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import type {
ContentModelBlockFormat,
ContentModelCode,
ContentModelFormatBase,
ContentModelLink,
ContentModelParagraphDecorator,
ContentModelSegmentFormat,
DomToModelContext,
} from 'roosterjs-content-model-types';
/**
* @internal
*/
export interface StackFormatOptions {
segment?: 'shallowClone' | 'shallowCloneForBlock' | 'empty';
paragraph?: 'shallowClone' | 'shallowCloneForGroup' | 'empty';
blockDecorator?: 'empty';
link?: 'linkDefault' | 'cloneFormat' | 'empty';
code?: 'codeDefault' | 'empty';
}
// Some styles, such as background color, won't be inherited by block element if it was originally
// declared from an inline element. So we need to skip them.
// e.g.
// <span style="background-color: red">
// line 1 <---------------------------- in red here
// <div>line 2</div> <---------------------- not in red here
// </span>
const SkippedStylesForBlockOnSegmentOnSegment: (keyof ContentModelSegmentFormat)[] = [
'backgroundColor',
];
const SkippedStylesForTable: (keyof ContentModelBlockFormat)[] = [
'marginLeft',
'marginRight',
'paddingLeft',
'paddingRight',
];
/**
* @internal
*/
export function stackFormat(
context: DomToModelContext,
options: StackFormatOptions,
callback: () => void
) {
const {
segmentFormat,
blockFormat,
link: linkFormat,
code: codeFormat,
blockDecorator: decoratorFormat,
} = context;
const { segment, paragraph, link, code, blockDecorator } = options;
try {
context.segmentFormat = stackFormatInternal(segmentFormat, segment);
context.blockFormat = stackFormatInternal(blockFormat, paragraph);
context.link = stackLinkInternal(linkFormat, link);
context.code = stackCodeInternal(codeFormat, code);
context.blockDecorator = stackDecoratorInternal(decoratorFormat, blockDecorator);
callback();
} finally {
context.segmentFormat = segmentFormat;
context.blockFormat = blockFormat;
context.link = linkFormat;
context.code = codeFormat;
context.blockDecorator = decoratorFormat;
}
}
function stackLinkInternal(
linkFormat: ContentModelLink,
link?: 'linkDefault' | 'cloneFormat' | 'empty'
) {
switch (link) {
case 'linkDefault':
return {
format: {
underline: true,
},
dataset: {},
};
case 'empty':
return {
format: {},
dataset: {},
};
case 'cloneFormat':
default:
return {
dataset: linkFormat.dataset,
format: { ...linkFormat.format },
};
}
}
function stackCodeInternal(codeFormat: ContentModelCode, code?: 'codeDefault' | 'empty') {
switch (code) {
case 'codeDefault':
return {
format: {
fontFamily: 'monospace',
},
};
case 'empty':
return {
format: {},
};
default:
return codeFormat;
}
}
function stackDecoratorInternal(
format: ContentModelParagraphDecorator,
decorator?: 'decoratorDefault' | 'empty'
) {
switch (decorator) {
case 'empty':
return {
format: {},
tagName: '',
};
default:
return format;
}
}
function stackFormatInternal<T extends ContentModelFormatBase>(
format: T,
processType?: 'shallowClone' | 'shallowCloneForBlock' | 'shallowCloneForGroup' | 'empty'
): T | {} {
switch (processType) {
case 'empty':
return {};
case undefined:
return format;
default:
const result = { ...format };
getObjectKeys(format).forEach(key => {
if (
(processType == 'shallowCloneForBlock' &&
SkippedStylesForBlockOnSegmentOnSegment.indexOf(
key as keyof ContentModelSegmentFormat
) >= 0) ||
(processType == 'shallowCloneForGroup' &&
SkippedStylesForTable.indexOf(key as keyof ContentModelBlockFormat) >= 0)
) {
delete result[key];
}
});
if (processType == 'shallowClone' || processType == 'shallowCloneForGroup') {
const blockFormat = format as ContentModelBlockFormat;
// For a new paragraph, if current text indent is already applied to previous block in the same level,
// we need to ignore it according to browser rendering behavior
if (blockFormat.textIndent) {
delete (result as ContentModelBlockFormat).isTextIndentApplied;
blockFormat.isTextIndentApplied = true;
}
}
return result;
}
}
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