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Decend into P & DIV elements while parsing a message.

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Also split on newline so all newlines are represented by a newlinepart
This commit is contained in:
Bruno Windels 2019-05-22 13:00:39 +02:00
parent 5f5a2f7140
commit 723086e4d7
1 changed files with 88 additions and 31 deletions
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119
src/editor/deserialize.js
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@ -18,54 +18,111 @@ limitations under the License.
import { MATRIXTO_URL_PATTERN } from '../linkify-matrix';
import { PlainPart, UserPillPart, RoomPillPart, NewlinePart } from "./parts";
const REGEX_MATRIXTO = new RegExp(MATRIXTO_URL_PATTERN);
function parseLink(a, parts, room) {
const {href} = a;
const pillMatch = REGEX_MATRIXTO.exec(href) || [];
const resourceId = pillMatch[1]; // The room/user ID
const prefix = pillMatch[2]; // The first character of prefix
switch (prefix) {
case "@":
parts.push(new UserPillPart(
resourceId,
a.textContent,
room.getMember(resourceId),
));
break;
case "#":
parts.push(new RoomPillPart(resourceId));
break;
default: {
if (href === a.textContent) {
parts.push(new PlainPart(a.textContent));
} else {
parts.push(new PlainPart(`[${a.textContent}](${href})`));
}
break;
}
}
}
function parseHtmlMessage(html, room) {
const REGEX_MATRIXTO = new RegExp(MATRIXTO_URL_PATTERN);
// 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 nodes = Array.from(new DOMParser().parseFromString(html, "text/html").body.childNodes);
const parts = nodes.map(n => {
const root = new DOMParser().parseFromString(html, "text/html").body;
let n = root.firstChild;
const parts = [];
let isFirstNode = true;
while (n && n !== root) {
switch (n.nodeType) {
case Node.TEXT_NODE:
return new PlainPart(n.nodeValue);
// the plainpart doesn't accept \n and will cause
// a newlinepart to be created.
if (n.nodeValue !== "\n") {
parts.push(new PlainPart(n.nodeValue));
}
break;
case Node.ELEMENT_NODE:
switch (n.nodeName) {
case "MX-REPLY":
return null;
case "A": {
const {href} = n;
const pillMatch = REGEX_MATRIXTO.exec(href) || [];
const resourceId = pillMatch[1]; // The room/user ID
const prefix = pillMatch[2]; // The first character of prefix
switch (prefix) {
case "@": return new UserPillPart(resourceId, n.textContent, room.getMember(resourceId));
case "#": return new RoomPillPart(resourceId);
default: {
if (href === n.textContent) {
return new PlainPart(n.textContent);
} else {
return new PlainPart(`[${n.textContent}](${href})`);
}
}
case "DIV":
case "P": {
// block element should cause line break if not first
if (!isFirstNode) {
parts.push(new NewlinePart("\n"));
}
// decend into paragraph or div
if (n.firstChild) {
n = n.firstChild;
continue;
} else {
break;
}
}
case "A": {
parseLink(n, parts, room);
break;
}
case "BR":
return new NewlinePart("\n");
parts.push(new NewlinePart("\n"));
break;
case "EM":
return new PlainPart(`*${n.textContent}*`);
parts.push(new PlainPart(`*${n.textContent}*`));
break;
case "STRONG":
return new PlainPart(`**${n.textContent}**`);
case "PRE":
return new PlainPart(`\`\`\`\n${n.textContent}\`\`\``);
parts.push(new PlainPart(`**${n.textContent}**`));
break;
case "PRE": {
// block element should cause line break if not first
if (!isFirstNode) {
parts.push(new NewlinePart("\n"));
}
const preLines = `\`\`\`\n${n.textContent}\`\`\``.split("\n");
preLines.forEach((l, i) => {
parts.push(new PlainPart(l));
if (i < preLines.length - 1) {
parts.push(new NewlinePart("\n"));
}
});
break;
}
case "CODE":
return new PlainPart(`\`${n.textContent}\``);
parts.push(new PlainPart(`\`${n.textContent}\``));
break;
default:
return new PlainPart(n.textContent);
parts.push(new PlainPart(n.textContent));
break;
}
default:
return null;
break;
}
}).filter(p => !!p);
// go up if we can't go next
if (!n.nextSibling) {
n = n.parentElement;
}
n = n.nextSibling;
isFirstNode = false;
}
return parts;
}