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import type {
ContentModelSegmentFormat,
DarkColorHandler,
DOMHelper,
} from 'roosterjs-content-model-types';
class DOMHelperImpl implements DOMHelper {
constructor(private contentDiv: HTMLElement) {}
queryElements(selector: string): HTMLElement[] {
return toArray(this.contentDiv.querySelectorAll(selector)) as HTMLElement[];
}
getTextContent(): string {
return this.contentDiv.textContent || '';
}
isNodeInEditor(node: Node, excludeRoot?: boolean): boolean {
return excludeRoot && node == this.contentDiv ? false : this.contentDiv.contains(node);
}
calculateZoomScale(): number {
const originalWidth = this.contentDiv.getBoundingClientRect()?.width || 0;
const visualWidth = this.contentDiv.offsetWidth;
return visualWidth > 0 && originalWidth > 0
? Math.round((originalWidth / visualWidth) * 100) / 100
: 1;
}
setDomAttribute(name: string, value: string | null) {
if (value === null) {
this.contentDiv.removeAttribute(name);
} else {
this.contentDiv.setAttribute(name, value);
}
}
getDomAttribute(name: string): string | null {
return this.contentDiv.getAttribute(name);
}
getDomStyle<T extends keyof CSSStyleDeclaration>(style: T): CSSStyleDeclaration[T] {
return this.contentDiv.style[style];
}
findClosestElementAncestor(startFrom: Node, selector?: string): HTMLElement | null {
const startElement = isNodeOfType(startFrom, 'ELEMENT_NODE')
? startFrom
: startFrom.parentElement;
const closestElement = selector
? (startElement?.closest(selector) as HTMLElement | null)
: startElement;
return closestElement &&
this.isNodeInEditor(closestElement) &&
closestElement != this.contentDiv
? closestElement
: null;
}
hasFocus(): boolean {
const activeElement = this.contentDiv.ownerDocument.activeElement;
return !!(activeElement && this.contentDiv.contains(activeElement));
}
/**
* Check if the root element is in RTL mode
*/
isRightToLeft(): boolean {
const contentDiv = this.contentDiv;
const style = contentDiv.ownerDocument.defaultView?.getComputedStyle(contentDiv);
return style?.direction == 'rtl';
}
/**
* Get the width of the editable area of the editor content div
*/
getClientWidth(): number {
const contentDiv = this.contentDiv;
const style = contentDiv.ownerDocument.defaultView?.getComputedStyle(contentDiv);
const paddingLeft = parseValueWithUnit(style?.paddingLeft);
const paddingRight = parseValueWithUnit(style?.paddingRight);
return this.contentDiv.clientWidth - (paddingLeft + paddingRight);
}
/**
* Get a deep cloned root element
*/
getClonedRoot(): HTMLElement {
return this.contentDiv.cloneNode(true /*deep*/) as HTMLElement;
}
/**
* Get format of the container element
* @param isInDarkMode Optional flag to indicate if the environment is in dark mode
* @param darkColorHandler Optional DarkColorHandler to retrieve dark mode colors
*/
getContainerFormat(
isInDarkMode?: boolean,
darkColorHandler?: DarkColorHandler
): ContentModelSegmentFormat {
const window = this.contentDiv.ownerDocument.defaultView;
const style = window?.getComputedStyle(this.contentDiv);
return style
? {
fontSize: style.fontSize,
fontFamily: style.fontFamily,
fontWeight: style.fontWeight,
textColor: getColor(
this.contentDiv,
false /*isBackgroundColor*/,
!!isInDarkMode,
darkColorHandler,
style.color
),
backgroundColor: getColor(
this.contentDiv,
true /*isBackgroundColor*/,
!!isInDarkMode,
darkColorHandler,
style.backgroundColor
),
italic: style.fontStyle == 'italic',
letterSpacing: style.letterSpacing,
lineHeight: style.lineHeight,
strikethrough: style.textDecoration?.includes('line-through'),
superOrSubScriptSequence: style.verticalAlign,
underline: style.textDecoration?.includes('underline'),
}
: {};
}
}
/**
* @internal Create new instance of DOMHelper
*/
export function createDOMHelper(contentDiv: HTMLElement): DOMHelper {
return new DOMHelperImpl(contentDiv);
}
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