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Add script for the Telegram web interface #9

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Merged
michaelDCurran merged 2 commits into from
Jan 17, 2017
Merged

Add script for the Telegram web interface #9

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68104bf
Add script for the Telegram web interface which automatically report…
michaelDCurran Jan 17, 2017
7adfe59
Address review of #9
michaelDCurran Jan 17, 2017
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53 changes: 53 additions & 0 deletions TelegramA11yFixes.user.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,53 @@
// ==UserScript==
// @name Telegram Accessibility Fixes
// @namespace http://axSGrease.nvaccess.org/
// @description Improves the accessibility of Telegram.
// @author Michael Curran <mick@nvaccess.org>
// @copyright 2016 NV Access Limited
// @license GNU General Public License version 2.0
// @version 2016.1
// @grant GM_log
// @include https://web.telegram.org/*
// ==/UserScript==

function init() {
var elem;

if (elem = document.querySelector(".im_history_messages_peer")) {
// Chat history.
elem.setAttribute("aria-live", "polite");
}
}

function onNodeAdded(target) {
if(target.classList.contains('im_content_message_wrap')) {
target.setAttribute("aria-live", "polite");
}
}

function onClassModified(target) {
}

var observer = new MutationObserver(function(mutations) {
for (var mutation of mutations) {
try {
if (mutation.type === "childList") {
for (var node of mutation.addedNodes) {
if (node.nodeType != Node.ELEMENT_NODE)
continue;
onNodeAdded(node);
}
} else if (mutation.type === "attributes") {
if (mutation.attributeName == "class")
onClassModified(mutation.target);
}
} catch (e) {
// Catch exceptions for individual mutations so other mutations are still handled.
GM_log("Exception while handling mutation: " + e);
}
}
});
observer.observe(document, {childList: true, attributes: true,
subtree: true, attributeFilter: ["class"]});

init();
9 changes: 9 additions & 0 deletions readme.md
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Original file line number Diff line number Diff line change
Expand Up @@ -71,3 +71,12 @@ It does the following:
- Makes day separators in the message history and the about channel pane heading accessible as headings.
- Reports incoming messages automatically (using a live region).
- Hides an editable area which isn't shown visually.

### Telegram accessibility fixes
[Download Telegram Accessibility Fixes](https://github.com/nvaccess/axSGrease/raw/master/TelegramA11yFixes.user.js)

This script improves the accessibility of the [Telegram instant messaging](https://web.telegram.org/) web interface.

It so far does the following:

- Marks the chat history as a live region so new messages are announced automatically.