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import { getClosestAncestorBlockGroupIndex } from './getClosestAncestorBlockGroupIndex';
import { getImageMetadata } from '../metadata/updateImageMetadata';
import { getTableMetadata } from '../metadata/updateTableMetadata';
import { isBold } from '../../domUtils/style/isBold';
import { iterateSelections } from '../selection/iterateSelections';
import { parseValueWithUnit } from '../../formatHandlers/utils/parseValueWithUnit';
import type {
ConflictFormatSolution,
ContentModelFormatState,
ContentModelSegmentFormat,
ReadonlyContentModelBlockGroup,
ReadonlyContentModelBlock,
ReadonlyContentModelImage,
ReadonlyTableSelectionContext,
ReadonlyContentModelParagraph,
ReadonlyContentModelFormatContainer,
ReadonlyContentModelListItem,
ReadonlyContentModelDocument,
DOMHelper,
DarkColorHandler,
} from 'roosterjs-content-model-types';
/**
* Retrieve format state from the given Content Model
* @param model The Content Model to retrieve format state from
* @param pendingFormat Existing pending format, if any
* @param formatState Existing format state object, used for receiving the result
* @param conflictSolution The strategy for handling format conflicts
* @param domHelper Optional DOMHelper to retrieve container format
* @param isInDarkMode Optional flag to indicate if the environment is in dark mode
* @param colorHandler Optional DarkColorHandler to handle dark mode colors
*
*/
export function retrieveModelFormatState(
model: ReadonlyContentModelDocument,
pendingFormat: ContentModelSegmentFormat | null,
formatState: ContentModelFormatState,
conflictSolution: ConflictFormatSolution = 'remove',
domHelper?: DOMHelper,
isInDarkMode?: boolean,
colorHandler?: DarkColorHandler
) {
let firstTableContext: ReadonlyTableSelectionContext | undefined;
let firstBlock: ReadonlyContentModelBlock | undefined;
let isFirst = true;
let isFirstImage = true;
let isFirstSegment = true;
let containerFormat: ContentModelSegmentFormat | undefined = undefined;
const modelFormat = { ...model.format };
delete modelFormat.italic;
delete modelFormat.underline;
delete modelFormat.fontWeight;
iterateSelections(
model,
(path, tableContext, block, segments) => {
// Structure formats
retrieveStructureFormat(formatState, path, isFirst, conflictSolution);
// Multiple line format
if (block) {
if (firstBlock) {
formatState.isMultilineSelection = true;
} else {
firstBlock = block;
}
}
if (block?.blockType == 'Paragraph') {
// Paragraph formats
retrieveParagraphFormat(formatState, block, isFirst, conflictSolution);
// Segment formats
segments?.forEach(segment => {
if (isFirstSegment || segment.segmentType != 'SelectionMarker') {
let currentFormat = Object.assign(
{},
block.format,
block.decorator?.format,
segment.format,
segment.code?.format,
segment.link?.format,
pendingFormat
);
// Sometimes the content may not specify all required format but just leverage the container format to do so.
// In this case, we need to merge the container format into the current format
// to make sure the current format contains all required format.
if (!hasAllRequiredFormat(currentFormat)) {
if (!containerFormat) {
containerFormat =
domHelper?.getContainerFormat(isInDarkMode, colorHandler) ??
modelFormat;
}
currentFormat = Object.assign({}, containerFormat, currentFormat);
}
retrieveSegmentFormat(
formatState,
isFirst,
currentFormat,
conflictSolution
);
mergeValue(
formatState,
'isCodeInline',
!!segment?.code,
isFirst,
conflictSolution
);
}
// We only care the format of selection marker when it is the first selected segment. This is because when selection marker
// is after some other selected segments, it mostly like appears at the beginning of a seconde line when the whole first line
// is selected (e.g. triple-click on a line) then the second selection marker doesn't contain a correct format, so we need to
// ignore it
isFirstSegment = false;
formatState.canUnlink = formatState.canUnlink || !!segment.link;
formatState.canAddImageAltText =
formatState.canAddImageAltText ||
segments.some(segment => segment.segmentType == 'Image');
isFirst = false;
if (segment.segmentType === 'Image') {
if (isFirstImage) {
retrieveImageFormat(segment, formatState);
isFirstImage = false;
} else {
formatState.imageFormat = undefined;
formatState.imageEditingMetadata = undefined;
}
}
});
isFirst = false;
}
if (tableContext) {
if (firstTableContext) {
const { table, colIndex, rowIndex } = firstTableContext;
// Merge table format
if (
tableContext.table == table &&
(tableContext.colIndex != colIndex || tableContext.rowIndex != rowIndex)
) {
formatState.canMergeTableCell = true;
formatState.isMultilineSelection = true;
}
} else {
// Table formats
retrieveTableFormat(tableContext, formatState);
firstTableContext = tableContext;
}
}
},
{
includeListFormatHolder: 'never',
}
);
if (formatState.fontSize) {
formatState.fontSize = px2Pt(formatState.fontSize);
}
}
function retrieveSegmentFormat(
result: ContentModelFormatState,
isFirst: boolean,
mergedFormat: ContentModelSegmentFormat,
IconflictSolution: ConflictFormatSolution = 'remove'
) {
const superOrSubscript = mergedFormat.superOrSubScriptSequence?.split(' ')?.pop();
mergeValue(result, 'isBold', isBold(mergedFormat.fontWeight), isFirst, conflictSolution);
mergeValue(result, 'isItalic', mergedFormat.italic, isFirst, conflictSolution);
mergeValue(result, 'isUnderline', mergedFormat.underline, isFirst, conflictSolution);
mergeValue(result, 'isStrikeThrough', mergedFormat.strikethrough, isFirst, conflictSolution);
mergeValue(result, 'isSuperscript', superOrSubscript == 'super', isFirst, conflictSolution);
mergeValue(result, 'isSubscript', superOrSubscript == 'sub', isFirst, conflictSolution);
mergeValue(result, 'letterSpacing', mergedFormat.letterSpacing, isFirst, conflictSolution);
mergeValue(result, 'fontName', mergedFormat.fontFamily, isFirst, conflictSolution);
mergeValue(
result,
'fontSize',
mergedFormat.fontSize,
isFirst,
conflictSolution,
val => parseValueWithUnit(val, undefined, 'pt') + 'pt'
);
mergeValue(result, 'backgroundColor', mergedFormat.backgroundColor, isFirst, conflictSolution);
mergeValue(result, 'textColor', mergedFormat.textColor, isFirst, conflictSolution);
mergeValue(result, 'fontWeight', mergedFormat.fontWeight, isFirst, conflictSolution);
mergeValue(result, 'lineHeight', mergedFormat.lineHeight, isFirst, conflictSolution);
}
function retrieveParagraphFormat(
result: ContentModelFormatState,
paragraph: ReadonlyContentModelParagraph,
isFirst: boolean,
IconflictSolution: ConflictFormatSolution = 'remove'
) {
const headingLevel = parseInt((paragraph.decorator?.tagName || '').substring(1));
const validHeadingLevel = headingLevel >= 1 && headingLevel <= 6 ? headingLevel : undefined;
mergeValue(result, 'marginBottom', paragraph.format.marginBottom, isFirst, conflictSolution);
mergeValue(result, 'marginTop', paragraph.format.marginTop, isFirst, conflictSolution);
mergeValue(result, 'headingLevel', validHeadingLevel, isFirst, conflictSolution);
mergeValue(result, 'textAlign', paragraph.format.textAlign, isFirst, conflictSolution);
mergeValue(result, 'direction', paragraph.format.direction, isFirst, conflictSolution);
}
function retrieveStructureFormat(
result: ContentModelFormatState,
path: ReadonlyContentModelBlockGroup[],
isFirst: boolean,
IconflictSolution: ConflictFormatSolution = 'remove'
) {
const listItemIndex = getClosestAncestorBlockGroupIndex(path, ['ListItem'], []);
const containerIndex = getClosestAncestorBlockGroupIndex(path, ['FormatContainer'], []);
if (listItemIndex >= 0) {
const listItem = path[listItemIndex] as ReadonlyContentModelListItem;
const listType = listItem?.levels[listItem.levels.length - 1]?.listType;
mergeValue(result, 'isBullet', listType == 'UL', isFirst, conflictSolution);
mergeValue(result, 'isNumbering', listType == 'OL', isFirst, conflictSolution);
}
mergeValue(
result,
'isBlockQuote',
containerIndex >= 0 &&
(path[containerIndex] as ReadonlyContentModelFormatContainer)?.tagName == 'blockquote',
isFirst,
conflictSolution
);
}
function retrieveTableFormat(
tableContext: ReadonlyTableSelectionContext,
result: ContentModelFormatState
) {
const tableFormat = getTableMetadata(tableContext.table);
result.isInTable = true;
result.tableHasHeader = tableContext.table.rows.some(row =>
row.cells.some(cell => cell.isHeader)
);
if (tableFormat) {
result.tableFormat = tableFormat;
}
}
function retrieveImageFormat(image: ReadonlyContentModelImage, result: ContentModelFormatState) {
const { format } = image;
const borderKey = 'borderTop';
const extractedBorder = extractBorderValues(format[borderKey]);
const borderColor = extractedBorder.color;
const borderWidth = extractedBorder.width;
const borderStyle = extractedBorder.style;
result.imageFormat = {
borderColor,
borderWidth,
borderStyle,
boxShadow: format.boxShadow,
borderRadius: format.borderRadius,
};
result.imageEditingMetadata = getImageMetadata(image);
}
function mergeValue<K extends keyof ContentModelFormatState>(
format: ContentModelFormatState,
key: K,
newValue: ContentModelFormatState[K] | undefined,
isFirst: boolean,
IconflictSolution: ConflictFormatSolution = 'remove',
parseFn: (val: ContentModelFormatState[K]) => ContentModelFormatState[K] = val => val
) {
if (isFirst) {
if (newValue !== undefined) {
format[key] = newValue;
}
} else if (parseFn(newValue) !== parseFn(format[key])) {
switch (conflictSolution) {
case 'remove':
delete format[key];
break;
case 'keepFirst':
break;
case 'returnMultiple':
if (typeof format[key] === 'string') {
(format[key] as string) = 'Multiple';
} else {
delete format[key];
}
break;
}
}
}
function px2Pt(px: string) {
Eif (px) {
const index = px.indexOf('px');
if (index !== -1 && index === px.length - 2) {
// Edge may not handle the floating computing well which causes the calculated value to be a little less than the actual value
// So add 0.05 to fix it
return Math.round(parseFloat(px) * 75 + 0.05) / 100 + 'pt';
}
}
return px;
}
function hasAllRequiredFormat(format: ContentModelSegmentFormat) {
return !!format.fontFamily && !!format.fontSize && !!format.textColor;
}
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