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fix: Markdown support in listings templates #11760

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merged 14 commits into from
Jan 6, 2025
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Merged

fix: Markdown support in listings templates #11760

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f9a5250
fix: Markdown is no longer supported in listings (>= 1.7.5)
mcanouil Dec 30, 2024
4b4c36b
revert: unwanted change
mcanouil Dec 30, 2024
0f779cf
fix: use markdown div thus no raw block
mcanouil Jan 2, 2025
911207e
refactor: use markdown syntax
mcanouil Jan 2, 2025
8463bc7
revert: use raw block to avoid "p"
mcanouil Jan 2, 2025
0af2dd7
fix: typo in div code
mcanouil Jan 2, 2025
5d1ef85
refactor: put if/else inside code block
mcanouil Jan 2, 2025
0aafe42
fix: use raw block for localizedString and don't escape content
mcanouil Jan 2, 2025
43ff451
fix: use raw block instead of inline
mcanouil Jan 2, 2025
f03ee1e
fix: no need to escape
mcanouil Jan 2, 2025
d52e2ba
fix: no need to escape base64 value
mcanouil Jan 2, 2025
2b73ea2
test: styles.sccs does not exist
mcanouil Jan 2, 2025
61094dd
Merge branch 'main' into fix/issue11758
mcanouil Jan 2, 2025
9c43d63
fix: ensure no extra`<p>` tag is added
mcanouil Jan 2, 2025
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31 changes: 14 additions & 17 deletions src/resources/projects/website/listing/_filter.ejs.md
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localizedString() usage here will insert a user provided value. I think it is safer to keep using <%- here, especially when used in HTML attribute, as we can't know which character would be used.

Maybe there won't be any < used for listing-page-order-by but if so, then I think it could break HTML.

That is my thinking. If there is a specific reason, I am missing it, so I would really like to understand and learn something new. Why replacing ?

My first though is that using %<- for escaping is safer.

Thank you

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@mcanouil mcanouil Jan 7, 2025 •
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The value is used inside text attribute or inside div which means the content is directly displayed to the users.
Escaping what's supposed to be a string would lead to weird placeholder, aria-label, and option text display.

image

Why would the text need escaping? I might have missed something but to me, there are no reasons to escape those values.

Both "work" and both can lead to unexpected outputs when non ASCII string provided.
I don't think there is a perfect solution. The rational being the use of = was the same as the overall PR, i.e., allow Markdown/HTML (of course no markdown evaluation is possible anyway when inside raw block).

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My understanding of this <%- vs <%= in template is that

  • Templating here is used to create HTML content
  • Some characters in HTML have meaning for the structure and so if they need to be shown as text, they should be HTML escape so that in browser they are shown as text, and not considered HTML

Maybe this won't ever happen but I was thinking it is safer to always HTML escape <%- when we know the content provided shouldn't be interpreted as HTML structure.

Example in lodash doc #11787 is quite explicite about escaping

// Use the HTML "escape" delimiter to escape data property values.
var compiled = _.template('<b><%- value %></b>');
compiled({ 'value': '<script>' });
// => '<b>&lt;script&gt;</b>'

If you want to write <script> as such in strong case, then you need the template to HTML escape the value.

So for language customizable value, I am thinking it is better to protect if a user wants to use something like quotes (") in the value.

Maybe I am wrong about this but I think my thinking sum up

  • <%- would be safer as this is why it was used before. Maybe it is not useful but it does not harm to use it
  • I don't see the gain of switching to <%=, especially if it could potentially be opened to regression.

🤷

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As all the occurrences are in an HTML raw block, I think we can go (back) with <%- as no markdown will ever work there.

Should I do the PR?

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To keep on the purpose of learning, as this is still unclear, can you explain to me

no markdown will ever work there.

Or rather you'll confirm if I understand correctly

  • This ejs template is in fact a markdown file
  • So we should be carefull when not in a raw block because Markdown in HTML will be interpreted (which is the initial problem)
  • And in this case, escaping could be harmful because it could break the markdown syntax.
  • And so what I shared above is really valid only inside raw block, or inside a template file that is not interpreted as .md file.

I think this is what I was missing, right ?

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Yes, that's it.

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@mcanouil mcanouil Jan 7, 2025 •
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We should probably update the documentation about all this story:

  • using raw block (Pandoc memory issue and possible parsing issue that could happen, as without, Pandoc has to guess it's HTML)
  • EJS templates in Quarto are read as Mardown files

https://quarto.org/docs/websites/website-listings-custom.html

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I went ahead and made a PR:

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Also opened a documentation issue:

Original file line number Diff line number Diff line change
Expand Up @@ -10,32 +10,29 @@ const sortUi = listing['sort-ui'];
<% const sortableFields = listing.utilities.sortableFieldData(); %>
<% if (sortUi && sortableFields.length > 0) { %>
<div class="input-group input-group-sm quarto-listing-sort">
<span class="input-group-text"><i class="bi bi-sort-down"></i></span>
<select
<span class="input-group-text"><i class="bi bi-sort-down"></i></span>
<select
id="listing-<%- listing.id %>-sort"
class="form-select"
aria-label="<%- listing.utilities.localizedString("listing-page-order-by")%>"
aria-label="<%= listing.utilities.localizedString("listing-page-order-by") %>"
onChange="window['quarto-listings']['listing-<%- listing.id %>'].sort(this.options[this.selectedIndex].value, { order: this.options[this.selectedIndex].getAttribute('data-direction')})"
>
<option value="" disabled selected hidden><%- listing.utilities.localizedString("listing-page-order-by")%></option>
<option value="index" data-direction="asc"><%- listing.utilities.localizedString("listing-page-order-by-default")%></option>
<% for (const sortData of sortableFields) { %>
<option
value="<%- sortData.listingSort.field %>"
data-direction="<%- sortData.listingSort.direction %>">
<%= sortData.description %>
</option>
<% } %>
</select>
<option value="" disabled selected hidden><%= listing.utilities.localizedString("listing-page-order-by") %></option>
<option value="index" data-direction="asc"><%= listing.utilities.localizedString("listing-page-order-by-default") %></option>
<% for (const sortData of sortableFields) { %>
<option
value="<%- sortData.listingSort.field %>"
data-direction="<%- sortData.listingSort.direction %>">
<%= sortData.description %>
</option>
<% } %>
</select>
</div>


<% } %>

<% if (filterUi) { %>
<div class="input-group input-group-sm quarto-listing-filter">
<span class="input-group-text"><i class="bi bi-search"></i></span>
<input type="text" class="search form-control" placeholder="<%- listing.utilities.localizedString("listing-page-filter")%>" />
<input type="text" class="search form-control" placeholder="<%= listing.utilities.localizedString("listing-page-filter") %>" />
</div>
<% } %>
</div>
Expand Down
4 changes: 3 additions & 1 deletion src/resources/projects/website/listing/_metadata.ejs.md
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Expand Up @@ -2,7 +2,9 @@
const categories = item.categories !== undefined ? item.categories.join(',') : undefined;
%>

<div class="quarto-listing-item-metadata" style-"display:none;">
```{=html}
<div class="quarto-listing-item-metadata" style="display:none;">
<span class="original-value" data-original-value="${itemNumber}" style="display:none;"></span>
<% if (categories !== undefined) { %><span class="categories" data-categories="${categories}" style="display:none;"></span><% } %>
</div>
```
6 changes: 3 additions & 3 deletions src/resources/projects/website/listing/_pagination.ejs.md
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Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
<div class="listing-no-matching d-none"><%- listing.utilities.localizedString("listing-page-no-matches")%></div>
<% if (listing["page-size"] < items.length) { %>
```{=html}
<div class="listing-no-matching d-none"><%= listing.utilities.localizedString("listing-page-no-matches") %></div>
<% if (listing["page-size"] < items.length) { %>
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<nav id="<%- listing.id %>-pagination" class="listing-pagination" aria-label="Page Navigation">
<ul class="pagination"></ul>
</nav>
```
<% } %>
```
86 changes: 68 additions & 18 deletions src/resources/projects/website/listing/item-default.ejs.md
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Expand Up @@ -31,44 +31,94 @@ return value;

let value = readField(item, field);
if (value !== undefined) {
print(`<div class="metadata-value listing-${field}">${listing.utilities.outputLink(item, field, value)}</div>`);
print(`<div class="metadata-value listing-${field}">${listing.utilities.outputLink(item, field, value)}</div>`);
}
}
%>

<div class="quarto-post image-<%= imageAlign %>" <%= listing.utilities.metadataAttrs(item) %>>
::: {.quarto-post .image-<%= imageAlign %> <%= listing.utilities.metadataAttrs(item) %>}
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<% if (fields.includes('image')) { %>
<div class="thumbnail">
<a href="<%- item.path %>" class="no-external">

```{=html}
<div class="thumbnail"><a href="<%- item.path %>" class="no-external">
<% if (item.image) { %>
<%= listing.utilities.img(itemNumber, item.image, "thumbnail-image", item['image-alt'], item['image-lazy-loading'] ?? listing['image-lazy-loading']) %>
<% } else { %>
<%= listing.utilities.imgPlaceholder(listing.id, itemNumber, item.outputHref) %>
<% } %>
</a>
</div>
</a></div>
```

<% } %>
<div class="body">

::: {.body}

<% if (fields.includes('title')) { %>
<h3 class="no-anchor listing-title"><a href="<%- item.path %>" class="no-external"><%= item.title %></a></h3>
<% if (fields.includes('subtitle')) { %>
<div class="listing-subtitle"><a href="<%- item.path %>" class="no-external"><%= item.subtitle %></a></div>
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<% } %>
<% if (fields.includes('categories') && item.categories) { %>
<% } %>

<% if (fields.includes('categories') && item.categories) { %>

```{=html}
<div class="listing-categories">
<% for (const category of item.categories) { %>
<div class="listing-category" onclick="window.quartoListingCategory('<%=utils.b64encode(category)%>'); return false;"><%= category %></div>
<div class="listing-category" onclick="window.quartoListingCategory('<%= utils.b64encode(category) %>'); return false;"><%= category %></div>
<% } %>
</div>
<% } %>
```

<% } %>

<% if (fields.includes('description')) { %>
<div class="delink listing-description"><a href="<%- item.path %>" class="no-external"><%= item.description %></a></div>

```{=html}
<div class="delink listing-description"><a href="<%- item.path %>" class="no-external">
```

<%= item.description %>

```{=html}
</a></div>
```

<% } %>
</div>
<div class="metadata"><a href="<%- item.path %>" class="no-external">
<% if (fields.includes('date') && item.date) { %><div class="listing-date"><%= item.date %></div><% } %>
<% if (fields.includes('author') && item.author) { %><div class="listing-author"><%= item.author %></div><% } %>
<% if (fields.includes('reading-time') && item['reading-time']) { %> <div class="listing-reading-time"><%= item['reading-time'] %></div> <% } %>

:::

::: {.metadata}

```{=html}
<a href="<%- item.path %>" class="no-external">
```

<% if (fields.includes('date') && item.date) { %>
<div class="listing-date"><%= item.date %></div>
<% } %>

<% if (fields.includes('author') && item.author) { %>
<div class="listing-author"><%= item.author %></div>
<% } %>
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<% if (fields.includes('reading-time') && item['reading-time']) { %>

```{=html}
<div class="listing-reading-time"><%= item['reading-time'] %></div>
```

<% } %>

<% for (const field of otherFields) { %>
<% outputMetadata(item, field) %><% } %></a></div>
<% outputMetadata(item, field) %>
<% } %>

</div>
```{=html}
</a>
```

:::

:::
124 changes: 96 additions & 28 deletions src/resources/projects/website/listing/item-grid.ejs.md
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Original file line number Diff line number Diff line change
Expand Up @@ -37,83 +37,151 @@ return !["title", "image", "image-alt", "date", "author", "subtitle", "descripti
});
%>

<div class="g-col-1" <%= listing.utilities.metadataAttrs(item) %>>
::: {.g-col-1 <%= listing.utilities.metadataAttrs(item) %> }
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```{=html}
<a href="<%- item.path %>" class="quarto-grid-link">
<div class="quarto-grid-item card h-100 <%-`card-${align}`%><%= hideBorders ? ' borderless' : '' %>">
<div class="quarto-grid-item card h-100 <%= `card-${align}` %><%= hideBorders ? ' borderless' : '' %>">
```

<% if (fields.includes('image')) { %>

<% if (item.image) { %>

```{=html}
<p class="card-img-top">
<%= listing.utilities.img(itemNumber, item.image, "thumbnail-image card-img", item['image-alt'], item['image-lazy-loading'] ?? listing['image-lazy-loading']) %>
</p>
```

<% } else { %>

```{=html}
<%= listing.utilities.imgPlaceholder(listing.id, itemNumber, item.outputHref) %>
<% } %>
```

<% } %>
<% } %>

<% if (showField('title') || showField('subtitle') || showField('description') || showField('author') || showField('date') || otherFields.length > 0) { %>

<div class="card-body post-contents">
<% if (showField('title')) { %><h5 class="no-anchor card-title listing-title"><%= item.title %></h5><% } %>
<% if (showField('subtitle')) { %><div class="card-subtitle listing-subtitle"><%= item.subtitle %></div><% } %>
<% if (showField('reading-time')) { %><div class="listing-reading-time card-text text-muted"><%= item['reading-time'] %></div> <% } %>
::: {.card-body .post-contents}

<% if (showField('title')) { %>
<h5 class="no-anchor card-title listing-title"><%= item.title %></h5>
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<% } %>

<% if (showField('subtitle')) { %>
<div class="card-subtitle listing-subtitle"><%= item.subtitle %></div>
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<% } %>

<% if (showField('reading-time')) { %>

```{=html}
<div class="listing-reading-time card-text text-muted"><%= item['reading-time'] %></div>
```

<% } %>

<% if (fields.includes('categories') && item.categories) { %>

```{=html}
<div class="listing-categories">
<% for (const category of item.categories) { %>
<div class="listing-category" onclick="window.quartoListingCategory('<%=utils.b64encode(category)%>'); return false;"><%= category %></div>
<% } %>
<% for (const category of item.categories) { %>
<div class="listing-category" onclick="window.quartoListingCategory('<%= utils.b64encode(category ) %>'); return false;"><%= category %></div>
<% } %>
</div>
```

<% } %>

<% if (showField('description')) { %>

<div class="card-text listing-description delink"><%= item.description %></div>
```{=html}
<div class="card-text listing-description delink">
```

<%= item.description %>

```{=html}
</div>
```

<% } %>
<%

<%
const flexJustify = showField('author') && showField('date') ? "justify" : showField('author') ? "start" : "end";
%>

<% if (showField('author') || showField('date')) { %>
<div class="card-attribution card-text-small <%-flexJustify%>">
<% if (showField('author')) { %><div class="listing-author"><%= item.author %></div><% } %>
<% if (showField('date')) { %><div class="listing-date"><%= item.date %></div><% } %>

```{=html}
<div class="card-attribution card-text-small <%- flexJustify %>">
```

<% if (showField('author')) { %>
<div class="listing-author"><%= item.author %></div>
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<% } %>

<% if (showField('date')) { %>
<div class="listing-date"><%= item.date %></div>
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<% } %>

```{=html}
</div>
```

<% } %>

<% if (otherFields.length > 0) { %>

```{=html}
<table class="card-other-values">
<% for (const field of otherFields) {
let value = readField(item, field);
<% for (const field of otherFields) {
let value = readField(item, field);
%>
<tr>
```

<td><%= listing.utilities.fieldName(field) %></td>
<td class="<%-field%>"><%= listing.utilities.outputLink(item, field, value) %></td>
<td class="<%- field %>"><%= listing.utilities.outputLink(item, field, value) %></td>

```{=html}
</tr>
<% } %>
</table>
```

<% } %>

</div>
:::
<% } %>

<% if (fields.includes('filename') || fields.includes('file-modified')) { %>

<div class="card-footer">
::: {.card-footer}

<% if (fields.includes('filename')) { %>
<div class="card-filename listing-filename">
<%= item.filename ? item.filename : "&nbsp;" %>
</div>

```{=html}
<div class="card-filename listing-filename"><%= item.filename ? item.filename : "&nbsp;" %></div>
```

<% } %>

<% if (fields.includes('file-modified')) { %>
<div class="card-file-modified listing-file-modified">
<%= item['file-modified'] ? item['file-modified'] : "&nbsp;"%>
</div>

```{=html}
<div class="card-file-modified listing-file-modified"><%= item['file-modified'] ? item['file-modified'] : "&nbsp;" %></div>
```

<% } %>
</div>

:::
<% } %>
</div></a></div>

```{=html}
</div></a>
```

:::
6 changes: 3 additions & 3 deletions src/resources/projects/website/listing/listing-default.ejs.md
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
:::{.list .quarto-listing-default}
``````{=html}
::: {.list .quarto-listing-default}

<% for (const item of items) { %>
<% partial('item-default.ejs.md', {listing, item, utils }) %>
<% } %>
``````

:::
6 changes: 3 additions & 3 deletions src/resources/projects/website/listing/listing-grid.ejs.md
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Original file line number Diff line number Diff line change
Expand Up @@ -2,10 +2,10 @@
const cols = listing['grid-columns'];
%>

:::{.list .grid .quarto-listing-cols-<%=cols%>}
```{=html}
::: {.list .grid .quarto-listing-cols-<%= cols %>}

<% for (const item of items) { %>
<% partial('item-grid.ejs.md', {listing, item, utils }) %>
<% } %>
```

:::
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