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markup/highlight: Add support to linkable line anchors on Chroma
Fixes #7622
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3 changed files with 26 additions and 0 deletions
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@ -43,6 +43,8 @@ Options:
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* `linenos`: configure line numbers. Valid values are `true`, `false`, `table`, or `inline`. `false` will turn off line numbers if it's configured to be on in site config. {{< new-in "0.60.0" >}} `table` will give copy-and-paste friendly code blocks.
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* `hl_lines`: lists a set of line numbers or line number ranges to be highlighted.
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* `linenostart=199`: starts the line number count from 199.
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* `anchorlinenos`: Configure anchors on line numbers. Valid values are `true` or `false`;
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* `lineanchors`: Configure a prefix for the anchors on line numbers. Will be suffixed with `-`, so linking to the line number 1 with the option `lineanchors=prefix` adds the anchor `prefix-1` to the page.
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### Example: Highlight Shortcode
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@ -50,6 +50,10 @@ type Config struct {
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LineNos bool
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LineNumbersInTable bool
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// When set, add links to line numbers
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AnchorLineNos bool
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LineAnchors string
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// Start the line numbers from this value (default is 1).
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LineNoStart int
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@ -63,12 +67,17 @@ type Config struct {
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}
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func (cfg Config) ToHTMLOptions() []html.Option {
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var lineAnchors string
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if cfg.LineAnchors != "" {
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lineAnchors = cfg.LineAnchors + "-"
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}
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var options = []html.Option{
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html.TabWidth(cfg.TabWidth),
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html.WithLineNumbers(cfg.LineNos),
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html.BaseLineNumber(cfg.LineNoStart),
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html.LineNumbersInTable(cfg.LineNumbersInTable),
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html.WithClasses(!cfg.NoClasses),
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html.LinkableLineNumbers(cfg.AnchorLineNos, lineAnchors),
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}
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if cfg.Hl_Lines != "" {
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@ -79,6 +79,21 @@ User-Agent: foo
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c.Assert(result, qt.Not(qt.Contains), "class=\"lnt\"")
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})
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c.Run("Highlight lines, linenumbers default on, anchorlinenumbers default on", func(c *qt.C) {
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cfg := DefaultConfig
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cfg.NoClasses = false
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cfg.LineNos = true
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cfg.AnchorLineNos = true
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h := New(cfg)
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result, _ := h.Highlight(lines, "bash", "")
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c.Assert(result, qt.Contains, "<span class=\"lnt\" id=\"2\">2\n</span>")
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result, _ = h.Highlight(lines, "bash", "lineanchors=test")
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c.Assert(result, qt.Contains, "<span class=\"lnt\" id=\"test-2\">2\n</span>")
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result, _ = h.Highlight(lines, "bash", "anchorlinenos=false,hl_lines=2")
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c.Assert(result, qt.Not(qt.Contains), "id=\"2\"")
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})
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c.Run("Highlight lines, linenumbers default on, linenumbers in table default off", func(c *qt.C) {
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cfg := DefaultConfig
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cfg.NoClasses = false
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