301 lines
11 KiB
JavaScript
301 lines
11 KiB
JavaScript
import React from 'react';
|
|
import {
|
|
Editor,
|
|
EditorState,
|
|
Modifier,
|
|
ContentState,
|
|
ContentBlock,
|
|
convertFromHTML,
|
|
DefaultDraftBlockRenderMap,
|
|
DefaultDraftInlineStyle,
|
|
CompositeDecorator,
|
|
SelectionState,
|
|
Entity,
|
|
} from 'draft-js';
|
|
import * as sdk from './index';
|
|
import * as emojione from 'emojione';
|
|
import {stateToHTML} from 'draft-js-export-html';
|
|
import {SelectionRange} from "./autocomplete/Autocompleter";
|
|
import {stateToMarkdown as __stateToMarkdown} from 'draft-js-export-markdown';
|
|
|
|
const MARKDOWN_REGEX = {
|
|
LINK: /(?:\[([^\]]+)\]\(([^\)]+)\))|\<(\w+:\/\/[^\>]+)\>/g,
|
|
ITALIC: /([\*_])([\w\s]+?)\1/g,
|
|
BOLD: /([\*_])\1([\w\s]+?)\1\1/g,
|
|
HR: /(\n|^)((-|\*|_) *){3,}(\n|$)/g,
|
|
CODE: /`[^`]*`/g,
|
|
STRIKETHROUGH: /~{2}[^~]*~{2}/g,
|
|
};
|
|
|
|
const USERNAME_REGEX = /@\S+:\S+/g;
|
|
const ROOM_REGEX = /#\S+:\S+/g;
|
|
const EMOJI_REGEX = new RegExp(emojione.unicodeRegexp, 'g');
|
|
|
|
const ZWS_CODE = 8203;
|
|
const ZWS = String.fromCharCode(ZWS_CODE); // zero width space
|
|
export function stateToMarkdown(state) {
|
|
return __stateToMarkdown(state)
|
|
.replace(
|
|
ZWS, // draft-js-export-markdown adds these
|
|
''); // this is *not* a zero width space, trust me :)
|
|
}
|
|
|
|
export const contentStateToHTML = (contentState: ContentState) => {
|
|
return stateToHTML(contentState, {
|
|
inlineStyles: {
|
|
UNDERLINE: {
|
|
element: 'u'
|
|
}
|
|
}
|
|
});
|
|
};
|
|
|
|
export function htmlToContentState(html: string): ContentState {
|
|
const blockArray = convertFromHTML(html).contentBlocks;
|
|
return ContentState.createFromBlockArray(blockArray);
|
|
}
|
|
|
|
function unicodeToEmojiUri(str) {
|
|
let replaceWith, unicode, alt;
|
|
if ((!emojione.unicodeAlt) || (emojione.sprites)) {
|
|
// if we are using the shortname as the alt tag then we need a reversed array to map unicode code point to shortnames
|
|
let mappedUnicode = emojione.mapUnicodeToShort();
|
|
}
|
|
|
|
str = str.replace(emojione.regUnicode, function(unicodeChar) {
|
|
if ( (typeof unicodeChar === 'undefined') || (unicodeChar === '') || (!(unicodeChar in emojione.jsEscapeMap)) ) {
|
|
// if the unicodeChar doesnt exist just return the entire match
|
|
return unicodeChar;
|
|
} else {
|
|
// get the unicode codepoint from the actual char
|
|
unicode = emojione.jsEscapeMap[unicodeChar];
|
|
return emojione.imagePathSVG+unicode+'.svg'+emojione.cacheBustParam;
|
|
}
|
|
});
|
|
|
|
return str;
|
|
}
|
|
|
|
/**
|
|
* Utility function that looks for regex matches within a ContentBlock and invokes {callback} with (start, end)
|
|
* From https://facebook.github.io/draft-js/docs/advanced-topics-decorators.html
|
|
*/
|
|
function findWithRegex(regex, contentBlock: ContentBlock, callback: (start: number, end: number) => any) {
|
|
const text = contentBlock.getText();
|
|
let matchArr, start;
|
|
while ((matchArr = regex.exec(text)) !== null) {
|
|
start = matchArr.index;
|
|
callback(start, start + matchArr[0].length);
|
|
}
|
|
}
|
|
|
|
// Workaround for https://github.com/facebook/draft-js/issues/414
|
|
let emojiDecorator = {
|
|
strategy: (contentState, contentBlock, callback) => {
|
|
findWithRegex(EMOJI_REGEX, contentBlock, callback);
|
|
},
|
|
component: (props) => {
|
|
let uri = unicodeToEmojiUri(props.children[0].props.text);
|
|
let shortname = emojione.toShort(props.children[0].props.text);
|
|
let style = {
|
|
display: 'inline-block',
|
|
width: '1em',
|
|
maxHeight: '1em',
|
|
background: `url(${uri})`,
|
|
backgroundSize: 'contain',
|
|
backgroundPosition: 'center center',
|
|
overflow: 'hidden',
|
|
};
|
|
return (<span title={shortname} style={style}><span style={{opacity: 0}}>{props.children}</span></span>);
|
|
},
|
|
};
|
|
|
|
/**
|
|
* Returns a composite decorator which has access to provided scope.
|
|
*/
|
|
export function getScopedRTDecorators(scope: any): CompositeDecorator {
|
|
return [emojiDecorator];
|
|
}
|
|
|
|
export function getScopedMDDecorators(scope: any): CompositeDecorator {
|
|
let markdownDecorators = ['HR', 'BOLD', 'ITALIC', 'CODE', 'STRIKETHROUGH'].map(
|
|
(style) => ({
|
|
strategy: (contentState, contentBlock, callback) => {
|
|
return findWithRegex(MARKDOWN_REGEX[style], contentBlock, callback);
|
|
},
|
|
component: (props) => (
|
|
<span className={"mx_MarkdownElement mx_Markdown_" + style}>
|
|
{props.children}
|
|
</span>
|
|
)
|
|
}));
|
|
|
|
markdownDecorators.push({
|
|
strategy: (contentState, contentBlock, callback) => {
|
|
return findWithRegex(MARKDOWN_REGEX.LINK, contentBlock, callback);
|
|
},
|
|
component: (props) => (
|
|
<a href="#" className="mx_MarkdownElement mx_Markdown_LINK">
|
|
{props.children}
|
|
</a>
|
|
)
|
|
});
|
|
// markdownDecorators.push(emojiDecorator);
|
|
// TODO Consider renabling "syntax highlighting" when we can do it properly
|
|
return [emojiDecorator];
|
|
}
|
|
|
|
/**
|
|
* Passes rangeToReplace to modifyFn and replaces it in contentState with the result.
|
|
*/
|
|
export function modifyText(contentState: ContentState, rangeToReplace: SelectionState,
|
|
modifyFn: (text: string) => string, inlineStyle, entityKey): ContentState {
|
|
let getText = (key) => contentState.getBlockForKey(key).getText(),
|
|
startKey = rangeToReplace.getStartKey(),
|
|
startOffset = rangeToReplace.getStartOffset(),
|
|
endKey = rangeToReplace.getEndKey(),
|
|
endOffset = rangeToReplace.getEndOffset(),
|
|
text = "";
|
|
|
|
|
|
for (let currentKey = startKey;
|
|
currentKey && currentKey !== endKey;
|
|
currentKey = contentState.getKeyAfter(currentKey)) {
|
|
let blockText = getText(currentKey);
|
|
text += blockText.substring(startOffset, blockText.length);
|
|
|
|
// from now on, we'll take whole blocks
|
|
startOffset = 0;
|
|
}
|
|
|
|
// add remaining part of last block
|
|
text += getText(endKey).substring(startOffset, endOffset);
|
|
|
|
return Modifier.replaceText(contentState, rangeToReplace, modifyFn(text), inlineStyle, entityKey);
|
|
}
|
|
|
|
/**
|
|
* Computes the plaintext offsets of the given SelectionState.
|
|
* Note that this inherently means we make assumptions about what that means (no separator between ContentBlocks, etc)
|
|
* Used by autocomplete to show completions when the current selection lies within, or at the edges of a command.
|
|
*/
|
|
export function selectionStateToTextOffsets(selectionState: SelectionState,
|
|
contentBlocks: Array<ContentBlock>): {start: number, end: number} {
|
|
let offset = 0, start = 0, end = 0;
|
|
for (let block of contentBlocks) {
|
|
if (selectionState.getStartKey() === block.getKey()) {
|
|
start = offset + selectionState.getStartOffset();
|
|
}
|
|
if (selectionState.getEndKey() === block.getKey()) {
|
|
end = offset + selectionState.getEndOffset();
|
|
break;
|
|
}
|
|
offset += block.getLength();
|
|
}
|
|
|
|
return {
|
|
start,
|
|
end,
|
|
};
|
|
}
|
|
|
|
export function textOffsetsToSelectionState({start, end}: SelectionRange,
|
|
contentBlocks: Array<ContentBlock>): SelectionState {
|
|
let selectionState = SelectionState.createEmpty();
|
|
// Subtract block lengths from `start` and `end` until they are less than the current
|
|
// block length (accounting for the NL at the end of each block). Set them to -1 to
|
|
// indicate that the corresponding selection state has been determined.
|
|
for (const block of contentBlocks) {
|
|
const blockLength = block.getLength();
|
|
// -1 indicating that the position start position has been found
|
|
if (start !== -1) {
|
|
if (start < blockLength + 1) {
|
|
selectionState = selectionState.merge({
|
|
anchorKey: block.getKey(),
|
|
anchorOffset: start,
|
|
});
|
|
start = -1; // selection state for the start calculated
|
|
} else {
|
|
start -= blockLength + 1; // +1 to account for newline between blocks
|
|
}
|
|
}
|
|
// -1 indicating that the position end position has been found
|
|
if (end !== -1) {
|
|
if (end < blockLength + 1) {
|
|
selectionState = selectionState.merge({
|
|
focusKey: block.getKey(),
|
|
focusOffset: end,
|
|
});
|
|
end = -1; // selection state for the end calculated
|
|
} else {
|
|
end -= blockLength + 1; // +1 to account for newline between blocks
|
|
}
|
|
}
|
|
}
|
|
return selectionState;
|
|
}
|
|
|
|
// modified version of https://github.com/draft-js-plugins/draft-js-plugins/blob/master/draft-js-emoji-plugin/src/modifiers/attachImmutableEntitiesToEmojis.js
|
|
export function attachImmutableEntitiesToEmoji(editorState: EditorState): EditorState {
|
|
const contentState = editorState.getCurrentContent();
|
|
const blocks = contentState.getBlockMap();
|
|
let newContentState = contentState;
|
|
|
|
blocks.forEach((block) => {
|
|
const plainText = block.getText();
|
|
|
|
const addEntityToEmoji = (start, end) => {
|
|
const existingEntityKey = block.getEntityAt(start);
|
|
if (existingEntityKey) {
|
|
// avoid manipulation in case the emoji already has an entity
|
|
const entity = newContentState.getEntity(existingEntityKey);
|
|
if (entity && entity.get('type') === 'emoji') {
|
|
return;
|
|
}
|
|
}
|
|
|
|
const selection = SelectionState.createEmpty(block.getKey())
|
|
.set('anchorOffset', start)
|
|
.set('focusOffset', end);
|
|
const emojiText = plainText.substring(start, end);
|
|
newContentState = newContentState.createEntity(
|
|
'emoji', 'IMMUTABLE', { emojiUnicode: emojiText }
|
|
);
|
|
const entityKey = newContentState.getLastCreatedEntityKey();
|
|
newContentState = Modifier.replaceText(
|
|
newContentState,
|
|
selection,
|
|
emojiText,
|
|
null,
|
|
entityKey,
|
|
);
|
|
};
|
|
|
|
findWithRegex(EMOJI_REGEX, block, addEntityToEmoji);
|
|
});
|
|
|
|
if (!newContentState.equals(contentState)) {
|
|
const oldSelection = editorState.getSelection();
|
|
editorState = EditorState.push(
|
|
editorState,
|
|
newContentState,
|
|
'convert-to-immutable-emojis',
|
|
);
|
|
// this is somewhat of a hack, we're undoing selection changes caused above
|
|
// it would be better not to make those changes in the first place
|
|
editorState = EditorState.forceSelection(editorState, oldSelection);
|
|
}
|
|
|
|
return editorState;
|
|
}
|
|
|
|
export function hasMultiLineSelection(editorState: EditorState): boolean {
|
|
const selectionState = editorState.getSelection();
|
|
const anchorKey = selectionState.getAnchorKey();
|
|
const currentContent = editorState.getCurrentContent();
|
|
const currentContentBlock = currentContent.getBlockForKey(anchorKey);
|
|
const start = selectionState.getStartOffset();
|
|
const end = selectionState.getEndOffset();
|
|
const selectedText = currentContentBlock.getText().slice(start, end);
|
|
return selectedText.includes('\n');
|
|
}
|