Working with Paragraph Formatting in React DocumentEditor component

24 May 2022 / 5 minutes to read

Document Editor supports various paragraph formatting options such as text alignment, indentation, paragraph spacing, and more.

Indentation

You can modify the left or right indentation of selected paragraphs using the following sample code.

documenteditor.selection.paragraphFormat.leftIndent= 24;
documenteditor.selection.paragraphFormat.rightIndent= 24;

Special indentation

You can define special indent for first line of the paragraph using the following sample code.

documenteditor.selection.paragraphFormat.firstLineIndent= 24;

Increase indent

You can increase the left indent of selected paragraphs by a factor of 36 points using the following sample code.

documenteditor.editor.increaseIndent()

Decrease indent

You can decrease the left indent of selected paragraphs by a factor of 36 points using the following sample code.

documenteditor.editor.decreaseIndent()

Text alignment

You can get or set the text alignment of selected paragraphs using the following sample code.

documenteditor.selection.paragraphFormat.textAlignment= 'Center' | 'Left' | 'Right' | 'Justify';

You can toggle the text alignment of selected paragraphs by specifying a value using the following sample code.

documenteditor.editor.toggleTextAlignment('Center' | 'Left' | 'Right' | 'Justify');

Line spacing and its type

You can define the line spacing and its type for selected paragraphs using the following sample code.

documenteditor.selection.paragraphFormat.lineSpacingType='AtLeast';
documenteditor.selection.paragraphFormat.lineSpacing= 6;

Paragraph spacing

You can define the spacing before or after the paragraph by using the following sample code.

documenteditor.selection.paragraphFormat.beforeSpacing= 24;
documenteditor.selection.paragraphFormat.afterSpacing= 24;

You can also set automatic spacing before and after the paragraph by using the following sample code.

documenteditor.selection.paragraphFormat.spaceBeforeAuto = true;
documenteditor.selection.paragraphFormat.spaceAfterAuto = true;

Note: If auto spacing property is enabled, then value defined in the beforeSpacing and afterSpacing property will not be considered.

Pagination properties

You can enable or disable the following pagination properties for the paragraphs in a Word document.

Widow/Orphan control - whether the first and last lines of the paragraph are to remain on the same page as the rest of the paragraph when paginating the document.
Keep with next - whether the specified paragraph remains on the same page as the paragraph that follows it while paginating the document.
Keep lines together - whether all lines in the specified paragraphs remain on the same page while paginating the document.

The following example code illustrates how to enable or disable these pagination properties for the selected paragraphs.

documenteditor.selection.paragraphFormat.widowControl = false;
documenteditor.selection.paragraphFormat.keepWithNext = true;
documenteditor.selection.paragraphFormat.keepLinesTogether = true;

The following sample demonstrates the paragraph formatting options using a toolbar.

import * as ReactDOM from 'react-dom';
import * as React from 'react';
import {
DocumentEditorComponent, Selection, Editor, EditorHistory, ContextMenu
} from '@syncfusion/ej2-react-documenteditor';
import { ToolbarComponent, ItemDirective } from '@syncfusion/ej2-react-navigations';
import { DropDownButtonComponent, ItemModel } from '@syncfusion/ej2-react-splitbuttons';

//Inject require modules.
DocumentEditorComponent.Inject(Selection, Editor, EditorHistory, ContextMenu);
export class Default extends React.Component<{}, {}> {
public documenteditor: DocumentEditorComponent;
public items: ItemModel[] = [
    {
        text: 'Single',
    },
    {
        text: '1.15',
    },
    {
        text: '1.5',
    },
    {
        text: 'Double',
    },
];

public contentTemplate1() {
    return (<DropDownButtonComponent items={this.items} iconCss="e-de-icon-LineSpacing" selected={this.lineSpacingAction.bind(this)} ></DropDownButtonComponent>);
}
public componentDidMount(): void {
    this.documenteditor.selectionChange = () => {
        setTimeout(() => { this.onSelectionChange(); }, 20);
    };
}

toolbarButtonClick(arg): void {
    switch (arg.item.id) {
        case 'AlignLeft':
            //Toggle the Left alignment for selected or current paragraph
            this.documenteditor.editor.toggleTextAlignment('Left');
            break;
        case 'AlignRight':
            //Toggle the Right alignment for selected or current paragraph
            this.documenteditor.editor.toggleTextAlignment('Right');
            break;
        case 'AlignCenter':
            //Toggle the Center alignment for selected or current paragraph
            this.documenteditor.editor.toggleTextAlignment('Center');
            break;
        case 'Justify':
            //Toggle the Justify alignment for selected or current paragraph
            this.documenteditor.editor.toggleTextAlignment('Justify');
            break;
        case 'IncreaseIndent':
            //Increase the left indent of selected or current paragraph
            this.documenteditor.editor.increaseIndent();
            break;
        case 'DecreaseIndent':
            //Decrease the left indent of selected or current paragraph
            this.documenteditor.editor.decreaseIndent();
            break;
        case 'ClearFormat':
            this.documenteditor.editor.clearFormatting();
            break;
    }
}
//Change the line spacing of selected or current paragraph
lineSpacingAction(args: any): void {
    let text: string = args.item.text;
    switch (text) {
        case 'Single':
            this.documenteditor.selection.paragraphFormat.lineSpacing = 1;
            break;
        case '1.15':
            this.documenteditor.selection.paragraphFormat.lineSpacing = 1.15;
            break;
        case '1.5':
            this.documenteditor.selection.paragraphFormat.lineSpacing = 1.5;
            break;
        case 'Double':
            this.documenteditor.selection.paragraphFormat.lineSpacing = 2;
            break;
    }
    setTimeout((): void => {
        this.documenteditor.focusIn();
    }, 30);
}
// Selection change to retrieve formatting
onSelectionChange(): void {
    if (this.documenteditor.selection) {
        var paragraphFormat = this.documenteditor.selection.paragraphFormat;
        var toggleBtnId = ['AlignLeft', 'AlignCenter', 'AlignRight', 'Justify'];
        //Remove toggle state.
        for (var i = 0; i < toggleBtnId.length; i++) {
            let toggleBtn: HTMLElement = document.getElementById(toggleBtnId[i]);
            toggleBtn.classList.remove('e-btn-toggle');
        }
        //Add toggle state based on selection paragraph format.
        if (paragraphFormat.textAlignment === 'Left') {
            document.getElementById('AlignLeft').classList.add('e-btn-toggle');
        } else if (paragraphFormat.textAlignment === 'Right') {
            document.getElementById('AlignRight').classList.add('e-btn-toggle');
        } else if (paragraphFormat.textAlignment === 'Center') {
            document.getElementById('AlignCenter').classList.add('e-btn-toggle');
        } else {
            document.getElementById('Justify').classList.add('e-btn-toggle');
        }
        // #endregion
    }
}

render() {

    return (
        <div>
            <ToolbarComponent id='toolbar' clicked={this.toolbarButtonClick.bind(this)}>
                <ItemDirective id="AlignLeft" prefixIcon="e-de-ctnr-alignleft e-icons" tooltipText="Align Left" />
                <ItemDirective id="AlignCenter" prefixIcon="e-de-ctnr-aligncenter e-icons" tooltipText="Align Center" />
                <ItemDirective id="AlignRight" prefixIcon="e-de-ctnr-alignright e-icons" tooltipText="Align Right" />
                <ItemDirective id="Justify" prefixIcon="e-de-ctnr-justify e-icons" tooltipText="Justify" />
                <ItemDirective type="Separator" />
                <ItemDirective id="IncreaseIndent" prefixIcon="e-de-ctnr-increaseindent e-icons" tooltipText="Increase Indent" />
                <ItemDirective id="DecreaseIndent" prefixIcon="e-de-ctnr-decreaseindent e-icons" tooltipText="Decrease Indent" />
                <ItemDirective type="Separator" />
                <ItemDirective template={this.contentTemplate1} />
                <ItemDirective id="ClearFormat" prefixIcon="e-de-ctnr-clearall e-icons" tooltipText="Clear Formatting" />
            </ToolbarComponent>

            <DocumentEditorComponent
                id="container"
                ref={scope => {
                    this.documenteditor = scope;
                }}
                isReadOnly={false}
                enableSelection={true}
                enableEditor={true}
                enableEditorHistory={true}
                enableContextMenu={true}
                enableTableDialog={true}
                height={'330px'}
            />
        </div>
    );
}
}
ReactDOM.render(<Default />, document.getElementById('sample'));

import * as ReactDOM from 'react-dom';
import * as React from 'react';
import { DocumentEditorComponent, Selection, Editor, EditorHistory, ContextMenu } from '@syncfusion/ej2-react-documenteditor';
import { ToolbarComponent, ItemDirective } from '@syncfusion/ej2-react-navigations';
import { DropDownButtonComponent } from '@syncfusion/ej2-react-splitbuttons';
//Inject require modules.
DocumentEditorComponent.Inject(Selection, Editor, EditorHistory, ContextMenu);
export class Default extends React.Component {
    constructor() {
        super(...arguments);
        this.items = [
            {
                text: 'Single',
            },
            {
                text: '1.15',
            },
            {
                text: '1.5',
            },
            {
                text: 'Double',
            },
        ];
    }
    contentTemplate1() {
        return (<DropDownButtonComponent items={this.items} iconCss="e-de-icon-LineSpacing" selected={this.lineSpacingAction.bind(this)}></DropDownButtonComponent>);
    }
    componentDidMount() {
        this.documenteditor.selectionChange = () => {
            setTimeout(() => { this.onSelectionChange(); }, 20);
        };
    }
    toolbarButtonClick(arg) {
        switch (arg.item.id) {
            case 'AlignLeft':
                //Toggle the Left alignment for selected or current paragraph
                this.documenteditor.editor.toggleTextAlignment('Left');
                break;
            case 'AlignRight':
                //Toggle the Right alignment for selected or current paragraph
                this.documenteditor.editor.toggleTextAlignment('Right');
                break;
            case 'AlignCenter':
                //Toggle the Center alignment for selected or current paragraph
                this.documenteditor.editor.toggleTextAlignment('Center');
                break;
            case 'Justify':
                //Toggle the Justify alignment for selected or current paragraph
                this.documenteditor.editor.toggleTextAlignment('Justify');
                break;
            case 'IncreaseIndent':
                //Increase the left indent of selected or current paragraph
                this.documenteditor.editor.increaseIndent();
                break;
            case 'DecreaseIndent':
                //Decrease the left indent of selected or current paragraph
                this.documenteditor.editor.decreaseIndent();
                break;
            case 'ClearFormat':
                this.documenteditor.editor.clearFormatting();
                break;
        }
    }
    //Change the line spacing of selected or current paragraph
    lineSpacingAction(args) {
        let text = args.item.text;
        switch (text) {
            case 'Single':
                this.documenteditor.selection.paragraphFormat.lineSpacing = 1;
                break;
            case '1.15':
                this.documenteditor.selection.paragraphFormat.lineSpacing = 1.15;
                break;
            case '1.5':
                this.documenteditor.selection.paragraphFormat.lineSpacing = 1.5;
                break;
            case 'Double':
                this.documenteditor.selection.paragraphFormat.lineSpacing = 2;
                break;
        }
        setTimeout(() => {
            this.documenteditor.focusIn();
        }, 30);
    }
    // Selection change to retrieve formatting
    onSelectionChange() {
        if (this.documenteditor.selection) {
            var paragraphFormat = this.documenteditor.selection.paragraphFormat;
            var toggleBtnId = ['AlignLeft', 'AlignCenter', 'AlignRight', 'Justify'];
            //Remove toggle state.
            for (var i = 0; i < toggleBtnId.length; i++) {
                let toggleBtn = document.getElementById(toggleBtnId[i]);
                toggleBtn.classList.remove('e-btn-toggle');
            }
            //Add toggle state based on selection paragraph format.
            if (paragraphFormat.textAlignment === 'Left') {
                document.getElementById('AlignLeft').classList.add('e-btn-toggle');
            }
            else if (paragraphFormat.textAlignment === 'Right') {
                document.getElementById('AlignRight').classList.add('e-btn-toggle');
            }
            else if (paragraphFormat.textAlignment === 'Center') {
                document.getElementById('AlignCenter').classList.add('e-btn-toggle');
            }
            else {
                document.getElementById('Justify').classList.add('e-btn-toggle');
            }
            // #endregion
        }
    }
    render() {
        return (<div>
            <ToolbarComponent id='toolbar' clicked={this.toolbarButtonClick.bind(this)}>
                <ItemDirective id="AlignLeft" prefixIcon="e-de-ctnr-alignleft e-icons" tooltipText="Align Left"/>
                <ItemDirective id="AlignCenter" prefixIcon="e-de-ctnr-aligncenter e-icons" tooltipText="Align Center"/>
                <ItemDirective id="AlignRight" prefixIcon="e-de-ctnr-alignright e-icons" tooltipText="Align Right"/>
                <ItemDirective id="Justify" prefixIcon="e-de-ctnr-justify e-icons" tooltipText="Justify"/>
                <ItemDirective type="Separator"/>
                <ItemDirective id="IncreaseIndent" prefixIcon="e-de-ctnr-increaseindent e-icons" tooltipText="Increase Indent"/>
                <ItemDirective id="DecreaseIndent" prefixIcon="e-de-ctnr-decreaseindent e-icons" tooltipText="Decrease Indent"/>
                <ItemDirective type="Separator"/>
                <ItemDirective template={this.contentTemplate1}/>
                <ItemDirective id="ClearFormat" prefixIcon="e-de-ctnr-clearall e-icons" tooltipText="Clear Formatting"/>
            </ToolbarComponent>

            <DocumentEditorComponent id="container" ref={scope => {
            this.documenteditor = scope;
        }} isReadOnly={false} enableSelection={true} enableEditor={true} enableEditorHistory={true} enableContextMenu={true} enableTableDialog={true} height={'330px'}/>
        </div>);
    }
}
ReactDOM.render(<Default />, document.getElementById('sample'));