matrix-react-sdk
Version:
SDK for matrix.org using React
415 lines (337 loc) • 39.9 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.parsePlainTextMessage = parsePlainTextMessage;
exports.parseEvent = parseEvent;
var _dom = require("./dom");
var _HtmlUtils = require("../HtmlUtils");
var _Permalinks = require("../utils/permalinks/Permalinks");
var _SdkConfig = _interopRequireDefault(require("../SdkConfig"));
/*
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.
*/
function parseAtRoomMentions(text
/*: string*/
, partCreator
/*: PartCreator*/
) {
const ATROOM = "@room";
const parts = [];
text.split(ATROOM).forEach((textPart, i, arr) => {
if (textPart.length) {
parts.push(partCreator.plain(textPart));
} // it's safe to never append @room after the last textPart
// as split will report an empty string at the end if
// `text` ended in @room.
const isLast = i === arr.length - 1;
if (!isLast) {
parts.push(partCreator.atRoomPill(ATROOM));
}
});
return parts;
}
function parseLink(a
/*: HTMLAnchorElement*/
, partCreator
/*: PartCreator*/
) {
const {
href
} = a;
const resourceId = (0, _Permalinks.getPrimaryPermalinkEntity)(href); // The room/user ID
const prefix = resourceId ? resourceId[0] : undefined; // First character of ID
switch (prefix) {
case "@":
return partCreator.userPill(a.textContent, resourceId);
case "#":
return partCreator.roomPill(resourceId);
default:
{
if (href === a.textContent) {
return partCreator.plain(a.textContent);
} else {
return partCreator.plain(`[${a.textContent.replace(/[[\\\]]/g, c => "\\" + c)}](${href})`);
}
}
}
}
function parseImage(img
/*: HTMLImageElement*/
, partCreator
/*: PartCreator*/
) {
const {
src
} = img;
return partCreator.plain(`![${img.alt.replace(/[[\\\]]/g, c => "\\" + c)}](${src})`);
}
function parseCodeBlock(n
/*: HTMLElement*/
, partCreator
/*: PartCreator*/
) {
const parts = [];
let language = "";
if (n.firstChild && n.firstChild.nodeName === "CODE") {
for (const className of n.firstChild.classList) {
if (className.startsWith("language-") && !className.startsWith("language-_")) {
language = className.substr("language-".length);
break;
}
}
}
const preLines = ("```" + language + "\n" + n.textContent + "```").split("\n");
preLines.forEach((l, i) => {
parts.push(partCreator.plain(l));
if (i < preLines.length - 1) {
parts.push(partCreator.newline());
}
});
return parts;
}
function parseHeader(el
/*: HTMLElement*/
, partCreator
/*: PartCreator*/
) {
const depth = parseInt(el.nodeName.substr(1), 10);
return partCreator.plain("#".repeat(depth) + " ");
}
function parseElement(n
/*: HTMLElement*/
, partCreator
/*: PartCreator*/
, lastNode
/*: HTMLElement | undefined*/
, state
/*: IState*/
) {
switch (n.nodeName) {
case "H1":
case "H2":
case "H3":
case "H4":
case "H5":
case "H6":
return parseHeader(n, partCreator);
case "A":
return parseLink(n, partCreator);
case "IMG":
return parseImage(n, partCreator);
case "BR":
return partCreator.newline();
case "EM":
return partCreator.plain(`_${n.textContent}_`);
case "STRONG":
return partCreator.plain(`**${n.textContent}**`);
case "PRE":
return parseCodeBlock(n, partCreator);
case "CODE":
return partCreator.plain(`\`${n.textContent}\``);
case "DEL":
return partCreator.plain(`<del>${n.textContent}</del>`);
case "LI":
{
const indent = " ".repeat(state.listDepth - 1);
if (n.parentElement.nodeName === "OL") {
// The markdown parser doesn't do nested indexed lists at all, but this supports it anyway.
const index = state.listIndex[state.listIndex.length - 1];
state.listIndex[state.listIndex.length - 1] += 1;
return partCreator.plain(`${indent}${index}. `);
} else {
return partCreator.plain(`${indent}- `);
}
}
case "P":
{
if (lastNode) {
return partCreator.newline();
}
break;
}
case "DIV":
case "SPAN":
{
// math nodes are translated back into delimited latex strings
if (n.hasAttribute("data-mx-maths")) {
const delimLeft = n.nodeName == "SPAN" ? ((_SdkConfig.default.get()['latex_maths_delims'] || {})['inline'] || {})['left'] || "\\(" : ((_SdkConfig.default.get()['latex_maths_delims'] || {})['display'] || {})['left'] || "\\[";
const delimRight = n.nodeName == "SPAN" ? ((_SdkConfig.default.get()['latex_maths_delims'] || {})['inline'] || {})['right'] || "\\)" : ((_SdkConfig.default.get()['latex_maths_delims'] || {})['display'] || {})['right'] || "\\]";
const tex = n.getAttribute("data-mx-maths");
return partCreator.plain(delimLeft + tex + delimRight);
} else if (!checkDescendInto(n)) {
return partCreator.plain(n.textContent);
}
break;
}
case "OL":
state.listIndex.push(n.start || 1);
/* falls through */
case "UL":
state.listDepth = (state.listDepth || 0) + 1;
/* falls through */
default:
// don't textify block nodes we'll descend into
if (!checkDescendInto(n)) {
return partCreator.plain(n.textContent);
}
}
}
function checkDescendInto(node) {
switch (node.nodeName) {
case "PRE":
// a code block is textified in parseCodeBlock
// as we don't want to preserve markup in it,
// so no need to descend into it
return false;
default:
return (0, _HtmlUtils.checkBlockNode)(node);
}
}
function checkIgnored(n) {
if (n.nodeType === Node.TEXT_NODE) {
// Element adds \n text nodes in a lot of places,
// which should be ignored
return n.nodeValue === "\n";
} else if (n.nodeType === Node.ELEMENT_NODE) {
return n.nodeName === "MX-REPLY";
}
return true;
}
const QUOTE_LINE_PREFIX = "> ";
function prefixQuoteLines(isFirstNode, parts, partCreator) {
// a newline (to append a > to) wouldn't be added to parts for the first line
// if there was no content before the BLOCKQUOTE, so handle that
if (isFirstNode) {
parts.splice(0, 0, partCreator.plain(QUOTE_LINE_PREFIX));
}
for (let i = 0; i < parts.length; i += 1) {
if (parts[i].type === "newline") {
parts.splice(i + 1, 0, partCreator.plain(QUOTE_LINE_PREFIX));
i += 1;
}
}
}
function parseHtmlMessage(html
/*: string*/
, partCreator
/*: PartCreator*/
, isQuotedMessage
/*: boolean*/
) {
// no nodes from parsing here should be inserted in the document,
// as scripts in event handlers, etc would be executed then.
// we're only taking text, so that is fine
const rootNode = new DOMParser().parseFromString(html, "text/html").body;
const parts = [];
let lastNode;
let inQuote = isQuotedMessage;
const state
/*: IState*/
= {
listIndex: []
};
function onNodeEnter(n) {
if (checkIgnored(n)) {
return false;
}
if (n.nodeName === "BLOCKQUOTE") {
inQuote = true;
}
const newParts = [];
if (lastNode && ((0, _HtmlUtils.checkBlockNode)(lastNode) || (0, _HtmlUtils.checkBlockNode)(n))) {
newParts.push(partCreator.newline());
}
if (n.nodeType === Node.TEXT_NODE) {
newParts.push(...parseAtRoomMentions(n.nodeValue, partCreator));
} else if (n.nodeType === Node.ELEMENT_NODE) {
const parseResult = parseElement(n, partCreator, lastNode, state);
if (parseResult) {
if (Array.isArray(parseResult)) {
newParts.push(...parseResult);
} else {
newParts.push(parseResult);
}
}
}
if (newParts.length && inQuote) {
const isFirstPart = parts.length === 0;
prefixQuoteLines(isFirstPart, newParts, partCreator);
}
parts.push(...newParts);
const descend = checkDescendInto(n); // when not descending (like for PRE), onNodeLeave won't be called to set lastNode
// so do that here.
lastNode = descend ? null : n;
return descend;
}
function onNodeLeave(n) {
if (checkIgnored(n)) {
return;
}
switch (n.nodeName) {
case "BLOCKQUOTE":
inQuote = false;
break;
case "OL":
state.listIndex.pop();
/* falls through */
case "UL":
state.listDepth -= 1;
break;
}
lastNode = n;
}
(0, _dom.walkDOMDepthFirst)(rootNode, onNodeEnter, onNodeLeave);
return parts;
}
function parsePlainTextMessage(body
/*: string*/
, partCreator
/*: PartCreator*/
, isQuotedMessage
/*: boolean*/
) {
const lines = body.split(/\r\n|\r|\n/g); // split on any new-line combination not just \n, collapses \r\n
return lines.reduce((parts, line, i) => {
if (isQuotedMessage) {
parts.push(partCreator.plain(QUOTE_LINE_PREFIX));
}
parts.push(...parseAtRoomMentions(line, partCreator));
const isLast = i === lines.length - 1;
if (!isLast) {
parts.push(partCreator.newline());
}
return parts;
}, []);
}
function parseEvent(event
/*: MatrixEvent*/
, partCreator
/*: PartCreator*/
, {
isQuotedMessage = false
} = {}) {
const content = event.getContent();
let parts;
if (content.format === "org.matrix.custom.html") {
parts = parseHtmlMessage(content.formatted_body || "", partCreator, isQuotedMessage);
} else {
parts = parsePlainTextMessage(content.body || "", partCreator, isQuotedMessage);
}
if (content.msgtype === "m.emote") {
parts.unshift(partCreator.plain("/me "));
}
return parts;
}
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2019 New Vector Ltd\nCopyright 2019, 2020 The Matrix.org Foundation C.I.C.\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n*/\n\nimport { MatrixEvent } from \"matrix-js-sdk/src/models/event\";\n\nimport { walkDOMDepthFirst } from \"./dom\";\nimport { checkBlockNode } from \"../HtmlUtils\";\nimport { getPrimaryPermalinkEntity } from \"../utils/permalinks/Permalinks\";\nimport { PartCreator } from \"./parts\";\nimport SdkConfig from \"../SdkConfig\";\n\nfunction parseAtRoomMentions(text: string, partCreator: PartCreator) {\n    const ATROOM = \"@room\";\n    const parts = [];\n    text.split(ATROOM).forEach((textPart, i, arr) => {\n        if (textPart.length) {\n            parts.push(partCreator.plain(textPart));\n        }\n        // it's safe to never append @room after the last textPart\n        // as split will report an empty string at the end if\n        // `text` ended in @room.\n        const isLast = i === arr.length - 1;\n        if (!isLast) {\n            parts.push(partCreator.atRoomPill(ATROOM));\n        }\n    });\n    return parts;\n}\n\nfunction parseLink(a: HTMLAnchorElement, partCreator: PartCreator) {\n    const {href} = a;\n    const resourceId = getPrimaryPermalinkEntity(href); // The room/user ID\n    const prefix = resourceId ? resourceId[0] : undefined; // First character of ID\n    switch (prefix) {\n        case \"@\":\n            return partCreator.userPill(a.textContent, resourceId);\n        case \"#\":\n            return partCreator.roomPill(resourceId);\n        default: {\n            if (href === a.textContent) {\n                return partCreator.plain(a.textContent);\n            } else {\n                return partCreator.plain(`[${a.textContent.replace(/[[\\\\\\]]/g, c => \"\\\\\" + c)}](${href})`);\n            }\n        }\n    }\n}\n\nfunction parseImage(img: HTMLImageElement, partCreator: PartCreator) {\n    const { src } = img;\n    return partCreator.plain(`![${img.alt.replace(/[[\\\\\\]]/g, c => \"\\\\\" + c)}](${src})`);\n}\n\nfunction parseCodeBlock(n: HTMLElement, partCreator: PartCreator) {\n    const parts = [];\n    let language = \"\";\n    if (n.firstChild && n.firstChild.nodeName === \"CODE\") {\n        for (const className of (<HTMLElement>n.firstChild).classList) {\n            if (className.startsWith(\"language-\") && !className.startsWith(\"language-_\")) {\n                language = className.substr(\"language-\".length);\n                break;\n            }\n        }\n    }\n    const preLines = (\"```\" + language + \"\\n\" + n.textContent + \"```\").split(\"\\n\");\n    preLines.forEach((l, i) => {\n        parts.push(partCreator.plain(l));\n        if (i < preLines.length - 1) {\n            parts.push(partCreator.newline());\n        }\n    });\n    return parts;\n}\n\nfunction parseHeader(el: HTMLElement, partCreator: PartCreator) {\n    const depth = parseInt(el.nodeName.substr(1), 10);\n    return partCreator.plain(\"#\".repeat(depth) + \" \");\n}\n\ninterface IState {\n    listIndex: number[];\n    listDepth?: number;\n}\n\nfunction parseElement(n: HTMLElement, partCreator: PartCreator, lastNode: HTMLElement | undefined, state: IState) {\n    switch (n.nodeName) {\n        case \"H1\":\n        case \"H2\":\n        case \"H3\":\n        case \"H4\":\n        case \"H5\":\n        case \"H6\":\n            return parseHeader(n, partCreator);\n        case \"A\":\n            return parseLink(<HTMLAnchorElement>n, partCreator);\n        case \"IMG\":\n            return parseImage(<HTMLImageElement>n, partCreator);\n        case \"BR\":\n            return partCreator.newline();\n        case \"EM\":\n            return partCreator.plain(`_${n.textContent}_`);\n        case \"STRONG\":\n            return partCreator.plain(`**${n.textContent}**`);\n        case \"PRE\":\n            return parseCodeBlock(n, partCreator);\n        case \"CODE\":\n            return partCreator.plain(`\\`${n.textContent}\\``);\n        case \"DEL\":\n            return partCreator.plain(`<del>${n.textContent}</del>`);\n        case \"LI\": {\n            const indent = \"  \".repeat(state.listDepth - 1);\n            if (n.parentElement.nodeName === \"OL\") {\n                // The markdown parser doesn't do nested indexed lists at all, but this supports it anyway.\n                const index = state.listIndex[state.listIndex.length - 1];\n                state.listIndex[state.listIndex.length - 1] += 1;\n                return partCreator.plain(`${indent}${index}. `);\n            } else {\n                return partCreator.plain(`${indent}- `);\n            }\n        }\n        case \"P\": {\n            if (lastNode) {\n                return partCreator.newline();\n            }\n            break;\n        }\n        case \"DIV\":\n        case \"SPAN\": {\n            // math nodes are translated back into delimited latex strings\n            if (n.hasAttribute(\"data-mx-maths\")) {\n                const delimLeft = (n.nodeName == \"SPAN\") ?\n                    ((SdkConfig.get()['latex_maths_delims'] || {})['inline'] || {})['left'] || \"\\\\(\" :\n                    ((SdkConfig.get()['latex_maths_delims'] || {})['display'] || {})['left'] || \"\\\\[\";\n                const delimRight = (n.nodeName == \"SPAN\") ?\n                    ((SdkConfig.get()['latex_maths_delims'] || {})['inline'] || {})['right'] || \"\\\\)\" :\n                    ((SdkConfig.get()['latex_maths_delims'] || {})['display'] || {})['right'] || \"\\\\]\";\n                const tex = n.getAttribute(\"data-mx-maths\");\n                return partCreator.plain(delimLeft + tex + delimRight);\n            } else if (!checkDescendInto(n)) {\n                return partCreator.plain(n.textContent);\n            }\n            break;\n        }\n        case \"OL\":\n            state.listIndex.push((<HTMLOListElement>n).start || 1);\n            /* falls through */\n        case \"UL\":\n            state.listDepth = (state.listDepth || 0) + 1;\n            /* falls through */\n        default:\n            // don't textify block nodes we'll descend into\n            if (!checkDescendInto(n)) {\n                return partCreator.plain(n.textContent);\n            }\n    }\n}\n\nfunction checkDescendInto(node) {\n    switch (node.nodeName) {\n        case \"PRE\":\n            // a code block is textified in parseCodeBlock\n            // as we don't want to preserve markup in it,\n            // so no need to descend into it\n            return false;\n        default:\n            return checkBlockNode(node);\n    }\n}\n\nfunction checkIgnored(n) {\n    if (n.nodeType === Node.TEXT_NODE) {\n        // Element adds \\n text nodes in a lot of places,\n        // which should be ignored\n        return n.nodeValue === \"\\n\";\n    } else if (n.nodeType === Node.ELEMENT_NODE) {\n        return n.nodeName === \"MX-REPLY\";\n    }\n    return true;\n}\n\nconst QUOTE_LINE_PREFIX = \"> \";\nfunction prefixQuoteLines(isFirstNode, parts, partCreator) {\n    // a newline (to append a > to) wouldn't be added to parts for the first line\n    // if there was no content before the BLOCKQUOTE, so handle that\n    if (isFirstNode) {\n        parts.splice(0, 0, partCreator.plain(QUOTE_LINE_PREFIX));\n    }\n    for (let i = 0; i < parts.length; i += 1) {\n        if (parts[i].type === \"newline\") {\n            parts.splice(i + 1, 0, partCreator.plain(QUOTE_LINE_PREFIX));\n            i += 1;\n        }\n    }\n}\n\nfunction parseHtmlMessage(html: string, partCreator: PartCreator, isQuotedMessage: boolean) {\n    // no nodes from parsing here should be inserted in the document,\n    // as scripts in event handlers, etc would be executed then.\n    // we're only taking text, so that is fine\n    const rootNode = new DOMParser().parseFromString(html, \"text/html\").body;\n    const parts = [];\n    let lastNode;\n    let inQuote = isQuotedMessage;\n    const state: IState = {\n        listIndex: [],\n    };\n\n    function onNodeEnter(n) {\n        if (checkIgnored(n)) {\n            return false;\n        }\n        if (n.nodeName === \"BLOCKQUOTE\") {\n            inQuote = true;\n        }\n\n        const newParts = [];\n        if (lastNode && (checkBlockNode(lastNode) || checkBlockNode(n))) {\n            newParts.push(partCreator.newline());\n        }\n\n        if (n.nodeType === Node.TEXT_NODE) {\n            newParts.push(...parseAtRoomMentions(n.nodeValue, partCreator));\n        } else if (n.nodeType === Node.ELEMENT_NODE) {\n            const parseResult = parseElement(n, partCreator, lastNode, state);\n            if (parseResult) {\n                if (Array.isArray(parseResult)) {\n                    newParts.push(...parseResult);\n                } else {\n                    newParts.push(parseResult);\n                }\n            }\n        }\n\n        if (newParts.length && inQuote) {\n            const isFirstPart = parts.length === 0;\n            prefixQuoteLines(isFirstPart, newParts, partCreator);\n        }\n\n        parts.push(...newParts);\n\n        const descend = checkDescendInto(n);\n        // when not descending (like for PRE), onNodeLeave won't be called to set lastNode\n        // so do that here.\n        lastNode = descend ? null : n;\n        return descend;\n    }\n\n    function onNodeLeave(n) {\n        if (checkIgnored(n)) {\n            return;\n        }\n        switch (n.nodeName) {\n            case \"BLOCKQUOTE\":\n                inQuote = false;\n                break;\n            case \"OL\":\n                state.listIndex.pop();\n                /* falls through */\n            case \"UL\":\n                state.listDepth -= 1;\n                break;\n        }\n        lastNode = n;\n    }\n\n    walkDOMDepthFirst(rootNode, onNodeEnter, onNodeLeave);\n\n    return parts;\n}\n\nexport function parsePlainTextMessage(body: string, partCreator: PartCreator, isQuotedMessage?: boolean) {\n    const lines = body.split(/\\r\\n|\\r|\\n/g); // split on any new-line combination not just \\n, collapses \\r\\n\n    return lines.reduce((parts, line, i) => {\n        if (isQuotedMessage) {\n            parts.push(partCreator.plain(QUOTE_LINE_PREFIX));\n        }\n        parts.push(...parseAtRoomMentions(line, partCreator));\n        const isLast = i === lines.length - 1;\n        if (!isLast) {\n            parts.push(partCreator.newline());\n        }\n        return parts;\n    }, []);\n}\n\nexport function parseEvent(event: MatrixEvent, partCreator: PartCreator, {isQuotedMessage = false} = {}) {\n    const content = event.getContent();\n    let parts;\n    if (content.format === \"org.matrix.custom.html\") {\n        parts = parseHtmlMessage(content.formatted_body || \"\", partCreator, isQuotedMessage);\n    } else {\n        parts = parsePlainTextMessage(content.body || \"\", partCreator, isQuotedMessage);\n    }\n    if (content.msgtype === \"m.emote\") {\n        parts.unshift(partCreator.plain(\"/me \"));\n    }\n    return parts;\n}\n"]}