/*
Copyright 2019 New Vector Ltd
Copyright 2019, 2020 The Matrix.org Foundation C.I.C.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
import Markdown from '../Markdown';
import {makeGenericPermalink} from "../utils/permalinks/Permalinks";
import EditorModel from "./model";
import { AllHtmlEntities } from 'html-entities';
import SettingsStore from '../settings/SettingsStore';
import SdkConfig from '../SdkConfig';
import cheerio from 'cheerio';
export function mdSerialize(model: EditorModel) {
return model.parts.reduce((html, part) => {
switch (part.type) {
case "newline":
return html + "\n";
case "plain":
case "command":
case "pill-candidate":
case "at-room-pill":
return html + part.text;
case "room-pill":
case "user-pill":
return html +
`[${part.text.replace(/[[\\\]]/g, c => "\\" + c)}](${makeGenericPermalink(part.resourceId)})`;
}
}, "");
}
export function markdownSerializeIfNeeded(md: string, {forceHTML = false} = {}, {forceTEX = false} = {}) {
// copy of raw input to remove unwanted math later
const orig = md;
if (SettingsStore.getValue("feature_latex_maths")) {
if (forceTEX) {
const displayPattern = "(^|[^\\\\$])\\$\\$(([^$]|\\\\\\$)+?)\\$\\$";
const inlinePattern = "(^|[^\\\\$])\\$(([^$]|\\\\\\$)*([^\\\\\\$]|\\\\\\$))\\$";
md = md.replace(RegExp(displayPattern, "gm"), function(m, p1, p2) {
const p2e = AllHtmlEntities.encode(p2);
return `${p1}
\n\n
\n\n`;
});
md = md.replace(RegExp(inlinePattern, "gm"), function(m, p1, p2) {
const p2e = AllHtmlEntities.encode(p2);
return `${p1}`;
});
} else {
// detect math with tex delimiters, inline: $...$, display $$...$$
// preferably use negative lookbehinds, not supported in all major browsers:
// const displayPattern = "^(?\n\n\n\n`;
});
md = md.replace(RegExp(inlinePatternDollar, "gm"), function(m, p1, p2) {
const p2e = AllHtmlEntities.encode(p2);
return `${p1}`;
});
// detect math with latex delimiters, inline: \(...\), display \[...\]
// conditions for display math detection \[...\]:
// - pattern starts at beginning of line or is not prefixed with backslash
// - pattern is not empty
const displayPattern = (SdkConfig.get()['latex_maths_delims'] || {})['display_pattern'] ||
"(^|[^\\\\])\\\\\\[(?!\\\\\\])(.*?)\\\\\\]";
// conditions for inline math detection \(...\):
// - pattern starts at beginning of line or is not prefixed with backslash
// - pattern is not empty
const inlinePattern = (SdkConfig.get()['latex_maths_delims'] || {})['inline_pattern'] ||
"(^|[^\\\\])\\\\\\((?!\\\\\\))(.*?)\\\\\\)";
md = md.replace(RegExp(displayPattern, "gms"), function(m, p1, p2) {
const p2e = AllHtmlEntities.encode(p2);
return `${p1}\n\n
\n\n`;
});
md = md.replace(RegExp(inlinePattern, "gms"), function(m, p1, p2) {
const p2e = AllHtmlEntities.encode(p2);
return `${p1}`;
});
}
// make sure div tags always start on a new line, otherwise it will confuse
// the markdown parser
md = md.replace(/(.)${tex}`)
}
});
}
return phtml.html();
}
// ensure removal of escape backslashes in non-Markdown messages
if (md.indexOf("\\") > -1) {
return parser.toPlaintext();
}
}
export function htmlSerializeIfNeeded(model: EditorModel, {forceHTML = false} = {}) {
const md = mdSerialize(model);
return markdownSerializeIfNeeded(md, {forceHTML: forceHTML});
}
export function textSerialize(model: EditorModel) {
return model.parts.reduce((text, part) => {
switch (part.type) {
case "newline":
return text + "\n";
case "plain":
case "command":
case "pill-candidate":
case "at-room-pill":
return text + part.text;
case "room-pill":
case "user-pill":
return text + `${part.text}`;
}
}, "");
}
export function containsEmote(model: EditorModel) {
return startsWith(model, "/me ", false);
}
export function startsWith(model: EditorModel, prefix: string, caseSensitive = true) {
const firstPart = model.parts[0];
// part type will be "plain" while editing,
// and "command" while composing a message.
let text = firstPart && firstPart.text;
if (!caseSensitive) {
prefix = prefix.toLowerCase();
text = text.toLowerCase();
}
return firstPart && (firstPart.type === "plain" || firstPart.type === "command") && text.startsWith(prefix);
}
export function stripEmoteCommand(model: EditorModel) {
// trim "/me "
return stripPrefix(model, "/me ");
}
export function stripPrefix(model: EditorModel, prefix: string) {
model = model.clone();
model.removeText({index: 0, offset: 0}, prefix.length);
return model;
}
export function unescapeMessage(model: EditorModel) {
const {parts} = model;
if (parts.length) {
const firstPart = parts[0];
// only unescape \/ to / at start of editor
if (firstPart.type === "plain" && firstPart.text.startsWith("\\/")) {
model = model.clone();
model.removeText({index: 0, offset: 0}, 1);
}
}
return model;
}