Add support for plugin links

[Mm2PL]

Gives plugins the ability to add links to message elements

[Mm2PL]

@Nerixyz I'd like your review on this PR.

[github-actions]

clang-tidy made some suggestions

[pajlada]

Additionally, would be nice with a test for this functionality showing some example usages

[Mm2PL]

I'd prefer if we wait with plugin-provided tooltips for Links until we have a safe interface for it (i.e. a way to set a tooltip that only allows for plaintext stuff)

The tooltip data is now ignored when using links.

I can't mark your comment as resolved

[github-actions]

clang-tidy made some suggestions

[Nerixyz]

I haven't tested this yet but the code looks fine except the clang-tidy suggestion.

[Nerixyz]

From testing:

• Links on timestamp elements don't work because they create a text element without passing the link/tooltip
• Links on reply curves don't work because it doesn't have a hitbox - its height is 0

Test

c2.register_command("/links", function(ctx)
    local chan = ctx.channel
    chan:add_message(c2.Message.new({
        id = "testing42",
        elements = { { type = "text", text = "testing" } },
    }))
    local lb = { type = "linebreak", flags = c2.MessageElementFlag.Text };
    chan:add_message(c2.Message.new({
        elements = {
            {
                type = "text",
                text = "Text Element",
                link = { type = c2.LinkType.Url, value = "https://twitch.com/forsen" },
            },
            {
                type = "single-line-text",
                text = "single-line-text",
                link = { type = c2.LinkType.UserInfo, value = "id:141981764" },
            },
            {
                type = "mention",
                display_name = "display_name[Mention]",
                login_name = "twitchdev",
                user_color = "link",
                fallback_color = "link",
            },
            {
                type = "timestamp",
                link = { type = c2.LinkType.JumpToChannel, value = "twitchdev" }
            },
            lb,
            {
                type = "reply-curve",
                link = { type = c2.LinkType.CopyToClipboard, value = "hello world" }
            },
            {
                type = "text",
                text = "some text",
            }
        }
    }))
    chan:add_message(c2.Message.new({
        flags = c2.MessageFlag.Centered,
        elements = {
            {
                type = "text",
                text = "Available Links",
                style = c2.FontStyle.ChatVeryLarge,
            },
            lb,
            {
                type = "text",
                text = "JumpToChannel",
                link = { type = c2.LinkType.JumpToChannel, value = "twitchdev" },
            },
            lb,
            {
                type = "text",
                text = "JumpToMessage",
                link = { type = c2.LinkType.JumpToMessage, value = "testing42" },
            },
            lb,
            {
                type = "text",
                text = "CopyToClipboard",
                link = { type = c2.LinkType.CopyToClipboard, value = "Hello, World!" },
            },
            lb,
            {
                type = "text",
                text = "Url",
                link = { type = c2.LinkType.Url, value = "https://example.com" },
            },
            lb,
            {
                type = "text",
                text = "UserAction",
                link = { type = c2.LinkType.UserAction, value = "My user action" },
            },
            lb,
            {
                type = "text",
                text = "UserInfo",
                link = { type = c2.LinkType.UserInfo, value = "twitchdev" },
            }
        }
    }))
end)

[Nerixyz]

Works fine for me now.

[pajlada]

this pr changes the way the curve element renders. I'm ok with either re-breaking curve element links in this PR, or ensuring they look the same.

new:

old:

[Mm2PL]

@pajlada I have re-broken reply-curves, they now should render the same as before.

[Mm2PL]

@pajlada could you review this when you have time?

[pajlada]

@pajlada could you review this when you have time?

I'll start taking a look at these leftover PRs this weekend

[pajlada]

Just fix the changelog entry and you can merge this in

[pajlada]

fix the changelog entry (move it to the right place)