryRepo access the category repository
      * @param userRepo Repository for users
      * @param notifyService: NotifyService work with notification
      * @param tagRepo
-     * @param mediaFilerepo
      * @param workflowRepo
      * @param blockRepo
      * @param itemRepo
      * @param motionSortService
-     * @param motionFilterListService
+     * @param amendmentSortService
+     * @param motionFilterService
+     * @param amendmentFilterService
+     * @param cd ChangeDetectorRef
+     * @param pollDialog
+     * @param motionPollService
      */
     public constructor(
         title: Title,
@@ -590,6 +601,24 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
         });
     }
 
+    /**
+     * Subscribes to all new amendment's change recommendations so we can access their data for the diff view
+     */
+    private resetAmendmentChangeRecoListener(): void {
+        this.amendments.forEach((amendment: ViewMotion) => {
+            if (this.amendmentChangeRecoSubscriptions[amendment.id] === undefined) {
+                this.amendmentChangeRecoSubscriptions[
+                    amendment.id
+                ] = this.changeRecoRepo
+                    .getChangeRecosOfMotionObservable(amendment.id)
+                    .subscribe((changeRecos: ViewMotionChangeRecommendation[]): void => {
+                        this.amendmentChangeRecos[amendment.id] = changeRecos;
+                        this.recalcUnifiedChanges();
+                    });
+            }
+        });
+    }
+
     /**
      * Merges amendments and change recommendations and sorts them by the line numbers.
      * Called each time one of these arrays changes.
@@ -614,8 +643,12 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
         }
         if (this.amendments) {
             this.amendments.forEach((amendment: ViewMotion): void => {
+                const toApplyChanges = (this.amendmentChangeRecos[amendment.id] || []).filter(
+                    // The rejected change recommendations for amendments should not be considered
+                    change => change.showInFinalView()
+                );
                 this.repo
-                    .getAmendmentAmendedParagraphs(amendment, this.lineLength)
+                    .getAmendmentAmendedParagraphs(amendment, this.lineLength, toApplyChanges)
                     .forEach((change: ViewUnifiedChange): void => {
                         this.allChangingObjects.push(change);
                     });
@@ -630,6 +663,14 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
                 return 0;
             }
         });
+
+        // When "diff" is the default view mode, the crMode might have been set
+        // before the motion and allChangingObjects have been loaded. As the availability of "diff" depends on
+        // allChangingObjects, we set "diff" first in this case (in the config-listener) and perform the actual
+        // check if "diff" is possible now.
+        // Test: "diff" as default view. Open a motion, create an amendment. "Original" should be set automatically.
+        this.crMode = this.determineCrMode(this.crMode);
+
         this.cd.markForCheck();
     }
 
@@ -664,6 +705,7 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
 
                 this.repo.amendmentsTo(motionId).subscribe((amendments: ViewMotion[]): void => {
                     this.amendments = amendments;
+                    this.resetAmendmentChangeRecoListener();
                     this.recalcUnifiedChanges();
                 }),
                 this.repo
@@ -908,15 +950,48 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
         return formatedText;
     }
 
+    /**
+     * This returns the plain HTML of a changed area in an amendment, including its context,
+     * for the purpose of piping it into <motion-detail-original-change-recommendations>.
+     * This component works with plain HTML, hence we are composing plain HTML here, too.
+     *
+     * @param {DiffLinesInParagraph} paragraph
+     * @returns {string}
+     *
+     * TODO: Seems to be directly duplicated in the slide
+     */
+    public getAmendmentDiffTextWithContext(paragraph: DiffLinesInParagraph): string {
+        return (
+            '<div class="paragraphcontext">' +
+            paragraph.textPre +
+            '</div>' +
+            '<div>' +
+            paragraph.text +
+            '</div>' +
+            '<div class="paragraphcontext">' +
+            paragraph.textPost +
+            '</div>'
+        );
+    }
+
     /**
      * If `this.motion` is an amendment, this returns the list of all changed paragraphs.
      * TODO: Cleanup: repo function could be injected part of the model, to have easier access
      *
-     * @param {boolean} includeUnchanged
      * @returns {DiffLinesInParagraph[]}
      */
-    public getAmendmentParagraphs(includeUnchanged: boolean): DiffLinesInParagraph[] {
-        return this.repo.getAmendmentParagraphs(this.motion, this.lineLength, includeUnchanged);
+    public getAmendmentParagraphs(): DiffLinesInParagraph[] {
+        return this.repo.getAmendmentParagraphLines(
+            this.motion,
+            this.lineLength,
+            this.crMode,
+            this.changeRecommendations,
+            this.showAmendmentContext
+        );
+    }
+
+    public getAmendmentParagraphLinesTitle(paragraph: DiffLinesInParagraph): string {
+        return this.repo.getAmendmentParagraphLinesTitle(paragraph);
     }
 
     /**
@@ -1063,12 +1138,27 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
             editChangeRecommendation: false,
             newChangeRecommendation: true,
             lineRange: lineRange,
-            changeRecommendation: this.changeRecoRepo.createChangeRecommendationTemplate(
+            changeRecommendation: null
+        };
+        if (this.motion.isParagraphBasedAmendment()) {
+            const lineNumberedParagraphs = this.repo.getAllAmendmentParagraphsWithOriginalLineNumbers(
+                this.motion,
+                this.lineLength,
+                false
+            );
+            data.changeRecommendation = this.changeRecoRepo.createAmendmentChangeRecommendationTemplate(
+                this.motion,
+                lineNumberedParagraphs,
+                lineRange,
+                this.lineLength
+            );
+        } else {
+            data.changeRecommendation = this.changeRecoRepo.createMotionChangeRecommendationTemplate(
                 this.motion,
                 lineRange,
                 this.lineLength
-            )
-        };
+            );
+        }
         this.dialogService.open(MotionChangeRecommendationDialogComponent, {
             ...mediumDialogSettings,
             data: data
@@ -1329,7 +1419,8 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
     /**
      * Adds or removes a tag to the current motion
      *
-     * @param id Motion tag id
+     * @param {MouseEvent} event
+     * @param {number} id Motion tag id
      */
     public setTag(event: MouseEvent, id: number): void {
         event.stopPropagation();
@@ -1497,7 +1588,7 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
      * Function to handle leaving persons and
      * recognize if there is no other person editing the same motion anymore.
      *
-     * @param senderId The id of the sender who has left the editing-view.
+     * @param senderName The name of the sender who has left the editing-view.
      */
     private recognizeOtherWorkerOnMotion(senderName: string): void {
         this.otherWorkOnMotion = this.otherWorkOnMotion.filter(value => value !== senderName);

client/src/app/site/motions/services/motion-csv-export.service.ts

@@ -64,7 +64,14 @@ export class MotionCsvExportService {
         const amendments = this.motionRepo.getAmendmentsInstantly(motion.id);
         if (amendments) {
             for (const amendment of amendments) {
-                const changedParagraphs = this.motionRepo.getAmendmentAmendedParagraphs(amendment, lineLength);
+                const changeRecos = this.changeRecoRepo
+                    .getChangeRecoOfMotion(amendment.id)
+                    .filter(reco => reco.showInFinalView());
+                const changedParagraphs = this.motionRepo.getAmendmentAmendedParagraphs(
+                    amendment,
+                    lineLength,
+                    changeRecos
+                );
                 for (const change of changedParagraphs) {
                     changes.push(change as ViewUnifiedChange);
                 }

client/src/app/site/motions/services/motion-pdf.service.ts

@@ -576,17 +576,16 @@ export class MotionPdfService {
         if (motion.isParagraphBasedAmendment()) {
             // this is logically redundant with the formation of amendments in the motion-detail html.
             // Should be refactored in a way that a service returns the correct html for both cases
-            for (const paragraph of this.motionRepo.getAmendmentParagraphs(motion, lineLength, false)) {
-                if (paragraph.diffLineTo === paragraph.diffLineFrom + 1) {
-                    motionText += `<h3>
-                        ${this.translate.instant('Line')} ${paragraph.diffLineFrom}:
-                    </h3>`;
-                } else {
-                    motionText += `<h3>
-                        ${this.translate.instant('Line')} ${paragraph.diffLineFrom} - ${paragraph.diffLineTo - 1}:
-                    </h3>`;
-                }
-
+            const changeRecos = this.changeRecoRepo.getChangeRecoOfMotion(motion.id);
+            const amendmentParas = this.motionRepo.getAmendmentParagraphLines(
+                motion,
+                lineLength,
+                crMode,
+                changeRecos,
+                false
+            );
+            for (const paragraph of amendmentParas) {
+                motionText += '<h3>' + this.motionRepo.getAmendmentParagraphLinesTitle(paragraph) + '</h3>';
                 motionText += `<div class="paragraphcontext">${paragraph.textPre}</div>`;
                 motionText += paragraph.text;
                 motionText += `<div class="paragraphcontext">${paragraph.textPost}</div>`;
@@ -634,11 +633,12 @@ export class MotionPdfService {
         return this.changeRecoRepo
             .getChangeRecoOfMotion(motion.id)
             .concat(
-                this.motionRepo
-                    .getAmendmentsInstantly(motion.id)
-                    .flatMap((amendment: ViewMotion) =>
-                        this.motionRepo.getAmendmentAmendedParagraphs(amendment, lineLength)
-                    )
+                this.motionRepo.getAmendmentsInstantly(motion.id).flatMap((amendment: ViewMotion) => {
+                    const changeRecos = this.changeRecoRepo
+                        .getChangeRecoOfMotion(amendment.id)
+                        .filter(reco => reco.showInFinalView());
+                    return this.motionRepo.getAmendmentAmendedParagraphs(amendment, lineLength, changeRecos);
+                })
             )
             .sort((a, b) => a.getLineFrom() - b.getLineFrom()) as ViewUnifiedChange[];
     }

client/src/app/slides/motions/motion/motion-slide.component.ts

@@ -6,7 +6,7 @@ import { SlideData } from 'app/core/core-services/projector-data.service';
 import { ChangeRecommendationRepositoryService } from 'app/core/repositories/motions/change-recommendation-repository.service';
 import { MotionRepositoryService } from 'app/core/repositories/motions/motion-repository.service';
 import { DiffLinesInParagraph, DiffService, LineRange } from 'app/core/ui-services/diff.service';
-import { LinenumberingService } from 'app/core/ui-services/linenumbering.service';
+import { LineNumberedString, LinenumberingService } from 'app/core/ui-services/linenumbering.service';
 import { ViewUnifiedChange, ViewUnifiedChangeType } from 'app/shared/models/motions/view-unified-change';
 import { MotionTitleInformation } from 'app/site/motions/models/view-motion';
 import { ChangeRecoMode, LineNumberingMode } from 'app/site/motions/motions.constants';
@@ -270,19 +270,18 @@ export class MotionSlideComponent extends BaseMotionSlideComponent<MotionSlideDa
     /**
      * Extracts a renderable HTML string representing the given line number range of this motion
      *
-     * @param {string} motionHtml
+     * @param {LineNumberedString} motionHtml
      * @param {LineRange} lineRange
      * @param {boolean} lineNumbers - weather to add line numbers to the returned HTML string
      * @param {number} lineLength
      */
     public extractMotionLineRange(
-        motionHtml: string,
+        motionHtml: LineNumberedString,
         lineRange: LineRange,
         lineNumbers: boolean,
         lineLength: number
     ): string {
-        const origHtml = this.lineNumbering.insertLineNumbers(motionHtml, this.lineLength, this.highlightedLine);
-        const extracted = this.diff.extractRangeByLineNumbers(origHtml, lineRange.from, lineRange.to);
+        const extracted = this.diff.extractRangeByLineNumbers(motionHtml, lineRange.from, lineRange.to);
         let html =
             extracted.outerContextStart +
             extracted.innerContextStart +
@@ -343,21 +342,22 @@ export class MotionSlideComponent extends BaseMotionSlideComponent<MotionSlideDa
                 const changes = this.getAllTextChangingObjects().filter(change => {
                     return change.showInDiffView();
                 });
+                const motionText = this.lineNumbering.insertLineNumbers(motion.text, this.lineLength);
                 changes.forEach((change: ViewUnifiedChange, idx: number) => {
                     if (idx === 0) {
                         const lineRange = { from: 1, to: change.getLineFrom() };
-                        text += this.extractMotionLineRange(motion.text, lineRange, true, this.lineLength);
+                        text += this.extractMotionLineRange(motionText, lineRange, true, this.lineLength);
                     } else if (changes[idx - 1].getLineTo() < change.getLineFrom()) {
                         const lineRange = {
                             from: changes[idx - 1].getLineTo(),
                             to: change.getLineFrom()
                         };
-                        text += this.extractMotionLineRange(motion.text, lineRange, true, this.lineLength);
+                        text += this.extractMotionLineRange(motionText, lineRange, true, this.lineLength);
                     }
-                    text += this.diff.getChangeDiff(motion.text, change, this.lineLength, this.highlightedLine);
+                    text += this.diff.getChangeDiff(motionText, change, this.lineLength, this.highlightedLine);
                 });
                 text += this.diff.getTextRemainderAfterLastChange(
-                    motion.text,
+                    motionText,
                     changes,
                     this.lineLength,
                     this.highlightedLine
@@ -412,7 +412,7 @@ export class MotionSlideComponent extends BaseMotionSlideComponent<MotionSlideDa
                         return null;
                     }
                     // Hint: can be either DiffLinesInParagraph or null, if no changes are made
-                    return this.diff.getAmendmentParagraphsLinesByMode(
+                    return this.diff.getAmendmentParagraphsLines(
                         paraNo,
                         baseParagraphs[paraNo],
                         newText,