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Add support for Obsidian type blockquote alerts
* Make the alert type parsing more flexible to support more types * Add `AlertTitle` and `AlertSign` (for folding) Note that GitHub will not render callouts with alert title/sign. See https://help.obsidian.md/Editing+and+formatting/Callouts Closes #12805 Closes #12801
This commit is contained in:
Bjørn Erik Pedersen
parent
0c453420e6
commit
e651d29801
5 changed files with 129 additions and 39 deletions
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@ -24,6 +24,20 @@ Blockquote render hook templates receive the following [context]:
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(`string`) Applicable when [`Type`](#type) is `alert`, this is the alert type converted to lowercase. See the [alerts](#alerts) section below.
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###### AlertTitle
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{{< new-in 0.134.0 >}}
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(`hstring.HTML`) Applicable when [`Type`](#type) is `alert` when using [Obsidian callouts] syntax, this is the alert title converted to HTML.
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###### AlertSign
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{{< new-in 0.134.0 >}}
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(`string`) Applicable when [`Type`](#type) is `alert` when using [Obsidian callouts] syntax, this is one of "+", "-" or "" (empty string) to indicate the presence of a foldable sign.
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[Obsidian callouts]: https://help.obsidian.md/Editing+and+formatting/Callouts
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###### Attributes
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(`map`) The [Markdown attributes], available if you configure your site as follows:
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@ -117,13 +131,13 @@ Also known as _callouts_ or _admonitions_, alerts are blockquotes used to emphas
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{{% note %}}
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This syntax is compatible with the GitHub Alert Markdown extension.
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This syntax is compatible with both the GitHub Alert Markdown extension and Obsidian's callout syntax.
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But note that GitHub will not recognize callouts with one of Obsidian's extensions (e.g. callout title or the foldable sign).
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{{% /note %}}
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The first line of each alert is an alert designator consisting of an exclamation point followed by the alert type, wrapped within brackets.
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The blockquote render hook below renders a multilingual alert if an alert desginator is present, otherwise it renders a blockquote according to the CommonMark specification.
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The blockquote render hook below renders a multilingual alert if an alert designator is present, otherwise it renders a blockquote according to the CommonMark specification.
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{{< code file=layouts/_default/_markup/render-blockquote.html copy=true >}}
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{{ $emojis := dict
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@ -109,6 +109,16 @@ type BlockquoteContext interface {
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// The GitHub alert type converted to lowercase, e.g. "note".
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// Only set if Type is "alert".
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AlertType() string
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// The alert title.
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// Currently only relevant for Obsidian alerts.
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// GitHub does not suport alert titles and will not render alerts with titles.
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AlertTitle() hstring.HTML
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// The alert sign, "+" or "-" or "" used to indicate folding.
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// Currently only relevant for Obsidian alerts.
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// GitHub does not suport alert signs and will not render alerts with signs.
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AlertSign() string
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}
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type PositionerSourceTargetProvider interface {
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@ -74,8 +74,8 @@ func (r *htmlRenderer) renderBlockquote(w util.BufWriter, src []byte, node ast.N
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ordinal := ctx.GetAndIncrementOrdinal(ast.KindBlockquote)
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typ := typeRegular
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alertType := resolveGitHubAlert(string(text))
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if alertType != "" {
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alert := resolveBlockQuoteAlert(string(text))
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if alert.typ != "" {
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typ = typeAlert
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}
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@ -94,7 +94,7 @@ func (r *htmlRenderer) renderBlockquote(w util.BufWriter, src []byte, node ast.N
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bqctx := &blockquoteContext{
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BaseContext: render.NewBaseContext(ctx, renderer, n, src, nil, ordinal),
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typ: typ,
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alertType: alertType,
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alert: alert,
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text: hstring.HTML(text),
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AttributesHolder: attributes.New(n.Attributes(), attributes.AttributesOwnerGeneral),
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}
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@ -133,11 +133,9 @@ func (r *htmlRenderer) renderBlockquoteDefault(
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type blockquoteContext struct {
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hooks.BaseContext
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text hstring.HTML
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alertType string
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typ string
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alert blockQuoteAlert
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*attributes.AttributesHolder
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}
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@ -146,25 +144,40 @@ func (c *blockquoteContext) Type() string {
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}
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func (c *blockquoteContext) AlertType() string {
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return c.alertType
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return c.alert.typ
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}
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func (c *blockquoteContext) AlertTitle() hstring.HTML {
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return hstring.HTML(c.alert.title)
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}
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func (c *blockquoteContext) AlertSign() string {
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return c.alert.sign
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}
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func (c *blockquoteContext) Text() hstring.HTML {
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return c.text
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}
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// https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts
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// Five types:
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// [!NOTE], [!TIP], [!WARNING], [!IMPORTANT], [!CAUTION]
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// Note that GitHub's implementation is case-insensitive.
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var gitHubAlertRe = regexp.MustCompile(`(?i)^<p>\[!(NOTE|TIP|WARNING|IMPORTANT|CAUTION)\]`)
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var blockQuoteAlertRe = regexp.MustCompile(`^<p>\[!([a-zA-Z]+)\](-|\+)?[^\S\r\n]?([^\n]*)\n?`)
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// resolveGitHubAlert returns one of note, tip, warning, important or caution.
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// An empty string if no match.
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func resolveGitHubAlert(s string) string {
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m := gitHubAlertRe.FindStringSubmatch(s)
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if len(m) == 2 {
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return strings.ToLower(m[1])
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func resolveBlockQuoteAlert(s string) blockQuoteAlert {
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m := blockQuoteAlertRe.FindStringSubmatch(s)
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if len(m) == 4 {
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return blockQuoteAlert{
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typ: strings.ToLower(m[1]),
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sign: m[2],
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title: m[3],
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}
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return ""
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}
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return blockQuoteAlert{}
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}
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// Blockquote alert syntax was introduced by GitHub, but is also used
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// by Obsidian which also support some extended attributes: More types, alert titles and a +/- sign for folding.
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type blockQuoteAlert struct {
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typ string
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sign string
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title string
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}
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@ -109,3 +109,48 @@ Content: {{ .Content }}
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b := hugolib.Test(t, files)
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b.AssertFileContent("public/p1/index.html", "Content: <blockquote>\n</blockquote>\n")
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}
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func TestBlockquObsidianWithTitleAndSign(t *testing.T) {
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t.Parallel()
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files := `
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-- hugo.toml --
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-- content/_index.md --
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---
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title: "Home"
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---
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> [!danger]
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> Do not approach or handle without protective gear.
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> [!tip] Callouts can have custom titles
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> Like this one.
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> [!tip] Title-only callout
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> [!faq]- Foldable negated callout
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> Yes! In a foldable callout, the contents are hidden when the callout is collapsed
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> [!faq]+ Foldable callout
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> Yes! In a foldable callout, the contents are hidden when the callout is collapsed
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-- layouts/index.html --
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{{ .Content }}
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-- layouts/_default/_markup/render-blockquote.html --
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AlertType: {{ .AlertType }}|
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AlertTitle: {{ .AlertTitle }}|
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AlertSign: {{ .AlertSign | safeHTML }}|
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Text: {{ .Text }}|
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`
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b := hugolib.Test(t, files)
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b.AssertFileContent("public/index.html",
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"AlertType: tip|\nAlertTitle: Callouts can have custom titles|\nAlertSign: |",
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"AlertType: tip|\nAlertTitle: Title-only callout</p>|\nAlertSign: |",
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"AlertType: faq|\nAlertTitle: Foldable negated callout|\nAlertSign: -|\nText: <p>Yes!",
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"AlertType: faq|\nAlertTitle: Foldable callout|\nAlertSign: +|",
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"AlertType: danger|\nAlertTitle: |\nAlertSign: |\nText: <p>Do not approach or handle without protective gear.</p>\n|",
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)
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}
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@ -19,42 +19,50 @@ import (
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qt "github.com/frankban/quicktest"
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)
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func TestResolveGitHubAlert(t *testing.T) {
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func TestResolveBlockQuoteAlert(t *testing.T) {
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t.Parallel()
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c := qt.New(t)
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tests := []struct {
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input string
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expected string
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expected blockQuoteAlert
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}{
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{
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input: "[!NOTE]",
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expected: "note",
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expected: blockQuoteAlert{typ: "note"},
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},
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{
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input: "[!WARNING]",
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expected: "warning",
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input: "[!FaQ]",
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expected: blockQuoteAlert{typ: "faq"},
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},
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{
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input: "[!TIP]",
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expected: "tip",
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input: "[!NOTE]+",
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expected: blockQuoteAlert{typ: "note", sign: "+"},
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},
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{
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input: "[!IMPORTANT]",
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expected: "important",
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input: "[!NOTE]-",
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expected: blockQuoteAlert{typ: "note", sign: "-"},
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},
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{
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input: "[!CAUTION]",
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expected: "caution",
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input: "[!NOTE] This is a note",
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expected: blockQuoteAlert{typ: "note", title: "This is a note"},
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},
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{
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input: "[!FOO]",
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expected: "",
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input: "[!NOTE]+ This is a note",
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expected: blockQuoteAlert{typ: "note", sign: "+", title: "This is a note"},
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},
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{
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input: "[!NOTE]+ This is a title\nThis is not.",
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expected: blockQuoteAlert{typ: "note", sign: "+", title: "This is a title"},
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},
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{
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input: "[!NOTE]\nThis is not.",
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expected: blockQuoteAlert{typ: "note"},
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},
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}
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for _, test := range tests {
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c.Assert(resolveGitHubAlert("<p>"+test.input), qt.Equals, test.expected)
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for i, test := range tests {
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c.Assert(resolveBlockQuoteAlert("<p>"+test.input), qt.Equals, test.expected, qt.Commentf("Test %d", i))
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}
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}
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