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import { createListLevel, parseFormat } from 'roosterjs-content-model-dom';
import { setProcessor } from '../utils/setProcessor';
import {
COMMENT_HIGHLIGHT_CLASS,
COMMENT_HIGHLIGHT_CLICKED_CLASS,
LIST_CONTAINER_ELEMENT_CLASS_NAME,
REMOVE_MARGIN_ELEMENTS,
TEMP_ELEMENTS_CLASSES,
} from './constants';
import type {
BeforePasteEvent,
ContentModelBlockFormat,
ContentModelBlockGroup,
ContentModelListItemLevelFormat,
ContentModelListLevel,
ContentModelSegmentFormat,
DomToModelContext,
DomToModelListFormat,
ElementProcessor,
FormatParser,
} from 'roosterjs-content-model-types';
const LIST_ELEMENT_TAGS = ['UL', 'OL', 'LI'];
const LIST_ELEMENT_SELECTOR = LIST_ELEMENT_TAGS.join(',');
const END_OF_PARAGRAPH = 'EOP';
const SELECTED_CLASS = 'Selected';
const BASE_PADDING_WAC_LISTS = '1em';
interface WacContext extends DomToModelListFormat {
/**
* Current list levels
*/
currentListLevels?: ContentModelListLevel[];
/**
* Array to keep the start of the lists and determine if the start override should be set.
*/
listItemThread?: number[];
}
/**
* Wac components do not use sub and super tags, instead only add vertical align to a span.
* This parser normalize the content for content model
*/
const wacSubSuperParser: FormatParser<ContentModelSegmentFormat> = (
format: ContentModelSegmentFormat,
element: HTMLElement
): void => {
const verticalAlign = element.style.verticalAlign;
Iif (verticalAlign === 'super') {
format.superOrSubScriptSequence = 'super';
}
Iif (verticalAlign === 'sub') {
format.superOrSubScriptSequence = 'sub';
}
};
/**
* This processor does:
* 1) Remove the display and margin of the element.
* 2) When an element should be ignored but should handle the child elements call the default child processor.
* 3) Removes the End of Paragraph element to avoid empty lines, we should only remove this if the previous element of the EOP is an EmptyTextRun
* 4) Finally call the default processor.
* @returns
*/
const wacElementProcessor: ElementProcessor<HTMLElement> = (
group: ContentModelBlockGroup,
element: HTMLElement,
context: DomToModelContext
): void => {
const elementTag = element.tagName;
if (element.matches(REMOVE_MARGIN_ELEMENTS)) {
element.style.removeProperty('display');
element.style.removeProperty('margin');
}
if (element.classList.contains(LIST_CONTAINER_ELEMENT_CLASS_NAME)) {
context.elementProcessors.child(group, element, context);
return;
}
if (
TEMP_ELEMENTS_CLASSES.some(className => element.classList.contains(className)) ||
// This is needed to remove some temporary End of paragraph elements that WAC sometimes preserves
(element.classList.contains(SELECTED_CLASS) && element.classList.contains(END_OF_PARAGRAPH))
) {
return;
} else Iif (shouldClearListContext(elementTag, element, context)) {
const { listFormat } = context;
listFormat.levels = [];
listFormat.listParent = undefined;
}
context.defaultElementProcessors.element(group, element, context);
};
/**
* This processor calls the default list processor and then sets the correct list level and list bullet.
*/
const wacLiElementProcessor: ElementProcessor<HTMLLIElement> = (
group: ContentModelBlockGroup,
element: HTMLLIElement,
context: DomToModelContext
): void => {
const level = parseInt(element.getAttribute('data-aria-level') ?? '');
const listFormat = context.listFormat as WacContext;
const listType =
listFormat.levels[context.listFormat.levels.length - 1]?.listType ||
(element.closest('ol,ul')?.tagName.toUpperCase() as 'UL' | 'OL');
const newLevel: ContentModelListLevel = createListLevel(listType, context.blockFormat);
parseFormat(element, context.formatParsers.listLevelThread, newLevel.format, context);
parseFormat(element, context.formatParsers.listLevel, newLevel.format, context);
context.listFormat.levels = listFormat.currentListLevels || context.listFormat.levels;
if (level > 0) {
if (level > context.listFormat.levels.length) {
while (level != context.listFormat.levels.length) {
context.listFormat.levels.push(newLevel);
}
} else {
context.listFormat.levels.splice(level, context.listFormat.levels.length - 1);
context.listFormat.levels[level - 1] = newLevel;
}
}
context.defaultElementProcessors.li?.(group, element, context);
const listParent = listFormat.listParent;
if (listParent) {
const lastblock = listParent.blocks[listParent.blocks.length - 1];
Eif (lastblock.blockType == 'BlockGroup' && lastblock.blockGroupType == 'ListItem') {
const currentLevel = lastblock.levels[lastblock.levels.length - 1];
updateStartOverride(currentLevel, element, context);
}
}
const newLevels: ContentModelListLevel[] = [];
listFormat.levels.forEach(v => {
const newValue: ContentModelListLevel = {
dataset: { ...v.dataset },
format: { ...v.format },
listType: v.listType,
};
newLevels.push(newValue);
});
listFormat.currentListLevels = newLevels;
listFormat.levels = [];
};
/**
* This parsers does:
* 1) Sets the display for dummy item to undefined when the current style is block.
* 2) Removes the Margin Left
*/
const wacListItemParser: FormatParser<ContentModelListItemLevelFormat> = (
format: ContentModelListItemLevelFormat,
element: HTMLElement
): void => {
if (element.style.display === 'block') {
format.displayForDummyItem = undefined;
}
};
/**
* Wac usually adds padding to lists which is unwanted so remove it.
*/
const wacListLevelParser: FormatParser<ContentModelListItemLevelFormat> = (
format: ContentModelListItemLevelFormat
): void => {
format.marginLeft = undefined;
format.paddingLeft = BASE_PADDING_WAC_LISTS;
};
/**
* This function returns whether we need to clear the list format.
* Word Online wraps lists inside divs to have this structure:
*
* <div class='ListContainerWrapper'>
* <ol>...</ol>
* </div>
* <div>
* <p>...</p>
* <div>
* <div class='ListContainerWrapper'>
* <ol>...</ol>
* </div>
*
* So if a elements is not contained inside of a list we should clear the list context to prevent normal text to be
* transformed into list
* For the above scenario, if we do not clear the format, the content inside of the second div would be transformed to a list too.
*/
function shouldClearListContext(
elementTag: string,
element: HTMLElement,
context: DomToModelContext
) {
return (
context.listFormat.levels.length > 0 &&
LIST_ELEMENT_TAGS.every(tag => tag != elementTag) &&
!element.closest(LIST_ELEMENT_SELECTOR)
);
}
const wacCommentParser: FormatParser<ContentModelSegmentFormat> = (
format: ContentModelSegmentFormat,
element: HTMLElement
): void => {
if (
element.className.includes(COMMENT_HIGHLIGHT_CLASS) ||
element.className.includes(COMMENT_HIGHLIGHT_CLICKED_CLASS)
) {
delete format.backgroundColor;
}
};
/**
* @internal
* Convert pasted content from Office Online
* Once it is known that the document is from WAC
* We need to remove the display property and margin from all the list item
* @param ev BeforePasteEvent
*/
export function processPastedContentWacComponents(ev: BeforePasteEvent) {
addParser(ev.domToModelOption, 'segment', wacSubSuperParser);
addParser(ev.domToModelOption, 'listItemThread', wacListItemParser);
addParser(ev.domToModelOption, 'listItemElement', wacListItemParser);
addParser(ev.domToModelOption, 'listLevel', wacListLevelParser);
addParser(ev.domToModelOption, 'container', wacContainerParser);
addParser(ev.domToModelOption, 'table', wacContainerParser);
addParser(ev.domToModelOption, 'segment', wacCommentParser);
setProcessor(ev.domToModelOption, 'element', wacElementProcessor);
setProcessor(ev.domToModelOption, 'li', wacLiElementProcessor);
}
const wacContainerParser: FormatParser<ContentModelBlockFormat> = (
format: ContentModelBlockFormat,
element: HTMLElement
) => {
if (element.style.marginLeft.startsWith('-')) {
delete format.marginLeft;
}
};
function updateStartOverride(
currentLevel: ContentModelListLevel | undefined,
element: HTMLLIElement,
ctx: DomToModelContext
) {
if (!currentLevel || currentLevel.listType == 'UL') {
return;
}
const list = element.closest('ol');
const listFormat = ctx.listFormat as WacContext;
const [start, listLevel] = extractWordListMetadata(list, element);
if (!listFormat.listItemThread) {
listFormat.listItemThread = [];
}
const thread: number | undefined = listFormat.listItemThread[listLevel];
if (thread && start - thread != 1) {
currentLevel.format.startNumberOverride = start;
}
listFormat.listItemThread[listLevel] = start;
}
function extractWordListMetadata(
list: HTMLElement | null | undefined,
item: HTMLElement | null | undefined
) {
const itemIndex =
item && Array.from(list?.querySelectorAll('li') || []).indexOf(item as HTMLLIElement);
const start =
parseInt(list?.getAttribute('start') || '1') + (itemIndex && itemIndex > 0 ? itemIndex : 0);
const listLevel = parseInt(item?.getAttribute('data-aria-level') || '');
return [start, listLevel];
}
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