chore: update sidebar and widgets styles

I'm now using a widget that can be expanded/collapsed. It also allows
me to handle more effectively widgets overflow and to avoid styles
repetitions.
However, with stylelint rule "no-descending-specificity", I'm not sure
if the stylesheets are really logical... Maybe I should deactivate this
rule.

2 files changed, 100 insertions, 0 deletions

diff --git a/src/components/Widgets/ToC/ToC.module.scss b/src/components/Widgets/ToC/ToC.module.scss
new file mode 100644
index 0000000..a296659
--- /dev/null
+++ b/src/components/Widgets/ToC/ToC.module.scss
@@ -0,0 +1,70 @@
+@use "@styles/abstracts/functions" as fun;
+@use "@styles/abstracts/mixins" as mix;
+
+.item {
+  width: 100%;
+  margin: 0;
+
+  &::before {
+    display: none;
+  }
+}
+
+.link {
+  display: flex;
+  flex-flow: row nowrap;
+  width: 100%;
+  padding: var(--spacing-2xs) var(--spacing-sm);
+  background: none;
+  border-bottom: fun.convert-px(1) solid var(--color-border-lighter);
+  text-decoration: underline solid transparent 0;
+  transition: all 0.16s ease-in-out 0s, text-decoration-color 0s;
+
+  &:hover,
+  &:focus {
+    background: var(--color-bg-secondary);
+  }
+
+  &:focus {
+    color: var(--color-primary);
+    text-decoration-color: var(--color-primary-light);
+    text-decoration-thickness: 0.25ex;
+  }
+
+  &:active {
+    background: var(--color-bg-tertiary);
+    text-decoration-color: transparent;
+    text-decoration-thickness: 0;
+  }
+}
+
+.list {
+  width: 100%;
+  margin: 0;
+  counter-reset: link;
+
+  @include mix.media("screen") {
+    @include mix.dimensions("lg") {
+      font-size: var(--font-size-sm);
+      font-weight: 500;
+    }
+  }
+
+  > .item .link {
+    counter-increment: link;
+
+    &::before {
+      content: counters(link, ".") ". ";
+      color: var(--color-secondary);
+      padding-right: var(--spacing-2xs);
+    }
+  }
+
+  .item .item .link::before {
+    padding-left: var(--spacing-sm);
+  }
+
+  .item .item .item .link::before {
+    padding-left: var(--spacing-lg);
+  }
+}
diff --git a/src/components/Widgets/ToC/ToC.tsx b/src/components/Widgets/ToC/ToC.tsx
new file mode 100644
index 0000000..6010354
--- /dev/null
+++ b/src/components/Widgets/ToC/ToC.tsx
@@ -0,0 +1,30 @@
+import { ExpandableWidget, OrderedList } from '@components/WidgetParts';
+import { t } from '@lingui/macro';
+import { Heading } from '@ts/types/app';
+import useHeadingsTree from '@utils/hooks/useHeadingsTree';
+
+const ToC = () => {
+  const headingsTree = useHeadingsTree('article');
+  const title = t`Table of contents`;
+
+  const getItems = (headings: Heading[]) => {
+    return headings.map((heading) => {
+      return (
+        <li key={heading.id}>
+          <a href={`#${heading.id}`}>{heading.title}</a>
+          {heading.children.length > 0 && (
+            <OrderedList items={getItems(heading.children)} />
+          )}
+        </li>
+      );
+    });
+  };
+
+  return (
+    <ExpandableWidget title={title} expand={true} withBorders={true}>
+      <OrderedList items={getItems(headingsTree)} />
+    </ExpandableWidget>
+  );
+};
+
+export default ToC;