feat/pager: implement markdown syntax highlighting

charmbracelet · Jan 16, 2025 · 1af591f · 1af591f
1 parent c93da09
commit 1af591f
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Showing 2 changed files with 15 additions and 0 deletions.
diff --git a/pager/command.go b/pager/command.go
@@ -7,6 +7,7 @@ import (
 	"github.com/charmbracelet/bubbles/help"
 	"github.com/charmbracelet/bubbles/viewport"
 	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/glamour"
 	"github.com/charmbracelet/gum/internal/stdin"
 	"github.com/charmbracelet/gum/internal/timeout"
 )
@@ -31,6 +32,19 @@ func (o Options) Run() error {
 		}
 	}
 
+	if o.SyntaxHighlight != "" {
+		switch {
+		case o.SyntaxHighlight == "markdown":
+			renderedContent, err := glamour.Render(o.Content, "dark")
+			if err != nil {
+				return fmt.Errorf("unable to render: %w", err)
+			}
+			o.Content = renderedContent
+		default:
+			return fmt.Errorf("syntax-highlight language: markdown")
+		}
+	}
+
 	m := model{
 		viewport:            vp,
 		help:                help.New(),

diff --git a/pager/options.go b/pager/options.go
@@ -10,6 +10,7 @@ import (
 type Options struct {
 	//nolint:staticcheck
 	Style               style.Styles  `embed:"" help:"Style the pager" set:"defaultBorder=rounded" set:"defaultPadding=0 1" set:"defaultBorderForeground=212" envprefix:"GUM_PAGER_"`
+	SyntaxHighlight     string        `help:"syntax highlighting (support language: markdown)" default:""`
 	Content             string        `arg:"" optional:"" help:"Display content to scroll"`
 	ShowLineNumbers     bool          `help:"Show line numbers" default:"true"`
 	LineNumberStyle     style.Styles  `embed:"" prefix:"line-number." help:"Style the line numbers" set:"defaultForeground=237" envprefix:"GUM_PAGER_LINE_NUMBER_"`