update draft

This commit is contained in:
John Bowdre 2023-11-09 09:02:29 -06:00
parent 7a60eb33ea
commit 569b9615f0

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@ -118,6 +118,7 @@ echo "TORCHLIGHT_TOKEN=torch_[...]" > ./.env # [tl! .cmd]
[^free]: Torchlight is free for sites which don't generate revenue, though it does require a link back to `torchlight.dev`. I stuck the attribution link in the footer. More pricing info [here].
#### Installation
I then used `npm` to install Torchlight in the root of my Hugo repo:
```shell
npm i @torchlight-api/torchlight-cli # [tl! .cmd]
@ -169,7 +170,10 @@ Node.js v18.17.1
Oh. Hmm.
There's an [open issue](https://github.com/torchlight-api/torchlight-cli/issues/4) which reveals that the stub config file is actually located under the `src/` directory instead of `dist/`. I'll just copy that to my repo root and then set to work modifying it to suit my needs:
There's an [open issue](https://github.com/torchlight-api/torchlight-cli/issues/4) which reveals that the stub config file is actually located under the `src/` directory instead of `dist/`.
#### Configuration
I'll just copy that to my repo root and then set to work modifying it to suit my needs:
```shell
cp node_modules/@torchlight-api/torchlight-cli/src/stubs/config.js ./torchlight.config.js # [tl! .cmd]
@ -212,8 +216,7 @@ module.exports = {
// If there are any diff indicators for a line, put them
// in place of the line number to save horizontal space.
diffIndicatorsInPlaceOfLineNumbers: true // [tl! -- focus:1]
diffIndicatorsInPlaceOfLineNumbers: false // put the diff indicators next to the line numbers [tl! ++ reindex(-1)]
diffIndicatorsInPlaceOfLineNumbers: true
// When lines are collapsed, this is the text that will
// be shown to indicate that they can be expanded.
@ -250,6 +253,150 @@ module.exports = {
You can find more details about the configuration options [here](https://torchlight.dev/docs/clients/cli#configuration-file).
#### Stylization
It's not strictly necessary for the basic functionality, but applying a little bit of extra CSS to match up with the classes leveraged by Torchlight can help to make things look a bit more polished. Fortunately for this _fake-it-til-you-make-it_ dev, Torchlight provides sample CSS that work great for this:
- [Basic CSS](https://torchlight.dev/docs/css) for generally making things look tidy
- [Focus CSS](https://torchlight.dev/docs/annotations/focusing#css) for that slick blur/focus effect
- [Collapse CSS](https://torchlight.dev/docs/annotations/collapsing#required-css) for some accordion action
Put those blocks together (along with a few minor tweaks), and here's what I started with in `assets/css/torchlight.css`:
```css
// torchlight! {"lineNumbers": true}
/*********************************************
* Basic styling for Torchlight code blocks. *
**********************************************/
/*
Margin and rounding are personal preferences,
overflow-x-auto is recommended.
*/
pre {
border-radius: 0.25rem;
margin-top: 1rem;
margin-bottom: 1rem;
overflow-x: auto;
}
/*
Add some vertical padding and expand the width
to fill its container. The horizontal padding
comes at the line level so that background
colors extend edge to edge.
*/
pre.torchlight {
display: block;
min-width: -webkit-max-content;
min-width: -moz-max-content;
min-width: max-content;
padding-top: 1rem;
padding-bottom: 1rem;
}
/*
Horizontal line padding to match the vertical
padding from the code block above.
*/
pre.torchlight .line {
padding-left: 1rem;
padding-right: 1rem;
}
/*
Push the code away from the line numbers and
summary caret indicators.
*/
pre.torchlight .line-number,
pre.torchlight .summary-caret {
margin-right: 1rem;
}
/*********************************************
* Focus styling *
**********************************************/
/*
Blur and dim the lines that don't have the `.line-focus` class,
but are within a code block that contains any focus lines.
*/
.torchlight.has-focus-lines .line:not(.line-focus) {
transition: filter 0.35s, opacity 0.35s;
filter: blur(.095rem);
opacity: .65;
}
/*
When the code block is hovered, bring all the lines into focus.
*/
.torchlight.has-focus-lines:hover .line:not(.line-focus) {
filter: blur(0px);
opacity: 1;
}
/*********************************************
* Collapse styling *
**********************************************/
.torchlight summary:focus {
outline: none;
}
/* Hide the default markers, as we provide our own */
.torchlight details > summary::marker,
.torchlight details > summary::-webkit-details-marker {
display: none;
}
.torchlight details .summary-caret::after {
pointer-events: none;
}
/* Add spaces to keep everything aligned */
.torchlight .summary-caret-empty::after,
.torchlight details .summary-caret-middle::after,
.torchlight details .summary-caret-end::after {
content: " ";
}
/* Show a minus sign when the block is open. */
.torchlight details[open] .summary-caret-start::after {
content: "-";
}
/* And a plus sign when the block is closed. */
.torchlight details:not([open]) .summary-caret-start::after {
content: "+";
}
/* Hide the [...] indicator when open. */
.torchlight details[open] .summary-hide-when-open {
display: none;
}
/* Show the [...] indicator when closed. */
.torchlight details:not([open]) .summary-hide-when-open {
display: initial;
}
/*********************************************
* Additional styling *
**********************************************/
/* Fix for disjointed horizontal scrollbars */
.highlight div {
overflow-x: visible;
}
```
I'll make sure that this CSS gets dynamically attached to any pages with a code block by adding this to the bottom of my `layouts/partials/head.html`:
```html
<!-- syntax highlighting -->
{{ if (findRE "<pre" .Content 1) }}
{{ $syntax := resources.Get "css/torchlight.css" | minify }}
<link href="{{ $syntax.RelPermalink }}" rel="stylesheet">
```
As a bit of housekeeping, I'm also going to remove the built-in highlighter configuration from my `config/_default/markup.toml` file to make sure it doesn't conflict with Torchlight:
```toml
# torchlight! {"lineNumbers": true}
@ -398,5 +545,300 @@ Once that's done, I edit the `netlify.toml` file at the root of my site repo to
Now when I `git push` new content, Netlify will use Hugo to build the site, then install and call Torchlight to `++fancy;` the code blocks before the site gets served. Very nice!
### Hard Mode
Of course, I Just. Can't. leave well enough alone.
### #Goals
Of course, I. Just. Can't. leave well enough alone, so my work here isn't finished - not by a long shot.
You see, I'm a sucker for handy "copy" buttons attached to code blocks, and that's not something that Torchlight does (it just returns rendered HTML, remember? No fancy JavaScript here). I also wanted to add informative prompt indicators (like `$` and `#`) to code blocks representing command-line inputs (rather than script files). And I'd like to flag text returned by a command so that *only* the commands get copied, effectively ignoring the returned text, diff-removed lines, diff markers, line numbers, and prompt indicators.
I had previously implemented a solution based *heavily* on Aaron Luna's blog post, [Hugo: Add Copy-to-Clipboard Button to Code Blocks with Vanilla JS](https://aaronluna.dev/blog/add-copy-button-to-code-blocks-hugo-chroma/). Getting that Chroma-focused solution to work well with Torchlight-formatted code blocks took some work, particularly since I'm inept at web development and can barely spell "CSS" and "JavaScrapped".
But I[^copilot] eventually fumbled through the changes required to meet my #goals, and I'm pretty happy with the result.
[^copilot]: With a little help from my Copilot buddy...
#### Custom classes
Remember Torchlight's in-line annotations that I mentioned earlier? They're pretty capable out of the box, but can also be expanded through the use of [custom classes](https://torchlight.dev/docs/annotations/classes). This makes it pretty easy to selectively apply special handling to lines of code, something that's otherwise pretty dang tricky to do with Chroma.
So, for instance, I could add a class `.cmd` for standard user-level command-line inputs:
```shell
# torchlight! {"torchlightAnnotations":false}
sudo make me a sandwich # [tl! .cmd]
```
```shell
sudo make me a sandwich # [tl! .cmd]
```
Or `.cmd_root` for a root prompt:
```shell
# torchlight! {"torchlightAnnotations": false}
wall "Make your own damn sandwich." # [tl! .cmd_root]
```
```shell
wall "Make your own damn sandwich." # [tl! .cmd_root]
```
And for deviants:
```powershell
# torchlight! {"torchlightAnnotations": false}
Write-Host -ForegroundColor Green "A taco is a sandwich" # [tl! .cmd_pwsh]
```
```powershell
Write-Host -ForegroundColor Green "A taco is a sandwich" # [tl! .cmd_pwsh]
```
I also came up with a cleverly-named `.nocopy` class for the returned lines that shouldn't be copyable:
```shell
# torchlight! {"torchlightAnnotations": false}
copy this # [tl! .cmd]
but not this # [tl! .nocopy]
```
```shell
copy this # [tl! .cmd]
but not this # [tl! .nocopy]
```
So that's how I'll tie my custom classes to individual lines of code[^ranges], but I still need to actually define those classes.
I'll drop those at the bottom of the `assets/css/torchlight.css` file I created earlier:
```css
// torchlight! {"lineNumbers": true}
/* [tl! collapse:start]
/*********************************************
* Basic styling for Torchlight code blocks. *
**********************************************/
/*
Margin and rounding are personal preferences,
overflow-x-auto is recommended.
*/
pre {
border-radius: 0.25rem;
margin-top: 1rem;
margin-bottom: 1rem;
overflow-x: auto;
}
/*
Add some vertical padding and expand the width
to fill its container. The horizontal padding
comes at the line level so that background
colors extend edge to edge.
*/
pre.torchlight {
display: block;
min-width: -webkit-max-content;
min-width: -moz-max-content;
min-width: max-content;
padding-top: 1rem;
padding-bottom: 1rem;
}
/*
Horizontal line padding to match the vertical
padding from the code block above.
*/
pre.torchlight .line {
padding-left: 1rem;
padding-right: 1rem;
}
/*
Push the code away from the line numbers and
summary caret indicators.
*/
pre.torchlight .line-number,
pre.torchlight .summary-caret {
margin-right: 1rem;
}
/*********************************************
* Focus styling *
**********************************************/
/*
Blur and dim the lines that don't have the `.line-focus` class,
but are within a code block that contains any focus lines.
*/
.torchlight.has-focus-lines .line:not(.line-focus) {
transition: filter 0.35s, opacity 0.35s;
filter: blur(.095rem);
opacity: .65;
}
/*
When the code block is hovered, bring all the lines into focus.
*/
.torchlight.has-focus-lines:hover .line:not(.line-focus) {
filter: blur(0px);
opacity: 1;
}
/*********************************************
* Collapse styling *
**********************************************/
.torchlight summary:focus {
outline: none;
}
/* Hide the default markers, as we provide our own */
.torchlight details > summary::marker,
.torchlight details > summary::-webkit-details-marker {
display: none;
}
.torchlight details .summary-caret::after {
pointer-events: none;
}
/* Add spaces to keep everything aligned */
.torchlight .summary-caret-empty::after,
.torchlight details .summary-caret-middle::after,
.torchlight details .summary-caret-end::after {
content: " ";
}
/* Show a minus sign when the block is open. */
.torchlight details[open] .summary-caret-start::after {
content: "-";
}
/* And a plus sign when the block is closed. */
.torchlight details:not([open]) .summary-caret-start::after {
content: "+";
}
/* Hide the [...] indicator when open. */
.torchlight details[open] .summary-hide-when-open {
display: none;
}
/* Show the [...] indicator when closed. */
.torchlight details:not([open]) .summary-hide-when-open {
display: initial;
} /* [tl! collapse:end]
/*********************************************
* Additional styling *
**********************************************/
/* Fix for disjointed horizontal scrollbars */
.highlight div {
overflow-x: visible;
}
/* [tl! focus:start]
Insert prompt indicators on interactive shells.
*/
.cmd::before {
color: var(--base07);
content: "$ ";
}
.cmd_root::before {
color: var(--base08);
content: "# ";
}
.cmd_pwsh::before {
color: var(--base07);
content: "PS> ";
}
/*
Don't copy shell outputs
*/
.nocopy {
webkit-user-select: none;
user-select: none;
} /* [tl! focus:end]
```
[^ranges]: Or ranges of lines, using the same syntax as before: `[tl! .nocopy:5]` will make this line and the following five uncopyable.
The `.cmd` classes will just insert the respective prompt _before_ each flagged line, and the `.nocopy` class will make it it so that the lines aren't selectable. Now for the tricky part...
#### Copy that blocky
There are two major pieces for the code-copy wizardry: the CSS to style/arrange the copy button and language label, and the JavaScript to make it work.
I put the CSS in `assets/css/code-copy-button.css`. It's basically straight from Aaron's post but with a few stanzas removed, a few elements renamed, and a few values tweaked to fit this site:
```css
// torchlight! {"lineNumbers": true}
/* adapted from https://aaronluna.dev/blog/add-copy-button-to-code-blocks-hugo-chroma/ */
.highlight-wrapper /* already set by torchlight.css [tl! remove:3] */
display: block;
}
/* [tl! reindex(-4)] */
.highlight {
position: relative;
z-index: 0;
padding: 0;
margin: 0; /* [tl! remove] */
margin: 40px 0 10px 0; /* a little more breathing room [tl! reindex(-1)] */
border-radius: 4px;
}
.highlight > .chroma { /* chroma-specific [tl! remove:start] */
color: #d0d0d0;
background-color: #212121;
position: static;
z-index: 1;
border-radius: 4px;
padding: 10px;
}
.chroma .lntd:first-child {
padding: 7px 7px 7px 10px;
margin: 0;
}
.chroma .lntd:last-child {
padding: 7px 10px 7px 7px;
margin: 0;
}
/* [tl! remove:end] */
.copy-code-button { /* [tl! reindex(-19)] */
position: absolute;
z-index: 2;
right: 0;
top: 0; /* [tl! remove] */
top: -29px; /* put the button above the code block instead of in it [tl! reindex(-1)] */
font-size: 13px;
font-weight: 700;
line-height: 14px;
letter-spacing: 0.5px;
width: 65px;
color: #232326;
background-color: #7f7f7f;
border: 1.25px solid #232326;
border-top-left-radius: 0;
border-top-right-radius: 4px;
border-bottom-right-radius: 0;
border-bottom-left-radius: 4px;
white-space: nowrap;
padding: 4px 4px 5px 4px;
margin: 0 0 0 1px;
cursor: pointer;
opacity: 0.6;
}
.copy-code-button:hover,
.copy-code-button:focus,
.copy-code-button:active,
.copy-code-button:active:hover {
color: #222225;
background-color: #b3b3b3;
opacity: 0.8;
}
.copyable-text-area {
position: absolute;
height: 0;
z-index: -1;
opacity: .01;
}
```